polyether ether adduct and composition

专利摘要:
POLYTIOether EARTH AND COMPOSITION. The use of Michael curing agents in compositions comprising sulfur-containing polymers, such as polythioethers and polysulphides useful in aerospace sealant applications, is described. Sulfur-containing adducts comprising Michael acceptor end groups are also described. Compositions including controlled release amine catalysts are also described.
公开号:BR112014031820B1
申请号:R112014031820-4
申请日:2013-06-21
公开日:2021-03-09
发明作者:Lawrence G. Anderson；Renhe Lin；Juexiao Cai；Marfi Ito；Raquel Keledjian
申请人:Prc-Desoto International, Inc；
IPC主号:

专利说明:

Technical field
[0001] The present invention relates to the use of chemical curing agents by adding Michael in compositions comprising sulfur-containing polymers, such as polyethers and polysulfides, useful in aerospace sealant applications. The description also refers to sulfur-containing adducts comprising terminal Michael acceptor groups and their compositions. History of the Invention
[0002] Sealants useful in aerospace and other applications must satisfy demanding mechanical, chemical and environmental requirements. Sealants can be applied to a variety of surfaces, including metal surfaces, primer coatings, intermediate coatings, finished coatings, and aged coatings. In sealants, such as those described in U.S. Patent No. 6,123,179, an amine catalyst is used to provide a cured product. These systems typically cure two hours in an oven and while exhibiting acceptable fuel and thermal resistance for many applications, a faster cure rate and improved performance are desirable. Summary of the Invention
[0003] Chemical Michael curing agents are often used in acrylic based polymeric systems and as described in U.S. Patent No. 3,138,573, have been adapted for use in polysulfide compositions. The application of chemical curing agents by adding Michael to sulfur-containing polymers not only results in cured sealants with faster cure rates and improved performance that includes fuel resistance and thermal resistance, but also provides a sealant with improved physical properties, such as like stretching.
[0004] Compositions with extended post-mixing life and controlled cure rate are also performed using a controlled release amine catalyst. In such systems, an amine catalyst, such as a strong base or primary amine that produces a rapid reaction rate, is protected or encapsulated and dispersed in the composition. Upon exposure, for example, to ultraviolet radiation, moisture or temperature, the catalytic amine is released and catalyzes the reaction by adding Michael. In certain embodiments, systems provide a post-mixing service life of more than 2 hours to 12 hours and cure within 24 to 72 hours after working time.
[0005] In a first aspect, polythether adducts comprising at least two terminal Michael acceptor groups are provided.
[0006] In a second aspect, compositions are provided comprising a polythioether polymer comprising at least two terminal groups reactive with Michael acceptor groups; and a compound having at least two Michael acceptor groups.
[0007] In a third aspect, compositions are provided comprising a polyethylene adduct provided by the present invention and a curing agent comprising at least two terminal groups that are reactive with Michael acceptor groups.
[0008] In a fourth aspect, compositions are provided comprising (a) the sulfur-containing adduct provided by the present invention; (b) a sulfur-containing polymer, comprising at least two terminal groups reactive with Michael acceptor groups; and (c) a monomeric compound having at least two Michael acceptor groups.
[0009] In a fifth aspect, adducts containing sulfur with hydroxyl termination are provided and comprise the reaction products of reagents comprising (a) a Michael acceptor adduct containing sulfur provided by the present invention; and (b) a compound containing a hydroxyl group and a group that is reactive with the terminal groups of the sulfur-containing Michael acceptor adduct.
[0010] In a sixth aspect, compositions are provided comprising (a) an adduct containing sulfur with hydroxyl termination, provided by the present invention; and (b) a polyisocyanate curing agent.
[0011] In a seventh aspect, amine-terminated sulfur-containing adducts comprising the reaction products of reagents comprising (a) a sulfur-containing Michael acceptor adduct provided by the present invention are provided; and (b) a compound containing an amine group and a group that is reactive with the terminal groups of the sulfur-containing Michael acceptor adduct.
[0012] In an eighth aspect, compositions are provided comprising (a) an amine-terminated sulfur-containing adduct provided by the present invention; and (b) a polyisocyanate curing agent.
[0013] In a ninth aspect, cured sealants are provided comprising a composition provided by the present invention.
[0014] In a tenth aspect, sealed openings are provided with a composition provided by the present invention.
[0015] In an eleventh aspect, methods for sealing an opening are provided and comprise (a) applying a composition provided by the present invention, formulated as a sealant to at least one surface defining an opening; (b) assemble the surfaces that define the opening; and (c) curing the composition to provide a sealed opening.
[0016] In a twelfth aspect, compositions are provided comprising (a) a compound comprising at least two terminal groups reactive with Michael acceptor groups; (b) a compound having at least two Michael acceptor groups; and (c) a controlled release amine catalyst, at least one of (a) and (b) comprising a polythioether polymer.
[0017] In a thirteenth aspect, a method is provided for using a composition comprising (a) a compound comprising at least two terminal groups reactive with Michael acceptor groups; (b) a compound having at least two Michael acceptor groups; and (c) a controlled release amine catalyst, at least one of (a) and (b) comprising a polythioether polymer. Detailed description of the Invention Definitions
[0018] For the purposes of the description below, it is understood that the embodiments provided by the present invention may consider several variations and sequences of alternative steps, except when expressly specified otherwise. In addition, with the exception of the examples, or if otherwise indicated, all figures expressing, for example, quantities of ingredients used in the report and in the claims should be understood as modified in all cases by the term "about". Consequently, unless otherwise indicated, the numerical parameters set out in the following report and in the appended claims are approximations that may vary, depending on the desired properties to be obtained. At a minimum and not with the intention of restricting the application of the doctrine of equivalents to the scope of the claims, each numerical parameter must be at least interpreted in the light of the number of significant digits reported and applying common rounding techniques.
[0019] Notwithstanding that the ranges and numerical parameters that establish the broad scope of the invention are approximate, the numerical values cited in the specific examples are reported as accurately as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard variation found in their respective test measurements.
[0020] Likewise, it should be understood that any numerical range mentioned here intends to include all the sub-ranges included therein. For example, a range of “1 to 10” is intended to include all sub-ranges between (and inclusive) the minimum quoted value of about 1 and the maximum quoted value of about 10, that is, having a minimum value equal to or greater than about 1 and a maximum value equal to or less than about 10. Likewise, in this application, the use of "or" means "and / or", unless specifically mentioned otherwise, even if "and / or" can be explicitly used in certain cases.
[0021] A dash / hyphen (“-“) that is not between two letters or symbols is used to indicate a point of attachment for a substituent or between two atoms. For example, - CONH2 is attached to another chemical moiety through the carbon atom.
[0022] "Alcanodiila" refers to a diradical of an acyclic, saturated, straight-chain or branched hydrocarbon group having, for example, from 1 to 18 carbon atoms (C1-18), from 1 to 14 carbon atoms ( C1-14), from 1 to 6 carbon atoms (C1-6), from 1 to 4 carbon atoms (C1-4) or from 1 to 3 hydrocarbon atoms (C1-3). It will be appreciated that a branched alkanediyl has at least three carbon atoms. In certain embodiments, the alkanediyl is C2-14 alkanediyl, C2-10 alkanediyl, C2-8 alkanediyl, C2-6 alkanediyl, C2-4 alkanediyl and, in certain embodiments, C2-3 alkanediyl. Examples of alkanediyl groups include methane-diyl (-CH2-), ethane-1,2-diyl (—CH2CH2—), propane-1,3-diyl and iso-propane-1,2-diyl (ex: —CH2CH2CH2— e - CH (CH3) CH2), butane-1,4-diyl (—CH2CH2CH2CH2—), pentane-1,5-diyl (- CH2CH2CH2CH2CH2 -), hexane-1,6-diyl (—CH2CH2CH2CH2CH2CH2—), heptane- 1,7-diyl, octane-1,8-diyl, nonane-1,9-diyl, decane-1,10-diyl, dodecane-1,12-diyl, and the like.
[0023] "Alcanocycloalkane" refers to a saturated hydrocarbon group having one or more cycloalkyl and / or cycloalkanodiyl groups and one or more alkyl and / or alkanodiyl groups, where cycloalkyl, cycloalkanodiyl, alkyl and alkanodiyl are defined herein. In certain embodiments, each cycloalkyl and / or cycloalkanediyl group (s) is C3-6, C5-6, and in certain embodiments, cyclohexyl or cyclohexanediyl. In certain embodiments, each alkyl and / or alkanediyl group (s) is C1-6, C1-4, C1-3 and in certain embodiments, methyl, methanodiyl, ethyl or ethane-1,2-diyl. In certain embodiments, the alkanocycloalkane group is C4-18 alkanocycloalkane, C4-16 alkanocycloalkane, C4-12 alkanocycloalkane, C4-12 alkanocycloalkane, C6-12 alkanocycloalkane, C6-10 alkanocycloalkane, and in certain embodiments, C6 alkanocycloalkane -9. Examples of alkanocycloalkane groups include 1,1,3,3-tetramethylcyclohexane and cyclohexylmethane.
[0024] "Alcanodiclolcanodiila" refers to a diradical of an alkanocycloalkane group. In certain embodiments, the alkanocycloalkanediyl group is C4-18 alkanocycloalkanodiyl, C4-16 alkanocycloalkanodiyl, C4-12 alkanocycloalkanediyl, C6-12 alkanocycloalkanediyl, C6-10 alkanocyclodiyl, and 6-6 alkanocyclodiyls in 6-6,. Examples of alkanocycloalkanediyl groups include 1,1,3,3-tetramethylcyclohexane-1,5-diyl and cyclohexylmethane-4,4'-diyl.
[0025] "Alcanoarene" refers to a hydrocarbon group having one or more aryl and / or arenodiyl groups and one or more alkyl and / or alkanodiyl groups, where aryl, arenodiyl, alkyl and alkanodiyl are defined herein. In certain embodiments, each aryl and / or arenodiyl group (s) is C6-12, C6-10, and in certain embodiments, phenyl or benzenodiyl. In certain embodiments, each alkyl and / or alkanediyl group (s) is C1-6, C1-4, C1-3, and in certain embodiments, methyl, methanodiyl, ethyl or ethane-1,2-diyl. In certain embodiments, the alkanoarene group is C4-18 alkanoarene, C4-16 alkanoarene, C4-12 alkanoarene, C4-8 alkanoarene, C6-12 alkanoarene, C6-10 alkanoarene, and in certain embodiments, C6-9 alkanoarene. Examples of alkanoarene groups include diphenyl methane.
[0026] "Alcanoarenodiila" refers to a diradical of an alkanoarene group. In certain embodiments, the alkanoarenodiyl group is C4-18 alkanoarenediyl, C416 alkanoarenediyl, C4-12 alkanoarenediyl, C4-8 alkanoarenediyl, C6-12 alkanoarenediyl, C6-10 alkanoarenediyl, and in certain C6-10 alkanoarenediyl. Examples of alkanoarenediyl groups include diphenyl methane-4,4'-diyl.
[0027] "Alkenyl" group refers to a group (R) 2C = C (R2). In certain embodiments, an alkenyl group has the structure -RC = C (R2) where the alkenyl group is a terminal group and is attached to a larger molecule. In such embodiments, each R can be selected, for example, from hydrogen and C1-3 alkyl. In certain embodiments, each R is hydrogen and an alkenyl group has the structure —CH = CH2.
[0028] "Alcoxy" refers to an -OR group where R is alkyl, as defined herein. Examples of alkoxy groups include methoxy, ethoxy, n-propoxy, isopropoxy, and n-butoxy. In certain embodiments, the alkoxy group is C1-8 alkoxy, C1-6 alkoxy, C1-4 alkoxy, and in certain embodiments, C1-3 alkoxy.
[0029] "Alkyl" refers to a monoradical of a straight or branched chain saturated acyclic hydrocarbon group having, for example, from 1 to 20 carbon atoms, from 1 to 10 carbon atoms, from 1 to 6 carbon atoms , from 1 to 4 carbon atoms, or from 1 to 3 carbon atoms. It will be appreciated that a branched alkyl has at least three carbon atoms. In certain embodiments, the alkyl group is C2-6 alkyl, C2-4 alkyl, and in certain embodiments, C2-3 alkyl. Examples of alkyl groups include methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, tert-butyl, n-hexyl, n-decyl, tetradecyl, and the like. In certain embodiments, the alkyl group is C2-6 alkyl, C2-4 alkyl and in certain embodiments, C2-3 alkyl. It will be appreciated that a branched alkyl has at least three carbon atoms.
[0030] "Arenodiila" refers to a monocyclic aromatic or polycyclic diradical group. Examples of arenodiyl groups include benzene-diyl and naphthalene-diyl. In certain embodiments, the group arenodiila is arenodiila C6-12, arenodiila C6-10, arenodiila C6-9, and in certain embodiments, benzene-diyl.
[0031] "Cycloalkanediyl" refers to a saturated monocyclic or polycyclic diradical hydrocarbon group. In certain embodiments, the cycloalkanodiyl group is C3-12 cycloalkanodiyl, C3-8 cycloalkanodiyl, C3-6 cycloalkanodiyl, and in certain embodiments, C5-6 cycloalkanodiyl. Examples of cycloalkanediyl groups include cyclohexane-1,4-diyl, cyclohexane-1,3-diyl, and cyclohexane-1,2-diyl.
[0032] "Cycloalkyl" refers to a monoradical saturated monocyclic or polycyclic hydrocarbon group. In certain embodiments, the cycloalkyl group is C3-12 cycloalkyl, C3-8 cycloalkyl, C3-6 cycloalkyl, and in certain embodiments, C5-6 cycloalkyl.
[0033] "Heteroalkanediyl" refers to an alkanodiyl group in which one or more of the carbon atoms are replaced with a heteroatom, such as N, O, S or P. In certain embodiments of heteroalkanodiyl, the heteroatom is selected from N and O.
[0034] "Heterocycloalkanediyl" refers to a cycloalkanodiyl group in which one or more of the carbon atoms are replaced with a heteroatom, such as N, O, S or P. In certain embodiments of heterocycloalkanodiyl, the heteroatom is selected from N and O.
[0035] "Heteroarenodiila" refers to a arenodiyl group in which one or more of the carbon atoms are replaced with a heteroatom, such as N, O, S or P. In certain embodiments of heteroarenodiila, the heteroatom is selected from N and O.
[0036] "Heterocycloalkanediyl" refers to a cycloalkanodiyl group, in which one or more of the carbon atoms are replaced with a heteroatom, such as N, O, S or P. In certain embodiments of heterocycloalkanediyl, the heteroatom is selected from N it's the.
[0037] A "Michael acceptor" refers to an activated alkene, such as an alkenyl group next to an electron extracting group, such as a ketone, nitro, halo, nitrile, carbonyl or nitro group. Michael's acceptors are well known in the state of the art. A "Michael acceptor group" refers to an activated alkenyl group and an electron extracting group. In certain embodiments, a Michael acceptor group is selected from vinyl ketone, vinyl sulfone, enamine, satinine, oxazolidine, and an acrylate. Other examples of Michael's acceptors are described in Mather et al., Prog. Polym. Sci. 2006, 31, 487-531, and include esters of acrylate, acrylonitrile, acrylamides, maleimides, alkyl methacrylates, cyanoacrylates. Other Michael acceptors include vinyl ketones, α, β-unsaturated aldehydes, vinyl phosphonates, acrylonitrile, vinyl pyridines, certain azo compounds, β-keto acetylenes, and acetylene esters. In certain embodiments, a Michael acceptor group is derived from a vinyl ketone and has the structure of Formula (2): - S (O) 2-C (R) 2 = CH2 (2)
[0038] where each R is independently selected from hydrogen, fluorine and C1-3 alkyl. In certain embodiments, each R is hydrogen. In certain embodiments, each R is hydrogen. In certain embodiments, a Michael acceptor or Michael-accepted group does not cover acrylates. A "compoundaceptor Michael" refers to a compound comprising at least one Michael acceptor. In certain embodiments, a Michael acceptor compound is divinyl sulfone, and a Michael acceptor group is vinylsulfonyl (S (O) 2 CH2 = CH2).
[0039] As used herein, "polymer" refers to oligomers, homopolymers and copolymers. Unless otherwise stated, molecular weights are numerical average molecular weights for polymeric materials indicated as "Mn" as determined, for example, by gel permeation chromatography, using a polystyrene standard recognized in the prior art.
[0040] "Substituted" refers to a group in which one or more hydrogen atoms are each independently substituted with the same or different substituent (s). In certain embodiments, the substituent is selected from halogen, -S (O) 2OH, -S (O) 2, -SH, —SR, where R is C1—6 alkyl, -COOH, -NO2, -NR2 where each R is independently selected from hydrogen and C1-3 alkyl, -CN, = O, C1-6 alkyl, -CF3, -OH, phenyl, C2-6 heteroalkyl, C5-6 heteroaryl, C1-6 alkoxy, and - COR, where R is C1-6 alkyl. In certain embodiments, the substituent is selected from -OH, -NH2, and C1-3 alkyl.
[0041] Reference is made to certain embodiments of sulfur-containing adducts, comprising terminal Michael acceptor groups, polymers, compositions, and methods. The described embodiments are not intended to restrict the claims. On the contrary, the claims are intended to cover all alternatives, modifications and equivalents. Sulfur Containing Adducts
The sulfur-containing adducts provided by the present invention comprise terminal Michael acceptor groups. Sulfur-containing polymers useful in the present invention include, for example, polyethers, polysulfides, and combinations thereof. Examples of suitable polyethers are described in U.S. Patent No. 6,123,179. Examples of suitable polysulfides are described in U.S. Patent No. 4,623,711. In certain embodiments, a sulfur-containing adduct may be difunctional, and in certain embodiments, it may have a functionality greater than 2, such as 3, 4, 5, or 6. A sulfur-containing adduct may comprise a mixture of sulfur-containing adducts having different functionalities, characterized by an average functionality of 2.05 to 6, from 2.1 to 4, from 2.1 to 3, from 2.2 to 2.8 and in certain embodiments, from 2.4 to 2.6 . Sulfur-containing adducts have at least two terminal Michael acceptor groups, and in certain embodiments, have two Michael acceptor groups, 3, 4, 5 or 6 Michael acceptor groups. A sulfur-containing adduct may comprise a combination of adducts having different numbers of Michael acceptor groups, characterized, for example, by an average Michael acceptor functionality of 2.05 to 6, from 2.1 to 4, from 2.1 to 3, from 2.2 to 2.8, and in certain embodiments, from 2.4 to 2.6.
[0043] In certain embodiments, a adduct containing sulfur comprises a adduct of polythioether characterized by a polythioether containing at least two terminal Michael acceptor groups.
[0044] In certain embodiments, a sulfur-containing adduct comprises a polyethylene adduct comprising:
[0045] (a) a main chain comprising the structure of Formula (1): - R1— [- S— (CH2) 2 — O— [- R2 — O—] m— (CH2) 2 — S — R1] n -(1)
[0046] where each R1 is independently selected from a C2-10 n-alkanodiyl group, from a branched C3-6 alkanodiyl group, a C6-8 cycloalkanodiyl group, a C6-10 alkanocycloalkanediyl group, a heterocyclic group, a group - [ (—CHR3—) p — X—] q— (CHR3) r—, where each R3 is independently selected from hydrogen and methyl; (ii) each R2 is independently selected from a C2-10 n-alkanodiyl group, a branched C3-6 alkanodiyl group, a C6-8 cycloalkanodiyl group, a C6-14 alkanocycloalkanediyl group, a heterocyclic group, and a - [(- CH2—) group p — X—] q— (CH2) r—; (iii) each X is independently selected from O, S and a group -NR6-, where R6 is selected from H and a methyl group; (iv) m ranges from 0 to 50; (v) n is an integer ranging from 1 to 60; (vi) p is an integer ranging from 2 to 6; (vii) q is an integer ranging from 1 to 5; and (viii) r is an integer ranging from 2 to 10; and (b) at least two terminal Michael acceptor groups.
[0047] In certain embodiments of a compound of Formula (1), R1 is - [- (CHR3) s — X—] q— (CHR3) r— where each X is independently selected from -O- and -S-. In certain embodiments, where R1 is - [- (CHR3) s — X—] q— (CHR3) r—, each X is - O- and in certain embodiments, each X is -S-.
[0048] In certain embodiments of a compound of Formula (1), R1 is - [- (CH2) s — X—] q— (CH2) r—, where each X is independently selected from -O- and -S- . In certain embodiments, where R1 is - [- (CH2) s — X—] q— (CH2) r—, each X is -O- and in certain embodiments, each X is -S-.
[0049] In certain embodiments, R1 in Formula (3a) is - [(- CH2—) p — X—] q— (CH2) r—, where p is 2, X is O, q is 2, r is 2 , R2 is ethanediyl, m is 2, and n is 9.
[0050] Michael's accepting groups are well known in the state of the art. In certain embodiments, a Michael acceptor group comprises an activated alkene, such as an alkenyl group next to an electron extracting group, such as enone, nitro, halo, nitrile, carbonyl, or nitro group. In certain embodiments, a Michael acceptor group is selected from a vinyl ketone, vinyl sulfone, quinone, enamine, satin, aldimine and an oxazolidine. In certain embodiments, each of Michael's accepting groups may be the same, and in certain embodiments, at least some of Michael's accepting groups are different.
[0051] In certain embodiments, a Michael acceptor group is derived from vinyl sulfone, and has the structure of Formula (2): - CH2 — C (R4) 2 — S (O) 2 — C (R4) 2 = CH2 (two)
[0052] where each R4 is independently selected from hydrogen and C1-3 alkyl. In certain embodiments of Formula 2, each R4 is hydrogen.
[0053] In certain embodiments, where the sulfur-containing adduct comprises a polyethylene adduct, the polyether ether adduct is selected from a Formula (3) polyethylene adduct, a Formula (3a) polyethylene adduct and a combination thereof: R6 — S — R1— [—S— (CH2) p — O— (R2 — O) m— (CH2) 2 — S — R1—] n — S — R6 (3) {R6 — S — R1— [ —S— (CH2) p — O— (R2 — O) m— (CH2) 2 — S — R1—] n — S — V '-} zB (3a)
[0054] where each R1 is independently selected from C2-10 alkanediyl, C6-8 cycloalkanodiyl, C6-10 alkanocycloalkodiyl, C5-8 heterocycloalkanediyl, and - [(—CHR3—) s — X—] q - (- CHR3—) r—, Where:
[0055] septirenumber2a6;
[0056] which is a whole number from 1 to 5;
[0057] whole number from 2 to 10;
[0058] each R3 is independently selected from hydrogen and methyl; and
[0059] each X is independently selected from -O-, -S-, and -NHR-, where R is selected from hydrogen and methyl;
[0060] each R2 is independently selected from C1-10 alkanodiyl, C6-8 cycloalkanodiyl, C6-14 alkanocycloalkanodiyl, and - [(- CHR3—) s — X—] q - (- CHR3—) r—, where s, q, r, R3, and X are as defined for R1;
[0061] a total number of 0 to 50;
[0062] ninety-one number from 1 to 60;
[0063] foot one whole number from 2 to 6;
[0064] Bre represents a nucleus of a polyfunctionalizing agent with vinyl ending z-valente B (-V) z, where:
[0065] z is an integer from 3 to 6; and
[0066] each V is a group comprising a terminal vinyl group; and
[0067] each -V'- is derived from the reaction of -V with a thiol; and
[0068] each R6 is independently a portion comprising a Michael terminal acceptor group.
[0069] In certain embodiments of Formula (3) and Formula (3a), R1 is - [(- CH2—) p — X—] q— (CH2) r—, where p is 2, X is —O— , q is 2, r is 2, R2 is ethanediyl, m is 2, and n is 9.
[0070] In certain embodiments of Formula (3) and Formula (3a), R1 is selected from C2-6 alkanodiyl and - (CHR3) s — X—] q— (CHR3) r—.
[0071] In certain embodiments of Formula (3) and Formula (3a), R1 is - [- (CHR3) s — X—] q— (CHR3) r—, and in certain embodiments X is -O- and in certain embodiments embodiments, X is -S-.
[0072] In certain embodiments of Formula (3) and Formula (3a), where R1 is - [- (CHR3) s — X—] q— (CHR3) r—, p is 2, r is 2, q is 1, and X is -S-; in certain embodiments where p is 2, q is 2, r is 2, and X is -O-; and in certain embodiments, p is 2, r is 2, q is 1, and X is -O-.
[0073] In certain embodiments of Formula (3) and Formula (3a), where R1 is - [- (CHR3) s — X—] q— (CHR3) r—, each R3 is hydrogen and, in certain embodiments, at least one R3 is methyl.
[0074] In certain embodiments of Formula (3) and Formula (3a) adducts, each R1 is the same and, in certain embodiments, at least one R1 is different.
[0075] In certain embodiments of Formula (3) and Formula (3a) adducts, each R6 is independently selected from a vinyl ketone, vinyl sulfone, quinone, enamine, satin, aldimine and an oxazolidine. In certain embodiments, each of Michael's accepting groups may be the same, and in certain embodiments, at least some of Michael's accepting groups are different.
[0076] In certain embodiments of Formula (3) and Formula (3a) adducts, each R6 is independently derived from a vinyl sulfone and has the Formula (2) structure: —CH2 — C (R4) 2 — S ( O) 2 — C (R4) 2 = CH2 (2)
[0077] where each R4 is independently selected from hydrogen and C1-3 alkyl. In certain embodiments of compounds of Formula (3) and Formula (3a), where each R6 is a portion of Formula (2), each R4 is hydrogen.
[0078] In certain embodiments, a sulfur-containing adduct comprises a polysulfide adduct comprising at least two terminal Michael acceptor groups.
[0079] As used herein, the term polysulfide refers to a polymer that contains one or more disulfide bonds, that is, bonds - [S-S] -, in the main polymer chain and / or in the pending positions in the polymer chain. In certain embodiments, the polysulfide polymer will have two or more sulfur-sulfur bonds. Suitable polysulfides are available on the market, and are supplied by Akzo Nobel and Toray Fine Chemicals under the names Thiolol-LP and Thioplast®. Thioplast® products are available in a wide range of molecular weights, for example, from less than 1,100 to more than 8,000, with the molecular weight being the average molecular weight in grams per mol. In some cases, the polysulfide has a numerical average molecular weight of 1,000 to 4,000. The crosslink density of these products also varies, depending on the amount of crosslinking agent used. The content of -SH, that is, the content of thiol or mercaptan, of these products can also vary. The content of mercaptan and the molecular weight of the polysulfide can affect the rate of cure of the polymer, with the rate of cure increasing with the molecular weight.
[0080] In certain embodiments provided by the present invention, a polysulfide composition comprises: (a) from 90 mole percent to 25 mole percent of mercaptan-terminated disulfide polymer of Formula HS (RSS) mR-SH; and (b) from 10 mole percent to 75 mole percent of diethyl formal mercaptan-terminated polysulfide polymer of Formula HS (RSS) nR-SH, where R is -C2H4-O-CH2-O-C2H4-; R is a divalent member selected from alkyl of 2 to 12 carbon atoms, alkyl thioether of 4 to 20 carbon atoms, alkyl ether of 4 to 20 carbon atoms and an oxygen atom, alkyl ether of 4 to 20 carbon atoms and from 2 to 4 oxygen atoms, each separated by at least 2 carbon atoms, alicyclic from 6 to 12 carbon atoms, and aromatic lower alkyl; and the value of m and n is such that the mercaptan-terminated diethyl formal polysulfide polymer and the mercaptan-terminated disulfide polymer have an average molecular weight of 1,000 Daltons to 4,000 Daltons, such as 1,000 Daltons to 2,500 Daltons. Such polymeric mixtures are described in U.S. Patent No. 4,623,711, column 4, line 18 to column 8, line 35, the part cited herein being incorporated by reference into the present invention. In some cases, R in the above formula is -CH2-CH2-; -C2H4-O-C2H4-; -C2H4-S-C2H4-; -C2H4-O-C2H4-O-C2H4-; or -CH2-C6H4-CH2-.
[0081] In certain embodiments, a sulfur-containing adduct comprises a polythioether adduct comprising at least two terminal Michael acceptor groups, a polysulfide adduct comprising at least two terminal Michael acceptor groups, or a combination thereof.
[0082] In certain embodiments, the sulfur-containing Michael acceptor adducts provided by the present invention comprise reagent reaction products comprising: (a) a sulfur-containing polymer; and (b) a compound containing a Michael acceptor group and a group that is reactive with a terminal group of the sulfur-containing polymer.
[0083] In certain embodiments, the sulfur-containing polymer is selected from a polythioether and a polysulfide, and a combination thereof. In certain embodiments, a sulfur-containing polymer comprises a polythioether and, in certain embodiments, a sulfur-containing polymer comprises a polysulfide. A sulfur-containing polymer can comprise a mixture of different polyethers and / or polysulfides and the polythioethers and / or polysulfides can have the same or different functionality. In certain embodiments, a sulfur-containing polymer has an average functionality of 2 to 6, of 2 to 4, of 2 to 3, and in certain embodiments, of 2.05 to 2.5. For example, a sulfur-containing polymer can be selected from a difunctional sulfur-containing polymer, a trifunctional sulfur-containing polymer, and a combination thereof.
[0084] In certain embodiments, a sulfur-containing polymer is terminated with a group that is reactive with the terminal reactive group of the compound (b). In certain embodiments, the compound containing a Michael acceptor group has two Michael acceptor groups, and the terminal groups of the sulfur-containing polymer are reactive with Michael acceptor groups, such as a thiol group. A sulfur-containing polymer can comprise terminal thiol groups, terminal alkenyl groups or terminal epoxy groups.
[0085] In certain embodiments, a sulfur-containing polymer is thiol-terminated. Examples of polythioethers with thiol functionality are described, for example, in U.S. Patent No. 6,172,179. In certain embodiments, a polythioether with thiol functionality comprises Permapol®P3.1E, from PRC-DeSoto International Inc., Sylmar, CA.
[0086] In certain embodiments, a sulfur-containing polymer comprises a polythioether comprising:
[0087] (a) a main chain comprising the structure of Formula (1): - R1— [—S— (CH2) 2 — O— [- R2 — O—] m— (CH2) 2 — S — R1] n -(1)
[0088] where:
[0089] (i) each R1 is independently selected from a C2-10 n-alkanodiyl group, a C3-6 branched alkanodiyl group, a C6-8 cycloalkanodiyl group, a C6-10 alkanocycloalkany group, a heterocyclic group, a heterocyclic group - [(- CHR3—) p — X—] q— (CHR3) r—, where each R3 is independently selected from hydrogen and methyl;
[0090] (ii) each R2 is independently selected from a C2-10 n-alkanodiyl group, a branched C3-6 alkanodiyl group, a C6-8 cycloalkanodiyl group, a C6-14 alkanocycloalkanediyl group, a heterocyclic group, and a group - [(- CH2—) p — X—] q— (CH2) r—;
[0091] (iii) each X is independently selected from O, S and a group -NR6-, where R6 is selected from H and a methyl group;
[0092] (iv) m ranges from 0 to 50;
[0093] (v) n is an integer ranging from 1 to 60;
[0094] (vi) p is an integer ranging from 2 to 6;
[0095] (vii) q is an integer ranging from 1 to 5; and
[0096] (viii) r is an integer ranging from 2 to 10.
[0097] In certain embodiments, a sulfur-containing polymer comprises a polythioether selected from a Formula (4) polythioether, a Formula (4a) polythioether and a combination thereof: HS — R1— [- S— (CH2) p— O— (R2 — O) m— (CH2) 2 — S — R1—] n — SH (4) {HS — R1— [—S— (CH2) p — O— (R2 — O) m— (CH2 ) 2 — S — R1—] n — S — V '-} zB (4a)
[0098] where:
[0099] each R1 is independently selected from C2-10 alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanocycloalkanodiyl, C5-8 heterocycloalkanediyl, and - [(—CHR3—) s — X—] q - (- CHR3—) r—, where:
[0100] ninth number from 2 to 6;
[0101] which is a whole number from 1 to 5;
[0102] whole number from 2 to 10;
[0103] each R3 is one independently selected from hydrogen and methyl; and
[0104] each X is independently selected from -O-, -S-, and -NHR-, where R is selected from hydrogen and methyl;
[0105] each R2 is independently selected from C1-10 alkanediyl, C6-8 cycloalkanodiyl, C6-14 alkanocycloalkanodiyl and - [(- CHR3—) s — X—] q - (- CHR3—) r—, where s, q, r , R3, and X are as defined as for R1;
[0106] a total number of 0 to 50;
[0107] ninety-one-number from 1 to 60;
[0108] foot a whole number from 2 to 6;
[0109] Bre represents a core of a polyfunctionalizing agent with vinyl ending z-valente B (-V) z, where:
[0110] z is an integer from 3 to 6; and
[0111] each V is a group comprising a terminal vinyl group; and
[0112] each -V'- is derived from the reaction of -V with a thiol.
[0113] In certain embodiments, in Formula (4) and Formula (4a), R1 is - [(—CH2—) p — X—] q— (CH2) r—, where p is 2, X is —O -, q is 2, r is 2, R2 is ethanediyl, m is 2, and n is 9.
[0114] In certain embodiments of Formula (4) and Formula (4a), R1 is selected from C2-6 alkanodiyl and from - [- (CHR3) s — X—] q— (CHR3) r—.
[0115] In certain embodiments of Formula (4) and Formula (4a), R1 is - [- (CHR3) s — X—] q— (CHR3) r— and in certain embodiments, X is -O- and in certain embodiments, X is -S-.
[0116] In certain embodiments of Formula (4) and Formula (4a), where R1 is - [- (CHR3) s — X—] q— (CHR3) r—, p is 2, r is 2, q is 1, and X is -S-; in certain embodiments where p is 2, q is 2, r is 2, and X is -O-; and in certain embodiments, p is 2, r is 2, q is 1, and X is -O-.
[0117] In certain embodiments of Formula (4) and Formula (4a), where R1 is - [- (CHR3) s — X—] q— (CHR3) r—, each R3 is hydrogen and, in certain embodiments, at least one R3 is methyl.
[0118] In certain embodiments of Formula (4) and Formula (4a), each R1 is the same and, in certain embodiments, at least one R1 is different.
[0119] Various methods can be used to prepare such polyethers. Examples of appropriate thio-functional polyethers and methods for their production are described in U.S. Patent No. 6,172,179, column 2, row 29 to column 4, row 22; column 6, line 39 to column 10, line 50; and column 11, lines 65 to column 12, line 22, the portions of which are hereby incorporated by reference in their entirety. Such polythioethers with thiol functionality may be difunctional, that is, linear polymers having two terminal or polyfunctional thiol groups, that is, branched polymers that have three or more terminal thiol groups. Such polythioethers with thiol functionality are commercially available, for example, as Permapol®P3.1E from PRC-DeSoto International, Inc., Sylmar, CA.
[0120] Appropriate polythioethers with thiol functionality can be produced by reacting a divinyl ether or mixtures of divinyl ethers with excess dithiol or a mixture of dithiol. For example, dithols suitable for use in the preparation of polyethers with thiol functionality include those having Formula (5), other dithols described herein, or combinations of any of the dithols described herein.
[0121] In certain embodiments, a dithiol has the structure of Formula (5): HS-R1-SH (5)
[0122] where:
[0123] R1 is selected from C2-6 alkanediyl, C6-8 cycloalkanodiyl, C6-10 alkanocycloalkanediyl, C5—8 heterocycloalkanediyl, and - [- (CHR3) s — X—] q— (CHR3) r—;
[0124] where:
[0125] each R3 is independently selected from hydrogen and methyl;
[0126] each X is independently selected from -O-, -S- and -NR-, where R is selected from hydrogen and methyl;
[0127] sine integer from 2 to 6;
[0128] which is a whole number from 1 to 5; and
[0129] whole number from 2 to 10.
[0130] In certain embodiments of a Formula (5) dithiol, R1 is - [- (CHR3) s — X—] q— (CHR3) r—.
[0131] In certain embodiments of a compound of Formula (5), X is selected from -O- and -S- and so - [- (CHR3) s — X—] q— (CHR3) r— in Formula (5 ) is - [(- CHR3—) p — O—] q— (CHR3) r— or - [(- CHR32—) p — S—] q— (CHR3) r—. In certain embodiments, p and r are the same, such as when p and r are both two.
[0132] In certain embodiments of a Formula (5) dithiol, R1 is selected from C2-6 alkanediyl and - [- (CHR3) s — X—] q— (CHR3) r—.
[0133] In certain embodiments, R1 is - [- (CHR3) s — X—] q— (CHR3) r, and in certain embodiments X is -O- and in certain embodiments, X is -S-.
[0134] In certain embodiments, when R1 is - [- (CHR3) s — X—] q— (CHR3) r—, p is 2, r is 2, q is 1, and X is -S-; in certain embodiments, when p is 2, q is 2, r is 2, and X is -O-; and in certain embodiments, p is 2, r is 2, q is 1, and X is -O-.
[0135] In certain embodiments, when R1 is - [- (CHR3) s — X—] q— (CHR3) r—, each R3 is hydrogen and, in certain embodiments, at least one R3 is methyl.
[0136] Examples of suitable dithols include, for example, 1,2-ethanedithiol, 1,2-propanedithiol, 1,3-propanedithiol, 1,3-butanedithiol, 1,4-butanedithiol, 2,3-butanedithiol, 1, 3-pentanedithiol, 1,5-pentanedithiol, 1,6-hexanedithiol, 1,3-dimercapto-3-methylbutane, dipenthenedimercaptan, ethylcyclohexyldithiol (ECHDT), dimercaptodiethylsulfide, methyl substituted dimercaptodiethylsulfan, dimercaptodiethylsulfene, dimercaptodiethylsulfety -dimercapto-3-oxapentane, and a combination of any of the aforementioned. A polythiol may have one or more pendant groups selected from a lower alkyl group (eg, C1-6), a lower alkoxy group, and a hydroxyl group. Suitable pendant alkyl groups include, for example, linear C1-6 alkyl, branched C3-6 alkyl, cyclopentyl, and cyclohexyl.
[0137] Other examples of suitable dithols include dimercaptodiethylsulfide (DMDS) (in Formula (5), R1 is - [(- CH2—) p — X—] q— (CH2) r—, where p is 2, r is 2 , q is 1, and X is —S—); dimercaptodioxaoctane (DMDO) (in Formula (5), R1 is - [(- CH2—) p — X—] q— (CH2) r—, where p is 2, q is 2, r is 2, eX is —O—); and 1,5-dimercapto-3-oxapentane (in Formula (5), R1 is - [(- CH2—) p — X—] q— (CH2) r—, where p is 2, r is 2, q is 1, eXé -O-). It is also possible to use dithiols that include both hetero atoms in the main carbon chain and pendant alkyl groups, such as methyl groups. Such compounds include, for example, methyl substituted DMDS, such as HS — CH2CH (CH3) - S — CH2CH2 — SH, HS — CH (CH3) CH2 — S — CH2CH2 — SH and dimethyl substituted DMDS, such as HS— CH2CH (CH3) —S — CHCH3CH2 — SH and HS — CH (CH3) CH2— S — CH2CH (CH3) —SH.
[0138] Divinyl ethers suitable for preparing polyethers and polyether ethers add, for example, divinyl ethers of Formula (6): CH2 = CH — O - (- R2 — O—) m — CH = CH2 (6)
[0139] where R2 in Formula (6) is selected from a C2-6 n-alkanodiyl group, a C6-8 cycloalkanodiyl group, a C6-10 alkanocycloalkanediyl group, and - [(- CH2—) p — O—] q - (- CH2—) r—, where p is an integer ranging from 2 to 6, q is an integer from 1 to 5, and r is an integer from 2 to 10. In certain embodiments of a divinyl ether of Formula (6), R2 is a C2-6 n-alkanodiyl group, a branched C3-6 alkanodiyl group, a C6-8 cycloalkanodiyl group, a C6-10 alkanocycloalkanediyl group, and in certain embodiments, - [(- CH2—) p —O—] q - (- CH2—) r—.
Suitable divinyl ethers include, for example, compounds containing at least one oxyalkanediyl group, such as from 1 to 4 oxyalkanediyl groups, that is, compounds in which m in Formula (6) is an integer ranging from 1 to 4. In certain embodiments, m in Formula (6) is an integer ranging from 2 to 4. It is also possible to employ mixtures of divinyl ether available on the market that are characterized by a non-integral mean value for the number of oxyalkanediyl units per molecule. Thus, m in formula (6) can also assume values of rational number ranging from 0 to 10.0, such as from 1.0 to 10.0, from 1.0 to 4.0, or from 2.0 to 4 , 0.
[0141] Examples of suitable divinyl ethers include, for example, divinyl ether, ethylene glycol divinyl ether (EG-DVE) (R2 in Formula (6) is ethanediyl in is 1), butanediol divinyl ether (BD-DVE) (R2 in Formula (6) is butanediyl in is 1), hexanediol divinyl ether (HD-DVE) (R2 in Formula (6) is hexanediyl in is 1), diethylene glycol divinyl ether (DEG-DVE) (R2 in Formula (5) is ethanediyl in é 2), triethylene glycol divinyl ether (R2 in Formula (14) is ethanediyl in é 3), tetraethylene glycol divinyl ether (R2 in Formula (6) is ethanediyl in é 4), cyclohexanedimethanol divinyl ether, polytetrahydrofuryl divinyl ether; trivinyl ether monomers, such as trivethyl ether trimethylolpropane; tetrafunctional ether monomers, such as pentaerythritol tetravinyl ether; and combinations of two or more of such polyvinyl ether monomers. A polyvinyl ether can have one or more pendant groups, selected from alkyl groups, hydroxyl groups, alkoxy groups, and amine groups.
[0142] In certain embodiments, divinyl ethers in which R2 in Formula (6) is branched C3-6 alkanediyl, can be prepared by reacting a polyhydroxy compound with acetylene. Examples of divinyl ethers of this type include compounds in which R2 in Formula (6) is an alkyl substituted methanodiyl group, such as -CH (CH3) - (for example mixtures of Pluriol®, such as divinyl ether Pluriol®E-200 (BASF Corp., Parsippany, DJ), for which R2 in Formula (6) is ethanediyl and is 3.8) or an alkyl substituted ethanediyl (for example, -CH2CH (CH3) -, such as DPE polymeric mixtures , including DPE-2 and DPE-3 (International Specialty Products, Wayne, NJ).
[0143] Other useful divinyl ethers include compounds in which R2 in Formula (6) is polytetrahydrofuryl (poly-THF) or polyoxyalkanediyl, such as those having an average of approximately 3 monomer units.
[0144] Two or more types of polyvinyl ether monomers of Formula (6) may be used. Thus, in certain embodiments, two Formula (5) dithiols and a Formula (6) polyvinyl ether monomer, a Formula (5) dithiol and two Formula (6) polyvinyl ether monomers, two Formula (5) dithiols ) and two divinyl ether monomers of Formula (6) and more than two compounds of one or both of Formula (5) and Formula (6), can be used to produce a variety of polythioethers with thiol functionality.
[0145] In certain embodiments, a polyvinyl ether monomer comprises from 20 to less than 50 mole percent of the reagents used in the preparation of a thiol-functional polythether and, in certain embodiments, from 30 to less than 50 mole percent.
[0146] In certain embodiments provided by the present invention, relative amounts of dithiols and divinyl ethers are selected to produce polyethers having terminal thiol groups. Thus, a dithiol of Formula (5) or a mixture of at least two different dithols of Formula (5) are reacted with a divinyl ether of Formula (6) or a mixture of at least two different divinyl ethers of Formula (6) in relative amounts, so that the molar ratio of thiol groups to vinyl groups is greater than 1: 1, such as 1: 1 to 2.0: 1.0.
[0147] The reaction between the compounds of dithiols and divinyl ethers can be catalyzed by a free radical catalyst. Free radical catalysts include, for example, azo compounds, for example, azobisnitriles, such as azo (bis) isobutyronitrile (AIBN); organic peroxides, such as benzoyl peroxide and t-butyl peroxide; and inorganic peroxides, such as hydrogen peroxide. The catalyst can be a free radical catalyst, an ionic catalyst, or ultraviolet radiation. In certain embodiments, the catalyst does not comprise acidic or basic compounds, and does not produce acidic or basic compounds on decomposition. Examples of free radical catalysts include azo catalyst, such as Vazo®-57 (DuPont), Vazo®-64 (DuPont), Vazo®-67 (DuPont), V-70® (Wako Specialty Chemicals) and V-65B ® (Wako Specialty Chemicals). Examples of other free radical catalysts are alkyl peroxides, such as t-butyl peroxide. The reaction can also be carried out by irradiation with ultraviolet light, with or without a photoinitiating cationic portion.
[0148] Polythioethers with thiol functionality provided by the present invention can be prepared by combining at least one compound of Formula (5) and at least one compound of Formula (6) followed by addition of an appropriate catalyst and conducting the reaction at a temperature from 30 ° C to 120 ° C, such as 70 ° C to 90 ° C, for a period of 2 to 4 hours, such as 2 to 6 hours.
[0149] As described herein, thiol-terminated polyethers may comprise a polyfunctional polythioether, that is, they may have an average functionality greater than 2.0. Suitable polyfunctional polyethers with thiol termination include, for example, those having the structure of Formula (7): B (-A-SH) z (7)
[0150] where: (i) A comprises, for example, a structure of Formula (1), (ii) B denotes a z-valent residue of a polyfunctionalizing agent; and (iii) z has an average value greater than 2.0, and, in certain embodiments, a value between 2 and 3, a value between 2 and 4, a value between 3 and 6, and in certain embodiments, it is a number integer from 3 to 6.
[0151] Polyfunctionalizing agents suitable for use in the preparation of such polyfunctional polymers with thiol functionality include trifunctionalizing agents, that is, compounds where z is 3. Suitable trifunctionalizing agents include, for example, trialyl cyanurate (TAC), 1,2,3- propanotritiol, isocyanurate-containing tritiols and combinations thereof, as described in American publication No. 2010/0010133 in paragraphs [0102] - [0105], the part of which is incorporated herein by reference. Other useful polyfunctionalizing agents include trimethylolpropane, trivinyl ether, and the polythiols described in U.S. Pat. 4,366,307; 4,609,762; and 5,225,472. Mixtures of polyfunctionalizing agents can also be used.
[0152] As a result, polythioethers with thiol functionality suitable for use in embodiments provided by the present description may have a wide range of medium functionality. For example, trifunctionalizing agents can provide average functionality from 2.05 to 3.0, such as from 2.1 to 2.6. Wider ranges of medium functionality can be obtained using tetrafunctional polyfunctionalizing agents or with greater functionality. Functionality can also be affected by factors, such as stoichiometry, as will be understood in the state of the art.
[0153] Polythioethers with thiol functionality with a functionality greater than 2.0 can be prepared in a similar way to the difunctional polythioethers with thiol functionality, described in American publication No. 2010/0010133. In certain embodiments, polyethers can be prepared by combining (i) one or more dithiols described herein, with (ii) one or more divinyl ethers described herein, and (iii) one or more polyfunctionalizing agents. The mixture can then be reacted, optionally in the presence of an appropriate catalyst, to give a polythioether with thiol functionality having a functionality greater than 2.0.
[0154] Thus, in certain embodiments, a thiol-terminated polythether comprises the reaction product of reagents comprising:
[0155] (a) a dithiol of Formula (5): HS-R1-SH (5)
[0156] where:
[0157] R1 is selected from C2-6 alkanediyl, C6-8 cycloalkanodiyl, C6-10 alkanocycloalkanediyl, C5-8 heterocycloalkanediyl, and - [- (CHR3) s — X—] q— (CHR3) r— where:
[0158] each R3 is independently selected from hydrogen and methyl;
[0159] each X is independently selected from -O-, -S- - NH- and -NR-, where R is selected from hydrogen and methyl;
[0160] ninth number from 2 to 6;
[0161] any number from 1 to 5; and
[0162] whole number from 2 to 10; and
[0163] (b) a divinylether of Formula (6): CH2 = CH-O - (- R2-O-) m-CH = CH2 (6)
[0164] where each R2 is independently selected from a C1-10 n-alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanocycloalkanediyl, and - [(- CHR3 -) - X-] q - (- CHR3-) r-, where s , q, r, R3 and X are as defined above;
[0165] a total number of 0 to 50;
[0166] ninety-one-number from 1 to 60; and
[0167] foot a whole number from 2 to 6.
[0168] And, in certain embodiments, the reagents comprise (c) a polyfunctional compound, such as a polyfunctional compound B (-V) z, where B, V- and z are as defined herein.
[0169] Thiol-terminated polyethers provided by the present invention represent thiol-terminated polyethers having a molecular weight distribution. In certain embodiments, useful thiol-terminated polyethers may exhibit a numerical average molecular weight ranging from 500 Daltons to 20,000 Daltons, in certain embodiments, from 2,000 Daltons to 5,000 Daltons, and in certain embodiments, from 3,000 Daltons to 4,000 Daltons. In certain embodiments, useful thiol-terminated polyethers exhibit a polydispersity (Mw / Mn; weight average molecular weight / numerical average molecular weight) ranging from 1 to 20, and in certain embodiments, from 1 to 5. The molecular weight distribution of polyethers thiol-terminated can be characterized by gel permeation chromatography.
[0170] In certain embodiments, the thiol-terminated polyethers provided by the present description are essentially free or free of sulfone, ester and / or disulfide bonds. As used herein, the term "essentially free of sulfone, ester and / or disulfide bonds" means that less than 2 moles percent of the bonds in the thiol-functional polymer are sulfone, ester and / or disulfide bonds. As a result, in certain embodiments, the resulting thiol-functional polyethers are also essentially free or free of sulfone, ester4 and / or disulfide bonds.
[0171] To prepare a sulfur-containing Michael acceptor adduct, a sulfur-containing polymer, such as those described herein, can be reacted with (b) a compound containing a group that is reactive with the terminal groups of the sulfur-containing polymer and a Michael's accepting group.
[0172] In certain embodiments, a Michael acceptor group is selected from a vinyl ketone, vinyl sulfone, quinone, enamine, satin, aldimine, and an oxazolidine. In certain embodiments, a Michael acceptor group is a vinyl ketone, and in certain embodiments, a vinyl sulfone, such as divinyl sulfone. In embodiments in which the compound containing a Michael acceptor group is divinyl sulfone, the sulfur-containing polymer may be thiol terminated, such as a thiol terminated polythioether, a thiol terminated polysulfide, or a combination of the same.
[0173] The reaction between a sulfur-containing polymer and a compound containing a Michael acceptor group and a group that is reactive with a sulfur-containing polymer end group can be conducted in the presence of an appropriate catalyst.
[0174] In certain embodiments, the compositions provided by the present invention comprise a catalyst, such as an amine catalyst. For example, in embodiments in which the sulfur-containing polymer has a thiol termination and the compound is a difunctional Michael acceptor, the reaction can take place in the presence of an amine catalyst. Examples of suitable amine catalysts include, for example, triethylenediamine (1,4-diazabicyclo [2.2.2] octane, DABCO), dimethylcyclohexylamine (DMCHA), dimethylethanolamine (DMEA), bis- (2-dimethylaminoethyl) ether, N-ethylmorpholine , triethylamine, 1,8-diazabicyclo [5.4.0] undecene-7 (DBU), pentamethyldiethylenetriamine (PMDETA), benzildimethylamine (BDMA), N, N, N'-trimethyl-N'-hydroxyethyl-bis (aminoethyl) ether, and N '- (3-dimethylamino) propyl) -N, N-dimethyl-1,3-propanediamine. Compositions
[0175] Michael's chemical addition agents can be employed in a variety of forms along with sulfur-containing polymers to provide curable compositions. For example, a curable composition provided by the present invention can comprise (a) a sulfur-containing polymer and a Michael acceptor curing agent; (b) a sulfur-containing Michael acceptor adduct and a curing agent comprising at least two terminal groups that are reactive with Michael acceptor groups; or (c) a sulfur-containing polymer and a curing agent comprising a combination of a monomeric Michael acceptor and a monomeric Michael acceptor adduct. Sulfur-containing polymer and Michael's acceptor curing agent
[0176] In certain embodiments, the compositions provided by the present invention comprise a sulfur-containing polymer and a Michael acceptor curing agent. A sulfur-containing polymer can be a polythioether or combination of polyethers having reactive end groups with Michael's acceptor; a polysulfide or combination of polysulfides having terminal groups reactive with the Michael acceptor; or a combination of any of the above. In certain embodiments, a sulfur-containing polymer is thiol-terminated. In such embodiments, a Michael acceptor will be polyfunctional and will have Michael acceptor groups reactive with the sulfur-containing polymer end groups.
[0177] In certain embodiments, a sulfur-containing polymer comprises a thiol-terminated polythioether, including any of the thiol-terminated polyethers described herein, such as a thiol-terminated polythioether of Formula (1). In certain embodiments, a sulfur-containing polymer comprises a thiol-terminated polythioether, such as a thiol-terminated polythioether of Formula (4), Formula (4a) or a combination thereof. In certain embodiments, a sulfur-containing polymer is selected from a sulfur-containing difunctional polymer, a trifunctional-containing polymer and a combination thereof. In certain embodiments, a thiol-terminated polymer comprises a mixture of sulfur-containing polymers having an average functionality of 2 to 3, and in certain embodiments, from 2.2 to 2.8. In certain embodiments, a thiol-terminated polythether comprises Permapol® 3.1E, from PRC-DeSoto International.
[0178] A polyfunctional Michael acceptor has at least two groups of Michael acceptors. A polyfunctional Michael acceptor may have an average Michael acceptor functionality of 2 to 6, 2 to 4, 2 to 3, and in certain embodiments, 2.05 to 2.5. In certain embodiments, a polyfunctional Michael acceptor is difunctional, such as divinyl ketone and divinyl sulfone. A Michael acceptor having a functionality greater than two can be prepared by reacting a compound containing a Michael acceptor group and a reactive group with terminal groups of a polyfunctionalizing agent, such as those described herein, using appropriate reaction conditions.
[0179] In certain embodiments, when Michael's acceptor is used as a curing agent, the molecular weight of Michael's acceptor is less than 600 Daltons, less than 400 Daltons, and in certain embodiments, less than 200 Daltons.
[0180] In certain embodiments, a Michael acceptor comprises from about 0.5% by weight to about 20% by weight of the composition, from about 1% by weight to about 10% by weight, from about 2 % by weight to about 8% by weight, from about 2% by weight to about 6% by weight and, in certain embodiments, from about 3% by weight to about 5% by weight, where the percentage in weight is based on the total dry solids weight of the composition. Michael's acceptor adduct containing sulfur and a curing agent
[0181] In certain embodiments, a composition comprises a sulfur-containing Michael acceptor adduct provided by the present invention and a sulfur-containing polymeric curing agent.
[0182] In these compositions, a sulfur-containing adduct comprises any of the adducts described herein. In certain embodiments, a sulfur-containing adduct comprises a polyether ether adduct, and in certain embodiments, a polyether ether adduct has an average functionality of 2 to 3, from 2.2 to 2.8, and in certain embodiments, from 2.4 to 2.6. In certain embodiments, a sulfur-containing adduct has an average functionality of 2.
[0183] In certain embodiments, a sulfur-containing Michael acceptor adduct comprises a compound of Formula (3), Formula (3a) or a combination thereof, and the sulfur-containing polymeric curing agent comprises a polythioether of Formula (4), Formula (4a) or a combination thereof. In certain embodiments, the sulfur-containing adduct comprises the Michael acceptor adduct from Permapol® 3.1E. In certain embodiments, the sulfur-containing polymeric curing agent comprises Permapol® 3.1E.
[0184] In certain embodiments, a sulfur-containing Michael acceptor adduct comprises a compound of Formula (3), Formula (3a) or a combination thereof and the sulfur-containing polymeric curing agent comprises a polysulfide. In certain embodiments, the sulfur-containing adduct comprises the Michael acceptor adduct from Permapol® 3.1E. In certain embodiments, the sulfur-containing polymer comprises a polysulfide selected from a Thiokol-LP® polysulfide, a Thioplast® polysulfide and a combination thereof.
[0185] In these compositions, the Michael acceptor groups of the adduct are reactive with the terminal groups of the sulfur-containing polymer. For example, the Michael acceptor groups can be activated alkenyl groups, for example, Michael acceptor groups, and the sulfur-containing polymer comprises terminal thiol groups.
[0186] A sulfur-containing polymer used as a curing agent comprises at least two terminal groups reactive with Michael's acceptor groups. A sulfur-containing polymer used as a curing agent in such compositions may comprise a polyetherether including any of those described herein, a polysulfide including any of those described herein or a combination thereof. The sulfur-containing polymer can have an average functionality of about 2 or any functionality of about 2 and about 6, such as from about 2 to about 4, or from about 2 to about 3.
[0187] In certain embodiments, the sulfur-containing polymeric curing agent comprises a thiol-terminated polyether, such as, for example, Permapol® 3.1E. In certain embodiments, the sulfur-containing polymer comprises a thiol-terminated polysulfide such as, for example, a Thiokol-LP® polysulfide, a Thioplast® polysulfide or a combination thereof.
[0188] In such embodiments, when used as a curing agent, a sulfur-containing polymer comprises from about 20% by weight to about 90% by weight of the composition, from about 30% by weight to about 80% by weight , from about 40% by weight to about 60% by weight and in certain embodiments, about 50% by weight, where the weight percentage is based on the total weight of the composition.
[0189] In such compositions, a sulfur-containing Michael acceptor adduct comprises from about 20% by weight to about 90% by weight of the composition, from about 30% by weight to about 80% by weight, from about from 40% by weight to about 60% by weight, and in certain embodiments, about 50%, where the weight percentage is based on the total dry weight of the composition.
[0190] Compositions comprising a sulfur-containing Michael acceptor adduct and a sulfur-containing polymeric curing agent may comprise a catalyst, such as an amine catalyst including any of those described herein.
[0191] In certain embodiments, a composition comprises a polyether ether adduct and a curing agent. A polythether adduct includes any of those described herein, such as polythether adducts of Formula (3), Formula (3a) and combinations thereof.
[0192] In certain embodiments of such compositions, the composition comprises a sulfur-containing Michael acceptor adduct provided by the present invention and a curing agent selected from a sulfur-containing polymer, comprising at least two terminal groups reactive with the acceptor groups of Michael, a monomeric thiol, a polythiol, a polyamine, a blocked polyamine, and a combination of any of the above. In certain embodiments, a curing agent comprises a sulfur-containing polymer comprising at least two terminal groups reactive with Michael's acceptor groups; in certain embodiments a monomeric thiol; in certain embodiments, a polythiol; in certain embodiments, a polyamine; and in certain embodiments, a blocked polyamine. In certain embodiments of such compositions, a curing agent comprises a sulfur-containing polymer comprising at least two terminal groups reactive with Michael's acceptor groups and a compound containing at least two terminal groups, reactive with Michael's acceptor groups selected from a monomeric thiol, a polythiol, a polyamine, a blocked polyamine, and a combination of any of the above.
[0193] In certain embodiments, a sulfur-containing polymer comprising at least two reactive end groups with Michael acceptor groups is selected from a polythioether polymer comprising at least two reactive end groups with Michael acceptor groups, a polysulfide polymer comprising at least two reactive terminal groups with Michael's acceptor groups, and a combination thereof. In certain embodiments, the terminal groups reactive with Michel's acceptor groups are terminal thiol groups. In such embodiments, a thiol-terminated polythether can be selected from a Formula (4) polythether, a Formula (4a) polythether and a combination thereof. In certain embodiments, the sulfur-containing polymeric curing agent comprises a thiol-terminated polysulfide such as, for example, Thiokol-LP® and Thioplast® polysulfide polymers.
[0194] In certain compositions, the curing agent comprises a monomeric thiol. A monomeric thiol refers to a compound containing at least two terminal thiol groups. Examples of monomeric thiols include dithiols of Formula (5). Polythiols refer to compounds of higher molecular weight having terminal thiol groups and thiol groups in the main chain.
[0195] Examples of polyamines include, for example, aliphatic polyamines, cycloaliphatic polyamines, aromatic polyamines, and mixtures thereof. In certain embodiments, the polyamine can include a polyamine containing at least two functional groups independently selected from primary amine (-NH2), secondary amine (-NH-) and combinations thereof. In certain embodiments, the polyamine has at least two primary amine groups.
[0196] In certain embodiments, a polyamine is a sulfur-containing polyamine. Examples of suitable sulfur-containing polyamines are isomers of benzenediamino-bis (methylthio) - such as 1,3-benzenediamino-4-methyl-2,6-bis (methylthio) - and 1,3-benzenediamino-2-methyl-4 , 6-

[0197] Such polyamines containing sulfur are available on the market, for example, being supplied by Albermale Corporation under the brand name Ethacure®300.
[0198] Suitable polyamines also include, for example, polyamines having the following structure:

[0199] where each R11 and each R12 are independently selected from methyl, ethyl, propyl, and isopropyl groups, 13and each R is independently selected from hydrogen and chlorine. Examples of amine-containing curing agents include the following compounds provided by Lonza, Ltd. (Basel, Switzerland); Lonzacure® M-DIPA, Lonzacure® M-DMA, Lonzacure® M-MEA, Lonzacure® M-DEA, Lonzacure® M-MIPA, Lonzacure® M-CDEA.
[0200] In certain embodiments, a polyamine comprises a diamine, such as 4,4'-methylenebis (3-chloro-2,6-diethylaniline) (Lonzacure® M-CDEA), 2,4-diamino-3,5- diethyl-toluene, 2,6-diamino-3,5-diethyl-toluene and mixtures thereof (collectively diethyltoluenediamine or DETDA), a sulfur-containing diamine, such as Ethacure® 300, 4,4'-methylene-bis (2-chloroaniline ) and their mixtures. Other suitable diamines include 4,4'-methylenebis (dialkylaniline), 4,4'-methylene-bis (2,6-dimethylaniline), 4,4'-methylene-bis (2,6-diethylaniline), 4,4 ' -methylene-bis (2-ethyl-6-methylaniline), 4,4'-methylene-bis (2,6-diisopropylaniline), 4,4'-methylene-bis (2-isopropyl-6-methylaniline), 4, 4'-methylene-bis (2,6-diethyl-3-chloroaniline), and combinations of any of the above.
[0201] In addition, examples of suitable polyamines include ethylene amines, such as ethylenediamine (EDA0, diethylene triamine (DETA), triethylene tetramine (TETA), tetraethylenepentamine (TEPA), pentaethylenehexamine (PEHA), piperazine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperidine, morpholine, substituted piperine, , diethylenediamine (DEDA), 2-amino-1-ethylpiperazine, and combinations thereof In certain embodiments, a polyamine can be selected from one or more isomers of C1-3 dialkyl toluenediamine, such as 3,5-dimethyl-2,4 - toluenediamine, 3,5-dimethyl-2,6-toluenediamine, 3,5-diethyl-2,4-toluenediamine, 3,5-diethyl-2,6-toluenediamine, 3,5-diisopropyl-2,4-toluenediamine , 3,5-diisopropyl-2,6-toluenediamine, and combinations thereof In certain embodiments, a polyamine may be selected from methylene dianiline, trimethylene glycol di (para-aminobenzoate) and combinations thereof.
[0202] In certain embodiments, a polyamine includes a compound having the structure:

[0203] In certain embodiments, a polyamine includes one or more methylene bis anilines, one or more aniline sulfides, and / or one or more bianilines that can be represented by the general structures described, for example, in paragraph [0072] of the publication No. 2011/0092639, incorporated herein by reference.
[0204] In certain embodiments, a polyamine includes compounds represented by the general structure:

[0205] where R20, R21, R22 and R23 are independently selected from C1-3 alkyl, CH3-S-, and halogen, such as, although not restricted to chlorine and bromine. In certain embodiments, a polyamine represented by the immediately preceding structure may be diethyl toluene diamine (DETDA), where R23 is methyl, R20 and R21 are each ethyl, and R22 is hydrogen. In certain embodiments, the polyamine is 4,4'-methylenedianiline.
[0206] Examples of blocked polyamines include ketimines, enamines, oxazolidines, aldimines, and imidazolidines. In certain embodiments, the blocked polyamine is Vestamin®A 139. Sulfur-containing polymer adduct, sulfur-containing polymer, and a compound having at least two Michael acceptor groups
[0207] In certain embodiments, a composition comprises a sulfur-containing polymer and a sulfur-containing Michael acceptor adduct. In certain embodiments, a composition comprises a sulfur-containing polymer, a polyfunctional Michael acceptor, and a sulfur-containing Michael acceptor adduct.
[0208] In these compositions, a sulfur-containing polymer comprises at least two terminal groups reactive with Michael acceptor groups. In these compositions, the sulfur-containing polymer can be selected from a polythioether polymer, a polysulfide polymer, or a combination thereof, including an appropriate polythioether polymer or polysulfide polymer provided by the present invention.
[0209] In certain embodiments, a sulfur-containing polymer is selected so that the end groups are reactive with the polyfunctional Michael acceptor and the sulfur-containing Michael acceptor adduct. In certain embodiments, a sulfur-containing polymer comprises terminal thiol groups including any of the thiol-terminated polyethers, thiol-terminated polysulfides and combinations thereof described herein.
[0210] In certain embodiments of such compositions, a sulfur-containing polymer adduct comprises a polythioether polymer adduct provided by the present invention, a polysulfide polymer adduct provided by the present invention or a combination thereof.
[0211] When a composition comprises a polyfunctional monomeric Michael acceptor, any monomeric Michael acceptor having at least two groups of Michael acceptor, such as, for example, divinyl sulfone or other Michael acceptors, may even be used one of the ones described here.
[0212] In certain embodiments, a sulfur-containing polymer is selected from a polythioether of Formula (3), Formula (3a) and a combination thereof; a polyfunctional Michael acceptor adduct is selected from an adduct of Formula (4), Formula (4a) and a combination thereof; and a polyfunctional monomeric Michael acceptor is selected from a compound containing two or more activated alkenyl groups, such as vinyl ketone or vinyl sulfone, such as divinyl sulfone.
[0213] In such embodiments, the polyfunctional Michael acceptor and Michael acceptor adduct comprise 10% by weight to 90% by weight of the composition, from 20% by weight to 80% by weight, from 30% by weight to 70% % by weight, and in certain embodiments, from 40% by weight to 60% by weight, where% by weight is based on the total weight of dry solids in the composition.
[0214] Compositions comprising a sulfur-containing polymer, a polyfunctional Michael acceptor, and a sulfur-containing polymer adduct can comprise a catalyst, such as an amine catalyst including any of those described herein. Epoxy Blend
[0215] In certain embodiments, the compositions provided by the present invention comprise an epoxy curing agent. Thus, in addition to a Michael acceptor curing agent, a sulfur containing polymeric curing agent, and / or a sulfur containing Michael acceptor adduct curing agent, a composition may comprise one or more polypoxy curing agents. Examples of suitable epoxies include, for example, polyepoxide resins, such as hydantoin diepoxide, Bisphenol-A diglycidyl ether, Bisphenol-F diglycidyl ether, Novolac® type epoxides, such as DENTM 438 (from Dow), certain unsaturated resins epoxidized, and combinations of any of the aforementioned. A polyepoxide refers to a compound containing two or more reactive epoxy groups.
[0216] In certain embodiments, a polypoxy curing agent comprises a polymer with epoxy functionality. Examples of suitable polymers with epoxy functionality include the polymorphic polymers with epoxy functionality described in U.S. Patent Application Serial No. 13 / 050,988 and polyether ethers. with epoxy functionality described in U.S. Patent No. 7,671,145. In general, when used as a curing agent, a polymer with epoxy functionality has a molecular weight of less than about 2,000 Daltons, less than about 1,500 Daltons, less than about 1,000 Daltons, and in certain embodiments, less than about 500 Daltons.
[0217] In such compositions, an epoxy can comprise from about 0.5% by weight to about 20% by weight of the composition, from about 1% by weight to about 10% by weight, from about 2% by weight. weight at about 8% by weight, from about 2% by weight to about 6% by weight, and in certain embodiments, from about 3% by weight to about 5% by weight, where the weight percentage is based on the total solids weight of the composition. Mixture of Isocyanate
[0218] In certain embodiments, the compositions provided by the present invention comprise an isocyanate curing agent. Thus, in addition to a Michael acceptor curing agent, a sulfur-containing polymeric curing agent, and / or a sulfur-containing Michael acceptor curing agent, a composition may comprise one or more polyisocyanate curing agents that they are reactive with thiol groups, but not reactive with Michael acceptor groups, such as vinyl sulfone groups. Examples of isocyanate curing agents include allyl isocyanate, 3-isopropenyl-isocyanate, α-dimethylbenzyl, toluene diisocyanate, and combinations of any of the above. Isocyanate curing agents are available on the market and include, for example , products with the brands Baydyr® (Bayer Materialscience), Desmodur® (Bayer Materialscience), Solubond® (DSM), ECCO (ECCO), Vestanat® (Evonik), Irodur® (Huntsman), RhodocoatTM (Perstorp), and Vancham® (VTVanderbilt). In certain embodiments, a polyisocyanate curing agent comprises isocyanate groups that are reactive with thiol groups and that are less reactive with Michael's acceptor groups.
[0219] In certain embodiments, an isocyanate curing agent comprises a polymer with isocyanate functionality. Examples of suitable polymers with isocyanate functionality include the poliform polymers with isocyanate functionality described in U.S. Patent Application Serial No. 13 / 051,002. In general, when used as a curing agent, an isocyanate-functional polymer has a molecular weight of less than about 2,000 Daltons, less than about 1,500 Daltons, less than about 1,000 Daltons, and in certain embodiments, less than about 500 Daltons.
[0220] In such compositions, an epoxy can comprise from about 0.5% by weight to about 20% by weight of the composition, from about 1% by weight to about 10% by weight, from about 2% by weight. weight at about 8% by weight, from about 2% by weight to about 6% by weight, and in certain embodiments, from about 3% by weight to about 5% by weight of the composition, where the percentage in weight is based on the total solids weight of the composition. Hydroxyl and Amine Cure
[0221] Michael's sulfur-containing acceptor adducts provided by the present invention can also be modified for use in specific applications and chemical curing agents. For example, spray sealing applications require rapid curing without heating. Amine-based systems using epoxy curing agents are quite suitable for such applications. Consequently, the sulfur-containing Michael acceptor adducts can be adapted to other chemical curing agents by modifying or capping the terminal Michael acceptor groups, for example, with hydroxyl groups or amine groups.
[0222] Sulfur-containing adducts with hydroxyl termination can be prepared by reacting a sulfur-containing Michael acceptor adduct provided by the present invention, such as a Formula (1), Formula (3) or Formula (3a) adduct and a compound containing a terminal thiol group and a terminal hydroxyl group. In certain embodiments, a compound containing a terminal thiol group and a terminal hydroxyl group has the structure HS-R11-OH, where R11 is selected from C2-6 alkanodiyl, C6-8 cycloacanodiyl, C6-10 alkanocycloalkanediyl, C5-8 heterocycloalkanediyl, C6-8 arenodiyl, C6-10 alkanarenodyl, C5-8 heteroarenodiyl, and - [(- CHR3) s — X—] q— (CHR3) r—, where q, r, s, X and R3 are as defined for Formula ( 5). In certain embodiments, a sulfur-containing adduct is derived from Permapol® 3.1E. The reaction can take place in the presence of a catalyst at a temperature of about 25 ° C to about 50 ° C.
[0223] In certain embodiments, a hydroxyl-terminated sulfur-containing adduct comprises a hydroxyl-terminated polythioethic adduct of Formula (8), a hydroxyl-terminated polythioethic adduct of Formula (8a), and a combination thereof: R9 — R6 '—S — R1 - [- S— (CH2) p — O— (R2 — O) m— (CH2) 2 — S — R1—] n — S — R6' — R9 (8) {R9 — R6 - S — R1 - [- S— (CH2) p — O— (R2 — O) m— (CH2) 2 — S — R1—] n — S — V '-} zB (8a)
[0224] where:
[0225] each R1is independently selected from C2-10 alkanediyl, C6-8 cycloalkanediyl, C6-10 alkanocycloalkanodiyl, C5-8 heterocycloalkanediyl, and - [(—CHR3—) s — X—] q - (- CHR3—) r—, where :
[0226] is a whole number from 2 to 6;
[0227] which is a whole number from 1 to 5;
[0228] whole number from 2 to 10;
[0229] each R3 is independently selected from hydrogen and methyl; and
[0230] each X is independently selected from -O-, -S- and -NHR-, where R is selected from hydrogen and methyl;
[0231] each R2 is independently selected from C1-10 alkanediyl, C6-8 cycloalkanodiyl, C6-14 alkanocycloalkanodiyl, and - [(- CHR3) s — X—] q— (CHR3) r—, where s, q, r, R3 and X are as defined for R1;
[0232] a total number of 0 to 50;
[0233] ninth number from 1 to 60;
[0234] foot an entire number from 2 to 6;
[0235] Bre represents a nucleus of a polyfunctionalizing agent with vinyl ending z-valente B (-V) z, where:
[0236] z is an integer from 3 to 6; and
[0237] each V is a group comprising a terminal vinyl group; and
[0238] each -V'- is derived from the reaction of -V with a thiol;
[0239] each -R6 'is CH2 — C (R4) 2 — S (O) 2 — C (R4) 2 — CH2—, where each R4 is independently selected from hydrogen and C1-3 alkyl; and
[0240] each R9- is a moiety containing a terminal hydroxyl group.
[0241] In certain embodiments of Formula (8) and Formula (8a), R9 is -S-R11-OH, where R11 is defined herein.
[0242] In certain embodiments, compositions comprise one or more hydroxyl-terminated sulfur-containing adducts and one or more polyisocyanate curing agents. Examples of suitable isocyanate curing agents include toluene diisocyanate, and combinations of any of the above. Isocyanate curing agents are available on the market and include, for example, products under the brand name Baydur® (Bayer MaterialScience), Desmodur® (Bayer MaterialScience), Solubond® (DSM), ECCO (ECCO), Vestanat® (Evonik), Irodur® (Huntsman), RhodocoatTM (Perstorp) and Vanchem® (VTVanderbilt).
[0243] Amine-terminated sulfur-containing adducts can be prepared by reacting a sulfur-containing Michael acceptor adduct provided by the present invention, such as an adduct of Formulas (1), (3) or (3a) and a compound containing a terminal thiol group and a terminal amine group. In certain embodiments, a compound containing a terminal thiol group and a terminal hydroxyl group has the structure HS-R11-N (R12) H, where R11 is selected from C2-6 alkanodiyl, C6-8 cycloalkanodiyl, C6-10 alkanocycloalkanodiyl, heterocycloalkanodiyl C5-8, C6-8 arenodiyl, C6-10 alkanorenodiyl, C5-8 heteroarenodiyl, and - [(—CHR3) s — X—] q— (CHR3) r—, where q, r, s, X and R3 are as defined for Formula (5). In certain embodiments, R12 is selected from hydrogen and C1-3 alkyl and in certain embodiments, R12 is hydrogen. In certain embodiments, a sulfur-containing adduct is derived from Permapol® 3.1E. The reaction can take place in the presence of a catalyst at a temperature of about 25 ° C to about 50 ° C.
[0244] In certain embodiments, an amine-terminated sulfur-containing adduct comprises an amine-terminated polythioether adduct of Formula (8a), an amine-terminated polythioether adduct, and a combination thereof: R9-R6 '-S-R1- [-S- (CH2) pO- (R2-O) m- (C ^^ - S-R1-] nS-R6'-R9 (8) {R9-R6 -S-R1- [-S- (CH2) pO- (R2-O) m- (CH2) 2-S-R1-] nS — V '-} zB (8a)
[0245] where:
[0246] each R1 is independently selected from C2-10 alkanediyl, C6-8 cycloalkanodiyl, C6-10 alkanocycloalkanodiyl, C5-8 heterocycloalkanediyl, and - [(-CHR3-) s-X-] q - (- CHR3-) r-, where:
[0247] ninth number from 2 to 6;
[0248] which is a whole number from 1 to 5;
[0249] whole number from 2 to 10;
[0250] each R3 is independently selected from hydrogen and methyl; and
[0251] each X is independently selected from -O-, -S- and -NHR-, where R is selected from hydrogen and methyl;
[0252] each R2 is independently selected from C1-10 alkanediyl, C6-8 cycloalkanediyl, C6-14 alkanocycloalkanediyl, and - [(- CHR3) sX-] q- (CHR3) r-, where s, q, r, R3 and X are as defined for R1;
[0253] a total number of 0 to 50;
[0254] ninety-one-number from 1 to 60;
[0255] foot a whole number from 2 to 6;
[0256] Bre represents a nucleus of a polyfunctionalizing agent with vinyl ending z-valente B (-V) z, where:
[0257] z is an integer from 3 to 6; and
[0258] each V is a group comprising a terminal vinyl group; and
[0259] each -V'- is derived from the reaction of -V with a thiol;
[0260] each -R6 'is CH2-C (R4) 2-S (O) 2-C (R4) 2-CH2-, where each R4 is independently selected from hydrogen and C1-3 alkyl; and
[0261] each R9- is a moiety containing a terminal amine group.
[0262] In certain embodiments, R9 is HS-R11-N (R12) H, and in certain embodiments of Formula (8) and Formula (8A), R9 is -S- R11-NH2.
[0263] In certain embodiments, compositions comprise one or more amine-containing sulfur adducts and one or more polyisocyanate curing agents, such as those described herein. Compositions
[0264] The compositions provided by the present invention can include one or more catalysts. Catalysts suitable for use in reactions between Michael acceptors, such as activated alkenyl groups and thiol groups include base catalysts, such as amines. Examples of suitable amine catalysts include, for example, triethylenediamine (1,4-diazabicyclo [2.2.2] octane, DABCO), dimethylcyclohexylamine (DMCHA), dimethylethanolamine (DMEA), bis- (2-dimethylaminoethyl) ether, N-ethylmorpholine , triethylamine, 1,8-diazabicyclo [5.4.0] undecene-7 (DBU), pentamethyldiethylenetriamine (PMDETA), benzildimethylamine (BDMA), N, N, N'-trimethyl-N'-hydroxyethyl-bis (aminoethyl) ether, and N '- (3-dimethylamino) propyl) -N, N-dimethyl-1,3-propanediamine.
[0265] In compositions comprising epoxies, the composition may comprise a base catalyst, including amine catalysts, such as any of those described herein.
[0266] In certain embodiments, the compositions provided by the present invention comprise one or more of an adhesion promoter. One or more additional adhesion promoters may be present in an amount of 0.1% by weight to 15% by weight of a composition, less than 5% by weight, less than 2% by weight, and in certain embodiments, less than 1 % by weight, based on the total dry weight of the composition. Examples of adhesion promoters, such as Methylon® phenolic resin and organosilanes, such as silanes with epoxy, mercapto or amino functionality, such as Silquest® A-187 and Silquest® A-1100. Other useful adhesion promoters are known in the state of technical.
[0267] The compositions provided by the present invention can comprise one or more different types of filler. Suitable fillers include those commonly known in the art, including inorganic fillers, such as carbon black and calcium carbonate (CaCO3), silica, polymer powders and light fillers. Suitable light loads include, for example, those described in U.S. Patent No. 6,525,168. In certain embodiments, a composition includes from 5% by weight to 60% by weight of the charge or combination of charges, 10% by weight to 50% by weight, and in certain embodiments, from 20% by weight to 40% by weight, based on the total dry weight of the composition. Compositions provided by the present invention can further include one or more dyes, thixotropic, accelerated agents, flame retardants, adhesion promoters, solvents, masking agents, or a combination of any of the aforementioned. As can be appreciated, fillers and additives used in a composition can be selected so as to be compatible with each other, as well as with the polymeric component, curing agent and / or the catalyst.
[0268] In certain embodiments, compositions provided by the present invention include low density filler particles. As used herein, the term low density, when used with reference to such particles, means that the particles have a specific gravity of at most 0.7, in certain embodiments of at most 0.25, and in certain embodiments, of at most 0.1. Suitable light charge particles often fall into two categories - microspheres and amorphous particles. The specific gravity of microspheres can vary from 0.1 to 0.7 and include, for example, polystyrene foam, polyacrylate and polyolefin microspheres, and silica microspheres with particle sizes ranging from 5 to 100 microns and a specific gravity of 0.25 (Eccospheres®). Other examples include alumina / silica microspheres with particle sizes in the range of 5 to 300 microns and a specific gravity of 0.7 (Fillite®), aluminum silicate microspheres with a specific gravity of about 0.45 to about 0 , 7 (Z-Light®), polyvinylidene copolymer microspheres coated with calcium carbonate with a specific gravity of 0.13 (Dualite®6001AE) and acrylonitrile copolymer microspheres coated with calcium carbonate, such as Dualite®E135, with an average particle size of about 40 μm and a density of 0.135 g / cc (Henkel). Suitable fillers to reduce the specific gravity of the composition include, for example, hollow microspheres, such as Expancel® microspheres (from AkzoNobel) or Dualite® low density polymer microspheres (from Henkel). In certain embodiments, the compositions provided by the present invention include lightly charged particles comprising an outer surface coated with a thin layer, such as those described in American publication No. 2010/0041839 in paragraphs [0016] - [0052], the part of which is cited is incorporated herein by reference.
[0269] In certain embodiments, a low density filler comprises less than 2% by weight of a composition, less than 1.5% by weight, less than 1.0% by weight, less than 0.8% by weight, less than 0.75% by weight, less than 0.7% by weight and in certain embodiments, less than 0.5% by weight of a composition, where the weight percentage is based on the total dry solids weight of the composition.
[0270] In certain embodiments, the compositions provided by the present invention comprise at least one filler that is effective in reducing the specific gravity of the composition. In certain embodiments, the specific gravity of a composition is 0.8 to 1, 0.7 to 0.9, 0.75 to 0.85, and in certain embodiments, it is 0.8. In certain embodiments, the specific gravity of a composition is less than about 0.9, less than about 0.8, less than about 0.75, less than about 0.7, less than about 0.65 , less than about 0.6, and in certain embodiments, less than about 0.55.
[0271] In certain embodiments, the compositions provided by the present invention comprise an electrically conductive charge. Electrical conductivity and EMI / RFI shielding efficiency can be imparted to the composition by incorporating conductive materials into the polymer. Conductive elements may include, for example, metallic or metallized particles, fabrics, fabrics, fibers and combinations thereof. The metal can be in the form, for example, of filaments, particles, sheets or spheres. Examples of metals include copper, nickel, silver, aluminum, tin and steel. Other conductive materials that can be used to provide EMI / RFI shielding efficiency to polymeric compositions include conductive particles or fibers comprising carbon or graphite. Conductive polymers, such as polythiophenes, polypyrroles, polyaniline, poly (p-phenylene) vinylene, polyphenylene sulfide, polyphenylene, and polyacetylene can also be used.
[0272] Examples of electrically non-conductive charges include materials such as, although not restricted to calcium carbonate, mica, polyamide, pyrogenic silica, molecular sieve powder, microspheres, titanium dioxide, chalk, alkali blacks, cellulose, sulfide zinc, heavy spar, alkaline earth oxides, alkaline earth hydroxides, and the like. Loads also include broadband materials such as zinc sulfide and inorganic barium compounds. In certain embodiments, an electrically conductive base composition can comprise an amount of non-electrically conductive charges ranging from 2% by weight to 10% by weight, based on the total weight of the base composition, and in certain embodiments, it can vary from 3% by weight to 7% by weight. In certain embodiments, a curing agent composition may comprise an amount of electrically non-conductive charge ranging from less than 6% by weight and, in certain embodiments, ranging from 0.5% to 4% by weight, based on the total weight of the curing agent composition.
[0273] Loads used to provide electrical conductivity and EMI / RFI shielding efficiency to polymeric compositions are well known in the prior art. Examples of electrically conductive charges include electrically conductive charges based on noble metal, such as pure silver; noble metals plated with noble metal, such as gold plated silver; non-noble metals plated with noble metal, such as copper, nickel or silver-plated aluminum, such as, for example, silver-plated aluminum core particles, or platinum-plated copper particles; glass, plastic or ceramics bathed in noble metal, such as glass microspheres bathed in silver, aluminum microspheres bathed in noble metal or plastic microspheres bathed in noble metal; noble metal-plated mica; and other conductive charges in noble metal. Materials based on non-noble metal can also be used and include, for example, non-noble metals bathed with non-noble metal, such as copper-plated iron particles, or nickel-plated copper; non-noble metals, for example, copper, aluminum, nickel, cobalt; non-metals plated with non-precious metal, for example, nickel-plated graphite, and non-metallic materials, such as carbon black and graphite. Combinations of electrically conductive loads can also be used to meet the desired conductivity, EMI / RFI shielding efficiency, hardness, and other properties appropriate for a specific application.
[0274] The shape and size of the electrically conductive charges used in the compositions of the present invention can be any shape and size to impart EMI / RFI shielding efficiency to the cured composition. For example, charges can have any shape generally used in the manufacture of electrically conductive charges, including spherical, in sheets, on nameplates, particles, dust, irregular, fibrous and the like. In certain sealing compositions of the invention, a base composition may comprise nickel-coated graphite, in the form of a particle, powder or sheet. In certain embodiments, the amount of Ni-coated graphite in a base composition can vary from 40% by weight to 80% by weight, and in certain embodiments it can vary from 50% by weight to 70% by weight, based on the total weight of the base composition. In certain embodiments, an electrically conductive charge can comprise Ni fiber. Ni fiber can have a diameter ranging from 10 μ m to 50 μ m and a length ranging from 250 μ m to 750 μ m. A base composition can comprise, for example, an amount of Ni fiber ranging from 2% by weight to 10% by weight and in certain embodiments, from 4% by weight to 8% by weight, based on the total weight of the base composition .
[0275] Carbon fibers, particularly graphite carbon fibers, can also be used to provide electrical conductivity to compositions of the present invention. Carbon fibers formed through steam phase pyrolysis methods and graphitized through heat treatment and which are hollow or solid with a fiber diameter ranging from 0.1 micron to several microns, have high electrical conductivity. As will be described in U.S. Patent No. 6,184,280, carbon microfibers, nanotubes or carbon fibrils with an outside diameter of less than 0.1 μm to tens of nanometers can be used as electrically conductive charges. An example of graphitized carbon fiber suitable for conductive compositions of the present invention includes PANEX 30MF (Zoltek Companies, Inc., St. Louis, MO), a 0.921 μm diameter circular fiber with an electrical resistivity of 0.00055 Q-cm .
[0276] The average particle size of an electrically conductive charge can be in a useful range to provide electrical conductivity to a polymer-based composition. For example, in certain embodiments, the particle size of one or more charges can vary from 0.25 μ m to 250 μ m, in certain embodiments it can range from 0.25 μ m to 75 μ m and in certain embodiments it can range from 0, 25 μ to 60 μ m. In certain embodiments, the composition of the present invention may comprise Ketjen Black EC-600 JD (Akzo Nobel, Inc., Chicago, IL), an electrically conductive carbon black characterized by an iodine absorption of 1000-11500 mg / g ( test method J0 / 84-5) and a pore volume of 480-510 cm3 / 100 gm (DBP absorption, KTM 81-3504). In certain embodiments, an electrically conductive carbon black charge is Black Pearls 2000 (Cabot Corporation, Boston, MA).
[0277] In certain embodiments, electrically conductive polymers can be used to provide or modify the electrical conductivity of compositions of the present invention. Polymers containing sulfur atoms incorporated into the aromatic groups or adjacent to double bonds, such as in polyphenylene sulfide, and polythiophene, are known to be electrically conductive. Other electrically conductive polymers include, for example, polypyrols, polyaniline, poly (p-phenylene) vinylene, and polyacetylene. In certain embodiments, the sulfur-containing polymers forming a base composition can be polysulfides and / or polyethers. As such, sulfur-containing polymers can comprise aromatic sulfur groups and sulfur atoms adjacent to conjugated double bonds, such as vinylcyclohexene-dimercaptodioxaoctane groups, to increase the electrical conductivity of the compositions of the present invention.
[0278] Compositions of the present invention can comprise more than one electrically conductive charge and more than one electrically conductive charge can be made and / or have the same or different shapes. For example, a sealing composition can comprise electrically conductive Ni fibers and electrically conductive Ni-coated graphite in the form of powder, particles or scales. The amount and type of electrically conductive charge can be selected to produce a sealant composition that, when cured, exhibits a surface resistance (four point resistance) of less than 0.50Q / cm2, and in certain embodiments, a surface resistance of less than 0 , 15Q / cm2. The amount and type of charge can also be selected to provide efficient EMI / RFI shielding over the frequency range from 1 MHz to 18 GHz for a sealed opening using a sealing composition of the present invention.
[0279] Galvanic corrosion of different metallic surfaces and conductive compositions of the present invention can be minimized or avoided by adding corrosion inhibitors to the composition, and / or choosing appropriate conductive loads. In certain embodiments, corrosion inhibitors include strontium chromate, calcium chromate, magnesium chromate, and combinations thereof. American patents Nos. 5,284,888 and 5,270,364 describe the use of aromatic triazoles to inhibit corrosion of aluminum and steel surfaces. In certain embodiments, the corrosion inhibitor may comprise less than 10% by weight of the total weight of the electrically conductive composition. In certain embodiments, the corrosion inhibitor may comprise an amount ranging from 2% by weight to 8% by weight of the total weight of the electrically conductive composition. Corrosion between different metallic surfaces can also be minimized or avoided by choosing the type, quantity and properties of the conductive charges that comprise the composition.
[0280] In certain embodiments, a sulfur-containing polymer and / or a sulfur-containing polymer adduct comprises from about 50% by weight to about 90% by weight of a composition, from about 60% by weight to about 90 % by weight, from about 70% by weight to about 90% by weight, and in certain embodiments, from about 80% by weight to about 90% by weight of the composition, where% by weight is based on weight total dry solids of the composition.
[0281] A composition can also include any number of additives as desired. Examples of suitable additives include plasticizers, pigments, surfactants, adhesion promoters, thixotropic agents, flame retardants, masking agents, and accelerators (such as amines, including (1,4-diazabicyclo [2.2.2] octane, DABCO®) and combinations of any of the aforementioned.When used, additives may be present in a composition in an amount ranging, for example, from about 0% by weight to 60% by weight.In certain embodiments, the additives may be present in a composition in an amount ranging from about 25% to 60% by weight. Compositions Containing a Controlled Release Catalyst
[0282] In another improvement of such compositions, it is desirable to extend the post-mixing life and to control the curing speed. These and other properties can be achieved using a controlled release amine catalyst. Accordingly, the compositions provided by the present invention comprise (a) a compound comprising at least two terminal groups reactive with Michael acceptor groups; (b) a compound having at least two groups of Michael acceptors; and (c) a controlled-release amine catalyst, where at least one of (a) and (b) comprises a polythioether polymer.
[0283] Systems in which a controlled-release amine catalyst is released through photolytic, hydrolytic, thermal or ultrasonic mechanisms are described. Upon release of the amine catalyst through any of the mechanisms, the catalytic amine catalyzes the reaction by adding Michael between a compound terminated with reactive groups with Michael acceptor groups, such as terminal thiol groups and a compound containing at least two Michael's acceptor groups. The compound containing at least two terminal groups reactive with Michael acceptor groups can be a small molecule, such as a molecule with a molecular weight of less than 400 Daltons, a sulfur-containing polymer, such as a polyether, or a combination thereof. The compound containing at least two Michael acceptor groups can be a small molecule and / or it can be a Michael acceptor adduct. A suitable Michael acceptor adduct comprises a sulfur-containing compound, such as a polythioether terminated with Michael acceptor groups. In certain embodiments, at least one of the compound terminated with reactive groups with Michael's acceptor groups and the compound having at least two Michael's acceptor groups comprises a polyether.
[0284] In certain embodiments, compositions with extended post-mixing life and controlled cure rate can be obtained using a controlled release amine catalyst. In such systems, an amine catalyst, such as a strong base or primary amine that produces a rapid reaction rate, is protected and encapsulated and dispersed in the composition. Upon exposure, for example, to ultraviolet radiation, humidity or temperature, the catalytic amine is released and catalyzes the Michael addition reaction. In certain embodiments, the systems provide a post-mixing service life of more than 2 hours to 12 hours and cure within 24 to 72 hours after the service life.
[0285] In certain embodiments, the compositions comprise: (a) a compound comprising at least two terminal groups reactive with Michael acceptor groups; (b) a compound having at least two groups of Michael acceptors; and (c) a controlled-release amine catalyst, where at least one of (a) and (b) comprises a polythioether polymer.
[0286] In certain embodiments, methods are provided for using a composition comprising (a) a compound comprising at least two terminal groups reactive with Michael acceptor groups; (b) a compound containing at least two groups of Michael acceptors; and (c) a controlled-release amine catalyst, where at least one of (a) and (b) comprises a polythioether polymer. Controlled-release amine catalyst
[0287] Controlled-release amine catalysts have little or no activity until they are released, either chemically or physically. In certain embodiments, a controlled-release amine catalyst can be released upon exposure to ultraviolet radiation, heat, ultrasonification or moisture.
[0288] In the case of controlled-release amine catalysts that are released through ultraviolet radiation or moisture, the amine catalyst comprises a blocking group that reacts when exposed to ultraviolet radiation or moisture to release or unblock a reactive amine catalyst. In matrix encapsulating systems, the amine catalyst is captured between side chains of a crystalline or semi-crystalline polymer. At elevated temperature, the polymer melts allowing the amine catalyst to diffuse into the composition to catalyze the reaction.
[0289] In certain embodiments, a controlled release amine catalyst comprises a controlled release amine catalyst. In certain embodiments, a controlled release amine catalyst can be a controlled release primary amine catalyst, a controlled release secondary amine catalyst, or a controlled release tertiary amine catalyst. Examples of controlled release primary amine catalysts include, for example, C3-10 aliphatic primary amines, such as heptane amine, hexylamine and octamine. Examples of suitable secondary amine catalysts include, for example, cycloaliphatic diamines such as Jefflink®754 and aliphatic diamines such as Clearlink® 1000. Examples of suitable tertiary amine catalysts include, for example, N, N-dimethylethanolamine (DMEA), diaminobicyclooctane (DABCO), triethylene diamine (TEDA), bis (2-dimethylaminoethyl) ether (BDMAEE), N-ethylmorpholine, N ', N'-dimethylpiperazine, N, N, N', N ', N'-pentamethyl-diethylene- triamine (PMDETA), N, N'-dimethylcyclohexylamine (DMCHA), N, N-dimethylbenzylamine (DMBA), N, N, dimethylcetylamine, N, N, N ', N ”, N” -pentamethyl-dipropylene-triamine (PMDPTA ), triethylamine, and 1- (2-hydroxypropyl) imidazole. Other suitable amine catalysts include amidine catalysts, such as tetrametiguanidine (TMG), diazabicyclononene (DBN), diazabicyclo undecene (DBU) and imidazoles; and bicyclic guanidines, such as 1,5,7-triazabicyclo [4.4.0] dec-5-ene (TBD) and 1,5,7-triazabicyclo [4.4.0] dec-5-ene, 7-methyl (MTBD ).
[0290] In certain embodiments, an amine catalyst is selected from DBU, DABCO, IPDA, a primary amine C6-10, and a combination of any of the above.
[0291] The compositions can comprise one or more different types of amine catalyst.
[0292] When released, the controlled release catalysts provided by the present invention catalyze the reaction between a compound containing at least two terminal groups that are reactive with Michael's acceptor groups and a compound comprising at least two Michael's acceptor groups.
[0293] In controlled-release compositions provided by the present invention, the post-mixing life of a composition can be longer than 2 weeks, if the catalyst is not released. When the catalyst is released, either through chemical, photochemical or physical mechanisms, the curing time can be less than 72 hours, less than 60 hours, less than 48 hours, less than 36 hours and, in certain embodiments, less than 24 hours. The curing time without heating and in the presence of ambient humidity can be several days, such as, for example, 7 days. Controlled release amine photolabile catalyst
[0294] Certain compositions provided by the present invention comprise a photolabile catalyst. In these systems, UV radiation unlocks a blocked amine catalyst, which catalyzes the Michael addition reaction between a compound comprising at least two terminal groups that are reactive with Michael's acceptor groups and a compound comprising at least two acceptor groups of Michael. In certain embodiments, UV radiation initiates the reaction, which occurs over time, such as, for example, in several hours. Slow curing can be useful to improve surface adhesion and increase the post-mixing life by providing a longer working time.
[0295] Photolabile amines comprise a photolabile moiety attached to an amine.
[0296] In certain embodiments, a photolabile catalyst comprises CGI90 (BASF), which after UV activation, generates the tertiary amine, 1,5-diazabicyclo (4.3.0) non-5-eno (DBN). Other suitable photolabile amines are described in international publication No. WO 2003/033500 and in the documents cited here.
[0297] In compositions comprising a photolabile amine catalyst, the photolabile amine catalyst may comprise from 0.1% by weight to 5% by weight of the composition, from 0.3% by weight to 2% by weight of the composition and, in certain embodiments, from 0.5% by weight of the composition to 1% by weight of the composition. Moisture Released Amine Catalyst
[0298] In certain embodiments, a controlled-release amine catalyst comprises a blocked amine catalyst released by moisture. In these systems, the blocked amine catalyst can be unblocked in the presence of moisture to release an amine catalyst capable of catalyzing a Michael addition reaction. Examples of blocked moisture-released amine catalysts include ketimines, enamines, oxazolidines, aldimines, and imidazolidines. In the presence of moisture, the blocking group, for example, the blocking group or groups of ketamine, enamine, oxazolidine, aldimine or imidazolidine reacts with water to provide a catalytic amine catalyst and a ketone or alcohol.
[0299] In certain embodiments, a composition comprising a moisture-released amine catalyst comprises from 0.1% by weight to 2% by weight of water, from 0.2% by weight to 1.5% by weight of water, and in certain embodiments, from 0.5% by weight to 1% by weight of water. The composition is stored at low temperature, such as below 0 ° C, below -20 ° C, or in certain embodiments, below -40 ° C. When the composition is heated before and / or during application, the water unblocks the blocked amine, catalyzing the Michael addition reaction.
[0300] In certain embodiments, a blocked amine catalyst released by moisture releases a primary amine, a secondary amine, and in certain embodiments, a tertiary amine. In certain embodiments, a blocked amine catalyst released by moisture is Vestamin®A13 9, which is a blocked cycloaliphatic diamine. In certain embodiments, the deblocked amine is isophorone diamine (IPDA).
[0301] In compositions comprising a moisture-released amine catalyst, the moisture-released amine catalyst can comprise from 0.1% by weight to 4% by weight of the composition, from 0.5% by weight to 3% by weight of the composition and, in certain embodiments, from 1% by weight of the composition to 2% by weight of the composition.
[0302] In certain embodiments, the ratio (% weight /% weight) of weight percentage of water to amine catalyst released by moisture (% by weight) in the compositions provided by the present invention can be from 1 to 4, from 1 to 2, and in certain embodiments, from 1 to 1.
[0303] Compositions comprising a blocked amine catalyst released by moisture, in addition to being stored at low temperature, can be stored in order to avoid exposure to ambient humidity. Matrix encapsulation
[0304] Matrix encapsulation is a process by which droplets or particles of liquid or solid material are captured between side chains of a crystalline polymer. As the temperature rises, the crystalline polymer becomes amorphous and releases droplets or particles in the medium. The matrix encapsulants provided by the present invention comprise a crystalline matrix material that incorporates droplets or particles comprising an amine catalyst. Thus, the rate of reaction is to some extent controlled by the thermally dependent diffusion of the amine catalyst from the crystalline polymer. Crystalline polymers can have a well-defined sharp melting point or they can exhibit a melting point range. The use of waxy polymers for encapsulation of amine catalysts used in Michael addition compositions is described in U.S. Patent Application Publication No. 2007/0173602.
[0305] Examples of suitable matrix encapsulants include Intelimer® polymers (Air Products), such as Intelimer®13-1 and Intelimer® 13-1 and Intelimer®13-6. The properties of Intelimer® polymers are described in Lowry et al., “Cure evaluation of Intelimer® latent curing agents for thermoset resin applications” presented in Thermoset Resin Formulators Association Meeting, Chicago, IL, September 15-16, 2008.
[0306] A matrix encapsulant can be selected to release the amine catalyst after brief exposure to high temperature, such as less than 10 minutes, less than 5 minutes, or less than 2 minutes. During this brief temperature excursion, the amine catalyst is released from the matrix and diffuses to the reactive polymeric components. The composition can be heated during the curing process or left at room temperature. When left at room temperature, the released amine catalyst composition can cure in less than 2 hours, in less than 4 hours, and, in certain embodiments, less than 6 hours.
[0307] The amine catalysts can be incorporated into a matrix encapsulant by mixing at a temperature above the melting temperature of the matrix encapsulant, quickly cooling the mixture and crushing the solid to convert it to powder. In certain embodiments, the average particle size is less than 200 μ m, less than 150 μ m, less than 100 μ m, less than 50 μ m and in certain embodiments, less than 25 μ m.
[0308] In certain embodiments, a composition can comprise from 0.1% by weight to 25% by weight, from 1% by weight to 15% by weight, and in certain embodiments, from 5% by weight to 10% by weight of a matrix encapsulant comprising an amine catalyst. This correlates to about 0.01% by weight to 2% by weight, from 0.05% by weight to 1.5% by weight, and in certain embodiments, from 0.5% by weight to 1% in weight of an amine catalyst.
[0309] In certain embodiments, a matrix encapsulant suitable for use in compositions provided by the present invention comprises a ratio (% weight /% weight) of% weight of amine catalyst to% weight of matrix polymer from 1 to 15, from 2 to 10, and in certain embodiments, from 5 to 8.
[0310] Compositions comprising a sulfur-containing compound, a polyfunctional Michael acceptor, and a sulfur-containing adduct comprise a controlled release catalyst, including any of those cited herein. Uses
[0311] The compositions provided by the present invention can be used, for example, in sealants, coatings, encapsulants, and filler compositions. A sealant includes a composition capable of producing a film that has the ability to withstand operating conditions, such as humidity and temperature, and to at least partially block the transmission of materials, such as water, fuel and other liquids and gases. A coating composition includes a coating that is applied to the surface of a substrate to, for example, improve the properties of the substrate, such as appearance, adhesion, wettability, corrosion resistance, wear resistance, fuel resistance, and / or resistance abrasion. A filler composition includes material useful in an electronic assembly to provide resistance to shock and vibration and to exclude moisture and corrosive agents. In certain embodiments, sealing compositions provided by the present invention are useful, for example, as aerospace sealants and as internal coatings for fuel tanks.
[0312] In certain embodiments, compositions, such as sealants, can be provided as multi-pack compositions, such as two-pack compositions, wherein one of the packs comprises one or more thiol-terminated polyethers provided by the present invention and a second pack comprises one or more sulfur-containing polyfunctional epoxies provided by the present invention. Additives and / or other materials can be added to any of the packages, as desired or necessary. The two packages can be combined and mixed before use. In certain embodiments, the post-mixing service life of the one or more mixed thiol-terminated polyethers and epoxies is at least 30 minutes, at least 1 hour, at least 2 hours and, in certain embodiments, more than 2 hours; Post-mixing life refers to the period of time that the mixed composition remains suitable for use as a sealant after mixing.
[0313] In two-component compositions, one or more controlled-release amine catalysts can be included in either component or both components. In certain embodiments, the controlled release catalyst may be a third component that is mixed with a polyether and Michael acceptor components prior to use. In certain embodiments, the compositions are provided as a one-component composition. Such one-component compositions are maintained and stored under conditions such that the controlled release catalyst is not substantially released. For example, a composition comprising a photolabile catalyst can be protected against UV radiation, a moisture release catalyst can be sealed against moisture and frozen, and a composition comprising a matrix encapsulant can be stored at temperatures below the melting temperature of the product. encapsulating matrix polymer.
[0314] Compositions, including sealants, provided by the present invention can be applied to any of a variety of substrates. Examples of substrates to which a composition can be applied include metals, such as titanium, stainless steel, and aluminum, any of which can be anodized, primed, coated with organic or coated with chromate; epoxy; urethane; graphite; fiberglass composite; Kevlar®; acrylics; and polycarbonates. In certain embodiments, the compositions provided by the present invention can be applied to a coating on a substrate, such as a polyurethane coating.
[0315] The compositions provided by the present invention can be applied directly to the surface of a substrate or to a lower layer through any suitable coating process known in the art.
[0316] In addition, methods are provided to seal an opening using a composition provided by the present invention. Such methods comprise, for example, applying a composition provided by the present invention to a surface to seal an opening and cure the composition. In certain embodiments, a method for sealing an opening comprises: (a) applying a sealant composition provided by the present invention to one or more surfaces that define an opening, (b) mounting the surfaces defining the opening, and (c) curing the sealant to provide a sealed opening.
[0317] In certain embodiments, a composition can be cured under environmental conditions, where environmental conditions refer to a temperature of 20 ° C to 25 ° C and atmospheric humidity. In certain embodiments, a composition can be cured under conditions ranging from a temperature of 0 ° C to 100 ° C and a humidity of 0% relative humidity to 100% relative humidity. In certain embodiments, a composition can be cured at a higher temperature, such as at least 30 ° C, at least 40 ° C and, in certain embodiments, at least 50 ° C. In certain embodiments, a composition can be cured at room temperature, for example, 25 ° C. In certain embodiments, a composition can be cured by exposure to actinic radiation, such as ultraviolet radiation. As will also be appreciated, the methods can be used to seal openings in aerospace vehicles, including aircraft and aerospace vehicles.
[0318] In certain embodiments, the composition achieves a setting free cure in less than approximately 2 hours, less than approximately 4 hours, less than approximately 6 hours, less than approximately 8 hours, and, in certain embodiments, less than approximately 10 hours, at a temperature below about 200 ° F.
[0319] The time to form a viable seal using curable compositions of the present invention may depend on several factors, as will be appreciated by those skilled in the art, and as defined by the requirements of applicable standards and specifications. In general, the curable compositions of the present invention develop resistance / adhesion strength within 24 hours to 30 hours, and 90% of total adhesion resistance develops within 2 days to 3 days, after mixing and application to a surface . In general, the total adhesion resistance, as well as other properties of the cured compositions of the present invention develops fully within 7 days after mixing and applying a curable composition to a surface.
[0320] The cured compositions described herein, such as cured sealants, exhibit acceptable properties for use in aerospace applications. In general, it is desirable that sealants used in aviation and aerospace applications exhibit the following properties: peel strength greater than 20 pounds per linear inch (pli) on substrates according to the Aerospace Materials Specification (AMS), determined under conditions dried, after immersion in JRF for 7 days, and after immersion in a 3% NaCl solution, according to test specifications AMS 3265B; tensile strength between 300 pounds per square inch (psi) and 400 psi; tear strength greater than 50 pounds per linear inch (pli); elongation between 250% and 300%; and hardness greater than 40 Durometer A. These and other cured sealant properties suitable for aviation and aerospace applications are described in AMS 3265B, the entirety of which is hereby incorporated by reference. It is also desirable that, when cured, the compositions of the present invention used in aviation and aerospace applications exhibit a maximum volumetric percentage swelling of at most 25% after immersion for one week at 60 ° C (140 ° F) and ambient pressure in JRF type 1. Other properties, ranges, and / or thresholds may be appropriate for other sealing applications.
[0321] In certain embodiments, therefore, the compositions provided by the present invention are resistant to fuel. As used herein, the term “fuel resistant” means that a composition, when applied to a substrate and cured, can provide a cured product, such as a sealant, which exhibits a maximum 40% volumetric swelling in some cases maximum 25%, in some cases maximum 20%, in other cases maximum 10%, after immersion for 140 days at 140 ° F (60 ° C) and ambient pressure in Jet Reference Fluid (JRF) Type 1, according to methods similar to those described in ASTM D792 (American Society for Testing and Materials) or AMS 3269 (Aerospace Material Specification). The JRF Type 1 Jet Reference Fluid, as used to determine fuel resistance, has the following composition: toluene: 28 ± 1% by volume; cyclohexane (technical): 34 ± 1% by volume; isooctane: 38 ± 1% by volume; and tertiary dibutyl disulfide: 1 ± 0.005% by volume (see AMS 2629, issued on July 1, 1989, § 3.1.1, etc. from the SAE (Society of Automotive Engineers)).
[0322] In certain embodiments, the compositions provided herein provide a cured product, such as a sealant, exhibiting a tensile elongation of at least 100% and a tensile strength of at least 400 psi when measured according to the procedure described in AMS 3279, § 3.3.17.1, test procedure AS5127 / 1, § 7.7.
[0323] In certain embodiments, the compositions provide a cured product, such as a sealant, that exhibits an overlapping shear strength greater than 200 psi, such as at least 220 psi, at least 250 psi, and in some at least 400 psi, when measured according to the procedure described in SAE AS5127 / 1, paragraph 7.8.
[0324] In certain embodiments, a cured sealant comprising a composition provided by the present invention meets or exceeds the requirements for aerospace sealants, as defined in AMS 3277.
[0325] Openings, including openings for aerospace vehicles, sealed with the compositions provided by the present invention, are also described.
[0326] In certain embodiments, an electrically conductive seal composition provided by the present invention exhibits the following properties, measured at room temperature after exposure to 500 ° F for 24 hours; a surface resistivity of less than 1 ohms / square, a tensile strength greater than 200 psi, an elongation greater than 100%, a 100% cohesive failure measured in accordance with MIL-C-27725.
[0327] In certain embodiments, a cured sealant provided by the present invention exhibits the following properties, when cured for 2 days at room temperature, 1 day at 140 ° F, and 1 day at 200 ° F; a dry hardness of 49, a tensile strength of 428 psi, and an elongation of 266%; and after seven days in JRF, a hardness of 36, a tensile strength of 312 psi, and an elongation of 247%.
[0328] In certain embodiments, the compositions provided by the present invention exhibit a Shore A hardness (cure of 7 days) greater than 10, greater than 20, greater than 30, and in certain embodiments, greater than 40; a tensile strength greater than 10 psi, greater than 100 psi, greater than 200 psi, and in certain embodiments, greater than 500 psi; an elongation greater than 100%, greater than 200%, greater than 500% and in certain embodiments, greater than 1,000%, and a swelling after exposure to JRF (7 days) less than 20%. EXAMPLES
[0329] The embodiments provided by the present invention are also illustrated by reference to the following examples, which describe the synthesis, properties and uses of certain sulfur-containing polymers, Michael's acceptor adducts, and compositions comprising sulfur-containing polymers, Michael's acceptor adducts , and Michael's acceptors. It will be apparent to those skilled in the art that many modifications, both in materials and methods, can be practiced without departing from the scope of the invention. Example 1 Polythether cured with Divinil Sulfona Monomerica
[0330] To prepare Resin Mixture A, thiol-terminated polyethers of the type described in U.S. Patent No. 6,172,179, medium thiol functionality: 2.05-2.95, from PRC- DeSoto International, Inc., Sylmar , CA, plasticizer HB-40 (Solutia, Inc.), DABCO®33LV (Huntsman), Winnofil®SPM (Solvay), Sipernat®D13 (Evonik), and tung oil (Alnor Oil Company, Inc.) were added to a Max 300 container (FlackTek) in the order and quantities mentioned in Table 1. The materials were mixed with a DAC 600.1 FVZ mixer (FlackTek) for 45 seconds. Vinyl sulfone (Aldrich) (4.99g) was then added to Resin Mixture A and mixed for 1 minute. The mixture was immediately poured onto polyethylene sheets and pressed to form 1/8 ”sheets. The samples were cured for two weeks at room temperature. The laminar material was then tested for hardness, tensile strength, elongation and resistance to fluid. The results are shown in Table 2.Table 1 - Resin Mixing Components A
** Thiol-terminated polyethers of the type described in U.S. Patent No. 6,172,179, average thiol functionality: 2.05-2.95, from PRC-Desoto International, Inc., Sylmar, CA. Table 2 - Test properties, methods and results
Example 2 Polysulfide polymer cured with monomeric divinyl sulfone
[0331] The mixture was conducted in a 60g plastic container with a lid. Divinyl sulfone (1.22g), triethylenediamine (0.17g) and Thiokol LP-32 (33.01g, a liquid polysulfide polymer from Toray Fine Chemicals) were added to the 60g container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. The mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 14, measured according to ASTM D 2240. Example 3 Polyomer ether cured with monomeric divinyl sulfone
[0332] Divinyl sulfone (3.05g), triethylenediamine (0.39g), and Permapol® P3.1E (74.7g, a thiol-terminated polythioether polymer from PRC-Desoto International, Inc., Sylmar, CA) were added to a plastic container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm.
[0333] A part of the mixed material was cured inside the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 42, measured according to ASTM D 2240.
[0334] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 696 psi and an elongation of 933%. The tensile strength and elongation were measured according to ASTM D412. Example 4 Polythether cured with divinyl sulfone
[0335] Divinyl sulfone (3.05g), triethylenediamine (0.62g), Permapol® P3.1E (74.70g, a thiol-terminated polythiopolymer polymer from PRC-Desoto International, Inc., Sylmar, CA), and calcium carbonate (48.50g) were added to a 100 gram plastic container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm.
[0336] A part of the mixed material was cured inside the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 25, measured according to ASTM D 2240.
[0337] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform 1/8” thick sheet. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 546 psi and an elongation of 1.077%. The tensile strength and elongation were measured according to ASTM D412. Example 5 Synthesis of polythether adduct with divinyl sulfone termination
[0338] In a 300 ml 3-neck round-bottom flask equipped with a mechanical mixer, the Permapol®P3.1E thiol-terminated polythio polymer (149.40g, from PRC-Desoto International, Inc., Sylmar, CA ), divinyl sulfone (12.18g) and triethylenediamine (0.81g) were added at room temperature. The mixture was stirred for 10 minutes, resulting in a sulfone-terminated polyethylene adduct that had a viscosity of 309.0 poises. Viscosity was measured using a CAP2000 viscometer with # 6 spindle, 50 rpm. Example 6 Polythether Michael Acceptor Adduct cured with a thiol-terminated polysulfide polymer
[0339] The mixture was conducted in a 60 gram plastic container with a lid. The adduct from Example 5 (9.27 g) and Thiokol LP-980 (5.90g, a liquid polysulfide polymer, from Toray Fine Chemicals) were added to the 60 gram container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. The mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 11 and the percentage of volumetric swelling in type I jet reference fluid (JRF Type I) of cured material was 19.20%. The hardness and percentage of volumetric swelling in type I jet reference fluid (JRF Type I) were measured according to ASTM D 2240 and SAE AS5127 / 1 Section 7.4, respectively. Example 7 Michael's acceptor adduct from Politioether cured with a thiol-terminated polysulfide polymer
[0340] The mixture was conducted in a 60-gram plastic container with a lid. The adduct from Example 5 (9.27 g) and Thiokol LP-32 (9.17 g, a liquid polysulfide polymer, from Toray Fine Chemicals) were added to the 60 gram container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. The mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 24 and the percentage of volumetric swelling in type I jet reference fluid (JRF Type I) of cured material was 18.81%. The hardness and percentage of volumetric swelling in type I jet reference fluid (JRF Type I) were measured according to ASTM D 2240 and SAE AS5127 / 1 Section 7.4, respectively. Example 8 Michael's acceptor adduct from Politioether cured with a thiol-terminated polysulfide polymer
[0341] The mixture was conducted in a 60-gram plastic container with a lid. The adduct from Example 5 (9.27 g) and Thiokol LP-12 (9.17 g, a liquid polysulfide polymer, from Toray Fine Chemicals) were added to the 60 gram container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. The mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 25 and the percentage of volumetric swelling in type I jet reference fluid (JRF Type I) of cured material was 19.41%. The hardness and percentage of volumetric swelling in type I jet reference fluid (JRF Type I) were measured according to ASTM D 2240 and SAE AS5127 / 1 Section 7.4, respectively. Example 9 Michael's acceptor adduct from Politioether cured with a thiol-terminated polysulfide polymer
[0342] The mixture was carried out in a plastic container with a lid. The adduct from Example 5 (74.13 g) and Thioplast® G4 (19.12 g, a liquid polysulfide polymer, from Akzo Nobel) were added to the vessel. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 25 and the percentage of volumetric swelling in type I jet reference fluid (JRF Type I) of cured material was 18.70%. The hardness and percentage of volumetric swelling in type I jet reference fluid (JRF Type I) were measured according to ASTM D 2240 and SAE AS5127 / 1 Section 7.4, respectively.
[0343] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform 1/8” thick sheet. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 92 psi and an elongation of 181%. The tensile strength and elongation were measured according to ASTM D412. Example 10 Michael's acceptor adduct from Politioether cured with a thiol-terminated polysulfide polymer
[0344] The mixture was conducted in a plastic container with a lid. The adduct from Example 5 (74.13 g) and Thioplast® G21 (48.80 g, a liquid polysulfide polymer, from Akzo Nobel) were added to the container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 32 and the percentage of volumetric swelling in type I jet reference fluid (JRF Type I) of cured material was 18.48%. The hardness and percentage of volumetric swelling in type I jet reference fluid (JRF Type I) were measured according to ASTM D 2240 and SAE AS5127 / 1 Section 7.4, respectively.
[0345] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform 1/8” thick sheet. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 88 psi and an elongation of 107%. The tensile strength and elongation were measured according to ASTM D412. Example 11 Michael's acceptor adduct from Politioether cured with a thiol-terminated polysulfide polymer
[0346] The mixture was conducted in a plastic container with a lid. The adduct of Example 5 (55.60 g) and Thiokol LP-2 (57.48g, a liquid polysulfide polymer, from Toray Fine Chemicals) were added to the vessel. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 33 and the percentage of volumetric swelling in type I jet reference fluid (JRF Type I) of cured material was 18.06%. The hardness and percentage of volumetric swelling in type I jet reference fluid (JRF Type I) were measured according to ASTM D 2240 and SAE AS5127 / 1 Section 7.4, respectively.
[0347] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 108 psi and an elongation of 113%. The tensile strength and elongation were measured according to ASTM D412. Example 12 Michael's polythether acceptor adduct cured with a thiol-terminated polythiopolymer polymer
[0348] The mixture was carried out in a plastic container with a lid. The adduct of Example 5 (32, 56 g) and Permapol® (29, 96 g, a thiol-terminated polythio polymer from PRC-Desoto International Inc., Sylmar, CA) and triethylenediamine (0.31 g) were added to the vessel. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 31. The hardness was measured according to ASTM D 2240.
[0349] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 446 psi and an elongation of 504%. The tensile strength and elongation were measured according to ASTM D412. Example 13 Michael's polythether acceptor adduct cured with a thiol-terminated polythiopolymer polymer
[0350] A sealant was produced according to the composition shown in Table 1.Table 1 - Formulation of Example 13.

[0351] The mixture was carried out in a 100g plastic container with a lid. The adduct of Example 5 (34.17 g), Permapol®P 3.1E (29.96g, a thiol-terminated polythio polymer from PRC-Desoto International Inc., Sylmar, CA), carbon black (20.00g) , and triethylenediamine (0.32g) were added to the 100g container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days of curing, the hardness of the cured material was Shore A 43. The hardness was measured according to ASTM D 2240.
[0352] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 1810 psi and an elongation of 950%. The tensile strength and elongation were measured according to ASTM D412. Example 14 Michael's polythether acceptor adduct cured with a thiol-terminated, low-density polythiopolymer polymer
[0353] A sealant was produced according to the composition shown in Table 2.Table 2 - Formulation of Example 14

[0354] The mixture was carried out in a 100g plastic container with a lid. The adduct of Example 5 (34.17 g), Permapol®P 3.1E (29.96g, a thiol-terminated polythio polymer from PRC-Desoto International Inc., Sylmar, CA), carbon black (7.20g) , triethylenediamine (0.32g) and Dualite®E135-040D (7.20g, from Henkel) were added to the 100g container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material was Shore A 35. The hardness was measured according to ASTM D 2240.
[0355] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform 1/8” thick sheet. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 252 psi and an elongation of 772%. The tensile strength and elongation were measured according to ASTM D412. The estimated specific gravity was 0.706. Example 15 Michael's acceptor adduct of Politioether cured with a polyethioether with thiol termination and epoxy mixture
[0356] The mixture was carried out in a 60 g plastic container with a lid. The adduct of Example 5 (16.28 g) and Permapol®P3.1E (29.96g, a thiol-terminated polythio polymer from PRC-Desoto International Inc., Sylmar, CA), triethylenediamine (0.23g) and Novalac ®DENTM 431 (1.75g, an epoxy resin from Dow Chemical, Midland, MI) was added to the 60g container. The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days of curing, the hardness of the cured material was Shore A 35, measured according to ASTM D 2240.
[0357] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 446 psi and an elongation of 504%. The tensile strength and elongation were measured according to ASTM D412.
[0358] Example 16 Michael's polythether acceptor adduct cured with a thiol-terminated polythether and isocyanate mixture
[0359] The mixture was carried out in a 60 g plastic container with a lid. The adduct of Example 5 (33.04 g) and Permapol®P3.1E (38.05 g, a thiol-terminated polythio polymer from PRC-Desoto International Inc., Sylmar, CA) and an isocyanate-terminated prepolymer ( 5.0g, Example 5 of patent application No. 13 / 050,988). The container was placed in a mixer (DAC 600 FVZ) and mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was allowed to cure in the plastic container for 7 days at room temperature. After 7 days of curing, the hardness of the cured material was Shore A 35, measured according to ASTM D 2240.
[0360] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 309 psi and an elongation of 576%. The tensile strength and elongation were measured according to ASTM D412. Example 17 Results The properties of the cured compositions shown in Examples 1-16 are summarized in Table 3. In general, for aerospace sealant applications, it is desirable for a cured composition to exhibit a hardness greater than about 10 Shore A, a tensile strength greater than about 10 psi, an elongation greater than about 100% and a swelling with JRF less than about 20% by volume. Note that Examples 13 and 14 include filler, whereas other compositions contain only polymer. For compositions containing only polymer, it is generally desirable for the composition to exhibit a tensile strength greater than 80 psi and an elongation greater than 100%. Table 3 - Summary of Composition Properties
* polythether at room temperature. After 7 days, the hardness of the cured material measured in accordance with ASTM D 2240 was Shore A 24. Example 18 Michael's acceptor adduct from Politioether cured with diamine
[0361] The divinyl sulfone-terminated polyethylene adduct of Example 5 (83.99 g), isophorone diamine (4.26 g), Cab-O-Sil®M5 (3.68 g) and triethylenediamine (0.69 g) were added to a plastic container. The container was placed in a mixer (DAC 600 FVZ) and the contents mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material measured in accordance with ASTM D 2240 was Shore A 24.
[0362] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 562 psi and an elongation of 1170%. Tensile strength and elongation were measured according to ASTM D412. Example 19 Michael's acceptor adduct of Politioether cured with a diamine
[0363] The divinyl sulfone-terminated polyethylene adduct of Example 5 (83.99 g), isophorone diamine (4.26 g), Cab-O-Sil®M5 (3.68 g) and triethylenediamine (0.69 g) were added to a plastic container. The container was placed in a mixer (DAC 600 FVZ) and the contents mixed for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 7 days at room temperature. After 7 days, the hardness of the cured material measured in accordance with ASTM D 2240 was Shore A 24.
[0364] A second part of the mixed material was poured onto a 12 ”x18” x1 / 4 ”flat glass substrate and pressed to form a uniform sheet 1/8” thick. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 420 psi and an elongation of 1209%. Tensile strength and elongation were measured according to ASTM D412. Example 20 Polythether Michael acceptor adduct cured with blocked diamine
[0365] The adduct of Example 5 (16.80g), Vestamin® A 139 (1.39g, from Evonik), and triethylenediamine (0.27g) were added to a plastic container. The container was placed in a mixer (DAC 600 FVZ) and the mixing continued for 60 seconds at 2,300 rpm. A portion of the mixed material was cured in the plastic container for 5 weeks under ambient conditions. After 5 weeks, the cured mixed material formed a solid elastomer. Example 21 Preparation of Encapsulated Catalyst
[0366] 9.3 grams of Intelimer®13-6 (from Air Products and Chemicals), Allentown, PA) and 0.7 grams of isophorone diamine (3-aminomethyl-3,5,5-trimethylcyclohexylamine, Vestamin®IPD, Evonik Industries) were mixed at 80 ° C for 30 minutes. The mixture was quickly cooled to room temperature and then ground to a powder with an average particle size of 25 microns. Example 22 Preparation of Encapsulated Catalyst
[0367] 0.9 grams of Intelimer® 13-1 (from Air Products and Chemicals, Allentown, PA) and 1.0 grams of isophorone diamine were mixed at 80 ° C for 30 minutes. The mixture was quickly cooled to room temperature and then ground to a powder. Example 23 Preparation of Encapsulated Catalyst
[0368] 9.5 grams of Intelimer® 13-1 (from Air Products and Chemicals, Allentown, PA) and 0.5 grams of isophorone diamine were mixed at 80 ° C for 30 minutes. The mixture was quickly cooled to room temperature and then ground to a powder. Example 24 Synthesis of Polyethylene Adduct capped with vinyl sulfone
[0369] In a 3-ml round-bottomed flask with a capacity of 300 ml, equipped with a mechanical stirrer, polythioether polymer with Permapol® P3.1E thiol termination (149.40g, from PRC-Desoto International, Inc., Sylmar, CA), divinyl sulfone (12.18g) and triethylenediamine (0.81g) were added at room temperature. The mixture was stirred for 10 minutes, resulting in a polyethylene adduct with vinyl sulfone termination that had a viscosity of 309.0 poises. Viscosity was measured using a CAP2000 viscometer with # 6.50 RPM spindle. Example 25 Polyether Polymer Synthesis
[0370] In a 2L flask, 524.8g (3.32 mol) of diethylene glycol divinyl ether (DEG-DVE) and 706.7g (3.87 mol) of dimercaptodioxaoctane (DMDO) were mixed with 19.7g ( 0.08 mol) trialylcyanurate (TAC) and heated to 77 ° C. To the reaction mixture was added 4.6 g (0.024 mol) of an azobisnitrile free radical catalyst (Vazo® 67,2,2'-azobis (2-methylbutyronitrile), from DuPont). The reaction proceeded substantially until complete after 2 hours to give 1,250 g (0.39 mol, 100% yield) of a polythioether liquid resin having a Tg of -68 ° C and a viscosity of 65 poises. The resin had a pale yellow color and low odor.
[0371] The synthesis of polythether and other appropriate polyethers is described in U.S. Patent No. 6,172,179. Example 26 Preparation of Encapsulated Catalyst
[0372] 9.5 grams of Intelimer® 13-1 (from Air Products and Chemicals, Allentown, PA) and 0.5 grams of isophorone diamine were mixed at 80 ° C for 30 minutes. The mixture was quickly cooled to room temperature and then ground to a powder. Example 27 Thermally triggered release - Matrix encapsulation
[0373] The mixture was conducted in a plastic container with a lid. The polythioether adduct of Example 24 (20g), T-5314 (32g, a thiol-terminated intermediate comprising the polymer described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA) and the matrix encapsulated catalyst ( 1.86g) of Example 21 were added to the container. The container was placed in a mixer (DAC 600 FVZ) and the materials mixed for 10 seconds at 2,300 rpm. A portion of the mixture was heated according to the heating scheme described in Table 1 and another portion of the mixture was maintained under ambient conditions. The physical state of the sample is shown in Table 1.Table 1
Example 28 Matrix encapsulation
[0374] The mixture was conducted in a plastic container with a lid. The polythioether adduct of Example 24 (20g), T-5314 (32g, a thiol-terminated intermediate comprising the polymer described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA) and the encapsulated catalyst of Example 22 (1.86g) were added to the container. The container was placed in a mixer (DAC 600 FVZ) and the materials mixed for 10 seconds at 2,300 rpm. A portion of the mixture was heated according to the heating scheme described in Table 2 and another portion of the mixture was maintained under ambient conditions. The physical state of the sample is shown in Table 2.Table 2
Example 29 Matrix Encapsulant
[0375] The mixture was conducted in a plastic container with a lid. The polythioether adduct of Example 24 (53.79g), Permapol® P3.1E (53.27g, a thiol-terminated polymer described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA), silica (7 , 28g) and the encapsulated catalyst of Example 23 (13.45g) were added to the container. The container was placed in a mixer (DAC 600 FVZ) and the materials mixed for 30 seconds at 2,300 rpm. A portion of the mixed material was transferred to five separate metal cans. Each can contained about 11 grams of the mixed material. Three of the five cans were heated in an oven at variable temperatures and times as shown in Figure 1. Two of the five cans were heated through an infrared heater for 3 minutes and 5 minutes, respectively. The hardness values were measured on the material after it was exposed to heat. Figure 1 shows the results.
[0376] A second part of the mixed material was exposed to environmental conditions for 4 days. After 4 days, the mixed material was still workable. Example 30 Matrix Encapsulant - Ultrasonic Release
[0377] The mixture was conducted in a plastic container with a lid. The polythioether adduct of Example 24 (11.76 g), Permapol® P3.1E (1.65g, a thiol-terminated polymer described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA), Cab- O-Sil® M5 (1.46g) and the encapsulated catalyst from Example 23 (2.69g) were added to the container. The container was placed in a mixer (DAC 600 FVZ) and the materials mixed for 30 seconds at 2,300 rpm. A part of the mixed material was placed between two parts of an aluminum plate, each plate having the dimensions of 3 ”x 3” x 0.001 ”. The distance between the two plates was 0.002 ”. The set of aluminum plates containing the material mixed between them was placed in contact with the arm of an ultrasound scanner (Model 2000X, from Emerson Industrial Automation, Danbury, CT) for 3 seconds at 20 KHz. Then, the mixture between the two aluminum plates cured in 2 days.
[0378] A second part of the mixed material was exposed to environmental conditions for 4 days. After 4 days, the mixed material still remained pasty. Example 31 Photolabile Catalyst
[0379] The mixture was conducted in a plastic container with a lid. The polythioether adduct of Example 24 (50.39g), Permapol® P3.1E (46.74g, a thiol-terminated polymer described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA) and CGI 90 catalyst (1.86g, BASF photolabile amine) were added to the container. The container was placed in a high speed mixer (DAC 600 FVZ) and the materials mixed for 10 seconds at 2,300 rpm. A portion of the mixed material was left in the plastic container for 4 days at room temperature. After 4 days, the mixture was still liquid and no cure was observed.
[0380] A second part of the mixed material was poured onto a 12 ”x 18” x U ”flat glass substrate and pressed to form a uniform sheet approximately 1/8” thick. The leaf was exposed to UV energy for 60 seconds using a Phoseon Firefly UV light from Phoseon Technology, Hillsboro, OR. The leaf was cured for 7 days under environmental conditions. The cured sheet had a tensile strength of 605 psi, an elongation of 987% and a hardness of 35A. Strength and elongation were measured according to ASTM D412, and hardness measured according to ASTM D 2240. Example 32 Moisture-released catalyst
[0381] The mixture was carried out in a plastic container with a lid. The polythether adduct of Example 24 (16.80g), Permapol® P3.1E (15.22g, a thiol-terminated polymer described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA) and Vestamin® A139 (0.32 g, a blocked isophorone diamine, from Evonik) were added to the container. The container was placed in a mixer (DAC 600 FVZ) and the materials mixed for 30 seconds at 2,300 rpm. A portion of the mixed material was left inside the plastic container (without exposure to moisture) for 1 day at room temperature. After 1 day, the mixture was still liquid and no cure was observed.
[0382] A second part of the mixed material was exposed to environmental conditions and allowed to cure for 8 hours under environmental conditions. The mixed material cured in the form of a solid elastomer. Comparative Example 33 Michael addition using unencapsulated triethylamine as catalyst
[0383] The mixture was conducted in a plastic container with a lid. The polythioether adduct of Example 24 (8.40g), Permapol® P3.1E (7.61g, a thiol-terminated polymer, described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA) and Cab- O-Sil® M5 (0.66 g) and triethylamine (0.16 g) were added to the container. The container was placed in a mixer (DAC 600 FVZ) and the materials mixed for 30 seconds at 2,300 rpm.
[0384] The mixed material was allowed to cure under environmental conditions. The mixed material cured in the form of a solid elastomer in 5 weeks. However, the surface of the cured polymer proved to be sticky. Example 34 Michael added using unencapsulated IPDA as Catalyst
[0385] The mixture was conducted in a plastic container with a lid. The polythioether adduct of Example 24 (8.40g), Permapol® P3.1E (7.61g, a thiol-terminated polymer, described in Example 25, from PRC-Desoto International, Inc., Sylmar, CA) and isophorone diamine (0.16g) were added to the container. The container was placed in a mixer (DAC 600 FVZ) and the materials mixed for 30 seconds at 2,300 rpm.
[0386] The mixed material was allowed to cure under environmental conditions. The mixed material cured in the form of a solid elastomer in 2 hours.
[0387] Finally, it should be noted that there are alternative ways to implement the embodiments described here. Consequently, the embodiments of the present invention are to be considered illustrative and not restrictive. In addition, the claims are not restricted to the details presented, but are based on their broad scope and equivalents.

权利要求:
Claims (15)
[0001]
1. Polythether adduct, characterized by the fact that it comprises at least two terminal acceptor groups of Michael, the polythether adduct being selected from a Formula (3) polythether adduct, from a Formula (3a) polythether adduct, and a combination thereof: R6 — S — R1— [—S— (CH2) p — O— (R2 — O) m— (CH2) 2 — S — R1—] n — S — R6 (3) { R6 — S — R1— [—S— (CH2) p — O— (R2 — O) m— (CH2) 2 — S — R1—] n — S — V '-} zB (3a) where: each R1 is independently selected from C2-10 alkanodiyl, C6-8 cycloalkanodiyl, C6-10 alkanocycloalkanodiyl, C5-8 heterocycloalkanodiyl, and - [(- CHR3—) s — X—] q - (- CHR3—) r, where: s is an integer number of 2a6; q is a whole number from 1 to 5; r is a whole number from 2 to 10; each R3 is independently selected from hydrogen and methyl; and each X is independently selected from -O-, -S-, and -NHR-, where R is selected from hydrogen and methyl; each R2 is independently selected from C1-10 alkanodiyl, C6-8 cycloalkanodiyl, C6-14 alkanocycloalkanodiyl, and - [(- CHR3—) s — X—] q - (- CHR3—) r—, where s, q, r , R3, and X are as defined for R1; m is a whole number from 0 to 50; n is a whole number from 1 to 60; p is an integer number from 2 to 6; It represents a nucleus of a polyfunctionalizing agent B (-V) z with vinyl termination, valence-z, where: z is an integer from 3 to 6; and each V is a group comprising a terminal vinyl group; and each -V'- is derived from the reaction of -V with a thiol; and each R is independently selected from a vinyl ketone, a vinyl sulfone, a quinone, an enamine, a satinine, an aldimine, and an oxazolidine.
[0002]
2. Polythioether adduct according to claim 1, characterized in that each R6 is independently selected from a vinyl sulfone.
[0003]
3.Polythioether adduct, according to claim 1, characterized in that each R6 has the structure of Formula (2): -CH2-C (R4) 2-S (O) 2-C (R4) 2 = CH2 (2) where each R4 is independently selected from hydrogen and C1-3 alkyl.
[0004]
4. Polythioether adduct according to claim 1, characterized in that the adduct comprises the reaction products of reagents comprising: (a) a polyether polymer; and (b) a compound having a Michael acceptor group and a group that is reactive with a polythioether polymer end group, the Michael acceptor group being selected from a vinyl ketone, a vinyl sulfone, a quinone, an enamine , a ketimine, an aldimine, and an oxazolidine.
[0005]
5. Polythioether adduct according to claim 4, characterized by the fact that the polythioether polymer where: each R1 is independently selected from C2-10 alkanodiyl, C6-8 cycloalkanodiyl, C6-14 alkanocycloalkanidiyl, C5-8 heterocycloalkanodiyl, and [( - CHR3—) s — X—] q— (- CHR3—) r—, where: s is an integer number from 2 to 6; q is a whole number from 1 to 5; r is a whole number from 2 to 10; each R3 is independently selected from hydrogen and methyl; and each X is independently selected from -O-, -S- and -NHR-, where R is selected from hydrogen and methyl; each R2 is independently selected from C1-10 alkanodiyl, C6-8 cycloalkanodiyl, C6-14 alkanocycloalkanodiyl, and - [(- CHR3—) s — X—] q - (- CHR3—) r—, where s, q, r , R3, and X are as defined for R1; m is a whole number from 0 to 50; n is a whole number from 1 to 60; p is an integer number from 2 to 6; It represents a nucleus of a polyfunctionalizing agent B (-V) z with vinyl termination, valence-z, where: z is an integer from 3 to 6; and each -V is a group comprising a terminal vinyl group; and each -V'- is derived from the reaction of -V with a thiol.
[0006]
6. Polythioether adduct according to claim 4, characterized in that the compound has a Michael acceptor group and a group that is reactive with a polythioether polymer end group comprising divinyl sulfone.
[0007]
7. Composition, characterized by the fact that it comprises: (a) a polythioether polymer comprising at least two terminal reactive groups with Michael acceptor groups; and (b) a compound having at least two Michael acceptor groups.
[0008]
8. Composition according to claim 7, characterized in that the compound, containing at least two Michael acceptor groups, has a molecular weight of less than 400 Daltons.
[0009]
9. Composition according to claim 7, characterized in that a polythioether polymer comprising at least two terminal reactive groups with Michael acceptor groups comprises the polythether adduct, as defined in claim 1.
[0010]
10. Composition, characterized by the fact that it comprises: (a) a polyether ether adduct, as defined in claim 1; and (b) a curing agent comprising at least two terminal groups that are reactive with Michael acceptor groups.
[0011]
Composition according to claim 10, characterized in that the curing agent comprises a sulfur-containing polymer comprising at least two terminal groups reactive with Michael acceptor groups.
[0012]
12. Composition according to claim 10, characterized by the fact that it comprises a compound selected from a polyepoxy, a polyisocyanate having isocyanate groups that are reactive with thiol groups and that are less reactive with Michael acceptor groups, and a polysulfide adduct .
[0013]
13. Composition, characterized by the fact that it comprises: (a) a polyether ether adduct, as defined in claim 1; (b) a sulfur-containing polymer comprising at least two terminal groups reactive with Michael acceptor groups; and (c) a monomeric compound having at least two Michael acceptor groups.
[0014]
Composition according to any one of claims 7, 10 and 13, characterized in that it comprises a controlled release amine catalyst.
[0015]
Composition according to any one of claims 7, 10 and 13, characterized in that the controlled release amine catalyst is selected from a blocked amine catalyst and an encapsulating matrix comprising an amine catalyst.

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WO2013192480A3|2014-02-13|

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法律状态:
2018-03-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2018-03-20| B06I| Publication of requirement cancelled [chapter 6.9 patent gazette]|Free format text: ANULADA A PUBLICACAO CODIGO 6.6.1 NA RPI NO 2462 DE 13/03/2018 POR TER SIDO INDEVIDA. |

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2020-03-10| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2021-01-05| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2021-03-09| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 21/06/2013, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US13/529,237|2012-06-21|

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US13/529,237|US8871896B2|2012-06-21|2012-06-21|Michael addition curing chemistries for sulfur-containing polymer compositions|

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US13/659,152|2012-10-24|

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PCT/US2013/046948|WO2013192480A2|2012-06-21|2013-06-21|Michael addition curing chemistries for sulfur-containing polymer compositions|

---