COMPOSITION

专利摘要:
summary? composition? the invention provides functionalized block composites and crystalline block composites as compatibilizers. in particular, the invention provides compositions of at least three polymers and a compatibilizer. the compatibilizer comprises a functionalized olefin-based polymer formed from at least (a) and (b): (a) a crystalline block composite comprising: a block copolymer comprising a propylene-based crystalline block and a crystalline block ethylene based; a propylene-based crystalline polymer; and, a crystalline polymer based on ethylene; and (b) at least one functionalizing agent; or a functionalized olefin-based polymer formed from at least (a) and (b): (a) a crystalline block composite comprising: a block copolymer comprising a propylene-based crystalline block and a propylene-based block crystalline ethylene; a propylene-based crystalline polymer; and, a crystalline ethylene-based polymer; and (b) at least one functionalizing agent. 1/1
公开号:BR112014014469B1
申请号:R112014014469-9
申请日:2012-12-12
公开日:2020-09-08
发明作者:Ronald J. Weeks；Yushan Hu；Kim L. Walton；Gary R. Marchand；Michael D. Read；H. Craig Silvis
申请人:Dow Global Technologies Llc；
IPC主号:

专利说明:

[0001] [001] This invention relates to functionalized block composites and crystalline block composites and their use as polymer compatibilizers. History of the invention
[0002] [002] Recycling has assumed an increasingly important role in product life cycles, especially in the area of product recycling. Despite a series of advances, the challenges remain in recycling fundamentally incompatible waste streams. For example, the carpet industry has developed ways to separate streams of waste by removing face threads from primary fabrics and full polymeric linings. These separations are rarely complete, leaving the problem of using mixed chains of recycled materials that are not compatible. Typically, these mixed streams involve combinations of: nylon 6, nylon 6.6, homopolymer polypropylene (PP), polyethylene (PE), other mixed polyolefins (ethylene / vinyl acetate (EVA), etc.), polyurethanes, emulsions of vinyl acetate (VAE), styrenic block copolymers (SBC) and other types of latex, polyesters, as well as fillers such as CaCO3 and coal dust and ash. Various mixtures of these materials are described in EP 0719301 B1. Similar problems are expected in arenas with artificial lawns that have more limited mixtures of the above materials.
[0003] [003] US patent No. 7,897,689 refers to functionalized interpolymers derived from olefin-based interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form one interpolymer product having unique physical properties. Functionalized olefinic interpolymers contain two or more segments or regions (blocks) resulting in unique processing and physical properties.
[0004] [004] US patent application publication No. US2010-0093942 relates to compositions of polyolefin mixtures of polar and / or non-polar polymers, with at least one functionalized polyolefin polymer selected from the group consisting of: polyolefinic polymers functionalized with amine, hydroxyl, imine, anhydride, or carboxylic acid. Also disclosed are methods for preparing the functionalized polyolefinic polymer and materials and articles containing at least one component prepared from such compositions.
[0005] [005] US patent No. 7,622,529 refers to olefinic interpolymers as compatibilizers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form a product interpolymer having physical properties unique. Functionalized olefinic interpolymers contain two or more segments or regions (blocks) resulting in unique processing and physical properties.
[0006] [006] WO / 2011/041696 refers to block composites and their use as impact modifiers; WO / 2011/041698 refers to block composites in soft compounds; and WO / 2011/041699 refers to block composites in thermoplastic vulcanized materials. Summary of the invention
[0007] [007] The invention provides a composition comprising: (a) a first polymer; (b) a second polymer; (c) a third polymer; and, (d) a compatibilizer, the compatibilizer being: (I) a functionalized olefin-based polymer formed from at least (A) and (B): (A) a block composite comprising: (1) a block copolymer comprising a propylene-based crystalline block and an ethylene / α-olefin block; (2) a crystalline polymer based on propylene; and, (3) an ethylene / α-olefin polymer; and (B) at least one functionalizing agent; and / or (II) a functionalized olefin-based polymer formed from at least (A) and (B): (A) a crystalline block composite comprising: (1) a block copolymer comprising an alpha-crystalline block olefin and a crystalline ethylene block; (2) an alpha-olefin-based crystalline polymer; and, (3) a crystalline polymer based on ethylene; and (B) at least one functionalizing agent, the first, second and third polymers being different. Brief description of the figures
[0008] [008] Figure 1 shows the DSC profile for CBC2;
[0009] [009] Figure 2 shows the analysis of CBR2 TREF;
[0010] [010] Figure 3 shows the HTLC analysis of CBC2;
[0011] [011] Figure 4 shows the IR spectrum for MAH-g-CBC2-4;
[0012] [012] Figure 5 shows the DSC profile for MAH-g-CBC2-4;
[0013] [013] Figure 6 shows the HTLC analysis for MAH-g-CBC2-4;
[0014] [014] Figure 7 shows the IR spectrum for Imida-g-CBC2-4;
[0015] [015] Figure 8 shows the tenacity against modulus for the PE / PP / PA mix data in Table 8;
[0016] [016] Figure 9 shows the backscattered SEM images for Comparative Example L, Comparative Example M and Example 12;
[0017] [017] Figure 10 shows the TEM images of Comparative Example N, Comparative Example O, Comparative Example Q and Example 12;
[0018] [018] Figure 11 shows the backscattered SEM images for Comparative Example S, Comparative Example T and Example 18; and
[0019] [019] Figure 12 shows the TEM images of Comparative Example N, Comparative Example S, Comparative Example T and Example 18. Detailed description of the invention
[0020] [020] All references to the Periodic Table of Elements refer to the Periodic Table of Elements published and registered by CRC Press, Inc., 2003. Likewise, any references to Group or Groups reflected in this Periodic Table of Elements using the IUPAC system to number groups. Unless stated to the contrary, implicit in context, or customary in the technique, all parts and percentages are based on weight and all testing methods are current as of the filing date of this disclosure. For the purposes of United States patent practice, the contents of any patent, patent application or publication mentioned here are incorporated entirely by reference (or its equivalent US version also incorporated by reference) especially with respect to the disclosure of synthetic techniques, designs product and process, polymers, catalysts, definitions (to the extent not inconsistent with any definitions provided specifically in this disclosure), and general knowledge in the art.
[0021] [021] The term "polyethylene" includes ethylene homopolymers and ethylene copolymers and one or more C3-8 α-olefins in which ethylene comprises at least 50 mole percent.
[0022] [022] The term "polypropylene" includes propylene homopolymers such as isotactic polypropylene, syndiotactic polypropylene, and propylene copolymers and one or more C2.4-8 α-olefins in which propylene comprises at least 50 molar percent. Preferably, a plurality of polymerized monomer units of at least one block or segment in the polymer (a crystalline block) comprise propylene, preferably at least 90 molar percent, more preferably at least 93 molar percent, and most preferably at least 95 percent molar. A polymer prepared primarily from a different α-olefin, such as 4-methyl-1-pentene, would similarly be called.
[0023] [023] If used, the term "crystalline" refers to a polymer or polymer block that has a first order transition or crystalline melting point (Tm) determined by differential scanning calorimetry (DSC) or equivalent technique. The term can be used in such a way as to allow exchange and / or substitution with the term "semi-crystalline".
[0024] [024] The term "crystallizable" refers to a monomer that can polymerize such that the resulting polymer is crystalline. Crystalline polymers of ethylene typically have, but are not limited to, densities from 0.89 g / cm3 to 0.97 g / cm3 and melting points of 75 ° C to 140 ° C. Crystalline propylene polymers typically have, but are not limited to, densities from 0.88 g / cm3 to 0.91 g / cm3 and melting points from 100 ° C to 170 ° C.
[0025] [025] The term "amorphous" refers to a polymer lacking a crystalline melting point.
[0026] [026] The term "isotactic" is defined as polymer repeating units having at least 70 percent of groups of five isotactics determined by NMR analysis of C. "Very isotactic" is defined as polymers having at least 90 percent percent of groups of five isotactics.
[0027] [027] The term "block copolymer" or "segmented copolymer" refers to a polymer comprising two or more chemically distinct regions or segments (referred to as "blocks") joined in a linear fashion, that is, a polymer comprising units chemically different that join (covalently linked) end-to-end with respect to the polymerized functionality, different from pendant or grafted. In a preferred embodiment, the blocks differ in the amount or type of comonomer incorporated there, in the density, in the amount of crystallinity, in the type of crystallinity (for example, polyethylene versus polypropylene), in the crystallite size attributable to a polymer of such composition, in the type of degree of tacticity (isotactic or syndiotactic), in regiorregularity or regioirregularity, in the amount of branching, including long chain branching or hyper-branching, in homogeneity, or any other chemical or physical property. The block copolymers of the invention are characterized by unique distributions of both polydispersity (PDI or Mw / Mn) and of block length distribution due, in a preferred embodiment, to the effect of exchange agents in combination with the catalysts.
[0028] [028] The term "block composite" refers to polymers comprising a soft copolymer, polymerized units in which the comonomer content is greater than 10 mol% and less than 90 mol% and preferably greater than 20 mol% and less than 80 mol%, and most preferably greater than 33 mol% and less than 75 mol%, a hard polymer, in which the monomer is present in an amount greater than 90 mol% and up to 100 mol%, and preferably greater than 93 mol% and up to 100 mol%, and more preferably greater than 95 mol% and up to 100 mol%, and most preferably greater than 98 mol% and up to 100 mol%, and a block copolymer, preferably diblocks, having a soft segment and a hard segment , the hard segment of the block copolymer having essentially the same composition as the hard polymer in the block composite and the soft segment of the block copolymer having essentially the same composition as the soft copolymer of the block composite. Block copolymers can be linear or branched. More specifically, when produced in a continuous process, the block composites desirably have PDI of 1.7 to 15, preferably 1.8 to 3.5, more preferably 1.8 to 2.2, and most preferably 1, 8 to 2.1. When produced in a batch or semi-stacked process, block composites desirably have PDI from 1.0 to 2.9, preferably from 1.3 to 2.5, more preferably from 1.4 to 2.0, and most preferably from 1.4 to 1.8. Such block composites are described, for example, in US patent publications US2011-0082257, US2011-0082258 and US2011-0082249, all published on April 7, 2011 and incorporated herein by reference with respect to the composite descriptions. in blocks, processes to prepare them and methods to analyze them.
[0029] [029] The term "crystalline block composite" (CBC) refers to polymers comprising crystalline ethylene-based polymer (CEP), a crystalline alpha-olefin-based polymer (CAOP), and a block copolymer having a crystalline ethylene block (CEB) and a crystalline alpha-olefin block (CAOB), the CEB of the block copolymer having essentially the same composition as the CEP in the block composite and the CAOB of the block copolymer having essentially the same composition of the block composite CAOP. In addition, the composition division between the amount of CEP and CAOP will be essentially the same as that between the corresponding blocks in the block copolymer. Block copolymers can be linear or branched. More specifically, each of the respective block segments may contain long chain branches, but the block copolymer segment is substantially linear as opposed to blocks containing grafts or branches. When produced in a continuous process, crystalline block composites desirably have PDI of 1.7 to 15, preferably 1.8 to 10, preferably 1.8 to 5, more preferably 1.8 to 3.5. Such composites are described in crystalline blocks, for example, in Serial US Patent Applications No. 61 / 356978,61 / 356957 and 61/356990, all deposited on June 21, 2010 and incorporated herein by reference with respect to the descriptions of block composites, processes for preparing them and methods for analyzing them.
[0030] [030] CAOB refers to very crystalline blocks of polymerized alpha-olefin units in which the monomer is present in an amount greater than 90 mol%, preferably greater than 93 mol%, more preferably greater than 95 mol%, and preferably greater than 96 mole percent. In other words, the comonomer content in CAOBs is less than 10 mole percent, and preferably less than 7 mole percent, and more preferably less than 5 mole percent, and most preferably less than 4 mole percent. Propylene crystallinity CAOBs have corresponding melting points that are greater than or equal to 80 ° C, preferably greater than or equal to 100 ° C, more preferably greater than or equal to 115 ° C, and most preferably greater than or equal to 120 ° C . In some incorporations, CAOB comprises all or substantially all of the propylene units. On the other hand, CEB refers to blocks of polymerized ethylene units in which the comonomer content is less than or equal to 10 mol%, preferably between 0 mol% and 10 mol%, more preferably between 0 mol% and 7 mol% and most preferably between 0 mol% and 5 mol%. Such CEB has corresponding melting points that are preferably greater than or equal to 75 ° C, more preferably greater than or equal to 90 ° C and greater than or equal to 100 ° C.
[0031] [031] "Hard" segments refer to very crystalline blocks of polymerized units in which the monomer is present in an amount greater than 90 mole percent, preferably greater than 93 mole percent, more preferably greater than 95 mole percent, and most preferably greater than 98 mole percent. In other words, the comonomer content in the hard segments is most preferably less than 2 molar percent, more preferably less than 5 molar percent, and preferably less than 7 molar percent, and less than 10 molar percent. In some incorporations, the hard segments comprise all or substantially all propylene units. On the other hand, "soft" segments refer to amorphous, substantially amorphous or elastomeric blocks of polymerized units in which the comonomer content is greater than 10 mol% and less than 90 mol% and preferably greater than 20 mol% and less than 80 mol%, and most preferably greater than 33 mol% and less than 75 mol%.
[0032] [032] Suitable monomers for use in the preparation of the copolymers of the present invention include any addition-curable monomer, preferably any olefinic or diolefinic monomer, more preferably any α-olefin, and most preferably propylene and at least one copolymerizable comonomer having 2 or de 4 to 20 carbons, or 1-butene and at least one different copolymerizable comonomer having 4 to 20 carbons. Preferably, the copolymers comprise propylene and ethylene. It is possible to measure the comonomer content in the block composite and in the composite polymers in crystalline blocks using any appropriate technique, preferring techniques based on nuclear magnetic resonance (NMR) spectroscopy.
[0033] [033] The block composite and crystalline block composite polymers are preferably prepared by a process comprising contacting an add-curing monomer or mixing monomers under add-curing conditions with a composition comprising at least one add-curing catalyst , a cocatalyst and a chain exchange agent, said process being characterized by the formation of at least some of the growing polymer chains under different process conditions in two or more reactors operating under steady state polymerization conditions or in two or more reactor zones operating under continuous flow polymerization conditions. In a preferred embodiment, the block composites of the invention comprise a fraction of block polymer that has a very likely distribution of block lengths.
[0034] [034] Appropriate processes useful in the production of block composites and crystalline block composites can be found, for example, in US patent application publication No. 2008/0269412, published on October 30, 2008, which is hereby incorporated by reference. In particular, the polymerization is desirably carried out as a continuous polymerization, preferably a continuous polymerization in solution, in which catalytic components, monomers, and optionally solvent, adjuvants, purgers, and polymerization aids are supplied continuously to one or more reactors or zones and the polymer product being continuously removed from them. Within the scope of the terms "continuous" and "continuously" when used in this context are those processes in which there are intermittent addition of reagents and removal of products in small regular or irregular intervals, so that, over time, the overall process is substantially continuous. In addition, as explained above, chain exchange agents can be added at any point during polymerization including in the first reactor or zone, at the outlet or just before the outlet of the first reactor, or between the first reactor or zone and the second or any subsequent reactor or zone. Due to the difference between monomers, temperatures, pressures or other differences in polymerization conditions between at least two reactors or zones connected in series, polymer segments of different compositions are formed, such as comonomer content, crystallinity, density, tactility, regioregularity, or another chemical or physical difference, within the same molecule in different reactors or zones. The size of each segment or block is determined by continuous polymerization reaction conditions, and preferably a very likely distribution of polymer sizes.
[0035] [035] When producing a block polymer having a crystalline ethylene block (CEB) and a crystalline alpha-olefin block (CAOB) in two reactors or zones, it is possible to produce CEB in the first reactor or zone and CAOB in the second reactor or zone or produce the CAOB in the first reactor or zone and the CEB in the second reactor or zone. It is more advantageous to produce CEB in the first reactor or zone with the addition of new chain exchange agent. The presence of increased levels of ethylene in the reactor or zone producing CEB will typically lead to a much higher molecular weight in that reactor or zone than in the reactor or zone producing CAOB. The new chain exchange agent will reduce the polymer Mw in the reactor or zone that produces CEB thus leading to a better overall balance between the length of the CEB and CAOB segments.
[0036] [036] When operating reactors or zones in series, it is necessary to maintain different reaction conditions such that one reactor produces CEB and the other reactor produces CAOB. Preferably, transportation of ethylene from the first reactor to the second reactor (in series) or from the second reactor back to the first reactor is minimized through a solvent and monomer recycling system. There are many possible unit operations to remove this ethylene, but because ethylene is more volatile than higher alpha-olefins, a simple way is to remove most unreacted ethylene through a quick step by reducing the effluent pressure from the reactor that produces CEB and rapid removal of ethylene. A more preferable approach is to avoid additional unit operations and to use the much greater reactivity of ethylene against higher alpha-olefins such that the conversion of ethylene through the CEB reactor approaches 100%. It is possible to control the conversion of monomers through the reactors keeping the conversion of alpha-olefin at a high level (from 90 to 95%).
[0037] [037] Catalysts and catalyst precursors suitable for use in the present invention include metal complexes such as those disclosed in WO 2005/090426, in particular, those disclosed from page 20, line 30 to page 53, line 20, which here is incorporated by reference. Suitable catalysts are also disclosed in US 2006/0199930, US 2007/0167578, US 2008/0311812, US 7,355,089 B2, or WO 2009/012215, which are incorporated herein by reference with respect to catalysts.
[0038] [038] Particularly preferred catalysts are those of the following formula:
[0039] [039] Preferably, such complexes correspond to the formula:
[0040] [040] Preferred examples of metal complexes of previous formulas include the following compounds:
[0041] [041] The compounds of the formula are especially preferred:
[0042] [042] Other suitable metal complexes are those of the formula:
[0043] [043] The versatile Lewis base complexes are conveniently prepared by metallization and ligand exchange processes involving a Group 4 metal source and the neutral polyfunctional ligand source. In addition, the complexes can also be prepared by means of an amide elimination and hydrocarbilization process starting from the corresponding Group 4 metal tetramide and a hydrocarbilizing agent, such as trimethyl aluminum. Other techniques can also be used. These complexes are known from U. S. patent disclosures 6,320,005,6,103,657.6 .953,764 and from international publications WO 02/38628 and WO 03/40195, among others.
[0044] [044] Suitable cocatalysts include those disclosed in WO 2005/090426, in particular, those disclosed on page 54, line 1 through page 60, line 12, which is incorporated herein by reference.
[0045] [045] Chain exchange agents include those disclosed in WO 2005/090426, in particular, those disclosed on page 19, line 21 through page 20, line 12, which is incorporated herein by reference. Particularly preferred chain exchange agents are dialkyl zinc compounds.
[0046] [046] Preferably, the block composite polymers comprise propylene, 1-butene or 4-methyl-1-pentene and one or more comonomers. Preferably, the block polymers of the block composites comprise in polymerized form propylene and ethylene and / or one or more comonomers of C4-20 alpha-olefins, and / or one or more additional copolymerizable comonomers or they comprise 4-methyl-1 -pentene and ethylene and / or one or more C4-20 alpha-olefin comonomers, or they comprise 1-butene and ethylene, propylene and / or one or more C5-20 alpha-olefin comonomers and / or one or plus additional copolymerizable comonomers. Additional suitable comonomers are selected from diolefins, cyclic olefins, and cyclic diolefins, halogenated vinyl compounds, and aromatic vinylidene compounds. Preferably, the monomer is propylene and the comonomer is ethylene. It is highly desirable that some or all of the polymer blocks comprise amorphous or relatively amorphous polymers such as copolymers of propylene, 1-butene or 4-methyl-1-pentene and a comonomer, especially random copolymers of propylene, 1-butene or 4- methyl-1-pentene with ethylene, and any remaining polymeric blocks (hard segments), if any, comprise predominantly propylene, 1-butene or 4-methyl-1-pentene in polymerized form. Preferably, such segments are very crystalline or stereospecific polypropylene, polybutene or poly (4-methyl-1-pentene), especially isotactic homopolymers. Additional suitable comonomers are selected from diolefins, cyclic olefins, and cyclic diolefins, halogenated vinyl compounds, and aromatic vinylidene compounds.
[0047] [047] In the case where the comonomer is ethylene, it is preferably present in an amount of 10 mol% to 90 mol%, more preferably 20 mol% to 80 mol%, and most preferably 33 mol% to 75 mol%. Preferably, the copolymers comprise hard segments that are from 90 mol% to 100 mol% of propylene. The hard segments can be greater than 90 mol%, preferably greater than 93 mol% and more preferably greater than 95 mol% of propylene, and most preferably greater than 98 mol% of propylene. Such hard segments have corresponding melting points that are greater than or equal to 80gcm, preferably greater than or equal to 100 ° C, more preferably greater than or equal to 110 ° C, and most preferably greater than or equal to 120 ° C.
[0048] [048] In some embodiments, block composites have a block composite index (BCI), as defined below, which is greater than zero, but less than about 0.4 or about 0.1 to about of 0.3. In other incorporations, BCI is greater than about 0.4 and even about 1.0. In addition, the BCI can be in the range of about 0.4 to about 0.7, about 0.5 to about 0.7, or about 0.6 to about 0.9. In some incorporations, BCI is in the range of about 0.3 to about 0.9, about 0.3 to about 0.8, or about 0.3 to about 0.7, about from 0.3 to about 0.6, from about 0.3 to about 0.5, or from about 0.3 to about 0.4. In other embodiments, BCI is in the range of about 0.4 to about 1.0, about 0.5 to about 1.0, or about 0.6 to about 1.0, about from 0.7 to about 1.0, from about 0.8 to about 1.0, or from about 0.9 to about 1.0.
[0049] [049] Block composites and crystalline block composites preferably have a Tm greater than 100 ° C, preferably greater than 120 ° C, and more preferably greater than 125 ° C. Preferably, the Tm is in the range of 100 ° C to 250 ° C, more preferably from 120 ° C to 220 ° C and also preferably in the range of 125 ° C to 220 ° C. Preferably the MFR of block composites and crystalline block composites is 0.1 to 1000 dg / min, 0.1 to 50 dg / min, 0.1 to 30 dg / min, from 1 to 12 dg / min , from 1.1 to 10 dg / min or from 1.2 to 8 dg / min. Preferably, the division between the components of the block composite or crystalline block composite is 30/70 to 70/30, or 40/60 to 60/40, or preferably 50/50.
[0050] [050] Still preferably, block composites and crystalline block composites have a weight average molecular weight (Mw) of 10,000 to about 2,500,000, preferably from 35,000 to about 1,000,000 and more preferably from 50,000 to about 300,000, preferably from 50,000 to about 200,000.
[0051] [051] Preferably the block composite polymers comprise from 0.5 to 95% by weight of soft copolymer, from 0.5 to 95% by weight of hard polymer and from 5 to 99% by weight of block copolymer. More preferably, block composite polymers comprise from 0.5 to 79% by weight of soft copolymer, from 0.5 to 79% by weight of hard polymer and from 20 to 99% by weight of block copolymer and more preferably from 0.5 to 49% by weight of soft copolymer, 0.5 to 49% by weight of hard polymer and 50 to 99% by weight of block copolymer. Weight percentages are based on the total weight of the block composite. The sum of the weight percentages of soft copolymer, hard polymer and block copolymer is equal to 100%.
[0052] [052] Preferably, the crystalline block composite polymers of the invention comprise from 0.5 to 95% by weight of CEP, from 0.5 to 95% by weight of CAOP and from 5 to 99% by weight of block copolymer . More preferably, the crystalline block composite polymers of the invention comprise 0.5 to 79% by weight of CEP, 0.5 to 79% by weight of CAOP and 20 to 99% by weight of block copolymer and more preferably the crystalline block composite polymers of the invention comprise from 0.5 to 49% by weight of CEP, from 0.5 to 49% by weight of CAOP and from 50 to 99% by weight of block copolymer. Weight percentages are based on the total weight of the crystalline block composite. The sum of the percentages by weight of CEP, CAOP and block copolymer is equal to 100%.
[0053] [053] Preferably, the block copolymers of the block composite comprise from 5 to 95 weight percent of soft blocks and from 95 to 5 weight percent of hard blocks. They may comprise from 10% by weight to 90% by weight of soft blocks and from 90% by weight to 10% by weight of hard blocks. More preferably the block copolymers comprise from 25 to 75% by weight of soft blocks and from 75 to 25% by weight of hard blocks, and even more preferably they comprise from 30 to 70% by weight of soft blocks and from 70 to 30 % by weight of hard blocks.
[0054] [054] Preferably, the block copolymers of the crystalline block composite comprise 5 to 95 weight percent crystalline ethylene (CEB) blocks and 95 to 5 weight percent crystalline alpha-olefin (CAOB) blocks . They may comprise from 10% by weight to 90% by weight of CEB and from 90% by weight to 10% by weight of CAOB. More preferably, the block copolymers comprise 25 to 75 weight percent CEB and 75 to 25 weight percent CAOB, and even more preferably they comprise 30 to 70 weight percent CEB and 70 to 30 weight percent % by weight of CAOB.
[0055] [055] In some embodiments, crystalline block composites have a crystalline block composite index (CBCI), as defined below, which is greater than zero, but less than about 0.4 or about 0.1 at about 0.3. In other incorporations, CBCI is greater than about 0.4 and even about 1.0. In some incorporations, CBCI is in the range of about 0.1 to about 0.9, about 0.1 to about 0.8, about 0.1 to about 0.7, or about 0.1 to about 0.6. In addition, CBCI can be in the range of about 0.4 to about 0.7, about 0.5 to about 0.7, or about 0.6 to about 0.9. In some incorporations, CBCI is in the range of about 0.3 to about 0.9, about 0.3 to about 0.8, or about 0.3 to about 0.7, about from 0.3 to about 0.6, from about 0.3 to about 0.5, or from about 0.3 to about 0.4. In other embodiments, CBCI is in the range of about 0.4 to about 1.0, about 0.5 to about 1.0, or about 0.6 to about 1.0, about from 0.7 to about 1.0, from about 0.8 to about 1.0, or from about 0.9 to about 1.0.
[0056] [056] Some embodiments of the present invention comprise compositions comprising 98 to 0.5% by weight of crystalline block composite and / or block composite with the remainder being polyethylene, poly (alpha-olefin), and combinations thereof. Preferably, the compositions comprise 50 to 0.5% by weight of CBC and / or BC and more preferably 15 to 0.5% by weight of CBC and / or BC.
[0057] [057] Preferred suitable BC and / or CBC resins will have melt heat values of at least about 50 Joule per gram (J / g), more preferably at least about 70 J / g, even more preferably at least at least about 80 J / g, and more preferably at least about 90 J / g, measured by DSC.
[0058] [058] Block composites and crystalline block composites are modified, for example, by grafting, hydrogenation, nitrene insertion reactions, or other functionalization reactions using functionalizing agents such as those known to those skilled in the art. Preferred functionalizations are grafting reactions using a free radical mechanism. In particular, for maleic anhydride (MAH) grafting, the level of grafting is preferably from 0.10% by weight to 1.8% by weight, more preferably from 0.5 to 1.4% by weight, most preferably from 0.7 to 1.2% by weight. For conversion of BC or CBC grafted with MAH to BC or CBC grafted with imide, the conversion is greater than 50%, more preferably greater than 70%, most preferably greater than 90% with a maximum of 100%. Preferably, the maleic anhydride functionalizing agent, peroxide, and the mine are selected.
[0059] [059] In some embodiments of the invention, the first polymer is a polyethylene, the second polymer is a polypropylene, and the third polymer is selected from the group consisting of polyamide, polyurethane and polyester.
[0060] [060] Some compositions comprise 98 to 0.5% by weight of crystalline block composite with the remainder being polyethylene, polypropylene, and a third polymer selected from PA, PU and PET, and combinations thereof. Preferably, the compositions comprise from 50 to 0.5% by weight of CBC, from 20% by weight to 2% by weight of CBC, or from 15% by weight to 0.5% by weight of CBC.
[0061] [061] Some embodiments of the present invention comprise compositions of 98 to 0.5% by weight of block composite with the remainder being polyethylene, polypropylene, and a third polymer selected from PA, PU and PET, and combinations thereof. Preferably, the compositions comprise from 50 to 0.5% by weight of BC, from 20% by weight to 2% by weight of BC, and more preferably from 15% by weight to 0.5% by weight of BC.
[0062] [062] In some embodiments, BC or CBC is present in an amount of 2% by weight to 20% by weight, a polyethylene is present in an amount of 5% by weight to 85% by weight, a polypropylene is present in an amount of 5% by weight to 40% by weight and an additional polymer is present in an amount of 5% by weight to 50% by weight based on the total weight of the polymers.
[0063] [063] Any polyethylene including, but not limited to, high density polyethylene (HDPE) or linear low density polyethylene (LLDPE) can be used such as those produced via the gaseous phase, solution, or slurry process with either a chromium catalyst (wide MWD), Ziegler-Natta catalyst (medium MWD), or metallocene or post-metallocene catalyst (narrow MWD). In addition, any LDPE homopolymer or copolymer produced via polymerization via free radicals at high pressure can be used either in an autoclave or in a tubular reactor. The polyethylene used in the present invention can be HDPE or LLDPE with densities from 0.87 to 0.98 g / cm3. In addition, polyethylene can be a low density polyethylene (LDPE) homopolymer having a density range of 0.91 to 0.94 g / cm3 or it can be copolymerized with appropriate comonomers such as vinyl acetate, mono or dicarboxylic acids α, β-ethylenically unsaturated, and combinations thereof, glycidyl methacrylate, ethyl acrylate, or butyl acrylate. LDPE copolymers containing α, β-ethylenically unsaturated mono- or dicarboxylic acids can be neutralized in a post-polymerization process with metal ions and compounds of alkali metals, alkaline earth metals, and transition metals, and combinations thereof. Particular sources of cations include, but are not limited to, metal compounds and ions of lithium, sodium, potassium, magnesium, cesium, calcium, barium, manganese, copper, zinc, tin, rare earth metals, and combinations thereof. Polyethylene can have MI from 1 to 10 to 190 ° C and be present in an amount of 5% by weight to 40% by weight, based on the total weight of polymer. Polyethylene can also be an olefinic block copolymer such as those obtainable from The Dow Chemical Company under the trade names OBCs INFUSE ™ and described, for example, in U.S. Patent Nos. 7,608,668 and 7,858,706.
[0064] [064] A polypropylene polymer used in the present invention can be any polypropylene polymer prepared via any means known to those skilled in the art or mixture of polypropylene polymers, such as a mixture of homopolymer polypropylene, a random ethylene or butene copolymer of propylene, or an impact-modified polypropylene containing either a homopolymer polypropylene or a random crystalline copolymer of ethylene and propylene combined with a rubbery ethylene / propylene copolymer. The polypropylene can have an MFR at 230 ° C of 1 to 100 and be present in an amount of 5% by weight to 40% by weight, based on the total weight of polymer. The stereoregularity of the polypropylene polymer can be isotactic, syndiotactic, or atactic.
[0065] [065] Third polymers include, but are not limited to, polyurethanes, polyamides, and polyesters and combinations thereof. Suitable polyamides include, but are not limited to, aliphatic polyamides, such as polycaprolactam (nylon 6), preferably with a density of 1.14 g / cm3 and Mw of 20,000 g / mol to 30,000 g / mol; poly (hexamethylene adipamide) (nylon 6.6), preferably with a density of 1.14 g / cm3 and Mw of 12,000 g / mol to 20,000 g / mol; poly (hexamethylene sebaçaside); and aromatic polyamides (or polyamides). Suitable polyesters include, but are not limited to, poly (ethylene terephthalate) (PET), poly (ethylene naphthalate) (PEN) (poly (ethylene 2,6-naphthalate) and polyethyleneimine (PEI). Suitable products include reaction products of at least one isocyanate or polyisocyanate with at least one polyol such as diphenyl methane diisocyanate with poly (propylene glycol).
[0066] [066] The third polymers can also be selected from the group consisting of polyethers, polyetherimides, poly (vinyl alcohols), polycarbonates, poly (lactic acids), poly (amide esters) and combinations thereof.
[0067] [067] Any of the first, second or third polymers can be derived from recycled polymers including, but not limited to, those derived from carpet materials including yarn and lining materials, artificial grass or sources such as post-consumer recycled materials and various sources of vehicle polymer. The composition of the invention can be used in applications such as, but not limited to, films, foams, molded products and applications in wires and cables.
[0068] [068] Additives can be added to the compositions, including any additives that can be used in polymeric compositions including, but not limited to, glidants, non-stick agents, plasticizers, antioxidants, UV stabilizers, dyes or pigments, fillers, lubricants, anti-fog agents, flow aids, coupling agents, cross-linking agents (crosslinkers), nucleating agents, surfactants, solvents, flame retardants, antistatic agents and combinations thereof. Testing methods
[0069] [069] MFR: The melt flow rate is measured according to ASTM D1238, Condition 230 ° C / 2.16 kg.
[0070] [070] DSC: Differential scanning calorimetry is used to measure, among other things, the melting heats of crystalline block composites and block composites and runs on a DS Instruments Q1000 from TA Instruments equipped with an RCS cooling accessory and an automatic feeding system. A flow of nitrogen purge gas of 50 mL / min is used. The sample is pressed into a thin film and melted in the press at about 190 ° C and then cooled in air to room temperature (25 ° C). Then, 3-10 mg of material is cut, weighed accurately, and placed in a light aluminum pan (approximately 50 mg) which is then closed and set. The thermal behavior of the sample is investigated with the following temperature profile: the sample is quickly heated to 190 ° C and maintained isothermally for 3 minutes in order to remove any previous thermal history. The sample is then cooled to -90 ° C at a cooling rate of 10 ° C / min and maintained at -90 ° C for 3 minutes. Then, the sample is heated to 190 ° C at a heating rate of 10 ° C / min. The cooling and second heating curves are recorded. For melting heat measurements for CBC and specific BC resins, known and routinely performed by technicians skilled in this area, the baseline for the calculation was drawn from the initial flat section before the start of melting (typically in the range of about - 10 to about 20 ° C for these types of materials) and extends to the end of the melt for the second heating curve. MAH grafting level
[0071] [071] The polymer pellets are dried in a vacuum oven at 150 ° C for 1.5 hours. The film-shaped pellets using a Carver hydraulic press at 190 ° C for 30 seconds under pressure of 3000 pounds in ambient atmosphere. IR spectra are collected using Nicolet's FTIR 6700. FTIR spectra were used to determine the level of g-MAH in each sample using a method that was calibrated against titration with tetrabutyl ammonium hydroxide (TBAOH). The weight percentage (% by weight) of g-MAH was determined from the peak height ratio at approximately 1790 cm-1 corresponding to the anhydride carbonyl section to the height of 2751 cm-1, as follows:
[0072] [072] As for TBAOH titration, 1-2 g of dry resin were dissolved in 150 ml of xylene by heating the sample to 100 ° C in a heated stirred plate. After dissolution, the sample was titrated during heating with TBAOH 0.025N m toluene / methanol 1: 1 using 10 drops of bromothymol blue as an indicator. The end point is recorded when the solution turns blue. Grafting level analysis with silane
[0073] [073] Duplicate samples are prepared by transferring approximately 3.0 grams of the pellets into small polyethylene bottles of 2 pre-cleaned drachmas. The samples are vacuum extracted at 140 ° C for 20 minutes in a vacuum oven to remove any residual, volatile or surface silane. Duplicate Si standards are prepared from your identifiable NIST standard solution in similar small vials. The standards are diluted to a volume similar to that of samples using pure water. A blank sample of the water is also prepared. The samples, standards and a blank are then analyzed for Si. Specifically, irradiation is done for 3 minutes in 250 kW reactor power. The waiting time is 9 minutes and the counting time was 270 seconds using an HPGe detector set. Si concentrations are calculated in ppm using CANBERRA software and comparative technique. Typical relative uncertainty ranges from 2% to 5% and the detection limit is less than 100 ppm. The content of trimethoxysilane vinyl is recalculated using stoichiometry, considering that the graft is made using only trimethoxysilane vinyl. Traction properties
[0074] [074] For tensile property measurements, samples are molded by compression onto 70 milliliter-thick plates (5 inches x 5 inches) with a 190 ° C Carver hydraulic press for 6 minutes at 6000 pounds in ambient atmosphere. The plates are then cooled to 50 ° C at a cooling rate of 15 ° C / min in the press under 30,000 lb-force. The stress-strain behavior in uniaxial stress is measured using microtensile specimens. The specimens are cut in a matrix of plates according to the dimensions specified in ASTM D1708. The length between sample repairs is 22 mm and the samples are stretched on an Instron at 554% min-1 (initial length between repairs) at 23 ° C. The tensile properties are reported for an average of 5 specimens. 13C nuclear magnetic resonance (NMR)
[0075] [075] Samples are prepared by adding approximately 2.7 g of a 50/50 mixture of tetrachloroethane-d2 / ortho-dichlorobenzene which is 0.025M in chromium acetyl acetonate (relaxation agent) to 0.21 g of sample in a tube 10 mm NMR. The samples are dissolved and homogenized by heating the tube and its contents to 150 ° C. Data are collected using a 400 MHz Bruker spectrometer equipped with a Bruker double DUL high temperature cryogenic probe. The data acquired using 320 transients per data file, a pulse repetition delay of 7.3 seconds (delay of 6 seconds + acquisition time of 1.3 seconds), angles of rotation of 90 °, and reverse discontinuous decoupling with sample temperature of 125 ° C. All measurements are performed on non-rotating samples in locked mode. The samples are homogenized immediately before insertion into the heated NMR sample converter (130 ° C), and are thermally equilibrated in the probe for 15 minutes before data acquisition. Gel permeation chromatography (GPC)
[0076] [076] The gel permeation chromatographic system consists of a Model PL-210 instrument from Polymer Laboratories or Model PL-210 from Polymer Laboratories. The carousel and speaker compartments are operated at 140 ° C. Three 10 micron Mixed-B columns from Polymer Laboratories are used. The solvent is 1,2,4-trichlorobenzene. The samples are prepared in a concentration of 0.1 g of polymer in 50 ml of solvent containing 200 ppm of butylated hydroxy-toluene (BHT). The samples are slightly agitated at 160 ° C for 2 hours. The injection volume is 100 mL, and the flow rate is 1.0 mL / min. Calibration of the GPC column set is performed with 21 polystyrene patterns of narrow molecular weight distribution with molecular weights ranging from 580 to 8,400,000, arranged in 6 "cocktail" mixtures, with at least a dozen separation between weights individual molecules. The standards are purchased from Polymer Laboratories (Shropshire, UK). Polystyrene standards are prepared in 0.025 g in 50 ml of solvent for molecular weights greater than or equal to 1,000,000 and 0.05 g in 50 ml of solvent for molecular weights less than 1,000,000. The polystyrene standards are dissolved at 80 ° C with slight agitation for 30 minutes. Mixtures of narrow patterns are used first and in descending order from the highest molecular weight component to minimize degradation. The maximum molecular weights of polystyrene standards are converted to molecular weights of polyethylene using the following equation (described in Williams and Ward, J. Polym. Sci., Polym. Let., 6, 621 (1968)): Mpolipropylene 0.645 (Mpolystyrene ) · Polypropylene equivalent molecular weight calculations are performed using Viscotek Version 3.0 TriSEC software. Elution fractionation with rapid temperature gradient (F-TREF)
[0077] [077] In analysis by F-TREF, the composition to be analyzed is dissolved in ortho-dichlorobenzene and allowed to crystallize in a column containing an inert support (stainless steel granules) slowly reducing the temperature to 30 ° C (at a preferred rate 0.4 ° C / min). The column is equipped with an infrared detector. Then, a curve of F-TREF chromatograms is generated by eluting the crystallized polymer sample from the column by slowly increasing the temperature of the elution solvent (o-dichlorobenzene) from 30 to 140 ° C (at a preferred rate of 1.5 ° C / min). High temperature liquid chromatography (HTLC)
[0078] [078] HTLC is performed according to the methods disclosed in U.S. Patent No. 8,076,147 and in U.S. Patent Application Publication No. 2011/152499, both of which are incorporated herein by reference. The samples are analyzed using the methodology described below.
[0079] [079] A GPCV2000 high temperature SEC chromatograph from Waters was reconfigured to build the HT-2DLC instrument cluster. Two LC-20AD Shimadzu pumps were connected to the injector valve in GPCV2000 through a binary mixer. The first dimension (D1) of the HPLC column was connected between the injector and a 10-port change valve (Valco Inc.). The second dimension (D2) of the SEC column was connected between the 10-hole valve on LS (Varian Inc.), IR (concentration and composition), RI (refractive index), and IV (intrinsic viscosity) detectors. IR and IV were joined with detector in GPCV2000. The IR5 detector was provided by PolymerChar, Valencia, Spain. Columns: Column D1 was a high temperature (2.1 x 100 mm) HYPERCARB graphite column purchased from Thermo Scientific. Column D2 was a PLRapid-H column purchased from Varian (10 x 100 mm). Reagents: HPLC grade trichlorobenzene (TCB) was purchased from Fisher Scientific. Dean and 1-decanol were purchased from Aldrich.2,6-ditherciobutyl-4-methyl-phenol (Ionol) was also purchased from Aldrich. Sample preparation: 0.01-0.15 g of polyolefin sample was placed in a small 10 ml Waters automatic sampler vial. Then, 7 ml of 1-decanol or decane with 200 ppm Ionol was added. After spraying helium in the small sample bottle for about 1 minute, the small sample bottle was placed on a heated vibrator with a temperature setting of 160 ° C. Dissolution was carried out by stirring the small flask at temperature for 2 hours. Then, the small vial was transferred to the automatic sample collector for injection. Please note that the actual volume of the solution was greater than 7 mL due to the thermal expansion of the solvent. HT-2DLC: The flow rate of D1 was 0.01 mL / min. The composition of the mobile phase was 100% of the weak eluent (1-decanol or decane) for the first 10 minutes of execution. Then, the composition was increased to 60% strong eluent (TCB) in 489 minutes. Data were collected for 489 min as the duration of the crude chromatogram. The 10-hole valve changed every three minutes producing 493/3 = 163 SEC chromatograms. A post-run gradient was used after the data acquisition time of 489 min to clean and balance the column for the following operation: Cleaning step: 1. 490 min: flow = 0.01 min; // Keep the flow rate constant at 0.01 mL / min from 0-490 min. 2. 491 min: flow = 0.20 min; // Increase the flow rate to 0.20 mL / min. 3. 492 min:% B = 100; // Increase the mobile phase composition to 100% TCB. 4. 502 min:% B = 100; // Wash the column using 2 mL of TCB. Balance step: 5. 503 min:% B = 100; // Change the mobile phase composition to 100% 1-decanol or decane. 6. 513 min:% B = 100; // Balance the column using 2 ml of weak eluent. 7. 514 min: flow = 0.2 ml / min; // Maintain a constant flow of 0.2 mL / min for 491-514 min. 8. 515 min: flow = 0.01 ml / min; // Decrease the flow rate to 0.01 mL / min.
[0080] [080] After step 8, the flow rate and mobile phase composition were the same as the initial conditions of the execution gradient.
[0081] [081] The flow rate of D2 was 2.51 mL / min. Two 60 μL handles were installed on the 10-hole change valve. 30 μL of column eluent D1 was loaded onto the SEC column with each valve change.
[0082] [082] IR, LS15 signals (15 ° light scattering signal), LS90 signals (90 ° light scattering signal), and IV (intrinsic viscosity) signals were collected by EZChrom through an analog conversion box -for digital SS420X. The chromatograms were exported in ASCII format and imported in MATLAB software created in the company for data reduction. An appropriate calibration curve of polymer composition and retention volume, of polymer is used which are similar in nature to the hard and soft blocks contained in the composite blocks being analyzed. The calibration polymers must be narrow in composition (both chemical composition and molecular weight) and cover a reasonable range of molecular weights to cover the composition of interest during the analysis. The raw data analysis was calculated as follows, the first dimension of the HPLC chromatogram was reconstructed by plotting the IR signal of each cut (from the SEC chromatogram of the total cut IR) as a function of the elution volume. . The IR against D1 elution volume was normalized by the total IR signal to obtain the weight fraction plot against D1 elution volume. The IR / measurement methyl was obtained from the reconstructed IR measurement and IR methyl chromatograms. The ratio was converted to composition using a calibration curve of% by weight of PP (per NMR) against methyl / measure obtained from SEC experiments. The Mw was obtained from the reconstructed IR and LS measurement chromatograms. The ratio was converted to Mw after calibration of the IR and LS detectors using a PE standard.
[0083] [083] The percentage by weight of isolated PP is measured as the area that corresponds to the hard block composition based on the isolated peak and retention volume determined by a composition calibration curve. Fractionation analysis of soluble xylene
[0084] [084] The heavy amount of resin is dissolved in 200 ml of o-xylene under reflux conditions for 2 hours. Then, the solution is cooled in a water bath of controlled temperature to 25 ° C to allow the insoluble fraction in xylene (XI) to crystallize. Once the solution has cooled and the insoluble fraction precipitated from the solution, the separation of the xylene-soluble fraction (XS) from the xylene-insoluble fraction is carried out by filtration through filter paper. The remaining o-xylene solution from the filtrate is evaporated. Both fractions XS and XI are dried in a vacuum oven at 100 ° C for 60 minutes and then weighed.
[0085] [085] If the temperature of crystallization of the polymer solution in soft blocks is above room temperature, the fractionation step can be performed at a temperature of 10-20 ° C above the temperature of crystallization of soft blocks, but below the temperature of crystallization of hard blocks. The separation temperature can be determined by measuring TREF or CRYSTAF described by reference, "TREF and CRYSTAF Technologies for Polymer Characterization", Encyclopedia of Analytical Chemistry, 2000, pages 80748094. This fractionation can be performed in a heated dissolution and filtration device laboratory or a fractionation instrument such as preparatory mc2 (obtainable from Polymer Char, Valencia, Spain). Calculation of the composite composite index
[0086] [086] For a block composite derived from ethylene and propylene, the insoluble fractions will contain an appreciable amount of ethylene that would not be present if the polymer was simply a mixture of iPP homopolymer and EP copolymer. To explain this "extra ethylene", a mass balance calculation can be performed to estimate a block composite index of the amount of fractions soluble and insoluble in xylene and the percentage by weight of ethylene present in each of the fractions.
[0087] [087] The sum of the ethylene weight percentages of each fraction according to equation 1 results in the overall ethylene weight percentage (in the polymer). This mass balance equation can also be used to quantify the quantity of each component in a binary or extended to ternary mixture, or mixture of "n" components. % by weight of C2lobal winsoluble (w / w C2 insoluble) + wsoluble (w / w C2 soluble) (Equation 1)
[0088] [088] Applying equations 2 to 4, the quantity of the soft block (providing the source of extra ethylene) present in the insoluble fraction is calculated. By substituting the weight percentage of C2 of the insoluble fraction on the left side of equation 2, one can calculate the weight percentage of hard iPP and the weight percentage of soft EP using equations 3 and 4. Note that the percentage in weight of the soft EP is adjusted to be equal to zero or if known differently from its DSC melting point or other composition measure, the value can be put in its place.
[0089] [089] After explaining the "additional" ethylene present in the insoluble fraction, the only way to have an EP copolymer present in the insoluble fraction, the EP polymer chain should be connected to an iPP polymer block (or else it would have been extracted in the fraction soluble in xylene). Thus, when the iPP block crystallizes, it prevents the EP block from solubilizing.
[0090] [090] To calculate the composite composite index, the relative quantity of each block must be taken into account. To approximate this, the ratio between soft EP and hard iPP is used. The ratio of the soft EP polymer and the hard iPP polymer can be calculated using Equation 2 of the total ethylene mass balance measured in the polymer. Alternatively it can also be calculated from a mass balance of monomer and comonomer consumption during polymerization. The weight fraction of the hard iPP and the weight fraction of the soft EP are calculated using Equation 2 and it is assumed that the hard iPP does not contain any ethylene. The ethylene weight percentage of the soft EP is the amount of ethylene present in the xylene-soluble fraction.
[0091] [091] For example, if an iPP / EP block composite contains a total ethylene content of 47% by weight of ethylene and is prepared under conditions to produce a soft EP polymer with 67% by weight of ethylene and a homopolymer of iPP containing zero ethylene, the amounts of soft EP and hard iPP will be 70% by weight and 30% by weight, respectively (calculated using Equations 3 and 4). If the percentage of EP is 70% by weight and that of iPP is 30% by weight, the relative ratio of EP: iPP blocks can be expressed as 2.33: 1.
[0092] [092] Hence, if someone skilled in the art performs a xylene extraction of the polymer and recovers 40% by weight of insoluble and 60% by weight of soluble, this would be an unexpected result and this would lead to the conclusion that a fraction of block copolymer was present. If the ethylene content of the insoluble fraction is subsequently measured to be 25% by weight of ethylene, Equations 2 to 4 can be solved to explain this additional ethylene and will result in 37.3% by weight of soft EP polymer and 62, 7% by weight of hard iPP polymer present in the insoluble fraction.
[0093] [093] Since the insoluble fraction contains 37.3% by weight of EP copolymer, an additional 16% by weight of iPP polymer should be added based on the EP: iPP block ratio of 2.33 :1. This causes the estimated amount of diblocks in the insoluble fraction to be 53.3% by weight. For the entire polymer (unfractionated), the composition is described as 21.3% iPP / EP diblocks, 18.7% by weight of iPP polymer, and 60% by weight of EP polymer. The term "composite composite index" (BCI) is defined here as being equal to the percentage by weight of diblocks divided by 100% (ie, weight fraction). The value of the composite block index can vary from 0 to 1, where 1 would be equal to 100% diblocks and zero would be for a material such as a traditional mixture or random copolymer. For the example described above, the block composite index for the block composite is 0.213. For the insoluble fraction, the BCI is 0.533, and for the soluble fraction, a value of zero is assigned to the BCI.
[0094] [094] Depending on the estimates made of the total polymeric composition and errors in the analytical measurements that are used to calculate the composition of the hard and soft blocks, a relative error between 5 and 10% in the computed value of the composite composite index is possible. Such estimates include the percentage by weight of ethylene in the iPP hard block measured from the melting point by DSC, NMR analysis, or process conditions; the average weight percent of ethylene in the soft block estimated from the xylene soluble composition, either by NMR, or by DSC melting point of the soft block (if detected). But in total, the block composite index calculation reasonably explains the expected amount of "additional" ethylene present in the insoluble fraction, the only way to have an EP copolymer present in the insoluble fraction, the EP polymer chain must be connected to an iPP polymer block (or else it would have been extracted in the xylene-soluble fraction). Calculation of the composite index in crystalline blocks (CBCI)
[0095] [095] Crystalline block composites having CAOP and CAOB crystalline polypropylene compounds and CEP and CEB crystalline polyethylene compounds cannot be fractionated by conventional means. Techniques based on solvent or temperature fractionation, for example, using xylan fractionation, solvent / non-solvent separation, temperature gradient elution fractionation, or crystallization elution fractionation are not able to resolve the block copolymer since CEB and CAOB co-crystallize, respectively with CEP and CAOP. However, using a method such as high temperature liquid chromatography that separates a combination of solvent / non-solvent and graphite column, you can separate crystalline polymeric species such as polypropylene and polyethylene and block copolymer.
[0096] [096] For crystalline block composites, the amount of PP isolated is less than if the polymer were a simple mixture of iPP homopolymer (in this example CAOP) and polyethylene (in this case CEP). Consequently, the polyethylene fraction contains an appreciable amount of propylene that would not be present if the polymer were simply a mixture of iPP and polyethylene. To explain this "extra propylene", a mass balance calculation can be performed to calculate a crystalline composite composite index from the quantity of the polypropylene and polyethylene fractions and the percentage of propylene weight present in each of the fractions which are separated by HTLC. Polymers contained within the crystalline block composite include diblocks of iPP-PE, unbound iPP, and unbound PE where the individual PP or PE components may contain, respectively, a smaller amount of ethylene or propylene. Composite composition in crystalline blocks
[0097] [097] A sum of the percentage by weight of propylene of each component in the polymer according to Equation 1 results in the percentage by weight of total propylene (of the entire polymer). This mass balance equation can be used to quantify the amount of iPP and PE present in the copolymer in diblocks. This mass balance equation can also be used to quantify the amount of iPP and PE in a binary or extended to a ternary mixture, or mixture of "n" components. For the crystalline block composite, the global quantity of iPP or PE is contained within the blocks present in the diblock and the polymer of iPP and PE not bound. Overall weight% of C3 = WPP (% weight of C3 PP) + WPE (% weight of C3 PE) (Equation 1) where: WPP = weight fraction of PP in the polymer; WPE = weight fraction of PE in the polymer; % by weight of C3 PP = percentage by weight of propylene in the component PP or block; % by weight of C3 PE = percentage by weight of propylene in the component PE or block.
[0098] [098] Note that the overall weight percentage of propylene (C3) is preferably measured from C NMR or some other composition measure that represents the total amount of C3 present in the entire polymer. The weight percentage by weight of propylene in the iPP block (% by weight of C3 PP) is adjusted to 100 or known differently from its melting point by DSC, NMR measurement, or estimated from another composition, that value can be put in its place. Calculation of PP to PE ratio in crystalline block composite
[0099] [099] Based on Equation 1, one can calculate the total weight fraction of PP present in the polymer using Equation 2 of the mass balance of the total C3 measured in the polymer. Alternatively, it can be calculated from a mass balance of monomer and comonomer consumption during polymerization. In total, this represents the amount of PP and PE present in the polymer regardless of whether it is present in unbound components or in the copolymer in diblocks. For a conventional mixture, the weight fraction of PP and weight fraction of PE corresponds to the amount of polymer of PP and PE present. For the crystalline block composite, it is assumed that the weight fraction ratio of PP to PE also corresponds to the average block ratio between PP and PE present in the statistical block copolymer.
[0100] [101] Applying equations 3 to 5, the amount of isolated PP that is measured by HTLC analysis is used to determine the amount of polypropylene present in the diblock copolymer. First, the isolated or separated amount in the HTLC analysis represents the "unbound PP" and its composition is representative of the hard PP block present in the diblock copolymer. Replacing the overall weight percentage of C3 of the whole polymer on the left side of Equation 3, and the weight fraction of PP (isolated from HTLC) and the weight fraction of PE (separated by HTLC) on the right side of Equation 3, the percentage in C3 weight in the PE fraction can be calculated using Equations 4 and 5. The PE fraction is described as the fraction separated from unbound PP and contains PE in diblocks and unbound. It is assumed that the composition of the isolated PP is equal to the weight percent of propylene in the iPP block as described above.
[0101] [102] The amount of% by weight of C3 in the polyethylene fraction of HTLC represents the amount of propylene present in the block copolymer fraction that is above the amount present in "unbound polyethylene".
[0102] [103] To explain the "additional" propylene present in the polyethylene fraction, the only way to have PP present in this fraction, is that the polymer chain of PP must be connected to a polymer chain of PE (or else it would have been isolated with the fraction of PP separated by HTLC). Thus, the PP block remains adsorbed with the PE block until the PE fraction is separated.
[0103] [104] The amount of PP present in the diblock is calculated using Equation 6.
[0104] [105] The amount of diblock present in this fraction of PE can be calculated assuming that the ratio of the PP block to the PE block is the same as the overall ratio of PP to PE present in the whole polymer. For example, if the overall ratio of PP to PE is 1: 1 in the whole polymer, then it will be assumed that the ratio of PP to PE in the diblock is also 1: 1. Thus, the weight fraction of diblock present in the PE fraction it would be the fraction of PP in the diblock (wPP-dibloco) multiplied by two. Another way of calculating this is by dividing the weight fraction of PP in the diblock (wPP-dibloco) by the weight fraction of PP in the whole polymer (Equation 2).
[0105] [106] To further calculate the amount of diblock present in the whole polymer, the estimated amount of diblock in the PE fraction is multiplied by the weight fraction of the measured HTLC PE fraction.
[0106] [107] To calculate the crystalline block composite index, determine the amount of block copolymer by Equation 7. To calculate the CBCI, divide the weight fraction of diblock into the PE fraction calculated using Equation 6 by the fraction global weight of PP (calculated in Equation 2) and then multiplied by the weight fraction of the PE fraction. The CBCI value can vary from 0 to 1, where 1 would be equal to 100% diblock and zero would be for a material such as a traditional mixture or random copolymer.
[0107] [108] For example, if an iPP / PE polymer contains a total of 62.5% by weight of C3 and is prepared under the conditions to produce a PE polymer with 10% by weight of C3 and an iPP polymer containing 97 , 5% by weight of C3, the weight fractions of PE and PP will be 0.400 and 0.600, respectively (calculated using Equation 2). Since the percentage of PE is 40.0% by weight and that of iPP is 60.0% by weight, the relative ratio of PE: PP blocks is expressed as 1: 1.5.
[0108] [109] Hence, if someone skilled in the art performs HTLC separation of the polymer and isolates 28% by weight of PP and 72% by weight of the PE fraction, this would be an unexpected result and this would lead to the conclusion that a copolymer fraction in blocks was present. If the C3 content of the PE fraction (% by weight of C3_fraction_PE) is subsequently calculated to be 48.9% by weight of C3 in Equations 4 and 5, the PE fraction containing the additional propylene has a weight fraction of 0.556 of PE polymer and 0.444 weight fraction of PP polymer (wdibloco_PP, calculated using Equation 6).
[0109] [110] Since the PE fraction contains 0.444 weight fraction of PP, it must be linked to an additional 0.293 weight fraction of PE polymer, based on the iPP: PE block ratio of 1.5: 1. So , the weight fraction of diblock present in the PE fraction is 0.741; additional calculation of the weight fraction of diblock present in the whole polymer is 0.533. For the entire polymer, the composition is described as 53.3% by weight of iPP / PE diblock, 28% by weight of PP polymer, and 18.7% by weight of PE polymer. The crystalline block composite index (CBCI) is the calculated weight fraction of diblock present in the entire polymer. For example, in the example described above, the CBCI for the crystalline block composite is 0.533.
[0110] [111] The crystalline block composite index (CBCI) provides an estimate of the amount of block copolymer within the crystalline block composite in the hypothesis that the ratio of CEB to CAOB within the diblock is equal to the ratio of crystalline ethylene to alpha- crystalline olefin in the global crystalline block composite. This hypothesis is valid for these copolymers in statistical olefinic blocks based on knowledge of the individual catalyst kinetics and the polymerization mechanism for the formation of diblocks via chain exchange catalysis described in the report.
[0111] [112] The CBCI calculation is based on the analytical observation that the amount of free CAOP is less than the total amount of CAOP that was produced in the polymerization. The rest of the CAOP is linked to CEB to form the copolymer in diblocks. As the fraction of PE separated by HTLC contains both CEP and the block copolymer, the observed amount of propylene for this fraction is above that of CEP. This difference can be used to calculate CBCI.
[0112] [113] Based solely on analytical observations without prior knowledge of polymerization statistics, the minimum and maximum amounts of block copolymer present in a polymer can be calculated, thus distinguishing a crystalline block composite from a simple copolymer or mixture of copolymers.
[0113] [114] The superior bond in the amount of block copolymer present within a crystalline block composite, wBD Max, is obtained by subtracting the fraction of unbound PP measured by HTLC from one as in Equation 8. This maximum assumes that the PE fraction of HTLC is entirely diblock and that all crystalline ethylene is bound to crystalline PP without any unbound PE. The only material in the CBC that is not a block is that portion of PP separated via HTLC. Max WDB = 1 - Isolated WPP (Equation 8)
[0114] [115] The lower bond in the amount of block copolymer present within a crystalline block composite, wDB Min, corresponds to the situation where little to no PE is bound to PP. This lower limit is obtained by subtracting the amount of unbound PP measured by HTLC from the total amount of PP in the sample as shown in Equation 9. WDB Min = WPP - Isolated WPP (Equation 9)
[0115] [116] In addition, the crystalline block composite index will fall between these two values: WDB Min ≤ CBCI ≤ WDB Max.
[0116] [117] Based on the polymerization mechanism for the production of crystalline block composites, CBCI represents the best estimate of the actual fraction of copolymer in diblocks in the composite. For unknown polymeric samples, wDB Min can be used to determine whether a material is a crystalline block composite. The application of this analysis for homopolymers, copolymers or mixtures is considered. For a physical mixture of PE and PP, the global weight fraction of PP must be equal to that of the wt% PP of HTLC and the lower bond in the diblock content, Equation 9, is zero. If this analysis is applied to a PP sample that does not contain PE, then both the weight fraction of PP and the amount of PP obtained from HTLC will be 100% and again the lower bond in the diblock content, Equation 9, is zero. Finally, if this analysis is applied to a PE sample that does not contain PP then both the weight fraction of PP and the fraction of PP recovered via HTLC will be zero. As the lower bond in the diblock content is not greater than zero in any of these three cases, these materials are not composite in crystalline blocks. Scanning electron microscopy (SEM)
[0117] [118] The plates used for microtensile testing are examined by SEM for phase morphology. An initial plate test piece is cut around 1 cm x 1 cm x 1.8 mm from the plate. The cut piece is sectioned in thickness direction at -120 ° C using a diamond knife on a Leica UCT microtome to obtain a block surface microtome. The block microtomes are placed in a glass dish and the microtome surface is post-colored for 10 minutes with a 0.5% aqueous solution of ruthenium tetroxide (RuO4) (purchased from Electron Microscopy Sciences) at room temperature. This is followed by coating the colored block surface with iridium for 20 seconds in a current of 20 mA in an argon atmosphere using a plasma coating machine "EMITECH KX575" in order to make the specimen conductive under an electronic beam. A Nova 600 FEI scanning electron microscope used at an acceleration voltage of 7 kV, a working distance of 6 mm, point size 4 is used to capture electronic images of reflected and secondary dispersion. Transmission electron microscopy (TEM)
[0118] [119] The compression molded plates used for the microtensile test are examined by TEM. The samples are rectified so that sections can be collected close to the sample thickness core. Rectified samples are cryogenically polished at -60 ° C to prevent dirt using a diamond knife on a Leica UCT microtome before staining. The cryogenically polished blocks are colored with the vapor phase of an aqueous solution of 2% ruthenium tetroxide for 3 hours at room temperature. The colored solution is prepared by weighing 0.2 g of hydrated ruthenium (III) chloride (RuCl3. XH2O) in a glass bottle with a screw cap and adding 10 mL of 5.25% aqueous sodium hypochlorite solution to the bottle. The samples are fixed on a glass microscope slide using double-sided tape. The slide is placed in the bottle in order to suspend the blocks about 1 inch above the coloring solution for 3 hours. Sections of approximately 100 nm in thickness of the colored sample are collected at room temperature using a diamond knife on a Leica EM UC6 microtome and placed on virgin 600 mesh TEM screens for observation. TEM images are collected using JEOL JEM-1230 operated at 100 kV acceleration voltage and photographed using Gatan-791 and 794 digital cameras.
[0119] [120] Image analysis is performed using Leica LAS3 software on 10kX TEM images. In order to allow binary image generation, manual drawing of the characteristics of the TEM prints is performed using a black SHARPIE marker. The drawn TEM images are scanned using a Hewlett Packard Scanjet G3110 to generate digital images. The digital images are imported into the Leica LAS3 program and converted into binary images by adjusting a gray level threshold to include the characteristics of interest. After measuring the characteristics in the images, the design data is exported on an Excel diffusion slide that is used to calculate the average equivalent circular diameter. Experimental
[0120] [122] Initially, charge and molecular sieve are added to the polyols, chain extender, and charge dispersant. The MDI is completely mixed with the polyol / filler, then catalyst is added and mixed. The reaction mixture is poured onto a glass plate covered with a thin sheet of PTFE and poured with a knife with an opening of 30 milliliters to produce a film. The coated glass plate is placed in an oven at 120 ° C to cure. Synthesis of crystalline block composite
[0121] [123] Catalyst-1 ([[rel-2 ', 2 "' - [(1R, 2R) -1,2-cyclohexanediyl bis (methylene oxy-O)) bis [3- (9H-carbazole-9 -yl) -5-methyl [1,, 1'-biphenyl] -2-olate-O]] (2-) dimethyl-hafnium) and cocatalyst-1, a mixture of salts of methyl di (C14-18 alkyl ) of tetrakis (penta-fluoro-phenyl) borate, prepared by reaction of a long-chain trialkylamine (ARMEEN ™ M2HT, obtainable from Akzo-Nobel, Inc.), HCl and Li [B (C6F5) 4], as substantially disclosed in USP 5,919,983, Example 2, are purchased from Boulder Scientific and used without further purification.
[0122] [124] CSA-1 (diethyl zinc or TEN) and cocatalyst-2 (modified methyl aluminoxane (MMAO)) were purchased from Akzo Nobel and used without further purification. The solvent for polymerization reactions is a hydrocarbon mixture (ISOPAR® E) obtainable from ExxonMobil Chemical Company and purified through 13-X molecular sieve beds before use.
[0123] [125] The crystalline block composite of the present Examples is designated CBC2. It is prepared using two continuous agitated tank reactors (CSTR) connected in series. The first reactor had a volume of approximately 12 gallons while the second reactor had a volume of approximately 26 gallons. Each reactor is filled hydraulically and adjusted to operate under steady state conditions. Monomers, solvent, hydrogen, catalyst-1, cocatalyst-1, cocatalyst-2 and CSA-1 are fed into the first reactor according to the following process conditions described in Table 2. The contents of the first reactor described in Table 2 flow into a second reactor in series. Additional monomers, solvent, hydrogen, catalyst-1, cocatalyst-1, and optionally, cocatalyst-2 are added to the second reactor. Table 3 shows the analytical characteristics of CBC2. Block composite synthesis
[0124] [126] Block composite samples are synthesized in two reactors in series in a similar way to crystalline block composite samples. In each case, the first reactor had a volume of approximately 12 gallons while the second reactor had a volume of approximately 26 gallons. The process conditions are contained in Table 2.
[0125] [127] The ratio of iPP to LLDPE in CBC2 is 49 to 51. The crystalline composite composite index is estimated to be 0.729. The ratio of iPP to EP in BC1 is 50 to 50. The estimated composite composite index is 0.413.
[0126] [128] Figure 1 shows the DSC profile for CBC2. The DSC profile shows a melting peak at 129 ° C that is representative of CAOP and CAOB and at 113 ° C that corresponds to CEP and CEB. The melting enthalpy observed was 115 J / g and the glass transition temperature observed was -11 ° C.
[0127] [129] Figure 2 shows the TREF analysis of CBC2. The TREF elution profile shows that CBC2 is very crystalline and unlike the DSC fusion profile, it shows little or no separation of the CEP and CAOP or the block copolymer. Only 2.4% by weight of purge was measured which also indicates the very high crystallinity of components in CBC2.
[0128] [130] Figure 3 shows HTLC analysis of CBC2. The elution profile of CBC2 by HTLC showed that 13.2% by weight of an elution peak at the beginning between 1-2 ml and 86.8% by weight of the posterior elution peak between 3-5 ml eluted. From the concentration and composition measure, it was determined that the peak elution at the beginning was isolated PP which is CAOP and representative of CAOB. This is shown by the composition profile of the percentage by weight of C3 present. The second peak and posterior elution peak is rich in C2 and shows a gradient of C3. It can be interpreted that this peak is the PE phase and contains the block copolymer and CEP. The composition gradient shows that the copolymer blocks and elutes earlier and the CEP elutes last. Preparation of MAH-g-CBC2-4
[0129] [131] A ZSK-25MC Coperion twin-screw extruder is used for the reactive extrusion process to functionalize the base plastic resins. The 25 mm diameter extruder was equipped with 12 barrel segments for a total length to diameter ratio of 48. There are 11 barrel sections independently controlled with electric heating and water cooling. Pellets are fed into the barrel 1 main extruder feed hopper using a KCLQX3 K-tron weight loss feeder. The liquid reagents were injected into the third barrel section of the extruder using an HPLC precision metering pump (Altech Model 627 HPLC pump). An organic dialkyl peroxide (Luperox 101, CAS # 78-63-7) is used as the initiator.
[0130] [132] The liquid feed to the extruder includes a solvent mixture containing maleic anhydride monomer and organic peroxide. In order to improve feeding accuracy, the peroxide and maleic anhydride powder were dissolved in methyl ethyl ketone (MEK) solvent. 300 g maleic anhydride crystals were weighed and placed in a 2 liter plastic container with a sealable lid. An equal weight of solvent MEK was weighed on a scale and added to the container with maleic anhydride. The mixture was left in the laboratory hood with a magnetic stir bar to assist the dissolution of maleic anhydride in the solvent. The ratio of maleic anhydride to peroxide for the experimental samples was kept constant at 0.02 part peroxide and 0.9 part maleic anhydride. In order to minimize the mixing time of peroxide and monomer, the peroxide was dissolved in a MEK / maleic anhydride solution prepared previously just before moving the mixture to the positive displacement pump inlet. The HPLC injection rate was 9.07 g / min. Typical injection pressures for liquids were 115-160 psi. The MEK solvent, unreacted maleic anhydride and volatile compounds were removed via a vacuum line-collector system in the barrel devolatilization orifice 11. The vacuum system was operated in a 508 mm Hg vacuum. The melt was pelletized using a GALA LPU underwater pelletizing system. A two-hole die with a water temperature of 7.2 ° C and a cutter speed of 1700 rpm was used. The polymer feed rate for the process was 6.80 kg / h with a fixed extruder spindle speed of 500 rpm and an engine torque load of 55-65%.
[0131] [133] Table 3 shows the formulations used to engraft maleic anhydride (MAH) in CBC2. Table 4 shows the process conditions for the production of CBC2 grafted with MAH. Table 5 shows the characterizations of MAH-g-CBC2.
[0132] [134] Figure 4 shows an IR spectrum for MAH-g-CBC2-4. The anhydride peak can be observed at 1785 cm-1. Figure 5 shows a typical thermogram for MAH-g-CBC2-4. The DSC profile shows a melting peak at 131 ° C that is representative of CAOP and CAOB and at 113 ° C that corresponds to CEP and CEB. The observed melting enthalpy was 103 J / g. Figure 6 shows a typical HTLC for MAH-g-CBC2-4. The elution profile of CBC2 by HTLC showed that it eluted 29% by weight of the elution peak at the beginning between 1.6-2.2 ml and 71% by weight of an elution peak at the end between 3-5 ml. From the measurement of concentration and composition, it is determined that the peak elution at the beginning isolated PP which is CAOP and representative of CAOB. This is shown by the C3 weight percent composition profile. The second peak and elution peak at the end is rich in C2 and shows a gradient of C3. It can be interpreted that this peak is the PE phase and contains the block copolymer and CEP. The composition gradient shows that the block copolymer elutes at the beginning and the CEP elutes at the end.
[0133] [136] A ZSK-92 mega mixer with 11 barrels (L / D = 45) is used to graft MAH into OBC. The OBC resin is fed with a K-Tron T-60 feeder. MAH is injected into barrel 3, orifice 1 using a LEWA pump. The peroxide / oil mixture (50/50 weight / weight) was injected into barrel 3, orifice 2 using a Sigma Prominent plunger pump. The barrel temperature is set at 80 ° C for zone 1 and 225 ° C for zones 2 to 11. A vacuum pump system is used for barrel devolatilization 9. A minimum of 20 inches of Hg is used . The spindle RPM is at 200 to 230, the torque varies from 56% to 61%. The feed rate for OBC1 is 1500 pounds / h. The feed formulation is 1.70% MAH, 0.2% peroxide / mineral oil mixture (50/50 weight / weight). The final MAH grafting level is 0.95% and the MAH-g-OBC fusion index is 8.0 (2.16 kg, 190 ° C).
[0134] [137] MAH-g-CBC2-2 and MAH-g-CBC2-4 are converted, respectively, to imide-g-CBC-2-2 and imide-g-CBC-2-4. The unit used to convert MAH-g-CBC2 into the version grafted with DEDA is a THERMO HAAKE POLYLAB, model 557-9301 (the driving unit) and HAAKE RHEOMIX 3000p, Model 557-1306 (with cylindrical mixing rotors). The control is from a Dell Pentium 4 computer (Model DHM, S / N 9D56K21) operating Windows 2002 with software owned by HAAKE that controls automatic operation of the POLYLAB driving unit and RHEOMIX mixing tanks and acquires data. For imide-g-CBC2-4, 195 g of MAH-g-CBC2-4 are weighed in 16-ounce wide-mouthed glass vases then heated in an oven at 50 ° C for 30 minutes. Three molar equivalents of DEDA (N-ethyl-ethylenediamine) per mol of anhydride are added per syringe in the vessels. Specifically, 6.3 ml (5.23 g) of DEDA are added. The jars are shaken to distribute the amine, capped slightly with Teflon-coated lids and returned to the oven for 1 hour. The jars are removed, shaken again, lids secured with electrical tape and placed inside a 1 gallon wide mouth HDPE bottle as a secondary container. The glass bottles are padded in brown crepe paper to prevent them from rolling into the secondary container. The lids of the secondary containers are sealed with electrical tape and then placed in a low profile pulverized cylinder unit STOVALL adjusted for maximum rotation speed. The jars are rotated for 2 days. When checked the next day there was still some "lost" liquid visible on the sides, so the vessels returned to the oven at 50 ° C for 2 hours. The samples are put back in the oven at 50 ° C for at least 3 hours before running.
[0135] [138] The Haake unit is set to 170 ° C, allowed to balance and the rotors are calibrated at a rotor speed of 100 rpm. Soaked pellets are added to the mixing bowl and used for 10 minutes after the hydraulic feed piston is fixed in a closed position. The vat is opened, the sample removed and allowed to cool on the Teflon sheet. Crude sample films (about 3 milliliters thick) are pressed at 160 ° C using a Carver hydraulic press and checked by FTIR (Spectrum One Perkin-Elmer) for conversion. Figure 7 shows an IR spectrum for imide-g-CBC2-4. The anhydride band (1785-1790 cm-1) is transformed into imide band at 1700-1710 cm-1 after reaction with the diamine. The disappearance of the anhydride band and imide band formation indicates that the reaction is complete. Conversion of MAH-g-OBC to imide-g-OBC
[0136] [139] To convert MAH-g-OBC to imide-g-OBC, 190 g of MAH-g-OBC are weighed in 16-ounce wide-mouthed glass vessels then heated in an oven at 50 ° C for 30 minutes. 6.1 ml of DEDA (5.12 g) are added per gas-proof syringe to the vessels. The remainder follow the same procedure used to convert MAH-g-CBC2 to imide-g-CBC2. Mixing preparation
[0137] [140] The combination of polymeric and compatibilizing components is performed in a Haake Rheomix 600 p mixer rotating at 50 rpm. The mixer is heated to 190 ° C for PU mixtures, 230 ° C for polyamide mixtures and 275 ° C for PET mixtures. Polyamide and PET are dried at 80 ° C overnight in a vacuum oven before use. The mixing is maintained for 5 min after attaching the plunger. An additional 0.2% (based on 45 g) of antioxidant B225 is added to each of the formulations.
[0138] [141] LLDPE / PP / PU mixtures with 15% by weight PU based on the sum weight of LLDPE + PP + PU.
[0139] [142] A total weight of 45 g of ingredients is added to the mixer according to the compositions shown in Table 6. These PE / PP / PU ratios mimic the composition of real artificial grass. Table 7 shows the properties related to traction.
[0140] [143] Mixtures made compatible with amine-g-CBC2 (4 and 5) gave the best final elongation and toughness without loss of tension in flow against A and B. The initial MAH grafting level did not appear to significantly affect the amine efficacy -g-CBC2. MAH-g-CBC2- (1,2,3) also showed good improvement in tensile elongation and toughness compared to Comparative Examples C, D and E. MAH-g-OBC (F) and amine-g-OBC (G) showed improvements in tensile elongation and toughness, but caused a significant reduction in stress in flow and modulus. This is due to the low modulus of the OBC material. Figure 8 shows the tenacity / modulus graph.
[0141] [145] In this example, the ratio of PE, PP and PU is balanced, which is the worst case scenario for compatibility. Table 9 shows the mix compositions. Table 10 shows the tensile properties.
[0142] [146] Mixtures made compatible with amine-g-CBC2- (7 and 9) give the best final elongation and toughness. MAH-g-CBC2- (6) also shows good improvement in tensile elongation and toughness. MAH-g-OBC (J) and amine-g-OBC (K) showed improvements in tensile elongation and toughness, but caused significant reduction in modulus. On the other hand, the combination of MAH-g-PE and MAH-g-PP (I) was not effective in improving mixing properties. 3. Mixtures of LLDPE / PP / PA with 33% by weight of PA based on the sum weight of LLDPE + PP + PA.
[0143] [147] In this example, the mixture of PE, PP and polyamide is made compatible to achieve property improvement. Table 11 shows the mix compositions. Table 12 and Figure 8 show properties related to traction.
[0144] [148] Mixtures made compatible with MAH-g-CBC2- (11 and 12) give the best final elongation and toughness. The initial MAH grafting level needs to be at least 0.45% by weight to have effective compatibility. The combination of MAH-g-PE and MAH-g-PP (P) is also effective in improving the properties of mixtures. MAH-g-OBC (Q) and MAH-g-BC1 (15) improve the tensile elongation of mixtures, but cause significant modulus reduction.
[0145] [149] Figure 9 is an electronic image of reflected dispersion showing the PE / PP / PA ternary mixture morphology. The brightness characteristics in the images are associated with the PA phase which is colored more aggressively with RuO4. The darkest features are holes in the image caused by the PA phase being removed during sectioning. Large PA particle sizes (> 25 μm) are observed with L and M mixtures, while a fine granulated PA morphology is observed in mixture 12 as a result of effective compatibilization.
[0146] [150] Figure 10 is a TEM micrograph showing the morphology of ternary mixtures of PE / PP / PA in higher resolution. Based on the applied color, the darkest domains are PE and the lightest large domains are PP. The lightest very small domains are PA. In all three examples, good dispersion and small PA domains strongly suggest the presence of good compatibility between the polyolefin phase and the PA phase. In Example 12, the PP phase shows the smallest domain size indicating that MAH-g-CBC2-4 not only effectively matches the polyolefin and PA phases, but also the PP and PE phases. Table 13 shows the particle size of Examples N, O, Q and 12.
[0147] [152] In this example, the mixture of PE, PP and PET is made compatible to achieve improved properties. Table 14 shows the mix compositions and Table 15 shows the tensile properties.
[0148] [154] MAH-g-CBC2-compatible mixtures (Examples 16,17 and 18) improve final elongation and toughness when compared to Examples S and T. MAH-g-PE (Example U) is also effective for improving mixing properties. MAH-g-OBC (Example X) shows improvements in tensile elongation of mixtures, but causes significant reduction in modulus.
[0149] [155] Figure 11 is an electronic image of reflected dispersion showing the morphology of PE / PP / PET ternary mixture. The brightness characteristics in the images are associated with the PET phase. The darkest features are holes in the image caused by the PET phase being removed during sectioning. Large PET particle sizes (> 50 μm) are observed with S and T mixtures, while fine granulated PET morphology is observed in mixture 18 as a result of effective compatibilization.
[0150] [156] Figure 12 is a TEM micrograph showing the morphology of ternary PE / PP / PET mixtures in higher resolution. Based on the applied color, the darkest matrix is PE and the lightest domains are PP. The smooth, white, and small-looking domains are PET. In all three examples, good dispersion and small PET domains strongly suggest the presence of good compatibility between the polyolefin phase and the PET phase. In Example 18 it has large PET particles due to a relatively low MAH grafting level of 0.64% compared to MAH-g-PE (MAH grafting level of 1.2% in Example U) and MAH-g- OBC (0.95% MAH grafting level in Example X). For the dispersion of PP phase, Examples X and 18 have an irregular shape and finely dispersed PP phase, while Example U shows less uniform PP dispersions with large particles. This contrast indicates that MAH-g-CBC2-4 not only effectively matches the polyolefin and PET phases, but also the PP and PE phases. Table 16 shows the particle size of PP.

权利要求:
Claims (8)
[0001]
Composition, characterized by the fact of understanding: (a) a first polymer; (b) a second polymer; (c) a third polymer; and, (d) a compatibilizer, the compatibilizer being (I) a functionalized olefin-based polymer formed from at least (A) and (B): (A) a block composite comprising: (a) a block copolymer comprising a propylene-based crystalline block and an ethylene / α-olefin block; (b) a propylene-based crystalline polymer; and, (c) an ethylene / α-olefin polymer; and (B) at least one functionalizing agent; and / or (II) a functionalized olefin-based polymer formed from at least (A) and (B): (A) a crystalline block composite comprising: (a) a block copolymer comprising a propylene-based crystalline block and a crystalline ethylene-based block; (b) a propylene-based crystalline polymer; and, (c) a crystalline ethylene-based polymer; and (B) at least one functionalizing agent, the first, second and third polymers being different.
[0002]
Composition according to claim 1, characterized in that the first polymer is a polyethylene, the second polymer is a polypropylene and the third polymer is selected from the group consisting of polyamide, polyurethane, polyester, polyethers, polyetherimides, poly (vinyl alcohols) ), polycarbonates, poly (lactic acids), polyamide esters and combinations thereof.
[0003]
Composition according to claim 1, characterized in that the compatibilizer comprises a block composite and the functionalizing agent is selected from maleic anhydride, peroxide, and amine.
[0004]
Composition according to claim 1, characterized in that the compatibilizer comprises a crystalline block composite and the functionalizing agent is selected from maleic anhydride, peroxide, and amine.
[0005]
Composition according to claim 1, characterized in that the compatibilizer is (I) and the propylene-based crystalline block comprises from 90 mol% to 100 mol% of propylene.
[0006]
Composition according to claim 1, characterized in that the compatibilizer is (II) and the propylene-based crystalline block comprises from 90 mol% to 100 molar of propylene and the crystalline ethylene-based block has a content of comonomer between 0 mol% and 7 mol%.
[0007]
Composition according to claim 1, characterized in that the compatibilizer is (I) and the functionalizing agent is maleic anhydride at a grafting level of 0.10% by weight to 1.8% by weight.
[0008]
Composition according to claim 1, characterized in that the compatibilizer is (II) and the functionalizing agent is maleic anhydride at a grafting level of 0.10% by weight to 1.8% by weight.

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法律状态:
2018-03-27| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2019-10-22| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

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2020-06-23| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

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2020-09-08| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 12/12/2012, 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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US201161570464P| true| 2011-12-14|2011-12-14|

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US61/570,464|2011-12-14|

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PCT/US2012/069190|WO2013090393A1|2011-12-14|2012-12-12|Functionalized block composite and crystalline block composite compositions as compatibilizers|

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