• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a shoe press belt comprising an elastomeric polymer with nanoparticles bound thereto by covalent bonds.
    公开号:SE535286C2
    申请号:SE0950948
    申请日:2008-07-03
    公开日:2012-06-12
    发明作者:Ville Lahdensuo
    申请人:Metso Fabrics Inc；
    IPC主号:
    专利说明:

    535 286 e.g. its strength against bending fatigue and the progression of cracking, as well as to provide hardness and wear properties. The nanoparticles are dispersed either in a curing agent or in a urethane polymer before the curing agent and the prepolymer are mixed to obtain a polyurethane. Regardless of the manner in which the nanoparticles are added, a coating contains nanoparticles in a dispersed form. The dispersion of the nanoparticles gives the polyurethane belt abrasion resistance. but inevitably degrades the elasticity of the polyurethane at the same time. Impaired elasticity means that the belt becomes more prone to cracking.
    WO 2006/040398 describes hybrid nanomaterials produced by bonding nanoparticles to different chemical groups. Such bonding is performed by cutting the nanoparticles by means of ultrasound, whereby highly reactive broken bonds created during the cutting react with the various chemical groups present. The nanoparticles consist of substances that contain carbon, such as carbon nanotubes. The chemical groups may be inorganic, organic, polymeric and biological molecules and particles. The nanoparticles are able to bind to the chemical groups through covalent and non-covalent bonds. The resulting hybrid materials are reported to exhibit good tensile strength and high electrical and thermal conductivity, and they are considered suitable for many different uses, such as paper machine rollers and support structures.
    Thus, it is desirable to provide a shoe press belt that is highly heat conductive and resistant to cracking, or if cracking occurs, its progression is substantially slower.
    BRIEF DESCRIPTION OF THE INVENTION An object of the invention is thus to provide a shoe press belt to enable a solution of the above-mentioned problems. The object of the invention is achieved with a shoe press belt which is characterized by what is stated in the independent claims. Preferred embodiments of the invention are presented in the dependent claims.
    An advantage of a shoe press belt according to the invention is that thanks to the nanoparticles in it, the shoe press belt is highly heat conductive and at the same time thanks to its net-like elastomer structure, it is elastic and stretchable, which makes the belt very resistant to cracking. DETAILED DESCRIPTION OF THE INVENTION The invention provides a novel shoe press belt, characterized in that it contains an elastomeric polymer having nanoparticles bonded thereto by a covalent bond.
    The elastomeric material used in the manufacture of the shoe press of the invention may be any elastomeric material commonly used in the manufacture of belts used in papermaking, such as polyurethane and elastic epoxy. A common feature shared by the elastomers is that they are elastic, stretchable and able to regain their original shape when a force that causes tensile stress is removed. Preferably, the invention utilizes a polyurethane elastomer. In the following, the invention will be described in more detail in the light of this preferred embodiment, although it should be understood that any elastomeric material can be used in the shoe press belt according to the invention.
    The invention uses a technique known per se for producing a polyurethane which can be used as an elastomer, in which a urethane prepolymer component having isocyanate groups (NCO) at its ends is mixed with a chain extender component with hydroxyl- (OH) or amine- (NH2) ) groups. As the name implies, the chain extender causes the prepolymer chains to be extended by combining long prepolymer chains. Typically, a chain extender is either a multifunctional alcohol, such as diol or triol, or a multifunctional amine, such as a diamine or triamine compound, which reacts with the isocyanate groups contained in a reaction mixture to form urethane or urea bonds. In the production of polyurethane used in the shoe press belt according to the invention, a quasi-polymer, a complete prepolymer or a one-shot process can be used. These methods are well known to those skilled in the art. In general, in the quasi-prepolymer process, diisocyanate is caused to partially react with a polyol to form a quasi-polymer. There is still an excess of free diisocyanate left after the prepolymerization. The remaining polyol is then added with the chain extender. In the complete prepolymer process, diisocyanate reacts completely with the polyol to form the prepolymer with less than 5%, preferably less than 0.1%, free diisocyanate. It is also possible to use a per se known "one-shot" process, which does not involve any prepolymerization phase between diisocyanate and polyol, but which comprises reacting diisocyanate, polyol and optionally also a chain extender simultaneously with each other. In an embodiment of the invention, in accordance with the quasi-prepolymer process, the urethane prepolymer component, called component A of the present invention, is formed of isocyanate and polyol so that the urethane prepolymer comprises isocyanate terminal polyol and diisocyanate which is still free of diisocyanate. In addition to the actual chain extender, the second component B, which is necessary for the production of a urethane polymer and is called component B in the present invention, also comprises a polyol. The isocyanate groups in component A are react with the amine or hydroxyl groups in component B to produce long polyurethane chains containing urea or urethane bonds. These chains can be crosslinked with biuret or allophanate bonds or with multifunctional chain extenders to achieve a crosslinked polymer structure, which enables an elastic structure typical of the polymer to be formed. The mixing ratio A: B between components A and B is e.g. 100180.
    The polyol to be used may be a polyether polyol, polyester polyol, polyether carbonate polyol or a polyester carbonate polyol.
    Polyether polyols contain, but are not limited to, polytetramethylene ether glycol (PTMEG), polypropylene glycol (PPG), polyethylene glycol (PEG), polyhexamethylene ether glycol; polyester polyols contain polyadipate of monoethylene glycol and polycaprolactone; polyether carbonates contain -O-COO- [CnHgn-O-CnHgn1-O-COO; n = 2-6, without, however, being limited thereto.
    Preferably PTMEG or polyether carbonates are used.
    As an isocyanate component, any diisocyanate that can be used in the production of polyurethanes can be used. Such diisocyanates include 4,4-, 2,4'- or 2,2'-diphenylmethane diisocyanate (MDI), a polymer of MDI (PMDI), 2,4- or 2,6-toluene diisocyanate (TDI), 1,5- naphthalene diisocyanate (ND1), bis- (4-isocyanate-cyclohexyD-methane (HQMDI), 1,6-hexane diisocyanate (HDI), isophorone diisocyanate (1PD1), 1,4-phenylene diisocyanate (PPDI), trans-1,4-cyclohexyl diyl Preferably, MDI is used. In another embodiment of the invention, in accordance with the complete prepolymer process, the urethane prepolymer component A is formed of diisocyanate and polyol so that all the polyol to be used is in component A and the amount of free diisocyanate is about 0-1% by weight. Useful diisocyanates and polyols have been presented above.In this embodiment, the second component B necessary for the preparation of a urethane polymer is a chain extender, which may be a substance as previously deionized.
    Regardless of the technique by which the polyurethane which can be used in the present invention is prepared, in said embodiments multifunctional alcohol or multifunctional amine type compounds are generally used in the preparation of polyurethanes as chain extenders, as already mentioned, and those skilled in the art will recognize such compounds. In addition to these, structures with higher functionality such as triols and triamines can be used. Examples of diol chain extenders include, but are not limited to, 1,6-hexanediol, diethylene glycol, 2-methyl-1,3-propanedioβ, 3-methyl-1-ethylene glycol, 1,2-propylene glycol, 1,3-propanediol, 1,4 -butanediol, 5-pentadiol, 2,2-dimethyl-1,3-propanediol, 2,2,4-trimethyl-1β-pentanediol, 2-methyl-2-ethyl-1,3-propanediol, 1,4-bis (hydroxyethoxy) benzene, bis (hydroxyethylene fi erephthalate, hydroquinone bis (2-hydroxyethyl) ether and combinations thereof Useful triols are, for example, trimethylolpropane and triisopropanolamine.In the present invention, a preferred chain extender of this type is 1,4-butanedio.
    Examples of diamine-type chain extenders include, but are not limited to, 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA or MBOCA), 4,4'-methylene-bis (3-chloro-2,6-diethylaniline) ( MCDEA), dimethylthiotoluenediamine (DMTDA) such as "Ethacure 300" by Albemarle Corporation, diethyltoluenediamine (DETDA) and aminobenzoate such as "Po | acure 740M" by Polaroid Corporation Preferably, MOCA or DMTDA is used.
    By nanoparticles is generally meant particles of the size 1-100 nm.
    Any particles of this size class can be used in the present invention. Materials that can be used in the shoe press belt of the present invention include clay, carbon black, silica, silicon carbide and metal oxides such as alumina. Nanoparticles that are either of one or more different types can be added to the elastomer, and they can also vary in size. In the preferred embodiment of the invention, carbon nanotubes are used. The construction of carbon nanotubes, a network formed by carbon atoms hexagonally attached to each other by covalent bonds, is very similar to the construction of grains. Carbon nanotubes can be considered to be formed by a long and narrow burr plate that has been rolled into a tubular shape. These nanotubes are called single-wall nanotubes (SWCNT). Carbon nanotubes can also be multi-wall nanotubes (MWCNT). Nanoparticles are added to the starting material used to make an elastomer in an amount to obtain a final content of about 0.1-10% by weight, preferably 0.5-3% by weight, in the elastomers.
    The bonding of the nanoparticles to the elastomeric material is achieved by using ultrasound, whereby the very stable covalent bonds, in particular the covalent carbon-carbon bonds of the nanotube tubes, are broken, and the resulting highly reactive bonds react rapidly to form a covalent bond with the reagents present. Thus, by means of nanoparticles bound to the elastomeric material by new chemical bonds, a completely new modified mesh-like elastomeric structure is obtained with the properties required by the shoe press belt according to the invention, i.e. high tensile strength and toughness. The frequency of ultrasound directed at the reaction mixture is about 20 kHz-1 MHz.
    The ultrasound treatment can be either continuous or intermittent.
    It is obvious to a person skilled in the art that the nanoparticles can be activated not only by ultrasound treatment but also in some other suitable way, e.g. chemically, to cause these particles to bond to the elastomeric material.
    The nanoparticles can be introduced into the polyurethane material by mixing them with manufacturing component B or a part thereof. Thus, in the first alternative, if component 8 comprises only one chain extender in accordance with the complete prepolymer process, the nanoparticles are added to the chain extender. The reaction mixture thus obtained containing nanoparticles is then treated with ultrasound, which results in the particles being bound to the chain extender.
    The resulting nanoparticulate chain extender is then used to make polyurethane together with the manufacturing component A. If, in addition to the chain extender, component B also comprises a polyol according to the quasi-polymer process, the nanoparticles can be added to the polyol and / or chain extender. In one embodiment of the invention, the nanoparticles are added to the polyol. In another embodiment of the invention, the nanoparticles are added to both the polyol and the chain extender. The addition can take place either to each of the polyol and the chain extender separately, or a mixture of said two materials.
    In the first alternative, the polyol and the chain extender are treated with ultrasonic treatment separately, after which they are combined to form component B. In the latter alternative, the polyol and the chain extender are combined first, after which the resulting mixture is subjected to ultrasonic treatment to produce component B. 10 15 20 25 535 286 Alternatively, the nanoparticles may be introduced into manufacturing component A or a portion thereof. In one embodiment of the invention, the nanoparticles are added to the prepolymer and treated with ultrasonic treatment. In another embodiment of the invention, the nanoparticles are added to the polyol used to make a prepolymer. In yet another embodiment of the invention, the nanoparticles are added to the diisocyanate which is then used to prepare a prepolymer. If the nanoparticles are introduced into component A, it is no longer necessary to introduce them into component B, although this is possible if a higher concentration of nanoparticles is preferred.
    In the one shot process, the nanoparticles can be introduced into one or both of the polyol and the chain extender.
    In a preferred embodiment of the invention, the nanoparticles are added to the diamine chain extender, before the chain extender is added to the reaction mixture. In any embodiment of the invention, the total amount of nanoparticles added to the polyol and / or chain extender is about 1-50% w / w.
    Without adhering to any theory, it is likely that the sonication will provide a reactive fusion of carbon nanotubes between the carbon chain of a polyol or multifunctional amine or isocyanate through a covalent carbon-carbon bond.
    The resulting elastomeric materials modified with nanoparticles are highly heat conductive. In addition, they are strong and tough thanks to their net-like structure.
    It is obvious to those skilled in the art that as technology advances, the basic idea of invention can be realized in many different ways.
    The invention and its embodiments are thus not limited to the examples described above but may vary within the scope of the claims.
    权利要求:
    Claims (9)
    [1]
    Shoe press belt comprising an elastomeric polymer with nanotube tubes bonded thereto by covalent bonds.
    [2]
    A shoe press belt according to claim 1, wherein such bonding of the nanotube tubes to the elastomeric polymer by covalent bonds is accomplished by subjecting a reaction mixture containing nanotube tubes to ultrasonic frequencies.
    [3]
    A shoe press belt according to claim 1 or 2, wherein the elastomeric polymer is polyurethane.
    [4]
    A shoe press belt according to claim 2 or 3, wherein the reaction mixture containing nanocolotube further comprises a polyol.
    [5]
    A shoe press belt according to claim 4, wherein the polyol has been modified by ultrasonic treatment and used for the production of polyurethane.
    [6]
    Shoe press belt according to claim 5, wherein the modified polyol is used together with a chain extender for the production of polyurethane.
    [7]
    A shoe press belt according to any one of claims 2-6, wherein the reaction mixture containing nanotube tubes comprises a multifunctional alcohol or multifunctional amine used as a polyurethane reaction.
    [8]
    Shoe press belt according to claim 7, wherein the chain extender is modified by ultrasonic treatment and used for the production of polyurethane.
    [9]
    A shoe press belt according to any one of the preceding claims, wherein the amount of nanotube tubes in the elastomer is about 0.1-10% by weight, preferably 0.5-3% by weight. chain extender in
    类似技术:
    公开号 | 公开日 | 专利标题
    SE535286C2|2012-06-12|A shoe press belt
    KR101167834B1|2012-07-27|Polyurethane coated belts and roll coverings comprising nanofillers
    WO2009099114A1|2009-08-13|Shoe press belt for papermaking
    TW200835577A|2008-09-01|Elastomer-modified chemical mechanical polishing pad
    JP4516583B2|2010-08-04|Shoe press belt
    US7736468B2|2010-06-15|Belts and roll coverings having a nanocomposite coating
    JP2015524359A|2015-08-24|Dielectric polyurethane film
    EP3282052A1|2018-02-14|Shoe press belt
    JP3977394B2|2007-09-19|Shoe press belt
    CN109923137A|2019-06-21|Polyurethane comprising graphene nano structure
    CN108912300A|2018-11-30|Solvent-proof polyurethane elastomer and preparation method thereof
    CN103243602B|2015-08-19|Papermaking shoe press belt
    CN1401680A|2003-03-12|Hard polyurethane casting material
    CN103243603B|2015-12-09|Papermaking shoe press belt
    JP2010116652A|2010-05-27|Shoe press belt
    US10384428B2|2019-08-20|Polyurethane roll cover for calender roll for papermaking machine
    Ramesh et al.2021|Properties and Characterization Techniques for Waterborne Polyurethanes
    EP3733960A1|2020-11-04|Shoe press belt
    US20150114584A1|2015-04-30|Roll cover and method for the production thereof
    同族专利:
    公开号 | 公开日
    SE0950948A|2009-12-09|
    FI20075517A0|2007-07-05|
    DE112008001706T5|2010-08-05|
    JP5545755B2|2014-07-09|
    WO2009004122A1|2009-01-08|
    JP2010532432A|2010-10-07|
    SE0950948L|2009-12-09|
    US8303776B2|2012-11-06|
    GB2463383B|2012-08-08|
    GB0918758D0|2009-12-09|
    FI20075517A|2009-01-06|
    GB2463383A|2010-03-17|
    FI121015B|2010-06-15|
    US20100130701A1|2010-05-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5196092A|1991-09-25|1993-03-23|Albany International Corp.|Reinforcement of coated surfaces of lnp belts|
    AT254209T|2000-06-06|2003-11-15|Heimbach Gmbh Thomas Josef|SHOE PRESS BELT FOR PAPER MACHINES|
    JP3698984B2|2000-11-10|2005-09-21|ヤマウチ株式会社|Shoe press belt|
    JP4563620B2|2001-07-18|2010-10-13|日本無線株式会社|Transmission line characteristic measuring device|
    JP2003322218A|2002-05-08|2003-11-14|Mitsuboshi Belting Ltd|Polyurethane belt|
    US20070259994A1|2003-06-23|2007-11-08|William Marsh Rice University|Elastomers Reinforced with Carbon Nanotubes|
    WO2005082993A1|2004-02-28|2005-09-09|Korea University Industry and Academy Cooperation Foundation|Clay-polyurethane nanocomposite and method for preparing the same|
    DE102004010455A1|2004-03-01|2005-09-22|Basf Ag|Thermoplastic polyurethanes containing carbon nanotubes|
    US7408005B2|2004-03-12|2008-08-05|The Goodyear Tire & Rubber Company|Hairy polymeric nanoparticles|
    DE602005022837D1|2004-03-16|2010-09-23|Albany Int Corp|POLYURETHANE-COATED BELTS WITH NANO FILLERS|
    EP1828052A4|2004-10-12|2011-06-08|Amroy Europ Oy|Novel hybride materials and related methods and devices|
    CN101137500B|2005-03-09|2011-12-14|美商艾斯登强生股份有限公司|Papermaking fabrics with contaminant resistant nanoparticle coating and method of in situ application|
    DE102005046905A1|2005-09-30|2007-04-05|Voith Patent Gmbh|Paper machine clothing|
    FI118227B|2005-10-14|2007-08-31|Tamfelt Oyj Abp|Press belts|
    US20100204364A1|2007-02-28|2010-08-12|Metso Paper, Inc.|Roll cover material, use thereof for preparing a cover layer, and method of manufacturing an elastic roll cover|
    FI121015B|2007-07-05|2010-06-15|Tamfelt Pmc Oy|The shoe press belt|US4338420A|1980-12-31|1982-07-06|Mobil Oil Corporation|Enhanced wettability of hope films|
    FI121015B|2007-07-05|2010-06-15|Tamfelt Pmc Oy|The shoe press belt|
    DE102008040728A1|2008-07-25|2010-01-28|Voith Patent Gmbh|Endless belt for processing sheet-like material webs|
    FI126363B|2008-12-12|2016-10-31|Valmet Technologies Oy|The shoe press belt|
    FI20095008A0|2009-01-07|2009-01-07|Metso Paper Inc|Roller for a fiber web machine and fiber web calender|
    US9193879B2|2010-02-17|2015-11-24|Baker Hughes Incorporated|Nano-coatings for articles|
    US8318838B2|2010-09-09|2012-11-27|Baker Hughes Incorporated|Method of forming polymer nanocomposite|
    US8314177B2|2010-09-09|2012-11-20|Baker Hughes Incorporated|Polymer nanocomposite|
    FI20115099A|2011-01-31|2012-08-01|Metso Fabrics Oy|Shoe press belts, process for making them and use in shoe press belts|
    US8642180B2|2011-05-31|2014-02-04|Sdc Technologies, Inc.|Anti-fog polyurethane coating compositions|
    US8784695B2|2011-06-30|2014-07-22|G&Cs Co., Ltd.|Method for manufacturing polyurethane nanocomposite comprising expanded graphite and composition thereof|
    US9040013B2|2011-08-04|2015-05-26|Baker Hughes Incorporated|Method of preparing functionalized graphene|
    DE102011080728A1|2011-08-10|2013-02-14|Voith Patent Gmbh|Press belt for shoe press device|
    US9428383B2|2011-08-19|2016-08-30|Baker Hughes Incorporated|Amphiphilic nanoparticle, composition comprising same and method of controlling oil spill using amphiphilic nanoparticle|
    US9441462B2|2012-01-11|2016-09-13|Baker Hughes Incorporated|Nanocomposites for absorption tunable sandscreens|
    CN104245772B|2012-02-13|2017-08-11|陶氏环球技术有限责任公司|Elastomer for paper making equipment|
    WO2014037268A1|2012-09-04|2014-03-13|Voith Patent Gmbh|Pressing strip in a paper machine|
    US9938771B2|2014-11-03|2018-04-10|Baker Hughes, A Ge Company, Llc|Initiator nanoconstituents for elastomer crosslinking and related methods|
    JP6501537B2|2015-01-16|2019-04-17|イチカワ株式会社|Shoe press belt and method for manufacturing the same|
    DE102016201344A1|2016-01-29|2017-08-03|Voith Patent Gmbh|Press cover and method for producing such|
    EP3199700B1|2016-02-01|2018-12-05|Ichikawa Co., Ltd.|Shoe press belt|
    JP6509320B1|2017-12-27|2019-05-08|ヤマウチ株式会社|Shoe press belt|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI20075517A|FI121015B|2007-07-05|2007-07-05|The shoe press belt|
    PCT/FI2008/050408|WO2009004122A1|2007-07-05|2008-07-03|Shoe press belt|
    [返回顶部]