CN101508785A - 分散体粘合剂 - Google Patents

分散体粘合剂 Download PDF

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CN101508785A
CN101508785A CNA2009101267536A CN200910126753A CN101508785A CN 101508785 A CN101508785 A CN 101508785A CN A2009101267536 A CNA2009101267536 A CN A2009101267536A CN 200910126753 A CN200910126753 A CN 200910126753A CN 101508785 A CN101508785 A CN 101508785A
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aqueous dispersion
dispersion
mixture
polyurethane
acid
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H·克劳斯
W·亨宁
W·阿恩德特
E·伊尔特
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Covestro Deutschland AG
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Bayer MaterialScience AG
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Abstract

本发明涉及分散体粘合剂。本发明涉及基于水性聚氨酯或聚氨酯-脲分散体的混合物的水性分散体粘合剂,涉及它们的制备方法,以及涉及该分散体粘合剂在粘合剂复合体的生产中的用途。

Description

分散体粘合剂
相关申请
本申请要求2008年2月15日递交的德国专利申请No.102008009517.6的权益,对于所有有用的目的将其全部并入本文作为参考。
技术领域
本发明涉及分散体粘合剂(dispersion adhesives)。
背景技术
本发明涉及基于水性聚氨酯或聚氨酯-脲分散体的混合物的水性分散体粘合剂,涉及它们的制备方法,以及涉及分散体粘合剂在粘合剂复合体的生产中的用途。
基于水性聚氨酯分散体的粘合剂在需求性工业应用中,例如在制鞋、汽车内部装修部件的粘合剂粘结、膜的层压或纺织品(textile)基材的粘结中,已经在世界范围内得到广泛应用。水性聚氨酯或聚氨酯-聚脲分散体的制备是已知的。
当将此类分散体用于基材的粘结时,常常使用热活化方法。在该方法中,将分散体施加到基材上,当水完全蒸发后,通过加热(例如利用红外辐射器)活化粘合剂层,并使其变成粘性状态。粘合剂膜变粘的温度称作活化温度。
适合热活化方法应用的基于水性聚氨酯或聚氨酯-聚脲分散体的粘合剂描述在US-A4870129中。根据该说明书,水性聚氨酯或聚氨酯-聚脲分散体能够根据丙酮方法使用二异氰酸酯的特定混合物来获得,并且可由其获得的膜能够容易地被活化。
然而,当使用聚氨酯或聚氨酯-聚脲衍生物时,也可使用湿粘结方法,也就是说在施加粘合剂之后立即进行粘结。需要机械固定将要接合的部件,直至粘合剂固化为止。这一方法通常用于木材或纺织品基材的粘结。
聚氨酯分散体的混合物也是已知的。例如,US-A6,797,764描述了特定的具有磺酸盐基团(sulfonate groups)的聚酯基聚氨酯分散体和水性脂肪族聚氨酯分散体的混合物。通过热活化方法它们显示出了对许多金属和塑料基材的良好粘合性。
本发明的目的是提供通过热活化方法和通过湿粘结方法都显示优异的粘结性能的分散体粘合剂。
令人惊奇的是,现在发现以下描述的水性聚氨酯或聚氨酯-聚脲分散体的混合物既适合作为通过热活化方法也适合作为通过湿粘结方法应用的粘合剂,并且显示出比单个组分更好的粘结强度。
发明内容
本发明一个实施方案是水性分散体(aqueous dispersion),包括以下的混合物:
A)水性聚氨酯或聚氨酯-脲分散体,包含:
I.聚合物A),由以下组成:
I(i)具有400-5000g/mol的分子量的至少一种二官能脂肪族聚酯多元醇;
I(ii)六亚甲基二异氰酸酯(HDI)和1-异氰酸根合(isocyanato)-3,3,5-三甲基-5-异氰酸根合甲基-环己烷(IPDI)的至少一种混合物;和
I(iii)两种或更多种胺类扩链剂的至少一种混合物,其中至少一种胺类扩链剂具有离子基团;
其中所述聚合物A)在干燥之后是半结晶的或结晶的并且在-65℃至-40℃的玻璃化转变温度Tg具有玻璃化转变;
B)不同于A)的水性聚氨酯或聚氨酯-脲分散体,包含:
II.聚合物B),由以下组成:
II(i)具有400-5000g/mol的分子量的至少一种二官能芳香族聚酯多元醇;
II(ii)具有62-399的分子量的至少一种二官能多元醇;
II(iii)至少一种脂肪族二异氰酸酯;和
II(iv)具有离子基团的至少一种胺类扩链剂;
其中所述聚合物B)在干燥之后是无定形的并且在-15℃至+10℃的玻璃化转变温度Tg具有玻璃化转变。
本发明的另一个实施方案是上述水性分散体,其中基于A)和B)的总重量,A)以30-90wt%的量存在,和B)以10-70wt%的量存在。
本发明的另一个实施方案是以上水性分散体,其中HDI与IPDI的摩尔比为9:1至1:9。
本发明的另一个实施方案是以上水性分散体,其中I(iii)是1,2-乙二胺和N-(2-氨基乙基)-2-氨基乙烷磺酸钠盐的混合物。
本发明的另一个实施方案是以上水性分散体,其中在所述混合物中1,2-乙二胺和N-(2-氨基乙基)-2-氨基乙烷磺酸钠盐的摩尔比为6:1至1:6。
本发明的另一个实施方案是以上水性分散体,其中II(i)是基于邻苯二甲酸和/或邻苯二甲酸酐和1,4-丁二醇和/或1,6-己二醇的聚酯多元醇。
本发明的再一个实施方案是制备以上水性分散体的方法,包括将A)和B)相互混合。
本发明的再一个实施方案是包括上述水性分散体的粘合剂组合物。
本发明的再一个实施方案是包括以上水性分散体和每个分子具有至少两个异氰酸酯基团的至少一种多异氰酸酯化合物的双组分粘合剂组合物。
本发明的再一个实施方案是包括用以上水性分散体粘结的基材和/或片状结构的粘合剂复合体。
具体实施方式
本发明因此提供水性分散体,其包括以下的混合物:
A)水性聚氨酯或聚氨酯-脲分散体,含有:
I.聚合物A),由以下组成:
I(iv)具有400-5000g/mol的分子量的至少一种二官能脂肪族聚酯多元醇;
I(v)六亚甲基二异氰酸酯(HDI)和1-异氰酸根合-3,3,5-三甲基-5-异氰酸根合甲基-环己烷(IPDI)的至少一种混合物,和
I(vi)两种或更多种胺类扩链剂的至少一种混合物,至少一种化合物带有离子基团,
其中所述聚合物A)在干燥之后是半结晶的或结晶的,在-65℃至-40℃的玻璃化转变温度Tg具有玻璃化转变;
B)不同于A)的水性聚氨酯或聚氨酯-脲分散体,含有:
II.聚合物B),由以下组成:
II(i)具有400-5000g/mol的分子量的至少一种二官能芳香族聚酯多元醇,
II(ii)具有62-399的分子量的至少一种二官能多元醇组分,
II(iii)至少一种脂肪族二异氰酸酯和
II(iv)具有离子基团的至少一种胺类扩链剂;
其中所述聚合物B)在干燥之后是无定形的,在-15℃至+10℃的玻璃化转变温度具有玻璃化转变。
根据本发明的水性分散体含有30-90wt%,优选45-75wt%,特别优选55-65wt%,最特别优选60wt%的包含聚合物A)的水性聚氨酯或聚氨酯-脲分散体,和10-70wt%,优选25-55wt%,特别优选35-45wt%,最特别优选40wt%的包含聚合物B)的水性聚氨酯或聚氨酯-脲分散体的混合物。
作为适合的二官能脂肪族聚酯多元醇A(Ii),尤其可以考虑能够按照已知方式从以下物质制备的线型聚酯二醇:脂肪族或脂环族二羧酸,例如琥珀酸、甲基琥珀酸、戊二酸、己二酸、庚二酸、辛二酸、壬二酸、癸二酸、壬烷二甲酸、癸烷二甲酸、四氢邻苯二甲酸、六氢邻苯二甲酸、环己烷二甲酸、马来酸、富马酸、丙二酸或它们的混合物,和多元醇,例如乙二醇、一缩二乙二醇、二缩三乙二醇、三缩四乙二醇、1,2-丙二醇,一缩二丙二醇、二缩三丙二醇、三缩四丙二醇、1,3-丙二醇、1,4-丁二醇、1,3-丁二醇、2,3-丁二醇、1,5-戊二醇、1,6-己二醇、2,2-二甲基-1,3-丙二醇、1,4-二羟基环己烷、1,4-二羟甲基环己烷、1,8-辛二醇、1,10-癸二醇、1,12-十二烷二醇或它们的混合物。对于聚酯的制备,除了游离羧酸,还可使用相应的多元羧酸酸酐或相应的多元羧酸的低级醇酯或它们的混合物。
优选基于琥珀酸、甲基琥珀酸、戊二酸、己二酸或马来酸和1,3-丙二醇、1,4-丁二醇或1,6-己二醇的二官能脂肪族聚酯多元醇A(Ii)。
特别优选基于己二酸和1,4-丁二醇或1,6-己二醇的二官能脂肪族聚酯多元醇A(Ii)。
最优选基于己二酸和1,4-丁二醇的二官能脂肪族聚酯多元醇A(Ii)。
二官能脂肪族聚酯多元醇A(Ii)的分子量是400-5000g/mol,优选1500-3000g/mol,特别优选1900-2500g/mol,最特别优选2100-2300g/mol。
作为异氰酸酯组分A(Iii),使用六亚甲基二异氰酸酯(HDI)和1-异氰酸根合-3,3,5-三甲基-5-异氰酸根合甲基-环己烷(IPDI)的混合物。HDI:IPDI的摩尔比优选是9:1至1:9,特别优选3:1至1:3,最特别优选2:1。
组分A(Iiii)由两种或更多种胺类扩链剂(aminic chain extenders)的混合物组成,至少一种化合物带有离子基团(ionic group)。在本发明范围内扩链剂也理解为是导致链终止的一元胺。
一元胺的例子是脂肪族和/或脂环族伯和/或仲一元胺,例如乙胺、二乙胺,异构(isomeric)丙胺和丁胺,高级线性脂肪族一元胺和脂环族一元胺如环己基胺。其它例子是氨基醇,即在一个分子中含有氨基和羟基的化合物,例如乙醇胺、N-甲基乙醇胺、二乙醇胺或2-丙醇胺。其它例子是另外带有磺酸和/或羧基基团的单氨基化合物,例如牛磺酸,甘氨酸或丙氨酸。
二氨基化合物的例子是1,2-乙二胺、1,6-六亚甲基二胺、1-氨基-3,3,5-三甲基-5-氨基甲基-环己烷(异佛尔酮二胺)、哌嗪、1,4-二氨基环己烷或双-(4-氨基环己基)-甲烷。也适合的是己二酸二酰肼、肼和水合肼。也可使用多胺如二亚乙基三胺代替二氨基化合物作为扩链组分。
其它例子是氨基醇,即在一个分子中含有氨基和羟基基团的化合物,例如1,3-二氨基-2-丙醇、N-(2-羟乙基)乙二胺或N,N-双(2-羟乙基)乙二胺。
具有离子基团(即,额外带有磺酸盐和/或羧酸盐基团(sulfonate and/orcarboxylate groups))的二氨基化合物的例子是N-(2-氨基乙基)-2-氨基乙烷磺酸/甲酸(N-(2-aminoethyl)-2-aminoethanesulfonic acid/carboxylic acid)、N-(3-氨基丙基)-2-氨基乙烷磺酸/甲酸、N-(3-氨基丙基)-3-氨基丙烷磺酸/甲酸或N-(2-氨基乙基)-3-氨基丙烷磺酸/甲酸的钠盐或钾盐。优选N-(2-氨基乙基)-2-氨基乙烷磺酸的钠盐。
混合物A(Iiii)的优选成分是二乙醇胺、1,2-乙二胺、1-氨基-3,3,5-三甲基-5-氨基甲基-环己烷(异佛尔酮二胺)、哌嗪、N-(2-羟乙基)乙二胺和N-(2-氨基乙基)-2-氨基乙烷磺酸/甲酸的钠盐。
特别优选1,2-乙二胺与N-(2-氨基乙基)-2-氨基乙烷磺酸钠盐的混合物。这一混合物优选按照6:1至1:6的摩尔比,特别优选按照2:1至1:4的摩尔比,最特别优选按照1:3至1:4的摩尔比使用。
聚合物A)在干燥之后是半结晶的(semi-crystalline)或结晶的(crystalline),在-65℃至-40℃的玻璃化转变温度Tg具有玻璃化转变,优选具有-60℃至-45℃,特别优选-55℃至-50℃的Tg。
作为适合的二官能芳香族聚酯多元醇B(IIi),尤其可以考虑能够按照已知方式从以下物质制备的线型聚酯二醇:芳香族二羧酸(aromatic dicarboxylic acids),例如对苯二甲酸、间苯二甲酸或邻苯二甲酸和它们的酸酐如邻苯二甲酸酐,和多元醇,例如乙二醇、一缩二乙二醇、二缩三乙二醇、三缩四乙二醇、1,2-丙二醇、一缩二丙二醇、二缩三丙二醇、三缩四丙二醇、1,3-丙二醇、1,4-丁二醇、1,3-丁二醇、2,3-丁二醇、1,5-戊二醇、1,6-己二醇、2,2-二甲基-1,3-丙二醇、1,4-二羟基环己烷、1,4-二羟甲基环己烷、1,8-辛二醇、1,10-癸二醇、1,12-十二烷二醇或它们的混合物。
优选基于邻苯二甲酸、邻苯二甲酸酐和1,4-丁二醇或1,6-己二醇的二官能芳香族聚酯多元醇B(IIi)。
特别优选基于邻苯二甲酸或邻苯二甲酸酐和1,6-己二醇的二官能芳香族聚酯多元醇B(IIi)。
二官能芳香族聚酯多元醇B(IIi)的分子量是400-5000g/mol,优选1500-3000g/mol,特别优选1800-2300g/mol,最特别优选1900-2100g/mol。
适合作为扩链组分B(IIii)的分子量为62-399的二官能多元醇组分例如是在A(Ii)和B(IIi)下列举的产品,前提条件是它们具有62-399道尔顿的分子量。其它适合的组分是关于聚酯多元醇的制备所提及的多元(尤其二元)醇,和低分子量聚酯二醇,例如己二酸双-(羟乙基)酯。短链二官能聚醚多元醇,例如环氧乙烷或环氧丙烷的均聚物、混合聚合物和接枝聚合物,也是合适的。
优选的扩链组分B(IIii)是1,4-丁二醇和1,6-己二醇,特别优选1,6-己二醇。
适合作为扩链组分B(IIiii)的是每个分子含有至少两个游离异氰酸酯基团的任何期望的脂肪族化合物。优选二异氰酸酯Y(NCO)2,其中Y表示具有4-12个碳原子的二价脂肪族烃基团或具有6-15个碳原子的二价脂环族烃基团。优选使用的此类二异氰酸酯的例子是四亚甲基二异氰酸酯,甲基五亚甲基二异氰酸酯,六亚甲基二异氰酸酯,十二亚甲基二异氰酸酯,1,4-二异氰酸根合-环己烷,1-异氰酸根合-3,3,5-三甲基-5-异氰酸根合甲基-环己烷,4,4’-二异氰酸根合-二环己基-甲烷或4,4’-二异氰酸根合-2,2-二环己基丙烷或它们的混合物。
特别优选六亚甲基二异氰酸酯(HDI),1-异氰酸根合-3,3,5-三甲基-5-异氰酸根合甲基-环己烷(IPDI)和4,4’-二异氰酸根合-二环己基甲烷和它们的混合物。然而,优选独立使用所述异氰酸酯(it is preferred to use the isocyanates on their own)。
最优选六亚甲基二异氰酸酯(HDI)。
具有离子基团的胺类扩链剂B(IIiv)优选是额外带有磺酸盐和/或羧酸盐基团的二氨基化合物,例如N-(2-氨基乙基)-2-氨基乙烷磺酸、N-(3-氨基丙基)-2-氨基乙烷磺酸、N-(3-氨基丙基)-3-氨基丙烷磺酸、N-(2-氨基乙基)-3-氨基丙烷磺酸或类似羧酸(analogous carboxylic acids)的钠盐或钾盐。
特别优选N-(2-氨基乙基)-2-氨基乙烷磺酸或类似羧酸的钠盐;最特别优选N-(2-氨基乙基)-2-氨基乙烷磺酸的钠盐。
具有离子基团的胺类扩链剂B(IIiv)可以独立使用或与例如在A(Iiii)下已经描述的其它胺类扩链剂一起使用。优选独立使用它们。
在干燥之后,聚合物B)是无定形的,在-15℃至+10℃的玻璃化转变温度Tg具有玻璃化转变,优选具有-10℃至+5℃,特别优选-5℃至0℃的Tg。
含有聚合物A)或B)的水性聚氨酯或聚氨酯-脲分散体具有10-70wt%,优选25-60wt%和特别优选35-55wt%的固含量。
存在于水性聚氨酯或聚氨酯-脲分散体中的聚合物A)或B)优选通过丙酮方法制备。为此,由组分A(Ii)和A(Iii)或B(IIi)、B(IIii)和B(IIiii)制备预聚物,溶解在丙酮中并用组分A(Iiii)或B(IIiv)扩链。在用水分散之后,将丙酮蒸发掉。丙酮方法的应用和实施是现有技术并且是本领域的技术人员已知的。
本发明进一步提供制备根据本发明的分散体的方法,该方法的特征在于将聚合物A)和B)的水性聚氨酯或聚氨酯-脲分散体相互混合。
采用根据本发明的分散体产生的粘结,对于通过湿粘结法所进行的山毛榉木(beech-wood)基材的单组分粘结的情况,在3天之后呈现出>4N/mm2、优选>4.2N/mm2、特别优选>4.5N/mm2的良好剥离强度。对于在100℃的热活化温度下通过热活化方法将硬质(rigid)PVC膜单组分粘结到山毛榉木的情况,在3天之后获得>34N/mm2、优选>3.5N/mm2、特别优选>3.6N/mm2的剥离强度。在本发明的范围内单组分是指没有使用额外的交联剂组分,例如异氰酸酯或碳二亚胺类。然而,根据本发明的分散体粘合剂原则上也适合于添加交联剂组分的应用。
本发明还提供了根据本发明的水性分散体在粘合剂组合物制备中的用途。
包含根据本发明的分散体的粘合剂组合物可以独立使用或与涂料和粘合剂技术中已知的粘结剂(binders)、辅助物质和添加剂一起使用,尤其是乳化剂和光稳定剂,如UV吸收剂和空间位阻胺(HALS),以及抗氧化剂、填料和助剂,例如抗沉降剂、消泡剂和/或润湿剂、流动改进剂、反应性稀释剂、增塑剂、催化剂、辅助溶剂和/或增稠剂,以及添加剂例如颜料、着色剂或mattifying agents。还可以添加增粘剂。
所述添加剂可以在即将处理之前添加到根据本发明的分散体中。然而,也可在分散粘结剂之前或期间添加至少一些所述添加剂。
能够添加到各个组分中和/或添加到整个混合物中的这些物质的选择和计量添加原则上是本领域的技术人员已知的并且能够(无需过高的支出,根据具体的应用调整)通过简单的初步试验来确定。
本发明还提供包含根据本发明的分散体和每个分子具有至少两个异氰酸酯基团的至少一种多异氰酸酯化合物的双组分(2K)粘合剂组合物。所述多异氰酸酯在使用(2K处理)之前添加。在这一情况下优选使用可在水中乳化的多异氰酸酯化合物。这些例如是在EP-A 0 206 059,DE-A 31 12 117或DE-A 100 24 624中描述的化合物。所述多异氰酸酯化合物基于水性分散体以0.1-20wt%、优选0.5-10wt%、特别优选1.5-6wt%的量使用。
根据本发明的分散体被特别用于制备适合于生产粘合剂复合体的粘合剂组合物,其中所述粘合剂复合体包括基材、根据本发明的分散体和片状结构。所述基材和片状结构可以由相同或不同的材料制成。
根据本发明的分散体的特点在于对各种各样的基材和片状结构的优异粘合性,例如,木材,纸,皮革,纺织品,软木,塑料如各种等级的聚氯乙烯,聚氨酯,聚乙酸乙烯酯,橡胶,聚乙烯乙酸乙烯酯(polyethylvinyl acetate),玻璃纤维,玻璃纤维、碳纤维和矿物纤维的机织织物和针织织物,以及矿物材料(mineralmaterials)如石头、混凝土、石膏(gypsum)或熟石膏(plaster)。
包含根据本发明的分散体的粘合剂组合物因此适合于粘结任何所期望的基材和片状结构(优选由上述材料制成)。
根据本发明的粘合剂特别适合于粘结由木材制成的基材和片状结构。
它们也适合于将基于聚氯乙烯(尤其增塑聚氯乙烯)或基于聚乙烯乙酸乙烯酯或聚氨酯弹性体泡沫体的鞋底粘结到由皮革或合成皮革制成的鞋轴(shoe shafts)上,和将基于聚氯乙烯或增塑聚氯乙烯的膜粘结到木材上。
包含根据本发明的分散体的粘合剂组合物也适合于将玻璃纤维、碳纤维或矿物纤维的机织复合材料和针织织物粘结到矿物基材例如石头、混凝土、石膏或熟石膏上。因此可以例如更好地保护建筑物或结构免受机械影响或振动(例如地震)的破坏。这一用途是特别优选的。
本申请同样提供包括利用本发明的分散体粘结的基材和片状结构的粘合剂复合体。
关于水性分散体粘合剂的处理,根据本发明的粘合剂通过粘合剂技术中已知的方法进行处理。
上述的全部参考文献对于所有有用目的将其全部并入本文作为参考。
尽管已经说明并描述了体现本发明的某些特定结构,但是对于本领域的技术人员来说显而易见的是不脱离本发明基本理念的精神和范围可以对各个部分进行各种改进和调整,并且本发明不局限于这里说明和描述的特定形式。
实施例
下面通过实施例来详细解释本发明。在实施湿粘结方法和热活化方法之后剥离强度可以通过以下方法测定:
A)在实施湿粘结方法之后剥离强度的测定
测定以单组分形式(没有交联剂)实施。
试验材料/试样
山毛榉木(刨平)/山毛榉木(刨平),尺寸:40×20×5mm
粘结和测量
利用刷子将粘合剂分散体施加到两个山毛榉木试样上。粘结面积是10×20mm。然后将两个试样的一个放在另一个上面并在室温和5巴压力下接合72小时。
然后在室温下相对于接合处(joint)呈180°角度向试样施加负荷,将试样以100mm/分钟的速率拉开。测量因此所需要的力(=剥离强度,拉伸剪切强度)。测定五次并给出平均值。
B)在实施热活化方法之后剥离强度的测定
1K粘结:不含交联剂的粘合剂
试验材料/试样
a)山毛榉木(刨平)
尺寸:30×210×4.0mm
b)硬质PVC层压膜(Benelit RTF;Benecke-Kaliko AG,Hanover/D)
尺寸:30×210×0.4mm
粘结和测量
利用刷子将粘合剂分散体施加到山毛榉木试样上。粘结面积是30×90mm。在室温下干燥30分钟之后,将第二粘合剂层施加到第一粘合剂层之上,然后使试样在室温下干燥60分钟。然后,将两个试样中的一个放在另一个上面并在100℃和4巴压力下接合10秒。
试样在室温下贮存3天之后,将PVC膜以相对于接合处呈180°角度以30mm/分钟的速率剥离,测量因此所需要的力(=剥离强度)。测定两次并给出平均值。
C)玻璃化转变温度使用来自Perkin-Elmer的Pyris Diamond DSC量热计,通过差示扫描量热法(DSC)测定。为此,以以下方式在玻璃板上制备膜:利用刮涂刀以100μm的湿膜厚度施加分散体,玻璃板在室温和0%环境湿度下在干燥箱中贮存3天。然后在下列测量条件下使用10mg样品材料记录DSC曲线:快速冷却至-100℃的起始温度,然后以20K/分钟的加热速率和320K/分钟的冷却速率启动从-100℃至+150℃的三次加热操作,在氦气氛围中并采用液氮冷却。玻璃化转变温度对应于玻璃化转变半高处的温度。
所使用的材料
分散体I:VP KA8481(Bayer Material Science AG,Leverkusen/D)基于己二酸/丁二醇聚酯以及六亚甲基二异氰酸酯(HDI)和异佛尔酮二异氰酸酯(IPDI)的混合物的经磺酸盐稳定的(sulfonate-stabilised)聚氨酯分散体(分散体的固含量为约40%)。所得聚合物在干燥之后是半结晶的,在-52.5℃的玻璃化转变温度Tg具有玻璃化转变。
分散体II:
Figure A200910126753D00131
U42(Bayer Material Science AG,Leverkusen/D)基于邻苯二甲酸酐/己二醇聚酯、己二醇和六亚甲基二异氰酸酯的经磺酸盐稳定的聚氨酯分散体(分散体的固含量为约50%)。所得聚合物在干燥之后是无定形的,在-3.5℃的玻璃化转变温度Tg具有玻璃化转变。
实施例1(根据本发明)
在搅拌下向600g的VP KA8481分散体缓慢添加400g的
Figure A200910126753D00132
U42分散体,进行搅拌直至形成均匀混合物。然后通过使用热活化方法和湿粘结方法来制备相应的试样,测定剥离强度(描述见上)。
实施例2(对比)
使用VP KA 8481,利用热活化方法和湿粘结方法制备相应的试样,测定剥离强度(描述见上)。
实施例3(对比)
使用
Figure A200910126753D00141
 U 42,利用热活化方法和湿粘结方法制备相应的试样,测定剥离强度(描述见上)。
表1
Figure A200910126753D00142

Claims (10)

1.一种水性分散体,包括以下物质的混合物:
A)水性聚氨酯或聚氨酯-脲分散体,包含:
II.聚合物A),由以下组成:
I(i)具有400-5000g/mol的分子量的至少一种二官能脂肪族聚酯多元醇;
I(ii)六亚甲基二异氰酸酯(HDI)和1-异氰酸根合-3,3,5-三甲基-5-异氰酸根合甲基-环己烷(IPDI)的至少一种混合物;和
I(iii)两种或更多种胺类扩链剂的至少一种混合物,其中至少一种胺类扩链剂具有离子基团;
其中所述聚合物A)在干燥之后是半结晶的或结晶的并且在-65℃至-40℃的玻璃化转变温度Tg具有玻璃化转变;
B)不同于A)的水性聚氨酯或聚氨酯-脲分散体,包含:
II.聚合物B),由以下组成:
II(i)具有400-5000g/mol的分子量的至少一种二官能芳香族聚酯多元醇;
II(ii)具有62-399的分子量的至少一种二官能多元醇;
II(iii)至少一种脂肪族二异氰酸酯;和
II(iv)具有离子基团的至少一种胺类扩链剂;
其中所述聚合物B)在干燥之后是无定形的并且在-15℃至+10℃的玻璃化转变温度Tg具有玻璃化转变。
2.权利要求1的水性分散体,其中基于A)和B)的总重量,A)以30-90wt%的量存在和B)以10-70wt%的量存在。
3.权利要求1的水性分散体,其中HDI与IPDI的摩尔比在9:1-1:9的范围内。
4.权利要求1的水性分散体,其中I(iii)是1,2-乙二胺和N-(2-氨基乙基)-2-氨基乙烷磺酸钠盐的混合物。
5.权利要求4的水性分散体,其中在所述混合物中1,2-乙二胺和N-(2-氨基乙基)-2-氨基乙烷磺酸钠盐的摩尔比在6:1至1:6的范围内。
6.权利要求1的水性分散体,其中II(i)是基于邻苯二甲酸和/或邻苯二甲酸酐与1,4-丁二醇和/或1,6-己二醇的聚酯多元醇。
7.制备权利要求1的水性分散体的方法,包括将A)和B)相互混合。
8.粘合剂组合物,其包含权利要求1的水性分散体。
9.双组分粘合剂组合物,包括权利要求1的水性分散体和每个分子具有至少两个异氰酸酯基团的至少一种多异氰酸酯化合物。
10.粘合剂复合体,其包括用权利要求1的水性分散体粘结的基材和/或片状结构。
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