CN116057137A - 水性可固化粘合剂组合物和其层压制品 - Google Patents
水性可固化粘合剂组合物和其层压制品 Download PDFInfo
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- CN116057137A CN116057137A CN202080103686.0A CN202080103686A CN116057137A CN 116057137 A CN116057137 A CN 116057137A CN 202080103686 A CN202080103686 A CN 202080103686A CN 116057137 A CN116057137 A CN 116057137A
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- acid
- weight
- ethylenically unsaturated
- acrylate
- monomer
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- 239000000203 mixture Substances 0.000 title claims abstract description 110
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- 150000001875 compounds Chemical class 0.000 claims abstract description 25
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- 239000002253 acid Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 8
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 8
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- COCLLEMEIJQBAG-UHFFFAOYSA-N 8-methylnonyl 2-methylprop-2-enoate Chemical compound CC(C)CCCCCCCOC(=O)C(C)=C COCLLEMEIJQBAG-UHFFFAOYSA-N 0.000 claims description 2
- LVGFPWDANALGOY-UHFFFAOYSA-N 8-methylnonyl prop-2-enoate Chemical compound CC(C)CCCCCCCOC(=O)C=C LVGFPWDANALGOY-UHFFFAOYSA-N 0.000 claims description 2
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- MEGHWIAOTJPCHQ-UHFFFAOYSA-N ethenyl butanoate Chemical class CCCC(=O)OC=C MEGHWIAOTJPCHQ-UHFFFAOYSA-N 0.000 claims description 2
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 claims description 2
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 2
- NKHAVTQWNUWKEO-NSCUHMNNSA-N monomethyl fumarate Chemical compound COC(=O)\C=C\C(O)=O NKHAVTQWNUWKEO-NSCUHMNNSA-N 0.000 claims description 2
- 229940005650 monomethyl fumarate Drugs 0.000 claims description 2
- LKEDKQWWISEKSW-UHFFFAOYSA-N nonyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCOC(=O)C(C)=C LKEDKQWWISEKSW-UHFFFAOYSA-N 0.000 claims description 2
- MDYPDLBFDATSCF-UHFFFAOYSA-N nonyl prop-2-enoate Chemical compound CCCCCCCCCOC(=O)C=C MDYPDLBFDATSCF-UHFFFAOYSA-N 0.000 claims description 2
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- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims description 2
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- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 4
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Abstract
一种水性可固化粘合剂组合物,该水性可固化粘合剂组合物包含水性聚合物分散体和具有至少两个氨基基团的多胺化合物。一种层压制品,该层压制品包括至少两个基材和该水性可固化粘合剂组合物。
Description
技术领域
本公开涉及一种水性可固化粘合剂组合物,具体地用于层压应用的水性可固化粘合剂组合物;并且还涉及一种包括至少两个基材和水性可固化粘合剂组合物的层压制品。
背景技术
将柔性包装层压粘合剂施涂在层压膜(两层或多层)之间以包装食品、药物和工业耗材。基于粘合剂组合物,层压粘合剂可以分为三类:溶剂基(SB)、无溶剂(SL)和水基(WB)。其中,WB丙烯酸类粘合剂由于其诸如容易处理、环境友好等益处而最流行。随着应用的扩展,对性能,特别是膜之间的粘结强度的要求大大增加。因此,本领域强烈需要设计具有所需性能(诸如粘结强度)的新型粘结剂或调配物。
发明内容
本公开提供了一种新型水性可固化粘合剂组合物,该水性可固化粘合剂组合物具有所需性能,诸如粘结强度。
在第一方面,本公开提供了一种水性可固化粘合剂组合物,该水性可固化粘合剂组合物包含:
A)水性聚合物分散体,其中该聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于该单体混合物的总重量;和
B)具有至少两个氨基基团的多胺化合物;
其中基于A)该水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
在第二方面,本公开提供了一种层压制品,该层压制品包括至少两个基材和水性可固化粘合剂组合物,该水性可固化粘合剂组合物包含:
A)水性聚合物分散体,其中该聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于该单体混合物的总重量;和
B)具有至少两个氨基基团的多胺化合物;
其中基于A)该水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
在第三方面,本公开提供了一种用于制备水性可固化粘合剂组合物的方法,该方法包括:
将B)具有至少两个氨基基团的多胺化合物与A)水性聚合物分散体共混,其中该聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于该单体混合物的总重量;并且
其中基于A)该水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
在第四方面,本公开提供了一种用于提高包含A)水性聚合物分散体的水性可固化粘合剂组合物的粘结强度的方法,该方法包括:
将B)具有至少两个氨基基团的多胺化合物添加到A)该水性聚合物分散体中,其中该聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于该单体混合物的总重量;并且
其中基于A)该水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
应当理解,前面的一般性描述和以下的详细描述均仅为示例性和解释性的,而非对如所要求保护的本发明的限制。
具体实施方式
除非另外定义,否则本文所用的所有技术和科学术语具有与本发明所属领域中的普通技术人员通常所理解相同的含义。此外,本文所提及的所有公开案、专利申请、专利以及其他参考文献均以引用的方式并入。
如本文所公开,术语“组合物”、“调配物”或“混合物”是指不同组分的物理共混物,其是通过用物理方式简单地混合不同组分来获得。
如本文所公开,术语“玻璃化转变温度”(Tg)可以通过各种技术测量,包括例如差示扫描量热法(“DSC”)或通过使用Fox方程进行的计算。
在整个本文档中,本公开中的“丙烯酸”包括(甲基)丙烯酸、(甲基)丙烯酸酯、(甲基)丙烯酰胺、(甲基)丙烯腈和它们的改性形式,诸如(甲基)丙烯酸羟烷基酯。单词片段“(甲基)丙烯酰基”是指“甲基丙烯酰基”和“丙烯酰基”两者。例如,(甲基)丙烯酸是指甲基丙烯酸和丙烯酸两者,(甲基)丙烯酸甲酯是指甲基丙烯酸甲酯和丙烯酸甲酯两者,并且(甲基)丙烯酰胺是指甲基丙烯酰胺和丙烯酰胺两者。
本文中的“水性”组合物或分散体意指分散在水性介质中的颗粒。本文中的“水性介质”意指水和按介质重量计0重量%至30重量%的一种或多种水混溶性化合物,如例如,醇、二醇、二醇醚、二醇酯等。
“它们的混合物(mixtures thereof或amixturethereof)”是指两种或更多种所列物质或材料的混合物。
本公开的水性可固化粘合剂组合物包含A)水性聚合物分散体,其中水性聚合物分散体中的聚合物被称为聚合物a),该聚合物a)可以是由单体混合物聚合的。
可用于本公开的用于制备聚合物a)的单体混合物可以包含一种或多种烯键式不饱和非离子单体。本文中的“非离子单体”是指在pH=1-14之间不带有离子电荷的单体。合适的烯键式不饱和非离子单体的示例包括(甲基)丙烯酸酯单体,优选地(甲基)丙烯酸烷基酯,更优选地(甲基)丙烯酸C1-18烷基酯或(甲基)丙烯酸C1-12烷基酯或(甲基)丙烯酸C1-6烷基酯,诸如丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯、丙烯酸2-乙基己酯、丙烯酸壬酯、丙烯酸癸酯、丙烯酸异癸酯、丙烯酸月桂酯、甲基丙烯酸甲酯、甲基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯酸壬酯、甲基丙烯酸癸酯、甲基丙烯酸异癸酯、甲基丙烯酸月桂酯或它们的混合物;(甲基)丙烯酸羟烷基酯,更优选地(甲基)丙烯酸C2-18羟烷基酯或(甲基)丙烯酸C2-12羟烷基酯或(甲基)丙烯酸C2-6羟烷基酯,诸如丙烯酸羟乙酯、丙烯酸羟丙酯、甲基丙烯酸羟乙酯、甲基丙烯酸羟丙酯或它们的混合物;(甲基)丙烯酰胺和(甲基)丙烯腈或它们的混合物。可以进一步加入其他合适的非离子单体,例如苯乙烯和经取代的苯乙烯,或其他乙烯基单体,诸如乙酸乙烯酯、丁酸乙烯酯、叔碳酸乙烯酯和其他乙烯基酯、氯乙烯、偏二氯乙烯或它们的混合物。
在一些优选的实施方案中,基于单体混合物的重量,烯键式不饱和非离子单体包含30重量%或更多、35重量%或更多、40重量%或更多、45重量%或更多、50重量%或更多或甚至55重量%或更多的(甲基)丙烯酸酯单体,以及同时,90重量%或更少、80重量%或更少或甚至70重量%或更少、65重量%或更少或甚至60重量%或更少的(甲基)丙烯酸酯单体。在一些优选的实施方案中,基于单体混合物的重量,烯键式不饱和非离子单体包含20重量%或更多、25重量%或更多、30重量%或更多、35重量%或更多或甚至36重量%或更多的苯乙烯和经取代的苯乙烯单体,以及同时,80重量%或更少、70重量%或更少或甚至60重量%或更少、55重量%或更少、50重量%或更少、45重量%或更少或甚至40重量%或更少的苯乙烯和经取代的苯乙烯单体。
在一些优选的实施方案中,烯键式不饱和非离子单体包含基于单体混合物的重量,30重量%或更多、35重量%或更多、40重量%或更多、45重量%或更多、50重量%或更多或甚至55重量%或更多的(甲基)丙烯酸酯单体,以及同时,90重量%或更少、80重量%或更少或甚至70重量%或更少、65重量%或更少或甚至60重量%或更少的(甲基)丙烯酸酯单体;并且包含基于单体混合物的重量,20重量%或更多、25重量%或更多、30重量%或更多、35重量%或更多或甚至36重量%或更多的苯乙烯和经取代的苯乙烯单体,以及同时,80重量%或更少、70重量%或更少或甚至60重量%或更少、55重量%或更少、50重量%或更少、45重量%或更少或甚至40重量%或更少的苯乙烯和经取代的苯乙烯单体。优选地,A)水性聚合物分散体是丙烯酸聚合物分散体,更优选地是RobondTM L-168D。
可用于本公开的单体混合物可以包含基于单体混合物的重量,90重量%或更多、93重量%或更多或甚至96重量%或更多的烯键式不饱和非离子单体,以及同时,99.9重量%或更少、99.5重量%或更少、99重量%或更少或甚至98重量%或更少的烯键式不饱和非离子单体。
合适的烯键式不饱和酸单体的示例包括丙烯酸、甲基丙烯酸、衣康酸、含磷的酸单体,如磷酸二氢酯单体,包括(甲基)丙烯酸2-磷酸乙酯、乙烯基膦酸和烯丙基膦酸;富马酸;马来酸;衣康酸单甲酯;富马酸单甲酯;富马酸单丁酯;马来酸酐;2-丙烯酰胺基-2-甲基-1-丙磺酸;2-丙烯酰胺基-2-甲基-1-丙磺酸的钠盐;2-丙烯酰胺基-2-甲基-1-丙磺酸的铵盐;乙烯基磺酸钠;烯丙醚磺酸的钠盐;和它们的混合物。在一些优选的实施方案中,丙烯酸、甲基丙烯酸、衣康酸、甲基丙烯酸2-磷酸乙酯或它们的混合物用作烯键式不饱和酸单体。在一些优选的实施方案中,丙烯酸、甲基丙烯酸或它们的混合物用作烯键式不饱和酸单体。
可用于本公开的单体混合物可以包含基于单体混合物的重量,0.1重量%或更多、0.5重量%或更多、1重量%或更多、1.5重量%或更多、1.8重量%或更多或2重量%或更多的烯键式不饱和酸单体,以及同时,10重量%或更少、8重量%或更少或甚至6重量%或更少、5重量%或更少、4重量%或更少或3重量%或更少或2.5重量%或更少的烯键式不饱和酸单体。
本公开的水性可固化粘合剂组合物基本上不含多官能羧酸酰肼。合适的多官能羧酸酰肼的示例包括己二酸二酰肼、癸二酸二酰肼、聚酰肼、丙二胺、环己二胺或它们的混合物。
本公开的水性可固化粘合剂组合物基本上不含环氧树脂。
“基本上不含物质”是指当该物质存在时,基于水性可固化粘合剂组合物的总重量,该物质的浓度可以为0.2重量%或更小、0.1重量%或更小或0.05重量%或更小、或甚至0.01重量%或更小。
在一个优选的实施方案中,水性聚合物分散体A)或聚合物a)通过乳液聚合制备,并且因此是乳液聚合物。
在乳液聚合的情况下,使用合适的表面活性剂体系和/或保护性胶体,或稳定剂。
合适的表面活性剂体系的示例是本领域已知的那些并且包括阴离子、非离子、阳离子或两性乳化剂及其混合物。阴离子表面活性剂的示例包括但不限于烷基硫酸盐、乙氧基化醇的硫酸盐、芳基磺酸盐、乙氧基化醇的磷酸盐、磺基琥珀酸盐、乙氧基化烷基酚的硫酸盐和磺酸盐,以及它们的混合物。非离子表面活性剂的示例包括但不限于乙氧基化醇、乙氧基化烷基酚及它们的混合物。阳离子表面活性剂的示例包括但不限于乙氧基化脂肪胺。基于单体的总重量计,表面活性剂的典型重量为0.1重量%至5.0重量%,并且更优选0.3重量%至5.0重量%,并且最优选0.5重量%至3.0重量%。表面活性剂通过本领域公知的常规方法使用。在一个实施方案中,制备组合物的方法包括在聚合反应之前将单体混合物用表面活性剂体系乳化。
用于乳液聚合的水溶性引发剂是例如过氧二硫酸的铵盐和碱金属盐,例如过氧二硫酸钠、过硫酸铵、过氧化氢,或有机过氧化物,例如叔丁基过氧化氢。
已知的还原-氧化(氧化还原)引发剂体系也是合适的。
氧化还原引发剂体系由至少一种(通常是无机的)还原剂和一种有机或无机氧化剂组成。
氧化组分包括例如上文已提及的乳液聚合引发剂。
还原组分包括例如亚硫酸的碱金属盐,诸如亚硫酸钠、亚硫酸氢钠;二亚硫酸的碱金属盐,诸如二亚硫酸钠;亚硫酸氢盐与脂族醛和酮的加成化合物,诸如丙酮亚硫酸氢盐;或还原剂,诸如羟基甲亚磺酸及其盐,或抗坏血酸。氧化还原引发剂体系可与可溶性金属化合物一起使用,所述可溶性金属化合物的金属组分能够以多种价态存在。
常规氧化还原引发剂体系的示例包括抗坏血酸/硫酸铁(II)/过氧二硫酸钠、叔丁基过氧化氢/二亚硫酸钠和叔丁基过氧化氢/羟基甲亚磺酸钠。单独的组分,例如还原组分,也可以是混合物:例如羟基甲亚磺酸钠盐与二亚硫酸钠的混合物。
这些化合物大多以水溶液的形式使用,较低的浓度取决于分散体中可接受的水量,而较高的浓度取决于相应化合物在水中的溶解度。基于溶液,浓度通常为0.1重量%至30重量%,优选0.5重量%至20重量%,特别优选1.0重量%至10重量%。
基于待聚合的单体,引发剂的量通常为0.1重量%至10重量%,优选0.3重量%至5重量%。两种或更多种不同的引发剂也可用于乳液聚合。
乳液聚合通常在30℃至130℃,优选60℃至95℃下进行。聚合介质可以由单独的水或由水与水混溶性液体诸如甲醇的混合物组成。优选地,仅使用水。乳液聚合可以作为间歇操作或以进料方法的形式进行,包括分段或梯度程序。优选进料方法,其中将聚合混合物的一部分作为初始进料引入并加热至聚合温度,开始该初始进料的聚合,然后将聚合混合物的剩余部分通常通过两个或多个空间分离的进料流供应至聚合区,所述进料流中的一个或多个包含直链或乳化形式的单体,该添加是连续、分阶段或在浓度梯度下进行的,并且在所述添加过程中保持聚合。为了例如更有效地设定粒度,还可以在聚合的初始进料中包括聚合物晶种。
在自由基水乳液聚合过程中将引发剂添加到聚合容器中的方式是技术人员已知的。其可以全部包含在聚合容器的初始进料中,或者以其在自由基水乳液聚合过程中消耗的速率连续或分阶段引入。在每种特定情况下,这将取决于引发剂体系的化学性质和聚合温度。优选在初始进料中包括一部分,并将剩余部分以其消耗的速率供应至聚合区。
为了去除残留单体,通常也在实际乳液聚合结束后,即在单体转化率为至少95%之后添加引发剂。
在进料过程中,可以从顶部、通过侧面或从底部通过反应器底板将单独的组分添加到反应器中。
在乳液聚合的情况下,获得具有通常为15重量%至80重量%,优选地30重量%至70重量%,更优选地40重量%至65重量%,仍更优选地40重量%至55重量%的固体含量的水性聚合物分散体。
可以选择上述单体的类型和含量,以提供具有适合于层压应用的Tg的聚合物a)。
聚合物a)的玻璃化转变温度可以在-60℃至30℃、-50℃至20℃、或-40℃至10℃;或者特别优选地-50℃至10℃,以及非常特别优选地-45℃至5℃的范围内。
玻璃化转变温度可以通过常规方法测定,诸如差示热分析或差示扫描量热法(参见,例如,ASTM 3418/82,中点温度)。
基于水性粘合剂组合物的总重量,本公开的粘合剂组合物中的水性聚合物分散体按固体重量计可以以15%或更多、20%或更多、25%或更多、35%或更多或甚至40%或更多,以及同时,80%或更少、75%或更少、70%或更少、65%或更少、60%或更少、55%或更少、或甚至45%或更少的量存在。
由此制备的聚合物优选以其水分散体的形式使用。
聚合物分散体的pH优选地调节至大于4.5的pH,以及具体地介于5与10之间的pH。
本公开的水性粘合剂组合物还包含B)具有至少两个氨基基团的多胺化合物。
B)具有至少两个氨基官能团的多胺化合物的具体示例包括但不限于包含至少两个胺基团的C2-C16脂族多胺,例如乙二胺、六亚甲基二胺;包含至少两个氨基基团的C4-C15脂环族或芳香族多胺,诸如环己二胺和对二甲苯二胺;包含至少两个氨基基团的C7-C15芳脂族多胺;和它们的混合物。根据优选的实施方案,B)具有至少两个氨基官能团的多胺化合物是乙二胺、六亚甲基二胺或它们的混合物。在另一个实施方案中,具有至少两个氨基官能团的多胺化合物是乙二胺或六亚甲基二胺。
多胺化合物B)可以在乳液反应后添加。
多胺化合物B)的含量为基于A)水性聚合物分散体的固体重量,0.5wt%至10wt%;或基于A)水性聚合物分散体的固体重量,0.6wt%至9.5wt%;具体地基于A)水性聚合物分散体的固体重量,0.68wt%至9wt%;和或基于A)水性聚合物分散体的固体重量,1wt%至8wt%;或基于A)水性聚合物分散体的固体重量,1.1wt%至7wt%;或基于A)水性聚合物分散体的固体重量,1.5wt%至5wt%;或基于A)水性聚合物分散体的固体重量,2wt%至4wt%。多胺化合物B)的含量可以在通过组合基于A)水性聚合物分散体的固体重量,以下端点值0.5wt%、0.6wt%、0.7wt%、0.8wt%、0.9wt%、1wt%、1.5wt%、2wt%、2.5wt%、3wt%、3.5wt%、4wt%、4.5wt%、5wt%、5.5wt%、6wt%、6.5wt%、7wt%、7.5wt%、8wt%、8.5wt%、9wt%、9.5wt%和10wt%中的任两个而获得的数值范围内。
聚合物a)或水性聚合物分散体A)可以以简单的方式与化合物B)混合。所得混合物储存稳定。
水性可固化粘合剂组合物可以包含另外的添加剂:增稠剂、消泡剂、润湿剂、机械稳定剂、颜料、填料、冻融剂、中和剂、增塑剂、增粘剂(增粘树脂)、粘合促进剂,以及它们的组合。
增粘剂的示例是天然树脂,诸如松香及其通过歧化或异构化、聚合、二聚和/或氢化形成的衍生物。它们可以以其盐的形式(具有例如单价或多价抗衡离子(阳离子))或优选以其酯化的形式存在。
还使用烃树脂,例如非氢化脂族C5树脂、氢化脂族C5树脂、芳族改性C5树脂、萜烯树脂、氢化C9树脂及它们的组合。
越来越多地用作增粘剂的其他化合物包括具有低摩尔重量的聚丙烯酸酯。这些聚丙烯酸酯优选具有小于30,000的重均分子量MW。优选地,聚丙烯酸酯由至少60重量%,特别是至少80重量%的(甲基)丙烯酸C1-C8烷基酯组成。
优选的增粘剂是天然或化学改性的松香。松香主要由枞酸或其衍生物组成。
根据100重量份的聚合物(固体/固体、),增粘剂以重量计的量优选为5至100重量份,特别优选10至50重量份。
基于粘合剂组合物的总重量,水性可固化粘合剂组合物可以包含0重量%至5重量%的增稠剂。本文包括并公开0重量%至5重量%的所有个别值和子范围。例如,增稠剂的wt%可以为0重量%、0.5重量%或1重量%的下限至1重量%、3重量%或5重量%的上限。示例性增稠剂包括但不限于ACRYSOLTM、UCARTM和CELOSIZETM,它们可从密歇根州米德兰的陶氏化学公司(The Dow Chemical Company,Midland,Michigan)商购获得。
基于粘合剂组合物的总重量,水性可固化粘合剂组合物可以包含0重量%至2重量%的中和剂。
本文包括并公开0重量%至2重量%的所有个别值和子范围。例如,中和剂的重量%可以是0、0.3重量%或0.5重量%的下限到0.5重量%、1重量%或2重量%的上限。中和剂通常用于控制pH以向调配的粘合剂组合物提供稳定性。中和剂的示例包括但不限于氨水、水性胺和其他水性无机盐。
水性可固化粘合剂组合物可以用于层压应用。
本公开还提供了一种包括至少两个基材和本文所公开的水性可固化粘合剂组合物的层压制品。优选地,将水性可固化粘合剂组合物的层施涂到这些基材中的至少一个基材的一侧或两侧上,优选地施涂到一侧上。
为了在基材上产生粘合剂层,可以常规地对基材进行涂覆。常规施涂率为例如1g/m2至50g/m2(固体,无水)。
两个基材可以相同或不同。
基材可以包括例如纸;金属箔;优选地由聚烯烃(包括聚乙烯和聚丙烯)制成的聚合物膜,这些聚合物膜可以是双轴向取向或单轴向取向的,诸如双轴向取向的聚丙烯膜(Bopp膜)或浇铸聚丙烯膜(CPP膜);聚对苯二甲酸乙二醇酯(PET);聚氯乙烯(PVC);聚苯乙烯;或聚酰胺。在优选的实施方案中,基材可以包括双轴向取向的聚丙烯膜(Bopp膜)或浇铸聚丙烯膜(CPP膜)。
本公开的层压制品具有良好的性能,具体地提高的粘结强度。
层压制品可以用于包装,诸如食品包装。
实施例
现在将在以下实施例中描述本公开的一些实施方案,其中所有的份数和百分比都是以重量计,除非另有说明。
原材料:
所用缩写:DI水=去离子水;SC=按重量计的固体含量;
A:丙烯酸聚合物水性分散体(来自陶氏化学公司(DOW Chemical)的即用型商品):
1.配方
将上述原材料在适当搅拌下调配15分钟以获得根据表2中所列的配方的可固化水性组合物。
表2:样品的配方。
2.层压结构的制备和粘结强度的测试
通过以下程序制备层压结构:
1)将粘合剂调配物分别直接涂覆在BOPP膜(可从温州金田集团(Wenzhou GettelGroup)获得)上;
2)选择右绕线棒(型号:0,可从英国的RK打印公司(RK Print,U.K.)获得)以将粘合剂的干涂层重量控制在约2gsm;
3)将粘合剂在80℃下干燥2分钟;
4)将步骤3)中获得的产品与CPP膜(可从温州金田集团获得)层压,并且夹持温度(nip temperature)为80℃;
5)将层压物在室温下调理3天,之后测量粘结强度。
在Instron(可从美国的英斯特朗公司(Instron,U.S.)获得)上在以下条件下测试层压的粘结强度:
样品宽度:15mm
剥离速率:250毫米/分钟(T-剥离)
单位:N/15mm
结果在表3中列出。
表3:BOPP/CPP结构上的调配物的粘结强度
通过比较发明调配物(发明1至发明5)和比较调配物比较例1(空白)的结果,可以看出,多胺的添加可以将层压结构的粘结强度提高>50%,并且最终粘结强度可以接近于商业对照样品。如果多胺的添加水平低(比较例2和比较例3),则提高将减弱。
Claims (12)
1.一种水性可固化粘合剂组合物,所述水性可固化粘合剂组合物包含:
A)水性聚合物分散体,其中所述聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于所述单体混合物的总重量;和
B)具有至少两个氨基基团的多胺化合物;
其中基于A)所述水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
2.根据权利要求1所述的组合物,其中所述烯键式不饱和非离子单体选自(甲基)丙烯酸酯单体、(甲基)丙烯酰胺、(甲基)丙烯腈、苯乙烯、经取代的苯乙烯、其他乙烯基单体和它们中的两种或更多种的混合物。
3.根据权利要求1所述的组合物,其中所述烯键式不饱和非离子单体选自丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯、丙烯酸2-乙基己酯、丙烯酸壬酯、丙烯酸癸酯、丙烯酸异癸酯、丙烯酸月桂酯、甲基丙烯酸甲酯、甲基丙烯酸乙酯、甲基丙烯酸丁酯、甲基丙烯酸壬酯、甲基丙烯酸癸酯、甲基丙烯酸异癸酯、甲基丙烯酸月桂酯、丙烯酸羟乙酯、丙烯酸羟丙酯、甲基丙烯酸羟乙酯、甲基丙烯酸羟丙酯、(甲基)丙烯酰胺、(甲基)丙烯腈、苯乙烯、经取代的苯乙烯、乙酸乙烯酯、丁酸乙烯酯、叔碳酸乙烯酯、氯乙烯、偏二氯乙烯和它们中的两种或更多种的混合物。
4.根据权利要求1所述的组合物,其中所述烯键式不饱和酸单体选自丙烯酸、甲基丙烯酸、衣康酸、含磷的酸单体;富马酸;马来酸;衣康酸单甲酯;富马酸单甲酯;富马酸单丁酯;马来酸酐;2-丙烯酰胺基-2-甲基-1-丙磺酸;2-丙烯酰胺基-2-甲基-1-丙磺酸的钠盐;2-丙烯酰胺基-2-甲基-1-丙磺酸的铵盐;乙烯基磺酸钠;烯丙醚磺酸的钠盐;和它们的混合物。
5.根据权利要求1所述的组合物,其中所述烯键式不饱和酸单体选自丙烯酸、甲基丙烯酸和它们的混合物。
6.根据权利要求1所述的组合物,其中所述聚合物的玻璃化转变温度在-60℃至30℃的范围内。
7.根据权利要求1所述的组合物,其中所述具有至少两个氨基基团的多胺化合物选自包含至少两个胺基团的C2-C16脂族多胺、包含至少两个氨基基团的C4-C15脂环族或芳香族多胺、包含至少两个氨基基团的C7-C15芳脂族多胺;和它们的混合物。
8.根据权利要求1所述的组合物,其中所述具有至少两个氨基基团的多胺化合物选自乙二胺、六亚甲基二胺或它们的混合物。
9.根据权利要求1所述的组合物,其中基于A)所述水性聚合物分散体的固体重量,多胺化合物B)的含量为0.6wt%至9.5wt%。
10.一种层压制品,所述层压制品包括至少两个基材和水性可固化粘合剂组合物,所述水性可固化粘合剂组合物包含:
A)水性聚合物分散体,其中所述聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于所述单体混合物的总重量;和
B)具有至少两个氨基基团的多胺化合物;
其中基于A)所述水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
11.一种用于制备水性可固化粘合剂组合物的方法,所述方法包括:
将B)具有至少两个氨基基团的多胺化合物与A)水性聚合物分散体共混,其中所述聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于所述单体混合物的总重量;并且
其中基于A)所述水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
12.一种用于提高包含A、)水性聚合物分散体的水性可固化粘合剂组合物的粘结强度的方法,所述方法包括:
将B)具有至少两个氨基基团的多胺化合物添加到A)所述水性聚合物分散体中,其中所述聚合物是由包含以下的单体混合物聚合的:
(i)90wt%-99.9wt%的一种或多种烯键式不饱和非离子单体;
(ii)0.1wt%-10wt%的烯键式不饱和酸单体;
其中百分比基于所述单体混合物的总重量;并且
其中基于A)所述水性聚合物分散体的固体重量,组分B)的含量为0.5wt%-10wt%。
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