CN110643286A - Uv固化组合物及包含该组合物的胶膜、胶带和粘结构件 - Google Patents
Uv固化组合物及包含该组合物的胶膜、胶带和粘结构件 Download PDFInfo
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- CN110643286A CN110643286A CN201810678157.8A CN201810678157A CN110643286A CN 110643286 A CN110643286 A CN 110643286A CN 201810678157 A CN201810678157 A CN 201810678157A CN 110643286 A CN110643286 A CN 110643286A
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- YCJYNBLLJHFIIW-MBABXGOBSA-N validoxylamine A Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)C[C@@H]1N[C@@H]1[C@H](O)[C@@H](O)[C@H](O)C(CO)=C1 YCJYNBLLJHFIIW-MBABXGOBSA-N 0.000 description 1
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Abstract
本公开涉及一种UV固化组合物及包含该组合物的胶膜、胶带和粘结构件。所述UV固化组合物为光碱催化的UV固化组合物。所述UV固化组合物包含:(1)丙烯酸类聚合物和/或乙烯‑醋酸乙烯酯共聚物;(2)可固化成分,所述可固化成分含有多官能度硫醇和多官能度环氧树脂;(3)光碱产生剂。本公开的组合物能够涂布为胶带或者胶膜,该胶带或胶膜在未进行UV固化时具有初粘性,在UV固化后能够达到半结构胶或结构胶的强度。
Description
技术领域
本发明属于胶粘剂领域,特别涉及一种UV固化组合物及包含该组合物的胶膜、胶带和粘结构件。
背景技术
UV固化的胶带或胶膜在未固化时具有可模切、能够提供初始强度、不溢胶、外观优良等优点。UV固化胶带的胶膜由压敏胶、可固化成分和光引发剂三部分组成。传统的UV固化胶带可分为UV自由基固化体系和UV阳离子固化体系。对于UV自由基固化的胶带来说,其固化速度太快,不能形成较好的粘结强度,且不能用于不透明表面的粘结。UV阳离子固化的胶带可以用于不透明表面的粘结,固化速度容易调节,但是阳离子很容易受到湿气和碱性物质的影响,导致其固化速度大大降低或者固化不完全,同时阳离子固化过程中产生的酸容易对金属表面造成腐蚀。
作为UV阳离子固化的胶带,例如,美国专利US 6274643B1公开了一种含有热塑性乙烯-醋酸乙烯酯共聚物(EVA)、环氧树脂和阳离子光引发剂的粘合剂配方,该配方具有良好的初粘性,能够通过涂布形成粘合剂胶膜,固化后能够形成大于6.9MPa的搭接剪切强度。美国专利US 6254954B1公开了一种基于聚酯/环氧树脂/多羟基化合物/光引发剂的压敏胶,该胶带能够在化学射线或者电子束作用下固化。不过,UV阳离子固化的胶带体系,容易受到湿气和碱性物质的影响,导致胶膜固化速度大大降低或者固化不完全,且容易对金属基材产生腐蚀。
在学术和工业领域都有一些光碱产生剂的研究。这些光碱产生剂能够在UV光照射下产生一级胺、二级胺、三级胺或者超级碱。例如,发表于Photobase generators:Recentprogress and application trend in polymer systems;Kanji Suyama,MasamitsuShirai等,Progress in Polymer Science,2009,34,194–209.的文献,对光碱产生剂进行了综述性地描述。专利文献WO2003033500A1公开了一种具有光活性的含氮的光碱产生剂,可作为光引发剂催化相关的化合物反应。专利文献WO2015083331A1公开了一类光碱产生剂,比传统的光碱产生剂具有更短的凝胶化时间。这些文献仅对光碱产生剂进行了报道,未提出将其用于胶粘剂应用领域。
光碱产生剂在胶粘剂组合物中的应用,可列举出如下例子。专利文献WO2013151739A1公开了一种可交联组合物,所述可交联组合物包含具有侧光碱官能团的(甲基)丙烯酸酯共聚物组分和具有胺反应性官能团的交联剂。在暴露于光时,所述侧光碱基团光解以提供侧胺基团,所述侧胺基团使所述共聚物交联。专利文献WO2013130238A1提供了一种可离子交联的组合物,其包含具有侧酸官能基团和侧光碱官能基团的(甲基)丙烯酸酯共聚物组分。在暴露于光时,侧光碱基团光解以提供侧胺基团,所述侧胺基团离子交联所述共聚物。专利文献WO2008152956A1提供一种光固化型粘合剂组合物,该组合物在光照射前具有充分的粘合力,在光照射后可以确保充分的可使用时间,且在室温下固化结束的时间短,并且对于粘合较为困难的被粘合体的粘合力高,以及耐久性优异。该光固化型粘合剂组合物含有通过碱的作用而发生交联的交联性化合物(A)、通过照射光而活性化并产生碱的光产碱剂(B)以及粘着性赋予成分(C)。专利文献US20060052475A1描述了一种可在UV引发后进行热交联的聚丙烯酸酯热熔压敏胶,该压敏胶在UV照射下产生碱性基团,该碱性基团和聚合物侧基官能团反应从而实现交联。
上述四篇将光碱产生剂用于胶粘剂组合物的专利文献中,所述的交联组合物在UV照射后,其交联反应都是通过光碱产生剂产生的碱性基团和聚合物中的官能团发生反应实现的,其交联效率低,UV固化后的组合物结构强度低。
专利文献WO2013089100A1公开了一种固化性树脂组合物和固化方法,所述固化性树脂组合物含有(A)分子内具有两个以上缩水甘油基的化合物、(B)分子内具有两个以上硫醇基的化合物和(C)阴离子盐光碱产生剂。还公开了可添加(D)光敏剂和(E)可自由基聚合的化合物,(E)的添加可以调节光照射后的组合物的流动性。所述固化性树脂组合物通过光等活性能量线的照射在低温下能够快速固化,并且储藏稳定性优异。不过,该文献所报道的树脂组合物,在未固化时不具有胶带或胶膜的性质,不具备可模切性,不能够提供初始粘结力,在施工和组装过程中难以对胶粘剂层的厚度进行精确控制,容易产生溢胶现象,带来外观问题,并且可能对基材造成污染。
因此,需要一种能够解决上述问题的UV固化组合物、胶膜和胶带。
发明内容
针对以上问题,发明人进行了深入研究,发现碱催化的UV固化组合物和包含该组合物的胶膜和胶带可以解决上述问题。
本公开提供了一种UV固化组合物,该组合物能够用于制造胶带或者胶膜,该胶带或者胶膜在未进行UV固化时,具有初粘性,能够在UV固化前实现定位功能。在UV固化后,该胶带或者胶膜能够达到半结构胶或结构胶的强度。在UV光激发下胶带和胶膜中的光碱产生剂可以产生碱性催化剂,催化胶带中的可固化成分反应,进而提高胶带的结构强度。在本公开中,在UV照射时,并没有发生固化反应或者仅发生少部分固化反应。UV照射后,通过一段时间的后固化过程,胶带/胶膜完全固化。后固化过程可以在室温进行,升高温度可以加速固化。该UV固化组合物既可用于可透过UV部件的粘结,也可以用于不可透过UV部件的粘结。
所述UV固化组合物包含以下成分:(1)(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述(甲基)丙烯酸类聚合物和乙烯-醋酸乙烯酯共聚物的玻璃化转变温度Tg为-50~47℃;(2)可固化成分,包括多官能度硫醇和多官能度环氧树脂;和(3)光碱产生剂。
本公开的UV固化组合物还可以包含(4)光敏剂。
在本公开的UV固化组合物或胶带(或胶膜)中,相对于每100克的所述(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述组合物含有:包含0.01摩尔~1.1摩尔巯基的多官能度硫醇;包含0.005摩尔~1.05摩尔环氧基的多官能度环氧树脂;和0.5~20克的光碱产生剂。所述多官能度硫醇中的巯基的摩尔量与所述多官能度环氧树脂中的环氧基的摩尔量的比为1:3~3:1,优选为1:2~2:1,更优选为1.2:1~1:1.2。可选地,相对于每100克的所述(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述组合物还含有0.15~10克的光敏剂。
在本公开的UV固化组合物中,所述(甲基)丙烯酸类聚合物优选由至少一种以下单体共聚得到:
(a)非功能性(甲基)丙烯酸类单体;和/或
(b)含有极性官能团的(甲基)丙烯酰类单体;和/或
(c)含有交联性官能团的(甲基)丙烯酰类单体。
非功能性(甲基)丙烯酸类单体是指除了含有(甲基)丙烯酸酯官能团之外,不含有其他官能团的(甲基)丙烯酸类单体,例如为(甲基)丙烯酸烷基酯或(甲基)丙烯酸芳基酯,优选丙烯酸C1-12烷基酯或甲基丙烯酸C1-12烷基酯,更优选C1-8烷基酯。
所述含有极性官能团的(甲基)丙烯酰类单体是指含有一种或多种极性官能团的(甲基)丙烯酰类单体,所述极性官能团可以为选自羟基(OH)、醚基、氨基和酰胺基中的一种或多种官能团,例如羟基(OH)、吗啉基或四氢呋喃基。
所述含有交联性官能团的(甲基)丙烯酰类单体是指含有在单体共聚后能够进一步发生交联反应的交联性官能团的(甲基)丙烯酰类单体,优选含有羧基(COOH)、酸酐基和环氧基中的一种或多种,例如可以是缩水甘油基。
所述(甲基)丙烯酸类聚合物还可以包含来自非(甲基)丙烯酰类单体的烯键式不饱和单体的单元,所述烯键式不饱和单体选自带有极性官能团的单体或带有交联性官能团的单体。
所述(甲基)丙烯酸类聚合物和乙烯-醋酸乙烯酯共聚物的玻璃化转变温度Tg优选为-40~40℃,更优选为-30~30℃,特别优选为-20~20℃,例如-20~0℃。
在所述乙烯-醋酸乙烯酯共聚物中,来自醋酸乙烯酯单体的单元比例可以为60重量%以上,优选80重量%以上,或90重量%以上。来自醋酸乙烯酯单体的单元比例的上限不进行特别限制,只要可以实现本发明的技术效果即可,例如可以为95重量%、96重量%、97重量%或98重量%,共聚物中其余单体为乙烯单体。
本公开还提供了包含上述UV固化组合物的胶膜。本公开的胶膜具有可模切性,在未进行UV固化时初始剥离力不低于0.2N/mm,优选不低于0.3N/mm,UV固化后搭接剪切强度不低于1MPa,优选不低于5MPa,更优选不低于7MPa。
本公开还提供了包含上述胶膜以及可选的基材和离型膜/离型纸的胶带。
本公开还提供了包含使用上述UV固化组合物或者上述胶膜粘结的第一部件和第二部件的粘结构件。在本公开的粘结构件中,在用本公开的组合物或胶膜将第一部件和第二部件初步粘结后,通常使组合物固化以提高粘结强度。当使用胶膜进行粘结时,第一部件和第二部件中的一个可以为基材。
通过组合使用玻璃化转变温度Tg为-50~47℃的(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物、可固化成分和光碱产生剂,可以取得协同作用效果。与不具有上述组成的UV固化组合物、胶膜或胶带相比,本公开的UV固化组合物和包含该组合物的胶膜和胶带在未进行UV固化时具有初粘性,可模切,能够提供初始强度,不溢胶,外观优良。此外,由于在本公开的组合物中光碱产生剂通过产生碱性催化剂催化固化反应进行,其固化不像光酸固化那样容易受到湿气和碱性物质的影响,不会对金属基材表面造成腐蚀,并且其固化效率高,少量的光碱产生剂即能够催化交联反应的进行,达到半结构胶或结构胶的强度。一般来说,半结构胶是指剪切强度在100~1000psi、即0.7~7MPa的胶粘剂;结构胶是指剪切强度大于1000psi、即大于7MPa的胶粘剂。
附图说明
图1显示了实施例E1的胶膜在室温下随着固化时间的搭接剪切强度(OLS)值的变化,其中的横坐标为室温固化时间,时间单位为小时(h),纵坐标为搭接剪切强度,强度单位为兆帕(MPa)。
图2是本公开的不含基材的胶带的示意图。
图3是本公开的单面胶带的示意图。
图4是本公开的包含基材的双面胶带的示意图。
具体实施方式
下面结合实施方式对本公开做进一步的详细说明。但应理解,本公开并不局限于所公开的具体实施方式,其范围由所附权利要求所界定。
UV固化组合物
本公开的UV固化组合物包含以下成分:(1)(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,该(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物的玻璃化转变温度Tg为-50~47℃,优选为-40~40℃,更优选为-30~30℃,特别优选为-20~20℃,例如-20~0℃;(2)可固化成分,包括多官能度硫醇和多官能度环氧树脂;(3)光碱产生剂。
本公开的UV固化组合物还可以包含(4)光敏剂。
(甲基)丙烯酸类聚合物
在本公开的UV固化组合物中,所述(甲基)丙烯酸类聚合物包含至少1种来自(甲基)丙烯酰类单体的单元或由1种以上(甲基)丙烯酰类单体形成,优选包含至少2种或至少3种来自(甲基)丙烯酰类单体的单元,或由2种以上或3种以上(甲基)丙烯酰类单体形成。所述(甲基)丙烯酸类聚合物优选由至少一种以下单体共聚得到:(a)非功能性(甲基)丙烯酸类单体;和/或(b)含有极性官能团的(甲基)丙烯酰类单体;和/或(c)含有交联性官能团的(甲基)丙烯酰类单体。上述三种单体互不包括。
非功能性(甲基)丙烯酸类单体可以为(甲基)丙烯酸烷基酯、(甲基)丙烯酸环烷基酯或(甲基)丙烯酸芳基酯,优选为丙烯酸C1-12烷基酯或甲基丙烯酸C1-12烷基酯,更优选C1-8烷基酯。例如,非功能性(甲基)丙烯酸类单体的实例包括:(甲基)丙烯酸C1-12烷基酯,如(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸丙酯、(甲基)丙烯酸丁酯、(甲基)丙烯酸戊酯、(甲基)丙烯酸己酯、(甲基)丙烯酸庚酯、(甲基)丙烯酸辛酯;(甲基)丙烯酸C3-C8环烷基酯,如(甲基)丙烯酸环丙酯、(甲基)丙烯酸环丁酯、(甲基)丙烯酸环戊酯、(甲基)丙烯酸环己酯;(甲基)丙烯酸C6-C12芳基酯,如(甲基)丙烯酸苯酯、(甲基)丙烯酸萘酯、(甲基)丙烯酸苄酯;以及他们的同分异构体,如(甲基)丙烯酸异丁酯和(甲基)丙烯酸异辛酯等。
(甲基)丙烯酰类单体指的是在分子中含有(甲基)丙烯酰基的单体。
所述含有极性官能团的(甲基)丙烯酰类单体不包括所述非功能性(甲基)丙烯酸类单体和所述含有交联性官能团的(甲基)丙烯酰类单体。作为所述含有极性官能团的(甲基)丙烯酰类单体,优选含有选自羟基、醚基和酰胺基中的一种或多种极性官能团,例如选自羟基、吗啉基和四氢呋喃基等中的一种或多种极性官能团。通过选择不同的极性官能团,可以使得胶膜能够适用于不同的材料,对特殊基材可能有更好的粘合作用,或者带来性能(如耐湿热性等)的改善。
含有极性官能团的(甲基)丙烯酰类单体的实例包括:(甲基)丙烯酸羟基烷基酯类,例如丙烯酸羟基甲基酯、丙烯酸羟基乙基酯、丙烯酸羟基丙基酯、丙烯酸羟基丁基酯、甲基丙烯酸羟基甲基酯、甲基丙烯酸羟基乙基酯、甲基丙烯酸羟基丙基酯、甲基丙烯酸羟基丁基酯等;(甲基)丙烯酰胺类,如丙烯酰胺、甲基丙烯酰胺、N,N-二甲基丙烯酰胺、N-羟甲基丙烯酰胺、N-羟乙基丙烯酰胺、N-(丁氧基甲基)丙烯酰胺、N-叔丁基丙烯酰胺、二丙酮丙烯酰胺、N-[3-(二甲基氨基)丙基]甲基丙烯酰胺、N-(异丁氧基甲基)丙烯酰胺、N-异丙基丙烯酰胺、N-异丙基甲基丙烯酰胺、甲基丙烯酰胺、N-苯基丙烯酰胺、4-丙烯酰吗啉等;(甲基)丙烯酸氨基烷基酯类,如丙烯酸2-(二乙基氨基)乙酯、丙烯酸2-(二甲基氨基)乙基酯、丙烯酸3-(二甲基氨基)丙基酯、甲基丙烯酸2-(二乙基氨基)乙酯、甲基丙烯酸2-(二甲基氨基)乙基酯、甲基丙烯酸3-(二甲基氨基)丙基酯等;含醚基的(甲基)丙烯酸酯类,如(乙二醇)乙基醚丙烯酸酯、二(乙二醇)2-乙基己基醚丙烯酸酯、丙烯酸2-乙氧基乙酯、丙烯酸2-丁氧基乙酯、乙二醇二环戊烯基醚丙烯酸酯、乙二醇甲基醚丙烯酸酯、乙二醇苯基醚丙烯酸酯、二(乙二醇)甲基醚甲基丙烯酸酯、甲基丙烯酸2-乙氧基乙酯、甲基丙烯酸2-丁氧基乙酯、乙二醇二环戊烯基醚甲基丙烯酸酯、乙二醇甲基醚甲基丙烯酸酯、乙二醇苯基醚甲基丙烯酸酯、丙烯酸四氢呋喃基酯、甲基丙烯酸四氢呋喃基酯等。
所述含有交联性官能团的(甲基)丙烯酰类单体不包括所述非功能性(甲基)丙烯酸类单体和所述含有极性官能团的(甲基)丙烯酰类单体。作为含有交联性官能团的(甲基)丙烯酰类单体,其可以含有羧基、酸酐基和环氧基等交联性官能团,其中的环氧基例如可以是缩水甘油基。所述交联性官能团是指在单体共聚后能够进一步发生交联反应的官能团。所述含有交联性官能团的(甲基)丙烯酰类单体还包括含有交联性官能团的前体官能团的(甲基)丙烯酰类单体,所述交联性官能团的前体官能团是指,在单体共聚后,可以转化为交联性官能团的官能团。通过使用具有交联性基团的(甲基)丙烯酰类单体,可以使(甲基)丙烯酸类聚合物在组合物固化时发生交联反应,得到更加致密的胶膜并改善胶膜的性能。
交联性(甲基)丙烯酰类单体的实例包括丙烯酸、甲基丙烯酸、丙烯酸酐、甲基丙烯酸酐、丙烯酸2-羧基乙酯、甲基丙烯酸2-羧基乙酯、丙烯酸缩水甘油酯、甲基丙烯酸缩水甘油酯、3,4-环氧环己基丙烯酸酯、3,4-环氧环己基甲基丙烯酸酯等。
所述(甲基)丙烯酸类聚合物还可以包含来自非(甲基)丙烯酰类单体的烯键式不饱和单体的单元。烯键式不饱和单体可以是带有极性官能团的单体,所述极性官能团可以与上述(甲基)丙烯酰类单体相同。所述烯键式不饱和单体还可以是带有交联性官能团的单体。所述交联性官能团可以与上述(甲基)丙烯酰类单体相同,例如可以选自羧基、酸酐基和环氧基中的一种或多种。例如,烯键式不饱和单体可以是N-乙烯基吡咯烷酮、N-乙烯基己内酰胺、醋酸乙烯酯、苯乙烯、甲基苯乙烯、乙烯基甲苯、丙酸乙烯酯、月桂酸乙烯酯、壬酸乙烯酯、癸酸乙烯酯、月桂酸乙烯酯和硬脂酸乙烯酯、氯乙烯、烯丙基缩水甘油醚、乙烯基缩水甘油醚、邻-乙烯基苄基缩水甘油醚、间-乙烯基苄基缩水甘油醚、对-乙烯基苄基缩水甘油醚、丙烯腈、马来酸、富马酸、衣康酸、巴豆酸、α-甲基巴豆酸、肉桂酸以及它们的酸酐或酯。
用于本公开的所述(甲基)丙烯酸类聚合物可以是市售制品,也可以是合成品。
(甲基)丙烯酸类聚合物的Tg可由Fox方程计算得到。
1/Tg=∑iωi/Tg,i
其中,Tg,i是第i种成分的均聚物的玻璃化转变温度,ωi是第i种成分的重量分数。
在本公开的UV固化组合物中,所述(甲基)丙烯酸类聚合物的玻璃化转变温度Tg可以为-50~47℃,优选为-40~40℃,更优选为-30~30℃,特别优选为-20~20℃,例如为-20~0℃。当(甲基)丙烯酸类聚合物的Tg高于47℃或低于-50℃时,由该组合物得到的胶膜的搭接剪切强度(OLS)显著劣化。当(甲基)丙烯酸类聚合物的Tg为-40~30℃时,可以进一步显著提高胶膜的搭接剪切强度。
在本公开的UV固化组合物中,(甲基)丙烯酸类聚合物的数均分子量通常为20000~3000000,优选为50000~2000000,更优选为100000~1000000,聚合物的数均分子量由凝胶渗透色谱(GPC)测定。
乙烯-醋酸乙烯酯共聚物
用于本公开的所述乙烯-醋酸乙烯酯共聚物可以是市售制品,也可以是合成品。
在本公开中,乙烯-醋酸乙烯酯共聚物(EVA)的Tg同样可以用Fox方程计算得到,其Tg可以为-50~47℃,优选为-40~40℃,更优选为-30~30℃,特别优选为-20~20℃,例如为-20~0℃。当使用乙烯-醋酸乙烯酯共聚物(EVA)时,来自醋酸乙烯酯单体的单元比例为60重量%以上,优选80重量%以上,优选90重量%以上。来自醋酸乙烯酯单体的单元比例的上限可以为95重量%、96重量%、97重量%、98重量%或99重量%,共聚物中其余单元来自乙烯单体。当来自醋酸乙烯酯单体的单元的比例为60重量%以上时,由所述组合物得到的胶膜可以获得更高的搭接剪切强度。
多官能度硫醇
在本公开中,使用的多官能度硫醇是在分子中具有2个以上巯基(硫醇基)的化合物,优选具有3个以上巯基(硫醇基)的化合物。多官能度硫醇的实例包括:三羟甲基丙烷三硫代丙酸酯、季戊四醇四硫代丙酸酯、双巯基乙酸乙二醇酯、1,4-丁二醇双巯基乙酸酯、三羟甲基丙烷三巯基乙酸酯、季戊四醇四巯基乙酸酯、二(2-巯基乙基)醚、1,4-丁二硫醇、1,5-二巯基-3-硫杂戊烷、1,8-二巯基-3,6-二氧杂辛烷、1,3,5-三巯基甲基苯、4,4’-二巯基二苯硫醚、1,3,5-三巯基甲基-2,4,6-三甲基苯、2,4,6-三巯基-s-三嗪、2-二丁基氨基-4,6-二巯基-s-三嗪、季戊四醇四(3-巯基丙酸酯)、二季戊四醇六-3-巯基丙酸酯、含末端硫醇基的聚醚、含末端硫醇基的聚硫醚、通过环氧化合物与硫化氢的反应而得到的硫醇化合物、通过聚硫醇化合物与环氧化合物的反应而得到的具有末端硫醇基的硫醇化合物等,但并不仅限于这些。从固化性的观点看,优选具有3个以上巯基的硫醇化合物。
可以在本公开中使用的多官能度硫醇的市售产品例如有Japan Epoxy Resins株式会社制造的JER mate QX11、QX12、JER cure QX30、QX40、QX60、QX900、KAPUKYUA CP3-800,淀化学株式会社制造的OTG、EGTG、TMTG、PETG、3-MPA、TMTP、PETP,堺化学株式会社制造的TEMPIC、TMMP、PEMP、PEMP-II-20P、DPMP,Toray Fine Chemicals株式会社制造的THIOKOLLP-2、LP-3、聚硫醇QE-340M,昭和电工株式会社制造的KARENZ MT PE1、NR1、TPMB,TCI株式会社制造的PETMP等,但并不仅限于这些。这些化合物可以单独使用,也可以混合使用两种以上。
在本公开的UV固化组合物中,多官能度硫醇的含量为,相对于每100克(g)的(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,使用含有0.01摩尔~1.1摩尔巯基,优选0.1摩尔~1摩尔巯基,更优选0.2~0.9摩尔巯基,例如0.3~0.7摩尔巯基的多官能度硫醇。当相对于每100g的(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物含有的巯基处于上述范围时,组合物得到的胶带/胶膜的内聚强度较高,初粘性较好,可以获得更高搭接剪切强度。
多官能度环氧树脂
在本公开中使用的多官能度环氧树脂指的是平均每个分子中具有2个以上环氧基的环氧树脂。
多官能度环氧树脂一般有醚化多官能度酚的缩水甘油醚类、环氧化多官能度胺的缩水甘油胺类以及酯化多官能度酸的缩水甘油酯类、脂环族环氧、环氧化(聚)烯烃等。
缩水甘油醚类环氧树脂的实例包括双酚A型环氧树脂(亦称为E型环氧树脂)、四溴双酚A型环氧树脂、氢化双酚A型环氧树脂、双酚F型环氧树脂、双酚S型环氧树脂、线型酚醛多缩水甘油醚、线型邻酚甲醛多缩水甘油醚和间苯二酚甲醛环氧树脂等。
缩水甘油胺类环氧树脂由多元胺作为原料反应得到,其实例包括三缩水甘油基三异氰酸酯(TGIC)、三缩水甘油基对氨基苯酚(TGPAP)、四缩水甘油基二氨基二苯甲皖(TGDDM)、二异丙叉苯撑型四缩水甘油胺(TGBAP)、四甲基异丙叉苯撑四缩水甘油胺(TGMBAP)、N,N,N’,N’-四环氧丙基-4,4-二氨基二苯甲烷(TCDN)、N,N,N’,N’-四缩水甘油基-2,2-双[4-(4-氨基苯氧基)苯基]丙烷(TGBAPOPP)、N,N,N’,N’-四缩水甘油基-4,4’-甲撑二邻甲苯胺(TGMDT)和4,4’-二氨基二苯基醚四缩水甘油胺(TGDAE)。
缩水甘油酯类环氧树脂的实例包括邻苯二甲酸二缩水甘油酯、六氢邻苯二甲酸二缩水甘油酯、对苯二甲酸二缩水甘油酯、间苯二甲酸二缩水甘油酯、四氢邻苯二甲酸二缩水甘油酯、甲基四氢邻苯二甲酸二缩水甘油酯、内次甲基四氢邻苯二甲酸二缩水甘油酯和己二酸二缩水甘油酯等。
脂环族环氧的实例包括环氧环己烷羧酸酯、典型如3,4-环氧环己基甲基-3,4-环氧环己烷羧酸酯、3,4-环氧-2-甲基环己基甲基-3,4-环氧-2-甲基环己烷羧酸酯和双(3,4一环氧-6-甲基环己基甲基)己二酸酯。
其他可用的环氧树脂例如包含烯基氧化物(例如丁二烯氧化物)的环氧化(聚)烯烃,还有一些可用的环氧树脂包括环氧官能有机硅等。
在本公开中,可以使用液体环氧树脂,也可以使用固体环氧树脂。
在本公开的UV固化组合物中,多官能度环氧树脂的含量为,相对于每100g的(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,使用含有0.005摩尔~1.05摩尔环氧基,优选0.01摩尔~1摩尔环氧基,更优选0.1摩尔~0.9摩尔环氧基,例如0.2摩尔~0.8摩尔环氧基,或0.3摩尔~0.7摩尔环氧基的多官能度环氧树脂。当相对于每100g的(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物含有的环氧基处于上述范围时,组合物得到的胶带/胶膜的内聚强度可能较高,初粘性较好,可以获得更高搭接剪切强度。
在本公开中,多官能度硫醇中的巯基的摩尔量与多官能度环氧树脂中的环氧基的摩尔量的比优选为1:3~3:1,更优选1:2~2:1,再更优选为1.2:1~1:1.2。特别优选的是,多官能度环氧树脂与上述多官能度硫醇以约等当量使用。
光碱产生剂
光碱产生剂是一类在光的照射下可产生碱性物质的化合物。常见的光碱产生剂的实例包括钴氨络合物类、肟基酯类、季铵盐类、硼酸盐类等。作为在本公开中使用的光碱产生剂,可以使用现有技术中已知的那些光碱产生剂,例如本申请背景技术中所列举的文献(Photobase generators:Recent progress and application trend in polymersystems,Kanji Suyama,Masamitsu Shirai等,Progress in Polymer Science,2009,34,194–209.,WO2003033500A1和WO2015083331A1,在此通过援引并入本文)中所披露的光碱产生剂,只要这些光碱产生剂能够在光的照射下产生能够有效催化硫醇和环氧反应的碱性催化剂,起到催化作用即可。
在本公开的组合物中光碱产生剂通过产生碱性催化剂来催化固化反应进行,其固化不像光酸固化那样容易受到湿气和碱性物质的影响,不会对金属基材表面造成腐蚀,并且其固化效率高,少量的光碱产生剂即能够催化交联反应的进行,达到半结构胶或结构胶的强度。
光碱产生剂可以使用市售制品,也可以使用合成品。
在本公开的UV固化组合物中,光碱产生剂的用量可以根据需要固化的组合物的量合理确定。相对于每100g的所述(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述组合物含有0.5~20g的光碱产生剂,优选0.8~15g,更优选1~10g。当光碱产生剂的含量处于上述范围时,组合物可以充分固化,搭接剪切强度较高,并且可以避免光碱产生剂含量过高时可能从固化组合物中析出,从而影响固化组合物的初粘性和最终的粘结性能。
光敏剂
在本公开中,光敏剂可以与光碱产生剂组合使用,也可以不使用光敏剂。在不使用光敏剂的情况下,可以增大光碱产生剂的用量,以确保固化反应进行。
光敏剂只要是通过与光碱产生剂组合,可使组合物对光的活性增大的化合物即可,无论增敏机制是能量转移、电子转移还是质子转移等。特别是,从与光固化性的相容性良好、光固化性优异的观点看,优选芴类、芴酮类、蒽醌类、蒽酮类、荧蒽类、苄基缩酮类、α-羟基苯乙酮类、苯偶姻类、氨基苯乙酮类、肟酮类、酰基氧化膦类、萘衍生物、蒽衍生物、硝基苯甲酸、硝基苯胺或者如核黄素、玫瑰红、曙红、赤藓红、亚甲蓝或新亚甲蓝红等色素。
在本公开的组合物中,光敏剂的用量可以根据光碱产生剂的量合理确定。相对于每100g的所述(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述组合物含有0.15~10g的光敏剂,优选0.5~8g,更优选1~5g。
其他成分
本公开的组合物可以含有其他成分,如溶剂等。
其他成分的种类和含量没有特别限制,只要不影响本公开组合物的固化性和粘结性能即可。
当含有溶剂时,各种成分的含量以及组合物的重量均指的是以干重计。
胶膜/胶带
在本公开中,胶膜可以由本公开的UV固化组合物构成,将本公开的组合物涂布在基材或离型膜或离型纸上形成胶膜,可以得到胶带。胶带可以采用本领域常用结构。例如,可以是在胶膜两侧具有离型膜或离型纸的无基材胶带,也可以是在胶膜的一面为背面基材,另一面为离型膜或离型纸的单面胶带,或者可以是在基材两侧具有胶膜,进而在两侧胶膜之外具有离型膜或离型纸的有基材双面胶带。
图2是本公开的不含基材的胶带的示意图。附图标记1为由本公开的组合物制造的胶膜,附图标记2和3为离型膜或离型纸,两个离型膜或离型纸可以相同也可以不同。作为离型膜或离型纸,可以使用现有技术中已知的离型膜或离型纸,如PET离型膜、玻璃纸、层压纸和聚丙烯薄膜等。
图3是本公开的单面胶带的示意图。附图标记1为由本公开的组合物制造的胶膜,附图标记2为离型膜(或离型纸),附图标记4为胶带背面基材。胶带背面基材可以使用现有技术中已知的基材。
图4是本公开的包含基材的双面胶带的示意图。附图标记5为基材。附图标记1为胶膜,两个胶膜可以相同也可以不同。附图标记2和3为离型膜(或离型纸)。基材5可以是现有技术中已知的基材。
粘结构件
本公开的UV固化组合物或者胶膜/胶带可以用于粘结各种产品(例如电子产品,如手机、电脑、智能手表等)中的零件,从而形成粘结构件。
粘结构件通常包括使用所述UV固化组合物或者胶膜粘结的第一部件和第二部件,其中,第一部件与第二部件可以相同或不同,可以是各种可以粘结的零件或部件。当使用胶膜时,第一部件和第二部件中的一个可以是基材。
实施例
下面参照实施例对本发明进行进一步的详细说明。应理解,本发明并不局限于下述实施例。除非另有说明,“份”均指的是“重量份”,“%”均指的是“重量%”,“g”均指重量单位“克”。
在本申请中所使用的原材料如下表所示。
测试方法
初始剥离力的测试
该测试测量了以180度的角度剥离胶带所需的力,参照剥离力测试方法ASTMD3330,对实施例中的胶带进行测试,具体如下,
测试前用异丙醇擦拭不锈钢板三次。将以50微米PET为背面基材的单面胶带切成0.5英寸,揭去离型膜,贴于一个不锈钢板上,用2kg的力滚压两次。在剥离测试之前,将胶带在受控环境室(23℃/50%相对湿度)中放置30min,采用Instron公司的拉力测试机进行测试,速度为12英寸/min。每个测试重复两次取平均值,单位为N/mm。
搭接剪切强度(OLS)的测试
搭接剪切强度按照ASTM 1002进行,具体如下。
测试前用异丙醇擦拭铝制样条(4英寸×1英寸×0.0625英寸)三次。将两面都是离型膜的胶膜样品切成0.5英寸×1英寸,揭去一侧离型膜,贴于一个铝条上。揭去另一侧离型膜,照射UV(Fusion D灯,UVA约为3000mJ/cm2),将另一个铝条贴于另一侧胶面。将测试样条放在受控环境室(23℃/50%相对湿度)中进行后固化约3~4天,再进行测试。或者将制备好的样条放在80℃烘箱中加速固化1小时,从烘箱中取出后,将测试样条在受控环境室(23℃/50%相对湿度)中放置1天后再进行测量。
作为对比试验,对未进行UV照射的胶带样品进行OLS的测试。测试前用异丙醇擦拭铝制样条(4英寸×1英寸×0.0625英寸)三次。将两面都是离型膜的胶带样品切成0.5英寸×1英寸,揭去一侧离型膜,贴于一个铝条上。揭去另一侧离型膜,将另一个铝条贴于另一侧胶面,将试样放于80℃烘箱中1小时,取出样品放于受控环境室(23℃/50%相对湿度)中,放置1天后再进行测量。
搭接剪切强度采用Instron公司拉力测试器进行测试。速度为5.0mm/min。每个测试重复三次,取平均值,单位为MPa。
合成例
合成例1
光碱产生剂HDBU·BPh4按照以下文献合成,Molecular Recognition ofEnolates of Active Methylene Compounds in Acetonitrile.The Interplay betweenComplementarity and Basicity,and the Use of Hydrogen Bonding to Lower GuestPKaS,Anne M.Kelly-Rowley,Vincent M.Lynch,Eric V.Anslyn等,J.Am.Chem.SOC.1995,117,3438-3447,合成方法如下。
将10重量%稀盐酸逐滴滴入DBU(12.9g)中至pH为中性。将NaBPh4(30.5g)水溶液滴入酸化的DBU溶液中,得到白色沉淀。分离白色沉淀,重结晶,得到HDBU·BPh4纯品。
合成例2
将80份MA,15份BA,5份GMA,0.2份VAZO 67,150份EA混合于玻璃瓶中,通入氮气两分钟除去氧气并密封,将反应瓶放在聚合设备中60℃进行聚合反应24h,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例3
按照合成例2中的方法,用52份MA,43份BA,5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例4
按照合成例2中的方法,用58份MA,40.5份BA,1份AA,0.5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例5
按照合成例2中的方法,用20份MA,60份BA,15份ACMO,5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例6
按照合成例2中的方法,用8份BMA,77份BA,10份2-HEA,5份ACMO,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例7
按照合成例2中的方法,用65份BA,20份2-EHA,10份2-HEA,5份ACM,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例8
按照合成例2中的方法,用21.5份2-EHA,75份BA,3.5份AA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例9
按照合成例2中的方法,用55份MMA,40份BA,5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例10
按照合成例2中的方法,用61.5份MMA,33.5份BA,5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例11
按照合成例2中的方法,用67份MMA,28份BA,5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例12
按照合成例2中的方法,用69.5份MMA,25.5份BA,5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例13
按照合成例2中的方法,用72份MMA,23份BA,5份GMA,制备溶剂基(甲基)丙烯酸类聚合物,固含量为40%。
合成例14
按照合成例2中的方法,用47份MA,45份BA,2份2-HEA,6份ACMO制备溶剂基(甲基)丙烯酸类聚合物,固含量为34.4%。
将100份上述的溶液(固含量34.4%),0.46份MOI,一滴Sn催化剂,30份MEK混合于玻璃瓶中,将混合物在室温反应12小时。反应后的聚合物溶液固含量为26.5%。
表1.通过Fox方程计算得到的合成例中(甲基)丙烯酸类聚合物的玻璃化转变温度(Tg)
实施例
实施例E1
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.4份PETMP,30.7份EPON 828,2份PBD02,1份ITX混合均匀,一部分涂布于离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C1
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.4份PETMP,30.7份EPON 828混合均匀,一部分涂布于离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C2
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.4份PETMP,2份PBD02,1份ITX混合均匀,一部分涂布于离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C3
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),30.7份EPON 828,2份PBD02,1份ITX混合均匀,一部分涂布于离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C4
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.4份PETMP,30.7份EPON 828,1份ITX混合均匀,一部分涂布于离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C5
将80份MA,15份BA,5份GMA,21.4份PETMP,30.7份EPON 828,2份PBD02,1份ITX混合均匀,涂布于离型膜上,发生明显缩孔现象。这说明采用丙烯酸酯单体的配方不具有良好的涂布性能,在固化之前没有初始内聚强度。
对比例C6
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),5.3份季戊四醇,30.7份EPON 828,2份PBD02,1份ITX混合均匀,一部分涂布于离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。
表2.实施例E1和对比例C1~C4及C6在照射和未照射UV条件下的搭接剪切强度(OLS)
实施例和对比例 | OLS(MPa) |
E1-UV | 8.7 |
E1-无UV | 0.94 |
C1-UV | 0.99 |
C1-无UV | 0.78 |
C2-UV | 0.85 |
C3-UV | 0.89 |
C4-UV | 0.75 |
C6-UV | 0.68 |
对于实施例E1的胶膜,进行UV照射并经历80℃后固化过程后,搭接剪切强度为8.7MPa;而未进行UV照射的样品,固化搭接剪切强度有0.94MPa。而未加入光碱产生剂和光敏剂的对比例C1,不论是否进行UV照射,该样品都没有固化,搭接剪切强度都很低。而未加入环氧树脂的对比例C2、未加入硫醇的对比例C3和未加入光碱产生剂的对比例C4,即使进行UV照射,该样品都没有固化,搭接剪切强度都很低。而加入(甲基)丙烯酰类单体代替(甲基)丙烯酸类聚合物的对比例C5,在涂布后发生明显缩孔现象,无法制备成胶膜,所涂布的产品外观差,没有初粘性,不可以模切。而加入多元醇(季戊四醇)代替多官能硫醇的对比例C6,即使进行UV照射,搭接剪切强度也很低,无法达到本发明的效果。
实施例E1同样可以在室温固化,不同室温固化时间的OLS参见图1,室温固化4天后,实施例E1的胶膜的OLS达到8.9MPa。
实施例E2
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.3份EPON 828,0.35份PBD02,0.18份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E3
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.3份EPON 828,1份PBD02,0.5份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E4
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.3份EPON 828,5份PBD02,2.5份ITX混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E5
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.3份EPON 828,8份PBD02,4份ITX混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C7
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.3份EPON 828,0.10份PBD02,0.05份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C8
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.3份EPON 828,12份PBD02,6份ITX混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
涂布后光碱产生剂(PBD02)从胶带中析出,无法进行胶带测试(NM)。
表3.实施例E2~E5和对比例C7和C8中各成分的含量及粘结性能
*聚合物是指(甲基)丙烯酸类聚合物或者乙烯-醋酸乙烯酯共聚物,下同。
如表3所示,在对比例C7中,当光碱产生剂比例太少时,胶膜不能充分固化,搭接剪切强度只有0.8MPa。而在对比例C8中,当光碱产生剂比例太高时,会造成光碱产生剂从胶带中析出,从而影响胶带的初粘性和最终的粘结性能。
实施例E6
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),1.3份KARENZ MT PE1,0.7份EPON 828,1.0份PBD02,0.5份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E7
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),1.9份KARENZ MT PE1,1.5份EPON 828,1.1份PBD02,0.5份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E8
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),6.0份KARENZ MT PE1,7.3份EPON 828,1.3份PBD02,0.6份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E9
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),9.7份KARENZ MT PE1,12.5份EPON 828,1.4份PBD02,0.7份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E10
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),14.7份KARENZ MT PE1,19.5份EPON 828,1.7份PBD02,0.8份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E11
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),32.0份KARENZ MT PE1,43.8份EPON 828,2.5份PBD02,1.3份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E12
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),49.3份KARENZ MT PE1,68.1份EPON 828,3.3份PBD02,1.7份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E13
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),63.2份KARENZ MT PE1,87.6份EPON 828,4份PBD02,2份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C9
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),1份PBD02,0.5份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C10
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),83.9份KARENZ MT PE1,116.8份EPON 828,4份PBD02,2份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
表4.实施例E6~E13和对比例C9和C10中各成分的含量及粘结性能
如表4所示,在对比例C9中,当不加入多官能度硫醇和多官能度环氧树脂时,搭接剪切强度低于1MPa,不能满足要求;而在对比例C10中,当多官能度硫醇和多官能度环氧树脂的比例过高时,胶带/胶膜内聚强度很差,初始剥离力只有0.1N/mm,不能满足要求。
实施例E14
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E15
将125份合成例4的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E16
将125份合成例5的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E17
将125份合成例6的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E18
将125份合成例7的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E19
将125份合成例9的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E20
将125份合成例10的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MTPE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E21
将125份合成例11的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MTPE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E22
将125份合成例12的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MTPE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E23
将189份合成例14的(甲基)丙烯酸类聚合物(26.5%固含量),21.6份KARENZ MTPE1,29.2份EPON 828,2份PBD02,1份ITX混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C11
将125份合成例8的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C11制备的胶膜OLS较低。
对比例C12
将125份合成例13的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MTPE1,29.2份EPON 828,2份PBD02,1份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C12制备的胶带/胶膜初粘性很差,无法进行相应测试。
表5.实施例E14~E23和对比例C11和C12中聚合物的Tg及粘结性能
实施例和对比例 | Tg(℃) | 初始剥离力(N/mm) | 搭接剪切强度(MPa) |
E14 | -20 | 0.47 | 8.1 |
E15 | -20 | 0.5 | 7.9 |
E16 | -20 | 0.49 | 8.2 |
E17 | -40 | 0.35 | 7.2 |
E18 | -48 | 0.32 | 3.3 |
E19 | 19 | 0.43 | 8.4 |
E20 | 30 | 0.50 | 7.3 |
E21 | 40 | 0.21 | 2.7 |
E22 | 45 | 0.22 | 2.7 |
E23 | -20 | 0.42 | 10.9 |
C11 | -54 | NM | 0.90 |
C12 | 50 | NM | NM |
如表5所示,在实施例14-23中,当(甲基)丙烯酸类聚合物的玻璃化转变温度在-50~47℃之间时,所得到的胶膜的性能较好。在对比例C11中,当Tg低于-50℃时,所得的胶膜和PET基材的结合力差,初粘性不好,初始剥离力无法测定,其搭接剪切强度不足;在对比例C12中,当Tg高于47℃时,所得的胶带/胶膜初粘性不好,初始剥离力和搭接剪切强度无法测定。特别是,在实施例E17和E20中,当Tg为-40~30℃时,搭接剪切强度超过7MPa,取得了特别优异的技术效果。
实施例E24
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),88.3份KARENZ MT NR1,87.6份EPON 828,4.5份PBD02,2.2份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E25
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),64份KARENZ MT PE1,52.5份EPON 828,105.5份NPES-901,5.5份PBD02,2.8份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C13
将125份合成例3的(甲基)丙烯酸类聚合物(40%固含量),64份KARENZ MT PE1,255份NPES-901,7.3份PBD02,3.6份EAQ混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C13所制得的胶膜没有初粘性,无法进行测试初始剥离力。
表6.实施例E24和E25和对比例C13中各成分的含量及粘结性能
NPES-901为固体环氧树脂。由以上实施例和对比例可知,在实施例E25中,当加入固体环氧树脂时,胶膜仍然能够固化,达到一定的结构强度;在对比例C13中,当固体环氧树脂的比例过高时,胶膜容易失去初粘性。
实施例E26
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,1份UCAT5002,0.5份ITX混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E27
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,1份HDBU·BPh4,0.5份ITX混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E28
将125份合成例2的(甲基)丙烯酸类聚合物(40%固含量),21.6份KARENZ MT PE1,29.2份EPON 828,2份HDBU·BPh4,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
表7.实施例E26~E28的粘结性能
实施例和对比例 | 搭接剪切强度(MPa) |
E26 | 8.9 |
E27 | 10.2 |
E28 | 9.3 |
如表7所示,在实施例E26-28中,当使用其他光碱产生剂,例如UCAT5002和HDBU·BPh4时,胶膜依然能够固化,并显示出优异的粘结能力。
实施例E29
将37.5份LEVAPREN 800(来自醋酸乙烯酯单体的单元重量比为80%的乙烯-醋酸乙烯酯共聚物)和12.5份LEVAPREN 700(来自醋酸乙烯酯单体的单元重量比为70%的乙烯-醋酸乙烯酯共聚物)溶解于116.7份乙酸乙酯中,加入0.85份KARENZ MT PE1,1.2份EPON828,1.1份PBD02,0.5份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E30
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入3.3份KARENZ MT PE1,3.2份EPON 828,1.1份PBD02,0.6份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E31
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入20.8份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E32
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入62.4份KARENZ MT PE1,87.6份EPON 828,4份PBD02,2份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E33
将50份LEVAPREN 900溶解于116.7份乙酸乙酯中,加入20.8份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E34
将50份LEVAPREN 600溶解于116.7份乙酸乙酯中,加入20.8份KARENZ MT PE1,29.2份EPON 828,2份PBD02,1份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
实施例E35
将50份LEVAPREN 600 NPG VP溶解于116.7份乙酸乙酯中,加入20.8份KARENZ MTPE1,29.2份EPON 828,2份PBD02,1份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C14
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入1份PBD02,0.5份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C15
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入83.2份KARENZ MT PE1,116.8份EPON 828,5份PBD02,2.5份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C16
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入20.8份PE1,2份PBD02,1份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度为75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
对比例C17
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入29.2份EPON 828,2份PBD02,1份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,90℃干燥15min,干膜厚度75μm,干燥后在胶膜表面覆一层离型膜,用于后续测量初始剥离力。
对比例C18
将50份LEVAPREN 800溶解于116.7份乙酸乙酯中,加入20.8份PE1,29.2份EPON828,1份EAQ,混合均匀,一部分涂布于PET离型膜上,在90℃干燥15min,干膜厚度75μm,干燥后在胶膜表面覆盖另外一层离型膜,用于后续测定OLS。另一部分涂布于50微米PET上,在90℃干燥15min,干膜厚度75μm,干燥后在胶膜表面覆盖一层离型膜,用于后续测量初始剥离力。
表8.实施例E29~E32和对比例C14~C18中各成分的含量及粘结性能
如上表8所示,在对比例C14中,当不加入硫醇和环氧时,胶膜的初始剥离力无法测定,搭接剪切强度很低;在对比例C15中,当硫醇/环氧的加入量过高时,胶带的初始内聚强度较差,不能满足要求。在未加入环氧树脂的对比例C16、未加入硫醇的对比例C17和未加入光碱产生剂的对比例C18中,即使进行UV照射,该样品搭接剪切强度也很低。在实施例E29-35中,当EVA中来自醋酸乙烯酯单体的单元比例为60重量%以上时,可以获得优异的搭接剪切强度。当EVA中来自醋酸乙烯酯单体的单元比例为80重量%以上时,可以获得更加优异的搭接剪切强度。
以上提供了实施例以进一歩描述本发明,但是应当理解,本发明的保护范围以后附权利要求书为准而不限于所述实施例。本领域技术人员应当理解,在不背离本发明范围的情况下,可以进行多种修改和改变。这样的修改和改变应落入如所附权利要求所限定的本发明的范围之内。
Claims (17)
1.一种UV固化组合物,该UV固化组合物包含:
(1)(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述(甲基)丙烯酸类聚合物和乙烯-醋酸乙烯酯共聚物的玻璃化转变温度Tg为-50~47℃;
(2)可固化成分,所述可固化成分含有多官能度硫醇和多官能度环氧树脂,所述多官能度硫醇为分子中具有2个以上巯基的硫醇化合物,优选具有3个以上巯基的硫醇化合物,所述多官能度环氧树脂为平均每个分子中具有2个以上环氧基的环氧树脂;和
(3)光碱产生剂。
2.如权利要求1所述的UV固化组合物,其中,相对于每100克的所述(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述组合物含有:
包含0.01摩尔~1.1摩尔巯基的多官能度硫醇;
包含0.005摩尔~1.05摩尔环氧基的多官能度环氧树脂;和
0.5~20克的光碱产生剂。
3.如权利要求2所述的UV固化组合物,其中,相对于每100克的所述(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述组合物含有:
包含0.1摩尔~1摩尔巯基的多官能度硫醇,优选包含0.2~0.9摩尔巯基的多官能度硫醇,更优选包含0.3~0.7摩尔巯基的多官能度硫醇;和
包含0.1摩尔~0.9摩尔环氧基的多官能度环氧树脂,优选包含0.2摩尔~0.8摩尔环氧基的多官能度环氧树脂,更优选包含0.3摩尔~0.7摩尔环氧基的多官能度环氧树脂。
4.如权利要求2所述的UV固化组合物,其中,所述多官能度硫醇中的巯基的摩尔量与所述多官能度环氧树脂中的环氧基的摩尔量的比为1:3~3:1,优选为1:2~2:1,更优选为1.2:1~1:1.2。
5.如权利要求1~4中任一项所述的UV固化组合物,其中,相对于每100克的所述(甲基)丙烯酸类聚合物和/或乙烯-醋酸乙烯酯共聚物,所述组合物还含有:
0.15~10克的光敏剂。
6.如权利要求1~4中任一项所述的UV固化组合物,
其中,在所述乙烯-醋酸乙烯酯共聚物中,来自醋酸乙烯酯单体的单元比例为60重量%以上,优选80重量%以上;
其中,形成所述(甲基)丙烯酸类聚合物的单体选自:
(a)非功能性(甲基)丙烯酸类单体,和/或
(b)含有极性官能团的(甲基)丙烯酰类单体,和/或
(c)含有交联性官能团的(甲基)丙烯酰类单体。
7.如权利要求6所述的UV固化组合物,其中,所述非功能性(甲基)丙烯酸类单体选自(甲基)丙烯酸烷基酯或(甲基)丙烯酸芳基酯,优选(甲基)丙烯酸C1-12烷基酯,更优选(甲基)丙烯酸C1-8烷基酯。
8.如权利要求6所述的UV固化组合物,其中,所述极性官能团为选自羟基、醚基、氨基和酰胺基的一种或多种,例如所述醚基为吗啉基或四氢呋喃基中的醚基。
9.如权利要求6所述的UV固化组合物,其中,所述交联性官能团为选自羧基、酸酐基和环氧基中的一种或多种,例如所述环氧基为缩水甘油基中的环氧基。
10.如权利要求6所述的UV固化组合物,其中,所述(甲基)丙烯酸类聚合物还包含来自非(甲基)丙烯酰类单体的烯键式不饱和单体的单元。
11.如权利要求10所述的UV固化组合物,所述烯键式不饱和单体选自带有极性官能团的单体或带有交联性官能团的单体。
12.如权利要求1~4中任一项所述的UV固化组合物,其中,所述(甲基)丙烯酸类聚合物和乙烯-醋酸乙烯酯共聚物的玻璃化转变温度Tg为-40~40℃,优选为-30~30℃,更优选为-20~20℃,例如-20~0℃。
13.一种胶膜,所述胶膜包含权利要求1~12中任一项所述的UV固化组合物。
14.如权利要求13所述的胶膜,所述胶膜具有可模切性,在未进行UV固化时初始剥离力不低于0.2N/mm,优选不低于0.3N/mm,UV固化后搭接剪切强度不低于1MPa,优选不低于5MPa,更优选不低于7MPa。
15.一种胶带,所述胶带包含权利要求13或14所述的胶膜。
16.一种粘结构件,其包括:使用权利要求1~12中任一项所述的UV固化组合物或者权利要求13或14所述的胶膜或者权利要求15所述的胶带粘结的第一部件和/或第二部件。
17.如权利要求16所述的粘结构件,其中,所述UV固化组合物或胶膜是固化后的UV固化组合物或胶膜,和/或
所述第一部件或第二部件是基材。
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Publication number | Publication date |
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EP3814422B1 (en) | 2023-01-04 |
CN110643286B (zh) | 2021-11-19 |
WO2020003041A2 (en) | 2020-01-02 |
EP3814422A2 (en) | 2021-05-05 |
US20210363276A1 (en) | 2021-11-25 |
WO2020003041A3 (en) | 2020-02-27 |
US11479621B2 (en) | 2022-10-25 |
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