CN102449094A - 紫外辐射可固化压敏丙烯酸类粘合剂 - Google Patents

紫外辐射可固化压敏丙烯酸类粘合剂 Download PDF

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CN102449094A
CN102449094A CN2010800229650A CN201080022965A CN102449094A CN 102449094 A CN102449094 A CN 102449094A CN 2010800229650 A CN2010800229650 A CN 2010800229650A CN 201080022965 A CN201080022965 A CN 201080022965A CN 102449094 A CN102449094 A CN 102449094A
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ester
sensitive adhesive
monomer
curable pressure
hydroxy
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CN102449094B (zh
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T·E·哈蒙德
X·胡
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Arkema France SA
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Ashland Licensing and Intellectual Property LLC
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Abstract

本发明公开了一种通过由羟基官能丙烯酸酯单体和二异氰酸酯制备的衍生化试剂对丙烯酸类聚合物进行衍生化而制备UV可固化压敏粘合剂组合物的方法。所述衍生化试剂一般具有大于约1∶1的羟基官能丙烯酸酯单体对二异氰酸酯的比例。还公开了用该衍生化试剂制备的UV可固化压敏粘合剂和用压敏粘合剂组合物粘合基材的方法。

Description

紫外辐射可固化压敏丙烯酸类粘合剂
相关申请的交叉引用
本申请要求享有于2009年4月3日提交的美国专利申请61/166,431的权益。将美国专利申请61/166,431在此援引加入。
技术领域
本发明涉及一种通过用由二异氰酸酯和羟基官能丙烯酸酯单体制备的衍生化试剂衍生化丙烯酸类聚合物如羟基官能丙烯酸类聚合物来制备紫外(“UV”)可固化压敏粘合剂(“PSA”)的方法。
背景技术
基于溶剂的PSA一般具有低固含量例如约40％-约55％的固体。由溶液进行涂覆的方法通常限制了常见应用的有效涂覆厚度，因为难以从厚膜中蒸发溶剂。然而，对于许多应用，需要较厚的膜。热熔胶提供了一种容易产生厚膜的途径。历史上，大多数热熔胶是基于橡胶的，在性能上有局限。
UV可固化丙烯酸类热熔PSA提供了对于基于橡胶的热熔胶潜在有吸引力的替代方案，因为轻度交联的丙烯酸类粘合剂具有与基于橡胶的粘合剂相比优异的剥离和剪切性能、以及显著的气候和老化性能。然而，很多对于UV可固化丙烯酸类PSA上的努力对于厚薄膜应用的商业成功有局限性。这通常由于较厚的膜在膜的整个深度上固化均匀性不足。
对于UV可固化PSA在某些商业应用中的主要局限是由于光引发剂本体的性质。对于这些粘合剂产物，光引发剂通过丙烯酸酯二苯甲酮的自由基聚合而引入到丙烯酸类聚合物骨架中。引入的二苯甲酮的量为约0.5％-约1.0％。二苯甲酮基团是非常强的UV吸收剂，并且当由UV激发时是强的去氢剂。去氢过程导致产生自由基。当这些自由基再结合时，其导致聚合物的轻度交联。交联是将熔融可流动的聚合物转化为合适的PSA的关键。然而，对于基于二苯甲酮的聚合物的固化存在深度上的限制。由于二苯甲酮在258nm处的强吸收，在这个波长的UV辐射不能通过超过约70μm(约2.7mils)的样品深度。因此，从实际目的出发，基于二苯甲酮的UV可固化PSA只能在2mils或更小的厚度上均匀固化。
在UV可固化丙烯酸类热熔PSA领域的其它专利有包含内在的光引发剂和烯属组分的组合以促进交联的粘合剂组合物。另外，丙烯酸酯官能聚氨酯已经作为UV可固化温热熔融PSA出售。所有这些热熔PSA是100％固体，在施用期间没有挥发性有机化合物(“VOC”)，免去了对干燥炉和焚烧炉/热氧化剂的需求。
除非另有说明，本文给出的所有份数和百分比是基于重量。
发明内容
本发明涉及一种由羟基官能化丙烯酸类聚合物制备UV可固化PSA的方法，其包括用由二异氰酸酯和羟基官能丙烯酸酯单体制备的衍生化试剂对所述聚合物进行衍生化。在所述丙烯酸酯类聚合物中的羟基与衍生化试剂反应形成氨基甲酯键。该方法得到了能通过UV辐射固化的丙烯酸酯官能丙烯酸类聚合物。
所述衍生化试剂由在两个异氰酸酯基之间具有不同反应性的二异氰酸酯制得，使得与一当量的羟基官能丙烯酸酯单体的反应主要产生单氨基甲酸酯，而不是单氨基甲酸酯、二氨基甲酸酯和未反应的二异氰酸酯的无规分布。通过主要产生丙烯酸酯化的单氨基甲酸酯而几乎没有或没有残留的二异氰酸酯，加入到羟基官能丙烯酸类聚合物不会导致明显的分子量增加。残留的异氰酸酯将简单地加入在丙烯酸类聚合物中的醇基并产生丙烯酸酯官能丙烯酸类聚合物。该丙烯酸酯官能化的丙烯酸类聚合物能在比二苯甲酮取代的UV可固化PSA产品更大的粘合剂薄膜厚度上进行UV固化。
通常，丙烯酸酯官能化丙烯酸类聚合物本身不是UV可固化的。因此，在该方法中丙烯酸类聚合物必须与合适的光引发剂添加剂配制。所述粘合剂还可包含填料和添加剂如增粘剂、交联剂、稳定剂、抑制剂、溶剂、增塑剂等及其组合。
可将PSA应用于粘合材料的方法。该方法包括以下步骤：提供用于PSA的基底材料，将PSA施加到基材的表面上，UV固化粘合剂以及将该基底材料与另一种基底材料接合并粘合，优选在施加压力下。
附图说明
图1显示了根据本发明的实施方案的官能化丙烯酸类聚合物。
具体实施方式
羟基官能化聚合物一般为分子量为约40,000-约100,000的丙烯酸类聚合物。可用于本发明的丙烯酸类单体包括大量的产生低玻璃化转变温度(Tg)聚合物的单体。这样的单体包括选自丙烯酸2-乙基己基酯、丙烯酸异辛基酯、丙烯酸异癸基酯、丙烯酸月桂基酯、丙烯酸正丁酯等及其组合的那些。
丙烯酸类聚合物还可包括改变Tg的单体，如选自丙烯酸甲酯、丙烯酸乙酯、甲基丙烯酸甲酯、苯乙烯、乙酸乙烯酯及其组合的那些。对于用异氰酸酯衍生化，必须将至少一种羟基官能单体结合到丙烯酸类聚合物的骨架中。采用Fox等式，在衍生化和UV固化之前丙烯酸类聚合物的计算的Tg理论上应该为约-35℃至约-50℃，优选约-40℃至约-45℃。这些羟基官能单体，骨架羟基官能单体和衍生化试剂的羟基官能单体是不同的，所述衍生化试剂的羟基官能单体是试剂羟基官能单体。可结合到丙烯酸类聚合物的骨架中的羟基官能单体的实例包括：丙烯酸2-羟乙基酯、甲基丙烯酸2-羟乙基酯、丙烯酸2-羟丙基酯、甲基丙烯酸2-羟丙基酯、丙烯酸4-羟丁基酯等及其组合。该丙烯酸类聚合物还可以包含其它官能单体以提高粘附性能，例如选自丙烯酸、甲基丙烯酸、马来酸酐、甲基丙烯酸缩水甘油酯、N-乙烯基吡咯烷酮、N-乙烯基己内酰胺和丙烯酰胺及其组合的那些。
制备衍生化试剂使得在加合物中的大多数分子，如果不是所有的分子，将包含至少约一个反应性异氰酸酯基团，在一个实施方案中在衍生化试剂中的大多数分子包含一个反应性异氰酸酯基团。该异氰酸酯基团与丙烯酸类聚合物中的羟基反应形成氨基甲酸酯键，该键将丙烯酸酯双键连接到丙烯酸类聚合物上。该连接使得丙烯酸类聚合物对自由基聚合反应有反应性。可用于本发明的典型的官能化丙烯酸类聚合物显示在图1中。
衍生化试剂由二异氰酸酯和羟基官能丙烯酸酯单体、试剂羟基官能单体制备。二异氰酸酯通常在两个异氰酸酯基团之间具有不同的反应性，使得只有一个异氰酸酯能优先与衍生化试剂的羟基官能丙烯酸酯单体反应，另一个异氰酸酯留待以后与丙烯酸类聚合物反应。可用于本发明的二异氰酸酯包括异佛尔酮二异氰酸酯、甲苯二异氰酸酯等及其组合。在衍生化试剂中的羟基官能丙烯酸酯单体可选自丙烯酸2-羟乙基酯、丙烯酸2-羟丙基酯、丙烯酸4-羟丁基酯、甲基丙烯酸2-羟乙基酯、甲基丙烯酸2-羟丙基酯等及其组合。也可使用专门的羟基官能丙烯酸酯如己内酯丙烯酸酯(SARTOMER
Figure BDA0000112398540000041
495，来自Sartomer Company，Inc.，Exton，Pennsylvania)或来自HEXIONTM Specialties Chemicals，Columbus，Ohio的ACETM羟基丙烯酸酯单体。
在衍生化试剂中羟基官能丙烯酸酯单体对二异氰酸酯的比例一般大于约1∶1，优选大于约1.1∶1。在本发明的实施方案中，在衍生化试剂中羟基官能丙烯酸酯单体对二异氰酸酯的比例为约1.1∶1-约1.5∶1，一般为约1.05∶1-约1.5∶1，优选为约1.12∶1-约1.2∶1。羟基官能丙烯酸酯单体对二异氰酸酯的一般比例为约1.05∶1-约1.2∶1。在低比例的羟基官能丙烯酸酯单体对二异氰酸酯下，经常仍有二异氰酸酯存在于衍生化试剂中。如果太多的自由二异氰酸酯存在于衍生化试剂中，二异氰酸酯与丙烯酸类聚合物中的羟基的反应导致明显的分子量增加，这使得聚合物难以或者不可能进行加工，甚至可能导致丙烯酸类聚合物的凝胶化。在衍生化试剂中羟基官能丙烯酸酯单体对二异氰酸酯的比例大于1∶1的情况下，存在部分二异氰酸酯，其与衍生化试剂中的两个羟基官能丙烯酸酯单体反应变成二氨基甲酸酯。该物质不能起到衍生化试剂的作用，而是简单地变成用于聚合物UV固化的反应性稀释剂和双官能交联剂。
与聚合物反应的衍生化试剂的量与粘合剂的性质有关。如果反应太少，在UV固化期间聚合物不会充分交联产生良好的性质。如果反应太多，在UV固化期间聚合物将过度交联，性质可能会受损害。在实施方案中，PSA组合物中羟基官能丙烯酸二异氰酸酯衍生化试剂的含量应当优选为约2.0重量％-约9.0重量％固体，优选约3.5重量％-约7.5重量％固体。衍生化试剂的量是丙烯酸类聚合物分子量的函数。在低分子量下，可能需要较高程度的衍生化，而在较高的分子量下，可能需要较低程度的衍生化。
将衍生化的丙烯酸类聚合物掺入到UV可固化PSA组合物中。包含衍生化的丙烯酸类聚合物的PSA组合物可以是用于热熔应用的100％固体组合物。同样，该PSA组合物可以是溶液粘合剂的形式，包括固含量为约50％-约80％，优选约60％-约75％的那些。
除衍生化的丙烯酸类聚合物外，UV可固化PSA组合物还包含在UV曝光期间产生自由基且诱导活性丙烯酸酯基团的自由基聚合的光引发剂。可使用各种类型的光引发剂。光引发剂可选自可商购的光引发剂，只要光引发剂与所用的UV灯相配，并且粘合剂中不存在将阻止光引发剂的UV吸收的强吸收组分即可。当使用UV可固化单体和包含芳香族官能团的添加剂时必须小心操作。大多数光引发剂在UV光谱的250-300nm区域强吸收，但大多数其它芳族化合物也能在该区域吸收。
光引发剂组分可包括Norrish类型I或类型II引发剂或其组合。当由UV激发时Norrish类型I引发剂裂解成两种自由基物质。这一种或者两种自由基都可诱导聚合。可用于本发明的Norrish类型I光引发剂的实例包括苯偶酰、安息香醚、苯偶酰酯、羟苯乙酮、氧化膦等及其组合。当激发时，Norrish类型II引发剂去掉氢基。活性聚合引发剂一般是失去氢基的物质。可用于本发明的Norrish类型II引发剂的实例包括二苯甲酮、噻吨酮等及其组合。
在可见光区域工作的光引发剂是非常有效的，因为在这个区域一般不存在其它强吸收剂，这样的光引发剂可在较厚的样品上提供良好的彻底固化，例如当把较厚的一层或多层UV可固化PSA层施加到基材上时。氧化膦例如单酰基氧化膦(如Daracure TPO)或双酰基氧化膦(“BAPO”)(如IRGACURE
Figure BDA0000112398540000051
819)在这方面是有效的。
可选择光引发剂以提供良好的表面固化，因为需要必需的自由基通量来克服在空气中UV固化时粘合剂表面的氧抑制。这方面可采用二苯甲酮、安息香醚、羟苯乙酮等及其组合。在UV可固化PSA组合物的实施方案中，表面固化可能是关键的，因为其为粘合剂与基材的接触点。没有完全的表面固化，当把粘合剂除去时，固化不足的粘合剂层可能转移到基材上。这种情况被称作残影(ghosting)，这是UV固化的粘合剂常见的问题。
可使用如上所述的光引发剂的组合。例如，光引发剂组分可包括羟苯乙酮(如Duracure 1173、IRGACURE184或ESACURE
Figure BDA0000112398540000053
KIP150)和二苯甲酮。在其中PSA将以较厚的膜施加的应用中，光引发剂可包含BAPO以提供良好的穿透固化。在本发明的实施方案中，光引发剂包含羟苯乙酮和二苯甲酮的组合，并且可包含羟苯乙酮、二苯甲酮和BAPO的组合。
此外，该UV可固化PSA组合物可包含一种或多种抑制剂。因为UV可固化PSA组合物包含反应性丙烯酸酯基团，在涂层的储存或制备中可存在适宜的自由基清除剂以防止过早的胶凝化，尤其是对于热熔胶组合物的情况。包含酚类化合物的抑制剂是可用于本发明的一类这样的材料，其包括例如4-甲氧基苯酚(MEHQ，对苯二酚的甲醚)、对苯二酚、2-甲基对苯二酚、2-叔丁基对苯二酚、叔丁基邻苯二酚、丁基化羟基甲苯和丁基化羟基苯甲醚等及其组合。可使用的其它抑制剂包括吩噻嗪和厌氧抑制剂如来自Albemarle Corporation，Baton Rouge，Louisiana的NPAL类型抑制剂(三-(N-亚硝基-N-苯基羟胺)铝盐)。可使用抑制剂的组合。
该PSA组合物还可包含一种或多种其它组分。一般，这些其它组分选自增粘剂、交联剂、稳定剂、填料、溶剂、增塑剂等。可使用这些材料的组合。这些其它组分的量和类型可随PSA的目标应用而变。例如，用于低表面能基材的PSA组合物将通常包含用于剥离性能的增粘剂。对于高剪切应用，交联剂可能是重要的。对于粘合剂可能经受温度极限的应用，可将稳定剂用于该配方。
如果低表面能粘附是PSA想要的性能，使用增粘剂是优选的。特别有效且和丙烯酸酯聚合物相容的是松香酯，优选氢化松香酯。对于高温应用，丙三醇三松香酸酯(可从Pinova Inc.，Brunswick，Georgia，USA获得的FORAL
Figure BDA0000112398540000061
85)和季戊四醇四松香酸酯(可从Pinova Inc.获得的FORAL105)及其混合物是优选的。可使用的其它增粘剂包括C5和C9烃增粘剂，对于丙烯酸类相容性，其量通常最多约5％。增粘剂的总量可为约10％-约30％，更一般为约15％-约25％。
可用于本发明的通常提高在UV固化的粘合剂中的交联密度的交联剂包括多官能丙烯酸酯。通过提高交联密度，将改善粘合剂的内聚性质，剪切性能也应提高。然而，交联剂的选择和用量需要仔细确定。采用错误类型或量的多官能丙烯酸酯，交联密度会比想要的高得多，剥离性能将大打折扣。由乙氧基化二醇或三醇制备的多官能丙烯酸酯是优选的交联剂，例如乙氧基化己二醇二丙烯酸酯、乙氧基化三羟甲基丙烷三丙烯酸酯等及其组合。乙氧基化丙烯酸酯通常比非乙氧基化的丙烯酸酯更具有反应活性，因为在挨着醚的碳上的氢原子已经发现是不稳定的且参与聚合过程。UV可固化PSA组合物可包含约1％-约5％，优选约2％-约3％的交联剂。
这里所述的UV可固化PSA可用于粘附基材。用于施加UV可固化PSA组合物的一般方法包括以下步骤：
a.提供均具有一个或多个表面的第一基材和第二基材；
b.提供这里所述的PSA；
c.将PSA施加到所述第一基材的表面上；
d.UV固化该PSA；和
e.将具有PSA的第一基材的表面与第二基材的表面接合以粘合第一基材和第二基材。
在实施方案中，可将PSA施加到第一基材和第二基材的表面上。此外，可将PSA涂覆在隔离衬垫上并固化，然后用作双面转移胶带。
与传统的PSA相比，本发明的PSA可以较大的厚度施加，仍然实现可接受的UV固化。通常可将PSA组合物以大于或等于约2mils，例如大于约3mils，例如约2mils-约5mils，一般约2.5mils-约5mils，包括约3mils-约5mils的厚度施加到基材上。典型的基材包括聚酯薄膜、聚丙烯、聚乙烯、高密度聚乙烯等。
实施例
薄膜制备和测试
用于测试的粘合剂薄膜通过使用标准拉伸设备，接着空气和烘箱烘干一段时间而将溶液形式的PSA施加到基材上来制备。或者，热熔薄膜采用加热的拉伸装置来制备。将薄膜以约1-约5mils的厚度涂覆到用于测试的聚对苯二甲酸乙二酯基材上。施加和干燥后，采用装有H-灯泡的FusionSystems 600瓦特装置对薄膜进行UV辐射。光照量通过改变传送带速度来调整。
用压敏胶带委员会(“PSTC”)试验方法来评价粘合剂性能，主要是用于剥离强度的PSTC试验方法#1以及用于剪切粘合破坏时间的PTSC试验方法#7。将PSTC试验方法#1和PTSC试验方法#7在本文全部援引加入。
实施例1
基础聚合物合成
制备具有以下组分的单体和链转移剂的混合物。
  607g   丙烯酸2-乙基己基酯
  189g   丙烯酸乙酯
  150g   丙烯酸甲酯
  25g   丙烯酸2-羟乙基酯
  25g   丙烯酸
  4g   1-十二烷硫醇
将单体和链转移剂的混合物放在具有进料泵的槽中。将355g的乙酸乙酯加入到2升水夹套反应器中。夹套温度设置在85℃，加热乙酸乙酯直到获得良好的回流。此外，使缓慢的氮气吹洗反应器的顶部空间。在反应过程中将反应器内容物以130-150rpm搅拌。分别制备4g二月桂酰基过氧化物和37g乙酸乙酯的溶液。在溶剂回流20分钟之后，分别将单体溶液和过氧化物溶液进料到反应器中。单体进料时间为90分钟以及过氧化物进料时间为120分钟。在进料结束后，将另外的42g乙酸乙酯用于清洗进料体系。在进料完成后，将反应混合物继续加热5小时。在这段时间之后，将反应混合物冷却至低于50℃，然后装瓶。最终的聚合物固含量理论上为69.8wt％。聚合物溶液的分析显示99.4％的单体转化率，通过凝胶渗透色谱法测定的聚合物数均分子量(Mn)为39,881g/mol以及重均分子量(Mw)为105,306g/mol。
衍生化试剂的制备
衍生化试剂的制备在500g烧瓶反应器中完成，将以下组分加入到反应器中。
Figure BDA0000112398540000091
将混合物在烧瓶中搅拌并加热到35℃。将58.0g(0.5mol)的丙烯酸2-羟乙基酯(HEA)在60分钟的时间内通过添加漏斗缓慢加入到反应混合物中以使得羟基选择性加成到IPDI的最有反应性的异氰酸酯基团上。将反应混合物持续搅拌30分钟，然后将温度缓慢升高到50℃，然后保持60分钟。通过NMR，确认2-HEA已经完全与IPDI反应。基于在122-124ppm处的残留NCO基团，C13 NMR有力地显示了一个异氰酸酯基团相对于另一个几乎完全消耗。
丙烯酸类聚合物的衍生化
为了说明衍生化的可行性，将如上所述制备的100g基础聚合物溶液加入8盎司罐中。另外，将0.04g DBTDL和0.01g BHT加入到该溶液中并彻底混合。然后，将如上制备的4.7g衍生化试剂溶液加入到基础聚合物(具有0.04g DBTDL和0.01g BHT)中，再次彻底混合。然后将衍生化试剂溶液和基础聚合物的混合物在75℃下加热30分钟。为了在反应之后稳定该混合物，加入0.01g MEHQ抑制剂。在异氰酸酯反应之前MEHQ不是有效的抑制剂，因为其容易与异氰酸酯反应并去活化。FT-IR证明异氰酸酯基团与聚合物中的羟基完全反应形成氨基甲酸酯官能团。
HEA/IPDI比例的影响
即使控制HEA加入到IDPI中优先与一个异氰酸酯基团反应，仍然存在未反应的IPDI、单氨基甲酸酯和二氨基甲酸酯的分布。自由IPDI能极大地影响聚合物的分子量分布，因为其能导致两个聚合物链的桥接。通过调节HEA对IPDI的比例，能最小化自由IPDI的量。由如上所述的基础聚合物和衍生化试剂溶液制备具有表1中所列的不同的HEA对IPDI的比例的一系列配方(1A-1F)(配方1A为基础聚合物，没有衍生化试剂)。衍生化的水平对每个配方保持相同。自由IPDI对分子量分布的影响显示在表1所列的结果中。
表1
  配方   HEA/IPDI比例   Mn   Mw
  1A-基础聚合物   ----   39,881   105,306
  1B   1.00   38,887   340,026
  1C   1.05   40,534   163,121
  1D   1.10   40,208   134,846
  1E   1.20   38,622   112,917
  1F   1.50   37,919   102,076
粘合剂性能
将如上所述的基础聚合物采用具有1.12∶1的HEA/IPDI比例的衍生化试剂以3.3％反应性衍生化试剂(基于固体)衍生化，以及在如上所述的相当条件下反应。衍生化树脂用1.5％Lamberti ESACURE KIP150光引发剂配制。在聚对苯二甲酸乙二酯上制备2-mil的干燥涂层，并在具有H-灯泡的FUSION UV SYSTEMS，INC.
Figure BDA0000112398540000101
(“Fusion Systems”)600瓦特装置上以125ft/min进行UV固化。由“light bug”测量的UV剂量为139mJ/cm2UV-A，95mJ/cm2UV-B和17mJ/cm2UV-C。粘合剂性能如下评价：在SS(24小时停留)上测量180剥离强度，其结果3.6lb/in的粘合破坏，也测量剪切破坏时间(1″x1″x 2kg)，其结果为大于300小时而没有滑动。该数据显示与许多商品化PSA相近或更好的性能。已经表明UV固化经常产生显著好于一般的商品化PSA产品的剪切性能。
实施例2
实施例1所述的基础聚合物用具有1.12∶1的HEA/IPDI比例的4.4％反应性衍生化试剂衍生化。然后将衍生化基础聚合物如下所示基于固体进行配制：
粘合剂薄膜由该配方以1.3mils厚度制备，以125ft/min在装有H-灯泡的Fusion Systems 600瓦特装置上固化。粘合剂性能通过180°剥离、RT剪切粘合破坏时间，160℉剪切粘合破坏时间和200℉剪切粘合破坏时间来衡量。在SS(24小时停留)上的180°剥离产生4.6lb/in的粘合破坏以及在HDPE(24小时停留)上的180°剥离产生2.0lb/in的粘合破坏。RT剪切粘合破坏时间(1″x 1″x 1kg)为大于2星期没有破坏，RT剪切粘合破坏时间(1″x 1″x 5lbs)为大于2星期没有破坏以及RT剪切粘合破坏时间(1″x 1″x 10lbs)是8.3小时有粘合破坏。160℉剪切粘合破坏时间(1″x 1″x 1kg)大于2星期没有破坏以及200℉剪切粘合破坏时间(1″x 1″x 1kg)大于2星期没有破坏。
数据说明除优异的剥离和室温剪切外，UV固化产品具有优异的高温剪切性能。加入增粘剂，该产品还具有对低表面能基材优异的粘附性。

Claims (30)

1.一种制备紫外(“UV”)可固化压敏粘合剂组合物的方法，其包括用由羟基官能丙烯酸酯单体和二异氰酸酯制备的衍生化试剂对丙烯酸类聚合物进行衍生化的步骤，其中所述衍生化试剂的羟基官能丙烯酸酯单体对二异氰酸酯的比例为大于约1∶1。
2.权利要求1的方法，其中所述比例为约1.05∶1-约1.5∶1。
3.权利要求1的方法，其中所述比例为约1.1∶1-约1.2∶1。
4.权利要求1的方法，其中所述丙烯酸类聚合物的分子量为约40,000-约100,000。
5.权利要求1的方法，其中所述丙烯酸类聚合物包含选自丙烯酸2-乙基己酯、丙烯酸异辛基酯、丙烯酸异癸基酯、丙烯酸月桂酯、丙烯酸正丁酯及其组合的单体。
6.权利要求1的方法，其中所述丙烯酸类聚合物包含选自丙烯酸甲酯、丙烯酸乙酯、甲基丙烯酸甲酯、苯乙烯、乙酸乙烯酯及其组合的单体。
7.权利要求1的方法，其中所述丙烯酸类聚合物包含至少一种骨架羟基官能单体。
8.权利要求7的方法，其中所述骨架羟基官能单体选自丙烯酸2-羟乙基酯、甲基丙烯酸2-羟乙基酯、丙烯酸2-羟丙基酯、甲基丙烯酸2-羟丙基酯、丙烯酸4-羟丁基酯及其组合。
9.权利要求1的方法，其中所述丙烯酸类聚合物包含选自丙烯酸、甲基丙烯酸、马来酸酐、甲基丙烯酸缩水甘油酯、N-乙烯基吡咯烷酮、N-乙烯基己内酰胺、丙烯酰胺及其组合的官能单体。
10.权利要求1的方法，其中所述二异氰酸酯选自异佛尔酮二异氰酸酯、甲苯二异氰酸酯及其组合。
11.权利要求1的方法，其中所述羟基官能丙烯酸酯单体选自丙烯酸2-羟乙基酯、丙烯酸2-羟丙基酯、丙烯酸4-羟丁基酯、甲基丙烯酸2-羟乙基酯、甲基丙烯酸2-羟丙基酯、己内酯丙烯酸酯、羟基丙烯酸酯及其组合。
12.权利要求1的方法，其中所述衍生化试剂的量为约2重量％-约9重量％固体。
13.由权利要求1的方法制备的UV可固化压敏粘合剂组合物。
14.一种紫外(“UV”)可固化压敏粘合剂组合物，其包含光引发剂和与衍生化试剂反应的丙烯酸类聚合物，所述衍生化试剂由羟基官能丙烯酸酯单体和二异氰酸酯制备，其中所述衍生化试剂的羟基官能丙烯酸酯单体对二异氰酸酯的比例为大于约1∶1。
15.权利要求14的UV可固化压敏粘合剂组合物，其包含选自抑制剂、增粘剂、交联剂、稳定剂、填料、溶剂、增塑剂及其组合的组分。
16.权利要求14的UV可固化压敏粘合剂组合物，其中所述比例为约1.05∶1-约1.5∶1。
17.权利要求14的UV可固化压敏粘合剂组合物，其中所述比例为约1.1∶1-约1.2∶1。
18.权利要求14的UV可固化压敏粘合剂组合物，其中所述丙烯酸类聚合物的分子量为约40,000-约100,000。
19.权利要求14的UV可固化压敏粘合剂组合物，其中所述丙烯酸类聚合物包含选自丙烯酸2-乙基己酯、丙烯酸异辛基酯、丙烯酸异癸基酯、丙烯酸月桂酯、丙烯酸正丁酯及其组合的单体。
20.权利要求14的UV可固化压敏粘合剂组合物，其中所述丙烯酸类聚合物包含选自丙烯酸甲酯、丙烯酸乙酯、甲基丙烯酸甲酯、苯乙烯、乙酸乙烯酯及其组合的单体。
21.权利要求14的UV可固化压敏粘合剂组合物，其中所述丙烯酸类聚合物包含至少一种骨架羟基官能单体。
22.权利要求21的UV可固化压敏粘合剂组合物，其中所述骨架羟基官能单体选自丙烯酸2-羟乙基酯、甲基丙烯酸2-羟乙基酯、丙烯酸2-羟丙基酯、甲基丙烯酸2-羟丙基酯、丙烯酸4-羟丁基酯及其组合。
23.权利要求14的UV可固化压敏粘合剂组合物，其中所述丙烯酸类聚合物包含选自丙烯酸、甲基丙烯酸、马来酸酐、甲基丙烯酸缩水甘油酯、N-乙烯基吡咯烷酮、N-乙烯基己内酰胺、丙烯酰胺及其组合的官能单体。
24.权利要求14的UV可固化压敏粘合剂组合物，其中所述二异氰酸酯选自异佛尔酮二异氰酸酯、甲苯二异氰酸酯及其组合。
25.权利要求14的UV可固化压敏粘合剂组合物，其中所述羟基官能丙烯酸酯单体选自丙烯酸2-羟乙基酯、丙烯酸2-羟丙基酯、丙烯酸4-羟丁基酯、甲基丙烯酸2-羟乙基酯、甲基丙烯酸2-羟丙基酯、己内酯丙烯酸酯、羟基丙烯酸酯及其组合。
26.权利要求14的UV可固化压敏粘合剂组合物，其中所述衍生化试剂的量为约2重量％-约9重量％固体。
27.一种用于将权利要求14的UV可固化压敏粘合剂施加到一种或多种基材上的方法，其包括以下步骤：
a.至少提供均具有一个或多个表面的第一基材和第二基材；
b.提供所述压敏粘合剂；
c.将所述压敏粘合剂施加到所述第一基材的表面上；
d.UV固化该压敏粘合剂；和
e.将具有压敏粘合剂的第一基材的表面与第二基材的表面接合以粘合第一基材和第二基材。
28.权利要求27的方法，其中将所述压敏粘合剂以大于或等于约2mils的厚度施加。
29.通过权利要求27的方法粘合在一起的两个或多个基材。
30.包含隔离衬垫的双面转移胶带，其中所述隔离衬垫涂覆有包含固化的权利要求14的压敏粘合剂组合物的材料。
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