CN104837948B - 热活化的压敏粘着剂 - Google Patents
热活化的压敏粘着剂 Download PDFInfo
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- CN104837948B CN104837948B CN201380063515.XA CN201380063515A CN104837948B CN 104837948 B CN104837948 B CN 104837948B CN 201380063515 A CN201380063515 A CN 201380063515A CN 104837948 B CN104837948 B CN 104837948B
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Abstract
本发明涉及一种组合物,其具有三种组分。第一组分是具有10—30重量%苯乙烯聚合单元的20到80重量%苯乙烯一二烯嵌段共聚物,其中所述嵌段共聚物以共聚物于水中的分散液形式存在,且所述分散液含有以总分散液重量计小于5重量%有机溶剂。第二组分是0.5到20重量%增塑剂。第三组分是20到80重量%增粘剂。
Description
本发明涉及一种适用于制造不具有衬垫的标记的热活化的压敏粘着剂。
含有粘着剂聚合物、增塑剂和增粘剂的热活化的压敏粘着剂已经描述。举例来说,美国公开案第2011/0293834号公开一种含有丙烯酸聚合物和邻苯二甲酸二环己酯作为增塑剂的粘着剂。然而,现有技术并未公开既具有良好粘着剂特性又具有良好封闭特性的热活化的压敏粘着剂。
由本发明解决的问题是提供一种既具有良好粘着剂特性又具有良好封闭特性的热活化的压敏粘着剂。
发明内容
本发明提供一种组合物,其包含:(a)具有10-30重量%苯乙烯聚合单元的20到80干重%苯乙烯-二烯嵌段共聚物,其中所述嵌段共聚物以分散液形式存在于水中,且所述分散液含有以总分散液重量计小于5重量%有机溶剂;(b)0.5到20干重%增塑剂;和(c)20到80干重%增粘剂。
本发明进一步提供一种制备热活化的压敏粘着剂的方法;所述方法包含将以下各者合并:(a)具有10-30重量%苯乙烯聚合单元的20到80干重%苯乙烯-二烯嵌段共聚物,其中所述嵌段共聚物以分散液形式存在于水中,且所述分散液含有以总分散液重量计小于5重量%有机溶剂;(b)0.5到20干重%增塑剂;和(c)20到80干重%增粘剂;从而制造粘着剂组合物;以及将所述粘着剂组合物涂布在纸或塑料膜上,所述纸或塑料膜具有12到130微米的厚度。
具体实施方式
除非另外规定,否则百分比是重量百分比(重量%)且温度以℃为单位。提及室温或环境温度指示20-25℃的温度。单体残基的重量百分比是以聚合物中单体残基的总重量计。指定组合物中的共聚物、增塑剂、增粘剂和任何其它组分的重量百分比是否以干(干重%)或湿(湿重%)计。所有聚合物Tg和Tm值均通过差示扫描量热法(DSC)根据ASTM D3418测定。
苯乙烯-二烯嵌段共聚物是苯乙烯和脂肪族二烯的任何嵌段共聚物。优选地,二烯是C2-C8二烯,优选地是C2-C6二烯。优选的苯乙烯-二烯嵌段共聚物是苯乙烯-异戊二烯-苯乙烯(SIS)、苯乙烯-乙烯-丁二烯-苯乙烯(SEBS)、苯乙烯-丁二烯-苯乙烯(SBS)、苯乙烯-乙烯-丙烯-苯乙烯(SEPS)、烯烃嵌段共聚物(OBC);优选地是SIS。优选地,苯乙烯-二烯嵌段共聚物包含12-25重量%、优选地15-20重量%苯乙烯聚合单元。优选地,苯乙烯-二烯嵌段共聚物的熔融指数(MI,根据ISO 1133测量)为1-100g/10min,优选地为5-70,优选地为10-50。优选地,苯乙烯-二烯嵌段共聚物具有10-70重量%二嵌段含量和30-90重量%三嵌段含量,优选地15-60重量%二嵌段含量和40-85重量%三嵌段含量。任选地,可以使用不同苯乙烯-二烯嵌段共聚物的掺合物。
优选地,苯乙烯-二烯嵌段共聚物的水性分散液含有分散剂。在一个优选实施例中,分散剂是C18-C32脂肪族羧酸,优选地是C18-C28脂肪族羧酸,优选地是C20-C26脂肪族羧酸。在本发明的一个优选实施例中,分散剂是烯烃-丙烯酸共聚物,优选地是具有10重量%到30重量%、优选地15重量%到25重量%丙烯酸的烯烃-丙烯酸共聚物。在本发明的优选实施例中,也可使用其它物质作为分散剂,如部分水解的聚乙烯醇、苯乙烯马来酸酐共聚物、马来酸酐改性的聚乙烯、聚丙烯、或聚烯烃共聚物、马来酸酐改性的苯乙烯-二烯嵌段共聚物或其混合物。任选地,常规阳离子、离子或非离子表面活性剂可以与上述聚合分散剂组合使用。优选地,水性分散液包含25干重%到50干重%、优选地25干重%到45干重%、优选地30干重%到45干重%苯乙烯-二烯嵌段共聚物。当分散剂是C18-C32脂肪族羧酸时,优选地其以按苯乙烯-二烯嵌段共聚物的重量计2干重%到10干重%、优选地2干重%到8干重%、优选地3干重%到7干重%的量存在。当分散剂是烯烃-丙烯酸共聚物时,优选地其以按苯乙烯-二烯嵌段共聚物的重量计15干重%到35干重%、优选地20干重%到30干重%、优选地22干重%到28干重%的量存在。优选地,水性分散液含有以总分散液重量计小于5重量%、优选地小于4重量%、优选地小于3重量%、优选地小于2重量%、优选地小于1重量%、优选地小于0.5重量%有机溶剂。优选地,组合物具有以总组合物重量计小于4重量%、优选地小于3重量%、优选地小于2重量%、优选地小于1重量%、优选地小于0.5重量%、优选地小于0.3重量%有机溶剂。优选地,可以水性分散液形式(来自苯乙烯-二烯嵌段共聚物的制备)或以组合物形式在规定界限值内存在的溶剂是烃基溶剂,优选地是芳香族溶剂,优选地是甲苯。
优选地,组合物包含至少25干重%、优选地至少30干重%、优选地至少35干重%、优选地至少40干重%、优选地不超过75干重%、优选地不超过70干重%、优选地不超过65干重%、优选地不超过60干重%、优选地不超过55干重%苯乙烯-二烯嵌段共聚物。
优选地,组合物包含至少22干重%、优选地至少24干重%、优选地至少26干重%、优选地至少28干重%、优选地不超过75干重%、优选地不超过70干重%、优选地不超过60干重%、优选地不超过50干重%、优选地不超过45干重%增粘剂。
优选地,增粘剂包含松香酯树脂、非氢化脂肪族C5树脂、氢化脂肪族C5树脂、芳香族改性的C5树脂、萜类树脂、氢化C9树脂或其组合,其中“C5”和“C9”是指所用起始物质中碳原子的数量。优选地,增粘剂的软化点是65到180℃,优选地是90到140℃。优选地,增粘剂的密度是0.92g/cc到1.06g/cc且熔融粘度在175℃下小于1000帕斯卡秒(Pa·s)。优选地,增粘剂以水性分散液的形成存在。
优选地,组合物包含至少1干重%、优选地至少3干重%、优选地至少5干重%、优选地至少6干重%、优选地至少7干重%、优选地至少8干重%、优选地至少9干重%、优选地不超过18干重%、优选地不超过15干重%、优选地不超过12干重%、优选地不超过11干重%增塑剂。
优选地,增塑剂的熔点是50-150℃。优选地,增塑剂的熔点是至少55℃、优选地至少60℃、优选地至少62℃、优选地至少64℃、优选地至少66℃;优选地,熔点不超过130℃、优选地不超过120℃、优选地不超过110℃、优选地不超过100℃、优选地不超过90℃、优选地不超过80℃。在本发明的一个优选实施例中,增塑剂是软化点为50-150℃的非晶形物质。优选地,增塑剂的软化点是至少55℃、优选地至少60℃、优选地至少62℃、优选地至少64℃、优选地至少66℃;优选地,软化点不超过130℃、优选地不超过120℃、优选地不超过110℃、优选地不超过100℃、优选地不超过90℃、优选地不超过80℃。
优选地,基于增塑剂和SIS共聚物的苯乙烯畴(即,聚苯乙烯)的霍伊溶解度参数(Hoy solubility parameter)是至少1.5(MJ/m3)1/2、优选是至少2(MJ/m3)1/2、优选是至少2.5(MJ/m3)1/2、优选是至少3(MJ/m3)1/2、优选是至少3.25(MJ/m3)1/2;优选地,Δδ参数不超过30(MJ/m3)1/2、优选地不超过25(MJ/m3)1/2、优选地不超过20(MJ/m3)1/2、优选地不超过18(MJ/m3)1/2。
霍伊溶解度参数用于评估每一潜在增塑剂在聚合物的聚苯乙烯畴中的掺混性。霍伊使用的公式的全面描述以及官能团对摩尔官能的贡献可见于D.W.凡·克里弗伦(D.W.van Krevelen)的《聚合物特性-其与化学结构的相关性;其来自添加剂基团贡献的数字估计和预测》(Properties of Polymers-Their Correlation with ChemicalStructure;Their Numerical Estimation and Prediction from Additive GroupContributions)。为了评估各种潜在增塑剂与聚合物的聚苯乙烯畴的掺混性,使用总溶解度参数(δt)以及其分量(δd、δp、δh、δv)。使用以下公式计算每一潜在增塑剂的溶解度参数分量且将其与聚苯乙烯的溶解度参数分量相比:
Δδ=[(Δδh)2+(Δδv 2)]1/2
其中Δδh是聚苯乙烯与测试物质之间δh的差值,且Δδv是聚苯乙烯与测试物质之间δv的差值。δv是组合溶解度参数的极性和分散性两个分量的分量。Δδ因此是δh对δv的二维曲线图上两个点(两种物质)之间距离的数字表示。两个点越接近,Δδ的值越小,预测物质的掺混性将越大。
优选地,增塑剂是苯甲基-2-萘基醚、三苯甲酸甘油酯、乙酸对甲苯基苯酯、苯亚甲基苯酞、乙酸视黄酯、二硫化四乙基秋兰姆、乙酸异丁子香酯、乙酸香兰素酯、乙基香兰素、葡萄糖五乙酸酯、1,4-环己烷二甲醇二苯甲酸酯、蔗糖苯甲酸酯、丙基-4-羟基苯甲酸酯、3,5-二-叔丁基-4-羟基苯甲醇、甲基-4-羟基苯甲酸酯、丁基-4-羟基苯甲酸酯、苯甲酸、苯乙酸、苯氧基乙酸、硬脂酸、聚乙烯亚胺、维生素A乙酸酯、蔗糖素、山嵛酸、月桂酰胺、硬脂酰胺、芥酸酰胺、双(2,2,6,6-四甲基-4-哌啶基)癸二酸酯、二十二醇、对苯二甲酸二甲酯、蔗糖八乙酸酯、甲基环戊烯醇酮、小烛树蜡(candelilla wax)、脱氢乙酸、棕榈酸抗坏血酸酯、琼脂琼脂、香兰素、4-(4-羟苯基)-2-丁酮、1,2-二苯氧基乙烷、乙二醇-间甲苯醚、乙烯双-硬脂酰胺、乙二酸二苯甲酯、二-(对氯苯甲基)乙二酸酯、二-(对甲基苯甲基)乙二酸酯、磺酸二苯酯、对苯甲基二苯基、2,6-二异丙基萘、2,6-二异丙基萘、对羟基苯甲酸苯甲酯、苯甲醚、1,2-双(羟甲基苯)的二苯醚、1,2-双(羟甲基苯)的二苯醚、4,4′-二异丙基联苯、间联三苯、邻氨基苯甲酸、苯甲酰胺、水杨酰胺、3-(二甲基氨基)苯甲酸、4-(辛氧基)苯甲酸、3-(氯甲基)苯甲酸、2-(氯甲基)苯甲酸、3-(甲基氨基)苯甲酸、3-(1-氰基乙基)苯甲酸、4-(叔丁氧基甲基)苯甲酸、4-(丁基氨基)苯甲酸、苯甲酸苯酯、苯甲酸胆固醇酯、苯甲酸4-甲基苯酯、苯甲酸4-氯苯酯、苯甲酸4-氯苯甲酯、甲基-4-(氰基甲基)苯甲酸酯、3-(4-羟苯基)苯甲酸甲酯、4-(溴甲基)苯甲酸甲酯、4-(二甲基氨基)苯甲酸乙酯、4-(4-甲酰基苯基)苯甲酸甲酯、4-(3-甲酰基苯基)苯甲酸甲酯、4-(丁基氨基)苯甲酸乙酯、3-甲氧基-2-(2-甲氧基-2-氧代乙氧基)苯甲酸甲酯、邻苯二甲酸二苯酯、邻苯二甲酸单甲酯、邻苯二甲酸单丁酯、邻苯二甲酸单苯甲酯;优选地是苯甲基-2-萘基醚(BON)、三苯甲酸甘油酯(GTB)、乙酸对甲苯基苯酯(p-TPA)、苯亚甲基苯酞、乙酸视黄酯、二硫化四乙基秋兰姆(TETS)、乙酸异丁子香酯、乙酸香兰素酯、乙基香兰素、葡萄糖五乙酸酯、1,4-环己烷二甲醇二苯甲酸酯(DCHP)、蔗糖苯甲酸酯(SB)、丙基-4-羟基苯甲酸酯、3,5-二-叔-4-羟基苯甲醇、甲基-4-羟基苯甲酸酯、丁基-4-羟基苯甲酸酯、苯甲酸、三羟甲基丙烷、二(三羟甲基丙烷)、苯乙酸或苯氧基乙酸;优选地是蔗糖苯甲酸酯或三苯甲酸甘油酯。
优选地,增塑剂的熔化热是1到200J/g,优选地是5到150J/g,优选地是5到90J/g。优选地,增塑剂使苯乙烯-二烯共聚物中的苯乙烯畴的Tg降低15到100℃、优选地20到80℃,如通过DSC测定。
优选地,使用设计为所属领域的技术人员熟知的叶片叶轮在分批法中在室温下将共聚物、增粘剂和增塑剂混合在一起。混合rpm通常被优化成大约维持在整个混合物中良好搅拌而不夹带空气的速率。粘着剂组合物可通过许多技术涂覆到网状物上,如绕线棒、逗点涂布机、凹版、滚涂机、载玻片、槽模、辊上刀或帘式涂布机。预期粘着剂组合物可能需要通过添加用于目标涂布方法的添加剂(如增稠剂、表面活性剂和消泡剂)来调节。
将粘着剂组合物涂布在包含纸(例如半光泽纸或热纸)或塑料膜(例如聚丙烯或聚酯)的衬底上。优选地,衬底的厚度为20到100微米,优选地为25到80微米,优选地为30到70微米。粘着剂组合物的涂层厚度优选地是5到80微米,优选地是7到70微米,优选地是9到65微米。将经涂布衬底干燥以移除水,优选地在烘箱中在低于150℃、优选地低于140℃、优选地低于130℃、优选地低于120℃、优选地低于110℃的温度下。将经涂布经干燥的衬底形成辊筒且不在粘着剂上置放衬垫。经干燥粘着剂层并不粘着于衬底,它们在经涂布经干燥的衬底形成辊筒时接触。优选地,衬底中与经涂布侧面相对的侧面接受使用适合墨水的印刷以形成标记。可将标记置于衬底上,且加热以活化粘着剂且连接标记。
实例
制备SIS水性分散液
分散液在25mm直径双螺杆挤压机上根据美国专利第7,947,776号(尤其参见实例6)中描述的方法制备。稳定剂通过定体积进料器递送,KRATON SIS基体聚合物通过失重进料器递送。稳定剂是PRIMACOR 5980(80/20,乙烯/丙烯酸聚合物;熔融指数300g/10min(ASTM D1238,190℃/2.16kg);可购自陶氏化学(Dow Chemical))或UNICID 350(C23-C26饱和脂肪族羧酸,可购自贝克休斯(Baker Hughes))。SIS聚合物是KRATON D1113(三嵌段共聚物,16%聚合苯乙烯单元,56%二嵌段)和KRATON D1161(线形嵌段共聚物,15%聚合苯乙烯单元,19%二嵌段)。在挤出机中熔融、混合且传送基体聚合物和稳定剂。将挤出机温度分布设定为跨分散液D的桶的190℃、跨分散液A和B的桶的120℃。对于分散液D,使用30重量%氢氧化钾(CAS第71769-53-4)号作为中和剂。对于分散液A和B,使用2-二甲基氨基乙醇(DMEA;100%)(CAS第108-01-0号)作为中和剂。挤出机速度是约450rpm。将中和剂和初始水混合在一起且在初始水引入点进料到挤出机。稀释水经由第二泵进料,且将其引入到挤出机的稀释区中。初始水和稀释水液流任选地经预热到挤出机温度。在挤出机出口,使用反压力调节剂来调节到挤出机桶内部的适合的压力以防止在操作温度下形成蒸汽。将所得分散液冷却且经由200微米过滤器过滤。分散液的特性展示在表1和表2中。
表1
表2
在所述实例中,将三组分分散液以所需比率以20克的总湿重称取到6英钱小瓶中。将小瓶加盖且用手振荡30秒以确保样品充分混合。接着使样品静置2小时,随后将其涂覆到衬底(2密耳未处理取向的聚丙烯或直接热敏纸)上。将样品混合物的1.6密耳湿涂层用BYK涂覆器棒涂覆到衬底上。接着在对流烘箱中在50℃下干燥经涂布样品10分钟,留下0.5-0.9密耳干膜。
干膜抵着用于保护的硅酮剥离纸置放,且接着在经控制温度(72°F)和湿度(50%RH)室中静置过夜以平衡。接着将膜切成1”×6”条带以用于粘着剂(剥离)和封闭测试。接着通过使用设定在110℃和15秒下的沃尔纳马西斯公司(Werner Mathis AG)烘箱加热来活化测试条带,且条带粘着剂侧面向上静置在网架上,其中方网眼是0.5cm。接着用2kg手推辊将条带立即层压到下文所述的测试衬底上。剥离力是从衬底移除涂布有粘着剂的膜所需的力的量度。在层压步骤后60分钟停留时间和24小时停留时间之后测量剥离力。具体地说,对于每一停留时间,使用测试方法PSTC 101测试方法A从不锈钢(SS)板和高密度聚乙烯(HDPE)板测量180°剥离力一次。封闭测试使用未活化测试条带,且使粘着剂面向固定于不锈钢板上的一片聚酯膜或直接热敏纸(图像层朝着粘着剂)。将这一结构在50℃烘箱中置放1周,且测试条带顶部上的重量为1kg,所得压力>=12克/平方厘米。在一周之后,将结构置放于经控制温度(72°F)和湿度(50%RH)室中过夜以平衡。接着在大多数情况下使测试条带经受上述180°剥离力测试两次,因为每一测试仅使用约2.5英寸所述结构。
实例中的所有调配物给予湿重分率。干膜固体可基于调配物中每一组分的给定固体计算。
粘着剂组合物的调配物
取向的聚丙烯
直接热敏纸
增粘剂-劳特(Lawter)Snowtack 100G(56%固体)
涂布在衬底上的粘着剂的测试结果
SIS分散液(A)、增粘剂(Snowtack 100G)和增塑剂(邻苯二甲酸二环己酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(A)、增粘剂(Snowtack 100G)和增塑剂(蔗糖苯甲酸酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(A)、增粘剂(Snowtack 100G)和增塑剂(三苯甲酸甘油酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(A)、增粘剂(Snowtack 100G)和增塑剂(苯甲基2-萘基醚)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(B)、增粘剂(Snowtack 100G)和增塑剂(邻苯二甲酸二环己酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(B)、增粘剂(Snowtack 100G)和增塑剂(蔗糖苯甲酸酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(B)、增粘剂(Snowtack 100G)和增塑剂(三苯甲酸甘油酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(B)、增粘剂(Snowtack 100G)和增塑剂(苯甲基2-萘基醚)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(D)、增粘剂(Snowtack 100G)和增塑剂(邻苯二甲酸二环己酯)
180°剥离(牛),用1kg向下加180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)重,封闭50℃持续1周(+24小时CTR)
SIS分散液(D)、增粘剂(Snowtack 100G)和增塑剂(蔗糖苯甲酸酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(D)、增粘剂(Snowtack 100G)和增塑剂(三苯甲酸甘油酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(D)、增粘剂(Snowtack 100G)和增塑剂(苯甲基2-萘基醚)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
直接热敏纸
180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)180°剥离(牛),用1kg向下加重,封闭50℃持续1周(+24小时CTR)
较高增塑剂水平的研究
SIS分散液(D)、增粘剂(Snowtack 100G)和增塑剂(邻苯二甲酸二环己酯)
180°剥离(牛),用1kg向下180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)加重,封闭50℃持续1周(+24小时CTR)
SIS分散液(D)、增粘剂(Snowtack 100G)和增塑剂(蔗糖苯甲酸酯)
180°剥离(牛),用1kg向下加180°剥离,不锈钢(牛/英寸)180°剥离,HDPE(牛/英寸)重,封闭50℃持续1周(+24小时CTR)
增塑剂的特征
Claims (10)
1.一种组合物,其包含:(a)具有10-30重量%苯乙烯聚合单元的20到80干重%苯乙烯-二烯嵌段共聚物,其中所述嵌段共聚物以共聚物于水中的分散液形式存在,且所述分散液含有以总分散液重量计小于5重量%有机溶剂,所述共聚物于水的分散液包含分散剂C18-C32脂肪族羧酸;(b)0.5到20干重%增塑剂;和(c)28到80干重%增粘剂,其中所述组合物中各组分的含量百分比的总和等于100%。
2.根据权利要求1所述的组合物,其中所述增塑剂和所述苯乙烯-二烯嵌段共聚物中的苯乙烯聚合单元的霍伊溶解度参数(Hoy solubility parameter)是2.5到30(MJ/m3)1/2。
3.根据权利要求2所述的组合物,其中所述增粘剂包含松香酯树脂、非氢化脂肪族C5树脂、氢化脂肪族C5树脂、芳香族改性的C5树脂、萜类树脂、氢化C9树脂或其组合。
4.根据权利要求3所述的组合物,其中所述苯乙烯-二烯嵌段共聚物具有10-70重量%二嵌段含量和30-90重量%三嵌段含量。
5.根据权利要求4所述的组合物,其中所述增粘剂的软化点是65到180℃。
6.根据权利要求5所述的组合物,其中所述组合物包含:(a)25到65干重%的所述共聚物;(b)4到15干重%的所述增塑剂;以及(c)28到70干重%的所述增粘剂。
7.根据权利要求6所述的组合物,其中所述增塑剂是非晶形且软化点为50-150℃。
8.一种制备热活化的压敏粘着剂的方法;所述方法包含将以下各者合并:(a)具有10-30重量%苯乙烯聚合单元的20到80干重%苯乙烯-二烯嵌段共聚物,其中所述嵌段共聚物以分散液形式存在于水中,且所述分散液含有以总分散液重量计小于5重量%有机溶剂,所述共聚物于水的分散液包含分散剂C18-C32脂肪族羧酸;(b)0.5到20干重%增塑剂;和(c)28到80干重%增粘剂,其中所述组合物中各组分的含量百分比的总和等于100%;从而制造粘着剂组合物;以及将所述粘着剂组合物涂布在纸或塑料膜上,所述纸或塑料膜具有12到130微米的厚度。
9.根据权利要求8所述的方法,其中所述增塑剂和所述苯乙烯-二烯嵌段共聚物中的苯乙烯聚合单元的霍伊溶解度参数是2.5到30(MJ/m3)1/2。
10.根据权利要求9所述的方法,其中所述粘着剂组合物通过将以下各者合并来制备:(a)25到65干重%的所述共聚物;(b)4到15干重%的所述增塑剂;以及(c)28到70干重%的所述增粘剂。
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TW201428047A (zh) | 2014-07-16 |
BR112015012603A2 (pt) | 2017-08-22 |
JP2015537108A (ja) | 2015-12-24 |
BR112015012603A8 (pt) | 2019-10-08 |
WO2014093043A1 (en) | 2014-06-19 |
JP6318168B2 (ja) | 2018-04-25 |
CN104837948A (zh) | 2015-08-12 |
RU2661568C2 (ru) | 2018-07-17 |
EP2909279B1 (en) | 2017-02-01 |
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