CN112080232A - 一种耐水丙烯酸压敏胶 - Google Patents
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Abstract
本发明提供一种耐水丙烯酸压敏胶，由以下重量份数的原料制备而成：丙烯酸异辛酯120‑130份、丙烯酸丁酯80‑120份、甲基丙烯酸甲酯50‑70份、苯乙烯60‑80份、乳化剂8‑10份、引发剂2‑4份、交联剂4‑6份、链转移剂0.6‑0.8份、氨水20‑30份。本发明提出一种耐水丙烯酸压敏，在提高耐水白化性能的同时也要保证其它性能方面的优势。
Description
技术领域
本发明涉及压敏胶技术领域，具体涉及一种耐水丙烯酸压敏胶。
背景技术
丙烯酸乳液压敏胶是丙烯酸(酯)的共聚物，是由丙烯酸酯类和甲基丙烯酸酯类共聚，或加入醋酸乙烯酯等其它单体共聚而成的一种水性胶粘剂。丙烯酸乳液型压敏胶经过近二、三十年的迅速发展，已被广泛用于包装、标签、医用品等领域。丙烯酸压敏胶具有成本低、安全、环保、抗老化等优势成为压敏胶发展的重要方向之一，通过对其进行改性，丙烯酸乳液压敏胶的性能更加提高，应用领域更加广泛。
虽然丙烯酸压敏胶得到了越来越广泛的应用，但是丙烯酸压敏胶的耐水性较差的缺点限制了它在一些行业及产品上的应用。研发一种耐水白化性能良好的耐水丙烯酸压敏胶是非常有意义的。
发明内容
针对现有技术的不足，本发明提出一种耐水丙烯酸压敏，在提高耐水白化性能的同时也要保证其它性能方面的优势。
本发明的技术方案是这样实现的：
一种耐水丙烯酸压敏胶及其制备方法，由以下重量份数的原料制备而成：丙烯酸异辛酯120-130份、丙烯酸丁酯80-120份、甲基丙烯酸甲酯50-70份、苯乙烯60-80份、乳化剂8-10份、引发剂2-4份、交联剂4-6份、链转移剂0.6-0.8份、氨水20-30份。
优选地，由以下重量份数的原料制备而成：丙烯酸异辛酯125份、丙烯酸丁酯100份、甲基丙烯酸甲酯60份、苯乙烯70份、乳化剂9份、引发剂3份、交联剂5份、链转移剂0.7份、氨水25份。
优选地，所述引发剂为氧化还原引发剂。
优选地，所述氧化还原引发剂为氧化剂A-还原剂B，所述氧化剂A为过氧化氢，所述还原剂B有亚硫酸钠。
优选地，所述氧化剂A与所述还原剂B的摩尔比为1:1。
优选地，所述链转移剂为正十二硫醇。
优选地，所述耐水丙烯酸压敏胶的乳液为粒径50-60nm。
优选地，所述耐水丙烯酸压敏胶的乳液为粒径55nm。
优选地，所述乳化剂为烯烃氧基磺酸盐。
优选地，所述交联剂为丙烯酸、甲基丙烯酸、甲基丙烯酸缩水甘油酯。
本发明具有以下有益效果：本发明耐水丙烯酸压敏胶采用氧化剂-还原剂作为引发体系，使用烯烃氧基磺酸盐以减少乳化剂在乳液干燥时的迁移，减小或消除了乳液中水溶性电解质的存在，可以提高乳液的耐水白化性能，本发明制备的丙烯酸压敏胶初粘性好、持粘性好剥离强度高，储存期长、耐90℃水30-40min，具有良好的耐水白化性能。
具体实施方式
为了对本发明的技术特征、目的和有益效果有更加清楚的理解，现结合具体实施例对本发明的技术方案进行以下详细说明，应理解这些实例仅用于说明本发明而不用于限制本发明的范围。
实施例1
一种耐水丙烯酸压敏胶，由以下重量份数的原料制备而成：丙烯酸异辛酯130份、丙烯酸丁酯80份、甲基丙烯酸甲酯50份、苯乙烯80份、乳化剂烯烃氧基磺酸盐8份、引发剂2份、丙烯酸1份、甲基丙烯酸1份、甲基丙烯酸缩水甘油酯2份、链转移剂正十二硫醇0.6份、氨水20份，所述耐水丙烯酸压敏胶的乳液为粒径50nm，所述引发剂为氧化还原引发剂，所述氧化还原引发剂为氧化剂A-还原剂B，所述氧化剂A为过氧化氢，所述还原剂B有亚硫酸钠，所述氧化剂A与所述还原剂B的摩尔比为1:1。
一种耐水丙烯酸压敏胶的制备方法，步骤如下：
(1)按重量份数称取丙烯酸异辛酯、丙烯酸丁酯、甲基丙烯酸甲酯、苯乙烯、丙烯酸、甲基丙烯酸，将以上原料放入反应器中混合均匀备用；
(2)按重量份数称取烯烃氧基磺酸盐加入反应器中再加入适量去离子水开启搅拌功能，搅拌速度200-300r/min，在20-30min内匀速滴加步骤(1)的混合溶液，滴加完毕后，继续搅拌10-20min后，得到预乳液备用；
(3)先将步骤(2)制备的部分预乳液放入反应釜中，再加入烯烃氧基磺酸盐、甲基丙烯酸缩水甘油酯和去离子水，开始搅拌，搅拌速度在250-270r/min，加热升温至50-60℃时加入部分引发剂，当乳液显蓝色时；继续升温至60-70℃左右，保温20-40min，再分别滴加剩余预乳液和引发剂，剩余预乳液在3h内滴完，剩余引发剂在4h内滴完，加入氨水调节PH值为7-8，滴加完毕后保温1h降至室温，过滤出料，即得成品。
实施例2
一种耐水丙烯酸压敏胶，由以下重量份数的原料制备而成：丙烯酸异辛酯120份、丙烯酸丁酯120份、甲基丙烯酸甲酯70份、苯乙烯60份、乳化剂烯烃氧基磺酸盐10份、引发剂4份、丙烯酸3份、甲基丙烯酸2份、甲基丙烯酸缩水甘油酯1份、链转移剂正十二硫醇0.8份、氨水30份，所述耐水丙烯酸压敏胶的乳液为粒径60nm，所述引发剂为氧化还原引发剂，所述氧化还原引发剂为氧化剂A-还原剂B，所述氧化剂A为过氧化氢，所述还原剂B有亚硫酸钠。所述氧化剂A与所述还原剂B的摩尔比为1:1。
一种耐水丙烯酸压敏胶的制备方法，步骤如下：
(1)按重量份数称取丙烯酸异辛酯、丙烯酸丁酯、甲基丙烯酸甲酯、苯乙烯、丙烯酸、甲基丙烯酸，将以上原料放入反应器中混合均匀备用；
(2)按重量份数称取烯烃氧基磺酸盐加入反应器中再加入适量去离子水开启搅拌功能，搅拌速度200-300r/min，在20-30min内匀速滴加步骤(1)的混合溶液，滴加完毕后，继续搅拌10-20min后，得到预乳液备用；
(3)先将步骤(2)制备的部分预乳液放入反应釜中，再加入烯烃氧基磺酸盐、甲基丙烯酸缩水甘油酯和去离子水，开始搅拌，搅拌速度在250-270r/min，加热升温至50-60℃时加入部分引发剂，当乳液显蓝色时；继续升温至60-70℃左右，保温20-40min，再分别滴加剩余预乳液和引发剂，剩余预乳液在3h内滴完，剩余引发剂在4h内滴完，加入氨水调节PH值为7-8，滴加完毕后保温1h降至室温，过滤出料，即得成品。
实施例3
一种耐水丙烯酸压敏胶，由以下重量份数的原料制备而成：丙烯酸异辛酯125份、丙烯酸丁酯100份、甲基丙烯酸甲酯60份、苯乙烯70份、乳化剂烯烃氧基磺酸盐9份、引发剂3份、丙烯酸1份、甲基丙烯酸1.5份、甲基丙烯酸缩水甘油酯2.5份、链转移剂0.7份、氨水25份，所述耐水丙烯酸压敏胶的乳液为粒径55nm，所述引发剂为氧化还原引发剂，所述氧化还原引发剂为氧化剂A-还原剂B，所述氧化剂A为过氧化氢，所述还原剂B有亚硫酸钠。所述氧化剂A与所述还原剂B的摩尔比为1:1。
一种耐水丙烯酸压敏胶的制备方法，步骤如下：
(1)按重量份数称取丙烯酸异辛酯、丙烯酸丁酯、甲基丙烯酸甲酯、苯乙烯、丙烯酸、甲基丙烯酸，将以上原料放入反应器中混合均匀备用；
(2)按重量份数称取烯烃氧基磺酸盐加入反应器中再加入适量去离子水开启搅拌功能，搅拌速度200-300r/min，在20-30min内匀速滴加步骤(1)的混合溶液，滴加完毕后，继续搅拌10-20min后，得到预乳液备用；
(3)先将步骤(2)制备的部分预乳液放入反应釜中，再加入烯烃氧基磺酸盐、甲基丙烯酸缩水甘油酯和去离子水，开始搅拌，搅拌速度在250-270r/min，加热升温至50-60℃时加入部分引发剂，当乳液显蓝色时；继续升温至60-70℃左右，保温20-40min，再分别滴加剩余预乳液和引发剂，剩余预乳液在3h内滴完，剩余引发剂在4h内滴完，加入氨水调节PH值为7-8，滴加完毕后保温1h降至室温，过滤出料，即得成品。
一、性能测试
本发明耐水丙烯酸压敏胶的初粘力测定：按GB4852-1984测定；持粘力测定：按GB4851-1998测定；180°剥离强度测定：按GB4851-1998测定：90℃耐水方法：将制好的耐水丙烯酸压敏胶带涂胶一面向下放入90℃热水中，计量从泡水开始到胶带变白的时间。粒径的测定：使用弗尔德(上海)仪器设备有限公司的M1型仪器分析粒度测量粒度分布。结果如表1所示。
表1
| 项目 | 实施例1 | 实施例2 | 实施例3 |
| 初粘力测定(号) | 6 | 6 | 6 |
| 持粘力测定(h) | 68 | 68 | 68 |
| 180°剥离强度测定(N/25mm) | 10 | 8 | 9 |
| 90℃耐水时间(min) | 45 | 38 | 40 |
| 粒径的测定(nm) | 55 | 57 | 59 |
由表1可知，本发明实施例1-3制备的耐水丙烯酸压敏胶具有良好的耐水白化性能，同时也拥有较好的综合性能。
以上实施例对本发明的产品及方法进行了详细介绍，本文中应用了具体例对本发明的主要步骤及实施方式进行了阐述，上述实施例只是帮助理解本发明的方法及核心原理。对于本领域的技术人员，依据本发明的核心原理，在具体实施中会对各条件和参数根据需要而变动，综上所述，本说明书不应理解为对本发明的限制。
Claims (10)
1.一种耐水丙烯酸压敏胶，其特征在于：由以下重量份数的原料制备而成：丙烯酸异辛酯120-130份、丙烯酸丁酯80-120份、甲基丙烯酸甲酯50-70份、苯乙烯60-80份、乳化剂8-10份、引发剂2-4份、交联剂4-6份、链转移剂0.6-0.8份、氨水20-30份。
2.根据权利要求1所述的耐水丙烯酸压敏胶，其特征在于：由以下重量份数的原料制备而成：丙烯酸异辛酯125份、丙烯酸丁酯100份、甲基丙烯酸甲酯60份、苯乙烯70份、乳化剂9份、引发剂3份、交联剂5份、链转移剂0.7份、氨水25份。
3.根据权利要求1所述的耐水丙烯酸压敏胶，其特征在于：所述引发剂为氧化还原引发剂。
4.根据权利要求3所述的耐水丙烯酸压敏胶，其特征在于：所述氧化还原引发剂为氧化剂A-还原剂B，所述氧化剂A为过氧化氢，所述还原剂B有亚硫酸钠。
5.根据权利要求3所述的耐水丙烯酸压敏胶，其特征在于：所述氧化剂A与所述还原剂B的摩尔比为1:1。
6.根据权利要求1所述的耐水丙烯酸压敏胶，其特征在于：所述链转移剂为正十二硫醇。
7.根据权利要求1所述的耐水丙烯酸压敏胶，其特征在于：所述耐水丙烯酸压敏胶的乳液为粒径50-60nm。
8.根据权利要求1所述的耐水丙烯酸压敏胶，其特征在于：所述耐水丙烯酸压敏胶的乳液为粒径55nm。
9.根据权利要求1所述的耐水丙烯酸压敏胶，其特征在于：所述乳化剂为烯烃氧基磺酸盐。
10.根据权利要求1所述的耐水丙烯酸压敏胶，其特征在于：所述交联剂为丙烯酸、甲基丙烯酸、甲基丙烯酸缩水甘油酯。
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