李小兰，曾幸荣，李红强，陈平绪

（华南理工大学 材料科学与工程学院，广东 广州 510640）

氢化丙烯酸松香/丙烯酸酯复合乳液的制备及其压敏胶的性能

李小兰，曾幸荣*，李红强，陈平绪

（华南理工大学 材料科学与工程学院，广东 广州 510640）

以氢化丙烯酸松香为增黏树脂，将其溶解在丙烯酸酯单体中，预乳化后采用半连续乳液聚合工艺制备了氢化丙烯酸松香/丙烯酸酯复合乳液。研究了氢化丙烯酸松香的用量对单体转化率、凝胶率、溶胶相对分子质量及其分布、乳胶膜的玻璃化温度（Tg）和压敏胶粘接性能等的影响。结果表明，氢化丙烯酸松香对单体聚合具有一定的阻聚作用，随着氢化丙烯酸松香用量的增加，单体转化率、凝胶率及相对分子质量下降，相对分子质量分布变窄。氢化丙烯酸松香的合适用量为8.0%wt，此时压敏胶的初黏力为15#，180°剥离强度为10.6N·25mm-1，持黏力大于120h。

氢化丙烯酸松香；丙烯酸酯；复合乳液；压敏胶

Abstract:Hydrogenated acrylic rosin/acrylate composite emulsion was prepared by pre-emulsification semi-continual emulsion polymerization with hydrogenated acrylic rosin as tackifier which was dissolved in the acrylate monomers.The effects of amount of hydrogenated acrylic rosin on the monomer conversion rate,gel rate,molecular weight and distribution of the sol,glass transition temperature of copolymer and properties of the pressure sensitive adhesive were investigated.The results showed that hydrogenated acrylic rosin played a role of inhibitor.Monomer conversion rate,gel rate,and molecular weight decreased and molecular weight distribution became narrow with the increase of the amount of hydrogenated acrylic rosin.The pressure sensitive adhesive was obtained and its probe tack was 15#,peel strength was 10.6 N·25mm-1and the holding power was over than 120h when the amount of the hydrogenated acrylic rosin was 8.0%wt.

Key words:Gydrogenated acrylic rosin;acrylate;composite emulsion;pressure sensitive adhesive

前 言

丙烯酸酯乳液具有优良的储存稳定性、耐候性及涂膜透明性，且水性环保无污染，在胶黏剂、涂料、油墨、纺织等领域都得到了广泛的应用。作为胶黏剂使用时，为了提高其粘接性能，拓宽其应用范围，人们常常将松香及其衍生物作增黏树脂引入丙烯酸酯乳液体系。但松香难溶于水，因此一般先用乳化剂水溶液将其分散，再与丙烯酸酯乳液混合。由于松香与丙烯酸酯的相容性不好[1]，以此方法制得的乳液不仅储存不稳定，且不能有效提高压敏胶的粘接性能。……