TACKIFYING RESIN EMULSION， WATER-BASED ADHESIVE COMPOSITION， AND ADHESIVE SHEET

An object of the present invention is to provide a novel tackifying resin emulsion which is excellent in emulsification property and mechanical stability and which can impart high water-resistant adhesion to the waterborne adhesive agent. This invention neutralizes the polymer (B) containing the structural unit 1 derived from tackifying resin (A)， and the structural unit 2 derived from (alpha)， (beta)-unsaturated dicarboxylic acid (b2) derived from an aromatic vinyl compound (b1). It is a tackifying resin emulsion which contains a salt and whose molar ratio of the carboxylate structure contained in the structural unit 1 and the structural unit 2 in the neutralization salt of the said polymer (B) is 1 / 1-3 / 1.

本发明的目的在于提供一种兼具优异乳化性与机械稳定性，且可赋予水性胶粘剂高耐水粘接性能的新型增粘树脂乳液（tackifying resin emulsion）。
本发明对包含下述结构单元的聚合物(B)进行中和处理：源自增粘树脂（tackifying resin）(A)的结构单元1，以及源自经芳香族乙烯基化合物（aromatic vinyl compound）(b1)衍生得到的(α,β)-不饱和二羧酸（(alpha,beta)-unsaturated dicarboxylic acid）(b2)的结构单元2。
该增粘树脂乳液包含该聚合物(B)的中和盐，且该中和盐中结构单元1与结构单元2所含羧酸根结构的摩尔比为1:1~3:1。