PRESSURE-SENSITIVE ADHESIVE FOR POLYVINYL CHLORIDE MOLDING

摘要

PURPOSE:To provide the titled pressure-sensitive adhesive which can bond PVC moldings contg. a low-molecular plasticizer with good durability, by using, as the principle ingredient, an emulsion of a copolymer particle having a multi-layer structure wherein the inner layer and the outer layer are each composed of a specified (co)polymer. CONSTITUTION:The inner (most) layer of a copolymer particle having a multi- layer structure is formed from a copolymer obtd. from 0.1-10pts.wt. alpha,beta-ethylenically unsaturated monomer (A) having an epoxy group, 0.1-20pts.wt. alpha, beta- ethlenically unsaturated monomer (B) having a polar group reactive with the epoxy group in component A and 99.8-70pts.wt.alpha, beta-ethylenically unsaturated monomer (C) copolymerizable with components A and B. The outer (most) layer is formed from a (co) polymer obtd. by using a 4C or higher alkyl (meth) acrylate as the essential ingredient. The titled adhesive is obtd. by using an emulsion of the copolymer particle having the above multi-layer structure as the principle ingredient.