AQUEOUS PRESSURE-SENSITIVE POLYMER ADHESIVE EMULSION BLEND COMPRISING HIGH TG POLYMER EMULSION AND PRESSURE-SENSITIVE ADHESIVE POLYMER EMULSION USEFUL AS PRESSURE-SENSITIVE ADHESIVE HAVING EXCELLENT BALANCE BETWEEN ADHESION AND COAGULATION, PREPARATION METHOD THEREOF AND USE THEREOF

摘要

PURPOSE: Provided are a method for improving the adhesion of an aqueous pressure-sensitive adhesive polymer emulsion and an aqueous pressure-sensitive polymer adhesive emulsion blend which is used to a pressure-sensitive paper label, a silicone-treated release liner and a substrate to be hardly adhered and is improved in the balance between adhesion and coagulation. CONSTITUTION: The method comprises the step of mixing 1-50 wt% (based on the dry weight) of a high Tg polymer emulsion and an aqueous pressure-sensitive adhesive emulsion to prepare an aqueous pressure-sensitive polymer adhesive emulsion, wherein the high Tg polymer emulsion has a Tg of 30-300 deg.C and a number average particle size of 80-1,000 nm and contains a particle with a particle size less than 80 nm by an amount less than 10 % and a particle with a particle size more than 1,000 nm by an amount less than 10 %. Preferably the high Tg polymer emulsion is formed by the emulsion polymerization of a monomer selected from the group consisting of styrene, a C1-C8 alkyl acrylate, a C1-C8 alkyl methacrylate, vinyl chloride, vinyl acetate, acrylonitrile, methacrylonitrile and their mixtures.