ACRYLIC COPOLYMER EMULSION AND EMULSION-TYPE ACRYLIC PRESSURE-SENSITIVE ADHESIVE

摘要

PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive excellent in adhesiveness to a film base material, even after immersed in water.;SOLUTION: An acrylic copolymer emulsion for the pressure-sensitive adhesive is formed by copolymerizing an acrylic monomer in water and has an average particle size of 0.08-0.15 μm, wherein the acrylic monomer comprises an acrylic acid alkyl ester of which the alkyl is composed of 4 to 12 carbon atoms (a) in an amount of 50-85 wt%, a methacrylic acid alkyl ester of which the alkyl is composed of 1 to 4 carbon atoms (b) in an amount of 1-10 wt%, an acrylic acid alkyl ester of which the alkyl is composed of 1 to 3 carbon atoms (c) in an amount of 10-30 wt%, and acrylic acid and methacrylic acid mixed in a weight ratio of the acrylic acid to the methacrylic acid of 1/1 to 1/5 (d) in an amount of 2-10 wt%.;COPYRIGHT: (C)2005,JPO&NCIPI