Patent ID: 7375161
Filing Date: 2008-05-20
Classification: C08F,C09J

Abstract:
1. A process for producing an emulsion pressure-sensitive adhesive, which process comprises (co)polymerizing a monomer having a polymerizable unsaturated bond based on alkyl acrylates as a main component in the presence of a protective colloid, the protective colloid being an acrylic copolymer consisting essentially of: (A-1) at least one hydrophilic monomer selected from the group consisting of acrylamide, methacrylamide, hydroxyethyl acrylate and hydroxyethyl methacrylate; and (B-1) an alkyl (meth)acrylate that is copolymerizable with the hydrophilic monomer (A-1) and whose alkyl group has 4 to 18 carbon atoms; the hydrophilic monomer and the alkyl (meth)acrylate being copolymerized in a weight ratio in the range of 40-70:60-30; the acrylic copolymer having a weight-average molecular weight in the range of 500 to 50000.