Patent ID: 7576156
Filing Date: 2009-08-18
Classification: C08K,C08L,C09J,Y10S,Y10T

Abstract:
1. An acrylic pressure-sensitive adhesive composition comprising (a) an acrylic polymer, wherein the acrylic polymer is a copolymer of alkyl(meth)acrylate and at least one copolymerizable monomer selected from the group consisting of glycidyl(meth)acrylate, (meth)acrylic acid, itaconic acid, maleic anhydride, (meth)acrylamide, (meth)acryl N-hydroxyamide, alkylaminoalkyl(meth)acrylate, vinyl acetate, styrene, and acrylonitrile, and (b) a tackifier obtained by acid modification of a tackifier resin inherently free of an acid component, wherein the tackifier resin is selected from the group consisting of terpene resins, petroleum hydrocarbon resins, coumarone-indene resins, styrene resins, xylene resins, and any of the foregoing after hydrogenation, wherein the acid modification of the tackifier resin is effected by reaction of the tackifier resin with a carboxylic acid group-containing monomer, and wherein the tackifier has a weight-average molecular weight (Mw) of 1000-6000, and an acid value of 5-100 mg KOH/g.