Patent ID: 8697767
Filing Date: 2014-04-15
Classification: C08G,C08L,C09J

Abstract:
1. A production method for a pressure-sensitive adhesive composition containing a cross-linked polymer in which an acrylic copolymer (A) is cross-linked by a polyurethane(meth)acrylate (B), the method comprising irradiating a monomer mixed liquid essentially containing a alkyl(meth)acrylate having an alkyl group having 1 to 18 carbon atoms and N,N-disubstituted acrylamide with an active energy ray in a presence of the polyurethane(meth)acrylate (B), wherein the amount of the alkyl(meth)acrylate in the monomer liquid is 50 to 99 wt %, and the amount of the N,N-disubstituted acrylamide in the monomer liquid is 1 to 50 wt %, wherein the polyurethane(meth)acrylate (B) comprises a polymer obtained by causing a hydroxyl group-containing acrylic monomer to react with a polyurethane prepolymer obtained by a reaction between a polyol compound and a polyisocyanate compound, and wherein a molar ratio between the polyol compound and the hydroxyl group-containing acrylic monomer is 1:0.1 to 1:0.5.