Patent ID: 9422461
Filing Date: 2016-08-23
CPC Classification: B32B,C09J,Y10T

Claim Text:
1. A pressure sensitive adhesive comprising a polymer obtained by polymerizing 100 mass parts of a monomer mixture comprising: 46 to 53 mass parts of a monomer component (1) comprising an acrylate mixture selected from an aliphatic alkyl (meth) acrylate having a carbon number of 4 to 6 and an aliphatic alkyl (meth) acrylate having a carbon number of 7 to 12, wherein monomer component (1) has a mass ratio of the aliphatic alkyl (meth) acrylate having a carbon number of 4 to 6 to the aliphatic alkyl (meth) acrylate having a carbon number of 7 to 12 of 3:7 to 7:3; 26 to 34 mass parts of a monomer component (2) selected from the group consisting of amide group-containing vinyl monomers expressed by Formula 1: wherein R is hydrogen or a methyl group; R 1 and R 2 are selected from hydrogen and linear or branched alkyl groups having a carbon number of 1 to 4, wherein R 1 and R 2 are not both hydrogen at the same time; 10 to 30 mass parts of a monomer component (3) selected from the group consisting of esters of a non-tertiary aromatic alcohol and (meth) acrylic acid, and esters of a non-tertiary alicyclic alcohol and (meth) acrylic acid, wherein the monomer component (3) is such that a Tg of a homopolymer thereof is −25° C. or higher; 0 to 3 mass parts of a monomer component (4) comprising (meth) acrylic acid; 0.01 to 0.5 mass parts of a cross linking agent; and 0.05 to 1.0 mass parts of a polymerization initiator.