Patent ID: 9221231
Filing Date: 2015-12-29
Classification: B32B,C08G,C09J

Abstract:
1. An acrylate based adhesive sheet fabricated by sequentially accumulating a plurality of adhesive layers comprised of an acrylate based adhesive composition, the acrylate based adhesive composition comprising: a copolymer prepared by polymerizing monomers and then cross linking with a cross-linking agent, the monomers comprising: a first alkyl (meth)acrylate wherein the alkyl is a C16 to C22 linear alkyl group in an amount of about 1 to about 10 parts by weight based on 100 parts by weight of a total amount of the monomers; a second alkyl (meth)acrylate wherein the alkyl is a C1 to C12 alkyl group in an amount of 70 to 98 parts by weight based on 100 parts by weight of the total amount of the monomers; and a polar monomer in an amount of about 1 to about 20 parts by weight based on 100 parts by weight of the total amount of the monomers, wherein the copolymer and the cross-linking agent are comprised in a ratio of 100 parts by weight to about 0.5 to about 5 parts by weight, wherein 180 degree peeling strength between the adhesive layers contacting each other is greater than or equal to about 5 N/25 mm at an atmospheric temperature of about 23° C. and less than or equal to about 0.5 N/25 mm at an atmospheric temperature of about 90° C.