Patent ID: 8329847
Filing Date: 2012-12-11
Classification: C08F,C08L,C09J,C09K,Y10T

Abstract:
1. An acrylic pressure-sensitive adhesive composition which comprises a (meth)acrylic copolymer comprising 70 to 95 parts by weight of an alkyl(meth)acrylic acid ester monomer, in which alkyl has 2 to 14 carbon atoms, and 5 to 30 parts by weight of a copolymerizable (meth)acrylic acid ester monomer containing an aromatic group; wherein the composition forms a crosslinking structure through the reaction of the (meth)acrylic copolymer and a multi-functional crosslinking agent, wherein the composition after forming the crosslinking structure has a gel fraction, represented by Equation 1, of 10 to 55% and a swelling ratio, represented by Equation 2, of 30 to 110, and wherein the composition after forming the crosslinking structure comprises a sol that is capable of being eluted with a solvent from the composition after forming the crosslinking structure and that has a weight average molecular weight of 600,000 or more: wherein, A represents weight of the composition after forming the crosslinking structure, B represents dry weight of insoluble content after depositing the composition after forming the crosslinking structure in a solvent at ambient temperature for 48 hours, and C represents weight of insoluble content swollen with a solvent after depositing the composition after forming the crosslinking structure in the solvent at ambient temperature for 48 hours.