Patent ID: 7985803
Filing Date: 2011-07-26
Classification: C08L,G02B

Abstract:
1. An optical compensation film comprising a resin composition, wherein the resin composition comprises: a styrene resin (a) having a positive photoelastic coefficient at 23° C. and a negative inherent birefringence, the styrene resin being selected from the group consisting of a styrene-acrylonitrile copolymer having a content of acrylonitrile of from 1 to 40% by mass, a styrene-methacrylic acid copolymer having a content of methacrylic acid of from 0.1 to 50% by mass, and a styrene maleic anhydride copolymer having a content of maleic anhydride of from 0.1 to 50% by mass; and an acrylic resin (b) having a negative photoelastic coefficient at 23° C. and a negative inherent birefringence, the acrylic resin (b) being formed from a monomer starting material containing 50 to 100% by mass of an alkyl ester of acrylic acid or an alkyl ester of methacrylic acid.