Patent ID: 8372492
Filing Date: 2013-02-12
Classification: C09J,C09K,G02B,Y10T

Abstract:
1. A pressure-sensitive adhesive optical film, comprising: an optical film comprising a transparent base film and a discotic liquid crystal layer on one side of the transparent base film; and a pressure-sensitive adhesive layer that is provided on the discotic liquid crystal layer, wherein the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive containing an acrylic polymer comprising 30 to 90% by weight of an alkyl(meth)acrylate (a1) and 10 to 70% by weight of a ring structure-containing (meth)acrylate (a2) as monomer units and a crosslinking agent, wherein the ring structure-containing (meth)acrylate (a2) is an aromatic ring structure-containing (meth)acrylate where the aromatic ring structure is linked by an ether linkage which produces higher polarizability, a weight average molecular weight of the acrylic polymer is within a range of above 2,000,000 to 3,000,000, and the percentage of components with a molecular weight of 100,000 or less in the acrylic polymer is 15% or less by area as measured by gel permeation chromatography.