Patent ID: 8709597

Claim:
A pressure-sensitive adhesive layer for an optical film, which is: a product obtained by forming a coating of the pressure-sensitive adhesive composition comprising: a (meth)acrylic polymer comprising (a) 34 to 94% by weight of an alkyl (meth)acrylate monomer unit, (b) 5 to 35% by weight of an aromatic ring-containing (meth)acrylate monomer unit, and (c) 0.01 to 0.5% by weight of an amino group-containing (meth)acrylate monomer unit, and further comprising (d) 0.05 to 3% by weight of a carboxyl group-containing (meth)acrylate monomer unit and/or (e) 0.05 to 2% by weight of a hydroxyl group-containing (meth)acrylate monomer unit and having a weight average molecular weight of 1,800,000 to 2,800,000 as determined by gel permeation chromatography; crosslinking agents comprising 0.01 to 5 parts by weight of an isocyanate crosslinking agent and 0.01 to 2 parts by weight of a silane coupling agent based on 100 parts by weight of the (meth)acrylic polymer; and, subjecting the coating to a crosslinking reaction, wherein the coating has a gel fraction of 55 to 95% and a refractive index of less than 1.50 one hour after the formation of the coating.