Patent ID: 7936510

Claim:
An optical film comprising: i) a (meth)acrylic resin, and 5 to 45 parts by weight of ii) a graft copolymer, prepared by grafting a (meth)acrylic resin onto a copolymer of a (meth)acrylic rubber and an aromatic vinyl compound, based on 100 parts by weight of the i) (meth)acrylic resin, wherein the i) (meth)acrylic resin comprises a copolymer of a (meth)acrylic monomer, an aromatic vinyl monomer, and an acid anhydride in an amount of 60 to 90 parts by weight, 9 to 30 parts by weight, and 1 to 15 parts by weight, respectively, based on 100 parts by weight of the copolymer, and one or more selected from the group consisting of a vinylcyan compound, a (meth)acrylic acid, and an imide monomer as a comonomer.