Patent ID: 8242225

Claim:
An optical film including a copolymer comprising: (a) 0.1-30 mole % of an alkene monomer selected from the group consisting of ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-hepthene, 1-octene, 1-nonene, 1-decene, 2-butene, 2-pentene, 2-hexene, 3-hexene, 2-hepthene, 2-octene and 2-nonene; (b) 30-99 mole % of an acrylate monomer; and (c) 0.1-50 mole % of at least one of an unsaturated organic acid monomer and an unsaturated acid anhydride monomer having one or more double bonds, and wherein a glass transition temperature (Tg) of the copolymer is in the range of 100-220° C.