Patent ID: 8440760
Filing Date: 2013-05-14
Classification: C08F,C08L

Abstract:
1. A methacrylic copolymer prepared by polymerizing a monomer mixture comprising: (a) about 20 to about 99.9% by weight of an aromatic methacrylate represented by the following Chemical Formula 1, an aliphatic methacrylate represented by the following Chemical Formula 2, or a combination thereof wherein m is an integer from 0 to 10, and X is a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group, a phenylphenyl group, a benzylphenyl group or an aminophenyl group; wherein m is an integer from 0 to 10, Y is oxygen (O) or sulfur (S), and Ar is a cyclohexyl group, a phenyl group, a methylphenyl group, a methylethylphenyl group, a methoxyphenyl group, a cyclohexylphenyl group, a chlorophenyl group, a bromophenyl group, a phenylphenyl group, or a benzylphenyl group; and (b) about 0.1 to about 80% by weight of a mono-functional unsaturated monomer selected from the group consisting of (meth)acrylic acid esters, acrylic acid esters, unsaturated carboxylic acids, acid anhydrides, hydroxyl group containing esters, (meth)acrylamides, unsaturated nitriles, allyl glycidyl ethers, glycidyl methacrylates, styrenic monomers, and combinations thereof; wherein a sample with a thickness of about 2.5 mm prepared by extruding a blend of said methacrylic copolymer and a bisphenol-A linear polycarbonate resin having a weight average molecular weight of about 25,000 g/mol at a ratio of 2:8 has a total light transmittance of about 10% or more and a haze of about 98% or less measured by a Haze meter.