Patent ID: 9353255
Filing Date: 2016-05-31
CPC Classification: C08F,C08L

Claim Text:
1. A graft copolymer composition comprising: a graft copolymer comprising a seed, a core and a shell; and a matrix polymer, wherein a difference between a refractive index of the seed and a refractive index (μ a difference between a refractive index of the shell, and a refractive index (μ a difference between a refractive index of the core and a refractive index (μ the graft copolymer satisfies the following Equations 1 and 2: wherein r1 represents a thickness (nm) from the center to the seed of the graft copolymer and r2 represents a thickness (nm) from the center to the core of the graft copolymer, wherein the graft copolymer has a graft ratio higher than 25% and a gel content lower than 90%, and the graft copolymer comprises a styrene, vinyl toluene or styrene monomer derivative; an alkyl (meth)acrylate compound; and acrylonitrile, methacrylonitrile or a mixture thereof, and wherein a weight ratio of the seed to the core to the shell is 10 to 35:30 to 55:30 to 45.