Patent ID: 9556302
Date: 2017-01-31
CPC Classifications: C08F,C08L,Y10T

Claim:
1. A graft copolymer, wherein the graft copolymer is a graft copolymer (A) prepared by graft polymerization of 20 to 90 parts by weight of at least one monomer (a2) selected from aromatic vinyl monomers, vinyl cyanide monomers, and other vinyl monomers copolymerizable with these monomers onto 10 to 80 parts by weight of a composite rubber (a1) comprising 5% to 50% by weight of a conjugated diene rubber polymer and 50% to 95% by weight of a cross-linked acrylic ester polymer (provided that the total amount of the composite rubber (a1) and the monomer (a2) is 100 parts by weight), wherein the composite rubber (a1)has a tetrahydrofuran-soluble portion having a weight-average molecular weight of 50000-100000 in terms of polystyrene and has a degree of swelling in toluene of 7.0-13.0.