US Patent 7396876 Transparent and impact-resistant thermoplastic resin compositions

A thermoplastic resin component has improved transparency and impact resistance, the thermoplastic resin composed of 5 to 40 parts by weight of a graft copolymer (A) and 95 to 60 parts by weight a copolymer (B), the graft copolymer (A) being prepared by polymerizing at least one selected from the group consisting of alkyl methacrylate, aromatic vinyl, and vinylcyanide with an agglomerated rubber, the copolymer (B) being prepared by polymerizing at least one monomer selected from the group consisting of an aromatic vinyl monomer, an alkyl methacrylate monomer, and a vinylcyanide monomer. The agglomerated rubber is prepared by agglomerating a styrene-diene rubber latex with an acid-group-containing copolymer latex containing unsaturated acid, aromatic vinyl, and alkyl acrylate as the essential components and having a controlled refractive index.