| abstract |
(57) 【Abstract】 PROBLEM TO BE SOLVED: A high graft ratio, a simple production process, low cost production, weather resistance, slidability, abrasion resistance, impact resistance, low temperature impact resistance, surface of a molded product. To provide a polyorganosiloxane-based graft copolymer excellent in appearance and glossiness, and a thermoplastic resin composition using the same. SOLUTION: In the presence of 5 to 80% by weight of a polyorganosiloxane (A) having a weight average molecular weight of 100,000 to 1,000,000, 95 to 20% by weight of a vinyl-based monomer (B) [however, (A) + (B) = 100% by weight], the graft ratio is 1 to 300%, and the intrinsic viscosity of the matrix component is 0.15 to 4, as well as this graft copolymer. A thermoplastic resin composition containing 1 to 99 parts by weight of a polymer and 99 to 1 parts by weight of another thermoplastic resin as a main component. |