(EN)
The invention provides a thermoplastic resin composition excellent in transparency and capable of giving molded articles which are excellent in impact resistance and fabrication quality even when they have thin walls. The thermoplastic resin composition comprises a rubber-modified styrene resin composition comprising 60 to 80 % by mass of a continuous phase made of a styrene/(meth)acrylate copolymer and 40 to 20 % by mass of a dispersed phase made of a graft copolymer obtained by grafting a rubbery elastomer with a styrene/(meth)acrylate copolymer wherein the volume-mean particle diameter of the dispersed phase is 0.3 to 0.6 mum and the weight-average molecular weight (Mw) of the continuous phase and the constituent monomer units thereof satisfy a specific relationship and is characterized by containing 0.005 to 0.05 part by mass of an organopolysiloxane and, if necessary, 0.1 to 2.5 parts by mass of an ester lubricant per 100 parts by mass of the rubber-modified styrene resin composition, X=weight average molecular weight (Mw)***(1)120000<=X<=160000(2).
(ZH) 本发明提供能够获得具有良好的透明性，并且即使是非常薄也具有优良的耐冲击性和成形加工性的成型品的热塑性树脂组合物。该热塑性树脂组合物含有橡胶改性苯乙烯系树脂组合物和有机聚硅氧烷，该橡胶改性苯乙烯系树脂组合物含有(I)苯乙烯-(甲基)丙烯酸酯系共聚物的连续相60～80质量%，该苯乙烯-(甲基)丙烯酸酯系共聚物是苯乙烯系单体、(甲基)丙烯酸酯系单体、和根据需要使用的可和这些单体共聚的乙烯系单体的共聚物；和(II)接枝共聚物的分散相40～20重量%，该接枝共聚物由苯乙烯-(甲基)丙烯酸酯系共聚物与胶状弹性体接枝而成，而该苯乙烯-(甲基)丙烯酸酯系共聚物是苯乙烯系单体、(甲基)丙烯酸酯系单体、和根据需要使用的可和这些单体共聚的乙烯系单体的共聚物，分散相的体积平均粒径为0.3～0.6μm，由连续相的重均分子量(Mw)和其构成单体单元求得的式(1)的X在式(2)的范围内，并且相对于该树脂组合物100质量份，含有有机聚硅氧烷0.005～0.05质量份，120000≤X≤160000 (2)。
