The present invention relates to a thermoplastic resin composition comprising 20 to 60 parts by weight of a rubber-reinforced resin (A) and 80 to 40 parts by weight of an aromatic polycarbonate (B) having an average molecular weight of 16,000 to 30,000 ((A) + (B) = 100 parts by weight),
said rubber-reinforced resin (A) containing a grafted rubber-like polymer (A1) obtained by polymerizing at least one compound (b) selected from the group consisting of aromatic vinyl compounds, vinyl cyanide compounds, (meth) acrylic ester compounds, acid anhydride monomeric compounds and maleimide-based compounds in the presence of a rubber-like polymer (a) having a glass transition temperature of not more than -40°C,
the content of the rubber-like polymer (a) in the rubber-reinforced resin (A) being 10 to 70% by weight, and
the grafted rubber-like polymer (A1) having such a particle size distribution that the weight percentage of the particles having a size of not less than 80 nm and less than 200 nm is not less than 30%, the weight percentage of the particles having a size of not less than 200 nm and less than 350 nm is not more than 70%, and the weight percentage of the particles having a size of not less than 350 nm is not more than 15%.
本发明涉及一种热塑性
树脂组合物,其中包括 20 至 60 份(按重量计)橡胶增强
树脂 (A)和 80 至 40 份(按重量计)芳香族聚
碳酸酯(B),其平均分子量为 16,000 至 30,000 ((A)+(B)=100 份(按重量计))、
所述橡胶增强
树脂(A)含有一种接枝的类橡胶聚合物(A1),该聚合物是通过聚合至少一种选自芳香族
乙烯基化合物、
氰化
乙烯基化合物、(甲基)
丙烯酸酯化合物、酸酐单体化合物和马来
酰亚胺基化合物的化合物(b),在类橡胶聚合物(a)存在的情况下获得的,类橡胶聚合物(a)的
玻璃化转变温度不高于-40°C、
类橡胶聚合物(a)在橡胶增强
树脂(A)中的含量为 10%至 70%(按重量计),以及
接枝的类橡胶聚合物(A1)的粒度分布如下:粒度不小于 80 nm 且小于 200 nm 的颗粒的重量百分比不小于 30%,粒度不小于 200 nm 且小于 350 nm 的颗粒的重量百分比不大于 70%,粒度不小于 350 nm 的颗粒的重量百分比不大于 15%。