| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition good in moldability and giving molded products good in impact resistance, chemical resistance and appearance by compounding two kinds of specific graft copolymers and a rigid copolymer. SOLUTION: Thus resin composition comprises (A) a graft copolymer the graft degree Gr% of the equation I [(x) is the weight of a sample; (y) is the weight of acetone insolubles at the ordinary temperature] satisfies the inequality II (R is the fraction of a dienic rubbery polymer)} produced by emulsion-grafting a monomer mixture (comprising 40-80wt.% of an aromatic vinyl monomer, 20-60wt.% of a vinyl cyanide monomer and 0-20wt.% of a vinylic comonomer) to the dienic rubber polymer having a weight-average particle diameter of 0.10-0.65μm, (B) a graft copolymer obtained by emulsion-polymerizing the above monomer mixture to an acrylic rubber polymer, and (C) a rigid copolymer produced by copolymerizing the above monomer mixture, in the composition ratios of the inequalities III and IV.
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