| 摘要 |
PURPOSE:To obtain the titled composition having excellent surface gloss, appearance of the molded article and impact resistance, by the graft-copolymerization of an aromatic vinyl compound in the presence of an ethylene-alpha-olefin rubbery polymer having a specific Mooney viscosity. CONSTITUTION:An aromatic vinyl compound (e.g. styrene, vinylnaphthalene, etc.) and if necessary other monomers copolymerizable therewith (e.g. methyl acrylate, maleic anhydride, etc.) are copolymerized in the presence of an ethylene-alpha-olefin rubbery polymer (e.g. ethylene-propylene copolymer rubber, ethylene-propylene-non-conjugated diene copolymer rubber, etc.) having a Mooney viscosity (ML1+4, 100 deg.C) of <=40. The monomer to be copolymerized is preferably a vinyl cyanide compound, and the weight ratio of the aromatic vinyl compound to the vinyl cyanide compound is preferably (60-95)/(40-5).
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