| 摘要 |
PURPOSE: To improve the thermal shock resistance, adhesive strength, and impact strength of a plating film by compounding a specific copolymer, a graft copolymer, and an organosilicon compd. CONSTITUTION: A graft copolymer is obtd. by the emulsion polymn. of 95-30 pts.wt. monomer mixture comprising 60-90wt.% arom. vinyl monomer, 10-40wt.% vinyl cyanide monomer, and 0-30wt.% other monovinyl monomer in the presence of 5-70 pts.wt. polydisperse rubber latex contg. 5-30wt.% rubber having an average particle size of 0.35-0.50μm, 70-95wt.% rubber having an average particle size of 0.2-0.32μm, and 0-15wt.% rubber having an average particle size of 0.2μm or lower. 100 pts.wt. compsn. comprising 10-90 pts.wt. graft copolymer obtd. as above and 90-10 pts.wt. copolymer formed from a monomer mixture comprising 60-90wt.% arom. vinyl monomer. 10-40wt.% vinyl cyanide monomer, and 0-30wt.% other vinyl monomer is compounded with 0.01-0.5 pt.wt. organosilicon compd. of the formula (wherein R1 and R2 are each H, alkyl, etc.; and n is 1 or higher) having a viscosity of 50, 000-100, 000cSt at 25 deg.C.
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