| 摘要 |
Disclosed is a polymer composition based on a polycarbonate and a graft copolymer of a vinyl aromatic compound and an unsaturated nitrile comound on a rubber-like polymer. Good flow properties are achieved by a composition consisting essentially of: A. at least one graft copolymer obtained by polymerizing 40-80 parts by weight of a monomer mixture, which mixture consists of: (1) 20-40 weight % of acrylonitrile, and (2) 60-80 weight % of styrene, in the presence of 10-25 parts by weight of a hydrocarbon rubber, B. at least one graft copolymer obtained by polymerizing 75-90 parts by weight of a monomer mixture, which mixture consists of: (1) 20-40 weight % of acrylonitrile, and (2) 60-80 weight % of styrene, in the presence of 10-25 parts by weight of a hydrocarbon rubber, C. a copolymer obtained by polymerizing 20-40 parts by weight of acrylonitrile with 60-80 parts by weight of styrene, and D. at least one polycarbonate, wherein based on the weight of the composition, the total rubber content is from about 5 to about 30 weight % and the difference in rubber content between components A and B is at least 5 weight %. Each monomer mixture used to formulate graft copolymer components A and B may additionally, based on the weight of the mixture, contain up to 20 weight % of at least one additional monomer.
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