IMPROVED THERMOPLASTIC RESIN COMPOSITION

摘要

PURPOSE:The titled composition excellent in heat and impact resistances, comprising a styrene/methacrylic acid copolymer, a rubber-modified styrene/maleic anhydride copolymer and a styrene/butadiene block copolymer. CONSTITUTION:50-90wt% styrene/methacrylic acid copolymer obtained by copolymerizing 99-50wt% styrene with 1-50wt% methacrylic acid and having a weight-average MW of 100,000-5000,000 and a weight-average MW to number- average MW ratio of 1.5-4.5 is blended with 5-40wt% rubber-modified styrene/ maleic anhydride copolymer having a molar ratio of styrene to maleic anhydride of 1.4-49 and a rubber component content of 2-25wt%, and 5-35wt% styrene/butadiene block copolymer of a butadiene content of 20-70wt%.