STYRENIC THERMOPLASTIC RESIN COMPOSITIONS WITH GOOD VACUUM-FORMING ABILITY

摘要

The thermoplastic resin composition according to the present invention comprises (A) 20-50 % by weight of a graft copolymer prepared by grafting 70-30 % by weight of monomer mixture of a vinyl cyanide compound and a vinyl aromatic compound onto 30-70 % by weight of butadiene rubber, (B) 40-60 by weight of a styrene-acrylonitrile copolymer prepared by polymerizing 50-90 % by weigth of a vinyl aromatic monomer and 10-50 % by weigth of a vinyl cyniade monomer and (C) 0.1-30 % by weight of an ultramacronmolecular copolymer with a weight average molecular weight from about 1,000,000 to about 5,000,000 prepared by polymerizing 50-90 % by weight ofa vinyl aromatic monomer and 10-50 % by weight of a vinyl cyanide monomer and (C) 0.1-30 % by weight of an ultramacromolecular copolymer with a weight average molecular weight form about 1,000,000 to about 5,000,000 prepared by polymerizing 50-90 % by weight of a vinyl aromatic monomer and 10-50 % by weight of a vinyl cyanide monomer.