| 摘要 |
PURPOSE: Provided is a styrene-based thermoplastic resin composition excellent in vacuum-formability, which has improved stretch property by using styrene-acrylonitrile with ultrahigh molecular weight. CONSTITUTION: The styrene-based thermoplastic resin composition comprises: 20-50wt% of a graft copolymer having a weight average molecular weight of 50,000-100,000 and a graft rate of 50-100%, which is produced by graft-polymerizing 30-70wt% of a butadiene rubber and 70-30wt% of a mixture of an aromatic vinyl monomer and a vinyl cyanide monomer; 40-60wt% of a styrene-acrylonitrile copolymer having a weight average molecular weight of 100,000-500,000, which is produced by copolymerizing 50-90wt% of the aromatic vinyl monomer and 50-10wt% of the vinyl cyanide monomer; 0.1-30wt% of the styrene-acrylonitrile copolymer having an ultrahigh molecular weight, which has a weight average molecular weight of 1,000,000-5,000,000 and is produced by copolymerizing 50-90wt% of the aromatic vinyl monomer and 10-50wt% of the vinyl cyanide monomer.
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