| 摘要 |
PURPOSE: A styrene-based thermoplastic resin composition is provided, which exhibits excellent vacuum moldability and improved elongation and fluidity by employing a superhigh molecular weight SAN copolymer having a nonlinear structure. CONSTITUTION: The thermoplastic resin composition comprises 20-50 wt% of a graft copolymer which is prepared by graft polymerizing 30-70 wt% of a mixture of an aromatic vinyl-based monomer and a cyanovinyl-based monomer to 30-70 wt% of a butadiene-based rubber, and has an average weight molecular weight of 50,000-100,000; 40-70 wt% of a styrene-acrylonitrile copolymer which is prepared by copolymerizing 50-90 wt% of an aromatic vinyl-based monomer and 10-50 wt% of a cyanovinyl-based monomer, and has an average weight molecular weight of 100,000-300,000; and 0.1-30 wt% of a copolymer which is prepared by adding 0.01-5 parts by weight of a multifunctional mercaptan and 0.005-5 parts by weight of a multifunctional acryl-based monomer to 100 parts by weight of a monomer mixture comprising 50-90 wt% of an aromatic vinyl-based monomer and 10-50 wt% of a cyanovinyl-based monomer, and has a superhigh molecular weight and a nonlinear structure. |
