| 摘要 |
PURPOSE:To provide a composition having high heat deformation temperature and excellent impact resistance and thermal stability, and containing a copolymer obtained by polymerizing alpha-methylstyrene, a vinyl cyanide monomer and maleimide monomer, adding a maleimide monomer to the polymer, and subjecting to the two-step polymerization. CONSTITUTION:(A) 5-95pts.wt. of a copolymer obtained by (1) polymerizing 75-99pts.wt. of a mixture of (i) 50-95wt% alpha-methylstyrene, 5-35wt% vinyl cyanide monomer and 1-30wt% maleimide monomer until the polymerization ratio reaches 50-95% and (2) adding 25-1pts.wt. of a monomer containing a maleimide monomer as an essential component to the polymer and continuing the polymerization, is compounded with (B) 5-70pts.wt. of a graft copolymer obtained by grafting a mixture containing an aromatic vinyl monomer and a vinyl cyanide monomer as essential components in the presence of 20-80pts.wt. of a rubbery polymer, and (C) 0-80pts.wt. of a copolymer containing an aromatic vinyl monomer and a vinyl cyanide monomer, wherein (A)+(B)+(C) is 100pts.wt. |
