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Abstract

A heat and impact resistant composition comprising: (A) 5-89 parts by weight of a graft polymer prepared by graft polymerizing 30-75 parts by weight of a mixture of 30-80% of an aromatic vinyl monomer, 10-50% of an N-substituted maleimide monomer, 10-45% of a vinyl cyanide monomer and 0-30% of another copolymerizable vinyl monomer onto 25-70 parts by weight of a diene rubber (a); (B) 10-90 parts by weight of a copolymer obtained by polymerizing a mixture of 30-80% of an aromatic vinyl monomer, 10-50% of an N-substituted maleimide monomer, 10-40% of a vinyl cyanide monomer and 0-30% of another copolymerizable vinyl monomer, or (B') an imido group--containing adduct of a copolymer obtained by reacting a primary amine and/or ammonia with a copolymer obtained by polymerizing a mixture of 30-80% of an aromatic vinyl monomer, 5-50% of an alpha, beta-unsaturated dicarboxylic acid anhydride monomer and 0-40% of another copolymerizable vinyl monomer; (C) 1-45 parts be weight of a graft polymer made by graft polymerizing 83-98 parts by weight of a mixture of 55-85% of an aromatic vinyl monomer and 15-45% of a vinyl cyanide monomer onto 2-17 parts by weight of a diene rubber (c); (D) 0-50 parts by weight of a copolymer obtained by polymerizing a mixture of 55-85% of an aromatic vinyl monomer and 15-45% of a vinyl cyanide monomer, provided that the total of (A), (B) or (B'), (C) and (D) is 100 parts by weight, and also provided that the total weight of monomers in each of (A), (B) or (B'), (C) and (D) is 100%.

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First Claim