FLAME-RETARDANT RESIN COMPOSITION

摘要

A flame-retardant resin composition comprising (a) a copolymer obtained by copolymerizing from 65 to 80% by weight of .alpha.-methylstyrene, from 15 to 30% by weight of acrylonitrile and from 0 to 30% by weight of a monomer copolymerizable therewith and having a number average molecular weight of from 15,000 to 80,000; (b) a graft copolymer obtained by copolymerizing from 20 to 70 parts by weight of a monomer mixture of from 50 to 80% by weight of styrene, from 15 to 35% by weight of acrylonitrile and from 0 to 30% by weight of other vinyl compound copolymerizable therewith in the presence of from 30 to 80 parts by weight of a rubber having a glass transition temperature of not higher than 0.degree.C; and (c) a vinyl chloride resin; wherein the total amount of components (a) and (b) is from 10 to 80 parts by weight while the amount of component (c) is from 20 to 90 parts by weight, and the proportion of component (a) is from 30 to 90% by weight relative to the proportion of component (b) being from 10 to 70% by weight.