Heat-resistant resin composition

A resin composition comprising:

• (A) at least one heat-resistant resin selected from group consisting of (1) a copolymer comprising a styrene compound and an .alpha.,.beta.-unsaturated dicarboxylic acid imide compound and (2) a rubber-reinforced copolymer comprising a styrene compound and an .alpha.,.beta.-unsaturated dicarboxylic acid imide compound,
• (B) at least one thermoplastic resin selected from the group consisting of (1) a high-impact resin obtained by graft-copolymerizing (i) styrene and acrylonitrile or (ii) styrene and methyl methacrylate to (iii) a butadiene rubber, an ethylene-propylene rubber or an acrylic ester rubber, and (2) a copolymer resin comprising (i) styrene and acrylonitrile or (ii) styrene and methyl methacrylate,
• (C) an antimony oxide,
• (D) at least one bromine-containing reaction product selected from the group consisting of (1) compound having a molecular weight of from 1,200 to 6,000 and a bromine content of from 5.0 to 60% by weight which is obtained by reacting a bromine-containing epoxy compound and 1,3,5-tribromophenol, and (2) a compound obtained by reacting a bromine-containing epoxy compound having an epoxy equivalent of from 450 to 7,000 and a bromine content of from 5.0 to 52% by weight and an acrylonitrile-butadiene copolymer having a carboxyl group at the both terminals thereof and a molecular weight of from 1,000 to 10,000, and
• (E) at least one silicon-containing compound selected from the group consisting of (1) silicone oil, (2) a ladder silicone resin, and (3) an alkoxysilane having a mercapto group, a vinyl group or a methacryloyl group,
• wherein the amounts of the styrene compound and .alpha.,.beta.-unsaturated dicarboxylic acid imide compound in said heat-resistant resin (A) are from 10 to 50% by weight based on the total amount of said heat-resistant resin (A) and thermoplastic resin (B), respectively;
• the ratio of the .alpha.,.beta.-unsaturated dicarboxylic acid imide compound to the total amount of said styrene compound and .alpha.,.beta.-unsaturated dicarboxylic acid imide compound is from 5 to 50% by weight;
• the total amount of a rubber reinforcement used in the rubber-reinforced copolymer of said heat-resistant resin (A) and the butadiene rubber, ethylene-propylene rubber and acrylic ester rubber used in said high-impact resin is from 5 to 35% by weight based on the total amount of said heat-resistant resin (A) and thermoplastic resin (B);
• the amount of said antimony oxide is from 0.5 to 10 parts by weight per 100 parts by weight of the total amount of said heat-resistant resin (A) and thermoplastic resin (B);
• the amount of said bromine-containing reaction product (D) is from 5.0 to 40 parts by weight per 100 parts by weight of the total amount of said heat-resistant resin (A) and thermoplastic resin (B);
• and the amount of said silicon-containing compound (E) is from 0.01 to 15 parts by weight per 100 parts by weight of the total amount of said heat-resistant resin (A) and thermoplastic resin (B).