Flame-retardant resin composition and flame-retardant resin molded article

A flame-retardant resin composition comprising:

• a styrene-based resin;
• a brominated polymer-based flame retardant;
• an epoxy compound;
• an antioxidant;
• and
• a halogen capture agent for improving a thermal stability of the brominated polymer-based flame retardant, the halogen capture agent consisting of a dolomite-based compound and a hydrotalcite-based compound, wherein
• a content of bromine is 18 to 42% by mass,
• 4 to 25 parts by mass of the epoxy compound, 0.8 to 7 parts by mass of the antioxidant and 0.8 to 15 parts by mass of the halogen capture agent based on a total of 100 parts by mass of the styrene-based resin and the brominated polymer-based flame retardant are present, and
• the brominated polymer-based flame retardant has the following features (a) to (f):
• (a) the brominated polymer is a brominated styrene-butadiene block copolymer having butadiene and styrene as a monomer component;
• (b) a content of the styrene monomer in the copolymer before bromination is 5 to 90% by mass;
• (c) 1,2-butadiene is contained in the butadiene;
• (d) a weight average molecular weight (Mw) is 1000 or more;
• (e) a content of unbrominated nonaromatic double bonds determined by 1H-NMR spectroscopy is less than 50% based on a content of nonaromatic double bonds of the copolymer before bromination;
• and
• (f) 5% weight reduction temperature obtained by thermogravimetric analysis (TGA) is 200° C. or higher.