Patent ID: 6956073

Claim:
A flame-retardant resin composition comprising (A) (1) a resin component (Component A-1) containing 50 to 100% by weight of an aromatic polycarbonate resin and 0 to 50% by weight of a styrene-containing resin or (2) a resin component (Component A-2) containing 20 to 80% by weight of a polyphenylene ether resin and 80 to 20% by weight of a polystyrene, provided that Component A-1 or Component A-2 will be referred to as Component A, and (B) a flame retardant (Component B) that is a phosphoric ester of the following formula (I), the phosphoric ester containing, per 100% by weight thereof, 3% by weight or less of a component having a condensation degree n of 0, 86.5 to 98.5% by weight of a component having a condensation degree n of 1, 1 to 9% by weight of a component having a condensation degree n of 2 and 1.5% by weight or less of a component having a condensation degree n of ≧3, and having a weight average condensation degree N in the range of 1.01 to 1.10 when the weight average condensation degree N is calculated without the component having a condensation degree n of 0, the flame-retardant resin composition containing, per 100% by weight of the total of Component A and Component B, 65 to 99% by weight of.Component A and 1 to 35% by weight of Component B, wherein each of R1, R2, R3 and R4 is independently an aryl group having 6 to 12 carbon atoms, each of R5 and R6 is independently methyl or a hydrogen atom, each of R7 and R8 is methyl, m1 and m2 are 0 or integers of 1 or 2, each of a, b, c and d is independently 0 or 1, and n is 0 or an integer of 1 to 5.