Flame-retardant polycarbonate compositions

摘要

Disclosed are non-bromine, flame-retardant polycarbonate resin compositions having increased reflectance and improved light shieldability, light fastness and moldability while still having good mechanical properties such as flame retardancy and impact resistance, and light reflectors as produced by molding the compositions. One type of the composition comprises (A) a polycarbonate resin and (B) a titanium oxide powder in a ratio by weight of from 70/30 to 90/10, and contains (C) a stilbene-bisbenzoxazole derivative in an amount of from 1 to 1000 ppm by weight and optionally (D) a non-halogen phosphate compound in an amount of from 0.05 to 1.00% by weight in term of phosphorus element, relative to the total weight of the component (A) and the component (B). The other type of the composition comprises (A) from 99.9 to 70% by weight of a polycarbonate resin and (B) from 0.1 to 30% by weight of a titanium oxide powder, and contains (D) a non-halogen phosphate compound in an amount of from 0.05 to 1.00 part by weight in term of phosphorus element, relative to 100 parts by weight of the sum of the component (A) and the component (B).