Flame-retardant impact-modified thermoplastic compositions

Abstract

The present invention relates to a thermoplastic composition comprising, based on the weight of the composition, (A) 60 to 95 wt. % of aromatic polycarbonate, (B) 3 to 15 wt. % of impact modifier, (C) 2 to 20 wt. % of a flame-retardant additive comprising at least one cyclic phosphazene (C-1) and at least one oligomeric phosphate (C-2) (D) 0 to 5 wt. % of other components; wherein, the combined amounts of (A) to (D) is 100 wt. %, and wherein the composition has: —a notched Izod impact resistance determined in accordance with ASTM D-256 at a temperature of 23° C. of at least 300 J/m, preferably from 300-900 J/m; —a melt flow rate determined in accordance with ASTM D1238 (300° C., 1.2 kg) of at least 7.0 g/10 min, preferably between 7.0-20.0 g/10 min; and —a UL94 rating of V0 at a thickness of 0.75 mm.

Dependencies are inferred from the claim text.