Patent ID: 8344051

Claim:
A composition comprising A) 10-90 parts by weight aromatic polycarbonate and/or aromatic polyester carbonate, B) 0.5-30 parts by weight rubber-modified graft polymer, C) 0.5-20 parts by weight of at least one phosphorus-containing flame retardant, D) 0.1-25.0 parts by weight surface-treated, calcined kaolin, E) 0-10 parts by weight of at least one other additive, F) 0-40 parts by weight vinyl (co)polymer (C.1) wherein said parts by weight are standardised such that the sum of the parts by weight of all components A+B+C+D+E+F in the composition adds up to 100, wherein the average particle diameter (d 50 value) of the kaolin used is from 0.1 μm to 5.0 μm, and wherein the surface of the calcined kaolin is modified by an organic titanium or silane compound of formula (V) R 1 —(CH 2 ) n -M-(X) 3 (V) with M=Ti or Si; R 1 =H, alkyl, aryl, alkylaryl, alkenyl, cycloalkyl, vinyl, amino, mercapto, acetoxy, alkoxy, epoxy and (meth)acryloxy; n=integer from 1-6; and X=selected from the group consisting of H, alkyl, aryl, alkylaryl, alkenyl, cycloalkyl, vinyl and OR 2 with R 2 =H, alkyl, aryl, alkylaryl, alkenyl, cycloalkyl, vinyl and alkyl ether and alkyl polyether.