Thermoplastic moulding materials with high tracking resistance

Claim 1

A thermoplastic moulding material containing (A) 60 to 85 parts by weight of a copolycarbonate containing 3 to 20% by weight of halogen, of a divalent phenol and a divalent halogenated phenol, (B) 10 to 30 parts by weight of a graft polymer of (1) 5 to 90 parts by weight, of a mixture of (i) 50 to 95% by weight of styrene, α-methylstyrene, nuclear-substituted styrene, methylmethacrylate or mixtures thereof, and (ii)50 to 5% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleimide or mixtures thereof, on (2) 95 to 10 parts by weight of an acrylate rubber having a glass transition temperature T G ≦10° C. (C) 5 to 30 parts by weight of a thermoplastic copolymer from (1) 50 to 95% by weight of styrene, α-methylstyrene, nuclear-substituted styrene, methyl methacrylate or mixtures thereof, and (2) 50 to 5% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-sustituted maleimide or mixture thereof, wherein the percentages of A, B and C must add up to 100 (D) 0.05 to 2.0 parts by weight, relative to 100 parts by weight of A+B+C, of a tetrafluoroethylene polymer having a density of 2.0 to 2.3 g/cm 3 and a mean particle diameter of 100 to 1000 μm, and (E) 1 to 5 parts by weight, relative to 100 parts by weight of A+B+C, of antimony trioxide, antimony carbonate, bismuth trioxide or bismuth carbonate and (F) 4 to 12 parts by weight, relative to 100 parts by weight of A+B+C, of titanium dioxide and, (G) 0 to 15 parts by weight, relative to 100 parts by weight of A+B+C, of a low-molecular weight, organic halogen compound, the halogen content resulting from components A+G, however, not exceeding 20% by weight, relative to the total weight of components A+G.