Thermoplastic moulding materials with high tracking resistance

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, .alpha.-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.sub.G .ltoreq.10.degree. C.
• (C) 5 to 30 parts by weight of a thermoplastic copolymer from
• (1) 50 to 95% by weight of styrene, .alpha.-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.sup.3 and a mean particle diameter of 100 to 1000 .mu.m, 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.