Thermoplastic moulding compositions with flame-resistant properties

Claim 1

A thermoplastic moulding composition consisting of (A) 50 to 90 parts by weight of a thermoplastic, halogen-free, aromatic polycarbonate of 2,2-bis-(4-hydroxyphenyl)-propane or 1,1-bis-(4-hydroxyphenyl-cyclohexane, (B) 10 to 50 parts by weight of a halogen-free copolymer of random structure, comprising 95 t 70% by weight, of styrene, α-methylstyrene or nuclear-alkylated styrene(s), or mixtures of these vinyl aromatics, and 5 to 30% by weight, of maleic anhydride, (C) 5 to 15 parts by weight, based on 100 parts of the total weight of (A)+(B), of a halogen-free phosphorus compound of the general formula ##STR4## in which R 1 , R 2 and R 3 , independently of one another, denote a C 1 -C 8 -alkyl or an optionally alkyl-substituted C 6 -C 20 -aryl, and n is 0 or 1, and (D) 0.05-5 parts by weight, again based on 100 parts of the total weight of (A)+(B), of a tetrafluoroethylene polymer.