Flame-retardant, high-impact polycarbonate molding compounds

A thermoplastic molding compound consisting of

• A) 50 to 96.5 parts by weight of one or more thermoplastic, halogen-free aromatic polycarbonates based on diphenols corresponding to ##STR9## wherein A is a single bond, C.sub.1-5 alkylene, C.sub.2-5 alkylidene, C.sub.5-6 cycloalkylidene, --S-- or --SO.sub.2
• B) 4.5 to 10 parts by weight of one or more halogen-free graft polymers of
• B.1) 5 to 90 parts by weight, based on B), of a mixture of
• B.1.1) 50 to 95% by weight styrene, .alpha.-methyl styrene, nucleus-substituted styrene, methyl methacrylate or mixtures thereof and
• B.1.2) 50 to 5% by weight (meth)acrylonitrile, methyl methacrylate, n-butyl acrylate, t-butyl (meth)acrylate or mixtures thereof on
• B.2) 95 to 10 parts by weight, based on B), of a rubber having a glass temperature T.sub.g of .ltoreq.10.degree. C. selected from the group consisting of butadiene, butadiene/styrene copolymer, polyisoprene, EPDM and silicone rubbers, and
• C) 0 to 40 parts by weight of a halogen-free, thermoplastic copolymer of
• C1) 50 to 95% by weight styrene, .alpha.-methyl styrene, nucleus-substituted styrene, methyl methacrylate or mixtures thereof, and
• C2) 50 to 5% by weight (meth)acrylonitrile, methyl methacrylate or mixtures thereof,
• the sum of the parts by weight of A)+B)+optionally C) having to amount to 100 parts by weight, and
• D) 1 to 20 parts by weight, based on 100 parts by weight of A)+B)+optionally C), of a halogen-free phosphorus compound corresponding to ##STR10## in which R.sub.1, R.sub.2 and R.sub.3 independently of one another represent C.sub.1 -C.sub.8 alkyl or C.sub.6 -C.sub.20 aryl and n=0 or 1, and
• E) 0.05 to 5 parts by weight, based on 100 parts by weight of A)+B)+optionally C), of a tetrafluoroethylene polymer having average particle sizes of 0.05 to 1000 .mu.m, a density of 1.2 to 2.3 g/cm.sup.3 and a fluorine content of 65 to 76% by weight.

A thermoplastic molding compound consisting of

• A) 60 to 96 parts by weight of one or more thermoplastic, halogen-free aromatic polycarbonates based on diphenols corresponding to ##STR11## wherein A is a single bond, C.sub.1-5 alkylene, C.sub.2-5 alkylidene, C.sub.5-6 cycloalkylidene, --S-- or SO.sub.2
• B) 4.0 to 15 parts by weight, of one or more halogen-free graft polymers of
• B.1) 5 to 90 parts by weight, based on B), of a mixture of
• B.1.1.) 50 to 95% by weight styrene, .alpha.-methyl styrene, nucleus-substituted styrene, methyl methacrylate or mixture thereof and
• B.1.2) 50 to 5% by weight (meth)acrylonitrile, methyl methacrylate, n-butyl acrylate, t-butyl (meth) acrylate or mixtures thereof on
• B.2) 95 to 10 parts by weight, based on B), of a rubber having a glass temperature T.sub.g of .ltoreq.10.degree. C. selected from the group consisting of butadiene, butadiene/styrene copolymer, polyisoprene, EPDM and silicone rubbers, and
• C) 0 to 40 parts by weight of a halogen-free, thermoplastic copolymer of
• C.1) 50 to 95% by weight styrene, .alpha.-methyl styrene, nucleus-substituted styrene, methyl methacrylate or mixtures thereof, and
• C.2) 50 to 5% by weight (meth)acrylonitrile, methyl methacrylate or mixtures thereof,
• the sum of the parts by weight of A)+B)+optionally C) having to amount to 100 parts by weight, and
• D) 1 to 20 parts by weight, based on 100 parts by weight of A)+B)+optionally B), of a halogen-free phosphorus compound corresponding to ##STR12## in which R.sub.1, R.sub.2 and R.sub.3 independently of one another represent C.sub.1 -C.sub.8 alkyl or C.sub.6 -C.sub.20 aryl and n=0 to 1,
• E) 0.05 to 5 parts by weight, based on 100 parts by weight of A)+B)+optionally C), of a tetrafluoroethylene polymer having average particle sizes of 0.05 to 1000 .mu.m, a density of 1.2 to 2.3 g/cm.sup.3 and a fluorine content of 65 to 76% by weight.