| 摘要 |
A flameproof, halogen-free thermoplastic molding material contains, based on the molding material consisting of A, B, C, D and E, (A) 40 to 95% by weight of a thermoplastic halogen-free aromatic polycarbonate based on a diphenol, (B) from 5 to 30% by weight of one or more halogen-free graft polymers obtained from, based on B, (b1) an elastomer (rubber), which accounts for from 40 to 80% by weight, and (b2) a graft shell on this elastomer which accounts for from 20 to 60% by weight, (C) from 5 to 50% by weight of one or more halogen-free thermoplastic copolymers consisting of, based on C, from 50 to 95% by weight of styrene, alpha -methylstyrene, styrene which is substituted in the nucleus, methyl methacrylate or a mixture of these, and from 50 to 5% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleimide or a mixture of these, (D) 1 to 25% by weight of one or more halogen-free phosphorus compounds of the formula <IMAGE> (I) where R1, R2 and R3 independently of one another are each halogen-free C1-C8-alkyl or halogen-free C6-C20-aryl and n is 0 or 1, and (E) from 0.05 to 5% by weight of a tetrafluoroethylene polymer. In the molding material, the elastomer (b1) is prepared by polymerizing a monomer mixture of (b1a1) from 70 to 99.9% by weight, based on b1), of one or more alkyl acrylates where alkyl is of 1 to 8 carbon atoms, (b1a2) from 0 to 30% by weight, based on (b1), of one or more further copolymerizable monoethylenically unsaturated monomers and b1a3) from 0.1 to 5% by weight, based on B1), of a copolymerizable polyfunctional, crosslinking monomer. The molding material is used for the production of shaped articles.
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