Halogen-free flameproof thermoplastic moulding materials

摘要

The present invention relates to halogen-free flameproof thermoplastic molding compounds which comprise an aromatic polycarbonate, a styrene-containing copolymer, a styrene-containing graft polymer, a phosphorus compound, a silicon compound, and a tetrafluoroethylene polymer. It has been found that the use of a specific type of silicon compound leads to a polymer mixture having improved stress crack resistance and impact properties. The silicon compound is represented as the following General Formula (1). General Formula ( I ): <CHEM> in which n and m have a value of from 5 to 8, and x and y have a value of from 1 to 5.