Flame retardant moulding composition.

摘要

A moulding composition containing, based on the total amount of A to E,

  A: 40-90% by weight of a halogen-free polycarbonate A,
  B: 5-40% by weight of at least one halogen-free graft polymer B built up from, based on B,

  B1: 40-80% by weight of an elastomer B1 having a glass transition temperature of below 0 DEG C,
  B2: 20-60% by weight of a graft shell B2 comprising, based on B2,

  B21: 40-98% by weight of styrene, alpha -methylstyrene, ring-substituted styrene and/or C1-C8-alkyl (meth)acrylate,
  B22: 50-1% by weight of (meth)acrylonitrile and/or maleic anhydride,
  B23: 1-50% by weight of an organic phosphorus compound of the formula (I)

in which

  R<1> is H or CH3,
  R<2> and R<3> are each, independently of one another, halogen-free C1-C8-alkyl or halogen-free C6-C20-aryl which is optionally substituted by halogen-free substituents,
  X<1>, X<2> and X<3> are O, S or NR (where R is hydrogen or halogen-free C1-C8-alkyl), and
  n is from 0 to 10,



  C: 5-40% by weight of a halogen-free, thermoplastic copolymer C comprising, based on C,

  C1: from 50 to 95% by weight of styrene, alpha -alkylstyrene, ring-substituted styrene and/or C1-C8-alkyl (meth)acrylate (C1),
  C2: from 4 to 50% by weight of (meth)acrylonitrile C1-C8-alkyl (meth)acrylate and/or maleic anhydride (C2),
  C3: from 1 to 46% by weight of a halogen-free phosphorus compound of the formula (I),

  D: up to 20% by weight of a halogen-free phosphorus compound of the formula (II)

in which R<1>, R<2> and R<3> are each, independently of one another, halogen-free C1-C8-alkyl or halogen-free, unsubstituted or substituted C6-C20-aryl
  E: up to 5% by weight of a tetrafluoroethylene polymer having a mean particle size of from 0.05 to 20 mu m.