Flame-resistant polycarbonate ABS moulding materials

A thermoplastic moulding composition consisting of:

• A) 40 to 99 parts by weight of at least one of aromatic polycarbonate and polyester carbonate;
• B) 0.5 to 60 parts by weight of a graft polymer prepared from,
• B.1) 5 to 95 wt. % of one or more vinyl monomers, and
• B.2) 95 to 5 wt. % of one or more particulate diene rubbers having a glass transition temperature of <10° C., which are produced by emulsion polymerisation,
• said graft polymer being prepared by means of a graft polymerisation in the presence of an initiator system comprising an organic hydroperoxide and ascorbic acid, said graft polymerisation having a grafting yield of >60 wt. %;
• C) 0 to 45 parts by weight of at least one thermoplastic polymer selected from the group consisting of thermoplastic vinyl (co)polymers and polyalkylene terephthalates;
• D) 0.1 to 50 parts by weight of at least one component selected from the group consisting of phosphazenes represented by the following formulae,
• in which
• R is in each case identical or different and denotes amino, C1 to C8 alkyl, in each case optionally halogenated, or C1 to C8 alkoxy, C5 to C6 cycloalkyl, C6 to C20 aryl, C6 to C20 aryloxy, or C7 to C12 aralkyl, in each case optionally substituted by alkyl and/or halogen,
• k denotes 0 or a number from 1 to 15;
• E) 0 to 5 parts by weight of fluorinated polyolefin;
• and
• F) optionally at least one additive selected from the group consisting of lubricants, mould release agents, nucleating agents, anti-static agents, stabilisers, dyes and pigments.