Flame-resistant and heat-resistant polycarbonate compositions

A molding composition comprising:

• A) 5 to 95 parts by weight relative to 100 parts of the composition of at least one member selected from the group consisting of an aromatic polycarbonate and polyester carbonate,
• B) 1 to 60 parts by weight relative to 100 parts of the composition of at least one graft polymer of
• B.1 5 to 95 wt. % relative to the weight of B) of one or more vinyl monomers on
• B.2 5 to 95 wt. % relative to the weight of B) of one or more graft bases having a glass transition temperature of <10° C.,
• C) 0 to 50 parts by weight relative to 100 parts of the composition of a member selected from the group consisting of a thermoplastic vinyl (co)polymer and thermoplastic poly(alkylene terephthalate)
• D) 0.5 to 25 parts by weight relative to 100 parts of the composition of a mixture of phosphorus compounds represented by the following formulas (I-a) and (I-b)
• wherein independently for each of formulas (I-a) and (I-b),
• X1 and X2 are each independently represented by the following formula (II),
• for which
• A1 denotes a member selected from the group consisting of C1-C2 alkylene, C2-C3 alkylldene, C5-C8 cycloalkylidene, —O—, —SO—, —CO—, —S—, —SO2—, C8-C12 arylene, each optionally condensed with further aromatic rings optionally containing heteroatoms, and a radical of the formula
• or a radical of the formula (IV)
• and where
• B independently of one another denotes C1-C8 alkyl, C8-C10 aryl, C2-C12 aralkyl,
• x is in each case independently of one another 0, 1 or 2,
• p is 1 or 0, and
• R4 and R7 for each Z, independently of one another denote hydrogen or C1-C6 alkyl,
• Z denotes carbon, and
• m denotes an integer from 4 to 7,
• with the proviso that on at least one atom Z, R6 and R7 are simultaneously alkyl
• R1, R2, R3 and R4 independently of one another denote optionally halogenated C1-C8 alkyl or unsubstituted or substituted C5-C6 cycloalkyl, C6-C20 aryl or C7-C12 aralkyl where the substituents are selected from at least one of the group consisting of halogen and C1-C4 alkyl
• n independently of one another denotes 0 or 1,
• q denotes 1 to 30, and
• E) 0.05 to 5 parts by weight of anti-drip agent, with the proviso that the mixture of phosphorous compounds contains at least 1 phosphorus compounds represented by formula (I-a) and at least 1 phosphorous compound represented by formula (I-b), and the phosphorous compounds of formulas (I-a) and (I-b) differ one from the other in at least on of their respective X1, X2, R1, R2, R3 and R4 groups, and wherein the sum of the parts by weight is 100.