Thermoplastic moulding materials

Claim 1

Thermoplastic moulding materials containing (A) 98 to 1% by weight of thermoplastic, aromatic polycarbonates with weight-average molecular weights Mw of between 10,000 and 200,000 (Mw determined by Light scattering), (B) 1 to 98% by weight of thermoplastic polyalkylene terephthalates and, (C) 0 to 30% by weight of an elastomeric polymer with a glass transition temperature of less than -20° C. which contains at least two copolymerized monomers selected from the group consisting of chloroprene, butadiene, isoprene, isobutene, styrene, acrylonitrile, ethylene, propylene, vinyl acetate and (methy)acrylic acid esters with 1 to 18 carbon atoms in the alcohol component; and (D) 1 to 30% by weight of a polycarbonate-polyphenylene oxide block co-condensate which contains 5% by weight to 95% by weight, based on the total weight of bifunctional structural units of the block condenstate, of structural units of the formula ##STR11## wherein the radicals R are identical or different and represent hydrogen or an alkyl radical with 1 to 4 carbon atoms, X represents a group R--C--R, --O-- or --SO 2 -- and m and n each represent an integer from 1 to 200, and 95% by weight to 5% by weight, based on the total weight of bifunctional structural units of the block condensate, of other structural units of the ##STR12## wherein --O--Z--O-- is a diphenolate radical which has 6 to 30 carbon atoms; and wherein the sum of the percentages by weight of components (A)+(B)+(C)+(D) in each case being 100% by weight.