| abstract |
The invention relates to thermoplastic molding materials comprising A) from 10 to 69% by weight of a thermoplastic polyester, B) from 30 to 79% by weight of an aluminum oxide, C) from 0.01 to 10% by weight of an organic or inorganic acid or mixtures thereof, D) from 0 to 10% by weight of D1) at least one highly branched or hyperbranched polycarbonate having an OH number of from 1 to 600 mg KOH/g of polycarbonate (to DIN 53240, part 2) or D2) at least one highly branched or hyperbranched polyester of the AxBy type where x is at least 1.1 and y is at least 2.1 or mixtures thereof, E) from 0 to 50% by weight of further additives, where the sum of the percentages by weight of components A) to E) adds up to 100%. |