SCHLAGZAEHE POLYESTER- UND POLYAMIDFORMMASSEN

Thermoplastic moulding material of the following composition (I): (A) 30 to 97 weight % of a thermoplastic polyester or polyamide or of a mixture of said polymers, whereby said polymers or their mixture have a viscosity index greater than 165; (B) 3 to 40 weight % of an olefin polymerizate, comprised of (b1) 40 to 100 weight % of at least one alpha -olefin with 2 to 8 atoms of C, (b2) 0 to 50 weight % of a diene, (b3) 0 to 45 weight % of a primary or secondary C1 to C12 acrylic acid or methacrylic acid alkylester or mixtures of such esters, (b4) 0 to 40 weight % of an ethylenically unsaturated monocarboxylic or bicarboxylic acid and/or a functional derivative of such an acid, (b5) 0 to 40 weight % of a monomer containing epoxy groups, with the provision that the component (B) is not an olefin homopolymerizate and that it has a gel content no greater than 50 %; (C) 0 to 60 weight % of fillers in fibre or particle form, or mixtures thereof; and (D) 0 to 40 % of a flame protection agent; or of the following composition (II): (A) 20 to 99 weight % of a thermoplastic polyester or polyamide or of a mixture of said polymers; (D) 1 to 40 weight % of a flame protection agent; (B) 0 to 20 % of an olefin polymerizate; and (C) 0 to 60 weight % of fillers in fibre or particle form or mixtures thereof. Said thermoplastic moulding materials can be produced by thermal treatment of mixtures of a type (A) component (component A'), whose viscosity index is lesser than 160, with the remaining components, at temperatures between 60 DEG C below and 60 DEG C above the melting point of the pure component (A).