Free flowing polyester molding composition

An injection molding composition comprising:

• I. from 0.1 to 20 parts by weight of a polyamine-polyamide graft copolymer which is prepared using the following monomers:
• a) from 0.5 to 25% by weight, based on the graft copolymer, of a branched polyamine having at least 4 nitrogen atoms and a number-average molar mass Mn of at least 146 g/mol, and
• b) polyamide-forming monomers selected from the group consisting of lactams, ω-aminocarboxylic acids, and equimolar combinations of diamine and dicarboxylic acid;
• and
• II. from 80 to 99.9 parts by weight of a thermoplastic polyester, where the total of the parts by weight of I and II is 100.

A molding composition comprising:

• A. from 40 to 99.5% by weight of a mixture made from
• I. from 0.1 to 20 parts by weight of a polyamine-polyamide graft copolymer which is prepared using the following monomers:
• a) from 0.5 to 25% by weight, based on the graft copolymer, of a branched polyamine having at least 4 nitrogen atoms and a number-average molar mass Mn of at least 146 g/mol, and
• b) polyamide-forming monomers selected from the group consisting of lactams, ω-aminocarboxylic acids, and equimolar combinations of diamine and dicarboxylic acid, and
• II. from 80 to 99.9 parts by weight of a thermoplastic polyester, where the total of the parts by weight of I and II is 100;
• and
• B. from 0.5 to 60% by weight of at least one particulate, laminar or fibrous additive selected from the group consisting of fillers, pigments, reinforcing materials, additives which give the molding composition antistatic properties or electrical conductivity, nucleating agents, and particulate flame retardants.