Patent ID: 8263716

Claim:
A thermoplastic molding composition comprising: A) from 10 to 99.99% by weight of at least one thermoplastic polyester; B) from 0.01 to 20% by weight of a hyperbranched A x B y polyester, wherein A x and B y are different monomers and indices x and y are the number of functional groups present in A and B, wherein x is at least 1.1 and y is at least 2.1, wherein B) has an OH number (DIN 53240) of from 0 to 600 mg KOH/g and a COOH number (to DIN 53240) of from 0 to 600 mg KOH/g, wherein B) has a glass transition temperature T g of from −50° C. to 140° C., wherein a degree of branching of B) is from 10 to 99.9%, and wherein B) has both structural and molecular non-uniformity, C) from 0 to 60% by weight of other additives, where the total of the percentages by weight of components A) to C) is 100%.