Patent ID: 7507474

Claim:
A thermoplastic polymer composition, comprising: (1) a matrix M based on at least one thermoplastic polymer or copolymer, and (2) at least one hyperbranched polymer additive for modifying the rheological behaviour of said composition, comprising at least one polymer or copolymer: (a) which is functionalized, (b) which is hyperbranched, and (c) at least 50% of the end groups of said hyperbranched polymer or copolymer being functionalized with R 2 , wherein R 2 is a substituted or unsubstituted hydrocarbon-based radical selected from the group consisting of a silicone radical, a linear or branched alkyl radical, an aromatic radical, an alkylaryl radical, an arylalkyl radical and a cycloaliphatic radical, said alkyl or cycloalkyl radical or the alkyl portion of said alkylaryl or arylalkyl radicals optionally having one or more unsaturations and/or one or more hetero atoms, and R 2 is not reactive with the matrix.