Patent ID: 6872800

Claim:
Hyperbranched copolyamide obtainable by reaction between: at least one monomer of formula (I) below: A—R—B f (I) in which A is a polymerization-reactive functional group, B is a polymerization-reactive functional group capable of reacting with A, R is a carbon-containing species which optionally includes heteroatoms and f is the total number of reactive functions B per monomer: f≧2; and at least one difunctional monomer of formula (II) below: (II) A′—R′—B′ or the corresponding lactams, in which A′, B′ and R′ have the same definition as that given above for A, B and R, respectively, in formula (I); wherein the I/II molar ratio is defined as follows: 0.05<I/II; and in that at least one of the species R or R′ of at least one of the monomers (I) or (II) is aliphatic, cycloaliphatic or arylaliphatic.