Patent ID: 8877888

Claim:
A polyamide obtained by the polycondensation of a mixture of: a) monomers of the following general formula (I): b) monomers of the following general formulae (IIa) and (IIb): and c) monomers of the following general formula (III): Z—R 3 —Z (III) in which: R 1 is a linear or cyclic, aromatic or aliphatic, hydrocarbon radical which comprises at least two carbon atoms and which can comprise heteroatoms, A is a covalent bond or an aliphatic hydrocarbon radical comprising 1 to 6 carbon atoms, Z is a primary amine radical or a carboxyl group, R 2 and R 3 , which are identical or different, are each aliphatic, cycloaliphatic or aromatic hydrocarbon radicals which comprise from 2 to 20 carbon atoms and which can comprise heteroatoms, X is a carboxyl radical or a primary amine radical; and Y is a primary amine radical when X is a carboxyl radical, or Y is a carboxyl radical when X is a primary amine radical, m is an integer ranging from 3 to 8, the molar concentration of the monomers of formula (I) in the mixture of monomers of general formulae (I), (IIa) and (IIb) being from 0.01% to 1%, and the molar ratio of the monomers of formula (I) to the monomers of formula (III) being from 0.01 to 0.4, and the molar concentration of monomers of formula (III) is from 0.1% to 2% in the mixture of monomers (III), (IIa), and (IIb).