Patent ID: 8252872

Claim:
A polymer material composed of macromolecular chains linked via reversible hydrogen bonds, in which: the macromolecular chains are composed of a polymer backbone to which one or more modifying agents are attached via at least one covalent bond, wherein said polymer backbone is a polyamide, each modifying agent comprises, combined in the same molecule, one or more associative groups capable of uniting via hydrogen bonds and one or more reactive groups capable of forming covalent bonds with the polymer backbone, at least one of the associative groups of each modifying agent is a heterocycle of innidazolidone type, the macromolecular chains carry, on average, 1 to 10 imidazolidone groups per chain, wherein the modifying agents have the general formula: in which: R denotes a halogen or a primary or secondary amine, alcohol, thiol, aldehyde, ketone, carboxylic acid or derivative, sulfonic acid or derivative, isocyanate or epoxy group, X denotes a rigid or flexible chain selected from the group consisting of a hydrocarbon chain containing one or more heteroelements, a linear or branched alkyl chain composed of 1 to 30 carbon atoms, and a ring or a sequence of alkyl or aryl units linked via —C(O)O—, OC(O), —C(O)NH—, —NHC(O)—, C(O), —O—, —S— or —NH— bridges, wherein the material comprises at least two different polymer backbones, each carrying one or more modifying agents.