Patent ID: 9670319
Date: 2017-06-06
CPC Classifications: B29C,B29K,B29L,C08G

Claim:
1. A process for preparing a polyamide comprising the repeating unit of formula I below: in which R represents a covalent bond or a divalent hydrocarbon-based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics; the process comprising a polycondensation reaction between: at least one dicarboxylic acid or at least one carboxylic acid diester, at least one dinitrile or at least one acyl dichloride of respective formulae IV, IV′, IV″ and IV″′ below: where R and at least one diamine of formula V below: wherein R represents a covalent bond or a divalent hydrocarbon-based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics.