| 摘要 |
PROBLEM TO BE SOLVED: To provide a high molecular weight polyamide resin which contains pentamethylene diamine and an aliphatic dicarboxylic acid as main constitutive components, is produced industrially, and has little content of piperidine. SOLUTION: In a method for producing the polyamide resin, comprising polycondensating monomers containing pentamethylene diamine and an aliphatic dicarboxylic acid or its salt, as main constitutive components, the highest achievable pressure is set to be lower than 1.0 MPa (10 kg/cm<SP>2</SP>), and the heating temperature is set to be higher than the melting point of the polyamide resin. COPYRIGHT: (C)2011,JPO&INPIT |
