MANUFACTURING METHOD OF SEMI-CRYSTALLINE AND SEMI-AROMATIC COPOLYAMIDE USING A SOLID POLYMERIZATION CAPABLE OF RESTRAINING SIDE REACTIONS SUCK DISCOLORATION, CRYSTALLIZATION DUE TO LONG REACTION AT HIGH TEMPERATURE

摘要

PURPOSE: A manufacturing method of semi-crystalline and semi-aromatic copolyamide is provided to improve reaction rate of chain extending reaction and to obtain semi-crystalline and semi-aromatic copolyamide with extremely high molecular weight within very short reaction time.;CONSTITUTION: A manufacturing method of semi-crystalline and semi-aromatic copolyamide comprises: a step of preparing a copolyamide prepolymer comprising an aromatic dicarboxylic acid, aromatic dicarboxylic acid and aliphatic diamine; and a step of increasing the molecular weight of the copolyamide prepolymer through a solid polymerization. The relative viscosity of the copolyamide prepolymer is 1.05 or more. The aromatic dicarboxylic acid is at least one selected from terephthalic acid and isophthalic acid.;COPYRIGHT KIPO 2013