SOLID PHASE POLYMERIZATION PROCESS OF POLYAMIDE

摘要

PROBLEM TO BE SOLVED: To provide a preparation process of a polyamide in which a polyamide is obtained by a solid phase polymerization using a batch heating apparatus, the quality variance of the polyamide in the same batch can be reduced and the solid phase polymerization of the polyamide can be carried out very effectively. SOLUTION: In this solid phase polymerization process of a polyamide, a polyamide obtained by melt polycondensation of metaxylylenediamine and adipic acid is polymerized by a solid phase polymerization using a batch heating apparatus, the product is transferred in nitrogen atmosphere, to a cooling apparatus and cooled in a specific cooling rate.