Method for producing copolymerized polyamide

• Main Authors: MIYAZAKI TAKAMASA, DOI TAKASHI, ABE MASANORI, FUJII HIROYUKI, YAMAGUCHI HISAYA, MAKIHARA YASUHISA, KURACHI, KOUICHIROU, TSUJIMOTO CHIKI, LIN ZHECHONG
• Format: Patent
• Language: Chinese; English
• Published: 15.04.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The present invention relates to a method for producing a copolymerized polyamide, which is capable of efficiently obtaining a copolymerized polyamide having good quality, and which comprises the following first step and second step. A first step: a step for preparing a mixed solution by adding solid adipic acid (B) to liquid epsilon-caprolactam (A) and mixing epsilon-caprolactam (A) and adipic acid (B) at a temperature of 69 DEG C or more and less than 115 DEG C to prepare a mixed solution in which the amount of epsilon-caprolactam (A) used is 1-20 moles per 1 mole of adipic acid (B); and a second step for obtaining a copolymerized polyamide by mixing the mixed solution obtained in the first step with hexamethylenediamine (C) and then reacting the mixture with the hexamethylenediamine (C). 本发明涉及共聚聚酰胺的制造方法，其能够有效地获得品质良好的共聚聚酰胺，且包括下述的第一工序和第二工序。第一工序：将ε-己内酰胺(A)与己二酸(B)以69℃以上且低于115℃进行混合，从而制备混合液的工序，其中，向液态的ε-己内酰胺(A)中添加固态的己二酸(B)，进行ε-己内酰胺(A)与己二酸(B)的混合，制备ε-己内酰胺(A)的用量相对于己二酸(B)1摩尔为1～20摩尔的混合液；第二工序：将通过第一工序而得到的混合液与六亚甲基二胺(C)混合