公开(公告)号：US20160002402A1

公开(公告)日：2016-01-07

申请号：US14769321

申请日：2014-03-04

Applicant: NAGASE CHEMTEX CORPORATION

Inventor： Tsutomu YASUI

IPC: C08G69/20

CPC classification number: C08G69/20 ,  C08G69/18 ,  C08L77/02 ,  C08L79/00

Abstract: Provided is a method for manufacturing nylon 6, said method being capable of producing a higher degree of crystallinity in a polymer at the end of a polymerization step performed on an anionically polymerizable caprolactam melt. The present invention is a method in which molten caprolactam in a reactor is anionically polymerized in the presence of a carbodiimide compound and both an anionic polymerization catalyst and an activator, neither of which is a carbodiimide compound, and a polymer is obtained from the reactor following the end of the polymerization step, yielding nylon 6 with a degree of crystallinity of at least 42% without raising the temperature of the interior of the reactor from the temperature thereof at the end of the polymerization step.

Abstract translation: 本发明提供一种制备尼龙6的方法，所述方法能够在对阴离子聚合的己内酰胺熔体进行的聚合步骤结束时在聚合物中产生较高的结晶度。 本发明是一种方法，其中反应器中的熔融己内酰胺在碳二亚胺化合物和阴离子聚合催化剂和活化剂两者都是阴离子聚合的，二者都不是碳二亚胺化合物，聚合物是从反应器中获得的 在聚合步骤结束时，在聚合步骤结束时，不会使反应器内部的温度从其温度升高，得到结晶度至少为42％的尼龙6。