公开(公告)号：US3909498A

公开(公告)日：1975-09-30

申请号：US37893873

申请日：1973-07-13

Applicant: STAMICARBON

Inventor： WOLVERS WILHELMUS P ,  WARNIER JEAN M M

IPC: C08G69/00 ,  C08G69/04 ,  C08G69/18

CPC classification number: C08G69/18

Abstract: A process for the preparation of polyamides in granular or powdered form is described, said process comprising heating a lactam or mixture of lactams in a suitable inert solvent at a temperature below the melting point of the polyamide to be formed, in the presence of a conventional anionic catalyst and a conventional promotor. The disclosure points out that the presence during polymerisation of one or more compounds from the group of alcohols, carboxylic esters and inert salts, dissolved or dispersed in the solvent, prevents the formation of lumps and the adhesion of the polyamide to the reactor walls.

Abstract translation: 描述了制备颗粒状或粉末状聚酰胺的方法，所述方法包括在常规的聚酰胺的存在下，在低于待形成的聚酰胺的熔点的温度下，在合适的惰性溶剂中加热内酰胺或内酰胺的混合物 阴离子催化剂和常规的促进剂。 本公开指出，溶解或分散在溶剂中的一种或多种来自醇，羧酸酯和惰性盐的化合物聚合期间的存在防止了团块的形成和聚酰胺粘附到反应器壁上。

公开(公告)号：US3910861A

公开(公告)日：1975-10-07

申请号：US39323073

申请日：1973-08-30

Applicant: STAMICARBON

Inventor： WOLVERS WILHELMUS P ,  FRANSSEN PIERRE J ,  WARNIER JEAN M M

IPC: C08G69/20 ,  C08J3/12 ,  C08G69/18

CPC classification number: C08J3/12 ,  C08G69/20 ,  C08J2377/02

Abstract: A one step process for the preparation of granular or powdery polyamides having a novel combination of high specific density and relative viscosity, along with narrow particle size distribution and low water extractable content, but with a wide molecular weight distribution, is described wherein the polymerization process is carried out in an inert solvent, in which the lactam monomers are substantially soluble but polyamide product is substantially insoluble, and at a temperature below the melting point of the polyamide to be formed, and wherein the essential promoter employed is bis- Epsilon -caprolactimether.

Abstract translation: 描述了制备具有高比密度和相对粘度的新型组合以及窄的粒度分布和低的可提水含量但具有宽的分子量分布的颗粒或粉末状聚酰胺的一步法，其中聚合过程 在惰性溶剂中进行，其中内酰胺单体基本可溶，但是聚酰胺产物基本上不溶，并且在低于要形成的聚酰胺的熔点的温度下进行，并且其中使用的必需促进剂是双ε-己内酰胺醚 。