A process for forming an ultra-high molecular weight nylon 6 by polymerizing ε-caprolactam, which comprises heating substantially anhydrous ε-caprolactam at a temperature of from 100 to 200°C in the presence of (a) a main catalyst selected from a Grignard compound and a halogenated magnesium lactamate, (b) a co-catalyst selected from an acyl lactam compound and an isocyanic acid ester and (c) at least one activator selected from the group consisting of amides, sulfoxides, thioethers and phosphoric esters. According to this inventive process, an ultra-high molecular weight nylon 6 can be produced within a short period of time, making use of industrially advantageous compounds which are stable in air, hardly dangerous and inexpensive. Being free from cross-linkings, the ultra-high molecular weight nylon 6 obtained by the process of this invention is soluble in various solvents and is useful as a starting material for the production of high strength and high modulus materials.
一种通过聚合ε-己内酰胺形成超高分子量尼龙 6 的工艺,包括在 100 至 200°C 的温度下,在以下物质存在的情况下加热基本无
水的ε-己内酰胺:(a) 主催化剂,选自格氏化合物和卤代内酰胺
镁、(b) 选自酰基内酰胺化合物和
异氰酸酯的助催化剂,以及 (c) 至少一种选自酰胺、
硫醚、
硫醚和
磷酸酯的活化剂。根据本发明的工艺,可以在短时间内生产出超高分子量尼龙 6,利用的是在空气中稳定、几乎没有危险且价格低廉的工业优势化合物。由于不存在交联,通过本发明工艺获得的超高分子量尼龙 6 可溶于各种溶剂,可用作生产高强度和高模量材料的起始材料。