An improved process for the anionic polymerization of lactams is described. Particular azetidinedione compounds are employed as promoters and their use not only permits low polymerization temperatures but gives rise to faster polymerization reactions than prior art procedures allow.
The rapid polymerization of caprolactam in accordance with the present invention makes the process particularly suited to RIM procedures for preparing molded polyamides.
本发明描述了一种改进的内酰胺阴离子聚合工艺。 本发明采用了特定的
叠氮二酮化合物作为
促进剂,使用这些化合物不仅可以降低聚合温度,而且聚合反应的速度也比现有工艺要快。 本发明中己内酰胺的快速聚合使得该工艺特别适用于制备模塑聚酰胺的 RIM 工艺。