Catalyst composition solid at room temperature, based on alkali metal lactamate, characterized in that the content of methanol, ethanol and η-propanol is lower than 0,2 wt.% and that 0.1-5 wt.% of another alcohol is present, chosen from isopropanol or a branched or unbranched aliphatic or aromatic alcohol with 4-18 carbon atoms, which alcohol has a boiling point of 80◊C to 250◊C.
This catalyst composition is suitable for lactam polymerization, especially in RIM techniques.
Nylon block copolymer prepared with said catalyst composition and articles made from this nylon block copolymer.
基于碱
金属内酰胺的催化剂组合物在室温下为固体,其特征在于
甲醇、
乙醇和η-
丙醇的含量低于 0.2 重量%,另一种醇的含量为 0.1-5重量%,该醇选自
异丙醇或具有 4-18 个碳原子的支链或未支链脂肪族或
芳香族醇,该醇的沸点为 80◊C 至 250◊C。
这种催化剂组合物适用于内酰胺聚合,特别是在 RIM 技术中。
使用上述催化剂组合物制备的尼龙嵌段共聚物,以及用这种尼龙嵌段共聚物制成的物品。