The present invention is directed to a process for preparing amides or polyamides by replacing isocyanate starting materials of a catalyzed thermal reaction with aromatic carbamates. Through the catalyzed thermal process involving a non-isocyanate precursor of the present invention, efficiency for producing amides or polyamides can be significantly improved, and the impure side products produced from a side reaction of isocyanate can be greatly curtailed. Hence, amides or polyamides of high purity and yield can be achieved. The invention also relates to a process for preparing aromatic carbamates, the new non-isocyanate precursors for amides or polyamides.
本发明涉及一种通过用芳香族
氨基甲酸酯替换催化热反应的
异氰酸酯起始材料来制备酰胺或聚酰胺的方法。通过本发明的非
异氰酸酯前体参与的催化热过程,可以显着提高生产酰胺或聚酰胺的效率,并且可以大大减少
异氰酸酯的副反应产生的不纯副产物。因此,可以实现高纯度和高产率的酰胺或聚酰胺。本发明还涉及一种制备芳香族
氨基甲酸酯的方法,这是用于制备酰胺或聚酰胺的新的非
异氰酸酯前体。