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.
本发明涉及一种用芳香族
氨基甲酸酯取代催化热反应中的
异氰酸酯起始原料来制备酰胺或聚酰胺的工艺。通过本发明中涉及非
异氰酸酯前体的催化热工艺,可以显著提高生产酰胺或聚酰胺的效率,并大大减少
异氰酸酯副反应产生的不纯副产品。因此,可以获得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(酰胺或聚酰胺的新型非
异氰酸酯前体)的工艺。