METHOD FOR PRODUCING AMIDES OR POLYAMIDES BY USING AROMATIC CARBAMATES BY WAY OF ISOCYANATES AS PRECURSORS THROUGH CATALYZED THERMAL PROCESSES AND METHOD FOR PRODUCING AROMATIC CARBAMATE PRECURSORS FROM AROMATIC AMINES
申请人:Great Eastern Resins Industrial Co., Ltd.
公开号:US20180186731A1
公开(公告)日:2018-07-05
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。