- 专利标题： 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
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申请号： US15653591申请日： 2017-07-19
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公开(公告)号： US10450265B2公开(公告)日： 2019-10-22
- 发明人: Shenghong A. Dai , Ching Hsuan Lin , Jung-Yang Yang
- 申请人： Great Eastern Resins Industrial Co., Ltd.
- 申请人地址： TW Taichung
- 专利权人： Great Eastern Resins Industrial Co., Ltd.
- 当前专利权人： Great Eastern Resins Industrial Co., Ltd.
- 当前专利权人地址： TW Taichung
- 代理机构： Drinker Biddle & Reath LLP
- 优先权： TW105143958A 20161229
- 主分类号： C07C269/04
- IPC分类号： C07C269/04 ; C08G69/00 ; C07C263/04 ; C07C267/00 ; C07C273/18 ; C07C231/10 ; C08G69/04 ; C08G69/26 ; C08G69/28 ; C08G69/32
摘要：
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.
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