IDiyas

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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10450265 B1

PDFFull Text
Date of Patent:
Oct. 22, 2019

Filed:

Jul. 19, 2017

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

Applicant:

Great Eastern Resins Industrial Co., Ltd., Taichung, TW;

Inventors:

Shenghong A. Dai, Taichung, TW;

Ching Hsuan Lin, Taichung, TW;

Jung-Yang Yang, Taichung, TW;

Assignee:

Great Eastern Resins Industrial Co., Ltd., Taichung, TW;

Attorney:

Drinker Biddle & Reath LLP

Primary Examiner:

Kuo Liang Peng

Int. Cl.
CPC ...
C07C 269/04 (2006.01); C08G 69/00 (2006.01); C07C 263/04 (2006.01); C07C 267/00 (2006.01); C07C 273/18 (2006.01); C07C 231/10 (2006.01); C08G 69/04 (2006.01); C08G 69/26 (2006.01); C08G 69/28 (2006.01); C08G 69/32 (2006.01);
U.S. Cl.
CPC ...
C07C 269/04 (2013.01); C07C 231/10 (2013.01); C07C 263/04 (2013.01); C07C 267/00 (2013.01); C07C 273/1809 (2013.01); C08G 69/00 (2013.01); C08G 69/04 (2013.01); C08G 69/26 (2013.01); C08G 69/28 (2013.01); C08G 69/32 (2013.01);
Abstract

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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