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.:
Date of Patent:
Sep. 21, 1993
Filed:
Jan. 07, 1992
Applicant:
Inventors:
Tadayuki Hosogane, Yokohama, JP;
Hiroshi Nakajima, Sawa, JP;
Assignee:
Showa Highpolymer Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 49 ; 528 73 ; 528 75 ; 525419 ; 548420 ; 560225 ; 564 50 ; 564315 ; 564305 ;
Abstract
Aromatic polyamide oligomers containing polymerizable unsaturated groups are prepared by heating and reacting together an aromatic diisocyanate, an aromatic dicarboxylic acid and an unsaturated compound capable of reacting with the aromatic diisocyanate. The aromatic polyamide oligomers thus obtained have excellent molding processability and are useful as raw materials for thermosetting polyamides with enhanced mechanical strength and chemical stability at higher temperatures. The compositions comprising the aromatic polyamide oligomers and maleimide derivatives, further produce cured molded bodies with excellent heat resistance.