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:
Aug. 05, 1997
Filed:
Sep. 23, 1996
Applicant:
Inventors:
Michie Ishii, Osaka, JP;
Amane Mochizuki, Osaka, JP;
Assignee:
Nitto Denko Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560359 ; 560338 ; 560345 ;
Abstract
Novel aromatic diisocyanate and a method of producing the same. The method comprises reacting a diamine compound with a chloroformate to produce an urethane intermediate, and then reacting the urethane intermediate with a halogenated organosilicon compound or a halogenated organoboron compound, using an organic solvent capable of dissolving both the diamine compound and the urethane intermediate. This method enables to produce the aromatic diisocyanate by one-pot. The aromatic diisocyanate has excellent various properties such as high heat resistance and chemical resistance.