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:
Apr. 17, 1984
Filed:
Nov. 30, 1982
Applicant:
Inventors:
Yoshio Kamatani, Osaka, JP;
Noriaki Fujita, Osaka, JP;
Assignee:
Takeda Chemical Industries, Inc., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544 67 ;
Abstract
Polyisocyanates having oxadiazinetrione rings obtained by reacting bis(isocyanatomethyl)cyclohexane, an oligomer thereof, an adduct thereof or a mixture of them with carbon dioxide. Said polyisocyanates have excellent properties as raw materials for the production of polyurethanes, because of their higher reactivity at lower temperature and better storage stability.