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. 22, 1981
Filed:
Aug. 14, 1980
Applicant:
Inventors:
Kazurou Komatsu, Hyuga, JP;
Sojiro Matsumoto, Hyuga, JP;
Takeshi Maniwa, Hyuga, JP;
Nobuyuki Shinmura, Hyuga, JP;
Assignee:
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
2604 / ; 2604 / ; 2604 / ; 2604 / ;
Abstract
A process for the continuous production of a polyisocyanate by reacting an organic diisocyanate with an adduct-producing agent that reacts with an isocyanato group to form an intermediate product having a urea bond and a gas is disclosed wherein the initial stage of the reaction is performed in one or two continuous complete mixing type reactors until the amount of gas generated is at least about 80% of the amount of gas to be generated during the entire reaction and the subsequent stage of the reaction is performed in a plug flow reactor.