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:
Oct. 08, 1991
Filed:
May. 02, 1990
Applicant:
Inventors:
Keiichi Nakatani, Kyoto, JP;
Nobuyasu Nakasugi, Kyoto, JP;
Assignee:
San-Apro Limited, Kyoto, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544235 ;
Abstract
The invention provides a novel compound which is a bis(4-alkyl-substituted piperazinylalkyl) ether such as bis[2-(4-methylpiperazinyl)ethyl] ether and bis[2-(4-ethylpiperazinyl)ethyl] ether. The compound, which can be prepared by the dehydrochlorination reaction between a 1-alkyl-substituted piperazine and a bis(chloroalkyl) ether, is useful as a catalyst for the urethane-forming reaction between a polyisocyanate compound and a polyol compound to give an advantage that a sufficiently long mixing time is available to ensure full uniformity of the reaction mixture before substantial proceeding of the reaction.