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:
Jul. 11, 2017
Filed:
May. 23, 2013
Applicant:
Nippon Soda Co., Ltd., Tokyo, JP;
Inventors:
Akihiro Shirai, Tokyo, JP;
Yasunori Miyashita, Joetsu, JP;
Shinichi Kimizuka, Ichihara, JP;
Mitsuhiro Nakamura, Ichihara, JP;
Assignee:
NIPPON SODA CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/66 (2006.01); C08G 18/42 (2006.01); C08G 18/10 (2006.01); C08G 18/76 (2006.01); C08G 18/69 (2006.01);
U.S. Cl.
CPC ...
C08G 18/4277 (2013.01); C08G 18/10 (2013.01); C08G 18/4275 (2013.01); C08G 18/664 (2013.01); C08G 18/69 (2013.01); C08G 18/694 (2013.01); C08G 18/7621 (2013.01);
Abstract
A polybutadiene having a hydroxyl group at a terminal end thereof is reacted with a lactone compound such as an ε-caprolactone to obtain a polymer polyol represented by formula (I): HO—X—Y—X—OH (wherein Xand Xeach independently represents a polyester component and Y represents a polybutadiene component), the polymer polyol is reacted with an unsymmetric diisocyanate to obtain a urethane prepolymer, and then the urethane prepolymer is reacted with a chain extender to obtain a polyurethane.