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:
Nov. 15, 2011
Filed:
Mar. 08, 2007
Hiroshi Uyama, Osaka, JP;
Yinan Yin, Osaka, JP;
Takashi Tsujimoto, Osaka, JP;
Hideo Noda, Hyogo, JP;
Takahiko Terada, Hyogo, JP;
Hiroshi Uyama, Osaka, JP;
Yinan Yin, Osaka, JP;
Takashi Tsujimoto, Osaka, JP;
Hideo Noda, Hyogo, JP;
Takahiko Terada, Hyogo, JP;
Abstract
A star-branched polyester polyol is obtained by polymerizing lactide or lactic acid, using, as an initiator, a fat and oil composed mainly of a triacylglycerol that has at least three hydroxyl groups or epoxy groups in its molecule. This polyester polyol has low crystallinity and a low melting point, and thus shows good working properties when used in various applications. Furthermore, this polyester polyol is derived from renewable resources, and, thus, it is highly desirable in view of its effectiveness in protecting the global environment and preventing fossil resources from being depleted.