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. 29, 2011
Filed:
Mar. 26, 2010
Hiroki Yoshioka, Kanagawa, JP;
Takashi Matani, Kanagawa, JP;
Shuichi Yoshimura, Kanagawa, JP;
Kazuhiro Hashimoto, Kanagawa, JP;
Hiroki Yoshioka, Kanagawa, JP;
Takashi Matani, Kanagawa, JP;
Shuichi Yoshimura, Kanagawa, JP;
Kazuhiro Hashimoto, Kanagawa, JP;
NOF Corporation, Tokyo, JP;
Abstract
A method for producing a polyoxyalkylene derivative including: step (A) in which a polyoxyalkylene derivative having hydroxyl group(s) is reacted with a phthalimide derivative in the presence of an azo reagent and a phosphine reagent; step (B) in which the phthalimide groups of the compound obtained in step (A) are deprotected using a compound having a primary amino group; and step (C) in which impurities derived from the phthalimide derivative and the deprotection reagent are removed by adsorption or extraction.