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. 28, 2014
Filed:
Oct. 02, 2009
Toshihide Yamamoto, Yokkaichi, JP;
Yoshiaki Inoue, Yokkaichi, JP;
Toshihide Yamamoto, Yokkaichi, JP;
Yoshiaki Inoue, Yokkaichi, JP;
Tosoh Corporation, Shunan-Shi, JP;
Abstract
To provide a catalyst composed of a salt of a phosphazenium cation and an active hydrogen compound anion, which can be easily synthesized, does not contain metal components at all, and does not leave any odor on a resulting product; a method for its production; an economical and efficient method for producing a polyalkylene oxide by means thereof; and a salt of a phosphazenium cation and an active hydrogen compound anion, represented by the following formula (2): [in the above formula (2), each of Rand Rwhich are independent of each other, is a Calkyl group, an unsubstituted or substituted Cphenyl group, or an unsubstituted or substituted Cphenylalkyl group, provided that Rand R, or R's, may be bonded to each other to form a ring structure, n is a real number of from 1 to 8, and Yis an anion of an active hydrogen compound which is obtained by removing n protons from an active hydrogen compound Y] is used as a polyalkylene glycol producing catalyst.