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:
Dec. 17, 1996
Filed:
Jun. 27, 1995
Applicant:
Inventors:
Wen-Fa Lin, Hsinchu, TW;
Yu-Wen Chen, Taipei, TW;
Jih-Chen Huang, Hsinchu, TW;
Hsueh-Ying Chen, Hsinchu, TW;
Assignee:
Industrial Technology Research Institute, Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528417 ; 568617 ; 568621 ; 568623 ; 568624 ; 528421 ;
Abstract
A method for preparing polyether glycol is disclosed. An ester end-capped polyalkylene ether and an alcohol are subjected to alcoholysis at a temperature of 35.degree.-150.degree. C. and a pressure of 1-10 atm in the presence of a mixed metal oxide as a catalyst. The mixed metal oxide includes an alkaline earth metal oxide and at least one component selected from alumina, silica, and zinc oxide.