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. 06, 2001
Filed:
Nov. 23, 1999
Shien Chang Chen, Taipei, TW;
Fu Shen Lin, Ta She Industrial Zone Kaohsiung, TW;
June Yen Chou, Ta Hwa Industrial Zone Kaohsiung, TW;
Liang An Hsu, Ta She Industrial Zone Kaohsiung, TW;
Ming Hui Chu, Ta She Industrial Zone Kaohsiung, TW;
Chine Chung Huang, Ta Hwa Industrial Zone Kaohsiung, TW;
Ming Hsiung Shao, Ta She Industrial Zone Kaohsiung, TW;
Dairen Chemical Corporation, Taipei, TW;
Abstract
The present invention is related to a method for preparing polyether polyol or copolymerized polyether polyol, which uses an acid catalyst consisting of heteropoly acidic salts and oxides and/or binders. It allows tetrahydrofuran and/or cyclic ether compounds to carry out the ring-opening polymerization or ring-opening copolymerization with/without telogen, and obtains polyether polyol or copolymerized polyether polyol. An acid catalyst is used in the present invention because of its low solubility in organic solvent, so its process is simpler and the catalyst is easy to recycle for repeated use. As well, its preparation process is highly advantageous.