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:
Mar. 14, 2006
Filed:
Jul. 21, 2004
Kazuhiko Yamada, Kanagawa, JP;
Nobuyuki Kasahara, Kanagawa, JP;
Yoshinori Toyota, Kanagawa, JP;
Chitoshi Suzuki, Ibaraki, JP;
Shigeru Ikai, Ibaraki, JP;
Hiroshi Hatano, Tokyo, JP;
Kazuhiko Yamada, Kanagawa, JP;
Nobuyuki Kasahara, Kanagawa, JP;
Yoshinori Toyota, Kanagawa, JP;
Chitoshi Suzuki, Ibaraki, JP;
Shigeru Ikai, Ibaraki, JP;
Hiroshi Hatano, Tokyo, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A method for precisely producing a polyether having a relatively high molecular weight by means of a double metal cyanide complex catalyst is provided. A method for continuously producing a polyether, which comprises ring opening addition polymerization of an alkylene oxide in the presence of a double metal cyanide complex catalyst, wherein substantially no vapor phase part is present in a reactor.