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:
Jan. 30, 2007
Filed:
Aug. 26, 2005
Chitoshi Suzuki, Ibaraki, JP;
Hiroki Fukuda, Ibaraki, JP;
Yoshinori Toyota, Ibaraki, JP;
Shigeru Ikai, Ibaraki, JP;
Hideo Sakurai, Ibaraki, JP;
Chitoshi Suzuki, Ibaraki, JP;
Hiroki Fukuda, Ibaraki, JP;
Yoshinori Toyota, Ibaraki, JP;
Shigeru Ikai, Ibaraki, JP;
Hideo Sakurai, Ibaraki, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
Provided is a double metal cyanide complex catalyst with a high activity which is readily produced on an industrial scale. The double metal cyanide complex catalyst is of a fine particle form and contains t-butyl alcohol or, t-butyl alcohol and another organic compound as an organic ligand. The catalyst of the fine particle form has a volume-average particle size in a range of from 3 to 20 μm, based on measurement by a light scattering method for measuring fine particles having particle sizes of at least 0.15 μm. A particle content of the catalyst in a particle size range of at least 0.15 μm and at most 1 μm is less than 5% by volume, and a particle content of the catalyst over a particles size of 1 μm is in a range of more than 95% and at most 100% by volume.