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. 19, 2010
Filed:
Sep. 07, 2005
Applicants:
Hiroyuki Nishide, Tokyo, JP;
Kei Saito, Tokyo, JP;
Inventors:
Hiroyuki Nishide, Tokyo, JP;
Kei Saito, Tokyo, JP;
Assignee:
Waseda University, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 65/38 (2006.01); C08G 2/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for preparing polyphenylene ether by oxidizing phenols using water as a solvent, enabling polyphenylene ether to be prepared with only a small amount of oxidizer, while making it possible to reuse a solvent after reaction repeatedly. Water is used as the solvent. Phenols are oxidized under the presence of a water-soluble metal complex catalyst. For the water-soluble metal complex catalyst, it is preferable to use the one whose central metal is copper or manganese, having an amine multidentate ligand.