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:
Sep. 19, 1989
Filed:
Aug. 24, 1987
Kenji Nagaoka, Osaka, JP;
Yoshiharu Tatsukami, Osaka, JP;
Masahiro Fujiwara, Osaka, JP;
Katsuhiro Abe, Mie, JP;
Kazunori Yano, Mie, JP;
Ryuhei Matsui, Mie, JP;
Sumitomo Chemical Company, Osaka, JP;
Mitsubishi Petrochemical Company, Tokyo, JP;
Abstract
A process for producing a plyphenylene oxide is disclosed, comprising oxidative polymerization of a nucleus-substituted phenol with an oxygen-containing gas in an organic solvent in the presence of a catalyst system comprising a manganese compound containing at least one divalent manganese salt, at least one basic compound selected from hydroxides, alkoxides or phenoxides of the group IA metals of the Periodic Table and hydroxides or oxides of the group IIA metals of the Periodic Table, an alkanolamine represented by formula (I)