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. 29, 1988
Filed:
Mar. 30, 1987
Applicant:
Inventors:
Martin Bartmann, Recklinghausen, DE;
Wilfried Ribbing, Dorsten, DE;
Assignee:
Huls Aktiengesellschaft, Marl, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528216 ; 528212 ; 528214 ; 528215 ;
Abstract
The invention relates to the method of manufacturing polyphenylene ethers by an oxidative coupling reaction of monomeric phenols in a solvent mixture comprised of an aromatic hydrocarbon with 6-8 carbon atoms and an aliphatic alcohol with 1-4 carbon atoms in a volumetric ratio of the hydrocarbon to the alcohol of 92.5:7.5 to 50:50, in the presence of a catalyst comprised of cupric chloride, a secondary diamine, and morpholine.