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:
Apr. 17, 2007
Filed:
Sep. 29, 2004
Hugo Gerard Eduard Ingelbrecht, Essen, BE;
Alexey Kruglov, Glenmont, NY (US);
Gert-jan Schoenmakers, Prinsenbeek, NL;
Hugo Gerard Eduard Ingelbrecht, Essen, BE;
Alexey Kruglov, Glenmont, NY (US);
Gert-Jan Schoenmakers, Prinsenbeek, NL;
General Electric Company, Schenectady, NY (US);
Abstract
A method for preparing a poly(arylene ether) with a reduced level of powder fines is described. In one embodiment, the method comprises oxidatively coupling a monohydric phenol in the presence of a solvent and a complex metal catalyst, to produce a poly(arylene ether) resin; and then removing a portion of the solvent to produce a concentrated solution having a cloud point T. The concentrated solution is then combined with an anti-solvent to precipitate the poly(arylene ether) in the form of a precipitation mixture. The concentrated solution usually has a temperature of at least about (T−10° C.) immediately before it is combined with the anti-solvent. The precipitation mixture has a temperature of at least about (T−40° C.) after its formation. Related poly(arylene ether) copolymers are also described.