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. 05, 1996
Filed:
May. 03, 1994
Applicant:
Inventors:
Dietrich Fleischer, Darmstadt, DE;
Heinz Strutz, Usingen, DE;
Ju/ rgen Kulpe, Frankfurt am Main, DE;
Andreas Schleicher, Einhausen, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08F / ;
U.S. Cl.
CPC ...
528373 ; 528388 ; 528480 ; 528486 ; 528489 ;
Abstract
Process for preparing a polyarylene sulfone by oxidizing a polyarylene thioether in acetic acid with hydrogen peroxide, the reaction being carried out in the presence of catalytic amounts of concentrated sulfuric acid and/or with the addition of equilibrium per-acids. The reaction products are suitable for producing molded parts having high temperature resistance and high resistance to chemicals.