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:
May. 30, 2000
Filed:
Apr. 20, 1999
Applicant:
Inventors:
Martin Bruck, Weilrod, DE;
Andreas Schleicher, Beselich, DE;
Assignee:
Ticona GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08J / ; C08F / ;
U.S. Cl.
CPC ...
521 43 ; 526 67 ; 526 68 ; 526 69 ; 528491 ; 528493 ; 528497 ;
Abstract
The present invention relates to a process for obtaining polyarylene sulfide from polyarylene sulfide-containing material. For this purpose, the polyarylene sulfide-containing material is treated with a solvent in which it dissolves, and is subsequently reprecipitated. The invention also relates to the purification of polyarylene sulfide-containing material by separating off extraneous substances, to polyphenylene sulfide particles having a specific surface area of at least 80 m.sup.2 /g and to their use as filter material.