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:
Feb. 14, 2006
Filed:
Oct. 20, 2001
Thomas Guth, Schelklingen, DE;
Jürgen Pawlik, Frankfurt, DE;
Reiner Tiefenstädter, Rosbach, DE;
Peter Brendel, Weilrod, DE;
Frauke Jordt, Eppstein, DE;
Thomas Guth, Schelklingen, DE;
Jürgen Pawlik, Frankfurt, DE;
Reiner Tiefenstädter, Rosbach, DE;
Peter Brendel, Weilrod, DE;
Frauke Jordt, Eppstein, DE;
PEMEAS GmbH, , DE;
Abstract
The present invention relates to a method of preparing a solution of a polymer comprising recurring azole units, which comprises dissolving a sufficiently dried polymer comprising recurring azole units of the formulawhere the radicals Ar, Arand Arare tetravalent, divalent or trivalent aromatic or heteroaromatic groups and the radicals X, which are identical within a repeating unit, are each an oxygen atom, a sulfur atom or an amino group bearing a hydrogen atom, a group having 1–20 carbon atoms, preferably a branched or unbranched alkyl or alkoxy group, or an aryl group as further radical, in N,N-dimethylacetamide having a sufficiently low water content at a temperature above room temperature under an inert gas atmosphere, wherein a sufficiently dried polymer comprising recurring azole units of the formula (1) or (2) of which 90% by weight based on the total weight of the polymer comprising recurring azole units has a particle size of less than 1 mm is used.