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. 02, 2002
Filed:
Feb. 10, 2000
Applicant:
Inventors:
Knud Reuter, Krefeld, DE;
Claus-Ludolf Schultz, Krefeld, DE;
Ute Wollborn, Krefeld, DE;
Heinz Pudleiner, Krefeld, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 8/100 ; C08G 7/523 ;
U.S. Cl.
CPC ...
C08G 8/100 ; C08G 7/523 ;
Abstract
A process for the production of polyether block copolysulfones via trans-etherification is disclosed. In the inventive process, an aromatic sulfone polymer is reacted with an aliphatic polyether having on average at least one terminal OH function, preferably in the presence of a basic catalyst. In a preferred embodiment the reaction is carried out in a dipolar aprotic solvent.