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:
Jun. 02, 2015
Filed:
Sep. 03, 2013
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Faissal-Ali El-Toufaili, Ludwigshafen, DE;
Achim Stammer, Freinsheim, DE;
Simon Gramlich, Hirschberg, DE;
Angela Ulzhöfer, Ludwigshafen, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 8/02 (2006.01); C08G 75/23 (2006.01);
U.S. Cl.
CPC ...
C08G 75/23 (2013.01);
Abstract
The process for producing aromatic polyether sulfones via reaction of a dichlorodiphenyl sulfone component with a bisphenol component as monomers in the presence of alkali metal carbonate in the melt in the absence of solvents and diluents comprises carrying out the reaction in a mixing kneader which is operated with a shear rate in the range from 5 to 500 s.