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:
Nov. 21, 2017
Filed:
Jan. 20, 2014
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Monica Haag, Ludwigshafen, DE;
Roland Krauss, Neustadt, DE;
Thomas Gieger, Ludwigshafen, DE;
Volker Klock, Ludwigshafen, DE;
Matthias Weismantel, Jossgrund-Oberndorf, DE;
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/10 (2006.01); C08F 222/10 (2006.01); C08F 6/00 (2006.01); C08F 8/00 (2006.01); C08J 3/24 (2006.01); A61L 15/60 (2006.01); C08F 220/06 (2006.01);
U.S. Cl.
CPC ...
C08F 222/1006 (2013.01); A61L 15/60 (2013.01); C08F 2/10 (2013.01); C08F 220/06 (2013.01); C08J 3/245 (2013.01); C08J 2333/02 (2013.01);
Abstract
A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.