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:
Aug. 22, 2017
Filed:
Feb. 08, 2013
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Matthias Weismantel, Jossgrund-Oberndorf, DE;
Ulrich Riegel, Landstuhl, DE;
Thomas Gieger, Ludwigshafen, DE;
Markus Braun, Heidelberg, DE;
Michael A. Mitchell, Waxhaw, NC (US);
Assignee:
BASF SE, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08J 9/14 (2006.01); C08G 18/63 (2006.01); C08J 9/18 (2006.01); C08J 9/06 (2006.01); C08J 9/16 (2006.01);
U.S. Cl.
CPC ...
C08J 9/18 (2013.01); C08J 9/06 (2013.01); C08J 9/14 (2013.01); C08J 9/16 (2013.01); C08J 2300/14 (2013.01); C08J 2333/08 (2013.01); C08J 2333/14 (2013.01);
Abstract
A process for producing water-absorbing polymer particles with high free swell rate and high permeability by polymerization of an aqueous monomer solution or suspension to give an aqueous polymer gel, wherein a thermal blowing agent essentially free of inorganic acid anions is mixed into the polymer gel, and subsequent thermal drying of the polymer gel.