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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.:

US 9944739 B1

PDFFull Text
Date of Patent:
Apr. 17, 2018

Filed:

Jul. 27, 2017

Process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution

Applicant:

Basf SE, Ludwigshafen, DE;

Inventors:

Thomas Daniel, Waldsee, DE;

Norbert Herfert, Altenstadt, DE;

Stephan Bauer, Hochheim, DE;

Katrin Baumann, Mannheim, DE;

Birgit Reinhard, Limburgerhof, DE;

Jürgen Freiberg, Lampertheim, DE;

Rudolf Schliwa, Alzenau, DE;

Assignee:

BASF SE, Ludwigshafen, DE;

Attorney:

Marshall, Gerstein & Borun LLP

Primary Examiner:

Edward Johnson

Int. Cl.
CPC ...
A61L 15/22 (2006.01); C08F 220/06 (2006.01); C08L 33/02 (2006.01); B01J 20/28 (2006.01); B01J 20/26 (2006.01); A61L 15/24 (2006.01); C08F 6/00 (2006.01); A61L 15/42 (2006.01); A61L 15/60 (2006.01);
U.S. Cl.
CPC ...
C08F 220/06 (2013.01); A61L 15/22 (2013.01); A61L 15/24 (2013.01); A61L 15/42 (2013.01); A61L 15/60 (2013.01); B01J 20/267 (2013.01); B01J 20/2805 (2013.01); B01J 20/28023 (2013.01); C08F 6/005 (2013.01); C08L 33/02 (2013.01);
Abstract

The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution comprising less than 0.3% by weight of persulfate and at least 0.05% by weight of azo initiator and thermal aftertreatment of the formed polymer particles at less than 100° C. in a fluidized bed for 60 to 300 minutes.

Find Patent Forward Citations

Daniel, Thomas. (2018). Process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution (U.S. Patent No. 9944739). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9944739

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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