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:
Jul. 07, 2015
Filed:
Apr. 25, 2013
Basf SE, Ludwigshafen, DE;
Rainer Dobrawa, Stuttgart, DE;
Thomas Daniel, Waldsee, DE;
Uwe Stueven, Bad Soden, DE;
Marco Krüger, Mannheim, DE;
Francisco Javier Lopez Villanueva, Schifferstadt, DE;
Norbert Herfert, Altenstadt, DE;
Karin Flore, Floersheim-Dalsheim, DE;
Stefan Blei, Mannheim, DE;
Michael A. Mitchell, Waxhaw, NC (US);
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase and flowing the gas cocurrent through the polymerization chamber, wherein the temperature of the gas leaving the polymerization chamber is 130° C. or less, the gas velocity inside the polymerization chamber is at least 0.5 m/s, and the droplets are generated by using a droplet plate having a multitude of bores.