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. 17, 2012
Filed:
Oct. 20, 2008
Michael M. Azad, Reidsville, NC (US);
Scott J. Smith, Greensboro, NC (US);
Mark Joy, Reidsville, NC (US);
Geoffrey Wyatt Blake, Kernersville, NC (US);
Michael S. Jarman, High Point, NC (US);
Michael M. Azad, Reidsville, NC (US);
Scott J. Smith, Greensboro, NC (US);
Mark Joy, Reidsville, NC (US);
Geoffrey Wyatt Blake, Kernersville, NC (US);
Michael S. Jarman, High Point, NC (US);
Evonik Stockhausen, LLC, Greensboro, NC (US);
Abstract
A process for the preparation of superabsorbent polymer containing clay, the process including the steps of (I) polymerizing a polymerization mixture comprising: (a) one or more ethylenically unsaturated carboxyl-containing monomers, (b) one or more crosslinking agents, (c) optionally one or more comonomers copolymerizable with the carboxyl-containing monomer, (d) neutralizing agent to partially neutralize the polymer to from about 50% to about 99%, by weight, and (e) a polymerization medium, to form a crosslinked partially neutralized hydrogel, (II) admixing a clay with the crosslinked partially neutralized hydrogel to form partially neutralized superabsorbent polymer-clay hydrogel; (III) drying the crosslinked partially neutralized hydrogel at a temperature from about 190° C. to about 210° C. and for a time period of from about 15 minutes to about 120 minutes, and (IV) comminuting the dried partially neutralized superabsorbent polymer-clay hydrogel to particles.