Hydrolytically stable postcrosslinked superabsorbents

US7728079B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Jorg Harren · Baesweiler, DE
• Jörg Issberner · Lügde, DE
• Mirko Walden · Herten, DE
• Rainer Teni · Moers, DE
• Franck Furno · Mülheim an der Ruhr, DE
• Peter Werle · Gelnhausen, DE
• Hans-Peter Krimmer · Burgkirchen an der Alz, DE

Key dates

• Filing date: Feb 24, 2006
• Grant date: Jun 1, 2010
• Expiry date: Feb 24, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2333/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for producing postcrosslinked water-absorbing polymeric formations, comprising the steps of contacting water-absorbing polymeric formations P1 obtained by polymerization of ethylenically unsaturated acid-functional monomers or salts thereof in the presence of a crosslinker with a fluid F1 comprising a postcrosslinker,