Water-absorbing polymer structure having improved permeability and absorption under pressure

US8907017B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Mirko Walden · Herten, DE
• Harald Schmidt · Nideggen, DE
• Rainer Teni · Moers, DE
• Armin Reimann · Willich, DE
• Franck Furno · Mülheim an der Ruhr, DE
• Jörg Issberner · Lügde, DE
• Peter Herbe · Kevelaer, DE
• Ursula Nielinger · Krefeld, DE
• Michael Keup · Essen, DE

Key dates

• Filing date: Apr 20, 2007
• Grant date: Dec 9, 2014
• Expiry date: May 7, 2029

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 the preparation of water-absorbing polymer structures, comprising the following process steps: I) providing an untreated, water-absorbing polymer structure; and II) bringing the untreated, water-absorbing polymer structure into contact with a salt comprising a divalent or higher-valent cation of a metal and at least one organic base as anion. The invention relates also to the water-absorbing polymer structures obtainable by that process, to water-absorbing polymer structures, to a composite comprising a water-absorbing polymer structure and a substrate, to a process for the preparation of a composite, to the composite obtainable by that process, to chemical products, such as foams, molded articles and fibers comprising water-absorbing polymer structures or a composite, to the use of water-absorbing polymer structures or of a composite in chemical products and to the use of a salt in the treatment of the surface of water-absorbing polymer structures.