Process for gentle mixing and coating of superabsorbers

US8349913B2 · kind B2 · utility

Assignee

• Evonik Stockhausen GmbH · US

Inventors

• Jorg Harren · Baesweiler, DE
• Herbert Vorholt · Haltern, DE
• Manfred Van Stiphoudt · Kempen, DE
• Rudiger Hose · Tönisvorst, DE
• Stephan Ramlow · Krefeld, DE
• Stefan Derstappen · Tönisvorst, DE
• Axel Busch · Krefeld, DE
• Michael Lange · Rheinberg, DE
• Waldemar Inger · Krefeld, DE
• Kai Hebben · Tönisvorst, DE

Key dates

• Filing date: May 21, 2008
• Grant date: Jan 8, 2013
• Expiry date: Feb 24, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31855
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of a superabsorber, comprising as steps providing a water-absorbing polymer structure, bringing the water-absorbing polymer structure into contact with a modifying agent, preferably a modifying agent, and the further treatment of the water-absorbing polymer structure which has been brought into contact with the modifying agent. The further treatment is carried out at least partly in a rotating container. The invention furthermore relates to a device for the production of a superabsorber, superabsorbers, a composite, a process for the production of a composite, the composites obtainable by this process, chemical products, such as foams, shaped articles or fibers, and the use of a superabsorber.