Highly swellable absorption medium with reduced caking tendency

US8247640B2 · kind B2 · utility

Assignee

• Evonik Stockhausen GmbH · US

Inventors

• Gerd Jonas · Kempen, DE
• Richard Mertens · Krefeld, DE
• Markus Frank · Baden-Baden, DE

Key dates

• Filing date: Mar 5, 2010
• Grant date: Aug 21, 2012
• Expiry date: Aug 3, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2300/14
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present invention concerns highly swellable absorption mediums with a reduced caking tendency at high humidity and/or high temperatures, wherein a swellable polymer is coated with a non-ionic, nitrogen-containing surfactant and optionally a Lewis acid and then reacted by heating.