Hydrophilic, highly swellable hydrogels

US5331059A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Friedrich Engelhardt · Frankfurt, DE
• Rüdiger Funk · Niedernhausen, DE
• Ulrich Riegel · Landstuhl, DE
• Gerlinde Ebert · Rödermark, DE
• Hanss-Jerg Kleiner · Kronberg, DE

Key dates

• Filing date: Nov 12, 1992
• Grant date: Jul 19, 1994
• Expiry date: Nov 12, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S524/916
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a hydrophilic, highly swellable hydrogel based on (co)polymerized hydrophilic monomers or based on graft (co)polymers, characterized in that it has been surface-modified by means of a mixture of PA1 A) one or more diglycidyl phosphonates and PA1 B) one or more other reactive compounds which are capable of reacting with the functional groups in the polymer, to a process for the preparation thereof, to the use thereof, and to diglycidyl phosphonate-containing crosslinking agent mixtures.