Process for the reduction of the residual monomer content of water-absorbent foam

US7220821B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hans-Joachim Hähnle · Neustadt, DE
• Rüdiger Funk · Niedernhausen, DE
• Wolfgang Heider · Neustadt, DE
• Gunnar Schornick · Neuleiningen, DE
• Volker Frenz · Hochheim, DE

Key dates

• Filing date: Jan 30, 2003
• Grant date: May 22, 2007
• Expiry date: Jan 30, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T156/1084
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the reduction of the residual monomer content and enhancement of the wet strength of articles formed from water absorbent crosslinked polymer foams containing units derived from monoethylenically unsaturated acids, which comprises treating the formed articles with at least 0.5% by weight of a polymer containing primary and/or secondary amino groups and having a molar mass of at least 300, the formed foam articles thus obtainable and use of the wet strength enhanced formed foam articles in hygiene articles.