Hydrophilic open-cell, elastic foams with a melamine/formaldehyde resin base, production thereof and use thereof in hygiene products

US6828354B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Hans-Joachim Hähnle · Neustadt, DE
• Horst Baumgartl · Ludwigshafen, DE
• Norbert Herfert · Charlotte, US

Key dates

• Filing date: Mar 10, 2003
• Grant date: Dec 7, 2004
• Expiry date: Jun 19, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2361/28
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Hydrophilic open-celled resilient foams comprising melamine-formaldehyde resins, obtainable by(a) heating and crosslinking an aqueous solution or dispersion each containing at least a melamine-formaldehyde precondensate, an emulsifier, a blowing agent and a curing agent to form a foam,(b) then conditioning the foam at from 120 to 300° C. for from 1 to 180 minutes to remove volatiles, and(c) treating the foam during the conditioning or thereafter with at least one polymer containing primary and/or secondary amino groups and having a molar mass of not less than 300,are useful in hygiene articles to acquire, distribute andimmobilize body fluids.