Use of surfactants in the drying of hydrophilic highly swellable hydrogels

US5945495A · kind A · utility

Assignee

• BASF SE

Inventors

• Thomas Daniel · Waldsee, DE
• Norbert Herfert · Charlotte, US
• Gustav Remmel · Gelnhausen, DE
• Ulrich Riegel · Landstuhl, DE
• Uwe Stuven · Bad Soden, DE
• Fritz Engelhardt · Frankfurt am Main, DE

Key dates

• Filing date: Jan 17, 1997
• Grant date: Aug 31, 1999
• Expiry date: Jan 17, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J3/075
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to the use of surfactants for improving the drying properties of hydrophilic, highly swellable hydrogels in the course of drying with the aid of contact dryers.