Method of producing hydrophilic articles of water-insoluble polymers

US4200558A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Arno Holst
• Michael Kostrzewa · Wiesbaden, DE
• Helmut Lask · Wiesbaden, DE

Key dates

• Filing date: May 8, 1978
• Grant date: Apr 29, 1980
• Expiry date: May 8, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2301/02
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Hydrophilic films, fibers and spongy articles of a water-insoluble polymer selected from the group consisting of regenerated cellulose, cellulose ether, cellulose ester and polyalkylene, and capable of forming fibers and films, are produced by distributing in a mass of the polymer up to 50% of pulverulent or granular amorphous particles of an originally water-soluble cellulose ether prepared from natural cellulose and rendered by chemical modification at least partly water-insoluble while remaining water-absorbent. The resulting mixture is then processed by conventional methods into the desired article.