Process for the preparation of finely divided, water-swellable polysaccharide graft polymers

US5180800A · kind A · utility

Assignee

• Starchem, Inc. · US

Inventors

• Klaus Heidel · Marl, DE
• Frank Krause · Kleve, DE
• Peter Hofmann · Goldkronach, DE

Key dates

• Filing date: May 3, 1991
• Grant date: Jan 19, 1993
• Expiry date: May 3, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F251/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Finely divided polysaccharide graft polymers having a high absorption capacity for urine and water are prepared by semi-continuous reverse-phase suspension polymerization, in which an aqueous solution of an unsaturated carboxylic acid and an initiator is metered continuously into a suspension of a polysaccharide in an organic solvent and the polymer obtained is subsequently partial dehydrated and the crosslinked.