Patent · US Active

Water-absorbing polymer

US8859758B2 · kind B2 · utility

9Cited by

60References

21Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Markus Frank · Baden-Baden, DE
Frank Loeker · Krefeld, DE
Dirk Magolei · Geldern, DE
Scott J. Smith · Greensboro, US

Key dates

Filing date	Sep 12, 2013
Grant date	Oct 14, 2014
Priority date	—
Expiry date	Sep 12, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2301/28
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The present invention relates to a process for producing a water-absorbent polysaccharide including the process steps of bringing into contact an uncrosslinked polysaccharide with a polyphosphate or a polyphosphoric acid as crosslinking agent in the presence of water to form a polysaccharide gel and crosslinking the polysaccharide gel. The invention further relates to a water-absorbent polysaccharide obtainable by this process, a water-absorbent polysaccharide, a composite, a process for producing a composite, a composite produced by this process, the use of the water-absorbent polysaccharides or of the composites as well as the use of polyphosphates.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.