Patent · US Expired

Process for the preparation of water-soluble aminoalkyl derivatives of polysaccharides

US5739304A · kind A · utility

2Cited by

2References

8Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Reinhard Doenges · Bad Soden, DE
Rudolf Ehrler · Frankenthal (Pfalz), DE
Andreas Schrell · Hofheim, DE

Key dates

Filing date	Dec 22, 1995
Grant date	Apr 14, 1998
Priority date	—
Expiry date	Dec 22, 2015

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08B31/125
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Water-soluble polysaccharides which contain PA1 a) substituents selected from the group consisting of alkyl, hydroxyalkyl, carboxyalkyl and sulfoalkyl, PA1 b) N,N-disubstituted aminoalkyl groups, are prepared by alkylation of a polysaccharide in the presence of a base with one or more alkylation reagents, selected from the group consisting of compounds transferring alkyl groups, compounds transferring hydroxyalkyl groups, compounds transferring carboxyalkyl groups and compounds transferring sulfoalkyl groups, and also with an N,N-disubstituted amino-alkylsulfuric acid ester. The modified polysaccharides are used in paper production and waste-water purification and also in cosmetics.

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