Thermoplastic biodegradable polysaccharide derivatives, process for the manufacture thereof and use thereof

US5639865A · kind A · utility

Assignee

• Wolff Walsrode AG · DE

Inventors

• Jochen Kalbe · Leichlingen, DE
• Hanns P. Muller · Leverkusen, DE
• Rainhard Koch · Neunburg vorm Wald, DE
• Jurgen Engelhardt · Bad Fallingbostel, DE
• Wolfgang Koch · Batavia, US
• Klaus Szablikowski · Walsrode, DE
• Gunter Weber · Linden, DE

Key dates

• Filing date: Feb 9, 1995
• Grant date: Jun 17, 1997
• Expiry date: Feb 9, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31786
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to novel thermoplastic, biodegradable polysaccharide ether esters, such as for example cellulose ether esters or starch ether esters, and to the production of such graft copolymers from polysaccharides, epoxides and dicarboxylic acid anhydrides and to the use thereof, for example as moldings, films or coatings.