Patent · US Active

Homogeneous synthesis of cellulose ethers in ionic liquids

US8541571B2 · kind B2 · utility

0Cited by

4References

24Claims

0Family size

Assignee

SE TYLOSE GMBH & CO. KG · DE

Inventors

Eugen Moellmann · Friedberg, DE
Thomas Heinze · Finnentrop, DE
Tim Liebert · Jena, DE
Sarah Koehler · Sunnyvale, US

Key dates

Filing date	Feb 25, 2009
Grant date	Sep 24, 2013
Priority date	—
Expiry date	Nov 6, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/54
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention is directed to a simple and new method for the homogeneous synthesis of cellulose ethers. Ionic liquids are not only used as solvent, but also as reaction media for the homogeneous etherification of cellulose. The dissolved cellulose is treated with the etherification agent in the absence of organic and/or inorganic bases and in the absence and/or in the presence of moderate amounts of water. The obtained cellulose ethers show new distributions of substitution on the polymer chain, resulting in new properties and applications.

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