Cellulose ethers

US6939960B2 · kind B2 · utility

Assignee

• Wolff Walsrode AG · DE

Inventors

• Erik-Andreas Klohr · Walsrode, DE
• Jörg Neubauer · Walsrode, DE
• Wolfgang Koch · Batavia, US
• Klaus Szablikowski · Walsrode, DE
• Detmar Redeker · Cologne, DE
• Wolfgang Wagenknecht · Teltow, DE
• Fritz Loth · Teltow, DE

Key dates

• Filing date: Sep 30, 2002
• Grant date: Sep 6, 2005
• Expiry date: Oct 6, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/985
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A cellulose ether that is predominantly substituted in the C3 position of the anhydroglucose unit of the cellulose is described. In an embodiment of the present invention, the partial degree of substitution in the C3 position of the cellulose ether is ≧60%, based on the total degree of substitution.