Cellulose ethers containing 2-propenyl groups and use thereof as protective colloids in polymerizations

US5994531A · kind A · utility

Assignee

• Clariant Corporation · DE

Inventors

• Reinhard Doenges · Bad Soden, DE
• Rudolf Ehrler · Frankenthal (Pfalz), DE
• Horst Wurm · Wiesbaden, DE

Key dates

• Filing date: Mar 2, 1998
• Grant date: Nov 30, 1999
• Expiry date: Mar 2, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08B11/193
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Water-soluble, nonionic cellulose ethers selected from the group consisting of alkylcelluloses and hydroxyalkylcelluloses having an average degree of polymerization of less than 900 which is substituted by, on average, from 0.01 to 0.04 2-propenyl groups per anhydroglucose unit are used as protective colloids in the preparation of aqueous polymer dispersions.