Method for increasing the thickening action of pyrogenically produced silicon dioxide

US4721530A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Manfred Ettlinger · Karlstein, DE
• Johann Mathias · Maintal, DE
• Guenter Stadtmueller · Alzenau, DE

Key dates

• Filing date: Oct 30, 1986
• Grant date: Jan 26, 1988
• Expiry date: Oct 30, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B33/1417
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The utilization of ethoxylated polyethyleneamines for addition to aqueous dispersions of pyrogenically prepared silicon dioxide in order to obtain an increase of the thickening action thereof.