Silanized silica

US5959005A · kind A · utility

Assignee

• Degussa-Huels AG · DE

Inventors

• Werner Hartmann · Hamburg, DE
• Juergen Meyer · Taunusstein, DE
• Hauke Jacobsen · Bruchköbel, DE
• Thomas Hennig · Richelbach, DE
• Henning Karbe · Gelnhausen, DE
• Uwe Schachtely · New York, US

Key dates

• Filing date: Apr 14, 1997
• Grant date: Sep 28, 1999
• Expiry date: Apr 14, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2995
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Silica with the following physico-chemical properties: ______________________________________ Specific surface m.sup.2 /g 80-400 Primary particle size nm 7-40 Tapped density g/l 50-300 pH value 3-10 Carbon content % 0.1-15 DBP number % <200 ______________________________________ is produced by spraying a silica under intensive mixing, optionally with water or dilute acid at first and then with a surface-modifying reagent or a mixture of several surface-modifying reagents, then mixing, tempering, and subsequently destructuring/compressing and grinding.