Dispersion containing silica particles surface-modified with quaternary, aminofunctional organosilicon compounds

US8747541B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Stefan Scharfe · Niederrodenbach, DE
• Christoph Batz-Sohn · Hanau, DE
• Heinz Lach · Rodenbach, DE
• Andrea Heuschen · Bad Orb, DE
• Burkhard Standke · Soest, DE
• Christian Wassmer · Eschborn, DE

Key dates

• Filing date: Mar 24, 2010
• Grant date: Jun 10, 2014
• Expiry date: Mar 4, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/22
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Dispersion obtainable by reacting a) in 50 to 75 parts by weight of water b) 25 to 50 parts by weight of silica particles having a BET surface area of 30 to 500 m2/g and c) 100 to 300 μg/m2 BET surface area of the silica particles from b) parts by weight of one or more aminofunctional, organosilicon compounds, the aminofunctional, organosilicon compound being a quaternary, aminofunctional, organosilicon compound which is obtainable by reacting at least one haloalkylfunctional silane as component A with a tertiary amine as component B in the presence of a defined amount of water and at least partly removing the resulting hydrolysis alcohol from the system.