Rheology control of strongly basic liquids

US7700669B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Torsten Gottschalk-Gaudig · Burghausen, DE
• Michael Dreyer · Altötting, DE

Key dates

• Filing date: Mar 29, 2007
• Grant date: Apr 20, 2010
• Expiry date: May 10, 2027

Classification

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

Abstract

Silicas modified with groups of the general formula (I)RaSiR1bOc—  (I)where at least one of R or R1 is a >C3 hydrocarbon radical are useful in preparing stable dispersions of basic substances, the silica permitting a decrease in the shear viscosity h for a storage time of 1 week at room temperature (25° C.) to not more than 50% of the initial viscosity value, the viscosity being measured by means of cone/plate geometry with a shearing gap of 105 μm and a shear rate of 0.5 s−1 at 25° C.