Organosiliconate powders, method for the production thereof and use thereof for hydrophobizing mineral building materials

US8961672B2 · kind B2 · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Michael Stepp · Braunau am Inn, AT
• Dominik Auer · Dahme/Mark, DE
• Karl-Heinz Felix · Simbach, DE
• Daniel Schildbach · Altötting, DE

Key dates

• Filing date: May 7, 2012
• Grant date: Feb 24, 2015
• Expiry date: May 7, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F7/18
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Solid alkali metal salts of organosilanols and/or their hydrolysis/condensation products are prepared by hydrolysis of organosilanes in water and in the presence of a basic alkali metal salt. The products contain predominately methyl and ethyl organic groups, and C4 or higher hydrocarbon groups as well. The solid salts effectively hydrophobe building materials, while being easily mixed with water.