Method for imparting water repellency to absorbent inorganic building materials

US4835014A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Michael Roth
• Herbert Gluck · Burghausen, DE

Key dates

• Filing date: Oct 13, 1987
• Grant date: May 30, 1989
• Expiry date: Oct 13, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B41/52
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for imparting water repellency to absorbent inorganic building materials by first contacting at least a part of the surface of the building materials to be rendered water repellent, with at least partially liquid water and thereafter applying a solution containing an organosilicon compound and a water-immiscible organic solvent to the moist surface of the inorganic building materials.