Water repellent composition

US5695551A · kind A · utility

Assignee

• Dow Corning Corporation · US

Inventors

• Anne Buckingham · Midland, US
• Tara Nicole Estes · Midland, US
• Michael B. Gee · Racine, US
• David Brian Selley · Midland, US
• Janet Mary Smith · Bay City, US

Key dates

• Filing date: Dec 9, 1996
• Grant date: Dec 9, 1997
• Expiry date: Dec 9, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/00517
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A composition is formed by combining water with an organic polymer such as polybutylene or an alkyd resin, and an alkoxysilane of the formula R.sub.n Si(OR').sub.4-n where R is an alkyl radical of 1-10 carbon atoms, an alkenyl radical having 2-8 carbon atoms, phenyl, chloropropyl, or trifluoropropyl, n is 1 or 2, and R' is an alkyl radical having 1-6 carbon atoms. The composition is free of amine or quaternary ammonium functional silanes. It can be emulsified and used to treat a cellulosic or masonry surface to render it water repellent.