Water repellent for concrete

US9701590B2 · kind B2 · utility

Assignee

• Dow Corning Corporation · US

Inventors

• Lok Ming Eva Li · Midland, US
• Yihan Liu · Tianjin, CN
• Timothy A. Roggow, II · Saginaw, US
• Marie-Jose Sarrazin · Waterloo, BE
• David Brian Selley · Midland, US
• Andreas Stammer · Thiméon, BE
• Paul Cornelius Vandort · Sanford, US

Key dates

• Filing date: Sep 19, 2012
• Grant date: Jul 11, 2017
• Expiry date: Dec 5, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/91
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention provides a water repellent composition for treating porous substrates comprising an emulsion which includes water, at least one surfactant, and a siloxane copolymer having the formula (I) wherein R is an alkyl radical having 1 to 3 carbon atoms; a has a value of from 1 to 12; R′ is an alkyl radical having 8 to 12 carbon atoms, b≧2; (a+b) is at least 5. This composition shows a good depth of penetration of porous substrates especially reinforced concrete and has a low Volatile Organic Content to ASTM D 5095.