Redispersible polymer powder compositions prepared from styrene butadiene-based latex for dry mix formulations

US9181130B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Jürgen Dombrowski · Bodenwerder, DE
• Hartmut Kühn · Berlin, DE
• Margarita Perello · Stintenberger Straße, CH
• Gerold Lohmüller · Baden-Baden, DE
• Etienne Lazarus · Bischwiller, FR

Key dates

• Filing date: Jun 14, 2011
• Grant date: Nov 10, 2015
• Expiry date: Jun 22, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2201/56
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Redispersible polymer powder compositions which include a polyglycol in admixture with a redispersible polymer powder (RDP), which powder includes a codried mixture of a carboxylated, water insoluble film-forming styrene butadiene polymer and a colloidal stabilizer, results in cement compositions having unexpectedly superior overall bonding strength and adhesion after water immersion. Use of the polyglycol provides good workability or ease of troweling during application. In addition, the RDP composition, which includes the RDP and the polyglycol, provides the cement-based composition with excellent abrasion resistance, surface appearance, and color. Also, the RDP composition provides for at least a 30% reduction, for example a 50% or more reduction in the amount of retarder or retardant employed in the dry mix formulation for cement compositions, such as self leveling flooring compounds or compositions, and cement-based tile adhesives.