Polymer composition and use of the same as an additive in aqueous construction systems and water-based paint and coating systems

US7772300B2 · kind B2 · utility

Assignee

• CONSTRUCTION RESEARCH & TECHNOLOGY GMBH · DE

Inventors

• Michael Schinabeck · Garching bei München, DE
• Stefan Friedrich · San Gabriel, US
• Uwe Holland · Wehringen, DE
• Peter Gäberlein · Wasserburg am Inn, DE
• Manfred Schuhbeck · Trostberg, DE

Key dates

• Filing date: Mar 16, 2005
• Grant date: Aug 10, 2010
• Expiry date: Dec 15, 2025

Classification

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

Abstract

A polymeric composition consisting of water-soluble or water-swellable copolymers containing sulfo groups and nonionic polysaccharide derivatives, such as methylcellulose (MC), hydroxyethylcellulose (HEC), hydroxypropylcellulose (HPC), methylhydroxyethylcellulose (MHEC), methylhydroxypropylcellulose (MHPC) and welan gum or diutan gum, and the use thereof as an additive in aqueous construction systems based on hydraulic binders, such as cement, lime, gypsum or anhydrite, is described. The composition can also be used in water-based paint and coating systems. The composition according to the invention exhibits a synergistic improvement of the properties and, when used in relatively small amounts, constitutes highly effective water retention agents in such construction and paint systems, which also achieve outstanding air pore stability and tack.