Synthetic polymer rheology modifier and water retention agent replacement for cellulose ether in cement compositions

US10173925B2 · kind B2 · utility

Assignees

• DOW GLOBAL TECHNOLOGIES LLC · US
• Rohm and Haas Company · US

Inventors

• Robert Baumann · Rüschlikon, CH
• Adam W. Freeman · Doylestown, US
• Philip M. Imbesi · Gilbertsville, US
• Marc Schmitz · Verden, DE
• Hongwei Shen · Holmdel, US
• Wei-Wen Tsai · Philadelphia, US
• Sipei Zhang · Royersford, US

Key dates

• Filing date: Mar 27, 2015
• Grant date: Jan 8, 2019
• Expiry date: May 24, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F222/102
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides substantially nonionic brush polymers having pendant polyether groups, preferably poly(alkylene glycol) groups, which polymers are useful as synthetic polymer substitutes for cellulose ethers in mortars and hydraulic binders. The brush polymers are preferably crosslinked, such as with ethylene glycol di(meth)acrylates.