Robust polycarboxylate containing ether linkages for milling preparation of cementitious materials

US8993656B2 · kind B2 · utility

Assignees

• W.R. Grace & Co.-Conn. · US
• Nippon Shokubai Co., Ltd. · JP

Inventors

• Josephine H. Cheung · Columbia, US
• Denise A. Silva · Arlington, US
• Byong-Wa Chun · Newton, US
• Masahiro Sato · Toyohashi, JP

Key dates

• Filing date: Jan 15, 2010
• Grant date: Mar 31, 2015
• Expiry date: Jun 25, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/52
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention discloses compositions and methods wherein polycarboxylate comb polymers are used as grinding additives. The comb polymers contain a carbon-containing backbone and pendant groups wherein oxyalkylene pendant groups contain one or more ether linkage groups for providing robustness to the polymer for resisting degradation during grinding and hence sustaining workability and strength of hydratable cementitious materials, such as cements, pozzolans, limestone, and other cementitious materials.