The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2015
Filed:
Jan. 15, 2010
Josephine Cheung, Lexington, MA (US);
Denise Silva, Arlington, MA (US);
Byong-wa Chun, Rancho Palos Verdes, CA (US);
Masahiro Sato, Kashiwara, JP;
Josephine Cheung, Lexington, MA (US);
Denise Silva, Arlington, MA (US);
Byong-Wa Chun, Rancho Palos Verdes, CA (US);
Masahiro Sato, Kashiwara, JP;
W.R. Grace & Co.-Conn., Columbia, MD (US);
Nippon Shokubai Co., Ltd., Osaka, JP;
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.