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:
Aug. 07, 2007
Filed:
Mar. 04, 2004
Akihiko Yamashita, Ibaraki, JP;
Hiromichi Tanaka, Yokohama, JP;
Toru Uno, Yokohama, JP;
Yoshiyuki Onda, Tokyo, JP;
Tsuyoshi Hirata, Kobe, JP;
Akihiko Yamashita, Ibaraki, JP;
Hiromichi Tanaka, Yokohama, JP;
Toru Uno, Yokohama, JP;
Yoshiyuki Onda, Tokyo, JP;
Tsuyoshi Hirata, Kobe, JP;
Nippon Shokubai Co., Ltd., , JP;
Abstract
The cement admixture of the present invention can improve the workability by displaying sufficient viscosity decreasing ability and initial dispersing ability even under a low temperature environment as well as high dispersing ability and dispersion retaining ability even in a high water reducing ratio range. The above-mentioned cement admixture comprises four components of a copolymer (A) containing a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from a maleic acid monomer (b), a specific unsaturated (poly)alkylene glycol ether monomer (a), a non-polymerizable (poly)alkylene glycol (B) having no alkenyl group, and a polymer (C) having an oxyalkylene group or a polyoxyalkylene group and a carboxyl group, which is different from the copolymer (A).