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:
Feb. 16, 2010
Filed:
Apr. 23, 2003
Tsutomu Yuasa, Osaka, JP;
Hiromichi Tanaka, Yokohama, JP;
Noboru Sakamoto, Takatsuki, JP;
Tomotaka Nishikawa, Takatsuki, JP;
Hiroko Izukashi, Osaka, JP;
Toru Uno, Yokohama, JP;
Tsuyoshi Hirata, Kobe, JP;
Tomiyasu Ueta, Suita, JP;
Yoshiyuki Onda, Tokyo, JP;
Tsutomu Yuasa, Osaka, JP;
Hiromichi Tanaka, Yokohama, JP;
Noboru Sakamoto, Takatsuki, JP;
Tomotaka Nishikawa, Takatsuki, JP;
Hiroko Izukashi, Osaka, JP;
Toru Uno, Yokohama, JP;
Tsuyoshi Hirata, Kobe, JP;
Tomiyasu Ueta, Suita, JP;
Yoshiyuki Onda, Tokyo, JP;
Nippon Shokubai Co., Ltd., Osaka, JP;
Abstract
It is an object of the present invention, which has been made in view of the above-mentioned state of the art, to provide a cement admixture capable of improving the water-reducing ability of cement compositions and the like and enhancing the strength and durability of hardened products produced therefrom and further capable of adjusting the viscosity of such compositions so as to facilitate the works at the sites of handling the same, as well as a method of producing such cement additive. A cement admixture comprising a polycarboxylic acid polymer and a nitrogen atom-containing compound having non-amide bond, wherein the mass ratio (A/B) between the mass (A) of said polycarboxylic acid polymer and the mass (B) of said nitrogen atom-containing compound having non-amide bond satisfies the relation 200>(A/B)>1.