C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 20/20 (2006.01) C04B 24/26 (2006.01) C04B 24/32 (2006.01)
Patent
CA 2180989
A cement dispersant having excellent ability to prevent slump loss and high water-reducing property which comprises a polycarboxylic acid type polymer having a specific molecular weight distribution, a method for the production thereof, and a cement composition using the dispersant are provided. The cement dispersant comprises as a main component thereof a polycarboxylic acid type polymer (A), having a weight average molecular weight in the range of 10,000 to 500,000 in terms of polyethylene glycol determined by gel permeation chromatography, and having a value determined by subtracting the peak top molecular weight from the weight average molecular weight in the range of 0 to 8,000.
Hirata Tsuyoshi
Ohta Akira
Tahara Hideyuki
Tanaka Yoshio
Uno Toru
Degussa Construction Chemicals (europe) Ag
Nippon Shokubai Co. Ltd.
Sandoz Ltd.
Sim & Mcburney
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