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    • 33. 发明申请
    • POLYCARBOXYLIC ACID POLYMER FOR BLENDING IN CEMENT
    • 用于在水泥中混合的聚碳酸酯聚合物
    • US20160031759A1
    • 2016-02-04
    • US14867243
    • 2015-09-28
    • NIPPON SHOKUBAI CO., LTD.
    • Tsutomu YUASANoboru SAKAMOTOMari OTANI
    • C04B16/04C08F222/10
    • C04B16/04C04B24/2647C04B28/02C04B40/0039C04B2103/32C08F2/38C08F220/04C08F222/1006C08F2222/108
    • An object of the present invention is to provide a polycarboxylic acid polymer for blending in cement for a cement composition superior both in dispersion and dispersibility-retention. The object was achieved by providing the present invention of a polycarboxylic acid polymer for blending in cement,wherein (1) the molecular-weight distribution curve of the polycarboxylic acid polymer is drawn by measuring the molecular weight distribution thereof with gel permeation chromatography and plotting elution times on the abscissa, (2) a base line is drawn on the molecular-weight distribution curve, (3) the elution-starting time, elution-ending time, and peak-top time of the peak corresponding to the polymer component are respectively designated as Lh, Ln, and Mp; (4) Lm is calculated according to the following Formula (1): Lm=(Ln+Mp)/2  (1) (5) the peak area between the elution times Lm and Ln is designated as P0 and the peak area between the elution times Lh and Mp as Q0, P0 and Q0 satisfying the following Formula (2): 15≦(P0×100)/(P0+Q0)≦45  (2).
    • 本发明的目的是提供一种用于混合水泥组合物的聚羧酸聚合物,其水泥组合物在分散性和分散性保持性方面均优异。 本发明通过提供本发明的用于混合在水泥中的多元羧酸聚合物来实现,其中(1)通过用凝胶渗透色谱法和绘图洗脱法测量其分子量分布来绘制多元羧酸聚合物的分子量分布曲线 次数,(2)在分子量分布曲线上绘制基线,(3)分别对应于聚合物成分的峰的洗脱开始时间,洗脱结束时间和峰顶时间 指定为Lh,Ln和Mp; (4)Lm根据下式(1)计算:Lm =(Ln + Mp)/ 2(1)(5)洗脱时间Lm和Ln之间的峰面积被指定为P0, 洗脱次数Lh和Mp为Q0,P0和Q0满足下列公式(2):15≦̸(P0×100)/(P0 + Q0)≦̸ 45(2)。