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    Cement composition
    2.
    发明授权
    Cement composition 失效
    水泥组成

    公开(公告)号：US5925184A

    公开(公告)日：1999-07-20

    申请号：US803759

    申请日：1997-02-21

    申请人： Tsuyoshi Hirata ,  Tsutomu Yuasa ,  Toru Uno ,  Koichiro Nagare ,  Hideyuki Tahara ,  Shogo Iwai

    发明人： Tsuyoshi Hirata ,  Tsutomu Yuasa ,  Toru Uno ,  Koichiro Nagare ,  Hideyuki Tahara ,  Shogo Iwai

    IPC分类号： C04B24/26 ,  C04B24/32 ,  C04B28/02 ,  C04B24/04

    CPC分类号： C04B28/02 ,  C04B24/2647 ,  C04B24/2694 ,  C04B2103/308

    摘要： A cement composition excelling in the slump retaining property which comprises at least cement admixture comprising as a main ingredient thereof (I) a copolymer (A) of short-chain polyalkylene glycol (meth)acrylate (a), a long-chain polyalkylene glycol (meth)acrylate (b), a carboxylic acid monomer (c), and a monomer copolymerizable with the monomers mentioned above or a salt of the copolymer (B), (II) a copolymer (A.sub.1) of the monomers (a), (c), and (d) mentioned above or a salt thereof, (III) a mixture of a copolymer (A.sub.1) of the monomers (a), (c), and (d) mentioned above or a salt (B.sub.1) of thereof with a known cement admixture, or (IV) a polycarboxylic acid based polymer (A.sub.3) manifesting to a calcium sulfoaluminate based expansive additive an adsorption ratio of not less than 90% in 5 minutes at room temperature when added in an amount of 0.1% by weight as solids or a salt (B.sub.3) thereof, or (V) a mixture of said polycarboxylic acid polymer with a known cement dispersant; cement; and water.

    摘要翻译： 坍落度保持性优异的水泥组合物至少包括水泥混合物，其包含主要成分（I）短链聚亚烷基二醇（甲基）丙烯酸酯（a）的共聚物（A），长链聚亚烷基二醇（ 甲基丙烯酸酯（b），羧酸单体（c）和可与上述单体共聚的单体或共聚物（B），（II）的单体（a）的共聚物（A1） c）和（d）或其盐，（III）上述单体（a），（c）和（d）的共聚物（A1）或其盐（B1）的混合物 使用已知的水泥混合物，或（IV）表示基于硫铝酸钙的膨胀性添加剂的多元羧酸系聚合物（A3），当以0.1％的量加入时，在室温下5分钟内吸附率不小于90％ 重量为固体或其盐（B3），或（V）所述多元羧酸聚合物与已知的水泥分散剂的混合物; 水泥; 和水。

    Cement admixture and cement composition
    5.
    发明授权
    Cement admixture and cement composition 失效
    水泥外加剂和水泥组成

    公开(公告)号：US6166112A

    公开(公告)日：2000-12-26

    申请号：US82835

    申请日：1998-05-21

    申请人： Tsuyoshi Hirata ,  Tsutomu Yuasa ,  Koichiro Nagare

    发明人： Tsuyoshi Hirata ,  Tsutomu Yuasa ,  Koichiro Nagare

    IPC分类号： C04B24/26 ,  C04B24/32 ,  C08F220/06 ,  C08F222/10 ,  C08F283/01 ,  C08F290/06 ,  C08F290/14 ,  C08G65/332 ,  C08L71/02 ,  C08K3/00

    CPC分类号： C08G65/3322 ,  C04B24/2641 ,  C04B24/2647 ,  C04B24/32 ,  C08F220/06 ,  C08F222/1006 ,  C08F283/01 ,  C08F290/06 ,  C08F290/061 ,  C08F290/14 ,  C08F290/142 ,  C08L71/02 ,  C08L2205/05 ,  C08L2666/04

    摘要： The invention provides: a cement admixture which has excellent cement dispersibility and can afford high slump retainability; and a cement composition which has excellent cement dispersibility and high slump retainability. The cement admixture comprises a polycarboxylic acid as an effective component, wherein the polycarboxylic acid is obtained by a process including the steps of: charging "a" parts by weight of a polyalkylene glycol (A) and "b" parts by weight of a (meth)acrylic acid monomer (B) into a reactor in the range of {(a/n.sup.1/2)/b}.times.100.ltoreq.200, wherein n is an average molar number of the added oxyalkylene groups in the polyalkylene glycol (A) and is a number of 1 to 300; carrying out an esterification reaction of the resultant mixture in the reactor, thus obtaining a polyalkylene glycol (meth)acrylate (C); and copolymerizing the resultant polyalkylene glycol (meth)acrylate (C) and the (meth)acrylic acid monomer (B), thus obtaining the polycarboxylic acid.

    摘要翻译： 本发明提供：具有优异的水泥分散性并能提供高坍落度保持性的水泥混合物; 和具有优异的水泥分散性和高坍落度保持性的水泥组合物。 所述水泥混合物包含多元羧酸作为有效成分，其中所述多元羧酸通过包括以下步骤的方法获得：将“a”重量份的聚亚烷基二醇（A）和“b”份重量的（ 甲基）丙烯酸单体（B）加入到{（a / n + E，fra 1/2 + EE）/ b}×100≤200的范围内的反应器中，其中n是加入的氧化烯的平均摩尔数 聚亚烷基二醇（A）中的基团数为1〜300; 在反应器中进行所得混合物的酯化反应，得到聚亚烷基二醇（甲基）丙烯酸酯（C）; 并使得到的聚亚烷基二醇（甲基）丙烯酸酯（C）和（甲基）丙烯酸单体（B）共聚，得到多元羧酸。

    Cement additive, its production process and use
    7.
    发明授权
    Cement additive, its production process and use 失效
    水泥添加剂，其生产工艺和用途

    公开(公告)号：US5912284A

    公开(公告)日：1999-06-15

    申请号：US992328

    申请日：1997-12-17

    申请人： Tsuyoshi Hirata ,  Tsutomu Yuasa ,  Katsuhisa Shiote ,  Syogo Iwai ,  Koichiro Nagare

    发明人： Tsuyoshi Hirata ,  Tsutomu Yuasa ,  Katsuhisa Shiote ,  Syogo Iwai ,  Koichiro Nagare

    IPC分类号： C04B24/26 ,  C04B24/32 ,  C04B40/00 ,  C08F216/14 ,  C08F290/06 ,  C08L71/02 ,  C08K3/00

    CPC分类号： C04B24/267 ,  C04B40/0039 ,  C08F216/1416 ,  C08F290/062 ,  C08L71/02 ,  C04B2103/308

    摘要： The present invention provides a cement additive its production process and cement composition achieving excellent slump loss prevention capability. As a cement additive, there can be a copolymer (A-1) comprising an unsaturated polyalkylene glycol ether-based monomer (I), maleic acid-based monomer (II) and other monomer (III) copolymerizable with these monomers, the monomer (I)/monomer (II)/monomer (III) weight ratio being 50-99/50-1/0-49 and the weight average molecular weight of the copolymer (A) being 10,000 to 100,000 in terms of polyethylene glycol measured by gel permeation chromatography, or a copolymer (A) with an antifoaming agent (B), wherein the copolymer (A) comprises polyalkylene glycol ether-based units and dicarboxylic acid-based units as repeating units.

    摘要翻译： 本发明提供一种水泥添加剂，其生产工艺和水泥组合物具有优异的坍落度损失防止能力。 作为水泥添加剂，可以使用与这些单体共聚的不饱和聚亚烷基二醇醚系单体（I），马来酸系单体（II）和其它单体（III）的共聚物（A-1），单体（ I）/单体（II）/单体（III）的重量比为50-99 / 50-1 / 0-49，共聚物（A）的重均分子量以聚乙二醇换算为10,000至100,000 渗透色谱法或与消泡剂（B）的共聚物（A），其中共聚物（A）包含聚亚烷基二醇醚基单元和二羧酸基单元作为重复单元。

    Anti-shrinkage agent for hydraulic material
    8.
    发明授权
    Anti-shrinkage agent for hydraulic material 失效
    液压材料抗收缩剂

    公开(公告)号：US06384141B2

    公开(公告)日：2002-05-07

    申请号：US09749619

    申请日：2000-12-28

    申请人： Tsuyoshi Hirata ,  Koichiro Nagare

    发明人： Tsuyoshi Hirata ,  Koichiro Nagare

    IPC分类号： C08L7102

    CPC分类号： C04B24/2647 ,  C04B24/267 ,  C04B24/2694 ,  C04B2111/34

    摘要： The present invention is related to a shrinkage reducing agent for hydraulic materials which comprises at least one polymer selected from the group consisting of (a) a polymer having a structure derived from the residue of a compound containing 2 to 30 carbon atoms and one active hydrogen atom by the binding thereto of one oxyalkylene chain having a carboxyl-containing side chain, (b) a polymer having a structure derived from the residue of a compound containing 4 to 30 carbon atoms and two active hydrogen atoms by the binding thereto of at least one oxyalkylene chain having a carboxyl-containing side chain, (c) a polymer having a structure derived from the residue of a compound containing 1 to 30 carbon atoms and at least three active hydrogen atoms by the binding thereto of at least one oxyalkylene chain having a carboxyl-containing side chain and (d) a polymer having a structure derived from the residue of an amine by the binding thereto one oxyalkylene chain having a carboxyl-containing side chain.

    摘要翻译： 本发明涉及用于水硬性材料的减缩剂，其包含至少一种选自以下的聚合物：（a）具有衍生自含有2至30个碳原子的化合物的残基的结构的聚合物和一种活性氢 具有含羧基侧链的一个氧化烯链的结合的原子，（b）具有至少与含有羧基侧链结合的含有4至30个碳原子的化合物的残基的结构的聚合物和两个活性氢原子 一个具有含羧基的侧链的氧化烯链，（c）具有衍生自含有1至30个碳原子和至少3个活性氢原子的化合物的残基的结构的聚合物与至少一个具有羧基侧链的氧化烯链的结合， 含羧基侧链和（d）具有通过与一个具有羧基含量的氧化烯链结合而衍生自胺残基的结构的聚合物 g侧链。