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    Copolymer for cement admixtures and its production process and use
    1.
    发明授权
    Copolymer for cement admixtures and its production process and use 有权
    水泥外加剂共聚物及其生产工艺及用途

    公开(公告)号：US06727315B2

    公开(公告)日：2004-04-27

    申请号：US10160757

    申请日：2002-06-01

    申请人： Masaya Yamamoto ,  Toru Uno ,  Yoshiyuki Onda ,  Hiromichi Tanaka ,  Akihiko Yamashita ,  Tsuyoshi Hirata ,  Naoko Hirano

    发明人： Masaya Yamamoto ,  Toru Uno ,  Yoshiyuki Onda ,  Hiromichi Tanaka ,  Akihiko Yamashita ,  Tsuyoshi Hirata ,  Naoko Hirano

    IPC分类号： C08F1602

    CPC分类号： C04B24/2647 ,  C04B24/2641 ,  C04B24/32 ,  C04B2103/408 ,  C04B2111/00189 ,  C08F216/1416 ,  C08F290/062 ,  C08G65/2609 ,  C08L51/003 ,  C08L71/02 ,  C08L2666/02 ,  C08L2666/04

    摘要： The present invention provides: a copolymer for cement admixtures which displays high dispersibility with a small adding amount and excellent dispersibility particularly even in a high water reducing ratio area, a cement admixture utilizing the copolymer, and a cement composition, and further, a production process for the copolymer. The copolymer for cement admixtures comprises: constitutional unit (I) derived from unsaturated polyalkylene glycol ether monomer (a) having an alkenyl group having 5 carbon atoms and an oxyalkylene group having 2 to 18 carbon atoms with an average addition number of moles of the oxyalkylene groups to be in the range of 10 to 300; and constitutional unit (II) derived from unsaturated monocarboxylic acid monomer (b). The cement admixture includes the copolymer for cement admixtures as an essential component, and may further include a defoaming agent. The cement composition includes the copolymer for cement admixtures, and cement as essential components. The production process for the copolymer comprises: copolymerizing comonomers including unsaturated polyalkylene glycol ether monomer (a) and unsaturated monocarboxylic monomer (b) as essential components by use of a chain-transfer agent, and/or adjusting pH of a resultant reaction mixture to not less than 5 after the copolymerization.

    摘要翻译： 本发明提供了一种用于水泥外加剂的共聚物，其特征在于即使在高减水率区域中也显示出高分散性，特别是具有小的添加量和优异的分散性，使用该共聚物的水泥混合物和水泥组合物，此外， 对于共聚物。 用于水泥混合物的共聚物包括：衍生自具有5个碳原子的烯基的不饱和聚亚烷基二醇醚单体（a）和具有2至18个碳原子的氧化烯基的结构单元（I），氧化烯的平均加成摩尔数 组别在10至300范围内; 和由不饱和一元羧酸单体（b）衍生的结构单元（II）。 水泥外加剂包括水泥外加剂作为必要成分的共聚物，还可以含有消泡剂。 水泥组合物包括用于水泥混合物的共聚物和水泥作为必要组分。 共聚物的制造方法包括：使用链转移剂使包含不饱和聚亚烷基二醇醚单体（a）和不饱和单羧酸单体（b）的共聚单体共聚为必要成分，和/或将所得反应混合物的pH调节为 共聚后小于5。

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

    公开(公告)号：US06911494B2

    公开(公告)日：2005-06-28

    申请号：US10253425

    申请日：2002-09-25

    申请人： Akihiko Yamashita ,  Hiromichi Tanaka ,  Tsuyoshi Hirata ,  Toru Uno ,  Yoshiyuki Onda

    发明人： Akihiko Yamashita ,  Hiromichi Tanaka ,  Tsuyoshi Hirata ,  Toru Uno ,  Yoshiyuki Onda

    IPC分类号： C04B24/26 ,  C04B24/32 ,  C08G65/26 ,  C08G65/332 ,  C08L71/02 ,  C08L31/02

    CPC分类号： C04B24/2647 ,  C04B2103/308 ,  C04B2103/32 ,  C08G65/2609 ,  C08G65/3322 ,  C08L71/02 ,  C08L2205/05 ,  C08L2666/04

    摘要： It is an object of the present invention to provide a cement admixture which can show not only a high dispersing ability and a slump loss preventing effect but also a viscosity reducing effect and can show these characteristics even in the high water reduction ratio range, and a cement composition in which this admixture is used.A cement admixture comprising, as three essential constituents, a copolymer (A), an unsaturated (poly)alkylene glycol ether monomer (a) and an unpolymerizable (poly)alkylene glycol (B) not containing an alkenyl group, wherein the content of the unsaturated (poly)alkylene glycol ether monomer (a) is 1 to 100% by mass relative to the copolymer (A) and the content of the unpolymerizable (poly)alkylene glycol (B) not containing an alkenyl group is 1 to 50% by mass relative to the copolymer (A), the copolymer (A) comprising, as essential constituent units, a constituent unit (I) derived from the unsaturated (poly)alkylene glycol ether monomer (a) and a constituent unit (II) derived from an unsaturated carboxylic acid monomer (b), with the constituent unit (I) and constituent unit (II) each accounting for not less than 1% by mass based on all the constituent units, and the unsaturated carboxylic acid monomer (b) being an unsaturated monocarboxylic acid monomer.

    摘要翻译： 本发明的目的是提供一种能够显示出高的分散能力和防止坍落度损失的作用的水泥混合物，而且还能够降低粘度，并且即使在高的减水率范围内也能够显示出这些特性， 使用该混合物的水泥组合物。 一种水泥外加剂，其包含不含烯基的共聚物（A），不饱和（聚）亚烷基二醇醚单体（a）和不可聚合（聚）亚烷基二醇（B）作为三种必需成分，其中， 不饱和（聚）亚烷基二醇醚单体（a）相对于共聚物（A）为1〜100质量％，不含烯基的不可聚合（聚）亚烷基二醇（B）的含量为1〜50％ 相对于共聚物（A）的共聚物（A），作为必要构成单元的共聚物（A），由不饱和（聚）亚烷基二醇醚单体（a）得到的构成单元（I）和由 不饱和羧酸单体（b）与构成单元（I）和构成单元（II）各自占所有构成单元不少于1质量％，不饱和羧酸单体（b）为 不饱和一元羧酸单体。

    Cement admixture and cement composition
    6.
    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：US07253220B2

    公开(公告)日：2007-08-07

    申请号：US10791730

    申请日：2004-03-04

    申请人： Akihiko Yamashita ,  Hiromichi Tanaka ,  Toru Uno ,  Yoshiyuki Onda ,  Tsuyoshi Hirata

    发明人： Akihiko Yamashita ,  Hiromichi Tanaka ,  Toru Uno ,  Yoshiyuki Onda ,  Tsuyoshi Hirata

    IPC分类号： C04B24/26

    CPC分类号： C08G65/3322 ,  C04B28/02 ,  C04B40/0039 ,  C08L71/02 ,  C08L2205/05 ,  C08L2666/04 ,  C04B24/267 ,  C04B24/32

    摘要： 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).

    摘要翻译： 本发明的水泥外加剂即使在高的减水率范围内，即使在低温环境下也显示出足够的降粘能力和初始分散能力以及高分散能力和分散保持能力，可以提高加工性。 上述水泥混合物包含含有源自不饱和（聚）亚烷基二醇醚单体（a）的构成单元（I）和源自马来酸单体的构成单元（II）的共聚物（A）的四种组分 b），不饱和（聚）亚烷基二醇醚单体（a），不具有烯基的不可聚合（聚）亚烷基二醇（B）和具有氧化烯基或聚氧化烯基的聚合物（C）和 羧基，其不同于共聚物（A）。