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    • 4. 发明公开
    • Copolymer for cement admixtures and its production process and use
    • Zementzusammensetzungen und ihre Verwendung
    • EP1103570A2
    • 2001-05-30
    • EP00125128.9
    • 2000-11-17
    • Nippon Shokubai Co., Ltd.
    • Yamamoto, MasayaUno, ToruOnda, YoshiyukiTanaka, HiromichiYamashita, AkihikoHirata, TsuyoshiHirano, Naoko
    • C08F216/14C08F290/06C04B24/26
    • C04B24/2647C04B24/2641C04B24/32C04B2103/408C04B2111/00189C08F216/1416C08F290/062C08G65/2609C08L51/003C08L71/02C08L2666/02C08L2666/04
    • 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.
    • 本发明提供了一种水泥混合物的共聚物,即使在高的减水率区域,特别是即使在高的减水率面积下也显示出高分散性和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, 用于共聚物。 水泥混合物用共聚物包括:由具有碳原子数5的烯基和碳原子数2〜18的氧化烯基的不饱和聚亚烷基二醇醚单体(a)和氧化烯的平均加成摩尔数导出的结构单元(I) 组别在10到300的范围内; 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调节至不 共聚后小于5。
    • 8. 发明公开
    • HARDENED CALCIUM SILICATE HAVING HIGH STRENGTH
    • 食品加工食品卫生
    • EP1362836A1
    • 2003-11-19
    • EP01904541.8
    • 2001-02-19
    • Asahi Kasei Kabushiki Kaisha
    • MATSUYAMA, HiroyoshiMATSUI, KunioSHIMIZU, Tadashi
    • C04B28/18C01B33/24
    • C04B28/18C01B33/24C04B2111/00189C04B7/00C04B22/04C04B22/143C04B22/148C04B32/02C04B38/02C04B38/106C04B40/0028C04B40/024
    • Disclosed is a cured form of calcium silicate, mainly comprising tobermorite and exhibiting a powder X-ray diffraction pattern in which the diffraction peak intensity Ib ascribed to the (220) plane of the tobermorite and the minimum diffraction intensity Ia observed in the diffraction angle range between the two diffraction peaks respectively ascribed to the (220) plane and (222) plane of the tobermorite satisfy the relationship Ib/Ia ≥ 3.0; a differential pore distribution curve obtained by mercury porosimetry in which the logarithmic width of the pore diameter distribution as measured at a height of 1/4 of the height of the maximum peak of the differential pore distribution curve is from 0.40 to 1.20, and also disclosed is a reinforced calcium silicate composite structure, and methods for producing same. The cured form of calcium silicate and the reinforced calcium silicate composite structure of the present invention which, while exhibiting an apparent specific gravity of from 0.14 to 1.0 (and, hence, having a light weight), exhibit excellent properties as a building material, such as a high strength, a high modulus of elasticity, a high resistance to the neutralization reaction, a high dimensional stability, and a high resistance to chipping.
    • 公开了一种主要含有硅钙石并呈现粉末X射线衍射图形的硅酸钙的固化形式,其中归因于硅钙石的(220)面的衍射峰强度Ib和衍射角范围内观察到的最小衍射强度Ia 分别归因于雪硅钙石的(220)面和(222)面的两个衍射峰之间满足Ib /Ia≥3.0的关系; 通过水银孔率法获得的差分孔分布曲线,其中在差分孔分布曲线的最大峰的1/4的高度处测量的孔径分布的对数宽度为0.40至1.20,并且还公开 是增强硅酸钙复合结构体及其制造方法。 本发明的固化形式的硅酸钙和增强的硅酸钙复合结构虽然表现出比重为0.14-1.0(并且因此具有轻质量),但是作为建筑材料表现出优异的性能, 作为高强度,高弹性模量,高抗中和反应性,高尺寸稳定性和高耐碎裂性。