发明名称 |
Cement admixtures and its use |
摘要 |
<p>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.</p> |
申请公布号 |
EP1103570(B1) |
申请公布日期 |
2014.05.07 |
申请号 |
EP20000125128 |
申请日期 |
2000.11.17 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
YAMAMOTO, MASAYA;UNO, TORU;ONDA, YOSHIYUKI;TANAKA, HIROMICHI;YAMASHITA, AKIHIKO;HIRATA, TSUYOSHI;HIRANO, NAOKO |
分类号 |
C04B24/02;C04B24/26;C04B24/32;C04B28/02;C04B103/32;C08F216/14;C08F290/06;C08G65/26;C08L51/00;C08L71/02 |
主分类号 |
C04B24/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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