发明名称 |
Cement dispersant and cement composition comprising this |
摘要 |
<p>The present invention provides: a cement dispersant which displays high dispersibility with a small addition amount and excellent dispersibility particularly even in a high water-reducing ratio area, and a cement composition comprising this. The first cement dispersant comprises a copolymer including: constitutional unit (I-1) derived from unsaturated (poly)alkylene glycol ether monomer (a1) as represented in general formula (1) below; and constitutional unit (II-1) derived from unsaturated monocarboxylic acid monomer (b1) as represented in general formula (2) below, as an essential component, wherein constitutional unit (II-1) includes at least one structure derived from an acrylic acid (salt), wherein general formula (1) is: XO(R<1>O)nH where: X represents an alkenyl group having 4 carbon atoms; R<1>O represents a mixture of one or more of an oxyalkylene group having 2 to 18 carbon atoms, and an oxyethylene group accounts for not less than 90 mol % of the entirety of the oxyalkylene groups; and n is an average addition number of moles and represents 1 to 300; and wherein general formula (2) is: <CHEM> where: R<2>, R<3>, and R<4> each independently represent hydrogen or a methyl group; and M represents hydrogen, a monovalent metal, a divalent metal, an ammonium group, or an organic amine group.</p> |
申请公布号 |
EP1437330(B1) |
申请公布日期 |
2009.11.04 |
申请号 |
EP20040008060 |
申请日期 |
2001.08.10 |
申请人 |
NIPPON SHOKUBAI CO., LTD. |
发明人 |
YAMASHITA, AKIHIKO;TANAKA, HIROMICHI;YAMAMOTO, MASAYA;UNO, TORU;ONDA, YOSHIYUKU;HIRATA, TSUYOSHI |
分类号 |
C04B24/28;C04B24/32;C04B24/26 |
主分类号 |
C04B24/28 |
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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