发明名称 |
Cement admixture and method for producing the same |
摘要 |
<p>The present invention is to provide a method for producing a copolymer for a cement admixture, which enables to easily produce a blend of a plurality of copolymers with different monomer compositions in one polymerization operation, and is superior in water reducing performance and/or slump retention ability. Disclosed is a method for producing a copolymer for a cement admixture, which comprises a step of polymerizing monomer components comprising unsaturated polyalkylene glycol ether-based monomer (A) and unsaturated organic acid-based monomer (B), wherein the unsaturated polyalkylene glycol ether-based monomer (A) is added into a reactor in advance and the unsaturated organic acid-based monomer (B) is added thereto with an addition rate thereof changed at least one time.</p> |
申请公布号 |
EP1690877(A1) |
申请公布日期 |
2006.08.16 |
申请号 |
EP20060002688 |
申请日期 |
2006.02.10 |
申请人 |
NIPPON SHOKUBAI CO.,LTD. |
发明人 |
ASANO, HIDEO;YAMASHITA, AKIHIKO |
分类号 |
C08F216/14;C04B16/04;C08F220/00;C08F222/00 |
主分类号 |
C08F216/14 |
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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