| 发明名称 |
The use of polymeric alkylenephosphoric acid piperazine derivatives as set retarding compounds for use in cement slurries. |
| 摘要 |
<p>Polymers which are the reaction product of N-aminoethylpiperazine and a dihalo or epoxy-halo compound are subsequently phosphonomethylated to provide products which are useful as cement set retarders.</p> |
| 申请公布号 |
EP0172282(A1) |
申请公布日期 |
1986.02.26 |
| 申请号 |
EP19840305632 |
申请日期 |
1984.08.17 |
| 申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
CRUMP, DRUCE K.;WILSON, DAVID A. |
| 分类号 |
C04B24/00;C07F9/6558;(IPC1-7):C04B24/12;C07F9/65 |
主分类号 |
C04B24/00 |
| 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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