发明名称 |
New additives for retarding setting of cement from methylenephosphonated aminohydrocarbylpiperazine-urea adducts |
摘要 |
Certain methylenephosphonic acid derivatives of aminohydrocarbylpiperazine-urea adducts have been found to be good cement set-retarding additives.
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申请公布号 |
US4472200(A) |
申请公布日期 |
1984.09.18 |
申请号 |
US19830528831 |
申请日期 |
1983.09.02 |
申请人 |
THE DOW CHEMICAL COMPANY |
发明人 |
CRUMP, DRUCE K.;WILSON, DAVID A. |
分类号 |
C04B24/12;C04B24/00;C04B28/02;C07F9/6509;C07F9/6558;(IPC1-7):C04B7/35 |
主分类号 |
C04B24/12 |
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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