| 发明名称 |
Methylene phosphonic acid scale inhibitor compositions derived from aminohydrocarcarbylpiperazine urea adducts |
| 摘要 |
Certain methylene phosphonic acid derivatives of aminohydrocarbyl piperazine-urea adducts are good threshold agents to prevent metal ion precipitation in aqueous solutions. These derivatives have the formula <IMAGE> wherein A is <IMAGE> wherein X is <IMAGE> or H and wherein R is H, ammonium, an alkali or alkaline earth metal, m is 0-2, n is 2 or 3 and wherein at least one X is <IMAGE>
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| 申请公布号 |
US4518777(A) |
申请公布日期 |
1985.05.21 |
| 申请号 |
US19830528835 |
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 |
C08G73/02;C02F5/00;C02F5/08;C02F5/10;C02F5/12;C02F5/14;C07F9/6509;C07F9/6558;(IPC1-7):C07D241/04;C07D403/12 |
主分类号 |
C08G73/02 |
| 代理机构 |
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代理人 |
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