| 发明名称 |
New methylene phosphonic acid scale inhibitor compositions derived from aminohydrocarbylpiperazine-urea adducts. |
| 摘要 |
<p>Certain methylene phosphonic acid derivatives of aminohydrocarbyl piperazine-urea adducts are good threshold agents to prevent metal ion precipitation in aqueous solutions. The adducts have the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="13" wi="48" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein A is
<Chemistry id="chema02" num="0002"><Image id="ia02" he="15" wi="82" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>X is
<Chemistry id="chema03" num="0003"><Image id="ia03" he="10" wi="18" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>or H; R is H, ammonium, an alkali or alkaline earth metal; m is O-2; n is 2 or 3; and wherein at least one X is:
<Chemistry id="chema04" num="0004"><Image id="ia04" he="14" wi="19" file="IMGA0004.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry></p> |
| 申请公布号 |
EP0136015(A1) |
申请公布日期 |
1985.04.03 |
| 申请号 |
EP19840305408 |
申请日期 |
1984.08.08 |
| 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):C07F9/65 |
主分类号 |
C08G73/02 |
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