发明名称 |
NOVEL PHOSPHINO DERIVATIVES |
摘要 |
The reaction of compounds of the formula: X2O3P CHY CZ2 where Y and each Z are each H, PO3X2, SO3X or CO2X (e.g. vinyl phosphonic ac id or vinylidene diphosphonic acid) with hypophosphorous acid in the presence-of free radicals provides novel compounds X2O3PCHYCZ2PO2XH which react with monomers such as vinyl sulphonate, vinyl phosphonate, vinylidene diphosphonate and acrylic acid to form telomers useful for scale inhibition, especially barium scale in oil wells. The polymers show better absorption to rock than PVSA and better thermal stability than random copolymers containing equivalent phosphorus.
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申请公布号 |
CA2230517(C) |
申请公布日期 |
2007.04.24 |
申请号 |
CA19982230517 |
申请日期 |
1998.02.25 |
申请人 |
ALBRIGHT & WILSON UK LIMITED |
发明人 |
SMITH, ALAN CRAIG;WALKER, DAVID ROBERT EDWARD;DAVIS, KEITH PHILIP;WOODWARD, GARY |
分类号 |
C23F11/167;C02F5/14;C07F9/38;C07F9/48;C08F8/40;C09D5/08;C11D3/00;C11D3/37;C23F11/173;C23F14/02 |
主分类号 |
C23F11/167 |
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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