发明名称 |
Aqueous gellable composition with delayed gelling time |
摘要 |
An aqueous gellable composition having a delayed gelling time presettable within wide time and temperature ranges, contains a water-soluble organic polymer crosslinkable with chrome ion and a crosslinking/retardant system definable by the formula: Cr(L)m.nL' wherein: Cr is a trivalent chrome ion; L is an organic ligand consisting of a monocarboxylate or dicarboxylate ion, optionally bearing one or more amino or hydroxy functional group(s), in form complexed with chrome ion; L' is an organic ligand consisting of a monocarboxy or dicarboxy acid, optionally bearing one or more amino or hydroxy functional group(s), in form not complexed with chrome ion; m has a value comprised within the range of from 1 to 3, depending on the nature of the ligand L; n has a value comprised within the range of from 0.5 to 100; with the proviso that in the crosslinking/retardant system, the ligand L is different from the ligand L'.
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申请公布号 |
US5338465(A) |
申请公布日期 |
1994.08.16 |
申请号 |
US19920853839 |
申请日期 |
1992.03.19 |
申请人 |
ENIRICERCHE S.P.A.;AGIP S.P.A. |
发明人 |
LOCKHART, THOMAS P.;ALBONICO, PAOLA |
分类号 |
B01J13/00;C07F11/00;C09K3/00;C09K8/512;C09K8/58;C09K8/88;E02D3/12;E21B33/138;(IPC1-7):E21B33/13 |
主分类号 |
B01J13/00 |
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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