发明名称 |
Eingekapselte Chemikalien zur Verwendung in zeitverzögerter und kontrollierter Abgabe |
摘要 |
Water soluble chemicals are encapsulated, for use in controlled time release applications, by forming a first coating of a dry hydrophobic film-forming material or a sparingly soluble material which provides a dry shield on the chemical and then forming a second coating of a porous cross-linked hydrophilic polymer on the first coating to prevent the substantial dissolution of the resulting encapsulated chemical for a period of time. |
申请公布号 |
DE60135807(D1) |
申请公布日期 |
2008.10.30 |
申请号 |
DE2001635807 |
申请日期 |
2001.05.03 |
申请人 |
HALLIBURTON ENERGY SERVICES INC. |
发明人 |
REDDY, BAIREDDY R.;CROOK, RONALD J.;GRAY, DENNIS W.;FITZGERALD, RUSSELL M.;TODD, BRADLEY L.;LARAMAY, STEVEN B. |
分类号 |
B01J13/22;C04B40/06;C09K8/46;C09K8/516;C09K8/536;E21B33/13;E21B33/138;E21B37/06 |
主分类号 |
B01J13/22 |
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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