发明名称 |
Process for the preparation of microcapsules |
摘要 |
The invention relates to a process for the preparation of microcapsules having a capsule wall of polyurea and encapsulating a water-immiscible pesticide. The process comprises first dispersing a solution of a polyisocyanate in the sparingly water-soluble pesticide, in the presence of an anionic dispersant and at least one nonionic protective colloid and/or a nonionic surfactant, and subsequently reacting the dispersion with a polyamine, to give a stable aqueous suspension of microcapsules which can be used either direct or after dilution with water as pesticidal composition.
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申请公布号 |
US4938797(A) |
申请公布日期 |
1990.07.03 |
申请号 |
US19880203791 |
申请日期 |
1988.06.07 |
申请人 |
CIBA-GEIGY CORPORATION |
发明人 |
HAESSLIN, HANS W.;HOPKINSON, MICHAEL J. |
分类号 |
B01J13/02;A01N25/04;A01N25/28;A01N37/22;A01N57/16;B01J13/16 |
主分类号 |
B01J13/02 |
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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