Process for the preparation of microcapsules

Details Process for the preparation of microcapsules Process for the preparation of microcapsules

A - Human Necessities

01

N

167/4.5

A01N 25/28 (2006.01) B01J 13/04 (2006.01) B01J 13/06 (2006.01) B01J 13/16 (2006.01)

Patent

CA 1292678

Process for the preparation of microcapsules Abstract of the Disclosure The invention relates to a process for the preparation of micro- capsules 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 pesti- cide, 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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