Process for preparing storage-stable pesticide dispersion

Details Process for preparing storage-stable pesticide dispersion Process for preparing storage-stable pesticide dispersion

B - Operations, Transporting

01

J

B01J 13/16 (2006.01) A01N 25/28 (2006.01) A01N 25/30 (2006.01) A01N 33/18 (2006.01) A01N 57/16 (2006.01)

Patent

CA 2261034

Aqueous dispersions of microcapsules containing a high loading of pesticide in the form of supercooled melts or supersaturated solutions are stabilised to crystallisation of the pesticide by ensuring that the volume median particle size of the microcapsules is kept below 6µm, and by employing surfactants which do not form micelles under storage conditions, thereby inhibiting transportation of the pesticide through the aqueous phase.

Cette invention se rapporte à un procédé de stabilisation, vis à vis de la cristallisation du pesticide en présence, de dispersions aqueuses de microcapsules contenant une forte charge de pesticide sous la forme de produits surfondus ou de solutions sursaturées. Ledit procédé consiste à s'assurer que le diamètre volumique moyen des microcapsules reste inférieur à 6 µm, et à utiliser des agents tensioactifs qui ne forment pas de micelles dans les conditions de stockage et qui empêchent ainsi le transport du pesticide à travers la phase aqueuse.

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