Patent ID: 9095133
Filing Date: 2015-08-04
Classification: A01N

Abstract:
1. A process for preparing a pesticide composition, which comprises: (i) forming an oil-in-water emulsion by combining a water-insoluble organic pesticide, a volatile water-immiscible organic solvent, water and at least one surfactant, wherein the emulsion is a thermodynamically stable microemulsion that has a droplet size of less than about 30 nm and that is formed spontaneously without the use of high-pressure homogenizer or a high shear instrument; or wherein the emulsion is a nanoemulsion having a droplet size of less than about 300 nm formed by combining a water-insoluble organic pesticide, a volatile water-immiscible organic solvent, water and at least one surfactant using a high pressure homogenizer or a high shear instrument; and (ii) removing the volatile water-immiscible organic solvent and the water from the nanoemulsion or microemulsion in one step to form a pesticide composition in the form of a dispersible powder comprising nanoparticles having a diameter of about 5 to about 300 nm; wherein the nanoparticles are in finely divided particulate form to impart a solubility that is substantially greater than that of the pesticide in a conventional emulsifiable concentrate formulation.