NANOPARTICLES COMPOSITIONS OF ACTIVE SUBSTANCE Russian patent published in 2010 - IPC A01N47/34 A01N43/653 A01N25/28 A01N53/00 A01N47/24 A01N43/40 A01N25/04 A01P3/00 A01P7/00 A01P13/00 

FIELD: agriculture.

SUBSTANCE: aqueous dispersion for plant protection contains a nanoparticle composition of active substances where nanoparticles have a core-shell structure with an average diametre of particles from 0.05 to 2.0 microns. Active substance is amorphous to X-rays, it is located in the nucleus with one or more polymers. The shell consists of a stabilising wrapping matrix. Upon obtaining of nanoparticles (a), a solution of active substance is obtained for plant protection in water-miscible organic solvent, (b) obtained at the stage (a) solution is mixed with a polymer of core or a core polymer solution in water-miscible organic solvent, and the polymer is insoluble, or only partially soluble in water or aqueous solutions or mixtures of water with a solvent; (c) the obtained from (b) mixture is contacted with an aqueous solution comprising components of the wrapping matrix. Solid composition is obtained by drying an aqueous dispersion. Agrochemical composition from the solid bearer is treated with dispersion or a solid composition. Processing of plants is carried out applying the said compositions.

EFFECT: higher stability of compositions.

17 cl, 3 ex