NANOPARTICULATE ACTIVE INGREDIENT FORMULATIONS

摘要

The present invention encompasses aqueous dispersions comprising a nanoparticulate formulation of active crop protection ingredients, in which the nanoparticles have core-shell structures with a mean particle diameter of 0.05 to 2.0 µm and the active crop protection ingredient is present in the core in X-ray-amorphous form together with one or more polymers, and the shell consists of a stabilized envelope matrix preparable by a process which is characterized in that (a) a solution of the active crop protection ingredient in a water-miscible organic solvent is prepared, (b) the solution obtained in step (a) is mixed with the core polymer or a solution of the core polymer in a water-miscible organic solvent, the polymer being insoluble or only partly soluble in water or aqueous solutions or water-solvent mixtures; and (c) the mixture resulting from (b) is contacted with an aqueous solution comprising components of the envelope matrix.