METHOD OF PREPARING AN AQUEOUS SUSPENSION OF MICROCAPSULES Russian patent published in 1999 - IPC

FIELD: agriculture, pesticides. SUBSTANCE: invention relates to a method of preparing an aqueous suspension of pesticide-containing microcapsules. Method involves mixing polyisocyanate solution, preferably diphenylmethane-4,4'-diisocyanate, in difficultly water-soluble pesticide with polyamine in an aqueous medium in the presence of water-soluble or water-dispersible nonionogenic surface-active substance (molecular mass is 5000-25000 Da) followed by treatment of reaction mass by the known method. The following copolymers are used as a surface-active substance: polyvinylpyrrolidone-polyvinyl acetate, pluroniki, synperoniki, tetroniki, anthara. Isazophos, metholachlor, propikonazole, diazinone, phenpropidine can be used as active agents. Invention can be used for production of chemical agents for plant protection. EFFECT: improved method of preparing, absence of an anionic disperser, improved economical and ecological properties. 5 cl, 23 ex