METHOD OF PREPARING AN AQUEOUS DISPERSION OF MICROCAPSULES Russian patent published in 1997 - IPC

FIELD: chemical technology, pesticides. SUBSTANCE: method involves interphase polycondensation of polymethylenepolyphenylisocyanate and polyamine in the presence of active pesticide in an aqueous medium containing surface-active substance. Copolymer of styrene and maleic anhydride (1:1) partial ester ammonium salt is used as surface-active substance at amount 2-8 wt.-% of an active pesticide amount. Metholachlorprophenphos, propiconazol and diazinone were used preferably as pesticides. EFFECT: improved method of preparing. 3 cl, 2 tbl