METHOD FOR OBTAINING PREPARATION FOR ELIMINATING DOMESTIC INSECTS IN THE FORM OF AQUEOUS SUSPENSION BASED UPON MICROCAPSULATED SOLUTION OF CHLOROPYRIFOS Russian patent published in 2003 - IPC

FIELD: protection against domestic insects. SUBSTANCE: for the purpose to develop microcapsules, 50%-solution of active insecticide substance as chloropyrifos in xylene or butyl acetate should be supplemented with polyisocyanate, then obtained solution is mixed in aqueous dispersion medium containing 0.5% polyvinyl alcohol in distilled water, for 5- 20 min to obtain microemulsion at particles size being 1 mcm; then mixing should be carried out slowly to obtain microemulsion particles at size of 2-20 mcm. Then, for the purpose to develop microcapsular membrane one should introduce polyethylene polyamine solution in water at decreasing mixing rate, moreover the ratio of polyisocyanate dissolved in capsulated solution and polyethylene polyamine dissolved in aqueous dispersion medium corresponds to 20 : 1.5. EFFECT: higher efficiency. 2 tbl