Process for preparing pesticidal, especially insecticidal, microparticles in which the active material is at least partially water soluble, by polycondensation in a two phase liquid system

• Main Authors: VANDENABEELE MARIE, BORNET GERARD, JOSSELIN PIERRE, JONCHERAY GERARD, EVERAERE KATHELYNE
• Format: Patent
• Language: English; French
• Published: 13.08.2004
• Edition: 7
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; PERFORMING OPERATIONS; PEST REPELLANTS OR ATTRACTANTS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; THEIR RELEVANT APPARATUS; TRANSPORTING; TRAPPING

Preparing pesticidal microparticles in which the pesticide is partially water-soluble, comprises polycondensation of organic reactants R 1> and R 2> in a liquid two phase system, R 1> being placed in a polar liquid (P) and R 2> being placed in an oily liquid (O) itself comprising a solvent (S) that is not miscible with (P), and a surfactant which allows formation of a dispersion of (P) in (O). Process for preparing pesticidal microparticles in which the pesticide is at least partially water-soluble, comprising polycondensation of complementary organic reactants R 1> and R 2> in a liquid two phase system, R 1> being placed in a polar liquid (P) and R 2> being placed in an oily liquid (O) itself comprising a solvent (S) that is not miscible with (P), and a surfactant which allows formation, under agitation, of a dispersion of (P) in (O) under conditions such that R 1> and R 2> polycondense in (P). Procédé de fabrication de microbilles d'un pesticide au moins partiellement soluble dans l'eau par polycondensation de réactifs organiques complémentaires R1 et R2 dans un système biphasique liquide, le ou les réactif(s) R1 étant placé(s) avec le pesticide dans une phase liquide polaire ( p) et le ou les réactif(s) R2 étant placé(s) dans une phase liquide huileuse ( h) comprenant un solvant (S) non miscible à la phase polaire et au moins un agent tensio-actif permettant sous agitation la mise en dispersion de la phase polaire ( p) dans ladite phase huileuse ( h), caractérisé en ceque le couple de réactifs R1 et R2 est choisi de telle sorte que la polycondensation se produit dans la phase liquide polaire ( p)