Melt processing of phosphoroamido(di)thioate insecticides

A - Human Necessities – 01 – N

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A01N 25/12 (2006.01) A01N 57/26 (2006.01) A01N 57/28 (2006.01)

Patent

CA 2660390

An insecticide solid or particulate is produced from a phosphoroamido(di)thioate insecticide such as acephate. The particulate insecticide is formed by melting the insecticidal solids in a substantially oxygen-free, and preferably moisture free, atmosphere to prevent oxygen entrainment in the resulting melt to inhibit later degradation upon storage. The melt is formed into granules, extrudates, prills, flakes, shaped briquettes, or other shapes as desired.

Selon l'invention, une matière solide ou particulaire insecticide est produite à partir d'un insecticide à base de phosphoroamido(di)thioate tel que l'acéphate. L'insecticide particulaire est formé par fusion de solides insecticides dans une atmosphère sensiblement exempte d'oxygène et, de préférence, exempte d'humidité, ce qui permet de prévenir l'entraînement d'oxygène dans la matière fondue résultante et d'empêcher une dégradation ultérieure pendant le stockage. La matière fondue est formée en granules, en extrudats, en perles, en flocons, en briquettes formées ou en particules de formes différentes selon les besoins.

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