Stable concentrated pesticidal suspension

A - Human Necessities – 01 – N

Patent

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Details

A01N 57/20 (2006.01) A01N 25/04 (2006.01) A01N 25/30 (2006.01) A01N 37/22 (2006.01) A01N 37/26 (2006.01) A01P 13/00 (2006.01)

Patent

CA 2383763

An emulsifiable pesticidal suspension concentrate composition is provided comprising (a) a pesticidally effective amount of a liquid pesticide of low solubility in water, for example a chloroacetamide herbicide such as acetochlor, (b) a pesticidally effective amount of a solid particulate pesticide, more particularly a salt- forming pesticide, for example a glyphosate herbicide, in solid particulate form, dispersed in the liquid pesticide, (c) a stabilizing amount of a suspension aid, (d) an emulsifying agent in an amount sufficient to emulsify the concentrate composition in a suitable volume of water to form a dilute sprayable composition, and (e) zero to an assay adjusting amount of an inert liquid in which the liquid pesticide is soluble or miscible. The concentrate composition is substantially non-aqueous. The liquid and solid pesticides are selected to be chemically compatible with each other. By substantial elimination of water and inert organic solvents according to the invention, suspension concentrate compositions can be provided having a very high concentration of active ingredients.

Cette invention concerne une composition concentrée faite d'une suspension pesticide émulsifiable comprenant (a) une dose efficace au plan pesticide d'un pesticide à faible hydrosolubilité, par exemple un herbicide à base de chloroacétamide tel qu'un acétochlore ; (b) une dose efficace au plan pesticide d'un pesticide en particules solides, plus précisément un pesticide formant sel, par exemple un herbicide à base de glyphosate sous forme de particules solides, dispersé dans un pesticide liquide : (c) une dose stabilisante d'un agent suspenseur ; (d) un agent émulsifiant en dose suffisante pour émulsifier la composition concentrée dans un volume convenable d'eau en vue d'obtenir une composition diluée vaporisable ; et (e) une dose, allant de zéro à une dose pour réglage de dosage, d'un liquide inerte dans lequel le pesticide liquide est soluble ou miscible. Cette composition concentrée est essentiellement non aqueuse. Les pesticides liquide et solide sont sélectionnés en fonction de leur compatibilité chimique mutuelle. Compte tenu de l'élimination quasi complète d'eau et de solvants organiques inertes selon l'invention, il est possible d'obtenir des compositions concentrées, en suspension, qui renferment une très forte concentration d'ingrédients actifs.

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