Agrochemical suspension formulations

A - Human Necessities – 01 – N

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A01N 25/30 (2006.01) A01N 25/04 (2006.01) A01N 43/70 (2006.01) A01N 47/20 (2006.01) A01N 47/30 (2006.01) A01N 47/38 (2006.01) A01N 59/20 (2006.01)

Patent

CA 2407840

Agrochemical suspension concentrates, particularly in aqueous or liquid oil based medium, comprise solid particles including one or more agrochemical active components; and a dispersing agent including a water soluble or dispersible styrene (meth)acrylic acid copolymer. In particular the styrene (meth)acrylic acid copolymer has a molar ratio of residues of (meth)acrylic acid monomer(s) to styrene monomer(s) from 20:1 to 1:5, particularly from 3:1 to 1:1. The formulation will usually also contain wetting agents; and/or adjuvants. The agrochemical active can be plant growth regulators, herbicides, and/or pesticides, for example insecticides, fungicides, acaricides, nematocides, miticides, rodenticides, bactericides, molluscicides and bird repellants. The suspension formulations will typically be used diluted in water and sprayed onto plants or the soil surrounding the plants.

L'invention concerne des concentrés de suspensions agrochimiques, notamment dans un milieu aqueux ou d'huile fluide, qui contiennent des particules solides renfermant un ou plusieurs constituants agrochimiques actifs ; et un agent de dispersion incluant un copolymère de styrène acide (méth)acrylique soluble ou dispersable dans l'eau. En particulier, le copolymère de styrène acide (méth)acrylique présente un rapport molaire de résidus de monomère(s) d'acide (méth)acrylique sur monomère(s) de styrène compris entre 20:1 et 1:5, notamment entre 3:1 et 1:1. La formulation contient généralement aussi des agents mouillants et/ou des adjuvants. La matière agrochimique active peut être : régulateurs de croissance de plantes, herbicides et/ou pesticides, par exemple insecticides, fongicides, acaricides, nématocides, miticides, rodenticides, bactéricides, molluscicides et avifuges. A l'utilisation, les formulations de suspensions sont généralement diluées dans l'eau et pulvérisées sur des plantes ou sur le sol entourant celles-ci.

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