Stable insecticide containing latexes, method of making and method of distributing insecticide
AssigneeThe Dow Chemical Company
InventorDonald A. Kangas
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Abstract
Stable latexes comprising polymers containing chlorpyrifos or chlorpyrifos-methyl insecticide are prepared by mixing the latex with the insecticide at temperatures of 40.degree. to less than 100.degree. C., with stirring. The polymer granules protect the dissolved insecticide from early leaching or decomposition and prolong the effect and soil penetration of the toxicant.
Claims10
A stable polymer latex comprising chlorpyrifos or chlorpyrifos-methyl dissolved in the polymeric solids of the latex, said polymeric solids comprising polymers and copolymers of styrene, alkyl styrenes, isoprene, butadiene, acrylonitrile, lower alkyl acrylates, vinyl chloride, vinylidene chloride and .alpha.,.beta.-ethylenically unsaturated carboxylic acids, including polymers containing three or more different monomer species copolymerized therein, the sizes of the polymeric particles being in the range of from 0.03 to 20 microns.
Method of making a stable aqueous insecticide dispersion which comprises adding chlorpyrifos or chlorpyrifos-methyl to a polymer latex wherein the polymer solids comprise polymers and copolymers of styrene, alkyl styrenes, isoprene, butadiene, acrylonitrile, lower alkyl acrylates, vinyl chloride, vinylidene chloride and .alpha.,.beta.-ethylenically unsaturated carboxylic acids, including polymers containing three or more different monomer species copolymerized therein, the sizes of the polymeric particles being in the range of from 0.03 to 20 microns, with stirring at a temperature of 40.degree. to less than 100.degree. C.
Method of distributing chlorpyrifos or chlorpyrifos-methyl for the control of soil dwelling insects which comprises applying the chlorpyrifos or chlorpyrifos-methyl to the soil in the form of an aqueous dispersion of polymer particles containing the chlorpyrifos or chlorpyrifos-methyl dissolved therein.
Dependencies are inferred from the claim text.