Improvements relating to biocidal compositions

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/16 (2006.01) A01N 31/16 (2006.01) A61K 31/496 (2006.01) A61K 47/00 (2006.01)

Patent

CA 2656229

The invention provides a solvent-free biocidal composition of improved efficacy comprising at least one water insoluble biocide (preferably a herbicide) and a water-soluble carrier material, wherein the water-insoluble biocide is dispersed through the carrier material in nano-disperse form having a peak diameter of the nano-disperse form below 1000nm. The invention also provides a process which comprises spray drying a solution of the biocide and a solution of a water- soluble carrier to obtain a solvent free dispersion of the biocide in the carrier, which, when dissolved in water, produces a nano-disperse biocide. The invention also provides an aqueous dispersion of a water insoluble biocide and a water-soluble carrier obtained by the dispersion of the composition of the solvent free composition in water.

L'invention concerne une composition de biocide sans solvant d'une efficacité améliorée comprenant au moins un biocide (de préférence un herbicide) insoluble dans l'eau et un excipient soluble dans l'eau, le biocide insoluble dans l'eau étant dispersé dans l'excipient sous forme de nanodispersion présentant un diamètre maximal inférieur à 1000nm. L'invention concerne également un procédé consistant à sécher par pulvérisation une solution de biocide et une solution d'excipient soluble dans l'eau pour obtenir une dispersion sans solvant du biocide dans l'excipient qui, lorsqu'elle est dissoute dans l'eau, produit un biocide nanodispersé. L'invention concerne également une dispersion aqueuse d'un biocide insoluble dans l'eau et d'un excipient soluble dans l'eau obtenue par dispersion de la composition sans solvant dans l'eau.

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