Patent ID: 6488949
Filing Date: 2002-12-03
Classification: A01N

Abstract:
A low viscosity water-based pesticide suspension having inhibited phase separation and inhibited non-uniform distribution of an active ingredient within said water-based pesticide suspension, said active ingredient being a pesticide selected from the group consisting of an insecticide, a fungicide and a herbicide, said pesticide suspension comprising:a. from about 0.003% to about 50% by weight of said pesticide, wherein said pesticide is a friable solid which is capable of being fractured or shattered into small particles, said pesticide having a melting point of less than about 60Â° C. and a water solubility of no more than about 1000 ppm at about 40Â° C., which said pesticide is resistant to Ostwalds ripening and crystal growth and is resistant to hydrolysis or degradation in an aqueous environment; b. from about 0.5% to about 10% by weight of a wetting agent selected from the group consisting of sodium naphthalene formaldehyde condensate and ethoxylated polyoxypropylene; c. from 0.0% to about 0.8% by weight of a thickener selected from the group consisting of xanthan gum and hydroxypropyl methylcellulose; d. from about 0.1% to about 0.5% by weight of an antimicrobial agent selected from the group consisting of 1,2-benzisothiazolin-3-one, 2-methyl-4-isothiazolin-3-one and, 5-chloro-2-methyl-4-isothiazolin-3-one; e. from about 5% to about 20% by weight of an anti-freeze agent selected from the group consisting of dipropylene glycol, glycerine, hexylene glycol, and propylene glycol; f. from about 1% to about 8% by weight of an hydrophobic silica wherein said hydrophobic silica is a hydrophilic fumed silica treated with dimethyldichlorosilane; and g. from about 40% to about 95% by weight of water, wherein said pesticide suspension has a viscosity of less than about 900 cps.