Patent ID: 6844293

Claim:
A method of dispersing an active, water-insoluble, solid agrochemical principal in an aqueous solution comprising the following steps: (i) providing a formulation comprising at least one active, water-insoluble, solid agrochemical principal and at least one dispersant comprising a water-soluble, agriculturally acceptable derivative of an alternating copolymer or an agriculturally acceptable salt thereof wherein said alternating copolymer comprises at least one residue of a first comonomer and at least one residue of a second comonomer, wherein said first comonomer comprises an α,β-unsaturated oxyacid, or an anhydride or other derivative thereof; and said second comonomer comprises an olefinic compound containing one or more polymerizable double bonds, or a derivative thereof; and (ii) dispersing said formulation in an aqueous medium to form a suspension of the active, water-insoluble, solid agrochemical principal; wherein said first comonomer is selected from the group consisting of fumaric acid and anhydride, and the esters, amides and imides derived from them; maleic acid esters, amides and imides; itaconic acid and anhydride and the corresponding esters, amides and imides derived from them; acrylic and methacrylic acids and the corresponding esters and amides derived from them; vinylphosphonic acid and the corresponding esters and amides derived from it; and ethylene sulphonic acid and the esters and amides derived from it.