Patent ID: 8618022
Filing Date: 2013-12-31
Classification: A01N

Abstract:
1. A process for preparing an aqueous suspension of an organic pesticide compound, which has a solubility in water of not more than 2 g/l at 20° C. and a melting point of not more than 110° C. and which is capable of forming at least one crystalline form, wherein the organic pesticide compound is present in the form of essentially crystalline particles and wherein at least 90% of the pesticide compound, which is present in the aqueous suspension, is in the crystalline state, which process comprises: a) providing an aqueous emulsion of the organic pesticide compound, wherein the organic pesticide compound is present in the form of droplets of an amorphous form of the organic pesticide compound, where the concentration of the organic pesticide compound in the aqueous emulsion is from 10 to 50% by weight, and where the amorphous form is a melt, a supercooled melt or a solid amorphous form, and b) adding an aqueous suspension of said organic pesticide compound, wherein the organic pesticide compound is present in the form of essentially crystalline particles and wherein at least 90% of the pesticide compound, which is present in the aqueous suspension, is in the crystalline state, wherein the addition in step b) is performed at a temperature below the melting temperature of the crystalline form of the organic pesticide compound and where the relative amounts of the aqueous suspension, which is added in step b), and the aqueous emulsion are chosen such that the amount of the organic pesticide compound contained in the aqueous suspension is from 0.01 to 0.3 part by weight, per 1 part by weight of the pesticide compound contained in the aqueous emulsion.