Method for producing aqueous suspension concentrate formulations

A method for producing an aqueous suspension concentrate formulation of a compound of formula I in the form of fine particles;

• containing surfactants and water, wherein the surfactants comprises at least one anionic surfactant and at least one nonionic surfactant, wherein the method comprises:
• a) providing an aqueous slurry of the compound of the formula I containing the compound of formula I in the form of coarse particles dispersed in a solution of the at least one surfactant in water;
• b) comminuting the coarse particles in the slurry of the compound of formula I to obtain an aqueous suspension of the compound of the formula I, wherein the particles of the compound of the formula I have a volume average particle size in the range from 3 to 10 μm, as determined by light scattering, wherein step b is performed at a temperature in the range of above 0° C. to 50° C.;
• c) subjecting the suspension obtained in step b to a temperature in the range of 20 to 95° C. for at least 0.5 hrs;
• and
• d) subjecting the suspension of step c) to a comminution to obtain an aqueous suspension of the compound of the formula I, wherein the particles of the compound of the formula I have a volume average particle size of below 3 μm, as determined by light scattering.