Patent ID: 7426948

Claim:
A method of preserving wood comprising: adding a particulate organic biocide product to water to form an injectable slurry; and injecting the injectable slurry into wood, thereby obtaining a wood product with the particulate organic biocide product dispersed therein, wherein the particulate organic biocide product is prepared by a method comprising: providing a solid subbstantially water-insoluble organic biocide selected from the group consisting of imidazolinones, sulfonylureas, triazolopyrimidine sulfonamides, aryloxyphenoxy propionates, triazines, chloroacetanilides, pyrazoles and diphenyl ethers; an aqueous liquid comprising a surface-active agent; and a milling media to a mill, wherein the milling media comprises an effective amount of milling beads having a density of about 3.5 grams/cm 3 or greater, and a diameter between about 0.1 mm and about 0.8 mm; and milling the organic biocide, aqueous liquid and milling media for a time sufficient to obtain a milled organic biocide product having a mean volume particle diameter d 50 of about 0.05 microns to about 1 micron and a d 90 , such that 90 volume percent of the product has a diameter of the d 90 or less, of less than about 3 times the d 50 .