PROCESS FOR PREPARING COPPER PYRITHIONE

摘要

The present invention relates to a process for producing a gel-free dispersion or solution of copper pyrithione by an ion-exchange reaction using a reaction mixture of a copper salt and a pyrithione salt in the presence of at least one surfactant. Also claimed is the dispersion or solution itself, as well as a solid particulate copper pyrithione composition comprising copper pyrithione particles having a particle shape selected from the group consisting of rods, spheres, needles, platelets and combinations thereof, and optionally containing at least a trace amount of a surfactant on the outer surface of at least a portion of the particles. The products are useful in the manufacture of biocides.