Patent ID: 6162446
Filing Date: 2000-12-19
Classification: A01N,A61K,A61Q,Y10S

Abstract:
A process for preparing a zinc pyrithione-containing personal care composition which comprises in-situ prepared zinc pyrithione, comprising the step of reacting, in a personal care composition comprising at least one surfactant and having a high viscosity relative to zinc pyrithione in water alone, pyrithione acid or a pyrithione salt other than zinc pyrithione, or a combination thereof, with a zinc compound that is soluble in the personal care composition, said zinc compound being selected from the group consisting of zinc salts of organic acids, zinc salts of inorganic acids, zinc hydroxide, zinc oxide, and combinations thereof, thereby causing in-situ transchelation of the pyrithione acid or pyrithione salt with the zinc salt to form said zinc pyrithione-containing personal care composition, wherein said in-situ prepared zinc pyrithione is stable against settling in said personal care composition.