Patent ID: 6242007
Filing Date: 2001-06-05
Classification: A01N,A61K,A61P,A61Q,C07D

Abstract:
A method for producing non-spherical and/or non-platelet particles of pyrithione salt selected from the group consisting of rods, needles, cylinders, cones, ellipsoids, prisms, parallelepipeds, pyramids, tetrahedrons, hexahedrons, octahedrons, dodecahedrons, icosahedrons, and combinations thereof, comprising reacting pyrithione acid or a water-soluble salt of pyrithione and a polyvalent water-soluble metal salt selected from the group consisting of zinc salts, tin salts, cadmium salts, bismuth salts, zirconium salts, magnesium salts, aluminum salts, and combinations thereof, in a carrier and in the presence of an ionic surfactant composition, at a temperature from about 20.degree. C. to about 60.degree. C. and a pH between 4 and 9, to produce non-spherical and non-platelet particles of pyrithione salt.