Patent ID: 6416750
Filing Date: 2002-07-09
Classification: A61K,A61Q

Abstract:
A process of making stable antiperspirant active solutions, which process comprises the steps of:(A) preparing an aqueous solution comprising an aluminum-containing antiperspirant active, water, and an anhydrous solvent having a solubility parameter of from about 9 (cal/cm3)0.5 to about 15 (cal/cm3)0.5; (B) spray-drying the aqueous solution to form a solid powder comprising aluminum-containing antiperspirant active and the anhydrous solvent; and (C) dissolving the solid powder in a second anhydrous solvent at a temperature of not more than 85Â° C. the second anhydrous solvent comprising a 1,2-diol solvent having at least 4 carbon atoms, to form a stable anhydrous antiperspirant active solution comprising solubilized aluminum-containing antiperspirant active and the 1,2-diol solvent.