Personal Care Composition with Zinc Phosphate Active

Abstract

A personal care composition, comprising a soluble zinc polyphosphate complex made by combining ingredients comprising an organic zinc salt, a plurality of long chain polyphosphates having 6 or more phosphate polymer units, and an aqueous solvent; wherein the relative amount of organic zinc salt and long chain polyphosphates provides a phosphorus to zinc mole ratio of at least 6:1. Also, a method of using the composition for reducing at least one of perspiration or body odor.

What is claimed is: 
     
         1 . A personal care composition, comprising:
 a soluble zinc polyphosphate complex made by combining ingredients comprising an organic zinc salt, a plurality of long chain polyphosphates having 6 or more phosphate polymer units, and an aqueous solvent;   wherein the relative amount of organic zinc salt and long chain polyphosphates provides a phosphorus to zinc mole ratio of at least 6:1.   
     
     
         2 . The personal care composition of  claim 1 , wherein the zinc polyphosphate complex has the property of reduced solubility in water at a first condition of 37° C. and a pH of about 7.4 in the presence of 1% by weight Bovine Serum Albumin protein when compared with a second condition of 25° C. and a pH of 5.4 in the absence of protein, the reduction in solubility being sufficient to allow a desired amount of the soluble zinc polyphosphate complex in a saturated solution at the second condition to precipitate from the saturated solution at the first condition. 
     
     
         3 . The personal care composition of  claim 1 , wherein the composition is at least one of an antiperspirant or a deodorant. 
     
     
         4 . The personal care composition of  claim 1 , further comprising a protein. 
     
     
         5 . The personal care composition of  claim 1 , wherein the phosphorus to zinc mole ratio ranges from about 15:1 to about 55:1. 
     
     
         6 . The personal care composition of  claim 1 , wherein the zinc ion organic zinc salt complex is a compound chosen from the group comprising zinc lactate, zinc citrate, zinc acetate, zinc gluconate, zinc malate and zinc tartrate. 
     
     
         7 . The personal care composition of  claim 1 , wherein the zinc polyphosphate complex has an average of 18 or more P atoms. 
     
     
         8 . The personal care composition of  claim 1 , wherein the zinc polyphosphate complex has an average of about 1 zinc atom. 
     
     
         9 . A method of depositing zinc to skin and/or hair of a subject, the method comprising:
 providing a personal care composition comprising a soluble zinc polyphosphate complex made by combining ingredients comprising an organic zinc salt, a plurality of long chain polyphosphates having 6 or more phosphate polymer units and an aqueous solvent; and   applying the personal care composition to the skin of the subject;   wherein the relative amount of organic zinc salt and long chain polyphosphates provides a phosphorus to zinc mole ratio of at least 6:1.   
     
     
         10 . The method of  claim 9 , wherein the zinc polyphosphate complex has the property of reduced solubility in water at a first condition of 37° C. and a pH of about 7.4 in the presence of 1% by weight Bovine Serum Albumin protein when compared with a second condition of 25° C. and a pH of 5.4 in the absence of protein, the reduction in solubility being sufficient to allow a desired amount of the soluble zinc polyphosphate complex in a saturated solution at the second condition to precipitate from the saturated solution at the first condition. 
     
     
         11 . The method of  claim 9 , wherein the phosphorus to zinc mole ratio is from about 15:1 to about 55:1. 
     
     
         12 . The method of  claim 9 , wherein the organic zinc salt is a compound chosen from the group comprising zinc lactate, zinc citrate, zinc acetate, zinc gluconate, zinc malate and zinc tartrate. 
     
     
         13 . The method of  claim 9 , wherein the zinc polyphosphate complex has an average of 18 or more phosphate atoms. 
     
     
         14 . The method of  claim 9 , wherein the zinc polyphosphate complex has an average of about 1 zinc atom. 
     
     
         15 . The method of  claim 9 , wherein the personal care composition is at least one of an antiperspirant or a deodorant. 
     
     
         16 . The method of  claim 9 , wherein the method reduces at least one of perspiration and body odor.