Metal salt compositions

Abstract

Described herein are compositions comprising combinations of metal salts, and methods of preparing and using the same.

What is claimed is: 
     
         1 . An oral care composition comprising:
 a first metal salt, having a solubility of greater than 0.001 g/100 mL in water at 20° C.;   a second metal salt, having a solubility of 0.001 g/100 mL, or less, in water at 20° C.; and   a free water content of greater than about 10%, by weight;   
       wherein the first metal salt and the second metal salt are independently selected from a zinc salt, a stannous salt and a copper salt; and 
       wherein the second metal salt is present in an amount effective to provide a synergistic increase in delivery of the metal ion of the first or second metal salt. 
     
     
         2 . The composition of  claim 1 , wherein the first metal salt and the second metal salt are salts of the same metal. 
     
     
         3 . The composition of  claim 1 , wherein the second metal salt is present in an amount effective to provide a synergistic increase in delivery of the metal ion of the first metal salt. 
     
     
         4 . The composition of  claim 1 , wherein the first metal salt is selected from: zinc citrate trihydrate, zinc chloride, zinc lactate, zinc nitrate, zinc acetate, zinc gluconate, zinc glycinate and zinc sulfate. 
     
     
         5 . The composition of  claim 1 , wherein the second metal salt is selected from: zinc oxide, zinc phosphate, zinc pyrophosphate, zinc silicate, zinc oleate, zinc hydroxide, zinc peroxide, and zinc sulfide. 
     
     
         6 . The composition of  claim 1 , comprising:
 from about 0.1 to about 5%, by weight, of said first metal salt; and   from about 0.05 to about 2%, by weight, of said second metal salt.   
     
     
         7 . The composition of  claim 1 , comprising:
 from about 0.5 to about 4%, by weight, of said first metal salt; and   from about 0.1 to about 1.5%, by weight, of said second metal salt.   
     
     
         8 . The composition of  claim 1 , comprising:
 from about 1 to about 3%, by weight, of said first metal salt; and   from about 0.2 to about 0.75%, by weight, of said second metal salt.   
     
     
         9 . The composition of  claim 1 , comprising:
 about 2%, by weight, of said first metal salt; and   about 0.25%, by weight, of said second metal salt.   
     
     
         10 . The composition of  claim 1 , comprising:
 about 2%, by weight, of said first metal salt; and   about 0.5%, by weight, of said second metal salt.   
     
     
         11 . The composition of  claim 1 , further comprising one or more components selected from a fluoride ion source; a tartar control agent; a buffering agent; an antibacterial agent; an abrasive; and a combination of two or more thereof. 
     
     
         12 . The composition of  claim 11 , wherein at least one of the one or more components is a fluoride ion source selected from: stannous fluoride, sodium fluoride, potassium fluoride, sodium monofluorophosphate, sodium fluorosilicate, ammonium fluorosilicate, amine fluoride, ammonium fluoride, and a combination of two or more thereof. 
     
     
         13 . The composition of  claim 11 , wherein at least one of the one or more components is a tartar control agent selected from: sodium tripolyphosphate, sodium tetrapolyphosphate, mono-, di-, tri- and tetrasodium pyrophosphates, sodium trimetaphosphate, sodium hexametaphosphate; potassium tripolyphosphate, potassium tetrapolyphosphate, mono-, di-, tri- and tetrapotassium pyrophosphates, potassium trimetaphosphate, potassium hexametaphosphate; and a combination of two or more thereof. 
     
     
         14 . The composition of  claim 1 , wherein the composition comprises greater than about 15%, by weight, free water. 
     
     
         15 . A method of treating or preventing a disease or condition of the oral cavity comprising contacting an oral cavity surface of a patient in need thereof with the composition of  claim 1 . 
     
     
         16 . The method of  claim 15 , wherein the disease or condition of the oral cavity is halitosis. 
     
     
         17 . The composition of  claim 1 , wherein
 the first metal salt is selected from: zinc citrate trihydrate, zinc chloride, zinc lactate, zinc nitrate, zinc acetate, zinc gluconate, zinc glycinate and zinc sulfate,   the second metal salt is selected from: zinc oxide, zinc phosphate, zinc pyrophosphate, zinc silicate, zinc oleate, zinc hydroxide, zinc peroxide, and zinc sulfide; and,   the composition comprises
 from about 0.1 to about 5%, by weight, of said first metal salt; and 
 from about 0.05 to about 2%, by weight, of said second metal salt. 
   
     
     
         18 . The composition of  claim 17 , wherein the composition comprises greater than about 15%, by weight, free water.