Oral Care Compositions and Methods for Increasing Stability of the Same

Abstract

Anhydrous oral care compositions and methods for preventing phase separation in the anhydrous oral care composition are disclosed. The oral care composition may include an orally acceptable vehicle, a thickening system, and a whitening agent. The orally acceptable vehicle may include propylene glycol, and the thickening system may include a polymeric thickener. The polymeric thickener may be or include a copolymer of 2-acrylamidomethylpropanesulphonic acid or a salt thereof.

1 - 17 . (canceled) 
     
     
         18 . An oral care composition, comprising:
 an orally acceptable vehicle;   a thickening system, the thickening system comprising polyacrylate crosspolymer-6; and   a peroxide whitening agent.   
     
     
         19 . The oral care composition of  claim 18 , wherein the peroxide whitening agent is hydrogen peroxide. 
     
     
         20 . The oral care composition of  claim 18 , wherein the peroxide whitening agent is a source of hydrogen peroxide in an amount that provides a concentration of hydrogen peroxide of less than or equal to 4 weight %. 
     
     
         21 . The oral care composition of  claim 18 , further comprising an abrasive. 
     
     
         22 . The oral care composition of  claim 21 , wherein the abrasive comprises calcium pyrophosphate. 
     
     
         23 . The oral care composition of  claim 18 , further comprising an anticalculus agent. 
     
     
         24 . The oral care composition of  claim 23 , wherein the anticalculus agent comprises tetrasodium pyrophosphate. 
     
     
         25 . The oral care composition of  claim 18 , further comprising a humectant. 
     
     
         26 . The oral care composition of  claim 25 , wherein the humectant comprises glycerin. 
     
     
         27 . The oral care composition of  claim 18 , further comprising a surfactant. 
     
     
         28 . The oral care composition of  claim 25 , wherein the surfactant comprises sodium lauryl sulfate. 
     
     
         29 . The oral care composition of  claim 18 , further comprising one or more pyrophosphate salts. 
     
     
         30 . The oral care composition of  claim 29 , wherein the pyrophosphate salts are selected from calcium pyrophosphate and tetrasodium pyrophosphate. 
     
     
         31 . An oral care composition, comprising:
 an orally acceptable vehicle, the orally acceptable vehicle comprising glycerin;   a thickening system, the thickening system comprising polyacrylate crosspolymer-6;   a peroxide whitening agent that is a source of hydrogen peroxide;   an abrasive component comprising calcium pyrophosphate; and   an anticalculus agent comprising tetrasodium pyrophosphate.   
     
     
         32 . The oral care composition of  claim 31 , wherein the source of hydrogen peroxide is present in an amount that provides a concentration of hydrogen peroxide of less than or equal to 4 weight %. 
     
     
         33 . The oral care composition of  claim 32 , further comprising a surfactant. 
     
     
         34 . The oral care composition of  claim 33 , wherein the surfactant comprises sodium lauryl sulfate. 
     
     
         35 . The oral care composition of  claim 31 , wherein:
 the orally acceptable vehicle comprises glycerin;   the thickening system comprises polyacrylate crosspolymer-6;   the source of hydrogen peroxide is present in an amount that provides a concentration of hydrogen peroxide of less than or equal to 4 weight %;   the abrasive is calcium pyrophosphate; and   the anticalculus agent comprises tetrasodium pyrophosphate, and optionally, one or more additional pyrophosphate anticalculus agents.   
     
     
         36 . A method for whitening a tooth of a subject need thereof, comprising contacting an oral cavity surface of said subject with an oral care composition according to  claim 18 . 
     
     
         37 . A method for whitening a tooth of a subject need thereof, comprising contacting an oral cavity surface of said subject with an oral care composition according to  claim 31 .