Oral Care Compositions and Methods of Use

Abstract

Disclosed herein are non-aqueous dentifrice compositions comprising (i) a whitening complex comprising crosslinked polyvinylpyrrolidone complexed with hydrogen peroxide; (ii) an off-gas reducing agent selected from sodium sulfate, magnesium sulfate, citric acid and clay; and (iii) an orally acceptable carrier. Methods of making and using the compositions are also provided.

1 . A non-aqueous dentifrice composition comprising:
 (i) a whitening complex comprising cross-linked polyvinylpyrrolidone complexed with hydrogen peroxide;   (ii) an off-gas reducing agent selected from sodium sulfate, magnesium sulfate, citric acid and clay; and   (iii) an orally acceptable carrier.   
     
     
         2 . The dentifrice composition of  claim 1 , wherein said whitening complex is present at 5 to 20% by weight of the total composition weight. 
     
     
         3 . The dentifrice composition of  claim 2 , wherein said off-gas reducing agent is present at 0.02 to 5% by weight of the total composition weight. 
     
     
         4 . The dentifrice composition of  claim 3 , wherein said off-gas reducing agent is present at 0.05% by weight of the total composition weight. 
     
     
         5 . The dentifrice composition of  claim 3 , wherein said off-gas reducing agent is selected from sodium sulfate and magnesium sulfate. 
     
     
         6 . The dentifrice composition of  claim 3 , wherein said off-gas reducing agent is selected from citric acid and clay. 
     
     
         7 . The dentifrice composition of  claim 3 , further comprising a surfactant at 1 to 3% by weight of the total composition weight. 
     
     
         8 . The dentifrice composition of  claim 7 , wherein said surfactant is sodium lauryl sulfate. 
     
     
         9 . The dentifrice composition of  claim 8 , wherein the sodium lauryl sulfate is present at 2% by weight of the total composition weight. 
     
     
         10 . The dentifrice composition of  claim 9 , wherein said orally acceptable carrier comprises a material selected from the group consisting of adhesion agents, surfactants, peroxide activators, solvents, flavorants, sweeteners, colorants, and mixtures thereof. 
     
     
         11 . The dentifrice composition of  claim 10 , further comprising an abrasive. 
     
     
         12 . The dentifrice composition of  claim 11 , wherein said abrasive is present at 10 to 20% by weight of the total composition weight. 
     
     
         13 . The dentifrice composition of  claim 12 , wherein the composition has a pH value between 7 to 9. 
     
     
         14 . The dentifrice composition of  claim 13 , wherein said orally acceptable carrier is at least a flavorant. 
     
     
         15 . The dentifrice composition of  claim 14 , wherein said flavorant is present at 2 to 3% by weight of the total composition weight. 
     
     
         16 . The dentifrice composition of  claim 15 , further comprising additional linear and/or cross-linked polyvinylpyrrolidone. 
     
     
         17 . A method for making a non-aqueous dentifrice composition comprising:
 (i) a whitening complex comprising cross-linked polyvinylpyrrolidone complexed with hydrogen peroxide;   (ii) an off-gas reducing agent selected from sodium sulfate, magnesium sulfate, citric acid and clay; and   (iii) an orally acceptable carrier;   
       said method comprising the steps of: a) mixing i) a whitening agent comprising cross-linked polyvinylpyrrolidone complexed with hydrogen peroxide and ii) an orally acceptable carrier; b) adjusting the pH of the composition to a pH value between 7 to 9; and c) adding an off-gas reducing agent. 
     
     
         18 . The method of  claim 17 , wherein the off-gas reducing agents is selected from sodium sulfate and magnesium sulfate. 
     
     
         19 . The method of  claim 17 , wherein the off-gas reducing agents is selected from citric acid and clay. 
     
     
         20 . A non-aqueous dentifrice composition comprising:
 (i) a whitening complex comprising cross-linked polyvinylpyrrolidone complexed with hydrogen peroxide, wherein the complex is present at 10 to 15 wt %;   (ii) an off-gas reducing agent selected from sodium sulfate, magnesium sulfate, citric acid and clay, wherein the off-gas reducing agent is present at 0.05 wt %;   (iii) linear and/or cross-linked polyvinylpyrrolidone at 1-2 wt %;   (iv) zinc oxide at 1-2 wt %;   (v) fumed silica at 1-2 wt %; and   (vi) an orally acceptable carrier.