Treated silicas and metal silicates for improved cleaning in dentifrice

Abstract

Treated silica materials are disclosed, together with methods of making such materials and dentifrice compositions comprising the treated silica materials.

1 - 20 . (canceled) 
     
     
         21 . A dentifrice composition comprising:
 (i) a precipitated silica material comprising from about 0.5 wt. % to about 10 wt. % of aluminum, and wherein the precipitated silica material is characterized by:   a loss on ignition at 900° C. of less than about 3 wt. %; and   a pellicle cleaning ratio (PCR) at 20% loading of at least 90; and   (ii) one or more dentifrice components selected from an abrasive, a rheological aid, a whitener, a sweetener, a flavoring additive, a surfactant, a colorant, or a combination thereof.   
     
     
         22 . The composition of  claim 21 , wherein the precipitated silica material comprises from about 1 wt. % to about 4 wt. % of aluminum. 
     
     
         23 . The composition of  claim 22 , wherein the composition comprises up to 35 wt. % of the precipitated silica material. 
     
     
         24 . The composition of  claim 21 , wherein the composition comprises up to 30 wt. % of the precipitated silica material. 
     
     
         25 . The composition of  claim 21 , wherein the precipitated silica material is further characterized by an Einlehner abrasion value in a range from 18 to 34.8 mg lost/100,000 revolutions. 
     
     
         26 . The composition of  claim 21 , wherein the precipitated silica material is characterized by a pellicle cleaning ratio (PCR) at 20% loading of from 90 to about 110. 
     
     
         27 . The composition of  claim 26 , wherein the precipitated silica material comprises from about 1 wt. % to about 4 wt. % of aluminum. 
     
     
         28 . The composition of  claim 27 , wherein the composition comprises up to 35 wt. % of the precipitated silica material. 
     
     
         29 . The composition of  claim 26 , wherein the composition comprises up to 30 wt. % of the precipitated silica material. 
     
     
         30 . The composition of  claim 26 , wherein the precipitated silica material is further characterized by an Einlehner abrasion value in a range from 18 to 34.8 mg lost/100,000 revolutions. 
     
     
         31 . A dentifrice composition comprising:
 (i) a precipitated silica material comprising from about 0.5 wt. % to about 10 wt. % of tin, and wherein the precipitated silica material is characterized by:   a loss on ignition at 900° C. of less than about 3 wt. %; and   a pellicle cleaning ratio (PCR) at 20% loading of at least 90; and   (ii) one or more dentifrice components selected from an abrasive, a rheological aid, a whitener, a sweetener, a flavoring additive, a surfactant, a colorant, or a combination thereof.   
     
     
         32 . The composition of  claim 31 , wherein the precipitated silica material comprises from about 1 wt. % to about 4 wt. % of tin. 
     
     
         33 . The composition of  claim 32 , wherein the composition comprises up to 35 wt. % of the precipitated silica material. 
     
     
         34 . The composition of  claim 31 , wherein the composition comprises up to 30 wt. % of the precipitated silica material. 
     
     
         35 . The composition of  claim 31 , wherein the precipitated silica material is further characterized by an Einlehner abrasion value in a range from 18 to 34.8 mg lost/100,000 revolutions. 
     
     
         36 . The composition of  claim 31 , wherein the precipitated silica material is characterized by a pellicle cleaning ratio (PCR) at 20% loading of from 90 to about 110. 
     
     
         37 . The composition of  claim 36 , wherein the precipitated silica material comprises from about 1 wt. % to about 4 wt. % of tin. 
     
     
         38 . The composition of  claim 37 , wherein the composition comprises up to 35 wt. % of the precipitated silica material. 
     
     
         39 . The composition of  claim 36 , wherein the composition comprises up to 30 wt. % of the precipitated silica material. 
     
     
         40 . The composition of  claim 36 , wherein the precipitated silica material is further characterized by an Einlehner abrasion value in a range from 18 to 34.8 mg lost/100,000 revolutions.