High solvent content emulsions

Abstract

A high solvent content emulsion having solvent, functionalized polymer and particles having an isoelectric point below the pH of the emulsion is described. The emulsion yields excellent sensory and deliverability benefits and is suitable for use as a carrier for consumer-based end use compositions.

1 . An emulsion comprising:
 (a) particles having an isoelectric point below a pH of the emulsion;   (b) a functionalized polymer suitable to hydrogen and/or ionically bond to the particles; and   (c) a solvent.   
     
     
         2 . An emulsion according to  claim 1  wherein the particles comprise hydrogen and/or ionic bonding capabilities with the functionalized polymer. 
     
     
         3 . An emulsion according to  claim 1  or  claim 2  wherein the particles comprise at least 0.1% by weight silica. 
     
     
         4 . An emulsion according to any one of the preceding claim wherein the particles comprise pyrogenically produced silica, pyrogenically produced silican comprising at least one group selected from 
       
         
           
           
               
               
           
         
       
     
     
         5 . An emulsion according to any one of the preceding claims wherein the particles have a diameter of less than 3 microns. 
     
     
         6 . An emulsion according to any one of the preceding claims wherein the functionalized polymer has anionic, zwitterionic and/or cationic character. 
     
     
         7 . An emulsion according to any one of the preceding claims wherein the functionalized polymer comprises primary, secondary and/or quaternary amine groups. 
     
     
         8 . An emulsion according to  claim 6  wherein the functionalized polymer is selected from the group consisting of polysiloxane, polyalkylane and polyester each one of which is functionalized with sulfoxarium, phosphorium, carboxylate sulfonate and/or sulfate groups. 
     
     
         9 . An emulsion according to  claim 6  wherein the functionalized polymer comprises groups with N +  and COO − . 
     
     
         10 . An emulsion according to any one of the preceding claims wherein the functionalized polymer comprises polymer of the formulae: 
       
         
           
           
               
               
           
         
         where: 
         each R is independently H, or a C 1-4  alkyl; 
         each R 1  is independently OR or a C 1-4  alkyl; and 
         each x is independently an integer from 1 to 4 and each y is independently an integer to yield a polymer having a molecular weight from 500 to 1 million,
   R 2   a Z 3−a —Si(OSiZ 2 ) n —(OSiZ b R 2   2−b ) m —O—SiZ 3−a —R 2   a   (V)
 
 
         where: 
         Z is hydrogen, phenyl, OH or a C 1 -C 8  alkyl group; 
         each a is independently an integer from 0 to 3; 
         b is an integer from 0 to 1; 
         m and n are integers such that the sum of n+m may vary from 1 to 3,500; and 
         each R 2  is independently a monovalent radical of formula —C q H 2q L where each q is independently a number from 2 to 10 and L is an amine or a quaternized amine group chosen from the groups: 
         —NR 3 —CH 2 —CH 2 —N(R 3 ) 2    
         —N(R 3 ) 2    
         —N ⊕ (R 3 ) 3 A −   
         —N(R 3 )—CH 2 —CH 2 —N + R 3 (H) 2 A − , 
         where: 
         each R 3  is independently hydrogen, phenyl, benzyl or a C 1  to C 12  alkyl; and 
         each A −  is independently fluoride, chloride, bromide or iodide and/or 
       
       
         
           
           
               
               
           
         
         where: 
         each R 4  is independently a C 1  to C 20  alkyl or C 2  to C 20  alkenyl; 
         R 5  is a divalent C 1 -C 18  group; 
         A −  is as previously defined; 
         r is an integer from 2 to 20; and 
         s is an integer from 15 to 75. 
       
     
     
         11 . An emulsion according to any one of  claims 1  to  8  wherein the functionalized polymer is amodimethicone. 
     
     
         12 . An emulsion according to any one of the preceding claims wherein the emulsion further comprises at least one oil and/or fatty acid. 
     
     
         13 . The emulsion according to  claim 12  wherein the oil is pentasiloxane, dimethicone and/or mineral oil, and the fatty acid is octanoic acid. 
     
     
         14 . An emulsion according to  claim 12  or  claim 13  wherein the oil makes up from 3 to 85% by weight of the mixture of oil and functionalized polymer. 
     
     
         15 . An emulsion according to any one of the preceding claims wherein the emulsion comprises at least 20% by weight solvent and the solvent is water. 
     
     
         16 . An emulsion according to any one of the preceding claims wherein the emulsion further comprises carbon black. 
     
     
         17 . An end use composition comprising the emulsion of  claim 1 . 
     
     
         18 . A composition according to  claim 16  wherein the end use composition is topically applied. 
     
     
         19 . A composition according to  claim 17  or  claim 18  wherein the composition further comprises niacinamide, a quaternary ammonium compound or both. 
     
     
         20 . A method for treating a skin condition comprising the step of topically applying the end use composition of any one of  claims 16  to  18  to skin.