Dual Phase Cosmetic Composition

Abstract

The present invention relates to a liquid dual phase cosmetic or pharmaceutical composition comprising an oil phase and an aqueous phase, the composition containing as a demixing agent a film forming agent such as polyvinylpyrrolidone and derivatives thereof. The compositions of the invention are particularly useful as makeup removers.

1 . A method of demixing a dual phase liquid cosmetic or pharmaceutical composition comprising an aqueous phase and an oil phase, each phase being separate from the other except when mixed at the time of use, comprising the step of adding to one of the phases of the composition as a demixing agent an effective amount of a non-cationic film forming agent.  
   
   
       2 . The method of claim I in which the film forming agent is selected from the group consisting of polyvinylpyrrolidone and copolymers thereof.  
   
   
       3 . The method of  claim 2  wherein the film forming agent is polyvinylpyrrolidolle hexadecene copolymer.  
   
   
       4 . The method of  claim 1  in which the demixing agent is present in an amount of from about 0.001 to about 10 percent by weight of the total composition.  
   
   
       5 . The method of  claim 4  in which the demixing agent is present in an amount of from about 0.01 to about 1 percent by weight of the total composition.  
   
   
       6 . The method of  claim 1  in which the oil phase and aqueous phase are present in a ratio of from about 30:70 to about 70:30, by weight of the total composition.  
   
   
       7 . The method of  claim 6  in which the aqueous phase and oil phase are present in a ratio of from about 40:60 to about 60:40, by weight of the total composition.  
   
   
       8 . A method of demixing a dual phase makeup removal composition comprising an aqueous phase and an oil phase, each phase being separate from the other before and after being mixed at the time of use, comprising the step of adding to the composition as a demixing agent am effective amount of a non-cationic film forming agent selected from the group consisting of polyvinylpyrrolidone and copolymers thereof.  
   
   
       9 . The method of  claim 8  in which the agent is polyvinylpyrrolidone hexadecene copolymer.  
   
   
       10 . The composition of  claim 8  in which the agent is present in an amount of from about 0.001 to about 10 percent by weight of the total composition.  
   
   
       11 . The composition of  claim 10  in which the compound is present in an amount of from about 0.01 to about 1 percent by weight of the total composition.  
   
   
       12 . The composition of  claim 8  in which the oil phase contains a combination of volatile and non-volatile oils.  
   
   
       13 . The composition of  claim 12  in which the amount of volatile oil is about 30 to about 70 percent by weight of the total composition and the amount of non-volatile oil is about 0.1 to about 10 percent by weight of the total composition.  
   
   
       14 . The composition of  claim 12  in which the volatile oil is a volatile hydrocarbon.  
   
   
       15 . The composition of  claim 14  in which the volatile hydrocarbon is isododecane, isohexadecane, or a combination thereof.  
   
   
       16 . The composition of  claim 13  in which the volatile oil comprises both a volatile silicone and a volatile isoparaffin.  
   
   
       17 . The composition of  claim 16  in which the volatile silicone is cyclomethicone and the volatile isoparaffin is a C 16  isoparaffin.  
   
   
       18 . The composition of  claim 12  in which the non-volatile oil comprises a non-volatile silicone.  
   
   
       19 . The composition of  claim 18  in which the silicone is dimethicone.  
   
   
       20 . The composition of  claim 18  which comprises a cyclic silicone present in an amount of about 25 to about 40 percent by weight of the total composition, a C 16  isoparaffin present in an amount of about 15 to about 30 percent by weight of the total composition, and a non-volatile silicone present in an amount of about 0.1 to about 1 percent by weight of the total composition.  
   
   
       21 . The composition of  claim 20  in which the cyclic silicone is cyclomethicone, the isoparaffin is isohexadecane, and the non-volatile silicone is dimethicone.  
   
   
       22 . The composition of  claim 21  which comprises an additional surfactant in an amount of no greater than about 5 percent by weight of the total composition.  
   
   
       23 . The composition of  claim 22  in which the additional surfactant is present in an amount of from about 0.1 to about 1 percent by weight of the total composition.  
   
   
       24 . The composition of  claim 8  in which the oil phase and the aqueous phase are present in a ratio of about 40:60 to about 60:40.  
   
   
       25 . The composition of  claim 12  in which the volatile oil is a volatile hydrocarbon which is isododecane, isohexadecane or a combination thereof.