Cosmetic composition made from ion-exchange resins filled with lipoaminoacids

Abstract

Disclosed is a composition of ion-exchange resins made from a styrene-divinylbenzene copolymer or an acrylic-divinylbenzene copolymer filled with at least one lipoaminoacid with the formula (I), in which R 1 is the chain characterising a fatty acid, saturated or unsaturated, linear or branching, including 7 to 21 atoms of carbon, R 2 is the chain characterising an amino acid and m is between 1 and 50, or a mixture of the compounds with the formula (I).

1 . A cosmetic formulation comprising:
 a composition of ion-exchange resins comprising a styrene/divinylbenzene copolymer or an acrylic/divinylbenzene copolymer loaded with at least one lipoamino acid of formula (I):   
       
         
           
           
               
               
           
         
         in which R 1  represents linear or branched, saturated or unsaturated fatty acid containing from 7 to 21 carbon atoms, R 2  represents an amino acid and m is between 1 and 50, or a mixture of lipoamino acids of formula (I), 
         wherein said formulation has a pH between 5 and 7, and said composition is less than 1.5% of the total weight of said formulation. 
       
     
     
         2 . The formulation as claimed in  claim 1 , the weight of said composition is between 0.5% and 0.8% of the total weight. 
     
     
         3 . The cosmetic formulation as claimed in  claim 1 , wherein said ion-exchange resins contain at least one quaternary ammonium function. 
     
     
         4 . The cosmetic formulation as claimed in  claim 1 , wherein said lipoamino acid is selected from the group consisting of: N-(ω-undecylenoyl) phenylalanine, octanoylglycine, undecylenoyl glycine, palmitoyl proline, dipalmitoyl hydroxyproline, cocoylalanine and palmitoylglycine. 
     
     
         5 . The cosmetic formulation as claimed in  claim 1 , wherein said formulation is in the form of a cream gel, an emulsion, a powder, an aqueous dispersion or an oily dispersion. 
     
     
         6 . The cosmetic formulation as claimed in  claim 2 , wherein said formulation is in the form of a cream gel, an emulsion, a powder, an aqueous dispersion or an oily dispersion. 
     
     
         7 . A method of cosmetic treatment of human skin comprising a step of applying an effective amount of a formulation as defined in  claim 1 . 
     
     
         8 . A method of treatment of human skin comprising a step of applying an effective amount of a formulation as defined in  claim 1 , as an antiwrinkle agent, wherein the lipoamino acid used is chosen from: dipalmitoyl hydroxyproline, cocoylalanine and palmitoylglycine. 
     
     
         9 . A method of treating skin comprising a step of applying an effective amount of a formulation as defined in  claim 1 , as a skin-lightening agent or slimming agent, wherein the lipoamino acid used is chosen from: N-(w-undecylenoyl) phenylalanine and palmitoyl proline. 
     
     
         10 . A process for preparing a composition of ion-exchange resins comprising a styrene/divinylbenzene copolymer or an acrylic/divinylbenzene copolymer loaded with at least one lipoamino acid of formula (I): 
       
         
           
           
               
               
           
         
         in which R 1  represents linear or branched, saturated or unsaturated fatty acid containing from 7 to 21 carbon atoms, R 2  represents an amino acid and m is between 1 and 50, or a mixture of lipoamino acids of formula (I), 
         said process comprising the step: 
         a) bringing an ion-exchange resin based on a styrene/divinylbenzene or styrene/acrylic copolymer containing at least one quaternary ammonium into contact with a solution of lipoamino acid of formula (I). 
       
     
     
         11 . The process as claimed in  claim 10 , wherein step a) is a percolation step wherein said solution of lipoamino acid to be loaded passes through a bed of said resin. 
     
     
         12 . A method of cosmetic treatment of human skin comprising a step of applying an effective amount of a formulation as defined in  claim 2 . 
     
     
         13 . A method of cosmetic treatment of human skin comprising a step of applying an effective amount of a formulation as defined in  claim 5 .