Stable cosmetic emulsion with polyamide gelling agent

Abstract

The present invention relates to a gelled cosmetic emulsion comprising an oil phase, an aqueous phase and a gelling system which contains at least one non-siloxane based polyamide in a sufficient amount to gel the emulsion. The polyamide can have an tertiary amide, ester, acid, or amine terminal end group. The emulsion is stabilized with an alkylene oxide containing emulsion stabilizer. The polyamide resin is stabilized with a resin stabilizer containing an atom with a certain electronegativity. The emulsions of the present invention are substantially transparent and when colorants are added the color is especially bright and clear. The emulsions are used in lipstick and mascara products as well as other gel and stick products.

1 . A cosmetic composition comprising an emulsion having an aqueous phase and a non-aqueous phase, a substituted alkanolamide neutralized by an acid and a gelling system of at least one non-siloxane based polyamide resin as the primary gelling agent in the non-aqueous phase.  
     
     
         2 . The composition of  claim 1  wherein the composition further comprises a color component.  
     
     
         3 . The composition of  claim 1  wherein the polyamide resin further comprises a terminal end group selected from the group consisting of ester, amine, tertiary-amide and acid.  
     
     
         4 . The composition of  claim 3  wherein the terminal end group is an ester or a tertiary-amide.  
     
     
         5 . The composition of  claim 1  wherein the polyamide resin is present in a gelling sufficient amount.  
     
     
         6 . The composition of  claim 1  wherein the polyamide resin is present in an amount of about 1 to 30 percent by weight of the composition.  
     
     
         7 . The composition of  claim 1  wherein the emulsion further comprises about 0.01 to about 10 percent surfactant.  
     
     
         8 . The composition of  claim 7  wherein the surfactant has an HLB greater than 8.  
     
     
         9 . The composition of  claim 1  wherein the non-aqueous phase further comprises volatile oil.  
     
     
         10 . The composition of  claim 1  in the form of a lipstick or a mascara.  
     
     
         11 . The composition of  claim 1  wherein the acid is a fatty acid.  
     
     
         12 . The composition of  claim 11  wherein the fatty acid is a lauric acid or a stearic acid.  
     
     
         13 . The composition of  claim 1  wherein the substituted alkanolamide has 1 to 18 carbon atoms.  
     
     
         14 . The composition of  claim 13  wherein the substituted alkanolamide neutralized by an acid is stearamide MEA stearate or lauramide MEA stearate.  
     
     
         15 . The composition of  claim 1  wherein the gelling system further comprises at least one alkylene oxide containing emulsion stabilizer.  
     
     
         16 . The composition of  claim 1  wherein the emulsion is wax-free.  
     
     
         17 . The composition of  claim 1  wherein the emulsion is stable.  
     
     
         18 . A cosmetic composition comprising an emulsion having an aqueous phase and a non-aqueous phase, a substituted alkanolamide neutralized by a stearic acid or a lauric acid, at least one alkylene oxide containing emulsion stabilizer, and a gelling sufficient amount of at least one non-siloxane based polyamide resin as the primary gelling agent in the non-aqueous phase, the polyamide resin having terminal end groups selected from the group consisting of ester, amine, tertiary-amide and acid.  
     
     
         19 . The composition of  claim 18  wherein the substituted alkanolamide has 1 to 18 carbon atoms.  
     
     
         20 . The composition of  claim 18  wherein the substituted alkanolamide neutralized by a stearic acid or a lauric acid is stearamide MEA stearate or lauramide MEA stearate.  
     
     
         21 . The composition of  claim 18  wherein the terminal end group is ester or tertiary amide.  
     
     
         22 . The composition of  claim 18  wherein the emulsion is wax-free.  
     
     
         23 . The composition of  claim 18  wherein the emulsion is stable.  
     
     
         24 . The method of making a cosmetic emulsion comprising the steps of adding an alkanolamide having 1 to 18 carbon atoms neutralized by a stearic acid or a lauric acid, a colorant component and a gelling sufficient amount of a non-siloxane based polyamide resin as the primary gelling agent to at least one aqueous phase, and dispersing the aqueous phase with a non-aqueous phase.  
     
     
         25 . The method of  claim 24  wherein the step of dispersing further comprises the aqueous phase as the dispersant phase.  
     
     
         26 . The method of  claim 24  wherein the polyamide further comprises a terminal end group selected from the group consisting of ester, amine, tertiary-amide and acid.  
     
     
         27 . The method of  claim 24  further comprising the step of adding at least one alkylene oxide containing emulsion stabilizer.  
     
     
         28 . The method of  claim 24  wherein the emulsion is wax-free.  
     
     
         29 . The method of  claim 24  wherein the composition is added to a formulation for a mascara or a lipstick.  
     
     
         30 . The method of making a cosmetic emulsion comprising the steps of adding an alkanolamide having 1 to 18 carbon atoms neutralized by a stearic acid or a lauric acid, a colorant component and a gelling sufficient amount of a non-siloxane based polyamide resin as the primary gelling agent to at least one non-aqueous phase, and dispersing an aqueous phase with the non-aqueous phase.  
     
     
         31 . The emulsion of  claim 30  further comprising one or more active ingredients.  
     
     
         32 . The method of  claim 30  wherein the emulsion is wax-free.  
     
     
         33 . A cosmetic composition comprising an emulsion having an aqueous phase and a non-aqueous phase, an alkanolamide of a fatty acid and a gelling system of at least one non-siloxane based polyamide resin as the primary gelling agent in the non-aqueous phase.  
     
     
         34 . The composition of  claim 33  wherein the alkanolamide has 1 to 18 carbon atoms.  
     
     
         35 . The composition of  claim 33  wherein the alkanolamide is stearamide MEA stearate or lauramide MEA stearate.  
     
     
         36 . The composition of  claim 33  wherein the polyamide resin has terminal end groups selected from the group consisting of ester, amine, tertiary-amide and acid.  
     
     
         37 . The composition of  claim 36  wherein the terminal end group is ester or tertiary amide.  
     
     
         38 . The composition of  claim 33  wherein the emulsion is wax-free.  
     
     
         39 . The composition of  claim 33  wherein the emulsion is stable.  
     
     
         40 . The composition of  claim 33  wherein the gelling system further comprises at least one alkylene oxide containing emulsion stabilizer.