Method for improving the sensorial properties of oil-in-water emulsions

Abstract

Disclosed is a method for improving the sensorial and/or aesthetic properties of an oil-in-water type emulsion for topical application, the method including an effective quantity of a mixture of saturated cyclic or acyclic, linear or branched hydrocarbons of which at least 95% by weight have between fifteen and nineteen carbon atoms. Also disclosed is a new sun-cream emulsion and the use of same to protect the skin.

1 . A method for improving the sensory and/or esthetic properties of an oil-in-water type emulsion for topical use (E 0 ), said sensory properties being the spreading properties and the consistency and richness properties of said emulsion for topical use (E 0 ), wherein an effective amount of a mixture (M 1 ) of cyclic or acyclic, linear or branched saturated hydrocarbons, among which at least 95% by weight comprise from fifteen to nineteen carbon atoms, is incorporated therein. 
     
     
         2 . The method as defined in  claim 1 , wherein said mixture (M 1 ) comprises, for 100% of its weight:
 a weight proportion of branched alkanes of greater than or equal to 80% and less than or equal to 100%;   a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 15%;   a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 5%;   
       wherein from 95% by weight to 100% by weight of said cyclic or acyclic, linear or branched hydrocarbons comprise from fifteen to nineteen carbon atoms, 
       and wherein up to 5% by weight of said cyclic, acyclic, linear or branched hydrocarbons comprise less than fifteen or more than nineteen carbon atoms. 
     
     
         3 . The method as defined in  claim 1 , wherein said mixture (M 1 ) comprises, for 100% of its weight:
 a weight proportion of branched alkanes of greater than or equal to 40% and less than or equal to 100%, and more particularly greater than or equal to 50% by weight,   a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 20%, and more particularly less than or equal to 15% by weight,   a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 40%, and more particularly less than or equal to 35% by weight,   
       and wherein 100% by weight of said cyclic or acyclic, linear or branched hydrocarbons comprise from fifteen to nineteen carbon atoms. 
     
     
         4 . The method as defined in  claim 1 , wherein the esthetic property is the shininess of said emulsion for topical use (E 0 ). 
     
     
         5 . The method as defined in  claim 1 , wherein the esthetic property is the mattt appearance of the skin noted after the application to the skin of said emulsion for topical use (E 0 ). 
     
     
         6 . The oil-in-water type emulsion for topical use (E) comprising, for 100% of its weight:
 from 50% to 90% by weight of a cosmetically acceptable aqueous phase (A);   from 10% to 50% by weight of a fatty phase (G) comprising, for 100% of its weight:   from 10% to 50% by weight, more particularly from 15% to 40% by weight of a mixture (M 1 ) of saturated cyclic or acyclic, linear or branched hydrocarbons among which at least 95% by weight comprise from fifteen to nineteen carbon atoms;   from 0.5% to 15% by weight of at least one oil-in-water type surfactant;   from 5% to 30% by weight of at least one agent for protection against ultraviolet rays from the sun;   from 0% to 80% by weight of at least one oil and/or one wax, it being understood that such an oil and/or such a wax do not correspond to the definition of the mixture (M 1 ) it being understood that such an oil and/or such a wax do not correspond to the definition of the mixture (M 1 ).   
     
     
         7 . The oil-in-water emulsion for topical use (E) as defined in  claim 6 , wherein the agent for protecting against ultraviolet radiation from the sun is chosen from the elements of the group consisting of titanium dioxide, 2,4-dihydroxybenzophenone, 2-(4-diethylamino-2-hydroxybenzoyl)benzoic acid hexyl ester, Ie 2,4-bis{[4-(2-ethylhexyloxy)-2-hydroxy]phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4,6-tris[4-(2-ethylhexyloxy carbonyl)anilino]-1,3,5-triazine and 2-ethylhexyl dimethoxybenzylidene dioxoimidazolidine propionate. 
     
     
         8 . The oil-in-water emulsion (E) as defined in  claim 6 , wherein said mixture (M 1 ) comprises, for 100% of its weight:
 a weight proportion of branched alkanes of greater than or equal to 80% and less than or equal to 100%,   a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 15%,   a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 5%,   
       wherein from 95% by weight to 100% by weight of said cyclic or acyclic, linear or branched hydrocarbons comprise from fifteen to nineteen carbon atoms and wherein up to 5% by weight of said cyclic, acyclic, linear or branched hydrocarbons comprise less than fifteen carbon atoms or more than nineteen carbon atoms. 
     
     
         9 . The oil-in-water emulsion (E) as defined in  claim 6 , wherein that said mixture (M 1 ) comprises, for 100% of its weight:
 a weight proportion of branched alkanes of greater than or equal to 40% and less than or equal to 100%, and more particularly greater than or equal to 50% by weight,   a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 20%, and more particularly less than or equal to 15% by weight,   a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 40%, and more particularly less than or equal to 35% by weight,   
       and wherein 100% by weight of said cyclic or acyclic, linear or branched hydrocarbons comprise from fifteen to nineteen carbon atoms. 
     
     
         10 . A method for protecting human skin against the unesthetic effects of exposure to ultraviolet radiation from the sun, and more particularly against redness, comprising applying an effective amount of the oil-in-water type emulsion of  claim 6 . 
     
     
         11 . The oil-in-water type emulsion for topical use (E) comprising, for 100% of its weight:
 from 50% to 90% by weight of a cosmetically acceptable aqueous phase (A);   from 10% to 50% by weight of a fatty phase (G) comprising, for 100% of its weight:   from 10% to 50% by weight, more particularly from 15% to 40% by weight of a mixture (M 1 ) of saturated cyclic or acyclic, linear or branched hydrocarbons among which at least 95% by weight comprise from fifteen to nineteen carbon atoms;   from 0.5% to 15% by weight of at least one oil-in-water type surfactant;   from 5% to 30% by weight of at least one agent for protection against ultraviolet rays from the sun;   from 0% to 80% by weight of at least one oil and/or one wax, it being understood that such an oil and/or such a wax do not correspond to the definition of the mixture (M 1 ) it being understood that such an oil and/or such a wax do not correspond to the definition of the mixture (M 1 ), for use thereof in a therapeutic treatment method intended to prevent and/or treat human skin diseases linked to an exposure to ultraviolet radiation from the sun, more particularly burns, sunburn, erythema, skin cancers.   
     
     
         12 . The method as defined in  claim 2 , wherein the esthetic property is the shininess of said emulsion for topical use (E 0 ). 
     
     
         13 . The method as defined in  claim 3 , wherein the esthetic property is the shininess of said emulsion for topical use (E 0 ). 
     
     
         14 . The method as defined in  claim 2 , wherein the esthetic property is the mattt appearance of the skin noted after the application to the skin of said emulsion for topical use (E 0 ). 
     
     
         15 . The method as defined in  claim 3 , wherein the esthetic property is the mattt appearance of the skin noted after the application to the skin of said emulsion for topical use (E 0 ). 
     
     
         16 . The oil-in-water emulsion (E) as defined in  claim 7 , wherein said mixture (M 1 ) comprises, for 100% of its weight:
 a weight proportion of branched alkanes of greater than or equal to 80% and less than or equal to 100%,   a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 15%,   a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 5%,   wherein from 95% by weight to 100% by weight of said cyclic or acyclic, linear or branched hydrocarbons comprise from fifteen to nineteen carbon atoms and wherein up to 5% by weight of said cyclic, acyclic, linear or branched hydrocarbons comprise less than fifteen carbon atoms or more than nineteen carbon atoms.   
     
     
         17 . The oil-in-water emulsion (E) as defined in  claim 7 , wherein said mixture (M 1 ) comprises, for 100% of its weight:
 a weight proportion of branched alkanes of greater than or equal to 40% and less than or equal to 100%, and more particularly greater than or equal to 50% by weight,   a weight proportion of linear alkanes of greater than or equal to 0% and less than or equal to 20%, and more particularly less than or equal to 15% by weight,   a weight proportion of cycloalkanes of greater than or equal to 0% and less than or equal to 40%, and more particularly less than or equal to 35% by weight,   and wherein 100% by weight of said cyclic or acyclic, linear or branched hydrocarbons comprise from fifteen to nineteen carbon atoms.   
     
     
         18 . A method for protecting human skin against the unesthetic effects of exposure to ultraviolet radiation from the sun, and more particularly against redness, comprising applying an effective amount of the oil-in-water type emulsion of  claim 7 . 
     
     
         19 . A method for protecting human skin against the unesthetic effects of exposure to ultraviolet radiation from the sun, and more particularly against redness, comprising applying an effective amount of the oil-in-water type emulsion of  claim 8 . 
     
     
         20 . A method for protecting human skin against the unesthetic effects of exposure to ultraviolet radiation from the sun, and more particularly against redness, comprising applying an effective amount of the oil-in-water type emulsion of  claim 9 .