BR112021012509A2 - SUNSCREEN COMPOSITION, SUNSCREEN COMPOSITION USE AND SUNSCREEN COMPOSITION MANUFACTURING PROCESS - Google Patents

Abstract

sunscreen composition, use of sunscreen composition and manufacturing process of sunscreen composition. the present invention is directed to novel sunscreen compositions, comprising (a) a stabilizing surfactant system comprising at least one anionic surfactant and at least one nonionic surfactant; (b) organic uv filters; and (c) uncoated pigments. The composition of the present invention is stable over time, it also features a high level of UV protection in order to protect the skin from sun damage, easy application, good spreadability, less shine, which does not melt at high temperatures on the face, evens out the skin tone, has an imperceptible and dry touch and combines high protection with softness for the skin.

Description

“SUNSCREEN COMPOSITION, USE OF THE COMPOSITION OF SUNSCREEN AND SUNSCREEN COMPOSITION MANUFACTURING PROCESS" FIELD OF THE INVENTION

[001] The present invention is directed to new sunscreen compositions with high SPF and sensory dry touch to the skin, uses of said sunscreen composition and a manufacturing process of the sunscreen compositions.

BACKGROUND OF THE INVENTION

[002] Photoprotection of keratinous materials, including skin and hair, is considered of great importance in order to protect from sun damage, sunburn, photoaging, as well as decrease the chances of developing skin cancer caused by exposure to ultraviolet radiation. (“UV”). There are typically two types of UVA/UVB sunscreen compositions used to perform photoprotection, namely inorganic UV filters and organic UV filters.

[003] The degree of UV protection provided by a sunscreen composition is directly related to the amount and type of UV filters contained therein. The greater the amount of UV filters, the greater the degree of UV protection (UVA/UVB).

[004] In particular, sunscreen compositions should provide good protection from the sun, a measure of which is the Sun Protection Factor (SPF) value, but have satisfactory sensory perception, such as a smooth but non-greasy feel. , in the application. However, this combination of properties has been difficult to achieve, particularly as many active sunscreen compounds have an oily or greasy feel, and increasing their content tends to make the final product suffer.

[005] In addition, most organic sunscreen filters are oil-like and/or oil-soluble materials. High levels of sunscreen filters in sunscreen products make the products less attractive for their greasy feel on the skin, stickiness, long drying time and leave a shiny residue on the skin after application.

[006] Additionally, an important problem with sunscreen compositions is that due to the large amount of sunscreen filters associated with a large amount of pigments and other additional ingredients to ensure good sensoriality in the O/W emulsion, they tend to be unstable. .

[007] Pigments are essential raw material to give an additional characteristic to the sunscreen composition, which is the uniformity of the skin tone and, consequently, the appearance of the skin. However, this association of pigments with a sunscreen composition results in a highly complex challenge to stabilize the emulsion.

[008] The challenge of formulating a sunscreen composition with large amounts of UV filters, pigments and other additional ingredients associated with the unique sensory described above is that such a composition tends to be unstable and ineffective.

[009] Therefore, a stable sunscreen composition is desired, associated with easy application, good spreadability, less shine, that does not melt at high temperatures on the face, has an imperceptible and dry touch, high SPF values, provides the ideal balance. between hydration and oil control, it evens out the skin tone and combines high protection with smoothness to the skin.

[010] Thus, the inventors were able to overcome the problems of the prior art and surprisingly revealed a stable sunscreen composition, even at high concentrations of pigments and filters.

Organic UV, having a pleasant light and sensory sensation through a specific stabilizing surfactant system comprising at least one anionic surfactant and at least one non-ionic surfactant, organic UV filters and pigments.

BRIEF DESCRIPTION OF THE INVENTION

[011] The present invention is directed to novel sunscreen compositions comprising (a) a stabilizing surfactant system comprising at least one anionic surfactant and at least one nonionic surfactant, (b) organic UV filters and (c) uncoated pigments.

[012] The composition of the present invention is stable over time, it also features a high level of UV protection in order to protect the skin from sun damage, easy application, good spreadability, less shine, which does not melt at high temperatures in the face, evens out the skin tone, has an imperceptible and dry touch and combines high protection with softness for the skin.

BRIEF DESCRIPTION OF THE FIGURES

[013] Figures 1a and 1b show the result of the centrifugation test for a composition according to Example 1 of the present invention.

[014] Figures 2a and 2b show the result of the centrifugation test for a composition according to Example 2 of the present invention.

[015] Figures 3a and 3b show the result of the centrifugation test for a composition according to Example 3 of the present invention.

[016] Figures 4a and 4b show the result of the centrifugation test for a composition according to Example 4 of the present invention.

[017] Figure 5 shows the result of the packaging temperature test for a composition according to Example 1 of the present invention.

[018] Figure 6 shows the result of the packaging temperature test for a composition according to Example 2 of the present invention.

[019] Figure 7 shows the result of the packaging temperature test for a composition according to Example 3 of the present invention.

[020] Figure 8 shows the result of the package temperature test for a composition according to Example 4 of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[021] In one embodiment, the sunscreen composition of the present invention comprises: (a) a stabilizing surfactant system comprising at least one anionic surfactant and at least one nonionic surfactant; (b) organic UV filters; and (c) uncoated pigments.

[022] The composition according to the invention, presents a sensorial performance to the dry touch, as well as a strong and robust stability of the composition over time, even in high concentrations of pigments and organic UV filters.

[023] In a preferred embodiment, the amount of stabilizing surfactant system in the composition of the present invention is ranging from about 1% to 10% by weight, and preferably from about 1.5% to about 8% by weight, more preferably from about 1.5% to about 6% by weight, including all ranges and subranges therebetween, based on the total weight of the composition.

[024] The stabilizing surfactant system of the present invention comprises at least one anionic surfactant in an amount ranging from about 0.1% to about 8% by weight, and preferably from about 0.1% to about 5% by weight, more preferably from about 0.1% to about 3% by weight, including all ranges and subranges therebetween, based on the total weight of the composition.

[025] In a preferred embodiment, the anionic surfactants of the present invention are selected from disodium ethylene diocamide PEG-15 disulfate, glyceryl stearate citrate and mixtures thereof.

[026] In a preferred embodiment, the stabilizing surfactant system of the present invention comprises at least one non-ionic surfactant in an amount ranging from about 0.1% to about 9.5% by weight, preferably from 0 .5% to about 7% by weight, more preferably from about 1% to about 5% by weight, including all ranges and subranges therebetween, based on the total weight of the composition.

[027] In a preferred embodiment, the nonionic surfactants of the present invention are selected from polyglyceryl-3 dicitrate/stearate, polyglyceryl-3 methylglucose distearate, arachidyl alcohol, behenyl alcohol, arachidyl glycoside, ceteareth-25 and mixtures of the same.

[028] The amount of organic UV filters in the sunscreen composition of the invention preferably ranges from about 3% to about 50% by weight, preferably in an amount from about 5% to about 40% by weight, more preferably from about 7% to about 30% by weight, most preferably from about 10% to about 25% by weight, based on the total weight of the composition.

[029] In a preferred embodiment, the UV filters of the present invention are selected from the group consisting of butyl methoxydibenzoylmethane, ethylhexyl salicylate, ethylhexyl triazone, octocrylene, homosalate and mixtures thereof.

[030] The amount of uncoated pigments in the sunscreen composition of the invention preferably ranges from about 0.1% to about 20% by weight, more preferably from about 0.5% to about 10% by weight, and more preferably from about 1% to about 10% by weight, based on the total weight of the composition.

[031] In a preferred embodiment, the uncoated pigments of the present invention are selected from the group of metal oxide pigments such as titanium dioxide, zinc oxide, titanium oxide, iron oxide, iron oxide. zirconium and cerium oxide, or mixtures thereof.

[032] The sunscreen composition of the invention is in the form of an oil-in-water (O/W) emulsion and can be used as a daily skin care product.

[033] The pH of the sunscreen composition according to the present invention is generally between 4 and 6.

[034] In another preferred embodiment, the composition of the present invention has an SPF of 30, 50, 60, 70 or 90.

[035] Therefore, the composition of the present invention features a high level of UV protection in order to protect the skin from sun damage, easy application, good spreadability, less shine, which does not melt at high temperatures on the face, has an imperceptible touch and dry and combines high protection with gentleness to the skin. Furthermore, the composition of the present invention is stable over time and exhibits enhanced emulsion stability.

[036] In another preferred embodiment, the present invention relates to the use of a composition to manufacture a product to prevent sunburn, which can be used as a daily sun protection product.

[037] The present invention is also related to a process for manufacturing a sunscreen composition that provides the consumer with the properties described above.

[038] The manufacturing process of the sunscreen composition of the present invention comprises the following steps: (a) preparation of an oil phase by mixing the organic UV filters, the uncoated pigments and the stabilizing surfactant system, in which the oil phase is heated until complete homogenization; and (b) adding an aqueous phase to the oil phase of step (a) with stirring until complete emulsion formation.

[039] In a particular embodiment, the aqueous phase of step (b) is prepared by mixing water and at least one additional ingredient.

[040] In another particular embodiment, step (a) of the process of the present invention further comprises mixing at least one additional ingredient.

[041] Preferably, the at least one additional ingredient of steps (a) and (b) is selected from the group consisting of inorganic UV filters, coated pigments, perfume/fragrance, preservative agents, solvents, actives, fatty compounds , vitamins, fillers, silicones and polymers.

TERMS

[042] As used in this document, the expression “at least” means one or more and therefore includes individual components as well as mixtures/combinations.

[043] Except in operational examples, or where otherwise indicated, all numbers expressing amounts of ingredients and/or

or process conditions shall be understood to be modified in all cases by the term "about", meaning within +/- 5% of the number indicated.

[044] As used herein, all tracks provided are intended to include each specific track within and combination of sub-tracks between the given tracks. Thus, a range of 1-5 specifically includes 1, 2, 3, 4, and 5, as well as sub-ranges such as 2-5, 3-5, 2-3, 2-4, 1-4, etc. All ranges and values disclosed in this document are inclusive and combinable. For example, any value or point described herein that falls within a range described herein may serve as a minimum or maximum value for deriving a sub-range, etc.

TENSO-ACTIVE STABILIZER SYSTEM

[045] The stabilizing surfactant system of the present invention comprises at least one anionic surfactant and at least one non-ionic surfactant.

ANIONIC SURFACTANTS

[046] Anionic surfactants means a surfactant which comprises, as ionic or ionizable groups, only anionic groups.

These anionic groups are preferably selected from the groups CO2H, CO2-, SO3H, SO3-, OSO3H, OSO3-O2PO2H, O2PO2H and O2PO22-.

[047] Non-limiting anionic surfactant(s) that can be used in the present invention are selected from the group comprising alkyl sulfates, alkyl ether sulfates, alkyl starch ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates, sulfonates, such as alkylsulfonates, alkylamide sulfonates, alkylarylsulfonates, alpha-olefin sulfonates, paraffin sulfonates, sulfosuccinates, alkylsulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccinates, alkyl sulfoacetates, acylsarcosinates, acylglutamates, alkylsulfosuccinamates, taurates, and N-acyl N-

methyltaurates, isethionates, N-acylisethionates, N-acyltaurates, phosphates and alkyl phosphates, salts of alkyl monoesters and polyglycoside-polycarboxylic acids, acylactylates, mixed esters of organic acids with glycerol, such as glyceryl stearate citrate and glyceryl stearate lactate, salts D-galactoside uronic acids, alkyl ether carboxylic acid salts, alkyl aryl carboxylic ether acid salts, and alkyl starch ether carboxylic acid salts; or the unsalified forms of all such compounds, the alkyl and acyl groups of all such compounds containing from 6 to 24 carbon atoms, and the aryl group denoting a phenyl group. Some of these compounds may be oxyethylenated and then preferably comprise from 1 to 50 ethylene oxide units.

[048] Other examples of anionic surfactants also comprise the dimeric surfactant of formula (I), described in WO 96/14926: in which: R1 and R3 independently denote an alkyl radical containing from 1 to 25 atoms of carbon; R2 denotes a spacer consisting of a straight or branched chain alkylene containing from 1 to 12 carbon atoms; X denotes a -(C2H4O)a-(C3H6O)bZ group; Y denotes a -(C2H4O)c-(C3H6O)dZ group; where: Z denotes a hydrogen atom group or a -CH2-COOM, -SO3M, -P(O)(OM)2, -C2H4SO3M, or -C3HsSO3M radical, where M & M' represent H or an alkali metal or alkaline earth metal or ammonium or alkanolammonium ion,

a and c independently range from 0 to 15, b and d independently range from 0 to 10, and the sum of a + b + c + d ranges from 1 to 25; and n varies from 1 to 10.

[049] A surfactant of this type is, in particular, the one identified by the name INCI: PEG-15 disodium dicocamide disulfate, having the following structure: where RCO represents a coconut fatty acid radical at + n has an average value of 15.

[050] In a preferred embodiment, the anionic surfactants of the present invention are selected from disodium ethylene diocamide PEG-15 disulfate, glyceryl stearate citrate and mixtures thereof.

NON-IONIC SURFACTANTS

[051] Non-limiting examples of non-ionic surfactants useful in the present invention include, for example, alkyl- and polyalkyl- glycerol esters, such as polyglyceryl-3 dicitrate/stearate, mixtures of alkyl- and polyalkyl- glycerol esters. with polyglyceryl, such as polyglyceryl-3-methylglucose distearate, oxyalkylened (more particularly polyoxyethylenated) fatty acid esters of glycerol; oxyalkylenated fatty acid esters of sorbitan; esters of oxyalkylenated (oxyethylenated and/or oxypropylene) fatty acids; ethers of oxyalkylenated (oxyethylenated and/or oxypropylene) fatty alcohols; sugar esters, for example sucrose stearate; fatty alcohol, fatty alcohol ethers of sugars, especially alkyl polyglycosides (APGs), such as decyl glycoside, lauryl glycoside, cetostearyl glycoside optionally as a mixture with cetostearyl alcohol and also arachidyl glycoside, for example in the form of an arachidyl alcohol mixture, behenyl alcohol and arachidyl glycoside. According to a particular embodiment of the invention, the mixture of the alkyl polyglycoside as defined above with the corresponding fatty alcohol may be in the form of a self-emulsifying composition. Mention may also be made of lecithins and derivatives (e.g. Biophilic), sugar esters and sodium stearoyl lactylate.

[052] In a preferred embodiment, the nonionic surfactants of the present invention are selected from polyglyceryl-3 dicitrate/stearate, polyglyceryl-3 methylglucose distearate, arachidyl alcohol, behenyl alcohol, arachidyl glycoside, cetearet-25, and mixtures thereof.

ORGANIC UV FILTERS

[053] The organic UV filters used in the composition of the present invention are selected from the group consisting of oil-soluble organic sunscreen ingredients and water-soluble organic sunscreen ingredients. Suitable non-limiting organic UV filters of the present invention may be as follows.

OIL SOLUBLE ORGANIC SUNSCREEN INGREDIENT

[054] The “oil-soluble organic sunscreen ingredient” means any organic compound for filtering UV radiation, which can be fully dissolved in molecular form or miscible in an oil phase or which can be dissolved in colloidal form (e.g. in micellar form) in a fatty phase of the oil.

[055] Non-limiting examples of oil-soluble organic sunscreen ingredients useful in the invention include, for example, cinnamic derivatives; anthranilates; salicylic derivatives; dibenzoyl methane derivatives; camphor derivatives; benzophenone derivatives; diphenylacrylate derivatives; triazine derivatives; benzotriazole derivatives; benzalmalonate derivatives, especially those recited in US patent 5624663; benzimidazole derivatives; imidazolines; bis-benzoazolyl derivatives as described in EP 669323 and US 2463264; p-aminobenzoic acid (PABA) derivatives; methylene bis(hydroxyphenylbenzotriazole) derivatives as described in applications US 5237071, US 5166355, GB 2303549, DE 19726184 and EP 893119; benzoxazole derivatives as described in patent applications EP 0832642, EP 1027883, EP 1300137 and DE 10162844; filter polymers and filter silicones, such as those described especially in patent application WO 93/04665; alkyl-styrene-derived dimers such as those described in patent application DE 19855649; 4,4-diarylbutadienes, such as those described in patent applications EP 0967200, DE 19746654, DE 19755649, EP-A-1008586, EP 1133980 and EP 1133981, merocyanine derivatives such as those described in patent applications WO 04/ 006878, WO 05/058269 and WO 06/032741; and mixtures thereof, the entire contents of patents and patent applications being incorporated by reference in their entirety.

[056] As examples of other suitable oil-soluble organic sunscreen ingredients, mention may be made of those listed here below under their INCI name: CYNAMIC DERIVATIVES:

[057] Examples of suitable cinnamic derivatives include, but are not limited to, ethylhexyl methoxycinnamate, isopropyl methoxycinnamate, isoamyl methoxycinnamate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl ethylhexanoate dimethoxycinnamate.

DIBENZOIL METHANE DERIVATIVES:

[058] Examples of suitable dibenzoyl methane derivatives include, but are not limited to, butyl methoxy dibenzoyl methane and isopropyl dibenzoyl methane.

SALICYLIC DERIVATIVES:

[059] Examples of suitable salicylic derivatives include, but are not limited to, homosalate, ethylhexyl salicylate, dipropylene glycol salicylate and TEA salicylate.

BETA, BETA-DIPHENYLACRYLATE DERIVATIVES:

[060] Examples of suitable beta, beta-diphenylacrylate derivatives include, but are not limited to, octocrylene and ethocrylene.

BENZOPHENONE DERIVATIVES:

[061] Examples of suitable benzophenone derivatives include, but are not limited to, benzophenone-1, benzophenone-2, benzophenone-3 or oxybenzone, benzophenone-4, benzophenone-5, benzophenone-6, benzophenone-8, benzophenone-9, n-hexyl benzophenone-12, 2-(4-diethylamino-2-hydroxybenzoyl)benzoate +" or as a mixture with octyl methoxycinnamate.

BENZYLIDENE CAMPHOR DERIVATIVES:

[062] Examples of suitable benzylidene camphor derivatives include, but are not limited to, 3-benzylidene camphor manufactured, 4-methylbenzylidene camphor, polyacrylamidomethyl benzylidene camphor manufactured.

PHENYLBENZOTRIAZOLE DERIVATIVES:

[063] Examples of suitable phenylbenzotriazole derivatives include, but are not limited to, drometrizole trisiloxane, methylene bis-benzotriazolyl tetramethylbutyl-phenol or in micronized form as an aqueous dispersion.

TRIAZINE DERIVATIVES:

[064] Examples of suitable triazine derivatives include, but are not limited to, bis-ethylhexyloxyphenol methoxyphenyl triazine, ethylhexyl triazone, diethylhexylbutamido triazone, 2,4,6-tris(4'-aminobenzalmalonate, dineopentyl )-s-triazine, 2,4,6-tris(4'-diisobutyl-aminobenzalmalonate)-s-triazine, 2,4-bis(4'-dineopentyl-aminobenzalmalonate)-6-(4'-aminobenzoate n- butyl)-s-

triazine, symmetrical triazine filtering agents described in the US patent

6,225,467, patent application WO 2004/085412 (see compounds 6 and 9) or in the document “Symmetrical Triazine Derivatives” IP.COM Journal, IP.COM Inc., West Henrietta, NY, USA (September 20, 2004) , especially 2,4,6-tris(biphenyl)-1,3,5-triazines (in particular 2,4,6-tris(biphenyl-4-yl)-1,3,5-triazine and 2,4, 6-Tris(terphenyl)-1,3,5-triazine, which is included in patent applications WO 06/035000, WO 06/034982, WO 06/034991, WO 06/035007, WO 2006/034992 and WO 2006/ 034985).

ANTHRANYLIC DERIVATIVES:

[065] An example of a suitable anthranilic derivative includes, but is not limited to, menthyl anthranilate.

IMIDAZOLINE DERIVATIVES:

[066] An example of a suitable imidazoline derivative includes, but is not limited to, ethylhexyl dimethoxybenzylidene dioxoimidazoline propionate.

BENZALMALONATE DERIVATIVES:

[067] An example of a suitable benzalmalonate derivative includes, but is not limited to, polyorganosiloxane containing benzalmalonate functions, for example polysilicone-15.

4,4-DIARYLBUTADIENE DERIVATIVES:

[068] An example of a suitable 4,4-diarylbutadiene derivative includes, but is not limited to, 1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenyl-butadiene.

BENZOXAZOLE DERIVATIVES:

[069] An example of a suitable benzoxazole derivative includes, but is not limited to, 2,4-bis[5-(1-dimethylpropyl)benzoxazol-2-yl-(4-phenyl)imino]-6-(2-ethyl -hexyl)imino-1,3,5-triazine and mixtures thereof.

[070] Preferably, the oil-soluble organic sunscreen ingredient will be selected from butyl methoxy dibenzoyl methane, ethylhexyl salicylate, ethylhexyl triazone, octocrylene, drometrizole trisiloxane, bis-ethylhexyloxyphenol methoxyphenyl triazine and mixtures of the same.

ORGANIC WATER SOLUBLE SUNSCREEN INGREDIENT

[071] The “water-soluble organic sunscreen ingredient” means any organic compound for filtering UV radiation, which can be fully dissolved in molecular form or miscible in a liquid aqueous phase or which can be dissolved in colloidal form (e.g. , in micellar form) in a liquid aqueous phase.

[072] Non-limiting examples of water-soluble organic sunscreen ingredients useful in the invention include, for example, terephthalylidene dicamphor sulfonic acid (Ecamsule), phenylbenzimidazole sulfonic acid (Ensulizole), benzophenone-4, aminobenzoic acid (PABA), polyethoxyethyl ester 4-bis(polyethoxy)-para-aminobenzoic acid (PEG-25 PABA), benzalkonium camphor methosulfate, methylene bis-benzotriazolyl tetramethylbutylphenol (Bisoctrizole), disodium phenyl dibenzimidazole tetrasulfonate (Disodium bisdisulizol) and tris-biphenyl triazine; their derivatives and corresponding salts; naphthalene bisimide derivatives, such as those described in European patent application EP 1990372 A2, the entire contents of which are incorporated herein by reference; and cationic quaternary cinnamido amine salts and derivatives, such as those described in United States patent 5,601,811, the entire contents of which are incorporated herein by reference, and mixtures thereof.

[073] The salts of the compounds which can be used according to the invention are selected in particular from alkali metal salts, for example sodium or potassium; alkaline earth metal salts, for example calcium, magnesium or strontium; metallic salts, for example zinc, aluminum, manganese or copper; ammonium salts of the formula NH4+; quaternary ammonium salts; organic amine salts, for example methylamine salts,

dimethylamine, trimethylamine, triethylamine, ethylamine, 2-hydroxyethylamine, bis(2-hydroxyethyl)amine or tris(2-hydroxyethyl)amine; lysine or arginine salts. Salts selected from sodium, potassium, magnesium, strontium, copper, manganese or zinc salts are preferably used. The sodium salt is preferably used.

[074] Preferably, the water-soluble organic sunscreen ingredient will be selected from terephthalylidene dicamphor sulfonic acid, methylene bis-benzotriazolyl tetramethylbutylphenol and mixtures thereof.

UNCOATED PIGMENTS

[075] Suitable pigments used in the sunscreen composition of the present invention are uncoated pigments.

[076] In a preferred embodiment, the uncoated pigments used in the sunscreen composition of the present invention are selected from the group consisting of metal oxide pigments such as titanium dioxide, zinc oxide, titanium, iron oxide, zirconium oxide and cerium oxide, or mixtures thereof.

ADDITIONAL INGREDIENTS

[077] In addition to the essential components described above, the composition of the invention may further comprise any usual cosmetically acceptable ingredient, which may be specially selected from such as inorganic UV filters, coated pigments, perfume/fragrance, preservatives, solvents, actives , fatty compounds, vitamins, fillers, silicones, polymers and mixtures thereof.

[078] One skilled in the art will be careful to select the optional additional ingredients and/or the amount thereof, so that the advantageous properties of the composition according to the invention are not, or are not substantially, adversely affected by the envisaged addition. .

[079] Suitable coated pigments are more particularly silica-coated titanium oxides, such as the product, silica and iron oxide, silica and alumina, alumina, such as the products, alumina and aluminum stearate, alumina and aluminum laurate , iron oxide and iron stearate, zinc oxide and zinc stearate, silica, alumina and silicone, silica, alumina, aluminum and silicone stearate, alumina and silicone, etc.

[080] Mixtures of metal oxides may also be mentioned, especially titanium dioxide and cerium dioxide, including the equiponderal silica-coated mixture of titanium dioxide and cerium dioxide, as well as the mixture of titanium oxide and carbon dioxide. zinc coated with alumina-silica and silicone, or the mixture of titanium dioxide and zinc dioxide coated with alumina, silica and glycerin.

[081] Suitable polymers include, but are not limited to, aluminum starch octenylsuccinate, xanthan gum, poly C10-30 alkyl acrylate, acrylates/C10-30 alkyl acrylate crosspolymer, styrene/acrylates copolymer and mixtures thereof.

[082] The composition may also comprise at least one silicon ingredient, which may be dimethicone and caprylyl methicone, among others.

[083] Non-limiting examples of a preservative agent that can be used in accordance with the invention include phenoxyethanol.

[084] Suitable fillers of the invention can be, as examples of fillers that absorb oil: mica, silica, Zea mays (corn) starch, magnesium oxide, nylon-12, nylon-66, cellulose, polyethylene, talc, talc (e) methicone, talc (and) dimethicone, perlite, sodium silicate, pumice, PTFE, polymethyl methacrylate, Oryza sativa (rice) starch, aluminum octenylsuccinate starch, modified potato starch, alumina, silica silylate, sodium calcium borosilicate, magnesium carbonate, hydrated silica, dimethicone/vinyl dimethicone crosspolymer, sodium carboxylmethyl starch.

[085] Suitable solvents include, but are not limited to, water, alcohols, glycols and polyols such as glycerin, water, caprylyl glycol, pentylene glycol, propylene glycol, butylene glycol, C12-15 alkyl benzoate and mixtures thereof.

[086] In various embodiments, the solvent is present in a concentration of from about 15 to 100% by weight, or from about 20 to about 85% by weight, or from about 30 to about 75% by weight. weight, or from about 35 to about 75% by weight, or preferably from about 40 to about 75% by weight, and more preferably from about 45 to about 75% by weight, including ranges and subranges between the same, based on the total weight of the combinations and/or compositions of the present invention.

[087] Suitable additional actives include, but are not limited to, disodium EDTA, triethanolamine and mixtures thereof.

[088] Examples of fatty or oily materials include, but are not limited to, esters, fatty acids, synthetic oils, and hydrocarbons/paraffins such as stearyl alcohol, myristic acid, palmitic acid, mineral oil from silicones, vegetable/plant oils, and mixtures of the same.

[089] Non-limiting example of vitamins suitable for the composition of the present invention include tocopherol.

[090] Examples of silicones used in the composition of the present invention are, but are not limited to, dimethicone and caprylyl methicone.

[091] Examples of polymers include, but are not limited to, aluminum octenylsuccinate starch, xanthan gum, acrylates/C10-30 alkyl acrylate crosspolymer, and styrene/acrylates copolymer.

[092] Additional ingredients may represent from 60% to 85%, such as from 60% to 80% or, such as from 65 to 80% by weight of the total weight of the composition of the invention.

[093] By way of non-limiting illustration, the invention will now be described with reference to the following examples.

EXAMPLES EXAMPLES 1 TO 4

[094] Suitable compositions according to the present invention are Examples 1 to 4, as follows: INGREDIENT FUNCTION EX. 1 (%) EX. 2 (%) EX. 3 (%) EX. 4 (%) titanium dioxide 5.5 6 3 6 iron oxides 0.22 0.11 0.39 0.83 pigments iron oxides 1.14 1.34 1.22 0.88 iron oxides 0.053 0.101 0.078 0.043 homosalate 2.5 5 4 7 ethylhexyl salicylate 3 2.5 1.5 1 octocrylene 1 3 2 5 UV filter butyl methoxydibenzoyl 7 4 5 6 methane ethylhexyl triazone 4.5 3 8 4.5 0.30 dicitrate/stearate 0.83 1.44 - polyglyceryl-3 stearate citrate 0.42 1.15 - 1.23 glyceryl arachidyl glycoside 0.183 - 0.83 - arachidyl alcohol 0.27 - 0.39 - behenyl alcohol surfactant 0.09 - 0.68 - cetearet-25 0.50 0.98 0.75 1.93 polyglyceryl-3 distearate 0.60 - - 0.83 methylglucose disulfate ethylene PEG-15 dicocamide 0.31 0.42 0.95 0 .43 disodium compounds xanthan gum 1.2 0.4 0.95 0.35 additional phenoxyethanol 0.6 1.1 0.55 0.9

INGREDIENT FUNCTION EX. 1 (%) EX. 2 (%) EX. 3 (%) EX. 4 (%) C12-15 alkyl benzoate 18.4 21.8 20.3 20.2 Caprylyl glycol 0.5 0.2 0.3 0.4 water water Q.S. Q.S. Q.S. Q.S.

EXAMPLES 5 TO 11

[095] Comparative compositions are as in Examples 5 to 11, as follows: EX. 5 EX. 6 EX. 7 EX. 8 EX. 9 EX. 10 EX. 11

INGREDIENT FUNCTION (%) (%) (%) (%) (%) (%) (%) pigment iron oxides 9 9 9 9 9 9 9 homosalate 5 5 5 5 5 5 5 ethylhexyl salicylate 3 3 3 3 3 3 3 octocrylene 4 4 4 4 4 4 4 UV filter butyl methoxydibenzoyl methane 6 6 6 6 6 6 6 ethylhexyl triazone 1.7 1.7 1.7 1.7 1.7 1.7 1.7 terephthalylidene acid dicamphor 0, 3 0.3 0.3 0.3 0.3 0.3 0.3 sulfonic peg-90 4 - - - - - - sucrose laurate - 4 - - - - - potassium cetyl phosphate - - - - - - 4 sodium lauroyl glutamate - - - 4 - - - sodium cocoyl glutamate surfactant - - - - 0.5 - - disodium cocoyl glutamate - - - - 1.06 - - dilauramidoglutamide lysine - - - - - 1.4 - sodium butylene glycol - - - - - 0.5 - xanthan gum 0.8 0.8 0.8 0.8 0.8 0.8 0.8 Ingredient Caprylyl Glycol 0.5 0.5 0.5 0.5 0 .5 0.5 0.5 s phenoxyethanol 0.5 0.5 0.5 0.5 0.5 0.5 0.5 additional acrylates cross polymer/ - - 5 - - - - c10-30 alkyl acrylate C12-15 alkyl benzoate 7 7 7 7 7 7 7 water water QS Q.S. Q.S. Q.S. Q.S. Q.S. Q.S.

EXAMPLE 12

[096] The compositions according to examples 1 to 4 were prepared according to the following steps:

Step (a): prepare an oil phase by mixing the UV filters, pigments, surfactants, C12-15 alkyl benzoate and xanthan gum until total homogenization; Step (b): Prepare an aqueous phase by mixing the water, caprylyl glycol and phenoxyethanol; and Step (c): Add the aqueous phase of step (b) to the oil phase of step (a), mixing until the complete formation of the emulsion.

EXAMPLE 13

[097] To demonstrate the emulsion stability of the composition according to the present invention, two different stability tests were performed.

TEST 1 - CENTRIFUGE TEST

[098] The first test was a centrifugation of the compositions according to examples 1 to 4, with temperature variation to predict the phase separation, at low and high centrifugation speeds (between 500 and 5000 rpm). After centrifugation, the stability of the compositions is visually and analytically evaluated.

[099] The results of the centrifugation tests are shown in Figures 1 to 4, respectively, for examples 1 to 4, where "a" indicates the result of the visual evaluation and "b" the analytical data of the stability index along of time. It can be seen that the sunscreen compositions according to the present invention did not show phase separation in the visual assessment and exhibited low rates of instability during centrifugation.

TEST 2 - PACKAGING TEMPERATURE TEST

[0100] The second test was performed with the packaged sunscreen compositions of examples 1 to 4, in which the stability of the emulsion was visually evaluated after the packages were subjected to temperature variations between 4 °C and 60 °C.

The package temperature test results are shown in Figures 5 to 8, respectively,

for examples 1 to 4. It can be seen that, even at high temperatures, the compositions according to the present invention did not show phase separation.

Claims (19)

1. SUNSCREEN COMPOSITION, characterized by comprising: (a) a stabilizing surfactant system comprising: (i) at least one anionic surfactant selected from the group consisting of: alkyl sulfates, alkyl ether sulfates, alkylamido ether sulfates, alkylaryl polyether sulfates, monoglyceride sulfates, sulfonates, such as alkylsulfonates, alkylamide sulfonates, alkylarylsulfonates, alpha-olefin sulfonates, paraffin sulfonates, sulfosuccinates, alkylsulfosuccinates, alkyl ether sulfosuccinates, alkylamide sulfosuccinates, alkylsulfoacetates, acylsarcosinates, acylglutamates, alkylsulfosuccinamates, taurates, N. and N-acyltaurates, isethionates, N-acylisethionates, phosphates and alkyl phosphates, salts of alkyl monoesters and polyglycoside-polycarboxylic acids, acylactylates, mixed esters of organic acids with glycerol, such as glyceryl stearate citrate and glyceryl stearate lactate, salts of D-galactoside uronic acids, salt s of alkyl ether carboxylic acids, salts of alkyl aryl ether carboxylic acids, and salts of alkylamido ether carboxylic acids; or the unsalified forms of all such compounds, the alkyl and acyl groups of all such compounds containing from 6 to 24 carbon atoms, and dimeric anionic surfactants represented by formula (I): where: R1 and R3 independently denote from each other, an alkyl radical containing from 1 to 25 carbon atoms; R2 denotes a spacer consisting of a straight or branched chain alkylene containing from 1 to 12 carbon atoms; X denotes a -(C2H4O)a-(C3H6O)bZ group; Y denotes a -(C2H4O)c-(C3H6O)dZ group; where: Z denotes a hydrogen atom group or a -CH2-COOM, -SO3M, -P(O)(OM)2, -C2H4SO3M, or -C3HsSO3M radical, where M & M' represent H or a metal alkali or alkaline earth metal or ammonium or alkanolammonium ion, a and c, independently of each other, range from 0 to 15, b and, independently of each other, range from 0 to 10, and the sum of a + b + c + d ranges from 1 to 25; and n ranges from 1 to 10; and (ii) at least one nonionic surfactant selected from the group consisting of: alkyl- and polyalkyl- esters of glycerol, mixtures of alkyl- and polyalkyl- esters of glycerol with polyglyceryl, oxyalkylenated fatty acids of glycerol esters ; oxyalkylenated fatty acids from sorbitan esters; ester oxyalkylenated fatty acids; oxyalkylenated fatty alcohol of ethers, sugar esters, fatty alcohols, fatty alcohol ethers of sugars; (b) organic UV filters; and (c) uncoated pigments. 2. SUNSCREEN COMPOSITION according to claim 1, characterized in that it comprises from 1% to 10% by weight of stabilizing surfactant system, including all bands and sub-bands therebetween, based on the total weight of the composition. 3. SUNSCREEN COMPOSITION, according to claim 1, characterized in that the stabilizing surfactant system comprises at least one anionic surfactant in an amount ranging from 0.1% to 8% by weight, including all ranges and subranges therebetween , based on the total weight of the composition. 4. SUNSCREEN COMPOSITION, according to claim 1, characterized in that the stabilizing surfactant system comprises at least one non-ionic surfactant in an amount ranging from 0.1% to 9.5% by weight, including all ranges and subranges between them, based on the total weight of the composition. 5. SUNSCREEN COMPOSITION, according to claim 1, characterized in that organic UV filters in the sunscreen composition vary from 3% to 50% by weight, based on the total weight of the composition. A SUNSCREEN COMPOSITION according to claim 1, characterized in that the amount of uncoated pigments in the sunscreen composition of the invention varies from 0.1% to 20% by weight, based on the total weight of the composition. A SUNSCREEN COMPOSITION according to claim 1, characterized in that at least one anionic surfactant is selected from the group consisting of glyceryl stearate citrate and disodium ethylene diocamide PEG-15 disulfate. A SUNSCREEN COMPOSITION according to claim 1, characterized in that at least one non-ionic surfactant is selected from the group consisting of polyglyceryl-3 dicitrate/stearate, polyglyceryl-3 methyl glucose distearate, arachidyl alcohol, alcohol behenyl, arachidyl glycoside and ceteareth-25. A SUNSCREEN COMPOSITION according to claim 1, wherein the organic UV filters are selected from the group consisting of oil-soluble organic sunscreen ingredients and water-soluble organic sunscreen ingredients. 10. SUNSCREEN COMPOSITION, according to claim 9, characterized in that oil-soluble organic sunscreen ingredients are selected from the group consisting of cinnamic derivatives, anthranilates, salicylic derivatives; dibenzoylmethane derivatives, camphor derivatives; benzophenone derivatives; diphenylacrylate derivatives; triazine derivatives; benzotriazole derivatives; benzalmalonate derivatives, benzimidazole derivatives; imidazolines; bis-benzoazolyl derivatives; p-aminobenzoic acid (PABA) derivatives; methylene bis(hydroxyphenylbenzotriazole), benzoxazole derivatives and mixtures thereof. 11. SUNSCREEN COMPOSITION according to claim 9, characterized in that the water-soluble organic sunscreen ingredients are selected from the group consisting of terephthalylidene dicamphor sulfonic acid, phenylbenzimidazole sulfonic acid, benzophenone-4, aminobenzoic acid, ester 4-bis(polyethoxy)-para-aminobenzoic acid polyethoxyethyl, camphor benzalkonium methosulfate, methylene bis-benzotriazolyl tetramethylbutylphenol, disodium phenyl dibenzimidazole tetrasulfonate and tris-biphenyl triazine; their derivatives and corresponding salts; and mixtures thereof. A SUNSCREEN COMPOSITION according to claim 1, characterized in that the uncoated pigments are selected from the group consisting of metal oxide pigments such as titanium dioxide, zinc oxide, titanium oxide, iron, zirconium oxide and cerium oxide, or mixtures thereof. 13. SUNSCREEN COMPOSITION, according to claim 1, characterized in that it further comprises additional ingredients selected from inorganic UV filters, coated pigments, perfume/fragrance, preservatives, solvents, actives, fatty compounds, vitamins, fillers, silicones , polymers and mixtures thereof. A SUNSCREEN COMPOSITION according to claim 1, characterized in that it is in the form of an O/W emulsion. 15. USE OF SUNSCREEN COMPOSITION, as defined in claim 1, characterized in that it is for the manufacture of a product to be used as a daily sun protection product. 16. MANUFACTURING PROCESS OF SUNSCREEN COMPOSITION, as defined in claim 1, characterized in that it comprises the following steps: (a) preparation of an oil phase by mixing organic UV filters, uncoated pigments and the stabilizing surfactant system, in which the oil phase is heated until complete homogenization; and (b) adding an aqueous phase to the oil phase of step (a) with stirring until complete emulsion formation. Process according to claim 16, characterized in that the aqueous phase is prepared by mixing water and at least one additional ingredient. Process according to claim 16, characterized in that step (a) further comprises mixing at least one additional ingredient. Process according to any one of claims 17 to 18, characterized in that at least one additional ingredient is selected from the group consisting of inorganic UV filters, coated pigments, perfume/fragrance, preservatives, solvents, actives, compounds fatty acids, vitamins, fillers, silicones and polymers.