Cosmetic sunscreen compositions and use of a cosmetic sunscreen composition

Abstract

The present invention is directed to a cosmetic sunscreen composition with light sensation and improved SPF, comprising (a) at least one polymer; (b) at least one filler; (c) at least one surfactant; (d) at least one fatty compound; and (e) at least one organic UV filter. The invention is also related to the of the cosmetic sunscreen composition.

Description

[0001] COSMETIC SUNSCREEN COMPOSITIONS AND USE OF A COSMETIC SUNSCREEN COMPOSITION FIELD OF THE INVENTION

[0002] The present invention is directed to a cosmetic sunscreen composition with light sensation and improved SPF, comprising (a) at least one polymer; (b) at least one filler; (c) at least one surfactant; (d) at least one fatty compound; and (e) at least one organic UV filter. The invention is also related to the use of the cosmetic sunscreen composition.

[0003] BACKGROUND OF THE INVENTION

[0004] The photoprotection of keratinous materials, is considered of great importance in order to protect from sun-damage, sunburn, photo-aging, as well as to decrease the chances of skin cancer development caused by exposure to ultraviolet (“UV”) radiation. There are typically two types of UVA / UVB sunscreen compositions used to accomplish photoprotection, namely, inorganic UV filters and organic UV filters.

[0005] Consumers are concerned with the negative effects of the sun exposition, particularly the hazardous effects of exposure to ultraviolet (“UV”) light. Prolonged exposure to sunlight causes damage, such as sunburn, to the skin. When skin is exposed to UV light having a wavelength of from about 290 nm to about 400 nm, longterm damage can lead to serious conditions, such as skin cancer. UV light also contributes to aging by causing free radicals to form in the skin. Free radicals include, for example, singlet oxygen, hydroxyl radical, the superoxide anion, nitric oxide and hydrogen radicals. Free radicals attack DNA, membrane lipids and proteins, generating carbon radicals. These in turn react with oxygen to produce a peroxyl radical that can attack adjacent fatty acids to generate new carbon radicals. This cascade leads to a chain reaction producing lipid peroxidation products. Damage to the cell membrane results in loss of cell permeability, increased intercellular ionic concentration, and decreased ability to excrete or detoxify waste products. The end result is a loss of skin elasticity and the appearance of wrinkles. This process is commonly referred to as photo-aging.

[0006] In this sense, in a skin care regimen, consumers apply cosmetic sunscreen compositions to protect the skin and the perception of the product on the skin is very important. Consumers are increasingly looking for cosmetic sunscreen products that are easy to apply, preferably with fluid / light properties that fit into their photoprotection routing while protect the skin with high degree of UV protection (UVA / UVB).

[0007] This degree of UV protection of a cosmetic sunscreen composition is directly related to the amount and type of UV filters contained therein. The higher the amount of UV filters, the greater the degree of UV protection (UVA / UVB).

[0008] Particularly, sunscreen compositions must provide good protection against the sun, a measure of which is the Sun Protection Factor (SPF) value, yet have satisfactory sensory perception, not greasy feel upon application.

[0009] For said reasons, there is a need to develop new fluid / light cosmetic sunscreen compositions having the properties: high stability, greener ingredients, having good sensory properties, dry effect, having good absorption and spreadability and delivering high SPF.

[0010] The inventors of the present invention have overcome the drawbacks of the state of the art and surprisingly achieved a fluid / light cosmetic sunscreen composition, comprising the properties mentioned above, with high SPF, good sensorial attributes, easy spreadability, light film, right level of radiance and skin feel, more sustainable ingredients and stability comprising: (a) at least one polymer; (b) at least one filler; (c) at least one surfactant; (d) at least one fatty compound; and (e) at least one organic UV filter.

[0011] SUMMARY OF THE INVENTION

[0012] The present invention is directed to new cosmetic sunscreens compositions with light sensation and improved SPF, comprising (a) at least one polymer; (b) at least one filler; (c) at least one surfactant; (d) at least one fatty compound; and (e) at least one organic UV filter, which surprisingly provides an unique lighter and faster absorbing and right level of radiance and skin feel, as well as an increase in the SPF properties in cosmetic sunscreen compositions. The present invention is also related to the use of the cosmetic sunscreen composition as sunscreen daily product.

[0013] Other features and advantages of the present invention will be apparent from the following more detailed description of the desirable embodiments which illustrates, by way of example, the principles of the invention.

[0014] BRIEF DESCRIPTION OF THE DRAWINGS Figures 1A and 1 B show the microscopy analysis of the cosmetic sunscreen composition according to Ex. 1 and the comparative cosmetic sunscreen composition C1 .

[0015] Figure 2A and 2B show the results of the UV light analysis of the cosmetic sunscreen composition according to Ex. 1 and the comparative cosmetic sunscreen composition C1 .

[0016] DETAILED DESCRIPTION OF THE INVENTION

[0017] The cosmetic sunscreen composition with light sensation and improved SPF comprises:

[0018] (a) at least one polymer;

[0019] (b) at least one filler;

[0020] (c) at least one surfactant;

[0021] (d) at least one fatty compound; and

[0022] (e) at least one organic UV filter.

[0023] In a preferred embodiment, the at least one polymer is selected from cetyl hydroxyethylcellulose, dehydroxanthan gum, hydroxyethylcellulose, xanthan gum, potato starch modified, hydroxypropyl starch phosphate, and mixtures thereof.

[0024] In a preferred embodiment, the at least one polymer is present in a concentration ranging from about 0.01 % to about 6.0% by weight, preferably from about 0.05% to about 5.0% by weight, more preferably from about 0.075% to about 2.5% by weight, based on the total weight of the composition.

[0025] In a preferred embodiment, the cetyl hydroxyethylcellulose is present in a range of about 0.005% by weight to about 1 .0% by weight, based on the total weight of the composition.

[0026] In another preferred embodiment, the dehydroxanthan gum is present in a range of about 0.005% by weight to about 1 .0% by weight, based on the total weight of the composition.

[0027] In another preferred embodiment, the hydroxyethylcellulose is present in a range of about 0.005% by weight to about 1 .0% by weight, based on the total weight of the composition.

[0028] In another preferred embodiment, the xanthan gum is present in a range of about 0.005% by weight to about 1.0% by weight, based on the total weight of the composition. In another preferred embodiment, the potato starch modified is present in a range of about 0.005% by weight to about 1.0% by weight, based on the total weight of the composition.

[0029] In another preferred embodiment, the hydroxypropyl starch phosphate is present in a range of about 0.005% by weight to about 1 .0% by weight, based on the total weight of the composition.

[0030] In a preferred embodiment, the at least one filler is selected from cellulose, silica, perlite, silica silylate, aluminum starch octenylsuccinate, and mixtures thereof.

[0031] In a preferred embodiment the at least one filler is present in a concentration ranging from about 0.01 % to about 10.0% by weight, preferably from about 0.05% to about 8.0% by weight, more preferably from about 0.1 % to about 6.0% by weight, based on the total weight of the composition.

[0032] In a preferred embodiment, the at least one surfactant is selected from sodium stearoyl glutamate, cetearyl alcohol and cetearyl glucoside, behenyl alcohol, polyglyceryl-10 laurate, inulin lauryl carbamate, glyceryl stearate and PEG-100 stearate, and mixtures thereof.

[0033] In a preferred embodiment, the at least one surfactant is present in a concentration ranging from about 0.01 % to about 10.0% by weight, preferably from about 0.05% to about 8.0% by weight, more preferably from about 0.075% to about 5.0% by weight, based on the total weight of the composition.

[0034] In a preferred embodiment, the at least one fatty compound is selected from isopropyl myristate, diisopropyl sebacate, dicaprylyl carbonate, dicaprylyl ether, C15-19 alkane, Copernicia cerifera (Carnauba) wax, and mixtures thereof.

[0035] In a preferred embodiment, the at least one fatty compound is present in a concentration ranging from about 0.05% to about 55.0% by weight, preferably from about 0.1 % to about 25.0% by weight, more preferably from about 0.5% to about 20.0% by weight, based on the total weight of the composition.

[0036] In another preferred embodiment, the isopropyl myristate is present in a range of about 0.005% by weight to about 10.0% by weight, based on the total weight of the composition.

[0037] In another preferred embodiment, the diisopropyl sebacate is present in a range of about 0.005% by weight to about 10.0% by weight, based on the total weight of the composition. In another preferred embodiment, the dicaprylyl carbonate is present in a range of about 0.005% by weight to about 10.0% by weight, based on the total weight of the composition.

[0038] In another preferred embodiment, the dicaprylyl ether is present in a range of about 0.005% by weight to about 10.0% by weight, based on the total weight of the composition.

[0039] In another preferred embodiment, the C15-19 alkane is present in a range of about 0.005% by weight to about 10.0% by weight, based on the total weight of the composition.

[0040] In another preferred embodiment, the Copernicia cerifera (Carnauba) wax is present in a range of about 0.005% by weight to about 5.0% by weight, based on the total weight of the composition.

[0041] In a preferred embodiment, the at least one organic UV filter is selected from butyl methoxydibenzoylmethane, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, and mixtures thereof.

[0042] In a preferred embodiment, the at least one organic UV filter is present in a concentration ranging from about 0.2% to about 30.0% by weight, preferably from about 0.5% to about 25.0% by weight, more preferably from about 0.75% to about 20.0% by weight, based on the total weight of the composition.

[0043] In a preferred embodiment, the cosmetic sunscreen composition is free of silicones.

[0044] In a preferred embodiment, the cosmetic sunscreen composition presents a SPF ranging from about 30 to about 80.

[0045] The cosmetic sunscreen composition of the present invention may further comprise additional ingredients such as solvents, preservatives, fragrances, active compounds, or vitamins.

[0046] The cosmetic sunscreen composition of the present invention presents an improved SPF property, which provides several beneficial attributes to the product, including the protection of the skin from damage caused by ultraviolet radiation, known as UVA and UVB rays, as well as visible and infrared light, easy application, good spreadability, less white film, less shine, which does not melt on high temperature in the face, has an imperceptible touch and combines high protection with smoothness to the skin. Also, the composition of the present invention is stable over the time and provides increased film deposition and UV absorption.

[0047] In another preferred embodiment, the present invention is related to the use of the cosmetic sunscreen composition according to the present invention for the manufacture of a product to be used as sunscreen daily product.

[0048] TERMS

[0049] As used herein, the expression “at least” means one or more and thus includes individual components as well as mixtures / combinations.

[0050] Other than in the operating examples, or where otherwise indicated, all numbers expressing quantities of ingredients and / or reaction conditions are to be understood as being modified in all instances by the term “about,” meaning within + / - 10% of the indicated number.

[0051] As used herein, the term “comprising” is to be interpreted as encompassing all specifically mentioned features as well optional, additional, unspecified ones.

[0052] As used herein, the use of the term “comprising” also discloses the embodiment wherein no features other than the specifically mentioned features are present ( / .e., “consisting of”).

[0053] The terms "a," "an," and "the" are understood to encompass the plural as well as the singular.

[0054] As used herein, the phrases “and mixtures thereof,” “and a mixture thereof,” “and combinations thereof,” “and a combination thereof,” “or mixtures thereof,” “or a mixture thereof,” “or combinations thereof,” and “or a combination thereof,” are used interchangeably to denote that the listing of components immediately preceding the phrase, such as “A, B, C, D, or mixtures thereof” signify that the component(s) may be chosen from A, from B, from C, from D, from A+B, from A+B+C, from A+D, from A+C+D, etc., without limitation on the variations thereof. Thus, the components may be used individually or in any combination thereof.

[0055] The term “SPF”, as used herein refers to the “Sun Protection Factor”, which indicates the level of protection against UVB radiation of a product. The SPF indicates the time a person can be exposed to sunlight using sunscreen before getting sunburnt and the time they can be exposed to sunlight without getting sunburnt.

[0056] POLYMERS The cosmetic sunscreen composition according to the present invention comprises at least one polymer.

[0057] The at least one polymer according to the present invention improves the film formed, bringing good sensoriality to the cosmetic sunscreen composition.

[0058] Preferably, the at least one polymer according to the present invention is selected from cetyl hydroxyethylcellulose, dehydroxanthan gum, hydroxyethylcellulose, xanthan gum, potato starch modified, hydroxypropyl starch phosphate, and mixtures thereof.

[0059] FILLERS

[0060] The cosmetic sunscreen composition according to the present invention comprises at least one filler.

[0061] The term “filler” means any colorless or white solid particles of any form that are insoluble and dispersed in the medium of the composition.

[0062] The fillers according to the present invention provides a good sensoriality to the cosmetic sunscreen composition.

[0063] The cosmetic sunscreen compositions according to the invention include a spherical amorphous silica. According to certain embodiments, the mean size of these particles of spherical amorphous silica is less than 15.0 pm and more particularly ranges from 3 to 10 pm. The particles of spherical amorphous silica useful according to the invention are colorless or white solid particles of any form, which are in a form that is insoluble and dispersed in the medium of the composition. The spherical amorphous silica may be coated with a hydrophobic treatment agent, although in certain embodiments it is free from such coatings.

[0064] The “silica silylate” according to the present invention is hydrophobic silica aerogels, as described in WO 2021 / 016680. The term "hydrophobic silica" means any silica whose surface is treated with silylating agents, for example, halogenated silanes, such as alkylchlorosilanes, siloxanes, in particular dimethylsiloxanes, such as hexamethyldisiloxane, or silazanes, so as to functionalize the OH groups with silyl groups Si-Rn, for example, trimethylsilyl groups. Preparation of hydrophobic silica aerogel particles that have been surface-modified by silylation, is found in U.S. Patent No. 7,470,725, incorporated herein by reference. In one embodiment, hydrophobic silica aerogel particles surface-modified with trimethylsilyl groups are desirable.

[0065] Non-limiting examples powdered fillers useful in the invention include, for example, talc, mica, silica, silica silylate, cellulose, magnesium aluminum silicate, kaolin, bentone, calcium carbonate, magnesium hydrogen carbonate, hydroxyapatite, boron nitride, perlite powders, fluorphlogopite, sericite, calcinated talc, calcinated mica, calcinated sericite, synthetic mica, lauroyl lysine, metal soap, bismuth oxychloride, barium sulfate, magnesium carbonate, aluminum starch octenylsuccinate, and mixtures thereof. Powdered filters do not include powdered pigments.

[0066] Preferably, the fillers according to the present invention are selected from cellulose, silica, perlite, silica silylate, aluminum starch octenylsuccinate, and mixtures thereof.

[0067] SURFACTANTS

[0068] The cosmetic sunscreen composition according to the present invention comprises at least one surfactant.

[0069] Preferably, the surfactants according to the present invention are selected from sodium stearoyl glutamate, cetearyl alcohol and cetearyl glucoside, behenyl alcohol, polyglyceryl-10 laurate, inulin lauryl carbamate, glyceryl stearate and PEG-100 stearate, and mixtures thereof.

[0070] Additional Surfactants

[0071] Non-limiting examples of additional anionic surfactants for the embodiment of the present invention are selected from the group comprising alkyl sulfates, alkyl phosphates, alkyl ether sulfates, alkyl ether phosphates, 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, 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, acyllactylates, salts of D- galactoside uronic acids, salts of alkyl ether carboxylic acids, salts of alkyl aryl ether carboxylic acids, and salts of alkylamido ether carboxylic acids; or the non-salified forms of all of these compounds, the alkyl and acyl groups of all of these 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.

[0072] Non limiting examples of non-ionic surfactants for the embodiment of the present invention are, for example, alkyl- and polyalkyl- esters of glycerol, such as polyglyceryl-3 dicitrate / stearate, mixtures of alkyl- and polyalkyl- esters of glycerol with polyglyceryl, such as polyglyceryl-3 methylglucose distearate, oxyalkylenated (more particularly polyoxyethylenated) fatty acid esters of glycerol; oxyalkylenated fatty acid esters of sorbitan; oxyalkylenated (oxyethylenated and / or oxypropylenated) fatty acid esters; oxyalkylenated (oxyethylenated and / or oxypropylenated) fatty alcohol ethers; sugar esters, for instance sucrose stearate; fatty alcohol ethers of sugars, especially alkyl polyglucosides (APGs) such as decyl glucoside, lauryl glucoside, cetostearyl glucoside, optionally as a mixture with cetostearyl alcohol, and also arachidyl glucoside, for example in the form of a mixture of arachidyl alcohol, behenyl alcohol and arachidyl glucoside. According to one particular embodiment of the invention, the mixture of the alkyl polyglucoside 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.

[0073] FATTY COMPOUNDS

[0074] The cosmetic sunscreen composition according to the present invention comprises at least one fatty compound.

[0075] The at least one fatty compound according to the present invention provides a good spreadability.

[0076] Preferably, the at least one fatty compound according to the present invention is selected from isopropyl myristate, diisopropyl sebacate, dicaprylyl carbonate, dicaprylyl ether, C-15-19 alkane, such as C15-C16 and C17-C18 branched alkanes, Copernicia cerifera (Carnauba) wax, and mixtures thereof.

[0077] Further to the preferential fatty compounds, the composition of the present invention may comprise diisopropyl adipate, isononyl isononanoate, caprylic / capric triglyceride, isopropyl lauroyl sarcosinate, dibutyl adipate, isoamyl caprate-caprylate, and mixtures thereof.

[0078] ORGANIC UV FILTERS

[0079] The cosmetic sunscreen composition according to the present invention comprises at least one organic UV filter.

[0080] According to the present invention, UV filters are compounds that are active in the UV-A and / or UV-B region. The organic UV filter may be hydrophilic and / or lipophilic.

[0081] Organic LIV Filters Preferably, the organic UV filters according to the present invention are selected from butyl methoxydibenzoylmethane, ethylhexyl triazone, bisethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, and mixtures thereof.

[0082] Additional Organic UV Filters

[0083] Additional organic UV filters can be selected from the group consisting of anthranilic compounds; dibenzoylmethane compounds; cinnamic compounds; salicylic compounds; camphor compounds; benzophenone compounds; |3,|3-diphenylacrylate compounds; triazine compounds; benzotriazole compounds; benzalmalonate compounds; benzimidazole compounds; imidazoline compounds; bis-benzoazolyl compounds; p-aminobenzoic acid (PABA) compounds; methylenebis(hydroxyphenylbenzotriazole) compounds; benzoxazole compounds; dimers derived from a-alkylstyrene; 4,4-diarylbutadienes compounds; guaiazulene and derivatives thereof; rutin and derivatives thereof; flavonoids; bioflavonoids; oryzanol and derivatives thereof; quinic acid and derivatives thereof; phenols; retinol; cysteine; aromatic amino acids; peptides having an aromatic amino acid residue; and mixtures thereof.

[0084] Mention may be made, as examples of the organic UV filter(s), of those denoted below under their INCI names, and mixtures thereof. Anthranilic compounds: Menthyl anthranilate. Dibenzoylmethane compounds: isopropyl dibenzoylmethane. Cinnamic compounds: Ethylhexyl methoxycinnamate; isopropyl methoxycinnamate; isopropoxy methoxycinnamate; isoamyl methoxycinnamate; cinoxate (2-ethoxyethyl- 4-methoxy cinnamate); DEA methoxycinnamate; diisopropyl methylcinnamate; and glyceryl ethylhexanoate dimethoxycinnamate. Salicylic compounds: Homosalate (homomentyl salicylate); ethylhexyl salicylate; glycol salicylate; butyloctyl salicylate; phenyl salicylate; dipropyleneglycol salicylate; and TEA salicylate. Camphor compounds, in particular, benzylidenecamphor derivatives: 3-benzylidene camphor; 4- methylbenzylidene camphor; benzylidene camphor sulfonic acid; camphor benzalkonium methosulfate; terephthalylidene dicamphor sulfonic acid; and polyacrylamidomethyl benzylidene camphor. Benzophenone compounds: Benzophenone-1 (2,4-dihydroxybenzophenone); benzophenone-2

[0085] (Tetrahydroxybenzophenone); Benzophenone-3 (2-hydroxy-4- methoxybenzophenone) or oxybenzone; benzophenone-4 (hydroxy methoxy benzophonene sulfonic acid); benzophenone-5 (Sodium hydroxymethoxy benzophenone Sulfonate); benzophenone-6 (dihydroxy dimethoxy benzophenone); benzophenone-8; benzophenone-9 (Disodium dihydroxy dimethoxy benzophenonedisulfonate); and benzophenone-12, and n-hexyl 2-(4-diethylamino-2- hydroxybenzoyl)benzoate. [3,[3-Diphenylacrylate compounds: Octocrylene; and Etocrylene. Triazine compounds: Diethylhexyl butamido triazone; 2,4,6- tris(dineopentyl 4'-aminobenzalmalonate)-s-triazine. Benzotriazole compounds, in particular, phenylbenzotriazole derivatives: 2-(2H-benzotriazole-2-yl)-6-dodecyl-4- methylpheno, branched and linear; and those described in USP 5240975. Benzalmalonate compounds: Dineopentyl 4'-methoxybenzalmalonate. Benzimidazole compounds, in particular, phenylbenzimidazole derivatives: Phenylbenzimidazole sulfonic acid, and disodium phenyl dibenzimidazole tetrasulfonate. Imidazoline compounds: Ethylhexyl dimethoxybenzylidene dioxoimidazoline propionate. Bis- benzoazolyl compounds: the derivatives as described in EP-669,323 and U.S. Pat. No. 2,463,264. Para-aminobenzoic acid compounds: PABA (p-aminobenzoic acid), ethyl PABA, Ethyl dihydroxypropyl PABA, pentyl dimethyl PABA, ethylhexyl dimethyl PABA, glyceryl PABA, and PEG-25 PABA. Methylene bis-(hydroxyphenylbenzotriazol) compounds, such as 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-methyl-phenol], 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(l,l,3,3-tetramethylbutyl)phenol], and the derivatives as described in U.S. Pat. Nos. 5,237,071 and 5, 166,355, GB-2,303,549, DE-197,26, 184, and EP-893,119, and Drometrizole trisiloxane. Benzoxazole compounds: 2,4-bis[5-l(dimethylpropyl)benzoxazol-2-yl-(4-phenyl)imino]-6-(2- ethylhexyl)imino-l,3,5-triazine

[0086] It is in some embodiments desirable that the organic UV filter(s) can be selected from the group consisting of: ethylhexyl methoxycinnamate, homosalate, ethylhexyl salicylate, octocrylene, phenylbenzimidazole sulfonic acid, benzophenone- 3, benzophenone-4, benzophenone-5, n-hexyl 2-(4-diethylamino-2- hydroxybenzoyl)benzoate, l,r-(l,4-piperazinediyl)bis[l-[2-[4-(diethylam ino)-2- hydroxybenzoyl]phenyl]-methanone 4-methylbenzylidene camphor, terephthalylidene dicamphor sulfonic acid, disodium phenyl dibenzimidazole tetrasulfonate, diethylhexyl butamido triazone, 2,4,6-tris(dineopentyl 4'-aminobenzalmalonate)- s-triazine, 2,4,6- tris(diisobutyl 4'-aminobenzalmalonate)-s-triazine, 2,4-bis-(n-butyl 4' aminobenzalmalonate)-6- [(3-{1 ,3 ,3 ,3 -tetramethyl- 1 - [(trimethylsilyloxy] - disiloxanyl}propyl)amino]-s-triazine, 2,4,6-tris-(di-phenyl)-triazine, 2,4,6-tris-(ter- phenyl)-triazine, methylene bis-benzotriazolyl tetramethylbutylphenol, drometrizole trisiloxane, dineopentyl 4'-methoxybenzalmalonate, l,l-dicarboxy(2,2'-dimethylpropyl)- 4,4-diphenylbutadiene, 2,4-bis[5-l (dimethylpropyl) benzoxazol-2-yl-(4-phenyl)imino]- 6-(2-ethylhexyl)imino-l,3,5-triazine, camphor benzylkonium methosulfate, and mixtures thereof.

[0087] ADDITIONAL INGREDIENTS

[0088] The cosmetic sunscreen composition according to the present invention may also comprise any other additional ingredient that is usually used in the field of sunscreen products, in particular sunscreen compositions.

[0089] The cosmetic sunscreen composition of the present invention may further comprise additional ingredients such as solvents, preservatives, fragrances, active compounds, or vitamins.

[0090] Non-limiting examples of solvents according to the present invention includes alcohols, water, propanediol, among others, and mixtures thereof.

[0091] Non-limiting examples of preservatives includes chlorphenesin, among others.

[0092] Non-limiting examples of active compounds according to the present invention includes hydroxyacetophenone, citric acid, among others, and mixtures thereof.

[0093] Non-limiting examples of vitamins according to the present invention includes tocopherol, among others.

[0094] The skilled in the art can select the amount of the additional ingredients so as not to adversely impact the final use of the sunscreen composition according to the present invention.

[0095] A person skilled in the art will take care to select the optional additional ingredients and / or the amount thereof such that the advantageous properties of the composition according to the invention are not, or are not substantially, adversely affected by the envisaged addition.

[0096] The additional ingredients may represent from about 0.1 % to about 70.0% by weight, based on the total weight of the composition.

[0097] EMBODIMENT OF THE INVENTION

[0098] In one embodiment, the cosmetic sunscreen composition with light sensation and improved SPF is as follows: (a) 0.01 % to 6.0% by weight of at least one polymer, selected from cetyl hydroxyethylcellulose, dehydroxanthan gum, hydroxyethylcellulose, xanthan gum, potato starch modified, hydroxypropyl starch phosphate, and mixtures thereof;

[0099] (b) 0.01 % to 10.0% by weight of at least one filler, selected from cellulose, silica, perlite, silica silylate, aluminum starch octenylsuccinate, and mixtures thereof;

[0100] (c) 0.01 % to 10.0% by weight of at least one surfactant, selected from sodium stearoyl glutamate, cetearyl alcohol and cetearyl glucoside, behenyl alcohol, polyglyceryl-10 laurate, inulin lauryl carbamate, glyceryl stearate and PEG-100 stearate, and mixtures thereof;

[0101] (d) 0.05% to 55.0% by weight of at least one fatty compound selected from isopropyl myristate, diisopropyl sebacate, dicaprylyl carbonate, dicaprylyl ether, C15-19 alkane, Copernicia cerifera (Carnauba) wax, and mixtures thereof; and

[0102] (e) 0.2% to 30.0% by weight of at least one organic UV filter, selected from butyl methoxydibenzoylmethane, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, and mixtures thereof; all weights based on the total weight of the composition.

[0103] PROCESS FOR MANUFACTURING A COSMETIC SUNSCREEN COMPOSITION

[0104] The present invention is also related to a process for manufacturing a cosmetic sunscreen composition that provides for the consumer the properties described above. The process according to the present invention comprise the steps of:

[0105] Step (a): Preparing an oily phase by mixing the UV filters, the surfactants, fatty compounds, until total homogenization;

[0106] Step (b): Preparing an aqueous phase by mixing the water and aqueous phase ingredients;

[0107] Step (c): Adding the aqueous phase of step (b) to the oily phase of step (a) under mixing until complete formation of the emulsion;

[0108] Step (d): Adding the polymers to the emulsion of step (c) under mixing until total homogenization;

[0109] Step (e): Adding the fillers to the emulsion of step (d) under mixing until total homogenization; incorporating the additional ingredients into step (e). EXAMPLES Examples 1 to 3

[0110] Non-limiting examples of the cosmetic sunscreen compositions according the present invention is as Examples 1 to 3 on table 1 below. TABLE 1

[0111] Example 5 - SPF Performance

[0112] A first in vivo test was carried out with 5 volunteers in order to determine the sun protection factor (SPF) of the cosmetic sunscreen composition according to Example 1 of the present invention, according to methodology ISO 24444. The study was conducted with 5 female subjects, aged from 18 to 65 years old, with phototypes I to III. A second in vivo test was carried out with 10 volunteers in order to determine the sun protection factor (SPF) of the cosmetic sunscreen composition according to Example 4 of the present invention, according to methodology ISO 24444.

[0113] The cosmetic sunscreen compositions according to Examples 1 and 4 of the present invention were applied on the subject's dry skin and irradiated with a controlled dose of ultraviolet radiation (product applied with small circular movements without fingercot and application time between 34 and 39 seconds). The SPF result was calculated as an arithmetical mean, with 95% confidence interval (Cl), of all individual SPF values.

[0114] The average SPF for Example 1 was 42.7.

[0115] The average SPF for Example 4 was 57.1 .

[0116] As a conclusion, the cosmetic sunscreen compositions of Examples 1 and 4 according to the present invention, show a high SPF performance.

[0117] Example 6 - Film Evaluation

[0118] Tests were performed in order to demonstrate the improvements of the film of the cosmetic sunscreen compositions of the present invention.

[0119] Example 6.1 - Microscopy Analysis

[0120] An in vitro study was conducted in order to evaluate the microscopic visual information of the dispersion of the cosmetic sunscreen composition according to Example 1 of the present invention in comparison to a comparative cosmetic sunscreen composition C1. The objective of this test is to clarify how homogeneous is the dispersion of the cosmetic sunscreen composition.

[0121] The comparative cosmetic sunscreen composition C1 is shown on table 2 below.

[0122] TABLE 2

[0123] The results of the microscopy analysis are shown in Figures 1A and 1 B. Figures 1A and 1 B demonstrate that the dispersion of the cosmetic sunscreen composition according to Example 1 has an improved homogeneity in comparison to comparative composition C1. Example 6.2 - LIV Light Analysis

[0124] An in vitro and in vivo study was conducted in order to evaluate the spreadability profile and film formation of the cosmetic sunscreen composition according to Example 1 in comparison to the comparative cosmetic sunscreen composition C1. These compositions were applied in a standardized quantity on evaluation plates and on skin.

[0125] Figures 2A and 2B shows the UV light profile of the cosmetic sunscreen composition according to Example 1 in view of the comparative sample C1 . The profile of the cosmetic composition of Example 1 is homogeneous, which demonstrates that has a more efficient spreadability and a better film formation in comparison to comparative composition C1.

[0126] Example 6.3 - Qualitative Test

[0127] A qualitative research test was conducted with 16 volunteers, aged from 18 to 30 years old. The application of the cosmetic sunscreen composition of Example 1 was performed on the face for two days, and the sensation properties of the cosmetic sunscreen composition was evaluated.

[0128] For this evaluation, the volunteers were asked to describe the feeling of the product on the skin and share experiences and reasons why they have given. As a result, the volunteers concluded that the cosmetic sunscreen composition according to Example 1 of the present invention is close to the ideal of a morning routine, with good texture, right level of radiance and skin feel. Also in the morning routine, the volunteers also concluded that the cosmetic sunscreen composition according to Example 1 of the present invention is compatible with the make-up routine, is easy to apply, has fast absorption, low stickiness and oily residue.

[0129] During the day, the volunteers verified that the cosmetic sunscreen composition according to Example 1 of the present invention is also compatible with the make-up routine, while provides excellent oil control and protection against UV radiation.

Claims

SET OF CLAIMS1. A cosmetic sunscreen composition with light sensation and improved SPF, comprising:(a) at least one polymer, selected from cetyl hydroxyethylcellulose, dehydroxanthan gum, hydroxyethylcellulose, xanthan gum, potato starch modified, hydroxypropyl starch phosphate, and mixtures thereof;(b) at least one filler, selected from cellulose, silica, perlite, silica silylate, aluminum starch octenylsuccinate, and mixtures thereof;(c) at least one surfactant, selected from sodium stearoyl glutamate, cetearyl alcohol and cetearyl glucoside, behenyl alcohol, polyglyceryl-10 laurate, inulin lauryl carbamate, glyceryl stearate and PEG-100 stearate, and mixtures thereof;(d) at least one fatty compound selected from isopropyl myristate, diisopropyl sebacate, dicaprylyl carbonate, dicaprylyl ether, C15-19 alkane, Copernicia cerifera (Carnauba) wax, and mixtures thereof; and(e) at least one organic UV filter, selected from butyl methoxydibenzoylmethane, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, and mixtures thereof.

2. Cosmetic sunscreen composition, according to claim 1 , wherein at least one polymer is present in a concentration ranging from 0.01 % to 6.0% by weight, based on the total weight of the composition.

3. Cosmetic sunscreen composition, according to claim 1 , wherein the at least one filler is present in a concentration ranging from 0.01 % to 10.0% by weight, based on the total weight of the composition.

4. Cosmetic sunscreen composition, according to claim 1 , wherein the at least one surfactant is present in a concentration ranging from 0.01 % to 10.0% by weight, based on the total weight of the composition.

5. Cosmetic sunscreen composition, according to claim 1 , wherein the at least one fatty compound is present in a concentration ranging from 0.05% to 55.0% by weight, based on the total weight of the composition.

6. Cosmetic sunscreen composition, according to claim 1 , wherein the at least one organic UV filter is present in a concentration ranging from 0.2% to 30.0% by weight, based on the total weight of the composition.

7. Cosmetic sunscreen composition, according to claim 1 , wherein the composition is free of silicones.

8. Cosmetic sunscreen composition, according to claim 1 , wherein it further comprises at least one additional ingredient selected from solvents, preservatives, fragrances, active compounds, or vitamins.

9. Cosmetic sunscreen composition with improved SPF, comprising:(a) 0.075% to 2.5% by weight of at least one polymer, selected from cetyl hydroxyethylcellulose, dehydroxanthan gum, hydroxyethylcellulose, xanthan gum, potato starch modified, hydroxypropyl starch phosphate, and mixtures thereof;(b) 0.1 % to 6.0% by weight of at least one filler, selected from cellulose, silica, perlite, silica silylate, aluminum starch octenylsuccinate, and mixtures thereof;(c) 0.075% to 5.0% by weight of at least one surfactant, selected from sodium stearoyl glutamate, cetearyl alcohol and cetearyl glucoside, behenyl alcohol, polyglyceryl-10 laurate, inulin lauryl carbamate, glyceryl stearate and PEG-100 stearate, and mixtures thereof;(d) 0.5% to 20.0% by weight of at least one fatty compound, selected from isopropyl myristate, diisopropyl sebacate, dicaprylyl carbonate, dicaprylyl ether, C15-19 alkane, Copernicia cerifera (Carnauba) wax, and mixtures thereof; and(e) 0.75% to 20.0% by weight of at least one organic UV filter, selected from butyl methoxydibenzoylmethane, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, and mixtures thereof; wherein all weights are based on the total weight of the composition.

10. Cosmetic sunscreen composition, according to any one of claims 1 or 9, wherein the composition presents a SPF ranging from 30 to 80.11 . Use of a cosmetic sunscreen composition, comprising:(a) at least one polymer, selected from cetyl hydroxyethylcellulose, dehydroxanthan gum, hydroxyethylcellulose, xanthan gum, potato starch modified, hydroxypropyl starch phosphate, and mixtures thereof;(b) at least one filler, selected from cellulose, silica, perlite, silica silylate, aluminum starch octenylsuccinate, and mixtures thereof;(c) at least one surfactant, selected from sodium stearoyl glutamate, cetearyl alcohol and cetearyl glucoside, behenyl alcohol, polyglyceryl-10 laurate, inulin lauryl carbamate, glyceryl stearate and PEG-100 stearate, and mixtures thereof;(d) at least one fatty compound, selected from isopropyl myristate, diisopropyl sebacate, dicaprylyl carbonate, dicaprylyl ether, C15-19 alkane, Copernicia cerifera (Carnauba) wax, and mixtures thereof; and(e) at least one organic UV filter, selected from butyl methoxydibenzoylmethane, ethylhexyl triazone, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, and mixtures thereof, wherein it is for the manufacture of a product to be used as a sunscreen daily product.

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