FR3142902A1 - COSMETIC sunscreen composition AND Use of a COSMETIC sunscreen composition - Google Patents

Abstract

COSMETIC sunscreen composition AND Use of a COSMETIC sunscreen composition The present invention relates to cosmetic sunscreen compositions comprising (a) emulsified carnauba wax, (b) one or more UV filters, (c) one or more polymers, (d) one or more solvents, and (e) one or more fatty compounds. The present invention also relates to the use of a cosmetic sunscreen composition. Figure for the abstract: none

Description

COSMETIC sunscreen composition AND Use of a COSMETIC sunscreen composition FIELD OF THE INVENTION

The present invention relates to cosmetic sunscreen compositions comprising (a) emulsified carnauba wax, (b) one or more UV filters, (c) one or more polymers, (d) one or more solvents, and (e) one or more fatty compounds. The present invention also relates to the use of a cosmetic sunscreen composition.

CONTEXT OF THE INVENTION

Photoprotection of keratinous materials, including skin and hair, is considered of great importance in order to protect against sun damage, sunburn, photoaging, as well as to reduce the risks of developing skin cancer caused by exposure to ultraviolet (“UV”) radiation. There are generally two types of UVA/UVB cosmetic sunscreen compositions used to accomplish photoprotection, namely inorganic UV filters and organic UV filters.

The degree of UV protection provided by a sunscreen composition is directly linked to the quantity and type of UV filters contained in it. The higher the quantity of UV filters, the higher the degree of UV protection (UVA/UVB).

In particular, sunscreen compositions must provide good protection against the sun, one measure of which is the Sun Protection Index (SPI) value, while having a satisfactory sensory perception, such as a smooth but non-greasy feel upon application. This combination of properties has typically been achieved with SPF boosters, particularly using microscopic plastic particles.

The formulation of environmentally friendly cosmetic products, which are designed and developed with environmental issues in mind, is becoming a major objective in an effort to address global challenges.

It is therefore essential to offer more sustainable compositions, preparation processes and ingredients to address these environmental concerns.

In this context, it is important to develop new cosmetic compositions with a better carbon footprint, in particular by promoting the use of materials of natural origin while reducing the use of compounds of petrochemical origin.

One of the commonly used ingredients for cosmetic sunscreen compositions is styrene/acrylates copolymer, microscopic plastic particles that act as an SPF booster. However, there is growing concern about the use of microplastics in cosmetic compositions due to their potential environmental impact. Studies indicate that microplastics can be absorbed into cells and can also contaminate other animal tissues and water.

Furthermore, water-in-oil compositions are highly sought-after dosage forms, due to the ease with which they are applied to the skin and they are commonly used in cosmetics in the field of care, particularly in cosmetic sunscreen compositions.

For these reasons, there is a need to develop new water-in-oil cosmetic sunscreen compositions that are stable, have good sensory properties and offer a high SPF without using microplastics.

The inventors of the present invention have surprisingly succeeded in developing a water-in-oil cosmetic sunscreen composition with high SPF, with a satisfactory balance between UVA and UVB protection, with good sensory attributes and stability that is free from microplastics by incorporating emulsified carnauba wax.

The present invention relates to cosmetic sunscreen compositions comprising (a) emulsified carnauba wax, (b) one or more UV filters, (c) one or more polymers, (d) one or more solvents, and (e) one or more fatty compounds. The present invention also relates to the use of a cosmetic sunscreen composition.

Other features and advantages of the present invention will become apparent from the following more detailed description of desirable embodiments which illustrate, by way of example, the principles of the invention.

DETAILED DESCRIPTION OF THE INVENTION

In one embodiment, the cosmetic sunscreen composition of the present invention comprises the following:

(a) emulsified carnauba wax;

(b) one or more UV filters;

(c) one or more polymers selected from hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer and polyamide-8, and combinations thereof;

(d) one or more solvents selected from glycerin, PEG-20, isododecane, caprylyl glycol, propanediol and combinations thereof;

(e) one or more fatty compounds selected from diisopropyl adipate, isonyl isonanoate, dicaprylyl ether, diisopropyl sebacate, dicaprylyl carbonate, polyglyceryl-6 polyricinoleate and combinations thereof.

In one embodiment, the cosmetic sunscreen composition comprises:

(a) emulsified carnauba wax;

(b) one or more UV filters;

(c) one or more polymers selected from hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, polyamide-8, poly(C _10-30 alkyl acrylate) and combinations thereof;

(d) one or more solvents selected from glycerin, PEG-20, isododecane, caprylyl glycol, propanediol and combinations thereof;

(e) one or more fatty compounds selected from diisopropyl adipate, isonyl isonanoate, dicaprylyl ether, diisopropyl sebacate, dicaprylyl carbonate, polyglyceryl-6 polyricinoleate and combinations thereof.

In one embodiment, the one or more UV filters range from 0.01 to 35.0% by weight, relative to the total weight of the composition.

In particular, the UV filter is chosen from drometrizole trisiloxane, ethylhexyl salicylate, ethylhexyl triazone, homosalate, bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate, phenylbenzimidazole sulfonic acid, titanium dioxide, terephthalylidene dicamphor sulfonic acid, octocrylene and combinations thereof.

In a preferred embodiment, the amount of emulsified carnauba wax in the cosmetic sunscreen composition of the present invention is from about 0.5% to about 20.0% by weight, preferably from about 1.0% to about 5.0% by weight, such as from about 2.0% to about 4.0% by weight, inclusive of all intermediate ranges and sub-ranges, based on the total weight of the cosmetic sunscreen composition.

In one embodiment, the polymer(s) range from about 0.01% to about 10.0% by weight, including about 0.1% to about 0.5% by weight, about 1.5% to about 3.0% by weight, about 1.75% to about 2.5% by weight, including all intermediate ranges and subranges, relative to the total weight of the cosmetic sunscreen composition.

In one embodiment, the one or more solvents range from 0.01 to 30.0% by weight, including from about 10.0% to about 20.0% by weight, from about 4.0% to about 5.0% by weight, from about 5.0 to about 15.0% by weight, including all intermediate ranges and sub-ranges, relative to the total weight of the cosmetic sunscreen composition.

In one embodiment, the one or more fatty compounds range from about 0.1% to about 40.0% by weight, including about 21.0% to 26.0% by weight, from about 5.0% to about 10.0% by weight, including all intermediate ranges and sub-ranges, based on the total weight of the cosmetic sunscreen composition.

In another embodiment, the cosmetic sunscreen composition of the present invention further comprises cosmetically acceptable ingredients selected from fragrances/perfumes, preservatives, additional solvents, active compounds, vitamins, fillers, silicones, pigments and combinations thereof. In a preferred embodiment, the cosmetic sunscreen composition of the present invention further comprises water as a solvent.

Preferably, the cosmetic sunscreen composition of the present invention is a water-in-oil composition.

In a preferred embodiment, the cosmetic sunscreen composition of the present invention may have a protection factor of from 30 to 99.

In various embodiments, the cosmetic sunscreen composition of the present invention may have an SPF of 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 90 or 99.

In one embodiment, the cosmetic sunscreen composition of the present invention may have a protection factor of 50.

In one embodiment, the cosmetic sunscreen composition of the present invention may have a protection factor of 60.

In one embodiment, the cosmetic sunscreen composition of the present invention may have a protection factor of 70.

In one embodiment, the cosmetic sunscreen composition of the present invention may have a protection factor of 80.

In one embodiment, the cosmetic sunscreen composition of the present invention may have a protection factor of 90.

In one embodiment, the cosmetic sunscreen composition of the present invention may have a protection factor of 99.

The cosmetic sunscreen composition of the present invention can be used as a daily skin product.

The cosmetic sunscreen composition of the present invention is free of styrene/acrylates copolymer.

In another embodiment, the present invention relates to the use of the cosmetic sunscreen composition for the manufacture of a product for use as a daily sunscreen product.

Terms

By the term “at least” is meant one or more and this therefore includes individual components such as mixtures/combinations.

In this document, all ranges provided are intended to include each specific range within the given ranges, as well as a combination of intermediate subranges. Thus, a range of 1 to 5 specifically includes 1, 2, 3, 4, and 5, as well as subranges such as 2-5, 3-5, 2-3, 2-4, 1-4, etc. All ranges and values disclosed herein 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 to derive a subrange, etc.

Emulsified carnauba wax

As used herein, “emulsified carnauba wax” means an emulsified and micronized carnauba wax, in a fine and homogeneous dispersion (micro-dispersion). In particular, the emulsified carnauba wax is an oil-in-water (O/W) emulsion comprising solid carnauba wax, water and at least one surfactant, marketed under the trademark Hostapur CW by Clariant.

In a preferred embodiment, the amount of solid carnauba wax in the emulsified carnauba wax is at least about 30.0% by weight, based on the total weight of the emulsified carnauba wax, preferably from about 30.0% by weight to about 50.0% by weight, based on the total weight of the emulsified carnauba wax.

Solid carnauba wax is a hard wax scraped from the leaves and leaf stems of the carnauba palm, Copernicia cerifera. Carnauba wax comprises esters of _C18 - _C32 fatty acids and _C28 - _C34 alcohols, also containing large amounts of hydroxy acid esters and melting points around 80-86 °C.

Further, the solid carnauba wax generally comprises from about 80% to about 85% by weight of fatty esters, from about 1% by weight to about 5% by weight of alcohols, from about 1% by weight to about 5% by weight of hydrocarbons, from about 1% by weight to about 5% by weight of free acids, from about 1% by weight to about 6% by weight of resins, from about 1% by weight to about 5% by weight of lactic components and from about 0.1% by weight to about 2% by weight of moisture.

In a preferred embodiment, the amount of water in the emulsified carnauba wax of the present invention is at least about 40% by weight, based on the total weight of the emulsified carnauba wax, preferably from about 40% to about 60% by weight, based on the total weight of the emulsified carnauba wax.

The at least one surfactant of the emulsified carnauba wax is selected from the group of anionic surfactants, nonionic surfactants and combinations thereof.

Non-limiting examples of anionic surfactants for the embodiment of the present invention are selected from the group consisting of 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, acyl lactylates, 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 these compounds, the alkyl and acyl groups of all these compounds comprising from 6 to 24 carbon atoms and the aryl group denoting a phenyl group. Some of these compounds can be oxyethylenated, then preferably comprise from 1 to 50 ethylene oxide units.

Non-limiting examples of nonionic surfactants for the embodiment of the present invention include, 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; sugars, for example sucrose stearate; fatty ethers of alcohols, in particular alkyl polyglucosides (APGs), such as decyl glucoside, lauryl glucoside, cetearyl glucoside, optionally as a mixture with cetearyl alcohol, and also an achyl glucoside, for example in the form of a mixture of arachidyl alcohol, behenyl alcohol and arachidyl alcohol. According to a 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.

In a preferred embodiment, the surfactants used in the emulsified carnauba wax are isotridecyl phosphate and laureth-23.

The emulsified carnauba wax of the present invention may also include additional ingredients such as preservatives and solvents. A non-limiting example of a preservative that may be used in accordance with the invention includes phenoxyethanol. A non-limiting example of a solvent that may be used in accordance with the invention includes glycerin.

UV filter

The cosmetic sunscreen composition of the present invention comprises one or more UV filters. Preferably, the one or more UV filters of the cosmetic sunscreen composition of the present invention are selected from organic UV filters, inorganic UV filters and combinations thereof.

Suitable non-limiting UV filters of the present invention could be as follows:

Organic oil soluble sunscreen ingredient

“Oil-soluble organic sunscreen ingredient” means any organic compound intended to shield UV rays that can be completely dissolved in molecular or miscible form in an oil phase or that can be dissolved in colloidal form (e.g., micellar form) in an oily fatty phase.

Non-limiting examples of oil-soluble organic sunscreen ingredients useful in the invention include, for example, cinnamic derivatives; anthranilates; salicylic derivatives; dibenzoylmethane derivatives; camphor derivatives; benzophenone derivatives; diphenylacrylate derivatives; triazine derivatives; benzotriazole derivatives; benzalmalonate derivatives, particularly those cited in US5624663; benzimidazole derivatives; imidazolines; bis-benzoazolyl derivatives as described in EP669323 and US2463264; p-aminobenzoic acid (PABA) derivatives; methylene bis(hydroxyphenylbenzotriazole) derivatives as described in applications US5237071, US5166355, GB2303549, DE19726184 and EP893119; benzoxazole derivatives as described in patent applications EP0832642, EP1027883, EP1300137 and DE10162844; screen polymers and screen silicones as described 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 EP0967200, DE19746654, DE19755649, EP-A-1008586, EP1133980 and EP1133981, merocyanine derivatives such as those described in patent applications WO 04/006878, WO 05/058269 and WO 06/032741 and mixtures thereof.

As examples of other suitable oil-soluble sunscreen ingredients, mention may be made of those listed below under their INCI name:

Cinnamic derivatives:

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

Dibenzoylmethane derivatives:

Examples of suitable dibenzoylmethane derivatives include, but are not limited to, butyl methoxydibenzoylmethane, isopropyl dibenzoylmethane.

Salicylic derivatives:

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

Beta,beta-diphenylacrylate derivatives:

Examples of suitable beta, beta-diphenylacrylate derivatives include, but are not limited to, octocrylene and etocrylene.

Benzophenone derivatives:

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, benzophenone-12, n-hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate+ or a mixture with octyl methoxycinnamate.

Benzylidenecamphor derivatives:

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

Phenylbenzotriazole derivatives:

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

Triazine derivatives:

Examples of suitable triazine derivatives include, but are not limited to, the following compounds: bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylhexyl butamido triazone, 2,4,6-tris(dineopentyl 4'-aminobenzalmalonate)-s-triazine, 2,4,6-tris(diisobutyl 4'-aminobenzalmalonate)-s-triazine, 2,4-bis(dineopentyl 4'-aminobenzalmalonate)-6-(n-butyl 4'-aminobenzoate)-s-triazine, the symmetrical triazine screen agents described in US Patent 6,225,467, WO 2004/085412 (see compounds 6 and 9) or "Symmetrical Triazine Derivatives" IP.COM Journal, IP.COM Inc., West Henrietta, NY, US (September 20, 2004), in particular 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 are included in patent applications WO/06/035, WO 06/034982, WO 06/034991, WO 06/035007, WO 2006/034992 and WO 2006/034985).

Anthranilic derivatives:

An example of a suitable anthranilic derivative includes, but is not limited to, methyl anthranilate.

Imidazoline derivatives:

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

Benzalmalonate Derivatives:

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

4,4-Diarylbutadiene derivatives:

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:

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-ethylhexyl)imino-1,3,5-triazine and combinations thereof.

Preferably, the oil-soluble organic sunscreen ingredient will be selected from butyl methoxydibenzoylmethane, ethylhexyl salicylate, ethylhexyl triazone, octocrylene, drometrizole trisiloxane, bis-ethylhexyloxyphenol methoxyphenyl triazine and combinations thereof.

The oil-soluble organic sunscreen ingredient is preferably present in the composition according to the invention in an amount of about 3 to about 25% by weight, preferably in an amount of about 5 to about 20% by weight, and preferably from about 7% to about 18% by weight, relative to the total weight of the composition.

Water soluble organic sunscreen ingredient

“Water-soluble organic sunscreen ingredient” means any organic compound intended to shield UV radiation that is completely soluble in molecular or miscible form in a liquid aqueous phase or that is soluble in colloidal form (e.g., micellar form) in a liquid aqueous phase.

Non-limiting examples of water-soluble organic sunscreen ingredients useful in the invention include, for example, terephthalylidene dicamphor sulfonic acid, phenylbenzimidazole sulfonic acid, benzophenone-4, aminobenzoic acid (PABA), 4-bis(polyethoxy)-para-aminobenzoic acid, polyethoxyethyl ester (PEG-25 PABA), benzalkonium camphor methosulfate, methylene bis-benzotriazolyl tetramethylbutylphenol (Bisoctrizole), disodium phenyl dibenzimidazole tetrasulfonate (Bisdisulizole disodium) and tris-biphenyl triazine; their derivatives and corresponding salts; naphthalene bisimide derivatives such as those described in European Patent Application EP1990372 A2; and cationic salts and quaternary derivatives of cinnamido amine such as those described in U.S. Patent 5,601,811, and combinations thereof

The salts of the compounds which can be used according to the invention are chosen in particular from alkali metal salts, for example sodium or potassium; alkaline earth metal salts, for example calcium, magnesium or strontium; metal salts, for example zinc, aluminium, manganese or copper; ammonium salts of formula NH4+; quaternary ammonium salts; organic amine salts, for example methylamine, dimethylamine, trimethylamine, triethylamine, ethylamine, 2-hydroxyethylamine, bis(2-hydroxyethyl)amine or tris(2-hydroxyethyl)amine salts; lysine or arginine salts. Salts chosen from sodium, potassium, magnesium, strontium, copper, manganese or zinc salts are preferably used. The sodium salt is preferably used.

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

The water-soluble organic sunscreen ingredient is preferably present in the composition according to the invention in an amount of about 0.1 to about 10% by weight, preferably in an amount of about 0.5 to about 8% by weight, and more preferably in an amount of about 1% to about 7% by weight, relative to the total weight of the composition.

Preferably, the one or more UV filters of the cosmetic sunscreen composition of the present invention are selected from drometrizole trisiloxane, ethylhexyl salicylate, ethylhexyl triazone, homosalate, bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate, phenylbenzimidazole sulfonic acid, titanium dioxide, terephthalidene dicamphor sulfonic acid, octocrylene, and their derivatives.

In a more preferred embodiment, the UV filter(s) of the cosmetic sunscreen composition of the present invention are selected from drometrizole trisiloxane, ethylhexyl salicylate, ethylhexyl triazone, homosalate, bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate, and combinations thereof.

In another more preferred embodiment, the UV filter(s) of the cosmetic sunscreen composition of the present invention are selected from phenylbenzimidazole sulfonic acid, butyl methoxydibenzoylmethane, ethylhexyl salicylate, titanium dioxide, ethylhexyl triazone, terephthalidene dicamphor sulfonic acid, octocrylene, homosalate, bis-ethylhexyloxyphenol methoxyphenyl triazine, and their derivatives. In another preferred embodiment, the UV filter(s) of the cosmetic sunscreen composition of the present invention are a combination of phenylbenzimidazole sulfonic acid, butyl methoxydibenzoylmethane, ethylhexyl salicylate, titanium dioxide, ethylhexyl triazone, terephthalidene dicamphor sulfonic acid, octocrylene, homosalate and bis-ethylhexyloxyphenol methoxyphenyl triazine. In another further preferred embodiment, the UV filter(s) of the cosmetic sunscreen composition of the present invention are a combination of butyl methoxydibenzoylmethane, ethylhexyl salicylate, ethylhexyl triazone, homosalate and octocrylene.

In one embodiment, the one or more UV filters of the cosmetic sunscreen composition of the present invention range from about 20.0% to about 35.0% by weight, from about 25.0% to about 30.5% by weight, from about 20.0% to about 30.0% by weight, from about 22.0% to about 26.0% by weight, including all intermediate ranges and sub-ranges, relative to the total weight of the cosmetic sunscreen composition.

Additional polymers

In addition to the hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer and/or polyamide-8 polymers, the cosmetic sunscreen composition of the present invention may further comprise one or more polymers.

Possible additional polymers may be selected from rheology modifying polymers and anionic polymers which may be water soluble or water dispersible at pH 7 and room temperature (25°C). According to the present invention, suitable polymers of the present invention could be as follows.

The rheology modifying polymers are pre-neutralized and preferably selected from taurate polymers. These polymers comprise an ionic monomer part, 2-acrylamido-2-methylpropanesulfonic acid (AMPS), as well as another less polar monomer part (vinylpyrrolidone or beheneth-25 methacrylate). These polymers are used as thickeners and stabilizers for oil-in-water emulsions and form extremely stable emulsions already at low concentrations. In particular, these polymers can be used in conjunction with almost all oil phases, including silicone oils, hydrocarbons/waxes and ester oils.

Examples of taurate polymers are acrylates/vinyl isodecanoate crosspolymer (3V's Stabylen 30), acrylates/C10-30 alkyl acrylate crosspolymer (Pemulen TR1 and TR2), carbomers (Aqua SF-1), ammonium acryloyldimethyltaurate/VP copolymer (Clariant's Aristoflex AVC), ammonium acryloyldimethyltaurate/beheneth-25 methacrylate crosspolymer (Clariant's Aristoflex HMB), acrylates/aceth-20 itaconate copolymer (National Starch's Structure 3001), polyacrylamide (SEPPIC's Sepigel 305), nonionic thickener, Rκ and Haas' Aculyn46), or combinations thereof.

Anionic polymers may be polymers with anionic groups distributed along the polymer backbone. The anionic groups, which may include carboxylate, sulfonate, sulfate, phosphate, nitrate, or other negatively charged or ionizable groups, may be arranged on side groups of the backbone or may be incorporated into the backbone itself.

The anionic polymers may comprise at least one hydrophilic unit of olefinic unsaturated carboxylic acid type and at least one hydrophobic unit exclusively of alkyl ester (C ₁₀ -C ₃₀ ) of unsaturated carboxylic acid type.

1. au moins un monomère de formule (I) :

In certain exemplary and non-limiting embodiments, the copolymers are selected from copolymers resulting from the polymerization of:

1. at least one monomer of formula (I):

CH ₂ =CH(R ₁ )COOH (I)

1. au moins un monomère d’ester alkylique (C₁₀-C₃₀) de type acide carboxylique insaturé correspondant au monomère de formule (II):

in which R ₁ is selected from H or CH ₃ or C ₂ H ₅ , providing monomers of acrylic acid, methacrylic acid or ethacrylic acid, and

1. at least one alkyl ester monomer (C ₁₀ -C ₃₀ ) of unsaturated carboxylic acid type corresponding to the monomer of formula (II):

CH ₂ =CH(R ₂ )COOR ₃ (II)

Non-limiting examples of (C ₁₀ -C ₃₀ ) alkyl esters of unsaturated carboxylic acids are for example selected from lauryl acrylate, stearyl acrylate, decyl acrylate, isodecyl acrylate, dodecyl acrylate and corresponding methacrylates, such as lauryl methacrylate, stearyl methacrylate, decyl methacrylate, isodecyl methacrylate and dodecyl methacrylate, and combinations thereof.

1. de l’acide acrylique,

1. un ester de formule (II) décrite ci-dessus, dans laquelle R2 est choisi parmi H ou CH3, R3 désignant un radical alkyle comportant de 12 à 22 atomes de carbone et
2. un agent de réticulation qui est un monomère insaturé polyéthylénique copolymérisable bien connu, tel que le phtalate de diallyle, le (méth)acrylate d'allyle, le divinylbenzène, le diméthacrylate de (poly)éthylène glycol et le méthylènebisacrylamide. Par exemple, les copolymères acrylate/acrylate d’alkyle en C₁₀-C₃₀(nom INCI Acrylates/C₁₀-₃₀Alkyl Acrylate Crosspolymer), tels que les produits commercialisés par Lubrizol sous les noms commerciaux PEMULEN TR1, PEMULEN TR2, CARBOPOL 1382 et CARBOPOL EDT 2020.

In addition, crosslinked polymers may be selected according to other exemplary embodiments. For example, these polymers may be selected from polymers resulting from the polymerization of a monomer mixture comprising:

1. acrylic acid,

1. an ester of formula (II) described above, in which R2 is chosen from H or CH3, R3 denoting an alkyl radical comprising from 12 to 22 carbon atoms and
2. a crosslinking agent which is a well-known copolymerizable polyethylene unsaturated monomer, such as diallyl phthalate, allyl (meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate and methylenebisacrylamide. For example, acrylate/C ₁₀ -C ₃₀ alkyl acrylate copolymers (INCI name Acrylates/C ₁₀ - ₃₀ Alkyl Acrylate Crosspolymer), such as the products marketed by Lubrizol under the trade names PEMULEN TR1, PEMULEN TR2, CARBOPOL 1382 and CARBOPOL EDT 2020.

Anionic polymers useful herein include, for example, the following polymers: polyacrylic acid; polymethacrylic acid; carboxyvinyl polymer; acrylate copolymers such as acrylate/C 10-30 alkyl acrylate crosspolymer, acrylic acid/vinyl ester/acrylate ninyl isodecanoate crosspolymer copolymer, acrylates/Palmerth-25 acrylate copolymer, acrylate/steareth-20 itaconate copolymer and acrylate/ceth-20 itaconate copolymer; Sulfonate polymers such as polysulfonic acid, sodium polystyrene sulfonate supplied by Akzo Nobel under the trade name FKEXAN II, copolymers of methacrylic acid and acrylamidomethylpropane sulfonic acid, and copolymers of acrylic acid and acrylamidomethylpropane sulfonic acid; carboxymethylcellulose; carboxy guar gum; copolymers of ethylene and maleic acid and silicone acrylate polymer. In some cases, anionic polymers include, for example, the following: Carbomer supplied by Noveon under the trade name CARBOPOL 981 and CARBOPOL 980; Acrylates/C10-30 Alkyl Acrylate crosspolymers under the trade names PEMULEN TR-1, PEMULEN TR-2, CARBOPOL 1342, CARBOPOL 1382 and CARBOPOL ETD 2020, all available from Noveon; sodium carboxymethylcellulose supplied by Hercules in the CMC series; and acrylate copolymer under the trade name Capigel supplied by Seppic; acrylate copolymer under the trade name CARBOPOL Aqua SF-1 and available from Lubrizol in aqueous dispersion, and acrylate crosspolymer-4 under the trade name CARBOPOL Aqua SF-2 and available from Lubrizol in aqueous dispersion.

1. l’hydroxyéthylcellulose, par exemple le produit NATROSOL 250 HHR PC ou NATROSOL 250 HHR CS commercialisé par la société Ashland ;
2. des celluloses modifiées par des groupes comprenant au moins une chaîne grasse ; des exemples pouvant être cités incluent :
   • les hydroxyéthylcelluloses modifiées par des groupes comprenant au moins une chaîne grasse, tels que les groupes alkyle, arylalkyle ou alkylaryle, ou des combinaisons de ceux-ci, et dans lesquels les groupes alkyle sont de préférence C₈-C₂₂, par exemple le produit NATROSOL Plus Grade 330 CS (alkyles en C₁₆₎commercialisé par la société Ashland, ou le produit BERMOCOLL EHM 100 commercialisé par la société AkzoNobel ; le méthyl hydroxyéthylcellulose ; le méthyl éthyl hydroxyéthylcellulose, connu sous le nom de STRUCTURE CEL 8000 M commercialisé par la société AkzoNobel ou l’hydroxypropyl cellulose, connu sous le nom de produit KLUCEL MF PHARM HYDROXYPROPYLCELLULOSOSE commercialisé par la société Ashland ;
   • les hydroxyéthylcelluloses modifiées avec des groupes d'éther alkyl d’alkylphényle polyalkylène glycol, tels que le produit Amercell Polymer HM-1500 (éther de polyéthylène glycol nonylphényl (15) éther) commercialisé par la société Amerchol ou
3. les hydroxypropylguars tels que l'hydroxypropylguar commercialisé sous le nom de produit JAGUAR HP 105 par la société Rhodia et les hydroxypropylguars modifiés par des groupements comportant au moins une chaîne grasse, tels que le produit Esaflor HM 22 (chaîne alkyle en C₂₂) commercialisé par la société Lamberti, et les produits RE210-18 (chaîne alkyle en C₁₄) et RE205-1 (chaîne alkyle en C₂₀) commercialisés par la société Rhodia.

In one embodiment, the anionic polymer of the invention is a carbomer which may be commercially available from the supplier Lubrizol under the trade name CARBOPOL 980. Examples of nonionic polymers could be as follows:

1. hydroxyethylcellulose, for example the product NATROSOL 250 HHR PC or NATROSOL 250 HHR CS marketed by the Ashland company;
2. celluloses modified by groups comprising at least one fatty chain; examples which may be cited include:
   • hydroxyethylcelluloses modified with groups comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups, or combinations thereof, and in which the alkyl groups are preferably C ₈ -C ₂₂ , for example the product NATROSOL Plus Grade 330 CS (C _{16 alkyls)} marketed by the company Ashland, or the product BERMOCOLL EHM 100 marketed by the company AkzoNobel; methyl hydroxyethylcellulose; methyl ethyl hydroxyethylcellulose, known under the name of STRUCTURE CEL 8000 M marketed by the company AkzoNobel or hydroxypropyl cellulose, known under the name of product KLUCEL MF PHARM HYDROXYPROPYLCELLULOSOSE marketed by the company Ashland;
   • hydroxyethylcelluloses modified with alkylphenyl polyalkylene glycol alkyl ether groups, such as the product Amercell Polymer HM-1500 (polyethylene glycol nonylphenyl (15) ether) marketed by the company Amerchol or
3. hydroxypropyl guars such as hydroxypropyl guar marketed under the product name JAGUAR HP 105 by the company Rhodia and hydroxypropyl guars modified by groups comprising at least one fatty chain, such as the product Esaflor HM 22 (C ₂₂ alkyl chain) marketed by the company Lamberti, and the products RE210-18 (C ₁₄ alkyl chain) and RE205-1 (C ₂₀ alkyl chain) marketed by the company Rhodia.

Surfactants

The cosmetic sunscreen of the present invention may comprise one or more suitable surfactants.

Non-limiting examples of surfactants suitable for the present invention are as follows.

Anionic surfactants useful in the invention include, for example, carboxylates (sodium 2-(2-hydroxyalkyloxy)acetate), amino acid derivatives (N-acylglutamates, N-acylglycinates or acylsarcosinates), alkyl sulfates, alkyl ethers and their oxyethylenated derivatives, sulfonates, isethionates and N-acylisethionates, alkyl taurates and N-methyltaurates, alkyl sulfosuccinates, alkyl sulfoacetates, phosphates and alkyl phosphates, anionic alkyl polyglycoside derivatives (acyl-D-galacside uronate) and combinations thereof.

Non-limiting examples of nonionic surfactants useful in the invention include, for example, oxyalkylenated (more particularly polyoxyethylenated) fatty acid esters of glycerol; inulin lauryl carbamate; oxyalkylenated fatty acid esters of sorbitan; oxyalkylenated (oxyethylenated and/or oxypropylenated) fatty acid esters; polyglyceryl-6 distearate (and) jojoba esters (and) cetyl alcohol (and) polyglyceryl-3 beeswax; oxyalkylenated (oxyethylenated and/or oxypropylenated) fatty alcohol ethers; sugar esters, for example, sucrose stearate; oxygenated alcohol ethers of sugars, in particular alkyl polyglucoxides (APG) such as decylside and laurylside, cetearylside optionally in admixture with cetearyl alcohol, and also arachidyl glucoside, for example in the form of a mixture of arachidyl alcohol, behenyl alcohol and arachidyl glucoside. According to a 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.

Non-limiting examples of fatty acids selected from higher C ₁₂ - C ₂₂ fatty acids, such as myristic acid, oleic acid, linoleic acid, linolenic acid, lauric acid, palmitic acid and combinations thereof.

Non-limiting examples of cationic surfactants are those that may be positively charged. This surfactant may carry one or more positive permanent charges or may contain one or more functional groups that are cationizable in the composition according to the disclosure. The cationic surfactant(s) may also be selected from optionally polyoxyalkylenated primary, secondary or tertiary fatty amines, or salts thereof, and quaternary ammonium salts, and combinations thereof. The fatty amines generally comprise at least one C ₈ -C ₃₀ hydrocarbon chain.

Preferred surfactants may be selected from isotridecyl phosphate, laureth-23, octyldodecanol, octyldodecyl xyloside, PEG-30, dipolyhydroxystearate, PEG-8 laurate, sodium dodecylbenzenesulfonate and combinations thereof.

Additional Ingredients

In addition to the essential components described above, the composition of the invention may further comprise any usual cosmetically acceptable ingredient, which may be chosen in particular from agents such as perfumes/fragrances, preservatives, additional solvents, active ingredients, additional fatty compounds, vitamins, fillers, silicones, pigments and combinations thereof.

The person skilled in the art will take care to select the optional additional ingredients and/or their quantity so that the advantageous properties of the composition according to the invention are not, or not significantly, compromised by the envisaged addition.

A non-limiting example of a preservative that may be used in accordance with the invention includes phenoxyethanol.

Suitable fillers of the invention could be such as the examples of oil absorbing fillers: mica, silica, zea may (corn) starch, magnesium oxide, nylon-12, nylon-66, cellulose, polyethylene, talc, talc (and) methicone, talc (and) dimethicone, perlite, sodium silicate, pumice, PTFE, polymethyl methacrylate, oryza sativa (rice) starch, aluminum starch octenylsuccinate, modified potato starch, alumina, silica silylate, calcium sodium borosilicate, magnesium carbonate, hydrated silica, dimethicone/vinyl dimethicone crosspolymer, sodium carboxymethyl starch.

The cosmetic sunscreen composition of the present invention may further comprise water as a solvent, present in a concentration of about 30.0% to about 70.0% by weight, or about 35.0% to about 75.0% by weight, or preferably about 40.0% to about 70.0% by weight, and more preferably about 45.0% to about 65.0% by weight, including intermediate ranges and sub-ranges, based on the total weight of the combinations and/or compositions of the present disclosure.

Suitable additional active ingredients include, but are not limited to, disodium EDTA, triethanolamine and combinations thereof.

Examples of fats include, but are not limited to, esters, fatty acids, synthetic oils and hydrocarbons/paraffins, such as stearyl alcohol, myristic acid, palmitic acid, silicone mineral oils, vegetable oils and combinations thereof.

Non-limiting example of vitamins suitable for the composition of the present invention includes tocopherol.

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

The additional ingredients may represent from about 60.0% to about 85.0% by weight, especially from about 60.0% to about 82.0% by weight, or from about 65.0% to about 80.0% by weight, relative to the total weight of the composition of the invention.

METHODS OF IMPLEMENTATION

Non-limiting embodiments of the cosmetic sunscreen composition of the present invention may be as follows.

In a first embodiment, the cosmetic sunscreen composition may comprise:

(a) from about 1.0 to about 5.0% by weight, based on the total weight of the composition, of emulsified carnauba wax;

(b) from about 25.0% to about 30.5% by weight, based on the total weight of the composition, of bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethylamino hydroxybenzoyl hexyl benzoate, drometrizole trisiloxane, ethylhexyl salicylate, ethylhexyl triazone, homosalate and combinations thereof;

(c) from about 0.1% to about 0.5% by weight, based on the total weight of the composition, of poly(C _10-30 alkyl acrylate);

(d) from about 4.0% to about 5.0% by weight, based on the total weight of the composition, of caprylyl glycol, glycerin, PEG-20, propanediol and combinations thereof;

(e) from about 21.0% to about 26.0% by weight, based on the total weight of the composition, of dicaprylyl carbonate, dicaprylyl ether, diisopropyl sebacate, polyglyceryl-6 polyricinoleate, and combinations thereof.

In another embodiment, the cosmetic sunscreen composition may comprise:

(a) from about 1.0 to about 5.0% by weight, based on the total weight of the composition, of emulsified carnauba wax;

(b) from about 20.0% to about 30.0% by weight, based on the total weight of the composition, of bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, ethylhexyl salicylate, ethylhexyl triazone, homosalate, octocrylene, phenylbenzimidazole sulfonic acid, terephthalylidene dicamphor sulfonic acid, titanium and combinations thereof;

(c) from about 1.5% to about 3.0% by weight, based on the total weight of the composition, of hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, polyamide-8, and a combination thereof;

(d) from about 10.0% to about 20.0% by weight, based on the total weight of the composition, of caprylyl glycol, glycerin, isododecane and combinations thereof;

(e) from about 5.0% to about 10.0% by weight, based on the total weight of the composition, of diisopropyl adipate, isononyl isononanoate, stearic acid and combinations thereof.

PROCESS FOR MANUFACTURING SUNSCREEN COMPOSITION

An illustrative and non-limiting method of manufacturing the cosmetic sunscreen composition according to the present invention may comprise the following steps:

a) heating the oily phase containing fatty compounds, emollients and oily UV filters up to 75°C;

a1) when present in the cosmetic composition, addition and heating of the polymers in a);

b) heating the aqueous phase containing up to 70°C;

b1) when present in the composition, addition and heating of the polymers in step b);

c) adding step (b) to step (a) homogenizing the mixture;

d) addition of fillers, antioxidants, perfume and other possible solvents below 45°C homogenizing the mixture.

EXAMPLES

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

Examples 1 to 4

A suitable composition according to the prior art is in the form of Examples 1 to 3 and suitable cosmetic sunscreen compositions according to the present invention are in the form of Examples 2 to 4, as follows:

Function Ingredient Ex. 1 Ex. 2 Ex. 3 Ex. 4 Active compound citric acid 0.01 - 1 0.01 - 1 0.01 - 1 0.01 - 1 Active compound p-anisic acid 0.01 - 1 0.01 - 1 0.01 - 1 0.01 - 1 Active compound sodium chloride 0.01-3 0.01-3 0.01-3 0.01-3 Active compound trisodium ethylenediamine disuccinate 0.1-2 0.1-2 0.1-2 0.1-2 Fat compound Dicaprylyl carbonate 0.5-40 0.5-40 0.5-40 0.5-40 Fat compound dicaprylic ether 0.5-40 0.5-40 0.5-40 0.5-40 Fat compound diisopropyl sebacate 0.5-40 0.5-40 0.5-40 0.5-40 Fat compound Polyglyceryl-6 polyricinoleate 0.1 - 10 0.1 - 10 0.1 - 10 0.1 - 10 Polymer C _10-30 alkyl poly acrylate 0.01- 10 0.01- 10 0.01- 10 0.01- 10 Conservative phenoxyethanol 0.01 - 1 0.01 - 1 Silicon dimethicone 0.1-20 0.1-20 0.1-20 0.1-20 Solvent caprylyl glycol 0.1-1 0.1-1 0.1-1 0.1-1 Solvent glycerin 0.01- 30 0.01- 30 Solvent PEG-20 0.01-10 0.01-10 0.01-10 0.01-10 Solvent propanediol 0.1-20 0.1-20 0.1-20 0.1-20 Solvent water Q.S. Q.S. Q.S. Q.S. Surfactant isotridecyl phosphate - 0.1 - 1 0.1 - 1 Surfactant laureth-23 - 0.05-3 0.05-3 Surfactant PEG-8 Laurate - 0.01-1 Surfactant sodium dodecylbenzenesulfonate - 0.01-1 UV Booster Copernicia cerifera (Carnauba) wax - 0.5-10 0.5-10 UV Booster styrene/acrylates copolymer - 0.5-10 UV filter bis-ethylhexyloxyphenol methoxyphenyl triazine 0.1 - 10 0.1 - 10 0.1 - 10 0.1 - 10 UV filter butyl methoxydibenzoylmethane 0.1-5 0.1-5 0.1-5 0.1-5 UV filter diethylamino hydroxybenzoyl hexyl benzoate 0.1-10 0.1-10 0.1-10 0.1-10 UV filter drometrizole trisiloxane 0.1-15 0.1-15 0.1-15 0.1-15 UV filter ethylhexyl salicylate 0.1-5 0.1-5 0.1-5 0.1-5 UV filter ethylhexyl triazone 0.1-5 0.1-5 0.1-5 0.1-5 UV filter homosalate 0.1-15 0.1-15 0.1-15 0.1-15 Vitamin tocopherol 0.05 - 2 0.05 - 2 0.05 - 2 0.05 - 2

Compositions of the state of the art and of the present invention

Examples 5 to 8

Suitable compositions according to the state of the art are such as Examples 5 and 6, and suitable compositions according to the present invention are such as Examples 7 to 8, as follows:

Function Ingredient Ex. 5 Ex. 6 Ex. 7 Ex. 8 Active compound Disodium EDTA 0.01- 1 - - - Active compound triethanolamine 0.01-2.5 0.01-2.5 - 0.01-2.5 Active compound trisodium ethylenediamine disuccinate - 0.1- 2 0.1- 2 0.1- 2 Antioxidant pentaerythrityl tetra-di-t-butyl hydroxyhydrocinnamate 0.01-5 0.01-5 0.01-5 0.01-5 Emulsifier polysorbate 60 0.05- 8 0.05- 8 0.05- 8 0.05- 8 Emulsifier sorbitan isostearate 0.05-6 0.05-6 0.05-6 0.05-6 Fat compound diisopropyl adipate - 0.5-20 - 0.5-20 Fat compound isononyl isononanoate 0.5-40 0.5-40 0.5-40 0.5-40 Fat compound stearic acid - 0.1-10 - 0.1-10 Charge aluminum hydroxide - 0.01-2 - 0.01-2 Charge kaolin 0.01-10 - - - Charge silica 0.1-10 0.1-10 0.1-10 0.1-10 Charge silica silylate 0.01- 5 0.01- 5 0.01- 5 0.01- 5 Fragrance scent 0.01-2 - - - Polymer Hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer 0.1-10 0.1-10 0.1-10 0.1-10 Polymer polyamide-8 0.1-10 0.1-10 0.1-10 0.1-10 Conservative phenoxyethanol 0.01-1 0.01-1 0.01-1 0.01-1 Solvent caprylyl glycol 0.01 - 2 0.01 - 2 0.01 - 2 0.01 - 2 Solvent glycerin 1-30 1-30 1-30 1-30 Solvent isododecane 1-30 1-30 1-30 1-30 Solvent water Q.S. Q.S. Q.S. Q.S. Surfactant isotridecyl phosphate - - 0.1-1 0.1-1 Surfactant laureth-23 - - 0.05-3 0.05-3 Surfactant octyldodecanol 0.1-10 0.1-10 0.1-10 0.1-10 Surfactant Octyldodecyl xyloside 0.1-10 0.1-10 0.1-10 0.1-10 Surfactant PEG-30 dipolyhydroxystearate 0.1-10 0.1-10 0.1-10 0.1-10 UV Booster Copernicia wax (carnauba) 0.1-20 0.1-20 0.1-20 0.1-20 UV filter bis-ethylhexyloxyphenol methoxyphenyl triazine - 0.1-10 - 0.1-10 UV filter butyl methoxydibenzoylmethane 0.1-5 0.1-5 0.1-5 0.1-5 UV filter ethylhexyl salicylate 0.1-5 0.1-5 0.1-5 0.1-5 UV filter ethylhexyl triazone - 0.1-5 - 0.1-5 UV filter homosalate 0.1-15 0.1-15 0.1-15 0.1-15 UV filter octocrylene 0.1-10 - 0.1-10 - UV filter phenylbenzimidazole sulfonic acid - 0.1-8 - 0.1-8 UV filter terephthalylidene dicamphor sulfonic acid - 0.1-10 - 0.1-10 UV filter titanium dioxide - 0.5-25 - 0.5-25 Vitamin tocopherol - 0.05-2 - 0.05-2

Compositions of the state of the art and of the present invention

TESTS Test 1 – In Vivo

A composition according to the state of the art, comprising a styrene/acrylates copolymer, was compared with inventive compositions according to Ex. 2 to 4.

The prior art composition according to Ex. 2 demonstrated a PI of 29.8, while the inventive compositions of the present invention demonstrated a PI of 52.6 (inventive composition of Ex. 2), 48.6 (inventive composition of Ex. 3) and 39.4 (inventive composition of Ex. 4). The inventive compositions demonstrated a PI boosting effect, compared to Ex. 1, of 22.8 (inventive composition of Ex. 2), 18.8 (inventive composition of Ex. 3) and 9.6 (inventive composition of Ex. 4).

Test 2 – In Vitro

The prior art composition of Ex. 5 was compared with the inventive composition of Ex. 7. The composition of Ex. 5 demonstrated an in vitro IP of 20.3, while the inventive composition of Ex. 7 exhibited an IP of 73.3.

The prior art composition of Ex. 6 was compared with the inventive composition of Ex. 8. The composition of Ex. 6 demonstrated an in vitro IP of 51, while the inventive composition of Ex. 8 exhibited an IP of 97.3.

Claims (10)

A cosmetic sunscreen composition comprising:
(a) emulsified carnauba wax;
(b) one or more UV filters;
(c) one or more polymers selected from hydroxyethyl acrylate/sodium acryloyldimethyl taurate copolymer, polyamide-8, poly(C _10-30 alkyl acrylate) and combinations thereof;
(d) one or more solvents selected from glycerin, PEG-20, isododecane, caprylyl glycol, propanediol and combinations thereof;
(e) one or more fatty compounds selected from diisopropyl adipate, isonyl isonanoate, dicaprylyl ether, diisopropyl sebacate, dicaprylyl carbonate, polyglyceryl-6 polyricinoleate and combinations thereof. A cosmetic sunscreen composition according to claim 1, wherein the emulsified carnauba wax is from 0.5 to 20.0%, by weight, relative to the total weight of the composition. A cosmetic sunscreen composition according to claim 1, wherein the one or more UV filters are selected from organic UV filters, inorganic UV filters and combinations thereof. Cosmetic sunscreen composition according to claim 3, wherein the UV filter is selected from drometrizole trisiloxane, ethylhexyl salicylate, ethylhexyl triazone, homosalate, bis-ethylhexyloxyphenol methoxyphenyl triazine, butyl methoxydibenzoylmethane, diethylaminohydroxybenzoyl hexyl benzoate, phenylbenzimidazole sulfonic acid, titanium dioxide, terephthalylidene dicamphor sulfonic acid, octocrylene and combinations thereof. A cosmetic sunscreen composition according to claim 1, wherein the one or more UV filters range from 0.01 to 35.0% by weight, relative to the total weight of the composition. A cosmetic sunscreen composition according to claim 1, wherein the one or more polymers range from 0.01 to 10.0% by weight, based on the total weight of the composition. A cosmetic sunscreen composition according to claim 1, wherein the one or more solvents range from 0.01 to 30.0% by weight, based on the total weight of the composition. A cosmetic sunscreen composition according to claim 1, wherein the one or more fatty compounds range from 0.1 to 40.0% by weight, relative to the total weight of the composition. A cosmetic sunscreen composition according to claim 1, further comprising cosmetically acceptable ingredients selected from perfumes/fragrances, preservatives, additional solvents, active compounds, vitamins, fillers, silicones, pigments and combinations thereof. Cosmetic sunscreen composition according to claim 1, being a water-in-oil composition.