FR2750602A1 - Composition for protecting skin and/or hair against UV radiation - Google Patents

Abstract

Cosmetic and/or dermatological composition comprises, in a support, a photo-protective system capable of filtering UV rays (UVA and/or UVB) and a thickener system comprising a mixed alkali-alkaline earth fluorosilicate having swelling and emulsifying properties.

Description

COMPOSITIONS COMPRISING A PHOTOPROTECTIVE AGENT AND A
MIXED FLUOROSILICATE OF ALKALINE AND ALKALINE EARTH AND
USES
The present invention relates to novel cosmetic and / or dermatological compositions intended for protecting the skin and / or the hair against UV radiation, in particular solar radiation (hereinafter referred to as antisolar compositions). More specifically, it relates to novel cosmetic and / or dermatological compositions having an improved sun protection factor and comprising, in a cosmetically and / or dermatologically acceptable support, a photoprotective system and a particular thickening system.

The present invention also relates to a cosmetic treatment method using a composition as defined above.

It is known that light radiation of wavelengths between 280 nm and 400 nm allows the browning of the human epidermis and that the wavelength rays between 280 nm and 320 nm, known under the name of UV -B, cause erythema and skin burns that can affect the development of natural tanning; this UV-B radiation must therefore be filtered.

It is also known that UV-A rays of wavelengths between 320 nm and 400 nm, which cause browning of the skin, are capable of inducing an alteration thereof, particularly in the case of sensitive skin or skin continuously exposed to solar radiation. UV rays
In particular, they cause a loss of elasticity of the skin and the appearance of wrinkles leading to premature aging. They promote the triggering of the erythematous reaction or amplify this reaction in some subjects and may even be the cause of phototoxic or photoallergic reactions. It is therefore desirable to also filter the UV-A radiation.

Numerous cosmetic compositions intended for the photoprotection (UV-A and / or UV-B) of the skin have been proposed to date.

These antisolar compositions are quite often in the form of an oil-in-water emulsion (that is to say a cosmetically acceptable support consisting of an aqueous dispersant continuous phase and an oily disperse discontinuous phase) which contains at various concentrations, one or more conventional organic filters, lipophilic and / or hydrophilic, capable of selectively absorbing harmful UV radiation, these filters (and their amounts) being selected according to the desired sun protection factor (the sunscreen expressed mathematically by the ratio of the irradiation time required to reach the erythematogenic threshold with the UV filter at the time necessary to reach the erythematous threshold without UV filter). Furthermore, the use of (nano) inorganic pigments ("nanopigments") means pigments whose mean size of the primary particles generally does not exceed 100 nm, this size preferably being between 5 nm and 100 nm, and more preferably still between 10 and 50 nm) based on metal oxides, and in particular on titanium oxide, in the field of solar protection, is also common today, and it is known in particular that these substances, whether or not they are combined with conventional organic absorbers UV-A and / or UV-B absorbers, are capable of providing the sunscreen compositions which contain them with a certain photoprotective power which is clean or complementary, albeit rather limited, and this by acting by simple physical blocking of UV rays (reflection mechanisms and / or radiation scattering).

In order to improve the essentially cosmetic properties of the sunscreen compositions, and more particularly of those described above, it is now also customary to introduce in the latter thickening polymers with emulsifying properties and among which we can particularly mention crosslinked copolymers of Acrylic Acid / C10-C30 alkyl acrylate type, such as those known under the trade names "PEMULEN TR-1" and "CARBOPOL 1342" from Goodrich, whose use is actually today most widespread.

However, one of the problems with most of the sunscreen cosmetic compositions that contain such polymers, whether based on organic filters or nanopigments or even a mixture thereof, is that the skin protection attached to them may, and in particular for so-called highly sensitive skins and / or continuously exposed to the sun, appear as still insufficient, and it would therefore be useful, in this respect, to be able to further improve the photoprotective properties of these skins. compositions of the prior art, while of course preserving the good cosmetic properties.

The present invention aims to satisfy such a need.

However, following important research in the field of photoprotection mentioned above, the Applicant has now discovered, unexpectedly and surprisingly, that it is possible to obtain sunscreen compositions having both good improved cosmetic properties and protection indices by associating a particular thickening system with a conventional photoprotective system.

This discovery is at the origin of the invention.

Thus, the present invention relates to novel cosmetic and / or dermatological compositions comprising, in a cosmetically and / or dermatologically acceptable support, a photoprotective system capable of filtering UV rays (UV-A and / or UV-B) and a system thickener, characterized in that said thickening system comprises a mixed fluorosilicate of alkali and alkaline earth, in particular sodium and magnesium, with swelling and emulsifying properties.

According to the invention, the term "photoprotective system" capable of filtering UV radiation is generally intended to denote any compound or combination of compounds which, by mechanisms known per se of absorption and / or reflection and / or diffusion of the radiation. UV-A and / or UV-B, makes it possible to prevent, or at least limit, bringing said radiation into contact with a surface (skin, hair,) on which this or these compounds have been applied. In other words, the compounds targeted by the present invention are both the UV-absorbing photoprotective organic filters and the (nano) mineral pigment diffusers and / or UV reflectors, as well as their mixtures.

The compositions according to the invention have the advantage of having a high sun protection factor and this, whatever their support. In particular, by virtue of the invention, it is possible to obtain sunscreen compositions in the form of gels, cream-gels or oil-in-water or water-in-oil emulsions which have a high sun protection factor and which have remarkable cosmetic properties: the compositions are pleasant to the touch, they do not stick, are not fat and spread easily.

The compositions according to the invention also have the advantage of having good water retention, that is to say that the filtering system which they contain is difficult to remove in contact with water when showering or bathing, and as a result, the compositions are effective longer.

Still another object of the present invention is a cosmetic treatment method for the protection of the skin and / or the hair against ultraviolet radiation, in particular solar radiation, and which essentially consists in applying to them an effective amount of a composition according to the invention.

Other features, aspects and advantages of the present invention will appear on reading the detailed description which follows.

The compositions according to the invention comprise a thickening system which comprises a mixed fluorosilicate of alkali and alkaline earth with swelling and emulsifying properties.

Preferably, said mixed fluorosilicate is a mixed fluorosilicate of sodium and magnesium.

A particularly preferred sodium and magnesium fluorosilicate according to the invention is a compound in the form of a white mineral powder sold under the trade name Submica E by the company
Wackherr and answering the following formula
(Na2O) x (go), (SiO2) z Mg F2 in which
0.1 <x <0.5
1, 5 <y <2 3.5 I z 5 <z <4.

In the compositions according to the invention, the mixed fluorosilicate of alkali and alkaline earth metals, in particular the mixed sodium and magnesium fluorosilicate, can be present in a content ranging from 0.1 to 20% by weight, preferably from 0.5 to 10%, relative to the total weight of the composition.

In a preferred embodiment of the invention, the thickening system may comprise, in addition to the mixed alkali and alkaline earth fluorosilicate according to the invention, another thickening agent with emulsifying properties such as the crosslinked copolymer of the type acrylic acid / alkyl acrylate ClO-
C30 sold under the trade name Pemulen TR-1 by the company Good Rich.

Other thickeners that can also be used in the formulation of the compositions according to the invention include crosslinked polyacrylic acids, guar gums and modified or unmodified celluloses such as hydroxypropyl guar gum, methylhydroxyethylcellulose, hydroxypropylmethylcellulose or else hydroxyethylcellulose, modified clays (bentones), metal salts of fatty acids (aluminum stearate), ethylene / acrylate copolymers, silicas, polyethylenes, calcium silicates or ethylcellulose.

In another embodiment of the invention, the compositions may comprise an emulsifier system distinct from the thickening system, said emulsifying system comprising one or more conventional emulsifiers; a fine emulsion is thus obtained which is particularly suitable for the manufacture of cosmetic and / or dermatological compositions in the form of oil-in-water emulsions.

As conventional emulsifiers, it is possible to use fatty acid esters of polyethylene glycol (PEG), esters of fatty acids and of glycerol (glyceryl stearate) or esters of fatty acids and of sugar (sorbitan stearate). as well as their polyoxyethylenated or polyoxypropylenated derivatives, sugar ethers, cyclomethicones and dimethicone copolyols, anionic surfactants (K or Na alkylphosphate), polyalkoxylated fatty alcohols.

In a preferred embodiment of the invention, the mixed fluorosilicate of alkali and alkaline earth metal, in particular sodium and magnesium, according to the invention is used as the only thickening and emulsifying system, that is to say say without conventional emulsifier then a gel-cream is obtained, that is to say a dispersion of oil droplets in an aqueous phase obtained without addition of emulsifier.

As indicated above, the thickening system of the compositions according to the invention can be associated with one or more organic UV absorber filters, or with one or more inorganic nanopigments, or with mixtures thereof (photoprotective system).

The organic filters that can be used in the antisolar compositions in accordance with the invention are conventional UV-A and / or UV-B-active UV filters, hydrophilic or lipophilic. By way of examples, these filters may be chosen, alone or as a mixture, from 2-phenyl benzimidazole 5-sulphonic acid and its salts, cinnamic derivatives, salicylic derivatives, benzylidene camphor derivatives and triazine derivatives. , benzophenone derivatives, dibenzoylmethane derivatives, ss, ss-diphenylacrylate derivatives, paminobenzoic acid derivatives, menthylanthranilate, filter and silicone screening polymers described in application WO-93-04665. . Other examples of organic filters are given in patent application EP-A 0 487 404.

The organic filter or filters are generally present in the compositions according to the invention at a content ranging from 0.1% to 30%, preferably from 0.5 to 15% by weight, relative to the total weight of the composition.

A second category of photoprotective agents that are particularly suitable for the compositions according to the invention is that of the pigments. Preferably, use is made of nanopigments (average size of the primary particles generally between 5 nm and 100 nm, preferably between 10 and 50 nm) coated or uncoated metal oxide minerals such as, for example, titanium oxide nanopigments ( amorphous or crystallized in rutile and / or anatase form), iron, zinc, zirconium or cerium which are all well known photoprotective agents per se acting by physical blocking (reflection and / or diffusion) of UV radiation. Conventional coating agents are also alumina and / or aluminum stearate or silicones. Such nanopigments of metal oxides, coated or uncoated, are in particular described in patent applications EP-A-0 518 772 and EP-A-0 518 773.

The inorganic (nano) pigment (s) may be present in the compositions according to the invention at a content of between 0.1% and 30%, preferably from 0.5% to 10%, by weight, relative to the total weight of the composition.

The other constituents that can be included in the formulation of the compositions targeted by the invention, in particular oils, waxy compounds, cosmetic and / or dermatological active agents are those conventionally used in the cosmetic and / or dermatological field.

By oil is meant a liquid compound at room temperature. By wax is meant a solid or substantially solid compound at room temperature, and whose melting point is generally greater than 35 ° C.

As oils, mention may be made of mineral oils (petroleum jelly); vegetable (sweet almond oil, macadamia oil, blackcurrant seed oil, jojoba oil); synthetic compounds such as perhydrosqualene, alcohols, fatty acids or esters (octyl palmitate, isopropyl lanolate, triglycerides including those of capric / caprylic acids), oxyethylenated or oxypropylene fatty esters and ethers; silicone (cyclomethicone, polydimethylsiloxane or PDMS) or fluorinated, polyalkylenes.

Waxy compounds that may be mentioned include paraffin wax, carnauba wax, beeswax and hydrogenated castor oil.

The compositions according to the invention may also contain anti-free radical agents, antioxidants, vitamins such as vitamins E and C for example, alpha hydroxy acids.

The compositions according to the invention may also contain agents for tanning and / or artificial browning of the skin (self-tanning agents), such as, for example, dihydroxyacetone (DHA).

The compositions targeted by the present invention may also contain various ingredients conventionally used in the cosmetic, dermatological or dermopharmaceutical field, such as dyestuffs, solvents (water, alcohols, etc.), preservatives, perfumes, moisturizing active ingredients, pulverulent agents, bactericidal agents and / or odor absorbers.

Of course, those skilled in the art will take care to choose the optional additional compound (s) mentioned above and / or their amounts in such a way that the advantageous properties intrinsically attached to the combination [photoprotective system + mixed fluorosilicate of alkaline and alkaline earth] according to the invention are not, or not substantially, altered by the addition or additions envisaged.

The compositions concerned by the invention may be prepared according to the techniques well known to those skilled in the art, in particular those intended for the preparation of aqueous continuous phase dispersions such as oil-in-water type emulsions, gels and cream gels.

This composition may be in particular in the form of an emulsion, simple or complex (O / W, W / O, O / W / H or W / O / W) such as a cream, a milk, or in the form a gel or a cream gel, powder, solid stick and optionally be packaged in aerosol and be in the form of foam or spray.

As an indication, for the antisolar formulations in accordance with the invention which have an aqueous continuous phase dispersion-type support, such as oil-in-water emulsions and cream-gels, the aqueous phase (including in particular the hydrophilic filters) represents generally from 50 to 95% by weight, preferably from 70 to 90% by weight, relative to the overall formulation, the oily phase (including in particular the lipophilic filters) from 5 to 50% by weight, preferably from 10 to 30% by weight, based on the overall formulation, relative to the overall formulation.

Preferably, the compositions in accordance with the invention are in the form of cream gels.

Concrete but non-limiting examples illustrating the invention will now be given.

In all the examples that follow, the amounts are expressed as% by weight relative to the total weight of the composition.

Examples 1 and 2 which follow are intended to show that a cream-gel according to the invention, that is to say comprising a photoprotective system (an octyl methoxycinnamate for example 1 and a nanopigment of titanium oxide for Example 2) in combination with a mixed fluorosilicate of alkali and alkaline earth according to the invention has a photoprotective power significantly higher than a gel-cream comprising the same photoprotective system but in combination with another thickening agent to emulsifying properties, such as the acrylic acid / C10-C30 alkyl acrylate copolymer sold under the trade name Pemulen TR1 by the company Goodrich and used conventionally to produce gelcremes.

EXAMPLE 1
A composition A according to the invention was prepared in the form of a gel-cream of the following composition - benzoate of C12-C15 alcohols sold under the trade name Finsolv TN by the company Finetex 10% - octylmethoxycinnamate sold under the trade name Parsol MCX by Givaudan 8% - sodium and magnesium fluorosilicate sold under the trade name Submica E by the company Wackherr 8% - preservative qs - neutralizing agent qs pH = 7 to 8 - demineralized water qs 100 %
A comparative gel-cream B was then prepared, with the same support as gelcrème A, but representative of a conventional gel-cream made with an emulsifying polymer customary for this kind of composition. In gel-cream B, the sodium and magnesium fluorosilicate has thus been replaced by Pemulen
TR-1 in a proportion which makes it possible to obtain similar viscosities for cream-gels A and B. Gel-cream B has the following composition: C 12 -C 15 alcohols benzoate sold under the trade name Finsolv TN by the Finetex 10% - octylmethoxycinnamate sold under the trade name Parsol MCX by Givaudan 8% - acrylic acid / C10-C30 alkyl acrylate copolymer sold under the trade name
Pemulen TR-1 by Goodrich company 1% - preservative qs - neutralizing agent qs pH = 7 to 8 - demineralised water qs 100%
For each of the gel-creams A and B, the sun protection factor (SPF) attached thereto was then determined. This was determined using the in vitro method described by BL DIFFEY et al. in J. Soc. Cosmet. Chem. 40127-133 (1989); this method consists in determining the monochromatic protection factors every 5 nm in a wavelength range of 290 to 400 nm and in calculating therefrom the sun protection factor according to a given mathematical equation.

The results (mean value corresponding to three trials) are grouped in Table (I) below.
Table (I):

<tb> Cream Gel <SEP> | <SEP> A <SEP><SEP> (Invention) <SEP> | <SEP> B <SEP> (comparative)
<tb><SEP> SPF <SEP> Medium <SEP> 1 <SEP> 7.1 <SEP> 1 <SEP> 3.9
<Tb>
These results clearly show that for an identical photoprotective system (octylmethoxycinnamate), the cream-gel A according to the invention has a photoprotective power significantly greater than that obtained with a gel-cream made with a conventional emulsifying polymer and containing no fluorosilicate. sodium and magnesium.

The improvement of the photoprotective power is not due to the mineral nature of the fluorosilicate since a standard composition, identical to the gel-cream A but free of Parsol MCX, has an SPF of the order of 1.

EXAMPLE 2
Composition C according to the invention was prepared in the form of a gel-cream of the following formulation - benzoate of C12-C15 alcohols sold under the trade name Finsolv TN by the company Finetex 20% - nanopigment of titanium oxide sold under the trade name MT 100 T by Tayca 10% - sodium magnesium fluorosilicate sold under the trade name Submica E by the company Wackherr 8% - preservative qs - neutralizing agent qs pH = 7 to 8 - demineralised water qs 100%
A comparative gel-cream D was then prepared, with the same support as gelcrème C but representative of a conventional gel-cream made with the same usual emulsifying polymer such as that used in Example 1. In gel cream D, as for gel-cream B of Example 1, the sodium and magnesium fluorosilicate was replaced by Pemulen TR-1 from Goodrich in a proportion which makes it possible to obtain viscosities similar for cream gels C and
D. Gel-cream D has the following composition: - C12-C15 alcohols benzoate sold under the trade name Finsolv TN by the company Finetex 20% - titanium oxide nanopigment sold under the trade name MT 100 T by Tayca 10% - acrylic acid / C10-C30 alkyl acrylate copolymer sold under the trade name
Pemulen TR-1 by Goodrich company 0.5% - preservative qs - neutralizing agent qs pH = 7 to 8 - demineralised water qs 100%
For each of cream gels C and D, the SPF was determined according to the same protocol as in Example 1.

The results (mean value corresponding to three trials) are grouped in Table (II) below.
Table (II):

<tb> Gel-cream <SEP> C <SEP> (invention) <SEP> D <SEP> D <SEP> (comparative)
<tb><SEP> SPF <SEP> Medium <SEP> | <SEP> 19.3 <SEP> | <SEP> 4.1
<Tb>
These results clearly show that for an identical photoprotective system (titanium oxide nanopigment), the gel-cream C according to the invention has a photoprotective power significantly higher than that obtained with a gelcrème made with a conventional emulsifying polymer and not containing of sodium fluorosilicate and magnesium.

EXAMPLE 3
This example is intended to show that an oil-in-water emulsion according to the invention, namely comprising a photoprotective system in combination with a mixed fluorosilicate of alkali and alkaline earth according to the invention, has a protection factor. solar significantly higher than an emulsion comprising the same photoprotective system but in combination with a conventional thickening system not containing this fluorosilicate.

An antisolar emulsion E according to the invention was prepared in the form of an oil-in-water type emulsion and of the following composition: stearic acid 2.5% cetyl alcohol 0.5% benzoate C12-C15 alcohols sold under the trade name Finsolv TN by the company Finetex 8% - silicones 10.5% - emulsifiers 2% - TiO 2 sold under the trade name MT 100 T by Tayca (photoprotective agent) 10% - fluorosilicate sodium and magnesium sold under the trade name Submica E by the company Wackherr 3% - triethanolamine 0.45% - moisturizers 8% - preservatives qs - demineralised water qs 100%
A comparative oil-in-water emulsion F was then prepared, with the same support as emulsion E, but representative of a conventional antisolar emulsion comprising a combination of polymers as a thickening system.

In the emulsion F, the sodium and magnesium fluorosilicate was replaced by a combination of a neutralized acrylic polymer with triethanolamine (Goodrich Carbopol 980) and a cellulose derivative (Methocel F4M).
Dow Chemical) in a proportion which makes it possible to obtain similar viscosities for emulsions E and F. Emulsion F has the following composition - 2.5% stearic acid - 0.5% cetyl alcohol - C12 alcohols benzoate C15 sold under the trade name Finsolv TN by the company Finetex 8% - silicones 10.5% - emulsifiers 2% - TiO 2 sold under the trade name MT 100 T by Tayca 10% - carbomer sold under the trade name Carbopol 980 by the company Goodrich 0.3% - hydroxypropyl methylcellulose sold under the trade name Methocel F4M by Dow Chemical 0.1% - triethanolamine 0.75% - moisturizers 8% - preservatives qs - demineralized water qs 100%
For each emulsion E and F, the SPF was determined according to the same protocol as in Example 1.

The results (mean value corresponding to three trials) are summarized in Table (III) below.
Table (here):

<tb> emulsion <SEP> E <SEP> (invention) <SEP> F <SEP> (comparative)
<tb><SEP> SPF <SEP> average <SEP> 17.5 <SEP> 8.3
<Tb>
These results clearly show that for an identical photoprotective system (nanopigment of titanium oxide MT 100 T), the emulsion E according to the invention has a photoprotective power significantly higher than that obtained with a conventional emulsion containing no sodium fluorosilicate and magnesium.

EXAMPLE 4
This example is intended to show the improvement in the water permeability of sunscreens for a composition according to the invention compared to a composition containing no mixed fluorosilicate according to the invention.

For this, an antisolar emulsion G according to the invention comprising an active liposoluble filter in the UVB, namely octyl methoxycinnamate (Parsol MCX), and in the form of an oil-in-oil emulsion, was prepared for this purpose. water of the following composition: - 2.5% stearic acid - 0.5% cetyl alcohol - C12-C15 alcohols benzoate sold under the trade name Finsolv TN by the company Finetex 8% - silicones 10.5% - emulsifiers 2% - octylmethoxycinnamate sold under the trade name Parsol MCX by Givaudan 5% - sodium and magnesium fluorosilicate sold under the trade name Submica E by the company Wackherr 3% - triethanolamine 0, 45% - hyd rants 8% - preservatives qs - demineralized water qs 100%
A comparative oil-in-water emulsion H was then prepared, with the same support as the emulsion G and comprising the same photoprotective system in the same proportion but, as in Example 3, representative of a conventional sunscreen emulsion comprising combination of polymers as a thickening system. In the emulsion H, the sodium and magnesium fluorosilicate was thus replaced by the combination of an acrylic polymer neutralized with triethanolamine (Carbopol 980) and a cellulose derivative (Methocel F4M) in a proportion allowing to obtain close viscosities for the G and H emulsions.

Emulsion H has the following composition: 2.5% stearic acid 0.5% cetyl alcohol C12-C15 alcohol benzoate sold under the trade name Finsolv TN by the company Finetex 8% silicones 10.5 % - 2% - octylmethoxycinnamate emulsifiers sold under the trade name Parsol MCX by Givaudan 5% - carbomer sold under the trade name Carbopol 980 by the company Goodrich 0.3% - hydroxypropyl methylcellulose sold under the trade name Methocel F4M by the company Dow Chemical 0.1% - triethanolamine 0.58% - moisturizers 8% - preservatives qs - demineralised water qs 100%
The water permeability of Parsol MCX, for each of the emulsions G and H, was evaluated in vitro according to the following protocol: eight samples of each of formulas G and H were prepared, each of these samples being applied at a rate of 1 , 5 mg / cm 2, on a rectangle of wool fabric (Worsted Flannel 4 cm x 8 cm) then the tissue containing the samples is dried at room temperature for 10 minutes.

For each of the formulas G and H, four of the eight samples serve as control samples. they are extracted from the tissue with a suitable solvent (isopropanol or ethanol) and their respective concentration of Parsol MCX is determined spectrophotometrically.

The remaining four samples (hereinafter bath samples) are immersed in a thermostatically controlled water bath at 28 ° C. with stirring for 20 minutes, then dried in an oven at 66 ° C. for 1 hour and then extracted from the fabric. of wool by the same solvent as that used in the previous step. Their respective concentration in Parsol MCX is then determined spectrophotometrically.

The percentage of remanence is calculated in general for a filter (p given according to the following formula:% Remanence = the amount of Cl remained on the tissue after bath x 100
(Quantity of (p deposited on the fabric) x (extraction yield) in which the extraction yield is expressed by the following ratio:
Extraction yield = Quantity of # on the tissue (control echoes) x 100
Quantity of PC deposited (weighed)
The percentage of remanence thus corresponds to the percentage of filter (p residual on a given support after immersion of this support.

Here the metered filter is octyl methoxycinnamate (Parsol MCX).

The results for the emulsions G and H are recorded in the following table (IV):
Table (1V):

<tb> Emulsion <SEP> G <SEP> (Invention) <SEP> H <SEP> (Comparative)
<tb><SEP>%<SEP> Retention <SEP> in <SEP><SEP> Parsol <SEP> MCX <SEP><SEP> 66 <SEP>% <SEP> 18 <SEP>%
<Tb>
These results clearly show the improvement in the water remanence of Parsol MCX by the compositions according to the invention compared to compositions whose thickening system does not comprise sodium fluorosilicate and magnesium according to the invention. .

EXAMPLE 5
The following is a concrete example of an after-sun in the form of an oil-in-water emulsion (the quantities are expressed as% by weight relative to the total weight of the composition)
Phase A1: sodium magnesium fluorosilicate sold under the trade name Submica E by the company Wackherr 2% -Phase A2: glycerin 6% propylene glycol 6% preservatives qs
Phase B: - C12 / C15 alcohols benzoate sold under the trade name Finsolv TN by the company Finetex 4%
Phase C: acrylic acid / C10-C30 alkyl acrylate copolymer sold under the trade name
Pemulen TR-1 by the company Goodrich 0.4% - cyclopentadimethylsiloxane sold under the trade name Silicone DC 245 Fluid by Dow Corning 8%
Phase D: - triethanolamine qs pH = 6.5
Phase E: - bisabolol 0.5% - antioxidant qs
Phase F: - purified water qs 100%
This emulsion was prepared in the following manner: phase A2 was mixed with part of phase F and then added to phase A1. Phase B was then added to make the emulsion. Then phase C was added again. The mixture was then neutralized with phase D. Finally phase E was added and then the remainder of phase F.

Claims (19)

Cosmetic and / or dermatological composition comprising, in a cosmetically and / or dermatologically acceptable support, a photoprotective system capable of filtering UV rays (UV-A and / or UV-B) and a thickening system, characterized in that said thickening system comprises a mixed fluorosilicate of alkali and alkaline earth with swelling and emulsifying properties. 2. Composition according to claim 1, characterized in that said mixed fluorosilicate is a fluorosilicate of sodium and magnesium. 3. Composition according to Claim 2, characterized in that the sodium and magnesium fluorosilicate corresponds to the following formula:  (Na2O) x (go), (SiO2) z Mg F2 in which 0 1 <x <0.5  1.5 <y <2 3.5 5 <z <4. 4. Composition according to any one of claims 1 to 3, characterized in that the mixed fluorosilicate of alkali and alkaline earth is present in the composition at a content ranging from 0.1 to 20% by weight. , relative to the total weight of the composition. 5. Composition according to claim 4, characterized in that this content ranges from 0.5 to 10% by weight, relative to the total weight of the composition. 6. Composition according to any one of claims 1 to 5, characterized in that said photoprotective system consists of one or more organic UV absorber filters and / or one or more (nano) mineral pigments. 7. Composition according to Claim 6, characterized in that the organic screening agent (s) is (are) chosen from 2-phenylbenzimidazole 5-sulfonic acid and its salts, cinnamic derivatives, salicylic derivatives, camphor derivatives, derivatives thereof. triazine, benzophenone derivatives, dibenzoylmethane derivatives, p, p-diphenylacrylate derivatives, paminobenzoic acid derivatives, menthyl anthranilate, filter polymers and filter silicones. 8. Composition according to claim 6 or 7, characterized in that the one or more organic filters are present in the composition at a content of between 0.1% and 30% by weight, relative to the total weight of the composition. 9. Composition according to Claim 8, characterized in that the said content ranges from 0.5 to 15% by weight, relative to the total weight of the composition. 10. Composition according to any one of claims 6 to 9, characterized in that the or (nano) pigmerjts minerals are selected from oxides of titanium, zinc, iron, zirconium, cerium and mixtures thereof, coated or not. 11. The composition of claim 10, characterized in that the or (nano) inorganic pigments are nanopigments of titanium oxide, coated or uncoated. 12. Composition according to claim 10 or 11, characterized in that the or the (nano) mineral pigments are present in the composition at a content ranging from 0.1% to 30%, by weight, relative to the total weight of the composition. 13. Composition according to Claim 12, characterized in that the said content ranges from 0.5 to 10% by weight, relative to the total weight of the composition. 14. Composition according to any one of claims 6 to 13, characterized in that it implements nanopigments. 15. Composition according to any one of claims 1 to 14, characterized in that it is in the form of an aqueous continuous phase dispersion. 16. Composition according to claim 15, characterized in that it is in the form of a gel-cream. 17. Composition according to any one of claims 1 to 16, characterized in that said thickening system further comprises an acrylic acid / alkyl acrylate copolymer Cl 0 -C30. 18. Composition according to any one of claims 1 to 17, characterized in that it further comprises at least one agent for tanning and / or browning of the skin. 19. A cosmetic treatment method for protecting the skin and / or hair against ultraviolet radiation, in particular solar radiation, characterized in that it consists in applying to the latter an effective amount of a composition as defined in any one of claims 1 to 18.