FR2983068A1 - Liquid composition in oil-in-water emulsion form, useful to fragrance or treat/care human keratin material, comprises dispersed oil phase comprising nonpolar hydrocarbon oil, continuous aqueous phase and hydrophobic silica aerogel particle - Google Patents

Abstract

Liquid composition in the form of an oil-in-water emulsion comprises: a dispersed oil phase comprising at least one nonpolar hydrocarbon oil; a continuous aqueous phase comprising at least one 1-4C monoalcohol; and hydrophobic silica aerogel particles.

Description

The present invention relates to the field of cosmetics, and in particular to the field of compositions in the form of droplets in suspension in liquid used after stirring. It relates more particularly to a liquid composition in the form of an oil-in-water emulsion comprising in a cosmetically acceptable medium: (i) a dispersed oily phase comprising at least one apolar hydrocarbon oil; (ii) a continuous aqueous phase comprising at least one C1-C4 monoalcohol and (iii) hydrophobic silica airgel particles. There exist in the present market bi-phasic compositions which attract consumers by their aesthetics. These compositions consist of two immiscible phases together, mixing extemporaneously by shaking before use. Unlike the compositions of the present invention, the two phases of these compositions are two distinct layers superimposed, of different colors from each other, without forming particular patterns, and separated by a very distinct interface. Application FR 2 208 642 teaches the use and the preparation, in general, of two-phase liquid cosmetic compositions, of the Pickering emulsion type, which are attractive in view of the fact that the oily phase is dispersed in the form of droplets in a homogeneous mixture between an organic liquid and water. Finely divided solid particles are adsorbed in the interface between the oil and the homogeneous mixture and stabilize the oily droplets. However, there is no mention in this document of compositions comprising particles of a hydrophobic airgel material. Patent EP 1 005 849 discloses Pickering-type emulsion compositions for the treatment of the hair or the scalp. In general, conventional emulsions are stabilized with surfactants which, by virtue of their amphiphilic structure, are placed at the interface between the lipophilic phase and the hydrophilic continuous phase, thus stabilizing the dispersed oil droplets. However, the presence of surfactants has various disadvantages, including being sometimes poorly tolerated in some users. No. 2,208,642 proposes to stabilize the emulsions with finely divided solid particles of small size, such as, for example, talc.

However, these emulsions tend to destabilize storage over time. Indeed, there is a phenomenon of sedimentation of solid particles or even a phenomenon of phase shift leading to an unattractive appearance for the consumer. There is therefore a need for a Pickering emulsion-type composition having better long-term stability. The present invention aims to meet this need. Unexpectedly, the inventors have demonstrated, in the context of the present application, that the use of particles of a hydrophobic airgel material solves the sedimentation problem observed with the solid particles.

Thus, the present invention firstly relates to a liquid composition in the form of an oil-in-water emulsion, comprising in cosmetically acceptable medium: (i) a dispersed oily phase comprising at least one apolar hydrocarbon oil; (ii) a continuous hydroalcoholic phase comprising at least one C 1 -C 4 monoalcohol and (iii) hydrophobic silica airgel particles. "Cosmetically acceptable medium" means a medium compatible with the skin and / or its integuments or mucous membranes which has a pleasant color, odor and feel and which does not generate unacceptable discomfort (tingling, tightness, redness), likely to divert the consumer from using this composition. By "hydroalcoholic phase" is meant a phase comprising at least water and an organic compound comprising at least one OH function. To the knowledge of the inventors, it has never been proposed, in order to solve the sedimentation problems of the solid particles used in Pickering emulsions, to replace these solid particles with particles of an airgel material; hydrophobic. Such a change in the nature of the particles used in Pickering emulsions thus gives these emulsions improved long-term stability. For the purposes of the present invention, the term "stable long-term composition" means a composition which does not exhibit any significant alteration of its structure as well as its properties at least 1 month after its manufacture, in particular at least 2 months after its manufacture.

Preferably, a composition according to the invention may be chosen from a deodorant composition, a composition for the hair care and a perfuming composition. In addition, the use of particles of hydrophobic airgel material makes it possible to obtain droplets of transparent lipophilic dispersed phase, which can be described as crystalline. They thus have a particular aesthetic, giving them a strong attractiveness for the consumer, especially with respect to Pickering emulsion compositions using solid particles such as talc particles, which make the droplets opaque.

As stated above, a composition according to the invention also has the advantage of not requiring the presence of surfactants and thus to overcome a number of disadvantages, such as those set forth in the present invention. Application FR 2 208 642. A composition according to the invention may also comprise at least one lipophilic or liposoluble dye and / or at least one hydrophilic or water-soluble dye. The compositions according to the invention provide, with respect to the usual galenics, in particular hydroalcoholic solutions, a significant moisturizing effect as well as better sensory effects such as a more silky touch on the skin and less drying effect.

The cosmetic agent (s) contained in the cosmetic compositions according to the invention can be varied. Thus, the cosmetic agents that can be used in the compositions of the present invention can be chosen in particular from perfumes, active agents for the care and / or treatment of the skin and active ingredients for the care and / or the hair treatment. .

The present invention also relates to a process for perfuming human keratin materials and / or a garment in contact with said keratin materials, comprising applying to said keratin materials and / or said garment a composition according to the invention. The present invention also relates to a process for the cosmetic treatment and / or cosmetic care of human keratin materials, comprising the application to said keratin materials of a composition according to the invention.

By "human keratin materials" is meant the skin (body, face, eye area), hair, eyelashes, eyebrows, hair, nails, lips, mucous membranes. The compositions in accordance with the invention can be easily prepared cold or at room temperature. ambient temperature contrary to known emulsion manufacturing techniques generally prepared hot. Emulsions may be mentioned by simple stirring, for example using a blade mixer. Preferably, the composition of the invention will be in liquid form. For the purposes of the present invention, the term "liquid composition" means a composition which does not appear in a solid form and whose viscosity, measured using a Rheomat 180 viscometer at 25 ° C. at the rotation speed of 200 RPM after 10 minutes of rotation is less than or equal to 2 Pa.s and more preferably ranges from 0.01 to 0.5 Pa.s. Within the meaning of the present invention, the term "surfactant" means an amphiphilic molecule, that is to say that it has two parts of different polarity, one lipophilic (which retains fat) and nonpolar the other hydrophilic (miscible in water) and polar. Thus, the solid particles in accordance with the invention are not considered as surfactants within the meaning of the present invention. Oily dispersed phase As indicated above, a composition according to the invention comprises a dispersed oily phase comprising at least one apolar hydrocarbon oil. For the purposes of the present invention, the term "apolar oil" means an oil whose solubility parameter at 25 ° C 8a is equal to 0 (J / cm 3) V 2. The definition and calculation of the solubility parameters in the HANSEN three-dimensional solubility space are described in the article by C. M. Hansen: "The three dimensional solubility parameters" J. Paint Technol. 39, 105 (1967). According to this Hansen space: 30 - 8D characterizes the LONDON dispersion forces resulting from the formation of dipoles induced during molecular shocks; - Sp characterizes the DEBYE interaction forces between permanent dipoles as well as the KEESOM interaction forces between induced dipoles and permanent dipoles; - 8h characterizes the specific interaction forces (hydrogen bond, acid / base, donor / acceptor type, etc.); and - 8a is determined by the equation: Sa = (8p2 + 8112) V2.

The parameters Sp, 8h, 8D and 8a are expressed in (J / cm3) `/ 2. An apolar oil according to the invention is hydrocarbon-based. By "hydrocarbon oil" is meant an oil formed essentially, or even constituted, of carbon and hydrogen atoms, and possibly of oxygen, nitrogen, and not containing a silicon atom or fluorine. It may contain alcohol, ester, ether, carboxylic acid, amine and / or amide groups. According to one embodiment, the apolar hydrocarbon oil according to the invention is devoid of heteroatom (s). By heteroatom is meant an atom other than carbon or hydrogen. The apolar oil according to the invention may be non-volatile.

The term "non-volatile oil" means any oil having a vapor pressure at ambient temperature and atmospheric pressure, non-zero less than 0.02 mm Hg and better still less than 10-3 mm Hg. A non-polar hydrocarbon oil conforming to the invention advantageously represents from 5% to 40% by weight of the total weight of the composition, preferably from 5% to 30% by weight, preferably from 10% to 30% by weight relative to the total weight of the composition container. According to a preferred embodiment, the apolar hydrocarbon oil used in the present invention is nonvolatile, and may advantageously be chosen from saturated, linear or branched alkanes. An apolar hydrocarbon oil according to the invention may be chosen from oils whose molecular mass is between 300 and 900 g / mol, preferably between 350 and 800 g / mol. According to a preferred embodiment, the apolar hydrocarbon oil is chosen from linear or branched hydrocarbons of mineral or synthetic origin, preferably from a liquid paraffin oil, volatile or nonvolatile, hydrogenated isoparaffin, naphthalene, partially or completely hydrogenated liquid polydecene, isoeicosane, a decene / butene copolymer, or a polybutene / polyisobutene copolymer and mixtures thereof. Hydrocarbon means a compound consisting of carbon and hydrogen. According to a particular embodiment, use will preferably be made of nonpolar hydrocarbon oils: hydrogenated isoparaffins, such as, for example, the hydrogenated polyisobutene sold under the name Parleam by Rossow or under the name Polysynlane by Nippon oil & Fat or Polyesther Corp .; isoparaffin C8-C9 sold under the name Isopar E by Exxon Mobil Chemical; the isoparaffin Cii-C13 from EXXON sold under the name Isopar L, or the isoparaffin C13-C14 sold under the name Isopar M by the company Exxonmobil Chemical; the liquid paraffins from Petro Canada: Puretol 9 , or Blandol de Sonneborn, or Marcol 82 marketed by Exxonmobil Chemical, and - the plant perhydrosqualenes sold under the name squalane olive by SOS corporation Alimentaria, or Vegetable squalane by lake oil, or Exolive by Caroi Line Cosmetica. A dispersed oily phase according to the invention is in the form of spheres of more or less homogeneous size which can vary from 0.5 to 20 mm, preferably from 0.5 to 10 mm, preferably from 1 to 5 mm. The number of oily spheres will vary depending on the percentage of perfume and oil. It can be from 1 to several million per liter of formulation depending on their size. These spheres may be present in the upper or lower part of the composition comprising them or in both parts of the composition. A dispersed oily phase according to the invention may also comprise at least one liposoluble coloring agent. Such a dye may be of natural or synthetic origin. For the purposes of the invention, the term "liposoluble dye" means any generally organic compound, natural or synthetic, soluble in an oily phase. For example, a liposoluble dye according to the invention may be mentioned: a violet organic dye, D & C VIOLET No. 2 K7014. Chemical name: SS alizurol purple; - a green organic dye, D & C GREEN NO. 6 K7016 / 90097 D & C GREEN 6. Chemical name: quinizarin green E SS; - a pink organic dye, D & C RED # 21 K7061 / SUNCROMA D & C RED 21 C 14-032. Chemical name: Eosine; and - an orange vegetable dye, BETATENE 30% OLV. Dwarf Chemical: Carotenoids (CI.75130-E160 A) at 30% in olive oil.

The liposoluble dyes in accordance with the invention may also be chosen from Sudan red, D & C Red 17, 3-carotene, Sudan brown, D & C Yellow 11, D & C Orange 5, yellow quinoline and annatto. The dispersed oily phase according to the invention may further comprise other oils, such as silicone oils, vegetable oils insofar as these do not alter the stability of the composition according to the invention. Continuous hydroalcoholic phase As indicated above, a composition in accordance with the invention comprises, in addition to a dispersed oily phase, a continuous aqueous phase comprising at least one C 1 -C 4 monoalcohol. A monoalcohol according to the invention may preferably be chosen from linear hydroxy-C 1 -C 4. Ethanol will be used more particularly. Such mono-alcohol may be present in a content ranging from 50% to 90% by weight, preferably from 53% to 70% by weight relative to the total weight of the composition. This continuous aqueous phase comprises at least water. This is preferably present in a content ranging from 0.5% to 10% by weight, and more preferably from 1% to 5% by weight relative to the total weight of the composition according to the invention. The continuous hydro-alcoholic phase in accordance with the invention may also comprise at least one water-soluble dye. This may be of synthetic or vegetable origin.

By "water-soluble dye", within the meaning of the invention, is meant any generally organic compound, natural or synthetic, soluble in an aqueous phase or in water-miscible solvents such as C 1 -C 4 monoalcohols and suitable for to color. As water-soluble dyes that are suitable for the invention, water-soluble synthetic or natural dyes, such as, for example, FDC Red 4, DC Red 6, DC Red 22, DC Red 28, DC Red 30, DC Red 33, DC Orange 4, DC Yellow 5, DC Yellow 6, DC Yellow 8, FDC Green 3, DC Green 5, FDC Blue 1, betanin (beet), carmine, chlorophylline copper, methylene blue, anthocyanins (enocianin, black carrot, hibiscus, elderberry), caramel and riboflavin. According to a particularly preferred form of the invention, the dispersed oily phase and the continuous aqueous phase are adjusted so that the absolute value of the difference in density (Ad) between the dispersed oily phase and the continuous aqueous phase is from plus 0.05, advantageously at most 0.01.

According to a particularly preferred form of the invention, the dispersed phase comprises at least one liposoluble dye and the continuous phase at least one water-soluble dye. Thus, the addition of at least one dye in each of the phases of a Pickering emulsion-type composition makes it possible in an attractive manner to give these phases different hues and to obtain, after proper stirring, a third distinct hue. of the two previous ones. In addition, the dye (s) present respectively (i) in the dispersed oily phase and (ii) in the continuous hydroalcoholic phase may also constitute markers of homogeneity of the composition, allowing the A composition according to the invention also comprises hydrophobic silica airgel particles, intended to stabilize the composition according to the invention, and to determine directly and directly whether the composition according to the invention is sufficiently homogenized. the invention by positioning itself at the disperse phase / continuous phase interface.

Aerogels are ultra-light porous materials, the first of which were made by Kristler in 1932. They are generally synthesized by a sol-gel process in a liquid medium and then dried by extraction of a supercritical fluid. The most commonly used supercritical fluid is supercritical CO2. This type of drying avoids the contraction of the pores and the material. Other types of drying also make it possible to obtain porous materials from gel, namely (i) drying by freeze drying, consisting of solidifying at low temperature the gel and then subliming the solvent and (ii) drying by evaporation . The materials thus obtained are called cryogels and xerogels respectively. The sol-gel process and the various dryings are described in detail in Brinker CJ, and Scherer GW, Sol-Gel Science: New York: Academic Press, 1990. By "hydrophobic silica" is meant any silica whose surface is treated by silylating agents, for example by halogenated silanes such as alkylchlorosilanes, siloxanes, in particular dimethylsiloxanes such as hexamethyldisiloxane, or silazanes, so as to functionalize the OH groups by Si-Rn silyl groups, for example trimethylsilyl groups. Preferably, the hydrophobic airgel particles which can be used in the present invention advantageously have a specific surface area per unit mass (SM) of from 500 to 1500 m 2 / g, preferably from 600 to 1200 m 2 / g and more preferably from 600 to 800 m 2 / g and / or have an oil absorption capacity measured with WET POINT ranging from 5 to 18 mllg particles, preferably from 6 to 15 mllg and more preferably from 8 to 12 ml / g. The absorption capacity measured at Wet Point, and denoted Wp, corresponds to the amount of oil which must be added to 100 g of particles in order to obtain a homogeneous paste. It is measured according to the so-called Wet Point method or method for determining the setting of powder oil according to the principle described in standard NF T 30-022. It corresponds to the amount of oil adsorbed on the available surface of the powder and / or absorbed by the powder by measuring the Wet Point, described below: A quantity m = 2 g of powder is placed on a glass plate then the oil (isononyl isononanoate) is added dropwise. After addition of 4 to 5 drops of oil in the powder, mixing with a spatula and continuing to add oil until the formation of oil conglomerates and of powder. From this moment, the oil is added one drop at a time and then triturated with the spatula. The addition of oil is stopped when a firm and smooth paste is obtained. This paste should be spread on the glass plate without cracks or lumps. The volume Vs (expressed in ml) of oil used is then noted. The oil intake corresponds to the ratio Vs / m. The hydrophobic silica airgel particles used according to the present invention are preferably silylated silica airgel particles (INCI name silica silylate).

The preparation of hydrophobic silica airgel particles surface-modified by silylation is further described in US 7,470,725. In particular, hydrophobic silica airgel particles which are surface-modified with trimethylsilyl groups, namely trimethylsiloxylated silica particles, will be used.

The hydrophobic airgel particles that can be used in the present invention advantageously have a size, expressed as the average diameter (D [0.5]), of less than 1500 μm and preferably of from 1 to 30 μm, preferably of 5 to I.tm, better from 5 to 20 μm and even better from 5 to 15 μm. The specific surface area per unit mass can be determined by the nitrogen absorption method called the BET method (BRUNAUER - EMMET - TELLER) described in "The Journal of the American Chemical Society", vol. 60, page 309, February 1938 and corresponding to the international standard ISO 5794/1 (Appendix D). The BET surface area corresponds to the total specific surface area of the particles under consideration. The sizes of the airgel particles according to the invention can be measured by static light scattering using a MasterSizer 2000 commercial particle size analyzer from Malvern. The data is processed on the basis of Mie scattering theory. This theory, which is accurate for isotropic particles, makes it possible to determine, in the case of non-spherical particles, an "effective" diameter of particles. This theory is particularly described in Van de Hulst, HC, "Light Scattering by Small Particles," Chapters 9 and 10, Wiley, New York, 1957. According to an advantageous embodiment, the hydrophobic airgel particles used in the present invention have a surface area per unit mass (SM) ranging from 600 to 800 m 2 / g and a size expressed in volume mean diameter (D [0.5]) ranging from 5 to 20 μm, better still 5 at 15 p.tm. According to a preferred embodiment, the VM-2270, whose particles have an average size ranging from 5 to 15 microns and a specific surface area per mass unit ranging from 600 to 800 m 2 / g, will be used more particularly. The hydrophobic airgel particles used in the present invention may advantageously have a packed density p ranging from 0.04 g / cm 3 to 0.10 g / cm 3, preferably from 0.05 g / cm 3 to 0.08 g / cm 3 . In the context of the present invention, this density can be assessed according to the following protocol, called the packed density protocol: 40 g of powder are poured into a graduated cylinder and the test piece is placed on a STAV 2003 machine from ST. II F VOLUMETER. The test piece is then subjected to a series of 2500 settlements (this operation is repeated until the difference in volume between two consecutive tests is less than 2%); then the final volume Vf of packed powder is measured directly on the specimen. The packed density is determined by the ratio mass (m) / Vf, in this case 40 / Vf (Vf being expressed in cm3 and m in g). According to one embodiment, the hydrophobic airgel particles used in the present invention have a specific surface area per volume unit SV ranging from 5 to 60 m 2 / cm 3, preferably 10 to 50 m 2 / cm 3 and more preferably 15 to 15 m 2 / cm 3. 40 m2 / cm3. The specific surface per unit volume is given by the relation: SV = SM * p where p is the packed density expressed in g / cm 3 and SM is the specific surface per unit mass expressed in m2 / g, as defined above. . According to a preferred embodiment, the hydrophobic airgel particles according to the invention have a specific surface per unit mass (SM) ranging from 500 to 1500 m 2 / g, preferably from 600 to 1200 m 2 / g and better still 600 to 800 m2 / g, and a size expressed in average diameter (D [0.5]) ranging from 1 to 30 pm and / or an oil absorption capacity measured with WET POINT ranging from 5 to 18 ml / g of particles, preferably 6 to 15 ml / g and more preferably 8 to 12 ml / g.

Examples of hydrophobic silica aerogels that can be used in the invention include, for example, the airgel marketed under the name VM-2260 (INCI name Silica silylate), by the company Dow Coming, whose particles have an average size. about 1000 microns and a specific surface area per unit mass ranging from 600 to 800 m2 / g. There may also be mentioned the aerogels marketed by Cabot under the references AEROGEL TLD 201, AEROGEL OGD 201 and AEROGEL TLD 203, ENOVA AEROGEL MT 1100 and ENOVA AEROGEL MT 1200. More particularly, the airgel marketed under the trade name VM- 2270 (INCI name Silica silylate), by the company Dow Coming, whose particles have an average size ranging from 5 to 15 microns and a specific surface per unit mass ranging from 600 to 800 m2 / g. The hydrophobic silica airgel particles may be used in a content of preferably between 0.05 and 5% by weight, more preferably between 0.1 and 2% by weight, more preferably between 0.1 and 1% by weight relative to the total weight of the composition containing them Cosmetic Agents The composition may comprise at least one or more additional cosmetic agent (s). The additional cosmetic agent (s) contained in the cosmetic compositions according to the invention are varied. Said cosmetic agents include, in particular, perfumes, active agents intended for the care and / or treatment of the skin, and active agents intended for care and / or treatment of the hair. The cosmetic active agent (s) according to the invention can be chosen from: anti-aging / anti-wrinkle agents, moisturizing agents, anti-aging agents -radicals, - agents acting on microcirculation, - muscle relaxants, - soothing agents such as a-bisabolol, allantoin, aloes vera, and - their mixtures. Emollients or softeners such as sweet almond oil, apricot kernel oil, vitamins, essential fatty acids, insect repellents, propellants, peptizers, UV filters, stabilizers or preservatives, gelling agents or thickeners, nacres, glitter and mixtures thereof.

Of course, the additional cosmetic agents that may be present in a composition according to the invention must not alter the advantageous properties previously indicated. These cosmetic agents may as well be present in the dispersed phase as in the continuous phase of a composition according to the invention. Thus, the hydrophilic or water-soluble agents will be present in the continuous phase while the lipophilic or liposoluble agents will be present in the dispersed phase. 1. Perfuming Substances A composition according to the invention may further comprise at least one perfuming substance, or perfume. "Perfuming substance" means any fragrance or aroma likely to give off a pleasant odor. Fragrances are compositions containing, in particular, the raw materials described by S. Arctander, Perfurne and Flavor Chemicals (Montclair, NJ, 1969), in S. Arctander, Perfume and Flavor Materials of Natural Origin (Elizabeth, NJ, 1960) and in "Flavor and Fragrance Materials - 1991", Allured Publishing Co. Wheaton, 111. They may also be natural products, such as essential oils, absolutes, resinoids, resins, concretes, and / or synthetic products (terpene or sesquiterpenic hydrocarbons, alcohols, phenols, aldehydes, ketones, ethers, acids, esters, nitriles, peroxides, saturated or unsaturated, aliphatic or cyclic).

According to the definition given in International Standard ISO 9235 and adopted by the European Pharmacopoeia Commission, an essential oil is a fragrant product generally of complex composition, obtained from a botanically defined plant raw material, either by steam distillation of water, either by dry distillation or by a suitable mechanical process without heating (cold expression). The essential oil is most often separated from the aqueous phase by a physical process that does not entail a significant change in the composition. Physico-chemical characteristics Essential oils are usually volatile and liquid at room temperature, which differentiates them from so-called fixed oils. They are more or less colored and their density is generally lower than that of water. They have a high refractive index and most deflect polarized light. They are liposoluble and soluble in the usual organic solvents, entrainable with water vapor and very little soluble in water. Among the essential oils that may be used according to the invention, mention may be made of those obtained from plants belonging to the following botanical families: Abietaceous or Pinaceae: conifers; Amaryllidaceae; Anacardiaceae; Anonaceae: ylang; Apiaceae (eg umbelliferae): dill, angelica, coriander, sea fennel, carrot, parsley; Aracées; Aristolochiaceae; Asteraceae: achiliate, mugwort, chamomile, helichrysum; Betulaceae; Brassicaceae; Burseraceae: incense; Caryophyllaceae; Canellaceae; Césalpiniaceae: copaïfera (copahu); Chenopodaceae; Cistaceae: rockrose; Cyperaceae; Dipterocarpaceae; Ericaceae: wintergreen; Euphorbiaceae; Fabaceae; Geraniaceae: geranium; Guttifers; Hamamelidaceae; Hemandiaceae; Hypericaceae: St. John's wort; Iridaceae; Juglandaceae; Lamiaceae: thyme, oregano, shrimps, savory, basil, marjoram, mint, patchouli, lavender, sage, catnip, rosemary, hyssop, lemon balm, rosemary; Lauraceae: ravensara, laurel, rosewood, cinnamon, litsea; Liliaceae: garlic; Magnoliaceae: magnolia; Malvaceae; Meliaceae; Monimiaceae; Moraceae: hemp, hops; Myricaceae; Mysristicaceae: nutmeg; Myrtaceae: eucalyptus, tea tree, niaouli, cajeput, backousia, clove, myrtle; Oleaceae; Piperaceae: pepper; Pitosporaceae; Poaceae: lemongrass, lemongrass, vetiver; Polygonaceae; Renonculaceae; Rosaceae: roses; Rubiaceae; Rutaceae: all citrus; Salicaceae; Santalaceae: sandalwood; Saxifragaceae; Schisandracées; Styracaceae: benzoin; Thymelaceae: agarwood; Tilliaceae; Valerianaceae: valerian, nard; Verbenaceae: lantana, verbena; Violaceae; Zingiberaceae: galangal, turmeric, cardamom, ginger; Zygophyllaceae.

We can also mention the essential oils extracted from flowers (lily, lavender, rose, jasmine, ylang-ylang, neroli), stems and leaves (patchouli, geranium, petit-grain), fruits (coriander, anise, cumin, juniper), fruit peel (bergamot, lemon, orange), roots (angelica, celery, cardamom, iris, acore, ginger), wood (pine wood, sandalwood, guaiac, rose cedar, camphor), d herbs and grasses (tarragon, rosemary, basil, lemon grass, sage, thyme), needles and branches (spruce, fir, pine, dwarf pine), resins and balms (galbanum, elemi, benzoin, myrrh , oliban, opopanax). Examples of perfuming substances are in particular: geraniol, geranyl acetate, farnesol, borneol, bomyl acetate, linalool, linalyl acetate, linalyl propionate, linalyl butyrate, tetrahydrolinalol citronellol, citronellyl acetate, citronellyl formate, citronellyl propionate, dihydromyrcenol, dihydromyrcenyl acetate, tetrahydromyrcenol, terpineol, terpinyl acetate, nopol, nopyl acetate, nerol, neryl acetate, 2-phenylethanol, 2-phenylethyl acetate, benzyl alcohol, benzyl acetate, benzyl salicylate, styrallyl acetate, benzyl benzoate, amyl salicylate, dimethylbenzyl carbinol, trichloromethylphenylcarbinyl acetate, p-tert-butylcyclohexyl acetate, isononyl acetate, vettiveryl acetate, vetoterol, alpha-hexylcinnamaldehyde, 2 -methyl-3- (p-tert-butylphenyl) propanal, 2-methyl-3- (pisopropylphenyl) propanal, 3- (p-tert-butylphenyl) propanal, 2,4-dimethylcyclohex-3-enylcarboxaldehyde, tricyclodecenyl acetate, tricyclodecenyl propionate, 4- (4-hydroxy-4-methylpentyl) -3-cyclohexenecarboxaldehyde, 4- (4-methyl-3-pentenyl) -3-cyclohexenecarboxaldehyde, 4-acetoxy-3-pentyl-tetrahydropyran, 3-carboxymethyl-2 -pentylcyclopentane, 2-n-4-heptylcyclopentanone, 3-methyl-2-pentyl-2-cyclopentenone, menthone, carvone, tagetone, geranyl acetone, n-decanal, n-dodecanal, 9 -decenol-1, phenoxyethyl isobutyrate, phenylacetaldehyde dimethylacetal, phenylacetaldehyde diethylacetal, geranonitrile, citronellonitrile, cyroyl acetate, 3-isocamphylcyclohexanol, cedaryl methyl ether, isolongifolanone, , hawthorn, heliotropine, coumarin, eugenol, vanillin, diphenyl ether, citral, citronellal, hydroxycitronellal, damascone, ionones, methylionones, isomethylionones, solanone, irones, cis-3-hexenol and its esters, musks-indanes, musks-tetralines, musks-isochromanes, macrocyclic ketones, musks-macrolactones, aliphatic musks, ethylene brassylate, rose essence and mixtures thereof. According to a preferred embodiment of the invention, a mixture of different perfuming substances is used which generate in common a pleasant note for the user. The perfumes are preferably chosen in such a way that they produce notes (head, heart and base) in the following families: hesperidines, aromatics, floral notes, spices, woody plants, gourmands, chyprés, ferns, leather and musks. The compositions of the invention may thus contain a concentration of less than or equal to 30% by weight, in particular from 1% to 25% by weight, preferably from 3% to 15% by weight of perfume substance (s). ) relative to the total weight of the composition comprising According to one particular embodiment, when a composition according to the invention comprises at least 1% by weight of perfume substance (s) relative to the total weight of the composition, then the composition preferably also comprises at least a polyalkylene glycol, especially as defined below. 2. Polyalkylene Glycol A composition in accordance with the invention may also comprise at least one polyalkylene glycol. The presence of such a compound in the perfume compositions in accordance with the invention advantageously makes it possible to incorporate a content greater than or equal to 1% by weight of perfuming substances in a pickering composition according to the invention, without observe the phenomenon of sedimentation and / or phase shift generally observed when the content of perfuming substances reaches such proportions in such compositions. According to one particular embodiment, a polyalkylene glycol in accordance with the invention may have the following formula (I): H 4 O-RL-OH (I), with - R represents a linear alkyl chain having from 1 to 4 carbon atoms, and n is an integer from 4 to 200, preferably from 4 to 40.

According to one particular embodiment, n is an integer ranging from 4 to 20, advantageously from 6 to 10. According to one particular embodiment, a polyalkylene glycol according to the invention is a polyethylene glycol. Thus, according to a preferred embodiment, a polyalkylene glycol according to the invention is a polyethylene glycol with n being an integer ranging from 4 to 20, advantageously from 6 to 10. According to a preferred embodiment, a polyalkylene glycol conforming to the invention may be chosen from PEG-80E, such as the product sold under the trade name Polyethyleneglycol 400 DUB PEG-8 from the company STEARINEERIE DUBOIS or the trade name Polyglycol 400 from the company CLARIANT or the PEG 60E, sold under the name trade name CARBOWAX PEG-300 from DOW CHEMICAL. The polyalkylene glycol (s) is (are) preferably present in the composition in concentrations ranging from 0.1% to 3%, more preferably from 0.5% to 2% by weight relative to the total weight of the composition. According to a preferred embodiment, a composition according to the invention comprises at least 1% by weight relative to the total weight of the composition of at least one perfuming substance and at least one polyalkylene glycol, preferably of formula (I) below : [OR -] - OH (I), where R is a linear alkyl chain having from 1 to 4 carbon atoms, and - n is an integer ranging from 4 to 200, preferably from 4 to 40, preferably from 4 to at 20, preferably from 6 to 10. 3. Deodorant agent A composition according to the invention may further comprise at least one deodorant agent.

Thus, according to one embodiment, a composition according to the invention may be a deodorant composition. The deodorant agents according to the invention may be bacteriostatic agents or bactericidal agents acting on the germs of axillary odors, such as 2,4,4'-trichloro-2'-hydroxydiphenyl ether (®Triclosan), 2,4 dichloro-2'-hydroxydiphenyl ether, 3 ', 4', 5'-trichlorosalicylanilide, 1- (3 ', 4'-dichlorophenyl) -3- (4'-chlorophenypurea (®Triclocarban) or 3.7, 11-trimethyldodeca-2,5,10-trienol (Famesol) They may also be chosen from quaternary ammonium salts such as cetyltrimethylammonium salts, cetylpyridinium salts, DPTA (1,3-diaminopropanetraacetic acid), 1,2 decanediol (Symclariol from Symrise), glycerol derivatives, for example Caprylic / Capric Glycerides (CAPMUL MCM from Abitec), Caprylate or Glycerol caprate (DE OSOFT GMCY and DE 'OSOFT GMC respectively from STRAETMANS Polyglyceryl-2 Caprate (DE 'OSOFT DG ™ from STRAETMANS), biguanide derivatives such as salts of polyhexamethylene biguanide; chlorhexidine and its salts; and 4-Phenyl-4,4-dimethyl-2-butanol (SYMDEO MPP from Symrise). Among the deodorants according to the invention, mention may also be made of zinc salts such as zinc salicylate, zinc gluconate and zinc pidolate; zinc sulphate, chloride. zinc, zinc lactate, zinc phenolsulfonate or salicylic acid and its derivatives such as n-octanoyl-5-salicylic acid. The deodorants according to the invention may be odor absorbers such as zinc ricinoleates, sodium bicarbonate; metallic or non-metallic zeolites, cyclodextrins and alum. It may also be a chelating agent such as Akzo Nobel DISSOLVINE GL-47-S, EDTA; DTPA. It may also be glycerol type polyol, propane 1,3 propane diol (ZEMEA PROPANEDIOL sold by Dupont Tate and Lyle Bio Products), or enzymatic inhibitor such as triethyl citrate. In case of incompatibility or to stabilize them, some of the agents mentioned above may be incorporated into spherules, especially ionic or nonionic vesicles and / or particles (capsules and / or spheres).

The deodorant agents may preferably be present in the compositions according to the invention in weight concentrations ranging from 0.01% to 15% by weight relative to the total weight of the composition. Of course, the deodorant agents that may be present in a composition according to the invention must not alter the advantageous properties of the composition indicated above. Thus, despite the presence of deodorant agents, a composition according to the invention has a dispersed phase and a continuous phase as defined above, each of which can advantageously have a different hue. In addition, when the composition is shaken, it then takes on a new hue, different from that of the dispersed phases and continues at rest, when the stirring has been sufficiently effective that the composition can be used. 4. Hair Agent According to one embodiment, a composition according to the invention may be a hair composition, more particularly intended for the care of the hair and / or the scalp. Thus, an emulsion according to the invention may comprise at least one capillary active agent chosen from: anti-seborrhoeic agents; the agents for combating the desquamative states of the scalp; the active ingredients stimulating the growth and / or promoting the slowing down of the hair loss; antibacterial agents; Calcium antagonists; anti-androgenic agents; steroidal or nonsteroidal inhibitors of 5-a-reductases; - Potassium channel agonists dependent on TIA; - plant extracts with pro-pigmenting activity. Of course, capillary agents which may be present in a composition according to the invention must not alter the advantageous properties previously indicated in the present text. 5. Water-soluble metal salt A composition according to the invention may further comprise at least one water-soluble metal salt. By "water-soluble metal salt" is meant any metal salt, cosmetic or dermatological, capable of being completely dissolved in the molecular state in a liquid aqueous phase comprising water or a mixture of water / monoalcohol in C1- C4. By metal salt is meant according to the present invention a salt of a metal, that is to say a simple body capable of releasing simple cations (Dictionary of Chemistry and its Applications, DUVAL & DUVAL, 3rd Edition, 1978, Technical and Documentation). The water-soluble metal salts are more particularly selected from water-soluble salts of alkali metals or alkaline earth metals. As water-soluble salts of alkali metals useful according to the invention, mention may in particular be made of sodium or potassium salts. As water-soluble salts of alkaline earth metals useful according to the invention, mention may in particular be made of magnesium or calcium salts. These salts may be, for example, carbonates, bicarbonates, sulphates, chlorides, nitrates, acetates, hydroxides, as well as salts of ohydroxy acids or salts of fruit acids (citrate, tartrate, lactate, malate ), or salts of amino acids (aspartate, arginate, glucocholate, fumarate). Preferably a salt according to the invention is selected from calcium chloride and sodium chloride. Preferably, it is calcium chloride. The water-soluble metal salts in accordance with the invention may be present in a content of between 0% and 5% by weight, preferably between 0.2% and 1% by weight relative to the total weight of the composition. Packaging A composition according to the invention may constitute a perfuming composition, a deodorant composition, a care and / or treatment composition for keratinous substances and in particular be in the form of a deodorant product in the form of a spray or an aerosol ("body mist"). "," Body splash "), fresh water, eau de toilette, eau de parfum or aftershave. Preferably, it constitutes a deodorant composition, a hair care composition or a perfume composition. A composition according to the invention may for example be packaged in a bottle.

A composition of the invention can be diffused according to various systems well known to those skilled in the art, such as sprayers with or without gas under pressure, or ball applicators. A composition according to the invention may be manufactured by known methods, generally used in the field of deodorant, hair care or perfume formulations. The compositions according to the invention can also be applied in the form of fine particles by means of pressurizing devices. The devices according to the invention are well known to those skilled in the art and include non-aerosol pumps or "atomizers", piezoelectric devices, aerosol containers comprising a propellant as well as aerosol pumps using air compressed as propellant. The latter are described in particular in US Pat. Nos. 4,077,441 and 4,850,517 (forming an integral part of the content of the description), more particularly relating to perfume compositions. The aerosolized compositions according to the invention generally contain conventional propellants such as, for example, dimethyl ether, isobutane, n-butane, propane or trichlorofluoromethane. As indicated previously, a Pickering emulsion composition according to the invention must be stirred before use in order to give the composition a perfect homogeneity, this being evidenced by the appearance of a new, different hue. those of the dispersed and continuous phases, throughout the composition.

In the following description and examples, unless otherwise indicated, the percentages are by weight and the ranges of values labeled "between ... and ..." include the specified lower and upper bounds. The ingredients are mixed prior to shaping, in order and under conditions readily determined by those skilled in the art. The following examples are presented by way of illustration and not limitation of the field of the invention. EXAMPLES Example 1: Stable composition with 1% perfume * the perfume used comprises 40% Hedione, 15% Geraniol, 22% of linalyl acetate, 2% of ethyl vanillin, 1% of Ambrox DL, % rose essence, 5% citral and 5% patchoulol. ** VM 2270 airgel sold by Dow Corning.

The difference in density between the two phases of the composition is 0.00635. 0.3 Hydrophobic Silica Aerogel ** Hydrogenated Isoparaffin 1.5 ETHYLHEXYL METHOXYCININIA E (and) ETHYLHEXYL SALICYLATE (and) BUTYL METHOXYDIBENZOYLMETHANE (COVABSORB # 14 Sensient) 7.10-4% by weight relative to the total weight of the composition Compounds Water 3 CaC12 0.75 BHT 0.04 Ethanol qs 100 Beta carotene (orange lipophilic dye) PEG 80E 1 Fragrance * - Fuschine disodium salt (red dye) 2.7.104 The composition thus obtained consists of a biphasic solution containing color droplets orange transparent and crystalline in suspension in a perfectly clear liquid pink. The droplets are distributed at the bottom of the vial comprising the composition, their size being 1 to 5 r-. After a moderate manual shaking of 5 seconds, the two-color orange / pink composition easily homogenizes into a "pink apricot" solution and can be uniformly sprayed eg with a standard pump bottle. The result on the skin is a scented fluid deposit, fresh on application and after drying a silky effect on the skin. Once the bottle is rested, the original distribution in two phases of the composition is made after 5 minutes. After 2 months, the appearance and organoleptic qualities of the product are unchanged, both at room temperature and at 37 ° C. There is also a complete absence of particle deposition in the bottom of the container after 2 months, both at room temperature and at 45 ° C. Example 2: Stable composition with 2% perfume% by weight relative to the Compound total weight of the composition Water 1 CaCl2 0.5 PEG 80E 2 Silica ** 0.5 Hydrogenated Isoparaffin 15 Perfume * 2 ETHYLHEXYL METHOXYCINNAMATE (and) ETHYLHEXYL SALICYLATE (and) BUTYL 1.5 METHOXYDIBENZOYLMETHANE (COVABSORB t Sensient) fat soluble organic UV filter BHT (butvl hydroxytoluene) 0.04 D & C Red 33 4.10-5 Ethanol Qs 100 * the perfume used contains 40% hedione, 15% Geraniol, 22% linalyl acetate, 2% vanillin ethyl, 1% Ambrox DL, 10% rose petrol, 5% Cital and 5% Patchoulol. The difference in density between the two phases of the composition is 0.00033. The composition thus obtained consists of a biphasic solution containing colorless and perfectly transparent droplets suspended in a perfectly clear liquid of pink color. The droplets are distributed at the bottom and at the top of the bottle comprising the composition, their size, being heterogeneous, being from 0.5 to 10 mm. After moderate manual shaking for 5 seconds, the composition easily homogenizes to a uniform solution and can be vaporized-for example, using a standard pump bottle. The result on the skin is a scented fluid deposit, fresh on application and after drying of silky effect on the skin. Once the bottle is rested, the original distribution in two phases of the composition is made after 5 minutes. After 2 months, the appearance and organoleptic qualities of the product are unchanged, both at room temperature and at 37 ° C.

Claims (15)

REVENDICATIONS1. A liquid composition in the form of an oil-in-water emulsion, comprising in a cosmetically acceptable medium: (i) a dispersed oily phase comprising at least one apolar hydrocarbon oil; (ii) a continuous aqueous phase comprising at least one C 1 -C 4 monoalcohol and (iii) hydrophobic silica airgel particles. 2. Composition according to claim 1, wherein the hydrophobic airgel particles have a specific surface per unit mass (SM) ranging from 500 to 1500 m2 / g, preferably from 600 to 1200 m2 / g and better still from 600 to 800. m2 / g, and a size expressed in mean diameter (D [0.5]) ranging from 1 to 30 mt and / or an oil absorption capacity measured at WET POINT ranging from 5 to 18 mllg of particles, preferably 6 to 15 ml / g and more preferably 8 to 12 ml / g. 3. Composition according to claim 1 or 2, characterized in that the hydrophobic silica airgel particles have a size expressed in average diameter ranging from 5 to 25 μm, better still from 5 to 20 μm and more preferably from 5 to 15 μm. pm 4. Composition according to one of claims 1 to 3, wherein the hydrophobic silica airgel particles are trimethylsiloxylated silica particles. 5. Composition according to any one of claims 1 to 4, characterized in that the hydrophobic silica airgel particles have a packed density p ranging from 0.04 g / cm3 to 0.10 g / cm3, preferably from 0.05 g / cm3 to 0.08 g / cm3. 6. Composition according to any one of claims 1 to 5, characterized in that the hydrophobic silica airgel particles have a specific surface area per volume unit SV ranging from 5 to 60 m2 / cm3, preferably from 10 to 50 m2 / cm3 and better from 15 to 40 30 m2 / cm3 7. Composition according to any one of the preceding claims, characterized in that it comprises at least one cosmetic agent chosen from perfumes, active agents for the care and / or treatment of the skin and the active ingredients for the care and / or or the hair treatment. 8. Composition according to any one of the preceding claims, characterized in that it comprises in addition at least 1% by weight relative to the total weight of the composition of at least one perfuming substance and at least one polyalkylene glycol, preferably of formula (I) below: H- [O-R -] .- OH (I), with - R represents a linear alkyl chain having 1 to 4 carbon atoms, and n is an integer ranging from 4 to 200 , advantageously from 4 to. 40, preferably from 4 to 20, preferentially from 6 to 10. 9. Composition according to any one of the preceding claims, wherein the polyalkylene glycol (s) is (are) preferably present in the composition in concentrations ranging from 0.1% to 3%, more preferably from 0.5% to 2%. by weight relative to the total weight of the composition. 10. Composition according to any one of the preceding claims, characterized in that the apolar hydrocarbon oil is chosen from linear or branched hydrocarbons of mineral or synthetic origin, in particular chosen from a liquid paraffin oil, volatile or nonvolatile, hydrogenated isoparaffin, naphthalene oil, a totally or partially hydrogenated liquid polydecene, isoeicosane, a decene / butene copolymer, or a polybutene / polyisobutene copolymer and mixtures thereof. 11. Composition according to any one of the preceding claims, characterized in that said mono-C 1 -C 4 alcohol is selected from linear hydroxy-C 1 -C 4, preferably ethanol. 12. Composition according to any one of the preceding claims, characterized in that it comprises a water-soluble metal salt. 13. Composition according to any one of the preceding claims, characterized in that the absolute value of the difference in density (M) between the dispersed oily phase and the continuous aqueous phase is at most 0.05, advantageously from plus 0.01. 14. Process for perfuming human keratin materials and / or a garment in contact with said keratin materials, comprising applying to said keratin materials and / or said garment a composition according to any one of the preceding claims. 15. A process for the cosmetic treatment and / or cosmetic care of human keratin materials, comprising the application to said keratin materials of a composition according to any one of claims 1 to 13.