FR3042407A1 - COMPOSITION COMPRISING A FLOWING EFFECT LOAD, BORON NITRIDE PARTICLES AND A COMPOSITE PIGMENT BASED ON NON-SPHERIC ALUMINA AND METAL OXIDE - Google Patents

Abstract

The present invention relates to a composition, in particular comprising a physiologically acceptable medium, in particular for coating keratin materials, more particularly for makeup and / or care of keratin materials, comprising: a) at least one blooming filler different from the nitride of boron and b) at least one composite pigment comprising at least one non-spherical aluminum oxide, at least one metal oxide and at least one surface treatment agent; and c) particles of boron nitride. The invention also relates to a process for coating keratin materials, more particularly makeup and / or care of keratin materials, such as the skin, characterized in that it comprises the application to keratin materials of a composition such as as previously defined

Description

COMPOSITION COMPRISING A FLOWING EFFECT LOAD, BORON NITRIDE PARTICLES AND A COMPOSITE PIGMENT BASED ON NON-SPHERIC ALUMINA AND METAL OXIDE

The present invention relates to a composition, in particular comprising a physiologically acceptable medium, in particular for coating keratin materials, more particularly for makeup and / or care of keratin materials, comprising: a) at least one blooming filler different from the nitride of boron and b) at least one composite pigment comprising at least one non-spherical aluminum oxide, at least one metal oxide and at least one surface treatment agent; and c) particles of boron nitride. The invention also relates to a process for coating keratin materials, more particularly makeup and / or care of keratin materials, such as the skin, characterized in that it comprises the application to keratin materials of a composition such as as previously defined

The skin is not a smooth and solid surface and has reliefs and microreliefs such as pores, fine lines, wrinkles, pimples, scars, dry areas, which form a somewhat bumpy surface. Quite often, this surface, with its irregularities, forms a very pleasant to look at but the irregularities are such that sometimes the surface is judged unsightly.

Cosmetic make-up and / or care compositions are commonly used to camouflage, smooth and / or unify imperfections of the relief of the skin such as pores, wrinkles and / or fine lines and / or scars. In this regard, many formulations, solid or fluid, anhydrous or not, have so far been developed. The application of a make-up composition such as a foundation is the most effective approach to beautify an irregular skin by allowing to hide stains and dyschromias, to reduce the visibility of relief imperfections such as pores and pores. wrinkles, and hide pimples and traces of acne, in this respect coverage is one of the main properties sought. Metal oxide pigments such as iron oxides and titanium oxides which can be modified with a surface-treating agent are generally used in these compositions. However, they are opaque, tend to accumulate in reliefs such as pores and wrinkles, to create a contrast of opacity and color and to mark these imperfections of relief.

To mitigate this phenomenon of marking embossed imperfections, it has been proposed to associate with the metal oxide pigments blooming fillers also known as "soft focus loads" or "fuzzy charges". compositions containing this combination do not make it possible to reduce this marking in a fully satisfactory manner. In addition, the use of bloating agents in excessive amounts tends to produce powdered and drying compositions for the skin.

In addition to the marking problem, compositions with high levels of metal oxide pigments tend to produce a sensation of thickness, unnatural mask on keratin materials such as the skin. Makeup compositions such as foundations containing a lower level of metal oxide pigments provide less opacity and "mask" effect and give the skin a more natural effect. Nevertheless, they do not make it possible to obtain a very good homogenization of the complexion because of their lower opacity.

There remains therefore a need to find new cosmetic compositions based on metal oxide pigments to effectively smooth and hide skin imperfections, substantially reduce or even eliminate the effects of marking reliefs and masking effect on the skin. keratin materials such as skin and get a good homogenization of the complexion and a more natural look.

In the course of its research, the Applicant has surprisingly discovered that this objective could be achieved with a composition comprising: a) at least one blooming filler different from boron nitride and b) at least one composite pigment comprising at least one non-spherical aluminum oxide, at least one metal oxide and at least one surface treatment agent; and c) particles of boron nitride.

This discovery is the basis of the invention.

The present invention relates to a composition, in particular comprising a physiologically acceptable medium, in particular for coating keratin materials, more particularly for makeup and / or care of keratin materials, comprising: a) at least one blooming filler different from the nitride of boron and b) at least one composite pigment comprising at least one non-spherical aluminum oxide, at least one metal oxide and at least one surface treatment agent; and c) particles of boron nitride. The invention also relates to a process for coating keratin materials, more particularly makeup and / or care of keratin materials, such as the skin, characterized in that it comprises the application to keratin materials of a composition such as as defined previously Definitions

In the context of the present invention, the term "keratin materials" is understood to mean the skin and more particularly the areas such as the face, the cheeks, the hands, the body, the legs and the thighs, the contour of the eyes, the eyelids.

By "physiologically acceptable" is meant compatible with the skin and / or its integuments, which has a pleasant color, smell and feel and which does not generate unacceptable discomfort (tingling, tightness) likely to divert the consumer from use this composition.

By "charge" is meant colorless or white, solid particles of all shapes, which are in an insoluble form and dispersed in the medium of the composition.

In the context of the present invention, the expression "blooming effect" designates a fuzzy effect that camouflages the micro-reliefs of the skin. This effect makes it possible in particular to attenuate by optical effect skin defects such as spots, wrinkles or fine lines.

These bloomers may also be called "soft focus charges" or "blur charges".

The term "pigments" means white or colored particles, mineral or organic, insoluble in an aqueous medium, intended to color and / or opacify the composition and / or the resulting film. These pigments may be white or colored, mineral and / or organic.

By "composite pigment" is meant any pigment comprising at least two materials of different chemical structure. In the context of the present invention, the composite pigment comprises at least one metal oxide and at least one composite pigment comprising at least one non-spherical aluminum oxide (alumina) which are different from one another and at least one surface treatment agent.

By "surface treatment agent" is meant any chemical compound capable of blocking, adhering, covalently, physically or ionically binding partially or totally on the surface of the metal oxide (s) and / or the non-spherical alumina constituting the composite pigment of the invention.

LOAD EFFECTS

As stated above, the claimed compositions comprise at least one blooming filler different from boron nitride and especially as detailed below.

This type of load is particularly advantageous insofar as it allows to blur imperfections. As indicated above, the performance of these charges is advantageously increased thanks to their implementation in a composition according to the invention. The blur effect is characterized by Haze and transparency (TH transmission) measurements in a white reference base defined below. The "Haze" corresponds to the percentage of scattered light relative to the total transmittance according to ASTM Standard 1003 (Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics).

25 μm films of composition are applied to 50 μm polyethylene (PE) films. The film is then measured after one hour of drying at ambient temperature (25 ° C.). Finally, the film is placed in the camera and transparency and Haze measurements are made.

The bloomer charge (s) other (s) than the hydrophobic silica aerogels is (are) introduced in an amount of 12% by weight relative to the total weight of the white base described below:

In the particular case where the filler is a hydrophobic silica airgel, the amount introduced into the white base is 4% by weight relative to the total weight of the white base described below:

In particular, the blooming fillers or fillers in the white base are (are) characterized in that the Haze is greater than 60% and the TH transmission is greater than 60%, and more preferably, the Haze is greater than 60%. at 70% and the TH transmission is greater than 70% according to ASTM D 1003 (Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics).

Of course, as indicated below, the compositions according to the invention may in parallel also contain conventional additional charges, it being understood that those skilled in the art will take care not to choose fillers whose nature or quantity in the composition would impact the blooming effect brought by the bloomers.

For the purposes of the present invention, the term "charges" is understood to mean colorless or white, solid particles of any shape, of a mineral nature, or

organic, natural or synthetic, which are in an insoluble form and dispersed in the middle of the composition.

The blooming fillers that can be used in the composition according to the invention are characterized in particular by a refractive index of between 1.33 and 2. The refractive index is measured according to a conventional method under normal conditions. temperature (25 ° C) and atmospheric pressure (760 mmHg).

They will generally comprise or consist of particles having an average size less than or equal to 25 pm, in particular less than or equal to 20 pm, in particular less than or equal to 15 pm.

Particle size and size distributions are measured at 25 ° C by static light scattering using a particle size analyzer such as Mastersizer 2000 from Malvern. The light intensity scattered by the particles as a function of the angle at which they are illuminated is converted into a size distribution according to Mie's theory. This theory, which is accurate for isotropic particles, also makes it possible to determine, for non-spherical particles, an "effective" particle diameter. This theory is particularly described in the De Van de Hulst publication, HC, Light Scattering by Small Particles, Chapters 9 and 10, Wiley, New York, 1957. The particle size can be determined by the values D [10], D [ 50] and D [90], D [10] represents the maximum size of 10% by volume of the particles. D [50] represents the maximum size of 50% by volume of the particles. D [90] represents the maximum size of 90% by volume of the particles.

These particles can be of any shape and in particular be spherical or nonspherical.

In particular, the blooming filler is chosen from polytetrafluoroethylene powders, polyurethane powders, carnauba microwaxes, synthetic wax microwaxes, silicone resin powders, hollow hemispherical silicone particles, copolymer powders. acrylics, expanded vinylidene / acrylonitrile / methylene methacrylate microspheres, polyethylene powders, in particular comprising at least one ethylene / acrylic acid copolymer, polymethyl methacrylate powders, crosslinked elastomeric organopolysiloxane powders, organopolysiloxane powders, crosslinked elastomeric coated with silicone resin, starch powders, polyamide powders, silica powders and silicates, in particular alumina, hydrophobic silica airgel particles, talc of average size in a number less than or equal to at 3 microns, the silica / TiO 2 composites, the particles of barium sulphate, surface-treated silica particles with mineral wax, amorphous silica microspheres, silica micro-beads, talc / TiO2 / alumina / silica composite powders, silicone elastomers, spherical cellulose, and mixtures thereof.

More particularly, the blooming filler is selected from the group consisting of polytetrafluoroethylene powders, polyurethane powders, carnauba microwaxes, synthetic wax microwaxes, silicone resin powders, hollow hemispherical silicone particles, acrylic copolymer powders, expanded vinylidene / acrylonitrile / methylene methacrylate microspheres, polyethylene powders, in particular comprising at least one ethylene / acrylic acid copolymer, polymethyl methacrylate powders, starch powders, polyamide, silica powders and silicates, in particular alumina, hydrophobic silica airgel particles, talc of average size less than or equal to 3 microns, silica / TiO 2 composites, particles of barium sulphate, silica particles surface-treated with a mineral wax, amorphous silica microspheres, silica micro-beads, talc / TiCValumine / silica composite powders, spherical cellulose beads, and mixtures thereof.

According to one preferred embodiment, the composition comprises at least one blooming filler selected from polymethyl methacrylate (solid or shell core) powders, talc / TiCValumine / silica composite powders, silica / TiO 2 composite powders, hollow hemispherical silicone particles, crosslinked elastomeric organopolysiloxane powders, crosslinked elastomeric organopolysiloxane powders coated with silicone resin, starch powders, polyamide powders, spherical cellulose beads, and mixtures thereof.

According to another preferred embodiment, the composition comprises at least one soft-blooming filler selected from the group consisting of acrylic copolymer powders, polymethyl methacrylate powders (solid or core shell microspheres), talc composite powders. / TiCValumine / silica, silica / TiO2 composite powders, hollow hemispherical silicone particles, starch powders, polyamide powders, spherical cellulose beads, and mixtures thereof.

As blooming fillers usable according to the invention, mention may be made in particular of: talc / TiCValumine / silica composite powders, for instance those sold under the name Coverleaf AR-80® by the company Catalyst & Chemicals silica / TiO 2 composites, such as those sold by Sunjin Chemical under the name Sunsil Tin 50; powders of acrylic copolymers, in particular of methyl poly (meth) acrylate, such as, for example, the PMMA Jurimer MBI® particles of Nihon Junyoki with an average size of 8 μm, and the hollow PMMA spheres sold under the name Covabeads LH85® by the Sensient Cosmetic Technologies, PMMA Ganzpearl GMP0820® particles from Ganz Chemical, and expanded vinylidene / acrylonitrile / methylene methacrylate microspheres sold under the name Expancel®; hollow spheres of copolymer acrylates / ethylhexyl and acrylate crosspolymer, such as those sold by the company Daito Kasei Kogyo under the name Maquibeads SP-10; microspheres of acrylate / ethylhexylacrylate copolymers, such as those sold by Serisui Plastics under the name Techpolymer ACP-8C; the hollow hemispherical silicone particles of INCI 'methylsilanol / silicate crosspolymer' name as described in applications JP-2003 128 788 and JP-A-2000-191789, for example NLK 500®, NLK 506® and NLK 510® from Takemoto Oil and Fat; hydrophobic silica aerogel particles (INCI name: silica silylate), such as those marketed by Dow Corning under the name Dow Corning VM-2270 Aerogel Fine Particles; elastomeric organopolysiloxane crosslinked powders, such as Dow Corning 9701 Cosmetic Powder® from Dow Corning (INCI name 'dimethicone / vinyl dimethicone crosspolymer'); or those marketed by the company Dow Corning under the name EP-9801 Hydrocosmetic Powder (INCI name "Dimethicone / Vinyl dimethicone crosspolymer (and) Butylene glycol"; -powders of crosslinked elastomeric organopolysiloxane coated with silicone resin, in particular of silsesquioxane resin as described, for example, in US Pat. No. 5,538,793. Such elastomer powders are sold under the names KSP-100®, KSP-101®, KSP-102®, KSP-103®, KSP-104® and KSP. -105® by the company Shin Etsu, or those of INCI name "vinyl dimethicone / methicone silsesquioxane crosspolymer treated with PEG-7 glyceryl cocoate, Polyquaternium-7 and methylsilanol tri-PEG-8 glyceryl cocoate" marketed by the company Miyoshi Kasei under the denomination MW-SRP-100; starch powders, in particular aluminum starch octenylsuccinate, such as that marketed by Akzo Nobel under the name Dry Flo Plus; polyamide udders, such as Nylon® 12 powder, in particular that sold under the name Orgasol 2002 Extra D Nat Cos® by the company Atochem; spherical cellulose beads, such as those marketed by the company Daito Kasei under the name Cellulobeads USF; - and their mixtures.

According to one particular embodiment, the bloomer fillers used according to the invention are chosen from: talc / TiCValumine / silica composite powders, for example those sold under the name Coverleaf AR-80® by the company Catalyst &; Chemicals acrylic copolymer powders, in particular the hollow spheres of copolymer Acrylates / Ethylhexyl & Acrylate Crosspolymer, such as those marketed by the company Daito Kasei Kogyo under the name Maquibeads SP-10; the hollow hemispherical silicone particles, of the INCI 'Methylesilanol / silicate Crosspolymer' name as described in applications JP-2003 128 788 and JP-A-2000-191789, for example NLK 506® from Takemoto Oil and Fat; elastomeric organopolysiloxane crosslinked powders, such as those sold by the company Dow Corning under the name EP-9801 Hydrocosmetic Powder (INCI name "Dimethicone / Vinyl dimethicone crosspolymer (and) Butylene glycol"; -the crosslinked elastomeric organopolysiloxane powders) coated with silicone resin, in particular silsesquioxane resin, such as those sold under the names KSP-100®, KSP-101®, KSP-102®, KSP-103®, KSP-104® and KSP-105® by the company Shin Etsu or INCI name "vinyl dimethicone / methicone silsesquioxane crosspolymer treated with PEG-7 glyceryl cocoate, Polyquaternium-7 and methylsilanol tri-PEG-8 glyceryl cocoate" marketed by Miyoshi Kasei under the name MW-SRP-100; and their mixtures.

According to a particularly preferred embodiment, the blooming fillers used according to the invention are chosen from acrylic copolymer powders, especially crosslinked copolymers of methyl methacrylate (INCI name: Methyl Methacrylate Crosspolymer) as the commercial product sold under the name COVABEAD LH 85® by the company Sensient Cosmetic Technologies, the hollow spheres of copolymer Acrylates / Ethylhexyl & Acrylate Crosspolymer, such as those sold by the company Daito Kasei Kogyo under the name Maquibeads SP-10 and mixtures thereof.

A composition according to the invention may comprise from 2% to 35% by weight, in particular from 3% to 30% by weight, and more particularly from 4% to 25% by weight of filler (s) with a blooming effect, compared to total weight of said composition.

COMPOSITE PIGMENTS

As stated above, the compositions of the invention contain at least one composite pigment comprising at least one nonspherical aluminum oxide (or alumina), at least one metal oxide and at least one surface treatment agent.

"Non-spherical aluminum oxide" means a three-dimensional aluminum oxide (length, width, thickness or height) for which the ratio of the largest dimension to the smallest dimension is greater than 1.2. . The dimensions of the particles of the invention are evaluated by scanning electron microscopy and image analysis. They comprise parallelepipedal (rectangular or square surface), discoidal (circular surface) or ellipsoidal (oval surface) particles, characterized by three dimensions: a length, a width and a height. When the shape is circular, the length and width are identical and correspond to the diameter of a disc, while the height corresponds to the thickness of the disc. When the surface is oval, the length and the width respectively correspond to the major axis and the minor axis of an ellipse and the height corresponds to the thickness of the elliptical disk formed by the wafer. When it is a parallelepiped, the length and the width may be of identical or different dimensions: when they are of the same size, the shape of the surface of the parallelepiped is square; otherwise, the shape is rectangular. As for the height, it corresponds to the thickness of the parallelepiped.

Preferably, the aluminum oxide or alumina is in planar or platelet form. The length and width are generally larger than the thickness. The aluminum oxide will generally comprise or consist of particles having an average size of less than or equal to 25 μm, in particular less than or equal to 20 μm, in particular less than or equal to 15 μm.

Preferably, the thickness of the aluminum oxide is less than 0.5 μm. As examples of alumina particles that can be used in the composite pigments of the invention, mention may be made of those sold under the trade name ALUSION® by Advances Nanotechnology Limited.

According to the present invention, the composite pigment comprises at least one metal oxide and at least one aluminum oxide. They can be mixed together dry and surface treated to block, fix or glue together, either directly or indirectly, each being in the form of loose powder. In a particular embodiment, the metal oxide and the aluminum oxide substrate may each be combined with a liquid such as water to form a slurry, dispersion or solution, and then said sludges, dispersions or solutions may be mixed together. together. The resulting liquid mixtures can be filtered to form a composite pigment. The surface treatment agent of the composite pigments of the invention may be hydrophobic or hydrophilic.

The term "hydrophobic surface treatment agent" means any compound capable of rendering the composite pigments hydrophobic or more dispersible in an oily phase.

By "hydrophilic surface treatment agent" is meant any compound capable of rendering the composite pigments hydrophilic or more dispersible in an aqueous phase.

The surface of the particles may be covalently or ionically bonded to an organic molecule, a silicone molecule, or may be adsorbed to said treating agent, or the particle may be physically bonded to a layer of a material. The surface treatment agent may be attached to the particle by a coupling agent, a linking group or a functional group (silane, ether, ester, etc.). The hydrophobic surface-treating agent may comprise a hydrophobic portion that may be selected from alkyl, allyl, aryl, vinyl, alkyl-aryl, organosilicone, diorganosilicone, dimethicone, methicone, polyurethane, silicone-polyurethane and their fl uorinated or perfluorinated derivatives. Among the hydrophobic surface-treating agents, mention may also be made of lauroyl lysine, Isopropyl Titanium Trisostearate (ITT), ITT and Dimethicone Crosspolymer, ITT and amino acid, ITT / Triethoxycaprylylsilane Crosspolymer, waxes (carnauba wax), fatty acids ( stearic acid), HDI / Trimethylol Hexylactone Crosspolymer, PEG-8 Methyl Ether Triethoxysilane, Aloe, Jojoba Ester, Lecithin, Perfluoroalcohol Phosphate, Magnesium Stearate (MM).

Among these hydrophobic surface treatment agents, mention may be made, for example, of aluminum laurate, aluminum stearate, metal soaps such as magnesium myristate; amino acids such as lauroyl lysine, chitin, collagen, fluorinated compounds, natural waxes, polyacrylates, silicones such as dimethicone copolyols, dimethicones and meticones; silanes such as triethoxycaprylylsilane (or octyltriethoxysilane), trimethoxycaprylylsilane; titanates; urethanes, perfluoropolymethylisopropyl ethers, styrene / acrylate copolymers and mixtures thereof. Preferably, use a surface treatment agent selected from methicones, silanes, dimethone copolyols and mixtures thereof. The surface treatment agent of the composite pigments of the invention may be hydrophilic such as those described for example in Cosmetics & Toiletries, February 1990, Vol. 105, p 53-64. There may be mentioned, for example, amino acids, C1-C5 alkanolamines, silicon oxides (silica), sodium hexametaphosphate or glycerol or mixtures thereof, PEG-12 dimethicone, sodium glycerophosphate, PEG-7 glyceryl cocoate + methylsilanol Tri-PEG-8 Glyceryl Cocoate + Polyquaternium-7, Chitosan, Methoxy PEG-10 propyltrimethoxysilane, PEG / PPG-18/18 DIMETHICONE, microcrystalline cellulose, alkoxysilane polyethyllene glycols.

Alkylsilane, preferably a C 1 -C 20 -alkylsilane, more preferably a C 1 -C 12 alkylsilane, and even more preferably a (C 1 -C 4) alkoxy (C 1 -C 12) alkylsilane, for example, may be used as surface treatment agent. octyltriethoxysilane (INCI name Triethoxycaprylylsilane).

In a particular embodiment, the surface treatment agent fixes the metal oxide and the non-spherical alumina substrate either directly or indirectly. The metal oxide is attached to said substrate by adhesive forces between the treating agent and the alumina and between the treating agent and the metal oxide. In particular, the adhesive forces maintain the metal oxide and alumina, each in free powder form. The surface-treating agent is preferably present in a proportion of at least 0.50% by weight, in particular at least 0.75% by weight and more particularly at least 1% by weight relative to the weight of the composite pigment. According to one particular embodiment, in a proportion of less than 30%, in particular less than 25% by weight, more particularly less than 20% by weight relative to the weight of the composite pigment.

According to one particular form of the invention, the composite pigment may also comprise, in addition, silica particles. the composite pigment comprises the alumina substrate, partially coated with the metal oxide.

According to one particular form of the invention, the alumina substrate in platelet form comprises an upper surface and a lower surface which are separated by a border and the metal oxide randomly covers said surfaces but the border is substantially free of metal oxide. .

The term "substantially metal oxide-free rim" means that at least 90% of the rim surface of the nonspherical transparent substrate, particularly alumina, does not include a metal oxide attached thereto.

According to one particular form of the invention, 5 to 99% of the surface of the alumina substrate is covered by the metal oxide of the composite pigment.

The metal oxides that can be used in the composite pigments of the invention are preferably chosen from titanium oxides, iron oxides that are yellow, red, brown, amber or black.

According to one particular form of the invention, the metal oxide (s) are present in an amount ranging from 25% to 85% and preferably from 30% to 75% by weight relative to the total weight of the composite pigment.

According to one particular form of the invention, the metal oxide (s) are present in an amount ranging from 30% to 75% by weight relative to the total weight of the composite pigment.

According to one particular form, the composite pigment is chosen from (i) a pigment comprising at least one titanium oxide, a platelet alumina and an alkylsilane, in particular a C 1 -C 20 -alkylsilane, more preferentially a C 12 -C 12 alkylsilane, and even more particularly a tri (Ci-C4) alkoxy (Cl-

C12) alkylsilane such as octyltriethoxysilane (INCI name: Triethoxycaprylylsilane); (ii) a pigment comprising an iron oxide, a platelet alumina and an alkylsilane, in particular a C 1 -C 20 alkylsilane, more preferably a C 1 -C 4 alkylsilane, and even more particularly a (C 1 -C 4) alkoxy (C 1 -C 4)

C12) alkylsilane such as octyltriethoxysilane (INCI name: Triethoxycaprylylsilane); (iii) their mixtures.

Among the composite pigments that can be used according to the invention, mention may be made of those sold under the trade name Covalumine® by SENSIENT, such as: COVALUMINE SONOMA RED AS® (INCI name: ALUMINA (and) Cl 77491 (and) TRIETHOXYCAPRYLYLSILANE) COVALUMINE SONOMA YELLOW AS ® (INCI name: ALUMINA (and) Cl 77492 (and) TRIETHOXYCAPRYLYLSILANE) - COVALUMIN SONOMA BLACK AS® (INCI name: ALUMINA (and) Cl 77499 (and) TRIETHOXYCAPRYLYLSILANE (and) SILICA). - COVALUMINE ATLAS WHITE AS® (INCI name: ALUMINA (and) TITANIIUM OXIDE (and) TRIETHOXYCAPRYLYLSILANE).

The composite pigments according to the invention may be prepared according to one of the processes described in patent US7964178.

They may in particular be prepared according to a process comprising the following steps: a) the metal oxide (s) and the alumina substrate, in particular alumina, are dry-blended at room temperature (20-25 ° C.) and normal pressure (1 atmosphere); ) to form a dry mixture; b) adding the surface treatment agent to form a mixture; c) mixing at room temperature (20-25 ° C) and normal pressure (1 atmosphere).

According to a particular mode, steps 1 and 2 can be performed simultaneously. In other words, the metal oxide or oxides, the alumina substrate and the surface treatment agent can be combined in the first step and then mixed together.

In step 2, the surface treatment agent may be added to substantially fix or bond the one or more metal oxides to the alumina therebetween.

In step 3, the mixture can be stirred for at least 30 seconds, in particular at least 5 minutes and more particularly at least 12 minutes. According to a particular embodiment, the stirring can last less than 30 minutes, preferably less than 25 minutes. minutes, more particularly less than 20 minutes.

In a particular embodiment, the metal oxide (s) and / or the surface treatment agent may be hydrated. Water can also be added to the dry mix and / or the final mix.

In a particular embodiment, the final mixture comprising water can be dried after stirring at room temperature and normal pressure. It may also be dried by heating in an oven at a temperature of at least 70 ° C, preferably at least 75 ° C, more preferably at least 80 ° C. According to one particular embodiment, the final mixture may be heated to a temperature of less than 110 ° C., preferably less than 100 ° C., in particular less than 95 ° C., more particularly less than 90 ° C. The heating time can vary from 1 to 2 hours. According to a particular mode for a period of less than 48 hours, preferably less than 36 hours and more particularly less than 18 hours.

The composite pigment (s) in accordance with the invention are preferably present in concentrations ranging from 0.01 to 80% by weight and more preferably from 1.5 to 70% by weight relative to the total weight of the composition.

According to one particular form of the invention, the weight ratio of the composite pigment to the blooming agent varies from 0.01 to 4, and preferably from 0.7 to 1.5.

According to a particular form, the composition according to the invention comprises: a) at least one filler with a pilling effect chosen from acrylic copolymer powders, especially crosslinked copolymers of methyl methacrylate, hollow spheres of copolymer Acrylates / Ethylhexyl & Acrylate Crosspolymer and mixtures thereof, and b) at least one composite pigment comprising an iron oxide, a platelet alumina and a (C1-C4) alkoxy (C1-C12) alkylsilane trialkyl, in particular octyltriethoxysilane and / or a composite pigment comprising a titanium oxide, a platelet alumina and a (C 1 -C 4) -alkoxy (C 1 -C 12) alkylsilane, in particular octyltriethoxysilane as defined above; c) boron nitride.

PROPERTIES OF COVERAGE / OPACITY

According to one particular embodiment, the compositions of the invention have a coverage characterized by a Contrast Ratio (CR) preferably ranging from 16 to 80 and more preferably from 20 to 79%.

The coverage is measured according to the following protocol:

Measure Coverage The application can be performed with an automatic spreader.

The Contrast Ratio of the first and second compositions is evaluated by preparing a 25 μm film on a contrast card (type BYK Chart PA-2814) showing a white part and a black part using an automatic spreader.

It is left to dry for 1 hour at room temperature: (20-25 ° C.)

Color measurements were made using a spectrocolorimeter, a Minolta CM600d. The colorimeter provides the numerical data representing the absolute value and the color difference between a reference sample and a sample to be tested. We use in our study the absolute values of each film sample on the white background for the color by integrating the black background for the calculation of the coverage.

The operating conditions are as follows:

CIE standard observer 1964 10 °

Illuminant CIE type D65 Measuring geometry: Diffuse / 80 measurement geometry and observation D65 / 100, specular component mode included (SCI), average aperture (10mm) on black and white backgrounds. The apparatus is provided with an optical device producing a diffuse light, placed in a spherical cavity coated with a white layer which induces a multiple reflection of the light. An anti-gloss trap can eliminate the effects of gloss on the surface of the sample.

The spectra are expressed in colorimetric coordinates in the CIELab76 space within the meaning of the International Commission on Illumination according to Recommendation 15: 2004.

The contrast ratio is calculated by averaging the Y values on a black background, divided by the Y average on a white background, multiplied by 100.

BORON NITRIDE

There are several polymorphic forms of boron nitride: boron nitrides of hexagonal form (denoted h-BN), rhombohedral boron nitrides (denoted r-BN), amorphous boron nitrides (denoted a-BN ), turbostratic boron nitrides (denoted t-BN), cubic boron nitrides (denoted c-BN) and wurtzite-type hexagonal boron nitrides (denoted w-BN).

Preferably, the boron nitride particles in accordance with the invention are chosen from turbostratic boron nitride particles, that is to say whose crystallization planes may be slightly offset with respect to the theoretical crystallization position. Turbostratic boron build is a precursor of hexagonal boron nitride (h-BN). It has the same type of characteristics and physical properties as exfoliated hexagonal boron nitride.

Preferably, the particles of boron nitride have an oxygen content ranging from 0.05 to 3% by weight, more preferably from 0.1 to 2.5% by weight relative to the total weight of the particle.

Preferably, the particles of boron nitride have an average particle size ranging from 0.1 to 25 μm and preferably from 0.3 to 15 μm.

The size of the particles is measured according to a method of diffraction laser distribution with a device of the MICROTRAC type of Nikkiso or

MASTERSIZER of Malvern, in particular by measuring the values D [10], D [50] and D [90], D [10] represents the maximum size that presents 10% by volume of the particles. D [50] represents the maximum size of 50% by volume of the particles. D [90] represents the maximum size of 90% by volume of the particles.

The boron nitride particles may be modified by a surface treatment agent to give them amphiphilic properties and promote their dispersibility in the compositions comprising an oily phase and / or an aqueous phase.

Among the treating agents, may be chosen from dimethylpolysiloxanes (Dilmethicone), linear siloxane polymers blocked at the end by Trimethoxysiloxy groups, polymethylhydrogenosiloxanes which are linear polysiloxanes called methicones, polyoxyalkylenated polyalkylethersiloxanes such as the polymer PEG-8 METHYL ETHER DIMETHICONE .

The particles of boron nitride according to the invention will be chosen more particularly from the following commercial products:

UHP-1010® from CARBORUNDUM PUHP 1030L® by SAINT GOBAIN CERAMICS, BORON NITRIDE POWDER VERY BN PUHP 3002® by SAINT GOBAIN CERAMICS, VERY BN PUHP 30005® by SAINT GOBAIN CERAMICS, LEAU3002® (name I NCI: BORON NITRIDE (and) PEG-8 METHYL ETHER DIMETHICONE by SAINT GOBAIN, RONAFLAIR BORONEIGE SF-3 117774® by MERCK, RONAFLAIR BORONEIGE SQ-6® from MERCK, SOFTOUCH BORON NITRIDE CC6059® by MOMENTIVE, SOFTOUCH BORON NITRIDE CC6097® by the company MOMENTIVE, SOFTOUCH CCS102J® by the company MOMENTIVE.

The boron nitride particles in accordance with the invention are preferably used in concentrations ranging from 0.1 to 20% by weight and preferably from 0.5 to 15% by weight relative to the weight of the composition.

COSMETIC COMPOSITIONS

According to one particular embodiment, the compositions of the invention comprise a physiologically acceptable medium.

By "physiologically acceptable" is meant compatible with the skin and / or its integuments, which has a pleasant color, smell and feel and which does not generate unacceptable discomfort (tingling, tightness, redness), which can divert the consumer to use this composition.

The composition used according to the invention may be in any galenical form normally used in the cosmetics field, and may especially be in the form of a suspension, dispersion, gel, serum, emulsion (W / O, O / W, multiple emulsion) fluid or solid, aqueous stick, anhydrous or fatty, liquid or pasty solid anhydrous product, free or compacted powder, cast, molded, extruded form.

In a particular embodiment, the composition is an emulsion.

In a particular embodiment, the composition is a gel.

In a particular embodiment, the composition is a solid anhydrous product.

According to a particular embodiment, the composition is a liquid anhydrous or pasty product.

According to a particular mode, the composition is a powder in free form or pressed.

According to a particular mode, the composition is a cast.

By "anhydrous" is meant that the composition used according to the invention has less than 5% by weight, in particular less than 3% by weight, more particularly less than 1% by weight of water or even is free from water.

The physiologically acceptable medium may also include, in particular, organic solvents, optionally water and / or oils, in particular for compositions in fluid or pasty form.

According to another variant of the invention, the composition of the invention comprises an aqueous phase.

The aqueous phase comprises at least water and may also comprise water-miscible organic solvents (at room temperature - 25 ° C.), for example monoalcohols having from 2 to 6 carbon atoms, such as ethanol, isopropanol; the polyols having in particular 2 to 20 carbon atoms, preferably having 2 to 10 carbon atoms, and preferably having 2 to 6 carbon atoms, such as glycerol, propylene glycol, butylene glycol, pentylene glycol hexylene glycol, caprylylglycol, dipropylene glycol, diethylene glycol; glycol ethers (having in particular from 3 to 16 carbon atoms) such as the mono, di or tripropylene glycol (C1-C4) alkyl ethers, the mono, di or triethylene glycol (C1-C4) alkyl ethers; , and their mixtures.

A water that is suitable for the invention may be a floral water such as cornflower water and / or mineral water such as VITTEL water, LUCAS water or LA ROCHE POSAY water and / or thermal water.

The overall aqueous phase, including all the hydrophilic substances of the composition capable of being solubilized in this same phase, is preferably present in the composition in a content, preferably ranging from 5% to 98% by weight, more preferably from 5% to 95% by weight, more preferably from 25% to 75% by weight, and more particularly from 25% to 60% by weight relative to the total weight of said composition.

The aqueous phase may also comprise any water-soluble or water-dispersible compound compatible with an aqueous phase such as gelling agents, film-forming polymers, thickeners, surfactants and mixtures thereof.

According to another variant of the invention, the composition of the invention comprises a liquid fatty phase. Said phase is liquid (in the absence of structuring agent) at ambient temperature (20-25 ° C.). Preferably, the immiscible organic liquid phase in water according to the invention generally comprises at least one volatile oil and / or a non-volatile oil.

By "oil" is meant a fatty substance that is liquid at ambient temperature (25 ° C.) and atmospheric pressure (760 mmHg, ie 105 Pa). The oil can be volatile or non-volatile.

For the purposes of the invention, the term "volatile oil" means an oil capable of evaporating on contact with the skin or keratin fiber in less than one hour at ambient temperature and atmospheric pressure. The volatile oils of the invention are volatile cosmetic oils which are liquid at ambient temperature and have a non-zero vapor pressure at ambient temperature and atmospheric pressure, in particular from 0.13 Pa to 40 000 Pa (10 -3 to 300 mmHg), in particular ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mmHg), and more particularly ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg). ).

By "non-volatile oil" is meant an oil remaining on the skin or the keratin fiber at room temperature and atmospheric pressure for at least several hours and having in particular a vapor pressure of less than 10 -3 mmHg (0.13 Pa). . The oil may be chosen from all the oils, which are preferably physiologically acceptable, in particular mineral, animal, vegetable and synthetic oils; in particular volatile and / or nonvolatile hydrocarbon and / or silicone and / or fluorinated oils and mixtures thereof.

More precisely, the term "hydrocarbon-based oil" means an oil comprising mainly carbon and hydrogen atoms and optionally one or more functional groups chosen from hydroxyl, ester, ether and carboxylic functions. Generally, the oil has a viscosity of 0.5 to 100,000 mPa.s, preferably 50 to 50,000 mPa.s and more preferably 100 to 300,000 mPa.s. By way of example of volatile oil that can be used in the invention, mention may be made of: volatile hydrocarbon oils chosen from hydrocarbon-based oils having from 8 to 16 carbon atoms, and in particular C 6 -C 16 isoalkanes of petroleum origin (Also called isoparaffins) such as isododecane (also called 2,2,4,4,6-pentamethylheptane), isodecane, isohexadecane, and for example the oils sold under the trade names of Isopars or permetyls, Ce-O16 branched esters, isohexyl neopentanoate, and mixtures thereof. Other volatile hydrocarbon oils such as petroleum distillates, especially those sold under the name Shell or by Shell, may also be used; volatile linear alkanes such as those described in the patent application by Cognis DE10 2008 012 457. volatile silicones, such as, for example, volatile linear or cyclic silicone oils, in particular those having a viscosity <8 centistokes (8 10 ') 6 m2 / s), and having in particular 2 to 7 silicon atoms, these silicones optionally comprising alkyl or alkoxy groups having from 1 to 10 carbon atoms. As volatile silicone oil that can be used in the invention, mention may be made especially of caprylyl methicone, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethyl disiloxane and octamethyl. trisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and mixtures thereof. As an example of a non-volatile oil that may be used in the invention, mention may be made of: hydrocarbon-based oils of animal origin, such as perhydrosqualene; hydrocarbon oils of vegetable origin, such as liquid triglycerides of fatty acids with 4 to 24 carbon atoms, such as triglycerides of caprylic / capric acids, such as those sold by Stearineries Dubois or those sold under the names Miglyol 810, 812 and 818 by Dynamit Nobel,; linear or branched hydrocarbons of mineral or synthetic origin, such as paraffin oils and their derivatives, petroleum jelly, polydecenes, polybutenes, hydrogenated polyisobutene such as Parleam or squalane; synthetic ethers having from 10 to 40 carbon atoms, such as dicapylyl ether; synthetic esters, especially of fatty acids, isononyl isononanoate, isopropyl myristate, isopropyl palmitate, C12-C15 alcohol benzoate, hexyl laurate, diisopropyl adipate, ethyl 2-hexyl palmitate, octyl 2-dodecyl stearate, octyl 2-dodecyl erucate, isostearyl isostearate, branched-chain and / or unsaturated carbon-chain liquid fatty alcohols having from 12 to 26 carbon atoms, such as octyl dodecanol, isostearyl alcohol, 2-butyloctanol, 2-hexyl decanol and 2-undecyl; pentadecanol, oleic alcohol; higher fatty acids such as oleic acid, linoleic acid, linolenic acid; carbonates, such as dicapryl carbonate; - acetates; - citrates; fluorinated oils which may be partially hydrocarbon-based and / or silicone-based, such as fluorosilicone oils, fluorinated polyethers or fluorinated silicones as described in document EP-A-847752; silicone oils, such as non-volatile polydimethylsiloxanes (PDMS); phenyl silicones such as phenyl trimethicones, phenyl dimethicones, phenyl trimethylsiloxy diphenyl siloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes, 2-phenylethyl trimethylsiloxysilicates, and mixtures thereof.

The oily phase may also comprise any liposoluble or lipodispersible compound compatible with an oily phase such as gelling agents, film-forming polymers, thickeners, waxes or pasty substances and mixtures thereof.

According to one particular form of the invention, the overall oily phase, including all the lipophilic substances of the composition capable of being solubilized in this same phase, represents from 5 to 95% by weight, and preferably from 10 to 80% by weight. weight relative to the total weight of the composition.

According to one particular embodiment, the compositions according to the invention may be in the form of an emulsion such as an oil-in-water emulsion (continuous aqueous phase in which an oily phase is dispersed in the form of droplets so as to obtain a mixture macroscopically homogeneous) or a water-in-oil emulsion (continuous oily phase in which is dispersed an aqueous phase in the form of droplets so as to obtain a macroscopically homogeneous mixture).

In the case where the composition is in emulsion form, it generally comprises one or more emulsifying surfactants, preferably nonionic surfactants.

The emulsifiers are suitably selected according to the emulsion to be obtained (W / O or O / W).

For the O / W emulsions, mention may be made, for example, as emulsifiers, of nonionic surfactants, and in particular saturated or unsaturated chain fatty acid and polyol esters containing, for example, from 8 to 24 carbon atoms and preferably from 12 to 24 carbon atoms. at 22 carbon atoms, and their oxyalkylenated derivatives, that is to say containing oxyethylenated and / or oxypropylene units, such as esters of glyceryl and of C 8 -C 24 fatty acid, and their oxyalkylenated derivatives; esters of polyethylene glycol and of C8-C24 fatty acid, and their oxyalkylenated derivatives; esters of sorbitol and of C8-C24 fatty acid, and their oxyalkylenated derivatives; and their oxyalkylenated derivatives; fatty alcohol ethers; esters of sugar and of C 8 -C 24 fatty acid, sugar ethers and C 8 -C 24 fatty alcohols, and mixtures thereof.

As glycerol ester and fatty acid, there may be mentioned glyceryl stearate (glyceryl mono-, di- and / or tri-stearate) (CTFA name: glyceryl stearate) or glyceryl ricinoleate, and mixtures thereof.

Examples of polyethylene glycol and fatty acid esters that may be mentioned include polyethylene glycol stearate (mono-, di- and / or tri-stearate of polyethylene glycol), and more especially polyethylene glycol 40 OE monostearate (CTFA name). PEG-40 stearate), polyethylene glycol 50 OE monostearate (CTFA name: PEG-50 stearate), polyethylene glycol 100 OE monostearate (CTFA name: PEG-100 stearate and mixtures thereof.

It is also possible to use mixtures of these surfactants, for example the product containing glyceryl stearate and PEG-100 stearate, sold under the name ARLACEL 165® by the company Uniqema, and the product containing glyceryl stearate (mono-distearate). glyceryl) and potassium stearate, sold under the name TEGIN® by the company Goldschmidt (CTFA name: glyceryl stearate SE).

As fatty alcohol ethers, mention may be made, for example, of ethers of polyethylene glycol and of fatty alcohol containing from 8 to 30 carbon atoms, and especially from 10 to 22 carbon atoms, such as ethers of polyethylene glycol and of Cetyl alcohol, stearyl alcohol, cetearyl alcohol (mixture of cetyl and stearyl alcohols). For example, ethers comprising from 1 to 200 and preferably from 2 to 100 oxyethylenated groups, such as CTFA Ceteareth-20, Ceteareth-30, and mixtures thereof, may be mentioned.

Mention may be made, by way of examples of mono or polyalkyl esters or sugar ethers, of the methylglucose isostearate sold under the name Isolan-IS® by the company Degussa Goldschmidt or the sucrose distearate sold under the name Crodesta F50® by the company. Croda, and the sucrose stearate marketed under the trademark Ryoto sugar ester S 1570® by Mitsubishi Kagaku Foods. ; sugar esters such as sucrose stearate; fatty alcohol and sugar ethers, especially alkylpolyglucosides (APG) such as decylglucoside and laurylglucoside sold, for example, by Henkel under the respective names Plantaren 2000® and Plantaren 1200®, cetostearylglucoside mixed with alcohol cetostearyl, marketed for example under the name Montanov 68® by the company Seppic, under the name Tegocare CG90® by the company Goldschmidt and under the name Emulgade KE3302® by Henkel, and arachidyl glucoside, for example in the form a mixture of arachidic and behenic alcohols and arachidylglucoside sold under the name Montanov 202® by the company Seppic.

As examples of W / O emulsifying surfactants, mention may be made of alkyl esters or ethers of sorbitan, glycerol, polyol, glycerol or sugars; silicone surfactants such as dimethicone copolyols such as that having the INCI name DIMETHICONE (and) PEG / PPG-18/18 DIMETHICONE sold under the trademark X-22-6711D® by the company Shin ETSU, the mixture of cyclomethicone and dimethicone copolyol sold under the name "DC 5225 C®" by Dow Corning, and alkyl-dimethicone copolyols such as Laurylmethicone copolyol sold under the name "Dow Corning 5200 Formulation Aid" by the company Dow Corning; Cetyl dimethicone copolyol such as CETYL PEG / PPG-10/1 DIMETHICONE such as the product sold under the name Abil EM 90® by the company Evonik Goldschmidt and the mixture of cetyl dimethicone copolyol, polyglycerol isostearate (4 moles) and hexyl laurate sold under the name ABIL WE 09® by the company Goldschmidt. One or more coemulsifiers may also be added, which advantageously may be selected from the group consisting of alkylated polyol esters.

Mention may also be made of non-silicone emulsifying surfactants, in particular alkyl esters or sorbitan, glycerol, polyol or sugar ethers.

Polyol alkyl esters that may especially be mentioned include polyethylene glycol esters such as PEG-30 dipolyhydroxystearate, such as the product marketed under the name Arlacel P135® by the company ICI.

Examples of glycerol and / or sorbitan esters that may be mentioned are polyglycerol isostearate (ie: Polyglyceryl-4 Isosteatare), such as the product sold under the name Isolan Gl 34® by the company Evonik Goldschmidt; sorbitan isostearate, such as the product sold under the name Arlacel 987® by the company ICI; sorbitan isostearate and glycerol, such as the product sold under the name Arlacel 986® by the company ICI, and mixtures thereof.

Mention may also be made of emulsifying polyoxyalkylenated elastomeric silicones, such as those mentioned in documents US-A-5,236,986, US-A-5,412,004, US-A-5,837,793 and US-A-5,811,487. These elastomeric silicones are preferably formulated in the form of a gel in a hydrocarbon oil and / or a silicone oil. In these gels, the polyoxyalkylenated elastomeric silicone is often in the form of spherical particles. Examples of polyoxyalkylene elastomer silicone include those sold by the company Shin ETSU with the following names: - KSG-21® (27% active ingredient) INCI name: Dimethicone / PEG-10 Dimethicone Vinyl Dimethicone crosspolymer - KSG-20® (95% by weight active ingredient) INCI name: PEG-10 Dimethicone Crosspolymer), - KSG-30® (100% active ingredient) INCI name: Lauryl PEG-15 Dimethicone Vinyl Dimethicone Crosspolymer), - KSG-31® (25% by weight active ingredient) INCI name: Lauryl PEG-15 Dimethicone Vinyl Dimethicone Crosspolymer), - KSG-32® or KSG-42 or KSG-320 or KSG- 30 (at 25% by weight of active ingredient) INCI name: Lauryl PEG-15 Dimethicone Vinyl Dimethicone Crosspolymer), - KSG-33® (at 20% active ingredient), - KSG-210® (at 25% by weight) active) INCI name: Dimethicone / PEG-10/15 Crosspolymer), - KSG-310®: lauryl polydimethylsiloxane polyoxyethylenated in mineral oil, - KSG-330®, - KSG-340®, - X-226146® (at 32% by weight of active ingredient) INCI name: Dimethicone / PEG-10 Dimethicone Vinyl Dimethicone Crosspolymer),

Mention may also be made of those sold by Dow Corning under the trade names: DC9010® (9% inactive material) of INCI name: PEG-12 Dimethicone Crosspolymer) - DC9011® at 11% of active ingredient.

Among the water / oil emulsifiers, mention may also be made of polyglycerolated elastomer silicones such as those described in document WO-A-2004/024798. As examples of elastomeric silicones, mention may be made of those sold by the company Shin Etsu, with the following trade names: - KSG-710® (25% active ingredient) with INCI name: Dimethicone / Polyglycerin-3 Crosspolymer), - KSG-810®, - KSG-820®, - KSG-830®, - KSG-840®,

More preferably, an emulsifier W / O chosen from Polyglyceryl-4 Isostearate, Cetyl PEG / PPG-10/1 Dimethicone, Dimethicone (and) PEG / PPG-18/18 Dimethicone, Dimethicone / PEG-10/15 Crosspolymer will be used more preferably. , Dimethicone / Polyglycerin-3 Crosspolymer and mixtures thereof.

According to one particular embodiment, the composition of the invention is a water-in-oil emulsion.

The compositions according to the invention may also contain additional cosmetic ingredients conventionally used for the formulation of particular galenics generally adjusted with respect to the targeted keratin material. This or these additional cosmetic ingredients may especially be chosen from waxes, pasty fatty substances, film-forming polymers, nonionic, anionic, cationic surfactants, hydrophilic or lipophilic gelling agents, dispersing agents, hydrophilic or lipophilic active agents, preservatives , antioxidants, solvents, perfumes, fillers other than the blooming fillers defined above, sunscreens, bactericides, odor absorbers, additional coloring materials other than the composite pigments defined above (ex: pigments , nacres, water-soluble or fat-soluble dyes), salts, and mixtures thereof.

Thus, a cosmetic composition of the invention may comprise, in addition to the blooming fillers or fillers, or the composite pigments as defined above, at least one additional cosmetic ingredient chosen from waxes, pasty fatty substances, film-forming polymers, nonionic, anionic, cationic surfactants, hydrophilic or lipophilic gelling agents, dispersing agents, hydrophilic or lipophilic active agents, preservatives, antioxidants, solvents, perfumes, fillers other than defined blooming fillers previously, sunscreens, bactericides, odor absorbers, additional dyestuffs other than the composite pigments defined above (eg pigments, pearlescent agents, water-soluble or fat-soluble dyes), salts, and mixtures thereof.

The amounts of additional cosmetic ingredients are those conventionally used in the field under consideration, and for example from 0.01 to 20% of the total weight of the composition, and preferably from 0.01 to 10% of the total weight of the composition.

Of course, those skilled in the art will take care to choose any additional ingredients and / or their quantity so that the advantageous properties of the composition according to the invention are not or substantially not impaired by the addition envisaged.

Dispersing agent

Advantageously, a composition according to the invention may further comprise a dispersing agent.

Such a dispersing agent may be a surfactant, an oligomer, a polymer or a mixture of several of them.

According to a particular embodiment, a dispersing agent according to the invention is a surfactant.

According to a particular embodiment variant, a composition according to the invention comprises less than 1% by weight of surfactant relative to the total weight of the composition, or is devoid of surfactant.

Active

For a particular care application, a composition according to the invention may comprise at least one moisturizing agent (also called humectant).

Preferably, the moisturizing agent is glycerin.

The moisturizing agent (s) may be present in the composition in a content ranging from 0.1% to 15% by weight, especially from 0.5% to 10% by weight, or even from 1% to 6% by weight, relative to to the total weight of said composition.

Other active agents which may be used in the composition of the invention include, for example, vitamins, sunscreens and mixtures thereof.

Preferably, a composition according to the invention comprises at least one active agent.

It is routine for those skilled in the art to adjust the nature and quantity of the additives present in the compositions according to the invention, so that the desired cosmetic properties thereof are not not affected.

According to one embodiment, a composition of the invention may advantageously be in the form of a skincare composition of the body or face, in particular the face, to homogenize the imperfections with a natural result.

According to another embodiment, a composition of the invention may advantageously be in the form of a makeup base composition.

According to another embodiment, a composition of the invention may advantageously be in the form of a foundation.

According to another embodiment, a composition of the invention may advantageously be in the form of a makeup product and / or care of the nails to camouflage and / or smooth the imperfections of relief and color.

According to one embodiment, a composition of the invention may advantageously be in the form of a make-up product for the eye area, dark circles, eyelids such as an eye shadow, a concealer product. It can be in the form of free or pressed powder, cream or gel.

According to one embodiment, a composition of the invention may advantageously be in the form of a make-up and / or lip care composition for camouflaging and / or smoothing the relief and color imperfections, especially in the form of rods. (sticks), of gloss.

Such compositions are especially prepared according to the general knowledge of those skilled in the art.

Expressions "understood" from ... to ... "must be understood as inclusive terms unless otherwise specified. The invention is illustrated in more detail by the examples and figures presented hereinafter. Unless otherwise indicated, the amounts indicated are expressed as a percentage by weight relative to the total weight of the composition.

Examples

Examples 1 to 3: Water-in-oil emulsions

Formulation 1 according to the invention was carried out as well as two other comparative compositions (Examples 2 and 3) with conventional pigments, a bland load and not containing boron nitride. The concentration of conventional pigments was chosen so as to obtain a contrast ratio equivalent to that of composition 1 (CR% ± 5) to be able to compare their smoothing and non-marking performance.

White base:

Protocol of Preparation a) Protocol for the preparation of the white base:

A1 was weighed into the main beaker, placed under stirring at room temperature. The demineralized water was boiled and B1 weighed in a beaker. It was placed on a magnetic plate with a magnetic bar. B1 was poured into A1 with vigorous stirring at 4500 rpm for 10 minutes. b) Protocol for the preparation of formulas example 1, 2 and 3:

E1 was added with gentle stirring. C1 was weighed and added to (White Base + E1) with stirring at room temperature at 4500 rpm for 10 minutes. D1 was added and allowed to stir for 2 minutes.

These formulas were evaluated by an expert beautician on a panel of 6 women. The beautician applies 0,10ml on half-face and evaluates the make-up after 4 minutes of drying.

The following criteria were evaluated on a scale of 0 to 36 Effects on wrinkles / fine lines Smoothing effects Dilated pores Correcting effects "colors"

Opacity (Coverage of the film)

Positive values indicate a decrease in the visibility of the parameter, while negative values indicate an increase in the visibility of the parameter. By way of example, the negative values for the effect on the relief indicate a marking of the relief and the positive values a smoothing effect.

The results obtained are shown in the following table:

Example 1 of the invention has shown better correction of color imperfections while having the same opacity as the two formulas with the pigments conventionally used in foundations. This homogenization without adding opacity makes it possible to achieve a natural homogenizing result. The combination of the invention has also made it possible to achieve dilated pore smoothing performances which are clearly superior to the other two formulas 2 and 3.

Claims (22)

A composition, in particular comprising a physiologically acceptable medium, comprising: a) at least one blooming filler other than boron nitride, and b) at least one composite pigment comprising at least one non-spherical aluminum oxide, at least a metal oxide and at least one surface treatment agent; and c) particles of boron nitride. 2. Composition according to claim 1, wherein the bloomer load is characterized in that the Haze is greater than 60% and the TH transmission greater than 60%, and preferably the Haze is greater than 70% and the TH transmission. greater than 70%. 3. Composition according to claims 1 or 2, wherein the bloomer load is characterized by a refractive index at 25 ° C between 1.33 and 2. 4. Composition according to any one of claims 1 to 3, wherein the blooming fillers or fillers are chosen from polytetrafluoroethylene powders, polyurethane powders, carnauba microwaxes, synthetic wax microwaxes, resin powders. of silicone, hollow hemispherical silicone particles, acrylic copolymer powders, expanded vinylidene / acrylonitrile / methylene methacrylate microspheres, polyethylene powders, in particular comprising at least one ethylene / acrylic acid copolymer, polymethyl methacrylate powders, , crosslinked elastomeric organopolysiloxane powders, crosslinked elastomeric organopolysiloxane powders coated with silicone resin, starch powders, polyamide powders, silica and silica powders, in particular alumina powders, airgel particles of hydrophobic silica, talc of lower average size or equal to 3 microns, the silica / TiO 2 composites, the barium sulfate particles, the silica particles treated on the surface with a mineral wax, the amorphous silica microspheres, the silica micro-beads, the talc / TiCValumin composite powders / silica, silicone elastomers, spherical cellulose beads, and mixtures thereof, and more particularly are chosen from acrylic copolymer powders, in particular crosslinked copolymers of methyl methacrylate, hollow spheres of Acrylates / Ethylhexyl copolymer &amp; Acrylate Crosspolymer. 5. A composition according to any one of claims 1 to 4, wherein the aluminum oxide is in the form of a planar particle or wafer form preferably having a mean diameter ranging from 1 to 20 μm and a thickness less than 0.5 pm. The composition of any one of claims 1 to 5, wherein the surface treatment agent is hydrophobic or hydrophilic. 7. A composition according to any one of claims 1 to 6, wherein the surface treatment agent is selected from amino acids, C1-C5 alkanolamines, silicon oxides, sodium hexametaphosphate or glycerin or their derivatives. mixtures, PEG-12 DIMETHICONE, Sodium Glycerophosphate, PEG-7 Glyceryl Cocoate + Methylsilanol Tri-PEG-8 Glyceryl Cocoate + Polyquaternium-7, Chitosan, Methoxy PEG-10 Propyltrimethoxysilane, PEG / PPG-18/18 DIMETHICONE, Microcrystalline cellulose, the alkoxysilanes polyethyllene glycols. 8. Composition according to any one of claims 1 to 7, wherein the surface treatment agent is an alkylsilane, preferably a C 1 -C 20 alkylsilane, more preferably a C 1 -C 12 alkylsilane, and even more particularly a tri (Ci -C4) alkoxy (C1-C12) alkylsilane such as octyltriethoxysilane. 9. A composition according to any one of claims 1 to 8, wherein the surface-treating agent is present in a proportion of at least 0.50% by weight, in particular at least 0.75% by weight. and more particularly at least 1% by weight relative to the weight of the composite pigment. 10. Composition according to any one of claims 1 to 9, wherein the surface treatment agent is present in a proportion of less than 30%, in particular less than 25% by weight, more particularly less than 20% by weight by weight. relative to the weight of the composite pigment. A composition according to any one of claims 1 to 10, wherein the alumina is in platelet form and comprises an upper surface and a lower surface which are separated by a border and the metal oxide randomly covers said surfaces but the border is substantially free of metal oxide. 12. A composition according to any one of claims 1 to 11, wherein 5 to 99% of the surface of the non-spherical alumina is covered by the metal oxide of the composite pigment. 13. Composition according to any one of claims 1 to 12, wherein the metal oxide is selected from titanium oxides and iron oxides yellow, red, brown, amber or black. 14. A composition according to any one of claims 1 to 13, wherein the metal oxide is present in an amount ranging from 25 to 85% by weight, preferably ranging from 30 to 75% by weight relative to the total weight of the pigment composite. 15. Composition according to any one of claims 1 to 7, 9 to 14, wherein the composite pigment is chosen from (i) a pigment comprising at least one titanium oxide, a platelet alumina and an alkylsilane, in particular a C 1 -C 20 -alkylsilane, more preferably a C 1 -C 4 alkylsilane, and even more particularly a (C 1 -C 4) alkoxy (C 1 -C 12) alkylsilane, such as octyltriethoxysilane; (ii) a pigment comprising an iron oxide, a platelet alumina and an alkylsilane, in particular a C 1 -C 20 alkylsilane, more preferably a C 1 -C 12 alkylsilane, and even more particularly a (C 1 -C 4) tri (C 1 -C 12) alkoxy; alkylsilane such as octyltriethoxysilane; (iii) their mixtures. 16. Composition according to any one of claims 1 to 15, wherein: the blooming fillers are present in concentrations ranging from 2% to 35% by weight, in particular from 3% to 30% by weight, and more particularly from 4 to 25% by weight of filler (s) with a blooming effect, relative to the total weight of said composition; the composite pigment is present in concentrations ranging from 0.01 to 80% by weight and more preferably from 1.5 to 70% by weight relative to the total weight of the composition; the particles of boron nitride are present in concentrations ranging from 0.1 to 20% by weight and preferably from 0.5 to 15% by weight relative to the weight of the composition. 17. Composition according to any one of claims 1 to 16, wherein the weight ratio of composite pigment / bloomer load varies from 0.01 to 4 and more preferably from 0.7 to 1.5. 18. Composition according to any one of claims 1 to 17, wherein the particles of boron nitride are turbostratic. 19. Composition according to any one of claims 1 to 18, wherein the particles of boron nitride have an oxygen content ranging from 0.05 to 3% by weight, more preferably from 0.1 to 2.5% by weight. weight relative to the total weight of the particle 20. Composition according to any one of claims 1 to 19, wherein the particles of boron nitride have an average size ranging from 0.1 to 25 pm and preferably from 0.3 to 15 pm. 21. Composition according to any one of claims 1 to 20, characterized in that it is an emulsion, preferably a water-in-oil emulsion or a water-in-oil emulsion, and more particularly a water-in-oil emulsion. in-oil. 22. Process for coating keratin materials, more particularly for making up and / or caring for keratinous substances, in particular the skin, characterized in that it comprises the application to keratin materials of a composition as defined in US Pat. any one of claims 1 to 21.