FR3114242A1 - Compact care and/or make-up powder - Google Patents

Abstract

The present invention relates to a solid cosmetic composition for caring for and/or making up keratin materials, in particular the skin, in the form of a compact powder comprising, in a physiologically acceptable medium: a solid phase comprising at least fillers and pigments treated with an alginate, said composition being obtainable by a process comprising the following steps: (i) mixing a liquid phase comprising at least water and the solid phase in powder form, to form a paste; and (ii) shaping of the paste by compacting and total or partial elimination of the liquid phase to obtain the composition in the form of a compact powder.

Description

Compact care and/or make-up powder

FIELD OF THE INVENTION

The present invention relates to the cosmetics field and in particular to the field of compact powders, particularly intended for cosmetic care and/or for making up the skin.

STATE OF THE ART

Compact powders for make-up and/or skin care can be prepared by the “dry” route or by the “wet” route if a solvent or a diluent is used to disperse the powders. Using a dry process, pulverulent materials such as fillers and pigments are mixed with a binder essentially composed of non-volatile fatty substances. By wet process, the powdery materials and the binder are diluted in a solvent to obtain a paste (otherwise called “slurry”) which is then dried. By dry process, the compact powders are generally prepared by mixing all the components of the pulverulent phase then by adding to this mixture a binding fatty phase with stirring. The mixture is then crushed, sieved, then poured into a dish and compacted. The compaction is typically carried out at a pressure of 5 to 25 MPa. By wet process, the manufacturing process uses a paste (slurry) and does not include a dry compaction step. The trend of creamy powders, with improved sensory and comfort properties compared to classic powders, is highly sought after and that is why slurry is an interesting and up-to-date technology. 'Slurry' is a term used to designate a cosmetic paste (suspension) composed of a particulate phase (fillers and pigments), a non-volatile liquid phase (binder to provide smoothness to the powder and a creamy side) and a solvent, which will be evaporated during the process.

The most commonly used solvent is isododecane but due to technological and environmental developments, water is now preferred because it is a solvent that brings fewer technological risks.

However, the use of water in a slurry process aimed at manufacturing make-up products with pigments can generate formulation incompatibilities or product surface inhomogeneities, such as mottling or other color irregularities, which give a visual aspect less perfect and less attractive for consumers.

The present invention therefore aims to provide new solid cosmetic make-up compositions, in particular compact make-up powders, which have a homogeneous appearance, in particular when they are produced by a water slurry process.

The term “homogeneous” is understood to mean a composition in which the various constituents and in particular the pigments are distributed to give a uniform or substantially uniform appearance to the naked eye. In particular, the composition obtained according to the process of the invention does not exhibit surface color irregularities, such as mottling.

A first aspect of the invention is therefore a solid cosmetic composition for caring for and/or making up keratin materials, in particular the skin, in the form of a compact powder comprising, in a physiologically acceptable medium:

a solid phase comprising at least:
loads and
pigments treated with alginate

said composition being obtainable by a process comprising the following steps: (i) mixing a liquid phase comprising at least water and the solid phase in powder form, to form a paste; and (ii) shaping of the paste by compacting and total or partial elimination of the liquid phase to obtain the composition in the form of a compact powder.

It also relates to a cosmetic process for caring for and/or making up keratin materials, in particular the skin, and more particularly the face, comprising the application to the keratin materials of a composition as defined according to the invention.

The term “composition” according to the invention generally means the final cosmetic composition obtained according to the process of the invention, to be distinguished from the paste or slurry, which is obtained in an intermediate step of the process.

DETAILED DESCRIPTION OF THE INVENTION

A first aspect of the invention is therefore a solid cosmetic composition for caring for and/or making up keratin materials, in particular the skin, in the form of a compact powder comprising, in a physiologically acceptable medium:
a solid phase comprising at least:
loads and
pigments treated with alginate

said composition being obtainable by a process comprising the following steps: (i) mixing a liquid phase comprising at least water and the solid phase in powder form, to form a paste; and (ii) shaping of the paste by compacting and total or partial elimination of the liquid phase to obtain the composition in the form of a compact powder.

By “compact powder”, is meant a solid composition based on powders, distinct from a loose powder, and more particularly in the present case, a composition comprising at least one solid phase shaped by a so-called compaction step (compression ) during which pressure is applied to a paste formed from said solid phase and a liquid phase comprising at least water, intended to provide said solid phase with cohesion such that the composition obtained is solid , namely that it does not flow under its own weight and retains its shape over time. Typically, pressure applied to the particulate phase.

As opposed to a compact powder, a loose powder is generally prepared dry by simply mixing the ingredients, possibly accompanied by grinding and sieving, without a compaction step aimed at shaping the particulate phase.

Compact powders are generally prepared by mixing all the components of the particulate phase and then adding a liquid phase to this mixture with stirring. The mixture is then poured into a cup, bucket or mold and compacted. The compaction is typically carried out at a pressure of 5 to 25 MPa, and results in a reduction in the volume of the compacted composition

A compact powder is different from a "cast" composition which, conversely, is mainly made up of waxes and binders. A cast composition is prepared by heating a fatty phase which is solid at room temperature and which needs to be melted in order to be mixed with pulverulent materials.

The composition of the invention will generally have a hardness ranging from 100 to 500 Gf (gram strength), in particular from 200 to 400 Gf (gram strength). The hardness of a composition can be measured according to the following protocol.

The hardness is measured using a TA.XT PLUS TEXTURE ANALYSER (STABLE MICROSYSTEMS) texturometer, equipped with a rod on which is fixed a cylinder with a diameter of 5mm which is applied to the surface of the compact. The cylinder penetration force is measured over a thickness of 1 mm at a speed of 0.5 mm/second.

According to a particular embodiment, the composition according to the invention is obtained by a process comprising the following steps: (i) mixing a liquid phase comprising at least water and the solid phase in powder form, to form a dough ; and (ii) shaping of the paste by compacting and total or partial elimination of the liquid phase to obtain the composition in the form of a compact powder.

By ‘partial or total elimination of the liquid phase (present in the paste)’ according to the invention, it is meant that the compact powder obtained may comprise a residual level of water depending on the moisturizing properties sought. The liquid phase removed includes water and any additional volatile solvents and binders (oils).

According to a particular mode, the total or partial elimination is done by vacuum suction, at room temperature and in particular with a suction pressure between 1 and 4 bars, a compression pressure between 1 and 4 bars (limits included).

solid phase
The solid phase is initially, before the shaping step, in powder form. This is why it will also be designated by the term particulate solid phase or even by the generic term "powder" or even "pulverulent phase" when the solid phase is designated before the shaping step, when said phase solid is mixed with a liquid phase to form a paste.

This solid phase consists of a mixture of particles of different shapes, not being limited to the following shapes: rods, platelets and spherical. According to a particular mode, the fillers in the form of platelets are in high proportion in the cosmetic formulas of the invention. To these white fillers can be added texture and touch agents such as spherical fillers to provide glide. The goal is to optimize the ratio of the different powders so that they compact while maintaining satisfactory sensoriality (gliding, pick-up and softness properties) and the desired shade.

The particulate solid phase advantageously consists of a mixture of pulverulent materials comprising at least one pigment and/or at least one filler. The pigments can be chosen from mineral pigments, organic pigments and pearlescent pigments.

Pigments treated with an additive
The mineral pigments can be chosen from iron oxides, in particular black, yellow, red and brown iron oxides; titanium dioxide, manganese violet; ultramarine blue; chromium oxides, in particular hydrated chromium oxide, ferric blue, carbon black, and mixtures thereof.

Among the organic pigments, mention may in particular be made of the lakes obtained from dyes such as the dyes D&C Black No. 2, FD&C Blue No. 1, FD&C Green No. 3, D&C Green No. 5, D&C Orange No. 4, D&C Orange No. 5, D&C orange No. 10, D&C No. red 3, D&C Red No. 6, D&C Red No. 7, D&C red No. 9, D&C red No. 13, D&C red No. 19, D&C Red No. 21, D&C Red No. 22, D&C Red No. 27, D&C Red No. 28, D&C Red No. 30, D&C Red No. 33, D&C Red No. 36, FD&C Red No. 40, FD&C Yellow No. 5, FD&C Yellow No. 6, D&C Yellow No. 10 and Cochineal Carmine.

The pearlescent pigments are for example chosen from mica covered with titanium oxide, mica-titanium covered with iron oxide, mica-titanium covered with ferric blue, mica-titanium covered with chromium oxide, or tin oxide; mica-titanium covered with an organic pigment as described previously, as well as pigments based on bismuth oxychloride.

The pigments used according to the invention are pigments treated with an alginate (INCI name: algin or alginate). By alginate or means alginate or one of its salts, in particular the sodium salt.

This anionic polysaccharide is found naturally in oceans around the world in the cell walls of brown algae and kelp. Inorganic pigments such as iron oxide and titanium dioxide treated with sodium alginate are highly hydrophilic and provide excellent dispersibility and redispersibility in the aqueous phase. Such pigments treated with a sodium alginate are marketed under the name MiyoAQUA ^© by the company Miyoshi America.

Mention may in particular be made of the pigments treated with an alginate marketed under the name MiyoAQUA ^© from Miyoshi America:

• MiyoAQUA ^© RED (CI 77491 and alginate)

• MiyoAQUA ^© BLACK (CI 77499 and alginate)
• MiyoAQUA ^© YELLOW (CI 77492 and alginate)
• MiyoAQUA^©WHITE (titanium dioxide or CI 77891 and alginate)

The composition of the invention will comprise pigments treated with an alginate in a content ranging from 0.5% to 60%, in particular from 0.8% to 50% and preferably from 1% to 30% by weight relative to the total weight of said composition.

According to a particular embodiment, for care products, the total pigment content will generally range from 0.5% to 5% by weight relative to the total weight of the composition.

According to another particular embodiment, for makeup products, the total pigment content will generally range from 8% to 30% by weight, in particular from 12% to 20% by weight relative to the total weight of the composition.

Expenses

The fillers can be mineral or organic, and of any shape, platelet, spherical or oblong.

According to a particular embodiment, the fillers are chosen from platelet fillers, spherical fillers and mixtures thereof.

The fillers advantageously have an average diameter greater than 100 nanometers and less than 200 micrometers, and more particularly a diameter of between 5 and 150 micrometers.

According to a variant implementation of the invention, the fillers can be treated so as to modify their surface condition. The fillers used can advantageously be surface-treated to make them hydrophobic or hydrophilic, while guaranteeing sufficient cohesion of the powder of the invention. According to a particular mode, the fillers can be treated in the same way as the aforementioned pigments, with a hydrophilic additive as described above.

The fillers are chosen in particular from inorganic fillers such as:

- talc preferably in the form of particles generally of dimensions less than 40 μm;

- micas of natural or synthetic origin, sericites, having dimensions of 2 to 200 micrometers (μm), preferably of 5 to 70 μm and a thickness of 0.1 to 5 μm, preferably of 0.2 to 3µm;

- kaolin having particle sizes generally less than 30 μm;

- metallic soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, for example zinc stearate, magnesium stearate or lithium stearate, zinc laurate , magnesium myristate, preferably in the form of particles having dimensions of less than 10 μm; these metallic soaps notably act as a cohesive agent in the powder;

- zinc oxides, titanium oxides; calcium carbonate; barium sulphate; magnesium carbonate, magnesium hydrocarbon, silica, glass beads, ceramic beads; boron nitride;

- and mixtures thereof.

As organic fillers, mention may be made in particular of:

- crosslinked or non-crosslinked starches, for example corn, wheat, rice or potato starches;

- cellulose powders;

- synthetic polymer powders, crosslinked or not, spheronized or not, expanded or not, such as polyamide powders (for example poly-R-alanine powders and nylon powders such as those marketed under the name ORGASOL®) , poly(meth)acrylic acid or poly(meth)acylate powders such as cross-linked methyl methacrylate powders, silicone resin powders such as silsesquioxanes,

- and mixtures thereof.

According to a particular mode, the composition of the invention will comprise at least fillers playing the role of excipient, fillers playing a role on the texture and the touch and fillers playing a role of cohesion within the composition.

Thus the composition of the invention will advantageously comprise:

• A filler selected from the group consisting of talc, mica, sericite, synthetic fluorphlogopite, boron nitride, barium sulfate, amino acids, starches, and mixtures thereof, as an excipient agent;
• A filler chosen from the group consisting of silicas, silicone resin, PMMA, cellulose, and Nylon-12, as texture or feel agent, and
• A filler chosen from the group of metallic soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, preferably chosen from zinc stearate, magnesium stearate, myristate magnesium and mixtures thereof.

Fillers can also be classified according to their shape. The composition will advantageously comprise spherical fillers and platelet fillers.

According to a particular mode, the platelet fillers are chosen from the group consisting of talc, mica, sericite, synthetic fluorphlogopite, boron nitride, barium sulphate, amino acids and their mixtures and the spherical fillers are chosen in the group consisting of silica, PMMA particles, cellulose particles, nylon particles, silicone resin particles, starches and mixtures thereof.

Thus the composition of the invention may advantageously comprise at least:

• A filler selected from the group consisting of talc, mica, sericite, synthetic fluorphlogopite, boron nitride, barium sulphate, amino acids, and mixtures thereof, as platelet filler; And
• A filler selected from the group consisting of silicas, silicone resin, PMMA, cellulose, and Nylon-12, starches and mixtures thereof as a spherical filler.

The content of spherical fillers and platelet fillers can be adjusted according to the desired properties. In particular, the composition may comprise a content ranging from 0.1 to 50%, in particular 1 to 25% by weight, of spherical fillers chosen from the group consisting of silica, silicone resin, PMMA, cellulose, Nylon-12, and mixtures thereof. , and a content ranging from 0.1% to 70%, in particular 1% to 60%, of platelet fillers.

According to a particular and preferred embodiment, the composition also comprises at least one filler chosen from metallic soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, in a content ranging from 0% to 10% by weight with respect to to the total weight of said composition, to improve the cohesion of the powder obtained according to the invention.

Liquid phase

The liquid phase comprises at least water.

It may also advantageously comprise a hydroxylated compound chosen from polyols, glycol ethers and mixtures thereof.

Depending on whether the water is totally or partially removed from the paste to form the solid composition, the water content of the final compact powder can vary from 0 to 50% by weight of the composition.

Thus, the water content of the solid compositions of the invention will generally range from 0% to 50% by weight of water, in particular from 10% to 45% by weight of water relative to the total weight of said composition.

According to a particular embodiment, the composition of the invention is anhydrous, that is to say comprising less than 1% by weight of water and advantageously is free of water (0% water). This is the case where the elimination of water from the dough is total.

According to another particular embodiment, the composition of the invention comprises a water content ranging from 1% to 40%, in particular from 5% to 30%, or even from 10% to 20% by weight relative to the total weight of the composition.

The presence of water in the compact powder makes it possible to obtain, at the time of application of the composition to the skin, a sensation of freshness resulting from the almost instantaneous evaporation of the water on contact with the skin. This surprising effect is particularly sought after in the case of compositions applied to the face because it provides a feeling of well-being sought by the consumer who uses this type of product.

The liquid phase can advantageously also comprise at least one hydroxylated compound chosen from a polyol, a polyol ether and mixtures thereof.

Among the polyols and glycol ethers, mention may be made in particular of:

- C3-C6 polyols, for example a C3-C6 aliphatic diol (or glycol) such as propane-1,2-diol (or propylene glycol), propane-1,3-diol, a butylene glycol, pentylene glycol (pentane-1,5-diol), or a triol such as glycerol,

- a glycol ether or an aromatic alcohol such as phenoxyethanol,

and their mixtures.

Preferably, the composition comprises at least one C3-C5 polyol, preferably glycerol.

The total content of polyol(s) and/or glycol ether(s) in the composition of the invention will in particular range from 1% to 30% by weight relative to the total weight of the composition, in particular from 1 % to 25% by weight relative to the total weight of the composition. According to a particular embodiment, the total content of polyol(s) and/or glycol ether(s), in particular of glycerol, ranges from 5% to 25% by weight, preferably from 5% to 15% by weight. weight relative to the total weight of the composition.

Oil phase (optional)

The composition may also optionally comprise an oily phase comprising at least one oil.

The term “oily phase” means an oil or a mixture of oils which are miscible with each other.

By “oil” is meant, within the meaning of the invention, a fatty substance, insoluble in water, liquid at 25° C. and atmospheric pressure.

These oils can be volatile or non-volatile, and of vegetable, mineral or synthetic origin.

The oily phase can comprise binders of various kinds such as fatty esters, silicones, hydrocarbon oils, butters, and mixtures thereof. According to a particular embodiment, fatty esters, hydrocarbon oils, and mixtures thereof will be used.

These compounds play the role of binders of the particulate solid phase at the time of compaction of the paste and provide cohesion, and in terms of texture, creaminess, comfort on application and a non-drying care side. the powder.

As hydrocarbon-based oils, mention may in particular be made of linear or branched C ₈ -C ₁₆ alkanes, branched C ₈ -C ₁₆ esters, hydrocarbon-based oils of plant origin, C ₁₀ -C ₄₀ synthetic ethers, C ₁₀ -C ₄₀ synthetic esters, C ₁₂ -C ₂₆ fatty alcohols, C ₁₂ -C ₂₂ higher fatty acids, and mixtures thereof.

Mention may in particular be made of isononyl isonanoate, pentaerythrityl triisostearate, iso-hexyl neopentanoate or a hydrocarbon such as isododecane, isodecane, isohexadecane, n-dodecane (C ₁₂ ) and n-tetradecane (C ₁₄ ) or the undecane-tridecane mixture.

As silicone oils, mention may in particular be made of linear or cyclic silicone oils, phenyl or non-phenyl silicone oils, and mixtures thereof.

Structuring agents

The composition of the invention may optionally comprise structuring or gelling agents of the liquid phase, in particular hydrophilic gelling agents (or suspending agents), pasty fatty substances or waxes, of animal, vegetable, mineral or synthetic origin.

By way of “hydrophilic gelling agents”, mention may in particular be made of acrylic acid polymers, polysaccharide gelling agents such as alginates, xanthan gums, carrageenan gums, agar gums, guar gums, gellan, sclerotium gums, chitosans, mannans, cellulose derivatives, gelatin, pectins, mineral gelling agents such as bentones or modified silicas, and mixtures thereof.

According to a particular embodiment, the solid composition also comprises at least one hydrophilic gelling agent chosen from a bentonite gel, a hectorite gel, and mixtures thereof.

Film forming agents

The composition may also advantageously comprise a film-forming agent, preferably a film-forming polymer.

The film-forming agents have an ability to form a film on the surface of the skin at the time of application of the composition, and make it possible to obtain an improvement in the hold over time and in the resistance to sebum, to perspiration or mechanical constraints, in particular related to facial movements. The formation of this film thus makes it possible to improve and prolong the hold of the composition, and therefore the effect produced by said composition, but also to give it a so-called “non-transfer” property.

The compositions according to the invention comprising at least one such film-forming agent are referred to as “long-wearing” and/or “non-transferring”.

These film-forming agents can be dissolved in a liquid phase according to their affinity or else be dispersed in the form of particles or latex in a phase in which they are insoluble.

These film-forming agents are advantageously polymers which can be hydrophilic in nature and thus have an affinity for the aqueous phase, or hydrophobic in nature and have an affinity for the optional oily phase of the composition.

The hydrophilic character is in particular conferred by the presence of oxygen or nitrogen atoms in the molecule, in the form of hydroxylated, carboxylic, acrylic, ester, amide, urethane or other groups comprising heteroatoms or even a ether or ketone function.

The hydrophobic nature is linked to the absence of oxygen or nitrogen atoms and more generally of heteroatoms in the molecule, and the exclusive presence of hydrocarbon groups, saturated or unsaturated, cyclic, linear or branched.

Hydrophilic film-forming agents can advantageously be chosen from synthetic compounds such as polyurethanes and their derivatives, and more particularly aqueous polyurethane dispersions which may have a solids content (dry matter) of 20 to 60% by weight, in particular polyurethane -35, polyalkylenes, such as polyisoprene.

Such polyurethane dispersions are for example Polyurethane-34 sold under the commercial references Baycusan® C1000, C1001 by the company BAYER, and Polyurethane-35, which comprises 41% polyurethane in dry matter in dispersion in water, sold under the commercial reference Baycusan® C1004 by the company BAYER (COVESTRO).

One can also advantageously choose hydrophilic film-forming agents from natural compounds or compounds of natural origin, such as native or chemically modified polysaccharides, and in particular pullulan or one of its derivatives, a starch or one of its derivatives and mixtures thereof.

According to a particular embodiment, the composition comprises a hydrophilic film-forming polymer, advantageously chosen from native or chemically modified polysaccharides.

According to a particularly preferred variant, the film-forming polymer is chosen from pullulan or its derivatives, a starch or its derivatives, in particular hydroxypropyl starch.

A particularly preferred starch derivative is hydroxypropyl starch (INCI Hydroxypropyl Starch).

According to a particularly preferred variant, the composition comprises at least one polyol or one polyol ether and at least one hydrophilic film-forming agent.

The hydrophilic film-forming polymer may be present in a content ranging from 0.1 to 10% by weight, preferably from 0.5 to 5% by weight of dry matter relative to the total weight of said composition. The percentage of hydrophilic film-forming polymer is expressed as % by weight of dry extract (dry matter or active matter, a.i.) relative to the total weight of the composition.

The composition may comprise at least one hydrophobic polymer, to improve the hold properties of the film of the composition on the skin.

Hydrophobic or fat-soluble film-forming polymer means a film-forming polymer dissolved in the optional oily phase of the composition.

The hydrophobic film-forming polymer can be of natural or synthetic origin, and is advantageously chosen from the group consisting of:

- trimethylsiloxysilicates such as Belsil TMS 803 (WACKER), KF7312 from Shin Etsu

- phenylalkylsiloxysilicates in which the alkyl group preferably comprises from 1 to 6 carbon atoms, such as phenylpropyldimethylsiloxysilicate,

- silicone acrylate polymers such as acrylate/dimethicone copolymers, and in particular acrylate/dimethicone copolymers in cyclopentasiloxane (such as for example KP-545 from Shin-Etsu), acrylate/dimethicone copolymers in methyl trimethicone (such as for example KP-549 and KP-579 from Shin-Etsu), and acrylate/dimethicone copolymers in isododecane (such as, for example, KP-550 from Shin-Etsu); acrylate/polytrimethylsiloxy-methacrylate copolymers, and in particular acrylate/polytrimethylsiloxy-methacrylate copolymers in dimethicone (such as, for example, FA-4003 DM from Dow Corning®), acrylate/polytrimethylsiloxy-methacrylate copolymers in isododecane (such as example the FA-4004 ID from Dow Corning®),

- polyalkylsilsesquioxanes comprising from 1 to 6 carbon atoms, and preferably polymethylsilsesquioxane (such as, for example, Silform® Flexible Resin from Momentive),

- trialkylsiloxysilylcarbamoyl pullulans in which the alkyl group comprises from 1 to 6 carbon atoms, and preferably trimethylsiloxysilylcarbamoyl pullulan (such as for example TSPL-30-ID from Shin-Etsu),

- copolymers of vinylpyrrolidone (VP) and alkene comprising from 2 to 20 carbon atoms, such as copolymers of VP/eicosene, VP/hexadecene, VP/styrene,

- copolymers of a vinyl ester, and preferably copolymers of vinyl acetate/allyl stearate, vinyl acetate/vinyl laurate, vinyl acetate/vinyl stearate, vinyl acetate/octadecene, vinyl acetate/octadecylvinylether , vinyl propionate/allyl laurate, vinyl propionate/vinyl laurate, vinyl stearate/octadecene-1, vinyl acetate/dodecene-1, vinyl stearate/ethyl vinyl ether, vinyl propionate/cetyl vinyl ether, vinyl stearate vinyl/allyl acetate, dimethyl-2,2-vinyl octanoate/vinyl laurate, dimethyl-2,2-allyl pentanoate/vinyl laurate, dimethyl vinyl propionate/vinyl stearate, allyl dimethyl propionate /vinyl stearate,

- polyolefins, hydrogenated or non-hydrogenated, and preferably polymers or copolymers of alkenes comprising from 2 to 20 carbon atoms, such as polybutenes, polyisobutenes, polydecenes,

- alkylcelluloses, and preferably alkylcelluloses carrying an alkyl group comprising from 2 to 6 carbon atoms, such as ethylcellulose and propylcellulose,

- polyvinyl alcohols,

And

- their mixtures.

Additional ingredients

The composition may also comprise at least one additional ingredient chosen from dyes, surfactants, perfumes, electrolytes, antioxidants, preservatives, and physical and/or chemical UV filters.

The composition of the invention can advantageously incorporate any type of cosmetic active ingredient, whether hydrophilic or lipophilic. The preferred active agents are chosen from the group consisting of active agents having a moisturizing activity such as hyaluronic acid or ceramides, active agents having an anti-aging activity; active agents having a smoothing activity and on the radiance of the complexion, active agents having a depigmenting activity or a skin lightening activity; active agents having a slimming activity; active agents having a moisturizing activity; active agents having a soothing or relaxing activity; and their mixtures.

The composition is advantageously devoid of surfactant, because it is not necessary, unlike the powders of the prior art obtained by pasting powdery materials with water, to use a surfactant to guarantee a good homogeneity of the dough. Thus, according to a particular embodiment, the surfactant content in the composition of the invention will be less than 5% by weight, in particular less than 3% by weight, preferably less than 1% by weight relative to the total weight of the composition.

According to a particular embodiment, the composition of the invention does not comprise a surfactant.

Wet preparation process (formation of an intermediate ‘slurry’ paste)

The composition of the invention based on powders is produced by the wet process by preparing a paste (or pasty composition) according to a suitable industrial process.

According to one of its aspects, the subject of the invention is a process for manufacturing the powder-based composition described above, which process comprises: (i) mixing a liquid phase comprising at least water and the phase solid in powder form comprising fillers and treated pigments as defined in the invention, to form a paste; and (ii) shaping of the paste, in particular in a silicone mould, by compacting and total or partial elimination of the liquid phase present in the paste.

Thanks to the presence of water for the embodiments with partial elimination of the liquid phase present in the paste, it is possible to incorporate in the composition of the suspending agents which will make it possible to preserve the paste for a certain time in phase of storage so that the pigments remain in suspension, that there is no release and that the paste remains homogeneous.

As suspending agents, and as described previously, magnesium aluminum silicate, hectorite, bentonite, xanthan gum, chondrus crispus and mixtures thereof may advantageously be used.

Thus, a composition of the invention will also comprise at least one suspending agent, in particular chosen from magnesium aluminum silicate, hectorite, bentonite, xanthan gum, chondrus crispus , and mixtures thereof.

The process of the present invention, using water and pigments treated with an alginate, advantageously makes it possible to obtain a homogeneous paste and homogeneous compact powders. The term “homogeneous” is understood to mean a composition in which the various constituents and in particular the pigments are distributed to give a uniform or substantially uniform appearance to the naked eye. In particular, the composition obtained according to the process of the invention does not exhibit surface color irregularities, such as mottling.

According to another of its aspects, the subject of the invention is a process for manufacturing a composition based on powders, which process comprises: (i) mixing a liquid phase comprising at least water and the phase solid in powder form comprising fillers and treated pigments as defined in the invention, to form a paste; and (ii) shaping of the paste, in particular in a silicone mould, by compacting and total or partial elimination of the liquid phase present in the paste, in particular by vacuum suction, optionally followed by freezing, and optionally drying at a temperature below 70°C.

It is implied that at the time of water removal, part of the oily (volatile) phase may also be removed.

By “total or partial elimination” according to the invention, it is meant that the compact powder obtained may comprise a residual water content in the final product. The total or partial elimination is done, according to a particular mode by vacuum suction, at room temperature and with a suction pressure between 1 and 4 bars, a compression pressure between 1 and 4 bars (limits included).

The paste ('slurry') comprises the various constituents, preferably in the following proportions:

- from 15% to 80% by weight of particulate solid phase relative to the total weight of the paste;

- 10 to 70% by weight of water relative to the total weight of the dough; And

- 0.1 to 30% by weight of oils and/or structuring agents relative to the total weight of the dough.

The water preferably represents from 10% to 70% by weight, preferably from 15 to 60% by weight of the paste.

For shaping, the dough can be placed in molds in order to undergo shaping according to a technique known to those skilled in the art. The molds can be made of metal or silicone and can be reused once the composition has been removed from the mold. The molds can also be cups or buckets which remain attached to the composition once manufactured in order to then be placed in the housing of a packaging. When the paste is liquid, it can be injected either through the bottom, the side or the top of the mold or be poured by simply filling the mold through its upper opening. An injection process by the bottom of the molds is for example known under the name “Back Injection Machine” or BIM. A method of injection from the side is for example known by the name “Side Injection”. A method of filling molds that involves pouring batter into the mold from above is known as "Top Fill." The dough can also be more viscous so that it can be dosed by preparing pieces of dough. The percentage of volatile liquid is preferably chosen such that the dough has a sufficient consistency to be able to be kneaded, measured out and cut. In this case, it is necessary to shape the paste so that the composition hugs the edges of the cups, before removing the volatile liquid. This shaping can be carried out by pressing at the same time as the elimination of the volatile liquid. The preparation process of the invention comprises a step of total or partial elimination of the volatile liquid, the objective of which is to substantially eliminate the volatile liquid in order to solidify the composition. The total or partial removal of the volatile liquid can be achieved with mechanical means such as suction, or thermal means such as heat. According to a particular and preferred mode, the total or partial elimination of the volatile liquid is done by suction under vacuum, at room temperature and with a suction pressure preferably between 1 and 4 bars, a compression pressure preferably between 1 and 4 bars (terminals included).

Those skilled in the art will know how to adapt the duration of this step to optimize the total or partial elimination of the volatile liquid. The paste may include a higher or lower proportion of volatile liquid depending on the duration and the means of elimination used.
The water thus preferably represents from 10% to 70% by weight by weight of the paste, and from 0% to 35% by weight of the final solid composition according to the invention.

The pressing (compacting) is carried out in particular by means of an imprint which comes into contact with the paste and which compresses the composition between the bottom of the mold and its surface during suction. The end of the cavity or the bottom of the mold is perforated to allow the extraction of the volatile liquid out of the dough during the suction. In this embodiment, a porous material can be deposited on the free surface of the paste in each mold, or be placed on the impression which serves as a press in order to retain the powder in the mold during suction. This porous material is for example a fabric, a weft or an absorbent sheet. It is removed from the composition once the aspiration is complete. The elimination of the volatile liquid can also comprise the combination of the means described previously. Thus, in accordance with a variant of the process of the invention, the elimination of the volatile liquid contained in the paste comprises a mechanical elimination followed by a thermal elimination.

The method may for example comprise two successive steps: the partial drying of the paste using mechanical removal means to obtain a wet powder, and the drying of the wet powder by thermal means. The mechanical elimination can be carried out by suction under a press, and the thermal elimination can be carried out for example by drying in an oven, preferably at a temperature below 70° C., more preferably still below 60° C.

According to a first preferred embodiment, the compositions of the invention are prepared by a process which comprises:

- the preparation of the dough,

- the introduction of the paste into a mould, for example by means of a pump and an injection unit which advantageously comprises nozzles allowing the paste to be injected from below or above the moulds,

- depositing a porous material on the free surface of the paste and/or depositing a plastic grid on the surface before depositing the porous material,

- the vacuuming of the filled molds and the total or partial elimination by suction of the volatile liquid present in the dough, preferably and maintaining the dough under press during the suction, and

- return to atmospheric pressure.

The present invention is particularly suitable for the preparation of cosmetic compositions intended for caring for or making up the body and/or the face. The process of the invention makes it possible to prepare a compact powder of homogeneous appearance, in which the various components and in particular the pigments are well dispersed.

Bucket process

According to a first embodiment, called ' ^1st generation' (1G process), the paste is compacted from above in a bucket.

During compaction, compression and suction are carried out simultaneously using tools with a perforated head and a compaction pattern.

The compaction fabric is in contact with the pattern. The rest of the solvent is evaporated in an oven for several hours.

Compression is carried out in two stages:

• the first compaction makes it possible to partially suck up the solvent
• the second compaction gives the final shape with patterns on the surface.

Silicone mold process

According to a second embodiment, called 2 ^nd generation (2G process), the compact powder obtained no longer needs a cup and has a three-dimensional pattern, more precise than with the previous mode. The visuals and reliefs (3D effect, precision, gestures) are unprecedented. The 2G process makes it possible to achieve surface volumes greater than 5mm, much larger than with conventional compaction, as well as a beautiful surface appearance, good pattern definition and gloss. In addition, the surface appearance of the 2G process is much more precise and brighter than the 1G process due to the absence of intermediate compacting during the creation of the relief (pattern present in the silicone mould).

This 2G process also makes it possible to incorporate a high level of binder compared to a powder formula produced by dry compaction, and to incorporate a high percentage of water in a compact powder, for example more than 20% by weight of the composition, to increase the feeling of freshness and hydration on application.

Preparation of the dough

The paste is made by pasting the powders with the binder and the solvent. The mixing of the phases is carried out using a Rayneri and a deflocculating blade.

The water, the suspending agents (e.g. bentonite and/or hectorite gels), the preservatives, the glycols and any additional oils are homogenized with stirring then the powder phase (particulate solid phase) is gradually incorporated into the rest of the mixture to form a suspension, called paste or slurry. In the case of adding volatile oils, they are incorporated after the addition of the powder phase, last.

Shaping of the powder according to the 2G process

For shaping the compact powder, silicone molds are advantageously used. These molds allow us to create new surface reliefs and patterns. These reliefs and patterns are represented in negative on the internal face of the mould.

The dough is incorporated into the silicone moulds, a support grid is added on the surface to improve the solidity of the compact.

Then a compacting cloth is added then compacting is carried out from above the mold and the solvent is sucked up using a smooth perforated surface tool.

Compaction is carried out, for example, using a top fill, back fill or side injection machine.

During compression, the canvas is no longer in contact with the pattern, so the pattern created on the surface is more precise and more in relief compared to the godet process. After compacting, the dough is placed in the freezer in their silicone molds for between 15 minutes and 2 hours to facilitate demolding and to optimize the definition of the design during demoulding.

Then, they are optionally placed in an oven at 45°C or 50°C for a longer or shorter period depending on the content of volatile solvent (water) that you want to keep in fine in the final product.

For a content between 0 and 35% by weight of water in the final product, the duration may range from a few minutes to 6 hours depending on the means used (oven, oven at 45°C or 50°C or no drying), to modulate the amount of water in the final product.

Thus, according to a particular embodiment, the compositions of the invention are prepared according to the following process, illustrated in the examples below, according to the following steps:

1. mixing of a liquid phase comprising at least water and the solid phase in powder form, to form a paste ('slurry'):
   1. the ingredients of aqueous phase A are dissolved in an excess amount of water such that phase A is approximately equivalent in weight to particulate solid phase B;
   2. the ingredients of phase B are mixed then dispersed in phase A using a Rayneri; for example at 1000 rpm for 5 to 10 minutes until a homogeneous mixture is obtained;
   3. the optional binding phase C is added last to the pasty dispersion formed by phases A and B. The slurry is homogenized, for example at 1000 revolutions/minute for 15 minutes;
2. shaping of the paste by compacting and total or partial elimination of the liquid phase to obtain the composition in the form of a compact powder, according to the following steps:
   1. the paste is incorporated into moulds, for example silicone moulds, taking care to eliminate any air bubbles; advantageously a surface support grid is added to improve the solidity of the compact;
   2. a compacting cloth is added then compacting is carried out, for example, from above the mold (Top Fill machine) and the solvent (water) is simultaneously sucked up by creating a vacuum in the enclosure (vacuum suction at temperature ambient) with a compression pressure of 1 to 4 bar and a suction pressure of 1 to 4 bar); the canvas no longer being in contact with the pattern at this stage, the pattern created on the surface is more precise and more in relief compared to the 1G process;
   3. the molds are then advantageously placed in the freezer for 30 minutes to 1 hour to allow easy unmolding;
   4. after demoulding, and if necessary, the products are placed in an oven at 50°C for 5 hours or alternatively at 45°C overnight until the water content that is desired to be retained in the final product is reached .

Galenic

According to one particular mode, the composition of the invention is in the form of a care powder or a make-up powder for the face or the lips, in particular a blush or a blusher, an eye shadow, a illuminator, sun powder, protective powder, concealer, lip powder or eyebrow powder. The composition of the invention is preferably a complexion illuminator, a complexion powder, an eye shadow, a blusher or a lipstick.

According to a particular embodiment, the composition of the invention may have three-dimensional (3D) relief patterns on the surface, bringing out a particular pattern such as a logo, an alphanumeric character or a string of alphanumeric characters, or a representation stylized with an object such as a flower.

This aspect in relief, is visually very attractive, is made possible thanks to the use of silicone molds adapted to the desired shape, the use of which is very suitable for the shaping process used for the solid composition of the compact powder type of the invention.

Powders can be applied with a brush, sponge or finger.

Cosmetic process

The invention also relates to a cosmetic process for caring for and/or making up keratin materials, in particular the skin, comprising the application to the keratin materials of a composition according to the invention.

Applied to the skin, in particular the face, the compact powder, in particular obtained by a slurry process as described above, provides the consumer with the comfort and sensoriality sought, with a good make-up result.

The invention will now be illustrated in the following non-limiting examples. Unless otherwise indicated, the % are expressed as % by weight of raw material relative to the total weight of the composition.

EXAMPLES

In the examples which follow, the term “ALG-TREATED PIGMENTS” denotes mineral pigments which have received a hydrophilic surface treatment with alginate (ALG). These treated pigments are, for example, marketed under the MiyoAQUA ^© brand by the company Miyoshi America:

• MIYOAQUA RED (CI 77491 and alginate)

• MIYOAQUA BLACK (CI 77499 and alginate)
• MIYOAQUA YELLOW (CI 77492 and alginate)
• MIYOAQUA WHITE (titanium dioxide or CI 77891 and alginate)

The pigments treated with an alginate confer on said pigments an affinity for hydrophilic media such as an aqueous phase. Their use makes it possible to surprisingly obtain a slurry of powders whose unctuous and fresh texture is particularly pleasant on application, while retaining its properties of homogeneity and hardness after shaping the slurry in the form of a compact.

In accordance with the process of the invention, in the following examples; the aqueous phase A comprises an excess of water, at least part of which is eliminated during the solvent suction step.

The initial quantity of water must therefore be calculated to obtain the percentage of intermediate water indicated at the end of the slurry preparation stage, formed by mixing phases A and B, and optionally phase C.

The elimination of the solvent is controlled so as to obtain the final percentage of water indicated in the tables below.

In the following examples, iron oxides (INCI: IRON OXIDE) treated with a hydrophilic compound according to the preceding description, of different colors are used to obtain the desired shade. More particularly, treated iron oxides of black (BLACK), yellow (YELLOW) or red (RED) color are used. It is thus possible to prepare mixtures comprising two or three colors so as to obtain the desired shade. The nature and proportion of each pigment treated in the mixture has no impact on the performance of the product, nor on the properties when it is applied to the skin.

In the examples below, the indicated percentage of treated pigment(s) represents the total quantity of treated pigment(s) used, obtained for example by adding the percentages of each color used in the mixture.

Example 1 Moisturizing compact foundation

A foundation according to the invention having a moisturizing effect for the skin is prepared.

The final formula of the composition according to the invention is presented in Table 1 below (% by weight of the final composition).

Phase Ingredients % in weight AT WATER 33.3 GLYCEROL 10.3 AT HECTORITE (BENTONE®) 0.1 AT MAGNESIUM ALUMINUM SILICATE (VEEGUM® HV) 0.1 AT PHENOXYETHANOL 0.6 AT CAPRYLYL GLYCOL 0.3 B MICA (MEARLMICA TREAT SVA) 32.2 B LAUROYL LYSIN 6.7 B CELLULOSE (CELLULOBEAD®) 2.3 B IRON OXIDE (AND) ALGINATE (MIYOAQUA®) 2.3 B TITANIUM DIOXIDE (AND) ALGINATE ((MIYOAQUA®)) 3 B PEARLS 5.5 VS UNDECANE and TRIDECANE (CETIOL® ULTIMATE MB) 3.3

Phase A: aqueous phase

Phase B: particulate phase (powders)

Phase C: oily phase

To prepare the compact foundation presented in the table above, the ingredients of Phase A including an excess of water are mixed, which are cold dispersed with a Rayneri machine at 500 rpm for 5-10 minutes.

The mixture of powders from phase B is added to phase A, then the whole is dispersed with a Rayneri machine, gradually increasing the speed to a maximum of 1200 rpm to obtain a visually homogeneous mixture.

Phase C is added last to the paste formed by phases A and B. Homogenization is continued until a homogeneous paste is obtained.

At this stage, the water is present in excess in the slurry, in an amount of 107% by weight relative to the sum of all the other ingredients of the composition of the invention.

The shaping is carried out by filling with Top Fill silicone molds equipped with a support grid. A cloth covering the composition is placed on the surface of the mould, then the solvent of the powder slurry is sucked off at 4 bars for 30 seconds.

Place the mold in the freezer for 1 hour.

After demoulding, the composition is placed in an oven at 45° C. for two hours.

After this drying step, the composition is placed in a sealed pack.

Applied to the skin of the face, the foundation provides coverage and a moisturizing and fresh effect linked to the water content in the final composition.

Example 2 Pearl highlighter

The formula of the make-up composition of the invention is presented in Table 2 below (% by weight of the final composition):

Phase Ingredients % in weight AT WATER 31 GLYCEROL 10.7 AT HECTORITE (BENTONE®) 0.1 AT MAGNESIUM ALUMINUM SILICATE (VEEGUM® HV) 0.1 AT PHENOXYETHANOL 0.7 AT CAPRYLYL GLYCOL 0.3 B PEARLS 39.1 B LAUROYL LYSIN 1.4 B CELLULOSE (CELLULOBEAD®) 2.4 B IRON OXIDE (AND) ALGINATE (MIYOAQUA®) 0.2 B TITANIUM DIOXIDE (AND) SILICA (SPHERICA HC WHITE 30) 7.3 B CALCIUM ALUMINUM BOROSILICATE 4.6 VS UNDECANE and TRIDECANE (CETIOL® ULTIMATE MB) 2.1

Phase A: aqueous phase

Phase B: particulate phase (powders)

Phase C: oily phase

To prepare the solid composition presented in the table above, the ingredients of aqueous phase A comprising an excess of water are mixed together, which are cold dispersed with a Rayneri machine at 500 revolutions/minute for 5-10 minutes.

The mixture of powders from phase B is added to phase A, then the whole is dispersed with Rayneri, gradually increasing the speed up to a maximum of 1200 rpm.

Phase C is added last to the paste formed by phases A and B. Homogenization is continued until a homogeneous paste is obtained.

At this stage, water is present in excess in the slurry, in an amount of 74% by weight compared to the sum of all the other components of the mixture.

The shaping is carried out by filling with Top Fill silicone molds equipped with a support grid. A cloth covering the composition is placed on the surface of the mould, then a step of compression (Pressure = 2 bars) and suction of the solvent (Pressure = 2 bars) for 20 seconds is carried out.

Place the mold in the freezer for 1 hour.

After demoulding, the composition is placed in an oven at 45° C. for one hour.

After the drying step, the composition is placed in a waterproof pack.

Hardness measurement

The hardness is measured according to the protocol of Example 2.

The average hardness of the composition of this example 4, measured on two parts, according to the protocol previously described, is equal to 316 grams force (Gf).

The foundation, after application to the skin of the face, provides a radiance effect to the complexion coupled with a moisturizing effect on the skin.

Example 3 Eyeshadow for care

An eyeshadow is prepared according to the formula presented in Table 3 below (% by weight of the final composition):

Phase Ingredients % in weight AT WATER 37.6 AT GLYCEROL 9.7 AT HECTORITE (BENTONE®) 0.1 AT MAGNESIUM ALUMINUM SILICATE (VEEGUM® HV) 0.1 AT PHENOXYETHANOL 0.6 AT CAPRYLYL GLYCOL 0.2 B LAUROYL LYSIN 1.2 B CELLULOSE (CELLULOBEAD®) 2.2 B IRON OXIDE (AND) ALGINATE (MIYOAQUA®) 6.3 B MICA (AND) LAUROYL LYSINE (MMEARLMICA® treated with SVA) 21.4 B PEARLS 18.7 VS UNDECANE and TRIDECANE (CETIOL® ULTIMATE MB) 1.9

Phase A: aqueous phase

Phase B: particulate phase (powders)

Phase C: oily phase

To prepare the eyeshadow presented in the table above, the ingredients of Phase A including an excess of water are mixed, which are cold dispersed in a Rayneri machine at 500 rpm for 5-10 minutes.

The mixture of powders from phase B is added to phase A, then the whole is dispersed with Rayneri, gradually increasing the speed up to a maximum of 1200 rpm.

Phase C is added last, continuing the homogenization.

At this stage, the water is present in excess in the slurry, in an amount of 100% by weight compared to the sum of all the other components of the mixture.

The shaping is carried out by filling with Top Fill silicone molds equipped with a support grid. A cloth covering the composition is placed on the surface of the mould, then a step of compression (Pressure = 2 bars) and solvent suction (Pressure = 1 bar) for 20 seconds is carried out.

Place the mold in the freezer for 1 hour.

After demoulding, the composition is placed in a sealed pack.

The composition of the example is useful for the care of the skin of the eyelids.

Example 4 Highlighter

A complexion illuminator is prepared according to the formula presented in Table 4 below (% by weight of the final composition):

Phase Ingredients % in weight AT WATER 30.4 AT GLYCEROL 10.8 AT HECTORITE (BENTONE®) 0.1 AT MAGNESIUM ALUMINUM SILICATE (VEEGUM® HV) 0.1 AT PHENOXYETHANOL 0.6 AT CAPRYLYL GLYCOL 0.3 AT PULLULAN 1.5 B LAUROYL LYSIN 1.4 B CELLULOSE (CELLULOBEAD®) 2.4 B IRON OXIDE (AND) ALGINATE (MIYOAQUA®) 0.2 B MICA (AND) LAUROYL LYSINE (MEARLMICA® treated SVA 12.8 B PEARLS 37.3 VS UNDECANE and TRIDECANE (CETIOL® ULTIMATE MB) 2.1

Phase A: aqueous phase

Phase B: particulate phase (powders)

Phase C: oily phase

To prepare the compact illuminator presented in the table above, the ingredients of Phase A including an excess of water are mixed together and cold dispersed with a Rayneri machine at 500 rpm for 5-10 minutes.

The powder mixture of phase B is added to phase A, then the whole is dispersed with Rayneri, gradually increasing the speed up to a maximum of 1200 rpm.

The oily phase C is added last, continuing the homogenization.

At this stage, water is present in excess in the slurry, in an amount of 74% by weight compared to the sum of all the other components of the mixture.

The shaping is carried out by filling with Top Fill silicone molds equipped with a support grid. A cloth covering the composition is placed on the surface of the mould, then a step of compression (Pressure = 2 bars) and solvent suction (Pressure = 1 bar) for 20 seconds is carried out.

Place the mold in the freezer for 1 hour.

After demoulding, the composition is placed in a sealed pack.

The solid illuminator thus prepared is applied to the skin of the face to produce a radiant effect of the complexion of the skin. It also has improved hold due to the presence of pullulan, a hydrophilic polymer that improves the formation of a resistant film on the skin.

Example 5 Pearly foundation

A foundation is prepared according to the final formula shown in Table 5 below (% by weight of the final composition):

Phase Ingredients % in weight AT WATER 31 GLYCEROL 10.7 AT HECTORITE (BENTONE®) 0.1 AT MAGNESIUM ALUMINUM SILICATE (VEEGUM® HV) 0.1 AT PHENOXYETHANOL 0.6 AT CAPRYLYL GLYCOL 0.3 B PEARLS 40.3 B LAUROYL LYSIN 1.7 B CELLULOSE (CELLULOBEAD®) 2.4 B IRON OXIDE (AND) ALGINATE (MIYOAQUA®) 4.4 B TITANIUM DIOXIDE (AND) SILICA (SPHERICA HC WHITE 30) 6.3 VS UNDECANE and TRIDECANE (CETIOL® ULTIMATE MB) 2.1

To prepare the foundation presented in the table above, the ingredients of Phase A including an excess of water are mixed together and cold dispersed with a Rayneri machine at 500 rpm for 5-10 minutes.

The mixture of powders from phase B is added to phase A, then the whole is dispersed with Rayneri, gradually increasing the speed up to a maximum of 1200 rpm.

Phase C is added last while continuing to homogenize the paste.

At this stage, water is present in excess in the slurry, in an amount of 83% by weight compared to the sum of all the other components of the mixture.

The shaping is carried out by filling with Top Fill silicone molds equipped with a support grid. We place a canvas, then we proceed to a step of compression (Pressure = 2 bars) and suction of the solvent (Pressure = 1 bar) for 20 seconds

Place the mold in the freezer for 1 hour.

After demoulding, the composition is placed in a sealed pack.

Applied to the skin, the composition brings a radiance effect to the complexion and a freshness effect linked to the presence of water in the final composition.

Example 6 Matte pink highlighter

A complexion illuminator having a matte finish on the skin is prepared.

The formula of the final composition is presented in Table 6 below (% by weight of the final composition):

Phase Ingredients % in weight AT WATER 32.2 AT GLYCEROL 10.5 AT HECTORITE (BENTONE®) 0.1 AT MAGNESIUM ALUMINUM SILICATE (VEEGUM® HV) 0.1 AT ETHYLHEXYLGLYCERIN 0.5 AT HYDROXYACETOPHENONE 0.1 AT CHLORPHENESIN 0.3 AT CAPRYLYL GLYCOL 0.5 AT 2.3 HEXANEDIOL1.0 1.0 B LAUROYL LYSIN 1.3 B CELLULOSE (CELLULOBEAD®) 2.4 B IRON OXIDE (AND) ALGINATE (MIYOAQUA®) 0.2 PEARLS 36.2 B MICA (MICA H) 12.6 VS UNDECANE and TRIDECANE (CETIOL® ULTIMATE MB) 2.0

Phase A: aqueous phase

Phase B: particulate phase (powders)

Phase C: oily phase

To prepare the compact illuminator presented in the table above, the ingredients of Phase A including an excess of water are mixed, which are cold dispersed with a Rayneri machine at 500 rpm for 5-10 minutes. The mixture of powders from phase B is then added to phase A, then the whole is dispersed with Rayneri, gradually increasing the speed up to a maximum of 1200 rpm.

Phase C is added last, continuing the homogenization.

At this stage, the water is present in excess in the slurry, in an amount of 88% by weight compared to the sum of all the other ingredients of the mixture.

The shaping is carried out by filling with Top Fill silicone molds equipped with a support grid. A cloth covering the composition is placed on the surface of the mould, then a step of compression (Pressure = 2 bars) and suction of the solvent (Pressure = 1 bar) for 20 seconds is carried out.

Place the mold in the freezer for 1 hour.

After demoulding, the composition is placed in a sealed pack.

The highlighter in the example is applied to the skin of the face for a rosy matte finish. The dullness is linked to the use of Mica H in the powder mixture.

Claims (10)

Solid cosmetic composition for caring for and/or making up keratin materials, in particular the skin, in the form of a compact powder comprising, in a physiologically acceptable medium, a solid phase comprising at least:
loads and
pigments treated with alginate
said composition being capable of being obtained by a process comprising the following steps: (i) mixing a liquid phase comprising at least water and the solid phase in powder form, to form a paste; and (ii) shaping of the paste by compacting and total or partial elimination of the liquid phase to obtain the composition in the form of a compact powder. Cosmetic composition according to Claim 1, characterized in that the pigments are chosen from iron oxides and titanium dioxide treated with an alginate. Cosmetic composition according to one of Claims 1 to 2, characterized in that the said pigments treated with an alginate are present in the composition in a content ranging from 0.5% to 60% by weight relative to the total weight of the said composition. Cosmetic composition according to any one of Claims 1 to 3, characterized in that the fillers are chosen from platelet fillers, spherical fillers and mixtures thereof. Cosmetic composition according to Claim 4, characterized in that the platelet fillers are chosen from the group consisting of talc, mica, sericite, synthetic fluorphlogopite, boron nitride, barium sulphate, and their mixtures and the fillers spherical particles are chosen from the group consisting of silica, PMMA particles, cellulose particles, nylon particles, silicone resin particles, and mixtures thereof. Cosmetic composition according to any one of Claims 1 to 5, characterized in that it additionally comprises suspending agents, in particular chosen from hectorite and bentonite gels, and mixtures thereof, and optionally cohesion agents, in particular chosen from magnesium stearate, zinc stearate, magnesium myristate, and mixtures thereof. Cosmetic composition according to any one of Claims 1 to 6, characterized in that it is in the form of a care powder or a make-up powder for the face or the lips, in particular a blush or a make-up blusher, eyeshadow, highlighter, bronzer, protective face powder, concealer, lip powder or eyebrow powder, preferably a face powder, highlighter , blush or eye shadow. Cosmetic composition according to any one of Claims 1 to 7, characterized in that it has 3-dimensional (3D) relief patterns on the surface. Process for the manufacture of a cosmetic composition as defined in any one of Claims 1 to 8, characterized in that it comprises the following stages: (i) mixing of a liquid phase comprising at least water and solid phase in powder form comprising fillers and treated pigments as defined in claim 1, to form a paste; and (ii) shaping of the paste, in particular in a silicone mould, by compacting and total or partial elimination of the liquid phase present in the paste. Cosmetic process for caring for and/or making up keratin materials, in particular the skin, comprising the application to the keratin materials of a composition as defined according to any one of Claims 1 to 8.