Solid composition in powder form comprising a film-forming polymer in the solid state

Abstract

The present invention thus relates to a solid composition in powder form, notably for coating keratin materials, more particularly for making up and / or caring for keratin materials, such as the skin, notably comprising a physiologically acceptable medium and containing at least: a) a pulverulent phase, and b) at least one film-forming polymer in the solid state. Another subject of the invention relates to a process for producing a solid composition as defined above, consisting in milling said film-forming polymer, in the solid state, with at least part of the pulverulent phase, in particular the particulate dyestuffs present in the composition. The invention also relates to a process for coating keratin materials, more particularly for for caring for and / or making up keratin materials such as the skin, characterized in that it comprises the application to the keratin materials of a solid composition as defined previously.

Description

Solid composition in powder form comprising a film-forming polymer in the solid stateThe present invention relates to the field of solid cosmetic care and / or makeup compositions.The galenical forms conventionally adopted for solid compositions are generally loose, pressed or compact powders. As nonlimiting illustrations of the solid galenical forms more particularly considered in the field of makeup, mention may be made especially of loose, pressed or compact powders such as foundations, face powders and eyeshadows.The function of the abovementioned powders is mainly to give color, mattness and even, for those more particularly intended for facial skin, to improve the wear property of a foundation or, if used alone, to give coverage (powder foundation).These presentation forms are particularly appreciated by users with regard to their lightness, softness, tack-free aspect or non-greasy feel.In general, these compositions combine a pulverulent phase that is generally predominant with a binder phase usually featured by a liquid fatty phase. The pulverulent phase is formed essentially of fillers combined with pigments, the amount of these pigments being modified to afford the desired makeup effect, generally a color effect. As regards the fillers, it is generally preferred to choose materials that are capable of showing absorbing and / or adsorbing capacity with regard to the associated binder phase.Makeup compositions in powder form generally exhibit poor wear property performance. This is explained in particular by the fact that these compositions generally do not comprise a film-forming polymer making it possible to improve the resistance of the deposit. Nevertheless, it remains possible to produce makeup compositions comprising a film-forming polymer solubilized in a volatile solvent in order to convey said film-forming polymer. Such prior art compositions comprising a solubilized film-forming polymer are described in particular in patent application EP2408419A1 and patents EP2616043B1 and FR 1057468B1. However, these compositions in powder form require the use of leaktight packaging to prevent evaporation of the volatile solvent. This is restrictive and represents a cost. In addition, these compositions tend to gradually degrade over time as they are used, due to evaporation of the solvent.There is therefore still a need to produce novel cosmetic powders for caring for and / or making up keratin materials such as the skin which have good wear, based on a film-forming polymer, without the drawbacks mentioned above, in particular which have good stability over time as they are used, without the need to use a leaktight packaging.The applicant has discovered, surprisingly, that this objective was achieved with a solid composition in the form of a powder, notably for coating keratin materials, more particularly for making up and / or caring for keratin materials, such as the skin, notably comprising a physiologically acceptable medium and containing at least:a) a pulverulent phase, andb) at least one film-forming polymer in the solid state.This discovery forms the basis of the invention.The present invention thus relates to a solid composition in the form of a powder, notably for coating keratin materials, more particularly for making up and / or caring for keratin materials, such as the skin, notably comprising a physiologically acceptable medium and containing at least:a) a pulverulent phase, andb) at least one film-forming polymer in the solid state.Another subject of the invention relates to a process for producing a solid composition in powder form as defined above, consisting in milling said film-forming polymer, in the solid state, with at least part of the pulverulent phase, in particular the particulate dyestuffs present in the composition.Another subject of the invention also relates to a solid composition in powder form that can be obtained by said preparation process.The invention also relates to a process for coating keratin materials, more particularly for caring for and / or making up keratin materials such as the skin, characterized in that it comprises the application to the keratin materials of a composition as defined above.Another subject of the invention relates to a process for coating keratin materials, more particularly for caring for and / or making up keratin materials, such as the skin, characterized in that it comprisesa) applying to the keratin materials a first layer with a care composition (A) (base coat) comprising, in particular in a physiologically acceptable medium, at least one oily phase; andb) applying, on the first layer formed by said composition (A), a second layer with a composition (B) (top coat) constituted of a composition as defined above.DefinitionsIn the context of the present invention, the term “keratin material” notably means the skin (of the body, face, area around the eyes, or eyelids).The term “physiologically acceptable” means compatible with the skin and / or its integuments, which has a pleasant color, odor and feel, and which does not cause any unacceptable discomfort (stinging or tautness) liable to discourage the consumer from using this composition.For the purposes the present invention, the term "solid composition" is intended to designate the state of the composition at ambient temperature (25°C) and at atmospheric pressure (760 mmHg or 105Pa), i.e. a composition of high consistency, which maintains its form during storage. In contrast to "fluid" compositions, it does not flow under its own weight. It is advantageously characterized by hardness, in particular by performing a Zwick measurement, the measurement of this hardness being carried out by means of a truncated measuring tip and a measuring force is applied to the sample to be tested. The tip penetrates the sample, and the hardness tester measures its displacement into the powder. This displacement is converted into Shore A hardness units.The composition according to the invention preferably comprises less than 3.0% by weight and preferably less than 2.0% by weight of water relative to the total weight of the composition, or even is free of water.The term "loose powder" is understood to mean a product constituted of particles which are not subjected to cohesion.The term "compact powder" means a mass of product of which the cohesion is at least partly provided by compacting or, preferably, pressing during the manufacture.The composition according to the invention advantageously has a solids content of greater than or equal to 85%, better still 90%, or even 95%.For the purposes of the present invention, the term "solids content" denotes the content of nonvolatile matter.The amount of solids content (abbreviated as SC) of a composition according to the invention is measured using a Halogen Moisture Analyzer HR 73® commercial halogen desiccator from Mettler Toledo. The measurement is performed on the basis of the weight loss of a sample dried by halogen heating, and thus represents the percentage of residual matter once the water and the volatile matter have evaporated off.This technique is fully described in the machine documentation supplied by Mettler Toledo. The measuring protocol is as follows: Approximately 2 g of the composition, referred to hereinbelow as the sample, are spread out on a metal crucible, which is placed in the halogen desiccator mentioned above. The sample is then subjected to a temperature of 105°C until a constant weight is obtained. The wet mass of the sample, corresponding to its initial mass, and the dry mass of the sample, corresponding to its mass after halogen heating, are measured using a precision balance. The experimental error associated with the measurement is of the order of plus or minus 2%. The solids content is calculated in the following manner:Solids content (expressed as % by weight) = 100 × (Dry Mass / Total Mass)Preferably, the composition comprises a proportion of volatile oil of less than 15% by weight, preferably less than 10% by weight, preferably less than 5% by weight relative to the total weight of the composition, the composition preferably being free of volatile oil.The term “oil” means a fatty substance that is liquid at ambient temperature (25°C) and atmospheric pressure (760 mmHg, i.e. 101 325 Pa).For the purposes of the invention, the term “volatile oil” refers to any oil that is capable of evaporating on contact with the skin in less than one hour, at ambient temperature and atmospheric pressure. The volatile oil is a volatile cosmetic compound, liquid at ambient temperature, having in particular a non-zero vapor pressure, at ambient temperature and atmospheric pressure, in particular having a vapor pressure ranging from 2.66 Pa to 40 000 Pa, especially ranging from 2.66 Pa to 13 000 Pa, and more particularly ranging from 2.66 Pa to 1300 Pa.The volatile oil(s) may be chosen from hydrocarbon oils, silicone oils, and mixtures thereof.“Hydrocarbon oil” means an oil mainly containing hydrogen and carbon atoms and optionally one or more functions chosen from hydroxyl, ester, ether and carboxylic functions.For the purposes of the present invention, the term “silicone oil” is understood to mean an oil comprising at least one Si-O group, and more particularly an organopolysiloxane.Preferably, the solid composition according to the invention is in the form of a loose powder or a compact powder.Preferably, the solid composition according to the invention is an eyeshadow, an eyebrow composition, an eyeliner, a blusher or a face powder. Even more preferentially, the composition is an eyeshadow or a blusher.Pulverulent phaseA solid composition according to the invention preferably has a content of pulverulent phase of greater than or equal to 50.0% by weight, in particular greater than or equal to 60.0% by weight, more particularly ranging from 60% to 80% by weight, relative to the total weight of the composition.The pulverulent phase comprises at least one filler and / or at least one particulate dyestuff.FillersThe term “fillers” should be understood as meaning colorless or white solid particles of any form, which are in a form that is insoluble and dispersed in the medium of the composition. Mineral or organic in nature, they make it possible to confer softness, mattness and uniformity of makeup on the composition.The filler(s) used in the composition of the invention is (are) chosen from mineral fillers, organic fillers and mixtures thereof.The filler(s) used in the composition of the invention is (are) present in the composition of the invention preferably in a content ranging from 0% to 90% by weight, more preferentially from 50% to 80% by weight relative to the total weight of the composition.The filler(s) used in the composition of the invention is (are) present preferably in a content ranging from 0% to 95% by weight, more preferentially from 25% to 90% by weight relative to the total weight of the pulverulent phase.Among the mineral fillers that may be used in the compositions according to the invention, mention may be made of talcs, natural micas, synthetic micas such as fluorphlogopite, silica, magnesium aluminum silicates, kaolin, bentone, calcium carbonate, magnesium hydrogen carbonate, hydroxyapatite, boron nitride, hollow silica microspheres (Silica Beads from Maprecos), silica-based fillers, for instance Aerosil 200® or Aerosil 300®; Sunsphere H-33® and Sunsphere H-51® sold by Asahi Glass; Chemicelen® sold by Asahi Chemical; composites of silica and of titanium dioxide, for instance the TSG® series sold by Nippon Sheet Glass, perlite powders, and mixtures thereof.Among the organic fillers that may be used in compositions according to the invention, mention may be made of polyamide powders (Nylon® Orgasol from Atochem), poly-β-alanine and polyethylene powders, polytetrafluoroethylene (TeflonÒ), powders, lauroyl-lysine, starches such as native corn starches having the INCI name:Zea mays(corn) Starch, modified starches such as aluminum starch octenylsuccinate (Dry Flo), tetrafluoroethylene polymer powders, metal soaps derived from organic carboxylic acids containing from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, for example, zinc, magnesium or lithium stearate, zinc laurate, magnesium myristate, Polypore® L 200 (Chemdal Corporation), silicone resin microbeads (Tospearl® from Toshiba, for example), spherical organopolysiloxane elastomer powders having the INCI name: Dimethicone / vinyl dimethicone crosspolymer (Dowsil TrefilE-506 S Silicone Powder®, Dowsil 9506 Powder® from Dow Corning Chemical), polyurethane powders, in particular powders of crosslinked polyurethane comprising a copolymer, said copolymer comprising trimethylol hexyllactone, for instance the hexamethylene diisocyanate / trimethylol hexyllactone polymer sold under the name Plastic Powder D-400® or Plastic Powder D-800® by Toshiki, carnauba microwaxes, such as the product sold under the name MicroCare 350® by Micro Powders, microwaxes of synthetic wax, such as the product sold under the name MicroEase 114S® by Micro Powders, microwaxes constituted of a mixture of carnauba wax and of polyethylene wax, such as those sold under the names MicroCare 300® and 310® by Micro Powders, microwaxes constituted of a mixture of carnauba wax and of synthetic wax, such as the product sold under the name MicroCare 325® by Micro Powders, polyethylene microwaxes, such as those sold under the names Micropoly 200®, 220®, 220L® and 250S® by Micro Powders; fibers of synthetic or natural and mineral or organic origin. They may be short or long, individual or organized, for example braided, and hollow or solid. They may have any shape and may in particular have a circular or polygonal (square, hexagonal or octagonal) cross section depending on the specific application envisaged. In particular, their ends are blunted and / or polished to prevent injury. The fibers have a length ranging from 1 µm to 10 mm, preferably from 0.1 mm to 5 mm and better still from 0.3 mm to 3 mm. Their cross section may be included in a circle with a diameter ranging from 2 nm to 500 µm, preferably ranging from 100 nm to 100 µm and better still from 1 µm to 50 µm; and mixtures thereof.Particulate dyestuffThe particulate dyestuff(s) according to the invention is (are) preferably chosen from pigments, nacres and reflective particles, and mixtures thereof.A composition according to the invention may comprise a content of particulate dyestuff(s) preferably ranging from 5% to 90% by weight and preferentially ranging from 10% to 70% by weight relative to the total weight of the composition.The pulverulent phase of the composition according to the invention may comprise a content of particulate dyestuffs(s) preferably ranging from 5% to 100% by weight and preferentially ranging from 10% to 75% by weight relative to the total weight of the pulverulent phase.PigmentsThe term “pigments” should be understood as meaning white or colored, mineral or organic particles of any shape, which are insoluble in the physiological medium.The pigments may be white or colored, and mineral and / or organic.Among the mineral pigments that may be mentioned are titanium dioxide, zirconium oxide or cerium oxide, and also zinc oxide, iron oxide (black, yellow or red) or chromium oxide, manganese violet, ultramarine blue, pink or violet, chromium hydrate and ferric blue, bismuth oxychloride and metal powders, for instance aluminum powder or copper powder.According to a particular form of the invention, the mineral pigment comprises at least one lipophilic or hydrophobic coating.According to a particular embodiment of the invention, the pigments may be coated according to the invention with at least one compound chosen from metal soaps; N-acylamino acids or salts thereof; lecithin and derivatives thereof; isopropyl triisostearyl titanate; isostearyl sebacate; natural plant or animal waxes; synthetic polar waxes; fatty esters; phospholipids; silicone surfactants such as organopolysiloxanes, alkylalkoxysilanes such as triethoxycaprylylsilane; fluorinated surfactants such as perfluoroalkyl phosphates, perfluoropolyethers, polytetrafluoropolyethylenes (PTFE), perfluoroalkanes, perfluoroalkyl silazanes, poly(hexafluoropropylene oxide)s, polyorganosiloxanes comprising perfluoroalkyl perfluoropolyether groups; fluorosilicone surfactants such as perfluoroalkyl dimethicones, perfluoroalkyl silanes and perfluoroalkyl trialkoxysilanes; and mixtures thereof.According to a particular embodiment, the pigments may be coated according to the invention with an N-acylamino acid or a salt thereof, which may comprise an acyl group containing from 8 to 22 carbon atoms, for instance a 2-ethylhexanoyl, caproyl, lauroyl, myristoyl, palmitoyl, stearoyl or cocoyl group.The amino acid may be, for example, lysine, glutamic acid or alanine. The salts of these compounds may be the aluminum, magnesium, calcium, zirconium, zinc, sodium or potassium salts. Thus, according to a particularly preferred embodiment, the pigments can be coated with an N-acylamino acid derivative which can in particular be a glutamic acid derivative and / or one of its salts, and more particularly a stearoyl glutamate, such as, for example, aluminum stearoyl glutamate. Mention may be made, as examples of pigments treated with aluminum stearoyl glutamate, of titanium dioxide pigments and black, red and yellow iron oxide pigments sold under the trade name Nai® by Miyoshi Kasei.According to a particular embodiment, the pigments can be coated according to the invention with isopropyl titanium triisostearate. Mention may be made, as examples of pigments treated with isopropyl titanium triisostearate (ITT), of those sold under the trade names BWBO-I2® (Iron Oxide CI77499 and Isopropyl Titanium Triisostearate), BWYO-I2® (Iron Oxide CI77492 and Isopropyl Titanium Triisostearate) and BWRO-I2® (Iron Oxide CI77491 and Isopropyl Titanium Triisostearate) by Kobo.The organic pigments may be chosen from the materials below, and mixtures thereof:- cochineal carmine,- organic pigments of azo dyes, anthraquinone dyes, indigoid dyes, xanthene dyes, pyrene dyes, quinoline dyes, triphenylmethane dyes and fluoran dyes.Among the organic pigments, mention may notably be made of the D&C certified pigments known under the following names: D&C Blue No. 4, D&C Brown No. 1, D&C Green No. 5, D&C Green No. 6, D&C Orange No. 4, D&C Orange No. 5, D&C Orange No. 10, D&C Orange No. 11, D&C Red No. 6, D&C Red No. 7, D&C Red No. 17, 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. 31, D&C Red No. 33, D&C Red No. 34, D&C Red No. 36, D&C Violet No. 2, D&C Yellow No. 7, D&C Yellow No. 8, D&C Yellow No. 10, D&C Yellow No. 11, FD&C Blue No. 1, FD&C Green No. 3, FD&C Red No. 40, FD&C Yellow No. 5, FD&C Yellow No. 6.The chemical materials corresponding to each of the organic dyestuffs mentioned previously are mentioned in the publication “International Cosmetic Ingredient Dictionary and Handbook”, 1997 edition, pages 371 to 386 and 524 to 528, published by “The Cosmetic, Toiletries and Fragrance Association”.More particularly, the pigments will be chosen from titanium dioxides, iron oxides (black, yellow or red), and mixtures thereof; said pigments optionally comprising at least one lipophilic or hydrophobic coating.NacresThe term “nacres” should be understood as meaning colored particles of any form, which may or may not be iridescent, notably produced by certain molluscs in their shell, or else synthesized, and which have a color effect via optical interference.Examples of nacres that may be mentioned include nacreous pigments such as titanium mica coated with an iron oxide, mica coated with bismuth oxychloride, titanium mica coated with chromium oxide, and nacreous pigments based on bismuth oxychloride. They may also be mica particles, at the surface of which are superposed at least two successive layers of metal oxides and / or of organic dyestuffs.The nacres can more particularly have a yellow, pink, red, bronze, orangey, brown, green, blue, violet and / or coppery color or tint.As illustrations of the nacres that can be introduced into the composition, mention may also be made of the gold-colored nacres sold notably by Engelhard under the name Brilliant Gold 212G® (Timica), Gold 222C® (Cloisonne), Sparkle Gold® (Timica), Gold 4504® (Chromalite) and Monarch Gold 233X® (Cloisonne); the bronze nacres sold notably by Merck under the name Bronze Fine® (17384) (Colorona) and Bronze® (17353) (Colorona) and by Engelhard under the name Super Bronze® (Cloisonne); the orange nacres sold notably by Engelhard under the name Orange 363C® (Cloisonne) and Orange MCR 101® (Cosmica) and by Merck under the name Passion Orange® (Colorona) and Matte Orange® (17449) (Microna); the brown nacres sold notably by Engelhard under the name Nu-antique Copper 340XB® (Cloisonne) and Brown CL4509® (Chromalite); the nacres with a copper tint sold notably by Engelhard under the name Copper 340A® (Timica); the nacres with a red tint sold notably by Merck under the name Sienna Fine® (17386) (Colorona); the nacres with a yellow tint sold notably by Engelhard under the name Yellow® (4502) (Chromalite); the red nacres with a gold tint sold notably by BASF under the name Sunstone G012® (Gemtone); the pink nacres sold notably by Engelhard under the name Tan Opale G005® (Gemtone); the black nacres with a gold tint sold notably by Engelhard under the name Nu-antique Bronze 240 AB® (Timica), the blue nacres sold notably by Merck under the name Matte Blue® (17433) (Microna), the white nacres with a silvery tint sold notably by Merck under the name Xirona Silver®, and the golden-green pink-orange nacres sold notably by Merck under the name Indian Summer® (Xirona), and mixtures thereof.Still as examples of nacres, mention may also be made of particles including a borosilicate substrate coated with titanium oxide.Particles comprising a glass substrate coated with titanium oxide are notably sold under the name Metashine MC1080RY by Toyal.Finally, examples of nacres that may also be mentioned include polyethylene terephthalate glitter flakes, notably those sold by Meadowbrook Inventions under the name Silver 1P 0.004X0.004 (silver glitter flakes).A composition according to the invention may comprise a nacre content preferably ranging from 1% to 50% by weight, more preferentially ranging from 1% to 30% by weight relative to the total weight of the composition.Reflective particlesThe term “reflective particles” denotes particles of which the size, structure, especially the thickness of the layer(s) of which they are made and their physical and chemical nature, and surface state, allow them to reflect incident light. This reflection may, where appropriate, have an intensity sufficient to create at the surface of the composition or of the mixture, when it is applied to the support to be made up, highlight points that are visible to the naked eye, i.e. more luminous points that contrast with their environment making them appear to sparkle.The reflective particles may be selected so as not to significantly alter the coloration effect generated by the coloring agents with which they are combined, and more particularly so as to optimize this effect in terms of color rendition. They may more particularly have a yellow, pink, red, bronze, orangey, brown, gold and / or coppery color or tint.These particles may have varied forms and may notably be in platelet or globular form, in particular in spherical form.The reflective particles, whatever their form, may or may not have a multilayer structure and, in the case of a multilayer structure, may have, for example, at least one layer of uniform thickness, notably of a reflective material.When the reflective particles do not have a multilayer structure, they may be composed, for example, of metal oxides, notably titanium or iron oxides obtained synthetically.When the reflective particles have a multilayer structure, they may include, for example, a natural or synthetic substrate, notably a synthetic substrate at least partially coated with at least one layer of a reflective material, notably of at least one metal or metallic material. The substrate may be made of one or more organic and / or mineral materials.More particularly, it may be chosen from glasses, ceramics, graphite, metal oxides, aluminas, silicas, silicates, notably aluminosilicates and borosilicates, and synthetic mica, and mixtures thereof, this list not being limiting.The reflective material may include a layer of metal or of a metallic material.Reflective particles are notably described in JP-A-09188830, JP-A-10158450, JP-A-10158541, JP-A-07258460 and JP-A-05017710.Again as an example of reflective particles including a mineral substrate coated with a layer of metal, mention may also be made of particles including a silver-coated borosilicate substrate.Particles with a silver-coated glass substrate, in the form of platelets, are sold under the name Microglass Metashine REFSX 2025 PS® by Toyal. Particles with a glass substrate coated with a nickel / chromium / molybdenum alloy are sold under the names Crystal Star GF 550® and GF 2525® by this same company.Use may also be made of particles comprising a metal substrate, such as silver, aluminum, iron, chromium, nickel, molybdenum, gold, copper, zinc, tin, magnesium, steel, bronze or titanium, said substrate being coated with at least one layer of at least one metal oxide, such as titanium oxide, aluminum oxide, iron oxide, cerium oxide, chromium oxide, silicon oxides and mixtures thereof.Examples that may be mentioned include aluminum powder, bronze powder or copper powder coated with SiO2, sold under the name Visionaire® by Eckart.According to a particular form of the invention, the particulate dyestuff(s) is (are) chosen from:- titanium dioxide (CI: 77891) such as the commercial product Hombitan FF Pharma® sold by Venator;- yellow iron oxide (CI: 77492), red iron oxide (CI: 77491), black iron oxide (CI: 77499), and mixtures thereof, such as the products sold under the trade name Sunpuro® by Sun;- nacres, for instance those based on mica covered with titanium dioxide and / or iron oxide, such as the product sold under the trade name Timiron Pearl Sheen MP 30® by Merck; those based on mica, barium sulfate and titanium dioxide, such as the product sold under the trade name Ronaflair Low Luster Pigment® by Merck;- bismuth oxychloride, such as the product sold under the trade name Ronaflair LF 2000® by Merck;- mixtures thereof.More particularly, the particulate dyestuff(s) will be chosen from pigments and more particularly from titanium dioxides, iron oxides (black, yellow or red), and mixtures thereof; said pigments optionally comprising at least one lipophilic or hydrophobic coating agent.Film-forming polymerThe solid composition in the form of a loose or compact powder of the invention comprises at least one film-forming polymer in the solid state.For the purposes of the invention, the term “polymer” is understood to mean a compound corresponding to the repetition of one or more units (these units resulting from compounds known as monomers). This or these unit(s) are repeated at least twice and preferably at least three times.The term “film-forming polymer” is understood to mean a polymer capable of forming, by itself alone or in the presence of an auxiliary film-forming agent, a macroscopically continuous film on a support, in particular on keratin materials, preferably a cohesive film, and better still a film, the cohesion and the mechanical properties of which are such that said film can be isolable and manipulable in isolation, for example when said film is prepared by pouring onto a non-stick surface, such as a Teflon-coated or silicone-coated surface.The term “polymer in the solid state” means the state of the polymer at ambient temperature (25°C) and atmospheric pressure (760 mmHg or 105Pa); said polymer is not present in the composition of the invention in a fluid form in the solubilized state in an organic solvent, in particular a volatile organic solvent.Preferentially, a composition according to the invention comprises from 5% to 60% by weight, more preferentially from 10% to 50% by weight, more particularly from 20% to 40% by weight, as active material of film-forming polymer(s), relative to the total weight of the composition.The film-forming polymers in accordance with the invention are preferably chosen from hydrophobic film-forming polymers.For the purposes of the present invention, the term “hydrophobic film-forming polymer” is understood to denote a film-forming polymer which is devoid of affinity for water and, as such, which does not lend itself to a formulation in the form of a solute in an aqueous medium. In particular, the term "hydrophobic polymer" is understood to mean a polymer having a solubility in water at 25°C of less than 1% by weight.In particular, the hydrophobic film-forming polymer is a polymer chosen from the group constituted of film-forming polymers which are soluble in an organic solvent medium, in particular fat-soluble polymers; this means that the polymer is soluble or miscible in the organic medium and will form a single homogeneous phase when it is incorporated in the medium.According to a particular form of the invention, the hydrophobic film-forming polymer(s) is (are) chosen from- a silicone resin;- a copolymer comprising carboxylate groups and polydimethylsiloxane groups;- a vinyl polymer comprising at least one carbosiloxane dendrimer-based unit;- an ethylene block copolymer;- a polysaccharide grafted with organosiloxane groups;- a polysaccharide ether;- a norbornene polymer grafted with organosiloxane groups;- mixtures thereof.Silicone resinsMore generally, the term “resin” means a compound of which the structure is three-dimensional. “Silicone resins” are also referred to as “siloxane resins”.The nomenclature of silicone resins (also known as siloxane resins) is known under the name “MDTQ”, the resin being described as a function of the various siloxane monomer units it comprises, each of the letters MDTQ characterizing a type of unit.The letter “M” represents the monofunctional unit of formula R1R2R3SiO1 / 2, the silicon atom being bonded to only one oxygen atom in the polymer comprising this unit.The letter “D” means a difunctional unit R1R2SiO2 / 2wherein the silicon atom is bonded to two oxygen atoms.The letter “T” represents a trifunctional unit R1Si3 / 2.Such resins are described, for example, in theEncyclopedia of Polymer Science and Engineering, vol. 15, John Wiley & Sons, New York, (1989), pp. 265-270, and US 2 676 182, US 3 627 851, US 3 772 247, US 5 248 739 or US 5 082 706, US 5 319 040, US 5 302 685 and US 4 935 484.In the units M, D and T defined previously, R, namely R1, R2 and R3, represents a hydrocarbon radical (especially alkyl) containing from 1 to 10 carbon atoms, a phenyl group, a phenylalkyl group or a hydroxyl group.Finally, the letter “Q” means a tetrafunctional unit SiO4 / 2wherein the silicon atom is bonded to four oxygen atoms, which are themselves bonded to the rest of the polymer.Various silicone resins with different properties can be obtained from these different units, the properties of these polymers varying as a function of the type of monomer (or units), of the nature and number of the R radical, of the length of the polymer chain, of the degree of branching and of the size of the pendent chains.Use may be made, as silicone resins which can be used in the compositions according to the invention, for example, of silicone resins of MQ type, of T type or of MQT type.MQ resins:Mention may be made, as examples of silicone resins of MQ type, of the alkylsiloxysilicates of formula [(R1)3SiO1 / 2]x(SiO4 / 2)y(MQ units) wherein x and y are integers ranging from 50 to 80, and such that the R1group represents a radical as defined above and is preferably an alkyl group having from 1 to 8 carbon atoms or a hydroxyl group, preferably a methyl group.As an example of MQ silicone resins, mention will be made of those with the INCI name trimethylsiloxysilicate such as those sold under the reference SR1000® by General Electric and under the reference Belsil TMS 803® by Wacker.T resins:Examples of silicone resins of type T that may be mentioned include the polysilsesquioxanes of formula (RSiO3 / 2)x(T units) wherein x is greater than 100 and such that the group R is an alkyl group containing from 1 to 10 carbon atoms, said polysilsesquioxanes also possibly comprising Si-OH end groups.Preferably, use may be made of the polymethylsilsesquioxane resins wherein R represents a methyl group, for instance those sold by Wacker under the reference Resin MK®, such as Belsil PMS MK®: a polymer comprising CH3SiO3 / 2repeat units (T units), also possibly comprising up to 1% by weight of (CH3)2SiO2 / 2units (D units) and having an average molecular weight of around 10 000 g / mol.MQT resins:Resins comprising MQT units that are notably known are those mentioned in US 5 110 890.A preferred form of resins of MQT type are MQT-propyl (also known as MQTPr) resins. Such resins that may be used in the compositions according to the invention are especially the resins described and prepared in patent application WO 2005 / 075 542.The MQ-T-propyl resin preferably comprises the units:(i) (R13SiO1 / 2)a(ii) (R22SiO2 / 2)b(iii) (R3SiO3 / 2)cand(iv) (SiO4 / 2)dR1, R2 and R3 independently representing a hydrocarbon radical (notably alkyl) containing from 1 to 10 carbon atoms, a phenyl group, a phenylalkyl group or even a hydroxyl group and preferably an alkyl radical containing from 1 to 8 carbon atoms or a phenyl group,a, b, c and d being mole fractions,a being between 0.05 and 0.5,b being between 0 and 0.3,c being greater than zero,d being between 0.05 and 0.6,a + b + c + d = 1,on condition that more than 40 mol% of the groups R3 of the siloxane resin are propyl groups.Preferably, the siloxane resin comprises the units:(i) (R13SiO1 / 2)a(ii) (R3SiO3 / 2)cand(iv) (SiO4 / 2)dwith R1 and R3 independently representing an alkyl group containing from 1 to 8 carbon atoms, R1 preferably being a methyl group and R3 preferably being a propyl group,a being between 0.05 and 0.5 and preferably between 0.15 and 0.4,c being greater than zero, preferably between 0.15 and 0.4,d being between 0.05 and 0.6, preferably between 0.2 and 0.6 or alternatively between 0.2 and 0.55,a + b + c + d = 1, and a, b, c and d being mole fractions,provided that more than 40 mol% of the R3 groups of the siloxane resin are propyl groups.The siloxane resins which can be used according to the invention can be obtained by a process comprising the reaction of:A) an MQ resin comprising at least 80 mol% of units (R13SiO1 / 2)aand (SiO4 / 2)d,R1 representing an alkyl group containing from 1 to 8 carbon atoms, an aryl group, a carbinol group or an amino group,a and d being greater than zero,the ratio a / d being between 0.5 and 1.5; andB) a propyl T resin comprising at least 80 mol% of (R3SiO3 / 2)c,units,R3 representing an alkyl group containing from 1 to 8 carbon atoms, an aryl group, a carbinol group or an amino group,c being greater than zero,on condition that at least 40 mol% of the groups R3 are propyl groups,wherein the weight ratio A / B is between 95:5 and 15:85 and preferably the weight ratio A / B is 30:70.Advantageously, the mass ratio A / B is between 95 / 5 and 15 / 85. Preferably, the ratio A / B is less than or equal to 70 / 30. These preferred ratios have proven to afford comfortable deposits.Preferably, the composition according to the invention comprises, as silicone resin, at least one resin of MQ type, more particularly of trimethylsiloxysilicate type, such as those sold under the reference SR1000® by Momentive Performance Materials and under the reference TMS 803® by Wacker.Copolymers comprising carboxylate groups and polydimethylsiloxane groupsThe expression “copolymer comprising carboxylate groups and polydimethylsiloxane groups” is understood to mean, in the present patent application, a copolymer obtained from (a) one or more carboxylic (acid or ester) monomers and (b) one or more polydimethylsiloxane (PDMS) chains.In the present patent application, the term “carboxylic monomer” means both carboxylic acid monomers and carboxylic acid ester monomers.Thus, the monomer (a) may be chosen, for example, from acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, esters thereof and mixtures of these monomers.Esters that may be mentioned include the following monomers: acrylate, methacrylate, maleate, fumarate, itaconate and / or crotonate.According to a preferred embodiment of the invention, the monomers in ester form are more particularly chosen from linear or branched, preferably C1-C24and better still C1-C22alkyl acrylates and methacrylates, the alkyl radical preferably being chosen from methyl, ethyl, stearyl, butyl and 2-ethylhexyl radicals, and mixtures thereof.Thus, according to a particular embodiment of the invention, the copolymer comprises as carboxylate groups at least one group chosen from acrylic acid and methacrylic acid, and methyl, ethyl, stearyl, butyl or 2-ethylhexyl acrylates or methacrylates, and mixtures thereof.In the present patent application, the term “polydimethylsiloxanes” (also called organopolysiloxanes or abbreviated as PDMSs) denotes, in accordance with what is generally accepted, any organosilicon polymer or oligomer of linear structure, of variable molecular weight, obtained by polymerization and / or polycondensation of suitably functionalized silanes, and constituted essentially of a repetition of main units wherein the silicon atoms are linked together via oxygen atoms (siloxane bond ºSi-O-Siº), including trimethyl radicals directly linked via a carbon atom to said silicon atoms. The PDMS chains that may be used to obtain the copolymer used according to the invention include at least one polymerizable radical group, preferably located on at least one of the ends of the chain, i.e. the PDMS may contain, for example, a polymerizable radical group on the two ends of the chain or one polymerizable radical group on one end of the chain and one trimethylsilyl end group on the other end of the chain. The polymerizable radical group may especially be an acrylic or methacrylic group, in particular a CH2=CR1-COO-R2 groupwherein R1 represents hydrogen or methyl and R2 represents-CH2-, -(CH2)n- with n = 3, 5, 8 or 10, -CH2–CH(CH3)–CH2- , -CH2-CH2-CH2-,-CH2-CH2-O-CH2-CH2-CH(CH3)-CH2-, -CH2-CH2-O-CH2-CH2-O-CH2-CH2-CH2–.The copolymers used in the composition of the invention are generally obtained according to the usual methods of polymerization and grafting, for example by free-radical polymerization (A) of a PDMS comprising at least one polymerizable radical group (for example on one of the ends of the chain or on both ends) and (B) of at least one carboxylic monomer, as described, for example, in documents US-A-5 061 481 and US-A-5 219 560.The copolymers obtained generally have a molecular weight ranging from 3000 to 200 000 and preferably from 5000 to 100 000.As copolymers that may be used in the composition of the invention, mention may be made, for example, of copolymers of acrylic acid and of stearyl acrylate bearing polydimethylsiloxane grafts, copolymers of stearyl methacrylate bearing polydimethylsiloxane grafts, copolymers of acrylic acid and of stearyl methacrylate bearing polydimethylsiloxane grafts, copolymers of methyl methacrylate, butyl methacrylate, 2-ethylhexyl acrylate and stearyl methacrylate bearing polydimethylsiloxane grafts.Mention may be made, in particular, as copolymer which can be used in the composition of the invention, of the copolymer having the INCI name Acrylates / Ethylhexyl Acrylate / Dimethicone Methacrylate, such as the commercial productKP-561® sold by Shin Etsu.Vinyl polymers grafted with a carbosiloxane dendrimerThe vinyl polymer has a backbone and at least one side chain, which side chain comprises a carbosiloxane dendrimer-based unit exhibiting a carbosiloxane dendrimer structure.In the context of the present invention, the term "carbosiloxane dendrimer structure" represents a molecular structure possessing branched groups having high molecular weights, said structure having high regularity in the radial direction starting from the bond to the backbone. Such carbosiloxane dendrimer structures are described in the form of a highly branched siloxane-silylalkylene copolymer in the laid-open Japanese patent application Kokai 9-171 154.A vinyl polymer according to the invention may contain carbosiloxane dendrimer-based units that may be represented by the following general formula (I):[Corrected under Rule 26, 16.10.2024](I)wherein:- R1represents an aryl group having from 5 to 10 carbon atoms or an alkyl group having from 1 to 10 carbon atoms;- Xirepresents a silylalkyl group which, when i = 1, is represented by formula (II):[Corrected under Rule 26, 16.10.2024](II)wherein:R1is as defined above in the formula (I),R2represents an alkylene radical having from 2 to 10 carbon atoms,R3represents an alkyl group having from 1 to 10 carbon atoms,Xi+1is chosen from: a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an aryl group having from 5 to 10 carbon atoms and a silylalkyl group defined above of formula (II),i is an integer from 1 to 10 which represents the generation of said silylalkyl group, andaiis an integer from 0 to 3;Y represents a radical-polymerizable organic group chosen from:organic groups comprising a methacrylic group or an acrylic group, said organic groups being represented by the formulae:[Corrected under Rule 26, 16.10.2024]or[Corrected under Rule 26, 16.10.2024]wherein:R4represents a hydrogen atom or an alkyl group containing from 1 to 10 carbon atoms; andR5represents an alkylene group having from 1 to 10 carbon atoms, such as a methylene group, an ethylene group, a propylene group or a butylene group, methylene and propylene groups being preferred; andorganic groups containing a styryl group of formula:[Corrected under Rule 26, 16.10.2024]wherein:R6represents a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms, such as a methyl group, an ethyl group, a propyl group or a butyl group, the methyl group being preferred;R7represents an alkyl group having from 1 to 10 carbon atoms;R8represents an alkylene group having from 1 to 10 carbon atoms, such as a methylene group, an ethylene group, a propylene group or a butylene group, the ethylene group being preferred;b is an integer from 0 to 4; andc is 0 or 1, so that, if c is 0, -(R8)c- represents a bond.According to one embodiment, R1can represent an aryl group possessing from 5 to 10 carbon atoms or an alkyl group possessing from 1 to 10 carbon atoms. The alkyl group can preferably be represented by a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, an isopropyl group, an isobutyl group, a cyclopentyl group or a cyclohexyl group. The aryl group can preferably be represented by a phenyl group and a naphthyl group. The methyl and phenyl groups are more particularly preferred, and the methyl group is most preferred.According to one embodiment, R2represents an alkylene group containing from 2 to 10 carbon atoms, in particular a linear alkylene group, such as an ethylene, propylene, butylene or hexylene group; or a branched alkylene group, such as a methylmethylene, methylethylene, 1-methylpentylene or 1,4-dimethylbutylene group. The ethylene, methylethylene, hexylene, 1-methylpentylene and 1,4-dimethylbutylene groups are most preferred.According to one embodiment, R3is chosen from methyl, ethyl, propyl, butyl and isopropyl groups.In the formula (II), i indicates the number of generations and thus corresponds to the number of repetitions of the silylalkyl group.For example, when the number of generations is equal to one, the carbosiloxane dendrimer can be represented by the general formula below:[Corrected under Rule 26, 16.10.2024]wherein Y, R1, R2and R3are as defined above, R12represents a hydrogen atom or is identical to R1; a1is identical to ai. Preferably, the total mean number of groups OR3in a molecule is within the range from 0 to 7.When the number of generations is equal to 2, the carbosiloxane dendrimer can be represented by the general formula below:[Corrected under Rule 26, 16.10.2024]wherein Y, R1, R2, R3and R12are the same as defined above; a1and a2represent the aiof the generation indicated. Preferably, the total average number of OR3groups in a molecule is within the range from 0 to 25.In the case wherein the number of generations is equal to 3, the carbosiloxane dendrimer is represented by the general formula below:[Corrected under Rule 26, 16.10.2024]wherein Y, R1, R2, R3and R12are the same as defined above; a1, a2and a3represent the aiof the generation indicated. Preferably, the total average number of OR3groups in a molecule is within the range from 0 to 79.A vinyl polymer containing at least one carbosiloxane dendrimer-based unit has a molecular side chain containing a carbosiloxane dendrimer structure, and may be the product of polymerization of:(A) from 0 to 99.9 parts by weight of a vinyl monomer; and(B) from 100 to 0.1 parts by weight of a carbosiloxane dendrimer containing a radical-polymerizable organic group, represented by general formula (I) as defined above.The monomer of vinyl type which is the component (A) in the vinyl polymer having at least one carbosiloxane dendrimer-based unit is a monomer of vinyl type which comprises a radically polymerizable vinyl group. There is no particular limitation as regards such a monomer.The following are examples of this monomer of vinyl type: methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate or a methacrylate of an analogous lower alkyl; glycidyl methacrylate; butyl methacrylate, butyl acrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-hexyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, octyl methacrylate, lauryl methacrylate, stearyl acrylate, stearyl methacrylate or a higher-analogue methacrylate; vinyl acetate, vinyl propionate or a vinyl ester of an analogous lower fatty acid; vinyl caproate, vinyl 2-ethylhexoate, vinyl laurate, vinyl stearate or an ester of a higher fatty acid analogue; styrene, vinyltoluene, benzyl methacrylate, phenoxyethyl methacrylate, vinylpyrrolidone or similar vinylaromatic monomers; methacrylamide, N-methylolmethacrylamide, N-methoxymethylmethacrylamide, isobutoxymethoxymethacrylamide, N,N-dimethylmethacrylamide or similar monomers of vinyl type containing amide groups; hydroxyethyl methacrylate, hydroxypropyl alcohol methacrylate or similar monomers of vinyl type containing hydroxyl groups; acrylic acid, methacrylic acid, itaconic acid, crotonic acid, fumaric acid, maleic acid or similar monomers of vinyl type containing a carboxylic acid group; tetrahydrofurfuryl methacrylate, butoxyethyl methacrylate, ethoxydiethylene glycol methacrylate, polyethylene glycol methacrylate, polypropylene glycol monomethacrylate, hydroxybutyl vinyl ether, cetyl vinyl ether, 2-ethylhexyl vinyl ether or a similar monomer of vinyl type with ether bonds; methacryloxypropyltrimethoxysilane, polydimethylsiloxane containing a methacrylic group on one of its molecular ends, polydimethylsiloxane containing a styryl group on one of its molecular ends, or a similar silicone compound containing unsaturated groups; butadiene; vinyl chloride; vinylidene chloride; methacrylonitrile; dibutyl fumarate; anhydrous maleic acid; anhydrous succinic acid; methacryl glycidyl ether; an organic salt of an amine, an ammonium salt, and an alkali metal salt of methacrylic acid, of itaconic acid, of crotonic acid, of maleic acid or of fumaric acid; a radical-polymerizable unsaturated monomer containing a sulfonic acid group such as a styrenesulfonic acid group; a quaternary ammonium salt derived from methacrylic acid, such as 2-hydroxy-3-methacryloxypropyltrimethylammonium chloride; and a methacrylic acid ester of an alcohol containing a tertiary amine group, such as a methacrylic acid ester of diethylamine.Multifunctional monomers of vinyl type may also be used.The following represent examples of such compounds: trimethylolpropane trimethacrylate, pentaerythrityl trimethacrylate, ethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, 1,4-butanediol dimethacrylate, 1,6-hexanediol dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropanetrioxyethyl methacrylate, tris(2-hydroxyethyl)isocyanurate dimethacrylate, tris(2-hydroxyethyl)isocyanurate trimethacrylate, polydimethylsiloxane capped with styryl groups containing divinylbenzene groups on both ends, or similar silicone compounds containing unsaturated groups.A carbosiloxane dendrimer, which is the component (B), can be represented by the formula (I) as defined above.The following represent the preferred examples of Y group of the formula (I): an acryloyloxymethyl group, a 3-acryloyloxypropyl group, a methacryloyloxymethyl group, a 3-methacryloyloxypropyl group, a 4-vinylphenyl group, a 3-vinylphenyl group, a 4-(2-propenyl)phenyl group, a 3-(2-propenyl)phenyl group, a 2-(4-vinylphenyl)ethyl group, a 2-(3-vinylphenyl)ethyl group, a vinyl group, an allyl group, a methallyl group and a 5-hexenyl group.[Corrected under Rule 26, 16.10.2024]A carbosiloxane dendrimer according to the present invention may be represented by the formulae having the average structures below:[Corrected under Rule 26, 16.10.2024]Thus, according to one embodiment, the carbosiloxane dendrimer of the composition according to the present invention is represented by the following formula:wherein:Y, R1, R2and R3are as defined in the formulae (I) and (II) above;a1, a2and a3correspond to the definition of aiaccording to formula (II); andR12is H, an aryl group having from 5 to 10 carbon atoms or an alkyl group having from 1 to 10 carbon atoms.[Corrected under Rule 26, 16.10.2024]According to one embodiment, the carbosiloxane dendrimer of the composition according to the present invention is represented by one of the following formulae:The vinyl polymer comprising the carbosiloxane dendrimer according to the invention may be manufactured according to the process for manufacturing a branched silalkylene siloxane described in Japanese patent application Hei 9-171 154.For example, it may be produced by subjecting an organosilicon compound containing a hydrogen atom linked to a silicon atom, represented by the following general formula (IV):[Corrected under Rule 26, 16.10.2024](IV)wherein R1is as defined above in formula (I),and an organosilicon compound that contains an alkenyl group.In the above formula, the organosilicon compound can be represented by (3-methacryloyloxypropyl)tris(dimethylsiloxy)silane, (3-acryloyloxypropyl)tris(dimethylsiloxy)silane and (4-vinylphenyl)tris(dimethylsiloxy)silane. The organosilicon compound containing an alkenyl group may be vinyltris(trimethylsiloxy)silane, vinyltris(dimethylphenylsiloxy)silane, and 5-hexenyltris(trimethylsiloxy)silane.The hydrosilylation reaction is performed in the presence of a chloroplatinic acid, a complex of vinylsiloxane and of platinum, or a similar transition metal catalyst.A vinyl polymer bearing at least one carbosiloxane dendrimer-based unit may be chosen from polymers such that the carbosiloxane dendrimer-based unit is a carbosiloxane dendritic structure represented by formula (III) below:[Corrected under Rule 26, 16.10.2024](III)wherein Z is a divalent organic group, "p" is 0 or 1, R1is as defined above in formula (IV) and Xiis a silylalkyl group represented by formula (II) as defined above.In a vinyl polymer having at least one carbosiloxane dendrimer-based unit, the polymerization ratio of the component (A) to the component (B), in terms of the ratio by weight of (A) to (B), is within a range from 0 / 100 to 99.9 / 0.1, indeed even from 0.1 / 99.9 to 99.9 / 0.1 and preferably within a range from 1 / 99 to 99 / 1. A ratio of the component (A) to the component (B) of 0 / 100 means that the compound becomes a homopolymer of component (B).A vinyl polymer having at least one carbosiloxane dendrimer-based unit can be obtained by the copolymerization of the components (A) and (B) or by the polymerization of the component (B) alone.The polymerization can be a radical polymerization or an ionic polymerization; however, the radical polymerization is preferred.The polymerization may be performed by bringing about a reaction between the components (A) and (B) in a solution for a period of from 3 to 20 hours in the presence of a radical initiator at a temperature of from 50°C to 150°C.A suitable solvent for this purpose is hexane, octane, decane, cyclohexane or a similar aliphatic hydrocarbon; benzene, toluene, xylene or a similar aromatic hydrocarbon; diethyl ether, dibutyl ether, tetrahydrofuran, dioxane or ethers; acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone or similar ketones; methyl acetate, ethyl acetate, butyl acetate, isobutyl acetate or similar esters; methanol, ethanol, isopropanol, butanol or similar alcohols; octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, hexamethyldisiloxane, octamethyltrisiloxane or a similar organosiloxane oligomer.A radical initiator may be any compound known in the art for standard free-radical polymerization reactions. The specific examples of such radical initiators are 2,2’-azobis(isobutyronitrile), 2,2’-azobis(2-methylbutyronitrile), 2,2’-azobis(2,4-dimethylvaleronitrile) or similar compounds of azobis type; benzoyl peroxide, lauroyl peroxide, tert-butyl peroxybenzoate, tert-butyl peroxy-2-ethylhexanoate or a similar organic peroxide. These radical initiators can be used alone or in a combination of two or more. The radical initiators can be used in an amount of 0.1 to 5 parts by weight per 100 parts by weight of the components (A) and (B). A chain-transfer agent can be added. The chain-transfer agent can be 2-mercaptoethanol, butyl mercaptan, n-dodecyl mercaptan, (3-mercaptopropyl)trimethoxysilane, a polydimethylsiloxane possessing a mercaptopropyl group or an analogous compound of mercapto type; methylene chloride, chloroform, carbon tetrachloride, butyl bromide, (3-chloropropyl)trimethoxysilane or an analogous halogenated compound.In the manufacture of the polymer of vinyl type, after the polymerization, the unreacted residual vinyl monomer may be removed under conditions of heating under vacuum.To facilitate the preparation of starting material for cosmetic products, the number-average molecular weight of the vinyl polymer which comprises a carbosiloxane dendrimer can be chosen within the range between 3000 and 2 000 000 and preferably between 5000 and 800 000. It may be a liquid, gum, paste, solid, powder, or any other form. The preferred forms are solutions constituted of the dilution of a dispersion or of a powder in solvents.A vinyl polymer that is suitable for use in the invention may also be one of the polymers described in the examples of patent application EP 0 963 751.According to a preferred embodiment, a vinyl polymer grafted with a carbosiloxane dendrimer may be the product of polymerization of:- 0 to 99.9 parts by weight of one or more acrylate or methacrylate monomer(s); and- 100 to 0.1 parts by weight of an acrylate or methacrylate monomer of a tri[tri(trimethylsiloxy)silylethyldimethylsiloxy]silylpropyl carbosiloxane dendrimer.The monomers (A1) and (B1) correspond respectively to specific monomers (A) and (B).[Corrected under Rule 26, 16.10.2024]According to one embodiment, a vinyl polymer bearing at least one carbosiloxane dendrimer-based unit may comprise a tris[tri(trimethylsiloxy)silylethyldimethylsiloxy]silylpropyl carbosiloxane dendrimer-based unit corresponding to one of the formulae:According to one preferred mode, a vinyl polymer bearing at least one carbosiloxane dendrimer-based unit used in the invention comprises at least one butyl acrylate monomer.According to one embodiment, a vinyl polymer may also comprise at least one fluoro organic group. A fluorinated vinyl polymer may be one of the polymers described in the examples of patent application WO 03 / 045 337.The vinyl polymers grafted with at least one carbosiloxane dendrimer-based unit which may be particularly suitable for the present invention are those having the INCI name: Acrylates / Polytrimethylsiloxymethacrylate and corresponding to the solid state polymer of the commercial products Dowsil FA 4002 ID Silicone Acrylate® and Dowsil FA 4004 ID Silicone Acrylate® sold by Dow Corning.Block ethylenic copolymersAccording to a preferential form, the block ethylenic copolymer (also referred to as block ethylene polymer) in accordance with the invention contains at least one first block with a glass transition temperature (Tg) of greater than or equal to 40°C and being totally or partly derived from one or more first monomers, which are such that the homopolymer prepared from these monomers has a glass transition temperature of greater than or equal to 40°C, and at least one second block with a glass transition temperature of less than or equal to 20°C and being derived totally or partly from one or more second monomers, which are such that the homopolymer prepared from these monomers has a glass transition temperature of less than or equal to 20°C, said first block and said second block being connected together via a statistical intermediate segment comprising at least one of said first constituent monomers of the first block and at least one of said second constituent monomers of the second block, and said block copolymer having a polydispersity index I of greater than 2.The block polymer used according to the invention thus comprises at least one first block and at least one second block.The term “at leastone block” means one or more blocks.The term “block” polymer means a polymer comprising at least two different blocks and preferably at least three different blocks.The term “ethylenic polymer” means a polymer obtained by polymerization of ethylenically unsaturated monomers.The block ethylenic polymer used according to the invention is prepared exclusively from monofunctional monomers.This means that the block ethylenic polymer used according to the present invention does not contain any multifunctional monomers, which make it possible to break the linearity of a polymer so as to obtain a branched or even crosslinked polymer, as a function of the content of multifunctional monomer. The polymer used according to the invention does not, either, contain any macromonomers (the term “macromonomer” means a monofunctional monomer containing a pendent group of polymeric nature, and preferably having a molecular mass of greater than 500 g / mol, or alternatively a polymer including on only one of its ends a polymerizable (or ethylenically unsaturated) end group), which are used in the preparation of a grafted polymer.It is pointed out that, in the text hereinabove and hereinbelow, the terms “first” and “second” blocks do not in any way condition the order of said blocks in the structure of the polymer.The first block and the second block of the polymer used in the invention may be advantageously mutually incompatible.The term “mutually incompatible blocks” means that the mixture formed from a polymer corresponding to the first block and from a polymer corresponding to the second block is not miscible in the polymerization solvent that is in major amount by weight for the block polymer, at ambient temperature (25°C) and atmospheric pressure (105Pa), for a content of the mixture of said polymers of greater than or equal to 5% by weight, relative to the total weight of the mixture of said polymers and of said polymerization solvent, it being understood that:i) said polymers are present in the mixture in a content such that the respective weight ratio ranges from 10 / 90 to 90 / 10, and thatii) each of the polymers corresponding to the first and second blocks has an average (weight-average or number-average) molar mass equal to that of the block polymer ± 15%.In the case of a mixture of polymerization solvents, and in the event that two or more solvents are present in identical mass proportions, said polymer mixture is immiscible in at least one of them.Needless to say, in the case of a polymerization performed in a single solvent, this solvent is the solvent that is in major amount.The block polymer according to the invention comprises at least a first block and at least a second block that are connected together via an intermediate segment comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block. The intermediate segment (also known as the intermediate block) has a glass transition temperature Tg that is between the glass transition temperatures of the first and second blocks.The intermediate segment is a block comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block of the polymer allowing these blocks to be “compatibilized”.Advantageously, the intermediate segment comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block of the polymer is a statistical polymer.Preferably, the intermediate block is derived essentially from constituent monomers of the first block and of the second block.The term “essentially” means at least 85%, preferably at least 90%, better still 95% and even better still 100%.The term “ethylenic polymer” means a polymer obtained by polymerization of ethylenically unsaturated monomers.Preferentially, the polymer according to the invention does not comprise any silicon atoms in its backbone.The term “backbone” means the main chain of the polymer, as opposed to the pendent side chains.Preferably, the polymer according to the invention is not water-soluble, i.e. the polymer is not soluble in water or in a mixture of water and linear or branched lower monoalcohols containing from 2 to 5 carbon atoms, for instance ethanol, isopropanol or n-propanol, without modifying the pH, at an active material content of at least 1% by weight, at ambient temperature (25°C).Preferably, the polymer according to the invention is not an elastomer.The term “non-elastomeric polymer” means a polymer which, when it is subjected to a constraint intended to pull it (for example by 30% relative to its initial length), does not return to a length substantially identical to its initial length when the constraint ceases.The polydispersity index of the polymer of the invention is greater than 2.Advantageously, the block polymer used in the compositions according to the invention has a polydispersity index I of greater than 2, for example ranging from 2 to 9, preferably greater than or equal to 2.5, for example ranging from 2.5 to 8 and better still greater than or equal to 2.8, and in particular ranging from 2.8 to 6.The polydispersity index I of the polymer is equal to the ratio of the weight-average mass Mw to the number-average mass Mn.The weight-average molar mass (Mw) and number-average molar mass (Mn) are determined by gel permeation liquid chromatography (THF solvent, calibration curve established with linear polystyrene standards, refractometric detector).The weight-average mass (Mw) of the polymer according to the invention is preferably less than or equal to 300 000 g / mol; it ranges, for example, from 35 000 to 200 000 g / mol and better still from 45 000 to 150 000 g / mol.The number-average mass (Mn) of the polymer according to the invention is preferably less than or equal to 70 000 g / mol; it ranges, for example, from 10 000 to 60 000 g / mol and better still from 12 000 to 50 000 g / mol.Preferably, the polydispersity index of the polymer according to the invention is greater than 2, for example ranging from 2 to 9, preferably greater than or equal to 2.5, for example ranging from 2.5 to 8, and better still greater than or equal to 2.8, and notably ranging from 2.8 to 6.First block with a Tg of greater than or equal to 40°CThe block with a Tg of greater than or equal to 40°C has, for example, a Tg ranging from 40 to 150°C, preferably greater than or equal to 50°C, for example ranging from 50°C to 120°C and better still greater than or equal to 60°C, for example ranging from 60°C to 120°C.The glass transition temperatures indicated for the first and second blocks may be theoretical Tg values determined from the theoretical Tg values of the constituent monomers of each of the blocks, which may be found in a reference manual such as the Polymer Handbook, 3rd Edition, 1989, John Wiley, according to the following relationship, known as Fox’s law:[Math 2]1 / Tg = Σ (ωi / Tgi),i being the mass fraction of monomer i in the block under consideration and Tgi being the glass transition temperature of the homopolymer of the monomer i.Unless otherwise indicated, the Tg values indicated for the first and second blocks in the present patent application are theoretical Tg values.The difference between the glass transition temperatures of the first and second blocks is generally greater than 10°C, preferably greater than 20°C and better still greater than 30°C.The block with a Tg of greater than or equal to 40°C may be a homopolymer or a copolymer.The block with a Tg of greater than or equal to 40°C may be derived totally or partially from one or more monomers which are such that the homopolymer prepared from these monomers has a glass transition temperature of greater than or equal to 40°C. This block may also be referred to as a “rigid block”.In the case where this block is a homopolymer, it is derived from monomers which are such that the homopolymers prepared from these monomers have glass transition temperatures of greater than or equal to 40°C. This first block may be a homopolymer constituted of only one type of monomer (for which the Tg of the corresponding homopolymer is greater than or equal to 40°C).In the case where the first block is a copolymer, it may be totally or partially derived from one or more monomers, the nature and concentration of which are chosen such that the Tg of the resulting copolymer is greater than or equal to 40°C. The copolymer may comprise, for example:- monomers which are such that the homopolymers prepared from these monomers have Tg values of greater than or equal to 40°C, for example a Tg ranging from 40°C to 150°C, preferably greater than or equal to 50°C, for example ranging from 50°C to 120°C,- monomers which are such that the homopolymers prepared from these monomers have Tg values of less than 40°C, chosen from monomers with a Tg of between 20°C and 40°C and / or monomers with a Tg of less than or equal to 20°C, for example a Tg ranging from -100°C to 20°C, preferably less than 15°C, notably ranging from -80°C to 15°C and better still less than 10°C, for example ranging from -50°C to 0°C, as described later.The first monomers of which the homopolymers have a glass transition temperature of greater than or equal to 40°C are chosen, preferably, from the following monomers, also known as the main monomers:- the methacrylates of formula CH2 = C(CH3)-COOR1,wherein R1represents a linear or branched unsubstituted alkyl group containing from 1 to 4 carbon atoms, such as a methyl, ethyl, propyl or isobutyl group or R1represents a C4to C12cycloalkyl group, preferably a C8to C12cycloalkyl, such as isobornyl methacrylate,- the acrylates of formula CH2 = CH-COOR2wherein R2represents a C4to C12cycloalkyl group such as an isobornyl group or a tert-butyl group,- (meth)acrylamides of formula:[Corrected under Rule 26, 16.10.2024]wherein:R7and R8, which may be identical or different, each represent a hydrogen atom or a linear or branched C1 to C12 alkyl group such as an n-butyl, t-butyl, isopropyl, isohexyl, isooctyl or isononyl group; or R7represents H and R8represents a 1,1-dimethyl-3-oxobutyl group,R’ denotes H or methyl.Examples of monomers that may be mentioned include N-butylacrylamide, N-tert-butylacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide and N,N-dibutylacrylamide, and mixtures thereof.The first block is advantageously obtained from at least one acrylate monomer of formula CH2=CH-COOR2and from at least one methacrylate monomer of formula CH2=C(CH3)-COOR2wherein R2represents a C4to C12cycloalkyl group, preferably a C8to C12cycloalkyl, such as isobornyl. The monomers and the proportions thereof are preferably chosen such that the glass transition temperature of the first block is greater than or equal to 40°C.According to one embodiment, the first block is obtained from:i) at least one acrylate monomer of formula CH2=CH-COOR2wherein R2represents a C4to C12cycloalkyl group, preferably a C8to C12cycloalkyl group, such as isobornyl,ii) and at least one methacrylate monomer of formula CH2 = C(CH3)-COOR'2wherein R'2represents a C4to C12cycloalkyl group, preferably a C8to C12cycloalkyl group, such as isobornyl.According to one embodiment, the first block is obtained from at least one acrylate monomer of formula CH2=CH-COOR2wherein R2represents a C8to C12cycloalkyl group, such as isobornyl, and from at least one methacrylate monomer of formula CH2=C(CH3)-COOR'2wherein R'2represents a C8to C12cycloalkyl group, such as isobornyl.Preferably, R2and R'2represent, independently or simultaneously, an isobornyl group.Preferably, the block copolymer comprises from 50% to 80% by weight of isobornyl methacrylate / acrylate, from 10% to 30% by weight of isobutyl acrylate and from 2% to 10% by weight of acrylic acid.The first block may be obtained exclusively from said acrylate monomer and from said methacrylate monomer.The acrylate monomer and the methacrylate monomer are preferably in mass proportions of between 30 / 70 and 70 / 30, preferably between 40 / 60 and 60 / 40 and especially of the order of 50 / 50.The proportion of the first block advantageously ranges from 20% to 90%, better still from 30% to 80% and even better still from 60% to 80% by weight of the polymer.According to one embodiment, the first block is obtained by polymerization of isobornyl methacrylate and isobornyl acrylate.Second block with a glass transition temperature of less than 20°CThe second block advantageously has a glass transition temperature Tg of less than or equal to 20°C, for example, a Tg ranging from -100°C to 20°C, preferably less than or equal to 15°C, notably ranging from -80°C to 15°C and better still less than or equal to 10°C, for example ranging from -100°C to 10°C, notably ranging from -30°C to 10°C.The second block is totally or partially derived from one or more second monomers, which are such that the homopolymer prepared from these monomers has a glass transition temperature of less than or equal to 20°C.This block may also be referred to as a “flexible block”.The monomer with a Tg of less than or equal to 20°C (known as the second monomer) is preferably chosen from the following monomers:- the acrylates of formula CH2=CHCOOR3, with R3representing a linear or branched unsubstituted C1to C12alkyl group, with the exception of the tert-butyl group, wherein one or more heteroatoms chosen from O, N and S are optionally intercalated,- the methacrylates of formula CH2=C(CH3)-COOR4, R4representing a linear or branched unsubstituted C6to C12alkyl group, wherein one or more heteroatoms chosen from O, N and S are optionally intercalated,- the vinyl esters of formula R5-CO-O-CH=CH2wherein R5represents a linear or branched C4to C12alkyl group,- ethers of vinyl alcohol and of a C4to C12alcohol,- N-(C4to C12)alkyl acrylamides, such as N-octylacrylamide,- and mixtures thereof.The preferred monomers with a Tg of less than or equal to 20°C are isobutyl acrylate, 2-ethylhexyl acrylate or mixtures thereof in all proportions.Each of the first and second blocks may contain in small proportion at least one constituent monomer of the other block.Thus, the first block may contain at least one constituent monomer of the second block, and vice versa.Each of the first and / or second blocks may comprise, in addition to the monomers indicated above, one or more other monomers known as additional monomers, which are different than the main monomers mentioned previously.The nature and amount of this or these additional monomer(s) are chosen such that the block wherein they are present has the desired glass transition temperature.This additional monomer is chosen, for example, from:- ethylenically unsaturated monomers comprising at least one tertiary amine function, for instance 2-vinylpyridine, 4-vinylpyridine, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate and dimethylaminopropylmethacrylamide, and salts thereof,- the methacrylates of formula CH2=C(CH3)-COOR6, wherein R6represents a linear or branched alkyl group containing from 1 to 4 carbon atoms, such as a methyl, ethyl, propyl or isobutyl group, said alkyl group being substituted with one or more substituents chosen from hydroxyl groups (for instance 2-hydroxypropyl methacrylate and 2-hydroxyethyl methacrylate) and halogen atoms (Cl, Br, I and F), such as trifluoroethyl methacrylate,- the methacrylates of formula CH2=C(CH3)-COOR9, R9representing a linear or branched C6to C12alkyl group, wherein one or more heteroatoms chosen from O, N and S are optionally intercalated, said alkyl group being substituted with one or more substituents chosen from hydroxyl groups and halogen atoms (Cl, Br, I and F),- the acrylates of formula CH2=CHCOOR10, R10representing a linear or branched C1to C12alkyl group substituted with one or more substituents chosen from hydroxyl groups and halogen atoms (Cl, Br, I and F), such as 2-hydroxypropyl acrylate and 2-hydroxyethyl acrylate, or R10represents a C1to C12alkyl-O-POE (polyoxyethylene) with repetition of the oxyethylene unit 5 to 10 times, for example methoxy-POE, or R8represents a polyoxyethylenated group comprising from 5 to 10 ethylene oxide units.In particular, the first block may comprise as additional monomer:- (meth)acrylic acid, preferably acrylic acid,- tert-butyl acrylate,- the methacrylates of formula CH2=C(CH3)-COOR1, wherein R1represents a linear or branched unsubstituted alkyl group containing from 1 to 4 carbon atoms, such as a methyl, ethyl, propyl or isobutyl group,[Corrected under Rule 26, 16.10.2024]- (meth)acrylamides of formula:wherein:R7and R8, which may be identical or different, each represent a hydrogen atom or a linear or branched C1 to C12 alkyl group such as an n-butyl, t-butyl, isopropyl, isohexyl, isooctyl or isononyl group; or R7represents H and R8represents a 1,1-dimethyl-3-oxobutyl group,R’ denotes H or methyl.Examples of (meth)acrylamide monomers that may be mentioned include N-butylacrylamide, N-tert-butylacrylamide, N-isopropylacrylamide, N,N-dimethylacrylamide and N,N-dibutylacrylamide, and mixtures thereof.The additional monomer may represent 0.5% to 30% by weight relative to the weight of the polymer. According to one embodiment, the polymer of the invention does not contain any additional monomer.Preferably, the polymer of the invention comprises at least isobornyl acrylate and isobornyl methacrylate monomers in the first block and isobutyl acrylate and acrylic acid monomers in the second block.Preferably, the polymer comprises at least one of the isobornyl acrylate and isobornyl methacrylate monomers in equivalent weight proportion in the first block and isobutyl acrylate and acrylic acid monomers in the second block.Preferably, the polymer comprises at least isobornyl acrylate and isobornyl methacrylate monomers in equivalent weight proportion in the first block, and isobutyl acrylate and acrylic acid monomers in the second block, the first block representing 70% of the weight of the polymer.Preferably, the polymer comprises at least isobornyl acrylate and isobornyl methacrylate monomers in equivalent weight proportion in the first block and isobutyl acrylate and acrylic acid monomers in the second block. Preferably, the block with a Tg of greater than 40°C represents 70% by weight of the polymer, and acrylic acid represents 5% by weight of the polymer.According to one embodiment, the first block does not comprise any additional monomer.According to a preferred embodiment, the second block comprises acrylic acid as additional monomer. In particular, the second block is advantageously obtained from an acrylic acid monomer and from at least one other monomer with a Tg of less than or equal to 20°C.According to a preferred embodiment, the composition according to the invention comprises at least one copolymer comprising at least one acrylate monomer of formula CH2= CH-COOR2wherein R2represents a C8to C12cycloalkyl group and / or at least one methacrylate monomer of formula CH2=C(CH3)-COOR’2wherein R’2represents a C8to C12cycloalkyl group, at least one second acrylate monomer of formula CH2=CHCOOR3, wherein R3represents a linear or branched unsubstituted C1to C12alkyl group, with the exception of the tert-butyl group, and at least one acrylic acid monomer.Preferably, the copolymer used in the compositions according to the invention is obtained from at least one isobornyl methacrylate monomer, at least one isobornyl acrylate monomer, at least one isobutyl acrylate monomer and at least one acrylic acid monomer; in particular, it is chosen from the polymers having the INCI name Acrylic Acid / Isobutyl Acrylate / Isobornyl Acrylate copolymer in their solid form, such as those of the commercial products Mexomer PAS® and Mexomer PAZ® produced and sold by Noveal.Preferably, the copolymer used in the invention comprises from 50% to 80% by weight of isobornyl methacrylate / acrylate mixture, from 10% to 30% by weight of isobutyl acrylate and from 2% to 10% by weight of acrylic acid.The block copolymer may advantageously comprise more than 2% by weight of acrylic acid monomers, and notably from 2% to 15% by weight, for example from 3% to 15% by weight, in particular from 4% to 15% by weight or even from 4% to 10% by weight of acrylic acid monomers, relative to the total weight of said copolymer.The constituent monomers of the second block and the proportions thereof are chosen such that the glass transition temperature of the second block is less than or equal to 20°C.Intermediate segmentThe intermediate segment (also known as the intermediate block) connects the first block and the second block of the polymer used according to the present invention. The intermediate segment results from the polymerization:i) of the first monomer(s), and optionally of the additional monomer(s), which remain available after their polymerization to a maximum degree of conversion of 90% to form the first block,ii) and of the second monomer(s), and optionally of the additional monomer(s), added to the reaction mixture.The formation of the second block is initiated when the first monomers no longer react or are no longer incorporated into the polymer chain either because they are all consumed or because their reactivity no longer allows them to be.Thus, the intermediate segment comprises the first available monomers, resulting from a degree of conversion of these first monomers of less than or equal to 90%, during the introduction of the second monomer(s) during the synthesis of the polymer.The intermediate segment of the block polymer is a statistical polymer (which may also be referred to as a statistical block). This means that it comprises a statistical distribution of the first monomer(s) and of the second monomer(s) and also of the additional monomer(s) that may be present.Thus, the intermediate segment is a statistical block, as are the first block and the second block if they are not homopolymers (i.e. if they are both formed from at least two different monomers).Process for preparing the copolymer:The block ethylenic copolymer according to the invention is prepared by free radical polymerization, according to the techniques that are well known for this type of polymerization.The free radical polymerization is performed in the presence of an initiator, the nature of which is adapted, in a known manner, as a function of the desired polymerization temperature and of the polymerization solvent. In particular, the initiator may be chosen from initiators bearing a peroxide function, redox couples or other free radical polymerization initiators known to a person skilled in the art.In particular, examples of initiators bearing a peroxide function that may be mentioned include:a) peroxyesters such as tert-butyl peroxyacetate, tert-butyl perbenzoate, tert-butyl peroxy-2-ethylhexanoate (Trigonox 21S® from AkzoNobel) or 2,5-bis(2-ethylhexanoylperoxy)-2,5-dimethylhexane (Trigonox 141® from AkzoNobel);b) peroxydicarbonates such as diisopropyl peroxydicarbonate;c) peroxy ketones such as methyl ethyl ketone peroxide;d) hydroperoxides such as aqueous hydrogen peroxide solution (H2O2) or tert-butyl hydroperoxide;e) diacyl peroxides such as acetyl peroxide or benzoyl peroxide;f) dialkyl peroxides such as di-tert-butyl peroxide;g) mineral peroxides such as potassium peroxodisulfate (K2S2O8).As initiator in the form of a redox couple, mention may be made of the potassium thiosulfate + potassium peroxodisulfate couple, for example.According to a preferred embodiment, the initiator is chosen from organic peroxides comprising from 8 to 30 carbon atoms. Preferably, the initiator used is 2,5-bis(2-ethylhexanoylperoxy)-2,5-dimethylhexane sold under the reference Trigonox® 141 by AkzoNobel.The block copolymer used according to the invention is prepared by free radical polymerization and not by controlled or living polymerization. In particular, the polymerization of the block ethylenic copolymer is performed in the absence of control agents, and in particular in the absence of control agents conventionally used in living or controlled polymerization processes, such as nitroxides, alkoxyamines, dithioesters, dithiocarbamates, dithiocarbonates or xanthates, trithiocarbonates or copper-based catalysts, for example.Block copolymers such as those described previously are notably described in patent applications EP-A-1411069 and EP-A-1882709.The synthetic solvent used for the polymerization of the film-forming copolymer is generally chosen from volatile oils with a flash point below 80°C, for instance isododecane.Polysaccharides grafted with organosiloxane groupsAmong the polysaccharides grafted with organosiloxane groups, mention may be made of the polysaccharides obtained by reaction ofa) a polysaccharide withb) an organopolysiloxane comprising an isocyanate group of formula (1) below:[Corrected under Rule 26, 16.10.2024]wherein R1, R2, R3and R4independently represent a radical chosen from an alkyl group having from 1 to 8 carbon atoms, a fluoroalkyl group having from 1 to 8 carbon atoms and an aryl group having from 6 to 12 carbon atoms; n is an integer from 1 to 10 and a is an integer from 0 to 3; andc) an organic compound comprising an isocyanate group of formula (2) below:[Corrected under Rule 26, 16.10.2024]wherein R5represents an alkyl group having from 3 to 30 carbon atoms, an aryl group having from 6 to 12 carbon atoms or an aralkyl group having from 6 to 30 carbon atoms or a group of formula (3) below:[Corrected under Rule 26, 16.10.2024]wherein R6represents a divalent hydrocarbon group having from 2 to 8 carbon atoms; R7is an alkyl group having from 1 to 30 carbon atoms; X denotes an -NHCONH or NHCOO- group.The polysaccharide is preferably chosen from pullulans, celluloses, chitins, chitosans, starches, mannans, hyaluronic acid and forms thereof modified by alkylation, acylation, cationization or addition of a polyoxyalkylenated chain. More particularly, it is chosen from a pullulan or a cellulose, in particular a hydroxypropylcellulose.The organopolysiloxane comprising an isocyanate group of formula (1) is preferably chosen from the compound having the formula below:[Corrected under Rule 26, 16.10.2024][Corrected under Rule 26, 16.10.2024]The organic compound comprising an isocyanate group of formula (2) is preferably chosen from stearyl isocyanate or a compound having the structureThese polysaccharides grafted with organosiloxane groups and also the synthesis thereof are described in patents EP 2647366B1 and KR10-1666267B1 and application WO2023 / 068123.Among the polysaccharides grafted with organosiloxane groups, use will be made of the polymer having the INCI name Trimethylsiloxysilylcarbamoyl Pullulan in the solid state, such as that in the product sold under the trade name TSPL-30-ID® or the product TSPL-30-D5® by Shin Etsu.Polysaccharide ethersThe term "polysaccharide ether" is understood to mean an alkylpolysaccharide of which the alkyl group comprises from 1 to 30, preferably from 2 to 10, more preferentially from 2 to 6 carbon atoms.Preferably, the alkylpolysaccharides according to the invention are cellulose derivatives, pullulan derivatives or guar derivatives, or mixtures thereof.According to a particular embodiment, the alkylpolysaccharide(s) are chosen from alkyl celluloses of which the linear or branched alkyl group comprises from 1 to 20 carbon atoms, in particular from 2 to 15 carbon atoms.The alkylcellulose is a cellulose alkyl ether comprising a chain formed from β-anhydroglucose units linked together via acetal bonds. Each anhydroglucose unit contains three replaceable hydroxyl groups, all or some of these hydroxyl groups being able to react according to the following reaction:Cell-OM + R-Hal Cell-OR + MHalwith Hal representing a halogen such as Cl, with M representing a cationic counterion, such as an alkali metal Na+ or K+, or an alkaline-earth metal, preferably an alkali metal, such as Na, Cell representing a polysaccharide radical, such as cellulose, R representing a linear or branched alkyl group comprising from 1 to 10 carbon atoms, preferably from 2 to 3 carbon atoms, such as methyl or ethyl, and MHal the salt generated, such as sodium chloride.

[0067] Advantageously, the compound(s) E are chosen from ethylcellulose, propylcellulose and mixtures thereof, preferably ethylcellulose.The ethylcellulose polymers used in a cosmetic composition according to the invention are preferentially polymers with a degree of substitution with ethoxy groups ranging from 2.5 to 2.6 per anhydroglucose unit, in other words comprising a content of ethoxy groups ranging from 44% to 50%.The average molar mass of the ethylcellulose is preferably chosen such that the viscosity of a 5% by weight solution in a mixture of 80 / 20 (toluene / ethanol) at 25°C ranges from 4 to 300 mPa.s, preferably from 5 to 200 mPa.s, for example from 5 to 150 mPa.s. (standard ASTM D 914).The ethylcellulose used in the composition according to the invention is more particularly in pulverulent form.It is, for example, sold under the Ethocel Standard® trade names by Dow Chemicals, with in particular Ethocel Standard 7 FP Premium® and Ethocel Standard 100 FP Premium®. Other commercially available products, such as those sold by Ashland, Inc. under the names Aqualon Ethylcellulose® type-K, type-N and type-T, preferably type-N, such as N7, N100, are particularly suitable for performing the invention.According to another particular embodiment, the polysaccharide ether(s) are chosen from alkyl guars, i.e. guar gums modified by substitution of hydroxyl hydrogen with a linear or branched alkyl group comprising from 1 to 20 carbon atoms, in particular from 2 to 10 carbon atoms, preferably from 2 to 3 carbon atoms such as 2 carbon atoms. Advantageously, the alkylpolysaccharide is ethyl guar. Ethyl guar is known in particular under the INCI name: C1-5 Alkyl Galactomannan, such as the commercial products ASI D-5783 Modified Polysaccharide Ethyl Guar® and N Hance AG 200 sold by Ashland, and the commercial product Lanco-GEL CP 5® sold by Langer.According to another particular embodiment, the polysaccharide ether(s) are chosen from alkylpullulans, for instance myristoyl pullulan, such as the commercial product Myristoyl Pullulan® sold by Katakura Chikkarin.Norbornene polymers grafted with organosiloxane groupsAmong norbornene polymers grafted with organosiloxane groups, mention may be made of norbonene resins modified with a linear, branched or monocyclic organosiloxane as described in patent JP4475413B2.They correspond to the formula below:[Corrected under Rule 26, 16.10.2024]wherein R1to R16, which may be identical or different, represent a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, a halogen atom, a hydroxyl group, a carboxyl group, an acyloxy group having 1 to 10 carbon atoms, an organooxycarbonyl group having 2 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, a cyanotic group, an amide group, an imide group ora group (SiR19)3wherein R19is a hydrogen atom, a monovalent hydrocarbon group having 1 to 10 carbon atoms, an organooxy group having 1 to 10 carbon atoms, an amide group, an imide group ora group O(SiR202O)pSiR203wherein R20is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and p is an integer from 0 to 20; it being possible for the acid anhydride groups to be identical to or different from one another, and two of the groups R1to R16may form an acid anhydride group;R17is a hydrogen atom or a monovalent hydrocarbon group having from 1 to 10 carbon atoms;R18is a single bond;X is the formula: -(SiR212O)qSiR213-Si(OSiR223)rR203-rwherein R20is a substituted or unsubstituted monovalent hydrocarbon group having from 1 to 10 carbons, and R21are substituted or unsubstituted monovalent hydrocarbon groups having from 1 to 20 carbons, which may be identical to or different from one another, and R22is R21or a group (OSiR212)SR21wherein s is an integer from 0 to 20,q is an integer from 1 to 100,r is 2 or 3, and t is an integer from 0 to 10,m is 0, 1 or 2,n is an integer from 10 to 1 000 000.Among these polymers, mention may be made in particular of that having the INCI name: Norbornene / Tris(Trimethylsiloxy) Silylnorbornene in the solid state, such as that in trade product NBN-30-ID® sold by Shin Etsu.Manufacturing processAnother subject of the invention relates to a process for producing a solid composition as defined above, consisting in milling said film-forming polymer, in the solid state, with at least part of the pulverulent phase, in particular the particulate dyestuffs present in the composition.Another subject of the invention also relates to a solid composition in the form of a loose or compact powder that can be obtained by said preparation process.The pulverulent phase, the film-forming polymer and the optional additional ingredients are mixed dry, in proportions in accordance with the invention, then part or all of the pulverulent phase and the film-forming polymer are subjected to a dry milling step. Among the various dry milling processes, use may be made of powder mill-micronizers operating by friction or collision or a combination thereof, making it possible to obtain very fine milling grades (D50 < 10 µm), such as an air (or inert gas) jet mill, a pin mill or a knife mill.The term "mill-micronizer" according to the invention means a mill making it possible to refine particles to sizes of the order of a few microns, or even of the order of one micron, or even smaller. As commercial references for dry mills, mention may be made in particular of the Chrispro jet mill® air jet mill manufactured by Micro-45 Macinazione S.A. (Italy), the Hosokawa® pin mill supplied by Alpine A. G. (Germany), and the knife mill of the IKA® type M20 brand, sold by IKA Werke GmbH & Co. KG (Germany).In particular, it is possible to use air jet, pin or knife mills, more preferentially a pin mill or a knife mill will be used, preferably a pin mill.According to a particular embodiment of the invention, the solid composition in powder form which can be obtained according to this process has a particle size profile with a D50 ranging from 1 to 15 µm, and preferably from 1 to 10 µm.The particle size analysis of the solid composition in powder form is generally carried out by simple dispersion of said particles in a liquid dispersant and is measured at 25°C, for example with a laser particle size analyzer, according to the recommendations of the supplier.AdjuvantsThe composition may comprise other ingredients (adjuvants) usually used in cosmetics, such as preserving agents, cosmetic active agents, moisturizers, UV-screening agents, fragrances and preserving agents.Needless to say, a person skilled in the art will take care to select the optional adjuvant(s) added to the composition according to the invention such that the advantageous properties intrinsically associated with the composition in accordance with the invention are not, or are not substantially, adversely affected by the envisaged addition.Cosmetic applicationsThe composition of the invention in compact powder form may be a skincare product.The composition of the invention in compact powder form may be a makeup product for the skin, notably for the face, such as a foundation, for the cheeks, such as a face powder, or for the eyelids, such as an eyeshadow.According to a particular embodiment, the composition of the invention can be used as a second layer (top coat) applied to a first layer (base coat) formed by a first care composition comprising at least one oily phase in order to reinforce the composition of the invention, in particular more resistant to sebum.Another subject of the invention relates to a process for coating keratin materials, more particularly for caring for and / or making up keratin materials, such as the skin, characterized in that it comprisesa) applying to the keratin materials a first layer with a care composition (A) (base coat) comprising, in particular in a physiologically acceptable medium, at least one oily phase; andb) applying, on the first layer formed by said composition (A), a second layer with a composition (B) (top coat) constituted of a composition as defined above.The term “oily phase” refers to a phase which is liquid at ambient temperature (25°C) and at atmospheric pressure, comprising oils, waxes or pasty substances and also optionally all the organic solvents and ingredients that are soluble or miscible in said phase.The volatile oil(s) may be chosen from mineral oils, oils of plant origin, synthetic oils, in particular chosen from hydrocarbon and / or silicone oils, and mixtures thereof. They may be volatile or nonvolatile.The term “nonvolatile oil” refers to an oil that remains on the skin or the keratin fiber at ambient temperature and atmospheric pressure for at least several hours, and that notably has a vapor pressure of less than 2.66 Pa, preferably less than 0.13 Pa. By way of example, the vapor pressure may be measured via the static method or via the effusion method by isothermal thermogravimetry, depending on the vapor pressure (OECD standard 104).Another subject of the invention relates to a kit for coating keratin materials such as the skin, in particular a kit for caring for and / or making up the materials, comprising at least two compartments, namelya) a first compartment comprising a composition (A) as defined above; andb) a second compartment comprising a composition (B) as defined aboveSetAccording to another aspect, the invention also relates to a cosmetic set comprising:i) a container delimiting one or more compartment(s), said container being closed by a closing element; andii) a makeup and / or care composition in accordance with the invention placed inside said compartment(s).The container may be, for example, in the form of a jar or a casing.The closing element may be in the form of a lid or a tear-off cover. In particular, this closing element may comprise a lid mounted so as to be able to move by translation or by pivoting relative to the container housing said makeup and / or care composition(s).It is understood that, in the context of the present invention, the weight percentages given for a compound or a family of compounds are always expressed as weight relative to the total weight of the composition.Throughout the patent application, the term "comprises a" should be understood as meaning "comprising at least one", unless otherwise specified.It is understood that the examples which follow are present by way of illustration and that they do not in any way limit the scope of the protection conferred by the present patent application.ExamplesThe following compositions were prepared according to the following procedures.IngredientsExample of compositionaccording to the invention (1)Comparative exampleoutside the invention (2)Comparative exampleoutside the invention (3)PigmentsTitanium dioxide (68.5%)Yellow iron oxide (25%)Red iron oxide (5%)Black iron oxide (1.5%)qs 100qs 100qs 100TrimethylsiloxysilicateResin3020-Isododecane20-Protocol for preparing the example of composition according to the invention (1):The trimethylsiloxysilicate resin and the pigments were premixed with a spatula, then 50 grams of the mixture were milled for 15 seconds using an IKA type M20® knife mill sold by IKA Werke GmbH & Co. KG (Germany). The lid was then opened, the edges and the lid and also the milling chamber were scraped with the brush to check that there was no agglomeration (powder stuck to the walls). Then another 15 seconds of milling were performed.Protocol for preparing the comparative example outside the invention (2):The trimethylsiloxysilicate resin and the isododecane were mixed with stirring in a Moritz stirrer or with vigorous Rayneri stirring, until the resin was completely solubilized. The pigments were then added and the mixture was placed in an extruder. Any equipment or equipment combination for controlling a mechanical action that will blend the product gradually as it is prepared, such as processes functioning continuously of scraped-surface exchanger type, or preferably of blender / twin-screw extruder type (referred to for simplicity as “extruder” in the rest of the present document) is suitable for use. Mention may be made, in particular, of the BC-21® and BC-45® models from Clextral, or the Prism Eurolab® model from ThermoRhéo.Protocol for preparing the comparative example outside the invention (3)The comparative example outside the invention (3) is obtained by simple mixing of the ingredients with a marysette spatula.Transfer resistance testsThe compositions of examples (1), (2) and (3) were each applied by spreading with a finger to synthetic skin of the "Bioskin Plate®" type sold by Maprecos. The amount deposited is 10 mg on a surface area equivalent to a disk 5 cm in diameter. When the composition contains a volatile solvent (in the case of the comparative example outside the invention 2), the deposit was left to dry until the volatile solvent had completely evaporated. The surface was then rubbed with a paper tissue to remove the excess. A drop of water was then deposited on the surface for 1 minute. Then a cotton pad of the brand DemakUp® was applied to the surface in order to absorb the drop of water. The color of the product transferred onto the cotton pad was then evaluated visually.Test for stability over time in a permeable containerThe compositions of examples (1), (2) and (3) were each introduced into a metal cup with dimensions 59 mm×43 mm×5 mm, then placed in the casing of the product Vichy Dermablend Fond De Teint Compact Crème Correcteur 12h Teinte15 Opal. This casing has openings underneath and is not impermeable. The casing with the product is then weighed, and the loss of mass is measured over time, ensuring that the openings of the casing are in contact with the ambient air.The results are shown in the following table.PerformanceExample of compositionaccording to the invention (1)Comparative exampleoutside the invention (2)Comparative exampleoutside the invention (3)Transfer ontocotton padNo trace on cotton padNo trace on cotton padColored trace on cotton padStability over time in a permeable containerConsistent performanceDrying over timeConsistent performanceThe composition according to the invention (1) was the only powder to exhibit both good transfer resistance and consistent performance over time.The example of composition according to the invention (1), obtained according to the milling process according to the invention, was then compared with an identical composition obtained by simple mixing of the ingredients with a marysette spatula (4).It was observed that the composition obtained according to the milling process according to the invention (1) exhibited, during application to the skin, a more homogeneous color spread and better constancy of the shade, compared to the composition obtained by simple mixing of the ingredients with a marysette spatula (4).

Claims

A solid composition in the form of a powder, notably for coating keratin materials, more particularly for making up and / or caring for keratin materials, such as the skin, notably comprising a physiologically acceptable medium and containing at least:a) a pulverulent phase, andb) at least one film-forming polymer in the solid state.The composition as claimed in claim 1, which preferably comprises less than 3.0% by weight of water relative to the total weight of the composition, preferably less than 2.0% by weight of water, or even is free of water.[Corrected under Rule 26, 16.10.2024]The composition as claimed in claim 1 or 2, comprising a solids content of greater than or equal to 85%, better still greater than or equal to 90%, or even greater than or equal to 95%.[Corrected under Rule 26, 16.10.2024]The composition as claimed in any one of the preceding claims, comprising a proportion of volatile oil of less than 15% by weight, preferably less than 10% by weight, preferably less than 5% by weight relative to the total weight of the composition, the composition preferably being free of volatile oil.The composition as claimed in any one of the preceding claims, which is in the form of a loose powder or a compact powder.The composition as claimed in any one of the preceding claims, having a pulverulent phase content greater than or equal to 50.0% by weight, in particular greater than or equal to 60.0% by weight, and more particularly ranging from 60% to 80% by weight, relative to the total weight of the composition.The composition as claimed in any one of the preceding claims, wherein the pulverulent phase comprises at least one filler and / or at least one particulate dyestuff.The composition as claimed in claim 7, wherein the filler(s) is (are) present in a content ranging from 0% to 90% by weight, more preferentially from 50% to 80% by weight, relative to the total weight of the composition.The composition as claimed in claim 7 or 8, wherein the filler(s) is (are) present in a content ranging from 0% to 95% by weight, more preferentially from 25% to 90% by weight, relative to the total weight of the pulverulent phase.The composition as claimed in claim 7, wherein the content of particulate dyestuffs(s) ranges from 5% to 90% by weight, and preferentially ranges from 10% to 70% by weight relative to the total weight of the composition.The composition as claimed in claim 7, wherein the pulverulent phase comprises a content of particulate dyestuffs(s) preferably ranging from 5% to 100% by weight, and preferentially ranging from 10% to 75% by weight relative to the total weight of the pulverulent phase.The composition as claimed in any one of claims 7, 10 and 11, wherein the particulate dyestuffs(s) is (are) chosen from pigments, nacres, reflective particles and mixtures thereof, and more particularly chosen from titanium dioxides, iron oxides and mixtures thereof; said pigments optionally comprising at least one lipophilic or hydrophobic coating.The composition as claimed in any one of the preceding claims, comprising from 0.5% to 50% by weight, more preferentially from 1% to 30% by weight, more particularly from 5% to 15% by weight, as active material, of hydrophobic film-forming polymer(s), relative to the total weight of the composition.The composition as claimed in any one of the preceding claims, wherein the film-forming polymer(s) is (are) hydrophobic, in particular liposoluble.The composition as claimed in any one of the preceding claims, wherein the hydrophobic film-forming polymer(s) in the solid state is (are) chosen from- a silicone resin;- a copolymer comprising carboxylate groups and polydimethylsiloxane groups;- a vinyl polymer comprising at least one carbosiloxane dendrimer-based unit;- an ethylene block copolymer;- a polysaccharide grafted with organosiloxane groups;- a polysaccharide ether;- a norbornene polymer grafted with organosiloxane groups;- mixtures thereof.The composition as claimed in claim 15, wherein the silicone resin is trimethylsiloxysilicate.The composition as claimed in claim 15, wherein the copolymer comprising carboxylate groups and polydimethylsiloxane groups is chosen from the products having the INCI name: Acrylates / Ethylhexyl Acrylate / Dimethicone Methacrylate.The composition as claimed in claim 15, wherein the vinyl polymer comprising at least one carbosiloxane dendrimer-based unit is chosen from that having the INCI name Acrylates / Polytrimethylsiloxymethacrylate, in the solid state.The composition as claimed in claim 15, wherein the ethylenic block copolymer is obtained from at least one isobornyl methacrylate monomer, at least one isobornyl acrylate monomer, at least one isobutyl acrylate monomer and at least one acrylic acid monomer, and in particular is chosen from the polymers having the INCI name Acrylic Acid / Isobutyl Acrylate / Isobornyl Acrylate Copolymer.The composition as claimed in claim 15, wherein the polysaccharide grafted with organosiloxane groups is that having the INCI name: Trimethylsiloxysilylcarbamoyl Pullulan, in the solid state.The composition as claimed in claim 15, wherein the polysaccharide ether is chosen from ethylcellulose, ethyl guar and myristoyl pullulan.The composition as claimed in claim 15, wherein the norbornene polymer grafted with organosiloxane groups is that having the INCI name: Norbornene / Tris(Trimethylsiloxy)silylnorbornene, in the solid state.A process for producing a solid composition as defined in any one of the preceding claims, consisting in milling said film-forming polymer, in the solid state, with at least part of the pulverulent phase, in particular the particulate dyestuffs present in the composition.A solid composition in powder form, which can be obtained by means of the process as claimed in claim 23.A cosmetic set comprising:i) a container delimiting one or more compartment(s), said container being closed by a closing element; andii) a solid composition in powder form as defined in any one of claims 1 to 22 and 24, placed inside said compartment(s).A process for coating keratin materials, more particularly for making up and / or caring for keratin materials, such as the skin, which comprises applying to the keratin materials a composition in powder form as claimed in any one of claims 1 to 22 and 24.A process for coating keratin materials, more particularly caring for and / or making up keratin materials, such as the skin, which comprisesa) applying to the keratin materials a first layer with a care composition (A) (base coat) comprising, in particular in a physiologically acceptable medium, at least one oily phase; andb) applying, on the first layer formed by said composition (A), a second layer with a composition (B) (top coat) constituted of a composition as defined in any one of claims 1 to 22 and 24.A kit for coating keratin materials such as the skin, in particular a kit for caring for and / or making up the materials, comprising at least two compartments, namelya) a first compartment comprising a composition (A) as claimed in claim 27; andb) a second compartment comprising a composition (B) constituted of a composition as defined in any one of claims 1 to 22 and 24.

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