ES2357572T3 - COMPOSITION INTENDED TO BE APPLIED ON SKIN AND TEGUMENTS. - Google Patents

Abstract

Composition for application to the skin, lips and/or integuments comprises a composite pigment comprising a mineral core coated with an organic pigment via a binder. An Independent claim is also included for lipstick, foundation, nail varnish, mascara and hair dye products comprising the composition.

Description

The present invention relates to compositions intended to be applied to the skin, including mucous membranes, particularly lips, and teguments, particularly nails, eyelashes, eyebrows and hair.

It is a known practice to incorporate organic pigments into cosmetic compositions, said pigments being able to obtain colors with a high saturation. However, its coating capacity is poor, with the addition of mineral pigments to the composition.

EP 1 184 426 (Toda Kogyo Corporation) describes the use of a paint / ink composition comprising composite particles with an average particle size of 0.001-10.0 microns, comprising a white TiO2 mineral core coated with a Blue organic pigment (that is, Cl 74160 = phthalocyanine blue) in an amount between 1 and 500% by weight of said white core particles, and a binder selected from among organosilicon compounds, in the form of liquid or solid compositions. The use of the same binder confers adhesion to the surface without the presence of covalent bonds. Compositions based on oil, solvent or water and additives make said compositions suitable for cosmetic applications, but no additives are mentioned for preparing lipstick compositions.

In addition, JP-11012493 (Kose Corp) uses a composite cosmetic powder comprising a colored mineral core (MgO, silicates) coated with an organic dye and calcium chloride or aluminum chloride as a binder.

The presence in the composition of a mixture of pigments of different nature implies a risk of variability of the properties, particularly when different shades are obtained by modifying the proportions of the organic and mineral pigments. This is because the behavior of organic and mineral pigments against the other components of the composition is not the same, which results in formulation difficulties. Therefore, the bars of a range of lipstick shades will have a variable hardness.

In addition, the behavior of organic and mineral pigments against the other components of the composition is likely not to be the same, which translates into formulation difficulties and the risk that makeup will change over time, for example, when a volatile compound is evaporated. Thus, for example, some lipsticks comprise mineral pigments, such as TiO2, and an oil phase; TiO2 particles may turn white when they are no longer coated with said oil phase, which modifies the color of the applied composition and poses a problem of color stability over time.

Finally, when lacquers are used, it is possible for the organic dye used in them to be transferred to the support and stain it. Pigments conventionally used in cosmetic formulations have a size of approximately one micrometer or greater. This larger size, combined with a high density, causes problems of sedimentation and stability in liquid formulations. In addition, it prevents obtaining transparency effects associated with high color saturation.

It is necessary to obtain a composition, particularly a cosmetic composition, that solves all or some of the above-mentioned drawbacks.

Thus, an object of the present invention, among others, is the use of a composition comprising, in a physiologically acceptable medium, at least one compound pigment comprising:

-a titanium oxide mineral core,

-

 at least one organic pigment that covers at least partially, said mineral core, and

-

 at least one binder selected from the group consisting of silicone compounds, polymeric and oligomeric compounds or the like, and in particular between organosilanes, fluoroalkyl organosilanes and polysiloxanes, and couplers based on silanes, titanates, aluminates or zirconates, and mixtures thereof. themselves, to fix the organic pigment on the mineral core

for the makeup of the skin, lips or teguments.

The invention makes it possible to obtain cosmetic compositions comprising at least one compound pigment having a relatively strong coating power and the advantages of an organic pigment, particularly a relatively high color saturation. The binder can allow the organic pigment to be fixed on the mineral core without any covalent bond between them.

The composite pigment can have a density greater than that of the organic pigment alone, due to the presence of the mineral core, the density of said core being higher than that of the organic pigment.

A suitable shade can be obtained by mixing compound pigments according to the invention, either by mixing organic pigments in the composite pigment, or with successive layers of organic binders and pigments in the composite pigment.

The present invention can thus allow the preparation of compositions without mixing organic and mineral pigments and / or without comprising any pigment that presents the sensitivity of the lacquers, being able to facilitate the formulation and avoid the inconveniences associated with the use thereof.

In addition, with an appropriate selection of the organic pigment, and especially its color, it is possible, where appropriate, to reinforce the coloration of the mineral core. For example, it is possible to obtain an intense black, for example, by combining a black iron oxide and an organic pigment. The size of the mineral core can be easily varied in order to modify the size of the final composite pigment. For example, color pigments of nanometric size can be obtained. These correctly dispersed nanometric size pigments make it possible in particular to avoid the sedimentation problems observed in the larger pigments. The refractive index of the composite pigment can also be easily modified by varying the mineral core index. The presence of the binder allows both to fix the organic pigment on the surface during the preparation of the pigment and reduce any transfer of the pigment on the support.

The term "physiologically acceptable medium" refers to a non-toxic medium that can be applied to human skin, lips or teguments. The physiologically acceptable medium will adapt to the nature of the support on which the composition should be applied, and also to the way in which said composition is intended to be packaged, particularly in solid, semi-solid or liquid form at room temperature and atmospheric pressure.

The term "cosmetic composition" refers to a composition as defined in Council Directive 93/35 / EEC of June 14, 1993.

The organic pigment can be selected from among insoluble particulate compounds in the physiologically acceptable medium of the composition.

In particular, the organic pigment can be selected from the families of nitrous compounds, nitro, azo, xanthene, quinoline, anthraquinone, phthalocyanine and carmine, and carbon black.

The pigment can be selected from the following non-limiting list, which refers to the color index, as is Directive 93/35 / EEC:

-

 blue pigment: CI 42090, 69800, 69825, 73000, 74100, 74160;

-

 Yellow pigment: CI 11680, 11710, 15985, 19140, 20040, 21100, 21108, 47000, 47005;

-

 green pigment: CI 61565, 61570, 74260;

-

 Orange pigment: CI 11725, 15510, 45370, 71105;

-

 red pigment: CI 12085, 12120, 12370, 12420, 12490, 14700, 15525, 15580, 15620, 15630, 15800, 15850, 15865, 15880, 17200, 26100, 45380, 45410, 58000, 73360, 73915, 75470;

- Black pigment: CI 77266.

The binder can be of any type, provided that it allows the organic pigment to adhere to the surface of the mineral core.

The binder is selected in particular from the list comprising silicone compounds, polymeric or oligomeric compounds or the like, and in particular among alkoxysilanes, fluoroalkyl silanes and polysiloxanes, and couplers based on silanes, titanates, aluminates or zirconates, and mixtures thereof .

As mentioned above, the mineral core can be colored, that is, for example, not transparent, being the same eventually, for example, white or black.

The mass ratio of the organic pigment may be between 1 and 500 parts by weight per 100 parts by weight of the core, for example.

The size of the composite pigment particles may be between 0.001 and 150 µm, particularly between 0.01 and 50 µm, for example between 0.01 and 25 µm, or between about 0.05 µm and about 10 µm. The size of the pigment particles may be particularly less than 2 µm, or even less than or equal to 1 µm. The term "size" refers to the dimension assigned by the statistical distribution of particle size to half of the population, known as D50.

Due to aesthetic reasons, it is generally preferred that the composite pigment particles are not perceptible, or not readily detectable, to the naked eye, on the surface of the composition applied to their support. It is also desirable that the composite pigment particles do not have sizes that cause a feeling of discomfort in the support. Thus, it is preferred to use particles smaller than or equal to 250 µm, and better still less than or equal to 150 µm, for example, less than 15 µm. The particle size may also depend on the nature of the support on which the composition is intended to be applied; For example, certain parts of the body or face can tolerate larger sizes more easily than others without experiencing discomfort.

Composite pigment particles can have various shapes. In particular, said particles may have a platelet or globule shape, in particular a spherical shape, and may be hollow or solid. The expression "in the form of platelets" refers to particles in which the ratio between the greatest dimension and the thickness is greater than or equal to 5.

The composition may comprise only compound pigments, as defined above, or, as a variant, may comprise compound pigments, as well as pigments with another structure, particularly mineral pigments, interference pigments, lacquers or organic pigments. Particularly, the composition may not comprise uncoated TiO2 particles.

The composition may comprise one or more compound pigments in a mass proportion that may be comprised between 0.1% and 20%, particularly between 0.1% and 15%, and even more particularly between 0.5% and 10%. %, particularly by weight with respect to the total weight of the composition.

The composition may comprise at least one aqueous or organic solvent.

When the composition comprises one or more organic solvents, said solvents may be present in an amount between 0 and 99% with respect to the total weight of the composition.

In general, the amount of solvent or solvents, particularly organic solvent or solvents, depends on the nature of the support on which the composition is intended to be applied.

In the case of a nail polish, for example, the organic solvent may be present in the composition in a content comprised, for example, between 30% and 99% by weight, and preferably between 60% and 90% by weight with respect to to the total weight of the composition.

The composition may comprise at least one organic solvent selected from the following list:

- liquid ketones at room temperature, such as methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, isophorone, cyclohexanone or acetone;

- liquid alcohols at room temperature, such as ethanol, isopropanol, diacetone alcohol, 2-butoxyethanol or cyclohexanol;

-

 liquid glycols at room temperature, such as ethylene glycol, propylene glycol, pentylene glycol or glycerol;

-

 liquid propylene glycol ethers at room temperature, such as propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate or dipropylene glycol mono-n-butyl ether;

-

 short chain esters (containing 3 to 8 carbon atoms in total), such as ethyl acetate, methyl acetate, propyl acetate, n-butyl acetate or isopentyl acetate;

-

 liquid alkanes at room temperature, such as decane, heptane, dodecane or cyclohexane.

The composition may also comprise water or a mixture of water and hydrophilic organic solvents commonly used in cosmetics, for example, alcohols and, in particular, linear or branched lower monoalcohols containing 2 to 5 carbon atoms, for example, ethanol, isopropanol or n-propanol, polyols, for example glycerol, diglycerol, propylene glycol, sorbitol, pentylene glycol or polyethylene glycols. The composition may also contain C2 ethers and hydrophilic C2-C4 aldehydes. Water or a mixture of water and hydrophilic organic solvents may be present in the composition in a content comprised, for example, between 0% and 90% by weight, particularly between 0.1% and 90% by weight, preferably between 0% and 60% by weight, and particularly between 0.1% and 60% by weight, with respect to the total weight of the composition.

The composition, particularly when it is intended to be applied to the lips, may comprise a fatty phase and, particularly at least one liquid fatty substance at room temperature (25 ° C) and / or a solid fatty substance at room temperature, such as waxes, pasty fatty substances, gums and mixtures thereof. The fatty phase may also contain lipophilic organic solvents.

The composition may, for example, have a continuous fatty phase, which may contain less than 5% water and particularly less than 1% water, with respect to its total weight, and, in particular, may be presented in an anhydrous form.

As liquid fatty substances at room temperature, often referred to as "oils", there may be mentioned: vegetable oils based on hydrocarbons, such as liquid triglycerides of fatty acids containing from 4 to 10 carbon atoms, for example heptanoic acid triglycerides or octanoic, or sunflower oil, corn oil, soybean oil, grapeseed oil, sesame seed oil, apricot oil, macadamia oil, castor oil, avocado oil, caprylic / capric acid triglycerides, jojoba oil or shea butter; linear or branched hydrocarbons of mineral or synthetic origin, such as liquid paraffins and their derivatives, petrolatum, polydecenes and hydrogenated polyisobutene, such as Parleam; synthetic esters and ethers, particularly fatty acids, for example, PurCellin oil, isopropyl myristate, 2-ethylhexyl palmitate, 2-octyldodecyl stearate, 2octyldodecyl erucate or isostearyl isostearate; isononyl isonanoate; hydroxylated esters, for example, isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisoestearyl malate, triisocetyl citrate, or fatty alkyl heptanoates, octanoates and decanoates; polyol esters, for example, propylene glycol dioctanoate, neopentyl glycol diheptanoate or diethylene glycol diisononanoate; and pentaerythritol esters; fatty alcohols containing from 12 to 26 carbon atoms, for example, octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2undecylpentadecanol or oleyl alcohol; fluoride oils partially hydrocarbon based and / or silicone based; silicone oils, for example, volatile or non-volatile polydimethylsiloxanes (PDMS), linear or cyclic, liquid or pasty at room temperature, for example, cyclomethicones, dimethicones, optionally comprising a phenyl group, for example phenyl trimethicones, phenyltrimethylsiloxydiphenylsiloxanes, diphenylmethyldimethyltrisiloxanes, diphenyl dimethicones, phenyl dimethicones and polymethylphenylsiloxanes; and mixtures thereof. The oils may be present with a content between 0.01% and 90%, and more preferably between 0.1% and 85% by weight, with respect to the total weight of the composition.

The pasty fatty substances are generally hydrocarbon-based compounds with a melting point between 25 and 60 ° C, and preferably between 30 and 45 ° C, and / or with a hardness between 0.001 and 0.5 MPa, preferably between 0.005 and 0.4 MPa, for example lanolines and derivatives thereof.

The waxes can be solid at room temperature (25 ° C), with a reversible solid / liquid state change, with a melting point greater than 30 ° C, which can be up to 200 ° C, with a hardness greater than 0 , 5 MPa, and can present, in solid form, an anisotropic crystalline organization. In particular, the waxes may have a melting point greater than 25 ° C, and preferably greater than 45 ° C. They can be hydrocarbon based waxes, fluorine waxes and / or silicone waxes, and they can be of vegetable, mineral, animal and / or synthetic origin. As waxes that can be used, there may be mentioned beeswax, carnauba wax or candelilla wax, paraffins, microcrystalline waxes, ceresin or ozoquerite; synthetic waxes, such as polyethylene wax or Fischer-Tropsch wax, and silicone waxes, for example, alkyl or alkoxy dimethicones containing 16 to 45 carbon atoms. The composition may contain between 0 and 50% by weight of waxes, or even between 1% and 30% by weight of waxes, with respect to the total weight of the composition.

The gums that can be used in general are high molecular weight polydimethylsiloxanes (PDMS) or cellulose gums or polysaccharides.

The composition may also comprise, for example, a film-forming polymer, particularly in the case of a mascara or a nail polish. The term "film-forming polymer" refers to a polymer capable, by itself.

or in the presence of an auxiliary film forming agent, of forming a continuous film that adheres to a support, and particularly to keratin materials.

Among the film-forming polymers that can be used in a composition according to the invention, there may be mentioned, among others, synthetic polymers of the free radical type or polycondensate type, naturally occurring polymers, such as nitrocellulose or cellulose esters, and mixtures thereof.

Film-forming polymers of the free radical type may be particularly vinyl polymers or copolymers, particularly acrylic polymers.

Vinyl film-forming polymers can be obtained from the polymerization of ethylenically unsaturated monomers containing at least one acidic group and / or esters of these acidic monomers, and / or amides of these acidic monomers, for example α-carboxylic acids, unsaturated β-ethylenic, such as acrylic acid, methacrylic acid, crotonic acid, maleic acid or itaconic acid.

Vinyl film-forming polymers can also be obtained from the homopolymerization or copolymerization of monomers selected from vinyl esters, for example vinyl acetate, vinyl neodecanoate, vinyl pivalate, vinyl benzoate and vinyl t-butylbenzoate, and styrene monomers, for example styrene and α-methylstyrene.

Among the film-forming polycondensates that may be mentioned, polyurethanes, polyesters, polyesteramides, polyamides and polyureas are included in a non-limiting manner, without this list being limiting.

Optionally modified polymers of natural origin can be selected from shellac resin, sandrach gum, damar resins, elemum gums, copal resins, cellulose-based polymers, such as nitrocellulose, ethyl cellulose or nitrocellulose esters selected, for example, from between cellulose acetate, cellulose acetobutyrate and cellulose acetopropionate, and mixtures thereof.

The film-forming polymer may be present in the form of particles in aqueous or oily dispersion, generally known as latex or pseudo-latex. The film-forming polymer may comprise one or more stable dispersions of generally spherical polymer particles of one or more polymers, in a physiologically acceptable liquid fatty phase. Such dispersions are generally known as polymeric NADs (non-aqueous dispersions), as opposed to latexes, which are aqueous polymeric dispersions. These dispersions can be presented particularly in the form of polymer nanoparticles in a stable dispersion in said fatty phase. Said nanoparticles have a size preferably between 5 and 600 nm. The techniques for preparing these dispersions are well known to those skilled in the art.

Aqueous dispersions of film-forming polymers that can be used comprise the acrylic dispersions marketed under the names Neocryl XK-90®, Neocryl A-1070®, Neocryl A-1090®, Neocryl BT-62®, Neocryl A-1079® and Neocryl A-523® by Avecia-Neoresins, Dow Latex 432®, by Dow Chemical, Daitosol 5000 AD®, by Daito Kasei Kogyo; or aqueous polyurethane dispersions marketed under the names Neorez R-981® and Neorez-R-974®, by Avecia-NeoResins, Avalure UR-405®, Avalure UR-410®, Avalure UR-425®, Avalure UR -450®, Sancure 875®, Sancure 861®, Sancure 878® and Sancure 2060®, by Goodrich, Impranil 85®, by Bayer, and Aquamere H-1511®, by Hydromer; or sulphopolopolyesters sold under the trade name AQ Eastman by the company Eastman Chemical Products.

The composition according to the invention may also comprise an auxiliary film-forming agent that facilitates the formation of a film with the film-forming polymer.

The composition may also comprise fillers. The term "fillers" refers to particles of any form that are insoluble in the medium of the composition, regardless of the temperature at which it is prepared. These fillers may particularly serve to modify the rheology or texture of the composition. The nature and quantity of solid substances depends on the desired mechanical properties and textures.

Examples of fillers that may be mentioned, among others, include talc, mica, silica, kaolin, sericite, polyamide powder, polyethylene powder, polytetrafluoroethylene powder, polymethyl methacrylate powder, polyurethane powder, starch powders and silicone resin beads.

The composition may comprise at least one cosmetic or dermatological active agent. As cosmetic, dermatological, hygienic or pharmaceutical active agents that can be used in the compositions according to the invention, there may be mentioned moisturizing products (polyols, for example glycerol), vitamins (C, A, E, F, B or PP), Essential fatty acids, essential oils, ceramides, sphingolipids, fat-soluble sunscreens or sunscreens in the form of nanoparticles, and specific active agents for skin treatment (protective agents, antibacterial agents, wrinkle agents, etc.). Said active agents can be used, for example, in concentrations between 0 and 20% and, in particular, between 0.001 and 15% with respect to the total weight of the composition.

The cosmetic composition may also contain ingredients commonly used in cosmetics, for example thickeners, surfactants, trace elements, moisturizers, softeners, sequestering agents, fragrances, acidifying or alkalinizing agents, preservatives, antioxidants, UV protective agents, or mixtures thereof.

The cosmetic composition may also comprise, depending on the type of application provided, the components conventionally used in the areas considered, which are present in an amount suitable for the desired form of presentation.

The composition can be presented in various forms, depending on its intended use. Thus, the cosmetic composition can adopt any form of presentation normally used for topical application and particularly in anhydrous form, in the form of an oily or aqueous solution, an oily or aqueous gel, an oil-in-water emulsion, water-in-oil , of wax in water or of water in wax, a multiple emulsion, or a dispersion of oil in water by means of vesicles placed in the oil / water interface.

The composition may be presented in the form of a molded product, particularly in the form of a bar, in the case of a lipstick or a lip care product.

The composition can also be presented in various other forms, for example, in the form of a more or less viscous liquid, gel or paste.

The composition can also be presented in the form of semi-solid or solid, for example a cookie that is moistened at the time of use, in order to allow its disintegration.

The cosmetic composition may constitute, among others, a lipstick, a liquid lip gloss, a lipstick, a makeup blush, a lipstick, a solid or liquid base, a corrective product or eye contour product, an eyeliner, a mascara, a nail polish, an eye shadow, a body or hair makeup product, or a sunscreen product or skin coloring product.

Thus, an object of the invention is also a lipstick comprising a composition according to the previous definition.

COMPOSITE PIGMENT

The compound pigment according to the invention can be prepared, for example, by one of the processes described in European patent applications EP 1 184 426 and EP 1 217 046.

A compound pigment according to the invention is particularly composed of particles comprising:

-a titanium oxide mineral core,

-

 at least one binder selected from the group consisting of silicone compounds, polymeric and oligomeric compounds or the like, and in particular between organosilanes, fluoroalkyl organosilanes and polysiloxanes, and couplers based on silanes, titanates, aluminates or zirconates, and mixtures thereof , to fix the organic pigment on the core, and

-

 at least one organic pigment that at least partially covers the core.

Composite pigments may, for example, have a specific BET surface area between 0.5 and 500 m2 / g, particularly between 1.5 and 400 m2 / g, and particularly between 2 and 300 m2 / g. The "BET specific surface" is the value measured by the BET procedure.

Use of a composition comprising, in a physiologically acceptable medium, at least one compound pigment comprising:

a titanium oxide mineral core,

at least one organic pigment that covers at least partially the mineral core, and

at least one binder selected from the group consisting of silicone compounds, polymeric and oligomeric compounds or the like, and in particular from organosilanes, fluoroalkyl organosilanes and polysiloxanes, and couplers based on silanes, titanates, aluminates or zirconates, and mixtures of the same, to fix the organic pigment on the mineral core, to make up the skin, lips or teguments.

More specifically, as a lipstick comprising said compound pigments.

MINERAL CORE

It can be presented in any form suitable for fixing organic pigment particles, for example spherical, granular, polyhedral, acicular, fusiform, in the form of flakes, rice grains or scales, as well as a combination of these forms. .

Preferably, the relationship between the major dimension and the minor dimension is between 1 and 50.

The average size may be, for example, between 0.0009 µm and 9.95 µm, particularly between 0.002 µm and 9.45 µm, or even between 0.009 µm and 8.95 µm. These size values are more particularly suitable when the composite pigment particles are prepared in accordance with the processes described in the aforementioned patents EP 1 184 426 and EP 1 217 046. The term "average size" refers to the average value obtained by the measurement of 350 mineral cores per micrograph.

Composite pigments may have a specific BET surface area between 0.5 and 500 m2 / g, particularly between 1 and 400 m2 / g, and particularly between 1.5 and 300 m2 / g.

When the mineral cores are white, their coating power may be greater than 600 cm2 / g. When said mineral cores are not white, that is, when they are colored, transparent or black, their coating power may be less than 600 cm2 / g.

BINDER

The binder can be of any type, provided that it allows the organic pigment to adhere to the surface of the mineral core.

The binder is selected from a list comprising silicone compounds, polymeric and oligomeric compounds or the like, and in particular is selected from organosilanes, fluoroalkyl organosilanes and polysiloxanes, and couplers based on silanes, titanates, aluminates or zirconates, and mixtures of the same.

The silicone compound may be selected from a non-limiting list that particularly comprises:

-organosilanes (1) obtained from alkoxysilanes,

- modified or unmodified polysiloxanes (2), selected from a non-limiting list comprising:

-

 modified polysiloxanes (2A) comprising at least one radical selected particularly from polyethers, polyesters and epoxy compounds (referred to hereinafter as "modified polysiloxanes"),

-

 the polysiloxanes (2B) having, at least one silicon atom disposed at the end of the polymer

5 a group selected from a non-limiting list comprising carboxylic acids, alcohols and hydroxyl groups, and

- the fluoroalkyl organosilanes compounds (3) obtained from fluoroalkylsilanes.

The organosilane compounds (1) can be obtained from alkoxysilane compounds represented by the formula (I):

10 R1aSi X4-a (I)

in which:

-R1 represents C6H5-, (CH3) 2 CH CH2- or n-Cb H2b + 1- (b being between 1 and 18),

-X represents CH3O- or C2H5O-, and

- a is between 0 and 3.

15 Specific examples of alkoxysilanes compounds may include alkoxysilanes selected from: methyltriethoxysilane, dimethyldiethoxysilane, feniltrietioxisilano, diphenyldiethoxysilane, methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, isobutyltrimethoxysilane, decyltrimethoxysilane and the like, in particular from methyltriethoxysilane, feniltrietioxisilano, methyltrimethoxysilane, dimethyldimethoxysilane and isobutyltrimethoxysilane, and even more particularly methyltriethoxysilane, methyltrimethoxysilane or phenyltriethioxysilane.

The polysiloxanes (2) may correspond in particular to formula (II):

image 1

wherein R2 represents H- or CH3-, and d is between 15 and 450. Among these polysiloxanes, those in which R2 represents H. are preferred. The modified polysiloxanes (2A) may correspond in particular to the following formulas:

modified -polysiloxanes (a1) having polyethers, represented by the formula (III)

image 1

wherein R3 represents - (CH2) h-; R4 represents - (CH2) i-CH3, R5 represents -OH, -COOH, -CH = CH2, -C (CH3) = CH2 or (CH2) j-CH3; R6 represents - (CH2) k-CH3; g and h are independently comprised between 1 and 15; j and k are independently between 0 and 15, and e is between 1 and 50, and f between 1 and 300,

Modified -polysiloxanes (a2) having polyesters, represented by formula (IV):

image 1

wherein R7, R8 and R9 independently represent - (CH2) q-; R10 represents -OH; -COOH, -CH = CH2C (CH3) = CH2 or - (CH2) r-CH3; R11 represents - (CH2) 5-CH3; n and q are independently comprised between 1 and 15, r and s are independently comprised between 0 and 15; e is between 1 and 50, and f is between 1 and 300,

Modified -polysiloxanes (a3) having epoxy radicals, represented by the formula (V):

image 1

wherein R12 represents - (CH2) v-; v is between 1 and 15; t is between 1 and 50, and u is between 1 and 300; or mixtures thereof.

Among modified polysiloxanes (2A), modified polysiloxanes having polyethers of formula (III) are preferred. The modified polysiloxanes at the end (2B) may correspond to the formula (VI):

image 1

wherein R13 and R14 may represent -OH, R16 OH or R17 COOH, independently of each other; R15 represents -CH3 or -C6H5; R16 and R17 represent - (CH2) and-; and is between 1 and 15; w is between 1 15 and 200, and x is between 0 and 100.

Among these polysiloxanes modified at least at one end, those with at least one radical (R16 and / or R17) having a carboxylic acid group in at least one terminal silicon atom are more preferred.

The fluoroalkyl organosilane compounds (3) can be obtained from fluoroalkyl silane compounds represented by the formula (VII):

20 CF3 (CF2) zCH2CH2 (R18) aSiX4-a (VII)

in which:

-R18 represents CH3-, C2H5-, CH3O- or C2H5O-,

-X represents CH3O- or C2H5O-,

- Z is between 0 and 15 and a is between 0 and 3.

25 The fluoroalkyl silanes can be selected particularly from among a non-limiting list especially comprising trifluoropropyltrimethoxysilane, tridecafluorooctiltrimetoxisilano, heptadecafluorodeciltrimetoxisilano, heptadecafluorodecilmetildimetoxisilano, trifluoropropiltrietoxisilano, tridecafluorooctiltrietoxisilano, heptadecafluorodeciltrietoxisilano, heptadecafluorodecilmetildietoxisilano and the like, particularly trifluoropropyltrimethoxysilane tridecafluorooctiltrimetoxisilano and heptadecafluorodeciltrimetoxisilano, and even more particularly trifluoropropyltrimethoxysilane and tridecafluorooctiltrimetoxisilano.

Couplers based on silane can be selected from a γ-glycidoxypropylmethyldimethoxysilane non-limiting list especially comprising vinyltrimethoxysilane, vinyltriethoxysilane, γ-aminopropyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γmercaptopropiltrimetoxisilano, γ-methacryloxypropyltrimethoxysilane, N-ß- (aminoethyl) -γ-aminopropyltrimethoxysilane, and γ-chloropropyltrimethoxysilane, and the like.

Titanate-based couplers may be selected from the list comprising isopropyltearoyl titanate, isopropyltris titanate (dioctyl pyrophosphate), isopropyltris titanate (N-aminoethylaminoethyl), tetraoctylbis titanate (dithridecyl phosphate), tetrakis titanate (2, 2-diaryloxymethyl-1-butyl) bis (ditridecyl) phosphate, bis (dioctyl pyrophosphate) oxyacetate titanate and bis (dioctyl pyrophosphate) ethylene titanate, and the like.

The aluminate-based couplers can be selected from acetoalkoxyaluminium diisopropoxide, aluminum diisopropoximonoethyl acetoacetate, aluminum trisethyl acetoacetate and aluminum trisacetylacetonate, and the like.

The zirconate-based couplers can be selected from a list that particularly comprises zirconium tetrakisacetylacetonate, zirconium dibutoxybisacetylacetonate, zirconium tetrakisethylacetoacetate, zirconium tribuutoximonoethyl acetoacetate and zirconium tributoxyacetylacetate, and the like.

The compounds used as a binder may in particular have a molecular mass that can be between 300 and 100,000.

In order to obtain a layer that coats the mineral cores evenly, the binder is preferably presented in a liquid or water soluble form or in various solvents.

The amount of binder may be between 0.01 and 15%, particularly between 0.02% and 12.5% and, in particular, 0.03 and 10% by weight (calculated with respect to C or Si) with respect to to the weight of the particles that constitute the core and the binder. For more details on how to calculate the relative amount of binder, reference can be made to patent application EP 1 184 426 A2.

ORGANIC PIGMENT

The organic pigment can be selected, for example, from aniline black, azo yellow, quinacridone, carmine, phthalocyanine blue, sorghum red, blue pigment: CI 42090, 69800, 69825, 73000, 74100, 74160, yellow pigment: CI 11680, 11710, 15985, 19140, 20040, 21100, 21108, 47000, 47005; green pigment: CI 61565, 61570, 74260; Orange pigment: CI 11725, 15510, 45370, 71105; red pigment: CI 12085, 12120, 12370, 12420, 12490, 14700, 15525, 15580, 15620, 15630, 15800, 15850, 15865, 15880, 17200, 26100, 45380, 45410, 58000, 73360, 73915, 75470; black pigment: CI 77266.

The mass ratio of the organic pigment may be, for example, between 1 and 500 parts by weight, particularly between 1 and 400 parts by weight, even more particularly between 1 and 300 parts by weight, even more particularly between 1 and 200 parts by weight, particularly between 1 and 100 parts by weight, or even between 1 and 75 parts by weight, for example, between 1 and 50 parts by weight, per 100 parts by weight of the mineral core.

COMPOSITE PIGMENT PREPARATION

The composite pigment can be advantageously prepared by the procedure described in patent application EP 1 184 426 A2.

Initially, the particles with which it is intended to constitute the mineral core are mixed with the binder.

In order for the binder to adhere uniformly to the surface of the mineral core, it is preferred to previously treat said particles in a mill in order to disintegrate them.

Mixing and stirring conditions are selected such that the core is uniformly coated with binder. Such conditions can be regulated in such a way that the linear load is between 19.6 and 19,160 N / cm, in particular between 98 and 14,170 N / cm, and even more particularly, between 147 and 980 N / cm; the treatment time is particularly between 5 minutes and 24 hours, and even more particularly between 10 minutes and 20 hours; The centrifugation speed can be between 2 and 1,000 rpm, particularly between 5 and 1,000 rpm, and even more particularly between 10 and 800 rpm.

After the binder has coated the mineral core, the organic pigment is added and mixed with stirring so that it adheres to the binder layer.

The addition procedures can be, for example, a blow addition in large quantity, in continuous or in small quantities.

Mixing and stirring, either of the mineral cores with the binder or of the organic pigment with the mineral cores coated with the binder, can be performed using equipment that can apply a spatial shear force and / or compression to the powder mixture . Such equipment is, for example, wheel mixers, leaf mixers and the like. Wheel mixers are particularly suitable. Patent application EP 1 184 426 A2 provides a list of equipment that may be suitable.

EXAMPLES

Cosmetic compositions comprising compound pigments with the formulations indicated below can be prepared, said compositions being prepared in accordance with the conventional preparation processes used in the field of cosmetics.

EXAMPLE 1: Nail polish (solvent based)

Nitrocellulose 19% N-ethyl-o, p-toluenesulfonamide 6% Tributyl Acetyl Citrate 6% Rheological agent (hectorite) 1.2% Composite pigment or pigments according to the invention 2% Isopropanol 8% Ethyl acetate / butyl acetate csp 100%

EXAMPLE 2: Nail polish (water based)

Latex (PU, 35% solids content) 72.5% Gelifier (Laponite XLS) 1.2% Pigment or compound pigments according to the invention 1% 100% csp water

EXAMPLE 3: Lipstick

2% microcrystalline wax Ozoquerite 5% Candle wax 7% 3% carnauba wax 18% capric / caprylic acid triglycerides 10% Octyldodecanol 6% lanolin oil 6% acetylated lanolin oil Composite pigment or pigments according to the invention 9% 0.5% fragrance Castor oil csp 100%

EXAMPLE 4: Base

Oil phase

- Surfactant marketed under the trade name “Abil WE 09” by Goldschmidt 8%

-Cyclomethicone 23%

-Isododecano 10%

-Pigment or pigments according to the invention 10%

-5% powder nylon

Aqueous phase

- Demineralized water

42%

- Magnesium sulphate

one%

- preservatives

one%

EXAMPLE 5: Mascara

- Paraffin

2%

- Carnauba wax

4%

- Bee wax

8%

-Polyvinyl laurate (Mexomer PP from Chimex) 0.8%

- Copolymer of vinyl acetate / allyl stearate (65/3 5) 2%

-1% rice starch

-Bentone 4%

-2% Propylene Carbonate

-Pigment or pigments according to the invention 4%

-Csp preservatives

-Isododecano csp 100%

EXAMPLE 6: Hair Dye

- Pigment or pigments according to the invention 0.5%

-Hydroxylethylcellulose 0.768%

- Non-ionic surfactant: alkyl polyglucoside (50/50 C8 / C10) in the form of 60% aqueous solution 6%

-8% Benzyl alcohol

-Polyethylene glycol (8EO) 12%

- Aqueous solution of ammonia csp pH 9%

-Csp preservatives

- 100% demineralized water

A composite pigment comprising a mineral core of titanium dioxide is used, said azo yellow pigment and the binder being methyltriethoxysilane.

It should be appreciated that the invention is not limited to the working examples mentioned above.

In particular, it is possible to use compound pigments according to the invention to prepare cosmetic compositions with formulations other than those mentioned above.

The compound pigment can also be used to color a dermatological composition.

In the present description, including the claims, the term "comprising a" should be seen as a synonym for "comprising at least one", unless otherwise specified.

It should be noted that the indicated ranges comprise the limits, unless otherwise specified.

Claims (16)

1. Use of a composition comprising, in a physiologically acceptable medium, at least one compound pigment comprising: -a mineral core made of titanium oxide,

-

 at least one organic pigment that covers at least partially the mineral core, and

-

 at least one binder selected from the group consisting of silicone compounds, polymeric and oligomeric compounds or the like, and in particular from organosilanes, fluoroalkyl organosilanes and polysiloxanes, and couplers based on silane, titanate, aluminates or zirconates, and mixtures thereof, to fix the organic pigment on the mineral core,

for the makeup of the skin, lips or teguments.

2.

 Use according to claim 1, characterized in that the organic pigment is selected from the group consisting of the following pigments (listed according to their color index): blue pigment: CI 42090, 69800, 69825, 73000, 74100, 74160; Yellow pigment: CI 11680, 11710, 15985, 19140, 20040, 21100, 21108, 47000, 47005; green pigment: CI 61565, 61570, 74260; Orange pigment: CI 11725, 15510, 45370, 71105; red pigment: CI 12085, 12120, 12370, 12420, 12490, 14700, 15525, 15580, 15620, 15630, 15800, 15850, 15865, 15880, 17200, 26100, 45380, 45410, 58000, 73360, 73915, 75470; black pigment: CI 77266.

3.

 Use according to any of the preceding claims, characterized in that the mineral core is colored.

Four.

 Use according to any of the preceding claims, characterized in that the mass proportion of the compound pigment in the composition is between 0.1% and 20%, particularly between 0.1% and 15%, and even more particularly between 0.5% and 10% by weight with respect to the total weight of the composition.

5.

 Use according to any of the preceding claims, characterized in that the composition is free of uncoated TiO2 particles.

6.

 Use according to any of the preceding claims, characterized in that the size of the composite pigment particles is between 0.001 and 150 µm, preferably between 0.01 and 50 µm, more preferably between 0.01 and 25 µm and even more preferably between 0 , 05 and 10 µm.

7.

 Use according to claim 8, characterized in that the composite pigment particles have a size of less than 2 µm.

8.

 Use according to claim 7, characterized in that the composite pigment particles have a size less than or equal to 1 µm.

9.

Use according to any of the preceding claims, characterized in that the density of the mineral core is higher than that of the organic pigment.

10.

 Use according to claim 1, characterized in that the density of the compound pigment is higher than that of the organic pigment.

eleven.

 Use according to claim 1, characterized in that the organic pigment is fixed to the mineral core without any covalent bond.

12.

 Use according to any of the preceding claims, characterized in that the composition comprises at least one cosmetic or dermatological active agent.

13.

 Use according to any of the preceding claims, characterized in that the composition comprises at least one fatty substance, a wax, a rubber or a film-forming polymer.

14.

 Use according to any of the preceding claims, characterized in that the composition is in solid or semi-solid form.

fifteen.

 Use according to any of the preceding claims, characterized in that the composition is in liquid, pasty or gelled form.

16.

 Lipstick comprising, in a physiologically acceptable medium, at least one compound pigment comprising:

-a mineral core made of titanium oxide,

-

 at least one organic pigment that covers at least partially the mineral core, and

-

 at least one binder selected from the group consisting of silicone compounds, polymeric and oligomeric compounds or the like, and in particular from organosilanes, fluoroalkyl organosilanes and polysiloxanes, and couplers based on silane, titanates, aluminates or zirconates, and mixtures thereof, to fix the organic pigment on the mineral core.