FR2930430A1 - Cosmetic treatment, useful for slimming, comprises applying a layer of mixture having first composition having exothermic metal salt in anhydrous medium and second composition comprising slimming agent, in aqueous medium - Google Patents

Abstract

Cosmetic treatment comprises applying at least one layer of a mixture comprising a first composition comprising at least one exothermic metal salt, in anhydrous medium; and a second composition B comprising at least one slimming agent, in an aqueous medium, on keratin materials, where the mixture is obtained either extemporaneously before the application on keratin materials, or simultaneously on keratin materials. Independent claims are included for: (1) a cosmetic product comprising at least one first and the second cosmetic composition, separately from each other; and (2) a packaging set and distribution of compositions forming the product, comprising at least two independent compartments containing the compositions, which are distributed in two separate compositions or in mixture.

Description

Cosmetic product comprising a heating composition and a slimming composition

The present invention aims to provide compositions intended more particularly for the care and / or removal of makeup keratin materials. Many slimming compositions are known, for example having a draining action, that is to say reducing the retention of water in the epidermis and / or the superficial dermis, and / or acting by limiting the lipogenesis or promoting the lipolysis.

The action of topically acting slimming compositions may be more or less effective because of the difficulty of the slimming agent in reaching the deep layer of the skin (hypodermis) in which the adipocytes are located.

It is therefore sought to improve the bioavailability of certain slimming active agents, so as to increase the slimming efficiency of these compositions.

The Applicant has discovered that it is possible to achieve this goal by combining a high-salt-effect heating composition producing an exothermic reaction when contacted with an aqueous medium, and an aqueous composition comprising an agent. slimming. When the two compositions are brought into contact, an exothermic reaction occurs, which causes a rise in temperature and which promotes the penetration of the slimming agent into the skin barrier.

Thus, the present invention relates, principally, to a cosmetic slimming treatment method consisting in applying to the keratin materials at least one layer of a mixture of: a first composition A comprising, in an anhydrous medium, at least one exothermic metal salt and - a second composition B comprising, in an aqueous medium, at least one slimming agent, said mixture being obtained either extemporaneously before application to the keratin materials, or simultaneously with its application to keratin materials.

According to one embodiment, the compositions A and B are mixed extemporaneously and then the mixture is applied to the keratin materials.

This is why the subject of the invention is a cosmetic process for coating keratinous substances consisting of: a. extemporaneously mixing: at least one first composition comprising A comprising, in an anhydrous medium, at least one exothermic metal salt and at least one second composition B comprising, in an aqueous medium, at least one slimming agent, b. to apply on said keratinous materials at least one layer of said mixture.

According to one variant, at least one layer of the composition A and at least one layer of the composition B is applied to the keratin materials, the mixture of the compositions A and B thus being applied during application to the keratin materials. This is why the invention also relates to a cosmetic process for coating keratin materials, comprising the application to keratin materials: a. at least one layer of a first composition A comprising, in an anhydrous medium, at least one exothermic metal salt; b. at least one layer of a second composition B comprising, in an aqueous medium, at least one slimming agent.

The invention also relates to a cosmetic product comprising, separately from one another, at least a first and a second cosmetic composition and wherein: the first composition A comprises, in an anhydrous medium, at least one salt exothermic metal and - the second composition B comprises, in a physiologically acceptable aqueous medium, at least one slimming agent.

According to a particular embodiment, the first and second compositions are packaged separately one in the other, but joined in a single packaging assembly. According to another embodiment, the first and second compositions are packaged separately from one another in separate packaging units. The present invention further relates to a set of packaging and dispensing compositions forming a product according to the invention, said set comprising at least two independent compartments respectively comprising each of said compositions and being adjusted to the distribution of the two compositions so separated or mixed. According to an alternative embodiment, the mixture of the compositions is carried out within said assembly just before use and therefore before application to at least one keratin material. According to another variant embodiment, the mixture of the two compositions is made extemporaneously outside said assembly either on a particular support, such as, for example, a massage apparatus intended to promote the penetration of the composition, or directly onto the keratin materials, in particular the skin, to undergo the slimming treatment.

If necessary, a step of rinsing with water treated keratin materials, in particular the skin, may take place.

The process according to the present invention is particularly advantageous insofar as it makes it possible to combine the advantages of the conventional compositions while avoiding their respective defects. Its performance is significantly increased compared to a conventional slimming composition. In particular, this product, which does not require contacting the two compositions forming it at the moment of their use, that is to say in an extemporaneous manner, proves to have an improved power compared to that observed with a single composition formed from the respective components of the first and second compositions according to the invention. The first and second compositions each comprise a physiologically acceptable medium, that is to say a non-toxic medium that can be applied to keratin materials of human beings, and that has a pleasant appearance, odor and feel. .

FIRST COMPOSITION A

The composition A comprising at least one metal salt used in the various uses, kits and processes mentioned above is exothermic, that is to say that it has a heating effect, and therefore that the user feels a heating when the first and second mixture is applied to the wet or moistened skin. It is a composition whose temperature in the presence of water (water supplied via the second composition) can rise several degrees (one to twenty degrees) instantaneously.

The composition according to the invention consists of an anhydrous medium. By anhydrous is meant here an almost anhydrous medium, that is to say generally comprising less than 6% by weight of water, preferably less than 4% by weight of water, and even more preferably less than 1% by weight. of water relative to the total weight of the composition. It is preferably completely anhydrous and therefore free of water.

As this composition is a cosmetic composition and therefore intended for topical application, it comprises a physiologically acceptable medium, that is to say compatible with the skin, the mucous membranes and / or the keratinous fibers. a) Exothermic metal salts

The metal salts used in the present invention are salts with exothermic properties, i.e., releasing heat when moistened. They are selected in particular from alkaline earth metal salts, magnesium salts and mixtures thereof.

As alkaline earth metal salts, mention may in particular be made of calcium salts and, more particularly, calcium halides such as calcium iodide, chloride and bromide. It is preferably calcium chloride.

As magnesium salts, mention may in particular be made of magnesium sulphate. It is also possible to use a mixture of several salts.

According to a preferred embodiment of the invention, the exothermic metal salt is selected from magnesium sulphate, calcium chloride and mixtures thereof. According to one embodiment, the amount of metal salt (s) is advantageously greater than or equal to 10% by weight, preferably greater than or equal to 15% by weight relative to the total weight of composition A.

The amount of salt (s) metal (s) may range, for example, from 10 to 50% by weight, preferably from 15 to 40% by weight and better still from 15 to 25% by weight relative to the total weight of composition A .

b) Hydrophilic silica

According to one embodiment, the composition A according to the invention comprises one or more hydrophilic silicas. The amount of hydrophilic silica (s) may range, for example, from 0.1 to 20% by weight, preferably from 0.5 to 15% by weight and better still from 1 to 10% by weight relative to the total weight of the composition.

Hydrophilic silica in the present application is understood to mean both pure hydrophilic silicas and particles coated with hydrophilic silica.

The hydrophilic silicas which can be used in the composition of the invention are preferably amorphous and may be of pyrogenic origin or of precipitated origin. They are generally in powder form.

The fumed silicas are obtained by pyrolysis in continuous flame at 1000 ° C of silicon tetrachloride (SiCl4) in the presence of hydrogen and oxygen. The precipitated silicas are obtained by reaction of an acid with alkali silicate solutions, preferably sodium silicate.

According to a preferred embodiment of the invention, the hydrophilic silica is chosen from silicas having a specific surface area of 30 to 500 m 2 / g, and a number average particle size ranging from 3 to 50 nm. These are more particularly hydrophilic silicas described in Tables (1) and (2) below, and mixtures thereof.

Table (1) Name AEROSIL 90 AEROSIL 130 AEROSIL 150 AEROSIL 200 15 25 commercial (Company (Company (Company Degussa-Hüls Degussa-Hüls) Degussa-Hüls) Degussa-Hüls) Mode Pyrogenation Pyrogenation Pyrogenation Generation Pyrogenation Surface BET 90 15 130 25 150 15 200 15 (m2 / g) Size 20 16 14 12 average particle size (nm) Note size of aggregates: 10-30 and 200 p Table (2) Name AEROSIL 300 AEROSIL 380 AEROSIL OX 50 SILICE FK 320 commercial (Company (Company (Degussa-Hüls) Company Degussa-Hüls) (Degussa-Hüls Company) Mode Pyrogenation Pyrogenation Pyrogenation Production Precipitation Surface BET 300 30 380 30 50 25 170 25 (m2 / g) Size 7 The hydrophilic silica used in the composition of the invention may also consist of a particle totally or partially covered with silica, in particular of a mineral particle totally or partially coated with silicic acid. e, such as silica beads containing titanium oxide, sold under the name TORAYCERAM S-IT by the company Toray; silica-alumina microspheres containing titanium oxide (size: 105 14), sold under the name Z-LIGHT-SPHERE W 10128 by the company Zeelan, amorphous precipitated synthetic silica / titanium oxide particles (size : 106-500 14, sold under the name NEOSIL PC20S by Crosfield, Nylon-6-silica-titanium oxide fibers (length 2 mm and thickness of 2 denier), marketed under the name FIBERLON Y2 by the company Wackherr, the silica coated with titanium dioxide and coated with porous silica (85/5/10) (size: 0.6), sold under the name ACS-0050510 by the company SACI-CFPA, titanium nano-oxide anatase treated alumina and 40% silica in water (size: 60 nm, monodisperse), sold under the name MIRASUN TIW 608 by the company Rhodia Chimie CRA, the anatase titanium nanooxide oxide (60 nm) coated with silica / alumina / Cerium IV 15/5/3 in dispersion 32% aqueous, marketed under the name MIRASUN TIW 1608 by Rhodia Chimie CRA; anatase titanium nano-oxide treated alumina and silica (34 / 4.3 / 1.7) in a 40% aqueous dispersion, sold under the name Tioveil AQ-N by the company Uniqema; silica-coated titanium nano-oxide (66/33) (titanium dioxide granulometry: 30 nm, silica thickness: 4 nm), sold under the name MAXLIGHT TS-04 by Nichimen Europe PLC; and silica-coated titanium nano-oxide (80/20) (titanium dioxide granulometry: 30 nm, silica thickness: 2 nm) marketed under the name MAXLIGHT TS-042 by Nichimen Europe PLC.

Pyrogenic silicas, and in particular those sold under the names AEROSIL (INCI name: silica) and especially those sold under the name AEROSIL 200 by the company Degussa-Hüls, are preferably used as hydrophilic silica.

c) Hydrophobic Silica The composition may comprise one or more hydrophobic silicas. The amount of hydrophobic silica (s) may range, for example, from 0.1 to 20% by weight, preferably from 0.5 to 15% by weight and better still from 5 to 15% by weight relative to the total weight. of the composition.

Hydrophobic silica in the present application is understood to mean both pure hydrophobic silicas and particles coated with hydrophobic silica.

The hydrophobic silicas that can be used in the composition of the invention are preferably amorphous and of pyrogenic origin. They are preferably in pulverulent form. The amorphous hydrophobic silicas of pyrogenic origin are obtained from hydrophilic silicas. These are obtained by pyrolysis in continuous flame at 1000 ° C of silicon tetrachloride (SiCl4) in the presence of hydrogen and oxygen. They are then rendered hydrophobic by treatment with halogenated silanes, alkoxysilanes or silazanes. Hydrophobic silicas differ from hydrophilic starting silicas by, inter alia, lower silanol group density and smaller water vapor adsorption.

According to a preferred embodiment of the invention, the hydrophobic silica is chosen from silicas having a specific surface area of 50 to 500 m 2 / g, and a number average particle size ranging from 3 to 50 nm. It is more particularly the hydrophobic silicas described in Table (3) below, and their mixtures.

Table (3) Name AEROSIL AEROSIL AEROSIL AEROSIL AEROSIL commercial R202 R805 R812 R972 R974 (Company (Company (Company (Company Degussa- Degussa- Degussa- Degussa- Hüls) Hüls) Hüls) Hüls) Surface BET 90 20 The average particle size (nm) The hydrophobic silica used in the composition of the invention may also consist of a particle totally or partially covered with silica, in particular of a mineral particle totally or partially covered with hydrophobic silica, such as pigments and metal oxides covered with hydrophobic silica. These particles may also have optical properties in the product as on the skin, for example they may have a mattifying or slightly whitening effect.

The hydrophobic silica used is preferably a hydrophobic fumed silica treated surface-treated with a dimethylsiloxane, such as that marketed under the name AEROSIL R974 (INCI name: Silica Dimethyl Silylate) by the company Degussa-Hüls.

According to one embodiment, the composition A comprises at least one hydrophilic silica and at least one hydrophobic silica, as described above.

d) Polyols According to a preferred embodiment of the invention, the composition A of the process according to the invention also contains at least one polyol because the polyols complete the exothermic action of the salts.

As polyols, mention may in particular be made of polyols having at least 2 hydroxyl groups and at least 3 carbon atoms, such as glycerine, diglycerine, and glycols such as propylene glycol, dipropylene glycol, butylene glycol, hexylene glycol, polyethylene glycol and polyethylene glycols with a molecular weight of less than 600 such as PEG-8 (or Polyethylene 400), sugars such as sorbitol, and mixtures thereof.

As polyols, glycerol, butylene glycol, propylene glycol, dipropylene glycol, PEG-8 and mixtures thereof are preferably used.

The amount of polyol (s) depends on the amount of salts present in the composition and the desired heating effect. It may range, for example, from 0.5 to 80% by weight, preferably from 5 to 75% by weight, better still from 10 to 70% by weight and even more preferably from 20 to 65% by weight and even more preferably from 30 to 60% by weight. % by weight relative to the total weight of composition A.

e) Anhydrous Medium The composition A according to the invention preferably comprises an oily medium comprising at least one oil. The amount of oil (s) can range, for example, from 5 to 80% by weight, preferably from 10 to 60% by weight, better still from 10 to 40% by weight relative to the total weight of the composition.

The term "oil" means a fatty substance which is liquid at ambient temperature (25 ° C.) and atmospheric pressure.

As oils that can be used in the composition of the invention, mention may be made, for example, of: hydrocarbon-based oils of vegetable origin, such as liquid triglycerides of fatty acids containing from 4 to 10 carbon atoms, such as triglycerides of heptanoic acids or octanoic or, for example, sweet almond, sunflower, maize, soya, squash, coriander, grape seed, sesame, hazelnut, apricot (Prunus Armenica Cil), macadamia , arara, rUniqeman, avocado, triglycerides of caprylic / capric acids such as those sold by the company Stearineries Dubois or those sold under the names Miglyol 810, 812 and 818 by the company Dynamit Nobel, jojoba oil , shea butter oil; esters and synthetic ethers, in particular of fatty acids, such as the oils of formulas R'COOR2 and R'OR2 in which R 'represents the residue of a fatty acid containing from 8 to 29 carbon atoms, and R2 represents a hydrocarbon chain, branched or unbranched, containing from 3 to 30 carbon atoms, for example Purcellin oil or 660084 PCL-LIQUID from SYMRISE (a mixture of cetylstearyl ethyl 2 hexanoate and myristate of isopropyl), isononyl isononanoate, isopropyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate (octyl palmitate), octyl-2-dodecyl stearate, octyl-2-dodecyl erucate, isostearyl isostearate; hydroxylated esters such as isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate, heptanoates, octanoates, decanoates of fatty alcohols; polyol esters, such as propylene glycol dioctanoate, neopentyl glycol diheptanoate and diethylene glycol diisononanoate; and pentaerythritol esters such as pentaerythrityl tetraisostearate; linear or branched hydrocarbons of mineral or synthetic origin, such as paraffin oils, volatile or not, and their derivatives, petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parleam oil; fatty alcohols having from 8 to 26 carbon atoms, such as cetyl alcohol, stearyl alcohol and their mixture (cetearyl alcohol), octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, oleic alcohol or linoleic alcohol; partially fluorinated hydrocarbon oils and / or silicone oils such as those described in document JP-A-2-295912. As fluorinated oils, mention may also be made of perfluoromethylcyclopentane and perfluoro-1,3-dimethylcyclohexane, sold under the names "FLUTEC PC1" and "FLUTEC PC3" by BNFL Fluorochemicals; perfluoro-1,2-dimethylcyclobutane; perfluoroalkanes such as dodecafluoropentane and tetradecafluorohexane, sold under the names "PF 5050" and "PF 5060" by the company 3M, or bromoperfluorooctyl sold under the name "Foralkyl" by the company Atochem; nonafluoromethoxybutane sold under the name "MSX 4518" by the company 3M and nonafluoroethoxyisobutane; perfluoromorpholine derivatives, such as 4-trifluoromethyl perfluoromorpholine sold under the name "PF 5052" by the company 3M; silicone oils such as volatile or non-volatile polymethylsiloxanes (PDMS) with a linear or cyclic silicone chain, which are liquid or pasty at room temperature, in particular cyclopolydimethylsiloxanes (cyclomethicones) such as cyclohexasiloxane and cyclopentasiloxane; polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, during or at the end of the silicone chain, groups having from 2 to 24 carbon atoms; phenyl silicones such as phenyltrimethicones, phenyldimethicones, phenyltrimethylsiloxydiphenylsiloxanes, diphenyl-dimethicones, diphenylmethyl-diphenyltrisiloxanes, 2-phenylethyltrimethylsiloxysilicates, and polymethylphenylsiloxanes; - their mixtures.

The term "hydrocarbon-based oil" in the list of oils mentioned above, any oil predominantly comprising carbon and hydrogen atoms, and optionally ester, ether, fluoro, carboxylic acid and / or alcohol groups.

In addition to the oils mentioned above, the composition of the invention may contain other fatty substances, such as fatty acids having 8 to 30 carbon atoms, such as stearic acid; silicone resins such as trifluoromethyl-C1-4-alkyldimethicone and trifluoropropyldimethicone; silicone gums (INCI name: Dimethiconol) alone or in admixture with a silicone oil, such as the product marketed by Dow Corning under the name Dow Corning 1501 Fluid, which is a mixture of dimethiconol and cyclopentasiloxane in a proportion of 14. , 7 / 85.3. (dimethiconol); silicone elastomers such as those marketed under the names KSG by Shin-Etsu; waxes, for example mineral waxes, waxes of animal origin, such as beeswax, waxes of plant origin, hydrogenated oils which are concretes at 25 ° C., fatty esters and concrete glycerides at 25 ° C. synthetic waxes such as polymethylene wax, silicone waxes; and mixtures thereof According to one embodiment, the composition A comprising the exothermic metal salt may further comprise at least one foaming surfactant.

Additives The first composition A may, in addition, contain one or more other additives, especially lipophilic, conventionally used in cosmetic compositions.

Exothermic compounds other than salts and polyols, for example zeolites which are silicoaluminates, may be mentioned in particular. Examples of zeolites that may be mentioned are activated zeolites, for example zeolites A, zeolites X, such as those sold by the companies Fluka and Union Carbide, MAP zeolites as described in document EP-A-384070, activated zeolites A as described in document EP-A-187912 and in particular those sold under the name Advera 401 N and Advera 402N by the company PQ Corporation.

Surfactants may also be mentioned as additives; the perfumes ; conservatives ; antioxidants; sequestering agents the charges ; dyes, cosmetic or dermatological active agents, or mixtures thereof. These adjuvants are used in the usual proportions of the cleaning and / or care compositions, and for example from 0.01 to 10% of the total weight of the composition. These adjuvants must be of a nature and used in such quantity that they do not disturb the properties desired for the composition of the invention.

SECOND COMPOSITION B The second composition B comprises at least one slimming agent. By slimming agent is meant in particular a lipolytic agent.

The slimming agent may be selected from caffeine, theophylline and its derivatives, theobromine, sericin, asiatic acid, acefylline, aminophylline, chloroethyltheophylline, diprofylline, diniprophylline, etamiphylline and the like. its derivatives, etofylline, proxyphylline; extracts of tea, coffee, guarana, mate, cola (Cola Nitida) and in particular the dry extract of guarana fruit (Paulina sorbilis) containing 8 to 10% of caffeine; extracts of climbing ivy (Hedera Helix), arnica (Arnica Montana 35 L), rosemary (Rosmarinus officinalis N), marigold (Calendula officinalis), sage (Salvia officinalis L), ginseng (Panax ginseng), St. John's Wort (Byperycum Perforatum), Common Snapper (Ruscus aculeatus L), Ulmaria (Filipendula ulmaria L), Orthosiphon (Orthosiphon Stamincus Benth), Birch (Betula alba), Cécropia and Argan; ginkgo biloba extracts, horsetail extracts, escin extracts, cangzhu extracts, chrysanthellum indicum extracts, diosgenin-rich dioscorate extracts or pure diosgenin or hecogenin and their derivatives, Ballote extracts, extracts of Guioa, Davallia, Terminalia, Barringtonia, Trema, Antirobia, the extract of petit grain of bigarrade; an extract of cocoa bean shells (theobroma cacao) such as that sold by Solabia under the name Caobromine. According to a particular embodiment, this composition B is in the form of an oil-in-water emulsion.

The amount of slimming agent can range from 0.1 to 10% by weight relative to the total weight of the second composition.

Aqueous medium

The second composition contains at least, as an aqueous medium, water or an aqueous phase. An aqueous phase contains water mixed with one or more water-soluble compounds such as alcohols, glycerol, propylene glycol.

The water preferably represents 40 to 80% by weight relative to the total weight of the second composition B.

Generally, water is understood to mean pure or demineralised water. However, part of the water used in the compositions of the invention may optionally be selected from mineral or thermal waters.

By mineral or thermal waters, not only natural mineral or thermal waters are designated, but also natural mineral or thermal waters enriched with mineral constituents and / or additional trace elements, as well as mineral and / or trace mineral aqueous solutions. prepared from purified, demineralized or distilled water.

A natural thermal or mineral water used according to the invention may, for example be chosen from Vittel water, the waters of the Vichy basin, Uriage water, Roche Posay water, water from the Bourboule, the water of Enghien-les-Bains, the water of Saint Gervaisles-Bains, the water of Néris-les-Bains, the water of Allevard-les-Bains, the water of Digne, the water of Maizières, the water of Neyrac-les-Bains, the water of Lons-le-Saunier, the Good Waters, the water of Rochefort, the water of Saint Christau, the water of the Fumades and the water of Tercis-les-Bains, the water of Uriagle-les-bains, the water of Avene.

The second composition may, in addition, contain adjuvants usual in the cosmetic or dermatological field, such as hydrophilic or lipophilic gelling agents, hydrophilic or lipophilic active agents other than slimming agents, preservatives (for example phenoxyethanol and parabens), antioxidants solvents, perfumes, fillers and exfoliating agents, UV filters, bactericides, odor absorbers, dyestuffs, salts.

The amounts of these various adjuvants are those conventionally used in the field under consideration, and for example from 0.01 to 20% of the total weight of the composition containing them. These adjuvants, depending on their nature, can be introduced into one or other of the compositions forming the product according to the invention.

According to a particular embodiment of the invention, the composition B according to the invention contains, as fillers, exfoliating particles which will allow the skin to be peeled off. As exfoliating particles, it is possible to use exfoliating or exfoliating particles of mineral, vegetable or organic origin. Thus, it is possible to use, for example, the balls or the polyethylene powder, such as those sold under the name Microthene MN 727 or Microthene MN 710-20 by the company Equistar or the powder marketed under the name Gotalene 120 Incolore 2 by the Dupont company. ; nylon particles such as those sold by Arkema under the name Orgasol 2002 EXD NAT COS; fibers such as polyamide fibers, such as those sold by the company Utexbel under the name Polymamide PULP 12185 SIZE 0.3 MM; polyvinyl chloride powder; pumice stone (INCI name: pumice) such as Eyraud's pumice 3 / B; hulls of crushed fruit stones such as crushed apricot kernels or nut hulls; sawdust; glass beads; alumina (aluminum oxide) (INCI name: Alumina), such as the product marketed under the name Dermagrain 900 by Marketech International, sugar crystals; beads which melt during application to the skin, such as, for example, spheres based on mannitol and cellulose sold under the names Unisphères by Induchem, agar capsules sold under the names Primasponge by the Cognis company, and spheres based on jojoba esters marketed under the names Florasphères by Floratech; and their mixtures.

The composition B according to the invention may also contain other fillers such as, for example, talc, modified starch or not, and in particular the starches esterified with octenylsuccinic anhydride and more particularly the "Aluminum Starch octenyl succinate" such as the product marketed by National Starch under the name Dry-Flo ,.

These fillers (exfoliants and others) may be present in an amount ranging for example from 0.5 to 20% by weight, preferably from 1 to 15% by weight, better still from 1 to 10% and even more preferably from 2 to 5% by weight. by weight relative to the total weight of composition B.

As active agents that can be used in the products of the invention, mention may be made, for example, of water-soluble or liposoluble vitamins such as vitamin A (retinol), vitamin E (tocopherol), vitamin C (ascorbic acid) and its derivatives such as l ascorbyl glucoside, vitamin B5 (panthenol), vitamin B3 (niacinamide), derivatives of these vitamins (especially esters) and mixtures thereof; antiseptics; anti-bacterial active agents such as 2,4,4'-trichloro-2'-hydroxy diphenyl ether (or triclosan), 3,4,4'-trichlorocarbanilide (or triclocarban); seborrheic drugs; antimicrobials such as benzoyl peroxide, salicylic acid, azelaic acid, niacin (PP vit); optical brighteners, and any active agent suitable for the final purpose of the composition, and mixtures thereof. The choice of these active ingredients is adjusted according to the quality chosen for the product according to the invention, in particular so that they do not interfere with the desired heating and slimming effect.

According to one embodiment, the second composition used in the process according to the invention is in the form of an aqueous spray.

According to one embodiment, the second composition is an oil-in-water emulsion.

According to one embodiment, the first and second compositions are packaged separately in separate sets of packages and can be marketed separately or within the same product as defined above.

According to one embodiment, the first and second compositions are packaged in separate manners in separate sets of packages. For example, the first composition is in the form of one and the second composition is in the form of an aqueous spray.

According to another embodiment, the first and second compositions are packaged separately one in the other, but joined in a single package.

Thus, the invention also relates to a packaging assembly. More particularly, this set comprises at least: a first compartment containing a first composition A comprising, ii. a second compartment containing a second composition B, said second compartment being sealed from the first, and iii. means for allowing the contacting, in particular extemporaneous, of the two compositions. Such an assembly advantageously allows the extemporaneous contact of its two compositions, separately packaged respectively in the first and second compartments 25 forming said set. This set may also be provided with means allowing the communication of the first and second compartments and therefore of their respective contents. The assembly is also advantageously provided with a means conducive to the distribution of the mixture of the two compositions. More specifically, the compositions A and B used for the implementation of the invention are packaged separately inside two compartments, formed either by two separate containers or inside a unitary device. By unitary device is meant a device by which the two compartments are integral with each other. Such a device can be obtained by a method of molding in one piece of the two compartments, in particular a thermoplastic material. It can also result from any form of assembly, especially by gluing, welding, or other snap. According to a first embodiment, the two containers are independent of one another. Such containers may be in various forms. This may include tubes, bottles or cans. One and / or the other of the containers may be surmounted by a manually operated pump surmounted by a push button for the actuation of the pump and the distribution of the composition via at least one dispensing orifice. Alternatively, one and / or the other of the containers are pressurized, in particular by means of a propellant, in particular a propellant. In this case, the (or) container (s) is (are) equipped with a valve surmounted by a push button equipped with a nozzle or other means of diffusion for the distribution of the product. The propellant may be in admixture with the composition to be dispensed or separated, in particular via a piston able to slide inside the container, or via the flexible walls of a pocket inside which the composition is arranged. The containers may be made of various materials: plastic, glass, or metal. According to a preferred embodiment, the two compositions are contained within a unitary device.

Alternatively still, the two compartments are formed of two concentric compartments formed inside a tube, and optionally are surmounted by a pump without air intake equipped with a push button with one or two dispensing orifices. Inside the tube may be provided a piston that goes up towards the pump as the compositions are taken from the inside of the containers.

Such modes of distribution are used in particular for the distribution of toothpastes. Still other devices can be used for the practice of the present invention, the essential being that they can allow the separate packaging of the two compositions and their distribution separately or in mixture.

By way of example, the two compositions are packaged inside two compartments formed inside a single flexible bag, the two compartments being separated by a rupture zone which can be broken at the moment of use. , in particular in response to pressure exerted at a specific location of the bag.

The invention therefore relates in particular to an assembly, wherein the compositions A and B are packaged inside two compartments formed by two separate containers.

For example, devices as described in documents US Pat. No. 5,833,121, US Pat. No. 4,773,562 and US Pat. No. 6,672,483 may be used. For example, the dual-compartment tube-type packaging, for example the dual tube, may be used. The products according to the invention can in particular constitute slimming products of the skin (body, face).

Another subject of the invention consists in the cosmetic use of a product as defined above, as a slimming product. The examples which follow serve to illustrate the invention without, however, being limiting in nature. The quantities indicated are in% by weight of raw material (and not of active ingredient) unless otherwise stated.

Example 1: Double compartment product

1 / First composition A comprising an exothermic salt Magnesium sulfate mixture and water (98/2) 20 0/0 Hydrophobic silica (AEROSIL R974) 1 0/0 Hydrophilic silica (AEROSIL 200) 1 0/0 PEG-8 34.8 Glycerin 5% PEG-7 caprylic / capric glyceride 20% Cyclopentasiloxane / Dimethiconol (Dow Corning 1501 Fluid) 15% Polyisobutene hydrogenated 20% Stearyl polyacrylate (Intelimer IPA-13-1) 2% Procedure 25 Mixed at room temperature, the PEG-8 and the glycerine, were added successively by mixing after each addition, the hydrophobic silica, the silicone compound (s), then the hydrophilic silica and the magnesium sulfate. The whole was homogenized with stirring. 2 / Second composition B: O / W emulsion comprising caffeine

Phase A: - caffeine 3% - triethanolamine 0.9% - salicylic acid 0.55% - glycerin 5% - propylene glycol 4% - octane-1,2 diol 0.3% 15 - preservatives 0.25% - water qs 100% Phase B: - cetyl alcohol 0.5% - stearyl alcohol 0.5% - glyceryl isostearate 0.5% Phase C: - Carboxyvinyl polymer sold under the name CARBOPOL 980 by the company NOVEON 0.3% Cross-linked, partially neutralized poly-2-acrylamido-2-methylpropanesulfonic acid with ammonia (HOSTACERIN AMPS CLARIANT) 0.3% - AMPS copolymer / ethoxylated C12-14 alcohol methacrylate (80E) 80 / (Aristoflex LNC from Clariant) 0.5% - Cyclohexadimethylsiloxane 8 cSt 5% Phase D: - Ethanol - Preservative Procedure 5 ° / 0 5 ° / 0 Phase A was heated to 70 ° C (solubilization of caffeine) . Phase B is then heated to 65 ° C, and then phase B is poured into phase A at 65 ° C. Phase C is predispersed at room temperature and is then added with stirring to the mixture of phases A and B reduced to 55 ° C.

The whole is stirred under pale and at room temperature, then phase D is added with stirring.

Each first composition and second composition may be packaged in the same quantity in two separate compartments of a dual compartment tube-type packaging such as the Alcan packaging dual tube 35-25, or double pump bottle type. The compositions are mixed at the outlet of the tube or bottle and the corresponding mixture is applied to the skin.

It has been found that the application of the mixture to the skin results in a rise in temperature by exothermic reaction. This increase in temperature allows vasodilatation of the vessels and thus an improvement in the bioavailability of the slimming agent, here caffeine. The interest of this association can be applied in the field of body care.

EXAMPLE 2 Kit Comprising First and Second Compositions 1 / First Composition A Comprising an Exothermic Salt: PEG-8 Qs 100% Glycerin 5% Hydrophilic Silica (AEROSIL 200) 1.5% PEG-7 Caprylic / Capric Glyceride 2% Fragrance 0.5% Cyclopentasiloxane / Dimethiconol (Dow 10% Corning 1501 Fluid) Hydrophobic silica (AEROSIL R974) 2.5% Magnesium sulfate mixture and 20% water (98/2) Procedure: Mixed at room temperature (25 ° C) PEG-8 and glycerin were added successively with mixing after each addition the hydrophobic silica, the silicone compound, then the hydrophilic silica and the magnesium sulfate. It was homogenized with Raynerie.

2 / Second composition B: Aqueous spray comprising caffeine PHASE I Water qsp Acrylic gelling agent (1) 0.2 Triethanolamine 1.2 Xanthan gum 0.1 AMPS (2) 0.6 Glycerin 4 Propylene glycol 3 Caffeine 4 Salicylic acid 0.6 Horse chestnut extract 0.2 Ginkgo biloba extract 0.05 Legume seed peptides in 0.5 water / glycerol mixture (42%) Cl dye 42090 0.001 PHASE II Dimethicone copolyol (3) 5 Cyclohexadimethylsiloxane 8cSt 5 Acrylic acid / crosslinked alkyl acrylate polymer 0.25 (Pemulen TR-2 of lubrizol) Dimethicone / dimethiconol (Dow Corning 1503 Fluid) Perfume 0.5 PHASE III 1 Ethanol 18 PHASE IV Polyurethane Powder (4) 2 Amorphous Silica Microspheres (1) Carboxyvinyl polymer sold under the name CARBOPOL 980 by NOVEON. (2) Polyacrylamido propanesulfonic acid partially neutralized with ammonia and crosslinked, sold under the name HOSTACERIN AMPS by the company CLARIANT. (3) Mixture of dimethicone copolyol / cyclopentadimethylsiloxane / water (10/88/2) sold under the name DOW CORNING 5225C FORMULATION AID by the company DOW GORNING. (4) Polyurethane powder sold under the name PLASTIC POWDER D-400 by the company TOSHIKI A first layer of the first composition A is applied manually to the area to be treated followed immediately by a layer of the second composition in the form of a spray. The mixture spreads easily and gives a homogeneous heating effect on the treated sone.

Claims (15)

REVENDICATIONS1. Cosmetic slimming treatment method consisting in applying to the keratin materials at least one layer of a mixture: a first composition A comprising, in an anhydrous medium, at least one exothermic metal salt and a second composition B comprising in an aqueous medium, at least one slimming agent, said mixture being obtained either extemporaneously before application to the keratin materials, or simultaneously with its application to keratin materials. 2. Method according to claim 1, characterized in that the exothermic metal salt is selected from alkaline earth metal salts, magnesium salts and mixtures thereof. 3. Method according to any one of the preceding claims, characterized in that the exothermic metal salt is selected from magnesium sulfate, calcium chloride and mixtures thereof. 4. Method according to any one of the preceding claims, characterized in that the amount of metal salt (s) exothermic (s) ranges from 0.1 to 50% by weight relative to the total weight of the first composition . 25 5. Method according to any one of the preceding claims, characterized in that the first composition comprises at least one silica. 6. Method according to any one of the preceding claims, characterized in that the first composition comprises at least one hydrophilic silica and at least one hydrophobic silica. 7. Method according to the preceding claim, characterized in that the amount of silica (s) hydrophilic (s) ranges from 0.1 to 10% by weight relative to the total weight of the first composition. 35 8. Method according to claim 6, characterized in that the amount of silica (s) hydrophobic (s) ranges from 0.1 to 10% by weight relative to the total weight of the first composition. 9. Method according to any one of the preceding claims, characterized in that the amount of slimming agent is from 0.1 to 10% by weight relative to the total weight of the second composition. 10. A cosmetic product comprising, separately from one another, at least a first and a second cosmetic composition and wherein: the first composition A comprises, in an anhydrous medium, at least one exothermic metal salt and the second composition B comprises, in a physiologically acceptable aqueous medium, at least one slimming agent. 11. Product according to the preceding claim, wherein the first and second compositions are packaged separately from one another, but combined in a single package. The product of any one of claims 10 or 11, wherein the first and second compositions are packaged separately from each other in separate packaging units. 13. Product according to one of claims 10 to 12, characterized in that the second composition B is in the form of an aqueous spray. 14. Product according to one of claims 10 to 12, characterized in that the second composition B is in the form of oil in water emulsion 15. A packaging and dispensing assembly of the compositions forming a product according to any one of claims 10 to 13, said assembly comprising at least two independent compartments respectively comprising each of said compositions and being adjusted to the distribution of the two compositions separately or in mixture.35