FR2954146A1 - Process of cosmetic treatment of human keratin fibers, preferably eyelashes, comprises heating external surface of piece of product solid at specified temperature and applying the product thus softened on the fibers to be treated - Google Patents

Abstract

Process of cosmetic treatment of human keratin fibers, comprises: heating external surface of a piece of product solid at temperature >= 40[deg] C by directly contacting heater or keeping near a heater, the product comprising a compound or its mixture which providing a stringy property at heat of dmax >= 5 mm to the product, and heating the localized portion for mainly softening the outer surface; and applying the product thus softened on the fibers to be treated, preferably eyelashes. An independent claim is included for device for conditioning and applying a product (P) for application on human keratin fibers in the form of a solid piece, preferably a stick, comprising: piece of solid product having an external surface; and a heater (102) that can be contacted with the outer surface for heating the piece at a temperature >= 40[deg] C, mainly for softening the outer surface.

Description

The present invention relates to a process for coating keratin fibers with a makeup or care composition, especially mascara. By "mascara" is meant a composition intended to be applied to the eyelashes. It may be an eyelash makeup composition, an eyelash makeup base (also called a base coat) or a composition. to apply on a mascara, called top coat, or else a composition for cosmetic treatment of the eyelashes. Mascara is especially intended for human eyelashes, but also false eyelashes. The term "product" and "composition" are synonyames. In general, the makeup compositions of the eyelashes comprise at least one wax or a mixture of waxes dispersed in an aqueous liquid phase or an organic solvent. They generally have a pasty texture and are packaged in a container comprising a reservoir provided with a wiper and an applicator, in particular in the form of a brush or a comb, and apply by taking the product from the container. reservoir using an applicator, passage of the applicator through the wiper in order to evacuate the surplus product, and placed in contact with the applicator impregnated composition on the eyelashes. For example, US Pat. No. 2,007,245 or FR 2 833 163 discloses mascaras in solid form, termed "mascaras breads", which are compositions comprising a high proportion of waxes, pigments and surfactants, which are water-datable. that is to say that they require, prior to their application on the eyelashes, contacting with an aqueous phase so as to partially solubilize the mascara. The application is made via a brush impregnated with water which is brought into contact with the mascara and the mixture removed is applied to the eyelashes with a brush. US 5,856,653 discloses a heater for melting a mascara residue that has dried and become unusable. No. 5,775,344 describes a packaging and application device for pasty mascara equipped with a heating device. US 2008/0035165 A1 discloses a heating applicator using solid mascara.

US 2007/0286831. discloses a device in which solid mascara is deposited on a heating applicator. US 2005/0150509 A1, US 2007/0286665 A1, US 7,083,347 B2 describe heating applicators.

The publication FR 2 927 782 discloses a process in which a mass of product is softened on the surface with a view to its application on the skin or the lips, as well as devices for its implementation. Application FR 2 914 161 discloses a device wherein solid mascara is melted within an applicator member and dispensed through openings therein. To obtain an effect lengthening eyelashes, it is known from the prior art mascara compositions comprising fibers. These fibers can add a little physical length to eyelashes when they are sufficiently rigid, visible and they are at the end of eyelashes. However, the gain in elongation obtained via such mascaras remains moderate because it is difficult to orient the fibers to stack them end of eyelash. In addition, the presence of fibers can reduce the adhesion of mascara to the eyelashes, increasing the time required for makeup. US2009 / 0020133 A1 discloses a device comprising a heating nozzle on which is mounted a piece of solid product to be melted completely prior to application to the eyelashes. The product may have a hot running character. Another technical route described in EP 1430868 is the use of mascaras having a "spinning" character at room temperature, which are capable of forming, during application to the keratinous fibers and after stretching with the aid of a brush, son in the extension of the eyelashes, without use of a heat source. However, the ability of these mascaras to spin at room temperature does not simplify their use: in particular, when it is taken to be applied, the mascara can form son between the container that contains it and the applicator or between the eyelashes and the applicator. On the other hand, the control of the length of the threads formed on the eyelashes is delicate because the threads do not break spontaneously. In addition, they rarely have sufficient rigidity to remain aligned in the extension of the eyelash and allow a long lasting effect.

The aim of the invention is to propose a novel process for treating eyelashes and other keratinous fibers, all or part of which overcomes the disadvantages of known methods.

According to one of its aspects, the invention relates to a process for the cosmetic treatment of human keratin fibers, for example eyelashes, comprising the steps of: a) reheating on contact with or in the vicinity of a heating device, an outer surface of a piece of solid product at a temperature greater than or equal to 40 ° C, the product comprising at least one compound or mixture of compounds giving it a hot-running character, preferably dmax greater than or equal to 5 mm , so as to heat said piece in a localized manner so as essentially to soften only said outer surface, and 1.0 b) to apply the product thus softened to the fibers to be treated, in particular the eyelashes. The dmax may, for example, be greater than or equal to 7 mm, for example 10 mm, for example 1.5 mm. The invention makes it possible to form eyelash extensions relatively easily. The fact that the piece of product is not completely heated facilitates the breakage of the wires when the piece of product moves away from the surface to which the product is applied. The product preferably contains at least one compound selected from polymers and copolymers comprising at least one alkene monomer, in particular ethylene-based copolymers, and polyvinyl acetate homopolymers. Such polymers are particularly suitable for obtaining the desired spinning. The mass content of such compounds may be between 5% and 80%, preferably between 10% and 70%, relative to the total weight of the product, before application. Thus, independently or in combination with the above, the invention relates, in another of its aspects, to a process for the cosmetic treatment of human keratin fibers, for example eyelashes, comprising the steps of: a) reheating on contact or in the vicinity of a heater, an outer surface of a piece of solid product, the product comprising at least one compound selected from polymers and copolymers comprising at least one alkene monomer, and polyvinyl acetate homopolymers, in order to heat said piece locally so as to essentially soften only said outer surface, and b) to apply the product thus softened to the fibers to be treated, in particular the eyelashes.

The softening may or may not go as far as the local melting of the product, insofar as it is sufficient to obtain the formation of the yarns. The piece of product may have a faith in a stick. According to the invention, the whole product is not melted, at least for the first use. There may be no relative movement between the softened product and the still solid product. when heating the piece of product on the surface. The heated outer surface, for example when the product is in the form of a stick, may be defined by the distal end thereof. Alternatively, the heated outer surface is defined by at least a portion of the side surface of the piece of product, eg stick. The softened outer surface can be brought into contact. of the region to be treated, thus forming an application surface. Thus, the son of product can be attached to the piece of product during their formation. A larger transverse dimension of the rod may be greater than 4 mm, or even 10 mm or 20 mm. The cross section of the piece of product may exceed 12 mm2. The piece of product may have a non-circular cross section, for example oblong or reniform. The piece of product may, for example, have a hardness in shear at 20 ° C greater than 375g / m, or even greater than 5000g / m or greater than 10000g / m, or greater than 12000g / m and in particular between 375g / m g / m and 15000 g / m, according to the method defined below. Higher hardness can improve the mechanical strength of the product and can facilitate its packaging and use. The composition can thus be very "hard" to allow application after easy heating on the eyelashes, in particular a deposit of material by simple contact with the eyelashes, without exerting undue pressure on the eyelash fringe. The product may contain at least one cosmetic active agent, at least one organic or aqueous solvent, at least one coloring agent, in particular a pigment that generates a color by an absorption and / or interference phenomenon. The product may optionally include a thermochromic coloring agent, allowing the user to visualize the warming of the outer surface. The heater used to soften the outer surface of the product is an artificial source of heat, ie a source of heat other than human or animal heat, heat from the sun or heat that may result from friction of the application surface on the keratinous fibers, during the application. The heat source may be other than the heat produced by combustion in the ambient air of a fuel, for example the flame of a lighter or a candle. The supply of heat to the outer surface to heat it causes for example a local rise of at least 5 ° C of its temperature, better at least 10 ° C, or 20 ° C or 30 ° C. The piece of product may keep a core remaining at a temperature of less than or equal to 30 ° C, during application, for an ambient temperature of 20 ° C, at least when the piece of product contains the initial amount of product, The product may be reheated by being exposed to infrared radiation, radio-frequency radiation, heated by blowing hot air, reheated by exposure to ultrasonic vibrations, or heated by heat transfer in contact with or near a hot surface. The latter may bear axially and / or radially against the application surface, for example the end of the stick when the piece of product is in the form of a stick. The heater can heat the product in a controlled manner by means of temperature control. The hot surface can be flexible, if necessary. The piece of product is solid at room temperature (20 ° C), that is to say, it retains the shape that was given to it during manufacture and does not flow under the effect of gravity. The temperature Tf at which the outer surface of the product is heated may be greater than or equal to 40 ° C, for example 50 ° C, for example 60 ° C, for example 65 ° C. The temperature Tf may advantageously be less than or equal to 60 ° C. It can be in particular between 40 ° C and 60 ° C.

The distal end of the piece of product can be heated to temperature Tf. The energy input to soften the outer surface of the product can take place for less than 60 s, better under 30 s, or even less than 10 s. Heating of the product can take place without the product flowing through openings in the device.

These protruding elements can remain integral with the piece of product during application. The protruding elements may be arranged in such a way that the eyelashes contact both the softened outer surface and the protruding elements.

The softened product can be brought into contact with the fibers while the softened product is carried by the piece of product. The softened product may also be brought into contact with the fibers after transfer of the softened product onto a support for the application. The heater may further heat at least one surface of a material other than the product for application. This surface for the application may, for example, include a row of projecting elements. Thus, the method may comprise the step of, during the application of the product, engaging the fibers, for example the eyelashes, between elements projecting from combing the fibers, for example eyelashes. Said projecting elements may, for example, be teeth. Application of the product can take place without the surface of the softened product passing through a wiper. According to another of its aspects, the invention also relates to a device for packaging and applying a product intended for application to human keratinous fibers, for example for carrying out the method as defined above, this product being in the form of a solid piece, in particular of a stick, the product comprising a compound or mixture of compounds giving it a hot-running character, in particular of dmax greater than or equal to 5 mm, for example at 40 ° C, the device comprising: - the piece of solid product, the latter having an outer surface and possibly a support of said piece of solid product; optionally, means for assisting the application / finishing, in particular in the form of teeth, bristles or embossments for, simultaneously with or after the application of the product to the keratinous fibers, smoothing, combing and / or separating the latter, - a heating device that can be brought into contact with or in the vicinity of said outer surface to heat said piece locally to a temperature greater than or equal to 40 ° C, in order essentially to soften only said outer surface.

The product may be as defined above as part of the process presentation. The application / finishing aid means may comprise one or more rows of projecting elements for combing the fibers.

The application / finishing aid means, in particular the row of projecting elements, may be heated by the heating device, for example at a temperature greater than or equal to 30 ° C., or even 40 ° C., or even 50 ° C. ° C. The application / finishing aid means may be arranged or be able to be arranged in the vicinity of the outer surface, in particular around all or part of the latter. The device may also be completely devoid of application / finishing aid means as defined above. The heater may be integral with the piece of product when using the device to apply the product to the fibers. The product can be packaged in a packaging device that can seal tightly. The piece of product can be initially molded into the desired shape, for example rod-shaped, without any reinforcement, or on a frame and / or a gripping part, being supported for example by a rod. When a hot surface is used to heat the product, the hot surface may be able to be traversed by the piece of product, including the rod, having for example an annular shape. The hot surface can still come into contact with or face the application surface of the piece of product, in particular the end face of the product stick or at least a portion of its lateral surface. The hot surface may be flexible and deformed by the piece of product when it comes into contact with each other. The product may be reheated while the piece of product, including the stick, is fully contained in a conditioning device. The product can also be heated while the piece of product, including the stick, is at least partially exposed to ambient air .. The product can be locally heated to a temperature greater than or equal to 40 ° C, or even greater than 45 ° C or higher than 50 ° C. The temperature of the application surface, in particular the end of the stick, should not cause a risk of burning at the time of application. This is why a waiting time between the moment when the end is heated and the application to the keratin materials may possibly be necessary.

The temperature Tf at which the product is initially locally heated at the application surface may be between 40 ° C and 95 ° C, more preferably 45 ° C to 85 ° C, more preferably 45 ° C to 75 ° C. The temperature difference between the heated application surface, in particular the end of the stick or its lateral surface, and the unheated portion, for example the core of the stick, may be greater than or equal to 15 ° C., or even greater or at least 20 ° C, at least at the beginning of the application, or even greater than 30 ° C. The end of the piece of product can be brought into contact with a hot source so that the temperature of this end, at the surface or at least 0.5 mm deep, for example, rises to Hole plus. The temperature T 'r at which the outer surface of the product is heated may be greater than or equal to 40 ° C, in particular greater than or equal to 45 ° C. The temperature Tf can for example be measured on the surface using an infrared pyrometer. During the application of the product, the keratin fibers may optionally be held against the softened product by a counter-surface, which may be at ambient temperature or be heated. The heating of the outer surface of the piece of product can be obtained with the aid of this counter-surface, if necessary. The counter-surface is for example heated by an electrical resistance. The heater may include means for holding the counter surface in a predefined position relative to the piece of product. During the application of the product, a movement of the keratinous fibers relative to the softened product can be obtained by moving the product manually and / or by means of a motorized drive mechanism of the piece of product, for example by rotating it on itself . The rotational movement can be made towards the tip of the eyelashes. If necessary, the movement of the product makes it possible first to expose a certain portion of the surface of the product to a source of heat and then to move the portion thus heated away from the heat source to bring it into contact with the fibers. on which the product can then be deposited. The piece of product, in particular the stick, may be secured, during the application of the product to the keratinous fibers, to a case comprising a mechanism for progressively moving the piece of product, in particular the stick, relative to a surface gripping the case by the user, including a mechanism comprising two rotating parts relative to each other. The movement of the product can be unidirectional or bidirectional, depending on how the case is made. The heating device can heat the piece of product in a localized manner to essentially soften only said outer surface, for example to a depth of 0.5mm to 5mm, better 0.5mn-1 to 2mm. In the case of a heat transfer by conduction, convection or. infrared radiation, the heat is not transmitted to the application surface from the heart of the piece of product, but from the outside. The heating device may be housed in a closure cap of the support, I0 so as to allow the application surface, in particular the end of the stick, to be heated with the cover in place on the support. Alternatively, the heater is housed in a housing on which can be engaged the support, so that the heating can take place when the support is engaged in the housing. The housing may include an opening in which the piece of solid product may be engaged, preferably without the entire support being disposed within the housing. In another variant, the heating device may be integral with the support. The device according to the invention may comprise a control means allowing the user to control the operation of the heating device. This control means may comprise a switch present on the support or on a closure cover of the support. In general, the device may comprise an electrical resistance for heating a surface that can come into contact with or near the application surface. The device may comprise an infrared emitter arranged to subject the application surface, in particular the end of the stick, to infrared light in order to heat it. The heating device may further comprise means for emitting radio-frequency radiation, for example microwaves, making it possible to raise the temperature of the application surface, in particular of the end of the stick. The heater may include a fan for blowing hot air onto the application surface, including the end of the stick.

The heater may include an ultrasonic source for heating the end of the stick. The heating device may comprise at least two components capable of producing, when mixed, an exothermic reaction. The heat thus produced can be transferred to the outer surface for application, particularly to the end of the stick. Measuring hardness in shear To determine the "hardness in shear" of a piece of product according to the invention The "cut butter" method can be used, which consists in cutting a piece of product transversely, in particular with a cylindrical surface, or even a cylindrical surface, for example with a diameter of 8 mm using a wire. 250 μm diameter rigid tungsten by advancing the wire relative to the stick at a speed of 100 mm / min. The hardness corresponds to the maximum shear force exerted by the yarn on the piece of product at 20 ° C., this force being measured by means of a DFGS2 dynamometer marketed by INDELCO-CHATILLON. The measurement is reproduced 6 times. The average of the 6 values read using the dynamometer mentioned above, is expressed in grams. These values are thus between 3 g and 40 g, advantageously between 4 g and 20 g, and preferably between 6 g and 12 g. This operation is performed on the largest length of the section of the piece of product. Then, this value in grams is normalized by this greater length, and for example by the diameter of the piece of product when it is cylindrical, ie 8 mm for example, in order to obtain a value in grams / meter. In other words, the hardness value corresponds to the maximum shear force exerted by the wire measured on the stick at 20 ° C divided by the greatest length of the section of said piece of product, brought into contact with the wire. According to a particular embodiment, the composition according to the invention is characterized in that the hardness in shear is between 375 g / m and 15000 g / m 2, in particular between 5000 g / m and 15000 g / m. The cosmetic composition contains at least one compound or a mixture of compounds, for example a polymer which, when the composition is locally heated, in particular heated to a temperature greater than or equal to 40 ° C., gives said composition a spun, for example drnax greater than or equal to 5 mm.

The spinning character represents the ability of the composition, once subjected to the heat source, to form on the keratin fibers, son which, after stretching with the aid of an applicator, are sufficiently consistent and retain their shape. The use of heat to heat the surface composition makes it easier to control the length of the wires formed in the extension of the eyelashes. In particular, after application of the softened composition and stretching son, they solidify at room temperature in the extension of each eyelash and provide a remarkable elongating effect. The composition may be applied to the upper end of the eyelashes.

Measurement of the spinning nature The running characteristic of the composition is determined using the texturometer sold under the name TA X-T2i by the company RI-IEO, equipped with a mobile controlled temperature, this mobile being a stainless steel heating cartridge Firerod DIV-STL (Watlow Company, France), diameter 3.17 mm and length 60 mm, with a maximum power of 40W at a voltage of 24V, with a K-type thermocouple loc C. The heating cartridge is powered by a 5V I 0.5A LIAS 005-5V DC power supply from Elka-Electronics. Its temperature is regulated by a PTC controller TC48 from Faucigny instrument (France). An attachment appendix has been created to fix the temperature-controlled mobile to the measurement arm of the texturometer.

The measurement is made on son of composition obtained by imposing a vertical displacement of the mobile to contact with a sample of the composition and, after a waiting time in contact, imposing a vertical movement of the mobile up. Since the composition has a hot-running character, a wire is formed between the mobile in the shrinkage phase and the sample of the composition, which wire becomes more consistent under the effect of cooling with ambient air. The measurement of dmax consists of a measurement of the length of the son thus formed after detachment from the surface of the mobile. The protocol is as follows: a) a sample of the composition is prepared by filling at its maximum a stainless steel cup 2 mm thick and 20 mm in diameter, the excess composition being leveled at the surface, b) controlled the temperature of the mobile at 40 ° C, e) the mobile descends at a speed of 10 mm / s until contact with the surface of the composition, d) the mobile is kept fixed for 10 s and then is raised to a speed of 10 mmis. During the removal phase of the mobile, a wire is formed between the composition and e mobile. As the mobile is moved away from the. surface of the composition, the formed wire cools and becomes more consistent. From a certain elongation, the wire is detached from the mobile. The running character or dmax (expressed in mm) corresponds to the length of the wire obtained after breaking, measured with a graduated rule. The measurement of the spinning character is repeated three times for the same composition, in different places of the cup, and a mean of "spinning" dmax is calculated for each composition. Steps b) to d) are repeated for the same composition at a mobile temperature set in step b) of 50 ° C, 60 ° C, 70 ° C, 80 ° C, 90 ° C, respectively. , 100 ° C, 110 ° C, 120 ° C, 130 ° C and 140 ° C.

Among the values of thread that can be obtained at the various temperatures above, it retains as the running character value dmax the highest value. The composition used in the process according to the invention preferably has a spun dmax character of greater than or equal to 5 mm, which can be up to 100 mm, preferably greater than or equal to 15 mm. Preferably, the composition is capable of forming a wire such that, after forming the wire and measuring the dmax according to the protocol indicated above, placing the cup comprising the composition vertically (so that the wire is in a horizontal position, that is to say say subjected to gravity) at least 30 seconds, the wire retains a minimum length of 5 mm (measurable manually to the ruler).

The composition having such a spinning character makes it possible to obtain, during application to the keratinous fibers, a composition yarn in the extension of the eyelash. This wire retains its shape, remains rigid and does not shrink, which allows to obtain an effect of elongation of the eyelash. The composition may be locally raised to the temperature at which it has the spinning characteristic d max, measured as indicated above, i.e., the temperature at which the spinning character is the highest.

Base coat / Top coat The piece of product can be colored or not. In particular, when the product is colorless or has an undesirable color, a second colored composition, such as a conventional mascara, may be applied to the extensions formed by the product previously applied to the eyelashes. If necessary, it is possible to remove the makeup of the second composition alone, without makeup removing all the eyelashes and extensions, so that the threads formed at the end of the eyelashes can be subsequently remodeled, for example with another composition of a different color. It is possible to apply a conventional mascara, for example comprising a film-forming polymer and an aqueous phase and / or an organic solvent phase, prior to the layer of the composition having a spun pattern, so as to facilitate the subsequent removal of the extensions when removing makeup eyelashes.

Compounds capable of conferring on the composition a spinning character The compound (s) contributing to imparting to the composition a spinning character may be hydrocarbon or silicone and advantageously have a thermoplastic behavior.

This or these compounds are preferably solid at room temperature. Advantageously, the compound or compounds themselves have a spun dmax, measured according to the protocol indicated above, greater than or equal to 5 mm. The one or more compounds giving a shuffling character are preferably chosen from: Al Polymers and copolymers comprising at least one alkene monomer, in particular copolymers based on ethylene, Such compounds can be chosen from: the copolymers of alkene and vinyl acetate, especially copolymers of ethylene and vinyl acetate.

In particular, the copolymers of ethylene and vinyl acetate preferably comprising more than 25% by weight may be used. of vinyl acetate relative to the total weight of the polymer.

Examples of ethylene / vinyl acetate copolymers that may be mentioned are those sold under the name ELVAX by the company Du Pont de Nemours and in particular the compounds Elvax 40W, Elvax 140W, Elvax 200W, Elvax 205W, Elvax 210W and Elvax 310.

Mention may also be made of the products sold under the name EVATANE by Arkema, such as Evatane 28-800. Mention may also be made of MELTHENE® Grade H-64101 proposed by the company Tosoh Polymer. copolymers of ethylene and octene, such as, for example, the products sold under the reference "A.F'F" INITY "by Dow Plastics, for example AFEINITY GA 1900 GA 1950. These polymers and The copolymers may be used alone or in admixture with at least one compound selected from the so-called tackifying resins, as described in the Handbook of Pressure Sensitive Adhesive, edited by Donatas Satas, 3rd ed., 1989, pp. 609-619, waxes The tackifying resins 15 may in particular be chosen from rosin (corresponding to the Anglo-Saxon term "Rosie"), rosin derivatives, hydrocarbon resins and mixtures thereof. indene hydrocarbon resins such as resins derived from the majority polymerization of monomer indene and in a minor proportion of monomers chosen from styrene, methyl indene, methylstyrene and their mixtures. These resins may optionally be hydrogenated. They may have a molecular weight ranging from 290 to 1150. As examples of indene resins, mention may be made in particular of the hydrogenated indene / methylstyrene / styrene copolymers sold under the name REGALITE by the company Eastman Chernical, in particular REGALITE R 1100, REGULITE R 1090, REGULITE R-7100, REGALITY 25 R1010 RESIN HYDROCARBON, REGULITE R.1.125 HYDROCARBON RESIN. As mixtures based on ethylene / vinyl acetate copolymer, mention may be made, for example, of the products sold under the name Coolbind by the company National Starch. Mixtures of ethylene / vinyl acetate copolymer and paraffin may also be used. For example, it is possible to use a mixture of 55.5% by weight of ethylene / vinyl acetate copolymer, 44% by weight of paraffin and 0.5% by weight of preservative. These polymers may be in pure form or may be carried in an aqueous phase or an organic solvent phase. BI Polyvinyl acetate homopolymers, preferably having a molecular weight of less than 20000, for example RAVIFLEX BL, 1 S from the company Vinavil. CI Silicone resins These resins are crosslinked organosiloxane polymers. The nomenclature of the silicone resins is known under the name of "MDTQ", the resin being described as a function of the different monorneric siloxane units that it comprises, each of the letters "MDTQ" characterizing a type of unit. The letter M represents the monofunctional unit of formula (CH 3) 3 SiO 1/2, the silicon atom being connected to a single oxygen atom in the polymer comprising this unit. The letter D signifies a difonetional unit (CH3) 2SiO2 / 2 in which the silicon atom is connected to two oxygen atoms. The letter T represents a trifunctional unit of formula (CH3) SiO3 / 2. In the units M, D and T defined above, at least one of the methyl groups may be substituted by a group R other than the methyl group such as a hydrocarbon radical (in particular alkyl) having from 2 to 10 carbon atoms or a phenyl group or else a hydroxyl group. Finally, the letter Q signifies a tetrafunctional unit SiO412 in which the silicon atom is bonded to four hydrogen atoms, themselves linked to the rest of the polymer. There may be mentioned in particular T resins, especially functionalized silicone T resins such as polyphenylsiloxanes, in particular functionalised with silanol groups (Si-OH), such as those sold under the reference Dow Corning (R) Z-1806. These polymers preferably comprise at least one first block and at least one second block having different glass transition temperatures (Tg), said first and second blocks being interconnected by an intermediate block comprising: at least one constituent monomer of the first block and at least one constituent monomer of the second block.

Advantageously, the first and second sequences of the sequenced polymer are incompatible with each other. Such polymers are described for example in EP 141 1069 or W004 / 028488 or WO 04/028493.

By "sequenced" polymer is meant a polymer comprising at least 2 distinct sequences, for example at least 3 distinct sequences. The first and second polymer blocks are distinguished from each other by their degree of deformability. Thus, the first sequence may be rigid and the second sequence may be flexible.

The glass transition temperatures of the flexible and rigid sequences can be theoretical Tg determined from the theoretical Tg of the constituent monomers of each of the sequences, which can be found in a reference manual such as the Polymer Handbook, 3rd ed, 1989 , John Wiley. according to the following relation, called Fox's Law: 1 / Tg = E (6) i / Tg i), i ria; being the mass fraction of the monomer i in the considered sequence and Tg, being the glass transition temperature of the homopolymer of the monomer i. Unless otherwise indicated, the Tg values for the first and second sequences in the present application are theoretical Tg.

The rigid sequence may have a Tg greater than 20 ° C. The flexible sequence may have a Tg of less than or equal to 20 ° C. According to one embodiment, the copolymer comprises a first rigid sequence and a second flexible sequence. Preferably, the proportion of the rigid block is from 20 to 90% by weight of the copolymer, more preferably from 30 to 90% and most preferably from 50 to 90%. Preferably, the proportion of the flexible block is from 5 to 75% by weight of the copolymer, preferably from 10 to 50% and more preferably from 15 to 45%. Rigid Sequence In the context of the present invention, the rigid sequence (s) is (are) more particularly formed from the following monomers: methacrylates of the formula CH 2 = C (C 1 -C) -COOR 1 in which is an unsubstituted alkyl group. linear or branched, C1 to C4, such as a methyl, ethyl, propyl or isobutyl group or R1 represents a C4 to C4 cycloalkyl group such as an isobornyl group, - the acrylates of formula CH 2 = Cl: -COOR 2 in which R2 represents a tert-butyl group or a C4-C12 cycloalkyl group such as an isobornyl group, the (meth) acrylamides of formula:

Wherein R7 and R8 are the same or different and each represents a hydrogen atom or a linear or branched C1-C12 alkyl group, such as a n-butyl, t-butyl, isopropyl, isohexyl or isooctyl group; , or isononyl; or R7 is i and R8 is 1,1-dimethyl-3-oxobutyl, and R 'is H. or methyl. Examples of such monomers include N-butylacrylamide, N-t-butylacrylamide, N-isopropylacrylamide, N, N-dimethylacrylamide and N, N-dibutylacrylamide, and mixtures thereof. Particularly preferred rigid block monomers are isobornyl methacrylate, isobornyl acrylate, and mixtures thereof. Flexible sequence In the context of the present invention, the flexible sequence or sequences are more particularly formed from the following monomers: acrylates of formula CH 2 = CHCOOR 3, with R 3 representing a linear or branched C1 to C12 unsubstituted alkyl group , such as an isobutyl group (with the exception of a tert-butyl group), in which one or more heteroatoms chosen from O, N, S are optionally inter-linked, the methacrylates of formula CH 2 = C (CH 3) -COOR 4, with R 4 representing a linear or branched C 1 to C 12 unsubstituted alkyl group in which one or more heteroatoms selected from O, N and S are optionally intercalated; vinyl esters of formula R 5 -CO-O-C 1 -CH 2 where R 5 represents a C 4 to C 12 alkyl or branched alkyl group; C4 to C12 alkyl vinyl ethers, and mixtures thereof.

Particularly preferred monomers of the flexible sequence are isobutyl acrylate. Each of the sequences may contain, in a minority proportion, at least one constituent monomer of the other sequence. Thus, the first sequence may contain at least one constituent monomer of the second sequence and vice versa. Each of the first and / or second sequence may comprise, in addition to the monomers indicated above, one or more other monomers called additional monomers, different from the main monomers mentioned above. This additional monomer is, for example, chosen from: a) hydrophilic monomers such as ethylenically unsaturated monomers, other than acrylic acid, comprising at least one carboxylic or sulphonic acid function such as, for example, methacrylic acid, crotonic acid, maleic anhydride, itaconic acid, fumic acid, maleic acid, acrylamidopropanesulfonic acid, vinylbenzoic acid, vinylphosphoric acid and the salts of those -methylenically unsaturated monomers containing at least one tertiary amine function, such as 2-vinylpyridine, 4-vinylpyridine, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminopropyl methacrylamide and sodium salts, these, - methacrylates of the formula CH 2 -C (CH 3) -COOR 6, in which R 6 represents a linear or branched alkyl group containing from 1 to 4 carbon atoms, such as a methyl, ethyl or propyl group; or isobutyl, said alkyl group being substituted by one or more substituents selected from hydroxyl groups (such as 2-hydroxypropyl methacrylate, 2-hydroxyethyl methacrylate) and halogen atoms (Cl, Br, 1, F) , such as trifluoroethyl methacrylate, - methacrylates of formula CH2 = C (CH3) -COOR9, R9 representing a linear or branched C6-C12 alkyl group, in which are optionally interposed (s) a or. a plurality of heteroatoms selected from O, N and S, said alkyl group being substituted with one or more substituents selected from hydroxyl groups and halogen atoms (Cl, Br, I, F); acrylates of formula CH2 = CHC00R1o, R10 representing a linear or branched C12-C12 alkyl group substituted by one or more substituents chosen from hydroxyl groups and halogen atoms (Cl, Br, I and P); such as 2-hydroxypropyl acylate and 2-hydroxyethyl acrylate, or R, O represents (C 1 -C 12) -O-POE (polyoxyethylene) alkyl with repeating oxyethylene unit of from 5 to 30 for example methoxy-POE, or Ria represents a polyoxyethylenated group comprising from 5 to 30 ethylene oxide units b) monomers containing ethylenic unsaturation (s) comprising one or more silicon atonies such as methacryloxypropyl trimethoxy silane, methacryloxypropyl tris (trimethylsiloxy) silane, and mixtures thereof. This or these additional monomers generally represent an amount of less than or equal to 30% by weight, for example from 1 to 30% by weight, preferably from 5 to 20% by weight and, more preferably, from 7 to 30% by weight. 15% by weight of the total weight of the first and / or second sequences. According to one embodiment, the copolymer may comprise at least a first block and at least a second block bonded together by an intermediate segment comprising at least one constituent monomer of the first block and at least one constituent monomer of the second block. . Preferably, the intermediate sequence is derived essentially from constituent monomers of the first sequence and the second sequence. 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 copolymer is a random polymer. Advantageously, the copolymer is derived essentially from monomers chosen from alkyl methacrylates, alkyl acrylates, and mixtures thereof. By "essentially" is meant, in the foregoing and in the following, comprising at least 85%, preferably at least 90%, better at least 95% and even better 100%.

With regard to the acrylate and methacrylate esters. they can derive from the esterification of linear or branched alcohols, cyclic or aromatic C 1 -C 12, in particular C 4 -C. C1o. By way of illustration and not limitation of these alcohols, mention may in particular be made of isoboreneol. According to one embodiment, said copolymer comprises at least acrylate and methacrylate monomers derived from the esterification of the same alcohol and in particular isobeoole. Preferably, the linear transmembrane linear polymer comprises at least isobornyl acrylate monomers, at least isobornyl methacrylate monomers and at least isobutyl acrylate monomers. According to an alternative embodiment, the sequenced polymer may comprise at least: a rigid block, which is a copolymer of isobornyl methacrylate / isobornyl acrylate, and a flexible block, which is an isobutyl acrylate copolymer. More specifically, the copolymer may comprise 50 to 80% by weight of isobornyl niethacrylate acrylate and 10 to 20% by weight of isobutyl acrylate. The weight average mass (Mw) of the copolymer is preferably from 80,000 to 300,000, or even 100,000 to 150,000. The number average mass (Mn) of the copolymer is preferably 20,000 to 90,000, for example from 25,000 to 45,000. E / Copolymers of dienes and styrene, especially copolymers of butadiene and styrene. Mention may in particular be made of styrene / butadiene copolymers sold under the reference PLIOLITE S5E by the company Eliokem. FI polyesters comprising at least one monomer bearing at least one group -SO3M (M representing a hydrogen atom, an ammonium ion NH4 or a metal ion), also called sulfopolyesters. These polyesters advantageously have a glass transition temperature (Tg) greater than 38 ° C. They may have a weight average molecular weight advantageously of less than 200,000, for example ranging from 10,000 to 50,000.

These polyesters can be obtained, in known manner, by polycondensation of at least one dicarboxylic acid with at least one polyol, especially diols. The dicarboxylic acid can be aliphatic, alicyclic or aromatic. Examples of such acids are: oxalic acid, malonic acid, dimethyl methylalic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, 2,2-acid. dimethylglutaric acid, azelaic acid, suberic acid, sebacic acid, fumaric acid, maleic acid, itaconic acid, phthalic acid, dodecanedioic acid, 1,3- cyclohexanedicarboxylic acid, I, 4-cyclohexanedicarboxylic acid, isophthalic acid, terephthalic acid, 2,5-norbornane dicarboxylic acid, diglycolic acid, thiodipropionic acid, 2,5-naphthalenediearboxylic acid, 2,6-naphthalenedicarboxylic acid. These dicarboxylic acid monomers may be used alone or in combination with at least two dicarboxylic acid monomers. Among these monomers, phthalic acid, isophthalic acid and terephthalic acid are preferably chosen.

The diol may be chosen from aliphatic, alicyclic and aromatic diols. A diol chosen from: ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, cyclohexane dimethanol and 4-butanediol is preferably used. As other polyols, it is possible to use glycerol, pentaerythritol, sorbitol, trimethylolpropane.

The polyester amides can be obtained in a similar manner to the polyesters by polycondensation of diacids with diamines or amino alcohols. As the diamine, there can be used ethylenediamine, hexamethylenediamine, meta or para-phenylenediamine. As aminoalcohol, monoethanolamine can be used. The polyester comprises at least one monomer bearing at least one -SO 3 M group, with M representing a hydrogen atom, an ammonium NH 4 'ion or a metal ion, for example an Na', Li +, K +, Mg 2 or Cal + ion. Cul +, Fe '' Fe3LL. In particular, it is possible to use a bifunctional aromatic monomer comprising such a group -SO 3 M. The aromatic nucleus of the bifunctional aromatic monomer further bearing a -S 3M group as described above may be chosen for example from among the nuclei. benzene, naphthalene, anthracene, diphenyl, oxydiphenyl, sulfonyldiphenyl, methylenediphenyl. An example of a bifunctional aromatic monomer also bearing an -SO 3 M group is sulphoisophthalic acid, sulphoterephthalic acid, sulphophthalic acid and 4-staphonaphthalene-2,7-dicarboxylic acid. It is preferred to use copolymers based on isophthalate / sulphoisophthalate, and more particularly copolymers obtained by condensation of diethylene glycol, cyclohexane di-methanol, isophthalic acid, sulfoisophthalic acid. Such polymers are sold, for example, under the trade name Eastman AQ'z by the company Noveon, for example L'Easman AQ 38S. G / a mixture of one or more wax (s) associated with one or more fibers (s), as will be further described later.

In general, the compound or the mixture of compounds giving the composition a spun dmax greater than or equal to 5 mm may be present in the composition in a solids content of at least 5% by weight relative to the total weight. of the composition, for example ranging from 5 to 100% by weight relative to the total weight of the composition, preferably from 10 to 100% by weight and better still from 12 to 100% by weight. According to one embodiment. the compound or the mixture of compounds giving the composition a spun dmax greater than or equal to 5 mm is present in a content greater than or equal to 20% by weight relative to the total weight of the composition, preferably greater than or equal to 25% by weight, better than or equal to 30% by weight and more preferably greater than or equal to 40%, or even greater than or equal to 50% by weight. Compounds and phases which may also be present in the aqueous phase The composition according to the invention may comprise an aqueous medium. The aqueous medium may consist essentially of water; it may also comprise a mixture of water and water-miscible solvent (miscibility in water greater than 50% by weight at 25 ° C) such as lower monoalcohols having from 5 to 5 carbon atoms such as ethanol , isopropanol, glycols having 2 to 8 carbon atoms such as propylene glycol, ethylene glycol, 1,3-butylene glycol, dipropylene glycol, C3-C4 ketones, C2-C4 aldehydes and their mixtures. from to. The aqueous medium (water and optionally the water-miscible solvent) may, for example, be present in a content ranging from 1% to 80% by weight, relative to the total weight of the composition, preferably ranging from 1% to at 70% by weight, and preferably ranging from 1% to 60% by weight.

In a variant, the compositions according to the invention may be anhydrous and, for example, contain less than 1% by weight, relative to the total mass of the composition, of water and / or miscible solvent (s). at the water. Emulsifying system The product according to the invention may or may not contain emulsifying surfactants present in particular in a proportion ranging from 0.1 to 20%, and better still from 0.3% to 15% by weight relative to the total weight of the composition. According to the invention, an emulsifier suitably chosen for obtaining an oil-in-water emulsion is generally used. In particular, it is possible to use an emulsifier having at 25 ° C. a HLB balance (hydrophilic-lipophilic balance) in the Griffin sense, greater than or equal to 8. The HLB value according to GR1F'FIN is defined in J. Soc. CosN. Chem. 1954 (volume 5), pages 249-256. These surfactants may be chosen from nonionic, anionic, cationic, amphoteric surfactants or surfactant emulsifiers. Reference can be made to the document "Encyclopedia of Chemical Technology, KIRKOTHMER", Vol. 22, p. 333-432, edition, 1979, WILEY, for the definition of the properties and functions (emulsifier) of surfactants, in particular pages 347-377 of this reference, for anionic, amphoteric and nonionic surfactants. Preferably used in the composition according to the invention are chosen from: a) nonionic surfactants with a HLB greater than or equal to 8 at 25 ° C., used alone or as a mixture, in particular: oxyethylenated ethers and / or oxypropylenes (which may contain from 1 to 150 oxyethylenated and / or oxypropylenated groups) of glycerol; oxyethylenated and / or oxypropylenated ethers (which may contain from 1 to 150 oxyethylenated and / or oxypropylenated groups) of fatty alcohols (in particular alcohol C8-C24, and preferably C12-C18) such as oxyethylenated ether of oxyethylenated stearyl alcohol (CTFA name "Steareth-20") such as the BRU 78 marketed by the company UNIQUEMA, the oxyethylenated ether of oxyethylenated cetearyl alcohol (CTFA name "Ceteareth-30") and the oxyethylenated ether of the mixture of C 12 -C 15 fatty alcohols having 7 oxyethylenated groups (CTFA name " C12-15 Pareth-7 "marketed under the name NEODOL 25-7® by SI ELL CHEMICALS, fatty acid esters (in particular C8-C24, and preferably C16-C22 acid) and polyethylene glycol ( which may comprise from 1 to 150 ethylene glycol units) such as PEG-50 stearate and PEG-40 monostearate marketed under the name MVRJ 52P® by the company ICI UNIQUEMA, fatty acid esters (especially acid esters). C8-C24, and preferably C16-C22) and oxyethylenated and / or oxypropylenated glycerol ethers (which can contain from 1 to 150 oxyethylenated and / or oxypropylene groups), such as PEG-200 glyceryl monostearate sold under the denomination Simulsol 220 TM® by the company SEPPIC; polyethoxylated glyceryl stearate with 30 ethylene oxide groups, such as the product TAGAT S ° sold by GOLDSCIIMIDT, polyethoxylated glyceryl oleate with 30 ethylene oxide groups, such as the product TAGAT O © sold by the company GOLDSCHMIDT, glyceryl cocoate polyethoxylated with 30 ethylene oxide groups, such as the product VARIONIC LI 1.3® sold by the company SHEREX, glyceryl isostearate polyethoxylated with 30 ethylene oxide groups, such as the product TAGAT L® sold by GOLDSCI-IMIDT and polyethoxylated glyceryl laurate with 30 ethylene oxide groups, such as the product TAGAT 1 from GOLDSCHMIDT, fatty acid esters (in particular C8-C24 acid) and preferably C16-C22) and oxyethylenated and / or oxypropylenated sorbitol ethers (which may contain from 1 to 150 oxyethylenated and / or oxypropylene groups), such as polysorbate 60 sold under the name Tween 60® by the UNIQUEMA company, dimethicone copolyol, such as that sold under the name Q2-52020® by the company Dow Corning, dimethicone copolyol benzoate (FINSOLV SLB 101® and 201® from the company FINTEX), copolymers of propylene oxide and ethylene oxide, also referred to as EO / PO polycondensates, and mixtures thereof. The EO / PO polycondensates are more particularly copolymers consisting of polyethylene glycol and polypropylene glycol blocks, such as, for example, polyethylene glycol / polypropylene glycol / polyethylene glycol triblock polycondensates. These triblock polycondensates have, for example, the following chemical structure: H- (C-CH 2 -Cl 2) a- (C-CH (CH 3) -CII 2) b- (O-Clé 2 -CH 2), -OI, in which formula a ranges from 2 to 120, and b ranges from 1 to 1.00.

The EO / PO polycondensate preferably has a weight average molecular weight ranging from 1000 to 15000, and better still ranging from 2000 to 13000. Advantageously, said OEIOP polycondensate has a cloud temperature, at 10 g / l in distilled water, greater than or equal to 20 ° C, preferably greater than or equal to 60 ° C. The cloud temperature is measured according to standard 1SO 1065. As polycondensate OEIOP usable according to the invention, mention may be made of polyethylene glycol 1 polypropylene glycol 1 polyethylene glycol triblock polycondensates sold under the names SYNPERONIC ® such as SYNPERONIC PE / L44® and SYNPERONIC PE / P127 Er by the company ICI. b) nonionic surfactants with a HLB of less than 8 at 25 ° C., optionally combined with one or more nonionic surfactants with a HLB of greater than 8 at 25 ° C., as mentioned above, such as: esters and ethers dies such as sucrose stearate, sucrose cocoate, sorbitan stearate and mixtures thereof such as Arlatone 2121 'marketed by ICI or SPAN 65V from UNIQUEMA; esters of fatty acids (in particular of C8-C24, and preferably of C16-C22) and of polyol, in particular glycerol or sorbitol, such as glyceryl stearate, glyceryl stearate, such as the product sold under the name TEGIN M by the company GOLDSCHMIDT, glyceryl laurate such as the product sold under the name EVIWITOR 312® by the company HTJLS, polyglyceryl-2 stearate, sorbitan tristearate, glyceryl ricinoleate; oxyethylenated and / or oxypropylenated ethers such as the oxyethylenated ether of stearyl alcohol with 2 oxyethylenated groups (CTFA name "Steareth-2"), such as BRIJ 72 marketed by UNIQUENIA; the cyclomethicone / dimethicone copolyol mixture sold under the name Q2-3225C® by the company Dow Corning; e) anionic surfactants such as: salts of polyoxyethylated fatty acids, in particular those derived from amines or alkaline salts, and mixtures thereof; phosphoric esters and their salts such as "DEA oieth-10 phosphate" (Crodafos N 10N from the company CRODA) or monocotyl monopotassium phosphate (Amphisol K from Givaudan or ARLATONE M.AP 1.60K from the company UNIQUEMA); sulfosucc: cinates such as "Disodium PEG-5 citrate lauryl sulfosuccinate" and "Disodi.um ricinoleamido MEA sulfosuecinate" alkyl ether sulfates such as sodium lauryl ether sulfate; isethionates; acylglutamates such as "Disodium hydrogenated tallow glutamate" (AMISOFT HS-2I R marketed by the company AJINOMOTO) and mixtures thereof. As a representative of cationic surfactants, mention may be made in particular of: alkylimidazolidiniums such as isostearylethylimidonium ethosulphate, ammonium salts such as N, N, N-trimethyl-1-chloride - docosanaminium (Behentriinonium chloride). The compositions according to the invention may also contain one or more amphoteric surfactants such as N-acyl amino acids such as N-alkylaminoacetates and disodium cocoamphodiacetate and amine oxides such as stearamine oxide or silicone surfactants such as dimethicone copolyols phosphates such as that sold under the name PECOSIL PS 100® by the company Phoenix Chemical.

Hydrophilic Gelling Agent The composition according to the invention may optionally comprise a hydrophilic gelling agent, especially when it has an aqueous phase The water-soluble gelling agents that can be used in the compositions according to the invention may be chosen from: homo- or copolymers of acrylic acids. or methacrylic or their salts and their esters and in particular the products sold under the names VERSICOL F® or VERSICOL K® by the company ALLIED COLLOID, UTRAHOLD 8® by CI.EAGEIGY, polyacrylic acids of SYNTHALEN K type, copolymers acrylic acid and acrylamide sold in the form of their sodium salt under the names RETEN by the company HERCULES, sodium polymethacrylate sold under the name DARVAN No. 7® by the company Vanderbilt, the sodium salts of polyhydroxycarboxylic acids sold under the name HYDAGEN F® by HENKEL, polyacrylic acid / acrylate copolymers of PEMIJLEN type alkyl, l'AUIPS (polyacrylamidométhyi propane sulfonic acid partially neutralized ammonia and highly crosslinked) marketed by Clariant, copolymers A1é PS / acrylamicle type SEPIGEL® or SIMCJLC C marketed by the company SEPPIC, and polyoxyethylenated (cross-linked or non-crosslinked) amps / alkyl methacrylate copolymers, proteins such as proteins of plant origin such as wheat, soybean proteins; proteins of animal origin such as keratins, for example keratin hydrolysates and keratin sulfonates; cellulose polymers such as hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, as well as quaternized cellulose derivatives; acrylic polymers or copolymers, such as polyacrylates or polymethacrylates; vinyl polymers, such as polyvinylpyrrolidones, copolymers of methylvinyl ether and malic anhydride, copolymer of vinyl acetate and crotonic acid, copolymers of vinylpyrrolidone and vinyl acetate; copolymers of vinylpyrrolidone and caprolactaine; polyvinyl alcohol; polymers of natural origin, possibly modified, such as: gum arabic, guar gum, xanthan derivatives, karaya gum; alginates and carrageenans; glycoarninog ycanes, hyaluronic acid and its derivatives; shellac resin, sandaraque gum, dammars, elemis, copals; deoxyribonucleic acid; mucopolysaccharides such as chondroitin sulfate, and mixtures thereof.

Some of these water-soluble gelling agents may also act as film-forming polymers. According to a preferred embodiment, the composition comprises at least one PS / acrylamide copolymer.

The water-soluble gelling polymer may be present in the composition according to the invention in a dry matter content ranging from 0.01% to 60% by weight, preferably from 0.5% to 40% by weight, better still from 1% to 30% by weight, or even 5 to 20% by weight relative to the total weight of the composition.

Waxes The composition according to the invention may advantageously comprise, in addition to the compound or the mixture of compounds which gives said composition a spun dmax greater than or equal to 5 mm, one or more wax (es). The wax considered in the context of the present invention is generally a lipophilic compound, solid at room temperature (25 ° C.), deformable or otherwise, with a reversible solid / liquid state change, having a higher melting point. or equal to 30 ° C up to 200 ° C and especially up to 120 ° C. By bringing the wax to the liquid state (melting), it is possible to render it miscible with oils and to form a homogeneous mixture at the same time, but by bringing the temperature of the mixture to room temperature, a recrystallization of the wax is obtained in the oils of the mixture. In particular, the waxes that are suitable for the invention may have a melting point greater than or equal to 45 ° C., and in particular greater than or equal to 55 ° C. For the purposes of the invention, the melting temperature corresponds to the temperature of the most endothermic peak observed in thermal analysis (DSC) as described in ISO 11357-3; 1999. The melting point of the wax can be measured using a differential scanning calorimeter (DSC), for example the calorimeter sold under the name MDSC 2920 ™ by the company TA Instruments. The measurement protocol is as follows: A sample of 5 mg of wax placed in a crucible is subjected to a first temperature rise from -20 ° C to 100 ° C, at the heating rate of 10 ° C / minute, then cooled from 1.00 ° C to -20 ° C at a cooling rate of 10 ° C / minute and finally subjected to a second temperature rise from -20 ° C to 100 ° C at a heating rate of 5 ° C / minute. During the second temperature rise, the variation of the power difference absorbed by the empty crucible and the crucible containing the wax sample as a function of temperature is measured. The melting point of the compound is the value of the temperature corresponding to the peak apex of the curve representing the variation of the difference in power absorbed as a function of the temperature. The waxes that may be used in the compositions according to the invention are chosen from solid waxes at room temperature of animal, vegetable, mineral or synthetic origin, and mixtures thereof. The waxes that can be used in the compositions according to the invention have, for example, a hardness ranging from 0.01 MPa to 15 MPa, for example ranging from 0.5 MPa to 15 MPa. The hardness may especially be greater than 0.05 MPa, in particular greater than 0.1 MPa and in particular 1lPa.

The hardness is determined by measuring the compressive force measured at 20 ° C. using the texturometer sold under the name TA-XT2 by the company RHEO, equipped with a stainless steel cylinder with a diameter of 2 mm. moving at the measuring speed of 0.1 min / sec, and penetrating into the wax at a penetration depth of 0.3 mm. The measurement protocol is as follows: The wax is melted at a temperature equal to the melting point of the wax + 10 ° C. The melted wax is poured into a container 25 mm in diameter and 20 mm deep. The wax is recrystallized at room temperature (25 ° C) for 24 hours so that the surface of the wax is flat and smooth, then the wax is stored for at least 1 hour at 20 ° C before making the measurement hardness.

The mobile of the texturometer is moved at a speed of 0.1 mm, then penetrates into the wax, to a depth of penetration of 0.3 mm. When the mobile has penetrated into the wax to the depth of 0.3 mm, the mobile is held stationary for 1 second (corresponding to the relaxation time) and is removed at a speed of 0.5 mmis. The hardness value is the maximum measured compressive force divided by the surface of the texturometer cylinder in contact with the wax. Illustrative waxes suitable for the invention include hydrocarbon waxes such as beeswax, lanolin wax, and Chinese insect wax, rice bran wax, Carnauba wax , Candellila wax, Ouricury wax, Alfa wax, cork fiber wax, sugar cane wax, berry wax ,. shellac wax, Japan wax and sumac wax, montan wax, orange and lemon waxes, microcrystalline waxes, paraffins and ozokerite, polymethylene, polyethylene, polypropylene waxes and their ethylene / propylene copolymers, the waxes obtained by the Fisher-Tropsch synthesis and the waxy copolymers and their esters, and the waxes resulting from the reaction of fatty acids with carbohydrates, such as sucrose disaccharides, such as sucrose polybhenenate, marketed by Croda under the name Cromaderm B, the waxes obtained by catalytic hydrogenation of animal or vegetable oils having linear or branched CS-C32 fatty chains, such as isomericized jojoba oil, of hydrogenated sunflower, hydrogenated castor oil, hydrogenated coconut oil, hydrogenated lanolin oil, di- (trimethylol-1, I, propane) tetrastearate sold under the name of Hest 2T-4e by the company HETERENE and the tetra-ente- di- (trimethylol-1,1,1 propane) sold under the name} TEST 2T-4B by the company HETERENE.

Mention may also be made of fatty alcohol waxes chosen from saturated or unsaturated, branched or unbranched fatty alcohols containing from 20 to 60 carbon atoms or mixtures comprising at least 30% of said fatty alcohols, for example with polyethylene, such as for example the wax marketed under the reference PERFOlMACOLg 550 L by NEW PHASE TECHNOLOGIES.

Mention may also be made of silicone waxes, such as alkyl or alkoxy dimethicone containing from 16 to 45 carbon atoms, or fluorinated waxes. It is also possible to use the waxes obtained by hydrogenation of castor oil esterified with cetyl alcohol sold under the names Phytowax Ricin 16L64 'and 22L73`a by the company SOPHIM. Such waxes are described in application FR-A-2792190. It is also possible to use the wax obtained by hydrogenation of esterified olive oil with the stearyl alcohol sold under the name "PHYTOWAX Olive 18 L 57". It is also possible to use a so-called sticky wax, that is to say having a tack greater than or equal to 0.1 Ns, for example greater than or equal to 0.7 Ns, and a hardness of less than or equal to 3.5 MPa. . The use of a sticky wax may in particular make it possible to obtain a cosmetic composition which is easily applied to the eyelashes, having good grip on the eyelashes and which leads to the formation of a smooth, homogeneous and thickening makeup .

The tacky wax used may in particular have a tack ranging from 0.7 Ns to 30 Ns, in particular greater than or equal to 1 Ns, in particular ranging from 1 Ns to 20 Ns. in particular greater than or equal to 2 Ns, in particular ranging from 2 Ns to 10 Ns, and in particular ranging from 2 Ns to 5 Ns.

The stickiness of the wax is determined by measuring the evolution of the force (compressive force or stretching force) as a function of time, at 20 ° C. using the texturometer sold under the name "TA.- TX2e "by the company IDHEC, equipped with a mobile cone-shaped acrylic polymer forming an angle of 45 °.

The measurement protocol is as follows: The wax is melted at a temperature equal to the melting point of the wax ° C. The melted wax is poured into a container 25 mm in diameter and 20 mm deep. The wax is recrystallized at room temperature (25 ° C) for 24 hours so that the surface of the wax is flat and smooth, then the wax is kept for at least 1 hour at 20 ° C before making the measurement. sticky. The mobile of the texturometer is moved at a speed of 0.5 mm / s, then penetrates into the wax to a depth of penetration of 2 mm. When the mobile penetrated into the wax to the depth of 2 mm, the mobile is held stationary for 1 second (corresponding to the relaxation time) and is removed at a speed of 0.5 mmis.

During the relaxation time, the force (compressive force) decreases sharply until it becomes zero and then, when the mobile is withdrawn, the force (stretching force) becomes negative and then increases again towards the value O. The pantyhose corresponds to the integral of the force vs. time curve for the part of the curve corresponding to the negative values of the force (stretching force). The value of the sticky is expressed in N.s. The tacky wax that may be used has, for example, a hardness less than or equal to 3.5 MPa, in particular ranging from 0.01 MPa to 3.5 MPa, in particular ranging from 0.05 MPa to 3 MPa, or even from 0.1 MPa to 2.5 MPa. The hardness is measured according to the protocol described above.

As tacky wax, a C20-C40 alkyl (hydroxystearyloxy) stearate (the alkyl group comprising 20 to 40 carbon atoms), alone or in admixture, in particular a 12- (12'-hydroxystearyloxy) stearate, may be used. C20-C40 alkyl of the formula (II): wherein m is an integer from 18 to 38. or a mixture of compounds of formula (II). Such a wax is sold, for example, under the names "Kester Wax K 82" and "Lester Wax K 80 Pe" by the company Koster Keunen.

The waxes mentioned above generally have an initial melting point below 45 ° C. It is also possible to use the microcrystalline wax marketed under the reference SPI 8 by the company STR_AkHL and PITSCH. which has a hardness of about 0.46 MPa and a stickiness value of about 1 N.s.

The wax (es) may be present in the form of an aqueous microdispersion of wax. By aqueous microdispersion of wax is meant an aqueous dispersion of wax particles in which the size of said wax particles is less than or equal to about 1 μm. Microdispersions of wax are stable dispersions of colloidal wax particles, and are especially described in "Mieroemulsions Theory and Practice", L. M. Prince Ed., Aeadic Press (1977) pages 21-32. In particular, these microdispersions of wax can be obtained by melting the wax in the presence of a surfactant, and optionally a portion of the water, and then gradually adding hot water with stirring. The intermediate formation of a water-in-oil emulsion is observed, followed by a phase inversion with final obtaining of an oil-in-water type microemulsion. On cooling, a stable microdispersion of solid colloidal particles of wax is obtained. The microdispersions of wax can also be obtained by stirring the mixture of wax, surfactant and water using stirring means such as ultrasound, the high-pressure homogenizer, the turbines. The particles of the microdispersion of wax preferably have average dimensions of less than 1 μm (in particular ranging from 0.02 μm in to 0.99 μm), preferably less than 0.5 μm (especially ranging from 0.06 μm to 0 μm). , 5 μm). These particles consist essentially of a wax or a mixture of waxes. However, they may comprise, in a minor proportion, oily and / or pasty fatty additives, a surfactant and / or a usual fat-soluble additive / active agent. It is also possible to use waxes provided in the form of small particles having a dimension expressed in diameter <"effective" mean volume D [4.3] of the order of 0.5 to 30 micrometers, in particular from 1 to 20 micrometers , and more particularly from 5 to 10 micrometers, hereinafter referred to as "micro-waxes". The particle sizes can be measured by various techniques, in particular the light scattering techniques (dynamic and static), the Coulter counter methods, the sedimentation rate measurements (connected to the size via the law of Stokes) and microscopy. These techniques make it possible to measure a particle diameter and for some of them a particle size distribution. As micro-waxes that can be used in the compositions according to the invention, mention may be made in particular of carnauba micro-waxes such as that marketed under the name MicroCare 350® by the company MICRO POWDERS, synthetic wax micro-waxes such as marketed under the name MicroEase 114S4 by the company MICRO POWDERS, micro waxes consisting of a mixture of carnauba wax and polyethylene wax such as those sold under the names Micro Care 300 '' and 3104 by the company MICRO POWDERS , micro waxes consisting of a mixture of carnauba wax and synthetic wax such as that marketed under the name Micro Care 3254 by the company Micro POWDERS, polyethylene micro-waxes such as those sold under the names Micropoly 200e, 2204 , 220Le and 250S® by the company MICRO POWDERS and polytetrafluoroethylene micro-waxes such as those sold under the names Microslip 519 and 519 by the company MICRO POWDERS, According to an advantageous embodiment, the composition according to the invention comprises at least one wax chosen from microcrystalline waxes, paraffin waxes, waxes of polyethylene, in particular the wax sold under the reference WAX AC 617 by the company I-oneywell, ozokerite, carnauba wax, candelilla wax, rice bran wax, beeswax, waxes fatty alcohol comprising from 20 to 60 carbon atoms and mixtures thereof. According to one embodiment of the invention, the composition comprises at least one liquid fatty phase comprising at least one volatile hydrocarbon oil chosen from isoparaffins having from 7 to 16 carbon atoms, and in particular isododecane, at least one wax chosen among the polyethylene waxes, and at least one wax chosen from fatty alcohol waxes.

According to another embodiment of the invention, the composition comprises at least one liquid fatty phase comprising at least one volatile silicone oil chosen from volatile cyclic silicone oils, in particular those having a viscosity <8 centistokes (8101) m2 / s), and in particular cyclopentadimethylsiloxane, at least one wax chosen from polyethylene wax, and at least one wax chosen from beeswax. The wax or waxes may represent from 1 to 50% by weight relative to the total weight of the composition, preferably from 5 to 40% and even more preferably from 7.5 to 35% by weight. Serocrystalline Pères The composition according to the invention may optionally comprise one or more semi-crystalline polymers. The term "polymer" means compounds comprising at least two units, preferably at least 3 units and especially at least 1.0 repeating units. By "seri-crystalline polymer" is meant polymers having a crystallizable portion, a crystallizable pendant chain or a crystallizable block in the backbone, and an amorphous portion in the backbone and having a first-order reversible phase change temperature, in which particular fusion (solid-liquid transition). When the crystallizable portion is in the form of a crystallizable block of the polymer backbone, the amorphous portion of the polymer is in the form of an amorphous sequence; the semicrystalline polymer is in this case a block copolymer, for example of the diblock, triblock or multiblock type, comprising at least one crystallizable block and at least one amorphous block. By "sequence" is generally meant at least 5 identical repetition patterns. The crystallizable sequence (s) are then of a different chemical nature from the amorphous sequence (s).

The semi-crystalline polymer has a melting temperature greater than or equal to 30 ° C (especially from 30 ° C to 80 ° C), preferably from 30 ° C to 60 ° C. This melting temperature is a first order change of state temperature. This melting temperature can be measured by any known method and in particular using a differential scanning calorimeter (D.S.C.).

Advantageously, the semi-crystalline polymer (s) to which the invention applies have a number average molecular mass greater than or equal to 1,000. Advantageously, the semi-crystalline polymer (s) of the composition of the invention have a number average molecular weight Mn ranging from 2,000 to 800,000, preferably from 3,000 to 500,000, more preferably from 4,000 to 150,000, especially less than 100,000, and better still from 4,000 to 99,000. they have a number-average molecular mass greater than 5,600, for example from 5,700 to 99,000. For the purposes of the invention, the term "chain or crystallizable block" means a chain or sequence which, if it were alone, would pass from the amorphous state to the crystalline state, reversibly, depending on whether it is above or below the melting temperature. A chain within the meaning of the invention is a group of atoms, during or lateral to the backbone of the polymer. A sequence is a group of atoms belonging to the backbone, a group constituting one of the repeating units of the polymer. Advantageously, the "crystallizable pendant chain" can be a chain comprising at least 6 carbon atoms. The semi-crystalline polymer may be chosen from block copolymers comprising at least one crystallizable block and at least one amorphous block, homopolymers and copolymers bearing at least one crystallizable side chain per repeating unit, and mixtures thereof.

Such polymers are described, for example, in the document EP 1396259. According to a more particular embodiment of the invention, the polymer is derived from a crystallizable chain monomer chosen from saturated C14 to C14 alkyl (meth) aerylates. C22. By way of a particular example of a structuring semi-crystalline polymer that can be used in the composition according to the invention, mention may be made of the Intelimer products from the company Landec described in the brochure "Intelimer 1z polymers", Landes P22 (Rev. 4-97 ). These polymers are in solid form at ambient temperature (25 ° C.). They carry crystallizable side chains and have the formula X above. The serocrystalline polymer (s) may represent from 1 to 50% by weight relative to the total weight of the composition, preferably from 5 to 40% and even more preferably from 7 to 50% by weight. 5 to 35% by weight. Lipophilic Gelling Agents The composition may optionally comprise a gelling agent chosen from organic or inorganic, polymeric or molecular lipophilic gelling agents.

As inorganic lipophilic gelling agent, there may be mentioned optionally modified clays, such as hectorites modified with a C 10 -C 22 fatty acid ammonium chloride, such as hectorite modified with di-stearyl dimethyl ammonium chloride such that for example, that marketed under the name Bentone 38V® by the company ELEMENTIS. It is also possible to mention the optionally hydrophobic fumed silica at the surface, the particle size of which is less than 1 μm. It is indeed possible to chemically modify the surface of the silica, by chemical reaction generating a decrease in the number of silanol groups present on the surface of the silica. In particular, it is possible to substitute silanol groups with hydrophobic groups: a hydrophobic silica is then obtained. The hydrophobic groups may be: trimethylsiloxyl groups, which are especially obtained by treatment of fumed silica in the presence of hexamethyldisilazane. Silicas thus treated are referred to as "Siliea silylate" according to the CTFA (6th edition, 1995) and are, for example, sold under the references Aerosil R812® by the company DEGUSSA, CAP-®-S IL TS-530® by the CABOT company, dimethylsilyloxyl or polydimethylsiloxane groups, which are especially obtained by treatment of fumed silica in the presence of polydimethylsiloxane or dimethyldichlorosilane, silicas thus treated are known as "silica dimethyl silylate" according to the CTFA (6th edition, 1995). They are for example marketed under the references Aerosil R972®, and Aerosil R974® by the company DEGUSSA, CAB-O-SIL TS-610® and CAB-O-SIL TS-720® by CABOT. The hydrophobic fumed silica has in particular a particle size which may be nanometric to micrometric, for example; ranging from about 5 to 200 nm. It is also possible to use nonpolymeric molecular organic gelling agents, also called organogelators, associated with a liquid fatty phase (which may be the liquid fatty phase of the composition according to the invention), which are compounds whose molecules are capable of establishing between them physical interactions leading to a self-aggregation of the molecules with formation of a supra-molecular 3D network which is responsible for the gelation of the liquid fatty phase. The supramolecular network can result from the formation of a network of fibrils (due to the stacks or aggregations of organogelling molecules), immobilizing the molecules of the liquid fatty phase. The ability to form this network of fibrils, and thus to gel, depends on the nature (or chemical class) of the organogelling agent, the nature of the substituents carried by its molecules for a given chemical class and the nature of the liquid fatty phase.

Physical interactions are diverse but exclude co-crystallization. These physical interactions are in particular interactions of the type self-complementary hydrogen interactions, n interactions between unsaturated rings, dipolar interactions, coordination bonds with organometallic derivatives and their associations. In general, each molecule of an organogelator can establish several types of physical interactions with a neighboring molecule. Also, advantageously, the molecules of the organogelators according to the invention comprise at least one group capable of establishing hydrogen bonds and better at least one two groups capable of establishing hydrogen bonds, at least one aromatic ring and better at least two aromatic rings, at least one or more bonds with ethylenic unsaturation and / or at least one or more asymmetric carbons. Preferably, the groups capable of making hydrogen bonds are chosen from hydroxyl, carbonyl, amine, carboxylic acid, amide, urea and benzyl groups and their combinations. The organogelling agent (s) are soluble in the liquid fatty phase after heating until a transparent homogeneous liquid phase is obtained. They can be solid or liquid at room temperature and atmospheric pressure. The molecular organogelling agent (s) that may be used in the composition according to the invention are in particular those described in the document "Specialist Surfactants", edited by D. Robb of 1997, p.209-263, chapter 8 of P. Terech, European applications EP -A-l068854 and EP-A-1086945 or in the application WO-A-02/47031. Among these organogelators, there may be mentioned amides of carboxylic acids, in particular tri-carboxylic acids such as cyclohexanetricarboxamides (see European Patent Application EP-A-1068854), the diamines having hydrocarbon chains each containing from 1 to 22 carbon atoms, for example from 6 to 18 carbon atoms, said chains being unsubstituted or substituted with at least one substituent chosen from ester, urea and fluoro groups (see application EP-A-1086945) and in particular the resulting diamides of the reaction of diaminocyclohexane, in particular diazninocyclohexane in trans form, and of an acid chloride such as, for example, N, N'-bis (dodecanoyl) -1,2-diaminocyclohexane, N-acylamino acid amides, for example the diamides resulting from the action of an N-acylamino acid with amines containing from 1 to 22 carbon atoms. as for example those described in document WC-93/23008 and in particular the amides of N-acylglutamic acid, where the acyl group represents a C8-C22 alkyl chain, such as N-Lauroyl-L-acid dibutylamide. glutamic acid, manufactured or marketed by Ajinomoto under the name GP-1 and their mixtures. Polymeric organic lipophilic gelling agents are, for example: partially or fully crosslinked elastomeric organopolysiloxanes of three-dimensional structure, such as those marketed under the names SG6 5IG16 '' 'and KSG18® by the company SFI -TECS of Trefil E-505C ° and Trefil E-506C 'by DOW-CORNING, Gransil SR-CYC °, SR DMF10 °, SR-DC556®, SR 5CYC gel®, SR DMF 10 gels and SR DC 556 gel® by GRANT INDUSTRIES , of SF 1204® and JK 113® by the company GENERAL ELECTRIC ethylcellulose such as that sold under the name Ethocel by the company DOW CI-IEMICAL; polyamondensates of polyamide type resulting from the condensation between (a) at least one acid chosen from dicarboxylic acids comprising at least 32 carbon atoms such as dimer fatty acids and (3) an alkylene diamine and in particular ethylene diamine wherein the polyamide polymer comprises at least one terminal carboxylic acid group esterified or amidated with at least one monohydric alcohol or a monoamine comprising from 12 to 30 linear and saturated carbon atoms, and in particular, the ethylene diarineldilinoleate copolymers of stearyl such as that sold under the name Uniclear 100 \ TG® by the company ARIZONA CFIEMICAL; polyorganosiloxane-type silicic acid polyamides such as those described in US-A-5,874,069, US-A-5,919,441, US-A-6,051,216 and US-A-5,981,680, for instance those sold under the reference Dow Corning 2- 8179 Gellant by the company Dow Corning; galactomannans comprising from one to six, and in particular from two to four, hydroxyl groups per sac, substituted by a saturated or unsaturated alkyl chain, such as guar gum alkylated with C1-C6 alkyl chains, and in particular with CI to C3 and mixtures thereof; the block copolymers, optionally hydrogenated, of the "diblock", "triblock" or "radial" type, in particular with styrene blocks and with C 3 -C 5 ethylenealkylene blocks. As diblock copolymer, preferably hydrogenated, mention may be made of copolymers styrene-ethylene / propylene copolymers of styrene ethylene / butadiene. Dibloes polymers are sold in particular. Kraton® name G1701E by Kraton Polymers.

As the triblock copolymer, preferably hydrogenated, mention may be made of styrene-ethylene / propylene-styrene copolymers, styrene-ethylene / butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, and styrene-butadiene-styrene copolymers. Triblock polymers are sold in particular under the names Kraton G 1650, Kraton G1652, Kraton D1101, Kraton D1102 and Kratonu D1160 by Kraton Polymers.

It is also possible to use a mixture of styrene-butylene / ethylene-styrene triblock hydrogenated copolymer and hydrogenated star polymer ethylene-propylene-enene, such a mixture being in particular in isododecane. Such mixtures are for example sold by PENRECO under the trade names VERSAGELg M5960 and VERSAGELe M5670. Mention may also be made of polystyrene / polyisoprene and polystyrene / polybutadiene copolymers such as those sold under the name Luvitol fl.SBu by the company BASF.

Among the lipophilic gelling agents that can be used in the compositions according to the invention, mention may also be made of dextrin and fatty acid esters, such as dextrin palmitates, in particular such as those sold under the names R.heopearl TL® or Rheopearl KL® by CIRA FLOUR. The lipophilic gelling agent (s) may be from 1 to 50% by weight relative to the total weight of the composition, preferably from 5 to 40% and even more preferably from 7 to 5 to 35% by weight. Paste compound

The composition according to the invention may optionally comprise at least one pasty compound.

For the purposes of the present invention, the term "pasty" is understood to mean a lipophilic fat compound with a reversible solid / liquid state change and having at the temperature of. 23 ° C a liquid fraction and a solid fraction.

The pasty compound preferably has a hardness at 20 ° C ranging from 0.001 to 0.5 MPa, preferably from 0.002 to 0.4 MPa.

The hardness is measured by a method of penetrating a probe into a sample of compound and in particular using a texture analyzer (eg TA-XT2i from Stable Micro Systems Ltd) equipped with a cylinder stainless steel 2 mm in diameter. The hardness measurement is carried out at 20 ° C in the center of 5 samples. The cylinder is introduced into each sample at a pre-speed of 1 mm / s and then at a measuring speed of 0.1 mm / s, the. depth of penetration being 0.3 mm. The measured value of the hardness is that of the maximum peak. This pasty compound is furthermore, at a temperature of 23 ° C., in the form of a liquid fraction and a solid fraction. In other words, the starting melting temperature of the pasty compound is below 23 ° C. The liquid fraction of the pasty compound, measured at 23 ° C., may, for example, represent from 23% to 97% by weight of the compound. This liquid fraction, at 23 ° C., can preferably represent between 40 and 85% by weight of the compound. The liquid fraction by weight of the pasty compound at 23 ° C. is equal to the ratio of the enthalpy of fusion consumed at 23 ° C. the enthalpy of fusion of the pasty compound. The heat of fusion of the pasty compound is the enthalpy consumed by the compound to pass from the solid state to the liquid state. The pasty compound is said to be in the solid state when the entirety of its mass is in solid form. The pasty compound is said to be in the liquid state when all of its mass is in liquid form.

The enthalpy of fusion of the pasty compound is equal to the area under the curve of the thermogram obtained using a differential scanning calorimeter (DS C), such as the calorimeter sold under the name MDSC 2920 by the company TA instrument, with a rise in temperature of 5 or 10 ° C per minute, according to the standard 1.SO 11357-3: 1999. The enthalpy of fusion of the pasty compound is the amount of energy required to pass the compound from the solid state to the liquid state. It is expressed in J / g. The heat of fusion consumed at 23 ° C is the amount of energy absorbed by the sample to change from the solid state to the state that it has at 23 ° C consisting of a liquid fraction and a solid fraction. The liquid fraction of the pasty compound measured at 32 ° C. is preferably 40 to 100% by weight of the compound, preferably 50 to 100%, preferably 80 to 100%, more preferably 90 to 100% by weight of the compound. When the liquid fraction of the pasty compound measured at 32 ° C. is equal to 100%, the temperature of the end of the melting range of the pasty compound is less than or equal to 32 ° C.

The liquid fraction of the pasty compound measured at 32 ° C. is equal to the ratio of the enthalpy of fusion consumed at 32 ° C. to the heat of fusion of the pasty compound. The enthalpy of fusion consumed at 32 ° C. is calculated in the same way as the heat of fusion consumed at 23 ° C.

The pasty compound is preferably chosen from synthetic compounds and compounds of plant origin. A pasty compound can be obtained synthetically from starting materials of plant origin. The pasty compound is advantageously chosen from: lanolin and its derivatives, such as lanolin alcohol, oxyethylenated lanolines, acetylated lanolin, lanolin esters such as isopropyl lanolate, oxypropylenated lanolines, the compounds polymeric or non-polymeric silicone polymers, such as polydimethylsiloxanes of high molecular weight, polydimethylsiloxanes with side chains of the alkyl or alkoxy type having 8 to 24 carbon atoms, especially stearyl dimethicones, polymeric fluorinated compounds or non-vinyl polymers, in particular: homopolymers of olefins and copolymers of olefins; homopolymers and copolymers of hydrogenated dienes; linear or branched oligomers, homopolymers or copolymers of alkyl (meth) acrylates, preferably having a C8-C30 alkyl group; Homo and copolymer oligomers of vinyl esters having C 8 -C 30 alkyl groups and copolymers of vinyl ethers having C 8 -C 30 alkyl groups, the liposoluble polyethers resulting from the polyetherification between one or more C2-C100 diols, preferably C2-C50 diols, the polyol ethers chosen from pentaerythritol ethers and of polyalkylene glycol, fatty alcohol and sugar ethers, and mixtures thereof, pentaerythritol ether and polyethylene glycol having 5 oxyethylene units (50E) (CTEA name: PEG-5 Pentaerythrityl Ether), pentaerythritol ether and polypropylene glycol comprising. 5 oxypropylene (5 PO) units (CTFA name: PPG-5 Pentaerythrityl Ether), and mixtures thereof, and more particularly the PEG-5 Pentaerythrityl Ether mixture, PPG-5 Pentaerythrityl Ether and soybean oil, sold under the name "Lanolide" by the company Vevy, mixture where the constituents are in a ratio by weight 46/46/8 46% of PEG-5 Pentaerythrityl Ether, 46% of PPG-5 Pentaerythrityl Ether and 8% of soybean oil, - esters and polyesters, and mixtures thereof. The pasty compound is preferably a polymer, in particular a hydrocarbon polymer.

A preferred silicone and fluoro pasty compound is polymethyl trifluoropropyl methylalkyl dimethylsiloxane, manufactured under the name X22-1.088 by SHIN ETSU. When the pasty compound is a silicone and / or fluorinated polymer, the composition advantageously comprises a compatibilizing agent such as short chain esters such as isodecyl neopentanoate.

Among the liposoluble polyesters, copolymers of ethylene oxide and / or propylene oxide with long-chain alkylenes oxides in C 1 -C 30 are preferred, more preferably such as the weight ratio of ethylene oxide. oxide and / or propylene oxide with alkylene oxide in the copolymer is from 5:95 to 70:30. In this family, mention will in particular be made of copolymers such as long-chain alkylene oxides are arranged in blocks having an average molecular weight of 1,000 to 10,000, for example a polyoxyethylene / polydodecyl glycol block copolymer such as dodecanediol ethers (22). mol) and polyethylene glycol (45 EO) marketed under the tradename ELFACOS ST9 by Akzo Nobel. Among the esters, the esters of an oligomeric glycerol, in particular the esters of diglycerol, in particular the condensates of adipic acid and of glycerol, for which part of the hydroxyl groups of the glycerols have reacted with a mixture of fatty acids such as stearic acid, capric acid, stearic acid and isostearic acid and 12-hydroxystearic acid, such as those marketed under the trademark Softisan 649 by the company Sasol - the phytosterol esters, - pentaerythritol esters - esters formed from at least one alcohol, at least one of the alcohols being a Guerbet alcohol and a diacid dimer formed from at least one fatty acid unsaturated, such as tall oil fatty acid dimer ester comprising 36 carbon atoms and a mixture of i) Guerbet alcohols comprising 32 carbon atoms and ii) behenyl alcohol; the dimer ester of linoleic acid and a mixture of two Guerbet alcohols, 2-tetradecyl-octadecanol (32 carbon atoms) and 2-hexadecylicosanol (36 carbon atoms). The non-crosslinked polyesters resulting from the polycondensation between a linear or branched C 4 -C 50 dicarboxylic acid or polycarboxylic acid and a C 2 -C 50 diol or polyol, the polyesters which result from the esterification, by a polycarboxylic acid d an aliphatic hydroxycarboxylic acid ester such as Risocast DA-L and Risocast DA-H marketed by the Japanese company KOKYU ALCOHOL KOGYO, which are esters resulting from the esterification reaction of hydrogenated castor oil with dilinoleic acid or isostearic acid - aliphatic ester esters resulting from the esterification of an aliphatic hydroxycarboxylic acid ester with an aliphatic carboxylic acid; (Salacos HCIS (V) -L sold by the company Nishing Oit) The aliphatic carboxylic acid comprises from 4 to 30 and preferably from 8 to 30 carbon atoms. It is preferably selected from hexanoic acid, heptanoic acid, occanoic acid, 2-ethyl hexanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, acid tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, hexyldecanoic acid, heptadecanoic acid, octadecanoic acid, isostearic acid, nonadecanoic acid, eicosanoic acid, isoarachidic acid, octyldodecanoic acid, henicosanoic acid, docosanoic acid, and mixtures thereof. The aliphatic carboxylic acid is preferably branched. The aliphatic hydroxycarboxylic acid ester is advantageously derived from a hydroxylated aliphatic carboxylic acid having from 2 to 40 carbon atoms, preferably from 10 to 34 carbon atoms and more preferably from 12 to 28 carbon atoms, and from 1 to 20 hydroxyl groups, preferably 1 to 10 hydroxyl groups and more preferably 1 to 6 hydroxyl groups. The aliphatic hydroxy carboxylic acid ester is selected from a) partial or total esters of linear, saturated, monohydroxylated aliphatic monocarboxylic acids; b) partial or total esters of unsaturated monohydroxylated aliphatic monocarboxylic acids; e) partial or total esters of saturated monohydroxylated aliphatic polycarboxylic acids; d) partial or total esters of saturated polyhydroxylated aliphatic polycarboxylic acids; e) partial or total esters of aliphatic polyols C2 to Cl () reacted with a mono- or polyhydroxylated aliphatic mono or poly carboxylic acid, and mixtures thereof. The aliphatic ester esters are advantageously chosen from: the ester resulting from the esterification reaction of hydrogenated castor oil with isostearic acid in proportions of 1 to 1 (III) or castor oil monoisostearate hydrogenated, - the ester resulting from the esterification reaction of hydrogenated castor oil with isostearic acid in proportions 1 to 2 (1/2) or hydrogenated castor oil diisostearate, - ester resulting from the esterification reaction of hydrogenated castor oil with isostearic acid in proportions 1 to 3 (1/3) or hydrogenated castor oil triisostearate, and mixtures thereof. The pasty compound may also be of plant origin. In this case, mention may especially be made of isomericized jojoba oil such as isomerically trans-hydrogenated partially hydrogenated jojoba oil manufactured or marketed by Desert Whale under the trade name Iso-Jojoba-50 th, orange wax as for example, that marketed under the reference Orange Peel Wax by the company Koster Keunen, shea butter, partially hydrogenated olive oil, for example the compound sold under the reference Beurrolive by Soliance. , cocoa butter, mango oil such as, for example, the Lipex 302 from Aarhuskarlshamn.

The pasty compound is preferably 0.5 to 85%, more preferably 1 to 60%, more preferably 2 to 30% and most preferably 3 to 15% by weight of the composition. Oils The composition according to the invention may optionally comprise at least one oil. By "oil" is meant a liquid fatty substance at room temperature and atmospheric pressure. Volatile oil The composition according to the invention may optionally comprise at least one volatile oil. By "volatile oil" is meant an oil (or non-aqueous medium) capable of evaporating on contact with the skin in less than one hour, at room temperature and atmospheric pressure. The volatile oil is a volatile cosmetic oil which is liquid at ambient temperature, in particular having a non-zero vapor pressure, at ambient temperature and atmospheric pressure, in particular having a vapor pressure ranging from 0.13 Pa to 40 15 000 Pa ( 10-3 at 300 mm Hg), and preferably ranging from 1.3 Pa to 13 000 Pa (0.01 to 100 mm log), and preferably ranging from 1.3 Pa to 1300 Pa (0.01 at 10 mm Hg). This volatile oil can be hydrocarbon-based. The volatile hydrocarbon oil may be chosen from hydrocarbon-based oils having from 7 to 16 carbon atoms. The volatile hydrocarbon oil may be present in the composition according to the invention in a content ranging from 0.1% to 90% by weight, relative to the total weight of the composition, preferably ranging from 1% to 70% by weight. weight, and preferably ranging from 5% to 70% by weight, or even 5% to 50% by weight. The composition according to the invention may contain one or more volatile branched aleane (s). By "one or more branched branched alkane (s)" is meant indifferently "one or more volatile branched aleane (s) oil (s)". As hydrocarbon-based volatile oil having from 7 to 16 carbon atoms, mention may be made in particular of branched C 8 -C 16 alkanes such as iso-alkanes (also known as isoparaffins) at C 8 -C 16, isododecane, isodecane and isohexadecane and for example the oils sold under the trade names Isopars or permetyls, branched C8-C16 esters such as isohexyl neopentanoate, and mixtures thereof. Preferably, the hydrocarbonaceous volatile oil having from 8 to 16 carbon atoms is chosen from isododecane, isodecane and isohexadecane, and mixtures thereof, and is especially isododecane.

The composition according to the invention may contain one or more volatile linear aleane (s). By "one or more volatile linear alkane (s)" is meant indifferently "one or more volatile linear alkane (s) oil (s)". A volatile linear alkane suitable for the invention is liquid at ambient temperature (about 25 ° C.) and at atmospheric pressure (760 mm -1g). By "volatile linear alkane" suitable for the invention is meant a linear cosmetic alkane, capable of evaporating on contact with the skin in less than one hour, at ambient temperature (25 ° C.) and at atmospheric pressure (760 mm). Hg, ie 101,325 Pa), liquid at room temperature, especially having an evaporation rate ranging from 0.01 to 15 mg / cm 2 / min, at room temperature (25 ° C.) and atmospheric pressure (760 mmHg). Preferably, the "volatile linear alkanes" that are suitable for the invention have an evaporation rate ranging from 0.01 to 3.5 mg / cm 2 / min, at ambient temperature (25 ° C.) and atmospheric pressure (760 mm). Hg).

Preferably, the "volatile linear alkanes" that are suitable for the invention have an evaporation rate ranging from 0.01 to 1.5 mg / cm 2 / min, at ambient temperature (25 ° C.) and atmospheric pressure (760 mm). Hg). More preferably, the "volatile linear alkanes" suitable for the invention have an evaporation rate ranging from 0.01 to 0.8 mg / cm 2 / min, at room temperature (25 ° C.) and at atmospheric pressure (760 mm). Hg). Even more preferably, the "volatile linear alkanes" that are suitable for the invention have an evaporation rate ranging from 0.01 to 0.3 rg / m.sup.2 / min at ambient temperature (25.degree. C.) and atmospheric pressure (760.degree. mm Hg). More preferably, the "volatile linear alkanes" suitable for the invention have an evaporation rate ranging from 0.01 to 0.12 mg / cm 2 / min, at room temperature (25 ° C.) and atmospheric pressure ( 760 mmHg). The rate of evaporation of a volatile alkane according to the invention (and more generally of a volatile solvent) can be evaluated in particular by means of the protocol described in WO 06/013413, and more particularly by means of the protocol described below. after. A crystallizer (diameter: 7 cm) placed on a balance in a chamber of about 0.3 nn3 regulated in temperature (25 ° C.) and in hygrometry (relative humidity 50%) is introduced into a crystallizer (diameter: 7 cm). 15 g of hydrocarbon solvent. volatile.

The liquid is allowed to evaporate freely, without stirring, providing ventilation by a fan (PAPSTWMOTOREN, reference 8550 N, rotating at 2700 revolutions / minute) arranged in a vertical position above the crystallizer containing the volatile hydrocarbon solvent, the blades being directed towards the crystallizer, at a distance of 20 cm from the bottom of the crystallizer. The mass of volatile hydrocarbon solvent remaining in the crystallizer is measured at regular time intervals. The evaporation profile of the solvent is then obtained by plotting the curve of the amount of product evaporated (in mg / cm 3) as a function of time (in min).

Then we calculate the evaporation rate that corresponds to the tangent at the origin of the curve obtained. The evaporation rates are expressed in mg of volatile solvent evaporated per unit area (cm 2) and per unit of time (minute). According to a preferred embodiment, the "volatile linear alkanes" that are suitable for the invention have a non-zero vapor pressure (also called saturated vapor pressure) at room temperature, in particular a vapor pressure of 0.3 Pa. at 6,000 Pa. Preferably, the "volatile linear alkanes" that are suitable for the invention have a vapor pressure ranging from 0.3 to 2000 Pa at ambient temperature (25 ° C.). Preferably, the "volatile linear alkanes" that are suitable for the invention have a vapor pressure ranging from 0.3 to 1000 Pa at room temperature (25 ° C.). More preferably, "volatile linear alkanes" that are suitable for the invention have a vapor pressure ranging from 0.4 to 600 Pa, at room temperature (25 ° C). In a preferred manner, the "volatile linear alkanes" that are suitable for the invention have a vapor pressure ranging from 1 to 200 Pa at room temperature (25 ° C.).

More preferably, the "volatile linear alkanes" suitable for the invention have a vapor pressure ranging from 3 to 60 Pa, at room temperature (25 ° C). According to one embodiment, a volatile linear alkane suitable for the invention may have a flash point in the range of 30 to 120 ° C, and especially 40 to 100 ° C. The flash point is in particular measured according to ISO 3679. According to one embodiment, an alkane that is suitable for the invention may be a volatile linear alkane comprising from 7 to 14 carbon atoms.

In a preferred manner, the "volatile linear alkanes" that are suitable for the invention comprise from 8 to 14 carbon atoms. In a preferred manner, the "volatile linear alkanes" that are suitable for the invention comprise from 9 to 14 carbon atoms.

In a preferred manner, the "volatile linear alkanes" that are suitable for the invention comprise from 10 to 14 carbon atoms. In a preferred manner, the "volatile linear alkanes" that are suitable for the invention comprise from 1 to 14 carbon atoms. According to an advantageous embodiment, the "volatile linear alkanes" that are suitable for the invention have an evaporation rate, as defined above, ranging from 0.01 to 3.5 mg / cm 2 / min, at room temperature. (25 ° C) and atmospheric pressure (760 mm Hg), and comprise from 8 to 14 carbon atoms. A volatile linear alkane suitable for the invention may advantageously be of plant origin.

Preferably, the volatile linear alkane or the mixture of volatile linear alkanes present in the composition according to the invention comprises at least one isotope 14C of the carbon (carbon 14), in particular the isotope 14C may be present in a ratio 14C / 12C greater than or equal to 1.10- 1 ", preferably greater than or equal to 1.10" 1 ', more preferably greater than or equal to 7.5.] 0-14 and better still or equal to 1.5.10-13. Preferably, the ratio of 14C / 12C is from 6.10-13 to 1.2.10-12. The amount of 14C isotopes in the volatile linear alkane or the mixture of volatile linear alkanes can be determined by methods known to man. such as the Libby counting method, liquid scintillation spectrometry or accelerating mass spectrometry (Aecelerator Mass Spectrometry).

Such an alkane can be obtained, directly or in several stages, from a vegetable raw material such as an oil, a butter, a wax, etc. By way of example of alkanes which are suitable for the invention, mention may be made of the alkanes described in the patent applications of Cognis WO 2007/068371, or WO2008 / 155059 (distinct alkane mixtures and differing from at least a carbon). These alkanes are obtained from fatty alcohols, themselves obtained from coconut oil or palm oil. By way of example of linear alkanes which are suitable for the invention, mention may be made of n-heptane (C7), n-octane (C8), n-nonane (C9) and n-decape (C10). n-undecane (CI1), n-dodecane (C1.2), n-tridecane (C13), n-tetradecane (C14), and mixtures thereof. According to a particular embodiment, the volatile linear alkane is selected from n-nonane, n-undecane, n-dodecane, natridecane, n-tetradecane, and mixtures thereof.

According to a preferred embodiment, mention may be made of the mixtures of n-undecane (Cl i) and n-tridecane (C 13) obtained in Examples 1 and 2 of Application WO2008 / 155059 from Cognis. We. mention may also be made of n-dodecane (C12) and n-tetradecane (C14) sold by Sasol respectively under the references PARAFOL 12-97 and PARAFOL 1.4-97, and 1.0 as their mixtures. The volatile linear alkane alone can be used. It is alternatively or preferentially possible to use a mixture of at least two distinct volatile linear alkanes, differing from each other by a number of carbon atoms of at least 1, in particular differing from each other by a carbon number of 1 or 2 According to a first embodiment, a mixture of at least two different volatile linear alkanes having from 10 to 14 carbon atoms and differing from each other by a carbon number of at least 1 is used. examples that may be mentioned include mixtures of linear volatile alkanes C1.0 / C1 I, C1 / C12, or C12 / C13. According to another embodiment, a mixture of at least two distinct volatile linear alkanes having from 10 to 14 carbon atoms and differing from each other by a carbon number of at least 2 is used. mention may in particular be made of volatile linear alkane mixtures ClO / C12, or C12 / C14, for an even number of carbon atoms and the Cl I / C13 mixture for an odd number of carbon atoms. According to a preferred embodiment, a mixture of at least two volatile linear alkanes having 10 to 14 distinct carbon atoms and differing from each other by a carbon number of at least 2, and in particular a mixture of volatile C1-C13 linear alkanes or a mixture of C12 / C14 volatile linear alkanes. Other mixtures comprising more than 2 volatile linear alkanes according to the invention, such as, for example, a mixture of at least 3 volatile linear alkanes having from 7 to 14 distinct carbon atoms and differing from one another in number of carbon atoms of at least 1, are also part of the invention, but the mixtures of 2 linear volatile alkanes according to the invention are preferred (binary mixtures), said 2 volatile linear alkanes preferably representing more than 95% and better than 99 % by weight of the total content of volatile linear alkanes in the mixture. According to one particular embodiment of the invention, in a mixture of volatile linear alkanes, the volatile linear alkane having the smallest carbon number is predominant in the mixture. According to another embodiment of the invention, a volatile linear alkane mixture is used in which the volatile linear alkane having the largest carbon number is predominant in the mixture. By way of examples of mixtures which are suitable for the invention, mention may be made in particular of the following mixtures: from 50 to 90% by weight, preferably from 55 to 80% by weight, and still more preferably from 60 to 75% by weight of C n volatile linear alkane with n ranging from 7 to 14 from 10 to 50% by weight, preferably from 20 to 45% by weight, preferably from 24 to 40% by weight, of volatile linear alkane in C n + x with x greater than or equal to 1, preferably x = 1 or x = 2, with n + x ranging between 8 and 14, relative to the total weight of the alkanes in said mixture. In particular, said mixture of alkanes according to the invention contains: less than 2% by weight, preferably less than 1% by weight of branched hydrocarbons, and / or less than 2% by weight, preferably less than 1% by weight of aromatic hydrocarbons, and / or less than 2% by weight, preferably less than 1% by weight and preferably less than 0.1% by weight of unsaturated hydrocarbons in the mixture. More particularly, a volatile linear alkane suitable for the invention may be used in the form of a n-undea / n-tridecane mixture. In particular, use will be made of a mixture of volatile linear alkanes comprising: from 55 to 80% by weight, preferably from 60 to 75% by weight, of volatile linear alkane in Cl 1 (n-undecane) of 20 to 45% by weight, preferably from 24 to 40% by weight of volatile linear C13 alkane (n-tridecane) relative to the total weight of the alkanes in said mixture.

According to a particular embodiment, the mixture of alkanes is a n-undecaned-tridecane mixture. In particular such a mixture can be obtained according to Example 1 or Example 2 of WO 20081155059. According to another particular embodiment, the n-dod.écane sold under the reference PARAFOL 12-97 by SASOL is used. According to another particular embodiment, n-tetradecane sold under the reference PARAFOL 14-97 is used by SASOL. According to yet another embodiment, a mixture of n-dodecane and n-tetradecane is used. Alternatively or additionally, the composition produced may comprise at least one volatile silicone oil or solvent compatible with a cosmetic use. By silicone oil is meant an oil containing at least one silicon atom, and in particular containing Si-O groups. According to one embodiment, said composition comprises less than 10% by weight of non-volatile silicone oil (s), relative to the total weight of the composition, better still less than 5% by weight, or even is free from silicone oil. As silicone volatile oil, mention may be made of cyclic polysiloxanes, linear polysiloxanes and mixtures thereof. As linear volatile polysiloxanes, there may be mentioned hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, tetradecamethylhexasiloxane and hexadecamethylheptasiloxane. Cyclic volatile polysiloxanes that may be mentioned include hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decarethylcyclopentasiloxane and dodecamethylcyclohexasiloxane. Alternatively or additionally, the composition produced may comprise at least one volatile fluorinated oil. By fluorinated oil is meant an oil containing at least one fluorine atom. As fluorinated volatile oil, there may be mentioned nonafluoromethoxybutane or perfluoromethylcyclopentane, and mixtures thereof. Non-volatile oil The composition according to the invention may optionally comprise at least one non-volatile oil.

The oil may be chosen from hydrocarbon-based oils, silicone oils and fluorinated oils. As the non-volatile hydrocarbon oil, paraffin oil (or petroleum jelly), squalane, hydrogenated polyisobutylene (Parleam oil), perhydrosqualene, mink, turtle, soybean oil, coconut oil, sweet almond, ca.lophyllum, palm, grape seed, sesame, corn, arara, rapeseed, sunflower, cotton, apricot, castor, avocado. jojoba, olive or cereal sprouts; lanolic acid esters, oleic acid, lauric acid, stearic acid; fatty esters, especially of C 1 -C -36, such as isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, diisopropyl adipate, isononyl isononanoate, 2-ethylhexyl palmitate, 2-hexyl-decyl laurate, 2-octyl-decyl palmitate, myristate or 2-octyl-dodecyl lactate, di (2-ethylhexyl) succinate , diisostearyl malate, glycerin triisostearate or diglycerine; behenaric acid, oleic acid, linoleic acid, linolenic acid or isostearic acid, higher fatty alcohols, especially C16-C22 fatty alcohols, such as cetanol, oleic alcohol, linoleic alcohol or linolenic, isostearic alcohol or octyl dodecanol; and their mixtures. The fluorinated oils that can be used in the invention are in particular fluorosilicone oils, fluorinated polyethers and fluorinated silicones as described in document EP-A-847752. The non-volatile oil may be present in a content ranging from% to% by weight, relative to the total weight of the nonvolatile liquid fatty phase, preferably ranging from% to% by weight, and preferably ranging from% to% by weight. weight. Film-forming polymer The composition according to the invention may optionally comprise, in addition to the compound or the mixture of compounds imparting to the composition a spinning character, at least one film-forming polymer. The film-forming polymer may be present in the composition according to the invention in a dry matter (or active material) content ranging from 0.1% to 30% by weight relative to the total weight of the composition, preferably from 0 to 5% at 20% by weight, and more preferably 1% to 15% by weight. The term "film-forming polymer" means a polymer capable of forming on its own or in the presence of an auxiliary film-forming agent, a film which is macroscopically continuous and adheres to the keratinous fibers. Among the film-forming polymers that can be used in the composition of the present invention, mention may be made of synthetic polymers, of free-radical type or of polycondensate type, polymers of natural origin, and mixtures thereof.

The term "free radical polymer" is understood to mean a polymer obtained by polymerization of unsaturated monomers, in particular ethylenic monomers, each monomer being capable of homopolymerizing (unlike polycondensates). The radical-type film-forming polymers may in particular be polymers, or copolymers, vinylic polymers, in particular acrylic polymers.

The vinyl film-forming polymers may result from the polymerization of ethylenically unsaturated monomers having at least one acidic group and / or esters of these acidic monomers and / or amides of these acidic monomers. As monomer carrying an acid group, α, β-ethylenic unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid may be used. It is preferable to use (meth) acrylic acid and crotonic acid, and more preferably (meth) acrylic acid. The acidic monomer esters are advantageously chosen from esters of (meth) acrylic acid (also called (meth) acrylates), in particular alkyl (especially) alkyl (C 1 -C 30) alkyl ethers, preferably C 1 -C 10 aryl (meth) acrylates, in particular C 6 -C 10 aryl, hydroxyalkyl (meth) acrylates, in particular C 2 -C 6 hydroxyalkyl. Among the alkyl (meth) acrylates, mention may be made of methyl methacrylate, ethyl methacrylate, butyl methacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, cyclohexyl methacrylate.

Among the hydroxyalkyl (meth) acrylates, mention may be made of hydroxyethyl acrylate, 2-hydroxypropyl acrylate, hydroxyethyl methacrylate and 2-hydroxypropyl methacrylate. Among the aryl (meth) acrylates, mention may be made of benzyl acrylate and phenyl acrylate.

Particularly preferred (meth) acrylic acid esters are alkyl (meth) acrylates. According to the present invention, the alkyl group of the esters can be either fluorinated or perfluorinated, ie some or all of the hydrogen atoms of the alkyl group are substituted by fluorine atoms. Amides of the acidic monomers include, for example, (meth) acrylamides, and especially N-alkyl (meth) acrylamides, in particular C 2 -C 12 alkyl. Among the N-alkyl (meth) acrylamides, mention may be made of N-ethyl acrylamide. N-t-butyl acrylamide, N-t-octyl acrylamide and N-undecylacrylamide. The vinyl film-forming polymers can also result from the homopolymerization or copolymerization of monomers chosen from vinyl esters and styrene monomers. In particular, these monomers can be polymerized with acidic monomers and / or their esters and / or their amides, such as those mentioned previously. Examples of vinyl esters include vinyl acetate, vinyl neodecanoate, vinyl pivalate, vinyl benzoate and vinyl t-butyl benzoate. Styrene monomers include styrene and alpha-methyl styrene. Among the film-forming polycondensates, mention may be made of polyurethanes, polyesters, polyester amides, polyamides, and epoxy ester resins, polyureas. The polyurethanes may be chosen from anionic, cationic, nonionic or amphoteric polyurethanes, polyurethane-acrylics, poly-urethanes-polyvinylpuridones, polyester-polyurethanes, polyether-polyurethanes, polyureas, polyurea-polyurethanes, and their mixtures. The polyesters can be obtained, in known manner, by polycondensation of dicarboxylic acids with polyols, especially diols, as described above for the sulfopolyester. Polymers of natural origin, possibly modified, may be chosen from shellac resin, sandarac gum, dammars, elemis and copals. cellulosic polymers, and mixtures thereof. According to a first example of composition according to the invention, the film-forming polymer may be a water-soluble polymer and may be present in an aqueous phase of the composition; the polymer is solubilized in the aqueous phase of the composition. According to a variant of the composition according to the invention, the film-forming polymer may be a polymer solubilized in a liquid fatty phase comprising organic oils or solvents such as those described above (it is said that the film-forming polymer is a liposoluble polymer). Preferably, the liquid fatty phase comprises a volatile oil, optionally mixed with a non-volatile oil, the oils may be chosen from the oils mentioned above.

As an example of a fat-soluble polymer, mention may be made of vinyl ester copolymers (the vinyl group being directly connected to the oxygen atom of the ester group and the vinyl ester having a saturated hydrocarbon radical, linear or branched, 1 to 19 carbon atoms, linked to the carbonyl ester group) and at least one other monomer which may be a vinyl ester (different from the vinyl ester already present), an olefin (having from 8 to 28 carbon atoms), an alkyl vinyl ether (the alkyl group of which contains 2 to 18 carbon atoms), or an allyl or methallyl ester (having a linear or branched, saturated hydrocarbon radical of 1 to 19 carbon atoms, bonded to the carbonyl ester group). These copolymers may be crosslinked using crosslinking agents which may be of the vinyl type, or of the allyl or methallyl type, such as tetraallyloxyethane, divinylbenzene, divinyl octanedioate, divinyl dodecanedioate, and octadecanedioate. divinyl. Examples of such copolymers include copolymers: vinyl acetate / allyl stearate, vinyl acetate / vinyl laurate, vinyl acetate / vinyl stearate, vinyl acetate octadecene, vinyl acetate / octadecyl vinyl ether, propionate allyl vinyl laurate, vinyl propionate / vinyl laurate, vinyleloctadecene-1 stearate, vinyl acetate / dodecene-1, vinyl stearate / ethyl vinyl ether, vinyl propionate / cetyl vinyl ether, vinyl stearate / acetate acetate allyl, 2,2-dimethyl-2-vinyl octanoate / vinyl laurate, 2,2-dimethyl-2-allyl pentanoate / vinyl laurate, dimethyl vinyl propionate / vinyl stearate, dimethyl allyl propionate / vinyl stearate, propionate Vinyl / vinyl stearate, crosslinked with 0.2% divinyl benzene, vinyl vinyl vinyl diol dimethyl propionate, crosslinked with 0.2% divinyl benzene, vinyl acetate / octadecyl vinyl ether, crosslinked with 0.2% tetraall yloxyethane, vinyl acetate / allyl stearate, crosslinked with 0.2% divinyl benzene, vinyl acetate / octadecene-1 crosslinked with 0.2% divinyl benzene and allyl propionate / crosslinked allyl stearate with 0.2% divinyl benzene. Liposoluble film-forming polymers that may also be mentioned include liposoluble copolymers, and in particular those resulting from the copolymerization of vinyl esters having from 9 to 22 carbon atoms or of alkyl acrylates or methacrylates, the alkyl radicals having from 10 to 20 carbon atoms. Such liposoluble copolymers may be chosen from copolymers of vinyl polycrystearate, vinyl polystearate crosslinked with divinylbenzene, diallyl ether or diallyl phthalate, copolymers of stearyl poly (meth) acrylate, polyvinylpolate , poly (meth) acrylate lauryl, these poly (meth) acrylates can be crosslinked using dimethacrylate ethylene glycol or tetraethylene glycol. The liposoluble copolymers defined above are known and in particular described in Application FR-A-22 32303; they can have a weight average molecular weight ranging from 2,000 to 500,000 and preferably from 4,000 to 200,000. Liposoluble film-forming polymers that can be used in the invention also include polyalkylenes, and especially copolymers of C2-C20 alkenes, such as polybutene, alkylcelluloses with a linear or branched alkyl radical, saturated or unsaturated, with respect to Cl to CS. such as ethylcellulose and propylcellulose, copolymers of vinylpyrrolidone (VP) and in particular copolymers of vinylpyrrolidone and of C2 to C40 and better still of C3 to C20 alkene. By way of example of a copolymer of VP that may be used in the invention, mention may be made of the copolymer of VP / vinyl acetate, VP / ethyl methacrylate. butylated polyvinylpyrrolidone (PVP), VP / m.ethyl methacrylate / methacrylic acid, VP / eicosene, VP / hexadecene, VP / triacontene, VP / styrene, VP / acrylic acid / lauryl methacrylate. Mention may also be made of silicone resins, generally soluble or swellable in silicone oils, which are crosslinked polyorganosiloxane polymers. The nomenclature of silicone resins is known by the name of "MDTQ", the resin being described as a function of the different monomeric siloxane units it comprises, each of the letters "MDTQ" characterizing a type of unit. As examples of commercially available polymethylsilsesquioxane resins, mention may be made of those sold: by the company Wacker under the reference Resin. MIS. such as Belsil PMS MK: 30 by SHIN-ETSU under the references KR-220L. As siloxysilicate resins, mention may be made of trimethylsiloxysilicate (TMS) resins such as those sold under the reference SRI000 by the company General Electric or under the reference TMS 803 by the company Wacker. Mention may also be made of timethylsiloxysilicate resins sold in a solvent such as cyclomethicone, sold under the name "KL-7312J" by the company Spin-Etsu, "DC 749", "DC 593" by the company Dow Corning. Mention may also be made of silicone resin copolymers such as those mentioned above with polydimethylsiloxanes, such as the pressure-sensitive adhesive copolymers marketed by Dow Corning under the reference BIOPSA and described in document US Pat. No. 5,162,410. silicone copolymers resulting from the reaction of a silicone resin, such as those described above, and a diorganosiloxane as described in document WO 2004/073626.

The film-forming polymer may also be present in the composition in the form of particles in dispersion in an aqueous phase or in a non-aqueous solvent phase, generally known under the name of latex or pseudolatex. The techniques for preparing these dispersions are well known to those skilled in the art. As the aqueous dispersion of film-forming polymer, it is possible to use the acrylic dispersions sold under the names Neocryl XII-90 °, Neocryl A-10700, Neocryl A-10900, Neocryl BT-62 °, Neocryl A-1 .0790 and Neocryl A-523. ° by the company AVECIA-NEORESINS, Dow Latex 432® by the company DOW CHEMICAL, Daitosol 5000 .AD® or Daitosol 5000 SJ® by the company DAITO KASEY KOGYO; Syntran 57600 by the company Interpolymer, Allianz OPT by the company ROHM: HAAS, aqueous dispersions of acrylic or styrene / acrylic polymers sold under the trade name JONCRYL® by JOHNSON POLYMER or the aqueous polyurethane dispersions sold under the names Neorez R.-981 ° and Neorez R-97411 by A.VECIA.-NEORESINS, Avalure UR-405 °, Avalure UR-4100, Swallow UR-425 ", Avalure LTR-4500, Sancure 8750, Sancure 861 ° , Sancure 8780 and Sancure 2060 ° by the company GOODRICH, Impranil 85 ° by the company BAYER, Aquamere H-15110 by the company HYDROMER, sulfopolyesters sold under the brand name Eastman AQ `= by the company Eastman Chemical Products, dispersions Examples of non-aqueous dispersions of film-forming polymer include acrylic dispersions in isododecane, such as Mexomere PAP® from the company, as well as Mexomere IMAM® from Chimex. CHLME.X, dispersions of particles of a grafted ethylenic polymer, preferably acrylic, in a liquid fatty phase, the ethylenic polymer being advantageously dispersed in the absence of additional stabilizer at the surface of the particles as described in particular in the document WO 04/055081. The composition according to the invention may comprise a plasticizer promoting the formation of a film with the film-forming polymer. Such a plasticizer may be chosen from all compounds known to those skilled in the art as being capable of performing the desired function. The composition may also comprise ingredients commonly used in cosmetics such as lipophilic gelling agents, dyestuffs, fillers, fibers and mixtures thereof.

Dyestuff The composition according to the invention may also optionally comprise at least one dyestuff, such as pulverulent materials, fat-soluble dyes and water-soluble dyes. The pulverulent dyestuffs may be chosen from pigments and nacres. The pigments may be white or colored, mineral and / or organic, coated or uncoated. Among the inorganic pigments, titanium dioxide, optionally surface-treated, oxides of zirconium, zinc or cerium, as well as oxides of iron or chromium, manganese violet, ultramarine blue, chromium hydrate and ferric blue. Among the organic pigments, mention may be made of carbon black, D & C type pigments, and lacquers based on cochineal carmine, barium, strontium, calcium, aluminum. The nacres may be chosen from white pearlescent pigments such as mica coated with titanium or bismuth oxychloride, colored pearlescent pigments such as titanium mica with iron oxides, titanium mica with ferric blue or chromium oxide, titanium mica with an organic pigment of the aforementioned type as well as pearlescent pigments based on bismuth oxychloride. Liposoluble dyes are, for example, Sudan Red, D & C Red 17, D & C Green 6, 3-carotene, soybean oil, Sudan Brown, D & C Yellow II, D & C Violet 2, D & C Orange 5 , the yellow quinoline, the annatto. These dyestuffs may be present in a content ranging from 0.01 to 30% by weight relative to the total weight of the composition.

The composition used in the present invention may comprise bodies having non-zero magnetic susceptibility, especially as coloring matter. The concentration of magnetic substances in the composition is, for example, between about 0.05% and about 50% by weight, especially between about 0.1% and about 40% by weight, more preferably between about 1% and about 30% by weight. . The applied composition may comprise magnetic fibers or other aspherical bodies, such as particle or fiber chains. Magnetic particles are described in WO 061037900. Charges The composition according to the invention may further optionally comprise at least one filler. The fillers may be selected from those well known to those skilled in the art and commonly used in cosmetic compositions. The fillers can be mineral or organic, lamellar or spherical. Mention may be made of tala, mica, silica, kaolin, polyamide powders such as Nylon® marketed under the name Orgasol RO by Atochem, poly-F3-alanine and polyethylene, and tetrafluoroethylene polymer powders such as Teflon rz, lauroyl-lysine, starch, boron nitride, expanded polymeric hollow microspheres such as those of polyvinylidene chloride / acrylonitrile such as those sold under the name Expancel® by Nobel Industrie, acrylic powders such as those sold under the name Polytrap® by the company Dow Corning, polymethyl methacrylate particles and silicone resin microspheres (for example Toshiba's Tospearls), precipitated calcium carbonate, carbonate and magnesium hydro-carbonate, hydroxyapatite, hollow silica microspheres (MAPRECOS Silica Beads®), glass microcapsules or ceramic, metal soaps derived from organic carboxylic acids having from 8 to 22 carbon atoms, and in particular from 12 to 18 carbon atoms, for example zinc, magnesium or lithium stearate, zinc laurate, magnesium myristate. It is also possible to use a compound capable of swelling with heat and in particular thermally expandable particles such as unexpanded microspheres of acrylonitrile vinylidene chloride / methyl methacrylate copolymer or of acrylonitrile homopolymer copolymer, for instance those marketed respectively under the references Expancel® 820 DU 40 and Expancel®007WU by the company AKZO NOBEL. The fillers may represent from 0.1 to 25%, in particular from 1 to 20% by weight relative to the total weight of the composition.

The composition of the invention may furthermore comprise any additive usually used in cosmetics, such as antioxidants, preservatives, fibers, perfumes, neutralizers, gelling agents, thickeners, vitamins, coalescing agents, plasticizers, and mixtures thereof. Fibers The composition according to the invention may optionally comprise, in addition to the compound or the mixture of compounds which gives said composition a spinning character, so-called additional fibers. These additional fibers alone do not contribute to the fastness of the composition. By "fiber" it is necessary to understand an object of length L and of diameter D such that L is much greater than D, D being the diameter of the circle in which the section of the fiber is inscribed. In particular, the L / D ratio (or form factor) is chosen in the range from 3.5 to 2500, in particular from 5 to 500, and more particularly from 5 to 150. The fibers that can be used in the composition of the The invention may be fibers of synthetic or natural, mineral or organic origin. They can be short or long, unitary or organized, for example braided, hollow or full. Their shape can be any and in particular of circular or polygonal section (square, hexagonal or octagonal) depending on the specific application envisaged. In particular, their ends are blunt and / or polished to avoid injury. In particular, the fibers have a length ranging from 1 μm to 10 mm, in particular from 0.1 mm to 5 mm and more particularly from 0.3 mm to 3.5 mm. Their section may be in a circle with a diameter ranging from 2 nm to 500 μm, in particular ranging from 100 nm to 100 nm and more particularly from 1 mm to 50 μm. The weight or titer of the fibers is often given in denier or decitex and represents the weight in gram for 9 km of yarn. The fibers according to the invention may in particular have a title chosen in the range from 0.15 to 30 denier and in particular from 0.18 to 18 denier. The fibers that may be used in the composition of the invention may be chosen from rigid or non-rigid fibers, they may be of synthetic or natural, mineral or organic origin.

Furthermore, the fibers may or may not be treated on the surface, coated or uncoated, colored or unstained. As fibers that can be used in the composition according to the invention, mention may be made of non-rigid fibers such as polyamide (Nylon®) fibers or rigid fibers such as polyamide-amide fibers such as those sold under the names KERMELe, KERMEL TECH® by RHODIA or poly- (p-phenyleneterephthalamide) (or aramid) sold especially under the name Kevlar e by the company DUPONT DE NEMOURS. According to one particular embodiment, the composition comprises, as compounds imparting to the composition a spun dmax character of greater than or equal to 5 mm, a mixture of wax, in particular paraffin wax, in particular at a content greater than or equal to 90% by weight. weight relative to the total weight of the composition, and fibers, especially cellulose fibers, for example in a content of 1 to 5% by weight relative to the total weight of the composition.

The additional fibers may be present in the composition according to the invention in a content ranging from 0.01% to 10% by weight, relative to the total weight of the composition, in particular from 0.1% to 5% by weight. weight, and more particularly from 0.3% to 3% by weight. Cosmetic active agents As cosmetic active agents that can be used in the compositions according to the invention, there may be mentioned in particular antioxidants, preservatives, perfumes, neutralizers, emollients, moisturizers, vitamins and especially solar filters. Of course, those skilled in the art will take care to choose any additional additives and / or their amount so that the advantageous properties of the composition according to the invention are not, or not substantially impaired by the addition envisaged.

Description of the Figures The invention will be better understood on reading the following detailed description, non-limiting examples of implementation thereof, and on examining the appended drawing, in which: FIGS. 1 to 3 are block diagrams illustrating examples of methods according to the invention; FIG. 4 schematically represents an exemplary device for implementing the invention; FIG. 5 is a top view according to V FIG. 6 illustrates the heating of the composition with the heating device of FIG. 4; FIG. 7 shows a packaging and application device incorporating a heating device; FIG. FIG. 9 is a diagrammatic and partial axial view of an alternative embodiment of the heating device. FIG. 9 is a perspective view of another embodiment of a packaging and application device incorporating a device. Figure 10 shows the device of Figure 9 after removal of the closure cap; Figure 11 is a top view of the device of Figure 10; Figure 12 is a view similar to Figure 10, the composition block being as FIG. 13 shows in elevation another example of a packaging and application device incorporating a heating device, FIG. 14 schematically and partially in axial section showing the heating device of FIG. FIG. 13; FIG. 15 illustrates the coming of the product in contact with the heating device of FIG. 14; FIG. 1.6 is a diagrammatic perspective view of another example of a packaging and application device produced in accordance with FIG. According to the invention, Fig. 17 is a cross-section according to VII-XVII of Fig. 16. Fig. 18 shows in elevation another alternative embodiment of the conductive device. FIG. 19 is a diagrammatic and partial section of the device of FIG. 8, in the makeup of the eyelashes; FIGS. 20 and 21 are diagrammatic and partial of other examples of makeup devices; FIG. 22 shows schematically and partially an example of arrangement of the heating device with respect to a stick of composition, and FIG. 23 represents another example of a device, produced in accordance with FIG. invention.

We. will subsequently describe examples of devices allowing, inter alia, to implement cosmetic treatment processes keratin fibers. These methods may comprise, as illustrated in FIG. A), a first step 10 of heating an application surface of a piece of the solid product according to the invention with the aid of an artificial source of heat located at outside the piece of product, in particular a surface for applying a product stick, to bring it to a temperature greater than that of a portion of the mass of product which is remote from the application surface and which remains solid during the application, and b) a second step 20 of applying the application surface thus heated to a region to be treated to transfer the product and form son through the running character of the composition. In an alternative embodiment of the invention, the method may comprise: a) a first step of heating an applicator member, b) a second step 40 of taking the composition on a piece of solid composition to using the application member thus heated, the application member causing in contact with the composition a local melting of the outer surface of the piece of composition, and e) a third step 50 of applying the composition on The keratinous fibers forming the threads thanks to the running nature of the composition.

In another variant, as illustrated in FIG. 3, the method may comprise: a) a first step 10 identical to that of the method described with reference to FIG. 1, then b) a second step 60 consisting in transferring the heated composition to a application member, and c) a third step 70 of applying the composition thus transferred to the application member on the keratinous fibers, preferably while the composition is still at a temperature well above room temperature, by example of more than 15 ° C.

The application member on which the composition is transferred can, if appropriate, be heating. FIG. 4 shows an application device 100 that can be used to implement, for example, the method described with reference to FIG.

This device 100 comprises a device for packaging and applying 101 of the product P and a heating device 102, which in the example in question is independent of the device 101 and comprises for example a housing 103 provided with an opening 104 of introduction at least partial of the device 101 for heating the product L. The latter is for example an eyelash makeup composition whose formulation has been described above. The device 101 can be in various forms and defines a gripping surface for the user that allows to manipulate the product p without direct contact with the fingers. The device 101 can also make it possible to move the product P 15 relative to the gripping surface as and when the product p is consumed. The product P is for example in the device 101 in the form of an elongated rod along an axis X, for example of circular cross section. Various mechanisms can be used to cause this relative movement 20 and the device 101 comprises for example a mechanism having two parts 105 and 106 rotatable relative to each other and means for transforming the relative rotation of the parts 5 to 6 in an axial displacement along the axis X. The rod is for example worn, within the aforementioned mechanism, by a cup not shown, having lugs engaged in two parts belonging respectively to parts 105 and 106, one of which has longitudinal straight slots and the other of the helical slots, so that a rotation of these two parts is accompanied by an axial displacement of the cup and the stick. Examples of suitable mechanisms are described in US 6,340,258, US 6,086,276, US 6,371,673, US 5,171,096 and US 7,293,926, the contents of which are incorporated by reference. The packaging and application device 101 may comprise projecting elements, combing the eyelashes, for example in the form of teeth 109, which may be arranged for example in a row around the stick of the product P, as can be seen in Figure 5. The height of the teeth 109 may be between 1 and 10 mm. The teeth 109 may be molded in one piece of plastic material. The teeth 109 may, if appropriate, be molded in one piece with the upper portion 106 of the device 101. The. teeth 109 may be fixed relative to their support. The housing 103 houses an electrical source or comprises means for connection to an electrical source, for example the mains via a low voltage transformer. 1.0 The housing 103 may also include start-up means 110, such as for example an on / off switch, and one or more lights 111 and 112 to signal the power up and / or the end of the setting. product temperature p. The opening 104 enables the end 115 of the stick to be brought near a heating means 120 present in the housing 103, as illustrated in FIG. 6. The opening 104 is for example of section adapted to the device 101, so that the engagement thereof in the housing brings the end 115 of the stick into a predefined position, at least in two directions of space, relative to the means. 120. The heating device 102 may comprise any suitable sensor 121 for detecting the placement of the device 101 on the housing and possibly the positioning of the rod relative to the heating means 120. The heating device 102 may comprise any adapted sensor, capable of evaluating the distance between the end 115 of the rod and the heating means 120, so as to allow it to start only when a predefined distance is respected and / or in order to regulate the heating power as a function of the distance between the heating means and the piece of product. The heating means 120 may be a heating system by emitting infrared radiation towards the end 115 of the stick, for example by means of a halogen or incandescent lamp, or by blowing hot air towards the end 115 The end 115 of the stick may be further heated by exposure to radio-frequency radiation, for example microwaves, focused at the end 115 of the stick or by ultrasonic vibrations.

Heating of the end of the stick can still take place by conduction, in contact with a hot surface. In this case, the heating means comprises a heating surface which can be brought to the appropriate temperature by any heating means, for example an electrical resistance.

Once the end 115 is heated, for example heated to a temperature greater than or equal to 45 ° C, the upper end 115 of the stick can be brought into contact with the makeup eyelashes. If necessary, a movement is exerted to move the product along the eyelashes on contact, in particular by going towards their free end and then moving the product away from the eyelashes, to form extensions. 1.0 In the variant embodiments of FIGS. 7 to 9, the heating device comprises a heating means which is integral with the conditioning and application device 101 and which may comprise, as illustrated, a ring-shaped heating element, crossed by the stick. The heating element is, for example, of section greater than or equal to that of the rod. The heating device comprises for example a control member 171 on which the user can press to trigger the operation of the heating member. The latter comprises for example a heating resistor that allows to heat by conduction, convection and / or radiation the end of the stick. In order to use the device illustrated in FIG. 7, the user brings the end of the rod to the level of the heating element and triggers the heating by pressing on the control member 171. The heating device may comprise an indicator light signaling to the user the operation of the heater and / or that the operating temperature is reached. The user can optionally interrupt the heating when he visually observes that the end of the stick has changed in appearance due to the temperature rise, for example has become glossy. The user can then bring the surface of the softened product into contact with the eyelashes. In the variant illustrated in FIG. 8, the rod passes at its upper end through an opening 174 of section narrowed with respect to the section of the body of the stick.

The softening of the rod in contact with the heating element can be accompanied, in this example, by a deformation of the end of the stick and allows the product to exit. The narrowed opening can increase the application accuracy of the product and prevent the stick from being advanced relative to the heater until sufficient softening is achieved. In the variant of FIGS. 9 to 12, the heating device is integrated in the packaging device, for example near the upper part of the packaging device, carrying the elements 109 for combing the eyelashes. The packaging device may comprise a body 180 which houses the product rod P, which has, for example, as can be seen in particular in FIG. 11, a generally flattened shape in cross section. The product stick P may have a reniform cross section, of curvilinear major axis C, in order to follow the natural curvature of the eyelash fringe. The product can be carried by a support piece that can be moved relative to the body 180 by a user-operated slider 181, which can slide for example between two longitudinal grooves 182. The device can comprise a base 185 which houses, for example the electrical source and supports a switch 186 on / off and, where appropriate, one or more LEDs 187 relating to the operation of the device. FIG. 13 shows an alternative embodiment of the device 100 in which the heating device 102 is integrated in a cover 190 which makes it possible to heat the end 115 of the product stick P before it is applied to the keratin materials. The heating device 102 can accommodate an invisible electrical source, for example consisting of one or more batteries or accumulators, and a heating element comprising, for example, an electrical resistance supplied by the electrical source. Examples of suitable heaters are disclosed in US 2007/0286665 A1, for example. The heating member is arranged to raise the temperature of a heating surface 200 which, in the example of FIGS. 13 to 15, can come into contact with the stick, as illustrated in FIG. 15, in order to raise the temperature of the distal end 115 thereof. The heating device 102 may comprise a switch 110 allowing the user to start or stop the heating device and an operating indicator 201, for example a light which lights up when the heating surface is being heated. The heating device 102 may optionally include any means for regulating the temperature of the heating surface 200 so that it does not exceed a predefined value.

When the. heating surface is inaccessible to the user, a relatively high heating temperature but compatible with the product can be accepted. On the other hand, when the heating surface can be contacted by the user, a temperature not exceeding 65 ° C. is preferred. The heating device 102 may also, if necessary, include a delay that allows the piece to be warmed up. of product only for a predefined period, in order to avoid premature wear of the electrical energy source and / or avoid wearing the entire piece of product at an excessive temperature. In certain exemplary embodiments, the heating device 102 may include any sensor adapted to trigger the operation of the heating only in case of. effective contact of the heating surface with the piece of product. For example, the heater 102 may include a contact pressure sensor between the heating surface 200 and the stick, and allow heating of the heating surface 200 only in the event of actual contact with the stick. The heating surface 200 may be defined for example by a contact piece 210, for example axially movable along the axis X relative to the body 205 of the heating device, against the action of return of an elastic return member 206, such as, for example, a spring housed inside the contact piece 210, as illustrated in FIG. 15. In this FIG. 15, there is shown a heating device comprising an electrical resistance element 215 plated in the bottom of the piece of contact 210, so as to be closer to the heating surface 200.

The contact piece 210 is for example made of a good heat-conducting metal, with a small wall thickness, so as to have a low thermal inertia, for example aluminum. In this example as in the previous ones, the rod may have a cross section of between 0.1 and 5 cm 2. The device can be used by first igniting the heater 102 and then waiting for the time necessary for the end 115 of the stick which defines the application surface to be brought to the desired temperature. The temperature may for example be indicated by the indicator 201, which may for example go from a continuous ignition state signaling the start of the device to a flashing ignition or change color when the desired temperature is reached. Once the end of the rod is heated, the device 101 can be separated from the cover 190 and the user can apply the product to the eyelashes. The softening of the product at the end 115 of the stick ensures a comfortable application, a good transfer on the eyelashes with a thick deposit. The body of the rod is at ambient temperature or at a slightly higher temperature, but insufficient to compromise the mechanical strength necessary to withstand the mechanical stresses generated by the manufacture of the device 101 and the application. The temperature difference between the application surface and the body of the stick, in particular opposite the application surface, is, for example, at least 20 ° C., or even at least 30 ° C., when the stick has its initial length, the first use.

The device 100 shown in FIG. 16 combines a packaging and application device 101 and a heating device 102. The product is for example in the form of a stick, which may be solid or hollow and supported by a core. in a different material, for example a thermoplastic material. In the example of FIG. 16, the application surface is defined by the lateral surface 310 of the product rod, this lateral surface being, for example, a portion of a cylinder of revolution. The device 100 may comprise a handle 312 which can accommodate for example an electrical source constituted by one or more batteries or accumulators. The handle is extended by a wall 314 which can carry or define as seen in Figure 16 of the elements 109 for combing the eyelashes. The device 100 may comprise, opposite the handle 312, a wheel 316 which may allow for example the user to rotate the product relative to the heater 102. The latter is for example arranged, as seen in FIG. 17, on an inner face of the wall 314 and comprises, for example, one or more resistive wires 318. In an exemplary embodiment, the wall 314 can rotate relative to the handle, which may allow, for example, heating a portion covered by the wall 314 and once the desired temperature reached, discover this portion by rotating the wall 314 to be used for combing keratin fibers. In a variant, the rotation of the wheel 316 causes the piece of product P to move, the wall 314 being fixed relative to the handle 312. In another variant not shown, the product stick extends in the extension of the handle with its longitudinal axis coinciding with that of the handle and the side surface of the product rod is heated by means of the heating device housed in a feinieture hood which is fixed on the handle and cover the stick of product. In some embodiments, particularly as described above, the heated surface of the piece of product can be moved on the eyelashes by the user, for example by going to the tip of the eyelashes. Eyelashes may not be pressed against the product. In the variant embodiment illustrated in FIGS. 18 and 19, the eyelashes H can be gripped between, on the one hand, the piece of product P and, on the other hand, the heating device. The eyelashes may be engaged between teeth 109 or other eyelash combing member as they are held by the heater 102 against the piece of product, as shown in Figure 1.9. In the embodiment of FIG. 18, the heating device 102 can be moved away from or closer to the piece of product, for example being mounted on rods 330 which can slide in the device 101, for example against the return action. an elastic member such as a spring. Uni slider 332 can move the piece of product P within the device 101 to make it up as it wears. The hot surface of the heater 102 is carried by a piece 334 which is mounted on the rods 330 and which can be brought closer to the piece of product when the user presses it. To use the device of Figure 18, the user can for example press the part 334 so as to bring the hot surface 336 of the heating device 102 into contact with the end face of the piece of product P, then once the product sufficiently softened on the surface, spread the piece 334 to allow the eyelashes to be engaged between this piece and the piece of product and then bring the piece 334 closer to the piece of product so as to press the eyelashes against the piece of product, as illustrated in FIG. 19. T 0 In the variant of FIG. 20, the piece of product is in the form of a sleeve carried by a core 340 which can be rotated, in order to create a relative movement between the eyelashes and the surface of the product without the user having to move the product. The eyelashes H may be pressed against the product by a pressure roller 350 which may comprise a heater or be heated by a heater. The product P on the one hand and the pressure roller on the other hand can be carried for example by two branches of a clamp, which allows to separate them or bring them at will. FIG. 21 shows an alternative embodiment in which the product is not applied directly by a contact of the eyelashes H on the piece of product but via a transfer member 360. In this example, the transfer member is for example heated to a temperature sufficient to soften the product and take it, and can transfer the product on the eyelashes by turning for example both in contact with the product and the eyelashes, as shown in Figure 21 The piece of product P may optionally be pressed against the transfer member 360 by a spring 361, which makes it possible to guarantee contact of the product and the transfer member despite the wear of the product. In a variant, the product is heated at its contact surface with the transfer member 360, the latter not being heated. In the variant of FIG. 22, it is illustrated that the product P can be in the form of a product block whose lateral surface 370 is used for application to the eyelashes and the heating device 102 can have a resistive element 371 wound around the product rod so as to heat its lateral surface.

In Figure 23, there is illustrated the possibility for the heater 102 to include one or more application members 372, for example teeth, bristles or ribs. These application elements make it possible to comb the eyelashes. A hot source is arranged for example under these application elements to raise their temperature sufficiently and allow, upon contact of the application member 373 of the heating device 102 with the piece of product P. to take some amount and then make up the eyelashes with. The applicator member 312 is for example connected by a rod 374 to a handle 375 which can accommodate an electrical source constituted by one or more batteries or accumulators. 1.0 In another variant, the device is similar to that of Figure 16, the product P being rotated relative to the handle by a mechanical system, a portion of its lateral surface thus automatically passing from a position where it is located facing the heating device and can be heated by it to a position remote from the heating device, for example diametrically opposite where it can contact the eyelashes. A means for selecting the direction of rotation may be provided to allow rotational movement of the medium to the tip of the eyelashes. The product and the heating device may be provided with a means for cutting the product extensions at the end of the eyelashes, for example to standardize their length. For example, the heater is initially packaged with cutters or scissors or is provided with a cutter. The product according to the invention may also be provided, where appropriate, with a composition serving as a base coat to facilitate makeup removal, within the same packaging device or as a top coat for coloring the extensions.

EXAMPLES The following examples are presented by way of illustration and not limitation of the invention. Unless otherwise indicated, proportions are by mass.

EXAMPLE 1 A stick of composition having a hot-running character is prepared by hot mixing (90 ° C.) of 95% by weight of a mixture of ethylene / VA copolymer (55.5%), paraffin (44%) and %) and preservative (0.5%) with 5% black iron oxide. A casting step of the stick in a mold is then carried out, followed by a cooling step in the freezer at 28 ° C for 45 minutes. After returning to room temperature, the stick obtained is hard. It is not makeup at room temperature, but heated to 60 ° C becomes makeup and spinning. The rod is for example used in one of the devices described above, to heat it on the surface. Locally heated product may be formed with extensions of several mm on a false eyelash specimen as shown in Figure 24. Example 2

A mascara stick was prepared having the following composition: National Starch Phase A Coolbind 34-1300 43% Phase B Octyldodecanol 6.18% Black Iron Oxide 1.7% Phase C 79.5% Cetyl Phosphate Mixed with Acid phosphoric, cetyl alcohol and water (Givaudan Arlatone MAP 160K) 2.54% Peg-30 glyceryl stearate 6.18% Acrylamide / sodium acyloyldimethyltaurate copolymer 0.68% MA * 600, Seppic) (Simulgel Preservatives qs Water qs 100% * MA = active ingredient Procedure This mascara is prepared in a twin-screw extruder mixer (PRISM type from THERMO ELECTRON CORPORATION, England) with 6 independent sleeves, each allowing the introduction of a new phase and setting the temperature.

They are numbered from 1 to 6 from the input to the output of the product. The flow rate is 2kglh (1000RPM). The ingredients of phases A. and B are introduced respectively into the first and second sleeves, in which they are heated to 150 ° C. The ingredients of phase C, previously heated to 80 ° C., are introduced into the second sleeve, in which the 3 phases are hot-kneaded. The composition is then poured and then cooled to recover at room temperature. This mascara has a spun character, when heated on the surface, with 10 son of 23 mm on average. The resulting yarns are fine, rigid and black. They are rigid enough not to bend under their own weight, remaining vertical. EXAMPLE 3 A mascara stick having the following composition was prepared: National Starck Phase 43 Coolbind 34-1300 43% Phase B 20 Cctyldodecanol 6.18% Phase C 79.5% Ceylon Phosphate Phosphate Mixed with 2.54% Phosphoric Acid cetyl alcohol and water (Givaudan Arlatone MAP 160K) 25 Peg-30 glyceryl stearate 6.18% Acrylamide / sodium acyloyldimethyltaurate copolymer 0.68% MA * 600, Seppic) (Simulgel Preservatives qs Water qs 100% * MA = active ingredient This mascara stick is prepared according to the same procedure as detailed in Example 2.

This mascara has a spinning character, when heated on the surface, with son of 23 mm on average. The resulting yarns are fine, rigid and black. They are rigid enough not to bend under their own weight, remaining vertical.

Example 4 A mascara stick was prepared having the following composition:

Coolbind 34-1300 from National Starck 20/0 Octyldodecanol 8.67% Potassium. 79.5% cetyl phosphate mixed with phosphoric acid, cetyl alcohol and water (Arlatone MAP 160K from Givaudan) 3.57% Peg-30 glyceryl stearate 8.67% Acrylamide copolymer / AMPS Na in isohexadecane with polysorbate 80 (Simulgel 600 from SEPPIC) 0 , 96% MA Preservatives qs Black iron oxide 2.4% Water qs 100%

Procedure: Ethylene vinyl acetate, octyl dodecanol, PEG-30 glyceryl stearate, potassium cetyl phosphate and the pigments with strong stirring are mixed hot (about 95 ° C.). The emulsion is then carried out by adding part of the aqueous phase (water and acrylanlidelsodium acryloyldimethyltaurate copolymer and preservatives) heated to 85 ° C. and after 10 minutes with vigorous stirring at 80 ° C., the remainder of the aqueous phase, which remains at room temperature. The resulting mascara is black, shiny and smooth. It has a spinning character, when heated on the surface, with wires of 20 mm on average. The resulting yarns are fine, soft and black.

EXAMPLE 5 A mascara stick having the following composition was prepared: National Starch Coolbind 34-1300 20% Octyldodecanol 8.67% 79.5% Potassium Cetyl Phosphate Mixed with Phosphoric Acid, Cetyl Alcohol and Water (Arlatone MAP 160K from Givaudan) 3.57% Peg-30 glyceryl stearate 8.67% Copolymer Acrylamide / AMPS Na in isohexadecane with polysorbate 80 (Simulgel 600`x 'from SEPPIC) 0.96% MA Preservatives qs 10 Water qs 100%

Operating mode:

Ethylene vinyl acetate, octyldodecanol, PEG-30 glyceryl stearate and potassium cetyl phosphate are mixed hot (about 95 ° C.) with vigorous stirring. The emulsion is then made by adding part of the aqueous phase (water and acrylanide / sodium acryloyldimethyltaurate copolymer and preservatives) heated to 85 ° C. and after 10 minutes with vigorous stirring at 80 ° C., the residue of aqueous phase is added, remained at room temperature. The resulting mascara is black, shiny and smooth. It has a spinning character, when heated on the surface, with wires of 20 mm on average. The resulting yarns are fine, supple and black.

Example 6 A mascara stick was prepared having the following composition: 30% styrene / butadiene copolymer (Eliokem S5 PLIOLITE) Copolymer Acrylamide / AMPS Na in 2.4% isohexadecane with polysorbate 80 (Simulgel 600® from SEPPIC) Polyethylene stearate glycol (30 OE) 8.67% (Myr 52 P of Uniquema) Potassium cetyl phosphate 79.5% mixed with 3.57% phosphoric acid, cetyl alcohol and water (Arlatone MAP 160K Givaudan) Pigments (oxide of iron) 2.4% Isododecane 20% Water Qsp 100 This mascara has drnax running character, measured according to the protocol indicated above, of about 24 mm.

EXAMPLE 7 A mascara stick having the following composition is prepared. 30% styrene / butadiene copolymer (Eliokem S5 PLIOLITE S5E) Acrylamide / AMPS Na copolymer in 2.4% isohexadecane with polysorbate 80 (Simulgel 600 'from SEPPIC) Polyethylene glycol stearate ( 0) 8.67% (Myrj 52 P of Uniquema) Potassium cetyl phosphate 79.5% mixed with 3.57% phosphoric acid, cetyl alcohol and water (Arlatone MAP 160K Givaudan) Isododecane 20% Water Qspl00 This mascara has a filament character dmax, measured according to the protocol indicated above, of about 24 mm. EXAMPLE 8 A mascara stick having the following composition is prepared: Sulfopolyester (EASTMAN 30% MA CHEMICAL Eastman AQ 38 S) AcrylamidelAMPS Na copolymer in 2,4% isohexadecane with polysorbate 80 (Simulgel 600® from SEPPIC) Polyethylene glycol stearate (30 0E) 8.67% (Uniquema's M.P. 52.M.) 79.5% Ceylon Phosphate mixed with 3.57% phosphoric acid, cetyl alcohol and water (Givaudan Arlatone MAP 1601.) 1 Butylene glycol 20% Pigments (iron oxide) 2.4% Water QsplOO The dmax of the composition is measured according to the protocol indicated above: this mascara has a dmax of approximately 13 mm.

Example 9 A mascara stick having the following composition is prepared: Sulfopolyester (EASTMAN Eastman AQ 38 S 30% MA CHEMICAL) Acrylamide / AMPS Na copolymer in 2.4% isohexadecane with polysorbate 80 (Sirulgel 600`x 'from SEPPIC) Stearate of polyethylene glycol (30 OE) 8.67% (Myrj 52 P of Uniquerna) Potassium cetyl phosphate 79.5% mixed with 3.57% phosphoric acid, cetyl alcohol and water (Arlatone MAP 160K from Givaudan) Butylene glycol 20% Water Qsp100 The dmax is measured. of the composition according to the protocol indicated above: this mascara has a dmax of about 13 mm. EXAMPLE 10 A solid mascara stick comprising 100% polyvinyl acetate homopolymer (RAVIFLEX BU S from Vinavil) is prepared. This mascara has a filament character dmax, measured according to the protocol indicated above, of about 29 mm. The composition is placed on the heating portion of a heating applicator to essentially soften only the outer surface of the stick. The mascara is then applied to the eyelashes by stretching the deposit with the aid of the applicator.

Example 11 A mascara stick was prepared having the following composition: Ethylene ketene copolymer (AFFINT Y GA 1900 from Dow Plastics) 33% Octyldodecanol 7.26% 79.5% Potassium cetyl phosphate mixed with phosphoric acid, cetyl alcohol and water (Givaudan Arlatone MAP 160K) 2.98% Peg-30 glyceryl stearate 7.26% Copolymer Acrylamide / AMPS Na in isohexadecane with polysorbate 80 (Simulgel 600 'from SEPPIC) 0.8% MA Preservatives qs 20 Iron oxide blacks 2% Water qs 100%

We measure the dmax of the. composition according to the protocol indicated above: this mascara has a dmax of about 8 mm. EXAMPLE 12 A mascara stick was prepared having the following composition: Ethylene / Octene Copolymer (AFFINITY GA 1900 from Dow Plastics) 33% Octyldodecanol 7.26% Potassium Ceyl Phosphate 79.5% Mixed with Phosphoric Acid, Alcohol cetyl and water (Givaudan Arlatone MAP 160K) 2.98% Peg-30 glyceryl stearate 7.26% Copolymer Acrylamide / AMPS Na in isohexadecane with polysorbate 80 (Simulgel 600 'from SEPPIC) 0.8% MA Preservatives qs Water qs 100 The drnax of the composition is measured according to the protocol indicated above: this mascara has a dmax of about 8 mm.

Example 13 A mascara having the following composition was prepared: Ethylenevinyl acetate copolymer (Dupont ELVAX 210W) 20% Octyldodecanol 8.67% 79.5% Potassium cetyl phosphate mixed with phosphoric acid, cetyl alcohol and water (Arlatone MAP 160K of Givaudan) 3,57% Peg-30 glyceryl stearate 8,67% Copolymer AcrylamidelAMPS Na in isohexadecane with polysorbate 80 (Simulgel 600 "of SEPPIC) 0.96% MA Preservatives qs Iron oxide black 2.4% Water qs 100% The dmax of the composition is measured according to the protocol indicated above: this mascara has a dmax of about 10 mm.

EXAMPLE 14 A mascara having the following composition was prepared: Ethylene / vinyl acetate copolymer (Dupont ELVAX 210W) 20% Octyldodecanol 8.67% Potassium cetyl phosphate 79.5% mixed with phosphoric acid, cetyl alcohol and water (Arlatone) MAP 160K from Givaudan) 3.57% Peg-30 glyceryl stearate 8.67% Copolymer Acrylamide / AMPS Na in isohexadecane with polysorbate 80 (Simulgel 600`x 'from SEPPIC) 0.96% MA Preservatives qs Water qs 100% Measured the dmax of the composition according to the protocol indicated above: this mascara has a dmax of about 10 mm. Example 15 A mascara stick was prepared having the following composition: 35% Ethylene ketene Copolymer (Dow Plastics AFF11 ~ 1ITY GA 1900) Paraffin wax 15% Glycerine 4.5% Potassium cetyl phosphate 79.5% mixed with acid phosphoric, cetyl alcohol and water (Arlatone MAP 160K from Givaudan) 2.5% Preservatives qs Water qs 100% The ethylene ketene copolymer, paraffin, glycerin and potassium cetyl phosphate are mixed hot with vigorous stirring (about 95 ° C.) . The emulsion is then carried out by adding a part of the aqueous phase heated to 85 ° C. and then, after 10 minutes with vigorous stirring at 80 ° C., the remaining aqueous phase, which remains at room temperature, is added. After pouring, a white mascara is obtained. The dmax of the composition is measured according to the protocol indicated above: this mascara has a dmax of about 7 mm. EXAMPLE 16 A mascara stick was prepared having the following composition: 41.47% Ethylene / vinyl acetate copolymer (Dupont ELVAX 205W) Styrene / Styrene copolymer styrene indene hydrogenated stenyl 48.53% (Eastmann REGALITE R1100) 10.00% Wax of paraffin. The ingredients are mixed at 140 ° C. After casting the rod, it is allowed to cool to room temperature. A solid mascara stick of white color is obtained. The dmax of the composition is measured according to the protocol indicated above: this mascara has a dmax of about 30 mm. After heating on the surface, this mascara forrn.e thin threads, flexible and transparent. Example 17 A mascara stick was prepared having the following composition: National Starck Coolbind 34-1300 96% Black Iron Oxide 4% The ingredients are mixed at 100 ° C. After casting the rod, it is allowed to cool to room temperature. A solid black mascara stick is obtained. The dmax of the composition is measured according to the protocol indicated above: this mascara has a dmax of about 35 mm. Example 18 A mascara stick was prepared having the following composition: 98% Polyphenylsiloxane T-resin (Dow Corning (R) Z-6018 internmediate) 2% Pigments The ingredients are mixed at 00 ° C. It is allowed to cool, after casting the rod, at room temperature. A stick of colored solid mascara is obtained.

The dmax of the composition is measured according to the protocol indicated above: this mascara has a dmax of approximately 25 mm. After heating on the surface, this mascara forms rigid and thick colored threads.

Example 19 A mascara stick was prepared by melting paraffin wax, heat dispersing (80 ° C) pigments and fibers, and then flowing and allowing the resulting mixture to cool. Said mascara stick has the following composition: Paraffin Wax 95% Pigment 2% Cellulose Fibers 1.3 mm in Length 3% (Clarity Flock Corporation N0003 M04 Dock Radius) The dmax of the composition is measured according to protocol indicated above: this mascara has a dmax of about 6 mm. After heating on the surface, this mascara forms fine and colored threads.

Exe2 The following mascara was prepared by melting the Coolbind and heat dispersing (95 ° C) the pigments and fibers. National Starck Coolbind 341300 95% Pigment 2% Cellulose Fibers 1.3mm in Length 3% (Claremont Flock Corporation Floyd Corporation Clarity Flock Corporation N0003 M04)

The dmax of the composition is measured according to the protocol indicated above: this mascara has a dmax of approximately 28 mm. After heating on the surface, this mascara forms rigid and thick colored threads.

The invention is not limited to the examples described. One can for example make the piece of product with other shapes than a rod shape. The expression "comprising one" must be understood as being synonymous with "having at least one".

Claims (16)

REVENDICATIONS1. A process for the cosmetic treatment of human keratin fibers, comprising the steps of: e) heating in contact with or in the vicinity of a heating device, an outer surface of a piece of solid product at a temperature greater than or equal to 40 ° C the product comprising a compound or mixture of compounds imparting a hot-running character of dnax 5mm, so as to heat said piece in a localized manner so as essentially to soften only said outer surface, and d) to apply the product thus softened on the fibers to be treated, in particular the eyelashes. 2. A process for the cosmetic treatment of human keratin fibers, comprising the steps of: a) heating in contact with or in the vicinity of a heating device, an outer surface of a piece of solid product, the product comprising at least one compound selected from polymers and copolymers comprising at least one alkene monomer, and vinyl polyacetate homopolymers, so as to heat said piece locally so as essentially to soften only said outer surface, and b) to apply the product thus softened on the fibers to be treated, in particular eyelashes. 3. The process of claim 1 or 2 wherein the compound or compounds are selected from ethylene-based copolymers. 4. Method according to one of claims 1 to 3, the temperature at which the extén.eure surface is worn being greater than or equal to 50 ° C. 5. Process according to any one of claims 1 to 4, the piece of product having a rod shape. 6. Method according to the preceding claim, the heated outer surface being defined by the distal end of the piece of product. 7. The method of claim 5, the heated outer surface being defined by at least a portion of the side surface of the piece of product. 8. A method according to any one of the preceding claims, the piece of product having a core remaining at a temperature of less than or equal to 30 ° C during the application, for an ambient temperature of 20 ° C. 9. The process as claimed in any one of the preceding claims, wherein the softened product is brought into contact with keratinous fibers while the softened product is carried by the piece of product. 10. Method according to any one of claims 1 to 8, the softened product being brought into contact with the fibers after transfer of the softened product on a support for the application. 11. Method according to any one of the preceding claims, the heating device heating at least one surface of a material other than the product, used for the application. 1.0 12. Method according to the preceding claim, the keratin fibers being engaged between elements protruding combing fibers during the application of the product. 13. A process according to any one of the preceding claims, the product being of shear hardness at 20 ° C greater than or equal to 375 g / m 2, and in particular of between 375 g / m and 15000 g / m 2. 14. Apparatus for packaging and applying a product intended for application to human keratin fibers under a solid piece, in particular a stick, the product comprising a compound or mixture of compounds giving it a hot-running character, preferably of 5 mm dmax, the device comprising: the piece of solid product, the latter having an outer surface; a heating device which can be brought into contact with or in the vicinity of said outer surface to heat said piece locally to a temperature of 40 ° C or higher so as to essentially soften only said outer surface. 15. Device according to claim 14, the product being shear hardness at 20 ° C greater than or equal to 375 g / m, and in particular between 375 g / m and 15000 g / m. 16. The device of claim 14 or 15, the product comprising a compound selected from polymers and copolymers, comprising at least one alkene monomer, and polyvinyl acetate homopolymers.