WO2015181786A1

WO2015181786A1 - Cosmetic treatment of keratin fibres

Info

Publication number: WO2015181786A1
Application number: PCT/IB2015/054055
Authority: WO
Inventors: Henri Samain; Franck Giron; Stéphane DOUEZAN
Original assignee: L'oreal
Priority date: 2014-05-30
Filing date: 2015-05-29
Publication date: 2015-12-03
Also published as: FR3021549B1; FR3021549A1

Abstract

The present invention is directed towards a cosmetic assembly, of use for the treatment of keratin fibres, comprising a fluid cosmetic composition containing at least one compound which is activatable by means of a physical or chemical stimulus, said composition being solidifiable via the conversion of the activated form of said compound into a solid material, by self-reaction and/or interaction with at least one supplementary compound; and a device (1) comprising a mould (2), the mould (2) comprising at least one cavity (5), into which or each of which at least one of said fibres can be at least partially introduced, for the purposes of moulding said composition onto at least one part of said fibre(s) present in the cavity or cavities (5). The present invention is also directed towards a process for cosmetic treatment of one or more keratin fibres.

Description

COSMETIC TREATMENT OF KERATIN FIBRES

The present invention aims to provide, for the field of keratin fibre care and/or makeup, a novel treatment which is quite particularly advantageous from the viewpoint of the new technical performance levels that it confers.

The term "keratin fibres" is intended to mean preferably human keratin fibres, in particular the eyelashes, the eyebrows, body hair and the hair, and preferentially the eyelashes or the eyebrows.

Generally, keratin fibres, and more particularly eyelashes, are commonly made up in order to confer thereon greater visibility and/or an original appearance.

In order to achieve this objective, the makeup technique most used is the application of mascara. The latter is generally effective, but it remains, however, to be improved in terms of gain in visibility.

To date, this gain has essentially been obtained by increasing the amount of material deposited on the eyelashes via an increased repetition of the number of brushstrokes dedicated to the application of the composition to the surface of the eyelashes. However, this solution is not satisfactory.

Indeed, at each new deposit, material is also removed. In addition, the creation of unattractive overloads and/or agglomerates is general ly observed.

Finally, this makeup method does not make it possible to obtain certain aesthetic effects which are highly appreciated by users, for instance the obtaining of a coating on the eyelashes which is very smooth, or even has an advantageous gloss provided by this smoothing effect.

The documents FR 2 936 420 Al, FR 2 923 381 Al , US 2007/286831 Al and WO 2006/043544 Al disclose application of mascara with mascara brushes.

Another makeup technique known to increase eyelash visibility is based on the use of additional fibres, for example false eyelashes, which are in particular stuck to the natural eyelashes.

A first variant of this technique consists in sticking false eyelash fringes to the eyelid. Such false eyelash fringes, and also the processes for producing them, are described in patents US 2 421 432 and US 3 559 657. Nevertheless, putting them on remains difficult and the result remains not very natural. In addition, persistence is weak, and generally limited to a day.

A second variant of this technique consists in sticking false eyelashes one by one to the eyelashes. Although longer lasting, this technique is expensive, takes a long time to perform, and can only be carried out by an individual who works in the profession.

There remains therefore a need for a makeup method which makes it possible to obtain effects of large volume and/or of great length, and which does not have the abovementioned drawbacks. In particular, there remains a need for a method for making up keratin fibres which makes it possible to easily and rapidly create new effects on the keratin fibres, including the smooth and glossy coating effect, of sheath type.

The invention aims specifically to meet these needs.

Thus, a subject of the present invention is a cosmetic assembly, of use for the treatment of keratin fibres, in particular the eyelashes and the eyebrows, comprising:

- a fluid cosmetic composition containing at least one compound which is activatable by means of a physical or chemical stimulus, said composition being solidifiable via the conversion of the activated form of said compound into a solid material, by self-reaction and/or interaction with at least one supplementary compound; and

- a device (1) comprising a mould (2), the mould (2) comprising at least one cavity (5), and preferably several cavities (5), into which or each of which at least one of said fibres can be at least partially introduced for the purposes of moulding said composition onto at least one part of said fibre(s) present in the cavity or cavities (5).

Preferably, a composition according to the invention solidifies by self-reaction of the activatable compound or by interaction of the activatable compound with at least one supplementary compound, the interaction being of covalent or non-covalent type.

Against all expectations, the invention makes it possible to accurately and reproducibly control the shape of the deposit of composition on the fibres treated, regardless of the dexterity of the individual. Furthermore, this makeup method makes it possible to obtain makeup results thus far unobtainable using conventional techniques, in particular, it makes it possible to significantly extend the length of the keratin fibres and to increase the thickness of the makeup deposit, while providing a smooth and homogeneous, or even glossy, effect. Moreover, it also makes it possible to integrate, into the sheath of makeup produced at the surface of the eyelashes, additional fibres like those consi dered for false eyelashes.

According to another of its aspects, a subject of the invention is also a process for cosmetic treatment of one or more keratin fibres, in particular of one or more eyelashes or eyebrows, comprising at least the step consisting in moulding a fluid cosmetic composi tion, containing at least one compound which is activatable by means of a physical or chemical stimulus, said composition being solidifiable via the conversion of the activated form of said compound into a solid material, by self-reaction and/or interaction with at least one supplementary compound, onto at least one part of said fibres, by means of one or more cavities (5), of a mould (2). into which said fibres are at least partially introduced.

According to yet another of its aspects, the present invention relates to the use of a fluid cosmetic composition containing at least one compound which is activatable by means of a physical or chemical stimulus, said composition being solidifiable via the conversion of the activated form of said compound into a solid material, by self-reaction and/or interaction with at least one supplementary compound, for application thereof as a moulding material in at least one cavity of a mould, for the purposes of depositing on keratin fibres, in particular eyelashes and eyebrows, via the application of said mould to said fibres.

Cosmetic composition

As previously mentioned, a cosmetic composition under consideration in the context of the invention is fluid at ambient temperature and contains at least one compound which is activatable by means of a physical or chemical stimulus.

For the purposes of the invention, the description "fluid" is intended, to characterize the fact that a composition according to the invention is not solid. In other words, it manifests a fluidity sufficient to have flow properties.

Thus, a composition according to the invention may advantageously have a viscosity of less than 100 Pa.s, preferably between 0.1 Pa.s and 50 Pa.s, preferably between 1 Pa.s and 50 Pa.s, at ambient temperature and pressure, the viscosity being in particular measured using a Rheomat RM100^®. A composition according to the invention lends itself to solidification via the conversion of the activated form of an activatable compound into a solid material, by self- reaction and/or interaction with at least one supplementary compound.

The crosslinking carried out may be of the AA or AB type.

Thus, the composition is fluid before reaction and becomes solid after reaction.

For the purposes of the invention, an "activatable" compound is a compound or a species which reacts characteristically in response to a physical or chemical stimulus.

In particular, the physical or chemical stimulus may be a variation in light, for example UV or visible light, in H, in temperature or in degree of humidity, or else the bringing into contact with at least one reagent which may or may not be different from the supplementary compound.

Thus, in response to such a stimulus, the activated form of the activatable compound is converted into a solid material, then inducing the solidification of the composition containing it.

According to a first embodiment variant, the composition is solidifiable by self-reaction of the activatable compound.

In this variant, the activatable compound reacts with itself or on itself in response to a physical or chemical stimulus.

More particularly, the activatable compound, is a photosensitive compound.

Thus, the stimulus may be a variation in light, for example UV or visible light. Such a stimulus may generate crosslinking of the activatable compound.

Thus, the activatable compound is preferably chosen from monomers, oligomers or polymers with an aery late, methacrylate, aery 1 amide or methacrylamide function, and monomers, oligomers or polymers capable of reacting by 2+2 or 2+4 cycloaddition, such as stilbazolium compounds.

They may advantageously be methacrylate compounds sold under the name Power Polish™ Top Coat by the company CND Shellac.

As oligomers or polymers capable of reacting by 2+2 or 2+4 cycloaddition, mention may in particular be made of polyvinyl alcohol/acetates grafted with stilbazolium functions. According to a second embodiment variant, the composition is solidifiable by interaction of the activatable compound, with at least one supplementary compound, the interaction being of covalent or non-covalent type.

In this embodiment variant, the two compounds, namely the activatable compound and the supplementary compound, can rapidly react, and produce in a few minutes, via their conversion, the desired solidification of the composition containing them.

According to a first aspect, the supplementary compound is a compound present in the atmosphere, for example water or oxygen, and the activatable compound is chosen from a siccative oil, a monomer, oligomer or polymer with a silane function, a cyanoacrylate, a reactive silicone, and mixtures thereof.

The term "siccative oit is intended to denote an oil which, when it is spread out in a thin layer and then exposed to air, is converted into a solid film-coating. In particular, the term "siccative oil" is intended to denote, in the context of the present invention, oils, and preferably triglycerides, comprising conjugated double bonds, preferably comprising at least two conjugated double bonds, and preferably comprising at least three conjugated double bonds.

The siccative oils in accordance with the invention may be of natural origin. Advantageously, the siccative oil may be chosen from siccative vegetable oils, such as linseed oil, Chinese (or Cantonese) wood oil, oiticica oil, vernonia oil, poppy oil, pomegranate oil or marigold oil, esters of these vegetable oils, alkyd resins obtained from these vegetable oils, and mixtures thereof. Alkyd resins are polyesters comprising hydrocarbon-based fatty acid chains, obtained in particular by polymerization of polyols and polyacids or the corresponding anhydride thereof, in the presence of fatty acids. These fatty acids are present, in particular in the form of triglycerides, in the majority of natural oils, such as in particular the oils mentioned previously.

The siccative oil that is suitable for implementing the present invention may be modified by chemical reaction. In particular, it may be refined and/or partially polymerized. In this respect, mention may be made of blown oils and stand oils, maleinized, epoxidized or boiled oils. The blowing of an oil is characterized in particular by polymerization of said oil with atmospheric oxygen. As cyanocrylate which is quite particularly suitable for the invention, mention may be made of 2-octyl 2-cyanoacrylate stabilized, with 1% phosphoric acid, for example Rite Lok CON895, sold by the company Chemence.

Advantageously, the activatable compound is ethyl cyanoacrylate, in particular sold under the name Superglue 3 by the company Loctite which may also be mentioned.

The reactive silicones may be chosen from moisture-sensitive reactive silicones.

Preferably, they will be the reactive silicones sold under the name Joint & Fix by the company GEB.

According to a second aspect the activatable compound and the supplementary compound have, respectively, complementary functional groups.

The term "complementary functional groups" is intended to mean groups which are capable of reacting with one another.

Thus, the activatable compound and the supplementary compound may be, respectively, a nucleophilic compound and an electrophilic compound.

As pairs of nucleophilic compound and electrophilic compound quite particularly suitable for the invention, mention may in particular be made of polyols or polyammes to be made to react with polyanhydrides or polyisocyanates.

Preferably, the nucleophilic compound and the electrophilic compound are a polyamine and a polyanhydride or two distinct reactive silicones.

By way of reactive silicones, mention may quite particularly be made of the Platsil gel 10 (A:B) reactive silicones sold by the company Polytek or else the product Dow Coming 7-FC4210 Elastomer film-forming base sold by the company Dow Corning and the product Dow Corning 7-FC4210 Curing Agent sold by the company Dow Corning.

By way of example of polyamine/polyanhydride, use may be made of diaminopropane to be mixed with Gantrez AN- 119 BF from the company Ashland.

The activatable compound and the supplementary compound may also be, respectively, a cationic polymer and an anionic polymer.

As pairs of cationic polymer and. anionic polymer quite particularly suitable for the invention, mention may in particular be made of polyacrylates or polymethacrylates or copolymer (such as UltraHold STrong from the company BASF) having acid functions which have been neutralized (aqueous ammonia, amine, strong base), to be combined with cationic polymers such as JR 400, quatemized polysaccharides (quatemized guar gum of the Jaguar C13S type from the company Rhodia, quatemized HEC), polyDADMAC such as Polyquaternium-7 from the company Nalco.

The activatable compound and the supplementary compound may also be, respectively, a carbonate or alginate compound and a calcium-based compound.

As carbonate compound, mention may in particular be made of sodium, potassium, ammonium carbonate or bicarbonate.

The alginate compounds may be chosen from Protanal PH 6160 from the company FMC Corporation.

By way of calcium-based compounds, mention may be made of calcium chloride, and other halides.

Preferably, it is a sodium alginate solution, such as that sold under the name Kelcosol by the company ISP, and an aqueous solution of calcium chloride.

Catalyst

According to one preferred embodiment, the composition also comprises a catalyst, in particular suitable for accelerating the reaction.

By way of example, in the case of the reactive silicones, the catalyst may in particular be chosen from titanium derivatives.

The cavity or cavities of the mould can be formed by bringing two jaws together, the jaws remaining closed until the composition has solidified.

Colorant

The compositions in accordance with the invention preferably comprise at least one colorant.

This (or these) colorant(s) is (or are) preferably chosen from pulverulent materials, liposoluble dyes and water-soluble dyes, and mixtures thereof.

Preferably, the compositions according to the invention comprise at least one pulverulent colorant. The pulverulent colorants may be chosen from pigments and nacres, and preferably from pigments. The pigments may be white or coloured, inorganic and/or organic, and coated or uncoated. Among the inorganic pigments, mention may be made of metal oxides, in particular titanium dioxide, optionally surface-treated, zirconium, zinc or cerium oxide, and also iron, titanium or chromium oxide, manganese violet, ultramarine blue, chromium hydrate and ferric blue. Among the organic pigments that may be mentioned are carbon black, pigments of D&C type and lakes based on cochineal carmine or on barium, strontium, calcium or aluminium.

The nacres may be chosen from white nacreous pigments such as mica coated with titanium or with bismuth oxychloride, coloured nacreous pigments such as titanium mica with iron oxides, titanium mica with in particular ferric blue or chromium oxide, titanium mica with an organic pigment of the abovementioned type, and also nacreous pigments based on bismuth oxychloride. Examples of nacres that may also be mentioned include natural mica coated with titanium oxide, with iron oxide, with natural pigment or with bismuth oxychloride.

Among the commercially available nacres that may be mentioned are the nacres Timica, Flamenco and Duochrome (on mica base) sold by the company Engelhard, the Timiron nacres sold by the company Merck, the Prestige nacres on mica base sold by the company Eckart and the Sunshine nacres on synthetic mica base sold by the company Sun Chemical.

The nacres may more particularly have a yellow, pink, red, bronze, orange, brown, gold and/or coppery colour or tint.

The liposoluble dyes are, for example, Sudan Red, D&C Red 17, D&C Green

6, β-carotene, soybean oil, Sudan Brown, D&C Yellow 1 1, D&C Violet 2, D&C Orange 5, quinoline yellow and armatto.

Preferably, the pigments contained in the compositions according to the invention are chosen from metal oxides.

A composition according to the invention may also comprise at least one particulate or non-particulate, water-soluble or water-insoluble colorant, preferably in a proportion of at least 0.01% by weight relative to the total weight of the composi tion.

For obvious reasons, this amount is liable to vary significantly with regard to the intensity of the desired colour effect and of the colour intensity afforded by the colorants under consideration, and its adjustment clearly falls within the competences of those skilled in the art.

These colorants may be present in a content ranging from 0.01% to 30% by weight relative to the total weight of the composition and in particular from 6% to 22% by weight relative to the total weight of the composition.

Preferably, the colorant(s) is (are) chosen from one or more metal oxide(s) present in a content of greater than or equal to 2% by weight relative to the total weight of the composition, and advantageously inclusively between 6% and 22% by weight relative to the total weight of the composition.

Device

As previously mentioned, a cosmetic assembly according to the invention contains, in addition to a cosmetic composition, a device comprising a mould, the mould comprising at least one cavity, and preferably several cavities, into which or each of which at least one of said fibres can be at least partially introduced, for the purposes of moulding the composition onto at least one part of said fibre(s) present in the cavity or cavities.

Mould

The moulding is carried out in situ in the mould cavity or cavities, and allows the composition to be shaped. Thus, the composition can fit the shape of the mould cavity or cavities.

The mould may comprise one or more imprints, which each at least partially define a mould cavity. Preferably, the mould is not limited to a single cavity. In particular, the mould comprises at least two cavities, preferably at least six cavities, and even more preferentially at least 10 cavities.

The mould may comprise at least two parts which each comprise one or more imprints, the imprint(s) of one of the parts being placed opposite the imprint(s) of at least one other part, so as to form the mould cavity or cavities when the parts of the mould are brought together, each of the imprints being in particular of rounded cross section, notably of circular arc, elliptical arc or parabolic cross section, in particular of semicircular cross section, The mould may comprise at least two parts, one part comprising one or more imprints, each of the imprints being in particular of rounded cross section, notably of circular arc, elliptical arc or parabolic cross section, in particular of semicircular cross section, the other part being devoid of imprint, so as to form the mould cavity or cavities when the parts of the mould are brought together. Such a mould has the advantage of not requiring a great deal of precision when placing the two parts of the mould opposite one another so as to form the cavities.

The imprint(s) may be of rounded cross section to fit the keratin fibre(s) shape.

The imprints may be parallel to one another.

The imprints may be arranged along only one part of the mould, in particular in the front of said mould, i.e. on the side where the keratin fibres are introduced.

Each imprint may have a depth of between 75 μηι and 1.5 mm.

The mould may remain motionless relative to the keratin fibres during the moulding of the fibres in its cavity or cavities.

The mould preferably does not move along the keratin fibres during the moulding of the fibres in its cavity or cavities.

The mould may or may not be disposable. In particular, the mould is disposable.

The surface finish of the mould may be smooth so as to confer on the composition once moulded a smooth external surface and a glossy appearance.

There can not be any relative speed between the keratin fibres and the cavities during the moulding, for example during a period required for the hardening or the drying of the composition, for example a period of typically 10 to 60 seconds. Mould cavity

The volume of the cavity or cavities may exceed by at least a factor of 2, better still a factor of 10 to 100, the volume of the part of the keratin fibres filling it or them.

The volume of each, cavity may range between 0.08 and. 220 mm³.

The cavity or cavities may each have a circular, semicircular, oval or polygonal cross section, which may or may not be constant when moving along the cavity.

The cavity or cavities may each be approximately cylindrical in shape. The cavity or cavities may each have a decreasing cross section so as to give the fibre(s), once moulded by the composition, a tapered appearance and to facilitate, where appropriate, the demoulding of the fibres by pulling them away.

The cavity or cavities may each have an approximately cylindrical shape on one part of their length and an enlarged, in particular spherical, shape on another part of their length, in particular with a view to moulding a head, for example in the shape of a portion of a sphere, on at least one part of the keratin fibre(s).

The cavity or cavities may each, have a length of between 5 and 30 mm and a width, in particular a diameter, of between 150 μηι and 3 mm. In the case of a length of 30 mm and a diameter of 3 mm, the volume may be increased by a factor of 50.

Each cavity may have an elongated shape with a curvilinear longitudinal axis which approximately reproduces or which increases the curvature of the keratin fibre(s) introduced, in particular the eyelashes. Thus, the moulding enables to increase keratin fibres visibility while underlining their curvature.

The radius of curvature of the cavity or cavities may be higher than 15 mm. In particular, it can range between 15 and 25 mm.

Each cavity may, on the contrary, have an elongated shape which does not reproduce the curvature of the keratin fibre(s) introduced, having in particular a rectilinear or broken-line longitudinal axis. The cavity or cavities may extend in all directions, in particular transversely to the eyelashes. The cavity or cavities may form patterns of any types, such as waves or grids.

Each cavity may have an elongated shape, with a curvilinear or rectilinear longitudinal axis, and the cavities may have non-parallel respective longitudinal axes.

When the cavity or cavities have an elongated shape, the keratin fibres are preferably introduced into the cavity or cavities along their longitudinal axes.

Although cavities of elongated shape make it possible to perform a more conventional cosmetic treatment of keratin fibres, new effects can be obtained with cavities of non-elongated shape. For example, the cavity or cavities may each have an approximately spherical or polyhedral shape, in particular spherical shape, having a diameter of between 0.4 mm. and 5 mm, so as to form balls at the end of the keratin fibres, for example. Each cavity is preferably closed laterally, so that the composition does not escape laterally during the moulding.

Each cavity may have an elongated shape and be closed at least one of its longitudinal ends.

Each cavity may constitute a space which is substantially entirely closed, notably entirely closed, in the absence of keratin fibre. In this case, one part of each keratin fibre at least partially introduced into a cavity may be gripped between the two parts of the mould that are brought together, while another part of the keratin fibre extends into the cavity. The cavity may be closed on the side where the keratin fibre(s) is (are) introduced, via a flexible wall, which can defonn, preferably elastically, so as to allow the keratin fibre(s) to pass into the cavity.

As a variant, each cavity may constitute a semi-open space, in the absence of keratin fibre. In particular, each cavity can delimit a space which is closed with the exception of one end via which the keratin fibre(s) which is (are) at least partially introduced into the cavity communicate(s) with the exterior. Thus, each cavity may open to the exterior, on the side where the keratin fibre(s) is (are) introduced, via an opening through which the keratin fibre(s) is (are) introduced.

The free end of the keratin fibre(s) introduced into the cavity or cavities preferably do not exceed the cavity or cavities.

At least two of the cavities may be not connected. All of the cavities may be not connected.

The cavities may or may not be parallel to one another.

The cavities may be placed at regular intervals, for example according to a step of 1 to 2 mm, centre to centre.

The number of cavities may be greater than or equal to one, in particular greater than or equal to two, preferably greater than or equal to six and more preferably greater than or equal to ten.

Jaws

The cavity or cavities may be formed by bringing two jaws together, in particular according to a translational and/or rotational movement of one of the jaws with respect to the other. The two jaws can be moved apart at the moment the keratin fibres are introduced and closed again so as to form the cavities into which the keratin fibres are introduced.

The jaws may carry or integrate the mould.

The jaws may be curved, in particular about a geometric axis perpendicular to the longitudinal axis of the mould cavities.

A system where one or both of the jaws sHde(s) on columns can be used to move the two jaws apart at the moment the keratin fibres are introduced and to close them again so as to form the cavities.

Use may also be made of a system where the jaws are connected by a hinge.

Use may also be made of a system where the jaws are not connected, and are optionally associated with one another by a guide system.

The two jaws preferably fit together sufficiently well for the composition present in the cavities not to escape.

The jaws may comprise an elastomer material, for example in order to absorb a deformation of the mould.

Mould deformation

It may be advantageous to deform the mould with the keratin fibres in place in order to reduce the volume of the cavities, and for example to force the composition to be distributed around the fibres introduced into the cavities.

The mould may comprise a flexible, in particular elastomeric, material.

An extensible, in particular elastomeric, mould makes it possible to compress the composition in order to avoid problems of dead volume and/or to force better integration of the fibres into the composition. The mould may be entirely made of flexible, in particular elastomeric, material.

The mould may comprise flexible parts and non-flexible parts. The mould may in particular be surface-covered with flexible, in particular elastomeric, material, for example over a thickness ranging from 0.5 to 2 mm.

The deformation of the mould may be carried out by compression, for example mechanical compression with fingers, or be pneumatic or hydraulic, or by suction. For example, by pulling a trigger, an overpressure can be created between one jaw and the mould, which has the effect of compressing the two parts of the mould on to one another and preventing dead zones.

Demoulding

The composition can be demoulded, and extracted from the mould, preferably without losing its cohesion around the keratin fibres and while retaining the surface finish conferred by the mould.

Demoulding of the composition without deterioration is desired.

The mould may be extensible, in particular elastomeric, in order to facilitate demoulding.

The mould cavity or cavities may have a non-stick coating or may have undergone a treatment aimed at conferring non-stick properties. Thus, the mould may comprise at the surface a low-adhesion material, in particular of silicone or PTFE type. A layer of a non-stick product, in particular an oil, a silicone, a PTFE powder or boron nitride, may also be applied to the mould cavity.

The device may comprise an automatic or non-automatic demoulding system in order to act on the mould and/or the composition contained in the cavity or cavities in order to facilitate the separation of the composition-coated fibres from the mould. This demoulding system may comprise a set of small blades or other reliefs which deform the mould by being compressed against said mould. The deformation of the mould can take place at the level of the cavities, thereby facilitating the ejection of the moulded material.

Bridges of composition may connect several cavities to one another after moulding, in an unwanted manner. The device may comprise blades or other reliefs which are used to cut bridges of composition between at least two cavities after moulding. These blades or other reliefs may act by fitting over the bridges between the cavities. These blades may be added to the mould.

The blades or other reliefs which are used to cut the bridges of composition may be carried by one of the jaws. In this case, the other jaw may have a planar surface from the viewpoint of the blade or other relief or a groove into which the blade or other relief fits. The blades or other reliefs may further be placed on the two jaws, in such a way that one blade or other relief of one of the jaws fits over one blade or other relief of the other jaw. The demoulding of the moulded composition is preferably carried out mechanically, in particular by deformation of the mould, by moving the two jaws away from one another and/or by pulling the keratin fibres out of the mould.

The demoulding of the composition may be carried out, where appropriate, by pulling at one end of one part of the mould in order to separate it from the other part, in the way in which two sheets adhering to one another are separated by peeling. The demoulding of the moulded composition may further, according to one variant, be at least partly carried out physicochemically, in particular by at least partially dissolving, with a solvent, the mould or a film-coating present inside the mould, between said mould and the composition moulded onto the keratin fibres.

Provision of the composition

At least one part of the composition, in particular the entire composition, may be deposited on at least one of said fibres, better still on each of said fibres, before they are introduced into the mould. In this case, the closing of the mould can distribute the composition in the cavities and, where appropriate, drive the excess composition out of the mould.

At least one part of the cosmetic composition, in particular the entire cosmetic composition, may be initially present in the mould before introduction of the fibre(s) into the mould. This can facilitate the metering of the composition introduced into the mould cavity or cavities. The composition may be contained with the mould in sealed packaging.

At least one part of the composition, in particular the entire composition, may be injected into the mould, via at least one injection channel.

The mould may comprise imprints in which at least one part of the composition, in particular the entire composition, is present before introduction of the keratin fibre(s) into the mould. The imprints define the mould cavities when said mould is closed.

The mould may comprise at least two parts each comprising imprints, at least one part of the composition, in particular the entire composition, being present in at least one part^', in particular in all the parts, of the mould, before introduction of the keratin fibre(s) into the mould. The composition for example entirely fills the imprints and is present only in the imprints, before closing of the mould. The mould may also be prefilled with an excess of the composition so that the material stands higher than the cavity, for example by being slightly curved. In this way, any absence of product around the eyelash is avoided and the formation of a perfect cast is ensured.

Automatism

The device may be automated. A single triggering may make it possible to perform a series of operations, for example filling the cavities with the moulding composition, and an action exerted on the mould so as to deform it in order to perform demoulding. The closing of the mould may also be automatic.

Device

The device may comprise a system providing energy, in particular in the form of light or heat.

The device may comprise at least one heating element which serves to increase the temperature of the cosmetic composition, the increase in the temperature inducing an increase in the reactivity of the composition.

During the temperature increase, the composition may be present in the mould or outside the mould. The composition may be present outside the mould during the increase in its temperature and may be injected into the mould, in particular via at least one injection channel.

The heating may be automatically triggered upon closure of the mould. As a variant, the heating may be triggered before closure of the mould and a visual and/or sound indicator may signal to the user that the desired temperature for closing the mould and/or putting the fibres in place has been reached.

The device may comprise at least one system for admitting material, which serves to introduce a part or all of the cosmetic composition into the mould cavity or cavities, and in particular comprises one or more injection channels communicating with one or more mould cavities. The composition is, for example, contained in a reservoir, and a piston or a pump makes it possible to force it to flow into the mould cavity or cavities.

The device may comprise a light element, in particular IR, UV or visible light element, or microwave element, which serves for example to trigger the crosslinking of the composition, in particular by absorption of the light or microwave radiation by the cosmetic composition.

The jaws may be closed manually.

The device may be in the form of a clamp comprising at least one housing into which at least one of the fingers of one hand, for example the thumb or the index finger, can be introduced so as to move the two jaws apart, in order to make it possible to introduce the keratin fibres and to close them on said fibres.

The device may be in the form of a clamp comprising two housings into which two of the fingers of one hand, for example the thumb and the index finger, can be introduced so as to move the two jaws apart, in order to make it possible to introduce the keratin fibres and to close them on said fibres. Each of these housings may be removable or non-removable. It may or may not be possible for each of these housings to be oriented rotationally.

The device may comprise a chamber for mixing the reagents upstream of the mould cavity or cavities.

Cosmetic treatment process

As previously mentioned, according to another of its aspects, the present invention also relates to a process for cosmetic treatment of one or more keratin fibres, in particular of one or more eyelashes or eyebrows, comprising at least the step consisting in moulding a fluid cosmetic composition, containing at least one compound which is activatable by means of a physical or chemical stimulus, said composition being solidifiable via the conversion of the activated form of said compound into a solid material, by self-reaction and/or interaction with at least one supplementary compound, onto at least one part of said fibres, by means of one or more cavities (5), of a mould (2), into which said fibres are at least partially introduced.

In particular, said fibres are, optionally individually, at least partially introduced into said cavities.

The composition may be deposited on at least three quarters of the length of at least one of said fibres, better still on at least three quarters of the length of each of said fibres. The length of a fibre is measured from the surface of the skin up to its free end when the fibre is placed fiat.

The composition may be deposited on just one part of the length of at least one of said fibres, better still on just one part of the length of each of said fibres.

Preferably, the cosmetic composition is introduced in the liquid state into the mould so as to subsequently solidify therein, in particular by self-reaction or interaction with at least one supplementary compound.

According to one particular embodiment, the cosmetic composition is moulded onto at least one part of at least one of said human keratin fibres and of at least one additional fibre, the cosmetic composition ensuring the attachment of the additional fibre(s) to the human keratin fibre(s), in particular with the additional fibre(s) dedicated to extending the human keratin fibre(s), with or without axial overlap between the two types of fibres Keratin fibres

The keratin fibres to which the treatment according to the invention applies are preferably human, in particular eyelashes or eyebrows, more preferably eyelashes.

The keratin fibres may be hair. It is thus possible to treat the hair, in particular on a part of the length thereof, for instance the roots, in order to increase the rigidity thereof, and/or the ends in order to improve the appearance thereof.

It is possible to post-treat the keratin fibres, moulded according to the invention, with other products, for example mascara, or by contact with a hot surface.

Each of said fibres may be at least partially introduced into a respective cavity. At least two of said fibres may be at least partially introduced into the same cavity. At least one cavity may contain just one fibre.

Additional fibres

The assembly and the process according to the invention also make it possible to attach additional fibres to existing keratin fibres via the composition while limiting the visibility of the connection, thereby making it possible to give the keratin fibres a longer and/or thicker appearance. Thus, the composition may be moulded onto at least one part of at least one of said keratin fibres and of at least one additional fibre. Thus, the device may comprise one or more additional fibres ensuring the attachment of the additional fibre(s) to the human keratin fibre(s), in particular with the additional fibre(s) dedicated to extending the human keratin fibre(s), with or without axial overlap between the two types of fibres

The composition may be deposited on just one part of the length of at least one of the keratin fibres and on just one part of the length of at least one additional fibre, better still on just one part of the length of each of the keratin fibres and on just one part of the length of each of the additional fibres.

The additional fibres may be covered with the composition only at their ends directed towards the keratin fibres, preferably over a length of less than 10 mm, and preferably less than 5 mm.

The device may comprise one or more of said additional fibres, prepositioned in the mould cavity or cavities or interlinked with a support which makes it possible to preposition them. This support may be removable or resorbable, for example by washing with water.

The additional fibres may be synthetic fibres of the same colour as the keratin fibres of the user, and in particular may be darker in colour than the eyelashes of the user and in particular black. Typically, the fibres are 50 to 200 μιη in diameter, and between 5 and 25 mm in length, and can be tapered in order to resemble natural eyelashes.

At least one part of the composition, in particular the entire composition, may be deposited on the additional fibre(s) before they are introduced into the mould.

At least one part of the composition, in particular the entire composition, may be deposited on the additional fibre(s) while said fibres are present in the mould.

At the least one part of the composition, in particular the entire composition, may be initially present in the mould before introduction of the additional fibres into the mould.

Heat then makes it possible to attach the additional fibres to the keratin fibres.

The device may comprise two jaws, at least one of the jaws comprising a heating element. The device may comprise a light source and two jaws, at least one of the two jaws being transparent to at least a part of the radiation emitted by the light source, such that said radiation reaches the composition.

The keratin fibres may be cut prior to their introduction into the mould, in particular in order to give them a length which will make them fit to the arrangement of the additional fibres in the mould.

Other features, advantages and methods of application of the assembly and of the process according to the invention will emerge more clearly from the exemplary embodiments of the invention and from the examination of the appended figures, presented by way of non-limiting illustration of the field of the invention and in which:

- Figures 1A and IB represent an example of an assembly according to the invention, respectively with the jaws of the mould closed in moulding configuration and open;

- Figure 2 represents in isolation one of the parts of the mould of figures ΪΑ and IB;

- Figure 3 represents, in section along III of Figure 2, a part of the mould of this figure;

- Figures 4A and 4B represent another example of an assembly according to the invention, in the form of a clamp, respectively with the jaws of the mould closed in moulding configuration and open;

- Figures 5A and 5B, 7A and 7B, 9 and 10 represent other examples of devices according to the invention in the form of a clamp, the moulds not being represented, Figures 5 A and 5B illustrating the same example of a device respectively with the jaws of the mould closed and open. Figures 7A and 7B illustrating the same example of a device respectively with the jaws of the mould closed and open;

- Figure 6A and 6B represent two examples of a mould before closing;

- Figure 8 represents the device from Figure 7 A, the housings having been dismantled;

- Figures 1 1AB and 1 IB represent various steps for using an example of a demoulding system;

- Figure 12 represents another example of a mould before closing; - Figure 13 represents an example of a part of a device equipped with blades;

- Figures 14A and 14B represent two examples of connection of an additional fibre to an eyelash using a composition according to the invention;

- Figures 15A and 15B illustrate an example of attachment of additional fibres to eyelashes;

- Figures 16 A to 16D represent, in section, examples of mould cavity shape;

- Figures 17A and 17B represent respectively a cavity comprising an eyelash and a cavity comprising several eyelashes;

- Figures 18A to 18E represent, in section, examples of arrangements of the composition according to the invention before moulding, within a mould cavity into which an eyelash is introduced;

- Figure 19 represents an example of an injection channel communicating with mould cavities;

- Figures 20A and 20B represent, very diagrammatical ly, respectively a device according to the invention comprising a heating element and a device according to the invention placed in proximity to a heating element; and

- Figures 21 A and 21 B represent, very diagrammatically, respectively a device according to the invention comprising a light element and a device according to the invention placed in proximity to a light element.

Figures 1A and IB represent an example of an assembly according to the invention comprising a device (1) and a cosmetic composition (6) for cosmetic treatment of eyelashes.

The device (1) comprises a mould (2) which has two parts (2a) and (2b). The mould (2) preferably comprises an elastomeric material. The two parts (2a) and (2b) of the mould (2) each have a thickness e of approximately 2 mm for example.

The two parts (2a) and (2b) of the mould (2) comprise imprints (4), in the form of grooves of elongated shape. Each part (2a, 2b) comprises, for example, as illustrated, 17 imprints (4), for example of width 1 of approximately 0.5 mm, of length L of approximately 2.5 cm and of approximately semicircular cross section. The imprints (4) of each part (2a, 2b) of the mould (2) are preferably substantially parallel to one another. The imprints are also, preferably as illustrated, evenly spaced out, according to a step p of 1.5 mm, centre to centre. The device (1) comprises two jaws (3a) and (3b) which carry respectively the mould parts (2 a) and (2b).

The two parts of the mould (2) and the jaws (3a) and (3b) may have additional reliefs, so as to be able to accurately place the two parts (2a, 2b) of the mould (2) on each jaw (3a. 3b).

The lower jaw (3b) comprises, in the example under consideration, a temperature-controlled heating element (30).

The lower jaw (3b) is fixed, whereas the upper jaw (3a) slides vertically by means of a guidance system (80).

When the jaws (3a) and (3b) are closed against one another, as represented in

Figure 1 A, cavities (5) are formed by virtue of the imprints (4), which are superimposed in pairs

In the example under consideration, 17 cavities of elongated shape, having a width 1 of approximately 0.5 mm, a length L of approximately 2.5 cm and an approximately circular cross section, which are substantially parallel to one another and evenly spaced out, according to a step p of 1.5 mm, centre to centre, are thus created.

The cavities (5) are closed on the sides and open out to the exterior, on the side where the eyelashes are introduced, via a front opening through which the eyelashes are introduced. The cavities are closed at their rear end.

To use the device (1), the cosmetic composition (6) is, for example, placed in imprints (4) of the part (2b) of the mould (2), mounted on the lower jaw, before introduction of the eyelashes. The composition (6) is a composition as previously described.

The eyelashes are introduced into the imprints (4) of the mould (2) of the device ( 1) in its open form (Figure IB), then the jaws (3a, 3b) are closed so as to hold the eyelashes in the cavities (5).

The heating element (30) brings the composition (6) to a temperature at which it solidifies by self-reaction and/or interaction with at least one supplementary compound and it takes the shape of the imprints (4). The moulding of the composition onto the eyelashes is earned out in situ in the cavities (5) of the mould (2).

Then, the heating element (30) stops heating the composition and said composition is left to cool. The jaws (3a, 3b) are opened and the eyelashes are withdrawn when the temperature of the composition (6) has come back down. The device (1) can be produced such that the closing of the jaws (3a) and (3b) automatically triggers the heating of the composition (6), and so that the heating is automatically stopped when the desired temperature is reached.

The opening of the jaws (3a) and (3b) can take place automatically, as appropriate. As a variant, a sound or light signal can indicate that the jaws can be opened.

Figures 2 and 3 represent more particularly the part (2b) of the mould (2) of Figures 1 A and IB.

It is seen that the part (2b) can be curved along the longitudinal direction M of the imprints (4), in order to reproduce the curved shape of the eyelashes, the radius of curvature preferably being between 15 and 25 mm.

The edge of the part (2b) intended to come into contact with the eyelid may have a rounded shape, concave towards the exterior, with a radius of curvature of preferably between 15 and 25 mm.

The device (1) may, according to one implementation variant of the invention, be in the form of a clamp, as represented in Figures 4 A and 4B.

Like the device represented in Figures 1A and IB, this device in the form of a clamp comprises a mould (2) in two parts (2a) and (2b). The mould (2) preferably comprises an elastomeric material. The two parts (2a) and (2b) of the mould (2) each have, for example, a thickness e of approximately 2 mm. The two parts (2a) and (2b) of the mould (2) comprise imprints (4), in the form of grooves of elongated shape. The device (1 ) comprises two jaws (3a) and (3b) which carry respectively the mould parts (2a) and (2b).

Each part (2a, 2b) comprises, for example, 15 imprints (4), for example having a width 1 of approximately 0.5 mm, a length L of approximately 2.5 cm, and a decreasing semicircular cross section so as to give the eyelashes, once moulded with the composition (6), a tapered appearance. The imprints (4) of each part (2a, 2b) of the mould (2) are preferably, as illustrated, substantially parallel to one another. The imprints are evenly spaced out, according to a step p of 1.5 mm, centre to centre.

The mould (2a, 2b) may have a radius of curvature along the direction M of

Figure 4B of between 15 and 25 mm in order to follow the shape of the eyelashes. The edge of the part (2b) intended to come into contact with the eyelid may have a rounded shape, concave towards the exterior, with a radius of curvature of preferably between 15 and 25 mm.

The edge of the jaws (3a, 3b) and of the mould (2a, 2b) intended, to come into contact with the eyelid may have a rounded shape, concave towards the exterior, in particular circular, the edge of the eyelid describing, to a first approximation, an arc of a circle.

When the jaws are closed against one another, as represented in Figure 4A, cavities (5) are formed by virtue of the imprints (4), which are superimposed in pairs. Fifteen cavities (5) of elongated shape, having a width 1 of approximately 0.5 mm, a length L of approximately 2.5 cm and a circular cross section of decreasing diameter as the distance from the opening for introducing the eyelashes increases, which are substantially parallel to one another and evenly spaced out, according to a step p of 1.5 mm, centre to centre, are thus, for example, created. The cavities (5) are closed on the sides and open out to the exterior, on the front side where the eyelashes are introduced, via a circular opening through which the eyelashes are introduced. The cavities are closed at their rear end.

The device (1) in the form of a clamp may comprise, as illustrated, two housings (20a, 20b) into which fingers of one hand, for example the thumb and the index finger, can be introduced so as to move the two jaws (3a, 3b) apart, in order to make it possible to introduce the eyelashes between them and to close them on said eyelashes.

The cosmetic composition (6) to be moulded is placed in imprints (4) of the part (2b) of the mould (2) before introduction of the eyelashes. The composition (6) is a composition as previously described.

An independent oven, not represented, can be used to bring the composition to the desired temperature, before introduction of the eyelashes into the imprints (4) of the mould. The housings (20a, 20b) preferably remain cold, the heating preferably taking place by radiative transfer on the faces of the mould having the imprints.

The cavity of the oven may have a parallelepipedal shape, for example an approximately 10 cm-sided parallelepipedal shape. In addition to its heating function, the oven can also make it possible to present the jaws in such a way that the user can seize them directly between the thumb and index finger, in a single action, in particular, it is possible to use portable clamps of which the internal faces are placed in front of the heat sources and the external faces bear grasping rings adjusted to the shape of the fingers. The surfaces carrying the composition can, for example, be heated in the range 50°C-80°C. The oven can be powered by a low-voltage power source.

The heating temperature can be adjustable by the user. A casing can enable a set temperature to be displayed. The heating power can be about 5 W for example.

When the composition is at the desired temperature, the user's thumb and index finger are introduced into the housings (20a and 20b), then the device (! ) is brought into proximity to the eyelashes and the latter are introduced into the imprints (4) of the mould (2) of the device (1) in its open form (Figure 4B), then the jaws (3a, 3b) are closed so as to hold the eyelashes in the cavities (5).

The moulding is carried out in situ in the cavity or cavities (5) of the mould (2).

Next, the jaws (3a, 3b) are opened and the eyelashes are withdrawn when the temperature of the composition (6) has come back down.

The device (1) in the form of a clamp may be devoid of a system for guiding the movement of one jaw relative to the other, as represented in Figures 5A and 5B. This device has two housings (20a, 20b) for the fingers, like the example previously described.

Only one of the parts can have imprints, which is particularly advantageous for a device (1) devoid of a guidance system, since the bringing together of the two parts of the mould does not need to be carried out very accurately.

By way of example, represented in Figure 6 A is a device (1) in which the part (2a) of the mould (2) may be smooth and the part (2b) may comprise semicircular imprints (4).

Moreover, each cavity (5) may have an elongated shape which does not reproduce the curvature of the eyelash(es) introduced, it being possible in particular for the cavity to be non-curved along its longitudinal direction, having, for example, a rectilinear longitudinal axis.

The device (1) in the form of a clamp may comprise a guidance system, for example in the form of reliefs having complementary shapes, which brings the jaws (3a, 3b) into position so that the two parts of the mould (2a, 2b) accurately correspond to one another. The device (1) in the form of a clamp may thus comprise, for example, a male and female cone guidance system.

The device (1) in the form of a clamp may comprise a guidance system of film hinge type or other form of articulation (40), as represented in Figures 7A and 7B, such that the jaws can be moved together by a pivoting movement with respect to one another. Each cavity formed by the superimposition of two imprints may have a rectilinear longitudinal axis. The front edges of the jaws (3a, 3b) intended to come into contact with the eyelid may have a circular shape, as illustrated.

During the use of the device (1), the angle a made by the plane of moulding with the horizontal may be zero or non-zero, in particular between 20° and 40°, as illustrated in Figure 8. inclining the plane of the moulds makes it possible to fix the curvature of the edge coming into contact with the eyelid as close as possible to the curvature of the eyelid itself.

The hinge (40) may comprise one or more springs (50) as represented in Figure

9, which assist the opening movement for example.

The device (1) in the form of a clamp may comprise a single housing (20a) for receiving a finger, as illustrated in Figure 10, or two housings, as previously described.

It may be possible for the housing(s) (20a, 20b) to be oriented rotationally, which enables an adjustment according to the angle between the user's thumb and index finger. They may be positionable, where appropriate, at various points (60a), (60b) or (60c), depending on the desired distance between the fingers and the face of the user, as illustrated in Figure 8.

The mould (2a, 2b) may be integrated into the jaws (3a, 3b). The device (1) in the form of a clamp may then be made of a flexible material of silicone type for example, in order to facilitate demoulding.

The mould may also be made of a flexible material of silicone type with the inclusion of a rigid frame. The housing(s) (20a, 20b) may be made of a rigid material, in order to improve the holding of the clamps in place and the overall shape of the mould, while facilitating demoulding.

It is possible for the mould (2a, 2b) not to be integrated into the jaws (3a, 3b), the jaws carrying the mould, which is then added to the jaws. The mould may be flexible and held on the jaws for example by adherence or by matching shapes, for example by click-fastening and/or sliding attachment. The jaws are then preferably rigid.

The mould (2a, 2b) may or may not be disposable. The jaws (3a, 3b) may or may not be reusable. The composition (6) may be present within the mould before use of the device (1), in the part (2a), the part (2b) or in both parts. The loading of the mould with composition may be carried out prior to the use of the device, for example using a metering device.

The device in the form of a clamp has the advantage of being light, of allowing the user to precisely perceive the stresses applied, to the eyelid, during the operations, of creating a very small visual eclipse allowing optimal vision for the user, and of being easy to use.

The device (1), whether or not it is in the form of a clamp, may comprise a system which facilitates demoulding, for instance a set of small blades (10) which deform the mould, for example when moved relative to said mould in the direction of the imprints (4), as illustrated in Figures 11 A and 1 IB,

The mould (2) may also comprise, as illustrated in Figure 12, reliefs (9) between two imprints (4) intended to form two cavities, so as to cut any bridges of composition.

The device (1) may comprise blades (1 1) which serve to cut any bridges of composition between two cavities, as illustrated in Figure 13.

The blades (1 1) are, for example, retracted within the part of the mould (2a) before closing thereof, and tend to advance upon closing of the mould. The blades (1 1) are, for example, interlinked with a support (1 11) which is mobile relative to the part (2a).

As a variant, the material of the part (2a) is elastomeric and overmoulded on the blades ( 1), which can push on the bridges of composition extending between the imprints (4) by virtue of the deformability of the material with which the part (2a) is made.

Other systems can be further used for cutting the bridges, for example a system which makes it possible to send compressed air via slits located between the imprints or a heating element.

The composition (6) can make it possible to attach an additional fibre (12) to an eyelash (7), with or without axial overlap between the eyelash and the additional fibre, as illustrated respectively in Figures 14A and 14B. The eyelash may be on the additional fibre if the additional fibre is in a cavity of the lower mould part, or vice versa, if the additional fibres are in cavities of the upper mould part, in practice, the additional fibres may also be next to the eyelashes depending on the organization caused by the pressure of the two parts of the mould.

The additional fibres may in particular be false eyelashes.

The additional fibres (12) may be placed on hold in the imprints (4) of the mould (2) (Figure 15 A). The composition (6) may then be applied to the ends of the additional fibres (12) and the eyelashes (7) introduced into the imprints (4) of the mould (2) and brought into contact with the composition (6) (Figure 15B).

The cavities (5) may, according to various variants, have a shape which is approximately cylindrical (Figures 16A and 6B), approximately spherical (Figure 16D), cylindrical on a part of their length (L) and spherical on the other part of their length (Figure 16C), or have a decreasing cross section so as to give the eyelash(es), once moulded by the composition, a tapered appearance (Figure 16B).

They may also have a semi-cylindrical shape in the case where the part (2a) of the mould is flat and the part (2b) of the mould is semi-cylindrical in the cavity (5) formation zone (Figure 6A).

The depth (j) of the imprints 4 may range between 75 μπι and 1.5 mm.

Each cavity (5) can receive one or more eyelashes (7), as illustrated respectively in Figures 17A and 17B.

Before moulding, the composition (6) may, according to various variants, be present on only one part of the cavity (5), as represented in Figures 18A to 18C, on all of the cavity, as illustrated in Figure 18E, or absent from the cavity as represented in Figure 18D. In the latter case, the composition may be injected via an injection channel (8) communicating with the cavities (5) of the mould, as illustrated in Figure 19.

The composition (6) may be present initially, before putting the eyelashes in place, on the upper part of the cavity, corresponding to the part (2a) of the mould (Figure 18A), on the lower part of the cavity, corresponding to the part (2b) of the mould (Figure 18B), or both on the upper part and on the lower part of the cavity, corresponding to both parts (2a) and (2b) of the mould (Figures 18C and 18E).

The device (1) may comprise, or be placed in proximity to, a heating element (30), as illustrated very diagrammatical ly respectively in Figures 20A and 20B, the heating element (30) being, for example, a resistive element, a radiative element or a wave dispenser. The device may provide for the injection of the composition, in particular by an injection channel (8), as represented in Figure 19.

The device (1) according to the invention may comprise a triggering system, such as a light element (32), as represented respectively in Figures 21A and 21B, for example an IR, UV or visible light illuminator. The mould (2) is then preferably transparent.

EXAMPLES

Example 1: Assembly containing a composition based on mcthacrvlate compounds

1) Cosmetic composition

A composition in accordance with the invention is prepared. The formula is made up of 100% by weight of methacrylate compounds sold under the name Power Polish™ Top Coat by the company CND Shellac. The composition is handled while taking care to avoid contact with daylight.

2) Device

The device used in Example 1 is as described in Figures 1A and IB.

The two parts (2a) and (2b) of the mould, placed between two mobile jaws (3a) and (3b), are made of UV -transparent silicone elastomer (Platsil gel 10 (A:B) reactive silicones sold by the company Polytek). They each comprise 20 grooves approximately 0.5 mm in diameter over a length of 2.5cm.

The two jaws comprise two lugs and the two parts of the mould each comprise two housings which fit the lugs.

When the two parts of the mould are brought together, 20 ieaktight cavities, closed at their end, are created on the sides.

3) Cosmetic assembly

The cosmetic composition based on methacrylate compounds is placed in the grooves of the lower part (2b) of the mould. The upper part (2a) of the mould is then put in place.

The two parts (2a) and (2b) of the mould are then placed on the jaws (3a) and (3b) of the device (1). The two jaws (3a) and (3b) are moved near to the eyelash fringe and then closed so as to trap it.

The assembly is placed in proximity to a UV A source (UV lamp used for UV gels producing 36W).

After exposure for 4 minutes, the two jaws are opened and the sculptures are released.

A homogeneous makeup result is obtained on the eyelashes, without eyelash brushing movement. The makeup is easy to apply without the need to calibrate the amount of composition taken and applied.

Example 2: Assembly containing a reactive composition based on ethyl cyanoacrvlatc

1 ) Cosmetic composition

A composition in accordance with the invention is prepared. The formula consists of 1.00% by weight of ethyl cyanoacrylate sold under the name Superglue 3 by the company Loctite. The composition is handled by taking care to avoid contact with water.

2) Device

The device used is identical to that of Example 1.

3) Cosmetic assembly

The cosmetic composition based on ethyl cyanoacrylate is placed in the grooves of the lower part (2b) of the mould. The upper part (2a) of the mould is moistened by spraying so as to deposit thereon 0.3 g of water, and then put in place.

The two parts (2a) and (2b) of the mould are then placed on the jaws (3a) and (3b) of the device (1).

The two jaws (3a) and (3b) are moved near to the eyelash fringe and then closed so as to trap it.

After a 4-minute wait the two jaws are opened and the sculptures are released. A homogeneous makeup result is obtained on the eyelashes, without eyelash brushing movement. The makeup is easy to apply without the need to calibrate the amount of composition taken and applied. Example 3: Assembly containing a composition based on reactive silicone

1 ) Cosmetic composition

A composition according to the invention is prepared. The formula consists of 100% by weight of reactive silicone sold under the name Joint & Fix by the company GEB. The composition is handled while talcing care to avoid contact with water.

2) Device

The devi ce used is identical to that of Example 1.

3) Cosmetic assembly

The cosmetic composition based on reactive silicone is placed in the grooves of the lower part (2b) of the mould. The upper part (2a) of the mould is moistened by spraying so as to deposit thereon 0.1 g of water, and then put in place.

After a 12 -minute wait, the two jaws are opened and the sculptures are released.

Example 4: Assembly containing a composition based on reactive silicones

1 ) Cosmetic composition

A composition in accordance with the invention is prepared. The formula consists of two Platsil gel 10 (A:B) reactive silicone components sold by the company Polytek.

The two compounds are mixed and the mixture is introduced into the mould without delay, less than 3 minutes after preparing the mixture.

2) Device

The device used is identical to that of Example 1. 3) Cosmetic assembly

The cosmetic composition based on reactive silicones is placed, immediately after it has been prepared, in the grooves of the lower part (2b) of the mould. The upper part (2a) of the mould is then put in place.

After a 7-minute wait, the two jaws are opened, and the sculptures are released.

Example 5: Assembly containing a composition based on reactive silicones

1) Cosmetic composition

A composition in ac cordance with the invention is prepared. The formula consists of two Platsil gel 10 (A:B) reactive silicone components sold by the company Polytek. The mixing of the components is carried out in situ in the device.

2) Device

The device used is identical to that of Example 1.

3) Cosmetic assembly

Component A is placed in the grooves of the lower part (2b) of the mould. As for compound B. it is placed in the upper part. (2a) of the mould.

The two parts (2a) and (2b) of the mould are then placed, on the jaws (3a) and (3b) of the device (1).

After a 7-minute wait, the two jaws are opened and the sculptures are released.

A homogeneous makeup result is obtained on the eyelashes, without eyelash brushing movement. The makeup is easy to apply without the need to calibrate the amount of composition taken and applied. Example 6: Assembly containing a composition of sodium alginate and calcium chloride

1) Cosmetic composition

A composition according to the invention is prepared as described hereinafter. The formula consists, firstly, of a solution of sodium alginate (sold under the name Kelcosol by the company ISP) at 5% and, secondly, of an aqueous solution of calcium chloride at 3%, of pH = 7, gelled by means of a non-ionic hydroxy ethylcellulose thickener at 2%. The compositions are prepared by dissolving the compounds in water.

The mixing of the components is carried , out in situ in the device.

2) Device

The device used is identical to that of Example 1.

3) Cosmetic assembly

The sodium alginate-based solution is placed in the grooves of the lower part (2b) of the mould. As for the gel solution based on calcium chloride, it is placed, in an amount equivalent to the amount of alginate solution, in the upper part (2a) of the mould.

The two parts (2a) and (2b) of the mould are then placed on the jaws (3 a) and (3b) of the device (1).

After a 3 -minute wait, the two jaws are opened and the sculptures are released.

Claims

1. Cosmetic assembly, of use for the treatment of keratin fibres, in particular the eyelashes and the eyebrows, comprising:

2. Assembly according to Claim 1, characterized in that the physical or chemical stimulus is a variation in light, for example UV or visible light, in pH, in temperature or in degree of humidity, or else the bringing into contact with at least one reagent which may or may not be different from the supplementary compound.

3. Assembly according to any one of the preceding claims, characterized in that the composition is solidifiable by self-reaction of the activatable compound.

4. Assembly according to any one of the preceding claims, characterized in that the activatable compound is chosen from monomers, oligomers or polymers with an acrylate, methacrylate, acryiamide or methacrylamide function, and monomers, oligomers or polymers capable of reacting by 2+2 or 2+4 cycloaddition, such as stilbazolium compounds.

5. Assembly according to any one of the preceding claims, characterized in that the activatable compound is a photosensitive compound.

6. Assembly according to Claim 1 or 2, characterized in that the composition is solidifiable by interaction of the activatable compound with at least one supplementary compound, the interaction being of covalent or non-covalent type.

7. Assembly according to Claim 6, characterized in that the supplementary compound is a compound present in the atmosphere, for example water or oxygen, and the activatable compound is chosen from a siccative oil, a monomer, oligomer or polymer with a silane function, a cyanoacrylate, a reactive silicone, and mixtures thereof.

8. Assembly according to Claim 6, characterized in that the activatable compound and the supplementary compound have, respectively, complementary functional groups.

9. Assembly according to Claim 8, characterized in that the activatable compound and the supplementary compound are, respectively, a nucleophilic compound and an electrophilic compound, for example a polyamine and a polyanhydride or two distinct reactive silicones.

10. Assembly according to Claim 8, characterized in that the activatable compound and the supplementary compound are, respectively, a cationic polymer and an anionic polymer.

1 1. Assembly according to Claim 8, characterized in that the activatable compound and the supplementary compound are, respectively, a carbonate or alginate compound and a calcium-based compound.

12. Assembly according to any one of the preceding claims, characterized in that the composition also comprises a catalyst.

13. Assembly according to any one of the preceding claims, characterized in that the mould (2) comprises at least two cavities (5), preferably at least six cavities (5), and even more preferentially at least ten cavities (5).

14. Assembly according to any one of the preceding claims, characterized in that the cavity or cavities (5) is (are) formed by bringing two jaws (3a, 3b) together.

15. Assembly according to any one of the preceding claims, characterized in that each cavity (5) has an elongated shape, with a curvilinear or rectilinear longitudinal axis.

16. Assembly according to any one of the preceding claims, characterized in that the device (1) comprises at least one heating element (30) which serves to increase the temperature of the cosmetic composition, the increase in the temperature inducing an increase in the reactivity of the composition.

17. Assembly according to any one of the preceding claims, characterized in that the device (1) comprises at least one system providing energy, in particular in the form of light or heat.

18. Assembly according to any one of the preceding claims, characterized in that the device (1 ) comprises at least one system for admitting material, which serves to introduce a part or all of the cosmetic composition into the mould (2) cavity or cavities (5), and in particular comprises one or more injection channels (8) communicating with one or more mould (2) cavities (5).

19. Assembly according to any one of the preceding claims, characterized in that the device (1) comprises at least one light element (32), in particular IR, UV or visible light element, or microwave element.

20. Assembly according to any one of the preceding claims, characterized in that the mould. (2) is disposable.

21. Assembly according to any one of the preceding claims, characterized in that at least one part of the cosmetic composition, in particular the entire cosmetic composition, is initially present in the mould (2) before introduction of the fibre(s) into the mould (2), or even is contained with the mould in sealed packaging.

22. Assembly according to any one of the preceding claims, characterized in that the device (1 ) comprises one or more additional fibres (12), the cosmetic composition ensuring the attachment of the additional fibre(s) (12) to the human keratin fibre(s), in particular with the additional fibre(s) (12) dedicated to extending the human keratin fibre(s), with or without axial overlap between the two types of fibres.

23. Assembly according to the preceding claim, characterized in that the additional fibre(s) (12) are prepositioned in the mould (2) cavity or cavities (5) or interlinked with a support which makes possible to preposition them.

24. Assembly according to any one of the preceding claims, each cavity constituting a space which is substantially entirely closed, notably entirely closed, in the absence of keratin fibre.

25. Assembly according to any one of the preceding claims, each cavity delimiting a space which is closed with the exception of one end via which the keratin fibre(s) which are at least partially introduced into the cavity communicate with the exterior.

26. Process for cosmetic treatment of one or more keratin fibres, in particular of one or more eyelashes or eyebrows, comprising at least the step consisting in moulding a fluid cosmetic composition, containing at least one compound which is activatable by means of a physical or chemical stimulus, said composition being solidifiable via the conversion of the activated form of said compound into a solid material, by self-reaction and/or interaction with at least one supplementary compound, onto at least one part of said fibres, by means of one or more cavities (5), of a mould (2), into which said fibres are at least partially introduced.

27. Process according to the preceding claim, characterized in that said fibres are, optionally individually, at least partially introduced into said cavities (5).

28. Process according to either one of Claims 26 and 27, characterized in that the entire composition or part of the cosmetic composition is deposited on just one part of the length of at least one of said fibres, better still on just one part of the length of each of said fibres.

29. Process according to any one of Claims 26 to 28, characterized in that the cosmetic composition is introduced in the liquid state into the mould so as to subsequently solidify therein, in particular by self-reaction or interaction with at least one supplementary compound.

30. Process according to any one of Claims 26 to 29, characterized in that the cavity or cavities (5) of the mould (2) are formed by bringing two jaws (3a, 3b) together, in particular according to a translational and/or rotational movement of one of the jaws with respect to the other.

31. Process according to any one of Claims 26 to 30. characterized in that at least one part of the cosmetic composition, in particular the entire cosmetic composition, is initially present in the mould (2) before introduction of the fibre(s) into the mould (2).

32. Process according to any one of Claims 26 to 31, characterized in that at least one part of the cosmetic composition, in particular the entire cosmetic composition, is injected into the mould (2), via at least one injection channel (8).

33. Process according to any one of Claims 26 to 32, characterized in that the cosmetic composition is moulded onto at least one part of at least one of said human keratin fibres and of at least one additional fibre (12), the cosmetic composition ensuring the attachment of the additional fibre(s) (12) to the human keratin fibre(s), in particular with the additional fibre(s) (12) dedicated to extending the human keratin fibre(s), with or without axial overlap between the two types of fibres.

34. Use of a fluid cosmetic composition containing at least one compound which is activatable by means of a physical or chemical stimulus, said composition being solidifiable via the conversion of the activated form of said compound into a solid material, by self-reaction and/or interaction with at least one supplementary compound, for application thereof as a moulding material in at least one cavity of a mould, for the purposes of depositing on keratin fibres, in particular eyelashes and eyebrows, via the application of said mould to said fibres.