FR2927236A1 - Cosmetic assembly for make-up of face skin, has sonotrode coupled to piezo-electric transducer, and collar that is bent under effect of vibrations of sonotrode so as to spray cosmetic or dermatologic composition in form of droplets - Google Patents

Abstract

The assembly has a liquid cosmetic or dermatologic composition, whose viscosity is greater than or equal to 10 milli Pascal seconds, where the composition includes oil and colorant. A spraying device (1) has an aluminum sonotrode coupled to a piezo-electric transducer. The sonotrode is crossed by a channel. The channel is placed in communication with the composition and projected on an ejection surface (4) at non null distance from a peripheral edge of an end collar. The collar is bent under the effect of vibrations of the sonotrode so as to spray the composition in the form of droplets. An independent claim is also included for a method for make-up of a skin.

Description

The present invention relates to a spray assembly comprising a cosmetic composition having a specific viscosity and a spray device in the form of a piezoelectric spray.

Traditional make-up products such as, for example, foundations make it possible to improve the aesthetics by giving the face more relief and by intensifying their color.

These products have various textures ranging from fluid to solid and usually contain pulverulent materials. Their viscosity is often higher than that of perfumes or water. One of the difficulties encountered by the users is to be able to spread the composition uniformly, for example the foundation over the entire surface of the face, so as to evenly distribute the product. Very thick or solid texture compositions are difficult to spread because of their high viscosities. Fluid texture compositions are not always suitable for uniform makeup, leaving no visible marks on the skin, especially because of their poor spread over the entire surface of the face to make up.

To address these issues, it has been proposed to spray makeup compositions using pressurized liquefied gas aerosol generator. Such gases generally include volatile organic compounds (VOCs).

The introduction of new legislation tends to impose a reduction in the amount of volatile organic compounds (VOCs) released into the atmosphere by aerosol-generating gases. To achieve this reduction, a non-VOC propellant such as HFA 152a can be used to partially or completely substitute the propellants usually used.

Nevertheless, the use of this type of gas is not allowed in all countries. Another way to limit the use of VOCs is not to use propellant gas, using a spraying device equipped with a mechanical pump. The Procter & Gamble company has, for example, proposed in its applications WO 2001/12137 and WO 2001/12138, an electrostatic spraying system that does not require a propellant gas. This type of system has the disadvantage of not allowing to spray compositions comprising water. This is troublesome when it is desired to convey water-soluble active agents.

However, the presence of pulverulent materials such as pigments or fillers, which are usual in cosmetic compositions, has the disadvantage of destabilizing the compositions, in particular the emulsions, and significantly increasing the viscosity of the phase which comprises them. Increasing their viscosity makes these compositions difficult to spray.

In addition, certain spraying systems do not allow the diffusion of these powdery particles which can stop the diffusion head. There is therefore a need for a cosmetic product having a viscosity greater than that of water, and which can be applied to the skin evenly, even when used over a wide body surface.

The inventors have shown that it is possible to obtain satisfaction in these terms by spraying a composition having a viscosity greater than 10 mPa.s using a specific piezoelectric spraying system.

Such a system notably makes it possible to effectively spray the cosmetic composition and to obtain a homogeneous, natural result that does not mark the imperfections of relief of the skin.

In particular, the subject of the invention is, according to a first aspect, a cosmetic assembly comprising: i) a cosmetic or dermatological composition comprising a physiologically acceptable medium and contained inside a reservoir, said composition being liquid and exhibiting a viscosity greater than or equal to 10 mPa.s; and ii) a device for spraying said composition, comprising a sonotrode (82), coupled to a piezoelectric transducer, this sonotrode being traversed at least in part by a channel that can be placed in communication with the composition in the reservoir and opening onto a end flange (140) defining an ejection surface (4) of the composition in the form of droplets, the channel opening onto the non-zero distance ejection surface of a peripheral edge of the flange, the latter being suitable to bend under the effect of vibrations of the sonotrode so as to spray the composition in the form of droplets. The subject of the invention is also, according to a second aspect, a process for making up the skin comprising at least one step of spraying a cosmetic or dermatological composition as defined previously by means of the device mentioned above. According to a third aspect, the subject of the invention is also the use of a cosmetic assembly as described above, for obtaining a deposit, in particular of make-up, which is homogeneous and natural and does not mark the imperfections of relief of the skin.

Piezoelectric spraying device The subject of the invention is a cosmetic assembly comprising a liquid cosmetic or dermatological composition contained inside a reservoir and a device for spraying said cosmetic composition, said spraying device being equipped with a transducer. The piezoelectric spraying system for the purpose of the present application is understood to mean a system which nebulises a liquid under the action of an ultrasonic energy of appropriate frequency and power. energy produced by a piezoelectric material (transducer) excited by a high frequency electrical signal.

According to a first embodiment, the piezoelectric spraying device may comprise: - a perforated membrane, the perforations of the membrane communicating the interior of the container with the external environment, - an actuator for vibrating the membrane, - a means for bringing the liquid cosmetic composition contained in the container into contact with an inner surface of the membrane, the cosmetic composition, under the effect of vibrations of the membrane flowing through the perforations to an outer surface of the membrane from where it emerges in the form of droplets.

The perforations in the membrane preferably have an inverted conicity, i.e. a larger cross-sectional area on the outer surface of the membrane, facing the external environment, than on the inner surface, making face inside the container.

The spraying device may further comprise pressure shifting means, as described in WO95 / 15822, providing reduced pressure to the liquid in contact with the inner surface of the membrane. The reduced pressure may vary from zero pressure to the pressure at which air is drawn through the perforations of the membrane in contact with the composition.

Preferably, the perforations on the outer surface of the membrane do not touch each other.

More preferably, the actuator is a piezoelectric actuator, for example designed to vibrate the membrane in a frequency range from 20 KHz to 7 MHz. The energy required for the operation of the piezoelectric actuator can be obtained by means of an electric generator, for example an electric battery, a battery or a photovoltaic cell that can optionally be coupled to an electronic circuit.

In the spraying device defined above, the means for bringing the liquid cosmetic composition to the surface of the membrane may comprise a capillary supply mechanism, or alternatively a bubble generator feed mechanism or a pump. peristaltic, diaphragm, piston, gear type. Such mechanisms are described for example in international application WO95 / 15822. According to a particular embodiment of the invention, all the perforations have an inverted conicity 40, or conversely, the membrane has, in addition, perforations of normal conicity.

By perforation of normal conicity is meant in the sense of the present invention perforations whose cross-sectional area is smaller on the outer surface of the membrane, facing the external environment, than on the inner surface, facing the inside of the container. When normal conical perforations are present, these are preferably disposed around and outside the inverted conical perforations.

The means for bringing the liquid cosmetic composition to the surface of the membrane may be designed to bring said composition to the inner surface of said membrane, or conversely to be designed to bring said composition to the outer surface of said membrane. Such variants of the spraying device are described, for example, in International Application WO95 / 15822.

For example, the membrane may be formed of a circular disk with a diameter of 8 mm, electroformed nickel, a thickness of 701um having a plurality of perforations. The perforations may have a circular disk-shaped cross-sectional area varying in diameter from 4 to 150 μm on the outer surface of the membrane, facing the external environment, and on the inner surface, facing the inside. of the container, a cross-sectional surface in the form of a circular disc whose diameter varies from 2 to 50 μm, and for example from 10 to 201 μm.

When using the device, the cosmetic composition emerges in the form of droplets whose mean diameter is preferably between 20 and 100 μm, and even more preferably between 30 and 60 μm. Technologies corresponding to this device have in particular been described in the applications WO 93/10910, US 5, 487, 378, FR-A-2665572 and US 4,533,082; US5518179 and US6113001.

According to a second embodiment, the ultrasonic spray device may comprise a micro-machined substrate, a cavity in the substrate for containing the liquid substance to be sprayed, means for supplying the liquid into the cavity of the substrate and means for exit of the liquid which is vaporized in the form of mono-dispersed droplets under the action of vibrations.

The output means consist of at least one micro-machined channel in the subsrat which communicates with the cavity. For example, the substrate is made of silicon. The pressure wave generating device 30 is for example glued under the cavity. The generated pressure wave expels a quantity of liquid contained in the cavity through the micro-machined channels. The quantity of liquid expelled in the form of fine droplets is a function of the pressure wave generated for example by a piezoelectric type ceramic.

With such a device, it is possible to determine the exact amount of liquid sprayed.

Technologies corresponding to this device have been described in particular in application EP 1149602.

According to a third embodiment, the ultrasonic spray device may use a coupler (the horn) to mechanically transmit the vibration.

In particular, the ultrasonic sputtering device may be an ultrasonic oscillator system comprising: - a conically shaped coupler (also called frustum), - a piezoelectric oscillator and - a circular resonance plate.

The tapered coupler (frustum) preferably comprises two circular surfaces - one of large section and the other of smaller section - and a conical surface.

The piezoelectric oscillator itself is in the form of a disc fixed on the circular surface of greater section of the coupler, and is provided with two circular electrodes fixed on each of its surfaces. A lead wire is attached to each of the electrode plates. It is the piezoelectric oscillator that generates the vibrations.

The resonance plate, made of the same material as the coupler, is an integral part of the circular surface of smaller section of the coupler.

A groove is formed on the conical surface of the coupler for adapting a support member to said coupler. The support member stabilizes the entire ultrasonic oscillator system, while allowing it some flexibility to not alter the vibrations. The support member has an orifice through which blown air passes by means of a fan. The liquid to be sprayed is delivered through a supply channel on the surface of the circular resonance plate, and the sprayed liquid particles are driven by the blown air.

Technologies corresponding to this device have in particular been described in applications WO91 / 16997, US 4, 474, 326 and FR2285930. In particular, the preferred spray device of a composition according to the invention comprises a sonotrode (82), coupled to a piezoelectric transducer, this sonotrode being traversed at least in part by a channel that can be placed in communication with the composition in the reservoir and opening onto an end flange (140) defining an ejection surface (4) of the composition under form of droplets, the channel opening on the non-zero distance ejection surface of a peripheral edge of the collar, the latter being able to flex under the effect of the vibrations of the sonotrode so as to spray the composition in the form of droplets.

In particular, the sonotrode has a longitudinal axis X, and the channel opens on the ejection surface along said axis X. The invention provides a spray leading to satisfactory results. The invention makes it possible to have a relatively high spraying efficiency. The flange may, during oscillations, be deformed by changing the shape of the ejection surface, which may for example pass from plane at rest to concave or convex towards the front. The amplitude of deflection forwards or backwards may be greater than or equal to 5 μm relative to the rest, being for example between 5 m and 25 m with respect to rest, ie a total amplitude of 10 to 50 m. The minimum thickness of the end flange in the particle ejection region of the product is, for example, 0.4 to 0.6 mm, more preferably 0.45 to 0.55 tom, being preferably 0.5 mm.

The ejection of the droplets of product can take place on the entire circumference of the end flange, which contributes to obtaining a homogeneous spray.

The invention also relates to a cosmetic assembly comprising: i) a cosmetic or dermatological composition comprising a physiologically acceptable medium and contained inside a reservoir, said composition being liquid and having a viscosity greater than or equal to 10 mPa .s; and a device for spraying said composition, comprising a sonotrode (82) and a piezoelectric transducer coupled to the sonotrode, this sonotrode being traversed at least in part by a channel which can be placed in communication with the composition in the reservoir and opening onto a end flange (140) defining an ejection surface (4) of the composition in the form of droplets, the channel opening onto the non-zero distance ejection surface of a peripheral edge of the flange, the sonotrode comprising also a portion of decreasing diameter extended by a cylindrical portion (132) connecting to the end flange, the diameter ratio (D) of the flange / diameter (D3) of the cylindrical portion being between 12 and 32. 20 According to another of its aspects, the subject of the invention is also a device for spraying a cosmetic or dermatological product, comprising a sonotrode and a t transducer coupled to the sonotrode, the sonotrode having an end flange defining an ejection surface of the product particles, the sonotrode also having a portion of decreasing diameter extended by a cylindrical portion (also called horn) connecting to the flange end,

the ratio transducer diameter / diameter of the cylindrical portion being less than or equal to 4.5, better still 4, more preferably 3.7 and preferably greater than or equal to 3, more preferably between 3.5 and 3.7, and or

the diameter ratio of the flange / diameter of the cylindrical portion being between 7/6 and 13/4, and / or

the ratio of the diameter of the flange / thickness of the flange being between 70/6, for example 12, and 130/4, for example 32.

These geometric characteristics lead to particularly satisfactory results.

The flange may have a larger transverse dimension less than or equal to 2J4, where 2. is the wavelength in the sonotrode material of the ultrasonic wave.

The length of the sonotrode, between the face of the sonotrode in contact with a transducer for vibrating the sonotrode and the ejection surface may be less than or equal to 2L.

The sonotrode may include a product delivery channel, and this product delivery channel may have a narrowed portion.

The narrowed section can slow the flow of the product and improve the performance of the spray. The narrowed portion may in particular allow to obtain a relatively homogeneous spray. The presence of the narrowed portion facilitates the manufacture of the rest of the channel, which may have a relatively large section, which limits the pressure losses. The narrowed portion may provide some capillary restraint in the absence of use of the device and reduces the exchanges with the air. The use of a shutter for the supply channel can be avoided. The sonotrode is coupled to a transducer for transforming electrical energy into ultrasonic vibrations. The resonance frequency of the sonotrode is preferably as close as possible to that of the transducer. Coupling can be effected for example by gluing or screwing. The product particles are advantageously driven to the region to be treated by a flow of air produced by at least one fan. The air flow is for example between 4 and 7 m3 / h, better between 5.5 and 6.5 m3 / h.

In an exemplary embodiment, the narrowed portion opens onto the ejection surface. The narrowed portion may have a constant cross section over a distance of at least 1 mm and less than or equal to 10 mm. The length of the narrowed portion is for example less than or equal to 7 mm, better between 1 mm and 5 mm, being for example 2.5 mm. The narrowed portion may have a constant cross-section from the end where it opens onto the ejection surface to the opposite end.

The narrowed portion advantageously has a circular cross section, which facilitates its realization.

The channel may have a circular cross section along its entire length.

The channel is advantageously rectilinear, with the same longitudinal axis as the sonotrode. The narrowed portion may have a smaller cross section less than or equal to 0.8 mm 2. The narrowed portion may in particular have a diameter less than or equal to 1 mm, for example between 0.4 mm and 0.8 mm, preferably close to 0.6 mm.

The channel may have a larger cross section greater than or equal to 0.8 mm 2.

The channel may have, outside the narrowed portion, a diameter of between 1 mm and 2 mm, for example close to 1.5 mm, or even greater, especially when the transducer is fixed by bolting on the sonotrode.

The shrunken portion length / total length of the sonotrode canal can be between 0.04 and 0.4. The ratio at the widest cross-sectional area of the channel / narrowest section of the channel may be between 1 and 25, especially between 4 and 10, for example 6 and 6.5.

The channel can feed the ejection surface through a single outlet port, which can be located at the center of the ejection surface.

The sonotrode can be made monolithically with a connection piece to a product supply tube of the channel. This feed tube may be a flexible conduit, which allows the use of the conduit within a peristaltic pump. The connection of the channel 45 to the supply duct can still be done differently, for example by means of a nozzle inserted into the sonotrode. The transducer may be traversed by the nozzle, having for example an annular shape.

The outer diameter of the end flange is for example between 7 and 13 mm, better 8 and 12 mm, more preferably 9 and 11 mm, preferably close to 10 mm. Good results can be obtained, in an exemplary embodiment, with a diameter of 10 mm for the end flange and a minimum thickness of 0.5 mm for the collar, for a frequency of 100kHz 10%.

The peripheral annular range of the flange where the thickness of the flange is relatively small, in particular less than or equal to 0.6 mm, may have a width, measured radially greater than or equal to 0.2 mm, for example from 0, 2 mm to 2 mm.

The end flange may comprise an annular range 0.5 mm thick which extends over a width, measured radially, of at least 0.5 mm. The sonotrode may have a portion whose outer cross section decreases toward the ejection surface, in particular a frustoconical portion. The angle at the top of this frustoconical portion may be between 10 ° and 45 °, in particular be 30 °.

The sonotrode may have a cylindrical portion of revolution, as mentioned above. The decreasing outer section portion may be connected to this cylindrical portion of revolution, the cylindrical portion of revolution being intermediate between the decreasing section portion, in particular frustoconical, and the end collar.

The outside diameter of the cylindrical portion of revolution is for example between 4 and 7 mm, in particular may be close to 5.5 mm.

The length of the cylindrical portion of revolution is for example between 3 and 5 mm.

The length of the different portions of the sonotrode is preferably chosen according to the nominal frequency at which the sonotrode is intended to resonate, the ejection surface preferably having to be substantially at a belly of vibrations. The distance between the ejection face and the transducer as well as the diameter of the end flange may depend on the wavelength 2 = c / f, where c is the velocity of sound in the material at the temperature of d. use, and f the frequency.

The sonotrode may be machined, preferably being made of metal, in particular aluminum or aluminum alloy, titanium or its alloys, stainless steel, for example 316 stainless steel

The excitation frequency of the transducer is, for example, between 30 and 200 kHz. For example, the excitation frequency may be of the order of 100 kHz 10%.

The average particle size of the spray depends on the frequency and rheological characteristics of the fluid to be sprayed. The average size is, in an exemplary implementation of the invention, between 20 and 25 m, especially at a frequency of 100 kHz. The level of fine particles smaller than 10 m can be less than 10%. The invention further relates, in another of its aspects, a device for packaging and spraying a cosmetic or dermatological product, comprising a head as defined above. This device may comprise a container containing the product to be sprayed. This product may be a care or makeup product, especially a foundation or a product comprising a styling agent, a self-tanning agent or a sunscreen composition.

The container may be in the form of a removable cartridge. The product can be contained in a soft pouch.

The device may comprise a housing with, in particular in the upper part, a housing for receiving the aforementioned cartridge.

The air flow directed to the keratin materials may be heated or cooled as required.

In an exemplary implementation of the invention, the spraying is triggered by an action 20 of the user on a control member such as a push button for example.

Once a spraying cycle is triggered, a spraying sequence comprising the following steps can take place: i) starting a fan creating a product particle entrainment air flow, ii) after a predefined delay, vibration of the sonotrode by a transducer, iii) after a new delay, starting a pump supplying the sonotrode product.

At the end of the spraying cycle, the shutdown of the device may successively include stopping the pump, stopping the transducer, and stopping the fan.

The invention further relates, in another of its aspects, to a spraying device comprising a nozzle, a support disposed inside the nozzle, a sonotrode coupled to a transducer, fixed by snapping on the support, with interposing a seal between a shoulder of the support and a shoulder of the sonotrode.

This aspect of the invention facilitates mounting of the sonotrode in the device.

The invention further relates, according to another of its aspects, to a spraying device comprising a sonotrode, a ring-shaped transducer coupled to the sonotrode, the latter being made monolithically with a tip on which a tube is inserted. supply of product to be sprayed. This aspect of the invention facilitates the construction of the device. Another object of the invention is, according to another of its aspects, a cosmetic treatment method, for example skin, especially makeup, or hair treatment, comprising the step of spraying a cosmetic product on the human keratin materials concerned, using a spray head as defined above.

The invention will be better understood on reading the following detailed description, nonlimiting exemplary embodiments thereof, and on examining the appended drawing, in which:

FIG. 1 schematically represents, in elevation, an example of a spraying device produced in accordance with the invention, FIG. 2 represents the device of FIG. 1 with the product cartridge in place, ready to spray,

FIG. 3 shows the device of FIG. 1 with the access flap 15 for receiving the cartridge open, waiting for the cartridge to be placed on the housing,

FIG. 4 is a diagrammatic and partial view, in exploded perspective, of the device of FIGS. 1 to 3,

FIG. 5 represents in perspective, in a schematic and partial manner, the spray assembly,

FIG. 6 is a diagrammatic and partial longitudinal section of the spray assembly of FIG. 5; FIG. 7 represents, in isolation, the support of the transducer;

FIG. 8 represents, in perspective, the sonotrode, FIG. 9 is an elevational view of the sonotrode,

FIG. 10 is a longitudinal section of the sonotrode, along X-X of FIG. 9,

FIG. 11 shows in perspective an alternative embodiment of the sonotrode, FIG. 12 is a schematic and partial longitudinal section of a spray head comprising the sonotrode of FIG. 11, and

Figure 13 schematically shows, in perspective, the heating resistor of the heater.

The spraying device 1 shown in Figures 1 to 3 comprises a housing 2 manipulated by the user for spraying a product on the skin or other human keratin materials, such as lips or hair. In the example under consideration, the casing 2 carries a push-button 3 which enables the user, by pressing on it, to trigger the spraying. This push button 3 could alternatively be located elsewhere and replaced by a trigger or a touch sensor, for example.

The device 1 comprises at the front, as can be seen in Figure 2 in particular, a surface 4 for ejection of the product particles. This surface can be oriented to the region to be treated, during use, so as to allow the product particles to be deposited on this region.

The housing 2 comprises in the example in question a protective cover 12 which can be folded down in front of the ejection surface 4 in the absence of use. This cover 12 is for example articulated on the body of the housing, between a lowered position where it covers the ejection surface 4 and a raised position. In an alternative embodiment, the housing is devoid of a protective cover or the latter is mounted otherwise in the housing.

The cover 12 may extend in the continuity of the outer surface of the housing 2, in the folded position.

The housing 2 can accommodate a cartridge 15 containing the product to be sprayed, this cartridge 15 being introduced into a housing 17 of the housing 2.

As can be seen in FIG. 3, this housing 17 can be closed in the absence of use by a shutter shutter 18.

In the example illustrated, the housing 17 is open upwards.

The shutter 18 can be slidably mounted on the housing 2. In variants not shown, the housing 17 is disposed otherwise on the housing.

The product contained in the cartridge 15 is for example a foundation, a self-tanner, a body or face lotion or a product containing a styling agent.

The capacity of the cartridge is for example between 1ml and 100ml, better between 5m1 and 20m1, especially 10ml.

In a variant not shown, the device 1 can receive several cartridges containing different products or a cartridge containing several products, with a means for selecting the product to be sprayed, or alternatively a means for adjusting the proportion of a product by relative to each other in the spray mixture. Where appropriate, the same cartridge may contain several products with a means of selecting the product to be sprayed or adjusting the proportion of the different products in the spray mixture.

The housing 2 comprises at the front, in this example, a general on / off switch 22 and an indicator 23 serving as an operating indicator. The casing 2 comprises, on the sides, air intakes 30. It can be seen in FIG. 4 that the body of the casing 2 can be formed by assembling two half-shells 2a and 2b. The latter are for example mounted with a tight fit, 45 45 possibly reversible, being for example snapped onto one another and / or held by screws. These half-shells 2a and 2b are for example made by molding a thermoplastic material.

The cartridge 15 may comprise two half-shells 15a and 15b which are gathered around a flexible pouch 35 containing the product to be sprayed, this pouch 35 being for example heat-sealed on a connection piece 38 intended to be engaged on a nozzle of suction 40 present in the housing 17.

The use of a flexible bag 35 allows product removal without air intake in the pocket. Alternatively, the cartridge may contain a reservoir other than a flexible bag, for example a tank with a moving bottom.

The cartridge may comprise, in an alternative embodiment, a visual indicator of the degree of emptying, for example a transparent window made in one of the half-shells 15a and 15b and / or in the flexible bag 35.

The half-shells 15a and 15b are for example mounted with a tight fit, possibly reversible, being for example snapped and / or glued to one another or otherwise fixed, being for example made of a thermoplastic material, opaque or transparent.

The arrangement of the removable cartridge 15 in the upper part of the device allows to benefit from a gravity effect for the supply of the product.

If necessary, a cartridge of a cleaning product may be used instead of a usual cartridge to clean the device, in particular the sonotrode and the ejection surface.

The device may be provided to the user, for example within a common package, with one or more cartridges containing one or more products to be sprayed and the cleaning cartridge above.

The cleaning cartridge can be rechargeable or not.

The cleaning solution may be chosen from one of the solvents of the cosmetic composition in order to be compatible with it, and may comprise, for example, isododecane, a volatile silicone or else alcohol or water.

The device may include, where appropriate, a cartridge recognition system, for example by means of an electromechanical probe, electrical contacts or an RFID chip.

The knowledge by the device 1 of the contents of the cartridge in place can make it possible to automatically adapt operating parameters to the device of the product to be sprayed, for example the product flow rate, the excitation frequency, the air flow and / or the air temperature if any.

The housing 2 houses a source of electrical energy 43, for example one or more accumulators or batteries, and a printed circuit 45 carrying the electronic components of the device 1. These 40 45 components ensure the generation of the voltage required for spraying, the control of the various electrical elements and can perform ancillary functions such as for example the calculation of the amount of product remaining to be sprayed, to signal to the user the need to replace the cartridge.

The opening of the housing 2 by separation of the half-shells 2a and 2b may be necessary to replace the batteries. Alternatively, access to the battery compartment can be done without opening the housing, through an access door to this compartment. The spraying device 1 may comprise, if necessary, an electrical connector for recharging an accumulator present in the housing.

The housing 2 also houses a set (also called spray head) 50 and a pump 53, the latter being connected on the one hand to the suction nozzle 40 and on the other hand to the spray assembly 50 by a tube 55, which is preferably a flexible conduit.

The pump 53 is for example of the peristaltic type, comprising an electric motor 57 rotating one or more rollers bearing on the flexible conduit 55 to push the product to the spray assembly 50. The product flow during operation of the pump 53 goes for example from 0.05 g / min to 2 g / min. In this case, the flow can be adjustable by the user with certain preset values.

In variants not shown, other types of pumps are used, for example gear, diaphragm or piston. A gravity feed or retractable elastic bag 25 may be further contemplated.

The spray assembly 50 has, at the rear, a fan 60, as can be seen in Figure 4, this fan 60 has not been shown in Figure 5 for the sake of clarity of the drawing. The spray assembly 50 also comprises a nozzle 65 comprising a tubular body, closed at the rear by a plug 70 provided with openings 71 for the passage of the air blown by the fan 60.

The fan 60 is for example fixed on the plug 70, for example by screws.

The axis of rotation of the fan is for example merged with the longitudinal axis of the nozzle 65.

The air flow injected into the nozzle 65 by the fan 60 is for example between 4 and 7 40 m3 / h.

The air is sucked by the fan 60 outside the housing 2 through the gills 30.

The fan 60 can operate continuously as soon as the user has switched on the device by means of the main switch 22 or, alternatively, only when the user triggers the spraying by pressing the push-button 3. In an example , the operation of the fan may extend after the end of the spraying for a predefined duration or until a new action of the user on the device, to allow the user to take advantage of the air blown for accelerate the drying of the product deposited on the region to be treated.

Still in an exemplary implementation of the invention, a spraying cycle controlled by an action on the push button 3 comprises first of all the startup of the fan, then after a delay of between 300 and 800 ms per minute. For example, about 500 ms, the spray head is excited, then after a new delay, for example between 300 and 800 ms, in particular of the order of 500 ms, the pump 53 is turned on. The stop of the spraying is carried out when the push-button 3 is released, the above steps succeeding one another in the reverse order.

The device 1 advantageously comprises a means 200 for heating the air blown towards the surface on which the spray is sprayed. This speeds up the drying of the product and the device is thus more comfortable to use. It can also heat up the sonotrode and reduce the viscosity of the product, facilitating its flow and spraying.

The heating means 200 comprises for example an electric heating resistor 210 which can be integrated in the fan 60 or placed upstream or downstream of the fan, preferably upstream, as shown in FIG. 6. The heating means 200 is for example attached to the fan 60.

In one example, the heating resistor 210 consists of a Nichrome wire 0.51 mm in diameter and 2.8 m in length, wound in the form of a spring as shown in FIG. 13, placed behind the fan 60 , and fed with a power of 36 W. Such a heating resistor makes it possible to produce a flow of air at the temperature of 36 ° C to 10 cm from the product ejection surface.

The nozzle 65, the fan 60 and the heating means 200 may constitute a monobloc assembly easily mountable in the housing 2. In addition, the alignment of these elements makes the device relatively compact.

The temperature at which the hot air leaves the nozzle 65 is for example between 30 and 40 ° C, ideally about 37 ° C. The air outlet temperature can be regulated, if necessary, by the presence of a temperature sensor exposed to the hot air flow and an electronic control loop.

The device can be arranged to allow the user to choose between an operation where the air blown by the device is heated and an operation where it is not.

This choice can be made for example by a selector actuated by the user, this selector being for example controlled by a greater or lesser pressure on the push button-45 triggering the spray. For example, a moderate pressure on the push-button 3 triggers the air-blast spraying at room temperature and a higher pressure triggers the hot-air spraying.

The heater may turn on at the same time as the fan is turned on and off at the same time, or the respective starts may be delayed in time.

The spraying device 1 can be arranged to go into a standby mode in the absence of actuation of the push button 3 for a predefined duration. The return to normal operation of the device may then require pressing the push button 3 or the actuation of the main switch 22.

The body of the nozzle 65 is provided with a lateral opening 75 for the passage of the product supply tube 55, and houses a support 78 which holds a piezoelectric transducer 80.

The latter is mechanically coupled to a sonotrode 82 making it possible to amplify the electromechanical vibrations of the transducer 80, which are radial or longitudinal, in order to transmit them to the ejection surface 4, the latter being defined by an end flange 20 sonotrode 82.

In the example, it is machined aluminum but other materials, including other metals or alloys can be used.

The rear face of the sonotrode 82 is glued to the transducer 80, but the fixation could still be effected otherwise, in particular by mechanical means such as screwing.

The body of the nozzle 65 is for example cylindrical of revolution and may be molded in a thermoplastic material. The nozzle 65 may have, at the front, a convergent portion 85, terminating in an opening 90 having the same axis X as that of the sonotrode 82. This opening 90 is circular in the example under consideration, with a diameter of between 14 and 20 mm, for example of the order of 16 mm.

The convergent portion 85 projects into a recess 91 of the housing 2, formed by the assembly of the half-shells 2a and 2b, the bottom of this recess 98 defining an opening 97 which can locally marry the outer section of the nozzle 65.

In the example illustrated, the flow of air blown by the nozzle 65 is not deflected by the rest of the housing, the recess 91 being sufficiently wide.

The air blown by the fan 60 leaves through the opening 90 in a flow of air generally directed along the axis X.

As can be seen in FIG. 6 in particular, the ejection surface 4 protrudes with respect to the plane P of the opening 90 by a distance d. The plane P of the opening 90 is perpendicular to the axis X. The distance d is, for example, between 2 and 4 mm, better still 2 to 3 mm, more preferably 2.2 and 2.9 mm, especially for a diameter of the aperture 90 of about 16 mm. Such values make it possible to obtain a relatively homogeneous spray with few losses at 5 or 10 cm away from the ejection surface 4.

A distance d out of the range above can lead to a less good homogeneity of the spray, with for example a central lack and / or a less precise product spot.

The support 78, which is for example molded in one piece of a thermoplastic material, comprises a portion 92 provided to force-fit into the central lumen 72 of the stopper 70, up to the stop of a shoulder 93 of the support 78 against the inner face 94 of the cap 70.

The support 78 comprises, opposite the mounting portion 92, tabs 100 which are elastically deformable, for example four in number, each provided with a tooth 101 at their end, which allows snap-fastening of the sonotrode 82 and of the transducer 80, as illustrated in FIGS. 5 and 6.

The support 78, in addition to maintaining the sonotrode, can also contribute to a good distribution of the air flow inside the nozzle 65, all around the sonotrode 82.

The transducer 80, which has an annular shape, is in the example considered sandwiched between on the one hand an O-ring 101 and on the other hand the rear face 112 of the sonotrode. A recess 114 is formed in the rear face 112 for the passage of a first electrical supply wire of the sonotrode, contacting the transducer face adjacent to the sonotrode 82. The other face is electrically connected to a second wire. food.

Apart from the recess 114, the sonotrode 82 is in the example considered symmetrical of revolution about the axis X.

Different transducers can be used. A transducer 80 comprising a piezoelectric ceramic that is suitable for the invention is, for example, the one marketed by Ferroperm under the reference 26132. It is a ring-shaped piezoelectric ceramic PZ26 with an outside diameter of 20 mm, inside diameter 3. , 8mm and 2mm thick.

The O-ring 110 rests on a shoulder 116 of the support 78, as can be seen in FIG. 6, and the transducer 80 bears on its face opposite the sonotrode 82 on the seal 110, near its radially outer edge.

The seal 110 allows play-free mounting of the sonotrode 82 and the transducer 80 on the support 78.

45 The sonotrode 82 comprises, at the rear, a first enlarged cylindrical section 120, defining a shoulder 125 on which the teeth 101 can catch.25 The sonotrode 82 extends forward, beyond the shoulder 125, by a frustoconical portion 130 which is connected, by a fillet 131, to a second cylindrical section 132, of axis X. This cylindrical section 132 is connected by a fillet 134 to an end flange 140 whose front face, generally perpendicular to the X axis, defines the ejection surface 4 of the product.

The diameter D of the first cylindrical section 120 is for example between 18 and 22 mm, and is for example 20 mm. This diameter D corresponds for example substantially to the largest diameter of the transducer 80. In a variant, the transducer 80 has a diameter of 15 mm.

The length of the cylindrical section 120 is for example between 1.5 and 5.5 mm, and is for example 3.5 mm.

The largest diameter D2 of the frustoconical portion 130 is for example between 15.5 mm and 19.5 mm and is for example 17.5 mm and the smallest diameter D3 of the frustoconical portion 130 is for example between 8 and 12 mm, and is for example 10 mm. The angle a at the top of the frustoconical portion 130 is 30 ° in the illustrated example.

The radius of curvature of the fillet 131 is for example between 2 and 3 mm and is 2.5 mm in the example shown and that of the fillet 134 is for example between 1 and 2 mm and is 1.5 mm in the illustrated example.

The distance h between the shoulder 125 and the ejection surface 4, measured along the X axis, is for example between 13 and 17 mm and is for example 14.9 mm in the illustrated example.

The distance 12 between the top of the frustoconical portion 130 and the ejection surface 4 is for example between 7 and 10 mm and is 8.4 mm in the illustrated example.

The distance 13 between the rear end of the second cylindrical section 132 and the ejection surface 4 is for example between 4 and 8 mm and is 5.9 mm in the example illustrated.

The distance 14 between the front end of the second cylindrical section 132 and the ejection surface 4 is for example between 1.5 mm and 2.5 mm and is 2 mm in the illustrated example.

The diameter DI of the second cylindrical section 132 is for example between 4 and 6 mm and is 5.5 mm in the example shown and the thickness e of the end flange 140, measured along the X axis near its radially outer edge, is for example between 0.4 and 0.6 0.6 mm and is 0.5 mm in the example shown.

The diameter D7 of the end flange is for example between 7 and 13mm, being 10 mm in the example in question.

45 The rear face of the end flange 140 ends, in the example considered, perpendicular to the axis X.

The thickness of the flange can be constant from its periphery over an annular range of width Ar, measured radially, between 0.2 and 2 mm, being 0.5 mm in the condidéré example.

The ratio D7 / DI is for example between 7/6 and 13/4 and the ratio D7 / e between 70/6 and 130/4.

The invention is not limited to the end flange shape exemplified in the drawing and other forms are possible, for example an elliptical shape. In this case, the term diameter refers to that of the circle circumscribed to the collar. The sonotrode 82 is made in the example under consideration with, at the rear, a tip 150 for connection to the supply duct 55, the end piece 150 being for example monolithic, made by machining with the rest of the sonotrode 82. For example, tube 55 is force-fitted onto tip 150. A product supply channel 160 passes through sonotrode 82 along axis X. A first portion 160a of channel 160 extends with a constant inner diameter, since the lower end 162 of the tip 150 to a point 165 located in the second cylindrical section 132, where the portion 160a it is connected to a narrowed portion 160b by a frustoconical bore 20c.

The inner diameter D5 of the channel 160, on its portion 160a of larger diameter, is for example between 1 and 3 mm and is 1.5 mm in the example shown, and the diameter D6 of the tapered portion 160b is for example between 0.4 mm and 0.8 mm and is preferably 0.6 mm.

The presence of the portion 160a of larger diameter facilitates the machining of the channel 160 and makes it possible not to generate an excessive pressure drop. The presence of the narrowed portion 160b leads to superior performance in the quality of the spray formed. The length 17 of the narrowed portion 160b, measured along the X axis, is for example between 2 and 3 mm and is for example 5 mm.

The transducer 80 is excited for example at a frequency between 30 and 200 kHz, better 60 and 200 kHz, and the pump 53 delivers to the ejection surface 4, via the channel 160 passing through the sonotrode 80, the product to be sprayed.

The excitation frequency of the transducer 80 may be constant, or better, servocontrolled so as to obtain the maximum vibration amplitude of the ejection surface and spray efficiency.

The electronic components of the device may comprise an electronic circuit performing this function in a conventional manner.

The operation of the pump 53 may include, where appropriate, at the end of the spraying, a reversal of the direction of rotation of the motor for a short time, in order to suck up the product present in the channel and reduce the risk of drying and capping the canal. When a voltage is applied to the transducer 80 by means of these first and second supply wires, the transducer 80 vibrates in the example considered radially with respect to the axis X. The vibrations thus generated propagate with an amplification of the amplitude in the sonotrode 82 to the ejection surface 4, which vibrates axially by bending.

Under the effect of vibrations, the end flange 140 is deformed, and the oscillations of the flange 140 cause the ejection of product droplets over its entire circumference.

The average size of the droplets emitted is for example between 20 and 30 m.

The ejected product droplets are entrained by the flow of air leaving the opening 90 towards the surface to be treated, and reaching this surface in the form of droplets.

The product flow rate is for example between 0.5 g / min and 10 g / min depending on the viscosity of the product to be sprayed.

A device according to the invention can make it possible to form, in one example, a product spot of about 40 mm, solid and homogeneous, on the region to be treated. In the example of FIG. 10, the particular values of the dimensions of the sonotrode have been given for a frequency f of 100 kHz;

For a different frequency f ', the dimensions can be changed by a factor f / f, at first.

There is shown in Figure 11 an alternative embodiment of the sonotrode, designed to operate at a frequency of 60 kHz. This sonotrode differs from that illustrated in Figure 10 by its dimensions and the shape of the body 290 located behind the cylindrical portion 132. The sonotrode has an internal thread 220 which allows the attachment of a bolt 250 for maintaining a vibration generator, composed for example of two piezoelectric ceramics 280 mounted head to tail.

The length 17 of the narrowed portion 160c is, for example, 3.5 mm. The length of the cylindrical surface 225 from the opposite end face to the collar 140 to a shoulder 226 of the body 290 is, for example, 18 mm, and the distance from the shoulder 226 to the base 295 of a frustoconical portion 227 adjacent to the cylindrical portion 132 is for example 7 mm.

The housing 229 receiving the bolt 250 communicates with two successive bores 230 and 231 of respective decreasing diameters, for example respectively equal to 4 and 2.5 mm.

The bolt 250 is traversed by a central lumen to bring the product to be sprayed and may include a tip 300 for connecting the hose 55. Of course, the invention is not limited to the embodiments that have just been described. In a non-illustrated variant, the product feed is effected by a needle which directly delivers the product inside the sonotrode, set back from the outlet of the product.

The narrowed portion of the channel may be formed not by a machining of the sonotrode but by reporting thereon a flow reducer, such as for example a small sleeve inserted by force into a channel of suitable diameter of the sonotrode.

The device housing 1 can be given other shapes, in particular a pen shape. The housing handled by the user can be connected, if necessary, by an electric cable to a base comprising at least the power supply.

In a variant not shown, the feed channel opens through several orifices on the ejection surface. These orifices are for example arranged in an axial symmetry. The narrowed portion of the channel may be upstream of the channels communicating with the orifices or alternatively each branch of the channel leading to an orifice has a narrowed portion.

The ejection surface of the sonotrode may have received a surface treatment intended for example to reduce the surface tension. It may be for example a PTFE deposit or a mirror polish.

If necessary, the device may be arranged to allow adjustment of the overflow d of the ejection surface 4 with respect to the opening 90. This may improve the focusing of the spray.

Alternatively, the device may be used to spray a product into the atmosphere.

The expression having one must be understood as being synonymous with at least one unless the contrary is specified.

Value ranges must be inclusive, unless otherwise specified. Viscosity The composition according to the invention is liquid. By liquid is meant a composition which flows under its own weight.

The composition has a viscosity greater than or equal to 10 mPa.s, preferably ranging from 40 to 400 mPa.s and more preferably ranging from 20 to 150 mPa.s and even more preferably from 50 to 100 mPa.s. . The viscosity is measured at 25 ° C., with a Rheomat 180 viscometer equipped with the mobile MK-R-1, 2 or 3 according to the viscosity range and the corresponding measurement cup MB-R-1, 2 or 3, at a speed of of rotation of 200 min-1, the measurement being performed after 10 minutes of rotation (time after which a stabilization of the viscosity and the speed of rotation of the mobile) is observed.

Fatty phase The composition according to the invention may comprise a fatty phase.

The fatty phase may in particular comprise oils, waxes or pasty fatty substances. 10 Oils

The fatty phase may comprise at least one volatile or non-volatile oil.

By volatile oil is meant an oil capable of evaporating from the skin in less than one hour at room temperature and atmospheric pressure. This oil has in particular a vapor pressure, at ambient temperature (25 ° C.) and atmospheric pressure (760 mmHg) ranging from 0.13 Pa to 40 000 Pa (10-3 to 300 mmHg), in particular ranging from 1 , 3 Pa at 13,000 Pa (0.01 to 100 mmHg), and in particular ranging from 1.3 Pa to 1300 Pa (0.01 to 10 mmHg). In addition, the volatile oil generally has a boiling point, measured at atmospheric pressure, ranging from 150 ° C to 260 ° C, and in particular ranging from 170 ° C to 250 ° C.

Advantageously, the volatile oil contains one or more volatile organic oils whose flash point ranges from 30 ° C. to 102 ° C., in particular from 40 ° C. to 55 ° C., and in particular from 40 ° C. to 50 ° C., and their mixtures. By non-volatile oil is meant any medium that may remain on the skin for several hours. A non-volatile oil, in particular a vapor pressure at room temperature and atmospheric pressure, non-zero less than 0.001 mmHg (0.13 Pa).

Volatile oils which may be used in the invention include volatile hydrocarbon oils having from 8 to 16 carbon atoms, linear or branched, and mixtures thereof and in particular branched C 8 -C 16 alkanes such as isoalkanes (also known as isoparaffins). C8-C16, isododecane, isohexadecane and for example the oils sold under the trade names of Isopars or Permethyls, branched C8-C16 esters such as isohexyl neopentanoate and mixtures thereof. In particular, isododecane is used. The volatile oils may also be silicone optionally comprising pendant alkyl or alkoxy groups, or at the end of the silicone chain, the volatile fluoro oils, and mixtures thereof.

As volatile silicone oils that may be used in the invention, mention may be made of linear, branched or cyclic silicone oils having a viscosity at room temperature of less than 8 mm 2 / s and in particular having from 2 to 7 silicon atoms, these silicones possibly comprising alkyl or alkoxy groups having from 1 to 10 pendent carbon atoms or at the end of each silicone. As volatile silicone oil that can be used in the invention, there may be mentioned in particular octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethyl disiloxane or octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane and mixtures thereof. The volatile fluorinated oil does not usually have a flash point.

As fluorinated volatile oil, mention may be made of nonafluoroethoxybutane, nonafluoromethoxybutane, decafluoropentane, tetradecafluorohexane and dodecafluoropentane, and mixtures thereof.

The volatile oil may be present in a content ranging from 1% to 90% by weight relative to the total weight of the composition, preferably from 2% to 80% by weight and still more preferably from 3% to 65% by weight. .

The fatty phase of the composition may comprise a non-volatile oil.

As non-volatile oils that can be used in the invention, mention may be made of hydrocarbon-based oils of mineral or synthetic origin, such as linear or branched hydrocarbons, such as paraffin oil or its derivatives, liquid petroleum jelly, polydecenes, hydrogenated polyisobutene such as Parléam sold by the company Nippon Oil Fats, squalane of synthetic or vegetable origin; oils of animal origin such as perhydrosqualene; vegetable oils of high triglyceride hydrocarbon origin consisting of esters of fatty acids and of glycerol, the fatty acids of which can have various chain lengths, these can be linear or branched, saturated or unsaturated, in particular the fatty acid triglycerides, in particular of 4 to 22 carbon atoms, such as the triglycerides of heptanoic, octanoic acids, and capric / caprylic acids or else the hydroxylated triglycerides, such as sweet almond oil, calophyllum oil, palm, grape seed, sesame, arara, rapeseed, sunflower, cotton, apricot, castor oil, alfalfa, squash, blackcurrant, macadamia, rose hip, nutmeg, avocado, jojoba, olive, cereal sprouts (corn, wheat, barley, rye), shea butter; esters of fatty acids, in particular of 4 to 22 carbon atoms, and in particular of octanoic acid, heptanoic acid, lanolic acid, oleic acid, lauric acid, stearic acid such as propylene glycol dioctanoate, propylene glycol monoisostearate, polyglyceryl diisostearate, neopentyl glycol diheptanoate; the synthetic esters of formula R 1 000 R 2 in which R 1 represents the residue of a linear or branched higher fatty acid containing from 7 to 40 carbon atoms and R 2 represents a branched hydrocarbon-based chain containing from 3 to 40 carbon atoms, for example Purcellin oil (cetostearyl octanoate), isononyl isononanoate, isodecyl neopentanoate, C12-C15 alcohol benzoate, 2-hexyl ethyl palmitate, octyl-2 stearate dodecyl erucate, 2-octyldodecyl erucate, isostearyl isostearate, 2-octyl dodecyl benzoate, octanoates, decanoates or ricinoleates of alcohols or polyalcohols, isopropyl myristate, palmitate isopropyl, butyl stearate, hexyl laurate, diisopropyl adipate, 2-ethyl hexyl palmitate, 2-hexyl decyl laurate, 2-octyl decyl palmitate, myristate of 2-octyldodecyl, 2-diethylhexyl succinate, diisostearyl malate, glycerol or diglycerine isostearate; hydroxylated esters such as isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate; diethylene glycol diisononanoate; pentaerythritol esters; esters of aromatic acids and alcohols comprising 4 to 22 carbon atoms, in particular tridecyl trimellitate; higher C8-C26 fatty acids such as oleic acid, linoleic acid, linolenic acid or isostearic acid; higher C8-C26 fatty alcohols such as oleic alcohol, linoleic or linolenic alcohol, isostearyl alcohol or octyl dodecanol; synthetic ethers containing at least 7 carbon atoms, silicone oils such as polydimethylsiloxanes (PDMS) which are liquid at room temperature, linear, optionally phenylated, such as phenyl trimethicones, phenyl trimethylsiloxy diphenylsiloxanes, diphenyl dimethicones, diphenyl methyldiphenyl trisiloxanes, liquid 2-phenylethyl trimethylsiloxysilicates, optionally substituted with aliphatic and / or aromatic groups such as alkyl, alkoxy or phenyl groups, during and / or at the end of the silicone chain, groups having from 2 to 24 carbon atoms and optionally fluorinated, or by functional groups such as hydroxyl, thiol and / or amine groups; polysiloxanes modified with fatty acids, fatty alcohols or polyoxyalkylenes such as dimethicone copolyols or alkylmethicone copolyols; liquid fluorinated silicones; or the triglycerides of caprylic / capric acids such as those sold by the company STEARINERIES Dubois or those sold under the names Miglyol 810, 812 and 818 by DYNAMIT NOBEL, and mixtures thereof.

According to a preferred embodiment, the oily phase of the composition according to the invention may have a surface tension of less than 33 mN / m, preferably less than 30 mN / m and even more preferably less than 25 mN / m. .

The surface tension of the oil can in particular be measured at 25 ° C. with a Kruss tensiometer (model K 12) with a Du Noüy type ring. The measurements are made on a sufficient quantity of the oily phase placed in a perfectly cleaned crystallizer and the ring is in platinum. The values are corrected by the Harkins & Jordans factor which takes into account the characteristics of the studied liquid (density) and the ring (geometry). In particular, the oily phase of the composition may have a surface tension of less than 33 mN / m may also have a viscosity of less than 42 mPas, in particular ranging from 1 to 36 mPas, preferably from 1 to 25 mPas, and more preferably still from 1 to 20 mPas. The viscosity of the oily phase can in particular be measured at 25 ° C. with a Haake RS 600 rheometer with imposed constraints marketed by the company Thermo Rhéo equipped with a cone / plane geometry wheel of the 60/1 ° type (60 mm for a angle of 1 °).

We impose a stress ramp ranging from 0 to 1000 Pa for 100 seconds. The rheogram representing the evolution of the viscosity is then plotted as a function of the shear rate. The rheogram has a plateau with low values of shear rate (called Newtonian plateau), this plateau corresponds to a stable value of the viscosity which is the viscosity of the oily phase thus determined.

By way of illustration and without limitation, oils making it possible to impart an area tension of less than 33 mN / m to the oil phase and a viscosity of less than 42 mPas, may be mentioned: volatile hydrocarbon oils containing from 8 to 16 carbon atoms , linear or branched, and mixtures thereof and in particular C8-C16 branched alkanes such as isoalkanes (also called isoparaffins) C8-C16, isododecane, isohexadecane and for example the oils sold under the trade names of Isopars or of Permethyls, volatile silicone oils such as linear, branched or cyclic silicone oils having a viscosity at ambient temperature of less than 8 mm 2 / s and having in particular from 2 to 7 silicon atoms, these silicones optionally comprising alkyl groups or alkoxy having from 1 to 10 pendent carbon atoms or at the end of each silicone. As volatile silicone oil that can be used in the invention, mention may be made in particular of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyletyltrisiloxane, hexamethylisiloxane, octamethyltrisiloxane and decamethyl. tetrasiloxane, dodecamethyl pentasiloxane and their mixtures, non-volatile oils such as hydrocarbon-based oils of mineral or synthetic origin, such as linear or branched hydrocarbons, such as liquid petroleum jelly, isoeicosane or hydrogenated polyisobutene such as Parleam marketed by the company NIPPON OIL FATS, squalane of synthetic or vegetable origin, synthetic esters of formula R1000R2 in which RI represents the residue of a linear or branched higher fatty acid having from 1 to 25 carbon atoms and R2 represents a branched hydrocarbon chain containing from 1 to 24 carbon atoms , such as isopropyl myristate, isopropyl palmitate, isopropyl stearate, 2-ethylhexyl palmitate, 2-octyl dodecyl stearate, isodecyl neopentanoate, isononanoate, isononyl, isopropyl isostearate, isotridecyl isononanoate, isostearyl neopentanoate, octyldodecyl neopentanoate, C12-C15 alcohol benzoate, - polyol esters such as diethyl-2 neopentyl glycol hexanoate, glyceryl triheptanoate or triglycerides of caprylic / capric acids such as that sold under the name Myritol 318 by the company Cognis; polyacid esters such as diisopropyl adipate and diethyl adipate; 2 hexyl, - hydroxylated esters such as C12-C13 alcohol lactate, - ethers such as dicaprylyl ether, - silicone oils such as linear polydimethylsiloxanes (PDMS), optionally phenylated such as phenyltrimethicones, fluosilicones orées, and their mixtures. The oily phase having a surface tension of less than 33 mN / m and a viscosity of less than 42 mPas may especially be present in a content ranging from 1% to 90% by weight relative to the total weight of the composition, preferably from 2 to % to 80% by weight and still more preferably from 3 to 65% by weight.

Waxes and pastes The fatty phase of the composition according to the invention may also comprise at least one wax, at least one gum and / or at least one pasty fatty substance, of vegetable, animal, mineral or synthetic origin, silicone or not .

For the purposes of the present invention, the term "wax" means a lipophilic fat compound, solid at room temperature (25 ° C.), with a reversible solid / liquid state change, having a melting point greater than 30 ° C. and up to at 200 ° C, a hardness greater than 0.5 MPa, and having in the solid state an anisotropic crystalline organization. By bringing the wax to its melting temperature, it is possible to render it miscible with oils and to form a homogeneous mixture microscopically, but by bringing the temperature of the mixture to room temperature, a recrystallization of the wax in the oils of the mixed. For the purposes of the present invention, the waxes may be hydrocarbon-based, silicone-based and / or fluorinated, optionally comprising ester or hydroxyl functions. They are of natural origin, such as beeswax, Carnauba wax, Candelilla wax, Ouricoury wax, Japan wax, cork fiber or sugar cane wax, ceresin, paraffin waxes, lignite, microcrystalline waxes, lanolin wax, montan wax, ozokerites, hydrogenated oils such as hydrogenated jojoba oil or copolymerization of ethylene, waxes obtained by Fischer-Tropsch synthesis, esters of fatty acids and glycerides concretes at 45 ° C, silicone waxes such as alkyl, alkoxy and / or poly (di) methylsiloxane esters solid at 45 ° C, having from 10 to 45 carbon atoms, certain fatty acids such as stearic, myristic, or behenic acid, and mixtures thereof.

The wax may represent from 0.01 to 20% by weight, especially from 0.1 to 10% by weight, relative to the total weight of the composition. According to one embodiment, the composition may be free of waxes.

For the purposes of the invention, the term "pasty compound" means a compound having a melting point ranging from 25 to 60 ° C., preferably from 30 to 45 ° C. and a hardness ranging from 0.001 to 0.5 MPa, preferably from 0.005 to 0.4 MPa. As an example of pasty fatty substance, mention may be made of PDMSs having pendant chains of the alkyl or alkoxy type having from 8 to 24 carbon atoms, such as stearyl dimethicone and in particular those sold by Dow Corning under the references DC2503 or DCO5514; esters of fatty alcohol or of fatty acid having from 20 to 25 carbon atoms (a melting point of, for example, 20 to 35 ° C. and / or a viscosity at 40 ° C. of from 0.1 to 40 Pa. $) such as cholesteryl esters such as hydrogenated triglycerides of vegetable origin, for example the hydrogenated castor oil sold under the name Thixin R by Rheox, vinyl polylaurate, arachidyl propionate or triisostearyl gold. cetyl citrate, the PVP / Eicosene copolymer; isopropyl lanolines having a viscosity of 10 to 25 Pa.s, preferably 19 to 25 Pa.s and / or a melting point of 25 to 45 ° C and mixtures thereof. The composition of the invention may also comprise at least one alkyl, alkoxy or phenyldimethicone such as, for example, the product sold under the name Abil wax 2440 by the company GOLDSCHMIDT.

40 Powdery phase

The composition of the assembly according to the invention may comprise a pulverulent phase comprising pigments, pearlescent agents and / or fillers.

By pigments, it is necessary to include particles, mineral or organic, insoluble in the liquid organic phase, intended to color and / or opacify the composition.

The pigments may be inorganic or organic pigments. As pigments, it is possible to use metal oxides such as iron oxides (in particular those of yellow, red, brown or black color), titanium dioxides, cerium oxide, zirconium oxide and chromium oxide. ; manganese violet, blue ultramarine, prussian blue, ultramarine blue, ferric blue and mixtures thereof. It is preferable to use pigments of iron oxides and / or titanium dioxide.

The pigments can be treated with a hydrophobic agent to make them compatible with the organic phase of the composition. The hydrophobic treatment agent may be chosen from silicones such as methicones, dimethicones and perfluoroalkylsilanes; fatty acids such as stearic acid; metallic soaps such as aluminum dimyristate, hydrogenated tallow glutamate aluminum salt, perfluoroalkyl phosphates, perfluoroalkyl silanes, perfluoroalkyl silazanes, hexafluoropropylene polyoxides, polyorganosiloxanes comprising perfluoroalkyl perfluoropolyether groups, amino acids ; N-acyl amino acids or their salts; lecithin, isopropyl trisostearyl titanate, and mixtures thereof. The N-acyl amino acids may comprise an acyl group having from 8 to 22 carbon atoms, for example a 2-ethyl hexanoyl, caproyl, lauroyl, myristoyl, palmitoyl, stearoyl or cocoyl group. The salts of these compounds may be aluminum, magnesium, calcium, zirconium, zin, sodium or potassium salts. The amino acid can be for example lysine, glutamic acid, alanine.

The term alkyl mentioned in the compounds mentioned above denotes in particular an alkyl group having from 1 to 30 carbon atoms, preferably having from 5 to 16 carbon atoms. Hydrophobic-treated pigments are described in particular in application EP-A-1086683.

The pigments may be present in the composition according to the invention in a content ranging from 0.1 to 30% by weight, relative to the total weight of the composition, in particular ranging from 1% to 20% by weight, and more preferably ranging from 3% to 15% by weight.

In addition to the pigments, the pulverulent phase of the composition according to the invention may comprise fillers and / or nacres.

According to a preferred embodiment, the composition according to the invention may comprise fillers.

By fillers, it is necessary to include particles of any form, colorless or white, mineral or synthetic, insoluble in the medium of the composition regardless of the temperature at which the composition is manufactured.

The fillers can be mineral or organic of any shape, platelet, spherical or oblong, irrespective of the crystallographic form (for example sheet, cubic, hexagonal, orthorhombic, etc.). Mention may be made of talc, mica, silica, kaolin, polyamide (nylon) powders, poly-6-alanine powders, polyethylene powders, methyl polymethacrylates and powders. polyurethane such as the copolymer powder of hexamethylene diisocyanate and trimethylol hexyl lactone sold under the names PLASTIC POWDER D-400 by TOSHIKI, tetrafluoroethylene polymer powders (Teflon), micronized wax particles including microwaxes of Carnauba such as those marketed under the name of MicroCare 350 by the company MICRO POWDERS, synthetic wax microwaxes such as those marketed under the name MicroEase 1145 by the company MICRO POWDERS, the microwaxes consisting of a mixture of Carnauba wax and polyethylene wax such as those sold under the names MicroCare 300 and 310 by the company was MICRO POWDERS, microwaxes consisting of a mixture of Carnauba wax and synthetic wax such as those sold under the name MicroCare 325 by the company MICRO POWDERS, polyethylene microwires such as those sold under the names of MicroPoly 200, 220, 220L, and 2505, by the company MICRO POWDERS, and those marketed under the name of CERAPURE H5-C by the company SHAMROCK, or polypropylene microwaxes such as those sold under the name MATTEWAX by the company MICRO POWDERS; lauroyl-lysine, starch, boron nitride, polymeric hollow microspheres such as those of polyvinylidene chloride / acrylonitrile such as Expancel (Nobel Industrie), acrylic acid copolymers, silicone resin powders, in particular silsesquioxane powders (powders of silicone resin, in particular described in patent EP 293795, Toshiba's Tospearls, for example), elastomeric polyorganosiloxane particles, precipitated calcium carbonate, magnesium carbonate and magnesium carbonate , hydroxyapatite, hollow silica microspheres, glass or ceramic microcapsules, metal soaps derived from organic carboxylic acids containing from 8 to 22 carbon atoms, preferably from 12 to 18 carbon atoms, for example zinc, magnesium or lithium stearate, zinc laurate, magnesium myristate; barium sulphate and their mixtures.

According to a preferred embodiment, the composition according to the invention may comprise a polytetrafluoroethylene (PTFE) powder, a polyamide (nylon) powder or a mixture thereof. The fillers may be present in the composition according to the invention in a total content ranging from 0.1% to 20% by weight, relative to the total weight of the composition, preferably ranging from 0.2% to 15% by weight. and preferably ranging from 0.5% to 10% by weight.

In addition to the pigments and fillers, the particulate phase of the composition according to the invention may comprise nacres.

By nacres, it is necessary to include iridescent particles, in particular produced by certain shellfish in their shell or else synthesized, insoluble in the medium of the composition.

The nacres may be chosen from white pearlescent pigments such as bismuth oxychloride, titanium-coated mica, or bismuth oxychloride, colored pearlescent pigments such as titanium mica with iron oxides, titanium mica with especially ferric blue or chromium oxide, titanium mica with an organic pigment of the aforementioned type as well as pearlescent pigments based on bismuth oxychloride. According to one preferred embodiment, the pulverulent phase of the composition according to the invention may represent less than 30% by weight, relative to the total weight of the composition, and in particular from 0.1 to 10% by weight. 30% by weight, preferably 1 to 25% by weight and more preferably 3 to 20% by weight.

Aqueous phase

The composition according to the invention may comprise an aqueous phase comprising water.

The water may be floral water such as cornflower water and / or mineral water such as VITTEL water, LUCAS water or LA ROCHE POSAY water and / or thermal water.

The aqueous phase of the composition may also comprise organic solvents which are miscible with water at room temperature (25 ° C.), for example monoalcohols having from 2 to 6 carbon atoms, such as ethanol or isopropanol; the polyols having in particular 2 to 20 carbon atoms, preferably having 2 to 10 carbon atoms, and preferably having 2 to 6 carbon atoms, such as glycerol, propylene glycol, butylene glycol, pentylene glycol hexylene glycol, dipropylene glycol, diethylene glycol; glycol ethers (having in particular from 3 to 16 carbon atoms) such as the mono, di or tripropylene glycol (C1-C4) alkyl ethers, the mono, di or triethylene glycol (C1-C4) alkyl ethers; , and their mixtures.

The aqueous phase may further comprise stabilizing agents, for example sodium chloride, magnesium dichloride and magnesium sulfate.

The aqueous phase may also comprise any water-soluble or water-dispersible compound compatible with an aqueous phase such as gelling agents, film-forming polymers, thickeners, surfactants, water-soluble active agents and mixtures thereof. According to a preferred embodiment, the composition according to the invention comprises less than x% by weight of gelling agents and / or thickeners. According to a more preferred embodiment, the composition according to the invention is free of gelling agents and / or thickeners.

The aqueous phase (water and optionally the organic solvent (s) miscible (s) water) may be present in a content ranging from 5% to 70% by weight, in particular ranging from 10% at 50% by weight, and in particular ranging from 15% to 40% by weight relative to the total weight of the composition.

40 Dyes

The composition according to the invention may, in addition, comprise at least one soluble dye. The soluble dye may be selected from water-soluble dyes, fat-soluble dyes, and mixtures thereof.

The dyes that can be used in the compositions according to the invention are "direct dyeing systems", that is to say coloring agents or mixture of coloring agents which, as soon as they come into contact with the makeup support, usually the skin, instantly provide an associated coloring effect.

Are thus excluded from this definition, the compounds which have a delayed staining action on human skin in the image of derivatives having a ketone group such as hydroxymethylketones and in particular dihydroxyacetone (DHA) and also methylglyoxane. Indeed, as opposed to the direct dyeing system according to the invention, these compounds cause a non-immediate color effect.

The water-soluble dyes according to the invention may be of natural or synthetic origin, of vegetable or animal origin, in particular natural origin of plant origin.

As an illustration of the natural water-soluble coloring agents that can be used according to the invention, mention may be made of caramel, beetroot juice and carmine, betanin (beet), copper chlorophyllin and methylene blue. anthocyanins (enocianin, black carrot, hibiscus, elderberry) and riboflavin. Synthetic water-soluble dyes are, for example, FDC Red 4, DC Red 6, DC Red 22, DC Red 28, DC Red 30, DC Red 33, DC Orange 4, DC Yellow 5, DC Yellow 6, DC Yellow 8, FDC Green 3, DC Green 5, FDC Blue 1.

The fat-soluble natural dyes that may be used in the compositions according to the invention may be chosen from Sudan red, [3-carotene, carotenoids, lycopene, palm oil, annatto, Sudan brown, quinolinic yellow xanthophylls (capsanthin, capsorubine, lutein), and curcumin. As an example of a synthetic coloring agent, mention may be made of fat-soluble, synthetic dyes such as, for example, DC Red 17, DC Red 21, DC Red 27, DC Green 6, DC Yellow 11, DC Violet 2 and the Orange DC 5.

As another natural coloring agent that may be suitable for the present invention, there may be mentioned more particularly anthocyanins of flowers or fruits or their derivatives, flavonoids and tannins extracted from native or fermented plants, juglone, lawsone, extracts of fermented soybean, algae, fungi, microorganisms, unsubstituted Flavylium salts in position 3 as described in patent EP 1 172 091, extracts of Gesneria Fulgens, Blechum Procerum, Saxifraga and pigments susceptible of be obtained by extraction with an organic or hydro-organic solvent of a micromycete culture medium of the Monascus Monascus type. The hydro or liposoluble dye (s) may be present in the composition according to the invention in a content ranging from 0.001 to 3% by weight relative to the total weight of the composition, in particular from 0.01 to 2% by weight, and more particularly from 0.025 to 1% by weight.

additives

The composition according to the invention may comprise at least one other usual cosmetic ingredient that may be chosen in particular from antioxidants, perfumes, preservatives, neutralizers, surfactants, sunscreens, vitamins, moisturizers, anti-wrinkle active agents, emollients, hydrophilic or lipophilic active agents, anti-free radical agents, deodorant agents, sequestering agents, film-forming agents, and mixtures thereof.

Galenics The composition according to the invention may be in various liquid dosage forms.

For example, it may be in the form of an oil-in-water, water-in-oil or multiple emulsion, an aqueous or hydroalcoholic solution and even in biphasic form. According to a preferred embodiment, the composition according to the invention has an oily continuous phase, in particular an oily continuous phase having a viscosity of less than 42 mPas in particular ranging from 1 to 36 mPas, preferably from 1 to 25 mPas, and more preferably still from 1 to 20 mPas and a surface tension of less than 33 mN / m, preferably less than 30 mN / m and more preferably less than 25 mN / m. According to a preferred embodiment, the composition according to the invention is in the form of a water-in-oil emulsion.

The spray composition may be a foundation, a self-tanner, a body or face lotion, a styling agent containing product, a sunscreen product. The invention is presented in more detail in the examples below. 30 EXAMPLES

Example 1: Spray a liquid foundation

A foundation was prepared having the following composition:% by weight Bis-PEG / PPG-14/14 dimethicone in 1.44 Al Cyclopentasiloxane sold under the reference ABIL EM 97 by the company Goldschmidt 0.48 30 20 35 IMWITOR 780 K by the company SASOL Butyl paraben 0.20 Cyclopentasiloxane 52.40 A2 Hectorite modified di stearyl dimethyl ammonium sold 0.48 under the reference Bentone 38 VCG by the company ELEMENTIS Cyclopentasiloxane 5.00 Yellow iron oxide coated with stearoyl glutamate 2.24 aluminum oxide Yellow iron oxide coated with stearoyl glutamate 0.51 aluminum A3 iron oxide black coated with stearoyl glutamate 0.45 aluminum titanium dioxide coated with stearoyl glutamate 6.80 aluminum A4 PTFE 1.10 Nylon powder 12 0.90 Demineralized water 24.20 Methyl paraben 0.20 B Magnesium sulphate 0.56 Phenoxy ethanol 0.40 Octane 1-2 diol 0.24 Glycerol 2.40 TOTAL 100% Procedure The phase is prepared Al by weighing the three constituents and heating the mixture up to 75 ° C so as to obtain a clear medium and then at room temperature is added A2 by stirring with Moritz at 1500 rpm. Phase A3 is prepared separately by grinding the pigments with the tri-roll and then it is added with stirring to the preceding mixture. Phase A4 is then added while maintaining stirring. To prepare the aqueous phase, the constituents of phase B are weighed and boiled. The emulsion is at room temperature. The two phases must then have a temperature close to ambient. The aqueous phase is poured into the fatty phase by gradually increasing the stirring speed of the Moritz up to 2500 revolutions / min.

After addition it is left to stir for 10 minutes at room temperature.

Measurement of viscosity The viscosity of the foundation is measured at 25 ° C, with a Rheomat 180 viscometer equipped with the mobile MK-R2 and measuring cup MB-R2 with a volume of 60 ml, at a rotation speed of 200 min. -1, the measurement being performed after 10 minutes of rotation (time after which there is a stabilization of the viscosity and the rotational speed of the mobile).

The viscosity of the composition of Example 1, measured according to this protocol, is 125 mPas. Spray tests The composition of Example 1 was sprayed on half of a face by means of the spraying device of said composition, comprising a sonotrode (82) of longitudinal axis X, coupled to a piezoelectric transducer, this sonotrode being fed in composition via a channel opening on the X axis on an end flange (140) defining an ejection surface (4) of product particles, the flange being adapted to bend under the effect of the vibrations of the sonotrode to spray the composition as droplets, as described on page 5, line 19 to page 20, line 28.

On the other half of the face the same composition is applied to the fingers.

We then compare the approval to the application and the make-up result of the two modes of application:

Spraying the product provides a feeling of very pleasant lightness that is not felt with the application to the fingers and the resulting makeup result is natural and does not require touching the fingers.

Spraying also helps to avoid getting your hands dirty.

EXAMPLE 2 Spray of a Liquid Foundation A foundation was prepared having the following composition:

% by weight Cetyl PEG / PPG-10/1 dimethicone sold under the reference 1.44 ABIL EM 90 by the company Goldschmidt Al Polyglyceryl 4 isostearate sold under the reference 0,48 ISOLAN GI 34 by the company Goldschmidt Cyclopentasiloxane 46,60 modified Hectorite di stearyl dimethyl ammonium sold as 0.48 A2 under the reference Bentone 38 VCG by the company ELEMENTIS Cyclopentasiloxane 5.00 Yellow iron oxide coated with stearoyl glutamate 2.24 of aluminum A3 Yellow iron oxide coated with stearoyl glutamate 0.51 aluminum Black iron oxide coated with stearoyl glutamate 0.45 aluminum Titanium dioxide coated with stearoyl glutamate Aluminum 6.80 A4 PTFE 1.10 Nylon powder 12 0.90 Demineralized water 30.68 Magnesium sulphate 0.56 B Phenoxy ethanol 0.12 Octane 1-2 diol 0.24 Glycerol 2.40 TOTAL 100% Procedure The constituents of phase Al are weighed into the main beaker and then A2 is added with stirring to the Moritz at 1500 rpm. at room temperature iante.

Phase A3 is prepared separately by grinding the pigments with the tri-roll and then it is added with stirring to the preceding mixture. Phase A4 is then added while maintaining stirring. To prepare the aqueous phase, the constituents of phase B are weighed and boiled.

The emulsion is at room temperature. The two phases must then have a temperature close to ambient. The aqueous phase is poured into the fatty phase by gradually increasing the stirring speed of the Moritz up to 2500 rpm. After addition it is left to stir for 10 minutes at room temperature.

Viscosity Measurement The viscosity of the composition of Example 2, measured according to the previous protocol, is 93 mPas.

Spray tests The composition of Example 2 was sprayed on half of a face by means of the spraying device of said composition, comprising a sonotrode (82) of longitudinal axis X, coupled to a piezoelectric transducer, this sonotrode being fed in composition via a channel opening on the X axis on an end flange (140) defining an ejection surface (4) of product particles, the flange being adapted to bend under the effect of the vibrations of the sonotrode to spray the composition as droplets, as described on page 5, line 19 to page 20, line 28.

On the other half of the face the same composition is applied to the fingers. We then compare the approval to the application and the make-up result of the two modes of application:

The same approval is obtained for the application and the same make-up result as for Example 1.30. EXAMPLE 3 Spray of a liquid foundation A foundation was prepared having the following composition:% by weight Bis-PEG / PPG-14/14 dimethicone in 1.44 Al Cyclopentasiloxane sold under the reference ABIL EM 97 by the company Goldschmidt Isostearyl diglyceryl succinate sold under the reference 0.48 IMWITOR 780 K by the company SASOL Cyclopentasiloxane 47.60 A2 Hectorite modified di stearyl dimethyl ammonium sold 0.48 under the reference Bentone 38 VCG by the company ELEMENTIS Cyclopentasiloxane 5.00 Yellow iron oxide coated with stearoyl glutamate 2.24 of aluminum yellow iron oxide coated with stearoyl glutamate 0.51 aluminum A3 oxide black iron coated with stearoyl glutamate 0.45 aluminum titanium dioxide coated with stearoyl glutamate 6.80 aluminum A4 PTFE 1.10 nylon powder 12 0.90 demineralized water 19.80 B magnesium sulphate 0.56 Octane 1-2 diol 0.24 Glycerol 2.40 C Ethanol 10.00 TOTAL 100% Procedure The constituents of phase Al are weighed into the main beaker and then A2 is added with stirring to the Moritz at 1500 rpm, maintaining ambient temperature. Phase A3 is prepared separately by grinding the pigments with the tri-roll and then is added with stirring to the above mixture. Phase A4 is then added while maintaining stirring. To prepare the aqueous phase, the constituents of phase B are weighed and boiled. The emulsion is at room temperature. The two phases must then have a temperature close to ambient. The aqueous phase is poured into the fatty phase, increasing as the stirring speed of the Moritz increases up to 2500 rpm. After addition, the mixture is stirred for 10 minutes and then phase C is added at room temperature.

Measurement of viscosity The viscosity of the foundation is measured at 25 ° C, with a Rheomat 180 viscometer equipped with the mobile MK-R2 and measuring cup MB-R2 with a volume of 60 ml, at a rotation speed of 200 min. -1, the measurement being performed after 10 minutes of rotation (time after which there is a stabilization of the viscosity and the rotational speed of the mobile).

The viscosity of the composition of Example 3, measured according to this protocol, is 80 mPas.

Spray tests The composition of Example 3 was sprayed on half of a face by means of the spraying device of said composition, comprising a sonotrode (82) of longitudinal axis X, coupled to a piezoelectric transducer, this sonotrode being fed in composition via a channel opening on the X axis on an end flange (140) defining an ejection surface (4) of product particles, the flange being adapted to bend under the effect of the vibrations of the sonotrode to spray the composition as droplets, as described on page 5, line 19 to page 20, line 28.

On the other half of the face the same composition is applied to the fingers.

We then compare the approval to the application and the make-up result of the two modes of application:

The same approval is obtained for the application and the same makeup result as for Examples 1 and 2.

Example 4 Spray a liquid foundation

A liquid foundation having the following composition was prepared:

% by weight of Cetyl PEG / PPG-10/1 dimethicone sold under the reference 1.44 ABIL EM 90 by the company Goldschmidt Al Polyglyceryl 4 isostearate sold under the reference 0.48 ISOLAN GI 34 by the company Goldschmidt Isododecane 33.10 modified Hectorite di stearyl dimethylammonium sold as 0.48 A2 under the reference Bentone 38 VCG by the company ELEMENTIS A3 Isododecane 5.00 2.24 vAyut u ~ iUi j auil, LdIIUUL Ut., iUaiuy1 iuiaiiiaw of aluminum Yellow iron oxide coated with stearoyl glutamate 0.51 aluminum oxide black iron oxide coated with stearoyl glutamate 0.45 aluminum titanium dioxide coated with stearoyl glutamate 6.80 aluminum A4 PTFE 1.10 nylon powder 12 0.90 demineralized water 34.3 B Magnesium sulphate 0.56 Octane 1-2 diol 0.24 Glycerol 2.40 C Ethanol 10.00 TOTAL 100% Procedure The constituents of phase Al are weighed in the main beaker and then A2 is added with stirring to the Moritz at 1500 rpm keeping at room temperature.

Phase A3 is prepared separately by grinding the pigments with the tri-roll and then it is added with stirring to the preceding mixture. Phase A4 is then added while maintaining stirring. To prepare the aqueous phase, the water is boiled and then the other constituents of phase B are added.

The emulsion is at room temperature. The two phases must then have a temperature close to ambient. The aqueous phase is poured into the fatty phase by gradually increasing the stirring speed of the Moritz up to 2500 rpm. After the addition, the mixture is stirred for 10 minutes and the ethanol is then added at room temperature. Viscosity Measurement The viscosity is measured at 25 ° C., with a Rheomat 180 viscometer equipped with the mobile MK-R2 and measuring cup MB-R2 with a volume of 60 ml, at a speed of rotation of 200 min-1. the measurement being carried out after 10 minutes of rotation (at the end of which a stabilization of the viscosity and the speed of rotation of the mobile) is observed.

The viscosity of the composition of Example 1, measured according to this protocol, is 45 mPas. Spray tests The composition of Example 4 was sprayed on half of a face by means of the spraying device of said composition, comprising a sonotrode (82) of longitudinal axis X, coupled to a piezoelectric transducer, this sonotrode being fed in composition via a channel opening along the X axis on an end flange (140) defining an ejection surface (4) of product particles, the collar being able to flex under the effect of the vibrations of the sonotrode so as to spray the composition in the form of droplets, as described on page 5, line 19 to page 20, line 28.

On the other half of the face the same composition is applied to the fingers. We then compare the approval to the application and the make-up result of the two modes of application:

The same approval is obtained for the application and the same makeup result as for the 10 examples 1 and 2.5

Claims (31)

claims A cosmetic assembly comprising: i) a cosmetic or dermatological composition comprising a physiologically acceptable medium and contained inside a reservoir, said composition being liquid and having a viscosity greater than or equal to 10 mPa.s; and ii) a device for spraying said composition, comprising a sonotrode (82), coupled to a piezoelectric transducer, this sonotrode being traversed at least in part by a channel that can be placed in communication with the composition in the reservoir and opening onto a end flange (140) defining an ejection surface (4) of the composition in the form of droplets, the channel opening onto the non-zero distance ejection surface of a peripheral edge of the flange, the latter being suitable to bend under the effect of vibrations of the sonotrode so as to spray the composition in the form of droplets. 2. Cosmetic assembly according to claim 1 characterized in that the sonotrode is of longitudinal axis X, said channel opening on the ejection surface along said axis X. 3. Cosmetic assembly according to any one of the preceding claims, characterized in that the thickness (e) of the flange is between 0.4 mm and 0.6 mm. 4. Cosmetic assembly according to the preceding claim, the thickness (e) of the flange is between 0.45 mm and 0.55 mm. 5. Cosmetic assembly according to any one of the preceding claims, the collar (140) having a circular contour. 6. Cosmetic assembly according to any one of the preceding claims, the largest diameter (D7) of the collar being between 7 and 13mm. 7. Cosmetic assembly according to any one of the preceding claims, the larger diameter ratio (D of the flange / thickness (e) of the collar being between 12 and 32. 35 8. Cosmetic assembly according to any one of the preceding claims, the ejection surface (4) being flat at rest. 9. Cosmetic assembly according to any one of the preceding claims, the ejection of the product particles taking place over the entire surface of the collar. 10. Cosmetic assembly according to any one of the preceding claims, the maximum total amplitude of vibration of the ejection surface (4) being greater than or equal to 10 m, in particular between 10 and 50 m. 45 11. Cosmetic assembly according to any one of the preceding claims, the ejection surface (4) vibrating taking alternately a concave and convex shape. 40 12. Cosmetic assembly according to any one of the preceding claims, the frequency being between 30 kHz and 200 kHz, better 100 kHz +/- 10%. 13. Cosmetic assembly according to any one of the preceding claims, the flange having a greater transverse dimension less than or equal to 2'4, where 2 is the wavelength in the sonotrode material of the ultrasonic wave. 14. Cosmetic assembly according to any one of the preceding claims, the length of the sonotrode between the face of the sonotrode in contact with a transducer coupled to the sonotrode and the ejection surface being less than or equal to 2. 15. Cosmetic assembly according to any one of the preceding claims, the sonotrode being aluminum. 16. Cosmetic assembly comprising: i) a cosmetic or dermatological composition comprising a physiologically acceptable medium and contained inside a reservoir, said composition being liquid and having a viscosity greater than or equal to 10 mPa.s; and ii) a device for spraying said composition, comprising a sonotrode (82) and a piezoelectric transducer coupled to the sonotrode, this sonotrode being traversed at least in part by a channel that can be placed in communication with the composition in the reservoir and opening on an end collar (140) defining an ejection surface (4) of the composition in the form of droplets, the channel opening onto the non-zero distance ejection surface of a peripheral edge of the collar, the sonotrode also comprising a portion of decreasing diameter extended by a cylindrical portion (132) connecting to the end flange, the diameter ratio (D7) of the flange / diameter (DI) of the cylindrical portion being between 12 and 32. 17. Cosmetic assembly according to the preceding claim, characterized in that the sonotrode is of longitudinal axis X, said channel opening on the ejection surface along said axis X. 18. Cosmetic assembly according to any one of the preceding claims, characterized in that the composition has a viscosity ranging from 10 to 400 mPa.s and more preferably from 20 to 150 mPa.s and even more preferably from 50 at 100 mPa.s. 19. Cosmetic assembly according to any one of the preceding claims, characterized in that the cosmetic composition comprises an oily phase having a surface tension of less than 33 mN / m, and a viscosity of less than 42 mPas, in particular ranging from 1 to 36 mPas preferably from 1 to 25 mPas, and more preferably from 1 to 20 mPas. 20. Cosmetic assembly according to the preceding claim, characterized in that the oily phase comprises at least one oil chosen from: volatile hydrocarbon oils having 8 to 16 carbon atoms, linear or branched , and mixtures thereof, volatile silicone oils such as linear, branched or cyclic silicone oils having a viscosity at room temperature of less than 8 mm 2 / s and in particular having from 2 to 7 silicon atoms, these silicones optionally containing alkyl groups. or alkoxy having from 1 to 10 pendent carbon atoms or at the end of each silicone, - non-volatile oils such as hydrocarbon oils of mineral or synthetic origin, - synthetic esters of formula R1COOR2 in which R represents the residue of a linear or branched higher fatty acid having from 1 to 25 carbon atoms and R2 represents a branched hydrocarbon chain containing from 1 to 24 carbon atoms, polyol esters such as neopentyl glycol di-2-hexanoate, glyceryl triheptanoate or triglycerides of capiylic / capric acids, polyacid esters, hydroxylated esters, ethers, - Silicone oils such as linear polydimethylsiloxanes (PDMS), optionally phenyl such as phenyltrimethicones, fluorinated silicones, and mixtures thereof. 21. Cosmetic assembly according to any one of claims 19 or 20, characterized in that the oily phase has a surface tension of less than 33 mN / m, and a viscosity of less than 42 mPas is present in a content ranging from 1% to 90% by weight relative to the total weight of the composition, preferably from 2% to 80% by weight and still more preferably from 3 to 65%. 22. Cosmetic assembly according to any one of the preceding claims, characterized in that the composition comprises a pulverulent phase comprising pigments, nacres and / or fillers. 23. Cosmetic assembly according to the preceding claim, characterized in that the pigments are present in a content ranging from 0.1 to 30% by weight, relative to the total weight of the composition, in particular ranging from 1% to 20% by weight. weight, and more preferably ranging from 3% to 15% by weight. 24. Cosmetic assembly according to any one of the preceding claims, characterized in that it comprises at least one soluble dye. 25. Cosmetic assembly according to the preceding claim, characterized in that the soluble dye or dyes are present in a content ranging from 0.001 to 3% by weight relative to the total weight of the composition, in particular from 0.01 to 2% by weight. and more particularly from 0.025 to 1% by weight. 26. Cosmetic assembly according to any one of claims 24 or 25, characterized in that the dyes are chosen from water-soluble, liposoluble dyes and mixtures thereof. 27. Cosmetic assembly according to the preceding claim, characterized in that water-soluble dyes are chosen from caramel, beet juice and carmine, betanin (beet), copper chlorophyllin, methylene blue, anthocyanins (enocianine, carrot). black, hibiscus, elderberry) and riboflavin, FDC Red 4, DC Red 6, DC Red 22, DC Red 28, DC Red 30, DC Red 33, DC Orange 4, DC Yellow 5, DC Yellow 6, DC Yellow 8, FDC Green 3, DC Green 5, FDC Blue 1. 28. Cosmetic assembly according to claim 26, characterized in that liposoluble dyes are chosen from Sudan red, [3-carotene, carotenoids, lycopene, palm oil, annatto, Sudan brown, quinoline yellow. xanthophylls (capsanthin, capsorubin, lutein), and curcumin. As an example of a synthetic coloring agent, mention may be made of fat-soluble, synthetic dyes such as, for example, DC Red 17, DC Red 21, DC Red 27, DC Green 6, DC Yellow 11, DC Violet 2 and DC Orange 5, anthocyanins of flowers or fruits or their derivatives, flavonoids and tannins extracted from native or fermented plants, juglone, lawsone, extracts of fermented soy, seaweed, mushrooms, microorganisms, unsubstituted Flavylium salts in position 3 as described in patent EP 1 172 091, extracts of Gesneria Fulgens, Blechum Procerum, Saxifraga and pigments that can be obtained by extraction with an organic or hydro solvent -organic culture medium of micromycetes monascus type Monascus. 29. Cosmetic assembly according to any one of the preceding claims, characterized in that the composition is in the form of a water-in-oil emulsion. 30. A method of making up the skin comprising at least one step of spraying a cosmetic or dermatological composition by means of a cosmetic unit according to any one of claims 1 to 29. 31. Use of a cosmetic set according to any one of claims 1 to 29, for obtaining a deposit, especially makeup, homogeneous, natural and not marking the skin imperfections of relief.