WO2016092108A2

WO2016092108A2 - Deodorant aerosol equipped with a hollow dispensing head

Info

Publication number: WO2016092108A2
Application number: PCT/EP2015/079505
Authority: WO
Inventors: Fabienne Bouchard
Original assignee: L'oreal
Priority date: 2014-12-12
Filing date: 2015-12-11
Publication date: 2016-06-16
Also published as: EP3229922A2; RU2017124438A; WO2016092108A3; RU2017124438A3; FR3029754B1; FR3029754A1

Abstract

The present invention a device for dispensing a composition, comprising: i) a dispensing head (1) intended to be fitted on a container that contains said composition, said device comprising: - a body (3) that is open at its two opposite axial ends, - an engaging part (10) that is open at its two opposite axial ends, at least partially defining at least one dispensing orifice (12), the cross section of the dispensing orifice being between 0.05 mm² and 0.5 mm²; ii) the composition comprising, in particular in a physiologically acceptable medium: a) a continuous oily phase, and b) at least one deodorant active agent, and c) at least one pulverulent base comprising at least: 1) perlite particles, and 2) particles of lamellar filler other than perlite, and 3) optionally at least one fatty acid salt, and d) at least one propellant.

Description

Deodorant aerosol equipped with a hollow dispensing head

The present invention concerns a device for dispensing a composition, comprising:

i) a dispensing head (1 ) intended to be fitted on a container that contains said composition, said device comprising:

- a body (3) that is open at its two opposite axial ends,

- an engaging part (10) that is open at its two opposite axial ends, at least partially defining at least one dispensing orifice (12), the cross section of the dispensing orifice being between 0.02 mm² and 0.5 mm²,

ii) the composition comprising, in particular in a physiologically acceptable medium:

a) a continuous oily phase, and

b) at least one deodorant active agent, and

c) at least one pulverulent base comprising at least:

1 ) perlite particles, and

2) particles of lamellar filler other than perlite, and

3) optionally at least one fatty acid salt, and

d) at least one propellant.

The present invention also relates to a method for the cosmetic treatment of body odor and optionally of human perspiration, which consists in applying to the surface of a keratin material a composition dispensed by means of the dispensing device defined above.

Deodorant/antiperspirant aerosols are particularly desired by the consumer for their very good efficacy but they have a tendency to bring about stinging sensations or sometimes a feeling of dryness that may disturb the comfort of the user, especially in people with sensitive skin or who have shaved their armpits. They also have a tendency, in the presence of certain deodorant active agents, such as antiperspirant salts, to transfer onto clothing, leaving unsightly visible marks.

In the aerosol devices proposed to date for dispensing deodorant/antiperspirant products, many spray heads have been proposed, having one or several dispensing orifice(s). Numerous parameters should be taken into consideration when designing a spray head.

First of all, the spray generated should have the particle size distribution suitable for the application. In this respect, the size of the droplets should not be too small or too large.

Furthermore, the spray generated should be delivered at the flow rate required and the spray head should not subject the flow of product to an excessive pressure drop.

The form of the spray should likewise correspond to the intended application and thus make it possible, as the case may be, to cover a more or less extensive area. Finally, the spray head should be esthetically pleasing to the consumer, and its manufacture should be compatible with the requirements of large-scale production. Application EP 1 052 023 A1 discloses a spray head comprising a dispensing orifice defined between a closure member having a frustoconical part and the body of the head. The closure member is opened by deformation of the frustoconical part, under the pressure of the product during dispensing. A conical and hollow spray is formed at least in the vicinity of the head.

Application WO 201 1/065413 discloses various arrangements of spray heads in which a spray orifice is defined between a peripheral part and a central part which are connected together by bridges of material. The invention aims to propose an aerosol device with a dispensing head that is very particularly suitable for spraying a deodorant or antiperspirant product without the drawbacks mentioned above in particular of preventing or substantially reducing the stinging sensations or feelings of dryness. The invention also aims to propose an aerosol device with a spray head that produces a totally original visual effect with respect to that which exists currently.

The invention also aims to propose an aerosol device with a spray head that gives a sensation, on application, different from the sensations felt with the current devices.

Moreover, the spraying should be effective for the intended application.

In particular, in the field of deodorants or antiperspirants, spray heads are desired with which it is possible to precisely reach a given target.

There exists a need to increase the speed of application of a product by spraying without, however, increasing the risks of blockage related to the drying of the sprayed product.

The invention thus aims to further improve the known devices while making possible the use of manufacturing techniques having a cost compatible with large- scale distribution. In application EP 2 358 444 it was proposed to use expanded perlite particles in deodorant/antiperspirant products, in particular in aerosols, in order to effectively reduce the moisture produced by sweat. However, these perlite particles may lead to problems of blockage of the aerosol device.

There is also a need to be able to use a deodorant composition comprising perlite particles in an appropriate aerosol device without the drawbacks mentioned above, in particular the blockage problems. The applicant has surprisingly discovered that the various objectives mentioned above could be achieved by a device for dispensing a composition, comprising: i) a dispensing head (1 ) intended to be fitted on a container that contains said composition, said device comprising:

- a body (3) that is open at its two opposite axial ends,

a) a continuous oily phase,

b) at least one deodorant active agent, and

c) at least one pulverulent base comprising at least:

1 ) perlite particles, and

2) particles of lamellar filler other than perlite, and

3) optionally at least one fatty acid salt, and

d) at least one propellant.

The applicant has also discovered that the dispensing device and its composition made it possible, after application to the surface of the keratin material, and in particular of the skin, to limit the transfer onto and the whitening and/or graying effect on clothes brought about conventionally by certain deodorant active agents such as antiperspirant salts in deodorant compositions. This discovery forms the basis of the invention.

The present invention relates to a device for dispensing a composition, comprising:

1) a dispensing head (1 ) intended to be fitted on a container that contains said composition, said device comprising:

- a body (3) that is open at its two opposite axial ends,

a) a continuous oily phase, and

b) at least one deodorant active agent, and

c) at least one pulverulent base comprising at least:

1 ) perlite particles, and

2) particles of lamellar filler other than perlite, and

3) optionally at least one fatty acid salt, and

d) at least one propellant. The expression "continuous oily phase" is understood to mean either the oily phase of an anhydrous single-phase composition or else the oily phase of an emulsion in which an aqueous phase is dispersed, in particular a water-in-oil emulsion. For the purposes of the invention, the term "anhydrous" is understood to mean a composition having a total water content of less than 3.0% by weight relative to the total weight of the composition, and preferably having a water content of less than 1 % by weight relative to the total weight of the composition, or even that is free of water.

For the purposes of the present invention, the expression "physiologically acceptable medium" is understood to mean a medium that is suitable for the topical administration of a composition. A physiologically acceptable medium generally has no unpleasant odor or appearance, and is perfectly compatible with topical administration. In the present case, where the composition is intended for topical administration, i.e. by application at the surface of the keratin material under consideration, such a medium is considered in particular to be physiologically acceptable when it does not cause stinging, tightness or redness that is unacceptable to the user.

The expression "human keratin materials" is understood to mean the skin (of the body, underarms, feet), head hair, scalp and body hair.

The expression "deodorant active agent" is understood to mean any substance capable of reducing, masking or absorbing human body odors, in particular underarm odors. DISPENSING DEVICE

In particular, the dispensing orifice is preferably defined between the body and the engaging part but may, alternatively, be defined entirely by the engaging part. By virtue of the invention, a passage is formed through the dispensing head and more particularly through the body and the engaging part, allowing a flow of air to be established through the head when the product to be dispensed is emitted, and this can prove advantageous when the product is emitted in the form of a spray, allowing a current of air to be created through the head in order to accompany the flow of the spray.

In addition, the dispensing head has an appearance which contrasts clearly with the usual esthetics of known dispensing heads, and which proves to be particularly attractive to the consumer.

Furthermore, the passage through the head can be produced with dimensions sufficient to allow, if desired, a finger or a lock of hair to be inserted into this passage. This can make it easier to apply a product to the finger or the lock of hair.

If desired, the invention can also make it easier to produce a dispensing orifice having an annular section between the engaging part and the body, allowing the formation of a hollow spray. Alternatively, a plurality of dispensing orifices are formed between the body and the engaging part, for example in order to dispense the product in the form of a number of sprays or jets. The number of dispensing orifices may in particular be greater than or equal to 10, better still greater than or equal to 20, even better still greater than or equal to 30. The dispensing orifices each have for example a cross section greater than or equal to 0.003 mm², better still greater than or equal to 0.006 mm² and are preferably spaced apart from one another (measurement along a straight line between the barycenters of the orifices) by a distance of more than 1 mm. In another variant, several dispensing orifices are formed entirely in the engaging part. The orifices may be constructed in such a way that the jet exiting from each orifice swirls, especially by virtue of at least two swirl ducts oriented tangentially around the axis of the orifice. The engaging part may have a U-shaped axial half- section. The body may have two concentric mounting skirts between which the engaging part is fastened. The body may comprise a crown into which the engaging part is inserted, the crown possibly bearing one or more reliefs defining, with the engaging part, ducts, especially swirl ducts, for supplying the dispensing orifice. The body may define a housing that receives the engaging part, which is then called a core.

The one or more dispensing orifices may be open at rest. The expression "at rest" should be understood as meaning before the engaging part is exposed to the pressure of the product to be dispensed. Thus, in this case, one or more dispensing orifices are already formed and open when the product is sent into the head in order to be dispensed. Alternatively, the dispensing orifice is formed at the time the product is dispensed, by virtue for example of the elasticity of at least a portion of the body or of the engaging part, which deforms under the pressure of the product at the time it is dispensed.

By virtue of the invention, in the case of spraying, the spray can be emitted at a relatively high flow rate, if desired, while having a spray head which has a relatively simple design and functions reliably. In particular, the dispensing orifice may be produced with well-defined dimensions. In addition, the dispensing head may be esthetically pleasing to the consumer.

The body may have a first surface that flares toward the outside, or converges toward the outside, and the engaging part may have a second surface, opposite the first surface, that diverges toward the outside, or converges toward the outside. The first surface may be conical. The second surface may be conical, with the same angle as the first surface or with a greater or smaller angle.

A different angle that results in a narrowing of the space may lead to an acceleration of the jet before it exits, and this may be advantageous in the context of a spray. There may be one or more than one dispensing orifice and it may have an annular shape or some other shape. The dispensing orifice may have a constant width in the circumferential direction. The one or more dispensing orifices may be defined between two concentric surfaces of revolution, for example in the form of cylinders of revolution.

The one or more dispensing orifices may have axial symmetry, preferably rotational symmetry, in particular around the dispensing axis. The dispensing axis is defined by the general direction in which the product is dispensed by the head.

The engaging part is preferably attached, thereby making it, and the body, easier to manufacture. Alternatively, the engaging part is molded as one part with the body, in particular in the case of the dispensing of a foam, it then being possible for the dispensing orifice to have a larger section than in the case of the spraying of a spray.

The space formed between the body and the engaging part is supplied by at least one supply duct, the section of which is preferably greater than that of the dispensing orifice, thereby making it easier to fill this space before the product emerges through the dispensing orifice.

A product distribution chamber may advantageously be formed, between the engaging part and the body, upstream of the dispensing orifice. This can make the emission of a homogeneous spray, in particular, easier. The supply duct for the product may open into this chamber, which preferably has an annular shape. Its width, which corresponds to the gap between the engaging part and the body, is preferably greater than the maximum width of the passage, via which the distribution chamber communicates with the dispensing orifice. At least one of the body and the engaging part, preferably the body, may have at least one relief for centering the engaging part in relation to the body, and preferably at least ten, better still at least twenty, and even better still at least forty reliefs. These reliefs may extend as far as the edge of the part in which they are produced so as to generate a multitude of orifices via which jets of product exit, the centering reliefs especially being oriented parallel to the dispensing axis or obliquely in the same circumferential direction around the axis, and optionally also possibly defining, between one another, sectional narrowings that cause the jets of product to be accelerated. This or these reliefs are preferably located set back from the dispensing orifice when it is desired to generate a spray in the form of a single jet. The reliefs can be produced on the body, being for example in the form of axial ribs that are distributed regularly around the entire surface of the body opposite the engaging part.

The centering reliefs may optionally ensure alone that the engaging part is held on the body. Alternatively, the engaging part is fixed to the body somewhere other than in the region of the centering reliefs, it being possible in this case for the centering reliefs to have or not have a function of holding the engaging part on the body. Preferably, the engaging part is fixed in relation to the body. Alternatively, the engaging part is fixed in an adjustable manner in relation to the body, in order for example to allow the user to adjust the width of the dispensing orifice or to close the latter when not in use, for example by screwing it through a quarter turn, this screwing being accompanied by an axial movement of the engaging part in relation to the body.

The engaging part may lie flush with the front end of the body so as to generate a spray with an axis substantially parallel to the axis of the engaging part.

The engaging part may extend axially beyond the front end of the body by an amount lying between 0 and 1 mm, and better still between 0 and 0.5 mm. The spray may then diverge away from the axis of the engaging part.

The engaging part may be axially set back from the front end of the body by an amount lying between 0 and 1 mm, and better still between 0 and 0.5 mm. The spray may then converge toward the axis of the engaging part. Advantageously, the dispensing orifice has a triangular cross section.

More advantageously, the engaging part at least partially defines a plurality of dispensing orifices, the sum of the cross sections of the dispensing orifices being between 0.02 mm² and 0.5 mm².

More advantageously still, the number of dispensing orifices is greater than or equal to 5, preferably greater than or equal to 10.

Preferably, the cross section of the dispensing orifices is between 0.03 mm² and 0.4 mm², preferably between 0.05 mm² and 0.5 mm²and preferably between 0.05 mm² and 0.4 mm².

The invention makes it possible to easily produce, if desired, a dispensing orifice having a circular internal contour. The inside diameter of the passage formed through the head is for example greater than or equal to 10 mm, better still greater than or equal to 15 mm, 20 mm or 30 mm. When the passage does not have a circular section, the "inside diameter" designates the diameter of the largest circle inscribed in this passage. The head may comprise at least two housings and two engaging parts that are disposed in the housings and each define with the body, at rest, a dispensing orifice according to the invention. The dispensing axes may then be parallel or not parallel, intersecting or not intersecting, for example converging toward one another.

The dispensing orifice may have, in axial half section, an axis that converges or diverges in relation to the spraying direction. A further subject of the invention, according to another of its aspects, is a container provided with a dispensing head according to the invention.

The invention also relates to a device for dispensing a composition, said device comprising:

i) a dispensing head intended to be fitted on a container that contains said composition to be dispensed,

the dispensing head comprising:

- a body that is open at its two opposite axial ends,

- an engaging part that is open at its two opposite axial ends, at least partially defining a dispensing orifice, and

a) a continuous oily phase,

b) at least one deodorant active agent, and

c) at least one pulverulent base comprising at least:

1 ) perlite particles,

2) particles of lamellar filler other than perlite,

3) optionally a fatty acid salt, and

d) at least one propellant.

1) a dispensing head intended to be fitted on a container that comprises a valve rod or pump rod, the dispensing head comprising:

- a body provided with an end piece for connecting to the valve rod or pump rod,

- a part attached to the body, at least partially defining a dispensing orifice having an annular section at rest or several dispensing orifices distributed around a dispensing axis (Z);

the head not being a through-head along the dispensing axis (Z);

the body being closed along the dispensing axis (Z) and said part being of annular shape, or

the body having a through-opening along the dispensing axis (Z) and said part closing this opening;

a) a continuous oily phase, and

b) at least one deodorant active agent, and

c) at least one pulverulent base comprising at least:

1 ) perlite particles,

2) particles of lamellar filler other than perlite,

3) optionally a fatty acid salt, and

d) at least one propellant. The container may be a pressurized container, provided for example with a hollow valve rod inserted into a housing in the head that is suitable for holding said rod. The invention may be better understood from reading the following detailed description of non-limiting implementation examples thereof and from examining the appended drawing, in which:

figure 1 schematically shows a perspective view of an example of a dispensing head produced in accordance with the invention, before the engaging part is fitted on the body of the head,

figure 2 shows the dispensing head after the engaging part has been fitted in the body,

figure 3 is a view similar to figure 1 in partial section, - figures 4A to 4F illustrate various arrangements, among others, of the engaging part and the body,

figure 5 illustrates the possibility of producing the dispensing head with two dispensing orifices according to the invention,

figure 6 shows a front view of a dispensing head having concentric dispensing orifices,

figure 7 is an axial section through an embodiment variant of the engaging part,

figures 8A and 8B are various examples of configurations of the engaging part from figure 7 as a partial front view,

- figure 9 is a partial axial section through a variant embodiment of the dispensing orifice,

figures 10A and 10B are front views along X of various examples of configuration according to figure 9,

figure 1 1 is a view similar to figure 2 of an embodiment variant of the head,

figures 12A to 12C illustrate various examples of arrangements of the reliefs on the body,

figures 13A to 13C illustrate various examples of configurations of the engaging part with respect to the body,

- figure 14 is a partial axial section through an embodiment variant of the dispensing orifice,

figure 15 is a section along XV from figure 14,

figure 16 is an exemplary embodiment of the body according to figure 14, and

- figure 17 is a cutaway perspective view of an example of a dispensing head according to the configuration from figure 14.

In the drawing, the actual respective proportions of the various constituent elements have not always been respected, for the sake of clarity.

The dispensing head 1 shown in Figures 1 to 3 is intended to be fitted on a container (not shown) provided with a hollow valve rod or hollow pump rod, through which the product to be dispensed that is contained in the container is conveyed toward the head 1 .

The container may in particular be a pressurized container of the aerosol can type, containing a propellant gas such as compressed air, for example, or a liquefied gas. The container may be provided with a valve and the valve may be opened for example by pressing the hollow rod or alternatively by tilting the latter. When the container is provided with a pump, the pump may be actuated for example by pressing the hollow rod along its longitudinal axis.

The head 1 comprises a body 3 which may be produced in an integral manner by molding a single part or may comprise a plurality of elements produced separately and joined together.

The dispensing head 1 may comprise, as can be seen in Figure 2, a housing 6 intended to engage with the hollow rod in order to allow the product delivered through the latter to reach a supply duct 7 which opens into a housing 8 in the body 3. The housing 6 has a dimension adapted to the outside diameter of the rod, so as to obtain a sealed fit of the rod in the housing 6, in order that the product delivered through the rod passes entirely into the supply duct 7. The latter is for example coaxial with the rod of the container but could be oriented in some other way and have for example a plurality of differently oriented portions. An engaging part 10, called core in the following text when it is inside the body, is fixed in the housing 8 and defines for example with the body 3 a dispensing orifice 12 having an annular section, as illustrated.

The expression "annular section" should be understood within the meaning of the present invention as meaning any section that follows a closed contour, whether this contour is circular, elliptical, polygonal or some other shape.

Passing axially through the core 10 is an opening 90, the inside diameter D of which may be relatively large, for example greater than or equal to 10 mm, better still 15, 20 or 30 mm.

The opening 90 helps to give the head a particularly esthetic appearance. In addition, the opening 90 can allow air to flow through the head under the entrainment effect of a spray emitted through the dispensing orifice 12. This can help to increase the range of the spray and can increase the freshness effect provided thereby, if need be.

The opening 90 may also allow a finger or a lock of hair to be inserted through the head, and this can make it possible to apply a product in a single movement over the entire circumference of the element inserted through the head. This can be an advantage for applying for example an antiseptic or care product to a finger or for treating a lock of hair.

The dispensing axis Z may be perpendicular to the longitudinal axis X of the container on which the head is fitted, as illustrated.

The head 1 comprises a base 92 which defines a surface 4 which the user can press in order to bring about dispensing. The bottom of the base 92 can be extended by an enclosing skirt 93 which covers the upper part of the container. The housing 8 which receives the core 10 is defined by a crown 94 of axis Z, the lower side of which is joined to the base 92. The supply duct 7 passes through the base 92 and leads into the housing 8 at a distance from the axial ends, along the axis Z, of the crown 94, being preferably closer to the rear end 94a than to the front end 94b, as can be seen in Figure 2.

The body 3 may have, as illustrated, a shoulder 95 close to the rear end 94a, against which the core 10 can come into axial abutment, if need be, at the end of its fitting. The core 10 and the housing 8 may have annular surfaces 96 and 97, in sealed contact, in order to close the space formed between the core 10 and the body 3 at the rear of the supply duct 7.

Preferably, the circumferential width / of the dispensing orifice 12, around the spraying direction Z, is constant. If this width / varies, for example so as to take into account the possibly non-uniform pressure drop experienced by the flow of product upstream of the dispensing orifice 12, this does not depart from the scope of the present invention. This non-uniform pressure drop results for example from the geometry of the space between the core and the body, in particular the presence of angles or intersections. By varying the width /, it is possible to ensure that the product can emerge more easily at the point where this pressure drop is greatest, if a spray which is as homogeneous as possible is desired.

The width / of the dispensing orifice is for example between 0.01 mm and 2 mm.

The core 10 can be fixed to the body 3 in various ways. In the example illustrated in figures 1 to 3, the core 10 is retained on the body 3 by friction.

In the example illustrated, the core 10 is produced separately from the body 3 and is attached to the latter. The core 10 can be produced from the same thermoplastic material as the body 3 or alternatively from a different thermoplastic material. It is also possible to use a metal material to produce the core 10.

Axial ribs 38 are formed on the internal circumference of the housing 8, as can be seen in particular in figures 1 and 3, in order to center the core 10 in the housing 8. The centering reliefs 38 may be, as illustrated in figures 12A to 12C, parallel or oblique in the direction circumferential to the axis Z, or curved. Each relief 38 may have, when seen in a top view, a contour that is polygonal, in particular rectangular or trapezoidal, or that has a shape that is flared in the direction of the dispensing edge. Two centering reliefs 38 may define, between one another, a narrowing 39 in the vicinity of the dispensing orifice so as to accelerate the fluid via the Venturi effect. The number of centering reliefs 38 is preferably at least 10, better still 20, even better still 40. The space 22 formed between the core 10 and the body 3 may have the configuration illustrated schematically in figure 4A, and open onto the dispensing orifice 12 by way of an annular terminal portion 22c formed between two surfaces 3a and 10a which are in the form of cylinders of revolution about the axis Z.

The terminal wall 22c is attached to a proximal portion 22a by way of an inclined intermediate portion 22b formed between opposite surfaces 3b and 10b. The centering reliefs 38 extend in the proximal portion 22a. The latter is supplied with product via the distribution chamber 22d.

When the user actuates the dispensing head 1 , the product passes through the supply duct 7 into the space 22 between the core 10 and the body 3 and can be delivered in the form of a spray through the dispensing orifice 12.

In the example in figures 1 to 3, the spray is continued angularly around the dispensing axis on account of the absence of contact between the core 10 and the body 3 in the region of the dispensing orifice 12. Specifically, the bearing region or regions between the core 10 and the body 3 are for example located, as illustrated, set back from the dispensing orifice 12 by a distance (measured along the dispensing axis Z) of at least 0.5 mm.

The spray may be discontinuous angularly around the dispensing axis on account of the presence, in particular at the reliefs 38, of contact between the core 10 and the body 3 where the product emerges.

Preferably, the cross section of the supply duct 7 is greater than the section of the dispensing orifice 12 so as to allow the space located upstream of the dispensing orifice to be filled rapidly with the product, this being able to help to form a homogeneous spray right from the start of spraying.

The distribution chamber 22d formed upstream of the space 22a in which the centering reliefs 38 extend receives the product delivered through the supply duct 7.

The width ω of the distribution chamber 22d is greater than that / of the terminal portion 22c which opens onto the dispensing orifice 12. The distribution chamber 22d improves the distribution of the product before the latter reaches the narrowest portions of the passage through which the product is evacuated.

Figures 4B and 4C illustrate different other examples of possible configurations for the space 22 formed between the core 10 and the body 3 for the product to flow to the dispensing orifice. In the example in Figure 4B, the space 22 formed between the core and the body comprises a proximal portion 22a in which the centering reliefs 38 of the core 10 extend in relation to the body 3, extended by an intermediate portion 22b which forms an angle with the spraying direction Z, for example a re-entrant angle. This intermediate portion 22b can be attached to a terminal portion 22c, which opens onto the dispensing orifice 12, this terminal portion being defined for example, as illustrated, between two surfaces 3a and 10a, in the form of cylinders of revolution, parallel to the dispensing direction Z. The variant in figure 4B does not have a distribution chamber.

In the variant in figure 4C, the terminal portion 22c communicates directly with that portion 22a in which the centering reliefs 38 extend. The terminal portion 22c forms, for example, an angle with the dispensing direction Z. Thus, in axial half section, the axis Zi of the orifice 12 is for example convergent, as illustrated.

In the variant in figure 4D, the engaging part 10 is outside the body 3. The engaging part 10 is fixed to the body 3 so as to form with the latter the distribution chamber 22d, facing the supply duct 7. The portions 22a, 22b and 22c allow the product to be conveyed to the dispensing orifice 12.

The supply duct 7 opens for example into the distribution chamber 22d via a portion oriented parallel to the dispensing axis Z.

Centering reliefs 38 are produced for example on the body 3. The engaging part 10 can be produced, as illustrated, with an annular lip 39 which partially delimits the distribution chamber 22d and forms a narrowing 47 of the section between the chamber 22d and the portion 22a.

Figure 4E illustrates the possibility of having an angle which is divergent between the axis Z₂, in axial half section, of the orifice 12 and the dispensing axis.

In the variant in figure 4F, the possibility of having no angle between the dispensing axis and the axis Z of the engaging part 10 is illustrated. The supply duct 7 for example opens onto a distribution chamber 22d. The product is conveyed toward the dispensing orifice 12 via ducts 22 comprising reliefs 38. The reliefs 38 extend as far as the edge of the dispensing orifice 12 and define a plurality of orifices allowing the product to be delivered in the form of a plurality of jets. The invention is not limited to a dispensing head comprising only one dispensing orifice 12 produced in accordance with the invention.

By way of example, figure 5 illustrates a dispensing head 1 which comprises two dispensing orifices 12.

When there are a plurality of dispensing orifices, these may be distributed in multiple ways on the dispensing head. For example, the spraying axes are parallel, or form an angle, in that, for example, they intersect. Figures 7, 8A and 8B illustrate the possibility for the dispensing head to have a plurality of dispensing orifices 12 formed entirely in the core 10 in order to dispense the product in the form of a plurality of jets for example. The dispensing orifices 12 may have many shapes when observed along their transverse axis, especially being circular or triangular, as illustrated in figures 8A and 8B. The dispensing orifices 12 may be cut into the core 10, for example by laser cutting.

The core 10 may have a U-shaped axial half-section, as illustrated in figure 7. The body 3 may comprise two concentric mounting skirts 41 which define between them a space for mounting the core 10, and may comprise, at its center, a crown 43 serving to support the engaging part 10. The skirts 41 define, with the crown 43, two annular ducts 45 into which the arms of the U fit. The crown 43 may have, for each orifice 12, two ducts 22 for supplying liquid to this orifice 12.

During mounting, as illustrated in figures 14 and 17, the core 10 may bear against the pad 43, the end face 48 of the crown 43 making contact with the inner face 1 1 of the core 10. The arms of the U of the core 10 are fixed in the ducts 45, the inner face 46 of the mounting skirts 41 making contact with the face 13 of the core 10. The inner faces 14 of the arms of the U and the lateral surfaces 49 of the crown 43 may define, between one another, the ducts 22 for supplying liquid to the dispensing orifice 12. The crown 43 may have, especially in the form of impressions, on its outer face 48, supply ducts 23 allowing the liquid to pass from the supply ducts 22 to the dispensing orifice 12.

The supply ducts 22 open, upstream of the dispensing orifices 12, onto the supply ducts 23, which lead to the dispensing orifice 12. The supply ducts 23 generate, via their orientation relative to the dispensing orifice, a swirling flow at the outlet of the dispensing orifice 12. This configuration is more particularly useful in the case of a non-liquefied carrier gas.

In one variant, the supply ducts 22 may take the form of impressions on the lateral surface 49 of the body and/or on the inner faces 14 of the core 10. In another variant (not shown), the core 10 possesses, especially in the form of impressions on its inner face 1 1 , supply ducts 23, the end face 48 of the crown 43 possibly being smooth.

In a variant, the crown 43 is not circumferentially continuous and defines pads. The pads are placed upstream of the dispensing orifices 12 and may possess, upstream of the dispensing orifices 12, supply ducts 22 and 23 such as described above.

In the variant in figures 4F, 9 and 10, the dispensing orifices 12 are formed between the core 10 and the body 3, being for example distributed all around the spraying axis Z. The core 10 or the body 3 may have centering reliefs 38 that circumferentially bound the dispensing orifices 12. The centering reliefs 38 may, as illustrated in figures 12A to 12C, extend as far as the edge of the core 10 over its entire periphery and define, between one another, dispensing orifices 12. The number of dispensing orifices 12 is preferably at least 10, better still 20, even better still 40. The cross section of a dispensing orifice 12 is for example greater than 0.003 mm². The dispensing orifices 12 are preferably spaced apart by a space of at least 1 mm, which is the same as the pitch p between the centering reliefs. As illustrated in figures 10A and 10B, the dispensing orifices 12 can have a polygonal cross section, especially a triangular cross section.

The core 10 may, as illustrated in figure 13A, be set back relative to the body by an amount lying between 0 and 1 mm, better still between 0 and 0.5 mm. The body 3 protrudes into the dispensing orifice and may generate a convergent spray.

The core 10 may, as illustrated in figure 13B, lie flush with the body 3. The spray may then be straight.

The core 10 may extend, as illustrated in figure 13C, forward, relative to the body 3 by an amount lying between 0 and 1 mm, better still between 0 and 0.5 mm. The spray may then be divergent.

If an additional dispensing orifice is provided, for example by attaching inside the core 10 a second core 50 which defines with the first core 10 a second dispensing orifice 51 which is coaxial with the first dispensing orifice, as illustrated in figure 6, this does not depart from the scope of the present invention. A passage 90 continues to be formed through the dispensing head.

The dispensing orifice may be supplied with more than one product.

The dispensing head may be supplied with two products which are dispensed through separate dispensing orifices.

It is possible for the axis Z not to be perpendicular to the axis of the rod of the container on which the head is fitted, as illustrated in figure 1 1 . In this example, the axis Z is oriented upward when the container is vertical with the dispensing head at the top.

The supply duct 7 can be oriented substantially parallel to the dispensing axis Z, at least in the case of the portion which opens out facing the engaging part 10. The latter may be produced with an annular lip 39 which defines a narrowing of the section 47.

The configuration may be similar to that in figure 4D apart from the fact that the engaging part 10 is outside the body 3 in the example in figure 4D and inside it in the example in figure 1 1 .

The dispensing head may be arranged so as to allow a protective cap to be fitted and to comprise, if need be, an on/off system that makes it possible to prevent the actuation of the device when the dispensing head is in a certain position with respect to the container or when a locking element of the dispensing head is in a certain position in relation to the latter.

In variants which are not illustrated, the dispensing orifice is formed between a body and an engaging part, the body being radially on the inside with respect to the engaging part, the supply duct for the product passing through the body. All of the features described with reference to the figures can be found in variants in which the body is radially on the inside with respect to the engaging part. COMPOSITION

PULVERULENT BASE

The pulverulent base in accordance with the invention comprises at least:

1 ) perlite particles, and

2) particles of lamellar filler other than perlite,

3) and optionally particles of metal salt.

The pulverulent base according to the invention generally comprises less than 1 % by weight of water or solvent, or is free of water or solvent. In particular, the pulverulent base is anhydrous or solvent-free.

It is generally in the form of a loose powder. The pulverulent base may, at the end of the preparation process and before being brought into contact with any cosmetic solvent, be in the form of small clusters, the mean size of which is preferably less than 66.0 μιτι, and preferably ranges from 1 to 10 m in Di₀, and preferably from 15 to 25 μιτι in D₉₀.

The particle size is measured at 25°C by laser scattering with a Malvern Mastersizer instrument with the Dio by volume or the D₉₀ by volume.

Dio is the mean size by volume of 10% of the particles. D₉₀ is the mean size by volume of 90% of the particles. a) Perlite

The initial perlites which can be used according to the invention are generally aluminosilicates of volcanic origin and have the composition:

70.0-75.0% by weight of silica SiO₂

12.0-15.0% by weight of aluminum oxide AI2O3

3.0-5.0% of sodium oxide Na₂O

3.0-5.0% of potassium oxide K₂O

0.5-2% of iron oxide Fe2O3

0.2-0.7% of magnesium oxide MgO

0.5-1.5% of calcium oxide CaO

0.05-0.15% of titanium oxide TiO₂ The perlite is ground, dried and then sized in a first step. The product obtained, known as perlite ore, is gray-colored and has a size of the order of 100 μηη.

The perlite ore is subsequently expanded (1000°C/2 seconds) to give relatively white particles. When the temperature reaches 850-900°C, the water trapped in the structure of the material evaporates and brings about the expansion of the material, with respect to its original volume. The expanded perlite particles in accordance with the invention may be obtained via the expansion process described in patent US 5 002 698.

Preferably, the perlite particles used will be ground; in this case, they are known as Expanded Milled Perlite (EMP). They preferably have a particle size defined by a median diameter by volume D₅₀ ranging from 0.5 to 50 μιτι and preferably from 0.5 to 40 pm.

D₅₀ is the mean size by volume of 50% of the particles and is measured at 25°C by laser scattering with a Malvern Mastersizer instrument.

Preferably, the perlite particles used have a loose bulk density at 25°C ranging from 10 to 400 kg/m³ (standard DIN 53468) and preferably from 10 to 300 kg/m³.

Preferably, the expanded perlite particles according to the invention have a water absorption capacity, measured at the wet point, ranging from 200% to 1500% and preferably from 250% to 800%.

The wet point corresponds to the amount of water which has to be added to 1 g of particle in order to obtain a homogeneous paste. This method derives directly from the oil uptake method applied to solvents. The measurements are carried out in the same way via the wet point and the flow point, which have, respectively, the following definitions: wet point: mass expressed in grams per 100 g of product corresponding to the production of a homogeneous paste during the addition of a solvent to a powder; flow point: mass expressed in grams per 100 g of product above which the amount of solvent is greater than the capacity of the powder to retain it. This is reflected by the production of a more or less homogeneous mixture which flows over the glass plate. The wet point and the flow point are measured according to the following protocol:

Protocol for measuring the water absorption

1 ) Equipment used

Glass plate (25 x 25 mm)

Spatula (wooden shaft and metal part, 15 x 2.7 mm)

Silk-bristled brush

Balance 2) Procedure

The glass plate is placed on the balance and 1 g of perlite particles is weighed out. The beaker containing the solvent and the liquid sampling pipette is placed on the balance. The solvent is gradually added to the powder, the whole being regularly blended (every 3 to 4 drops) with the spatula.

The mass of solvent needed to obtain the wet point is noted. Further solvent is added and the mass which makes it possible to reach the flow point is noted. The average of three tests will be determined.

The expanded perlite particles sold under the trade names Optimat 1430 OR or Optimat 2550 by the company World Minerals will be used in particular.

The perlite particles are present, preferably, in the pulverulent base at concentrations ranging from 1 to 99% by weight, preferably from 20 to 80% by weight, more preferably from 30 to 60% by total weight of said pulverulent base. LAMELLAR FILLER(S)

The pulverulent base according to the invention comprises at least one lamellar filler that may be natural or synthetic. Said lamellar filler acts as a substrate with respect to the perlite.

Numerous materials exist naturally that have lamellar forms and that are of variable hardness. Mention may thus be made, for example, of phyllosilicates, in particular:

. talc, having a Mohs hardness of 1 ,

. smectite-type clays (montmorillonite, etc.) having a Mohs hardness of 1 to 2,

. micas (muscovite, biotite, phlogopite, etc.), having a Mohs hardness ranging from 2.5 to 3,

. serpentines (antigorite, etc.), having a Mohs hardness of from 2 to 5,

. sulfates, in particular barite (barium sulfate), having a Mohs hardness ranging from 3 to 3.5,

. neosilicates, such as disthene (or kyanite), having a Mohs hardness ranging from 5 to 7.

Some of these materials also exist as a synthetic version, such as the micas (fluorphlogopite).

As another synthetic lamellar filler, mention may be made of boron nitride, in particular in its hexagonal form. The lamellar filler used according to the invention will in particular have a Mohs hardness of greater than or equal to 2. ^* In one particular embodiment, the lamellar filler used according to the invention has a Mohs hardness of less than 5, in particular of less than or equal to 4.

The Mohs hardness is the hardness measured on the Mohs scale. This scale is based on ten readily available minerals; the hardness of a mineral compound is measured by carrying out a comparison (ability of one to scratch the other) with two other minerals, the hardnesses of which are already known.

Advantageously, the lamellar filler used according to the invention will in particular have a Mohs hardness of greater than or equal to 2 and an initial particle size ranging from 5 to 35 μιτι in D₅₀ and from 15 to 60 μιτι in D₉₀.

In the case of a mixture of lamellar fillers, the initial particle size of the mixture ranges from 5 to 35 μιτι in D₅₀ and from 15 to 60 μιτι in D₉₀.

D is the mean size by volume of the number of particles measured by laser scattering with a Malvern Mastersizer instrument.

D₅₀ is the mean size by volume of 50% of the particles; D₅₀ ranging from 5 to 35 μιτι means that 50% of the particles have a size by volume ranging from 5 to 35 μηη;

D₉₀ is the mean size by volume of 90% of the particles; D₉₀ ranging from 15 to 60 μιτι means that 90% of the particles have a size by volume ranging from 15 to 60 μιτι.

Thus, according to one particular embodiment, the lamellar filler or the mixture of lamellar fillers has an initial particle size of between 5 and 35 μιτι in D₅₀ and 15 and 60 μιτι in D₉₀.

The lamellar filler according to the invention could thus be selected in particular from clays, talcs, micas, synthetic micas, serpentines, sulfates, neosilicates, boron nitride and mixtures thereof. According to one particular embodiment, the lamellar filler used according to the invention is additionally characterized by a refractive index ranging from 1 .5 to 1 .75, preferably ranging from 1 .52 to 1 .64.

In particular, the lamellar filler according to the invention will be selected from talcs.

The talc in accordance with the invention may be selected more particularly from those sold under the names Rose Talc® and Talc SG-2000® sold by the company Nippon Talc, Luzenac Pharma M® sold by the company Luzenac, J- 68BC from US Corporation and Micro ACE-P-3® sold by the company Nippon Talc. The lamellar filler according to the invention is generally present in the pulverulent base of the invention in a content ranging from 1 to less than 50% by weight relative to the total weight, preferably from 5 to 45% by weight relative to the total weight of said pulverulent base.

According to one particularly preferred embodiment, the pulverulent base of the invention comprises at least one fatty acid salt.

FATTY ACID SALTS

The fatty acid salt or soap is obtained from a fatty acid and a base, the fatty acid comprising a linear or branched, saturated or unsaturated alkyl chain having from 12 to 22 carbon atoms and preferably 12 to 20 carbon atoms. The bases (also referred to as saponifying agents) completely or partially neutralize the fatty acids. The bases capable of being used to obtain the salts may for example be mineral bases such as alkali metal hydroxides (sodium and potassium hydroxide), alkaline-earth metal (magnesium or calcium) hydroxides or ammonium hydroxide, or else organic bases such as triethanolamine, N- methylglucannine, lysine and arginine. According to one particular embodiment of the invention, the base is magnesium hydroxide.

The fatty acid may be selected in particular from C10 to C24, and especially C12- C18, fatty acids, and in particular lauric acid, myristic acid, stearic acid, palmitic acid and mixtures thereof.

As soaps, mention may be made for example of the magnesium salts of C10-C24, especially C12-C20, more especially C12-C18, fatty acids. The soap may be more especially selected from the magnesium salts of C12-C18 fatty acids, more especially the magnesium salt of stearic acid (INCI name: magnesium stearate).

The amount of fatty acid salt in the pulverulent base of the invention preferably ranges from 0.5 to 5% by weight, preferably from 2 to 4% by weight relative to the total weight of the pulverulent base.

According to one particular embodiment of the invention, the pulverulent base comprises:

a) from 1 % to 99% by weight, preferably 20% to 80% by weight, and more preferentially from 30% to 60% of perlite,

b) from 1 % to 50% by weight, preferably 5% to 45% by weight of talc,

c) from 0.5% to 5% by weight, preferably from 2% to 4% by weight of magnesium stearate.

PROCESS FOR PREPARING THE PULVERULENT BASE

The perlite particles, the lamellar fillers and the metal soap described above are dry mixed, in proportions in accordance with the invention, then subjected to a dry grinding step. Among the various dry grinding processes, use may be made of powder grinder- micronizers operating by friction or collision or a combination thereof, which make it possible to obtain very fine grinding grades (D₅₀ < 10 μιτι), such as an air (or inert gas) jet grinder or a pin mill, in particular an air jet grinder.

In particular, use may be made of air jet grinders or pin mills, more preferably an air jet grinder. The principle of air jet powder grinders is the following: the material(s) to be ground is (are) conveyed into a grinding chamber by the compressed feed air. Flows of compressed air or of another inert gas entering countercurrently into the grinding chamber through nozzles (micronizing compressed air) accelerate the particles which collide with one another in a maximum turbulence zone. The powders obtained, which may reach a micron size (of the order of several microns, or even of the order of one micron, or even less for pigments), are then recovered via cyclone systems.

A "grinder-micronizer" according to the invention is understood to mean a grinder that enables particles to be refined to sizes of the order of several microns, or even of the order of one micron, or even less for the perlite particles.

As trade names of grinders for dry grinding, mention may especially be made of the CHRISPRO Jet Mill air jet grinder, manufactured by MICRO-MACINAZIONE S.A. (Italy) and the HOSOKAWA pin mill, supplied by ALPINE A.G. (Germany).

Preferably, use will be made of an air jet grinder.

The process for preparing the pulverulent base according to the invention especially comprises the steps consisting in:

a) introducing the perlite particles, and the lamellar fillers in the amounts prescribed according to the invention, into a powder mixer (for example of Novamix Baker type);

b) mixing until a macroscopically homogeneous product is obtained;

c) passing the mixture thus obtained through a powder grinder-micronizer, in particular through an air jet grinder; and

d) optionally storing the pulverulent base thus obtained in a storage package.

According to one preferred embodiment, all the steps of the process are carried out exclusively in a dry medium (without the addition of solvent).

The pulverulent base will generally be in the form of a loose powder.

A person skilled in the art will use the powder grinders according to the recommendations of the supplier.

Thus, for the air jet grinder: - the feed pressure will be adapted in order to ensure a supply of powder at a regular flow rate;

- the value of the micronizing pressure, which allows air (or inert gas) to be fed at very high speed through the peripheral nozzles, will be adjusted depending on the target particle size; and

- the flow rate will depend on the type of mixture and on the capacity of the grinder.

For example, for the Jet Mill air jet grinder use will generally be made of a feed pressure of from 4 to 8 bar, in particular of from 5 to 7 bar, a micronizing pressure of from 3 to 6 bar, in particular of from 3.5 to 5.5 bar, and a flow rate which will depend on the type of mixture and on the capacity of the grinder.

According to one particular embodiment of the invention, the pulverulent base capable of being obtained according to this process has a particle size profile with a Dio ranging from 1 to 15 μιτι, and preferably from 1 to 10 μιτι, and a D₉₀ ranging from 15 to 55 μιτι, and preferably from 15 to 25 μιτι.

The particle size analysis of the particles (perlite, fillers, pulverulent base) is generally carried out by simple dispersion of said particles in a liquid dispersant and is measured at 25°C for example using a laser particle sizer, according to the recommendations of the supplier.

DEODORANT ACTIVE AGENTS

Among the deodorant active agents, mention may in particular be made of antiperspirant active agents.

The expression "antiperspirant active agent" is understood to mean any aluminum salt or complex which, by itself alone, has the effect of reducing the flow of sweat, of reducing the sensation on the skin of moisture associated with human sweat and of masking human sweat.

According to one particular embodiment of the invention, the deodorant active agent present in the composition is an antiperspirant active agent.

Among the deodorant active agents that can be used according to the invention, mention may be made of antiperspirant or astringent active agents. They are preferably chosen from aluminum and/or zirconium salts; complexes of zirconium hydroxychloride and of aluminum hydroxychloride with an amino acid, such as those described in patent US-3 792 068, commonly known as "ZAG complexes". Such complexes are generally known under the name ZAG (when the amino acid is glycine). ZAG complexes ordinarily have an Al/Zr quotient ranging from about 1 .67 to 12.5 and a metal/CI quotient ranging from about 0.73 to 1 .93. Among these products, mention may be made of aluminum zirconium octachlorohydrex GLY, aluminum zirconium pentachlorohydrex GLY, aluminum zirconium tetrachlorohydrate GLY and aluminum zirconium trichlorohydrate GLY. Among the aluminum salts, mention may be made of aluminum chlorohydrate, aluminum chlorohydrex, aluminum chlorohydrex PEG, aluminum chlorohydrex PG, aluminum dichlorohydrate, aluminum dichlorohydrex PEG, aluminum dichlorohydrex PG, aluminum sesquichlorohydrate, aluminum sesquichlorohydrex PEG, aluminum sesquichlorohydrex PG, alum salts, aluminum sulfate, aluminum zirconium octachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate and more particularly the aluminum chlorohydrate sold by the company Reheis under the name Microdry Aluminum Chlorohydrate® or by the company Guilini Chemie under the name Aloxicoll PF 40. Aluminum and zirconium salts are, for example, the product sold by the company Reheis under the name Reach AZP-908-SUF®, "activated" aluminum salts, for example the product sold by the company Reheis under the name Reach 103 or by the company Westwood under the name Westchlor 200.

Among the antiperspirant active agents, use will more particularly be made of aluminum chlorohydrate, aluminum sesquichlorohydrate and mixtures thereof.

The deodorant active agents may also be bacteriostatic agents or bactericides that act on underarm odor microorganisms, such as 2,4,4'-trichloro-2'- hydroxydiphenyl ether (©Triclosan), 2,4-dichloro-2'-hydroxydiphenyl ether, 3',4',5'- trichlorosalicylanilide, 1 -(3',4'-dichlorophenyl)-3-(4'-chlorophenyl)urea (©Triclocarban) or 3,7,1 1 -trimethyldodeca-2, 5,10-trienol (©Farnesol); quaternary ammonium salts such as cetyltrimethylammonium salts, cetylpyridinium salts, DPTA (1 ,3-diaminopropanetetraacetic acid), 1 ,2-decanediol (Symclariol from the company Symrise); glycerol derivatives, for instance caprylic/capric glycerides (Capmul MCM® from Abitec), glyceryl caprylate or caprate (Dermosoft GMCY® and Dermosoft GMC®, respectively from Straetmans), polyglyceryl-2 caprate (Dermosoft DGMC® from Straetmans), and biguanide derivatives, for instance polyhexamethylene biguanide salts; chlorhexidine and salts thereof; 4-phenyl-4,4- dimethyl-2-butanol (Symdeo MPP® from Symrise); zinc salts such as zinc salicylate, zinc gluconate, zinc pidolate, zinc sulfate, zinc chloride, zinc lactate or zinc phenolsulfonate; salicylic acid and derivatives thereof such as 5-n- octanoylsalicylic acid.

The deodorant active agents may be odor absorbers such as zinc ricinoleates, sodium bicarbonate; metallic or silver or silver-free zeolites, or cyclodextrins and derivatives thereof. They may also be chelating agents such as Dissolvine GL-47- S® from Akzo Nobel, EDTA and DPTA. They may also be a polyol such as glycerol or 1 ,3-propanediol (Zemea Propanediol sold by Dupont Tate and Lyle Bioproducts).

The deodorant active agents may also be enzyme inhibitors such as triethyl citrate or alum.

In the event of incompatibility and/or to stabilize them, for example, some of the active agents mentioned above may be incorporated into spherules, especially ionic or nonionic vesicles and/or nanoparticles (nanocapsules and/or nanospheres).

The deodorant active agents may be present in the cosmetic composition according to the invention in a concentration of from 0.01 to 15% by weight relative to the total weight of the composition.

OILY PHASE The compositions according to the invention may contain at least one water- immiscible organic liquid phase, known as a fatty phase. This phase generally comprises one or more hydrophobic compounds that make said phase water- immiscible. Said phase is liquid at ambient temperature (20-25°C). Preferentially, the water-immiscible organic liquid phase in accordance with the invention generally comprises at least one volatile oil and/or one non-volatile oil and optionally at least one structuring agent.

Preferentially, the oily phase is present in concentrations ranging from 1 to 60% by weight and more preferentially from 10 to 45% by weight relative to the total weight of the composition.

The term "oil" means a fatty substance which is liquid at ambient temperature (25°C) and atmospheric pressure (760 mmHg, i.e. 10⁵ Pa). The oil may be volatile or non-volatile.

For the purposes of the invention, the term "volatile oil" is intended to mean an oil that is capable of evaporating on contact with the skin or the keratin fiber in less than one hour, at ambient temperature and atmospheric pressure. The volatile oils of the invention are volatile cosmetic oils that are liquid at ambient temperature, with a non-zero vapor pressure, at ambient temperature and atmospheric pressure, ranging in particular from 0.13 Pa to 40 000 Pa (10^"3 to 300 mmHg), in particular ranging from 1 .3 Pa to 13 000 Pa (0.01 to 100 mmHg) and more particularly ranging from 1 .3 Pa to 1300 Pa (0.01 to 10 mmHg). The term "non-volatile oil" is intended to mean an oil that remains on the skin or the keratin fiber at ambient temperature and atmospheric pressure for at least several hours, and that especially has a vapor pressure of less than 10^"3 mmHg (0.13 Pa). The oil may be chosen from any oil, preferably physiologically acceptable oils and in particular cosmetically acceptable oils, especially mineral, animal, plant or synthetic oils; in particular volatile or non-volatile hydrocarbon-based oils and/or silicone oils and/or fluoro oils, and mixtures thereof. More precisely, the term "hydrocarbon-based oil" means an oil mainly comprising carbon and hydrogen atoms and optionally one or more functions chosen from hydroxyl, ester, ether and carboxylic functions. Generally, the oil has a viscosity of from 0.5 to 100 000 mPa.s, preferably from 50 to 50 000 mPa.s and more preferably from 100 to 300 000 mPa.s.

As examples of volatile oils that may be used in the invention, mention may be made of:

volatile hydrocarbon-based oils chosen from hydrocarbon-based oils containing from 8 to 16 carbon atoms, and especially C8-C16 isoalkanes of petroleum origin (also known as isoparaffins), for instance isododecane (also known as 2,2,4,4,6-pentamethylheptane), isodecane and isohexadecane, for example the oils sold under the trade names Isopar or Permethyl, branched C8- C16 esters and isohexyl neopentanoate, and mixtures thereof. Use may also be made of other volatile hydrocarbon-based oils, such as petroleum distillates, in particular those sold under the name Shell Solt by the company Shell; and volatile linear alkanes, such as those described in Patent Application DE10 2008 012 457 by the company Cognis.

volatile silicones, for instance linear or cyclic volatile silicone oils, in particular those with a viscosity of≤ 8 centistokes (8 10^"6 m²/s), and containing in particular from 2 to 7 silicon atoms, these silicones optionally comprising alkyl or alkoxy groups containing from 1 to 10 carbon atoms. As volatile silicone oils that may be used in the invention, mention may be made especially of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane and dodecamethylpentasiloxane;

- and mixtures thereof.

As examples of non-volatile oils that may be used in the invention, mention may be made of:

- hydrocarbon-based oils of animal origin, such as perhydrosqualene;

- hydrocarbon-based oils of plant origin, such as liquid triglycerides of fatty acids containing from 4 to 24 carbon atoms, for instance caprylic/capric acid triglycerides such as those sold by the company Stearineries Dubois or those sold under the names Miglyol 810, 812 and 818 by the company Dynamit Nobel;

- linear or branched hydrocarbons of mineral or synthetic origin, such as liquid paraffins and derivatives thereof, petroleum jelly, polydecenes, polybutenes, hydrogenated polyisobutene, such as Parleam, or squalane;

synthetic ethers containing from 10 to 40 carbon atoms;

synthetic esters, especially of fatty acids, such as isononyl isononanoate, isopropyl myristate, isopropyl palmitate, C12-C15 alcohol benzoate, hexyl laurate, diisopropyl adipate, 2-ethylhexyl palmitate, 2-octyldodecyl stearate, 2-octyldodecyl erucate, isostearyl isostearate;

- fatty alcohols that are liquid at ambient temperature, containing a branched and/or unsaturated carbon-based chain containing from 12 to 26 carbon atoms, for instance octyldodecanol, isostearyl alcohol, 2-butyloctanol, 2-hexyldecanol, 2- undecylpentadecanol or oleyl alcohol;

- higher fatty acids, such as oleic acid, linoleic acid or linolenic acid;

- carbonates;

- acetates; - citrates;

- fluoro oils that are optionally partially hydrocarbon-based and/or silicone-based, for instance fluorosilicone oils, fluoropolyethers and fluorosilicones as described in the document EP-A-847 752;

- silicone oils, for instance non-volatile polydimethylsiloxanes (PDMSs); phenyl silicones, for instance phenyl trimethicones, phenyl dimethicones, phenyl- trimethylsiloxydiphenylsiloxanes, diphenyl dimethicones, diphenylmethyl- diphenyltrisiloxanes, 2-phenylethyl trimethylsiloxysilicates, and

mixtures thereof.

When the composition is in the form of a water-in-oil emulsion, the oily phase preferably comprises at least one non-volatile silicone oil and more preferably a non-volatile polydimethylsiloxane (PDMS) (INCI name: Dimethicone). In this case, the non-volatile silicone oil or oils are preferably present in amounts ranging from 5 to 30% by total weight, and more preferentially from 10 to 25% by weight relative to the total weight of the oily phase.

According to a particular embodiment of the invention, the composition is in anhydrous form.

PROPELLANT

The propellants are advantageously selected from dimethyl ether (DME), volatile hydrocarbons such as n-butane, propane, isobutane, and mixtures thereof, optionally with at least one chlorinated and/or fluorinated hydrocarbon. Among the latter, mention may be made of the compounds sold by the company DuPont de Nemours under the names Freon® and Dymel®, and in particular monofluorotrichloromethane, difluorodichloromethane, tetrafluorodichloroethane and 1 ,1 -difluoroethane, sold especially under the trade name Dymel 152 A by the company DuPont. Carbon dioxide, nitrous oxide, nitrogen or compressed air may also be used as propellant.

The composition containing the deodorant active agent(s) and the propellant(s) may be in the same compartment or in different compartments in the container.

According to the invention, the concentration of propellant preferably ranges between 55% and 95% by weight relative to the total weight of the pressurized composition. More preferably, the concentration of propellant ranges from 70% to 85% by weight relative to the total weight of the pressurized composition.

The expression "pressurized composition" is understood to mean the total fluid+gas composition contained in the container. WATER-IN-OIL EMULSIONS

According to one particular embodiment of the invention, the composition is in the form of a water-in-oil emulsion, that is to say in which the aqueous phase is dispersed in the oily phase and forms a composition that is macroscopically homogeneous to the naked eye.

According to one particularly preferred embodiment of the invention, the composition is in the form of a water-in-oil emulsion, that is to say that the oily phase comprises at least one volatile silicone oil.

According to a particular embodiment of the invention, the composition is in the form of a water-in-oil emulsion and more particularly a water-in-silicone emulsion

The aqueous phase of said compositions contains water and generally other water-soluble or water-miscible solvents. The water-soluble or water-miscible solvents comprise short-chain, for example C1 -C4, monoalcohols, such as ethanol or isopropanol; diols or polyols, such as ethylene glycol, 1 ,2-propylene glycol, 1 ,3-butylene glycol, hexylene glycol, diethylene glycol, dipropylene glycol, 2-ethoxyethanol, diethylene glycol monomethyl ether, triethylene glycol monomethyl ether and sorbitol. Use will more particularly be made of propylene glycol and glycerol, and propane-1 ,3-diol. The composition according to the invention preferably has a pH ranging from 3 to 9, depending on the support chosen.

The water-in-oil emulsions generally contain one or more water-in-oil emulsifiers. Among the emulsifers which can be used in the water-in-oil emulsions, mention may be made, by way of example, of alkyl dimethicone copolyols, for instance Cetyl PEG/PPG-10/1 Dimethicone and more particularly the mixture Cetyl PEG/PPG-10/1 Dimethicone and Dimethicone (INCI name), such as the product sold under the trade name Abil EM90 by the company Goldschmidt, or alternatively the mixture (Polyglyceryl-4 stearate and Cetyl PEG/PPG-10 (and) Dimethicone (and) Hexyl Laurate), such as the product sold under the trade name Abil WE09 by the company Goldschmidt. Mention may also be made of Lauryl PEG-9 polydimethylsiloxyethyl dimethicone, such as the commercial product KF- 6038 from Shin Etsu.

Among the water-in-oil emulsifiers, mention may also be made of dimethicone copolyols, for instance PEG-18/PPG-18 Dimethicone and more particularly the mixture Cyclopentasiloxane (and) PEG-18/PPG-18 Dimethicone (INCI name), such as the product sold by the company Dow Corning under the trade name Silicone DC 5225 C or KF-6040 from Shin-Etsu.

Among the water-in-oil emulsifiers, mention may also be made of nonionic emulsifiers derived from fatty acids and polyols, alkyl polyglycosides (APGs), sugar esters and mixtures thereof. As nonionic emulsifiers derived from fatty acids and polyols, use may be made especially of fatty acid esters of polyols, the fatty acid especially containing a C8- C24 alkyl chain, and the polyols being, for example, glycerol and sorbitan. Fatty acid esters of polyols that may especially be mentioned include isostearic acid esters of polyols, stearic acid esters of polyols, and mixtures thereof, in particular isostearic acid esters of glycerol and/or sorbitan.

Stearic acid esters of polyols that may especially be mentioned include the polyethylene glycol esters, for instance PEG-30 Dipolyhydroxystearate, such as the product sold under the name Arlacel P135 by the company ICI.

Examples of glycerol and/or sorbitan esters that may be mentioned include polyglyceryl isostearate, such as the product sold under the name Isolan Gl 34 by the company Goldschmidt; sorbitan isostearate, such as the product sold under the name Arlacel 987 by the company ICI; sorbitan glyceryl isostearate, such as the product sold under the name Arlacel 986 by the company ICI, the mixture of sorbitan isostearate and polyglyceryl isostearate (3 mol) sold under the name Arlacel 1690 by the company Uniqema, and mixtures thereof.

The emulsifier can also be chosen from alkyl polyglycosides having an HLB of less than 7, for example those represented by the following general formula (1 ):

R-0-(G)x (1 ) in which R represents a branched and/or unsaturated alkyl radical comprising from 14 to 24 carbon atoms, G represents a reduced sugar comprising 5 or 6 carbon atoms, and x is a value ranging from 1 to 10 and preferably from 1 to 4, and G especially denotes glucose, fructose or galactose.

The unsaturated alkyl radical may comprise one or more ethylenically unsaturated groups, and in particular one or two ethylenically unsaturated groups.

As alkyl polyglycosides of this type, mention may be made of the alkyl polyglucosides (G = glucose in formula (I)), and in particular the compounds of formula (I) in which R more particularly represents an oleyl radical (unsaturated C18 radical) or isostearyl radical (saturated C18 radical), G denotes glucose, x is a value ranging from 1 to 2, in particular isostearyl glucoside or oleyl glucoside, and mixtures thereof. This alkyl polyglucoside may be used as a mixture with a coemulsifier, more especially with a fatty alcohol and especially a fatty alcohol containing the same fatty chain as that of the alkyl polyglucoside, i.e. comprising from 14 to 24 carbon atoms and containing a branched and/or unsaturated chain, for example isostearyl alcohol when the alkyl polyglucoside is isostearyl glucoside, and oleyl alcohol when the alkyl polyglucoside is oleyl glucoside, optionally in the form of a self-emulsifying composition, as described, for example, in document WO-A-92/06778. Use may be made, for example, of the mixture of isostearyl glucoside and isostearyl alcohol, sold under the name Montanov WO 18 by the company SEPPIC. Use will more particularly be made of alkyl dimethicone copolyols such as Cetyl PEG/PPG-10/1 Dimethicone and more particularly the mixture Cetyl PEG/PPG- 10/1 Dimethicone and Dimethicone (INCI name), for instance the product sold under the trade name Abil EM90 by the company Goldschmidt, or alternatively the mixture (Polyglyceryl-4 Stearate and Cetyl PEG/PPG-10 (and) Dimethicone (and) Hexyl Laurate), for instance the product sold under the trade name Abil WE09 by the company Goldschmidt, and even more particularly Lauryl PEG-9 polydimethylsiloxyethyl dimethicone, such as the commercial product KF-6038® from Shin Etsu.

The total amount of emulsifiers in the composition will preferably be, in the composition according to the invention, at active material contents ranging from 1 % to 8% by weight and more particularly from 2% to 6% by weight, relative to the total weight of the composition.

ADDITIVES

The cosmetic compositions according to the invention may also comprise cosmetic adjuvants chosen from lipophilic suspension agents or gelling agents, softeners, antioxidants, opacifiers, stabilizers, moisturizers, vitamins, bactericides, preserving agents, polymers, fragrances, thickeners or suspending agents or any other ingredient usually used in cosmetics for this type of application.

Needless to say, a person skilled in the art will take care to select this or these optional additional compounds such that the advantageous properties intrinsically associated with the cosmetic composition in accordance with the invention are not, or are not substantially, adversely affected by the envisaged addition(s).

Suspension agents/gelling agents

The antiperspirant composition according to the invention may also contain one or more suspension agents and/or one or more gelling agents. Some of them may perform both functions simultaneously. Among the agents that may be used as lipophilic suspension agents and/or gelling agents, mention may be made of clays, in powder form or in oily gel form, it being possible for said clays optionally to be modified, especially modified montmorillonite clays such as hydrophobic-modified bentonites or hectorites, for instance hectorites modified with a C10 to C22 ammonium chloride, for instance hectorite modified with distearyldimethylammonium chloride, such as for example the product disteardimonium hectorite (CTFA name) (product of reaction of hectorite and of distearyldimonium chloride) sold under the name Bentone 38 or Bentone Gel by the company Elementis Specialities. Mention may be made, for example, of the product Stearalkonium Bentonite (CTFA name) (product of reaction of bentonite and of quaternary stearalkonium ammonium chloride) such as the commercial product sold under the name Tixogel MP 250® by the company Sud Chemie Rheologicals, United Catalysts Inc.

Use may also be made of hydrotalcites, in particular hydrophobic-modified hydrotalcites, for instance the products sold under the name Gilugel by the company BK Giulini.

Mention may also be made of fumed silica optionally subjected to a hydrophobic surface treatment, the particle size of which is less than 1 μιτι. It is in fact possible to chemically modify the surface of the silica, by chemical reaction generating a reduced number of silanol groups present at the surface of the silica. It is possible in particular to replace silanol groups with hydrophobic groups: a hydrophobic silica is then obtained. The hydrophobic groups may be trimethylsiloxyl groups, which are obtained in particular by treatment of fumed silica in the presence of hexamethyldisilazane. Silicas thus treated are named "silica silylate" according to the CTFA (8th edition, 2000). They are sold, for example, under the references Aerosil R812® by the company Degussa, Cab-O-Sil TS-530® by the company Cabot. The hydrophobic groups may also be dimethylsilyloxyl or polydimethylsiloxane groups, which are obtained especially by treating fumed silica in the presence of polydimethylsiloxane or dimethyldichlorosilane. Silicas thus treated are known as "silica dimethyl silylate" according to the CTFA (8th Edition, 2000). They are sold, for example, under the references Aerosil R972® and Aerosil R974® by the company Degussa, and Cab-O-Sil TS-610® and Cab- O-Sil TS-720® by the company Cabot.

The hydrophobic fumed silica in particular has a particle size that may be nanometric to micrometric, for example ranging from approximately 5 to 200 nm.

According to a particular embodiment of the invention, the suspension agents or gelling agents may be activated with oils such as propylene carbonate or triethyl citrate.

The amounts of these various constituents that may be present in the composition according to the invention are those conventionally used in compositions for treating perspiration.

The invention also relates to a method for the cosmetic treatment of human perspiration, and optionally of the body odors associated with human perspiration, which consists in applying to the surface of the skin an effective amount of the cosmetic composition as described previously.

The application time of the cosmetic composition on the surface of the skin may range from 0.5 to 10 seconds and preferably from 1 to 5 seconds. The cosmetic composition in accordance with the invention may be applied several times to the surface of the skin. In particular, the cosmetic treatment method according to the invention consists in applying to the surface of the armpits an effective amount of the cosmetic composition as described above. The invention also relates to the use of said composition for the cosmetic treatment of human perspiration.

Another subject of the present invention is an aerosol device consisting of a container comprising an aerosol composition as defined previously and of a means for dispensing said composition.

The dispensing means, which forms a part of the aerosol device, generally consists of a dispensing valve controlled by a dispensing head, which itself comprises a nozzle via which the aerosol composition is vaporized. The container containing the pressurized composition may be opaque or transparent. It may be made of glass, polymer or metal, optionally coated with a protective varnish coat.

The examples which follow illustrate the present invention without limiting the scope thereof.

Method for measuring the transfer

The measurement of the transfer onto clothing was performed according to the protocol described below:

Each of the compositions to be studied was deposited on an imitation leather article sold under the name Supplale® by the company Idemitsu Technofine, which is bonded onto a rigid support. This deposition is performed by spraying the aerosol for 2 seconds at a distance of 15 cm from the support.

After drying for 24 h, a black cotton fabric, which is dry or has been sprayed with artificial^* sweat, is deposited on the imitation leather article. A pressure of 1 newton is applied with a rotational motion over 1 rotation at a speed of 3.14 cm/sec.

The fabric is scanned with a scanner sold under the name Epson V500 Scanner (settings:16-bit grayscale, resolution of 300 dpi).

The gray level of the scans is then analyzed using ImageJ software which has a gray level ranging from 0 to 255. The higher the gray level value, the stronger the marks. It is thus sought to obtain the lowest possible gray level values.

The transfer evaluation is also performed by observation of the residual deposit on the synthetic leather plate:

The persistence is considered as being very good when the deposit is unchanged after the fabric has been passed over. It is considered as being good when the deposit is visible after the fabric has been passed over

It is considered as being poor when the deposit is no longer (or only slightly) visible after the fabric has been passed over.

Composition of the artificial sweat:

Example 1 of pulverulent base preparation

A pulverulent base of the following composition was prepared according to the following protocol.

Procedure

The perlite, the talc and the magnesium stearate were introduced into a Novamix® BAKER powder mixer and ground with a Chrispro Jet Mill® air jet grinder manufactured by MICRO-MACINAZIONE S.A. (Italy) at a feed pressure of 6 bar, a micronizing pressure ranging from 3 to 6 bar. A pulverulent base was obtained having a particle size with a Dio by volume of 2.831 μιτι and a D₉₀ by volume of 20.64 μιτι.

Examples 2 and 3: Aerosol water-in-oil emulsions

At ambient temperature (25°C), the Dimethicone (and) Dimethiconol, Phenoxyethanol, Tetrasodium Glutamate Diacetate, Dimethicone were introduced into the manufacturing tank, under turbomixer stirring. When the mixture was homogeneous, the aqueous phase (water + aluminum chlorohydrate) was introduced under turbomixer stirring and at ambient temperature (25°C), the stirring being continued for 10 minutes. The pulverulent base according to the invention was introduced under stirring, and homogenized for 5 minutes.

Two devices 2 and 3 were prepared for dispensing each of the compositions 2 and 3, comprising:

i) a dispensing head (1 ) intended to be fitted on a container that contains each composition, comprising:

- a body (3) that is open at its two opposite axial ends,

- an engaging part (10) that is open at its two opposite axial ends, defining 20 holes of triangular cross section, the sum of the cross sections being 0.242 mm² and the individual section being 0.0121 mm². The quality of the spray at time t = 0 was observed during the spraying by the amount of fluid discharged.

Evaluation of the quality of the spray Device number Blockage at t = 0

Device 2 No blockage

(invention)

Device 3 99% blockage

(outside the

invention)

The device 2 with the fornnula according to the invention comprising the pulverulent base based on perlite, talc and magnesium stearate produced a three- fold benefit: care, efficacy and ease-of-use: does not sting, does not give a cold effect, gives a veil of softness to the skin, a soft and satiny film, while having a perception of efficacy. After application, a very good persistence on the leather support imitating the skin, and a low gray level were observed. Whereas the device 3 with the formula containing perlite alone, due to blocking, did not make it possible to measure the effects of the product after application.

Claims

1. A device for dispensing a composition, comprising:

1) a dispensing head (1 ) intended to be fitted on a container that contains said composition, comprising:

- a body (3) that is open at its two opposite axial ends,

a) a continuous oily phase, and

b) at least one deodorant active agent, and

c) at least one pulverulent base comprising at least:

1 ) perlite particles, and

2) particles of lamellar filler other than perlite, and

3) optionally at least one fatty acid salt, and

d) at least one propellant. 2. The device as claimed in claim 1 , the dispensing orifice (12) being annular and having preferably, in the circumferential direction, a constant width (/).

3. The device as claimed in either one of the preceding claims, the dispensing orifice(s) (12) having axial symmetry, preferably rotational symmetry.

4. The device as claimed in any one of the preceding claims, the dispensing orifice (12) having a triangular cross section.

5. The device as claimed in claim 1 , the engaging part (10) at least partially defining a plurality of dispensing orifices (12), the sum of the cross sections of the dispensing orifices being between 0.05 mm² and 0.5 mm².

6. The device as claimed in claim 4, the number of dispensing orifices (12) being greater than or equal to 5, preferably greater than or equal to 10.

7. The device as claimed in any one of the preceding claims, the cross section of the dispensing orifices being between 0.03 mm² and 0.4 mm², preferably between 0.05 mm² and 0.5 mm², and preferably between 0.05 mm² and 0.4 mm².

8. The device as claimed in any one of claims 1 to 7, where the deodorant active agent is selected from antiperspirant active agents, in particular the salts or complexes of aluminum and/or of zirconium, and more particularly still selected from aluminum chlorohydrate, aluminum sesquichlorohydrate and mixtures thereof.

9. The device as claimed in any one of claims 1 to 8, where the lamellar filler is selected from clays, talcs, micas, synthetic micas, serpentines, sulfates, neosilicates, boron nitride and mixtures thereof, and more particularly talcs.

10. The device as claimed in any one of claims 1 to 9, where the lamellar filler is characterized by a refractive index ranging from 1 .5 to 1 .75, preferably ranging from 1 .52 to 1 .64.

11. The device as claimed in any one of claims 1 to 10, where the pulverulent base comprises at least one fatty acid salt, preferably selected from the magnesium salts of C10-C24, in particular C12-C20, more especially C12-C18 fatty acids, and more particularly magnesium stearate.

12. The device as claimed in any one of claims 1 to 1 1 , where the pulverulent base comprises:

b) from 1 % to 50% by weight, preferably 5% to 45% by weight of talc,

13. The device as claimed in any one of claims 1 to 12, where the composition is in anhydrous form.

14. The device as claimed in any one of claims 1 to 12, where the composition is in the form of a water-in-oil emulsion and more particularly a water-in-silicone emulsion.

15. The device as claimed in claim 14, where the composition comprises one or more water-in-oil emulsifiers, more particularly selected from alkyl dimethicone copolyols, and more particularly still is LAURYL PEG-9 POLYDIMETHYLSILOXYETHYL DIMETHICONE.

16. The device as claimed in any one of claims 1 to 15, where the pulverulent base has a particle size profile with a Di₀ by volume ranging from 1 to 15, and preferably from 1 to 10 μιτι, and a D₉₀ by volume ranging from 15 to 55 μιτι, and preferably from 15 to 25 μιτι.

17. A method for the cosmetic treatment of body odor and optionally of human perspiration, which consists in applying to the surface of a keratin material a composition dispensed by means of the dispensing device as claimed in any one of claims 1 to 16.