Aerosol device for hair shaping and/or hairstyle hold

Abstract

The invention relates to an aerosol device comprising: a container containing a cosmetic composition which comprises at least one fixing polymer, and a dispensing head (3) comprising a body (5) and an end part (7) comprising at least two outlet orifices (12) configured to allow spraying of the composition about a longitudinal axis (Y) of the end part (7) in at least two different directions, the dispensing head (3) comprising at least first (15) and second (16) chambers, through which the composition stream successively passes before it exits via the outlet orifices (12).

Claims

1. An aerosol device comprising: a container comprising a cosmetic composition comprising a fixing polymer; and a dispensing head comprising: a body; and a diffuser comprising: outlet orifices configured to spray the cosmetic composition in different directions with respect to a longitudinal axis of the diffuser; first and second concentric chambers through which the composition successively passes before it exits the dispensing head via the outlet orifices; a separation skirt that separates the first and second concentric chambers, the separation skirt having at least two apertures configured to allow the cosmetic composition to pass through the separation skirt; and at least one aperture disposed between the first and second concentric chambers being angularly offset relative to at least one of the outlet orifices.

2. The aerosol device of claim 1, wherein the fixing polymer is chosen from anionic fixing polymers, amphoteric fixing polymers, nonionic fixing polymers, or any combination thereof.

3. The aerosol device of claim 1, wherein the fixing polymer is chosen from anionic fixing polymers, nonionic fixing polymers, or any combination thereof.

4. The aerosol device of claim 1, wherein the fixing polymer comprises anionic fixing polymers chosen from: copolymers of acrylic and methacrylic acid or salts thereof; crotonic acid copolymers; polyacrylamides bearing carboxylate groups; homopolymers or copolymers bearing sulfonic groups; anionic polyurethanes; anionic-grafted silicone polymers; or any combination thereof.

5. The aerosol device of claim 1, wherein the fixing polymer comprises anionic fixing polymers chosen from: polyalkyloxazolines; vinyl acetate homopolymers; vinyl acetate copolymers; homopolymers and copolymers of esters; copolymers of acrylonitrile and a nonionic monomer; styrene homopolymers; styrene copolymers; polyamides; vinyllactam homopolymers; vinyllactam copolymers; polyvinyl alcohols, or any combination thereof.

6. The aerosol device of claim 1, wherein relative to the total weight of the cosmetic composition, the fixing polymers are present in an amount ranging from 0.1% to 20% by weight.

7. The aerosol device of claim 1, wherein the cosmetic composition comprises a water-insoluble powder.

8. The aerosol device of claim 7, wherein the water-insoluble powder comprises a mineral powder chosen from metal carbonates, metal oxides, metal sulfates, magnesium silicates, or any combination thereof.

9. The aerosol device of claim 7, wherein the water-insoluble powder comprises a mineral powder chosen from calcium carbonate, magnesium carbonate, alumina, barium sulfate, magnesium oxide, or any combination thereof.

10. The aerosol device of claim 7, wherein relative to the total weight of the cosmetic composition, the water-insoluble powder is present in an amount ranging from 0.1% to 30% by weight.

11. The aerosol device of claim 1, wherein relative to the total weight of the cosmetic composition, the cosmetic composition comprises a C2-C4 monoalcohol in an amount ranging from 1% to 80% by weight.

12. The aerosol device of claim 1, wherein the cosmetic composition comprises a propellant chosen from air, nitrogen, carbon dioxide, dimethyl ether, n-butane, propane, isobutene, isopentane, 1,1-difluoroethane, or any mixture thereof.

13. The aerosol device of claim 12, wherein relative to the total weight of the composition, the cosmetic composition comprises the propellant in an amount ranging from 15% to 85% by weight.

14. The aerosol device of claim 1, wherein axes of the outlet orifices are coplanar and extend perpendicular to the longitudinal axis of the diffuser.

15. The aerosol device of claim 1, wherein the diffuser comprises a dome-shaped wall comprising the outlet orifices.

16. The aerosol device of claim 1, wherein the body defines a cannula that extends along the longitudinal axis and is inclined relative to a longitudinal axis of the container.

17. A method of shaping hair, the method comprising: spraying the hair with an effective amount of a cosmetic composition comprising a fixing polymer, wherein the cosmetic composition is sprayed from a dispensing head comprising: a body; a diffuser comprising: outlet orifices configured to spray the cosmetic composition in different directions with respect to a longitudinal axis of the diffuser; first and second concentric chambers through which the composition successively passes before it exits the dispensing head via the outlet orifices; a separation skirt that separates the first and second concentric chambers, the separation skirt having at least two apertures configured to allow the cosmetic composition to pass through the separation skirt; and at least one aperture disposed between the first and second concentric chambers that is angularly offset relative to at least one of the outlet orifices.

18. The method of claim 17, wherein the method further comprises rinsing the hair after spraying the cosmetic composition on the hair.

19. The method of claim 17, wherein the method further comprises: wetting the hair before the composition is sprayed onto the hair; and drying the hair after the composition is sprayed onto the hair.

20. An aerosol device comprising: a container comprising a cosmetic composition comprising a fixing polymer; and a dispensing head comprising: a body; and a diffuser comprising: outlet orifices having coplanar axes that extend in a plane that is perpendicular to a longitudinal axis of the diffuser, such that the outlet orifices are configured to spray the cosmetic composition in different coplanar directions that are perpendicular with respect to the longitudinal axis of the diffuser; first and second concentric chambers through which the composition successively passes before it exits the dispensing head via the outlet orifices; a separation skirt that separates the first and second concentric chambers, the separation skirt having at least two apertures configured to allow the cosmetic composition to pass through the separation skirt; and at least one aperture disposed between the first and second concentric chambers being angularly offset relative to at least one of the outlet orifices, wherein the outlet orifices, the first and second concentric chambers, and the separation skirt are symmetrical with respect to the longitudinal axis of the diffuser.

21. The aerosol device of claim 1, wherein the diffuser comprises at least three of the outlet orifices having coplanar axes that extend in the plane perpendicular to the longitudinal axis of the diffuser.

Description

(1) The invention will be better understood on reading the following detailed description of a non-limiting illustrative embodiment thereof and on examining the appended drawing, in which:

(2) FIG. 1 is a side view of a spray device according to the invention,

(3) FIG. 2 is a longitudinal section through the dispensing head of the device in FIG. 1,

(4) FIG. 3 is a perspective view of the closure cap of the device in FIGS. 1 and 2,

(5) FIG. 4 is a longitudinal section of FIG. 3 along IV-IV,

(6) FIGS. 5 and 6 are perspective views of the body of the device in FIGS. 1 and 2,

(7) FIG. 7 is a longitudinal section through the body in FIGS. 5 and 6,

(8) FIGS. 8 and 9 are schematic and partial perspective views of the diffuser in FIGS. 1 and 2,

(9) FIG. 10 is a bottom view along the arrow X in FIGS. 8 and 9,

(10) FIG. 11 is a longitudinal section along XI-XI in FIGS. 8 to 10,

(11) FIG. 12 is a view, similar to FIG. 7, of an alternative embodiment,

(12) FIGS. 13 and 14 are partial longitudinal sections along XIII-XIII and XIV-XIV, respectively, in FIG. 12,

(13) FIG. 15 is a perspective view of the diffuser in FIGS. 12 to 14,

(14) FIG. 16 is a view, similar to FIG. 13, of the diffuser on its own,

(15) FIG. 17 is a view of the diffuser in FIGS. 12 to 16 along the arrow XVII,

(16) FIG. 18 is a side view of the body in FIGS. 12 to 17,

(17) FIG. 19 is a view thereof along the arrow XIX,

(18) FIG. 20 is a cross-sectional view thereof along XX-XX, and

(19) FIG. 21 is a cross-sectional view thereof along XXI-XXI.

(20) FIGS. 1 to 11 show a device 1 for spraying a composition, said device 1 comprising a container 2 containing the composition to be sprayed, and a dispensing head 3 which sits on top of the container 2. The initial pressure in the container is, for example, between 1 and 12 bar at 20° C.

(21) The container 2 may comprise a valve holder cup (not shown) crimped onto a body of the container or formed in another way.

(22) The dispensing head 3 comprises a body 5 arranged on the container 2 and cooperating with a diffuser 7. A closure cap 9, visible in FIGS. 3 and 4, is intended to cover the body 5 and the diffuser 7 when the device is not in use. The cap 9 comprises, for example, an annular relief 10 in order to allow it to be held on the container 2 with snap-fit engagement.

(23) The body 5 and the diffuser 7 are configured to allow the composition to be sprayed in at least two different directions, of which there are four in the example described and are distributed uniformly about the axis Y of the diffuser. For this purpose, the diffuser 7 comprises four outlet orifices 12, visible in FIGS. 8 to 10, which will be described in detail below.

(24) During the spraying of the composition, the composition stream coming from the container firstly passes through a central channel 25 of the body 5, which is intended to allow the composition to pass from the container 2 as far as the diffuser 7. This central channel 25 comprises a straight portion 25a, which extends in the longitudinal axis X of the device above the container, and an oblique portion 25b, which extends along the axis Y of the diffuser 7 and which is inclined by an angle γ relative to the straight portion 25a. The angle γ is of the order of 20 to 30°, for example.

(25) The diffuser 7 comprises a central stem 28 allowing it to be fixed to the body 5, in the oblique portion 25b. It is fixed by being inserted by force and with snap-fit engagement. For this purpose, the central stem 28 comprises a fixation relief 30, such as an annular bead, intended to snap-fit behind a corresponding relief of the body 5.

(26) The central stem 28 has a shoulder 34 in order to guarantee leaktightness.

(27) Two longitudinal grooves 32 formed on the central stem 28 allow the composition to pass from the body 5 towards the diffuser 7. They are diametrically opposite each other in the example described. These grooves 32 are oriented along the axis Y of the diffuser. They may have a cross section that is partially circular.

(28) In the diffuser 7, the composition stream passes through a first inner chamber 15 and a second outer chamber 16 concentric to the first.

(29) The diffuser 7 comprises a separation skirt 18 between the first and second chambers 15 and 16. This separation skirt 18 is pierced with two apertures 20 to allow the composition stream to pass through. The latter is thus separated into four distinct streams, of which two opposite streams each emerge from the apertures 20. These apertures are uniformly distributed on the circumference of the separation skirt 18, being diametrically opposite each other. Each aperture 20 preferably extends along the entire height h1 of the separation skirt 18, as is illustrated in FIG. 11. The height h1 of the separation skirt 18 is of the order of 2.5 or 4 mm, for example.

(30) The second chamber 16 is surrounded by a peripheral skirt 22 of the diffuser 7, said peripheral skirt 22 cooperating with the body 5 in such a way as to ensure the closure of the second chamber 16. The peripheral skirt 22 comprises the four abovementioned outlet orifices 12 for ensuring the discharge of the composition to the outside. These outlet orifices 12 are distributed uniformly about the axis Y of the diffuser 7. They may each extend along the entire height h2 of the peripheral skirt or along only part thereof. This height h2 may be of the order of 1.9 or 5 mm.

(31) The chambers 15 and 16 preferably have respective widths I1 and I2 of the order of 1.2 mm.

(32) The outlet orifices 12 may comprise a lower portion, in the form of a slit of constant width formed in the bottom of the skirt 22, and an upper portion, which has a semicircular cross section and is formed in the top of the skirt 22, extending away from the shoulder 22a. The composition emerges from the device via the upper portion of the outlet orifices 12, the lower portion being masked and closed by the body 5.

(33) The outlet orifices may each have a cross section of between 0.05 and 5 mm.sup.2, preferably between 0.1 and 2 mm.sup.2, for example of the order of 1 mm.sup.2.

(34) The outlet orifices may have any suitable geometric shape. In one embodiment, they may have a circular cross section.

(35) The outlet orifices 12 are offset angularly relative to the apertures 20 of the separation skirt 18. For example, they are each offset by an angle α of the order of 45°, as illustrated in FIG. 10.

(36) The apertures 20 are offset relative to the longitudinal grooves 32. For example, they are offset by an angle β of the order of 90°, as illustrated likewise in FIG. 10.

(37) The body 5 comprises an annular groove 23 intended to receive the peripheral skirt 22 of the diffuser 7. This annular groove 23 is delimited by two concentric ribs 24a and 24b which are configured to engage on each side of the peripheral skirt 22. The two ribs 24a and 24b are continuous. They can bear against shoulders 22a and 18a, which are present on the separation skirt 18 and the peripheral skirt 22 respectively, when the body and the diffuser are assembled. They preferably have respective thicknesses e1 and e2 of the order of 0.7 mm. They form between them a distance d of the order of 1.25 mm. The rib 24b closes the lower portion of the outlet orifices 12.

(38) The annular groove 23 and the ribs 24a and 24b are arranged at an end of the body opposite a mounting skirt 27 for mounting the body 5 on the container 2. The rest of the body, in particular the central channel 25 of the body, is connected to the mounting skirt 27 by a hinge 27a. The mounting skirt is preferably fixed with snap-fit engagement on the container, but it may also be fixed to the latter in another way.

(39) The diffuser 7 has an upper face 35 with a generally curved shape, of which the radius of curvature is, for example, of the order of 6 mm.

(40) The upper face 35 of the diffuser 7 has markers in the form of reliefs 36 with the general shape of a triangle, of which the point is oriented towards the edge of the upper face 35 and towards the peripheral skirt 22 in the alignment of the outlet orifices 12. The upper end 35 of the diffuser 7 likewise has a central depression 37, which has a circular contour and accommodates the injection sprue.

(41) The composition stream undergoes at least two changes of direction in the diffuser 7. As illustrated in FIG. 9, the composition stream thus passes from a first direction A in the grooves 32 to a second direction B in the first chamber 15, the two directions A and B forming between them an angle of 90°. The composition stream then passes from the direction B to a direction C in the second chamber 16, with a change of direction of the order of 180°, then adopts a direction D corresponding to the emergence of the composition through an outlet orifice 12.

(42) An alternative embodiment will now be described with reference to FIGS. 12 to 21. In this example, the outlet orifices 12 are formed in the diffuser 7 directly. They are formed in a curved portion of the diffuser 7, of hemispherical shape, having a radius of curvature of the order of approximately 6 mm.

(43) The orifices 12 are each oriented outwards on an axis Z, which forms an angle δ with the axis Y of the diffuser. The angle δ is less than 90°, such that the resulting spray is of conical shape, with the composition being distributed all around the axis Y. The angle δ may be between 10 and 85°, preferably between 20 and 80°, for example between 30 and 75°, or even between 40 and 70°. It may be of the order of 60°, for example.

(44) The dispensing head in FIGS. 12 to 21 also differs from that of FIGS. 1 to 11 in terms of the shape of the body 5. In this illustrative embodiment, the latter comprises a cannula 25b through which said channel 25 extends, this cannula having a longitudinal axis Y inclined relative to the longitudinal axis X of the container.

(45) In addition, the mounting skirt 27 for mounting the body 5 on the container 2 is connected to the rest of the body by a hinge 27a situated, relative to the longitudinal axis X, on the same side as the inclination of the axis Y, in such a way that the longitudinal axis Y of the cannula of a movable part of the body 5 is substantially parallel to the longitudinal axis X of the container during the dispensing of the composition.

(46) The invention is not limited to the examples that have just been described.

(47) For example, the valve of the container may be triggered by being pushed down rather than by tilting.

(48) The number of outlet orifices may be modified, as may their orientation.

(49) The axes of the outlet orifices, along which axes the sprays are emitted, may or may not be coplanar, or they may or may not be contained in the same cone of axis Y.

(50) The example that follows serves to illustrate the invention.

EXAMPLES

(51) In the examples that follow, all the amounts are indicated as weight percentage of product as active materials relative to the total weight of the composition.

(52) The following compositions were prepared from the compounds indicated in the table below.

(53) TABLE-US-00001 COMPOSITIONS 1 2 3 4 VA/Crotonates/vinyl 1.40 5.25 1.40 5.25 neodecanoate copolymer.sup.1 Polyvinylpyrrolidone.sup.2 0.05 0.05 0.05 0.05 Aminomethylpropanol 0.15 0.55 0.15 0.15 Fragrance 0.28 0.28 0.28 0.28 Water 2.00 2.00 2.00 2.00 Dimethyl ether 75.00 75.00 35.00 35.00 Ethanol qs 100 qs 100 qs 100 qs 100 .sup.1Sold under the trade name Resyn 28 - 2930 by Akzo Nobel .sup.2Sold under the trade name PVP K90 by ISP.

(54) The compositions are packaged in 150 ml aerosol containers.

(55) The aerosol device D1 according to the invention, shown in FIGS. 12 to 21, was used to package the above compositions. It comprises the following characteristics:

(56) a valve equipped with a nozzle with an orifice 0.42 mm in size and a valve body internal restriction orifice 1.60 mm in size,

(57) a dispensing head comprising a cannula which ends with a dome-shaped wall equipped with four outlet orifices of coplanar axes, perpendicular to the longitudinal axis (Y) of the cannula, and uniformly distributed about the axis Y, the four orifices being diametrically opposite in respective pairs. The outlet orifices have a diameter of 0.5 mm. The dispensing head comprises two concentric chambers communicating via two apertures offset by an angle α of the order of 45° relative to the outlet orifices.

(58) A standard aerosol device D2 was used to package the above compositions. It comprises the following characteristics:

(59) a valve equipped with a nozzle with an orifice 0.42 mm in size and an internal restriction orifice 1.6 mm in size,

(60) a dispensing head sold under the name V05.701 by the company Coster, equipped with an outlet orifice having swirl ducts (6 ducts), 0.5 mm in diameter.

(61) The compositions were sprayed in pairs onto a malleable head per ½ head, according to the comparisons described below. In all the cases, the same amount of composition was sprayed.

(62) The performance qualities in terms of styling properties, and in particular the ease of shaping and the manageability, were evaluated by an expert, who gave his evaluation per ½ head, attributing a “+” to the side with better performance, a “−” to the side with poorer performance and an “=” in the case of equivalence.

(63) The results are as follows:

(64) TABLE-US-00002 Comp. 2 in D1 Comp. 2 in D2 Ease of shaping + − Manageability + −

(65) TABLE-US-00003 Comp. 4 in D1 Comp. 4 in D2 Ease of shaping + − Manageability + −

(66) Thus, it was seen that by using the device D1 according to the invention, greater ease of shaping and greater manageability were afforded than with a standard single-diffusion device, and such was the case irrespective of the content of propellant in the composition.

(67) TABLE-US-00004 Comp. 1 in D2 Comp. 2 in D2 Ease of shaping − + Manageability − +

(68) TABLE-US-00005 Comp. 1 in D1 Comp. 2 in D2 Ease of shaping + − Manageability + −

(69) TABLE-US-00006 Comp. 3 in D2 Comp. 4 in D2 Ease of shaping − + Manageability − +

(70) TABLE-US-00007 Comp. 3 in D1 Comp. 4 in D2 Ease of shaping + − Manageability + −

(71) Moreover, it was observed that by using a standard single-diffusion diffuser, greater ease of shaping and greater manageability were obtained by using a composition with a higher concentration of fixing polymer than with a composition with a lower concentration of fixing polymer. However, it was also observed that by using the device according to the invention for spraying a composition with a lower concentration of fixing polymer, greater ease of shaping and greater manageability were afforded than with a standard device spraying a composition with a higher concentration of fixing polymer.