EP3397351A1

EP3397351A1 - Anhydrous antiperspirant composition in aerosol form comprising an antiperspirant active agent and a vinylpyrrolidone-derived polymer

Info

Publication number: EP3397351A1
Application number: EP16820284.4A
Authority: EP
Inventors: Laure Ramos-Stanbury; Xavier Jalenques
Original assignee: LOreal SA
Current assignee: LOreal SA
Priority date: 2015-12-28
Filing date: 2016-12-23
Publication date: 2018-11-07
Also published as: FR3046056A1; BR112018012632A2; FR3046056B1; WO2017114786A1

Abstract

The present invention relates to an anhydrous composition in aerosol form containing: i) an oily phase comprising: - at least one volatile oil, - at least one antiperspirant active agent chosen from aluminium and/or zirconium salts or complexes, - at least one vinylpyrrolidone-derived polymer; and ii) at least one propellant. Another subject of the invention is a cosmetic process for treating human perspiration, and optionally the body odours associated with human perspiration, especially underarm odours, comprising the application of said composition to a surface of the skin. Finally, a subject of the invention is a use and an aerosol device using the said cosmetic composition.

Description

Anhydrous antiperspirant composition in aerosol form comprising an antiperspirant active agent and a vinylpyrrolidone-derived polymer

The present invention relates to an anhydrous antiperspirant composition in aerosol form comprising, in a physiologically acceptable, in particular cosmetically acceptable, medium, i) an oily phase comprising:

- at least one volatile oil,

- at least one antiperspirant active agent chosen from aluminium and/or zirconium salts or complexes,

- at least one vinylpyrrolidone-derived polymer; and

ii) at least one propellant.

Another subject of the invention is a cosmetic process for treating human perspiration, and optionally the body odours associated with human perspiration, especially underarm odours, comprising the application of said composition to a surface of the skin.

The present invention also relates to the use of said cosmetic composition and also to an aerosol device using it. The armpits and also certain other parts of the body are generally the site of much discomfort that may arise directly or indirectly from perspiration. This perspiration often leads to unpleasant and disagreeable sensations that are mainly due to the presence of sweat resulting from perspiration, which may, in certain cases, make the skin clammy and clothing wet, especially in the region of the armpits or of the back, thus leaving visible marks. Finally, during its evaporation, sweat may also leave salts and/or proteins on the surface of the skin, which thus results in whitish marks on clothing. Such discomfort is noticed, including in the case of moderate perspiration.

In the cosmetics field, it is thus well known to use, in topical application, antiperspirant products containing substances that have the effect of limiting or even preventing the flow of sweat in order to overcome the problems mentioned above. These products are generally available in the form of roll-ons, sticks, aerosols or sprays. Antiperspirant substances are generally composed of aluminium and/or zirconium salts or complexes, such as aluminium chloride and aluminium hydroxyhalides. These substances make it possible to reduce the flow of sweat.

However, cosmetic compositions based on these antiperspirant substances generally have a tendency to become transferred onto clothing, leaving unsightly, visible marks.

In order to overcome this drawback, antiperspirant compositions containing oils with a refractive index close to those of aluminium salts have been developed. The role of such oils is to reduce the whitish appearance of antiperspirant compositions when they are deposited on the skin and, consequently, to make the marks on clothing less white. The oils used are generally fatty acid esters such as isopropyl myristate or polydimethylsiloxanes. Such compositions have especially been described in patents or patent applications EP 1362885, JP 030951 1 1 and FR 2242969. However, such antiperspirant compositions have the drawback of giving the skin, especially on the armpits, an oily sensation that is unpleasant for the user, and do not make it possible to limit the transfer of antiperspirant products from the skin onto clothing.

There is thus a real need to use antiperspirant cosmetic compositions in aerosol form, which do not have the drawbacks mentioned above, i.e. compositions which become transferred as little as possible onto fabrics and which maintain antiperspirant efficacy.

The applicant has thus discovered, surprisingly, that by applying, to the skin, an anhydrous composition in aerosol form containing an oily phase comprising at least one volatile oil, at least one antiperspirant active agent preferably chosen from aluminium and/or zirconium salts or complexes, at least one vinylpyrrolidone-derived polymer and at least one propellant, it was possible to minimize the problems of transfer of antiperspirant compositions onto fabrics while maintaining antiperspirant efficacy. Thus, the antiperspirant cosmetic composition in aerosol form in accordance with the invention leads to formulations which transfer less onto textiles, thus giving rise to fewer unsightly visible marks on clothing, especially on dark-coloured clothing, compared to a standard antiperspirant composition or an antiperspirant composition containing oils. In particular, the antiperspirant cosmetic composition makes it possible to significantly reduce the whitish marks on clothing, in particular on dark- coloured clothing.

Moreover, the cosmetic composition in aerosol form according to the invention maintains good antiperspirant efficacy.

Thus, the use of vinylpyrrolidone-derived polymers as described below in an antiperspirant composition based on aluminium salts makes it possible to reduce the transfer of unsightly visible marks onto clothing without harming the efficacy of the aluminium salts. Furthermore, the vinylpyrrolidone-derived polymers used prove to be compatible with the aluminium salts since they do not form a macroscopically visible precipitate in the composition.

One subject of the present invention is thus especially an anhydrous composition in aerosol form, containing: i) an oily phase comprising:

- at least one volatile oil,

- at least one vinylpyrrolidone-derived polymer; and

ii) at least one propellant.

The cosmetic composition according to the invention has both good transfer-resistance and antiperspirant properties.

Moreover, the present invention also relates to a cosmetic process for treating human perspiration, and optionally body odours associated with human perspiration, which consists in applying to the surface of a human keratin material an effective amount of the cosmetic composition as described previously.

The process according to the invention is particularly advantageous for treating armpit perspiration, since the composition used does not give an unpleasant oily sensation and transfers less onto clothing, while at the same time efficiently treating perspiration.

The invention also relates to the use of said composition cosmetically treating human perspiration. Other subjects, characteristics, aspects and advantages of the invention will emerge even more clearly on reading the description and the examples that follow.

For the purposes of the present invention, the term "physiologically acceptable medium" is intended to denote a medium that is suitable for the topical administration of a composition. A physiologically acceptable medium is preferentially a cosmetically or dermatologically acceptable medium, i.e. a medium that has no unpleasant colour or appearance, and that is entirely compatible with the topical administration route. 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.

For the purposes of the present invention, the term "anhydrous" is intended to mean a liquid phase having a water content of less than 5% by weight, preferably less than 2% by weight and even more preferably less than 1 % by weight relative to the weight of said composition. It should be noted that the water in question is more particularly bound water, such as the water of crystallization in salts, or traces of water absorbed by the raw materials used in the production of the compositions according to the invention.

The term "human keratin materials" is intended to mean the skin (of the body, face and around the eyes), hair, eyelashes, eyebrows, body hair, nails, lips or mucous membranes.

The term "final composition" is intended to mean the combination of the liquid phase and of the propellant gas.

Antiperspirant active agent

The term "antiperspirant active agent" is intended to mean a salt which, by itself, has the effect of reducing the flow of sweat, of reducing the sensation on the skin of moisture associated with human sweat or of masking human sweat.

As indicated previously, the cosmetic composition comprises one or more antiperspirant active agents preferably chosen from aluminium and/or zirconium salts.

Among the aluminium salts or complexes, mention may be made of aluminium halohydrates. Among the aluminium salts, mention may in particular be made of aluminium chlorohydrate, aluminium chlorohydrex, the aluminium chlorohydrex- polyethylene glycol complex, the aluminium chlorohydrex-propylene glycol complex, aluminium dichlorohydrate, the aluminium dichlorohydrex-polyethylene glycol complex, the aluminium dichlorohydrex-propylene glycol complex, aluminium sesquichlorohydrate, the aluminium sesquichlorohydrex-polyethylene glycol complex, the aluminium sesquichlorohydrex-propylene glycol complex, aluminium sulfate buffered with sodium aluminium lactate.

Aluminium sesquichlorohydrate is especially sold under the trade name Reach 301® by the company Summitreheis.

Aluminium chlorohydrate is in particular sold under the trade names Locron S FLA®, Locron P and Locron L.ZA by the company Clariant; under the trade names Microdry aluminium Chlorohydrate®, Micro-Dry 323®, Chlorhydrol 50, Reach 103 and Reach 501 by the company Summitreheis; under the trade name Westchlor 200® by the company Westwood; under the trade name Aloxicoll PF 40® by the company Guilini Chemie; Cluron 50%® by the company Industria Quimica Del Centra; or Clorohidroxido Aluminio SO A 50%® by the company Finquimica.

Aluminium chlorohydrate, aluminium sesquichlorohydrate and mixtures thereof will more particularly be used.

The antiperspirant aluminium salts may be present in the final composition according to the invention in a content ranging from 0.5% to 25% by weight, preferably in a content ranging from 1 % to 20% and more particularly between 2% and 15% by weight relative to the total weight of the final composition.

Vinylpyrrolidone-de ved polymer

The polymer used within the context of the present invention may be defined as being a derivative of vinylpyrrolidone, more precisely either a copolymer of polyvinylpyrrolidone and a-olefins, or an alkylated polyvinylpyrrolidone derivative. These polymers are lipophilic.

In a preferred embodiment, the polymer used in the composition according to the invention may especially be represented by the following formula (I):

in which the radicals R1 to R12 represent, independently of one another, a straight-chain or branched, saturated C10 to C40 alkyl radical or a hydrogen atom, at least one of said radicals R1 to R12 being other than a hydrogen atom.

The value of y may be equal to 0; x must not be zero.

The polymer used within the context of the invention preferably has at least one radical R comprising 14 to 32 carbon atoms, preferentially from 14 to 26 carbon atoms, and more preferentially from 14 to 22 carbon atoms.

Among alkyl radicals comprising 10 to 40 carbon atoms, mention may be made of the hexadecyl, octadecyl, eicosyl and docosyl radicals.

The weight-average molecular weight of the polymer according to the invention is preferably between 5000 and 30 000, in particular between 6000 and 20 000.

In a particular embodiment of the invention, y is equal to 0 and the radicals R2 to R5 represent hydrogen. At least one of the radicals other than hydrogen preferably comprises from 14 to 32 carbon atoms.

Among the polymers corresponding to this embodiment, mention may be made of triacontyl PVP (CTFA name: tricontyl PVP). Among the commercial products, mention may be made of the products sold by the company ISP under the name ANTARON WP660.

In a preferred embodiment of the invention, y may not be zero. The radicals R1 to R9 and R1 1 and R12 preferably represent hydrogen. R10 preferably comprises from 14 to 32 carbon atoms, more preferably from 14 to 26 atoms and even more preferably from 14 to 22 carbon atoms, and the x/y ratio is preferably between 1/5 and 5/1 .

Among the polymers corresponding to this embodiment, mention may be made of the PVP/hexadecene copolymer (CTFA name) or the PVP/eicosene copolymer (CTFA name). Among the commercial products corresponding to this embodiment, mention may be made of the products sold by the company ISP under the name Antaron V-216 which is a PVP/hexadecene copolymer comprising approximately 15-23% of pyrrolidone units, with a molecular weight of 7300, or under the trade name Antaron V-220 which is a PVP/eicosene copolymer which comprises approximately 20-28% by weight of pyrrolidone units and which has a weight- average molecular weight of 8600.

In a preferred embodiment of the invention, the use of a vinylpyrrolidone- derived polymer as described above also makes it possible to provide, surprisingly and advantageously, the composition according to the invention with a "non-tacky" feel after application to the keratin materials and more particularly to the skin, especially in the underarm region.

The polymer according to the invention has a consistency at room temperature which may be more or less viscous depending on the length of the alkyl chain. It may thus be in liquid form, having a viscosity of the order of 40 to 55 poises (4 to 5.5 Pa.s), in a more pasty form or else in solid form close to the consistency of a wax.

In one embodiment of the invention, the anhydrous composition comprises a single vinylpyrrolidone-derived polymer. In another embodiment of the invention, the anhydrous composition comprises a mixture of two or more vinylpyrrolidone-derived polymers.

The vinylpyrrolidone-derived polymer according to the invention is preferably a "film-forming polymer", that is to say a polymer that is capable of forming, by itself or in the presence of an auxiliary film-forming agent, a continuous film that adheres to a support, especially to keratin materials such as the skin, the hair, the eyelashes or the nails, especially the skin.

The vinylpyrrolidone-derived polymer may be present in the final composition according to the invention in a content ranging from 0.1 to 20% of active material by weight, preferably in a content ranging from 0.5% to 10% by weight, more preferentially in a content ranging from 0.8% to 3% by weight, and even more preferentially ranging from 1 % to 2% by weight, relative to the total weight of the final composition.

Oily phase The antiperspirant composition according to the invention comprises an oily phase, this phase containing at least one volatile oil.

According to a particular embodiment of the present invention, said oily phase may also comprise at least one non-volatile hydrocarbon-based oil.

The term "oil" is intended to mean a fatty substance which is liquid at room 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 fibre in less than one hour, at room temperature and atmospheric pressure.

The volatile oils of the invention are volatile cosmetic oils which are liquid at room temperature with a non-zero vapour pressure, at room 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 fibre at room temperature and atmospheric pressure for at least several hours, and that especially has a vapour pressure strictly less than 10^"3 mmHg (0.13 Pa).

The term "hydrocarbon-based oil" is intended to mean an oil mainly containing 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.

For the purposes of the present invention, the term "liquid phase" or "fluid" is intended to mean the base of the composition without the propellant. Volatile oils

Preferentially, the volatile oil is chosen from volatile hydrocarbon-based oils and volatile silicone oils, or mixtures thereof.

As examples of volatile hydrocarbon-based oil that can 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 Cs-Ci6 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 Cede esters, isohexyl neopentanoate, and mixtures thereof. Use may also be made of other volatile hydrocarbon-based oils, such as petroleum distillates, especially those sold under the name Shell Solt by Shell; volatile linear alkanes, such as those described in patent application DE10 2008 012 457 from Cognis.

As examples of volatile silicone oils that may be used in the invention, mention may be made of: volatile linear or cyclic silicone oils, especially those with a viscosity≤ 8 centistokes (8x10^"6 m²/s) and especially having from 2 to 7 silicon atoms, these silicones optionally comprising alkyl or alkoxy groups having from 1 to 10 carbon atoms. As volatile silicone oil that may be used in the invention, mention may be made especially of octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, heptamethylhexyltrisiloxane, heptamethyloctyltrisiloxane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane and dodecamethylpentasiloxane;

- volatile linear alkyltrisiloxane oils of general formula (I):

where R represents an alkyl group comprising from 2 to 4 carbon atoms, one or more hydrogen atoms of which may be substituted by a fluorine or chlorine atom.

Among the oils of general formula (I), mention may be made of:

3-butyl-1 ,1 ,1 ,3,5,5,5-heptamethyltrisiloxane,

3-propyl-1 ,1 ,1 ,3,5,5,5-heptamethyltrisiloxane, and

3-ethyl-1 ,1 ,1 ,3,5,5,5-heptamethyltrisiloxane, corresponding to the oils of formula (I) for which R is, respectively, a butyl group, a propyl group or an ethyl group.

The proportion of volatile oil(s) relative to the total amount of oils preferably ranges from 50% to 100% by weight. Preferably, the volatile oils are chosen from hydrocarbon-based oils and more particularly Cs-Ci6 isoalkanes such as isododecane or isohexadecane, or linear Cs-Ci6 alkanes such as an undecane/tridecane mixture.

Even more particularly, isododecane will be chosen.

According to a particular form of the invention, the oily phase also comprises at least one non-volatile oil.

The non-volatile oils may be chosen from hydrocarbon-based oils, silicone oils and fluoro oils, and mixtures thereof. Non-volatile hydrocarbon-based oils

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

- hydrocarbon-based plant oils such as liquid triglycerides of fatty acids having 4 to 24 carbon atoms, for instance heptanoic or octanoic acid triglycerides, or else wheatgerm oil, olive oil, sweet almond oil, palm oil, rapeseed oil, cottonseed oil, alfalfa oil, poppy oil, pumpkin oil, marrow oil, blackcurrant oil, evening primrose oil, millet oil, barley oil, quinoa oil, rye oil, safflower oil, candlenut oil, passionflower oil, musk rose oil, sunflower oil, corn oil, soybean oil, grapeseed oil, sesame seed oil, hazelnut oil, apricot oil, macadamia oil, castor oil, avocado oil, caprylic/capric acid triglycerides, for instance those sold by the company Stearineries Dubois or those sold under the names Miglyol 810, 812 and 818 by the company Dynamit Nobel, jojoba oil and shea butter oil;

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

- synthetic ethers having from 10 to 40 carbon atoms, such as dicaprylyl ether or PPG-14 butyl ether;

- synthetic esters, especially of fatty acids, for instance the oils of formula R1COOR2 in which Ri represents the residue of a linear or branched higher fatty acid comprising from 1 to 40 carbon atoms and R2 represents a hydrocarbon-based chain, which is especially branched, containing from 1 to 40 carbon atoms, with Ri + R₂ > 10, for instance purcellin oil (cetostearyl octanoate), isononyl isononanoate, isopropyl myristate, isopropyl palmitate, C12 to Ci5 alkyl benzoate, hexyl laurate, diisopropyl adipate, 2-ethylhexyl palmitate, 2-octyldodecyl stearate, 2-octyldodecyl erucate, isostearyl isostearate or tridecyl trimellitate; alcohol or polyalcohol octanoates, decanoates or ricinoleates, for instance propylene glycol dioctanoate; hydroxylated esters, for instance isostearyl lactate, octyl hydroxystearate, octyldodecyl hydroxystearate, diisostearyl malate, triisocetyl citrate, and fatty alcohol heptanoates, octanoates or decanoates; polyol esters, for instance propylene glycol dioctanoate, neopentyl glycol diheptanoate or diethylene glycol diisononanoate; and pentaerythritol esters, for instance pentaerythrityl tetraisostearate;

- fatty alcohols which are liquid at room temperature, comprising a branched and/or unsaturated carbon chain having from 12 to 26 carbon atoms, such as octyldodecanol, isostearyl alcohol, 2-butyloctanol, 2-hexyldecanol, 2- undecylpentadecanol or oleyl alcohol; - higher fatty acids, such as oleic acid, linoleic acid or linolenic acid;

- fatty-chain carbonates;

- fatty-chain acetates;

- fatty-chain citrates.

As examples of non-volatile silicone oils that may be used in the invention, mention may be made of: silicone oils, for instance linear or cyclic non-volatile polydimethylsiloxanes (PDMSs); polydimethylsiloxanes comprising alkyl, alkoxy or phenyl groups, which are pendent or at the end of a silicone chain, these groups having from 2 to 24 carbon atoms; and mixtures thereof. As examples of non-volatile fluoro oils that may be used in the invention, mention may be made of optionally partially hydrocarbon-based and/or silicone- based fluoro oils, such as fluorosilicone oils, fluorinated polyethers and fluorosilicones as described in document EP-A-847 752.

Preferably, the non-volatile oils will be chosen from non-volatile hydrocarbon-based oils and more particularly hydrogenated polyisobutene oils such as Parleam®, ethers such as dicaprylyl ether or PPG-14 butyl ether, fatty acid esters such as isopropyl palmitate, isononyl isononanoate or C12-C15 alkyl benzoates, fatty alcohols such as octyldodecanol, and mixtures thereof. Fatty acid esters such as isopropyl palmitate, isononyl isononanoate or C12-C15 alkyl benzoates, and even more particularly isopropyl palmitate, will be more preferentially chosen.

The total amount of oil(s) present in the composition of the invention is preferably in a content ranging from 20% to 90% by weight and more preferentially in a content ranging from 30% to 80% by weight relative to the total weight of the liquid phase (or of the fluid).

Additives

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

Needless to say, those skilled in the art will ensure they choose 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).

Deodorant active agents

According to a particular form of the invention, the compositions may contain at least one deodorant active agent in the liquid phase.

The term "deodorant active agent" is intended to mean any substance capable of reducing, masking or absorbing human body odours, in particular underarm odours.

The deodorant active agents may be bacteriostatic agents or bactericides that act on underarm odour 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 glycehdes (Capmul MCM® from Abitec), glyceryl caprylate or caprate (Dermosoft GMCY® and Dermosoft GMC® 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 odour 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 of glycerol or 1 ,3-propanediol type (Zemea Propanediol sold by Dupont Tate and Lyle BioProducts); or else an enzyme inhibitor such as triethyl citrate; or alum.

The deodorant active agents may also be agents for neutralizing foul- smelling volatile compounds, such as sodium bicarbonate sold by Universal Preserv-A-Chem, magnesium carbonate sold by Buschle & Lepper, calcium carbonate sold by Sensient, zinc oxide sold by Kobo, magnesium oxide sold by Dr. Paul Lohmann, or calcium oxide; amine derivatives such as tromethamine (TRIS AMINO ULTRA sold by Angus (Dow chemical), triethanolamine, triethylamine and ethanolamine.

The deodorant active agents may be present in the composition according to the invention in a proportion of approximately 0.01 % to 20% by weight relative to the total composition, and preferably in a proportion of approximately 0.1 % to 5% by weight relative to the total weight of the final composition.

Moisture absorbers

It is also possible to add moisture absorbers, for instance perlites and preferably expanded perlites.

The cosmetic composition may comprise one or more moisture absorbers chosen from perlites.

Preferably, the cosmetic composition comprises one or more absorbers chosen from expanded perlites. The perlites that may 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 aluminium 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 grey-coloured and has a size of the order of 100 pm. 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 D50 ranging from 0.5 to 50 m and preferably from 0.5 to 40 pm. Preferably, the perlite particles used have an untamped apparent 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 is directly derived 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: weight, 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 are placed on the balance. The solvent is gradually added to the powder, the whole being regularly blended (every 3 to 4 drops) by means of 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. Quick-drying agents

The antiperspirant composition according to the invention may also contain one or more agents for the quick drying of the composition after application to the keratin material. In a preferred embodiment, the quick-drying agents comprise monoalcohols having from 1 to 3 carbon atoms, and more particularly comprise methanol, ethanol, propanol, isopropanol or mixtures thereof.

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, said clays possibly being modified, especially modified montmorillonite clays such as hydrophobic modified bentonites or hectorites, for instance hectorites modified with a Cio to C22 ammonium chloride, for instance hectorite modified with distearyldimethylammonium chloride, for instance 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 hydrophobically treated at the surface, the size of the particles of which is less than 1 μιτι. This is because it is possible to chemically modify the surface of the silica, by chemical reaction generating a reduction in the number of silanol groups present at the surface of the silica. It is especially possible to substitute silanol groups with hydrophobic groups: a hydrophobic silica is then obtained. The hydrophobic groups may be trimethylsiloxyl groups, which are obtained especially by treating fumed silica in the presence of hexamethyldisilazane. Silicas thus treated are known as "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, 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 has in particular a particle size which can 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.

Propellant As indicated previously, the cosmetic composition comprises one or more propellants.

The propellant used in the antiperspirant cosmetic composition according to the invention is chosen from dimethyl ether, volatile hydrocarbons such as propane, isopropane, n-butane, isobutane, n-pentane and isopentane, and mixtures thereof, optionally with at least one chlorohydrocarbon and/or fluorohydrocarbon; 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, difluorodichloronnethane, tetrafluorodichloroethane and 1 ,1 -difluoroethane, especially sold under the trade name Dymel 152 A® by the company DuPont.

Use may also be made, as propellant, of carbon dioxide gas, nitrous oxide, nitrogen or compressed air.

Preferably, the antiperspirant cosmetic composition according to the invention comprises a propellant chosen from volatile hydrocarbons. More preferentially, the propellant is chosen from isopropane, n-butane, isobutane, pentane and isopentane, and mixtures thereof.

The weight ratio between the liquid phase and the propellant gas varies in a ratio from 5/95 to 50/50, preferably from 10/90 to 40/60 and more preferentially from 15/85 to 30/70.

Preferably, the composition according to the invention comprises:

(i) an oily phase comprising, in a physiologically acceptable medium,

- one or more volatile oils chosen from hydrocarbon-based oils,

- one or more antiperspirant active agents chosen from aluminium salts, - one or more vinylpyrrolidone-derived polymers chosen from a polyvinylpyrrolidone/hexadecene copolymer, a polyvinylpyrrolidone/eicosene copolymer or mixtures thereof, ii) one or more propellants.

The invention also relates to a cosmetic process for treating human perspiration, and optionally body odours associated with human perspiration, which consists in applying to the surface of the skin an effective amount of the cosmetic composition as described above.

The application time of the cosmetic composition to 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 process 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 composed of a container comprising an aerosol composition as defined above 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 in an oven at 35°C, a black cotton fabric, which is dry or has been sprayed with artificial^* sweat, is deposited on the imitation leather article. A weight of 2 kg is applied to the fabric. Everything is stretched over the whole length of the deposit. The weight transferred onto the fabric is then measured by virtue of a precision balance (Mettler AX205).

The transfer may also be evaluated by observing the residual deposit on the plate of synthetic leather: the fabric is then scanned with a scanner sold under the trade name Scanner Epson V500 (16-bit grey setting, resolution 300 dpi).

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

The wear property is considered to be very good when the deposit is unchanged after the fabric has been passed over.

It is considered to be good when the deposit is visible after the fabric has been passed over.

It is considered to be poor when the deposit is no longer (or only slightly) visible after the fabric has been passed over. Composition of the artificial sweat:

Tackiness test:

The tackiness may, where appropriate, also be measured to evaluate the tackiness of the compositions according to the invention. This measurement is then carried out according to the protocol described below:

3.75 mg/cm² of product are spread on a specific support composed of a poly(methyl methacrylate) (PMMA) plate to which the Supplale support from Idemitsu is attached. After uniform spreading of the product, the plate with the film is placed under the texture analyzer equipped with a cylindrical probe which is 18 mm in diameter, to which an 18 mm disc of Bioskin support (Bioskin plate black K275 from Maprecos SAS) has been attached - and has been covered with a Supplale support.

The texture analyzer is placed in a glovebox so as to work in a temperature- and humidity-controlled atmosphere.

The probe applies a force of 400 g on the sample.

The apparatus then calculates the force required for the probe to separate from the sample. In the case of the experiment, only the maximum force which represents the strength of the tackiness of the formula at this given moment is retained. This type of measurement is carried out every 30 seconds for 320 seconds.

The evaluation of the tackiness is the following:

The tackiness is considered to be low when the detachment force is less than 60 g.

The tackiness is considered to be medium when the detachment force is between 60 g and 120 g.

The tackiness is considered to be high when the detachment force is greater than 120 g.

Examples

Examples 1 -3: Compositions comprising a vinylpyrrolidone/hexadecene copolvmer (Antaron V-216)

Formulation

The formulations tested in aerosol form comprise a base manufactured according to the process described below and containing the ingredients mentioned in the following table:

Phase Ingredients Example 1 Example 2 Example 3

(according (outside the (outside the to the invention) invention) invention)

A Isopropyl 0.86 30.86 6.86

palmitate (1 )

A Isododecane 30 - 30

(2)

A Cocos nucifera 0.315 0.315 0.315

(coconut) oil (3)

Vinylpyrrolidone 6 6 - /hexadecene A copolymer (4)

A Phenyl 2.355 2.355 2.355

trimethicone (5)

B Disteardimoniu 2.6 2.6 2.6

m hectorite (6)

C Propylene 0.87 0.87 0.87

carbonate(7)

D Aluminium 35 35 35

chlorohydrate

(8)

D Aluminium 15 15 15

sesquichlorohy

drate (9)

Fragrance 7 7 7

(1 ) sold under the trade name Isopropyl Palmitate by the company Cognis (BASF)

(2) sold under the trade name Isododecane by the company Ineos

(3) sold under the trade name refined coconut oil GV 24/26 by the company Sio (ADM)

(4) sold under the trade name Antaron V-216 by the company ISP

(5) sold under the trade name Dow Corning 556 Cosmetic Grade Fluid by the company Dow Corning

(6) sold under the trade name Bentone 38VCG by the company Elementis

(7) sold under the trade name Jeffsol propylene carbonate by the company Huntsman

(8) sold under the trade name Reach 103 by the company Summitreheis

(9) sold under the trade name Reach 301 by the company Summitreheis

Phase A was mixed with stirring. Phase (B) was introduced slowly into phase (A) and the mixture was then left to swell for five minutes. (C) was introduced. The mixture was stirred vigorously until good homogenization was obtained. The aluminium chlorohydrate and the aluminium sesquichlorohydrate (D) were then added portionwise. Stirring was continued to obtain good homogenization. The fragrance was added. The bases thus formulated were packaged in cans and a propellant was added to the above preparations according to the following schemes:

Results regarding the transfer-resistance efficacy

The aerosols corresponding to Example 1 according to the invention and Examples 2 and 3 outside the invention were sprayed under the conditions described above and the results obtained are described in the table below:

Example 1 Example 3

Example 2

(according (outside

(outside the

to the the

invention)

invention) invention)

Transfer to fabric in

mg (average over 8

trials) 56.8 ± 4.7 104.3 ± 20.6 94.4 ± 8.8

Transfer evaluation:

by wear property of Good Poor Poor residual deposit on supplale after transfer

- Example 1 according to the invention, containing Antaron V-216 and isododecane, transfers significantly less onto fabric than Example 3 outside the invention which does not comprise Antaron V-216. - Moreover, the comparison between Example 1 according to the invention and Example 2 outside the invention (comprising Antaron V-216 but not comprising isododecane) shows that good transfer-resistance efficacy is only obtained in the presence of a volatile oil.

Surprisingly, a composition comprising a polymer according to the invention in combination with at least one volatile oil reduces the transfer of the composition comprising the antiperspirant active agents onto the fabric.

Examples 4-5: Compositions comprising a vinylpyrrolidone/eicosene copolymer (Antaron V-220F)

Formulation

Phase Ingredients Example 4 Example

5

(according

to the (outside invention) the

invention)

A Isopropyl palmitate(l ) 2.55 30.86

A lsododecane(2) 28.31 -

A Cocos nucifera (coconut) 0.315 0.315

oil (3)

A Vinylpyrrolidone/eicosene 6

copolymer (4) A Phenyl t methicone (5) 2.355 2.355

B Disteardimonium 2.6 2.6

hecto te (6)

C Propylene carbonate(7) 0.87 0.87

D Aluminium chlorohydrate 35 35

(8)

D Aluminium 15 15

sesquichlorohydrate (9)

Fragrance 7 7

(1 ) sold under the trade name Isopropyl Palmitate by the company Cognis (BASF)

(2) sold under the trade name Isododecane by the company Ineos

(4) sold under the trade name Antaron V-220F by the company ISP

(6) sold under the trade name Bentone 38VCG by the company Elementis

(8) sold under the trade name Reach 103 by the company Summitreheis

(9) sold under the trade name Reach 301 by the company Summitreheis Phase A was mixed with stirring at 45°C. Phase (B) was introduced slowly into phase (A) and the mixture was then left to swell for five minutes. (C) was introduced. The mixture was stirred vigorously until good homogenization was obtained. The aluminium chlorohydrate and the aluminium sesquichlorohydrate (D) were then added portionwise. Stirring was continued to obtain good homogenization. The fragrance was added. The bases thus formulated were packaged in cans and a propellant was added to the above preparations according to the following schemes: Example 4 Example 5

(according to the (outside the

invention) invention)

Preparation 20

Example 4

Preparation 20

Example 5

Isobutane 80 80

Results regarding the transfer-resistance efficacy

The aerosol of Example 4 comprising the PVP/eicosene polymer and isododecane, and the aerosol of Example 5 comprising neither polymer nor isododecane, were sprayed under the conditions described above and the results obtained are described in the table below:

- Example 4 according to the invention, containing Antaron V-220F and isododecane, hardly transfers onto fabric and the deposit has a good resistance to friction. - The comparison between Example 4 according to the invention and Example 5 outside the invention shows that a good transfer-resistance efficacy of the composition is obtained in the presence of polymer combined with a volatile oil.

Examples 5-6: Comparative example with compositions comprising a

vinylpyrrolidone

Formulation

Phase Ingredients Example 6 Example 7

(according to the (outside the invention) invention)

A Isopropyl palmitate(l ) 0.86 0.86

A lsododecane(2) 30 30

A Polyvinylpyrrolidone (3) - 6

A Vinylpyrrolidone/eicosene 6

copolymer (4)

A Phenyl trimethicone (5) 2.355 2.355

A Cocos nucifera (coconut) 0.315 0.315 oil (10)

B Disteardimonium 2.6 2.6 hectorite (6)

C Propylene carbonate(7) 0.87 0.87

D Aluminium chlorohydrate 35 35

(8)

D Aluminium 15 15

sesquichlorohydrate (9)

E Fragrance 7 7 (1) sold under the trade name Isopropyl Palmitate by the company Cognis (BASF)

(2) sold under the trade name Isododecane by the company Ineos

(3) sold under the trade name PVP K 30L by the company ISP

(4) sold under the trade name Antaron V-220F by the company ISP

(6) sold under the trade name Bentone 38VCG by the company Elementis

(8) sold under the trade name Reach 103 by the company Summitreheis

(9) sold under the trade name Reach 301 by the company Summitreheis

(10) sold under the trade name refined coconut oil GV 24/26 by the company Sio (ADM)

Phase A was mixed with stirring at 45°C. Phase (B) was introduced slowly into phase (A) and the mixture was then left to swell for five minutes. (C) was introduced. The mixture was stirred vigorously until good homogenization was obtained. The aluminium chlorohydrate and the aluminium sesquichlorohydrate (D) were then added portionwise. Stirring was continued to obtain good homogenization. The fragrance was added.

Results

Surprisingly, polyvinylpyrrolidone was shown to be unsuitable for formulation environments such as those of the compositions according to the invention.

Examples 8-9: Comparative example with compositions comprising a

vinylpyrrolidone

Formulation

The formulations tested in aerosol form comprise a base manufactured according to the process described below and containing the ingredients mentioned in the following table: Phase Ingredients Example 8 Example 9

(according to the (outside the invention) invention)

A Isopropyl palmitate(l ) 4.29 4 .29

A lsododecane(2) 40 32

A Acrylic acid/isobutyl 16

acrylate/isobornyl acrylate

copolymer (50% in

isododecane)

(3)

A Vinylpyrrolidone/eicosene 8

copolymer (4)

B Disteardimonium 2.6 2.6 hectorite (5)

C Propylene carbonate(6) 0.78 0.78

D Aluminium chlorohydrate 35 35

(7)

D Perlite (8) 1.33 1.33

E Fragrance 8 8

(1) sold under the trade name Isopropyl Palmitate by the company Cognis (BASF)

(2) sold under the trade name Isododecane by the company Ineos

(3) sold under the trade name Mexomere PAS by the company Chimex

(4) sold under the trade name Antaron V-220F by the company ISP

(5) sold under the trade name Bentone 38VCG by the company Elementis

(5) sold under the trade name Jeffsol propylene carbonate by the company Huntsman

(7) sold under the trade name Reach 103 by the company Summitreheis

(8) sold under the trade name Optimat by the company World Minerals

Phase A was mixed with stirring at 45°C. Phase (B) was introduced slowly into phase (A) and the mixture was then left to swell for five minutes. (C) was introduced. The mixture was stirred vigorously until good homogenization was obtained. The aluminium chlorohydrate and the perlite (D) were then added portionwise. Stirring was continued to obtain good homogenization. The fragrance was added. The bases thus formulated were packaged in cans and a propellant was added to the above preparations according to the following schemes:

Results regarding the stickiness

The stickiness of compositions of examples 8 and 9 has been evaluated with a texturometer, at 35°C and 75% RH.

The compositions were sprayed for 2 seconds at 15 cm on Supplale support (commercialized by Idemitsu) and adfixed to a specific support formed by a PMMA (polymethylmethacrylate) plate

After spraying, the plate and the film are placed under the texture analyzer equiped with a 18mm diameter cylindrical probe, on which a 18 mm Bioskin support disk (Bio skin plate black K275 from Maprecos SAS) has been afixed and covered with a Supplale support. The probe applies a force of about 400g on the sample.

The force required for separating the probe from the sample is then evaluated by the device. For the purpose of the present experiment, only the maximum force (representing the intensity of composition stickiness) is considered. The measure is repeated every 30 seconds, for 10 minutes.

Stickiness can be evaluated as follows :

- Stickiness is considered « low » when the peel force needed is below 60g

Stickiness is considered « medium » when the peel force needed is comprised between 60g and 120g

Stickiness is considered « high » when the peel force needed is above 120g The composition according to example 8 was demonstrated to have a low stickiness, while the composition according to example 9 was demonstrated to have a high stickiness.

Claims

1 . Anhydrous connposition in aerosol form containing: i) an oily phase comprising:

- at least one volatile oil; - one or more antiperspirant active agents chosen from aluminium and/or zirconium salts or complexes;

- at least one vinylpyrrolidone-derived polymer; and ii) at least one propellant.

2. Composition according to Claim 1 , characterized in that the aluminium and/or zirconium salts or complexes are chosen from aluminium chlorohydrate, aluminium chlorohydrex, the aluminium chlorohydrex-polyethylene glycol complex, the aluminium chlorohydrex-propylene glycol complex, aluminium dichlorohydrate, the aluminium dichlorohydrex-polyethylene glycol complex, the aluminium dichlorohydrex-propylene glycol complex, aluminium sesquichlorohydrate, the aluminium sesquichlorohydrex-polyethylene glycol complex, the aluminium sesquichlorohydrex-propylene glycol complex, alum salts, aluminium sulfate, preferably aluminium sulfate buffered with sodium aluminium lactate, aluminium zirconium octachlorohydrate, aluminium zirconium pentachlorohydrate, aluminium zirconium tetrachlorohydrate, aluminium zirconium trichlorohydrate, and the aluminium zirconium octachlorohydrex- glycine, aluminium zirconium pentachlorohydrex-glycine, aluminium zirconium tetrachlorohydrex-glycine and aluminium zirconium trichlorohydrex-glycine complexes.

3. Composition according to Claim 2, characterized in that the antiperspirant active agent is aluminium chlorohydrate and/or aluminium sesquichlorohydrate.

4. Composition according to any one of the preceding claims, characterized in that said at least one vinylpyrrolidone-derived polymer is a polymer of the following formula (I): in which the radicals R1 to R12 represent, independently of one another, a straight-chain or branched, saturated C10 to C40 alkyl radical or a hydrogen atom, at least one of said radicals R1 to R12 being other than a hydrogen atom, x not being zero.

5. Composition according to any one of the preceding claims, in which the polymer has a weight-average molecular weight of between 5000 and 30 000, in particular between 6000 and 20 000.

6. Composition according to any one of the preceding claims, in which y is equal to 0 and the radicals R2 to R5 represent hydrogen.

7. Composition according to any one of the preceding claims, in which at least one of the radicals other than hydrogen comprises from 14 to 32 carbon atoms, and preferably from 14 to 26 carbon atoms, more preferably from 14 to 22 carbon atoms.

8. Composition according to any one of the preceding claims, in which y is not zero and the radicals R1 to R9 and R1 1 and R12 represent hydrogen.

9. Composition according to Claim 8, in which R10 comprises from 14 to 32 carbon atoms, preferably 14 to 26 carbon atoms, more preferably from 14 to 22 carbon atoms, and the x/y ratio is preferably between 1/5 and 5/1 .

10. Composition according to any one of the preceding claims, characterized in that said at least one vinylpyrrolidone-derived polymer is chosen from a polyvinylpyrrolidone/hexadecene copolymer, a polyvinylpyrrolidone/eicosene copolymer or mixtures thereof.

1 1 . Composition according to any one of the preceding claims, characterized in that the propellant is chosen from dimethyl ether, volatile hydrocarbons such as n-butane, propane, isopropane, isobutane, pentane and isopentane, and mixtures thereof, optionally with at least one chlorohydrocarbon and/or fluorohydrocarbon.

12. Composition according to any one of the preceding claims, characterized in that the weight ratio between the liquid phase and the propellant gas varies in a ratio from 5/95 to 50/50, preferably from 10/90 to 40/60 and more preferentially from 15/85 to 30/70.

13. Composition according to any one of the preceding claims, characterized in that the volatile oil is chosen from Cs-Ci6 volatile hydrocarbon-based oils, preferably from Cs-Ci6 isoalkanes and linear Cs-Ci6 alkanes, and mixtures thereof, and more particularly isododecane.

14. Composition according to any one of the preceding claims, characterized in that the proportion of volatile oil(s) ranges from 50% to 100% by weight relative to the total amount of oil(s).

15. Composition according to any one of the preceding claims, characterized in that the composition also comprises at least one non-volatile hydrocarbon- based oil, said non-volatile hydrocarbon-based oil being chosen from hydrogenated polyisobutene oils, ethers, fatty acid esters, fatty alcohols and mixtures thereof, and more particularly fatty acid esters and even more particularly isopropyl palmitate.

16. Composition according to any one of the preceding claims, characterized in that it also comprises one or more deodorant active agents and/or moisture absorbers, said moisture absorbers preferably being chosen from perlites, in particular expanded perlites.

17. Use, in an anhydrous composition in aerosol form containing one or more antiperspirant active agents chosen from aluminium and/or zirconium salts or complexes, of at least one vinylpyrrolidone-derived polymer of the following formula (I): in which the radicals R1 to R12 represent, independently of one another, a straight-chain or branched, saturated C10 to C40 alkyl radical or a hydrogen atom, at least one of said radicals R1 to R12 being other than a hydrogen atom, x not being zero, as agent for limiting, reducing and/or preventing the transfer of said composition and/or said aluminium and/or zirconium salts or complexes.

18. Cosmetic process for treating human perspiration, and optionally body odours associated with human perspiration, which consists in applying to the surface of the skin an effective amount of the composition as defined in any one of Claims 1 to 16.

19. Aerosol device composed of a container comprising an aerosol composition as defined according to any one of Claims 1 to 16 and of a means for dispensing said aerosol composition.