Patent Description:
The present invention also relates to a method for the cosmetic treatment of keratinous fibres, in particular human keratinous fibres, such as the hair, comprising the application, to the said keratinous fibres, of the said cosmetic composition sprayed from the said aerosol device.

The invention additionally relates to the use of the said cosmetic composition sprayed from the said aerosol device for the styling, that is to say for the shaping of the fibres and/or the form retention of the hairstyle, and/or the colouring of keratinous fibres, in particular human keratinous fibres, such as the hair.

Styling products are normally used to construct and structure the hairstyle and to give it hold. They are usually provided in the form of spray compositions, such as lacquers or sprays. These compositions generally comprise one or more film-forming polymers, or "fixing polymers", which make possible the formation of a sheathing film on the fibres and/or the formation of microwelds between the fibres, thus ensuring the form retention of the hairstyle and the fixing of the head of hair.

<CIT> discloses an aerosol device comprising polyvinylcaprolactam, calcium carbonate, dimethiconol, ethanol and butane.

These compositions are generally applied to wet hair, which is shaped before carrying out blow drying or drying, or to dry hair, in finishing, after the shaping.

In order to obtain a satisfactory and long-lasting fixing power, it is known practice to incorporate, in styling products, polymers having a high fixing power and/or to increase the concentration of fixing polymer. However, the use of such products results in a certain number of disadvantages.

Although the objective of these products is to ensure the fixing and the hold of the hairstyle over time, they generally have a tendency to make the hairstyle rigid, in particular producing a "helmet effect", often badly received by users. The head of hair, thus made rigid, exhibits a dry and rough feel which is not greatly appreciated by consumers.

Furthermore, when the composition is provided in the spray form, and in particular in the dry, that is to say non-wetting, spray form, large amounts of propellants are necessary in order to obtain satisfactory spraying of the composition over the fibres. However, the use of such amounts of propellants results in the formation of very fine particles (with a mean diameter of less than <NUM>) which can be inhaled by the consumer during the application of the composition. The inhalation of these particles can then result in coughing and irritation, admittedly transitory but nevertheless unpleasant for the consumer.

Some of these compositions can also, in addition, comprise colouring powders, such as pigments or pearlescent agents. These make-up compositions make it possible to deposit colouring and/or pearlescent agents at the surface without threatening the integrity of the fibres and can thus be used to temporarily colour keratinous fibres. In point of fact, compositions of this type generally exhibit the disadvantage of transferring the colouring particles onto the surfaces with which they are brought into contact, such as the hands, the scalp and the clothes of the consumers.

Thus, there exists a real need to make available a composition in the spray form which does not exhibit the abovementioned disadvantages, i.e. which limits, indeed even prevents, the formation of fine particles and which makes it possible to obtain a long-lasting fixing of the hairstyle, with styling effects which persist throughout the day, while conferring a natural and non-rigid appearance on the hairstyle. Furthermore, there exists a need to make available compositions for making up the hair in the spray form which limit, indeed even prevent, the transfer of the colouring particles.

It has been discovered, surprisingly, that the combination, within an aerosol device, of at least one fixing polymer, of at least one specific hydroxylated silicone, of at least one powder, of at least one organic solvent and of dimethyl ether makes it possible to achieve the objectives set out above, in particular to obtain a composition capable of conferring volume and a long-lasting fixing on keratinous fibres while retaining a natural and non-rigid appearance, and also a full-of-body feel, and optionally of colouring keratinous fibres.

The composition of the invention additionally makes it possible to limit the amount of fine particles and thus to be less irritating to consumers.

Moreover, the composition of the invention exhibits optimum spray qualities, in particular a gentle spray which does not ruffle the hairstyle and without blocking.

A subject matter of the present invention is in particular an aerosol device containing a cosmetic composition comprising:.

the ratio by weight of the total amount of the powder(s) to the total amount of the fixing polymer(s) is greater than or equal to <NUM>.

The composition according to the invention confers flexibility and volume on the hair, while retaining a natural appearance and a full-of-body feel. The head of hair styled using the composition of the invention is form-retained without being set rigid and the styling effects which are conferred on it persist throughout the day.

According to a specific embodiment of the invention, the cosmetic composition contained in the aerosol device comprises:.

The sprayed composition according to this embodiment makes it possible to make up the hair without, however, resulting in transfer of colouring onto the hands, the scalp or the clothes of the consumers. In addition, it confers good colouring and fixing properties on the hair, while being more pleasant to use for the consumer.

Another subject-matter of the present invention is a method for the cosmetic treatment, in particular the shaping and/or the colouring, of keratinous fibres, in particular human keratinous fibres, such as the hair, comprising a step of application, to the said keratinous fibres, of a cosmetic composition sprayed from an aerosol device as defined above.

Another subject-matter of the present invention is the use of a cosmetic composition sprayed from an aerosol device as defined above, for the styling, that is to say for the shaping of the fibres and/or the form retention of the hairstyle, and/or the colouring of keratinous fibres, in particular human keratinous fibres, such as the hair.

Other subject-matters, characteristics, aspects and advantages of the invention will become even more clearly apparent on reading the description and the examples which follow.

In that which will follow, and unless otherwise indicated, the limits of a range of values are included in this range, in particular in the expressions "of between" and "ranging from.

The expression "at least one" used in the present description is equivalent to the expression "one or more".

The cosmetic composition contained in the aerosol device according to the invention comprises one or more fixing polymers.

Within the meaning of the present invention, the term "fixing polymer" is understood to mean a polymer which makes possible the fixing of the shaping of keratinous fibres, in particular of the hair.

Preferably, the fixing polymer(s) are chosen from anionic fixing polymers, cationic fixing polymers, amphoteric fixing polymers, non-ionic fixing polymers, and their mixtures.

The anionic fixing polymers which can be used according to the present invention are polymers comprising groups derived from carboxylic, sulfonic or phosphoric acid and have a number-average molecular weight of between approximately <NUM> and <NUM><NUM><NUM>.

The carboxylic groups are provided by unsaturated mono- or dicarboxylic acid monomers, such as those corresponding to the formula (I):
<CHM>
in which n is an integer from <NUM> to <NUM>, A<NUM> denotes a methylene group, optionally connected to the carbon atom of the unsaturated group or to the adjacent methylene group when n is greater than <NUM>, via a heteroatom, such as oxygen or sulfur, R<NUM> denotes a hydrogen atom or a phenyl or benzyl group, R<NUM> denotes a hydrogen atom or a lower alkyl or carboxyl group, and R<NUM> denotes a hydrogen atom, a lower alkyl group or a - CH<NUM>-COOH, phenyl or benzyl group.

In the abovementioned formula, a lower alkyl group preferably denotes a group having from <NUM> to <NUM> carbon atoms and in particular the methyl and ethyl groups.

The anionic fixing polymers having carboxylic groups which are preferred according to the invention are:.

The fixing polymers having units derived from sulfonic acid can be chosen from:.

According to the invention, the anionic fixing polymers are preferably chosen from copolymers of acrylic acid, such as acrylic acid/ethyl acrylate/N-(tert-butyl)acrylamide terpolymers, sold in particular under the name Ultrahold® Strong by BASF, copolymers derived from crotonic acid, such as vinyl acetate/vinyl tert-butylbenzoate/crotonic acid terpolymers and crotonic acid/vinyl acetate/vinyl neododecanoate terpolymers, sold in particular under the name Resyn <NUM>-<NUM> by AkzoNobel, polymers derived from maleic, fumaric or itaconic acids or anhydrides with vinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives and acrylic acid and its esters, such as methyl vinyl ether/monoesterified maleic anhydride copolymers, sold, for example, under the names Gantrez® ES <NUM> or ES <NUM> by ISP, copolymers of methacrylic acid and of ethyl acrylate sold under the name Luvimer® MAE by BASF, and vinyl acetate/crotonic acid copolymers sold under the name Luviset® CA <NUM> by BASF, and vinyl acetate/crotonic acid copolymers grafted with polyethylene glycol sold under the name Aristoflex® A60 by Clariant, vinylpyrrolidone/acrylic acid/lauryl methacrylate terpolymers sold under the name Acrylidone® LM by ISP, the polymer sold under the name Fixate® G-<NUM> by Lubrizol, vinyl acetate/crotonic acid/vinyl p-tert-butylbenzoate copolymers sold under the names Mexomere® PW or PAM by Chimex.

The cationic fixing polymers which can be used according to the present invention are preferably chosen from polymers comprising primary, secondary, tertiary and/or quaternary amine groups forming part of the polymer chain or directly connected to the latter, and having a molecular weight of between <NUM> and approximately <NUM><NUM><NUM> and preferably between <NUM> and <NUM><NUM><NUM>.

Mention may more particularly be made, among these polymers, of the following cationic polymers:.

The marketed products corresponding to this definition are more particularly the products sold under the names Celquat® L <NUM> and Celquat® H <NUM> by AkzoNobel (INCI name: Polyquaternium-<NUM>).

The amphoteric fixing polymers which can be used in accordance with the invention can be chosen from polymers comprising B and C units randomly distributed in the polymer chain, where B denotes a unit deriving from a monomer comprising at least one basic nitrogen atom and C denotes a unit deriving from an acidic monomer comprising one or more carboxylic or sulfonic groups or else B and C can denote groups deriving from zwitterionic carboxybetaine or sulfobetaine monomers;
B and C can also denote a cationic polymer chain comprising primary, secondary, tertiary or quaternary amine groups, in which at least one of the amine groups carries a carboxylic or sulfonic group connected via a hydrocarbon group, or else B and C form part of a chain of a polymer comprising an α,β-dicarboxyethylene unit, one of the carboxylic groups of which has been reacted with a polyamine comprising one or more primary or secondary amine groups.

The more particularly preferred amphoteric fixing polymers corresponding to the definition given above are chosen from the following polymers:.

The more particularly preferred N-substituted acrylamides or methacrylamides according to the invention are the compounds in which the alkyl groups comprise from <NUM> to <NUM> carbon atoms and more particularly N-ethylacrylamide, N-(tert-butyl)acrylamide, N-(tert-octyl)acrylamide, N-octylacrylamide, N-decylacrylamide, N-dodecylacrylamide and the corresponding methacrylamides.

The acidic comonomers are chosen more particularly from acrylic, methacrylic, crotonic, itaconic, maleic or fumaric acid and also the alkyl monoesters, the alkyl group having from <NUM> to <NUM> carbon atoms, of maleic or fumaric acid or anhydride.

The preferred basic comonomers are aminoethyl, butylaminoethyl, N,N'-dimethylaminoethyl and N-(tert-butyl)aminoethyl methacrylates.

Use is made in particular of the copolymers for which the INCI name is Octylacrylamide/acrylates/butylaminoethyl methacrylate copolymer, such as the products sold under the names Amphomer®, Amphomer® LV71 or Balance® <NUM> by AkzoNobel.

(<NUM>) Partially or completely acylated and crosslinked polyaminoamides deriving from polyaminoamides of general formula:
<CHM>
in which R<NUM> represents a divalent group derived from a saturated dicarboxylic acid, from an aliphatic mono- or dicarboxylic acid comprising an ethylenic double bond, from an ester of a lower alkanol having from <NUM> to <NUM> carbon atoms of these acids, or from a group deriving from the addition of any one of the said acids to a bis-primary or bis-secondary amine, and Z denotes a group deriving from a bis-primary, mono- or bis-secondary polyalkylenepolyamine and preferably represents:.

these polyaminoamides being crosslinked by addition reaction of a bifunctional crosslinking agent chosen from epihalohydrins, diepoxides, dianhydrides or bisunsaturated derivatives, by means of from <NUM> to <NUM> mol of crosslinking agent per amine group of the polyaminoamide, and acylated by reaction with acrylic acid, chloroacetic acid or an alkane sultone or their salts.

The saturated carboxylic acids are preferably chosen from acids having from <NUM> to <NUM> carbon atoms, such as adipic acid, <NUM>,<NUM>,<NUM>-trimethyladipic acid and <NUM>,<NUM>,<NUM>-trimethyladipic acid, terephthalic acid or acids comprising an ethylenic double bond, such as, for example, acrylic acid, methacrylic acid or itaconic acid.

The alkane sultones used in the acylation are preferably propane or butane sultone and the salts of the acylating agents are preferably the sodium or potassium salts.

(<NUM>) Polymers comprising zwitterionic units of formula:
<CHM>
in which R<NUM> denotes a polymerizable unsaturated group, such as an acrylate, methacrylate, acrylamide or methacrylamide group, y and z represent an integer from <NUM> to <NUM>, R<NUM> and R<NUM> represent a hydrogen atom or a methyl, ethyl or propyl group, and R<NUM> and R<NUM> represent a hydrogen atom or an alkyl group such that the sum of the carbon atoms in R<NUM> and R<NUM> does not exceed <NUM>. The polymers comprising such units can also comprise units derived from non-zwitterionic monomers, such as dimethyl- or diethylaminoethyl acrylate or methacrylate or alkyl acrylates or methacrylates, acrylamides or methacrylamides, or vinyl acetate. Mention may be made, by way of example, of methyl methacrylate/methyl dimethylcarboxymethylammonioethyl methacrylate copolymers, such as the product sold under the name Diaformer Z-301N or Z-301W by Clariant (INCI name: Acrylates copolymer).

Mention will be made, among the amphoteric fixing polymers mentioned above which are the most particularly preferred according to the invention, of those of family (<NUM>), such as the copolymers for which the INCI name is Octylacrylamide/acrylates/butylaminoethyl methacrylate copolymer, such as the products sold under the name Amphomer®, Amphomer® LV <NUM> or Balance® <NUM> by AkzoNobel, and those of family (<NUM>), such as methyl methacrylate/methyl dimethylcarboxymethylammonioethyl methacrylate copolymers, sold, for example, under the name Diaformer Z-301N or Z-301W by Clariant.

Preferably, the fixing polymer(s) are chosen from non-ionic fixing polymers and their mixtures, and more preferentially from:.

The alkyl groups of the non-ionic polymers mentioned above preferably have from <NUM> to <NUM> carbon atoms.

Use may also be made, according to the invention, of fixing polymers of grafted silicone type comprising a polysiloxane portion and a portion constituted of a non-silicone organic chain, one of the two portions constituting the main chain of the polymer and the other being grafted to said main chain.

These polymers are described, for example, in Patent Applications <CIT>, <CIT>, <CIT> and <CIT>, <CIT> and <CIT>, and <CIT>, <CIT> and <CIT>.

These polymers can be amphoteric, anionic or non-ionic and they are preferably anionic or non-ionic.

Such polymers are, for example, copolymers capable of being obtained by radical polymerization starting from the monomer mixture formed of:.

Other examples of grafted silicone polymers are in particular polydimethylsiloxanes (PDMSs) to which mixed polymer units of the poly((meth)acrylic acid) type and of the poly(alkyl (meth)acrylate) type are grafted via a thiopropylene-type connecting link and polydimethylsiloxanes (PDMSs) to which polymer units of the poly(isobutyl (meth)acrylate) type are grafted via a thiopropylene-type connecting link.

Grafted silicone polymers are, for example, sold under the names Silicone Plus Polymer® VS80 and VA70 by <NUM> (INCI names: Polysilicone-<NUM> and Polysilicone-<NUM> respectively).

Mention may be made, as other type of silicone fixing polymer, of the product Luviflex® Silk sold by BASF (INCI name: PEG/PPG-<NUM>/<NUM> dimethicone/acrylates copolymer).

Use may also be made, as fixing polymers, of functionalized or non-functionalized and silicone or non-silicone cationic, non-ionic, anionic or amphoteric polyurethanes, or their mixtures.

The polyurethanes particularly targeted by the present invention are those described in Patent Applications <CIT>, <CIT>, <CIT> and <CIT>, of which the Applicant Company is the proprietor, and also in Patent Applications <CIT> and <CIT> of BASF and <CIT> of National Starch.

Mention may be made, as polyurethanes particularly highly suitable in the present invention, of the products sold under the names Luviset® PUR and Luviset® Si PUR by BASF (INCI names: Polyurethane-<NUM> and Polyurethane-<NUM> respectively).

Preferably, the fixing polymer(s) are chosen from non-ionic fixing polymers and their mixtures, more preferentially from vinyllactam homopolymers, such as vinylpyrrolidone homopolymers or polyvinylcaprolactam, and vinyllactam copolymers, such as a poly(vinylpyrrolidone/vinyllactam) copolymer, poly(vinylpyrrolidone/vinyl acetate) copolymers or poly(vinylpyrrolidone/vinyl acetate/vinyl propionate) terpolymers, and their mixtures.

Advantageously, the fixing polymer(s) are chosen from vinyllactam homopolymers, such as vinylpyrrolidone homopolymers and polyvinylcaprolactam, and their mixtures, and, better still, the fixing polymer is polyvinylcaprolactam.

The total amount of the fixing polymer(s), present in the cosmetic composition contained in the aerosol device according to the invention, preferably ranges from <NUM>% to <NUM>% by weight, more preferentially from <NUM>% to <NUM>% by weight and better still from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

The cosmetic composition contained in the aerosol device according to the present invention additionally comprises one or more powders.

The powders that can be used according to the present invention are preferably water-insoluble.

Within the meaning of the present invention, the term "water-insoluble" is understood to mean a compound, the solubility of which at spontaneous pH in water at <NUM> and at atmospheric pressure is less than <NUM>%.

The powders can be chosen from fillers, pigments and their mixtures.

Preferably, the composition according to the invention contains one or more styling powder(s).

Within the meaning of the present invention, the term "styling powder" is understood to mean a powder exhibiting a capacity for shaping the head of hair or for the durability of this shaping.

The capacity of the powder for shaping or for the durability of the shaping may in particular be due to its chemical nature and/or its geometric shape and/or its arrangement configuration during the deposition on the keratinous fibre. This is because the irregularities created at the surface of the hairs promote the inter-attachment of the fibres.

The powder can be of any shape, such as lamellar, spherical or oblong, whatever the crystallographic form (for example cubic, hexagonal, orthorhombic, rhombohedral or tetragonal). In a preferred embodiment, the powders are not spherical.

The number-average size of the powder can vary from <NUM> to <NUM>, better still from <NUM> to <NUM> and even more preferentially from <NUM> to <NUM>.

This number-average size corresponds to the size measured from the statistical distribution of the particle sizes for half of the total number of the particles. This size is denoted D50.

In addition, the number-average size of these particles can be measured in the form of a mean value by an observation method with an optical microscope, with an electron microscope, or a particle size analyser using laser diffraction.

In the case where the particles do not exhibit a spherical shape, their number-average size can be determined in the form of a mean of the longest or shortest diameter or of the thickness.

The powder(s) according to the invention can be mineral or organic, preferably mineral.

The powder is preferably chosen from pigments, fillers and their mixtures.

According to a first specific embodiment of the invention, the cosmetic composition contained in the aerosol device according to the present invention comprises one or more powders, at least one of which is chosen from fillers and their mixtures. In this embodiment, the filler is preferably a styling powder.

According to a second specific embodiment of the invention, the cosmetic composition contained in the aerosol device according to the present invention comprises one or more powders, at least one of which is chosen from pigments and their mixtures. In other words, according to this embodiment, the cosmetic composition comprises at least one pigment.

According to a third embodiment of the invention, the cosmetic composition contained in the aerosol device according to the present invention comprises one or more pigments and one or more fillers. In this embodiment, the filler is preferably a styling powder.

Within the meaning of the present invention, the term "filler" is understood to mean natural or synthetic and white or colourless particles whichs exhibit any shape and which are insoluble in the medium of the composition, whatever the temperature at which the composition is manufactured.

The fillers can be organic or inorganic, and of any shape, such as lamellar, spherical or oblong, whatever the crystallographic form (for example cubic, hexagonal, orthorhombic, rhombohedral or tetragonal). In a preferred embodiment, the fillers are not spherical.

Within the meaning of the present invention, the term "pigment" is understood to mean organic or mineral and white or coloured particles of any shape which are insoluble in physiological medium and which confer a colouring on the composition.

The term "mineral" encompasses natural or synthetic chemical compounds which are inorganic. Mineral substances exist mainly in a crystalline form.

Mention may in particular be made, as examples of mineral or inorganic powder, of:.

Examples of organic powders are wool powder, polyamide powder (Nylon® or Orgasol® from Arkema), polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethyl benzoguanamine powder, tetrafluoroethylene powder, poly(methyl methacrylate) powder, cellulose powder, silk powder, silicone powder, silicone rubber powder, powders of synthetic resins, such as a styrene/acrylate copolymer, a divinylbenzene/styrene copolymer, a vinyl resin, a urea resin, a phenolic resin, a fluororesin, tetrafluoroethylene (Teflon®) polymers, a silicone resin, an acrylic resin, a melamine resin, an epoxy resin and a polycarbonate resin, polymeric hollow microspheres, such as those of poly(vinylidene chloride)/acrylonitrile, for example Expancel® (Nobel Industrie), or acrylic acid copolymers (Polytrap® from Dow Corning), silicone resin microbeads (for example Tospearls® from Toshiba), particles formed of polyorganosiloxane elastomers, microcrystalline fibre powder, starch powder, acylated lysine powder, poly-β-alanine, lauryllysine, long-chain alkyl phosphate metal salt powder, metal soap powder, Colour Index (CI) yellow pigments, CI orange pigments and tar-derived pigments prepared in the lake form, and pigments existing in the natural state prepared in the lake form.

The doped or undoped composite powder may also be suitable as base powder intended to undergo a surface treatment. Examples of the latter encompass the powder prepared by coating inorganic dye pigments, such as red iron oxide, with silicic anhydride, powders prepared by coating Nylon with white pigments and powders prepared by coating fillers with ultrafine white pigments.

The mineral powder(s) according to the invention can optionally be surface-modified with organic compounds.

More preferentially, the powder is a mineral powder constituted of one or more water-insoluble mineral compounds.

The water-insoluble mineral compound(s) are preferably chosen from metal carbonates, oxides and sulfates, silicates, modified or unmodified silicas, mica, talc and their mixtures.

Mention may more particularly be made, by way of examples, of the carbonates, oxides and sulfates of alkaline earth metals, such as beryllium, magnesium, calcium, strontium, barium and radium, better still magnesium and calcium; the oxides, sulfates and carbonates of aluminium, gallium and indium; silicates, such as kaolinite or kaolins (natural silicates containing kaolinite), silicates containing magnesium, in particular those containing an amount of magnesium of greater than <NUM>% by weight (on a dry basis), expressed as magnesium oxide, such as Li-Mg-Na silicates, for example Laponite XLG provided by Rockwood; modified or unmodified silicas, better still modified silicas; mica; talc; and their mixtures.

Among the modified silicas, it is preferred to use surface-treated silicas, such as hydrophobic silicas, such as, for example, hydrophobic fumed silica of nanometric size and surface-treated with hexamethyldisilazane, such as the silica sold under the trade name Aerosil R812S or Aerosil R972 by Evonik or HDK H115 by Wacker, or hydrophobic fumed silica surface-treated with dimethylsilane.

More preferentially, the powder(s) are chosen from fillers and more preferentially from calcium carbonate, magnesium carbonate, alumina, barium sulfate, magnesium oxide, kaolinite or kaolins, modified or unmodified silicas, better still modified silicas and even better still hydrophobic fumed silica of nanometric size and surface-treated with hexamethyldisilazane or hydrophobic fumed silica surface-treated with dimethylsilane; mica; talc; and their mixtures.

According to a preferred embodiment, the cosmetic composition contained in the aerosol device according to the present invention comprises calcium carbonate.

According to yet another specific embodiment, the cosmetic composition contained in the aerosol device according to the present invention comprises calcium carbonate and one or more pigments.

The total amount of the powder(s), present in the cosmetic composition contained in the aerosol device according to the invention, preferably ranges from <NUM>% to <NUM>% by weight, more preferentially from <NUM>% to <NUM>% by weight and better still from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

The ratio by weight of the total amount of the powder(s) to the total amount of the fixing polymer(s), which are present in the cosmetic composition contained in the aerosol device according to the invention, is greater than or equal to <NUM> and preferably ranges from <NUM> to <NUM>.

The cosmetic composition contained in the aerosol device according to the present invention additionally comprises at least <NUM>% by weight, with respect to the total weight of the composition, of one or more polydimethylsiloxanes comprising dimethylsilanol end groups.

Mention may be made, as examples of polydimethylsiloxanes comprising dimethylsilanol end groups, also known as polydimethylsiloxanes comprising α,ω-silanol groups, also known under the name of dimethiconol (CTFA), of the oils of the <NUM> series from Rhodia.

Mention may be made of dimethiconol emulsions, for example with anionic surfactants, preferably having a small particle size, such as less than <NUM>, preferably less than <NUM>.

Products which can more particularly be used in accordance with the invention are mixtures, such as the mixtures formed from a polydimethylsiloxane comprising dimethylsilanol end groups, or dimethiconol (CTFA), and from a cyclic polydimethylsiloxane, also known as cyclomethicone (CTFA), or linear polydimethylsiloxane, also known as dimethicone (CTFA), such as the product Q2 <NUM> or also the product <NUM> Fluid sold by Dow Corning.

The total amount of the polydimethylsiloxane(s) comprising dimethylsilanol end groups present in the cosmetic composition contained in the aerosol device according to the invention is preferably greater than or equal to <NUM>% by weight and more preferentially ranges from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

The ratio by weight of the total amount of the fixing polymer(s) to the total amount of the polydimethylsiloxane(s) comprising dimethylsilanol end groups which are present in the cosmetic composition contained in the aerosol device according to the invention is preferably greater than or equal to <NUM>, more preferentially greater than or equal to <NUM>, better still ranges from <NUM> to <NUM> and more preferentially still from <NUM> to <NUM>.

The cosmetic composition contained in the aerosol device according to the present invention can optionally also comprise one or more additional silicones other than the polydimethylsiloxanes comprising dimethylsilanol end groups of the invention.

Preferably, the additional silicone(s) are chosen from polydialkylsiloxanes, in particular polydimethylsiloxanes (PDMS) other than the polydimethylsiloxanes comprising dimethylsilanol end groups of the invention, and organomodified polysiloxanes comprising at least one functional group chosen from amino groups, oxyalkylene groups, aryl groups and alkoxy groups.

Organopolysiloxanes are defined in greater detail in the work by<NPL>. They can be volatile or non-volatile.

The non-volatile silicones which can be used in the composition according to the invention can preferably be non-volatile polydialkylsiloxanes, polyorganosiloxanes modified by organofunctional groups chosen from amine groups, aryl groups, oxyalkylene groups and alkoxy groups, and also their mixtures.

These silicones are more particularly chosen from polydialkylsiloxanes, among which mention may be made mainly of polydimethylsiloxanes comprising trimethylsilyl end groups. The viscosity of the silicones is measured at <NUM> according to Standard ASTM <NUM>, Appendix C.

Mention may be made, among these polydialkylsiloxanes, in a non-limiting way, of the following commercial products:.

The organomodified silicones which can be used in accordance with the invention are silicones as defined above and comprising, in their structure, one or more organofunctional groups attached via a hydrocarbon group.

The organomodified silicones can be polydiarylsiloxanes, in particular polydiphenylsiloxanes, polydialkylsiloxanes and polyalkylarylsiloxanes functionalized by the abovementioned organofunctional groups.

The polyalkylarylsiloxanes are particularly chosen from linear and/or branched polydimethyl/methylphenylsiloxanes and polydimethyl/diphenylsiloxanes with a viscosity ranging from <NUM>-<NUM> to <NUM>-<NUM> m<NUM>/s at <NUM>.

Mention may be made, among these polyalkylarylsiloxanes, by way of examples, of the products sold under the following names:.

Mention may also be made, among the organomodified silicones, of the polyorganosiloxanes comprising:.

The volatile silicones are more particularly chosen from those with a boiling point of between <NUM> and <NUM>, and even more particularly from:.

They are, for example, octamethylcyclotetrasiloxane, sold in particular under the name Volatile Silicone <NUM> by Union Carbide or Silbione <NUM> V <NUM> by Rhodia, decamethylcyclopentasiloxane, sold under the name Volatile Silicone <NUM> by Union Carbide or Silbione <NUM> V <NUM> by Rhodia, and their mixtures.

Mention may also be made of cyclocopolymers of the dimethylsiloxane/methylalkylsiloxane type, such as Volatile Silicone FZ <NUM> sold by Union Carbide, of chemical structure:
<CHM>
Mention may also be made of mixtures of cyclic silicones with organic compounds derived from silicon, such as the mixture of octamethylcyclotetrasiloxane and tetratrimethylsilylpentaerythritol (<NUM>/<NUM>) and the mixture of octamethylcyclotetrasiloxane and oxy-<NUM>,<NUM>'-bis[<NUM>,<NUM>,<NUM>',<NUM>',<NUM>,<NUM>'-hexa(trimethylsilyloxy)neopentane].

Preferably, the additional volatile silicones are chosen from cyclic silicones comprising from <NUM> to <NUM> silicon atoms and linear silicones containing from <NUM> to <NUM> silicon atoms.

Preferably, the additional non-volatile silicones are chosen from polydialkylsiloxanes, more particularly polydimethylsiloxanes other than the polydimethylsiloxanes comprising dimethylsilanol end groups of the invention, which are or are not organomodified.

The additional silicone(s) other than the polydimethylsiloxanes comprising dimethylsilanol end groups of the invention which can be used in the cosmetic composition according to the invention can be chosen from aminosilicones.

The term "aminosilicone" denotes any silicone comprising at least one primary, secondary or tertiary amine or a quaternary ammonium group.

The weight-average molecular weights of these aminosilicones can be measured by gel permeation chromatography (GPC) at ambient temperature (<NUM>) as polystyrene equivalent. The columns used are µ styragel columns. The eluent is THF and the flow rate is <NUM>/min. <NUM>µl of a <NUM>% by weight solution of silicone in THF are injected. Detection is carried out by refractometry and UV spectrometry.

Preferably, the aminosilicone(s) capable of being employed in the context of the invention are chosen from:.

Preferably, the aminosilicones are chosen from the aminosilicones of formula (B). Preferably, the aminosilicones of formula (B) are chosen from the aminosilicones corresponding to the following formulae (C), (D), (E), (F) and/or (G).

According to a first embodiment, the aminosilicones corresponding to the formula (B) are chosen from the silicones known as "trimethylsilyl amodimethicone" corresponding to the formula (C):
<CHM>
in which m and n are numbers such that the sum (n + m) varies from <NUM> to <NUM> and especially from <NUM> to <NUM>, it being possible for n to denote a number from <NUM> to <NUM> and in particular from <NUM> to <NUM> and it being possible for m to denote a number from <NUM> to <NUM> and in particular from <NUM> to <NUM>.

According to a second embodiment, the aminosilicones corresponding to the formula (B) are chosen from the silicones of following formula (D):
<CHM>
in which:.

Preferably, the alkoxy radical is a methoxy radical.

The hydroxy/alkoxy molar ratio preferably ranges from <NUM>:<NUM> to <NUM>:<NUM> and preferably from <NUM>:<NUM> to <NUM>:<NUM> and more particularly is equal to <NUM>:<NUM>.

The weight-average molecular weight (Mw) of these silicones preferably ranges from <NUM> to <NUM><NUM><NUM> and more particularly from <NUM> to <NUM><NUM>.

According to a third embodiment, the aminosilicones corresponding to the formula (B) are chosen from the silicones of following formula (E):
<CHM>
in which:.

The hydroxy/alkoxy molar ratio generally ranges from <NUM>:<NUM> to <NUM>:<NUM> and preferably from <NUM>:<NUM> to <NUM>:<NUM> and more particularly is equal to <NUM>:<NUM>.

The weight-average molecular weight (Mw) of the silicone preferably ranges from <NUM> to <NUM><NUM>, more particularly still from <NUM> to <NUM><NUM> and more particularly from <NUM><NUM> to <NUM><NUM>.

The commercial products comprising silicones of structure (D) or (E) can include, in their composition, one or more other aminosilicones, the structure of which is different from the formula (D) or (E).

A product containing aminosilicones of structure (D) is provided by Wacker under the name Belsil® ADM <NUM>.

A product containing aminosilicones of structure (E) is provided by Wacker under the name Fluid WR <NUM>®.

When these aminosilicones are employed, a particularly advantageous embodiment is their use in the form of an oil-in-water emulsion. The oil-in-water emulsion can comprise one or more surfactants. The surfactants can be of any nature but are preferably cationic and/or non-ionic. The number-average size of the silicone particles in the emulsion generally ranges from <NUM> to <NUM> nanometres. Preferably, in particular as aminosilicones of formula (E), use is made of microemulsions, the mean size of the particles of which ranges from <NUM> to <NUM> nanometres (limits included) and more particularly from <NUM> to <NUM> nanometres (limits included). Thus, use may be made according to the invention of the microemulsions of aminosilicone of formula (E) which are provided under the name Finish CT <NUM> E® or SLM <NUM>® by Wacker.

According to a fourth embodiment, the aminosilicones corresponding to the formula (B) are chosen from the silicones of following formula (F):
<CHM>
in which:.

The weight-average molecular weight (Mw) of these aminosilicones preferably ranges from <NUM> to <NUM><NUM><NUM> and more particularly still from <NUM> to <NUM><NUM>.

A silicone corresponding to this formula is, for example, the Xiameter MEM <NUM> Emulsion from Dow Corning.

According to a fifth embodiment, the aminosilicones corresponding to the formula (B) are chosen from the silicones of following formula (G):
<CHM>
in which:.

A silicone corresponding to this formula is, for example, DC2-<NUM> Amino Fluid from Dow Corning;
c) the aminosilicones corresponding to the formula (H):
<CHM>
in which:.

Such aminosilicones are described in particular in <CIT>.

The said silicones are preferably constituted of repeating units of following general formulae:.

[-(SiMe<NUM>O)xSiMe<NUM>-R-N(R")-R'-O(C<NUM>H<NUM>O)a(C<NUM>H<NUM>O)b-R'-N(H)-R-].

[-(SiMe<NUM>O)xSiMe<NUM>-R-N(R")-R'-O(C<NUM>H<NUM>O)a(C<NUM>H<NUM>O)b-].

The siloxane blocks preferably represent from <NUM> mol% to <NUM> mol% of the total weight of the silicone, more particularly from <NUM> mol% to <NUM> mol%.

The amine content is preferably of between <NUM> and <NUM> meq/g of copolymer in a <NUM>% solution in dipropylene glycol, more particularly between <NUM> and <NUM>.

The weight-average molecular weight (Mw) of the silicone is preferably of between <NUM> and <NUM><NUM><NUM> and more particularly between <NUM><NUM> and <NUM><NUM>.

Mention may in particular be made of the silicones sold under the name Silsoft A-<NUM> or Silsoft A+ by Momentive. g) and their mixtures.

Preferably, the additional silicones other than the polydimethylsiloxanes comprising dimethylsilanol end groups of the invention are chosen from polydialkylsiloxanes, more particularly polydimethylsiloxanes, which are or are not organomodified, preferably non-organomodified polydimethylsiloxanes.

Preferably, the composition according to the invention comprises one or more additional silicone(s) other than the polydimethylsiloxanes comprising dimethylsilanol end groups of the invention.

When the cosmetic composition also comprises one or more additional silicones, the total amount of additional silicone other than the polydimethylsiloxanes comprising dimethylsilanol end groups of the invention, which are present in the said composition, preferably ranges from <NUM>% to <NUM>% by weight, more preferentially from <NUM>% to <NUM>% by weight and better still ranges from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

When the cosmetic composition also comprises one or more additional silicones, the total amount of the silicones, which are present in the said composition (i.e. corresponding to the total amount of all of the silicones present in the cosmetic composition, that is to say polydimethylsiloxanes comprising dimethylsilanol end groups and the additional silicone(s)), is preferably greater than or equal to <NUM>% by weight, more preferentially greater than or equal to <NUM>% by weight and better still ranges from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

The cosmetic composition contained in the aerosol device according to the present invention additionally comprises one or more organic solvents.

According to the invention, an organic solvent is liquid at ambient temperature (<NUM>) and atmospheric pressure (<NUM> mmHg).

Preferably, the organic solvent(s) are chosen from linear or branched monoalcohols having from <NUM> to <NUM> carbon atoms and more preferentially from <NUM> to <NUM> carbon atoms, polyols, polyethylene glycols, aromatic alcohols and their mixtures.

Mention may in particular be made, as examples of organic solvents which can be used according to the invention, of ethanol, propanol, butanol, isopropanol, isobutanol, propylene glycol, dipropylene glycol, isoprene glycol, butylene glycol, glycerol, sorbitol, benzyl alcohol, phenoxyethanol and their mixtures.

Preferably, the organic solvent(s) are chosen from linear or branched monoalcohols having from <NUM> to <NUM> carbon atoms and their mixtures, and more preferentially from ethanol, propanol, butanol, isopropanol, isobutanol and their mixtures, and better still the organic solvent is ethanol.

The total amount of the organic solvent(s) present in the cosmetic composition contained in the aerosol device according to the invention is preferably greater than or equal to <NUM>% by weight and more preferentially ranges from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

Preferably, the composition according to the invention comprises an amount of water of less than <NUM>% by weight, preferentially of less than <NUM>% by weight and better still of less than <NUM>% by weight, with respect to the total weight of the composition.

The cosmetic composition contained in the aerosol device according to the present invention additionally comprises one or more propellants, at least one of which is dimethyl ether.

In other words, the cosmetic composition contained in the aerosol device according to the invention comprises dimethyl ether and optionally one or more additional propellants other than dimethyl ether.

The additional propellant(s) other than dimethyl ether which can be used according to the invention are preferably chosen from liquefied gases and their mixtures, more preferentially from chlorinated and/or fluorinated hydrocarbons, such as trichlorofluoromethane, dichlorodifluoromethane, chlorodifluoromethane, <NUM>,<NUM>,<NUM>,<NUM>-tetrafluoroethane, chloropentafluoroethane, <NUM>-chloro-<NUM>,<NUM>-difluoroethane or <NUM>,<NUM>-difluoroethane; volatile hydrocarbons, which are optionally halogenated, such as, in particular, C<NUM> to C<NUM> alkanes, such as propane, isopropane, n-butane, isobutane, pentane and their mixtures, more preferentially from C<NUM> to C<NUM> alkanes and their mixtures, and better still from propane, isopropane, n-butane, isobutane and their mixtures.

When the cosmetic composition contained in the aerosol device comprises one or more additional propellant(s) other than dimethyl ether, the ratio by weight of the total amount of dimethyl ether to the total amount of the additional propellant(s) other than dimethyl ether preferably ranges from <NUM> to <NUM>, more preferentially from <NUM> to <NUM> and better still is equal to <NUM>.

The amount of dimethyl ether present in the cosmetic composition contained in the aerosol device according to the invention is preferably greater than or equal to <NUM>% by weight, more preferentially ranges from <NUM>% to <NUM>% by weight and better still from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

The total amount of the propellant(s), which are present in the cosmetic composition contained in the aerosol device according to the invention (i.e. corresponding to the total amount of all of the propellants present in the cosmetic composition, that is to say dimethyl ether and optionally one or more additional propellants, is preferably greater than or equal to <NUM>% by weight, more preferentially greater than or equal to <NUM>% by weight and better still ranges from <NUM>% to <NUM>% by weight, with respect to the total weight of the composition.

The cosmetic composition contained in the aerosol device according to the present invention can optionally also comprise one or more additives, other than the compounds of the invention, and among which mention may be made of cationic, anionic, non-ionic, amphoteric or zwitterionic surfactants, and their mixtures, non-silicone fatty substances, cationic, anionic, non-ionic or amphoteric polymers, or their mixtures, other than the fixing polymers of the invention, antidandruff agents, anti-seborrhoeic agents, vitamins and provitamins, including panthenol, sunscreens, sequestering agents, plasticizing agents, solubilizing agents, acidifying agents, mineral or organic thickening agents, in particular polymeric thickening agents, antioxidants, hydroxy acids, fragrances and preservatives.

Of course, a person skilled in the art will take care to choose this or these optional additional compound(s) so that the advantageous properties intrinsically attached to the composition according to the invention are not, or not substantially, detrimentally affected by the envisaged addition(s).

The above additives can generally be present in an amount, for each of them, of between <NUM>% and <NUM>% by weight, with respect to the total weight of the composition.

The aerosol device comprising the cosmetic composition according to the present invention is constituted of a container containing the said composition and of a means for spraying the said composition.

The composition according to the invention is advantageously packaged under pressure, in an aerosol device, for example a monobloc device, which comprises a spraying means and a container.

The spraying means is generally constituted of a dispensing valve controlled by a dispensing head, itself comprising a nozzle through which the composition of the invention is sprayed.

The container containing the pressurized composition can be opaque or transparent. It can be made of glass, of polymer or of metal, and can optionally be coated with a protective varnish layer.

Another subject-matter of the invention is a method for the cosmetic treatment of keratinous fibres, in particular human keratinous fibres, such as the hair, comprising a stage of application, to the said keratinous fibres, of a cosmetic composition as defined above and sprayed from an aerosol device as defined above.

The composition according to the invention is generally applied to dry keratinous substances which have optionally been washed with a shampoo.

Preferably, on conclusion of the stage of application of the composition according to the invention, the keratinous fibres are not rinsed.

Another subject-matter of the invention is the use of a cosmetic composition as defined above and sprayed from an aerosol device according to the present invention for the styling and/or the colouring of keratinous fibres, in particular human keratinous fibres, such as the hair, that is to say for the shaping of the fibres and/or the form retention of the hairstyle.

The following examples serve to illustrate the invention without, however, exhibiting a limiting nature.

The following composition (A) according to the invention was prepared from the ingredients, the contents of which are shown in the table below as percentage by weight of active material with respect to the total weight of the composition.

<NUM> grams of composition (A) according to the invention are introduced into an aerosol can equipped with a powder valve and with a direct outlet actuator with a <NUM> nozzle. After crimping on the valve, the aerosol device is pressurized. Composition (A) is subsequently sprayed over locks of hair in the proportion of <NUM> of composition per lock of hair.

The composition according to the invention results in a good colouring of the locks, while conferring fixing, manageability and bestowal of body on them. Furthermore, no transfer of the colouring onto the fingers is observed when passing the fingers along the dry locks.

Composition (B) according to the invention was prepared from the ingredients, the contents of which are shown in the table below as percentage by weight of active material with respect to the total weight of the composition.

<NUM> grams of composition (B) according to the invention are introduced into an aerosol can equipped with a powder valve and with a direct outlet actuator with a <NUM> nozzle. After crimping on the valve, the aerosol device is pressurized. Composition (B) is subsequently sprayed for <NUM> seconds at a distance of <NUM> over locks of hair washed and rinsed beforehand. After a leave-in time of one hour, the locks of hair obtained above were attached to the sample carrier of a Zwick <NUM> testing machine (Zwick, Germany) which makes it possible to measure the resistance of the lock to bending, representative of the power of the composition to bestow body. A bending rod is lowered, imposing a pressure on the lock. A force sensor records the force necessary for the bending of the lock. The maximum bending force is thus determined for each of the locks. The higher the value of the force applied, the greater the bestowal of body on the locks, that is to say that they exhibit more texture. Conversely, the lower the value of the force applied, the lower the bestowal of body on the locks. The evaluation of the bestowal of body was evaluated for <NUM> locks of hair before and after application of composition (B).

The maximum force values obtained for composition (B), before and after application, are given in the table below (mean for <NUM> locks).

The results obtained above show that the resistance of the lock to bending is greater after treatment: this illustrates the body-bestowing performance qualities conferred by composition B of the invention. This is because, after application, the hair is significantly more embodied and texturized.

Composition (B) according to the invention was prepared from the ingredients, the contents of which are shown in the table of Example II.

<NUM> grams of composition (B) according to the invention are introduced into an aerosol can equipped with a powder valve and with a direct outlet actuator with a <NUM> nozzle. After crimping on the valve, the aerosol device is pressurized.

Composition (B) is subsequently sprayed for <NUM> seconds at a distance of <NUM> over locks of hair washed and rinsed beforehand.

After a leave-in time of one hour, the locks of hair obtained above were suspended in a measurement device equipped with a CCD (Charge Coupled Device) camera and provided with a regular system for rotation of the lock.

The camera collects, for each lock, <NUM> images of shadows left by the locks, corresponding to <NUM> different angles of rotation between <NUM>° and <NUM>°. The images are subsequently processed by image analysis: the area of each shadow is determined using software.

The volume is directly related to the mean of the areas which are measured at the different angles.

The greater the mean area of the surfaces of shadows, the greater the volume of the lock.

The evaluation of the volume was carried out on <NUM> locks which have been treated with composition (B) and <NUM> untreated locks.

The means of the areas of the surfaces corresponding, on the one hand, to the <NUM> locks treated with composition (B) and, on the other hand, to the <NUM> untreated locks are given in the table below:.

The results obtained above show that the volume of the locks is significantly greater after treatment with composition (B) of the invention: this shows the performance qualities for improvement in the volume which are conferred by composition B. This is because, after application, the hair has significantly greater volume.

Compositions (C) (composition according to the invention) and (D) (comparative composition) were prepared from the ingredients, the contents of which are shown in the table below as percentage by weight of active material with respect to the total weight of the composition.

Compositions (C) and (D) are packaged in transparent aerosol containers.

It is observed that the comparative composition (D) containing only a hydrocarbon propellant (butane) precipitates, unlike the composition of the invention (C) comprising a DME/butane mixture.

Claim 1:
Aerosol device containing a cosmetic composition comprising:
- one or more fixing polymers,
- one or more powders,
- at least <NUM>% by weight, with respect to the total weight of the composition, of one or more polydimethylsiloxanes comprising dimethylsilanol end groups,
- one or more organic solvents, and
- one or more propellants, at least one of which is dimethyl ether;
the ratio by weight of the total amount of the powder(s) to the total amount of the fixing polymer(s) is greater than or equal to <NUM>.