Description

Title: Aerosol device containing a composition comprising at least one silicone acrylic copolymer and at least one propellant

The present invention relates to an aerosol device containing a composition comprising at least one or more silicone acrylic copolymer(s) and from 30% to 75% by weight of at least one or more propellant(s).

The hair products for shaping and/or form retention of the hairstyle which are the most widespread on the cosmetics market are compositions to be sprayed, such as lacquers and sprays or compositions dispensed in the form of foams. Styling products are normally used to construct and structure the hairstyle and to give it hold. They are essentially formed of an alcoholic or aqueous solution and of one or more materials, generally polymer resins, also known as fixing polymers. These polymers make possible the formation of a sheathing film on the individual hairs and/or of microwelds between the individual hairs, thus ensuring the form retention of the hairstyle.

After application of the hair shaping process, the hair is subjected to stresses, for example heat, humidity, rain, sebum, and gentle and repeated mechanical stresses, which leads to a decline in the performances of fixing the hairstyle after a few hours and thus to a detrimental change in the hold over time.

However, the effects provided by these technologies disappear during the first shampooing operation and it is necessary to reapply them in order to obtain the desired effect. This imposes a more or less long and tedious routine on the consumer. For example, for a blow- drying product, after application of the styling spray, it is necessary to distribute the product uniformly over the entire head of hair and then to carry out a blow drying, which can take from 5 to 45 minutes depending on the result desired.

Conversely, long-lasting shaping products make it possible to definitively modify the structure of the fibre by breaking (reducing) the disulfide bonds which impose the original shape of the individual hair, followed by re-bridging (e.g.: oxidation of the cysteines to give cystine after a mechanical action, such as the insertion of curlers in the case of permanent waves). These products must, however, be reapplied at the root once hair regrowth occurs in order to conserve a uniform result. The results are irreversible and sensitize the individual hair. The superposition of relaxing products, for example, can cause discomfort and, in the long term, lead to real degradation of the fibre which can go as far as breakage.

The object of a semi-permanent styling product is to offer satisfaction as regards the durability of the styling effects after one or more shampooing operations while preserving the integrity of the fibre in order to save the consumer time and improve her safety. The term "styling effect" is understood to mean performances in terms of manageability, provision of body, curl definition, control of volume or contribution of volume as a function of the nature of the hair, sheen, ease of shaping by natural drying, blow-drying and/or flat tongs, and hairsetting. Ideally, it is also expected of this type of product that it be readily removable by means of an action or by a composition acting as a makeup remover.

Furthermore, the product must not generate any static electricity.

There thus exists a need to formulate a treatment, in particular a treatment which confers, on the treated fibre, a sheathing of the fibre, which satisfies the following criteria:

• being adherent to the fibre and remaining perceptible after several shampooing operations,

• allowing the hair to be easily and durably shaped,

• being easily and precisely applied at the roots of the fibres,

• providing good cosmetic qualities,

• being easy to use, without any risk of damaging the individual hair,

• being compatible with conventionally used hair treatments (shampooing, hair conditioning, colouring operations) but also with sebum.

It has now been discovered that the use of an aerosol device comprising a composition containing at least one silicone acrylic copolymer and at least one propellant, optionally combined with the use of a heating tool, for example a hairdryer or a straightening iron, makes it possible to generate a sheathing around the hair fibre which is persistent with respect to shampooing operations and which provides the desired styling properties, while being friendly to the fibre. This sheathing is persistent with respect to shampooing operations. Furthermore, this composition, applied with the aerosol device, has good working qualities, in particular in terms of distribution at the root of the fibres; in particular, it makes it possible to limit the tack and the powdering during application, while conferring good cosmetic properties on the hair, in particular in terms of disentangling dry and wet hair and of strand separation.

The use of an aerosol device makes it possible to facilitate the application and makes possible precise application of the composition at the root of the hair, and thus makes it possible to contribute volume to the hairstyle.

In addition, the composition according to the invention allows the shampooing operations to be spaced apart by limiting the regreasing of the treated hair, confers better volume control, a reduction in frizziness and a gain in manageability. A subject-matter of the invention is thus an aerosol device containing a composition comprising:

(a) at least one silicone acrylic copolymer comprising at least the following units:

- at least one polydimethylsiloxane (PDMS) unit comprising at least two polymerizable radical groups chosen from an acrylic or methacrylic group having from 1 to 6 carbon atoms, and

- at least one alkyl acrylate or methacrylate unit;

(b) one or more propellant(s) in an amount ranging from 30% to 75% by weight, with respect to the total weight of the composition.

The present invention also relates to a process for shaping keratin fibres, in particular human keratin fibres, such as the hair, comprising a stage of application, to said keratin fibres, of a composition dispensed from an aerosol device as defined above.

Another subject-matter of the invention is the use of a composition dispensed from an aerosol device as defined above for the shaping of keratin fibres, in particular human keratin fibres, such as the hair.

It has thus been observed that the fibres thus treated exhibit a sheathing which is persistent with respect to shampooing operations and which makes it possible in particular to improve the shaping of the hair, in particular in terms of gain in volume and of volume persistence, and also in terms of definition of the curls. In addition, the composition used in the process has good working qualities on application (distribution) and after shampooing operations (disentangling of wet and dry hair, strand separation).

Within the meaning of the present invention, the term "sheathing which is persistent with respect to shampooing operations" is understood to mean that the shaping obtained persists after a shampooing operation, preferably after three or more shampooing operations.

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.

The invention is not limited to the examples illustrated. The characteristics of the various examples can in particular be combined within alternative forms which are not illustrated.

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", "between" and "ranging from ... to ...". Moreover, the expressions "at least one" and "at least" used in the present description are equivalent respectively to the expressions "one or more" and "greater than or equal to".

Within the meaning of the present invention, the term "keratin fibres" is understood to mean human keratin fibres and more particularly the hair.

Within the meaning of the present invention, the term "polymer" is understood to mean any material obtained by the (co)polymerization of monomers. These monomers can be identical or different. Unless otherwise indicated, the term polymers thus encompasses both homopolymers and copolymers.

Unless otherwise indicated, when the compounds are mentioned in the present patent application, this is also understood to mean their optical isomers, their geometrical isomers, their tautomers, their salts or their solvates, alone or as a mixture. In particular, acrylic polymers, crotonic polymers, diols comprising at least one carboxylic acid group is also understood to mean their corresponding salts.

■ Composition

The aerosol device according to the invention contains a composition comprising (a) one or more silicone acrylic copolymers as described below, (b) one or more propellants in an amount ranging from 30% to 75% by weight, with respect to the total weight of the composition.

This composition is preferably a composition for shaping keratin fibres, in particular human keratin fibres, such as the hair.

Silicone acrylic copolymer (a)

The composition comprises at least one silicone acrylic copolymer comprising at least the following units:

- at least one polydimethylsiloxane (PDMS) unit comprising at least two polymerizable radical groups preferably chosen from an acrylic or methacrylic group having from 3 to 6 carbon atoms, and

- at least one alkyl acrylate or methacrylate unit.

Preferably, the copolymer according to the invention is water-insoluble. Within the meaning of the present invention, the term "water-insoluble" is understood to mean a compound which is insoluble in water at ordinary temperature (25°C) and at atmospheric pressure (760 mmHg or 1.013 ^c 10 ⁵ Pa). Preferably, the copolymer according to the invention exhibits a solubility in water of less than 5%, better still of less than 1% and more preferentially still of less than 0.1%. The term "alkyl acrylate or methacrylate unit" is understood to mean a unit resulting from an alkyl acrylate or methacrylate monomer.

Preferably, the silicone acrylic copolymer comprises at least two alkyl acrylate or methacrylate units.

The term "polydimethylsiloxanes" (also known, in abbreviation, as PDMSs) is understood to denote, in accordance with what is generally accepted, any organosilicon polymer or oligomer having a linear structure, of variable molecular weight, obtained by polymerization and/or polycondensation of suitably functionalized silanes, and constituted essentially of a repetition of main units in which the silicon atoms are connected together by oxygen atoms (siloxane -Si-O-Si- bond), comprising methyl radicals directly bonded via a carbon atom to said silicon atoms.

The PDMS chains which can be used to obtain the copolymer used according to the invention comprise at least two polymerizable radical groups, preferably located on each end of the chain, that is to say that the PDMS can have, for example, a polymerizable radical group on each of the two ends of the chain.

The term "polymerizable radical group" is understood to mean a radical capable of polymerizing with other radical groups which can polymerize or monomers.

The term "end of the chain" is understood to mean the terminal group of the polydimethylsiloxane unit formed of a dimethylsiloxane group, the polydimethylsiloxane unit comprising two ends each having a terminal group (i.e. dimethylsiloxane group).

Preferably, the polydimethylsiloxane (PDMS) unit comprises at least one polymerizable radical group located on each end of the chain, the polymerizable radical group being chosen from an acrylic or methacrylic group having from 3 to 6 carbon atoms.

Preferably, the polymerizable radical group is a CH2 = CH - CO - O - R1- group, where R1 represents an alkyl radical comprising from 1 to 3 carbon atoms, R1 being divalent.

The copolymers used in the composition are generally obtained according to the usual methods of polymerization and of grafting, for example by radical polymerization (A) of a polyalkylsiloxane comprising at least two polymerizable radical groups (for example located on each end of the chain) and (B) of at least one acrylic or methacrylic monomer, such as acrylic acid, methacrylic acid or one of their esters, as described, for example, in the documents US-A-5061 481 and US-A-5219 560.

Preferably, the silicone acrylic copolymer is non-ionic. In addition, the silicone acrylic copolymers of the invention are not (poly)oxyalkylenated, in particular neither oxyethylenated nor oxypropylenated. More particularly, the copolymers used in the composition are obtained by radical polymerization (A) of a polydimethylsiloxane comprising a polymerizable group of acrylate or methacrylate type at each end of the chain and (B) of at least one C1-C30, better still Ci- C10 and more preferentially C2-C6 alkyl acrylate or methacrylate monomer.

Preferably, the composition comprises at least one silicone acrylic copolymer comprising at least the following units:

- at least one polydimethylsiloxane (PDMS) unit comprising at least two, preferably two, polymerizable radical groups chosen from an acrylic or methacrylic group having from 1 to 6 carbon atoms, and

- at least one alkyl acrylate or methacrylate unit, the alkyl radical comprising from 1 to 30 carbon atoms, preferentially from 1 to 22 carbon atoms, better still from 1 to 10 carbon atoms and more preferentially from 2 to 6 carbon atoms.

Preferentially, the composition comprises at least one silicone acrylic copolymer comprising at least the following units:

- at least one polydimethylsiloxane (PDMS) unit comprising at least two polymerizable radical groups chosen from a CH2 = CH - CO - O - R1- group, where R1 represents an alkyl radical comprising from 1 to 3 carbon atoms; and

- at least one C ₁ -C ₃₀ , preferably C ₁ -C ₂₂ , preferentially C ₁ -C ₁₀ and better still C ₂ -C ₆ alkyl acrylate or methacrylate unit.

More particularly still, the composition according to the invention comprises at least one silicone acrylic copolymer comprising at least the following units:

- at least one polydimethylsiloxane (PDMS) unit comprising at least two polymerizable radical groups chosen from a CH2 = CH - CO - O - R1- group, where R1 represents an alkyl radical comprising from 1 to 3 carbon atoms; and

- at least one C ₁ -C ₂₂ , preferentially C ₁ -C ₁₀ and better still C ₂ -C ₆ alkyl acrylate or methacrylate unit.

More particularly still, the silicone acrylic copolymer according to the invention is a copolymer with the INCI name isobutylmethacrylate/bis-hydroxypropyl dimethicone acrylate copolymer, such as, for example, the compound sold by Grant Industries under the name Granacrysil BMAS.

It is an isobutyl methacrylate/bis-hydroxypropyl dimethicone acrylate copolymer in solution in isododecane. The silicone acrylic copolymer(s) can be present in a total amount varying from 0.05% to 15% by weight, preferably from 0.1% to 10% by weight and better still from 0.5% to 5% by weight, with respect to the total weight of the composition.

Propellant (b)

The aerosol device according to the invention comprises one or more propellant(s) (b).

The propellants can be chosen from compressed gases or liquefied gases.

Mention may be made, by way of examples of compressed gases, of air, nitrogen, carbon dioxide and their mixtures. Preferably, the compressed gas is carbon dioxide.

Mention may be made, by way of examples of liquefied gases, of dimethyl ether, chlorinated and/or fluorinated hydrocarbons, such as trichlorofluoromethane, dichlorodifluoromethane, chlorodifluoromethane, 1,1,1 ,2-tetrafluoroethane, chloropentafluoroethane, 1-chloro-1,1-difluoroethane or 1,1-difluoroethane, or volatile hydrocarbons, such as, in particular, C3-C5 alkanes, such as propane, isopropane, n- butane, isobutane or pentane, alone or as a mixture. Preferably, the hydrocarbons are chosen from propane, isopropane, n-butane or isobutane, alone or as a mixture.

According to a specific embodiment, the propellant preferably comprises one or more liquefied gases, preferably chosen from C3-C5 alkanes and in particular propane, n-butane or isobutane, alone or as a mixture.

According to the invention, the propellant(s) is (are) present in the composition comprising the other ingredients, or else is (are) present in a separate compartment from the compartment comprising the other ingredients of the composition, within the aerosol device.

When the propellant(s) (b) is (are) in the composition, it (they) is (are) present in a total amount ranging from 30% to 75% by weight, preferably from 35% to 75% by weight, more preferentially from 40% to 70% by weight and better still from 45% to 65% by weight, with respect to the total weight of the composition.

Fatty substance(s)

According to a preferred embodiment, the composition according to the invention additionally comprises at least one or more fatty substances.

The term "fatty substance" is understood to mean an organic compound which is insoluble in water at ordinary temperature (25°C) and at atmospheric pressure (760 mmHg or 1.013x10 ⁵ Pa) (solubility of less than 5%, preferably of less than 1% and more preferentially still of less than 0.1% by weight). They exhibit in their structure at least one hydrocarbon chain comprising at least 6 carbon atoms or a sequence of at least two siloxane groups. In addition, fatty substances are generally soluble in organic solvents under the same temperature and pressure conditions, such as, for example, chloroform, dichloromethane, carbon tetrachloride, ethanol, benzene, toluene, tetrahydrofuran (THF), liquid petrolatum or decamethylcyclopentasiloxane.

The fatty substances of the invention do not contain any salified carboxylic acid groups.

In addition, the fatty substances of the invention are not (poly)oxyalkylenated or (poly)glycerolated ethers.

More particularly, the fatty substance(s) are chosen from C6-C16 alkanes, alkanes of more than 16 carbon atoms, non-silicone oils of animal origin, triglycerides of vegetable or synthetic origin, fluorinated oils, fatty alcohols, esters of fatty acids and/or of fatty alcohols other than triglycerides and non-silicone waxes, in particular vegetable waxes, non silicone waxes, silicones other than the silicone acrylic copolymers described above, and their mixtures.

The term "oil" is understood to mean a "fatty substance" which is liquid at ambient temperature (25°C) and at atmospheric pressure (760 mmHg or 1.013 ^c 10 ⁵ Pa).

The term "non-silicone oil" is understood to mean an oil not containing any silicon (Si) atoms and the term "silicone oil" is understood to mean an oil containing at least one silicon atom.

The oil can be volatile or non-volatile.

The term "volatile oil" is understood to mean an oil capable of evaporating on contact with the skin in less than one hour, at ambient temperature and atmospheric pressure. The volatile oil is a volatile cosmetic oil, which is liquid at ambient temperature. More specifically, a volatile oil exhibits a rate of evaporation of between 0.01 and 200 mg/cm ² /min, limits included.

The term "non-volatile oil" is understood to mean an oil which remains on the skin or the keratin fibre at ambient temperature and atmospheric pressure. More precisely, a non volatile oil exhibits a rate of evaporation which is strictly less than 0.01 mg/cm ² /min.

It should be remembered that fatty alcohols, esters and acids more particularly exhibit at least one saturated or unsaturated and linear or branched hydrocarbon group comprising from 6 to 30 and better still from 8 to 30 carbon atoms, which is optionally substituted, in particular by one or more hydroxyl groups (in particular 1 to 4). If they are unsaturated, these compounds can comprise one to three conjugated or non-conjugated carbon- carbon double bonds.

Preferably, the composition comprises one or more oil(s) chosen from C _S -C _M alkanes and/or their mixtures.

As regards the C _S -C _M alkanes, the latter can be linear or branched or optionally cyclic.

Mention may in particular be made of branched C _S -C _M alkanes, such as C _S -C _M isoalkanes (also known as isoparaffins), isododecane, isodecane or isohexadecane, and for example the oils sold under the Isopar or Permethyl trade names, and their mixtures.

Mention may also be made of linear alkanes, preferably of vegetable origin, comprising from 7 to 15 carbon atoms, in particular from 9 to 14 carbon atoms and more particularly from 11 to 13 carbon atoms.

Mention may be made, as examples of linear alkanes suitable for the invention, of n- heptane (C ₇ ), n-octane (Cs), n-nonane (Cg), n-decane (C10), n-undecane (Cn), n- dodecane (C12), n-tridecane (C13), n-tetradecane (CM), n-pentadecane (C15) and their mixtures, and in particular of the mixture of n-undecane (Cn) and n-tridecane (C ₁₃ ) described in example 1 of the patent application WO 2008/155059 of Cognis.

Mention may also be made of n-dodecane (C12) and n-tetradecane (CM) sold by Sasol respectively under the references Parafol 12-97 and Parafol 14-97, and also their mixtures.

Mention may be made, as examples of alkanes suitable for the invention, of the alkanes described in the patent applications WO 2007/068371 and WO 2008/155059. These alkanes are obtained from fatty alcohols, which are themselves obtained from coconut oil or palm oil.

According to a specific embodiment, the composition comprises isododecane. Such a compound is, for example, the isododecane sold under the reference Isododecane by Ineos.

Preferably, the composition according to the invention comprises one or more oil(s) chosen from C _S -C _M alkanes, more preferentially from isododecane, isohexadecane, tetradecane and/or their mixtures. The linear or branched alkanes of inorganic or synthetic origin, with more than 16 carbon atoms, are preferably chosen from liquid paraffins, petrolatum, liquid petrolatum, polydecenes or hydrogenated polyisobutene, such as Parleam®, and their mixtures. The triglycerides of vegetable or synthetic origin are preferably chosen from liquid triglycerides of fatty acids comprising from 6 to 30 carbon atoms, such as heptanoic or octanoic acid triglycerides, or also more particularly from those present in vegetable oils, such as, for example, sunflower oil, corn oil, soybean oil, marrow oil, grapeseed oil, sesame oil, hazelnut oil, apricot oil, macadamia oil, arara oil, castor oil, avocado oil, jojoba oil or shea butter oil, or synthetic triglycerides of caprylic/capric acids, such as those sold by Stearineries Dubois or those sold under the names Miglyol® 810, 812 and 818 by Dynamit Nobel, and their mixtures.

Mention may be made, as fluorinated oils, of perfluoromethylcyclopentane and perfluoro- 1,3-dimethylcyclohexane, sold under the names Flutec® PC1 and Flutec® PC3 by BNFL Fluorochemicals; perfluoro-1,2-dimethylcyclobutane; perfluoroalkanes, such as dodecafluoropentane and tetradecafluorohexane, sold under the names PF 5050® and PF 5060® by 3M, or also bromoperfluorooctyl, sold under the name Foralkyl® by Atochem; nonafluoromethoxybutane and nonafluoroethoxyisobutane; perfluoromorpholine derivatives, such as 4-(trifluoromethyl)perfluoromorpholine, sold under the name PF 5052® by 3M.

The fatty alcohols which are suitable for the implementation of the invention are more particularly chosen from saturated or unsaturated and linear or branched alcohols comprising from 6 to 30 carbon atoms, preferably from 8 to 30 carbon atoms. Mention may be made, for example, of cetyl alcohol, isostearyl alcohol, stearyl alcohol and their mixture (cetylstearyl alcohol), octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2- undecylpentadecanol, oleyl alcohol, linolenyl alcohol, ricinoleyl alcohol, undecylenyl alcohol or linoleyl alcohol, and their mixtures.

As regards the esters of fatty acids and/or of fatty alcohols advantageously other than the triglycerides mentioned above and the non-silicone waxes, mention may in particular be made of esters of saturated or unsaturated, linear C1-C26 or branched C3-C26 aliphatic mono- or polyacids and of saturated or unsaturated, linear C1-C26 or branched C3-C26 aliphatic mono- or polyalcohols, the total carbon number of the esters being greater than or equal to 6, more advantageously greater than or equal to 10.

Mention may be made, among the monoesters, of dihydroabietyl behenate; octyldodecyl behenate; isocetyl behenate; cetyl lactate; C12-C15 alkyl lactate; isostearyl lactate; lauryl lactate; linoleyl lactate; oleyl lactate; (iso)stearyl octanoate; isocetyl octanoate; octyl octanoate; cetyl octanoate; decyl oleate; isocetyl isostearate; isocetyl laurate; isocetyl stearate; isodecyl octanoate; isodecyl oleate; isononyl isononanoate; isostearyl palmitate; methylacetyl ricinoleate; myristyl stearate; octyl isononanoate; 2-ethylhexyl isononate; octyl palmitate; octyl pelargonate; octyl stearate; octyldodecyl erucate; oleyl erucate; ethyl and isopropyl palmitates; 2-ethylhexyl palmitate; 2-octyldecyl palmitate; alkyl myristates, such as isopropyl, butyl, cetyl, 2-octyldodecyl, myristyl or stearyl myristate; hexyl stearate; butyl stearate; isobutyl stearate; dioctyl malate; hexyl laurate; 2-hexyldecyl laurate; and their mixtures.

Still within the context of this alternative form, esters of C4-C22 di- or tricarboxylic acids and of C1-C22 alcohols and esters of C2-C26 mono-, di- or tricarboxylic acids and of C1-C26 di-, tri-, tetra- or pentahydroxy alcohols may also be used.

Mention may in particular be made of: diethyl sebacate; diisopropyl sebacate; diisopropyl adipate; di(n-propyl) adipate; dioctyl adipate; diisostearyl adipate; dioctyl maleate; glyceryl undecylenate; octyldodecyl stearoyl stearate; pentaerythrityl monoricinoleate; pentaerythrityl tetraisononanoate; pentaerythrityl tetrapelargonate; pentaerythrityl tetraisostearate; pentaerythrityl tetraoctanoate; propylene glycol dicaprylate; propylene glycol dicaprate; tridecyl erucate; triisopropyl citrate; triisostearyl citrate; glyceryl trilactate; glyceryl trioctanoate; trioctyldodecyl citrate; trioleyl citrate; propylene glycol dioctanoate; neopentyl glycol diheptanoate; diethylene glycol diisononanoate; and polyethylene glycol distearates, and their mixtures.

Among the esters mentioned above, it is preferred to use ethyl, isopropyl, myristyl, cetyl or stearyl palmitate, 2-ethylhexyl palmitate, 2-octyldecyl palmitate, alkyl myristates, such as isopropyl, butyl, cetyl or 2-octyldodecyl myristate, hexyl stearate, butyl stearate, isobutyl stearate, dioctyl malate, hexyl laurate, 2-hexyldecyl laurate, isononyl isononanoate, cetyl octanoate, and their mixtures.

The composition can also comprise, as fatty ester, sugar esters and diesters of C6-C30 and preferably C12-C22 fatty acids. It should be remembered that the term "sugar" is understood to mean oxygen-containing hydrocarbon compounds which have several alcohol functional groups, with or without aldehyde or ketone functional group, and which comprise at least 4 carbon atoms. These sugars can be monosaccharides, oligosaccharides or polysaccharides.

Mention may be made, as suitable sugars, for example, of sucrose, glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose, lactose, and their derivatives, in particular alkyl derivatives, such as methyl derivatives, for instance methylglucose.

The esters of sugars and of fatty acids can in particular be chosen from the group consisting of the esters or mixtures of esters of sugars described above and of saturated or unsaturated and linear or branched C6-C30, preferably C12-C22, fatty acids. If they are unsaturated, these compounds can comprise one to three conjugated or non-conjugated carbon-carbon double bonds.

The esters according to this alternative form can also be chosen from mono-, di-, tri- and tetraesters, polyesters and their mixtures.

These esters can, for example, be oleates, laurates, palmitates, myristates, behenates, cocoates, stearates, linoleates, linolenates, caprates, arachidonates or their mixtures, such as, in particular, mixed oleate/palmitate, oleate/stearate and palmitate/stearate esters.

More particularly, use is made of sucrose, glucose or methylglucose mono- and diesters and in particular mono- or dioleates, -stearates, -behenates, -oleate/palmitates, - linoleates, -linolenates or -oleate/stearates.

Mention may be made, by way of example, of the product sold under the name Glucate® DO by Amerchol, which is a methylglucose dioleate.

Mention may also be made, as examples of sugar esters of fatty acids or of mixtures of sugar esters of fatty acids, of:

- the products sold under the names F160, F140, F110, F90, F70 and SL40 by Crodesta, respectively denoting the sucrose palmitate/stearates formed of 73% monoester and 27% di- and triester, of 61% monoester and 39% di-, tri- and tetraester, of 52% monoester and 48% di-, tri- and tetraester, of 45% monoester and 55% di-, tri- and tetraester, of 39% monoester and 61% di-, tri- and tetraester, and sucrose monolaurate;

- the products sold under the name Ryoto Sugar Esters, for example referenced B370 and corresponding to sucrose behenate formed of 20% monoester and 80% di-, tri- and polyester;

- the sucrose mono- and dipalmitate/stearate sold by Goldschmidt under the name Tegosoft® PSE.

The non-silicone wax(es) are chosen in particular from carnauba wax, candelilla wax, esparto wax, paraffin wax, ozokerite, vegetable waxes, such as olive tree wax, rice wax, hydrogenated jojoba wax or absolute flower waxes, such as the blackcurrant blossom essential wax sold by Bertin (France), or animal waxes, such as beeswaxes or modified beeswaxes (cerabellina); other waxes or waxy starting materials which can be used according to the invention are in particular marine waxes, such as that sold by Sophim under the reference M82, polyethylene waxes or polyolefin waxes in general. The silicones, other than the silicone acrylic copolymers described above, which can be used in the cosmetic composition of the present invention are volatile or non-volatile and cyclic, linear or branched silicones, which are unmodified or modified by organic groups, having a viscosity from 5x1 O ⁶ to 2.5 m ² /s at 25°C and preferably from 1 ^c 10 ⁵ to 1 m ² /s.

The silicones which can be used in accordance with the invention can be provided in the form of oils, waxes, resins or gums, preferably silicone oils.

Preferably, the silicone is chosen from polydialkylsiloxanes, in particular polydimethylsiloxanes (PDMSs), and organomodified polysiloxanes comprising at least one functional group chosen from poly(oxyalkylene) groups, amino groups and alkoxy groups.

Organopolysiloxanes are defined in greater detail in Walter Noll’s Chemistry and Technology of Silicones (1968), Academic Press. They can be volatile or non-volatile.

When they are volatile, the silicones are more particularly chosen from those having a boiling point of between 60°C and 260°C, and more particularly still from: cyclic polydialkylsiloxanes comprising from 3 to 7 and preferably from 4 to 5 silicon atoms. These are, for example, octamethylcyclotetrasiloxane sold in particular under the name Volatile Silicone® 7207 by Union Carbide or Silbione® 70045 V2 by Rhodia, decamethylcyclopentasiloxane sold under the name Volatile Silicone® 7158 by Union Carbide and Silbione® 70045 V5 by Rhodia, and their mixtures.

Mention may also be made of cyclocopolymers of the dimethylsiloxane/methylalkylsiloxane type, such as Volatile Silicone® FZ 3109 sold by Union Carbide, of formula: " ' " '

Mention may also be made of mixtures of cyclic polydialkylsiloxanes with organosilicon compounds, such as the mixture of octamethylcyclotetrasiloxane and tetra(trimethylsilyl)pentaerythritol (50/50) and the mixture of octamethylcyclotetrasiloxane and oxy-1 ,T-bis(2,2,2’,2’,3,3’-hexatrimethylsilyloxy)neopentane ;

(ii) volatile linear polydialkylsiloxanes having from 2 to 9 silicon atoms and exhibiting a viscosity of less than or equal to 5x1 O ⁶ m ² /s at 25°C. It is, for example, decamethyltetrasiloxane sold in particular under the name SH 200 by Toray Silicone. Silicones coming within this category are also described in the paper published in Cosmetics and Toiletries, Vol. 91 , Jan. 76, pages 27-32 - Todd & Byers, Volatile Silicone Fluids for Cosmetics.

Use is preferably made of non-volatile polydialkylsiloxanes, polydialkylsiloxane gums and resins, polyorganosiloxanes modified by the organofunctional groups above, and their mixtures.

These silicones are more particularly chosen from polydialkylsiloxanes, among which mention may be made mainly of polydimethylsiloxanes having trimethylsilyl end groups. The viscosity of the silicones is measured at 25°C according to Standard ASTM 445, Appendix C.

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

- the Silbione® oils of the 47 and 70 047 series or the Mirasil® oils sold by Rhodia, such as, for example, the oil 70 047 V 500 000;

- the oils of the Mirasil® series sold by Rhodia;

- the oils of the 200 series from Dow Corning, such as DC200 having a viscosity of 60 000 mm ² /s;

- the Viscasil® oils from General Electric and some oils of the SF series (SF 96, SF 18) from General Electric.

Mention may also be made of the polydimethylsiloxanes having dimethylsilanol end groups known under the name of dimethiconol (CTFA), such as the oils of the 48 series from Rhodia.

Mention may also be made, in this category of polydialkylsiloxanes, of the products sold under the names Abil Wax® 9800 and 9801 by Goldschmidt, which are polydi(Cr C2o)alkylsiloxanes.

The silicone gums which can be used in accordance with the invention are in particular polydialkylsiloxanes, preferably polydimethylsiloxanes, having high number-average molecular weights of between 200 000 and 1 000000, used alone or as a mixture in a solvent. This solvent can be chosen from volatile silicones, polydimethylsiloxane (PDMS) oils, polyphenylmethylsiloxane (PPMS) oils, isoparaffins, polyisobutylenes, methylene chloride, pentane, dodecane and tridecane or their mixtures.

Products which can more particularly be used in accordance with the invention are mixtures such as: - mixtures formed from a polydimethylsiloxane hydroxylated at the chain end, or dimethiconol (CTFA), and from a cyclic polydimethylsiloxane, also known as cyclomethicone (CTFA), such as the product Q2 1401 sold by Dow Corning;

- mixtures of a polydimethylsiloxane gum and of a cyclic silicone, such as the product SF 1214 Silicone Fluid from General Electric; this product is an SF 30 gum corresponding to a dimethicone, having a number-average molecular weight of 500000, dissolved in the oil SF 1202 Silicone Fluid corresponding to decamethylcyclopentasiloxane;

- mixtures of two PDMSs with different viscosities, and more particularly of a PDMS gum and a PDMS oil, such as the product SF 1236 from General Electric. The product SF 1236 is the mixture of an SE 30 gum defined above, having a viscosity of 20 m ² /s, and of an SF 96 oil, with a viscosity of 5x1 O ⁶ m ² /s. This product preferably comprises 15% of SE 30 gum and 85% of an SF 96 oil.

The organopolysiloxane resins which can be used in accordance with the invention are crosslinked siloxane systems including the following units:

R2S1O2/2, R3S1O1/2, RS1O3/2 and S1O4/2, in which R represents an alkyl having 1 to 16 carbon atoms. Among these products, those which are particularly preferred are those in which R denotes a lower C1-C4 alkyl group, more particularly methyl.

Mention may be made, among these resins, of the product sold under the name Dow Corning 593 or those sold under the names Silicone Fluid SS 4230 and SS 4267 by General Electric, which are silicones of dimethyl/trimethylsiloxane structure.

Mention may also be made of the resins of the trimethylsiloxysilicate type sold in particular under the names X22-4914, X21-5034 and X21-5037 by Shin-Etsu.

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

In addition to the silicones described above, the organomodified silicones can be polydiarylsiloxanes, in particular polydiphenylsiloxanes, and polyalkylarylsiloxanes functionalized by the abovementioned organofunctional groups.

The polyalkylarylsiloxanes are chosen in particular from linear and/or branched polydimethyl/methylphenylsiloxanes and polydimethyl/diphenylsiloxanes with a viscosity ranging from 1 ^c 10 ^-5 to 5x1 O ² m ² /s at 25°C. Mention may be made, among these polyalkylarylsiloxanes, by way of examples, of the products sold under the following names:

- the Silbione® oils of the 70641 series from Rhodia;

- the oils of the Rhodorsil® 70633 and 763 series from Rhodia;

- the oil Dow Corning 556 Cosmetic Grade Fluid from Dow Corning;

- the silicones of the PK series from Bayer, such as the product PK20;

- the silicones of the PN and PH series from Bayer, such as the products PN1000 and PH1000;

- certain oils of the SF series from General Electric, such as SF 1023, SF 1154, SF 1250 and SF 1265.

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

- polyethyleneoxy and/or polypropyleneoxy groups optionally comprising C6-C24 alkyl groups, such as the products named dimethicone copolyol sold by Dow Corning under the name DC 1248 or the oils Silwet® L 722, L 7500, L 77 and L 711 from Union Carbide, and the (Ci2)alkylmethicone copolyol sold by Dow Corning under the name Q2 5200;

- substituted or unsubstituted amino groups, such as the products sold under the names GP 4 Silicone Fluid and GP 7100 by Genesee or the products sold under the names Q2 8220 and Dow Corning 929 or 939 by Dow Corning. The substituted amino groups are in particular C1-C4 aminoalkyl groups;

- alkoxylated groups, such as the product sold under the name Silicone Copolymer F- 755 by SWS Silicones, and Abil Wax® 2428, 2434 and 2440 by Goldschmidt.

The fatty substance(s) are advantageously chosen from alkanes of more than 16 carbon atoms, C6-C16 alkanes, oils or triglycerides of vegetable origin, liquid synthetic triglycerides, fatty alcohols, esters of fatty acids and/or of fatty alcohols other than triglycerides and non-silicone waxes, or their mixtures.

Preferably, the composition according to the invention comprises one or more fatty substance(s) chosen from saturated alkanes comprising a carbon number of between 8 and 16, more preferentially from isododecane, isohexadecane and/or their mixtures.

Preferably, the shaping composition comprises isododecane and/or isohexadecane; more preferentially, the composition according to the invention comprises isododecane.

According to a specific embodiment, the isododecane sold under the reference Isododecane by Ineos is used. The composition according to the invention can comprise one or more fatty substances present in a total amount ranging from 0.1% to 65% by weight, preferably from 0.5% to 60% by weight and better still from 5% to 50% by weight, with respect to the total weight of the composition. More particularly, the composition comprises one or more liquid fatty substances chosen in particular from Cs-Ci ₆ alkanes.

In a specific alternative form of the invention, the composition comprises one or more liquid fatty substances in a total amount ranging from 20% to 60% by weight, preferably from 25% to 50% by weight and better still from 30% to 50% by weight, with respect to the total weight of the composition.

Hydrocarbon block copolymers

According to a preferred embodiment, the composition used according to the invention additionally comprises at least one hydrocarbon block copolymer, preferably a block copolymer which is soluble or dispersible in a liquid fatty phase.

The hydrocarbon block copolymer can in particular be a diblock, triblock, multiblock, radial or star copolymer, or their mixtures.

Preferably, the hydrocarbon block copolymer is a diblock or triblock copolymer.

Within the meaning of the invention, the term "hydrocarbon polymer" is understood to mean a polymer consisting solely of carbon and hydrogen atoms.

Such hydrocarbon block copolymers are described in the patent application US-A- 2002/005562 and in the patent US-A-5221 534.

The copolymer can exhibit at least one block, the glass transition temperature of which is preferably less than 20°C, preferably less than or equal to 0°C, preferably less than or equal to -20°C and more preferably less than or equal to -40°C. The glass transition temperature of said block can be between -150°C and 20°C, in particular between -100°C and 0°C.

The hydrocarbon block copolymer present in the composition according to the invention is a copolymer formed by polymerization of an olefin. The olefin can in particular be an ethylenically unsaturated monomer.

Mention may be made, as examples of olefins, of ethylenic hydrocarbon monomers, having in particular one or two ethylenic unsaturations and having from 2 to 5 carbon atoms, such as ethylene, propylene, butadiene, isoprene or pentadiene.

Advantageously, the hydrocarbon block copolymer is a block copolymer of styrene and of olefin. Block copolymers comprising at least one styrene block and at least one block comprising units chosen from butadiene, ethylene, propylene, butylene, isoprene or one of their mixtures are preferred in particular.

According to a preferred embodiment, the hydrocarbon block copolymer is hydrogenated in order to reduce the residual ethylenic unsaturations after the polymerization of the monomers.

In particular, the hydrocarbon block copolymer is an optionally hydrogenated copolymer having styrene blocks and having ethylene/C3-C4 alkylene blocks.

Mention may be made, as diblock copolymers, which are preferably hydrogenated, of styrene-ethylene/propylene copolymers, styrene-ethylene/butadiene copolymers or styrene-ethylene/butylene copolymers. Diblock polymers are sold in particular under the name Kraton ^® G1701 E by Kraton Polymers. Mention may be made, as triblock copolymers, which are preferably hydrogenated, of styrene-ethylene/propylene-styrene copolymers, styrene-ethylene/butadiene-styrene copolymers, styrene-ethylene/butylene- styrene copolymers, styrene-isoprene-styrene copolymers or styrene-butadiene-styrene copolymers. Triblock polymers are sold in particular under the names Kraton ^® G1650, Kraton ^® G1652, Kraton ^® D1101, Kraton ^® D1102 or Kraton ^® D1160 by Kraton Polymers.

According to one embodiment of the present invention, the hydrocarbon block copolymer is a styrene-ethylene/propylene diblock copolymer, in particular such as the diblock polymers sold under the name Kraton ^® G1701 E by Kraton Polymers.

The hydrocarbon block copolymer(s) can be present in a total amount ranging from 0.01% to 10% by weight, preferably from 0.1% to 8% by weight, more preferentially from 0.5% to 7% by weight and better still from 1% to 5% by weight, with respect to the total weight of the composition.

Solvents

The composition of use according to the invention can comprise one or more organic solvents other than the fatty substances described above.

According to the invention, the solvent(s) is (are) liquid at ambient temperature (25°C) and atmospheric pressure (760 mmHg).

According to one embodiment, the composition according to the invention comprises one or more monoalcohol(s) and/or one or more diol(s).

According to this embodiment, the organic solvent(s) are chosen from monoalcohols or diols. Mention may be made, by way of examples, of linear or branched monoalcohols or diols, which are preferably saturated, comprising from 2 to 10 carbon atoms, such as ethyl alcohol, isopropyl alcohol, hexylene glycol (2-methyl-2,4-pentanediol), neopentyl glycol and 3-methyl-1,5-pentanediol; aromatic alcohols, such as benzyl alcohol or phenylethyl alcohol; glycols or glycol ethers, such as, for example, ethylene glycol monomethyl, monoethyl and monobutyl ethers, propylene glycol or its ethers, such as, for example, propylene glycol monomethyl ether, butylene glycol or dipropylene glycol; and also diethylene glycol alkyl ethers, in particular C1-C4 alkyl ethers, such as, for example, diethylene glycol monoethyl ether or monobutyl ether, alone or as a mixture.

According to one embodiment, linear or branched monoalcohols or diols, which are preferably saturated, comprising from 2 to 10 carbon atoms are preferred, more preferentially monoalcohols comprising from 2 to 10 carbon atoms, better still from 2 to 4 carbon atoms, and more particularly ethanol is preferred.

When it (they) is (are) present, the organic solvent(s) (e) is (are) generally present in a total content ranging from 1% to 90% by weight, preferably from 10% to 80% by weight, more preferentially from 20% to 70% by weight, better still from 30% to 60% by weight and even better still from 35% to 55% by weight, with respect to the total weight of the composition.

The composition of the invention can be anhydrous or aqueous. The composition is preferably anhydrous.

Within the meaning of the present invention, the term "anhydrous composition" is understood to mean that the water content is less than 2% by weight, preferably less than 1% by weight; better still, the composition is devoid of water.

Additives

The composition of use according to the invention can comprise one or more additives(s) generally used in cosmetics. These additives are generally chosen, for example, from anionic, cationic, non-ionic, amphoteric or zwitterionic surfactants or their mixtures, anionic, cationic, non-ionic, amphoteric or zwitterionic polymers, other than those described above, pH agents, reducing agents, softening agents, anti-foaming agents, moisturizing agents, UV screening agents, peptizing agents, solubilizing agents, inorganic or organic thickeners and in particular anionic, cationic, non-ionic and amphoteric polymeric associative thickeners, antioxidants, penetrating agents, sequestering agents, dispersing agents, conditioning agents, such as, for example, film-forming agents, ceramides, preserving agents, opacifying agents or conducting polymers, fragrances, proteins or vitamins, alone or as a mixture. Preferably, the composition of use in the process according to the invention is non colouring.

Within the meaning of the present invention, the term "non-colouring composition" is understood to mean a composition which does not comprise any pigments or dyes intended to colour keratin fibres, in particular the hair.

The term "pigment" is understood to mean a white or coloured solid particle which is naturally insoluble in the hydrophilic and lipophilic liquid phases usually employed in cosmetics or which is rendered insoluble by formulation in the form of a lake, if appropriate. More particularly, the pigment has little or no solubility in aqueous-alcoholic media.

The term "composition not comprising any dyes" is understood more specifically to mean a composition which does not comprise any direct dye or oxidation dye precursor (oxidation base and coupler) or any other compound which, by reaction, gives a coloured entity in the composition or on the fibres, which are usually used for colouring human keratin fibres.

The non-colouring composition according to the invention is preferably devoid of pigment and dye or else, if it comprises at least one pigment and/or at least one dye, their total content does not exceed 0.005% by weight, with respect to the weight of the composition. This is because, at such a content, only the composition would be dyed, that is to say that no dyeing effect would be observed on the keratin fibres.

It should be remembered that oxidation dye precursors, oxidation bases and couplers are colourless or sparingly coloured compounds which, by a condensation reaction in the presence of an oxidizing agent, give a coloured entity. With regard to direct dyes, these compounds are coloured and exhibit a certain affinity for keratin fibres.

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

Preferably, when the composition comprises one or more additives, the total amount of additives varies from 0.01% to 50% by weight, more preferentially from 0.1% to 45% by weight and better still from 1% to 10% by weight, with respect to the total weight of the composition.

Aerosol device The aerosol device according to the present invention comprising the composition consists of a container containing said composition and of a means for spraying said composition, it being possible for the propellant(s) (b) to optionally be in a separate compartment from that comprising the other ingredients of the composition.

Preferably, the aerosol device according to the invention makes it possible to spray said composition in the spray form.

The composition of use 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 formed by a dispensing valve controlled by a dispensing head, itself comprising a nozzle by which the composition of the invention is dispensed in the spray form. The diffusion can be flat or conical.

The means for dispensing said aerosol composition can comprise an actuator provided with a slit-shaped end orifice providing a flat spray.

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

As already mentioned above, the container includes both the propellant(s) and the other ingredients of the composition, in a single compartment, or as an alternative form in two compartments. According to the latter alternative form, the container can be formed of an outer aerosol reservoir comprising an inner bag hermetically welded to a valve. The various ingredients of the composition are introduced into the inner bag and a propellant is introduced between the bag and the container at a pressure sufficient to cause the composition to exit in the form of a spray.

Process

The invention also relates to a process employing the composition described above. The process according to the invention comprises a stage of application of this composition to keratin fibres.

The composition can be applied to the wet or dry head of hair, preferentially wet head of hair.

According to a specific embodiment of the process of the invention, the fibres are washed before application of the composition described above. According to a specific embodiment, the composition can in particular be applied at the roots.

The bath ratio of the composition applied to the hair (ratio by weight of the amount of composition applied to the amount of hair) can be between 0.05 and 10 and more particularly between 0.05 and 5.

The hair is optionally rinsed and/or wrung out in order to remove an excess of composition.

Another subject-matter of the invention is a process for shaping keratin fibres, in particular the hair, comprising a stage of application, to the keratin fibres, of a composition sprayed over the fibres using an aerosol device comprising at least one silicone acrylic copolymer and at least from 30% to 75% by weight of at least one propellant, and a stage of shaping said fibres.

Another subject-matter of the invention is a process for the treatment of keratin fibres, in particular the hair, comprising the following stages: i. application, to the keratin fibres, of a composition sprayed over the fibres using an aerosol device comprising at least one silicone acrylic copolymer and at least from 30% to 75% by weight of at least one propellant, and ii. application of heat to the keratin fibres using a heating tool, it being possible for the application of the heat to take place during or after the application of the composition, preferably after.

This process comprises a stage of application of heat (or heating stage).

Heating stage

The stage of application of heat can take place during or after the stage of application of the composition. Preferably, the stage of application of heat takes place after the application of the composition. An optional leave-on time can occur between the application of the composition and the application of heat.

According to one embodiment, a rinsing stage can take place after the stage of application of the composition. According to a preferred embodiment, the stage of application of the composition is not followed by a rinsing stage.

The stage of application of heat can be carried out by means of any heating device.

One or more heating tools can be applied uniquely or successively to the hair.

The application of heat can be carried out for a period of time of between 2 seconds and 1 hour and preferentially between 2 seconds and 1 minute. The application of the heating means can take place by successive touches or by sliding the appliance along the fibres.

The heating tool can be a straightening iron, a curling iron, a crimping iron, a waving iron, a hood, a hairdryer, an infrared heating system or a heating curler.

Preferably, the heating tool is a straightening iron or a hairdryer. Preferably, the process according to the invention employs a stage of application of heat by means of a straightening iron.

During the stage of application of heat to the keratin fibres, a mechanical action can be exerted on the locks, such as combing, brushing or running the fingers through.

The application of heat can be carried out at a temperature between 30°C and 230°C, preferentially between 80°C and 230°C and more preferentially between 100°C and 230°C, much better from 140°C to 230°C.

When the stage of application of heat to the keratin fibres is carried out with a hood or a hairdryer, the temperature is between 30°C and 110°C, preferably between 50°C and 90°C.

When the stage of application of heat to the keratin fibres is carried out with a straightening iron, the temperature is between 110°C and 230°C, preferably between 140°C and 230°C.

In a specific alternative form, the process of the invention employs a stage (b1) of application of heat using a hood or a hairdryer, preferably a hairdryer, and a stage (b2) of application of heat using a straightening or curling iron, preferably a straightening iron.

Preferably, stage (b1) is carried out before stage (b2).

During stage (b1), also referred to as the drying stage, the fibres can be dried, for example at a temperature of greater than or equal to 30°C. According to a specific embodiment, this temperature is greater than 40°C. According to a specific embodiment, this temperature is greater than 45°C and less than 110°C.

Preferably, if the fibres are dried, they are dried, in addition to a supply of heat, with a flow of air. This flow of air during drying makes it possible to improve the strand separation of the sheathing.

During drying, a mechanical action can be exerted on the locks, such as combing, brushing or running the fingers through.

During stage (b2), the passage of the straightening or curling iron, preferably the straightening iron, can be carried out at a temperature ranging from 110°C to 230°C, preferably between 140°C and 230°C. According to a preferred embodiment, the process employs a stage of application of heat by means of a hairdryer (drying) and a stage of application of heat by means of a straightening iron. Preferably, the process employs a stage of application of heat by means of a hairdryer (drying), followed by a stage of application of heat by means of a straightening iron.

Preferably, the process for the treatment of keratin fibres, whether or not it comprises a stage of application of heat, is a process of shaping keratin fibres, in particular for contributing volume to the head of hair.

Use Another subject-matter of the invention is the use of a composition sprayed from an aerosol device according to the present invention for the shaping of keratin fibres, in particular human keratin fibres, such as the hair.

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

Compositions A and B according to the invention 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.

[Table 1] (1) Granacrysil BMAS, sold by Grant Industries.

(2) Kraton G1701 MU SQR 1111, sold by Kraton Polymers.

Each of the compositions A and B is packaged in a separate aerosol device constituted by an aluminium can with a maximum filling volume of 100 ml and by a means making it possible to spray the composition.

The device making it possible to spray the composition is in particular constituted: By a valve: Gi 0.33/Ri 0.33/without PGA (ref: Precision P14427 and P13396)

By an actuator: DLSI639 from Lindal or APSL 0.33 m and APSL 0.41 mm Flow rate approximately 0.41 g/s Protocol for applications

- Shampooing

- Application of the composition according to the invention at the roots over wet straight fine hair (over approximately the first 5 cm)

- drying with a hairdryer or blow drying - Straightening iron (3 passes at the roots at about 210°C)

The aerosol device makes possible precise application at the roots.

After treatment, the heads of hair exhibit volume at the roots. The hairstyle is natural. This silicone sheathing is persistent with respect to shampooing operations. After 3 shampooing operations, the volume is retained.

Further, the composition according to the invention allows the shampooing operations to be spaced apart by limiting the regreasing of the treated hair