WO2011076490A2 - Hairstyling method using water-based hairstyling compounds - Google Patents

Abstract

The invention relates to a hairstyling method wherein at least one water-based hairstyling compound is applied to the hair, the hair is styled before, during or after the application and the styled hair is subsequently dried by using merely one gas stream, wherein the gas stream is generated by using a compressed gas container, comprising at least one propellant. The improved styling method results in an improved styling using water-based hairstyling compounds and can be carried out anywhere.

Description

 "Hair styling process using water-based hair styling compositions"

The present invention relates to a hairstyling process in which at least one water-based hairstyling composition is applied to the hair, the hair is applied to hairstyle before, during or after the application and then, with the application of only a gas stream, the hairstyle is dried, the gas stream by application a compressed gas container containing at least one propellant gas is generated. Furthermore, a packaging unit suitable for carrying out this method is the subject of the invention.

 Hair styling compositions, especially hair sprays or hair foams, usually have a large proportion of volatile organic compounds - called volatile organic compounds (VOC) for short. These include volatile organic solvents. The use of volatile organic solvents favors the solubility of the ingredients of the styling agent. Furthermore, the said solvents are used for the rapid drying of hair treated with a styling agent. A quick hair drying is desired. It accelerates the fixation of the hairstyle by hardening the fixing ingredients such as waxes or polymers. Likewise, the quick drying reduces the hanging of the hairstyle by increased weight of the wet hair.

 Increasingly, the amount of VOC in hair styling agents is reduced to protect the environment. Often this is done by increasing the water content. However, this measure entails that the drying time of the hair after styling undesirably increases. For this reason, when using water-based styling agents, the person skilled in the art attaches importance to a drying step using warm air, as provided, for example, by a hair dryer or a drying hood. However, the dependence on a hot air source means that water-based hair styling can not be done perfectly anywhere.

 It was therefore an object of the present invention to provide a hair styling method using water-based hair styling compositions that can be performed anywhere, includes an effective hair drying step and results in a perfect styling result.

A first subject of the invention is therefore a process for hair shaping, in which a water-based composition comprising at least one hair-firming agent is applied to the hair, the hair is applied to the hairstyle before, during or after the application, followed by styling the hair is dried by a gas stream, wherein the gas stream is generated by using a compressed gas container containing at least one propellant gas.

 A "water-based composition" within the meaning of the invention contains at least 30% by weight of water, in particular at least 60% by weight of water.

According to the invention, a "pressurized gas container" is a container which has a higher gas pressure in the interior than outside the container and from which a gas stream is taken off via a valve leaves. Compressed gas containers, with the aid of which a product (eg a water-based composition) is delivered by the internal gas pressure of the container via a valve, is called by definition as "aerosol dispensing container". As a "non-aerosol dispensing container" a container under normal pressure is defined in reverse to the aerosol definition, with the aid of which a product can be delivered by mechanical action by a pumping or squeezing system.

 The water-based composition can be configured, for example, as a cream, gel, lotion, water-in-oil emulsion, oil-in-water emulsion, hair spray or hair foam. The expert applies cream, gel, lotion, water-in-oil emulsion, oil-in-water emulsion, for example, by hand, a cloth or comb on the hair. However, according to the invention, the person skilled in the art can also use aerosol dispensing containers or non-aerosol dispensing containers for the production of hair sprays or hair foams for this purpose.

 The water-based composition is preferably applied according to the invention with the aid of an aerosol dispensing container with the aid of at least one propellant. One possibility for producing the aerosol dispensing container which can be used in the method according to the invention is the filling of a suitable pressure-resistant container with all constituents of the water-based composition, the container subsequently being closed with a valve and the desired amount of propellant being introduced by conventional techniques.

To provide the water-based composition in an aerosol dispensing container, at least one propellant is preferably selected from N ₂ O, N ₂ , CO ₂ , air, argon, dimethyl ether, alkanes of 3 to 5 carbon atoms, such as propane, n-butane, iso-butane, n Pentane and iso-pentane, and mixtures thereof. Preference is given to N ₂ O, N ₂ , C0 ₂ , air, argon and mixtures thereof.

 The aerosol dispensing container preferably contains the propellant in amounts of from 5 to 95% by weight, based on the sum of the amount of propellant and aqueous composition. Amounts of from 50 to 90% by weight, in particular from 60 to 90% by weight, are particularly preferred.

 The water-based composition necessarily includes at least one hair fixing agent. This is preferably selected from at least one compound of the group formed from setting polymers and waxes.

Firming polymers contribute to the maintenance and / or build-up of the hair volume and hair fullness of the overall hairstyle. These polymers are at the same time also film-forming polymers and therefore generally typical substances for shaping hair treatment agents such as hair fixatives, hair foams, hair waxes, hair sprays. The film formation can be quite selective and connect only a few fibers. As a test method for the firming effect of a polymer, the so-called curl retention test is often used. Film-forming polymers are polymers which leave a continuous film on the skin, the hair or the nails when drying. Such film formers can be used in a wide variety of cosmetic products, such as for example face masks, make-up, hair fixatives, hair sprays, hair gels, hair waxes, hair treatments, shampoos or nail varnishes. Particularly preferred are those polymers which have a sufficient solubility in water or water / alcohol mixtures. This makes it possible to produce appropriate solutions that can be applied or processed in a simple manner. Film-forming polymers furthermore include those polymers which, when used in 0.01 to 20% strength by weight aqueous or aqueous-alcoholic solution, are capable of depositing a transparent polymer film on the hair. The film-forming polymers may be anionic, amphoteric, nonionic, permanent cationic or temporarily cationically charged.

According to the invention, particularly preferred for this embodiment are those water-based compositions additionally containing at least one setting polymer selected from at least one polymer of the group that is formed

 nonionic polymers based on ethylenically unsaturated monomers, in particular of homopolymers of N-vinylpyrrolidone,

 nonionic copolymers of N-vinylpyrrolidone,

 Homopolymers and nonionic copolymers of N-vinylcaprolactam,

 Copolymers of (meth) acrylamide,

 Polyvinyl alcohol, polyvinyl acetate,

 Chitosan and derivatives of chitosan,

 cationic cellulose derivatives,

cationic copolymers of the 3- (C 1 -C ₆ ) -alkyl-1-vinyl-imidazolinium,

 Copolymers containing the structural unit of the formula (M-1)

in which R ² = -H or -CH ₃ , R ³ , R ⁴ and R ^{5 are} independently selected from (C 1 -C ₄ ) -alkyl, (C 1 -C ₄ ) -alkenyl or (C ₂ to C ₄ ) -hydroxyalkyl groups, p = 1, 2, 3 or 4, q is a natural number and X ^"is a physiologically acceptable organic or inorganic anion,

 anionic polymers which have carboxylate and / or sulfonate groups,

anionic polyurethanes. Nonionic polymers based on ethylenically unsaturated monomers which are suitable as an additional consolidating polymer are those nonionic polymers which comprise at least one of the following structural units

wherein

 R is a hydrogen atom or a methyl group,

R 'represents a hydrogen atom or a (C 1 -C ₄ ) -acyl group,

R "and R""independently represent a (Ci to C ₇ ) -alkyl group or a

 Hydrogen atom

R '"represents a linear or branched (C 1 to C ₄ ) -alkyl group or a (C ₂ to C ₄ ) -hydroxyalkyl group.

Preferred nonionic setting polymers are homopolymers or copolymers composed of at least one of the following monomers: vinylpyrrolidone, vinylcaprolactam, vinyl esters such as vinyl acetate, vinyl alcohol, acrylamide, methacrylamide, alkyl and dialkylacrylamide, alkyl and dialkylmethacrylamide, alkyl acrylate, alkyl methacrylate, wherein in each case the alkyl groups of these monomers are selected from (C ₁ to C ₃ ) -alkyl groups.

 For the water-based compositions used according to the invention, particularly suitable nonionic polymers based on ethylenically unsaturated monomers contain at least one of the following structural units

wherein R 'represents a hydrogen atom or a (Cr to C ₃₀ ) acyl group, in particular a hydrogen atom or an acetyl group. Particularly suitable are homopolymers of vinyl caprolactam or vinyl pyrrolidone (such as Luviskol ^® K 90 or Luviskol ^® K 85 from BASF SE), (copolymers of vinylpyrrolidone and vinyl acetate such as those sold under the trademark Luviskol ^® VA 37, Luviskol ^® VA 55, Luviskol ^® VA are marketed by the firm BASF SE 64 and Luviskol ^® VA 73), (terpolymers of vinylpyrrolidone, vinyl acetate and vinyl propionate, polyacrylamides such as Akypomine ^® P 191 (from the company CHEM-Y), polyvinyl alcohols, for example, under the trade designations Elvanol ^® be sold by Du Pont or Vinol ^® 523/540 by Air Products), terpolymers of vinylpyrrolidone, methacrylamide and vinylimidazole (such as Luviset.RTM ^® Clear from BASF SE).

In addition to the nonionic polymers based on ethylenically unsaturated monomers, nonionic cellulose derivatives are also suitable for use as fixing polymers which are preferably selected from methylcellulose and in particular from cellulose ethers such as hydroxypropylcellulose (eg hydroxypropylcellulose having a molecular weight of 30,000 to 50,000) g / mol, which is marketed for example under the trade name Nisso Sl ^® from Lehmann & Voss, Hamburg), hydroxyethyl cellulose, such as (for example under the trademark Culminal® ^® and Benecel ^® AQUALON) and Natrosol ^® grades (Hercules) sold become.

 Cationic polymers are to be understood as meaning polymers which have a group in the main and / or side chain which may be "temporary" or "permanent" cationic. According to the invention, "permanently cationic" refers to those polymers which have a cationic group, irrespective of the pH of the agent. These are usually polymers containing a quaternary nitrogen atom, for example in the form of an ammonium group. Preferred cationic groups are quaternary ammonium groups. In particular, those polymers in which the quaternary ammonium group is bonded via a C 1-4 hydrocarbon group to a polymer main chain constructed from acrylic acid, methacrylic acid or derivatives thereof have proven to be particularly suitable.

 A cationic setting polymer which is preferably suitable according to the invention is at least one cationic setting polymer which contains at least one structural element of the formula (M9) and additionally at least one structural element of the formula (M10)

worin

wherein

 R is a hydrogen atom or a methyl group,

R ', R "and R" independently of one another represent a (C 1 to C ₃₀ ) -alkyl group,

 X is an oxygen atom or a group NH,

 A is an ethane-1,2-diyl group or a propane-1,3-diyl group,

n is 1 or 3.

 To compensate for the positive polymer charge are all possible physiologically acceptable anions, such as chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate or p-toluenesulfonate, triflate.

Such compounds are for example as

Copolymers of dimethylaminoethyl methacrylate quaternized with diethyl sulfate, vinyl pyrrolidone with the INCI name Polyquaternium-1 1, under the names Gafquat ^® 440, Gafquat ^® 734, Gafquat ^® 755 (each ISP), and Luviquat PQ 1 1 PN (BASF SE),

Copolymers of N-vinylpyrrolidone, N-vinylcaprolactam, N- (3-dimethyl aminopropyl) methacrylamide, and 3- (methacryloylamino) propyl-lauryl-dimethylammonium chloride (INCI designation: Polyquaternium-69), which (for example, under the trade name Aqua Style ^® 300 28-32 wt .-% of active substance in ethanol-water mixture) is sold by the company ISP.

 Furthermore, according to the invention, the cationic fixing polymers are particularly preferably selected from cationic, quaternized cellulose derivatives.

 Furthermore, cationic, quaternized cellulose derivatives are preferably suitable as setting polymers.

Such cationic, quaternized celluloses prove to be particularly advantageous for the purposes of the invention, which carry more than one permanent cationic charge in a side chain. Among these cationic celluloses such cationic celluloses with the INCI name Polyquaternium-4 in turn, are particularly suitable, which are sold for example under the names of Celquat ^® H 100, Celquat L 200 ^® by the company National Starch.

As cationic polymers which can be used particularly preferably for the purposes of the invention, there continue to be those cationic fixing copolymers which contain at least one structural element of the formula M1 1)

' (M1 1 ) worin R für eine (C-ι bis C₄)-Alkylgruppe, insbesondere eine Methylgruppe, steht, und zusätzlich mindestens ein weiteres kationisches und/oder nichtionisches Strukturelement aufweisen.

'(M1 1) wherein R is a (C-ι to C ₄ ) alkyl group, in particular a methyl group, and additionally having at least one further cationic and / or nonionic structural element.

 To compensate for the positive polymer charge are all possible physiologically acceptable anions, such as chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate or p-toluenesulfonate, triflate.

In turn, it is preferred according to the invention if, as additional cationic setting polymer, at least one copolymer (c1) is present, which in addition to at least one structural element of the formula (M1 1) additionally comprises a structural element of the formula (M6)

wherein R is a (Ci to C ₄ ) alkyl group, in particular a methyl group.

 To compensate for the positive polymer charge of the copolymers (c1) are all possible physiologically acceptable anions, such as chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate or p-toluenesulfonate, triflate.

 Very particularly preferred cationic fixing polymers as copolymers (c1) contain 10 to 30 mol%, preferably 15 to 25 mol% and in particular 20 mol% of structural units of the formula (M1 1) and 70 to 90 mol%, preferably 75 to 85 mol .-% and in particular 80 mol .-% of structural units of the formula (M6).

 It is particularly preferred if the copolymers (c1) in addition to polymer units resulting from the incorporation of said structural units of the formula (M1 1) and (M6) in the copolymer, a maximum of 5 wt .-%, preferably at most 1 wt .-% , Contain polymer units due to the incorporation of other monomers. Preferably, the copolymers (c1) are composed exclusively of structural units of the formula (M1 1) with R "= methyl and (M6).

Is to compensate the positive charge of the polymer of formula (polyl) used a chloride ion, then these N-methylvinylimidazole / vinylpyrrolidone copolymers are referred to as Polyquaternium-16, according to INCI Nomenclature and are, for example, from BASF under the trade names Luviquat ^® Style , Luviquat.RTM ^® FC 370, Luviquat.RTM ^® FC 550, FC 905 and Luviquat.RTM ^® Luviquat.RTM ^® HM 552

If a methosulfate is used to compensate for the positive charge of the polymer of the formula (polyl), these N-methylvinylimidazole / vinylpyrrolidone copolymers will be used according to INCI. Nomenclature referred to as Polyquaternium-44 and are available for example from BASF under the trade name Luviquat ^® UltraCare.

 Particularly preferred agents according to the invention comprise a copolymer (c1), in particular of the formula (polyl), which has molecular weights within a certain range. Here, agents according to the invention are preferred in which the copolymer (c1) has a molecular weight of 50 to 400 kDa, preferably 100 to 300 kDa, more preferably 150 to 250 kDa and in particular 190 to 210 kDa.

 In addition to the copolymer (s) (c1) or at its site, the agents according to the invention may also contain copolymers (c2) which, starting from the copolymer (c1), have structural units of the formula (M7) as additional structural units

 Further water-based compositions which can be used according to the invention are thus characterized in that they comprise as cationic film-forming and / or cationic setting polymer at least one copolymer (c2) which has at least one structural unit of formula (M1 1-a) and at least one structural unit of formula (M6) and at least one structural unit according to formula (M7)

 In this case too, it is particularly preferred if the copolymers (c2) in addition to polymer units resulting from the incorporation of the structural units of the formula (M1 1-a), (M6) and (M7) into the copolymer, a maximum of 5 wt .-%, preferably at most 1 wt .-%, polymer units, which go back to the incorporation of other monomers. Preferably, the copolymers (c2) are composed exclusively of structural units of the formulas (M1 1-a), (M6) and (M7).

To compensate for the positive polymer charge of component (c2) are all possible physiologically acceptable anions, such as chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate or p-toluenesulfonate, triflate. Is to compensate the positive charge of the polymer of formula (Poly2), a methosulfate be used refer to those N-methylvinylimidazole / vinylpyrrolidone / vinylcaprolactam copolymers, according to INCI nomenclature as Polyquaternium-46 and are for example available under the trade names Luviquat ^® Hold by BASF ,

 Very particularly preferred copolymers (c2) contain 1 to 20 mol%, preferably 5 to 15 mol% and in particular 10 mol% of structural units of the formula (M1 1-a) and 30 to 50 mol%, preferably 35 to 45 mol .-% and in particular 40 mol .-% of structural units of the formula (M6) and 40 to 60 mol .-%, preferably 45 to 55 mol .-% and in particular 60 mol .-% of structural units of the formula (M7).

 In addition to the copolymer (s) (c1) and / or (c2) or at its point, the water-based compositions used according to the invention may also comprise as cationic setting polymer copolymers (c3) which as structural units contain structural units of the formulas ( M1 1-a) and (M6), as well as further structural units from the group of vinylimidazole units and further structural units from the group of the acrylamide and / or methacrylamide units.

 Further water-based compositions which can be used according to the invention are characterized in that they comprise as cationic setting polymer at least one copolymer (c3) which has at least one structural unit of formula (M1 1-a) and at least one structural unit of formula (M6) and at least one structural unit of formula (M10) and at least one structural unit according to formula (M12)

 Here too, it is particularly preferred if the copolymers (c3) in addition to polymer units resulting from the incorporation of said structural units of the formula (M1 1-a), (M6), (M8) and (M12) in the copolymer, a maximum of 5 wt .-%, preferably at most 1 wt .-%, contain polymer units, which go back to the incorporation of other monomers. Preferably, the copolymers (c3) are composed exclusively of structural units of the formula (M1 1-a), (M6), (M8) and (M12).

To compensate for the positive polymer charge of component (c3) are all possible physiologically acceptable anions, such as chloride, bromide, hydrogen sulfate, methyl sulfate, ethyl sulfate, tetrafluoroborate, phosphate, hydrogen phosphate, dihydrogen phosphate or p-toluenesulfonate, triflate. Is to compensate the positive charge of the polymer of formula (poly 3) a methosulfate be used refer to those N-methylvinylimidazole / vinylpyrrolidone / vinylimidazole / methacrylamide copolymers, according to INCI nomenclature as Polyquaternium-68 and are, for example, from BASF under the tradename Luviquat ^® Supreme available.

 Very particularly preferred copolymers (c3) contain 1 to 12 mol%, preferably 3 to 9 mol% and in particular 6 mol% of structural units of the formula (M1 1-a) and 45 to 65 mol%, preferably 50 to 60 mol .-% and in particular 55 mol .-% of structural units of the formula (M6) and 1 to 20 mol .-%, preferably 5 to 15 mol .-% and in particular 10 mol .-% of structural units of the formula (M8) and 20 to 40 mol .-%, preferably 25 to 35 mol .-% and in particular 29 mol .-% of structural units of the formula (M12).

 Water-based compositions which can be used according to the invention optionally contain a copolymer (c3) which has molecular weights within a certain range. Here, water-based compositions which can be used according to the invention are preferred in which the copolymer (c3) has a molecular weight of 100 to 500 kDa, preferably 150 to 400 kDa, more preferably 250 to 350 kDa and in particular 290 to 310 kDa.

 Among the cationic fixing polymers selected from the cationic polymers having at least one structural element of the above formula (M1 1-a), the following are preferred:

Vinylpyrrolidone / 1-vinyl-3-methyl-1 H-imidazolium chloride copolymers (such as for example that with the INCI name Polyquaternium-16 under the trade names Luviquat ^® Style, Luviquat ^® FC 370, Luviquat ^® FC 550, Luviquat ^® FC 905 and Luviquat ^® HM 552 (BASF SE)),

Vinylpyrrolidone / 1-vinyl-3-methyl-1 H-imidazolium copolymers (such as for example that with the INCI name Polyquaternium-44 under the trade names Luviquat Care ^® (BASF SE)),

Vinylpyrrolidone / vinyl caprolactam / 1-vinyl-3-methyl-1 H-imidazolium terpolymer (such as for example that with the INCI name Polyquaternium-46 under the trade names Luviquat ^® Care or Luviquat Hold ^® (BASF SE)),

Vinylpyrrolidone / methacrylamide / vinyl imidazole / 1-vinyl-3-methyl-1H-imidazolium-Co polymer (such as for example that with the INCI name Polyquaternium-68 ^® under the trade name Luviquat Supreme (BASF SE)),

and mixtures of these polymers.

Further cationic polymers which can preferably be used in the water-based compositions which can be used according to the invention are the so-called "temporary cationic" polymers. These polymers usually contain an amino group which, at certain pH values, is present as quaternary ammonium group and thus cationic. These polymers include, for example, chitosans. Chitosan and / or chitosan derivatives are very particularly preferably suitable film-forming and / or setting polymers in the context of the present invention.

 Chitosans are biopolymers and are counted among the group of hydrocolloids. Chemically, these are partially deacetylated chitins of different molecular weight.

For the production of chitosans is based on chitin, preferably the shell remains of crustaceans, which are available as cheap raw materials in large quantities. The chitin is usually first deproteinized by the addition of bases, demineralized by the addition of mineral acids and finally deacetylated by the addition of strong bases, wherein the molecular weights can be distributed over a broad spectrum. Preferably used are those having an average molecular weight of 800,000 to 1,200,000 daltons, a Brookfield viscosity (1% by weight in glycolic acid) below 5,000 mPas, a degree of deacetylation in the range of 80 to 88% and an ash content of have less than 0.3 wt .-%.

 In addition to the chitosans as typical cationic biopolymers, cationically derivatized chitosans (such as, for example, quaternization products) or alkoxylated chitosans are also suitable for the purposes of the invention.

 Water-based compositions which can be used according to the invention may be characterized in that they comprise as chitosan derivative (s) neutralization products of chitosan with at least one acid selected from lactic acid, pyrrolidonecarboxylic acid, nicotinic acid, hydroxyisobutyric acid, hydroxyisovaleric acid or mixtures of these neutralization products.

Suitable chitosan (derivatives) are, for example, under the trade names Hydagen ^® CMF (1 wt .-% active ingredient in aqueous solution with 0.4 wt .-% glycolic acid, molecular weight 500000 to 5000000 g / mol Cognis), Hydagen ^® HCMF (chitosan (80%) deacetylated), molecular weight 50,000 to 1,000,000 g / mol, Cognis), Kytamer ^® PC (80 wt .-% of active substance of chitosan pyrolidoncarboxylat (INCI name: chitosan PCA), Amerchol) and Chitolam ^® NB / commercially 101 freely available.

 The chitosan or its derivatives are preferably present in the water-based compositions usable in accordance with the invention in an amount of from 0.01% by weight to 20% by weight, particularly preferably from 0.01% by weight to 10.0% by weight. , very particularly preferably from 0, 1 wt .-% to 1 wt .-%, each based on the weight of the inventive composition.

Suitable temporary cationic polymers for the purposes of the invention likewise include those which have at least one structural unit of the formulas (M1-1) to (M1-8)

In this case, preference is again given to those copolymers which contain at least one structural unit of the formulas (M1-1) to (M1-8) and additionally at least one structural unit of the formula (M10),

1 or 3 means.

Again, the group of polymers applies

Vinylcaprolactam / vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer (for example, INCI name: Vinyl caprolactam / PVP / di-methylaminoethyl methacrylate copolymer (Gaffix ^® under the trade name VC 713 ISP)),

 Vinylpyrrolidone / vinylcaprolactam / dimethylaminopropyl methacrylamide copolymer

(for example, INCI name: VP / vinyl caprolactam / DMAPA acrylates copolymer under the trade name Aquaflex ^® SF-40 (ISP)),

Vinylcaprolactam / vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer (for example as a 35-39% solids in ethanol in the form of the commercial product Advantage LC E with the INCI name: vinyl caprolactam / VP / dimethylaminoethyl methacrylate copolymer, alcohol, lauryl pyrrolidone (ISP)), Vinylpyrrolidone / dimethylaminopropylmethacrylamide copolymer (for example INCI name: VP / DMAPA Acrylates Copolymer under the trade name Styleze CC-10 (ISP)),

as a preferred list for selecting at least one or more polymers thereof.

The water-based compositions which can be used according to the invention can also contain at least one amphoteric polymer as a setting polymer. The term amphoteric polymers includes both those polymers which contain in the molecule both free amino groups and free -COOH or S0 ₃ H groups and which are capable of forming internal salts, as well as zwitterionic polymers which in the molecule have quaternary ammonium groups and -COO ^' or -S0 ₃ ^' groups, and those polymers comprising -COOH or S0 ₃ H groups and quaternary ammonium groups.

An example of the present invention amphopolymer suitable is the acrylic resin commercially available as Amphomer ^®, which is a copolymer of tert-butylaminoethyl methacrylate, N- (1, 1, 3,3-tetramethylbutyl) -acrylamide and two or more monomers from the group of acrylic acid, Methacrylic acid and their simple alkyl esters.

 The amphoteric polymers are preferably present in the water-based compositions which can be used according to the invention in amounts of from 0.01% by weight to 20% by weight, particularly preferably from 0.05 to 10% by weight, based on the total composition. Quantities of 0.1 to 5% by weight are very particularly preferred.

 Furthermore, at least one anionic setting polymer can be used as setting polymers. When the water-based composition employable in the present invention contains an anionic setting polymer, it is preferably in the form of a spray, especially an aerosol spray.

 The anionic polymers are anionic polymers which have carboxylate and / or sulfonate groups. Examples of anionic monomers from which such polymers may consist are acrylic acid, methacrylic acid, crotonic acid, maleic anhydride and 2-acrylamido-2-methylpropanesulfonic acid. The acidic groups may be wholly or partly present as sodium, potassium, ammonium, mono- or triethanolammonium salt.

The anionic, hair-setting polymers are preferably present in the water-based compositions usable in accordance with the invention in an amount of from 0.1 to 20.0% by weight, more preferably from 0.2 to 15.0% by weight. %, very particularly preferably from 0.5 wt .-% to 10.0 wt .-%, each based on the weight of the composition according to the invention. It is preferred according to the invention if the anionic, hair-fixing polymer comprises at least one structural unit of the formula (S1) which is selected from at least one structural unit of the formulas (S1 -1) to (S1-3)

(S1-3)

(S1-3)

and in addition to at least one structural unit of the formulas (S1-1) to (S1-3) additionally contains at least one structural unit of the formula (S2), which is selected from at least one structural unit of the formulas (S2-1) to (S2-8)

wherein

R ^{2 is} a (C ₂ to d ₂ ) acyl group (especially acetyl or neodecanoyl).

Within the scope of a preferred embodiment, such water-based compositions which can be used according to the invention are preferred according to the invention as hair-fixing polymer containing at least one polymer containing at least one structural unit of the formula (S1-3) and at least one structural unit of the formula (S2-8)

wherein R ^{2 is} a (C ₂ to d ₂ ) acyl group (in particular acetyl and / or neodecanoyl).

Particularly preferred polymers of this type are selected from at least one polymer of the group formed

 - Copolymers of vinyl acetate and crotonic acid.

 - copolymers of vinyl propionate and crotonic acid,

 - Copolymers of vinyl neodecanoate, vinyl acetate and crotonic acid.

Such copolymers are, for example, from the company Clariant under the trade name Aristoflex A 60 (INCI name: VA / Crotonates copolymer) in an isopropanol-water mixture (60 wt .-% of active substance), from BASF under the trade name Luviset CA 66 (Vinyl acetate / crotonic acid copolymer 90:10, INCI name VA / Crotonates Copolymer) provided by National Starch under the trade names Resyn 28-2942 and Resyn 28-2930 (INCI name: VA / Crotonates / Vinyl Neodecanoate Copolymer ) provided.

Within the scope of a preferred embodiment, such agents according to the invention are preferred as containing at least one polymer as anionic hair-fixing polymer, which contain at least one structural unit of the formula (S1-1) and at least one structural unit of the formula (S2-5)

C = 0

 I

NH

 C = 0

 I

OH (S1 -5) '(S2-5)

In this case, it is again particularly preferred if the anionic hair-fixing polymer additionally contains at least one structural unit of the formula (S3) in addition to the above structural units of the formulas (S1-1) and (S2-5)

wherein

R ⁵ represents a hydrogen atom or a methyl group R ⁶ is a (C 1 -C ₄ ) -alkyl group (in particular a methyl group or an ethyl group).

Particularly preferred polymers of this type are selected from at least one polymer of the group which is formed from copolymers of acrylic acid and ethyl acrylate and N-tert-butylacrylamide. Such copolymers are, for example, from BASF under the trade name Ultrahold ^® strand (INCI name: Acrylates / t-butylacrylamide copolymer, white, pourable granules) or Ultrahold ^® 8 (INCI name: Acrylates / t-butylacrylamide copolymer, white, pourable Granules) provided.

In addition, the water-based composition which can be used according to the invention as an anionic setting polymer contains at least one polyurethane having at least one carboxyl group (such as, for example, a copolymer of isophthalic acid, adipic acid, 1,6-hexanediol, neopentyl glycol and isophorone diisocyanate as sold under the trade name Luviset PUR with INCI). Term Polyurethane-1 is sold by the company BASF SE).

 The setting anionic polymers are preferably present in an amount of from 0.1 to 15% by weight, in particular from 0.5 to 10% by weight, based in each case on the weight of the water-based composition ,

 The waxes which can be used according to the invention as the hair firming agent preferably have a melting point in a range from 40 ° C. to 90 ° C.

 The waxes are preferably selected from vegetable, animal and mineral waxes, preference being given to those waxes which have a melting point in the range from 50 ° C. to 85 ° C., in particular from 50 ° C. to 75 ° C.

 Particularly preferred waxes according to the invention are beeswax (Cera Alba), carnauba wax, candelilla wax, montan wax, microcrystalline waxes (microcrystalline paraffins) and cetyl palmitate.

The teaching according to the invention also comprises the combined use of several waxes. Thus, addition of small amounts of carnauba wax can be used to increase the melting and dripping point of another wax and reduce its stickiness. Furthermore, a number of wax mixtures, optionally in admixture with other additives, commercially available. Those under the designations "Spezialwachs 7686 OE" (a mixture of Cetylpalmitat, beeswax, microcrystalline wax and polyethylene with a melting range of 73-75 ° C, manufacturer: Kahl & Co), Polywax ^® GP 200 (a mixture of stearyl alcohol and polyethylene glycol stearate with a melting point of 47-51 ° C, manufactured by Croda), and "Weichceresin ^® FL 400" (a petrolatum / vaseline oil / wax mixture having a melting point of 50- 54 ° C; manufacturer: Parafluid mineral oil company) are examples of the present invention is preferably used mixtures. In a specific embodiment of the invention, in addition to the compounds usually defined as waxes, it is also possible to use so-called "liquid waxes", such as, for example, jojoba oil, with the proviso that the melting point of this "wax mixture" is not below 40.degree lies.

 The water-based compositions preferably contain waxes in amounts of from 10 to 60% by weight, based on the total agent. Amounts of 10 to 55 wt .-% are particularly preferred.

 In a further embodiment, the water-based compositions according to the invention may additionally contain at least one silicone, in particular at least one silicone oil.

 Silicone oils which are suitable according to the invention are in particular dialkyl and alkylaryl siloxanes, such as, for example, dimethylpolysiloxane and methylphenylpolysiloxane, and also their alkoxylated, quaternized or else anionic derivatives. Preference is given to cyclic and linear polydialkylsiloxanes, their alkoxylated and / or aminated derivatives, dihydroxypolydimethylsiloxanes and polyphenylalkylsiloxanes.

The term silicone oils is understood by the person skilled in the art as meaning several structures of silicon-organic compounds. Initially, this is understood to mean the dimethiconols.

Examples of such products include the following commercial products: Botanisil NU-150M (Botanigenics), Dow Coming 1-1254 Fluid, Dow Corning 2-9023 Fluid, Dow Corning 2-9026 Fluid, Ultrapure Dimethiconol (Ultra Chemical), Unisil SF- R (Universal Preserve), X-21-5619 (Shin- Etsu Chemical Co.), Abil OSW 5 (Degussa Care Specialties), ACC DL-9430 Emulsion (Taylor Chemical Company), AEC Dimethiconol & Sodium Dodecylbenzenesulfonate (A & E Connock (Perfumery & Cosmetics) Ltd.), BC Dimethiconol Emulsion 95 (Basildon Chemical Company, Ltd.), Cosmetic Fluid 1401, Cosmetic Fluid 1403, Cosmetic Fluid 1501, Cosmetic Fluid 1401 DC (all aforementioned Chemsil Silicones, Inc.), Dow Corning 1401 Fluid, Dow Corning 1403 Fluid, Dow Corning 1501 Fluid, Dow Corning 1784 HVF Emulsion, Dow Corning 9546 Silicone Elastomer Blend (all aforementioned Dow Corning Corporation), Dub Gel Sl 1400 (Stearinerie Dubois Fils), HVM 4852 Emulsion (Crompton Corporation), Jeesilc 6056 (Jeen Internationa l Corporation), Lubrasil, Lubrasil DS (both Guardian Laboratories), Nonychosine E, Nonychosine V (both exsymol), SanSurf Petrolatum-25, Satin Finish (both Collaborative Laboratories, Inc.), Silatex-D30 (Cosmetic Ingredient Resources), Silsoft 148, Silsoft E-50, Silsoft E-623 (all aforementioned Crompton Corporation), SM555, SM2725, SM2765, SM2785 (all aforementioned GE Silicones), Taylor T-Sil CD-1, Taylor TME-4050E (all Taylor Chemical Wacker-Belsil CM 1000, Wacker-Belsil CM 3092, Wacker-Belsil CM 5040, Wacker-Belsil DM 3096, Wacker-Belsil DM 31 12 VP, Wacker-Belsil DM 8005 VP, Wacker-Belsil DM 60081 VP (all Wacker-Chemie GmbH mentioned above).

Dimethicones form the second group of silicones which may be present according to the invention. These may be both linear and branched as well as cyclic or cyclic and branched.

Dimethicone copolyols form another group of silicones that are suitable. Corresponding dimethicone copolyols are commercially available and are sold, for example, by Dow Corning under the name Dow ^Corning® 5330 Fluid.

Of course, the teaching according to the invention also encompasses the fact that the dimethiconols, dimethicones and / or dimethicone copolymers can already be present as an emulsion. In this case, the corresponding emulsion of dimethiconols, dimethicones and / or dimethicone copolyols can be prepared both after the preparation of the corresponding dimethiconols, dimethicones and / or dimethicone copolyols from these and the conventional methods of emulsification known to the person skilled in the art. For this purpose, both cationic, anionic, nonionic or zwitterionic surfactants and emulsifiers can be used as auxiliaries for the preparation of the corresponding emulsions. Of course, the emulsions of dimethiconols, dimethicones and / or dimethicone copolyols can also be prepared directly by an emulsion polymerization process. Such methods are also well known to the person skilled in the art.

 If the dimethiconols, dimethicones and / or dimethicone copolyols are used as emulsion, then the droplet size of the emulsified particles according to the invention 0.01 to 10,000 μιη, preferably 0.01 to 100 μιη, more preferably 0.01 to 20 μιη and most preferably 0 , 01 to 10 μιη. The particle size is determined by the method of light scattering.

If branched dimethiconols, dimethicones and / or dimethicone copolyols are used, it is to be understood that the branching is greater than a random branching, which occurs randomly due to impurities of the respective monomers. For the purposes of the present invention, branched dimethiconols, dimethicones and / or dimethicone copolyols are therefore to be understood as meaning that the degree of branching is greater than 0.01%. Preferably, a degree of branching is greater than 0.1%, and most preferably greater than 0.5%. The degree of branching is determined from the ratio of the unbranched monomers to the branching monomers, that is, the amount of tri- and tetrafunctional siloxanes. According to the invention, both low-branched and highly branched dimethiconols, dimethicones and / or dimethicone copolyols can be particularly preferred. Very particularly preferred suitable silicones are selected from cyclic silicones. Again, in particular, those of the formula (Si-1) are preferred,

in which x is a number from 4 to 10, preferably from 4 to 7 and in particular 4, 5 or 6. In particular, the agent according to the invention of this embodiment very particularly preferably contains octamethylcyclotetrasiloxane and / or decamethylcyclopentasiloxane.

 The cyclic dimethicones are referred to INCI as Cyclomethicone and are under the

Tradenames Xiameter PMX 0244 Cyclotetrasiloxanes, Xiameter PMX 0344 Cyclosiloxanes Blend,

Xiameter PMX 0245 Cyclopentasiloxane, Xiameter PMX 0345 Cyclosiloxane blend from the manufacturer

Xiameter.

The agents according to the invention preferably contain the silicones in amounts of from 0.01% by weight to 15% by weight, particularly preferably from 0.05 to 2% by weight, based on the total agent.

Suitable auxiliaries and additives for the aqueous composition are in particular:

 Thickeners such as agar-agar, guar gum, alginates, xanthan gum, gum arabic, karaya gum, locust bean gum, linseed gums, dextrans, cellulose derivatives, e.g. For example, methylcellulose, hydroxyalkylcellulose and carboxymethylcellulose, starch fractions and derivatives such as amylose, amylopectin and dextrins, clays such. Bentonite, fully synthetic hydrocolloids such as e.g. Polyvinyl alcohol, and optionally crosslinked polyacrylates,

 Structurants such as maleic acid and lactic acid,

 Perfume oils, dimethylisosorbide and cyclodextrins,

 Defoamers like silicones,

 Dyes for staining the agent,

 Anti-dandruff agents such as Piroctone Olamine, Zinc Omadine and Climbazole,

 Substances for adjusting the pH, such as conventional acids, in particular

Pleasure acids, and bases,

 Bodying agents such as sugar esters, polyol esters or polyol alkyl ethers,

 Complexing agents such as EDTA, NTA, β-alaninediacetic acid and phosphonic acids,

 Swelling and penetration substances such as glycerol, propylene glycol monoethyl ether, carbonates,

Hydrogencarbonates, guanidines, ureas and primary, secondary and tertiary phosphates, Opacifiers such as latex, styrene / PVP and styrene / acrylamide copolymers

 Pearlescing agents such as ethylene glycol mono- and distearate and PEG-3-distearate,

 Preservatives,

 Antioxidants.

 The pressurized gas container of the drying step of the process according to the invention contains at least one pressurized propellant gas. The internal pressure of the compressed gas container is preferably 1.5 to 15 bar, more preferably 4 to 12.5 bar.

The propellant gas is preferably selected from N ₂ O, N ₂ , C0 ₂ , air, argon and mixtures thereof. The propellant is discharged as a gas stream from the pressurized gas container of the drying step.

The compressed gas container of the drying step according to the invention preferably has a spray rate (measured in grams per 10 seconds) when exiting the container from 1 g / 10 seconds to 3 g / 10 seconds

 The compressed gas container of the drying step preferably has at a distance of 30 cm from the gas outlet a spray cone with a diameter of 4 cm to 12 cm, more preferably from 6 cm to 10 cm, most preferably from 7 to 9 cm on.

 The compressed gas container of the drying step preferably comprises a pressure-regulating valve which constantly down-regulates the internal pressure of the compressed gas container to an amount of 30% to 70% of the initial internal pressure. The initial internal pressure is the internal pressure of the pressurized gas container of the drying step prior to the first withdrawal of propellant gas.

 It is also conceivable according to the invention and also preferred to use the same gas as propellant or as drying gas stream for application of the water-based composition and for drying. Advantageously, in this case - as described later (vide infra) - combines the aerosol dispensing container and the compressed gas container in a bag-in-aerosol dispensing container, which can either only deliver a gas stream via a reversibly controllable mechanism or the aqueous composition as a spray or foam , It is also possible but cumbersome to design the aerosol dispensing container and the pressurized gas container in the form of an aerosol container with riser, which contains at least one propellant and at least one said water-based composition. If, in the relevant process step, the water-based composition is to be applied, the aerosol container with the valve device is applied upwards. In the drying step, however, the aerosol container is turned over and applied with the valve device down.

In a particularly preferred embodiment, the aerosol dispensing container of the water-based composition and the compressed gas container of the drying step are combined to form a packaging unit. A second object of the invention is a packaging unit comprising

 at least one aerosol dispensing container containing at least one propellant and a water-based composition comprising at least one hair setting agent and

 at least one further compressed gas container containing a pressurized propellant.

Included are at least one aerosol dispensing container and at least one pressurized gas container, each of which is offered as a single, independent container in an overpack, such as a carton or plastic wrapper, but is to be handled individually. Within the scope of a preferred embodiment of the aerosol dispensing container and the pressurized gas container, both are fastened to one another via a connecting element during application in the method according to the invention. As a connecting element, for example, is a shrink tube, which sheathed both containers. Likewise, it is possible, in turn, to combine both containers by means of a permanently wrapping outer packaging, such as a can or a hard plastic sleeve, to form a packaging unit.

 It is also conceivable according to the invention and also preferred to use the same gas as propellant or as drying gas stream for application of the water-based composition and for drying. In this case, for the application and the drying, for example, the use of a bag-in-can aerosol dispensing container, in a first chamber at least one propellant and in a in the first chamber inside, designed in the form of a flexible bag second chamber, a aqueous composition comprising at least one hair fixative, wherein the first chamber and the second chamber are fluidly connected to each other via a valve device, and by presetting a switching device of the output control mechanism from the valve device when actuated either the water based composition of the second Chamber (possibly together with propellant the first chamber) or only the propellant of the first chamber is applied.

This embodiment relates to a so-called bag-in-can aerosol dispensing container which, depending on the setting device of the output control mechanism, comprises the water-based composition for the application step of the process according to the invention as a spray or the gas stream necessary for the drying step of the process according to the invention (without the water-based composition ). Between these two functions of the bag-in-can aerosol dispensing container, it is possible to switch back and forth by actuating the switching mechanism of the regulating mechanism.

An example of such a bag-in-can aerosol dispensing container has a solid, box-shaped outer wall, preferably of metal or plastic, which encloses an internal pressure chamber (the aforesaid "first chamber") Pressure vessel closed by a valve cover or a valve device. Depending on requirements, additional sealants are used.

 Inside the pressure chamber (i.e., the first chamber) is disposed at least one flexible bag (i.e., second chamber) in which the water-based composition comprising at least one hair fixing agent is accommodated. In this case, the bag is in fluid communication with the valve device, which is suitable for dispensing said water-based composition from the aerosol dispensing container when the valve position is open. The bag is preferably made of a metal foil or a composite foil with metal and / or plastic components. Furthermore, the second chamber is in fluid communication with the dispensing control mechanism, which is preferably integrated in the valve device, but this may also be upstream or downstream.

 The pressure chamber (i.e., first chamber) is also in fluid communication with the valve device and the output control mechanism. The dispensing control mechanism allows the water-based composition from the second chamber (optionally together with first-chamber propellant) to be dispensed from the aerosol dispensing container upon actuation of the valve device upon actuation of a switching device. Further, the output control mechanism allows by actuation of a switching device that upon actuation of the valve device, the propellant can be discharged from the aerosol dispensing container alone in the form of a gas flow from the first chamber. In detail, the delivery of the water-based composition or the propellant from the aerosol dispensing container by appropriate actuation of the valve device, which is usually closed in the rest position and only when actuated, z. B. by pressure, opens.

 The delivery of the water-based composition is effected by appropriate pressurization of the pressure chamber (i.e., first chamber). For this purpose, the first chamber is filled before the first use of the water-based composition with a suitable blowing agent, so that adjusts a suitable filling pressure in the first chamber. This filling pressure of the pressure chamber before first use is between 1-10 bar, preferably between 2-5 bar. Due to the pressure build-up in the pressure chamber, the flexible bag of the second chamber is uniformly pressurized from the outside, so that upon opening of the valve device, a desired release of the water-based composition takes place. For this purpose, the user via a switching device of the output control mechanism, the aerosol dispensing container so that the aqueous composition is discharged from the second chamber via the valve device. It is also possible that propellant gas is discharged from the first chamber simultaneously with the delivery of the aqueous composition through the valve device.

If this bag-in-can aerosol can is used, the following sequence of steps of the method according to the invention results: Method for hair shaping, wherein a bag-in-can Aerosol dispensing container is used, comprising in a first chamber at least one propellant and in a in the first chamber inside, designed in the form of a flexible bag second chamber, a water-based composition containing at least one hair fixing agent, wherein the first chamber and the second Chamber are connected in fluid communication via a valve device, and by presetting a switching device of the Ausgaberegelmechanismusses from the valve device when actuated either the water-based composition from the second chamber (possibly together with propellant of the first chamber) or only the propellant of the first chamber is applied

 said water-based composition comprising at least one hair-setting agent applied to the hair from the bag-in-can aerosol dispensing container, the hair being applied to hair before, during or after application, and

 then drying the finished hair through a gas stream of propellant dispensed from said bag-in-can aerosol dispensing container.

In each case, in turn, the preferred embodiments of the features described in the first subject of the invention are preferably mutatis mutandis suitable.

B e i s p e e l e

Aerosol dispensing containers were provided, each containing one of the following water based compositions:

 Copolymer of vinylpyrrolidone and vinyl acetate (60:40) (48-52% active in water, INCI name: VP / VA copolymer) (BASF SE)

² vinylpyrrolidone vinyl acetate copolymer (30:70) (about 48-52% solids in i-propanol, INCI name: VP / VA copolymer, isopropyl alcohol) (BASF SE)

³ INCI name: Octylacrylamide / Acrylates / Butylaminoethyl Methacrylate Copolymer (National Starch)

 4 Copolymer of isophthalic acid, 1, 6-hexanediol, 2,2-dimethyl-1, 3-propanediol, 3-hydroxy-2- (hydroxymethyl) -2-methylpropionic acid and isophorone diisocyanate, neutralized with 2-amino-2-methylpropanol (molecular weight 8000 g / mol, active substance 28 to 32 wt .-% in an ethanol / water mixture, INCI name: Polyurethane-1) (BASF SE)

The water-based composition E1 was filled into an aerosol container meeting the following technical parameters: Aluminum storage container with valve Product 522983 PV10697 from Pecision (Deutsche Präzisions-Ventil GmbH).

 The aerosol container was filled with a propellant gas mixture of propane / butane (47% by weight of propane, 50% by weight of butane, 3% by weight of isobutane), resulting in a weight ratio of formulation to propellant gas of 92 to 8. An aerosol foam product was obtained.

The water-based composition E2 was filled into an aerosol container meeting the following technical parameters: Aluminum storage container with valve Product Coster KE 130 from Coster. The aerosol container was filled with dimethyl ether to give a formulation to propellant weight ratio of 60 to 40. An aerosol spray was obtained.

In addition, two compressed gas containers were provided with air as propellant and an internal pressure of 10 bar. The compressed gas container had a spray rate of 1, 5 g / 10 seconds and at a distance of 30 cm from the gas outlet a spray cone with a diameter of 8 cm.

One subject each styled himself using the water-based composition E1 or E2 as part of a self-application. The hairstyle obtained was in each case subsequently dried in the compressed air stream with the aid of the compressed gas container.

Claims

Patent claims A method of hair shaping in which a water-based composition comprising at least one hair fixing agent is applied to the hair, the hair is applied to the hair before, during or after the application, and then the hair is dried by a gas stream, wherein the gas stream is generated by use of a pressurized gas container containing at least one propellant gas.  2. The method according to claim 1, characterized in that the water-based composition with the aid of an aerosol dispensing container with the aid of at least one propellant is applied. 3. The method according to claim 2, characterized in that the propellant of the aerosol dispensing container is selected from N ₂ 0, N ₂ , C0 ₂ , air, argon and mixtures thereof.  4. The method according to any one of claims 1 to 3, characterized in that the internal pressure of the compressed gas container of the drying step 1, 5 to 15 bar, in particular 4 to 12.5 bar.  5. The method according to any one of claims 1 to 4, characterized in that the compressed gas container of the drying step has a spray rate (measured in grams per 10 seconds) at the outlet from the container of 1 g / 10 seconds to 3 g / 10 seconds. 6. The method according to any one of claims 1 to 5, characterized in that the compressed gas container of the drying step at a distance of 30 cm from the gas outlet a spray cone with a diameter of 4 cm to 12 cm, more preferably from 6 cm to 10 cm, especially preferably from 7 to 9 cm. 7. The method according to any one of claims 1 to 6, characterized in that the propellant gas of the compressed gas container is selected from N ₂ 0, N ₂ , C0 ₂ , air, argon and mixtures thereof. 8. The method according to any one of claims 1 to 7, characterized in that the aerosol dispensing container of the water-based composition and the compressed gas container of the drying step are combined to form a packaging unit and a bag-in-can aerosol dispensing container is used in a first chamber at least one propellant and a water-based composition comprising at least one active agent fixing the hair in a second chamber, which is arranged in the first chamber and is configured in the form of a flexible bag, wherein the first chamber and the second chamber are connected to one another in fluid communication via a valve device, and by presetting a switching device of the Ausgaberegelmechanismusseses from the valve device when actuated either the water-based composition the second chamber (optionally together with propellant of the first chamber) or only the propellant of the first chamber is applied, wherein  said water-based composition comprising at least one hair fixing agent applied to the hair from the bag-in-can aerosol dispensing container,  the hair is put on the hair before, during or after the application and  then drying the finished hair through a gas stream of propellant dispensed from said bag-in-can aerosol dispensing container.  9. Packaging unit comprising  at least one aerosol dispensing container containing at least one propellant and a water-based composition comprising at least one hair setting agent and  at least one further compressed gas container containing a pressurized propellant.  A bag-in-can aerosol dispensing container comprising at least one propellant in a first chamber and a second chamber internally formed in a flexible bag in the first chamber, a water-based composition containing at least one hair-setting agent the first chamber and the second chamber are fluidly connected to each other via a valve device and by presetting a switching device of the output control mechanism from the valve device when actuated either the water-based composition from the second chamber (optionally together with first chamber propellant) or only the propellant the first chamber is applied.