WO2019129700A1

WO2019129700A1 - Composition comprising microbeads of wax, a propellant and a fixing polymer

Info

Publication number: WO2019129700A1
Application number: PCT/EP2018/086554
Authority: WO
Inventors: Lionel Aubert; Maïté MARGUET
Original assignee: L'oreal
Priority date: 2017-12-27
Filing date: 2018-12-21
Publication date: 2019-07-04
Also published as: FR3075629B1; FR3075629A1

Abstract

The present invention relates to a composition comprising: - one or more fixing polymer(s); - one or more microbead(s) of at least one wax and/or of at least one thermoplastic polymer other than the fixing polymers, - optionally one or more propellant(s).

Description

COMPOSITION COMPRISING MICROBEADS OF WAX, A PROPELLANT AND A FIXING POLYMER

The present invention relates to a composition, especially a cosmetic composition, based on microbead(s) of wax and/or of thermoplastic polymer, and on a fixing polymer, and to the use thereof for the cosmetic treatment of the hair, especially for hair shaping and/or hairstyle hold.

The hair products for shaping and/or hairstyle hold that are the most widespread on the cosmetics market are spray compositions, such as lacquers and sprays. They are composed essentially of an alcoholic or aqueous solution and of one or more materials, generally polymeric resins, also referred to as fixing components, the function of which is to form joins between the individual hairs, in a blend with various cosmetic adjuvants.

These products make it possible to ensure the fixing and the shape retention of the hairstyle over time, but they tend to rigidly set the head of hair, giving the impression of wearing a helmet, referred to as helmet effect. This criterion is often negatively perceived by consumers.

Over the course of the day, if the user runs their hands through their hair, the fixing provided by the lacquer is reduced. To date, the polymers conventionally used do not make it possible to re-establish the shape of the hairstyle if it has been disrupted.

The volume of the hairstyle also has a tendency to greatly decrease during the day, particularly for fine hair.

There is therefore a need to provide fixing products which do not rigidly set the head of hair, and which make it possible to re-establish the shape of the hairstyle.

There is also a need to provide volume to fine hair while retaining a natural effect.

There is also a need to provide a composition which makes it possible to define curls while retaining a natural effect.

There is also a need to propose hairstyling products which make it possible to provide the hair with manageability and to control frizz.

The applicant has found, astonishingly and advantageously, that the combination of microbead(s) of at least one wax and/or of at least one thermoplastic polymer, and of a fixing polymer, made it possible to obtain a hairstyle with volume and texture, while retaining a natural appearance and having the possibility of reworking one’s hairstyle.

Therefore, a subject of the invention is a composition comprising:

- one or more fixing polymer(s);

- one or more microbead(s) of at least one wax and/or of at least one thermoplastic polymer other than the fixing polymers,

- optionally one or more propellant(s). This particular combination allows instant shaping and/or form retention of the hairstyle by texturization without setting it rigidly.

It also makes it possible to re-establish the shape of the hairstyle even after it has been intentionally or unintentionally modified. The hairstyle may also be remodeled during the day, without further application of product.

This combination also makes it possible to provide volume to the hairstyle, which lasts over time, at least for 4 hours. In addition, the more the hands are passed through the hair, or the more the hair is brushed, the more this provision of volume appears, by virtue especially of the release of charges on contact with the fingers or with a brush, for example.

Thus, a significant decrease in, or even disappearance of, the white effect perceived on the hair with products based on solid particles, generally due to the presence of residues, is also obtained.

In addition, it makes it possible to keep a clean feel for the hands and for the hair.

The cosmetic composition according to the invention can be applied both to wet hair and to dry hair, preferably to dry hair.

Another subject of the invention is, in particular, a composition comprising:

- one or more fixing polymer(s) chosen from anionic fixing polymers, amphoteric fixing polymers, and mixtures thereof;

- one or more microbead(s) of at least one wax, and

- one or more propellant(s).

The present invention also relates to a process for hair shaping and/or hairstyle hold, comprising a step of applying the composition, to dry or wet hair, to be rinsed off or not after an optional leave-on time or after optional drying.

Another subject of the invention is the use of the composition for hair shaping and/or hairstyle hold.

According to a particularly preferred embodiment, the composition comprises one or more amphoteric fixing polymer(s), preferably chosen from polymers comprising units derived a) from at least one monomer chosen from acrylamides and methacrylamides substituted on the nitrogen atom with an alkyl group, b) from at least one acidic comonomer containing one or more carboxylic groups, and c) from at least one comonomer comprising at least one basic nitrogen atom, and one or more microbead(s) of at least one wax, preferably chosen from microbeads of carnauba wax, and optionally one or more propellant(s).

Other subjects, characteristics, aspects and advantages of the invention will emerge even more clearly on reading the description and the example that follows. The composition according to the present invention comprises one or more fixing polymers.

The term "fixing polymer" is intended to mean any polymer that is capable of giving a shape to a head of hair or of maintaining a head of hair in a given shape.

The fixing polymer(s) used may be chosen from anionic, cationic, amphoteric and nonionic fixing polymers, and mixtures thereof.

Anionic fixing polymers that may be mentioned include polymers comprising groups derived from carboxylic, sulfonic or phosphoric acids, and having a number- average molecular mass of between 500 and 5 000 000.

The carboxylic groups are provided by unsaturated monocarboxylic or dicarboxylic acid monomers, such as those corresponding to formula (I).

in which

n is an integer from 0 to 10,

A denotes a methylene group, optionally connected to the carbon atom of the unsaturated group or to the adjacent methylene group, when n is greater than 1 , via a heteroatom, such as oxygen or sulfur,

Ri denotes a hydrogen atom or a phenyl or benzyl group,

R₂ denotes a hydrogen atom, an alkyl group comprising from 1 to 4 carbon atoms or a carboxyl group,

R3 denotes a hydrogen atom, an alkyl group comprising from 1 to 4 carbon atoms, a -CH2-COOH group, a phenyl group or a benzyl group.

In formula (I) above, the alkyl group containing from 1 to 4 carbon atoms may in particular denote methyl and ethyl groups.

The anionic fixing polymers bearing carboxylic or sulfonic groups that are preferred are:

A) copolymers of acrylic or methacrylic acid or salts thereof, including copolymers of acrylic acid and acrylamide, and methacrylic acid/acrylic acid/ethyl acrylate/methyl methacrylate copolymers, in particular Amerhold DR 25 sold by the company Amerchol, and sodium salts of polyhydroxycarboxylic acids. Mention may also be made of methacrylic acid/ethyl acrylate copolymers, in particular in aqueous dispersion, such as Luviflex Soft and Luvimer MAE, which are sold by the company BASF.

B) copolymers of acrylic or methacrylic acids with a monoethylenic monomer such as ethylene, styrene, vinyl esters and acrylic or methacrylic acid esters, optionally grafted onto a polyalkylene glycol such as polyethylene glycol and optionally crosslinked. Such polymers are described in particular in French patent 1 222 944 and German application No. 2 330 956, the copolymers of this type comprising an optionally N-alkylated and/or hydroxyalkylated acrylamide unit in their chain as described especially in Luxembourg patent applications 75370 and 75371 . Mention may also be made of copolymers of acrylic acid and C1-C4 alkyl methacrylate.

As another anionic fixing polymer from this class, mention may also be made of the butyl acrylate/acrylic acid/methacrylic acid branched block anionic polymer sold under the name Fixate G-100 L by the company Lubrizol (INCI name AMP-Acrylates/Allyl Methacrylate Copolymer).

C) copolymers derived from crotonic acid, such as those of which the chain comprises vinyl acetate or propionate units and optionally other monomers such as allyl or methallyl esters, vinyl ether or vinyl ester of a saturated, linear or branched carboxylic acid containing a long hydrocarbon-based chain such as those comprising at least 5 carbon atoms, it being possible for these polymers to be optionally grafted and crosslinked, or alternatively a vinyl, allyl or methallyl ester of an a- or b-cyclic carboxylic acid. Such polymers are described, inter alia, in French patents Nos. 1 222 944, 1 580 545, 2 265 782, 2 265 781 , 1 564 1 10 and 2 439 798. Commercial products that fall within this category are the resins 282930, 261314 and 281310 sold by the company National Starch.

Mention may also be made, as copolymer derived from crotonic acid, of crotonic acid/vinyl acetate/vinyl tert-butylbenzoate terpolymers, and in particular Mexomer PW supplied by the company Chimex.

D) polymers derived from maleic, fumaric or itaconic acids or anhydrides with vinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives or acrylic acid and esters thereof; these polymers may be esterified. Such polymers are described in particular in US patents 2 047 398, 2 723 248 and 2 102 1 13 and GB patent 839 805, and especially those sold under the names Gantrez® AN or ES by the company ISP.

Polymers also falling within this category are the copolymers of maleic, citraconic or itaconic anhydrides and of an allylic or methallylic ester optionally comprising an acrylamide or methacrylamide group, an oolefin, acrylic or methacrylic esters, acrylic or methacrylic acids or vinylpyrrolidone in their chain, the anhydride functions being monoesterified or monoamidated. These polymers are described, for example, in French patents 2 350 384 and 2 357 241 by the Applicant.

E) polyacrylamides comprising carboxylate groups. F) polymers comprising sulfonic groups. These polymers may be polymers comprising vinylsulfonic, styrenesulfonic, naphthalenesulfonic, acrylamidoalkylsulfonic or sulfoisophthalate units.

These polymers may be chosen especially from:

- polyvinylsulfonic acid salts with a molecular mass of between 1000 and 100 000 approximately, and also the copolymers with an unsaturated comonomer such as acrylic or methacrylic acids and esters thereof, and also acrylamide or derivatives thereof, vinyl ethers and vinylpyrrolidone;

- polystyrenesulfonic acid salts and sodium salts, with a molecular mass of about 500 000 and of about 100 000. These compounds are described in patent FR 2198719;

- polyacrylamidesulfonic acid salts such as those mentioned in patent US 4 128

631 ;

G) grafted anionic silicone polymers.

The grafted silicone polymers used are preferentially chosen from polymers containing a non-silicone organic backbone grafted with monomers containing a polysiloxane, polymers containing a polysiloxane backbone grafted with non-silicone organic monomers, and mixtures thereof.

H) anionic polyurethanes, possibly comprising silicone grafts and silicones containing hydrocarbon-based grafts.

Examples of fixing polyurethanes that may especially be mentioned include the dimethylolpropionic acid/isophorone diisocyanate/neopentyl glycol/polyester diols copolymer (also known under the name polyurethane-1 , INCI name) sold under the brand name Luviset® PUR by the company BASF, and the dimethylolpropionic acid/isophorone diisocyanate/neopentyl glycol/polyester diols/silicone diamine copolymer (also known under the name polyurethane-6, INCI name) sold under the brand name Luviset® Si PUR A by the company BASF.

Another anionic polyurethane that may also be used is Avalure UR 450.

Polymers containing sulfoisophthalate groups, such as the polymers AQ55 and AQ48 sold by the company Eastman, may also be used.

According to the invention, the anionic fixing polymers are preferably chosen from acrylic acid copolymers, such as the acrylic acid/ethyl acrylate/N-tert-butylacrylamide terpolymer sold under the name Ultrahold Strong® by the company BASF, methacrylic acid/ethyl acrylate copolymers, in particular in aqueous dispersion, such as Luviflex Soft and Luvimer MAE sold by the company BASF, crotonic acid-derived copolymers, such as the vinyl acetate/vinyl tert-butylbenzoate/crotonic acid terpolymers and the crotonic acid/vinyl acetate/vinyl neododecanoate terpolymers sold under the name Resin 28-29- 30 by the company National Starch, polymers derived from maleic, fumaric or itaconic acids or anhydrides with vinyl esters, vinyl ethers, vinyl halides, phenylvinyl derivatives, acrylic acid and its esters, such as the monoesterified methyl vinyl ether/maleic anhydride copolymer sold under the name Gantrez® ES 425 by the company ISP, Luviset Si PUR, Mexomer PW, elastomeric or non-elastomeric anionic polyurethanes, polymers comprising sulfoisophthalate groups, and anionic fixing polymers of the B) class; and even more particularly use is preferably made of the acrylic acid/ethyl acrylate/N-tert-butylacrylamide terpolymer sold under the name Ultrahold Strong® by the company BASF.

The cationic fixing polymers that may be used according to the present invention are preferably chosen from polymers comprising primary, secondary, tertiary and/or quaternary amine groups forming part of the polymer chain or directly attached thereto, and having a molecular weight of between 500 and approximately 5 000 000 and preferably between 1000 and 3 000 000.

Among these cationic fixing polymers, mention may be made more particularly of the following cationic polymers:

- quaternized or non-quaternized vinylpyrrolidone/dialkylaminoalkyl acrylate or methacrylate copolymers, such as the products sold under the name Gafquat by the company ISP, for instance Gafquat 734 or Gafquat 755, or alternatively the products known as Copolymer 845, 958 and 937. These polymers are described in detail in French patents 2 077 143 and 2 393 573;

- dimethylaminoethyl methacrylate/vinylcaprolactam/vinylpyrrolidone terpolymers, such as the product sold under the name Gaffix VC 713 by the company ISP;

- quaternized vinylpyrrolidone/dimethylaminopropylmethacrylamide copolymers such as the product sold under the name Gafquat HS 100 by the company ISP;

- quaternary polymers of vinylpyrrolidone and of vinylimidazole, such as, for example, the products sold under the names Luviquat® FC 905, FC 550 and FC 370 by the company BASF;

- vinylamine polymers comprising in their structure:

(a) one or more units corresponding to formula (A) below:

(b) optionally one or more units corresponding to formula (B) below:

In other words, these polymers may especially be chosen from homopolymers or copolymers comprising one or more units derived from vinylamine and optionally one or more units derived from vinylformamide.

Preferably, these cationic polymers are chosen from polymers comprising, in their structure, from 5 mol% to 100 mol% of units corresponding to the formula (A) and from 0 to 95 mol% of units corresponding to the formula (B), preferentially from 10 mol% to 100 mol% of units corresponding to the formula (A) and from 0 to 90 mol% of units corresponding to the formula (B).

These polymers may be obtained, for example, by partial hydrolysis of polyvinylformamide. This hydrolysis may take place in acidic or basic medium.

The weight-average molecular weight of said polymer, measured by light scattering, may range from 1000 to 3 000 000 g/mol, preferably from 10 000 to 1 000 000 and more particularly from 100 000 to 500 000 g/mol.

The polymers comprising units of formula (A) and optionally units of formula (B) are especially sold under the Lupamin name by the company BASF, for instance, in a non-limiting way, the products provided under the names Lupamin 9095, Lupamin 5095, Lupamin 1095, Lupamin 9030 (or Luviquat 9030) and Lupamin 9010;

- polymers comprising a fatty chain and comprising a vinylpyrrolidone unit, such as the products sold under the names Styleze W20 and Styleze W10 by the company ISP;

- chitosans or salts thereof; the salts that may be used are in particular the acetate, lactate, glutamate, gluconate or pyrrolidonecarboxylate of chitosan.

Among these compounds, mention may be made of chitosan having a degree of deacetylation of 90.5% by weight, sold under the name Kytan Brut Standard by the company Aber Technologies, and chitosan pyrrolidonecarboxylate sold under the name Kytamer® PC by the company Amerchol.

The amphoteric fixing polymers that can be used in accordance with the invention may be chosen from polymers comprising units B and C distributed randomly in the polymer chain, in which B denotes a unit deriving from a monomer comprising at least one basic nitrogen atom and C denotes a unit deriving from an acid monomer comprising one or more carboxylic or sulfonic groups, or alternatively B and C may denote groups deriving from carboxybetaine or sulfobetaine zwitterionic monomers; B and C can also denote a cationic polymer chain comprising primary, secondary, tertiary or quaternary amine groups, in which at least one of the amine groups bears a carboxylic or sulfonic group connected via a hydrocarbon-based group, or alternatively B and C form part of a chain of a polymer containing an ethylenedicarboxylic unit in which one of the carboxylic groups has been made to react with a polyamine comprising one or more primary or secondary amine groups. The amphoteric fixing polymers corresponding to the definition given above that are more particularly preferred are chosen from the following polymers:

1 ) Polymers resulting from the copolymerization of a monomer derived from a vinyl compound bearing a carboxylic group, such as, more particularly, acrylic acid, methacrylic acid, maleic acid, ochloroacrylic acid, and a basic monomer derived from a substituted vinyl compound containing at least one basic atom, such as, more particularly, dialkylaminoalkyl methacrylate and acrylate, dialkylaminoalkyl methacrylamide and acrylamide. Such compounds are described in US patent 3 836 537.

The vinyl compound may also be a dialkyldiallylammonium salt such as diethyldiallylammonium chloride.

2) Polymers comprising units derived:

a) from at least one monomer chosen from acrylamides and methacrylamides substituted on the nitrogen with an alkyl group,

b) from at least one acidic comonomer containing one or more carboxylic groups, and

c) from at least one comonomer comprising at least one basic nitrogen atom such as acrylic and methacrylic acid esters bearing primary, secondary, tertiary and quaternary amine substituents, and the product of quaternization of dimethylaminoethyl methacrylate with dimethyl or diethyl sulfate.

The N-substituted acrylamides or methacrylamides that are more particularly preferred according to the invention are groups in which the alkyl groups contain from 2 to 12 carbon atoms and more particularly N-ethylacrylamide, N-tert-butylacrylamide, N- tert-octylacrylamide, N-octylacrylamide, N-decylacrylamide and N-dodecylacrylamide, and the corresponding methacrylamides.

The acidic comonomers are more particularly chosen from acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid and fumaric acid and alkyl monoesters, containing 1 to 4 carbon atoms, of maleic or fumaric acids or anhydrides. The preferred basic comonomers are aminoethyl, butylaminoethyl, N,N’-dimethylaminoethyl and N- tert-butylaminoethyl methacrylates. The copolymers of which the CTFA (4th edition, 1991 ) name is octylacrylamide/acrylates/butylaminoethyl methacrylate copolymer, such as the products sold under the name Amphomer® or Lovocryl® 47 by the company Akzo Nobel, are particularly used. The octylacrylamide/ acrylates/butylaminoethylmethacrylate copolymer may be 90% or 100% neutralized by AMP, preferably 100%.

3) Crosslinked and alkylated polyamino amides partially or totally deriving from polyamino amides of general formula (II):

in which R₄ represents a divalent group derived from a saturated dicarboxylic acid, from a mono- or dicarboxylic aliphatic acid with an ethylenic double bond, from an ester of an alcohol containing 1 to 6 carbon atoms with these acids, or from a group deriving from the addition of any one of said acids with a bis-primary amine or bis-secondary- derived amine, and Z denotes a group of a bis-primary or mono- or bis-secondary polyalkylene-polyamine, and preferably represents:

a) in proportions of from 60 mol% to 100 mol%, the group (III)

in which x = 2 and p = 2 or 3, or else x = 3 and p = 2,

this group deriving from diethylenetriamine, from triethylenetetramine or from dipropylenetriamine;

b) in proportions of 0 to 40 mol%, the group (IV) above, in which x = 2 and p = 1 , which derives from ethylenediamine, or the group deriving from piperazine;

c) in proportions of from 0 to 20 mol%, the group -NH-(CH2)6-NH- deriving from hexamethylenediamine, these polyaminoamines being crosslinked by addition of a difunctional crosslinking agent chosen from epihalohydrins, diepoxides, dianhydrides, bis-unsaturated derivatives, by means of 0.025 to 0.35 mol of crosslinking agent per amine group of the polyaminoamide, and being alkylated by the action of acrylic acid, chloroacetic acid or an alkane sultone or salts thereof.

The saturated carboxylic acids are preferably chosen from acids containing 6 to 10 carbon atoms, such as adipic acid, 2,2,4-trimethyladipic acid, 2,4,4-trimethyladipic acid and terephthalic acid, and acids bearing an ethylenic double bond, for instance acrylic, methacrylic and itaconic acids. The alkane sultones used in the alkylation are preferably propane sultone or butane sultone, the salts of the alkylating agents are preferably the sodium or potassium salts.

(4) Polymers comprising zwitterionic units of formula (V):

in which

R5 denotes a polymerizable unsaturated group such as an acrylate, methacrylate, acrylamide or methacrylamide group,

y and z each represent an integer from 1 to 3,

R6 and R7 represent a hydrogen atom or a methyl, ethyl or propyl group,

Re and Rg represent a hydrogen atom or an alkyl group such that the sum of the carbon atoms in R₁₀ and Rn does not exceed 10.

The polymers comprising such units may also comprise units derived from non- zwitterionic monomers such as dimethyl- or diethylaminoethyl acrylate or methacrylate or alkyl acrylates or methacrylates, acrylamides or methacrylamides or vinyl acetate.

5) Polymers derived from chitosan comprising monomer units corresponding to the following formulae (VI), (VII) and (VIII):

the unit (VI) being present in proportions of between 0 and 30%, the unit (VII) in proportions of between 5% and 50% and the unit (VIII) in proportions of between 30% and 90%, it being understood that, in this unit (VIII), R10 represents a group of formula (IX):

in which, if q = 0, Rn , R₁₂ and R₁₃, which may be identical or different, each represent a hydrogen atom, a methyl, hydroxyl, acetoxy or amino residue, a monoalkylamine residue or a dialkylamine residue that are optionally interrupted with one or more nitrogen atoms and/or optionally substituted with one or more amine, hydroxyl, carboxyl, alkylthio or sulfonic groups, an alkylthio residue in which the alkyl group bears an amino residue, at least one of the groups Rn , Ri2 and R1₃ being, in this case, a hydrogen atom;

or, if q = 1 , Rn , R12 and R1₃ each represent a hydrogen atom, and also the salts formed by these compounds with bases or acids.

6) Polymers derived from the N-carboxyalkylation of chitosan.

7) Polymers of units corresponding to the general formula (X) described, for example, in French patent 1 400 366:

in which RM represents a hydrogen atom or a CH₃O, CH₃CH2O, or phenyl group, R1₅ denotes hydrogen or a C1-C4 alkyl group such as methyl and ethyl, R1₆ denotes hydrogen or a C1-C4 alkyl group such as methyl and ethyl, R1₇ denotes a C1-C4 alkyl group such as methyl and ethyl or a group corresponding to the formula: -Ri8-N(Ri6)2, with R18 representing a -CH2-CH2-, -CH2-CH2-CH2-, or -CH2-CH(CH3)- group and R16 having the meanings given above,

and also the higher homologs of these groups, containing up to 6 carbon atoms.

8) Amphoteric polymers of the type -D-X-D-X-, chosen from:

a) polymers obtained by the action of chloroacetic acid or sodium chloroacetate on compounds comprising at least one unit of formula:

-D-X-D-X-D- (XI)

in which D denotes a group

and X denotes the symbol E or E’, where E or E’, which may be identical or different, denote a divalent group that is an alkylene group with a straight or branched chain containing up to 7 carbon atoms in the main chain, which is unsubstituted or substituted with hydroxyl groups and which can comprise, in addition to oxygen, nitrogen and sulfur atoms, 1 to 3 aromatic and/or heterocyclic rings; the oxygen, nitrogen and sulfur atoms being present in the form of ether, thioether, sulfoxide, sulfone, sulfonium, alkylamine or alkenylamine groups, hydroxyl, benzylamine, amine oxide, quaternary ammonium, amide, imide, alcohol, ester and/or urethane groups.

b) polymers of formula:

-D-X-D-X- (XII)

in which D denotes a group

and X denotes the symbol E or E’ and at least once E’; E having the meaning given above and E’ is a divalent group that is an alkylene group with a straight or branched chain containing up to 7 carbon atoms in the main chain, which is unsubstituted or substituted with one or more hydroxyl groups and which contains one or more nitrogen atoms, the nitrogen atom being substituted with an alkyl chain that is optionally interrupted with an oxygen atom and necessarily comprising one or more carboxyl functions or one or more hydroxyl functions, betainized by reaction with chloroacetic acid or sodium chloroacetate.

9) (Ci-C5)Alkyl vinyl ether/maleic anhydride copolymers partially modified by semiamidation with an N,N-dialkylaminoalkylamine such as N,N- dimethylaminopropylamine or by semiesterification with an N,N-dialkanolamine. These copolymers may also comprise other vinyl comonomers such as vinylcaprolactam.

According to one embodiment, the amphoteric fixing polymers that may be used in the invention may be chosen from branched block copolymers comprising:

(a) nonionic units derived from at least one monomer chosen from C1-C20 alkyl (meth)acrylates, N-mono-(C2-Ci2 alkyl)(meth)acrylamides and N,N-di(C2-Ci2 alkyl)(meth)acrylamides,

(b) anionic units derived from at least one monomer chosen from acrylic acid and methacrylic acid, and

(c) polyfunctional units derived from at least one monomer comprising at least two polymerizable unsaturated functional groups,

and preferably having a structure constituted of hydrophobic blocks onto which are fixed, via polyfunctional units (c), several blocks that are more hydrophilic.

The preferred amphoteric polymers are polymers comprising units derived:

a) from at least one monomer chosen from acrylamides and methacrylamides substituted on the nitrogen with an alkyl group, b) from at least one acidic comonomer containing one or more carboxylic groups, and

c) from at least one basic comonomer comprising at least one basic nitrogen atom such as acrylic and methacrylic acid esters bearing primary, secondary, tertiary and quaternary amine substituents, and the product of quaternization of dimethylaminoethyl methacrylate with dimethyl or diethyl sulfate.

Mention may be made in particular of the polymers sold under the name Amphomer® by the company Akzo Nobel.

The nonionic fixing polymers that may be used according to the present invention are chosen, for example, from:

- polyalkyloxazolines,

- vinyl acetate homopolymers,

- vinyl acetate copolymers, for instance copolymers of vinyl acetate and of acrylic ester, copolymers of vinyl acetate and of ethylene, or copolymers of vinyl acetate and of maleic ester, for example of dibutyl maleate,

- acrylic ester homopolymers and copolymers, for instance copolymers of alkyl acrylates and of alkyl methacrylates, such as the products sold by the company Rohm & Haas under the names Primal® AC-261 K and Eudragit® NE 30 D, by the company BASF under the name 8845, or by the company Hoechst under the name Appretan® N9212,

- copolymers of acrylonitrile and of a nonionic monomer chosen, for example, from butadiene and alkyl (meth)acrylates, such as the products provided under the name CJ 0601 B by the company Rohm & Haas,

- styrene homopolymers,

- styrene copolymers, for instance copolymers of styrene and of alkyl (meth)acrylate, such as the products Mowilith® LDM 691 1 , Mowilith® DM 61 1 and Mowilith® LDM 6070 sold by the company Hoechst, and the products Rhodopas® SD 215 and Rhodopas® DS 910 sold by the company Rhone-Poulenc; copolymers of styrene, of alkyl methacrylate and of alkyl acrylate; copolymers of styrene and of butadiene; or copolymers of styrene, of butadiene and of vinylpyridine,

- polyamides,

- vinyllactam homopolymers such as vinylpyrrolidone homopolymers and the polyvinylcaprolactam sold under the name Luviskol® Plus by the company BASF,

- vinyllactam copolymers such as a poly(vinylpyrrolidone/vinyllactam) copolymer sold under the trade name Luvitec® VPC 55K65W by the company BASF, poly(vinylpyrrolidone/vinyl acetate) copolymers, such as those sold under the name PVPVA® S630L by the company ISP, Luviskol® VA 73, VA 64, VA 55, VA 37 and VA 28 by the company BASF; and poly(vinylpyrrolidone/vinyl acetate/vinyl propionate) terpolymers, for instance the product sold under the name Luviskol® VAP 343 by the company BASF, and

- poly(vinyl alcohols).

The alkyl groups of the nonionic polymers mentioned above preferably contain from 1 to 6 carbon atoms.

Preferably, the fixing polymer(s) are chosen from anionic fixing polymers and amphoteric fixing polymers, and mixtures thereof. More preferentially, the fixing polymer(s) are chosen from amphoteric fixing polymers such as those described above, and more preferentially from polymers comprising units derived a) from at least one monomer chosen from acrylamides and methacrylamides substituted on the nitrogen atom with an alkyl group, b) from at least one acidic comonomer containing one or more carboxylic groups, and c) from at least one comonomer comprising at least one basic nitrogen atom.

According to the invention, the content of the fixing polymer(s) present in the composition is preferably between 0.01 % and 20% by weight, preferably between 0.1 % and 15% by weight, and more preferentially between 0.2% and 10% by weight, relative to the total weight of the composition.

According to a preferred embodiment, the content of amphoteric fixing polymer(s) and especially of the polymer(s) comprising units derived a) from at least one monomer chosen from acrylamides and methacrylamides substituted on the nitrogen atom with an alkyl group, b) from at least one acidic comonomer containing one or more carboxylic groups, and c) from at least one comonomer comprising at least one basic nitrogen atom that are present in the composition is between 0.01 % and 20% by weight, preferably between 0.1 % and 15% by weight, and more preferentially between 0.2% and 10% by weight, relative to the total weight of the composition.

The composition according to the invention also comprises one or more microbead(s) of at least one wax and/or of at least one thermoplastic polymer other than the fixing polymers.

“Microbeads” denotes particles having a volume-average size varying from 1 to 50 microns, in particular from 1 pm to 40 pm, and more particularly from 2 pm to 30 pm.

"Volume-average size" denotes the dimension given by statistical particle size distribution for half the population, referred to as Dv,50.

The size of the particles may be determined by laser diffraction granulometry, for example using an N5 or LS 230 or Mastersizer 2000 laser particle size analyzer. Generally speaking, the term“wax” means a lipophilic compound, which is solid at room temperature (25°C), with a reversible solid/liquid change of state, which has a melting point of greater than or equal to 60°C, which may be up to 160°C or even 200°C.

The particles of wax constituting one of the characteristics of the present invention are in a micronized form.

For the purposes of the present invention, “micronized wax” or“microwax” are intended to mean a wax in the form of a powder, the particles of which have a number- average size ranging from 0.5 to 50 pm, preferably ranging from 1 to 30 pm, or even ranging from 3 to 20 pm.

The microwaxes that may be used in the compositions according to the invention are chosen from waxes that are solid and rigid at room temperature (25°C), of animal, plant, mineral or synthetic origin, and mixtures thereof.

Preferably, the microwaxes according to the invention have a melting point ranging from 60°C to 160°C, in particular greater than or equal to 80°C, especially ranging from 80°C to 150°C, or even from 80°C to 100°C.

The melting point of the microwax may be measured using a differential scanning calorimeter (D.S.C.), for example the calorimeter sold under the name DSC 30 by the company Mettler. A sample of 15 mg of product placed in a crucible is subjected to a first temperature rise passing from 0°C to 160°C, at a heating rate of 10°C/minute, it is then cooled from 160°C to 0°C at a cooling rate of 10°C/minute and is finally subjected to a second temperature rise passing from 0°C to 160°C at a heating rate of 5°C/minute. During the second temperature increase, the variation of the difference in power absorbed by the empty crucible and by the crucible containing the sample of product is measured as a function of the temperature. The melting point of the compound is the temperature value corresponding to the top of the peak of the curve representing the variation in the difference in power absorbed as a function of the temperature.

It should be noted that care will be taken in the manufacturing process not to melt the microwax. Advantageously, the temperature of the composition during the manufacturing process does not exceed a temperature less than 30°C relative to the melting point of the microwax.

The micronized waxes used in the present application may be chosen from hydrocarbon-based, silicone-based and/or fluorinated micronized waxes, optionally comprising ester, amide, acid or hydroxyl functions.

They are especially of natural origin and may be chosen from optionally modified beeswax, carnauba wax, candelilla wax, paraffin waxes, microcrystalline waxes, montan wax, hydrogenated oils such as hydrogenated jojoba oil or hydrogenated castor oil or oil resulting from the polymerization of ethylene and/or propylene, waxes obtained by Fischer-Tropsch synthesis, esters and amides of fatty acids, silicone waxes such as alkyls, alkoxys and/or esters of poly(di)methylsiloxane that are solid at room temperature (25°C), having from 10 to 45 carbon atoms, fatty acids such as stearic or behenic acid, and mixtures thereof.

According to a preferred embodiment, the micronized waxes under consideration according to the invention have a number-average molecular mass of between 300 and 10 000 g/mol and preferably between 400 and 3000 g/mol.

As microwaxes that may be used in the compositions according to the invention, mention may be made especially of:

- carnauba microwaxes, such as the product sold under the name MicroCare 350^® by the company Micro Powders,

- synthetic microwaxes, such as the product sold under the name MicroEase 1 14S^® by the company Micro Powders,

- microwaxes constituted of a mixture of carnauba wax and polyethylene wax, such as the products sold under the names MicroCare 300^® and 310^® by the company Micro Powders,

- microwaxes constituted of a mixture of carnauba wax and polylactic acid, such as the product sold under the name Ecosoft 61 1^® by the company Micro Powders,

- microwaxes constituted of a mixture of carnauba wax and synthetic wax, such as the product sold under the name MicroCare 325^® by the company Micro Powders,

- polyethylene microwaxes such as the products sold under the names MicroPoly 200^®, 220^®, 220L^® and 250S^® by the company Micro Powders, and the products sold under the name Cerapure H5-C by the company Shamrock,

- microwaxes constituted of a mixture of polyethylene, synthetic mineral wax and polytetrafluoroethylene, such as the products sold under the names Micropoly 2001^® and Microsilk 418 by the company Micro Powders,

- polypropylene microwaxes, such as the product sold under the name Mattewax by the company Micro Powders,

- polylactic acid microwaxes such as the products sold under the names Ecosoft 608^® and Ecosoft 608XF^® by the company Micro Powders.

Carnauba microwaxes are most particularly suitable for use in the invention, and especially those sold by Micro Powders under the name MicroCare.

Preferably, a composition in accordance with the invention comprises at least one carnauba microwax, for example the product sold under the name MicroCare 350^® by the company Micro Powders. The microbeads may also be constituted of one or more thermoplastic polymers. The thermoplastic polymers may be chosen from homopolymers or copolymers which are especially block and/or random, such as polyacrylics, polymethacrylics, for instance polyacrylamides or polymethacrylic acids, polyolefins such as polypropylenes and polyethylenes, polystyrenes, poly(vinyl halides) such as PVC (polyvinyl chloride), poly(vinyl nitriles), polyurethanes, polyesters, polyvinyls, polyvinyl esters, polycarbonates, polysulfones, polysulfonamides, polycyclics having a ring in the main chain such as polyphenylenes, polymers having a heteroatom in the main chain such as polyamides or polyoxyphenylenes.

In the case of homopolymers, they may more particularly be chosen from homopolymers constituted of the following monomers:

Monomers, the homopolymers of which have glass transition temperatures of greater than or equal to 40°C are chosen, preferably, from the following monomers:

- methacrylates of formula CH2 = C(CH3) COOR1

in which R1 represents a linear or branched alkyl group containing 1 to 4 carbon atoms, such as a methyl, ethyl, propyl or isobutyl group, said alkyl group also optionally being able to be substituted with one or more substituents chosen from hydroxyl groups and halogen atoms (Cl, Br, I, F), or R1 represents a C4 to C12 cycloalkyl group,

- acrylates of formula CH2 = CH COOR2

in which R2 represents a C4 to C12 cycloalkyl group such as isobornyl acrylate or a tert- butyl group,

- (meth)acrylamides of formula:

R'

CH₂ = C

in which R7 and R8, which are identical or different, each represent a hydrogen atom or a linear or branched C1 to C12 alkyl group such as an n-butyl, t-butyl, isopropyl, isohexyl, isooctyl or isononyl group; or R7 represents H and R8 represents a 1 , 1 -dimethyl-3- oxobutyl group, and

R’ denotes H or methyl. Examples of monomers that may be mentioned include N- butylacrylamide, N-tert-butylacrylamide, N-isopropylacrylamide, N,N- dimethylacrylamide and N,N-dibutylacrylamide,

- styrene and derivatives thereof such as chlorostyrene,

- and mixtures thereof. Particularly preferred monomers are methyl methacrylate, isobutyl methacrylate, isobornyl (meth)acrylate, triufluoroethyl methacrylate, styrene, and mixtures thereof.

Preferably, the thermoplastic polymers are chosen from polyolefins such as polyethylenes and polypropylenes, polyamides, polyethers, polyurethanes or copolymers of these compounds.

According to the invention, the content of microbead(s) of at least one wax and/or of at least one thermoplastic polymer other than the fixing polymers, and in particular of microbeads of wax present in the composition is preferably between 0.1 % and 20% by weight, preferably between 0.2% and 15% by weight, and more preferentially between 0.5% and 10% by weight, relative to the total weight of the composition.

The composition according to the invention may especially comprise a content of microbeads of wax of between 0.1 % and 20% by weight, in particular between 0.2% and 15% by weight and more particularly between 0.5% and 10% by weight relative to the total weight of the composition.

According to a preferred embodiment of the invention, the weight ratio between the total content of fixing polymer(s) and the total content of microbead(s) of at least one wax and/or of at least one thermoplastic polymer is greater than or equal to 0.5; preferably, this ratio ranges from 0.5 to 6 and more preferentially from 0.5 to 5.

According to a particular embodiment, the weight ratio between the total content of amphoteric fixing polymer(s), and especially of the polymer(s) comprising units derived a) from at least one monomer chosen from acrylamides and methacrylamides substituted on the nitrogen atom with an alkyl group, b) from at least one acidic comonomer containing one or more carboxylic groups, and c) from at least one comonomer comprising at least one basic nitrogen atom, and the total content of microbead(s) of at least one wax, and especially of a carnauba wax, is greater than or equal to 0.5; preferably, this ratio ranges from 0.5 to 6 and more preferentially from 0.5 to 5.

The composition according to the present invention may comprise one or more organic solvents.

According to the invention, an organic solvent is liquid at room temperature (25°C) and atmospheric pressure (760 mmHg).

Preferably, the organic solvent(s) are chosen from linear or branched monoalcohols containing from 1 to 8 carbon atoms, polyols, polyethylene glycols, aromatic alcohols, and mixtures thereof.

More preferentially, the organic solvent(s) are chosen from ethanol, propanol, butanol, isopropanol, isobutanol, propylene glycol, dipropylene glycol, isoprene glycol, butylene glycol, glycerol, sorbitol, benzyl alcohol and phenoxyethanol, and mixtures thereof. Even more preferentially, the organic solvent(s) are chosen from ethanol, dipropylene glycol and benzyl alcohol, and mixtures thereof.

Preferably, the composition according to the invention comprises one or more organic solvents, more preferentially one or more organic solvents chosen from ethanol, dipropylene glycol, benzyl alcohol and mixtures thereof.

Preferably, when the organic solvent(s) are present in the composition according to the invention, the total content thereof ranges from 10% to 95% by weight, more preferentially from 20% to 90% by weight and even more preferentially from 30% to 85% by weight, relative to the total weight of the composition.

According to a particular embodiment of the invention, the composition according to the invention comprises water, preferably in a total content of between 1 % and 95% by weight, more preferentially between 2% and 90% by weight and even more preferentially between 10% and 85% by weight, relative to the total weight of the composition.

According to another embodiment, the composition according to the invention is anhydrous.

The term "anhydrous" means that the composition according to the invention comprises no water, or that the total water content is less than or equal to 0.1 % by weight relative to the total weight of the composition according to the invention.

Preferably, the composition comprises water and/or an organic solvent.

When the composition according to the invention is aqueous, the pH of the composition generally varies from 3 to 12, preferably from 4 to 1 1 , preferentially from 5 to 10 and better still from 6 to 9.

The pH of the composition may be adjusted to the desired value by means of basifying agents especially as described previously or of acidifying agents that are usually used. Among the acidifying agents, examples that may be mentioned include mineral or organic acids, for instance hydrochloric acid, orthophosphoric acid or sulfuric acid, carboxylic acids, for instance acetic acid, tartaric acid, citric acid and lactic acid, and sulfonic acids. The composition according to the present invention may comprise one or more propellants.

The propellant(s) that may be used according to the invention are preferably chosen from liquefied gases such as 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 especially such as C3- C5 alkanes, for instance propane, isopropane, n-butane, isobutane or pentane. According to a preferred embodiment of the invention, the propellant(s) are chosen from volatile, optionally halogenated hydrocarbons, for example n-butane, propane, isobutane, pentane and halogenated derivatives thereof; dimethyl ether; and mixtures thereof; more preferentially from dimethyl ether, C3-C5 alkanes, in particular propane, n-butane and isobutane, and mixtures thereof.

Preferably, when the propellant(s) is (are) present, the total content thereof is between 1 % and 90% by weight, more preferentially between 10% and 80% by weight, even more preferentially between 20% and 70% by weight, better still between 30% and 65% by weight, relative to the total weight of the composition.

The composition according to the present invention may optionally also comprise one or more organic alkaline agents.

Preferably, the organic alkaline agent(s) are chosen from organic amines with a pKb at 25°C of less than 12, more preferentially less than 10 and even more advantageously less than 6. It should be noted that this is the pKb corresponding to the function of highest basicity. In addition, the organic amines do not comprise any alkyl or alkenyl fatty chain comprising more than ten carbon atoms.

The organic alkaline agent(s) are preferably chosen from alkanolamines, in particular mono-, di- or tri- hydroxy(C1 -C6)alkylamines, such as 2-amino-2- methylpropanol, oxyethylenated and/or oxypropylenated ethylenediamines, amino acids, the polyamines of formula (XIII) below, and mixtures thereof:

R

N - W - N

\

^R‘ (XIII) in which formula (XIII) W is a divalent C1 to C6 alkylene radical optionally substituted with one or more hydroxyl groups or a C1 to C6 alkyl radical and/or optionally interrupted with one or more heteroatoms, such as O, or NRu, and Rx, Ry, Rz, Rt and Ru, which are identical or different, represent a hydrogen atom or a C1 to C6 alkyl, C1 to C6 hydroxyalkyl or C1 to C6 aminoalkyl radical.

Examples of amines of formula (XIII) that may be mentioned include 1 ,3- diaminopropane, 1 ,3-diamino-2-propanol, spermine and spermidine.

The term "alkanolamine" is intended to mean an organic amine comprising a primary, secondary or tertiary amine function, and one or more linear or branched C1 to C8 alkyl groups bearing one or more hydroxyl radicals. Organic amines chosen from alkanolamines such as monoalkanolamines, dialkanolamines or trialkanolamines comprising one to three identical or different C1 -C4 hydroxyalkyl radicals are in particular suitable for performing the invention.

Among the compounds of this type, mention may be made of monoethanolamine (MEA), diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, N,N-dimethylethanolamine, 2-amino-2-methyl-1 -propanol, triisopropanolamine, 2- amino-2-methyl-1 ,3-propanediol, 3-amino-1 ,2-propanediol, 3-dimethylamino-1 ,2- propanediol and tris(hydroxymethyl)aminomethane.

More particularly, the amino acids that may be used are of natural or synthetic origin, in their L, D or racemic form, and include at least one acid function chosen more particularly from carboxylic acid, sulfonic acid, phosphonic acid and phosphoric acid functions. The amino acids may be in neutral or ionic form.

As amino acids that may be used in the present invention, mention may especially be made of aspartic acid, glutamic acid, alanine, arginine, ornithine, citrulline, asparagine, carnitine, cysteine, glutamine, glycine, histidine, lysine, isoleucine, leucine, methionine, N-phenylalanine, proline, serine, taurine, threonine, tryptophan, tyrosine and valine.

Advantageously, the amino acids are basic amino acids comprising an additional amine function optionally included in a ring or in a ureido function.

Such basic amino acids are preferably chosen from those corresponding to formula (XIV) below, and also salts thereof:

R-CH2-CH(NH2)-C(0)-0H (XIV) in which formula (XIV) R represents a group chosen from imidazolyl, preferably imidazolyl-4-yl; aminopropyl; aminoethyl; -(CH2)2N(H)-C(0)-NH2; and -(CH2)2-N(H)- C(NH)-NH2.

The organic amine may also be chosen from organic amines of heterocyclic type. Besides histidine that has already been mentioned in the amino acids, mention may in particular be made of pyridine, piperidine, imidazole, triazole, tetrazole and benzimidazole.

The organic amine may also be chosen from amino acid dipeptides. As amino acid dipeptides that may be used in the present invention, mention may be made especially of carnosine, anserine and balenine.

The organic amine may also be chosen from compounds including a guanidine function. As amines of this type that may be used in the present invention, besides arginine, which has already been mentioned as an amino acid, mention may be made in particular of creatine, creatinine, 1 ,1 -dimethylguanidine, 1 , 1 -diethylguanidine, glycocyamine, metformin, agmatine, n-amidinoalanine, 3-guanidinopropionic acid, 4- guanidinobutyric acid and 2-([amino(imino)methyl]amino)ethane-1 -sulfonic acid.

Preferably, the alkaline agent(s) that are useful in the invention are chosen from aqueous ammonia, alkanolamines, amino acids in neutral or ionic form, in particular basic amino acids, and preferably corresponding to those of formula (VIII).

According to a preferred embodiment of the invention, the organic alkaline agent(s) are chosen from monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, N,N-dimethylethanolamine, 2-amino-2- methyl-1 -propanol, triisopropanolamine, 2-amino-2-methyl-1 ,3-propanediol, 3-amino- 1 ,2-propanediol, 3-dimethylamino-1 ,2-propanediol and tris(hydroxymethyl)aminomethane, and mixtures thereof; more preferentially, the organic alkaline agent is 2-amino-2-methyl-1 -propanol.

Preferably, when the organic alkaline agent(s) are present in the composition, the total content of the organic alkaline agent(s) is between 0.05% and 10% by weight, more preferentially between 0.1 % and 5% by weight, and even more preferentially between 0.2% and 6% by weight, relative to the total weight of the composition.

The composition according to the invention may optionally also comprise one or more additives, for instance anticaking agents, natural or synthetic thickeners or viscosity regulators other than the fixing polymers described previously; vitamins or provitamins; silicones; preserving agents; dyes; fragrances.

A person skilled in the art will take care to select the optional additives and the amount thereof such that they do not harm the properties of the composition of the present invention.

These additives may be present in the composition according to the invention in an amount ranging from 0 to 20% by weight, relative to the total weight of the composition.

Another subject of the present invention is the use of the composition as described previously, for hair shaping and/or hairstyle hold.

Another subject of the present invention is a process for hair shaping and/or hairstyle hold, comprising at least one step of applying, to dry or wet hair, a composition as described above, to be rinsed off or not after an optional leave-on time or after optional drying.

Preferably, the hair is not rinsed after the step(s) of applying the composition according to the invention. Preferably, the composition is applied to dry hair. The process of the invention may also comprise a step of heat treatment of the hair, preferably at a temperature ranging from 40°C to 250°C, preferably from 60°C to 250°C.

This heat treatment step is generally performed using a heating tool such as a straightening iron, a curling iron, a crimping iron, a waving iron, a steam iron, a hood, a hairdryer, an infrared heating system or a heating roller.

The process according to the invention may also comprise a step of shaping the hair.

According to one embodiment, the step of shaping the hair may be a blow-drying operation.

According to another embodiment, the step of shaping the hair may be a straightening/relaxing step or else a step for curling the hair.

This shaping step can be carried out by means of curlers, a curling iron or a straightening iron (also called flat tongs).

When the shaping step is carried out by means of an iron, it can be carried out at a temperature of at least 100°C.

Preferably, the iron is used at a temperature of at least 100°C, preferably at a temperature between, limits included, 100°C and 300°C, preferably between 120°C and 280°C, more preferably between 150°C and 250°C, and better still between 200 and 250°C.

Another subject of the present invention relates to an aerosol device comprising a composition as described previously.

Preferably, the aerosol device is intended for treating the hair, more preferentially intended for hair shaping and/or hairstyling.

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

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

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

The examples that follow serve to illustrate the invention without, however, being limiting in nature. EXAMPLE:

Example 1 :

The compositions according to the invention were prepared from the following ingredients, the contents of which are indicated in the tables below (as g of active material).

¹ : MicroCare 350^® sold by Micro Powders

2: Amphomer^® sold by Akzo Nobel These compositions A1 and A2 are applied to 3 volunteers at an amount of 2 to 3 g per half-head on short, dry hair. The compositions make it possible to provide fixing to the hair and a repositionable or remodelable effect. They also provide substance and body, and fine strand separation. It is also observed that, after passage of the fingers, the crispy coating is reduced in particular for composition A1 , and the result becomes more natural and the hair becomes more shiny than after the application.

These compositions A1 and A2 were also applied to 3 other volunteers at an amount of 2 to 3 g per half-head on short, dry hair. The compositions of the invention make it possible to achieve the same degree of styling, repositionable effect, form retention of the hairstyle, body and substance as a styling paste comprising a fixing polymer, applied in parallel to the other half-head. In addition, the application of compositions A1 and A2 provides better instant shaping with less impediment, and no residue. Additionally, compositions A1 and A2 do not stick to the fingers, unlike the paste. Finally, the compositions immediately give a lacquered effect to the head of hair which appears to be more fixed than with the paste. After passage of the fingers, this effect is softened and the visual appearance becomes natural, in particular for composition A1. These compositions A1 and A2 were also applied to 3 volunteers at an amount of 2 to 2.7 g per half-head on long, dry hair which had been curled using a curling iron beforehand. Compositions A1 and A2 make it possible to instantly achieve a“beachy wave” effect, that is to say natural, imperfect waves such as those obtained after bathing in the sea. After drying the products, good form retention of the hairstyle is obtained, and a styled/messy effect is still observed. After passage of the fingers, the hairstyle retains shape well, the hair has body, a styled effect and there is very little transfer of product to the hands. The curls are bouncy, and the sheen of the hair is increased after passage of the fingers, in particular for composition A1.

Example 2:

The compositions according to the invention A1 -A2 and comparatives compositions B1 -B3 were prepared from the following ingredients, the contents of which are indicated in the tables below (as g of active material).

¹: MicroCare 350^® sold by Micro Powders;

²:Amphomer^® sold by Akzo Nobel;

³:Ultrahold^® Strong sold by BASF;

⁴:Luviquat Excellence sold by BASF;

5:Luviskol VA 64 W sold by BASF.

Compositions A1 -A2 and B1 -B3 are packaged in 150ml_ aerosol devices equipped with a stirring metallic ball (diameter: 6mm) and with the same conventional spraying means (powder valve: NRK 250P RA 884/4/8 T200LPS; dispensing head: DSCO-425 Coster 060 D0124 V04.776 BC/BC, sold by Coster Company).

Before application, the locks are placed vertically. Compositions A1-A2 and B1-B3 are then sprayed from top to bottom on 2.7g natural dry locks (0.4 g of each composition per lock). After a drying time of 10 min at room temperature, the performances in terms of shine and clean feel is evaluated by 5 experts, on the dried hair, in a blind test.

The shine assessment is visual: each lock is slipped along between the index finger and the middle finger, from the root to tip, and the light's reflection on the hair’s curve is valued. Each expert has appressed each lock on a scale ranging from 0 (very bad) to 5 (very shiny).

The clean feel assessment (non-greasy/no crispy coating) is to evaluate the feel variation on a scale ranging from 0 (non- greasy, meaning very clean) to 5 (very greasy). Each lock is grabbed between the thumb and the index finger and the fingers are slipped from the top of the locks all the way down to the ends of the locks to assess the presence of a potential deposit.

The assessment of greasy/crispy coating is also evaluated by the observation or the feel of a product transfer to the fingers.

The results are summarised in following tables:

As illustrated, the experts found that the locks treated with compositions A1-A2 according to the invention were much shiny and had a significantly cleaner feel than those treated with comparatives compositions B1-B3.

Claims

1. - A composition comprising:

- one or more microbead(s) of at least one wax, and

- one or more propellant(s).

2. - The composition as claimed in the preceding claim, wherein the microbeads are present in the form of particles with a volume-average size varying from 1 to 50 pm, in particular from 1 to 40 pm, and more particularly from 2 pm to 30 pm.

3. - The composition as claimed in either one of the preceding claims, wherein the wax is chosen from waxes that are solid and rigid at room temperature, of animal, plant, mineral or synthetic origin, and mixtures thereof.

4. - The composition as claimed in any one of the preceding claims, wherein the wax has a number-average molar mass of between 300 and 10 000 g/mol, and preferably of between 400 and 3000 g/mol.

5. - The composition as claimed in any one of the preceding claims, wherein the wax is chosen from hydrocarbon-based, silicone-based and/or fluorinated micronized waxes, optionally comprising ester, amide, acid or hydroxyl functions.

6. - The composition as claimed in any one of the preceding claims, wherein the wax is chosen from optionally modified beeswax, carnauba wax, candelilla wax, paraffin waxes, microcrystalline waxes, montan wax, hydrogenated oils such as hydrogenated jojoba oil or hydrogenated castor oil or oil resulting from the polymerization of ethylene and/or propylene, waxes obtained by Fischer-Tropsch synthesis, esters and amides of fatty acids, silicone waxes such as alkyls, alkoxys and/or esters of poly(di)methylsiloxane that are solid at room temperature, having from 10 to 45 carbon atoms, fatty acids such as stearic or behenic acid, and mixtures thereof; preferably, the wax is carnauba wax.

7. - The composition as claimed in any one of the preceding claims, wherein the total content of the microbead(s) of at least one wax is between 0.1% and 20% by weight, preferably between 0.2% and 15% by weight, and more preferentially between 0.5% and 10% by weight, relative to the total weight of the composition.

8. - The composition as claimed in any one of the preceding claims, characterized in that the fixing polymer(s) are chosen from amphoteric fixing polymers.

9. - The composition as claimed in any one of the preceding claims, characterized in that the fixing polymer is chosen from copolymers containing acidic vinyl units and basic vinyl units, crosslinked and acylated polyamino amides, polymers containing zwitterionic units, chitosan-based polymers, modified (C1 -C5)alkyl vinyl ether/maleic anhydride copolymers, polymers comprising units derived a) from at least one monomer chosen from acrylamides or methacrylamides substituted on the nitrogen atom with an alkyl group, b) from at least one acidic comonomer containing one or more carboxylic groups, and c) from at least one comonomer comprising at least one basic nitrogen atom, and preferably from polymers comprising units derived a) from at least one monomer chosen from acrylamides or methacrylamides substituted on the nitrogen atom with an alkyl group, b) from at least one acidic comonomer containing one or more carboxylic groups, and c) from at least one comonomer comprising at least one basic nitrogen atom.

10. - The composition as claimed in any one of the preceding claims, characterized in that the total content of the fixing polymer(s) is between 0.1 % and 20% by weight, preferably between 0.5% and 15% by weight, and more preferentially between 1.0% and 10% by weight, relative to the total weight of the composition.

1 1 . - The composition as claimed in any one of the preceding claims, characterized in that the weight ratio between the total content of fixing polymer(s) and the total content of microbead(s) of at least one wax is greater than or equal to 0.5; preferably, this ratio ranges from 0.5 to 6 and more preferentially from 0.5 to 5.

12. - The composition as claimed in any one of the preceding claims, characterized in that it comprises water.

13. - The composition as claimed in any one of the preceding claims, characterized in that it comprises one or more organic solvent(s), preferably chosen from ethanol, propanol, butanol, isopropanol, isobutanol, propylene glycol, dipropylene glycol, isoprene glycol, butylene glycol, glycerol, sorbitol, benzyl alcohol, phenoxyethanol, and mixtures thereof; more preferentially from ethanol, dipropylene glycol, benzyl alcohol, and mixtures thereof; preferably, the total content of the organic solvent(s) is between 10% and 95% by weight, more preferentially between 20% and 90% by weight, even more preferentially between 30% and 85% by weight, relative to the total weight of the composition.

14. - The composition as claimed in any one of the preceding claims, characterized in that the propellant(s) are chosen from volatile, optionally halogenated hydrocarbons, for example n-butane, propane, isobutane, pentane and halogenated derivatives thereof; dimethyl ether; and mixtures thereof; more preferentially from dimethyl ether, C3-C5 alkanes, in particular propane, n-butane and isobutane, and mixtures thereof; preferably, the content of the propellant(s) is between 1% and 90% by weight, more preferentially between 10% and 80% by weight, even more preferentially between 20% and 70% by weight, better still between 30% and 65% by weight, relative to the total weight of the composition.

15. - A process for hair shaping and/or hairstyle hold, comprising a step of applying, to dry or wet hair, a composition as claimed in any one of claims 1 to 14, to be rinsed off or not after an optional leave-on time or after optional drying.

16. - Use of the composition as claimed in any one of claims 1 to 14 for hair shaping and/or hairstyle hold.

17. - Aerosol device comprising a container containing a composition as defined in any one of claims 1 to 14, and a means for spraying the composition.