WO2018225529A1

WO2018225529A1 - Composition for keratin fibers

Info

Publication number: WO2018225529A1
Application number: PCT/JP2018/020086
Authority: WO
Inventors: Harumi Mori; Takuya Hara; Amer Alkahwaji
Original assignee: L'oreal
Priority date: 2017-06-09
Filing date: 2018-05-18
Publication date: 2018-12-13
Also published as: JP2018203699A

Abstract

The present invention relates to a composition for use in coloring or bleaching keratin fibers, preferably hair, comprising (a) malonic acid and (b) at least one cationic polymer. The present invention can prevent or reduce the loss of volume of keratin fibers when the keratin fibers are colored by, for example, dyeing or bleaching, and when the colored keratin fibers are washed by, for example, shampooing.

Description

DESCRIPTION

COMPOSITION FOR KERATIN FIBERS

TECHNICAL FIELD

The present invention relates to a composition to be applied onto keratin fibers such typically used in dyeing or bleaching the keratin fibers, as well as the uses thereof.

BACKGROUND ART

It is known practice to add various conditioners to hair dye compositions in order to give the hair at least one of the following cosmetic properties-ease of disentangling, good feeling, smoothness, sheen, and volume.

However, there still exists a demand for a conditioning agent used in coloring or bleaching keratin fibers, which can prevent or reduce the loss of volume of keratin fibers when the keratin fibers are colored and/or when the colored keratin fibers are washed.

DISCLOSURE OF INVENTION

Especially, in some cases, the dyed or bleached keratin fibers tend to lose their volume because the roots of the dyed or bleached keratin fibers tend to bend, and it becomes difficult to lift up the keratin fibers. The loss of volume in dyed or bleached keratin fibers is not preferable because hair styling tends to be not easy.

Also, when the roots of the dyed or bleached keratin fibers bend, the side of the roots can be more visible. Thus, the difference in color between the dyed or bleached part of the keratin fibers and the newly grown undyed or unbleached part of the keratin fibers tends to be more distinct. This is not preferable either from the viewpoint of uniform appearance of dyed or bleached keratin fibers from the root to the tip of the keratin fibers. In addition, if undyed keratin fibers are white or gray hair, for example, the loss of volume of dyed keratin fibers may cause the appearance of looking old.

Furthermore, the loss of volume of dyed or bleached keratin fibers tends to be worse, when the dyed or bleached keratin fibers are washed by, for example, shampooing.

Thus, it is preferable to prevent or reduce the loss of volume of keratin fibers when the keratin fibers are colored by, for example, dyeing or bleaching and/or when the colored keratin fibers are washed by, for example, shampooing.

An objective of the present invention is to provide a composition for keratin fibers which can prevent or reduce the loss of volume of keratin fibers when the keratin fibers are colored and/or when the colored keratin fibers are washed.

The above objective can be achieved by a composition for use in coloring or bleaching keratin fibers, preferably hair, comprising:

(a) malonic acid; and

(b) at least one cationic polymer. The (b) cationic polymer may have a unit derived from vinylpyrrolidone.

The (b) cationic polymer may be selected from:

copolymers comprising vinylpyrrolidone units and dimethylaminoethyl methacrylate units,

copolymers comprising vinylpyrrolidone units,

ethacrylamidopropyltrimethylammonium units, and

copolymers comprising vinylpyrrolidone units and methylvinylimidazolium units.

The copolymers comprising vinylpyrrolidone units and dimethylaminoethyl methacrylate units may be chosen from:

vinylpyrrolidone/dimethylaminoethyl methacrylate copolymers;

vinylpyrrolidone/dimethylaminoethyl methacrylate copolymers quaternized with diethyl sulphate;

vinylpyrrolidone/dimethylaminoethyl methacrylate/hydrophilic polyurethane copolymers;

quaternized or non-quaternized vinylpyrrolidone/dimethylaminoethyl

methacrylate/C₈-Ci₆ olefin copolymers; and

vinylpyrrolidone/dimethylaminoethyl methacrylate/vinylcaprolactam copolymers.

The amount of the (a) malonic acid may range from 0.1% to 20% by weight, preferably from 0.5% to 15% by weight, and more preferably from 1% to 10% by weight, relative to the total weight of the composition.

The amount of the (b) cationic polymer may range from 0.5% to 30% by weight, preferably from 1%) to 20%) by weight, and more preferably from 1.5% to 15% by weight, relative to the total weight of the composition. The composition according to the present invention may further comprise propylene glycol.

The amount of the propylene glycol may range from 0.01 to 30% by weight, preferably from 0.1 to 25% by weight, and more preferably from 1 to 20% by weight relative to the total weight of the composition.

The composition according to the present invention may further comprise at least one oxidizing agent.

The oxidizing agent may be hydrogen peroxide.

The amount of the oxidizing agent may range from 0.01% to 30% by weight, preferably from 0.1%) to 20%) by weight, and more preferably from 1% to 10% by weight, relative to the total weight of the composition. The present invention also relates to a ready-to-use cosmetic composition for keratin fibers, preferably hair, comprising:

the composition according to the present invention,

a first composition comprising at least one oxidizing agent, and

a second composition comprising at least one alkaline agent. The present invention also relates to a kit for keratin fibers, preferably hair, comprising: a first compartment comprising the composition according to the present invention, further comprising at least one oxidizing agent, and

a second compartment comprising a second composition comprising at least one alkaline agent.

The present invention also relates to a kit for keratin fibers, preferably hair, comprising: a first compartment comprising a first composition comprising at least one oxidizing agent,

a second compartment comprising a second composition comprising at least one alkaline agent, and

a third compartment comprising the composition according to the present invention.

The present invention also relates to a cosmetic process for keratin fibers, preferably hair, comprising the steps of:

(1) mixing:

the composition according to the present invention,

a first composition comprising at least one oxidizing agent, and

a second composition comprising at least one alkaline agent to prepare a ready-to-use cosmetic composition, and

(2) applying the ready-to-use cosmetic composition to the keratin fibers.

BRIEF DESCRIPTION OF DRAWINGS Fig. 1 shows a side view in order to show how to determine the vertical angle between a plate and the tips of a hair fiber in the evaluation of volumizing effects of the compositions according to Examples 1-5 and Comparative Examples 1-10.

BEST MODE FOR CARRYING OUT THE INVENTION

After diligent research, the inventors have discovered that a combination of malonic acid and at least one cationic polymer can impart a volumizing effect and long lastingness to keratin fibers, when it is used in coloring or bleaching compositions for keratin fibers, thus completing the present invention.

Thus, the present invention relates to a composition for use in coloring or bleaching keratin fibers, preferably hair, comprising:

(a) malonic acid; and

(b) at least one cationic polymer.

The above composition according to the present invention can prevent or reduce the loss of volume of keratin fibers when the keratin fibers are colored by, for example, dyeing or bleaching, and/or when the colored keratin fibers are washed by, for example, shampooing. "Keratin fibers" here mean fibers which include at least one keratin substance. It is preferable that at least a part of the surface of the keratin fibers be formed by keratin substances. Examples of keratin fibers include hair, eyebrows, eyelashes, and the like. It is preferable that the present invention is used for hair. The above composition for keratin fibers according to the present invention can be used as a conditioning or a booster composition in coloring keratin fibers for the purpose of preventing or reducing the loss of volume of keratin fibers.

The composition according to the present invention can be used in combination with another composition including oxidizing agent(s). If the composition according to the present invention, which further comprises oxidizing agent(s), is used in combination with another composition including oxidation dye(s), it is possible to dye the keratin fibers. Alternatively, if the composition according to the present invention, which further comprises oxidizing agent(s), is used alone, it is possible to bleach the keratin fibers due to the action of the oxidizing agent.

It is preferable that the composition for keratin fibers according to the present invention be mixed with other compositions including each of at least one oxidizing agent and at least one alkaline agent, and the mixture thus obtained is used to color keratin fibers. In addition, if another composition including at least one alkaline agent includes oxidation base(s) and coupler(s), the keratin fibers can be dyed in a variety of colors.

The composition for use in coloring or bleaching keratin fibers according to the present invention can prevent or reduce the loss of volume of keratin fibers when the keratin fibers are colored by, for example, dyeing or bleaching, and/or when the colored keratin fibers are washed by, for example, shampooing.

Hereafter, the present invention will be described in a detailed manner. [Composition]

The composition for use in coloring or bleaching keratin fibers, preferably hair, according to the present invention comprises:

(a) malonic acid; and

(b) at least one cationic polymer.

(Malonic Acid)

The composition according to the present invention comprises (a) malonic acid.

Malonic acid can be represented by the general formula below:

The inventor surprisingly found that the combination of malonic acid and cationic polymer can provide a superior hair volumizing effect as well as long lasting performance in hair coloring and/or bleaching compared to other combinations using another dicarboxylic acid instead of malonic acid. The (a) malonic acid may be present in a content of 0.1% by weight or more, preferably 0.5% by weight or more, and more preferably 1% by weight or more, relative to the total weight of the composition. The (a) malonic acid may be present in a content of 20% by weight or less, preferably 15% by weight or less, and more preferably 10% by weight or less, relative to the total weight of the composition.

The (a) malonic acid may be present in a content ranging from 0.1% to 20% by weight, preferably from 0.5% to 15% by weight, and more preferably from 1% to 10% by weight, relative to the total weight of the composition.

(Cationic Polymer)

The composition according to the present invention comprises (b) at least one cationic polymer. Two or more (b) cationic polymers may be used in combination. Thus, a single type of cationic polymer or a combination of different types of cationic polymers may be used.

It should be noted that, for the purposes of the present invention, the term "cationic polymer" denotes any polymer containing cationic groups and/or groups that may be ionized into cationic groups.

Such polymers may be chosen from those already known per se as improving the cosmetic properties of the hair, i.e., especially those described in patent application EP-A-337 354 and in French patents FR-2 270 846, 2 383 660, 2 598 611, 2 470 596 and 2 519 863.

Among the (b) cationic polymers that may be mentioned more particularly are polymers of the polyamine, polyamino amide and polyquaternary ammonium type. Acationic polymer has a positive charge density. The charge density of the cationic polymer may be from 0.1 meq/g to 20 meq/g, preferably from 1 to 15 meq/g, and more preferably from 4 to 10 meq/g.

It may be preferable that the molecular weight of the cationic polymer be 1,000 or more, preferably 10,000 or more, more preferably 100,000 or more, and even more preferably 1,000,000 or more.

The cationic polymer may have at least one positively chargeable and/or positively charged moiety selected from the group consisting of a secondary or tertiary amino group, a quaternary ammonium group, a guanidine group, a biguanide group, an imidazole group, an imino group, a pyridyl group, and an amino group. The term (primary) "amino group" here means a of -NH₂ group.

The cationic polymer may be a homopolymer or a copolymer. The term "copolymer" is understood to mean both copolymers obtained from two kinds of monomers and those obtained from more than two kinds of monomers, such as terpolymers obtained from three kinds of monomers.

The cationic polymer may be selected from natural and synthetic cationic polymers. Non-limiting examples of the cationic polymers are as follows.

(1) Homopolymers and copolymers derived from acrylic or methacrylic esters and amides and comprising at least one unit chosen from units of the following formulas:

wherein:

Ri and R₂, which may be identical or different, are chosen from hydrogen and alkyl groups comprising from 1 to 6 carbon atoms, for instance, methyl and ethyl groups;

R₃, which may be identical or different, is chosen from hydrogen and CH₃;

the symbols A, which may be identical or different, are chosen from linear or branched alkyl groups comprising from 1 to 6 carbon atoms, for example, from 2 to 3 carbon atoms and hydroxyalkyl groups comprising from 1 to 4 carbon atoms;

R₄, R₅, and R₆, which may be identical or different, are chosen from alkyl groups comprising from 1 to 18 carbon atoms and benzyl groups, and in at least one embodiment, alkyl groups comprising from 1 to 6 carbon atoms; and

X is an anion derived from an inorganic or organic acid, such as methosulphate anions and halides, for instance chloride and bromide.

The copolymers of family (1) may also comprise at least one unit derived from comonomers which may be chosen from acrylamides, methacrylamides, diacetone acrylamides, acrylamides and methacrylamides substituted on the nitrogen atom with (C1-C4) lower alkyl groups, groups derived from acrylic or methacrylic acids and esters thereof, vinyllactams such as vinylpyrrolidone and vinylcaprolactam, and vinyl esters. Examples of copolymers of family (1) include, but are not limited to:

copolymers of acrylamide and of dimethylaminoethyl methacrylate quaternized with dimethyl sulphate or with a dimethyl halide,

copolymers of acrylamide and of methacryloyloxyethyltrimethylammonium chloride described, for example, in European Patent Application No. 0 080 976,

copolymers of acrylamide and of methacryloyloxyethyltrimethylammonium methosulphate, quatemized or nonquatemized vinylpyrrolidone/dialkylaminoalkyl acrylate or methacrylate copolymers, described, for example, in French Patent Nos. 2 077 143 and 2 393 573, dimethylaminoethyl methacrylate/vinylcaprolactam/vinylpyrrolidone terpolymers, vinylpyrrolidone/methacrylamidopropyldimethylamine copolymers, quatemized vinylpyrrolidone/dimethylaminopropylmethacrylamide copolymers, and

crosslinked methacryloyloxy(C₁-C₄)alkyltri(Ci-C4)alkylammonium salt polymers such as the polymers obtained by homopolymerization of dimethylaminoethyl methacrylate quatemized with methyl chloride, or by copolymerization of acrylamide with dimethylaminoethyl methacrylate quatemized with methyl chloride, the homopolymerization or copolymerization being followed by crosslinking with a compound containing olefinic unsaturation, for example, methylenebisacrylamide.

Preferably, copolymers of family (1) have a unit derived from vinylpyrrolidone. More preferably, copolymers of family (1) have at least one pendent ring structure derived from the vinylpyrrolidone. On the other hand, it is preferable that the copolymers of family (1) comprise no ring structure in the backbone of the polymer.

The copolymers of family (1) having vinylpyrrolidone units can be selected from:

(i) the copolymers comprising vinylpyrrolidone units and dimethylaminoethyl methacrylate units, for example:

- vinylpyrrolidone/dimethylaminoethyl methacrylate copolymers; for example, vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer (20/80 by weight) sold under the trade name Copolymer 845 by the company I.S.P.,

vinylpyrrolidone/dimethylaminoethyl methacrylate copolymers quatemized with diethyl sulphate; for example, vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer quatemized with diethyl sulphate, sold under the trade names Gafquat 734, 755, 755S and 755L by the company I.S.P.,

- vinylpyrrolidone/dimethylaminoethyl methacrylate/hydrophilic polyurethane copolymers; for example, vinylpyrrolidone/dimethylaminoethyl methacrylate/hydrophilic polyurethane copolymer, sold under the trade name Pecogel GC-310 by the company U.C.I.B., or under the trade names Aquamere CI 031 and C1511 by the company Blagden Chemicals,

- vinylpyrrolidone/dimethylaminoethyl methacrylate/C -Ci₆ olefin copolymers, quatemized or non-quatemized; for example, vinylpyrrolidone/dimethylaminoethyl methacrylate/C₈-Ci₆ olefin copolymer sold under the trade names Ganex ACP1050 to 1057, 1062-1069 and 1079-1086 by the company I.S.P.,

and

- vinylpyrrolidone/dimethylaminoethyl methacrylate/vinylcaprolactam copolymers; for example, vinylpyrrolidone/dimethylaminoethyl methacrylate/vinylcaprolactam copolymer sold under the trade name Gaffix VC713 by the company I.S.P;

(ii) the copolymers comprising vinylpyrrolidone units and methacrylamidopropyltrimethylammonium (MAPTAC) units, for example:

- vinylpyrrolidone/methacrylamidopropyltrimethylammonium copolymers; for example, vinylyrrolidone/MAPTAC copolymer sold under the trade names Gafquat ACP1011 and Gafquat HS100 by the company I.S.P,

and

- vinylpyrrolidone/methacrylamidopropyltrimethylammonium/vinylcaprolactam

terpolymers; for example, vinylpyrrolidone/MAPTAC/vinylcaprolactam terpolymer sold under the trade names Polymer ACP 1059, 1060 and 1156 by the company I.S.P.; and

(iii) the copolymers comprising vinylpyrrolidone units and methylvinylimidazolium units, for example: - vinylpyrrolidone/methylvinylimidazolium chloride copolymers; for example, vinylpyrrolidone/methylvinylimidazolium chloride copolymer sold under the trade names Luviquat FC370, FC550, FC905 and HM552 by the company BASF,

- vinylpyrrolidone/methylvinylimidazolium chloride/vinylimidazole copolymers; for example, vinylpyrrolidone/methylvinylimidazolium chloride/vinylimidazole copolymer sold under the trade name Luviquat 8155 by the company BASF,

and

- vinylpyrrolidone/methylvinylimidazolium methosulphate copolymers; for example, vinylpyrrolidone/methylvinylimidazolium methosulphate copolymer sold under the trade name Luviquat MS370 by the company BASF.

It may be preferable that the copolymers of family (1) be chosen from the copolymer comprising vinylpyrrolidone units and dimethylaminoethyl methacrylate units, more preferably chosen from vinylpyrrolidone/dimethylaminoethyl methacrylate copolymers quaternized with diethyl sulphate, and even more preferably Polyquaternium-11.

(2) Cationic cellulose derivatives such as cellulose ether derivatives comprising quaternary ammonium groups described, for example, in French Patent No. 1 492 597, such as the polymers sold under the names "JR" (JR 400, JR 125, and JR 30M) or "LR" (LR 400 and LR 30M) by the company Union Carbide Corporation. These polymers are also defined in the CTFA dictionary as quaternary ammoniums of hydroxyethylcellulose that have reacted with an epoxide substituted with a trimethylammonium group.

It may be preferable that the cationic cellulose derivatives be quaternized hydroxyethyl celluloses modified with at least one quaternary ammonium group comprising at least one fatty chain, such as alkyl, arylalkyl or alkylaryl groups comprising at least 8 carbon atoms, or mixtures thereof. The alkyl radicals borne by the quaternary ammonium group may preferably contain from 8 to 30 carbon atoms, especially from 10 to 30 carbon atoms. The aryl radicals preferably denote phenyl, benzyl, naphthyl or anthryl groups.

More preferably, the cationic cellulose derivatives may comprise at least one quaternary ammonium group including at least one Cs-C₃₀ hydrocarbon group.

Examples of quaternized alkylhydroxyethylcelluloses containing C₈-C₃₀ fatty chains that may be mentioned include the products Quatrisoft LM 200, Quatrisoft LM-X 529-18-A, Quatrisoft LM-X 529-18B (CI 2 alkyl) and Quatrisoft LM-X 529-8 (CI 8 alkyl) or Softcat Polymer SL100, Softcat SX-1300X, Softcat SX-1300H, Softcat SL-5, Softcat SL-30, Softcat SL-60 , Softcat SK-MH, Softcat SX-400X, Softcat SX-400H, SoftCat SK-L, Softcat SK-M, and Softcat SK-H, sold by the company Amerchol and the products Crodacel QM, Crodacel, QL (C 12 alkyl) and Crodacel QS (C 18 alkyl) sold by the company Croda.

Among these quaternized alkylhydroxyethylcelluloses the products corresponding to INCI name Polyquaternium-67 are preferred. From another view point, the cationic cellulose derivatives could also be chosen among cationic cellulose ether(s), comprising from 4 000 to 10 000 anhydroglucose units, said anhydroglucose units being substituted with at least:

(i) one substituent of formula [R4R₅R₆R₉N⁺](X₂-) in which

R4 and R₅ represent, independently of one another, a methyl or ethyl group,

R₆ represents a linear or branched C₈-C₂₄ alkyl group or an aralkyl group in which the linear or branched alkyl part is C₈-C₂₄,

R9 represents a divalent group which allows the attachment to the anhydroglucose group and which is chosen from -(B)_q-CH₂-CHOH-CH₂- and -CH₂CH₂-,

q denoting 0 or 1,

B denoting a divalent group -(CH₂CH₂0)_n'-s

n' being an integer ranging from 1 to 100,

X₂ ^" represents an anion; and

(ii) one substituent of formula

[R₁R₂R₃R₈N⁺](Xf) in which:

R¹, R² and R³ represent, independently of one another, a methyl or ethyl group,

R⁸ represents a divalent group which allows the attachment to the anhydroglucose group and which is chosen from -(A)_p-CH₂-CHOH-CH₂- and -CH₂CH₂-,

p denoting 0 or 1,

A denoting a divalent group -(CH₂CH₂0)_n-,

n being an integer ranging from 1 to 100, and

Xf represents an anion. Preferably, the substituent (i) of formula [R₄R₅R6R9N⁺](X₂ ^") is present at an average of from 0.0003 to 0.08 mol, per mole of anhydroglucose units.

The cationic cellulose ethers that can be used in the compositions according to the present invention are preferably hydroxyethyl celluloses or hydroxypropyl celluloses. The cationic cellulose ethers that can be used in the compositions according to the present invention preferably comprise more than 4500, advantageously more than 5000, and more preferably more than 6000 anhydroglucose units.

Preferably, the cationic cellulose ethers that can be used in the compositions according to the present invention preferably comprise up to 9000, and preferably up to 8000 anhydroglucose units.

These cationic cellulose ethers and the process for the preparation thereof are described in application WO 2005/000903.

According to a preferred variant, the cationic cellulose ethers that can be used in the compositions according to the present invention are formed from at least one unit (IV) and at least one of the following units (I), (II) and (III):

with the proviso that:

the total number of units (I)+(II)+(III)+(IV) is between 4000 and 10 000;

the [(III)+(IV)]/[(I)+(II)+(III)+(IV)] ratio ranges from 0.0003 to 0.8;

the [(II)+(IV)]/[(I)+(II)+(III)+(IV)] ratio ranges from 0.02 to 0.9;

the integers n and n', independently of one another, range from 0 to 5;

Ri, R₂, R₃, R₄ and R₅ represent, independently of one another, a methyl or ethyl group;

R₆ represents a linear or branched C₈-C₂₄, preferably Ci₀-C₂₄, more preferably Ci₂-C₂₄ and better still Ci₂-C₁₅, alkyl group or an aralkyl group in which the linear or branched alkyl part is C8-C24;

Xi^" and X₂ ^" represent anions preferably chosen, independently of one another, from phosphate, nitrate, sulphate and halide (CI^", Br^", F^", Γ) ions.

According to a particular variant, the cationic cellulose ethers that can be used in the compositions according to the present invention are formed from at least one unit (IV) and at least one of the units (I), (II) or (III) above, in which R₆ is a linear dodecyl group.

Among the cationic cellulose ethers that can be used in the compositions of the present invention, mention may be made of the polymers of Softcat SL-5, SL-30, SL-60 and SL-100 type (INCI: Polyquaternium-67) sold by the company Amerchol. The cationic cellulose ethers that are particularly preferred are the polymers of SL-60 and SL- 100 type.

(3) Cationic cellulose derivatives such as cellulose copolymers and cellulose derivatives grafted with a water-soluble monomer of quaternary ammonium, and described, for example, in U.S. Pat. No. 4,131,576, such as hydroxyalkylcelluloses, for instance, hydroxymethyl-, hydroxyethyl-, and hydroxypropylcelluloses grafted, for example, with a salt chosen from methacryloylethyltrimethylammonium, methacrylamidopropyltrimethylammonium, and dimethyldiallylammonium salts.

Commercial products corresponding to these polymers include, for example, the products sold under the name "Celquat® L 200" and "Celquat® H 100" by the company National Starch.

(4) Non-cellulose-based cationic polysaccharides described in U.S. Pat. Nos. 3,589,578 and 4,031,307, such as guar gums comprising cationic trialkylammonium groups, cationic hyaluronic acid, and dextran hydroxypropyl trimonium chloride. Guar gums modified with a salt, for example the chloride, of 2,3-epoxypropyltrimethylammonium (guar hydroxypropyltrimonium chloride) may also be used.

Such products are sold, for instance, under the trade names JAGUAR® C13 S, JAGUAR® C15, JAGUAR® C17, and JAGUAR® C162 by the company MEYHALL.

(5) Polymers comprising piperazinyl units and divalent alkylene or hydroxyalkylene groups comprising straight or branched chains, optionally interrupted with at least one entity chosen from oxygen, sulphur, nitrogen, aromatic rings, and heterocyclic rings, and also the oxidation and/or quaternization products of these polymers. Such polymers are described, for example, in French Patent Nos. 2 162 025 and 2 280 361.

(6) Water-soluble polyamino amides prepared, for example, by polycondensation of an acidic compound with a polyamine; these polyamino amides possibly being crosslinked with an entity chosen from epihalohydrins; diepoxides; dianhydrides; unsaturated dianhydrides; bisunsaturated derivatives; bishalohydrins; bisazetidiniums; bishaloacyidiamines; bisalkyl halides; oligomers resulting from the reaction of a difunctional compound which is reactive with an entity chosen from bishalohydrins, bisazetidiniums, bishaloacyldiamines, bisalkyl halides, epihalohydrins, diepoxides, and bisunsaturated derivatives; the crosslinking agent being used in an amount ranging from 0.025 to 0.35 mol per amine group of the polyamino amide; these polyamino amides optionally being alkylated or, if they comprise at least one tertiary amine function, they may be quaternized. Such polymers are described, for example, in French Patent Nos. 2 252 840 and 2 368 508.

(7) Polyamino amide derivatives resulting from the condensation of polyalkylene polyamines with polycarboxylic acids, followed by alkylation with difunctional agents, for example, adipic acid/dialkylaminohydroxyalkyldialkylenetriamine polymers in which the alkyl group comprises from 1 to 4 carbon atoms, such as methyl, ethyl, and propyl groups, and the alkylene group comprises from 1 to 4 carbon atoms, such as an ethylene group. Such polymers are described, for instance, in French Patent No. 1 583 363. In at least one embodiment, these derivatives may be chosen from adipic acid/dimethylaminohydroxypropyldiethylenetriamine polymers .

(8) Polymers obtained by reaction of a polyalkylene polyamine comprising two primary amine groups and at least one secondary amine group, with a dicarboxylic acid chosen from diglycolic acid and saturated aliphatic dicarboxylic acids comprising from 3 to 8 carbon atoms. The molar ratio of the polyalkylene polyamine to the dicarboxylic acid may range from 0.8:1 to 1.4: 1 ; the polyamino amide resulting therefrom being reacted with epichlorohydrin in a molar ratio of epichlorohydrin relative to the secondary amine group of the polyamino amide ranging from 0.5:1 to 1.8:1. Such polymers are described, for example, in U.S. Pat. Nos. 3,227,615 and 2,961,347.

(9) Cyclopolymers of alkyldiallylamine and cyclopolymers of dialkyldiallyl-ammonium, such as homopolymers and copolymers comprising, as the main constituent of the chain, at least one unit chosen from units of formulas (Va) and (Vb):

(C¾)/-— CRji C(R_J2)— C¾—

N

I

^R<* (Vb)

wherein:

k and t, which may be identical or different, are equal to 0 or 1, the sum k+t being equal to 1 ; Ri2 is chosen from hydrogen and methyl groups;

R₁₀ and Rn, which may be identical or different, are chosen from alkyl groups comprising from 1 to 6 carbon atoms, hydroxyalkyl groups in which the alkyl group comprises, for example, from 1 to 5 carbon atoms, and lower (Ci-C₄)amidoalkyl groups, or Rio and Rn may form, together with the nitrogen atom to which they are attached, heterocyclic groups such as piperidinyl and morpholinyl; and

Y' is an anion such as bromide, chloride, acetate, borate, citrate, tartrate, bisulphate, bisulphite, sulphate, and phosphate. These polymers are described, for example, in French Patent No. 2 080 759 and in its Certificate of Addition 2 190 406.

In one embodiment, Rio and Rn, which may be identical or different, are chosen from alkyl groups comprising from 1 to 4 carbon atoms. Examples of such polymers include, but are not limited to, (co)polydiallyldialkyl ammonium chloride such as the dimethyldiallylammonium chloride homopolymer (INCI: Polyquaternium-6) sold under the name "MERQUAT® 100" by the company CALGON (and its homologues of low weight-average molecular mass) and the copolymers of diallyldimethylammonium chloride and of acrylamide (INCI: Polyquaternium-7) sold under the name "MERQUAT® 550".

(10) Quaternary diammonium polymers comprising at least one repeating unit of formula (VI):

wherein:

Ri3, Ri4, Ri5, and R₁₆, which may be identical or different, are chosen from aliphatic, alicyclic, and arylaliphatic groups comprising from 1 to 20 carbon atoms and lower hydroxyalkyl aliphatic groups, or alternatively Ri₃, Ri₄, R₁₅, and Ri₆ may form, together or separately, with the nitrogen atoms to which they are attached, heterocycles optionally comprising a second heteroatom other than nitrogen, or alternatively Ri₃, Ri₄, Ris, and Ri₆, which may be identical or different, are chosen from linear or branched Ci-C₆ alkyl groups substituted with at least one group chosen from nitrile groups, ester groups, acyl groups, amide groups, -CO-O-Rn-E groups, and -CO-NH-R17-E groups, wherein Rn is an alkylene group and E is a quaternary ammonium group;

Ai and Bi, which may be identical or different, are chosen from polymethylene groups comprising from 2 to 20 carbon atoms, which may be linear or branched, saturated or unsaturated, and which may comprise, linked or intercalated in the main chain, at least one entity chosen from aromatic rings, oxygen, sulphur, sulphoxide groups, sulphone groups, disulphide groups, amino groups, alkylamino groups, hydroxyl groups, quaternary ammonium groups, ureido groups, amide groups, and ester groups, and

X^" is an anion derived from an inorganic or organic acid; Ai, Rn, and R₁₅ may form, together with the two nitrogen atoms to which they are attached, a piperazine ring;

if Ai is chosen from linear or branched, saturated or unsaturated alkylene or hydroxyalkylene groups, Bi may be chosen from: -(CH₂)_n-CO-E'-OC-(CH₂)n- wherein E' is chosen from:

a) glycol residues of formula -0-Z-0-, wherein Z is chosen from linear or branched hydrocarbon-based groups and groups of the following formulas:

-(CH₂-CH₂-0)x-CH₂-CH₂- -[CH₂-CH(CH₃)-0]_y-CH₂-CH(CH₃)- wherein x and y, which may be identical or different, are chosen from integers ranging from 1 to 4, which represent a defined and unique degree of polymerization, and numbers ranging from 1 to 4, which represent an average degree of polymerization;

b) bis-secondary diamine residue such as piperazine derivatives;

c) bis-primary diamine residues of formula -NH-Y-NH-, wherein Y is chosen from linear or branched hydrocarbon-based groups and the divalent group -CH₂-CH₂-S-S-CH₂-CH₂-_; and d) ureylene groups of formula -NH-CO-NH-.

In at least one embodiment, X^" is an anion such as chloride or bromide. Polymers of this type are described, for example, in French Patent Nos. 2 320 330; 2 270 846; 2 316 271; 2 336 434; and 2 413 907 and U.S. Pat. Nos. 2,273,780; 2,375,853; 2,388,614; 2,454,547; 3,206,462; 2,261,002; 2,271,378; 3,874,870; 4,001,432; 3,929,990; 3,966,904; 4,005,193; 4,025,617; 4,025,627; 4,025,653; 4,026,945; and 4,027,020. Non-limiting examples of such polymers include those comprising at least one repeating unit of formula (VII):

wherein Ri₃, Ri₄, Ris, and Ri₆, which may be identical or different, are chosen from alkyl and hydroxyalkyl groups comprising from 1 to 4 carbon atoms, n and p, which may be identical or different, are integers ranging from 2 to 20, and X^" is an anion derived from an inorganic or organic acid.

One particularly preferred compound of formula VII) is that for which R₁₀, Ri i Ri₂ and R₁₃ represent a methyl group, n=3, p=6 and X=C1, which is called Hexadimethrine chloride according to the INCI(CTFA) nomenclature.

(11) Polyquaternary ammonium polymers comprising units of formula (VIII):

R IS

— +-(C¾J,- H-CO— (C¾)₄-CO-NH— (C¾)_s-N+-A—

x- I I

19 X- ½

(VIII) wherein:

Ri8, Ri9, R20, and R₂i, which may be identical or different, are chosen from hydrogen, methyl groups, ethyl groups, propyl groups, β-hydroxyethyl groups, β-hydroxypropyl groups, -CH₂CH₂(OCH₂CH₂)_pOH groups, wherein p is chosen from integers ranging from 0 to 6, with the proviso that R₁₈, R19, R20, and R₂i are not simultaneously hydrogen,

r and s, which may be identical or different, are chosen from integers ranging from 1 to 6, q is chosen from integers ranging from 0 to 34,

X^" is an anion such as a halide, and

A is chosen from radicals of dihalides and -CH₂-CH₂-0-CH₂-CH₂-.

Such compounds are described, for instance, in European Patent Application No. 0 122 324.

(12) Quaternary polymers of vinylpyrrolidone and of vinylimidazole. Other examples of suitable cationic polymers include, but are not limited to, cationic proteins and cationic protein hydrolysates, polyalkyleneimines, such as polyethyleneimines, polymers comprising units chosen from vinylpyridine and vinylpyridinium units, condensates of polyamines and of epichlorohydrin, quaternary polyureylenes, and chitin derivatives.

According to one embodiment of the present invention, the at least one cationic polymer is chosen from cellulose ether derivatives comprising quaternary ammonium groups, such as the product sold under the name "JR 400" by the company UNION CARBIDE CORPORATION, cationic cyclopolymers, for instance, the homo-polymers and copolymers of dimethyldiallylammonium chloride sold under the names MERQUAT® 100, MERQUAT® 550, and MERQUAT® S by the company CALGON, guar gums modified with a 2,3-epoxypropyltrimethylammonium salt, and quaternary polymers of vinylpyrrolidone and of vinylimidazole. (13) Polyamines

As the cationic polymer, it is also possible to use (co)polyamines, which may be homopolymers or copolymers, with a plurality of amino groups. The amino group may be a primary, secondary, tertiary or quaternary amino group. The amino group may be present in a polymer backbone or a pendent group, if present, of the (co)polyamines.

As examples of the (co)polyamines, mention may be made of chitosan, (co)polyallylamines, (co)polyvinylamines, (co)polyanilines, (co)polyvinylimidazoles,

(co)polydimethylaminoethylenemethacrylates, (co)polyvinylpyridines such as (co)poly-l-methyl-2-vinylpyridines, (co)polyimines such as (co) polyethyleneimines, (co)polypyridines such as (co)poly(quaternary pyridines), (co)polybiguanides such as (co)polyaminopropyl biguanides, (co)polylysines, (co)polyornithines, (co)polyarginines, (co)polyhistidines, aminodextrans, aminocelluloses, amino(co)polyvinylacetals, and salts thereof.

As the (co)polyamines, it is preferable to use (co)polylysines. Polylysine is well known. Polylysine can be a natural homopolymer of L-lysine that can be produced by bacterial fermentation. For example, polylysine can be ε-Poly-L-lysine, typically used as a natural preservative in food products. Polylysine is a polyelectrolyte which is soluble in polar solvents such as water, propylene glycol and glycerol. Polylysine is commercially available in various forms, such as poly D-lysine and poly L-lysine. Polylysine can be in salt and/or solution form.

(14) Cationic Polyaminoacids

As the cationic polymer, it may be possible to use cationic polyaminoacids, which may be cationic homopolymers or copolymers, with a plurality of amino groups and carboxyl groups. The amino group may be a primary, secondary, tertiary or quaternary amino group. The amino group may be present in a polymer backbone or a pendent group, if present, of the cationic polyaminoacids. The carboxyl group may be present in a pendent group, if present, of the cationic polyaminoacids.

As examples of the cationic polyaminoacids, mention may be made of cationized collagen, cationized gelatin, steardimonium hydroxypropyl hydrolyzed wheat protein, cocodimonium hydroxypropyl hydrolyzed wheat protein, hydroxypropyltrimonium hydrolyzed conchiolin protein, steardimonium hydroxypropyl hydrolyzed soy protein, hydroxypropyltrimonium hydrolyzed soy protein, cocodimonium hydroxypropyl hydrolyzed soy protein, and the like.

It may be preferable that the cationic polymer be selected from the group consisting of cyclopolymers of alkyldiallylamine and cyclopolymers of dialkyldiallylammonium such as (co)polydiallyldialkyl ammonium chloride, (co)polyamines such as (co)polylysines, cationic (co)polyaminoacids such as cationized collagen, and salts thereof.

It is preferable that the (b) cationic polymer be a polyquaternium polymer or a polymeric quaternary ammonium salt.

Polymeric quaternary ammonium salts are cationic polymers comprising at least one quaternized nitrogen atom. Mention may in particular be made, as polymeric quaternary ammonium salts, of the Polyquaternium products (CTFA name), which contribute mainly to the quality of foam and feeling of the skin after use, in particular the feeling of the skin after use. These polymers can preferably be chosen from the following polymers:

Polyquaternium-5, such as the product Merquat 5 sold by Nalco;

Polyquaternium-6, such as the product Salcare SC 30 sold by BASF and the product Merquat 100 sold by Nalco;

Polyquaternium-7, such as the products Merquat S, Merquat 2200, Merquat 7SPR, and Merquat 550 sold by Nalco and the product Salcare SC 10 sold by BASF;

Polyquaternium- 10, such as the product Polymer JR400 sold by Amerchol;

Polyquaternium- 11 , such as the products Gafquat 755, Gafquat 755N and Gafquat 734 sold by ISP;

Polyquaternium- 15, such as the product Rohagit KF 720 F sold by Rohm;

Polyquaternium- 16, such as the products Luviquat FC905, Luviquat FC370, Luviquat HM552 and Luviquat FC550 sold by BASF;

Polyquaternium-28, such as the product Styleze CC10 sold by ISP;

Polyquaternium-44, such as the product Luviquat Care sold by BASF;

Polyquaternium-46, such as the product Luviquat Hold sold by BASF; and

Polyquaternium-47, such as the product Merquat 2001 sold by Nalco.

Preferably, the (b) cationic polymer can be selected from the copolymers of families (1), (2), and (9), and any combinations thereof. In particular, the (b) cationic polymer comprises at least the copolymers of family (1). Especially, the (b) cationic polymer comprises the copolymers of families (2) and/or (9) in addition to the copolymers of family (1). In particular, the (b) cationic polymer comprises Polyquaternium-11.

The (b) cationic polymer may be present in a content of 0.5% by weight or more, preferably 1% by weight or more, and more preferably 1.5% by weight or more, relative to the total weight of the composition. The (b) cationic polymer may be present in a content of 30% by weight or less, preferably 20% by weight or less, and more preferably 15% by weight or less, ^' relative to the total weight of the composition. The (b) cationic polymer may be present in a content ranging from 0.5% to 30% by weight, preferably from 1% to 20% by weight, and more preferably from 1.5% to 15% by weight, relative to the total weight of the composition.

(pH and Optional Ingredients)

The pH of the composition according to the present invention may be adjusted to the desired value using acidifying or basifying agents commonly used in the technical field of coloring keratin fibers. The pH of the composition according to the present invention may be preferably from 1 to 6, more preferably from 2 to 5, and even more preferably from 2 to 4, and most preferably from 2 to 3.

Among the acidifying agents, mention may be made, by way of example, of mineral or organic acids such as hydrochloric acid, ortho-phosphoric acid, sulfuric acid, carboxylic acids such as acetic acid, tartaric acid, citric acid, and lactic acid, and sulfonic acids.

Among the basifying agents, mention may be made, by way of example, of sodium hydroxide, ammonium hydroxide, alkali metal carbonates, alkanolamines such as mono-, di- and triethanolamines and also their derivatives, sodium or potassium hydroxide and compounds of the formula below:

d wherein

W denotes an alkylene such as propylene optionally substituted by a hydroxyl or a Ci-C₄ alkyl radical, and _a, Rb, Rc and a independently denote a hydrogen atom, an alkyl radical or a d-C₄ hydroxyalkyl radical, which may be exemplified by 1,3-propanediamine and

derivatives thereof. Sodium or potassium hydroxide may also be preferable.

The acidifying or basifying agent may be used in an amount ranging from 0.001 to 15%) by weight, preferably from 0.01 to 10%) by weight, and more preferably from 0.1 to 5% by weight, relative to the total weight of the composition.

The composition according to the present invention may preferably comprise propylene glycol. The use of propylene glycol may be preferable since it can improve the volumizing effect of keratin fibers of the present invention. The amount of the propylene glycol included in the composition according to the present invention is not limited, but may be from 0.01 to 30% by weight, preferably from 0.1 to 25% by weight, and more preferably from 1 to 20% by weight relative to the total weight of the composition according to the present invention.

The composition according to the present invention may comprise at least one oxidizing agent.

The oxidizing agent may be chosen from hydrogen peroxide, peroxygenated salts, and compounds capable of producing hydrogen peroxide by hydrolysis. For example, the oxidizing agent can be chosen from aqueous hydrogen peroxide solution, urea peroxide, alkali metal bromates and ferricyanides and persalts such as perborates and persulphates. At least one oxidase enzyme chosen, for example, from laccases, peroxidases and 2-electron oxidoreductases such as uricase may also be used as the oxidizing agent, where appropriate in the presence of the respective donor or co-factor thereof.

In one embodiment, the oxidizing agent is hydrogen peroxide, such as an aqueous hydrogen peroxide solution. The hydrogen peroxide concentration may range from 0.15 wt% to 12 wt% such as from 0.6 wt% to 9 wt% relative to the total weight of the (c) oxidizing agent. The concentration of compounds capable of forming hydrogen peroxide by hydrolysis may range from 0.1 wt% to 25 wt% relative to the total weight of the oxidizing agent. In one embodiment, when the oxidizing agent is an aqueous hydrogen peroxide solution, the aqueous solution may comprise at least one hydrogen peroxide stabilizer, which may be chosen, for example, from alkali metal and alkaline-earth metal pyrophosphates, alkali metal and alkaline-earth metal stannates, phenacetin and salts of acids and of oxyquinoline, for example, oxyquinoline sulphate. In another embodiment, at least one stannate optionally in combination with at least one pyrophosphate is used.

It is also possible to use salicylic acid and its salts, pyridinedicarboxylic acid and its salts, paracetamol. In the oxidizing agent in the form of an aqueous hydrogen peroxide solution, the

concentration of the hydrogen peroxide stabilizer may range from 0.0001 wt% to 5 wt% such as from 0.01 wt% to 2 wt% relative to the total weight of the (c) oxidizing agent.

The amount of the oxidizing agent in the composition according to the present invention may range from 0.01% to 30% by weight, preferably from 0.1% to 20% by weight, and more preferably from 1% to 10% by weight, relative to the total weight of the composition.

The composition according to the present invention may comprise water. The amount of water in the composition according to the present invention may range from 50% to 99% by weight, preferably from 60% to 95% by weight, and more preferably from 70 to 90% by weight, relative to the total weight of the composition.

The composition according to the present invention may also contain various adjuvants conventionally used in compositions for coloring keratin fibers such as hair, such as oils, anionic, non-ionic, cationic, amphoteric or zwitterionic surfactants, or mixtures thereof, antioxidants, thickening agents, sequestering agents, fragrances, dispersing agents, conditioning agents, film-forming agents, ceramides, preservatives, for example, phenoxy ethanol, and opacifying agents.

The amount of the adjuvants included in the composition according to the present invention is not limited, but may be from 0.01 to 30% by weight relative to the total weight of the composition according to the present invention. The form of the composition according to the present invention is not particularly limited, as long as it is water-based, and may take various forms such as an emulsion (O/W or W/O form), an aqueous gel, an aqueous solution, or the like. It is preferable that the composition according to the present invention be in the form of a water-based solution. The composition according to the present invention can be used as a conditioning or a booster composition for use in coloring keratin fibers, for example by dyeing or bleaching the keratin fibers. Thus, the composition according to the present invention can be a cosmetic composition used in combination with compositions for coloring for keratin fibers, such as a composition including at least one oxidizing agent, a composition including at least one alkaline agent, or a combination thereof.

[Composition Including Oxidizing Agent]

The composition according to the present invention including the combination of the (a) malonic acid and the (b) cationic polymer can be used in combination with another composition including at least one oxidizing agent.

Hereafter, the composition including at least one oxidizing agent is referred to as first composition.

The oxidizing agent(s) which can be used in the first composition is (are) the same as explained above.

The first composition may comprise the oxidizing agent(s) in an amount of 0.01% to 30% by weight, preferably 0.1% to 20% by weight, and more preferably 1% to 10% by weight, relative to the total weight of the composition.

[Composition Including Alkaline Agent] The composition according to the present invention further including the oxidizing agent(s) can be used in combination with another composition including at least one alkaline agent.

Hereafter, the composition including at least one alkaline agent is referred to as second composition.

(Alkaline Agent)

The second composition comprises at least one alkaline agent. A single type of alkaline agent may be used, or two or more different types of alkaline agents may be used in combination. As the alkaline agents, mention may be made of any inorganic or organic basic agents which are commonly used in cosmetic products such as ammonia; alkanolamines such as mono-, di- and tri-ethanolamine, isopropanolamine; sodium and potassium hydroxides; urea, guanidine and their derivatives; basic amino acids such as lysine or arginine; and diamines such as those described in the structure below:

R_c

N-R-N

R / R_£ wherein R denotes an alkylene such as propylene optionally substituted by a hydroxyl or a C₁-C₄ alkyl radical, and R3, R₄, R5 and R₆ independently denote a hydrogen atom, an alkyl radical or a Ci-C₄ hydroxyalkyl radical, which may be exemplified by 1 ,3-propanediamine and derivatives thereof. Arginine and monoethanolamine are preferred. The alkaline agent may be used in an amount ranging from 0.001 to 15% by weight, preferably from 0.01 to 10% by weight, and more preferably from 0.1 to 5% by weight, relative to the total weight of the composition.

(Oxidation Dye)

The second composition may comprise at least one oxidation dye. A single type of oxidation dye may be used, or two or more different types of oxidation dyes may be used in

combination. The oxidation dye can be selected from oxidation bases, oxidation couplers, and the acid addition salts thereof.

The oxidation base can be selected from those conventionally known in oxidation dyeing, preferably from the group consisting of ortho- and para-phenylenediamines, double bases, ortho- and para-aminophenols, heterocyclic bases and the acid addition salts thereof.

There may be mentioned in particular:

- (I) the para-phenylenediamines of the following formula (I) and their addition salts with an acid:

in which:

Ri represents a hydrogen atom, a d-C₄ alkyl radical, a monohydroxy(C!-C₄ alkyl) radical, a polyhydroxy-(C₂-C4 alkyl) radical, a (C₁-C₄)alkoxy(C₁-C₄)alkyl radical, a d-C₄ alkylradical substituted with a nitrogen-containing group, a phenyl radical or a 4'-aminophenyl radical; R₂ represents a hydrogen atom, a C1-C4 alkyl radical, a monohydroxy(Ci-C₄ alkyl) radical, a polyhydroxy(C₂-C₄ alkyl) radical, a (C₁-C₄)alkoxy(C₁-C₄)alkyl radical or a Ci-C₄ alkyl radical substituted with a nitrogen-containing group;

Ri and R₂ may also form with the nitrogen atom carrying them a 5- or 6-membered nitrogen-containing heterocycle optionally substituted with one or more alkyl, hydroxyl or ureido groups;

R₃ represents a hydrogen atom, a halogen atom such as a chlorine atom, a Ci-C₄ alkyl radical, a sulpho radical, a carboxyl radical, a monohydroxy(C!-C₄ alkyl) radical, a hydroxy(Ci-C₄ alkoxy) radical, an acetylamino(C!-C₄ alkoxy) radical, a mesylamino(Ci-C₄ alkoxy) radical or a carbamoylamino(d-C₄ alkoxy) radical; and

R₄ represents a hydrogen or halogen atom or a C1-C4 alkyl radical.

Among the nitrogen-containing groups of formula (I) above, there may be mentioned in particular the amino, mono(Ci-C4)alkylamino, (Ci -C₄)dialkylamino, (Ci-C₄)trialkylamino, monohydroxy(Ci-C₄)alkylamino, di(monohydroxy(Ci-C₄)alkyl)amino, imidazolinium and ammonium radicals.

Among the para-phenylenediamines of formula (I) above, there may be mentioned more particularly para-phenylenediamine, para-tolylenediamine, 2-chloro-paraphenylenediamine, 2,3-dimethyl-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine,

2,6-diethyl-para-phenylenediamine, 2,5-dimethyl-para-phenylenediamine,

Ν,Ν-dimethylpara-phenylenediamine, N,N-diethyl-para-phenylenediamine,

Ν,Ν-dipropyl-paraphenylenediamine, 4-amino-N,N-diethyl-3-methylaniline,

N,N-bis(P-hydroxyethyl)-paraphenylenediamine,

4-N,N-bis(P-hydroxyethyl)amino-2-methylaniline,

4-N,N-bis(P-hydroxyethyl)amino-2-chloroaniline, 2-P-hydroxyethyl-para-phenylenediamine, 2-fluoro-paraphenylenediamine, 2-isopropyl-para-phenylenediamine,

N-( -hydroxypropyl)-paraphenylenediamine, 2-hydroxymethyl-para-phenylenediamine, N,N-dimethyl-3-methylpara-phenylenediamine,

N,N-(ethyl- -hydroxyethyl)-para-phenylenediamine,

N-( ,y-dihydroxypropyl)-para-phenylenediamine,

N-(4'-aminophenyl)-para-phenylenediamine, N-phenyl-para-phenylenediamine,

2-P-hydroxyethyloxy-para-phenylenediamine,

2-P-acetylamino-ethyloxy-para-phenylenediamine,

N-( -methoxyethyl)-para-phenylenediamine,

2-methyl- 1 -Ν-β-hydroxyethyl-para-phenylenediamine,

N-(4-aminophenyl)-3 -hydroxy-pyrrolidine,

2-[{2-[(4-Aminophenyl)amino]ethyl}(2-hydroxyethyl)amino]-ethanol, and their addition salts with an acid.

Among the para-phenylenediamines of formula (I) above, there are most particularly preferred para-phenylenediamine, para-tolylenediamine, 2-isopropyl-paraphenylenediamine, 2- -hydroxyethyl-para-phenylenediamine, 2-P-hydroxyethyloxy-para-phenylenediamine, 2,6-dimethyl-para-phenylenediamine, 2,6-diethyl-para-phenylenediamine,

2,3-dimethyl-para-phenylenediamine, N,N-bis(P-hydroxyethyl)-para-phenylenediamine, 2-chloro-para-phenylenediamine, and their addition salts with an acid.

- (II) According to the present invention, the term "double bases" is understood to mean compounds containing at least two aromatic rings on which amino and/or hydroxyl groups are carried.

Among the double bases which can be used as oxidation bases in the dyeing compositions in accordance with the present invention, there may be mentioned in particular compounds corresponding to the following formula (II), and their addition salts with an acid:

in which:

- Zi and Z₂, which are identical or different, represent a hydroxyl or -NH₂ radical which may be substituted with a Ci-C₄ alkyl radical or with a linking arm Y;

- the linking arm Y represents a linear or branched alkylene chain comprising from 1 to 14 carbon atoms, which may be interrupted by or which may end with one or more

nitrogen-containing groups and/or one or more heteroatoms such as oxygen, sulphur or nitrogen atoms, and optionally substituted with one or more hydroxyl or Ci-C₆ alkoxy radicals;

- R.5 and R₆ represent a hydrogen or halogen atom, a C1-C4 alkyl radical, a

monohydroxy(C!-C4 alkyl) radical, a polyhydroxy(C₂-C4 alkyl) radical, an amino(C₁-C₄ alkyl) radical or a linking arm Y;

- R.7, Rs, Rs>, Rio, Rii and Ri₂, which are identical or different, represent a hydrogen atom, a linking arm Y or a C1-C4 alkyl radical; it being understood that the compounds of formula (II) contain only one linking arm Y per molecule, Among the nitrogen-containing groups of formula (II) above, there may be mentioned in particular the amino, mono(Ci-C4)alkylamino, (Ci-C₄)dialkylamino, (Ci-C4)trialkylamino, monohydroxy(C₁-C4)alkylamino, imidazolinium and ammonium radicals.

Among the double bases of formulae (II) above, there may be mentioned more particularly N,N'-bis(P-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-l,3-diaminopropanol,

N,N'-bis( -hydroxyethyl)-N,N'-bis(4'-aminophenyl)ethylenediamine,

N,N'-bis(4-aminophenyl)-tetramethylenediamine,

N,N'-bis(P-hydroxyethyl)-N,N'-bis(4-aminophenyl)tetramethylenediamine,

N,N'-bis(4-methylaminophenyl)tetramethylenediamine,

N,N'-bis(ethyl)-N,N'-bis(4'-amino-3'-methylphenyl)ethylene-diamine,

l,8-bis(2,5-diaminophenoxy)-3,5-dioxaoctane, and their addition salts with an acid.

Among these double bases of formula (II),

N,N'-bis(P-hydroxyethyl)-N,N'-bis(4'-aminophenyl)-l,3-diaminopropanol,

1 ,8-bis(2,5-diaminophenoxy)-3,5-dioxaoctane or one of their addition salts with an acid are particularly preferred.

- (HI) The para-aminophenols corresponding to the following formula (III), and their addition salts with an acid:

in which:

- Ri₃ represents a hydrogen atom, or a halogen atom such as fluorine, a Ci-C₄ alkyl, monohydroxy(Ci-C₄ alkyl), (Ci-C4)alkoxy(C₁-C₄)-alkyl, amino(Ci-C4 alkyl) or

hydroxy(Ci-C₄)alkylamino-(Ci-C₄ alkyl) radical,

- Ri4 represents a hydrogen atom, or a halogen atom such as fluorine, a Ci-C₄ alkyl, monohydroxy(G-C₄ alkyl), polyhydroxy(C₂-C₄ alkyl), amino(Ci-C₄ alkyl), cyano(Ci-C₄ alkyl) or (C₁-C₄)alkoxy(Ci-C₄)alkyl radical.

Among the para-aminophenols of formula (III) above, there may be mentioned more particularly para-aminophenol, 4-amino-3-methylphenol, 4-amino-3-fluorophenol,

4-amino-3 -hydro xymethylphenol, 4-amino-2-methylphenol, 4-amino-2-hydroxymethylphenol, 4-amino-2-methoxymethylphenol, 4-amino-2-aminomethylphenol,

4- amino-2-( -hydroxyethylaminomethyl)phenol, and their addition salts with an acid.

- (IV) The ortho-aminophenols which can be used as oxidation bases in the context of the present invention are chosen in particular from 2-aminophenol,

2- amino- 1 -hydroxy-5-methylbenzene, 2-amino- 1 -hydroxy-6-methylbenzene,

5- acetamido-2-aminophenol, and their addition salts with acid.

-(V) Among the heterocyclic bases which can be used as oxidation bases in the dyeing compositions in accordance with the present invention, there may be mentioned more particularly pyridine derivatives, pyrimidine derivatives, pyrazole derivatives, and their addition salts with an acid.

Among the pyridine derivatives, there may be mentioned more particularly the compounds described for example in Patents GB 1,026,978 and GB 1,153,196, such as

2,5-diaminopyridine, 2-(4-methoxyphenyl)amino-3-aminopyridine,

2.3- diamino-6-methoxypyridine, 2-(P-methoxyethyl)amino-3-amino-6-methoxypyridine,

3.4- diaminopyridine, and their addition salts with an acid. Among the pyrimidine derivatives, there may be mentioned more particularly the compounds described, for example, in Patents DE 2 359 399; JP 88-169571 ; and JP 91-10659 or patent application WO 96/15765, such as 2,4,5, 6-tetraaminopyrimidine,

4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine,

2,4-dihydroxy-5,6-diaminopyrimidine, 2,5,6-triamino-pyrimidine, and the pyrazolopyrimidine derivatives such as those mentioned in patent application FR-A-2 750 048 and among which there may be mentioned pyrazolo[l,5-a]-pyrimidine-3,7-diamine;

2,5 -dimethyl-pyrazolo [ 1 ,5 -a] -pyrimidine-3 ,7-diamine;

pyrazolo[l,5-a]pyrimidine-3,5-diamine; 2,7-dimethylpyrazolo[l,5-a]pyrimidine-3,5-diamine;

3- aminopyrazolo[l ,5-a]pyrimidin-7-ol; 3-amino-pyrazolo[l ,5-a]pyrimidin-5-ol;

2-(3-amino-pyrazolo-[l ,5-a]pyrimidin-7-ylamino)ethanol, 2-(7-aminopyrazolo[l,5-a]pyrimidin-3-ylamino)ethanol,

2- [(3 -amino-pyrazolo [ 1 ,5 -a]pyrimidin-7-yl)-(2-hydroxy-ethyl)amino] -ethanol,

2- [(7-arninopyrazolo[l,5-a]-pyrimidin-3-yl)-(2-hydroxyethyl)amino]ethanol,

5,6-dimetliylpyrazolo-[l,5-a]pyrimidine-3,7-diamine,

2,6-dimethylpyrazolo-[l,5-a]pyrimidine-3,7-diamine,

2,5 ,N7,N7-tetramethyl-pyrazolo [ 1 ,5 -a]pyrimidine-3 ,7-diamine,

3- amino-5-methyl-7-imidazolylpropyl-aminopyrazolo[l,5-a]-pyrimidine, their addition salts and their tautomeric forms when a tautomeric equilibrium exists, and their addition salts with an acid.

Among the pyrazole derivatives, there may be mentioned more particularly the compounds described in Patents DE 3 843 892, and DE 4 133 957 and patent applications WO 94/08969, WO 94/08970, FR-A-2 733 749 and DE 195 43 988 such as 4,5-diamino-l-methylpyrazole,

3.4- diaminopyrazole, 4,5-diamino- 1 -(4' -chlorobenzyl)-pyrazole,

4,5-diamino- 1 ,3-dimethylpyrazole, 4,5-diamino-3-methyl- 1 -phenylpyrazole,

4.5- diamino-l-methyl-3-phenylpyrazole, 4-amino-l,3-dimethyl-5-hydrazino-pyrazole, 1 -benzyl-4,5-diamino-3-methyl-pyrazole, 4,5-diamino-3-tert-butyl- 1 -methylpyrazole,

4,5-diamino-l-tertbutyl-3-methylpyrazole, 4,5-diamino-l-(P-hydroxyethyl)-3-methylpyrazole, 4,5-diamino- l-(p-hydroxyethyl)pyrazole, 4,5-diamino-l-ethyl-3-methylpyrazole,

4,5-diamino-l-ethyl-3-(4'-methoxyphenyl)pyrazole,

4,5-diamino- 1 -ethyl-3 -hydroxy-methylpyrazole,

4,5-diamino-3-hydroxymethyl- 1 -methylpyrazole,

4,5-diamino-3-hydroxymethyl- 1 -isopropyl-pyrazole,

4,5-diamino-3 -methyl- 1 -isopropyl-pyrazole,

4-amino-5-(2'-aminoethyl)amino-l,3-dimethylpyrazole, 3,4,5-triaminopyrazole,

1 -methyl-3,4,5-triamino-pyrazole, 3,5-diamino- 1 -methyl-4-methylaminopyrazole,

3,5-diamino-4-( -hydroxy-ethyl)amino-l-methylpyrazole, and their addition salts with an acid. Among the heterocyclic bases which can be used as oxidation bases, there may be mentioned more particularly diaminopyrazolopyrazolones and especially

2,3-diamino-6,7-dihydro-lH5H-[pyrazolol,2,a]pyrazol-l-one and the addition salts of these diaminopyrazolopyrazolones with an acid. The oxidation dye may be an oxidation coupler which can be selected from those

conventionally known in oxidation dyeing, preferably from the group consisting of

meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthols, heterocyclic couplers and the acid addition salts thereof. The heterocyclic couplers may be selected from the group consisting of indole derivatives, indoline derivatives, sesamol and its derivatives, pyridine derivatives, pyrazolotriazole derivatives, pyrazolones, indazoles, benzimidazoles, benzothiazoles, benzoxazoles,

1,3-benzodioxoles, quinolines and their addition salts with an acid. These couplers are more particularly chosen from 2,4-diamino-l-(P-hydroxyethyloxy)benzene, 2-methyl-5-aminophenol, 5-N-( -hydroxyethyl)amino-2-methylphenol, 3-aminophenol, 2-chloro-3-amino-6-methylphenol, 1 ,3-dihydroxybenzene, 1 ,3-dihydroxy-2-methylbenzene,

4- chloro-l,3-dihydroxybenzene, 2-amino-4-(P-hydroxyethylamino)-l-methoxybenzene, 1 ,3-diaminobenzene, 2-methyl-5-hydroxyethylaminophenol, 4-amino-2-hydroxytoluene, l,3-bis(2,4-diaminophenoxy)-propane, sesamol, 1 -amino-2-methoxy-4,5-methylene-dioxybenzene, α-naphthol, 6-hydroxyindole,

4-hydroxyindole, 4-hydroxy-N-methylindole, 6-hydroxy-indoline,

2,6-dihydroxy-4-methylpyridine, 1 -H-3-methylpyrazol-5-one,

1 -phenyl-3-methylpyrazol-5-one, 2-amino-3 -hydro xypyridine,

3,6-dimethyl-pyrazolo[3,2-c]-l,2,4-triazole, 2,6-dimethylpyrazolo[l,5-b]-l,2,4-triazole and their addition salts with an acid.

In general, the addition acid salts of the oxidation bases and couplers are chosen in particular from hydrochlorides, hydrobromides, sulphates, tartrates, lactates and acetates.

The second composition may comprise an oxidation dye or dyes in an amount of 0.0001 to 20 wt%, preferably 0.0005 to 15 wt%, and more preferably 0.005 to 10 wt%, relative to the total weight of the composition. (Optional Ingredients)

The first and second compositions may also contain various adjuvants conventionally used in compositions for coloring keratin fibers such as hair, such as oils, anionic, non-ionic, cationic, amphoteric or zwitterionic surfactants, or mixtures thereof, anionic, non-ionic, cationic, amphoteric or zwitterionic polymers, or mixtures thereof, antioxidants, neutralizers, thickening agents, sequestering agents, stabilizers, pH adjusting agents, fragrances, dispersing agents, conditioning agents, film-forming agents, ceramides, preservatives and opacifying agents. The first and second compositions may comprise water.

The amount of water in the first and second compositions may range from 50% to 99% by weight, preferably from 60% to 95% by weight, and more preferably from 70 to 90% by weight, relative to the total weight of the composition.

The form of the first and second compositions is not particularly limited, as long as it is water-based, and may take various forms such as an emulsion (O/W or W/O form), an aqueous gel, an aqueous solution, or the like. It is preferable that the first and second compositions be in the form of a water-based solution.

[Preparation]

The composition according to the present invention can be prepared by mixing the ingredients (a) and (b), as essential ingredients, and optional ingredient(s), if necessary, as explained above.

If the composition according to the present invention is used in combination with the first composition, the composition according to the present invention can be mixed with the first composition for its use. The first composition can be prepared by mixing oxidizing agent(s), as essential ingredient(s), and optional ingredient(s), if necessary, as explained above. The mixing ratio of the composition according to the present invention and the first composition is not limited. The mixing ratio may be 1 :50 to 1 : 1, preferably 1 :40 to 1 :2, and more preferably 1 :30 to 1 :5, as weight ratio.

If the composition according to the present invention is used in combination with the first and second compositions, the composition according to the present invention can be mixed with the first and second compositions for its use. The second composition can be prepared by mixing the alkaline agent(s), as essential ingredient(s), and optional ingredient(s), if necessary, as explained above. The mixing ratio of the composition according to the present invention, the first composition, and the second composition is not limited. The mixing ratio may be 1 :50:50 to 1 : 1 :1, preferably 1 :40:40 to 1 :2:2, and more preferably 1 :30:30 to 1 :5:5, as weight ratio.

The method and means to mix the above essential and optional ingredients are not limited. Any conventional method and means can be used to mix the above essential and optional ingredients to prepare the first or second composition.

[Ready-To-Use Composition] The present invention also relates to a ready-to-use cosmetic composition for keratin fibers, preferably hair, comprising:

the composition according to the present invention,

the first composition comprising at least one oxidizing agent, and

the second composition comprising at least one alkaline agent.

The ready-to-use composition according to the present invention can be applied, as it is, to keratin fibers such as hair, for coloring the keratin fibers by, for example, dyeing or bleaching the keratin fibers. The ready-to-use composition according to the present invention can be prepared by mixing the composition according to the present invention, the first composition, and the second composition. The mixing ratio of the composition according to the present invention, the first composition, and the second composition is not limited. The mixing ratio may be 1 :50:50 to 1 :1 : 1, preferably 1 :40:40 to 1 :2:2, and more preferably 1 :30:30 to 1 :5:5, as weight ratio.

The (a) malonic acid may be present in the ready-to-use composition according to the present invention in an amount of 0.005% by weight or more, preferably 0.025% by weight or more, and more preferably 0.05% by weight or more, relative to the total weight of the composition. The (a) malonic acid may be present in the ready-to-use composition according to the present invention in an amount of 1% by weight or less, preferably 0.75% by weight or less, and more preferably 0.5% by weight or less, relative to the total weight of the composition.

The amount of the (a) malonic acid in the ready-to-use composition according to the present invention may range from 0.005% to 1% by weight, preferably from 0.025% to 0.75% by weight, and more preferably from 0.05% to 0.5% by weight, relative to the total weight of the composition.

The (b) cationic polymer may be present in the ready-to-use composition according to the present invention in an amount of 0.025% by weight or more, preferably 0.05% by weight or more, and more preferably 0.075% by weight or more, relative to the total weight of the composition. The (b) cationic polymer may be present in the ready-to-use composition according to the present invention in an amount of 1.5% by weight or less, preferably 1% by weight or less, and more preferably 0.75% by weight or less, relative to the total weight of the composition.

The amount of the (b) cationic polymer present in the ready-to-use composition may range from 0.025% to 1.5% by weight, preferably from 0.05% to 1% by weight, and more preferably from 0.075% to 0.75% by weight, relative to the total weight of the composition.

[Kit and Process]

The present invention also relates to a kit for keratin fibers, preferably hair, comprising: a first compartment comprising the first composition comprising at least one oxidizing agent, a second compartment comprising the second composition comprising at least one alkaline agent, and

a third compartment comprising the composition according to the present invention. It is possible to use the kit by, for example, dispensing or discharging the first composition from the first compartment, while dispensing or discharging the second composition from the second compartment and/or dispensing or discharging the composition according to the present invention from the third compartment, followed by treating keratin fibers such as hair with the mixture of the first and second compositions and the composition according to the present invention.

In another embodiment, the composition according to the present invention can be mixed with at least one oxidizing agent before it is charged in a compartment of the kit. Therefore, the present invention also relates to a kit for keratin fibers, preferably hair, comprising:

a first compartment comprising the composition according to the present invention pre-mixed with at least one oxidizing agent, and

a second compartment comprising the second composition comprising at least one alkaline agent.

(1) mixing:

the composition according to the present invention,

the first composition comprising at least one oxidizing agent, and

the second composition comprising at least one alkaline agent to prepare the ready-to-use cosmetic composition, and

(2) applying the ready-to-use cosmetic composition to the keratin fibers.

It may be preferable that the cosmetic process according to the present invention comprise a step of washing, with or without drying, keratin fibers before and/or after the step of applying the ready-to-use cosmetic composition onto the keratin fibers. The step of applying the ready-to-use cosmetic composition onto the keratin fibers can be performed by a conventional applicator such as a brush, or even by the hands.

The keratin fibers to which the ready-to-use cosmetic composition has been applied can be left for an appropriate time which is required to treat the keratin fibers. The time length for the treatment is not limited, but it may be from 1 minute to 1 hour, preferably 1 minute to 30 minutes, and more preferably 1 minute to 15 minutes. For example, the time for dyeing the keratin fibers may be from 1 to 20 minutes, preferably 5 to 15 minutes.

The keratin fibers may be treated at room temperature. Alternatively, the keratin fibers can be heated at 25°C to 65°C, preferably 30°C to 60°C, more preferably 35°C to 55°C, and even more preferably 40°C to 50°C, before and/or during and/or after the step of applying the ready-to-use cosmetic composition onto the keratin fibers.

The present invention may also relate to a use of a combination of:

(a) malonic acid; and

(b) at least one cationic polymer

in a composition for coloring or bleaching keratin fibers, preferably in a composition for coloring keratin fibers comprising at least one oxidizing agent to prevent or reduce the loss of volume of keratin fibers when the keratin fibers are colored with the above composition for keratin fibers, with or without another composition including at least one alkaline agent, and/or when the colored keratin fibers are washed.

The above coloring is preferably for cosmetic purposes for the keratin fibers, for example, dyeing or bleaching the keratin fibers, preferably hair.

EXAMPLES

The present invention will be described in a more detailed manner by way of examples. However, these examples should not be construed as limiting the scope of the present invention.

Example 1 and Comparative Examples 1 to 3

[Preparation]

Each of the compositions according to Example Γ (Ex. 1) and Comparative Examples 1 to 3 (Comp. Ex. 1 to Comp. Ex. 3) was prepared by mixing the ingredients shown in Table 1. The numerical values for the amounts of the ingredients are all based on "% by weight" as active raw materials. Polyquaternium-11 was purchased from the company I.S.P. (Ashland).

[Evaluations] (Volumizing Effects) 0.6 g of each of the compositions according to Example 1 and Comparative Examples 1 to 3 was mixed with 6 g of Composition A and 6g of Composition B with the following formulations. Therefore the weight ratio of each of the compositions according to Example 1 and Comparative Examples 1 to 3 : Composition A : Composition B was 1 : 10: 10. Composition A

Three hair swatches (1 g, 20 cm) were prepared for each experiment. 4 g of the mixture obtained as above was applied onto 1 g of hair swatch for each sample. The swatch was then left for 30 minutes at room temperature, followed by shampooing and rinsing with tap water. The swatch was hung downwardly and dried at 25 °C under relative humidity of 30-50% over night. The dried swatch was cut such that the length between the root of the swatch and the cut point (tip of the swatch) was 15 cm. The root of the swatch was fixed on a plate. On the other hand, the tip of the swatch was held and oriented upwardly, and the tip of the swatch was then released such that the tip of the swatch could point downwardly. The vertical angle between the plate and the tip of the hair fiber was measured (cf. Fig. 1). The average value of the three swatches was determined for the vertical angle with regard to the hair fibers in the swatch.

The larger the vertical angle is, the better the volumizing effect is. The measured vertical angle was evaluated in accordance with the evaluation criteria shown below.

Good: over 80° Fair: 77-80°

Poor: less than 77°

The results are shown in Table 1.

(Long Lasting Effects)

The swatch used in the evaluation of the above "Volumizing Effects" was shampooed five times. The swatch was hung downwardly and dried overnight at 25 °C under relative humidity of 30-50%. The root of the swatch was fixed on a plate. On the other hand, the tip of the swatch was held and oriented upwardly, and the tip of the swatch was then released such that the tip of the swatch could point downwardly. The vertical angle between the plate and the tip of the hair fiber was measured (cf. Fig. 1). The average value of the three swatches was determined for the vertical angle with regard to the hair fibers in the swatch.

The larger the vertical angle is, the better the long lasting effect is. The measured vertical angle was evaluated in accordance with the evaluation criteria shown below.

Good: over 80°

Fair: 77-80°

Poor: less than 77°

The results are shown in Table 1.

Table 1

It can be recognized from the comparisons of Example 1 and Comparative Examples 1 to 3, shown in Table 1 , that, when a composition for keratin fibers such as hair contains malonic acid and a cationic polymer such as polyquaternium- 11, the composition can improve both volumizing and long-lasting effects. On the other hand, the composition according to Comparative Example 1, which does not include malonic acid, showed good long lasting effects but did not show good volumizing effects. The composition according to

Comparative Example 2, which includes citric acid instead of malonic acid, did not show good volumizing effects and showed inferior long lasting effects. Similarly, the composition according to Comparative Example 3, which does not include any cationic polymer, did not show good volumizing effects and showed inferior long lasting effects.

Therefore, it can be concluded that the composition according to the present invention can be very preferable for use to impart hair volumizing effects and long lasting effects to colored keratin fibers.

Claims

A composition for use in coloring or bleaching keratin fibers, preferably hair, comprising:

(a) malonic acid; and

(b) at least one cationic polymer.

The composition according to Claim 1, wherein the (b) cationic polymer has a unit derived from vinylpyrrolidone.

3. The composition according to Claim 2, wherein the (b) cationic polymer is selected from

copolymers comprising vinylpyrrolidone units and

ethacrylamidopropyltrimethylammonium units, and

copolymers comprising vinylpyrrolidone units and methylvinylimidazolium units. 4. The composition according to Claim 3, wherein the copolymers comprising

vinylpyrrolidone units and dimethylaminoethyl methacrylate units are chosen from: vinylpyrrolidone/dimethylaminoethyl methacrylate copolymers;

vinylpyrrolidone/ dimethylaminoethyl methacrylate/hydrophilic polyurethane copolymers;

quaternized or non-quaternized vinylpyrrolidone/dimethylaminoethyl methacrylate/C₈-Ci₆ olefin copolymers; and

vinylpyrrolidone/dimethylaminoethyl methacrylate/vinylcaprolactam copolymers.

The composition according to any one of Claims 1 to 4, wherein the amount of the

(a) malonic acid ranges from 0.1% to 20% by weight, preferably from 0.5% to 15% by weight, and more preferably from 1% to 10% by weight, relative to the total weight of the composition.

The composition according to any one of Claims 1 to 5, wherein the amount of the

(b) cationic polymer ranges from 0.5% to 30% by weight, preferably from 1% to 20% by weight, and more preferably from 1.5% to 15% by weight, relative to the total weight of the composition.

The composition according to any one of Claims 1 to 6, further comprising propylene glycol.

The composition according to Claim 7, wherein the amount of the propylene glycol ranges from 0.01 to 30% by weight, preferably from 0.1 to 25% by weight, and more preferably from 1 to 20% by weight relative to the total weight of the composition.

The composition according to any one of Claims 1 to 8, comprising at least one oxidizing agent.

10. The composition according to Claim 9, wherein the oxidizing agent is hydrogen peroxide.

11. The composition according to Claim 9 or 10, wherein the amount of the oxidizing agent ranges from 0.01% to 30% by weight, preferably from 0.1% to 20% by weight, and more preferably from 1% to 10% by weight, relative to the total weight of the composition.

12. A ready-to-use cosmetic composition for keratin fibers, preferably hair, comprising: the composition according to any one of Claims 1 to 8,

a first composition comprising at least one oxidizing agent, and

a second composition comprising at least one alkaline agent.

13. A kit for keratin fibers, preferably hair, comprising:

a first compartment comprising the composition according to any one of Claims 9 to 11 , and

14. A kit for keratin fibers, preferably hair, comprising:

a first compartment comprising a first composition comprising at least one oxidizing agent,

a third compartment comprising the composition according to any one of Claims 1 to 8.

15. A cosmetic process for keratin fibers, preferably hair, comprising the steps of:

(1) mixing:

the composition according to any one of Claims 1 to 8,

a first composition comprising at least one oxidizing agent, and

(2) applying the ready-to-use cosmetic composition to the keratin fibers.