Cosmetic composition comprising piroctone olamine salt, at least 1% nicotinamide and ginger root extract

Abstract

The present invention relates to a cosmetic composition comprising a piroctone olamine salt, at least 1% by weight of nicotinamide and a ginger root extract. The invention also relates to a method for the cosmetic treatment of human keratin materials, such as the skin, in particular the human scalp, hair and / or eyelashes, comprising at least the application of a cosmetic composition according to the invention. The invention also relates to the use of said cosmetic composition for treating loss of keratin fibres and / or promoting regeneration of keratin fibres. The invention also relates to the use of said cosmetic composition for the cosmetic treatment of dandruff.

Description

Technical Field

[0001] The present invention relates to a cosmetic composition comprising piroctone olamine, at least 1% by weight of niacinamide, and ginger root extract.

[0002] The present invention also relates to a method for the cosmetic treatment of human keratin materials, such as the skin, in particular the human scalp, hair and / or eyelashes, said method comprising at least the application of a cosmetic composition according to the invention.

[0003] The present invention also relates to the use of said cosmetic composition for treating the loss of keratin fibers and / or promoting the regeneration of keratin fibers.

[0004] The present invention also relates to the use of said cosmetic composition for the cosmetic treatment of dandruff.

[0005] The present invention relates to the field of cosmetic treatment of human keratin materials, in particular human keratin fibers, such as human hair, eyebrows, eyelashes and / or body hair, especially beard, mustache and pubic hair, and the skin (especially the scalp) and skin areas (especially bald or non-bald areas, preferably bald areas) covering such keratin fibers as mentioned above. More particularly, the present invention relates to the cosmetic treatment of human hair and / or eyelashes and / or skin, preferably hair and / or scalp. Background Art

[0006] The growth and renewal of human hair are mainly determined by the activity of hair follicles and their dermal-epidermal environment. Their activity is cyclical and basically includes three phases, namely anagen, catagen and telogen.

[0007] The anagen phase (corresponding to the active or growth phase), which lasts for several years and during which the hair grows longer, is followed by a very short and transient catagen phase that lasts for several weeks. During this phase, the hair bundle undergoes changes, the hair follicle atrophies, and its dermal implantation position appears to move increasingly upward.

[0008] The final stage, which lasts for several months, corresponds to a resting phase called telogen. At the end of this resting phase, the hair falls out and is replaced by new hair follicles in the anagen phase, thus starting another hair cycle.

[0009] Therefore, hair is constantly renewed, and among the approximately 150,000 individual hairs that make up a full head of hair, at any given time, approximately 10% are in a dormant state and will therefore be replaced in the next few months.

[0010] Hair loss refers to the accelerated loss of hair, eyelashes, eyebrows and / or body hair on any part of the body. It usually occurs in individuals with a genetic predisposition and mainly affects men. This is called androgeneticalopecia or androgenic alopecia, or even androgeno-genetic alopecia.

[0011] Hair loss is essentially due to a disorder in hair renewal, which initially leads to an accelerated frequency of the cycle, at the expense of hair quality and then its quantity. This results in a gradual impoverishment of hair through the regression of "terminal" hair to the vellus stage. Certain areas are preferentially affected: especially in men, the temporal or frontal lobes and also the upper occipital lobe, while in women, diffuse hair loss on the crown of the head is visible.

[0012] Other causes can lead to severe temporary or permanent hair loss. These causes may include hair loss and damage after pregnancy (or post-partum), hair loss and damage during malnutrition or dietary imbalance, or even weakness or hormonal dysfunction (such as may occur during or after menopause). It can also be a case of hair loss or damage related to seasonal phenomena.

[0013] Hair loss can also affect eyelashes, eyebrows and / or body hair on any part of the human body, and can cause aesthetic dissatisfaction, just as hair loss affects one or more areas of the scalp.

[0014] Therefore, people prone to hair loss increasingly resort to cosmetic treatments that enable them to eliminate and / or reduce the effects of hair loss, and especially to reduce or delay the loss of hair, eyelashes and / or body hair, as well as to induce or stimulate their growth.

[0015] Such treatments generally consist of daily application to various hair loss areas of the body, especially to the hair loss areas of the scalp (such as the temporal or frontal lobes in men), or to areas of the body without hair (especially on the face, especially the beard, moustache and / or eyebrows), of a cosmetic composition containing one or more agents for combating hair loss and / or promoting hair regeneration.

[0016] For this purpose, mention may be made in particular of agents such as minoxidil, finasteride, unoxidil or stemoxydine as agents capable of reducing the loss of keratin fibres and / or promoting the regeneration of keratin fibres.

[0017] The duration of these treatments generally ranges from a few weeks to several months and may even last up to several years, and their long-term efficacy often depends on the user regularly and persistently applying the cosmetic composition to the area to be treated (which can be of varying sizes).

[0018] Treatments that are capable of reducing hair, eyelash, and / or body hair loss and / or promoting hair, eyelash, and / or body hair regrowth can in particular last for a few weeks, after which the desired effects (especially curbing hair loss) can start to be seen.

[0019] These treatments must be used daily to obtain significant efficacy.

[0020] However, these compositions still often have numerous application drawbacks that can have an adverse effect on the beauty treatments to be followed, in particular leading to more or less rapid abandonment of the treatment and thus to poor results in terms of limiting or even eliminating hair loss.

[0021] Specifically, many compositions contain gelling agents in order to prevent the composition from running onto the face, into the eyes, or down the nape of the neck. However, the use of gelling agents (especially in the case of daily use) can lead to the aggregation of keratin fibers, imparting a sticky effect to the entire head of hair that is unacceptable to the consumer.

[0022] To improve the efficacy of these treatments, it may be necessary to increase the amount of active agents, which can lead to difficulties in dissolving the active agents and to the formation of visible powder on the keratin fibers and the scalp during use. This powdery effect is also unacceptable to the consumer. Lotions for combating hair loss must be used daily to obtain significant efficacy. Some consumers wash their hair every day, in which case the product previously applied to the scalp is removed. Most consumers do not wash their hair every day, and thus the product applied the next day is added to the product applied on the first day. This is known as the cumulative effect. In the case of such repeated application without washing the scalp, the powder may appear from the first day, usually on the second day. The appearance of this powder is caused by the precipitation of solid compounds in the formulation when the solvent evaporates.

[0023] Therefore, the insufficient application quality of these compositions may in the long term hinder the user from persistently following beauty treatments for combating hair loss and / or promoting hair regrowth, especially when the efficacy of these treatments is mainly related to the daily and regular application of the previously described compositions to the area to be treated for several weeks or even months.

[0024] In other words, the lack of regularity or the too rapid abandonment of the treatment generally leads to adverse results in terms of the efficacy of combating hair loss and / or promoting hair regrowth, and thus to consumer dissatisfaction. This leads to even greater disappointment for consumers who do not have the time to observe the long-term evolution and / or efficacy of these treatments.

[0025] Consequently, there is a real need to overcome the drawbacks mentioned above, in particular by using a composition which is capable of treating, in a cosmetic and effective manner, the loss of human keratin fibers such as human hair, body hair and / or eyelashes, and / or promoting their regrowth, which composition has improved application properties, while in particular providing satisfactory visual effects, in particular without a greasy or sticky effect and without residues, and allowing good individualization of the fibers. The composition must also allow repeated application, i.e. allow the composition to be used daily. Summary of the Invention

[0026] This object is achieved by the present invention, the subject of which is in particular a cosmetic composition comprising:

[0027] i) ethanolamine piroctonate,

[0028] ii) at least 1% by weight of niacinamide, relative to the total weight of the composition, and

[0029] iii) ginger root extract.

[0030] The cosmetic composition according to the invention allows to obtain a head of hair showing good individualization of the keratin fibers without aggregation or stickiness.

[0031] The cosmetic composition of the invention does not transfer the product to the fingers during application or during the day. Thus, the fingers are not greasy or sticky when using the composition.

[0032] The cosmetic composition according to the invention also has improved application properties by avoiding the production of a powdery effect on the keratin fibers and / or the scalp, in particular in the case of repeated applications required for frequent use.

[0033] In terms of its efficacy in combating the loss of keratin fibers and / or promoting the regrowth of keratin fibers and / or combating dandruff, the cosmetic composition according to the invention is also entirely satisfactory. The composition also has a beneficial effect on increasing the diameter of the keratin fibers and strengthening the fibers against breakage.

[0034] In addition, the composition according to the invention imparts good cosmetic properties (in particular conditioning properties) to the keratin fibers, particularly in terms of shine, softness, detangling and smoothness.

[0035] The present invention also relates to a method for the cosmetic treatment of human keratin materials, such as skin, in particular the human scalp, hair and / or eyelashes, said method comprising at least the application of a cosmetic composition according to the invention.

[0036] The present invention also relates to the use of said cosmetic composition for treating the loss of keratin fibers and / or promoting the regeneration of keratin fibers and / or for the cosmetic treatment of dandruff.

[0037] The term "treatment of dandruff" means the cosmetic treatment of dandruff, in particular delaying or preventing its appearance.

[0038] The present invention also relates to the use of said cosmetic composition for increasing the diameter of keratin fibers and / or for strengthening keratin fibers against breakage.

[0039] Other subjects, features, aspects and advantages of the present invention will become even clearer on reading the following description and examples.

[0040] In the text below, unless otherwise indicated, the limits of the ranges of values are included in the range, in particular in the expressions "between... and" and "ranging from... to...".

[0041] i) Ethanolamine piroctone

[0042] The cosmetic composition according to the invention comprises piroctone olamine.

[0043] Piroctone olamine is the monoethanolamine salt of 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2(1H)-pyridinone.

[0044] Preferably, the total content of piroctone olamine ranges from 0.05% to 2% by weight, more preferably from 0.1% to 1% by weight, and preferably from 0.1% to 0.5% by weight relative to the total weight of the composition.

[0045] ii) Niacinamide

[0046] The cosmetic composition according to the invention further comprises nicotinamide (3-pyridinecarboxamide), the content of which is greater than or equal to 1% by weight relative to the total weight of the composition.

[0047] Nicotinamide is also known as niacinamide.

[0048] Preferably, the total content of nicotinamide ranges from 1% to 5% by weight, preferably from 1.5% to 4.5% by weight and more preferably from 2% to 4% by weight relative to the total weight of the composition.

[0049] iii) Ginger root extract

[0050] The cosmetic composition according to the invention further comprises ginger root extract (INCI name: Zingiber officinale Root Extract).

[0051] The ginger root extract may be in crushed, powdered or liquid form, preferably in liquid form.

[0052] The ginger root extract can in particular be obtained by supercritical CO2 extraction from ginger root fragments (such as ginger root powder).

[0053] The total content of the ginger root extract preferably ranges from 0.02% to 0.5% by weight, more preferably from 0.03% to 0.3% by weight, still more preferably from 0.05% to 0.2% by weight, relative to the total weight of the composition.

[0054] The cosmetic composition according to the invention may also optionally comprise 2,4-diaminopyrimidine 3-N-oxide (and / or its organic or inorganic salts and / or its hydrates) and / or one or more hydroxylated compounds having a melting point below 25 °C and a boiling point greater than or equal to 170 °C at atmospheric pressure (1.013×10 5 Pa), as defined below.

[0055] Preferably, the cosmetic composition according to the invention comprises 2,4-diaminopyrimidine 3-N-oxide and / or its organic or inorganic salts and / or its hydrates.

[0056] Preferably, the cosmetic composition according to the invention comprises one or more hydroxylated compounds having a melting point below 25 °C and a boiling point greater than or equal to 170 °C at atmospheric pressure (1.013×10 5 Pa).

[0057] Particularly preferably, the cosmetic composition according to the invention comprises 2,4-diaminopyrimidine 3-N-oxide (and / or its organic or inorganic salts and / or its hydrates) and one or more hydroxylated compounds having a melting point below 25 °C and a boiling point greater than or equal to 170 °C at atmospheric pressure (1.013×10 5 Pa).

[0058] iv) 2,4-Diaminopyrimidine 3-N-oxide

[0059] The cosmetic composition according to the invention may also optionally comprise 2,4-diaminopyrimidine 3-N-oxide and / or its organic or inorganic salts and / or its hydrates.

[0060] 2,4-Diaminopyrimidine 3-N-oxide (INCI name: Diaminopyrimidine Oxide) has the following formula:

[0061]

[0062] Among the organic or inorganic acid salts that can be used, hydrochloride, sulfate, citrate, and acetate can be specifically mentioned. As the hydrate, monohydrate can be specifically mentioned.

[0063] Preferably, the non-salified compound in the form of monohydrate is used.

[0064] When 2,4-diaminopyrimidine 3-N-oxide and / or its organic or inorganic acid salt and / or its hydrate are present in the cosmetic composition according to the present invention, their total content is preferably 0.05% to 8% by weight, more preferably 0.1% to 5% by weight, even more preferably 0.2% to 4% by weight, still better 0.5% to 3% by weight, and even still better 1% to 2% by weight relative to the total weight of the composition.

[0065] When 2,4-diaminopyrimidine 3-N-oxide and / or its hydrate (especially monohydrate) are present in the cosmetic composition according to the present invention, their content ranges from 0.05% to 8% by weight, still better 0.1% to 5% by weight, even still better 0.2% to 4% by weight, 0.5% to 3% by weight, and preferably 1% to 2% by weight relative to the total weight of the composition.

[0066] v) Specific hydroxylated compound

[0067] The cosmetic composition according to the present invention may also optionally contain one or more hydroxylated compounds v), which have a melting point below 25 °C at atmospheric pressure (1.013×10 5 Pa) (for example, they are liquid at 25 °C and atmospheric pressure) and a boiling point greater than or equal to 170 °C.

[0068] Preferably, the hydroxylated compound having a melting point below 25 °C at atmospheric pressure (1.013×10 5 Pa) and a boiling point greater than or equal to 170 °C is composed of a C2-C8 hydrocarbon chain optionally inserted with an oxygen atom and containing one or two free hydroxyl groups (-OH) carried by different carbon atoms.

[0069] These compounds can be cyclic or acyclic, straight-chain or branched-chain, saturated or unsaturated.

[0070] Preferably, having a melting point below 25 °C at atmospheric pressure (1.013×10 5The hydroxylated compound v) having a melting point below 25 °C and a boiling point of 170 °C or higher at atmospheric pressure (1.013×10

[0071] Propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, 1,3 - propanediol, benzyl alcohol, phenethyl alcohol (phenylethyl alcohol) and dipropylene glycol may be specifically mentioned, and even more preferably, the hydroxylated compound iv) is propylene glycol.

[0072] When the hydroxylated compound v) having a melting point below 25 °C and a boiling point of 170 °C or higher at atmospheric pressure (1.013×10 5 Pa) is present in the cosmetic composition according to the invention, its total content in the composition is greater than or equal to 1% by weight, preferably greater than or equal to 1.5% by weight relative to the total weight of the composition.

[0073] Preferably, when the hydroxylated compound v) having a melting point below 25 °C and a boiling point of 170 °C or higher at atmospheric pressure (1.013×10 5 Pa) is present in the cosmetic composition according to the invention, its total content ranges from 1% to 15% by weight, more preferably from 1.5% to 10% by weight, even more preferably from 2% to 8% by weight, still even more preferably from 2.1% to 6% by weight, yet more preferably from 2.2% to 5% by weight, and most preferably from 2.3% to 4% by weight relative to the total weight of the composition.

[0074] Preferably, when present in the cosmetic composition according to the invention, the total content of the hydroxylated compound v) selected from linear C2 - C8 diols is greater than or equal to 1% by weight, more preferably ranges from 1% to 15% by weight, preferably ranges from 1.5% to 10% by weight, even more preferably from 2% to 8% by weight, still even more preferably from 2.1% to 6% by weight, yet more preferably from 2.2% to 5% by weight, and most preferably from 2.3% to 4% by weight relative to the total weight of the composition.

[0075] Preferably, the total content of propylene glycol is greater than or equal to 1% by weight, more preferably ranges from 1% to 15% by weight, preferably from 1.5% to 10% by weight, even more preferably from 2% to 8% by weight, still even more preferably from 2.1% to 6% by weight, yet more preferably from 2.2% to 5% by weight, and most preferably from 2.3% to 4% by weight relative to the total weight of the composition.

[0076] vi) Solvent

[0077] The composition according to the invention may optionally contain one or more organic solvents in addition to the hydroxylated compound (v) described above.

[0078] These organic solvents are preferably selected from C1-C5 monohydric alcohols, preferably C2-C4 monohydric alcohols. Particularly preferably, ethanol is used.

[0079] Preferably, the composition contains one or more organic solvents in addition to the hydroxylated compound (v) described above, preferably one or more C2-C4 monohydric alcohols, and more preferably ethanol.

[0080] When an organic solvent in addition to the hydroxylated compound (v) is present, its total content preferably ranges from 1% to 60% by weight, preferably from 5% to 50% by weight, more preferably from 10% to 40% by weight, and even more preferably from 20% to 35% by weight, based on the total weight of the composition.

[0081] When the composition contains ethanol, the ethanol content preferably ranges from 1% to 60% by weight, preferably from 5% to 50% by weight, more preferably from 10% to 40% by weight, and even more preferably from 20% to 35% by weight, based on the total weight of the composition.

[0082] The composition is preferably aqueous, and the water content may range from 10% to 90% by weight, preferably from 20% to 80% by weight, and preferably from 40% to 70% by weight, based on the total weight of the composition.

[0083] vii) Thickening polymer

[0084] The composition according to the invention may optionally contain one or more thickening polymers.

[0085] According to the invention, the term "thickening polymer" means a compound which, at room temperature (25 °C), at atmospheric pressure and at a shear rate of 1 s -1 increases the viscosity of the composition in which it is introduced by at least 20 cps (20 mPa·s), preferably by at least 50 cps (50 mPa·s), at a concentration of 0.05% by weight (the viscosity can be measured using a cone / plate viscometer, a Haake R600 rheometer, etc.).

[0086] The thickening polymers that can be used in the method according to the invention are preferably selected from non-associative thickening polymers with sugar units, non-associative thickening polymers without sugar units, associative thickening polymers, and mixtures thereof.

[0087] For the purposes of the present invention, the term "sugar unit" means a hydrocarbyl compound containing several alcohol functional groups, with or without aldehyde or ketone functional groups, and containing at least 4 carbon atoms and oxygen.

[0088] The sugar units may optionally be modified by substitution and / or by oxidation and / or by dehydration.

[0089] The sugar units of the thickening polymers are preferably derived from the following sugars: glucose, galactose, arabinose, rhamnose, mannose, xylose, fucose, dehydrated galactose, galacturonic acid, glucuronic acid, mannuronic acid, galactose sulfate, dehydrated galactose sulfate, and fructose.

[0090] According to the present invention, polymers with sugar units are also called polysaccharides.

[0091] Non - associative thickening polymers with sugar units that may be mentioned in particular include native gums, such as:

[0092] a) Exudates from trees or shrubs, including:

[0093] - Gum arabic (a branched polymer of galactose, arabinose, rhamnose, and glucuronic acid);

[0094] - Tragacanth gum (a polymer derived from arabinose, galactose, mannose, xylose, and glucuronic acid);

[0095] - Karaya gum (a polymer derived from galacturonic acid, galactose, rhamnose, and glucuronic acid);

[0096] - Gum ghatti (a polymer of galacturonic acid, galactose, fucose, xylose, and arabinose);

[0097] b) Gums derived from algae, including:

[0098] - Agar (a polymer derived from galactose and dehydrated galactose);

[0099] - Alginates (a polymer of mannuronic acid and glucuronic acid);

[0100] - Carrageenan and furcellaran (polymers of galactose sulfate and dehydrated galactose sulfate);

[0101] c) Gums derived from seeds or tubers, including:

[0102] - Guar gum (a polymer of mannose and galactose);

[0103] - Locust bean gum (a polymer of mannose and galactose);

[0104] - Fenugreek gum (a polymer of mannose and galactose);

[0105] - Tamarind gum (a polymer of galactose, xylose and glucose);

[0106] - Konjac gum (a polymer of glucose and mannose);

[0107] d) Microbial gums, including:

[0108] - Xanthan gum (a polymer of glucose, mannose acetate, mannose / pyruvate and glucuronic acid);

[0109] - Gellan gum (a polymer of partially acylated glucose, rhamnose and glucuronic acid);

[0110] - Scleroglucan gum (a polymer of glucose);

[0111] e) Plant extracts, including:

[0112] - Cellulose (a polymer of glucose);

[0113] - Starch (a polymer of glucose); and

[0114] - Inulin.

[0115] These polymers can be physically or chemically modified. As physical treatment, temperature can be particularly mentioned.

[0116] Chemical treatments that can be mentioned include esterification, etherification, amidation or oxidation reactions. These treatments enable the production of polymers that can be, in particular, non-ionic, anionic or amphoteric.

[0117] Preferably, these chemical or physical treatments are applied to guar gum, locust bean gum, starch and cellulose.

[0118] The non-ionic guar gum that can be used according to the present invention can be modified with C1-C6 (poly)hydroxyalkyl groups.

[0119] Among the C1-C6 (poly)hydroxyalkyl groups, for example, hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl can be mentioned.

[0120] These guar gums are well known in the prior art and can be prepared, for example, by reacting the corresponding alkylene oxide, such as propylene oxide, with guar gum in order to obtain guar gum modified with hydroxypropyl groups.

[0121] The degree of hydroxyalkylation preferably ranges from 0.4 to 1.2 and corresponds to the number of alkylene oxide molecules consumed by the number of free hydroxyl functional groups present on the guar gum.

[0122] Such non-ionic guar gums optionally modified with hydroxyalkyl groups are sold, for example, by Rhodia Chimie under the trade names Jaguar HP8, Jaguar HP60 and Jaguar HP120.

[0123] The plant source of the starch molecules that can be used in the present invention can be cereals or tubers. Thus, the starch is selected from, for example, corn starch, rice starch, cassava starch, barley starch, potato starch, wheat starch, sorghum starch and pea starch.

[0124] The starch can be chemically or physically modified in particular by one or more of the following reactions: pregelatinization, oxidation, crosslinking, esterification, etherification, amidation, heat treatment.

[0125] Distarch phosphates or compounds rich in distarch phosphates are preferably used, such as products sold by Avebe under the index numbers Prejel VA-70-T AGGL (gelatinized hydroxypropyl cassava distarch phosphate), Prejel TK1 (gelatinized cassava distarch phosphate) or Prejel 200 (gelatinized acetylated cassava distarch phosphate), or Structure Zea from National Starch (gelatinized corn distarch phosphate).

[0126] According to the present invention, amphoteric starches can also be used, which contain one or more anionic groups and one or more cationic groups. The anionic and cationic groups can be bound to the same or different reaction sites of the starch molecule; they are preferably bound to the same reaction site. The anionic group can be of the carboxylate, phosphate or sulfate type, preferably of the carboxylate type. The cationic group can be of the primary, secondary, tertiary or quaternary amine type.

[0127] The starch molecule can be derived from any plant source of starch, especially such as corn, potato, oats, rice, cassava, sorghum, barley or wheat. Hydrolysis products of the above-mentioned starches can also be used. The starch is preferably derived from potato.

[0128] The non-associative thickening polymer of the present invention can be a cellulose-based polymer that does not contain C 10 -C 30 fatty chains.

[0129] According to the present invention, the term "cellulose-based polymer" refers to any polysaccharide compound having in its structure a sequence of glucose residues linked together via β-1,4 bonds; cellulose derivatives can be anionic, cationic, amphoteric or non-ionic in addition to unsubstituted cellulose.

[0130] Thus, the cellulose-based polymers that can be used according to the present invention can be selected from unsubstituted cellulose (including those in microcrystalline form), and cellulose ethers.

[0131] Among these cellulose-based polymers, cellulose ethers, cellulose esters, and cellulose ester ethers are distinguished.

[0132] Cellulose esters are inorganic esters of cellulose (cellulose nitrate, cellulose sulfate, cellulose phosphate, etc.), organic cellulose esters (monoacetate cellulose, triacetate cellulose, cellulose amide propionate, cellulose acetate butyrate, cellulose acetate propionate, or cellulose acetate trimellitate, etc.), and mixed organic / inorganic esters of cellulose such as cellulose acetate butyrate sulfate and cellulose acetate propionate sulfate. Among cellulose ester ethers, hydroxypropyl methyl cellulose phthalate and ethyl cellulose sulfate can be mentioned.

[0133] Among the nonionic cellulose ethers without a C 10 -C 30 aliphatic chain, that is, the "non-associative" cellulose ethers, (C1-C4) alkyl celluloses such as methyl cellulose and ethyl cellulose (e.g., Ethocel standard 100 Premium from Dow Chemical) can be mentioned; (poly)hydroxy(C1-C4) alkyl celluloses such as hydroxymethyl cellulose, hydroxyethyl cellulose (e.g., Natrosol 250HHR sold by Aqualon) and hydroxypropyl cellulose (e.g., Klucel EF from Aqualon); mixed (poly)hydroxy(C1-C4) alkyl(C1-C4) alkyl celluloses such as hydroxypropyl methyl cellulose (e.g., Methocel E4M from Dow Chemical), hydroxyethyl methyl cellulose, hydroxyethyl ethyl cellulose (e.g., Bermocoll E 481FQ from Akzo Nobel), and hydroxybutyl methyl cellulose.

[0134] Among the anionic cellulose ethers without a fatty chain, (poly)carboxy(C1-C4) alkyl celluloses and their salts can be mentioned. For example, carboxymethyl cellulose, carboxymethyl methyl cellulose (e.g., Blanose 7M from Aqualon), and carboxymethyl hydroxyethyl cellulose and its sodium salt can be mentioned.

[0135] Among cationic cellulose ethers without a fatty chain, cationic cellulose derivatives can be mentioned, such as cellulose copolymers or cellulose derivatives grafted with water-soluble quaternary ammonium monomers, and are particularly described in patent US 4 131 576, such as (poly)hydroxy(C1-C4)alkyl celluloses, for example, hydroxymethyl cellulose, hydroxyethyl cellulose or hydroxypropyl cellulose grafted particularly with methacryloylethyltrimethylammonium, methacrylamidopropyltrimethylammonium or dimethyldiallylammonium salts. Commercial products corresponding to this definition are more particularly those sold by National Starch under the names L 200 and H 100.

[0136] Among the non-associative thickening polymers without sugar units that can be used according to the present invention, crosslinked acrylic or methacrylic acid homopolymers or copolymers, crosslinked 2-acrylamido-2-methylpropanesulfonic acid homopolymers and their crosslinked acrylamide copolymers, ammonium acrylate homopolymers or copolymers of ammonium acrylate and acrylamide can be mentioned, either alone or as a mixture.

[0137] The first family of non-associative thickening polymers suitable for use is represented by crosslinked acrylic acid homopolymers.

[0138] Among homopolymers of this type, those crosslinked with allyl alcohol ethers of the sugar series can be mentioned, such as products sold by Noveon under the names Carbopol 980, 981, 954, 2984 and 5984 or products sold by 3VSA under the names Synthalen M and Synthalen K. These polymers have the INCI name Carbomer.

[0139] The non-associative thickening polymer can also be a crosslinked (meth)acrylic acid copolymer, such as the polymer sold by Noveon under the name Aqua SF1.

[0140] The non-associative thickening polymer can be selected from crosslinked 2-acrylamido-2-methylpropanesulfonic acid homopolymers and their crosslinked acrylamide copolymers.

[0141] Among the partially or fully neutralized crosslinked copolymers of 2-acrylamido-2-methylpropanesulfonic acid and acrylamide, the products described in Example 1 of EP 503 853 can be particularly mentioned, and reference can be made to the said document regarding these polymers.

[0142] The composition according to the present invention can similarly contain ammonium acrylate homopolymers or copolymers of ammonium acrylate and acrylamide as non-associative thickening polymers.

[0143] As an example of an ammonium acrylate homopolymer, mention may be made of the product sold by Hoechst under the name Microsap PAS 5193. Among the copolymers of ammonium acrylate and acrylamide, mention may be made of the product sold by Hoechst under the name Bozepol C Nouveau or under the name PAS 5193. For the description and preparation of such compounds, reference may be made in particular to FR 2 416 723, US 2 798 053 and US 2 923 692.

[0144] Also usable are cationic thickening polymers of the acrylic acid type.

[0145] Among the thickening polymers, mention may also be made of associative polymers well known to those skilled in the art and having in particular non-ionic, anionic, cationic or amphoteric properties (preferably anionic).

[0146] It should be understood that an "associative polymer" is a polymer capable of associating reversibly with each other or with other molecules in an aqueous medium.

[0147] Their chemical structure more particularly comprises at least one hydrophilic region and at least one hydrophobic region.

[0148] "Hydrophobic group" means a group or polymer having a saturated or unsaturated, straight-chain or branched hydrocarbon chain containing at least 10 carbon atoms, preferably 10 to 30 carbon atoms, particularly 12 to 30 carbon atoms, and more preferably 18 to 30 carbon atoms.

[0149] Preferably, the hydrocarbon group is derived from a monofunctional compound. For example, the hydrophobic group may be derived from a fatty alcohol such as stearyl alcohol, dodecyl alcohol or decyl alcohol. It may also denote a hydrocarbon polymer, such as polybutadiene.

[0150] Among the associative polymers of the anionic type, mention may be made of:

[0151] -(a) those comprising at least one hydrophilic unit and at least one fatty chain allyl ether unit, more particularly those whose hydrophilic unit is constituted by an ethylenically unsaturated anionic monomer, even more particularly by a vinyl carboxylic acid and most particularly by acrylic acid or methacrylic acid or a mixture thereof.

[0152] Among these anion - associating polymers, those which are particularly preferred according to the invention are polymers formed from 20% to 60% by weight of acrylic acid and / or methacrylic acid, 5% to 60% by weight of lower alkyl (meth)acrylates, 2% to 50% by weight of aliphatic allyl ethers, and 0% to 1% by weight of a cross - linker, which is a well - known copolymerizable unsaturated polyene monomer such as diallyl phthalate, allyl (meth)acrylate, divinylbenzene, (poly)ethylene glycol dimethacrylate or methylene bisacrylamide.

[0153] Among the latter polymers, those which are most particularly preferred are cross - linked terpolymers of methacrylic acid, ethyl acrylate and polyethylene glycol (10 EO) stearyl ether (steareth - 10), in particular those sold by Ciba under the names Salcare SC and Salcare SC which are 30% aqueous emulsions of a cross - linked terpolymer of methacrylic acid, ethyl acrylate and allyl ether of steareth - 10 (40 / 50 / 10);

[0154] -(b) Those comprising i) at least one hydrophilic unit of the unsaturated olefinic carboxylic acid type and ii) at least one hydrophobic unit of the type such as (C 10 -C 30 ) alkyl esters of unsaturated carboxylic acids, etc.

[0155] The (C 10 -C 30 ) alkyl esters of unsaturated carboxylic acids which can be used in the present invention include, for example, lauryl acrylate, stearyl acrylate, decyl acrylate, isodecyl acrylate and dodecyl acrylate, and the corresponding methacrylates, lauryl methacrylate, stearyl methacrylate, decyl methacrylate, isodecyl methacrylate and dodecyl methacrylate.

[0156] For example, this type of anionic polymer is described and prepared according to patents US 3 915 921 and US 4 509 949.

[0157] Among this type of anion - associating polymer, those formed from 60% to 95% by weight of acrylic acid (hydrophilic unit), 4% to 40% by weight of acrylic C 10 -C 30 alkyl esters (hydrophobic unit), and 0% to 6% by weight of polymerizable cross - linking monomer will be used more particularly, or alternatively those formed from 96% to 98% by weight of acrylic acid (hydrophilic unit), 1% to 4% by weight of acrylic C 10 -C 30Those consisting of an alkyl ester (hydrophobic unit), and 0.1% to 0.6% by weight of a polymerizable crosslinking monomer, such as those described previously.

[0158] Among the polymers described above, the most particularly preferred polymers according to the invention are those sold by Goodrich under the trade name Pemulen Pemulen Carbopol and even more preferably Pemulen products, and those sold by SEPPIC under the name Coatex products.

[0159] Also mentionable is the acrylic acid / lauryl methacrylate / vinylpyrrolidone terpolymer sold by ISP under the name Acrylidone LM.

[0160] -(c) Maleic anhydride / C 30 -C 38 α-olefin / maleic acid alkyl ester terpolymers, such as those sold by Newphase Technologies under the name Performa V products (maleic anhydride / C 30 -C 38 α-olefin / isopropyl maleate copolymer).

[0161] -(d) Acrylic acid terpolymers, comprising:

[0162] i) Approximately 20% to 70% by weight of an α,β-monoethylenically unsaturated carboxylic acid [A],

[0163] ii) Approximately 20% to 80% by weight of an α,β-monoethylenically unsaturated non-surfactant monomer other than [A],

[0164] iii) Approximately 0.5% to 60% by weight of a nonionic mono-carbamate, which is the reaction product of a mono-surfactant and a monoethylenically unsaturated monoisocyanate,

[0165] such as those described in patent application EP-A-0 173 109, and more particularly the terpolymer described in Example 3, namely the methacrylic acid / methyl acrylate / behenyl dimethyl-m-isopropenylbenzyl isocyanate ethoxylated (40EO) terpolymer, as a 25% aqueous dispersion.

[0166] -(e) Copolymers containing, among their monomers, α,β-monoethylenically unsaturated carboxylic acids and esters of α,β-monoethylenically unsaturated carboxylic acids with oxyalkylene-substituted fatty alcohols.

[0167] Preferably, these compounds also contain, as monomers, esters of α,β-monoethylenically unsaturated carboxylic acids and C1-C4 alcohols.

[0168] Examples of compounds of this type that may be mentioned are Aculyn & Haas) sold by Rohm and Haas Company which is a terpolymer of methacrylic acid / ethyl acrylate / stearyl methacrylate with oxyalkylene; and also Aculyn 88, also sold by Rohm and Haas Company. Mention may also be made of the Novethix L-10 polymer sold by Lubrizol, which has the INCI name acrylate / behenyl ether-25 methacrylate copolymer.

[0169] -(f) Amphiphilic polymers containing at least one ethylenically unsaturated monomer with a sulfonic acid group in free or partially or fully neutralized form and containing at least one hydrophobic moiety. These polymers may be crosslinked or non-crosslinked. They are preferably crosslinked.

[0170] Ethylenically unsaturated monomers with a sulfonic acid group are particularly selected from vinyl sulfonic acid, styrene sulfonic acid, (meth)acrylamido(C1-C 22 )alkyl sulfonic acid, N-(C1-C 22 )alkyl(meth)acrylamido(C1-C 22 )alkyl sulfonic acid such as undecylacrylamidomethane sulfonic acid and also their partially or fully neutralized forms.

[0171] More preferably, (meth)acrylamido(C1-C 22 )alkyl sulfonic acids will be used, such as acrylamidomethane sulfonic acid, acrylamidoethane sulfonic acid, acrylamidopropane sulfonic acid, 2-acrylamido-2-methylpropane sulfonic acid, methacrylamido-2-methylpropane sulfonic acid, 2-acrylamido-n-butane sulfonic acid, 2-acrylamido-2,4,4-trimethylpentane sulfonic acid, 2-methacrylamidododecyl sulfonic acid or 2-acrylamido-2,6-dimethyl-3-heptane sulfonic acid and also their partially or fully neutralized forms.

[0172] More particularly, 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and also its partially or fully neutralized forms are used.

[0173] Polymers of this family may in particular be selected from those obtained by copolymerization with C6-C 22Random amphiphilic AMPS polymers modified by reaction with a primary monoalkylamine or a secondary dialkylamine, and those as described in patent application WO 00 / 31154 (which form part of the description). These polymers may also contain other ethylenically unsaturated hydrophilic monomers selected, for example, from (meth)acrylic acid, its β-substituted alkyl derivatives or its esters obtained with a monoalcohol or a mono- or polyalkylene glycol, (meth)acrylamide, vinylpyrrolidone, maleic anhydride, itaconic acid or maleic acid, or mixtures of these compounds.

[0174] Preferred polymers of this family are selected from amphiphilic copolymers of AMPS and at least one ethylenically unsaturated hydrophobic monomer.

[0175] These same copolymers may also contain one or more ethylenically unsaturated monomers not containing a fatty chain, such as (meth)acrylic acid, its β-substituted alkyl derivatives or its esters obtained with a monoalcohol or a mono- or polyalkylene glycol, (meth)acrylamide, vinylpyrrolidone, maleic anhydride, itaconic acid or maleic acid or mixtures of these compounds.

[0176] These copolymers are described in particular in patent application EP-A 750 899, patent US 5 089 578 and the following publications by Yotaro Morishima:

[0177] -Self-assembling amphiphilic polyelectrolytes and their nanostructures, Chinese Journal of Polymer Science, Vol. 18, No. 40, (2000), 323-336;

[0178] -Micelle formation of random copolymers of sodium 2-(acrylamido)-2-methylpropanesulfonate and a nonionic surfactant macromonomer in water as studied by fluorescence and dynamic light scattering, Macromolecules, Vol. 33, No. 10, (2000), 3694-3704;

[0179] -Solution properties of micelle networks formed by non-ionic moieties covalently bound to an polyelectrolyte: salt effects on rheological behavior - Langmuir, Vol. 16, No. 12, (2000) 5324-5332;

[0180] -Stimuli responsive amphiphilic copolymers of sodium 2-(acrylamido)-2-methylpropanesulfonate and associative macromonomers, Polym. Preprint, Div. Polym. Chem. 40(2), (1999), 220-221.

[0181] Among these polymers, mention may be made of:

[0182] - a crosslinked or non-crosslinked, neutralized or unneutralized copolymer comprising from 15% to 60% by weight of AMPS units and from 40% to 85% by weight of (C8-C 16 ) alkyl (meth) acrylamide or (meth) acrylic acid (C8-C 16 ) alkyl ester units, such as those described in patent application EP-A 750 899;

[0183] - a terpolymer comprising 10 mol % to 90 mol % of acrylamide units, 0.1 mol % to 10 mol % of AMPS units and 5 mol % to 80 mol % of normal-(C6-C 18 ) alkylacrylamide units, such as those described in patent US-5,089,578.

[0184] Mention may also be made of completely neutralized copolymers of AMPS and dodecyl methacrylate, and also crosslinked and non-crosslinked copolymers of AMPS and n-dodecylmethacrylamide, such as those described in the abovementioned Morishima article.

[0185] Among cationic associative polymers, mention may be made of:

[0186] (a) Cationic associative polyurethanes;

[0187] (b) A compound sold by Noveon under the name Aqua CC and corresponding to the INCI name Polyacrylate-1 Crosspolymer.

[0188] Polyacrylate-1 Crosspolymer is the polymerization product of a monomer mixture comprising:

[0189] - Di(C1-C4 alkyl)amino(C1-C6 alkyl) methacrylate,

[0190] - One or more C1-C 30 alkyl esters of (meth)acrylic acid,

[0191] - Polyethoxylated C 10 - C 30 alkyl methacrylate (20 - 25 mol of ethyleneoxy units),

[0192] - 30 / 5 polyethylene glycol / polypropylene glycol allyl ether,

[0193] - Hydroxy(C2-C6 alkyl) methacrylate, and

[0194] - Ethylene glycol dimethacrylate.

[0195] (c) Quaternized (poly)hydroxyethyl cellulose modified with a group containing at least one fatty chain, such as an alkyl, aralkyl or alkaryl group containing at least 8 carbon atoms or a mixture thereof. The alkyl carried by the above quaternized cellulose or hydroxyethyl cellulose preferably contains 8 to 30 carbon atoms. Aryl preferably denotes phenyl, benzyl, naphthyl or anthryl. Examples of quaternized alkyl hydroxyethyl celluloses containing C8-C 30 fatty chains include products sold by Aqualon such as Quatrisoft LM Quatrisoft LM-X Quatrisoft LM-X (C 12 alkyl) and Quatrisoft LM-X (C 18 alkyl) and products sold by Croda such as Crodacel Crodacel (C 12 alkyl) and Crodacel (C 18(alkyl) and the product Softcat SL sold by Crosfield

[0196] (d) Cationic polyvinyl lactam polymers.

[0197] Such polymers are described, for example, in patent application WO-00 / 68282.

[0198] As the poly(vinyl lactam) polymer according to the invention, a vinylpyrrolidone / dimethylaminopropyl methacrylamide / ammonium lauryl dimethyl methacrylamidopropyl tosylate terpolymer, a vinylpyrrolidone / dimethylaminopropyl methacrylamide / ammonium cocoyl dimethyl methacrylamidopropyl tosylate terpolymer, a vinylpyrrolidone / dimethylaminopropyl methacrylamide / ammonium lauryl dimethyl methacrylamidopropyl tosylate or chloride terpolymer is particularly used.

[0199] The amphoteric associative polymers are preferably selected from those containing at least one non-cyclic cationic unit. Even more particularly, those prepared from or containing 1 to 20 mol%, preferably 1.5 to 15 mol% and even more particularly 1.5 to 6 mol% of a fatty chain monomer relative to the total molar amount of the monomers are preferred.

[0200] For example, the amphoteric associative polymers according to the invention are described and prepared in patent application WO 98 / 44012.

[0201] Among the amphoteric associative polymers according to the invention, an acrylic acid / (meth)acrylamidopropyl trimethylammonium chloride / stearyl methacrylate terpolymer is preferred.

[0202] The associative polymers of the nonionic type that can be used according to the invention are preferably selected from:

[0203] (a) Copolymers of vinylpyrrolidone and fatty chain hydrophobic monomers, among which, by way of example, may be mentioned:

[0204] - The product Antaron sold by ISP or Ganex (vinylpyrrolidone / hexadecene copolymer);

[0205] - The product Antaron sold by ISP or Ganex (vinylpyrrolidone / eicosene copolymer);

[0206] (b) Copolymers of methacrylic acid or acrylic acid C1-C6 alkyl esters and zwitterionic monomers containing at least one fatty chain, such as the oxyethylated methyl acrylate / stearyl acrylate copolymer sold by Goldschmidt under the name Antil ;

[0207] (c) Copolymers of hydrophilic methacrylates or acrylates and hydrophobic monomers containing at least one fatty chain, such as polyethylene glycol methacrylate / lauryl methacrylate copolymer.

[0208] (d) Polyurethane polyethers that include both hydrophilic blocks (usually of polyoxyethylated nature) and hydrophobic blocks (which can be separate aliphatic sequences and / or cycloaliphatic and / or aromatic sequences) in their chains;

[0209] (e) Polymers having an aminoplast ether backbone containing at least one fatty chain, such as the Pure compounds sold by Sud-Chemie;

[0210] (f) Cellulose or its derivatives modified with groups containing at least one fatty chain (such as alkyl, aralkyl, or alkaryl or mixtures thereof), where the alkyl is C8, and in particular:

[0211] * Non-ionic alkyl hydroxyethyl cellulose, such as the products Natrosol Plus Grade330CS and Polysurf 67 (C 16 alkyl) sold by Aqualon;

[0212] * Non-ionic nonylphenol polyether-based hydroxyethyl cellulose, such as the product Amercell HM-1500 sold by Amerchol;

[0213] * Non-ionic alkyl cellulose, such as the product Bermocoll EHM 100 sold by Berol Nobel;

[0214] (g) Associative guar gum derivatives, such as hydroxypropyl guar gum modified with a fatty chain, such as the product Esaflor HM 22 (modified with a C 22 alkyl chain) sold by Lamberti; the product Miracare XC 95-3 (modified with a C 14 alkyl chain) and the product RE 205-146 (modified with a C 20 alkyl chain) sold by Rhodia Chimie.

[0215] Preferably, the polyurethane polyether comprises at least two hydrocarbon-based lipophilic chains containing 6 to 30 carbon atoms and separated by hydrophilic blocks, which hydrocarbon chains may be side chains or chains at the ends of the hydrophilic blocks. In particular, one or more side chains may be envisaged. In addition, the polymer may comprise hydrocarbon chains at one or both ends of the hydrophilic block.

[0216] The polyurethane polyether may be multi-block, especially in the form of triblocks. The hydrophobic blocks may be at each end of the chain (e.g., triblock copolymer with a hydrophilic central block) or distributed at the ends and in the chain (e.g., multi-block copolymer). These polymers may also be graft polymers or star polymers.

[0217] The aliphatic chain non-ionic polyurethane polyether may be a triblock copolymer, the hydrophilic block of which is a polyoxyethylenated chain containing 50 to 1000 oxyethylene groups. The non-ionic polyurethane polyether contains urethane bonds between the hydrophilic blocks, whence the name.

[0218] By extension, the aliphatic chain non-ionic polyurethane polyether also includes those in which the hydrophilic block is linked to the lipophilic block via other chemical bonds.

[0219] As an example of a non-ionic aliphatic chain polyurethane polyether that can be used in the present invention, mention may also be made of Rheolate with urea functionality sold by Rheox or 208, 204 or 212, and also Acrysol RM

[0220] Mention may also be made of products from Akzo with C 12 -C 14 alkyl chains, Elfacos and products from Akzo with C 18 alkyl chains, Elfacos

[0221] Products from Rohm & Haas &Haas) with C 20 alkyl chains and urethane bonds, product DW provided at a solids content of 20% in water

[0222] Solutions or dispersions of these polymers may also be used, especially in water or in a water / alcohol medium. Examples of such polymers that may be mentioned include those sold by Rheox 255, 278 and 244. Products DW 1206F and DW 1206J sold by Rohm and Haas can also be used.

[0223] The polyurethane polyethers that can be used according to the present invention are in particular those described in the article by G. Fonnum, J. Bakke and Fk. Hansen - Colloid Polym. Sci. [Colloid Polymer Science], 271, 380 - 389 (1993).

[0224] Even more particularly preferably, a polyurethane polyether obtained by polycondensation of at least three compounds is used, the at least three compounds comprising (i) at least one polyethylene glycol containing 150 to 180 mol of ethyloxy groups, (ii) stearyl alcohol or decyl alcohol, and (iii) at least one diisocyanate.

[0225] Such polyurethane polyethers are in particular sold by Rohm and Haas under the names Aculyn and Aculyn for sale [Aculyn is a condensate of polyethylene glycol containing 150 or 180 mol of ethyloxy groups, stearyl alcohol and methylene bis(4 - cyclohexyl isocyanate) (SMDI), at 15% by weight in a matrix of maltodextrin (4%) and water (81%); Aculyn is a condensate of polyethylene glycol containing 150 or 180 mol of ethyloxy groups, decyl alcohol and methylene bis(4 - cyclohexyl isocyanate) (SMDI), at 35% by weight in a mixture of propylene glycol (39%) and water (26)].

[0226] Preferably, the composition comprises one or more thickening polymers, which are preferably selected from non - associative thickening polymers without sugar units, anionic associative thickening polymers (in particular anionic associative acrylic polymers), and mixtures thereof.

[0227] Preferably, when the thickening polymer is present in the composition according to the present invention, the total content of the thickening polymer is in the range of from 0.05% to 4% by weight, more preferably from 0.1% to 2% by weight, even more preferably from 0.2% to 1% by weight, and still better from 0.3% to 0.8% by weight relative to the total weight of the composition.

[0228] Additive

[0229] The composition may also optionally contain one or more additives other than the compounds described previously, such as those selected from: cations, anions, amphoteric or zwitterionic, nonionic surfactants and mixtures thereof, cationic, anionic, nonionic, amphoteric polymers or mixtures thereof, antidandruff agents, antiseborrheic agents, vitamins and provitamins (including panthenol), sunscreens, chelating agents, plasticizers, solubilizers, acidifying agents, opacifiers or pearlescing agents, antioxidants, hydroxy acids, fragrances, preservatives and ceramides.

[0230] Needless to say, the person skilled in the art will carefully select such or these optional additional compounds such that the advantageous properties inherently associated with the composition according to the invention are not or are not substantially adversely affected by the envisaged additives.

[0231] The amount of each of the above additives present may generally be between 0% and 20% by weight relative to the total weight of the composition.

[0232] Method

[0233] The invention also relates to a method for the cosmetic treatment of human keratin materials, such as the skin, in particular the human scalp, hair and / or eyelashes, which method comprises at least the application of a cosmetic composition as defined previously.

[0234] The composition according to the invention is preferably applied topically, in particular to the scalp and / or the hair.

[0235] After application of the composition, rinsing may or may not be carried out after a possible dwell time.

[0236] Preferably, no rinsing is carried out after application of the composition according to the invention.

[0237] Preferably, the cosmetic treatment method is a method for caring for the hair and / or the scalp.

[0238] The subject of the invention is also the use of a cosmetic composition as defined previously for treating the loss of keratin fibers and / or for promoting the regeneration of keratin fibers and / or for treating dandruff in a cosmetic manner.

[0239] The subject of the invention is also the use of a cosmetic composition as defined previously for increasing the diameter of keratin fibers and / or for strengthening keratin fibers against breakage. Detailed Description

[0240] The following examples are used to illustrate the invention, but are not restrictive in nature.

[0241] Examples

[0242] In the following examples, all amounts are given as mass percentages of the active material (AM) relative to the total weight of the composition (unless otherwise indicated).

[0243] a) Composition

[0244] Compositions A (according to the invention) and A' (comparative) were prepared using the following ingredients, the amounts of which are indicated in the table below (% A.M.):

[0245] [Table 1]

[0246]

[0247]

[0248] b) Scheme

[0249] Locks (HT4 type 2) of 2.7 g (27 cm) of natural Caucasian hair were first washed with DOP shampoo (1.5 g shampoo / lock).

[0250] The lock was then wetted 10 times between two fingers under the tap and then squeezed dry twice between two fingers, then combed with a wide-tooth comb (twice) and then with a fine-tooth comb (twice).

[0251] Compositions A (according to the invention) and A' (comparative) were then applied by hand at a rate of 0.4 g / 2.7 g lock and spread over the entire lock. The lock was then combed with a fine-tooth comb (once) and smoothed by hand, and then air-dried at room temperature.

[0252] The tackiness of the lock and the individuation of the fibres in the lock were then evaluated.

[0253] Compositions A and A' were then reapplied to the dry hair twice, without rinsing between successive applications, and the lock was dried between each application.

[0254] The gloss of the lock was then evaluated.

[0255] c) Result

[0256] After the first application to the wet hair, three experts evaluated the tackiness of the treated locks, as well as the individuation and gloss of the fibres in each lock, under blind conditions:

[0257] - Tackiness: The experts placed two fingers on the lock and pressed at different positions, noting whether the fibres stuck to the fingers.

[0258] - Individualization of the fibers: The expert lifts a lock at 90° relative to the horizontal plane and then gently slides the hand to the end so that the hair strands gradually fall back one by one, three times. The more they separate from each other as they fall back, the better their individualization.

[0259] - Gloss: The gloss is evaluated visually. The expert slides a lock laid flat between the index finger and the middle finger from the root to the end and evaluates the light reflection at the bend of the hair on the finger. The more light the hair reflects, the glossier it is.

[0260] The locks treated with composition A' (comparison) are stickier than the locks treated with composition A according to the invention.

[0261] Moreover, the fibers of the locks treated with composition A (according to the invention) are more individualized than the fibers of the locks treated with composition A' (comparison), and the locks treated with composition A' have bundled fibers.

[0262] After two additional applications to dry hair, three experts evaluated the gloss of the locks.

[0263] The locks treated with composition A (according to the invention) are glossier than the locks treated with composition A' (comparison).

Claims

1. A cosmetic composition, the cosmetic composition comprising: i) piroctone olamine, ii) niacinamide in an amount of at least 1% by weight, based on the total weight of the composition, and iii) ginger root extract.

2. The composition according to claim 1, wherein The total content of piroctone olamine ranges from 0.05% to 2% by weight, preferably from 0.1% to 1% by weight and preferably from 0.1% to 0.5% by weight, based on the total weight of the composition.

3. The composition according to any one of the preceding claims, characterized in that, The total content of niacinamide ranges from 1% to 5% by weight, preferably from 1.5% to 4.5% by weight and preferably from 2% to 4% by weight, based on the total weight of the composition.

4. The composition according to any one of the preceding claims, characterized in that, The total content of ginger root extract ranges from 0.02% to 0.5% by weight, preferably from 0.03% to 0.3% by weight and preferably from 0.05% to 0.2% by weight, based on the total weight of the composition.

5. The composition according to any one of the preceding claims, characterized in that, The composition further comprises 2,4-diaminopyrimidine 3-N-oxide and / or its organic or inorganic salts and / or its hydrates.

6. The composition according to the previous claim, characterized in that, The total content of 2,4-diaminopyrimidine 3-N-oxide and / or its organic or inorganic salts and / or its hydrates ranges from 0.05% to 8% by weight, preferably from 0.1% to 5% by weight, more preferably from 0.2% to 4% by weight, even more preferably from 0.5% to 3% by weight and still more preferably from 1% to 2% by weight, based on the total weight of the composition.

7. The composition according to any one of the preceding claims, characterized in that, The composition further comprises one or more hydroxylated compounds having a melting point below 25 °C and a boiling point greater than or equal to 170 °C at atmospheric pressure (1.013×10 5 Pa), the hydroxylated compound being preferably selected from straight-chain C2-C8, more preferably C2-C6 diols or aromatic C6-C8, more preferably C7-C8 monohydric alcohols and mixtures thereof, more preferably selected from straight-chain C2-C8, more preferably C2-C6 diols, even more preferably selected from propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, 1,3-propanediol, benzyl alcohol, phenethyl alcohol (phenylethyl alcohol) and dipropylene glycol, and more preferably the hydroxylated compound is propylene glycol.

8. The composition according to the preceding claim, characterized in that, The total content of the hydroxylated compound having a melting point below 25 °C and a boiling point temperature of 170 °C or higher at atmospheric pressure (1.013×10 5 Pa) is greater than or equal to 1% by weight, preferably greater than or equal to 1.5% by weight, more preferably 1% to 15% by weight, more preferably 1.5% to 10% by weight, even more preferably 2% to 8% by weight, still better 2.1% to 6% by weight, even still better 2.2% to 5% by weight, or even 2.3% to 4% by weight, relative to the total weight of the composition.

9. The composition according to any one of the preceding claims, characterized in that, The composition further comprises one or more organic solvents other than the hydroxylated compounds having a melting point below 25 °C and a boiling point greater than or equal to 170 °C at atmospheric pressure (1.013×10 5 Pa), and the organic solvent is preferably selected from C1-C5 monohydric alcohols, preferably C2-C4 monohydric alcohols, and more preferably ethanol.

10. The composition according to any one of the preceding claims, characterized in that, The composition further comprises one or more thickening polymers, which are preferably selected from non-associative thickening polymers without sugar units, anionic associative thickening polymers, in particular anionic associative acrylic polymers, and mixtures thereof.

11. A cosmetic method for treating human keratin materials, such as the skin, in particular the human scalp, hair and / or eyelashes, the cosmetic method comprising applying the composition as described in any one of the preceding claims to the keratin materials.

12. Use of the composition as described in any one of claims 1 to 10 for treating the loss of keratin fibers and / or promoting the regeneration of keratin fibers and / or for treating dandruff in a cosmetic manner.

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