CONCENTRATED COSMETIC COMPOSITION TO BE DILUTED

Abstract

CONCENTRATED COSMETIC COMPOSITION FOR DILUTING The present invention relates to a concentrated, liquid, and homogeneous cosmetic composition for dilution in a predetermined volume of water. The invention also relates to a ready-to-use cosmetic composition, in particular obtained by diluting the concentrated cosmetic composition according to the invention in water, as well as a method for preparing a ready-to-use cosmetic composition according to the invention and its use as a suitable cosmetic composition, in particular, for cleansing keratin fibers.

Description

Title of the invention: CONCENTRATED COSMETIC COMPOSITION TO BE DILUTED FIELD OF INVENTION

[0001] The present invention relates to a concentrated liquid and homogeneous cosmetic composition, to be diluted in a predefined volume of water.

[0002] The invention also relates to a ready-to-use cosmetic composition, in particular obtained by diluting the concentrated cosmetic composition according to the invention in water, as well as a method for preparing a ready-to-use cosmetic composition according to the invention and its use as a suitable cosmetic composition, in particular, for cleaning keratin fibers. PRIOR TECHNOLOGY

[0003] In recent years, consumers have had a better understanding and awareness of the cosmetic products they use, and the naturalness or ecological impact of products has become particularly important criteria.

[0004] In 2016, French production of plastic packaging amounted to 2.2 million tonnes, of which 1.2 million tonnes were household plastic packaging. At the current rate, it is estimated that by 2050, the global production and incineration of plastic, packaging or otherwise, could emit 2.8 billion tonnes of CO2 per year. In order to reduce the impact of plastic pollution on nature on the one hand and greenhouse gas emissions on the other, it is necessary to move away from the single-use plastic packaging model and identify alternatives with a lower environmental impact.

[0005] Thus, alternatives such as the use of biodegradable plastics, materials that can be recycled after consumption or reusable packaging have emerged in recent years.

[0006] The majority of cosmetic and household products are composed of approximately 80% water, in which a very small amount of active ingredient is mixed. Therefore, an alternative to reducing the amount of plastic per package compared to an equivalent standard product would be to eliminate the water from the products and retain only the active raw materials. Indeed, concentrated or refillable products, being lighter and less bulky, not only reduce the amount of plastic but also decrease the overall carbon footprint over the product's entire life cycle, thus meeting new consumer expectations.

[0007] For example, concentrated products in the field of detergents are known such as Unlike laundry detergents or dishwashing liquids, they are less common in the hygiene products sector. We are familiar with concentrated products that are ready to use directly, or those that need to be diluted to create a ready-to-use product.

[0008] However, the use of ready-to-use concentrated products such as concentrated shower gels or shampoos requires enhanced consumer education to encourage them not to use the same doses as for non-concentrated products. Therefore, concentrated formulas that are diluted in a predetermined volume of water are preferable, allowing for the reconstitution of a ready-to-use hygiene product.

[0009] For example, application WO01 / 40431 is known, relating to a concentrated formula to be diluted for reconstituting a hand wash product, comprising a mixture of a surfactant, a thickening agent, a salt, and a humectant. However, in the concentrate according to application WO01 / 40431, sufficient water must be used to keep the concentrate in solution and maintain the viscosity below 200 cps; it is specifically mentioned that a water content of less than 35% would render the formula unstable.

[0010] Thus, there is a need for a cosmetic composition concentrated in surfactants, containing a minimum of water, so as to drastically reduce the carbon impact of the cosmetic product and which, once diluted in a predefined volume of water, stored in a reusable container, leads to a ready-to-use cosmetic composition suitable, in particular, for the cleaning of keratin fibers such as the skin of the face and / or body and / or hair.

[0011] The present invention therefore aims to provide a concentrated, liquid and homogeneous cosmetic composition, to be diluted in a predefined volume of water, comprising at least one surfactant; at least one preservative; optionally, at least one thickening agent; and a cosmetically acceptable solvent.

[0012] Advantageously, when at least one thickening agent is present in the concentrated cosmetic composition, then the composition comprises less than 30% water by weight relative to the total weight of the composition, without alteration of stability.

[0013] Another advantage is that the concentrated cosmetic composition according to the present invention allows, after dilution in a predefined volume of water, the reconstitution of a ready-to-use cosmetic composition, i.e., not requiring the addition of ingredients other than the volume of water necessary to dilute the concentrated cosmetic composition, in the form of a gel or an aqueous fluid, suitable for cleaning keratin fibers such as skin and hair.

[0014] Yet another advantage is that the ready-to-use cosmetic composition obtained by diluting the concentrated cosmetic composition according to the present invention, presents similar performance to an equivalent standard product, in terms of quality, foam height and stability, the performance not being affected regardless of the quality of the water used to dilute the concentrated cosmetic composition.

[0015] Yet another advantage is that the ready-to-use cosmetic composition according to the invention can be stored and used just like a conventional cosmetic product with a use-by date of more than one month, preferably more than 24 months.

[0016] SUMMARY

[0017] The invention relates to a concentrated, liquid, homogeneous cosmetic composition, to be diluted, comprising: - from 5% to 80% of at least one surfactant; - from 0.1% to 30% of at least one preservative agent; - from 0.0% to 30% of at least one phase thickening and / or gelling agent aqueous; and - from 10% to 60% of a cosmetically acceptable solvent selected from water or a mixture of water and at least one water-soluble organic solvent,

[0018] wherein, when at least one aqueous-phase thickening and / or gelling agent is present, then said composition comprises less than 30% water by weight relative to the total weight of the composition, and

[0019] wherein, when said composition does not comprise at least one aqueous phase thickening and / or gelling agent, then said composition comprises less than 60% water by weight relative to the total weight of the composition.

[0020] the percentages being expressed in weight relative to the total weight of the composition.

[0021] According to one embodiment, said at least one surfactant is chosen from anionic surfactants, non-ionic surfactants, amphoteric surfactants, cationic surfactants or a mixture thereof.

[0022] According to one embodiment, said at least one preservative agent is chosen from organic acids or one of their salts; glycol ethers; halogenated preservatives; aldehydes; alcohols; cationic agents; essential oils; natural or synthetic antioxidants; organic or inorganic UV filters; or a mixture thereof.

[0023] According to one embodiment, said at least one water-soluble organic solvent is selected from monoalcohols and polyols such as ethyl alcohol, isopropyl alcohol, propyl alcohol, benzyl alcohol, phenylethyl alcohol, glycerin; glycols or glycol ethers such as monomethyl, monoethyl and monobutyl ethers of ethylene glycol, propylene glycol or its ethers such as monomethyl ether of propylene glycol, butylene glycol, hexylene glycol, dipropylene glycol, and alkyl ethers of diethylene glycol such as diethylene glycol monoethyl ether or diethylene glycol monobutyl ether; or a mixture thereof.

[0024] According to one embodiment, said at least one aqueous phase thickening and / or gelling agent is selected from polyethylene glycols such as glycerol fatty acid polyesters or ethoxylated polyglycerols or ethoxylated monosaccharide fatty acid polyesters; or a mixture thereof.

[0025] According to one embodiment, the composition according to the present invention comprises: - from 5% to 80% of at least one surfactant; - from 0.1% to 30% of at least one preservative agent; - from 0.1% to 30% of at least a thickening and / or gelling agent of the phase aqueous; and - 10% to 60% of a mixture of water and at least one water-soluble organic solvent,

[0026] in which the composition comprises less than 30% water by weight relative to the total weight of the composition;

[0027] the percentages being expressed in weight relative to the total weight of the composition.

[0028] According to one embodiment, the composition according to the present invention has a viscosity of less than 1300 mPa.s.

[0029] The invention also relates to a ready-to-use cosmetic composition, comprising a concentrated cosmetic composition according to the invention and water in a ratio of the concentrated cosmetic composition to the water ranging from 1:2 to 1:20, preferably from 1:2 to 1:15.

[0030] According to one embodiment, when the concentrated cosmetic composition includes an aqueous phase thickening and / or gelling agent, then the ready-to-use composition has a viscosity greater than 1300 mPas.s and when the concentrated cosmetic composition does not include an aqueous phase thickening and / or gelling agent, then the ready-to-use composition has a viscosity less than 1300 mPas.s.

[0031] According to one embodiment, the concentrated cosmetic composition and ready-to-use cosmetic composition according to the invention exhibit a stability of more than one month, preferably more than twelve months, more preferably more than twenty-four months.

[0032] The invention further relates to a method of preparing a ready-to-use cosmetic composition according to the invention, comprising a step of diluting the concentrated cosmetic composition according to the invention in a predefined volume of water, and a step of stirring the resulting mixture.

[0033] In one embodiment, the dilution is carried out in a suitable container such as that a pot, a bottle, a vial or a flask, at a temperature ranging from 15°C to 40°C, preferably from 17°C to 30°C and the step of stirring the resulting mixture consists of a simple manual shaking of said container, carried out by a user for a time of less than two minutes, preferably less than one minute.

[0034] These embodiments are advantageous because they allow a ready-to-use cosmetic composition to be obtained by a very low energy consumption process, i.e. by cold dilution and minimal agitation by the user.

[0035] The invention further relates to the use of the concentrated cosmetic composition according to the invention as a cosmetic composition, in particular, suitable for cleaning keratin fibers such as the skin of the body and / or face and / or hair.

[0036] The present invention further relates to a kit for preparing a ready-to-use cosmetic composition according to the invention, comprising a first container, comprising a concentrated cosmetic composition according to the invention and a second container intended to receive a volume of water necessary for the dilution of the concentrated cosmetic composition.

[0037] DEFINITIONS

[0038] In the present invention, the terms below are defined as follows:

[0039] The term "include" and its variations are to be understood in the present invention as not excluding the presence of other steps and / or components. In certain embodiments, the term "include" may be interpreted as "essentially consisting of".

[0040] The term "fluid" or "liquid" refers to a system that is neither solid nor thick, having the property of flowing easily. For the purposes of this invention, a "fluid" or "liquid" has a viscosity of less than 1300 mPa.s.

[0041] The term "gel" refers to a homogeneous, isotropic, rigid, vibrating, and elastic medium. A gel is a three-dimensional network of solids dissolved in a fluid that exhibits no flow when in a stable state. By mass, gels are primarily composed of liquid, but their behavior is similar to that of solids due to their three-dimensional network entangled within the liquid. These entanglements give gels their structure and contribute to their adhesion. For the purposes of this invention, a gel has a viscosity greater than 1300 mPa·s.

[0042] The terms "aqueous phase gelling agent" and "aqueous phase thickening agent" refer to ingredients capable of modifying the rheology and / or increasing the viscosity of a liquid aqueous composition. "Aqueous phase gelling agents" and / or "aqueous phase thickeners" are of terrestrial (carob), marine (alginate), animal (gelatin), biofermentative (xanthan gum), mineral (silica, salts), or synthetic (carbomer) origin, and all confer certain characteristics. Specific sensory terotics can be combined by associating them in the composition. Thickening agents can also include, but are not limited to, any combination of raw materials that increases the viscosity of the aqueous system, such as combinations of surfactants. Examples of such surfactant combinations include isethionate, alkyl betaine, alkyl polyglucoside, and alkanolamide surfactants.

[0043] The term "surfactant" in the context of the present invention refers to water-soluble substances that have the property of adhering to the interfaces between water and oils and thus promoting the foaming and / or detergent effect of hygiene products such as shower gels, soaps, shampoos, or micellar waters. For the purposes of this invention, the surfactant is selected from anionic surfactants, cationic surfactants, amphoteric surfactants, zwitterionic surfactants, or nonionic surfactants.

[0044] The term “preservative” refers to any substance capable of resisting alterations of physical origin, such as photodegradation, also known as UV filters; chemical origin, such as transformation by redox reaction with air, a component, or a container, also known as an antioxidant; or microbiological origin, such as alteration by bacteria and fungi, also known as antimicrobial agents. For the purposes of this invention, the preservative may be chosen from among the preservatives listed in Annexes V and VI of EU Regulation 1223 / 2009 on cosmetic products and / or any other preservatives known to those skilled in the art, such as preservation boosters.

[0045] The term "viscosity" refers to all phenomena of resistance to the movement of a fluid in a flow with or without turbulence. According to the invention, the viscosities of the concentrated cosmetic composition and the ready-to-use cosmetic composition are measured at ambient temperature (20°C) and ambient pressure, using a Brookfield RV DV viscometer with a type 4 spindle, at a speed of 12 revolutions per minute. DETAILED DESCRIPTION

[0046] Concentrated cosmetic composition

[0047] The present invention relates to a concentrated cosmetic composition, to be diluted, comprising at least one surfactant; at least one preservative; optionally, at least one aqueous phase thickening and / or gelling agent; and a cosmetically acceptable solvent.

[0048] In one embodiment, the concentrated cosmetic composition according to the invention comprises at least one surfactant; at least one preservative; at least an aqueous phase thickening and / or gelling agent; and a cosmetically acceptable solvent.

[0049] In another embodiment, the concentrated cosmetic composition according to the invention does not include a thickening and / or gelling agent.

[0050] In a preferred embodiment, the concentrated cosmetic composition according to the invention comprises:

[0051] - from 5% to 80% of at least one surfactant;

[0052] - from 0.1% to 30% of at least one preservative agent;

[0053] - from 0.0% to 30% of at least one aqueous-phase thickening and / or gelling agent; and

[0054] - from 10% to 60% of a cosmetically acceptable solvent chosen from water or a a mixture of water and at least one water-soluble organic solvent,

[0055] the percentages being expressed in weight relative to the total weight of the concentrated cosmetic composition.

[0056] In another preferred embodiment, the concentrated cosmetic composition according to the invention comprises:

[0057] - from 5% to 80% of at least one surfactant;

[0058] - from 0.1% to 30% of at least one preservative agent;

[0059] - from 0.1% to 30% of at least one aqueous-phase thickening and / or gelling agent; and

[0060] - from 10% to 60% of a mixture of water and at least one soluble organic solvent in the water,

[0061] the percentages being expressed in weight relative to the total weight of the concentrated cosmetic composition.

[0062] Furthermore, in another preferred embodiment, the concentrated cosmetic composition according to the invention comprises:

[0063] - from 5% to 80% of at least one surfactant;

[0064] - from 0.1% to 30% of at least one preservative agent;

[0065] - 0.0% of at least one aqueous-phase thickening and / or gelling agent; and

[0066] - from 10% to 60% of a cosmetically acceptable solvent chosen from water or a a mixture of water and at least one water-soluble organic solvent,

[0067] the percentages being expressed in weight relative to the total weight of the concentrated cosmetic composition.

[0068] According to the invention, the concentrated cosmetic composition is liquid, i.e., it has a viscosity of less than 1300 mPa·s, and is homogeneous. In one embodiment, the concentrated cosmetic composition according to the present invention is transparent. In one embodiment, the concentrated cosmetic composition according to the present invention is liquid and / or homogeneous and / or transparent.

[0069] Surfactant

[0070] According to one embodiment, the surfactant(s) that may be used according to the present invention are chosen from anionic surfactants, cationic surfactants, amphoteric surfactants, non-ionic surfactants, or a mixture thereof.

[0071] Non-limiting examples of anionic surfactants that may be used according to the invention include alkyl sulfates; alkyl ether sulfates; alkylamido ether sulfates; alkylaryl polyether sulfates; monoglyceride sulfates; alkylsulfonates; alkylamide sulfonates; alkylarylsulfonates; α-olefinsulfonates; paraffinsulfonates; alkyl sulfosuccinates; alkyl ether sulfosuccinates; alkylamide sulfosuccinates; alkyl sulfoacetates; acyl sarcosinates; acyl glutamates; alkyl ether carboxylates; alkyl sulfosuccinamates; acyl isethionates and N-acyl taurate; monoalkyl esters of polyglycoside and polycarboxylic acids; acyl lactylates; D-galactosideuronic acid salts; alkyl ether carboxylic acid salts; alkylaryl ether carboxylic acid salts;the salts of alkylamido ether carboxylic acids and the corresponding unsalted forms of all these compounds, the alkyl and acyl groups of all these compounds comprising from 6 to 24 carbon atoms and the aryl group denoting a phenyl group; lipo-amino acids such as sodium lauroyl oat amino acids and sodium cocoyl apple amino acids; or a mixture thereof.

[0072] In one embodiment, the anionic surfactant is a salt of at least one anionic surfactant as described above. In one embodiment, the salt is selected from alkali metal salts such as sodium or potassium salts; ammonium salts; amine salts such as amino alcohol salts; or alkaline earth metal salts such as magnesium salts.

[0073] Non-limiting examples of cationic surfactants that may be used according to the invention include distearoylethylhydroxyethylmonium methosulfate, soytrimonium chloride, octacosatrimonium chloride, ceteartrimonium chloride, tallowtrimonium chloride, dodecylhexadecyltrimonium chloride, octyldodecyltrimonium chloride, cocotrimonium chloride, steartrimonium chloride, laurtrimonium chloride, cetrimonium chloride, dodecylbenzyltrimonium chloride, di-C12-C15 alkyl dimonium chloride, C12-C18 dialkyldimonium chloride, di-C12-C18 alkyl dimonium chloride, dicapryl / dicaprylyl dimonium chloride, didecyldimonium chloride, chloride of dicetyldimonium, ditallowdimonium chloride, dicocodimonium chloride, distearyldimonium chloride, ceteardimonium chloride, behenalkonium chloride, olealkonium chloride, hydroxyethyl oleyl dimonium chloride,cinnamidopropyltrimonium chloride, lactamidopropyltrimonium chloride, behenoyl pg-trimonium chloride, stearoxypropyltrimonium chloride, lauroyl pg-trimonium chloride, palmitamidopropyltrimonium chloride, the , ricinoleamidopropyltrimonium chloride, panthenyl hydroxypropyl steardimonium chloride, hydroxypropyl bis-hydroxyethyldimonium chloride, hydroxypropyl bisstearyldimonium chloride, hydroxycetyl hydroxyethyl dimonium chloride, hydroxyethyl behenamidopropyl dimonium chloride, be-henamidopropyl pg-dimonium chloride, cocamidopropyl pg-dimonium chloride, oleamidopropyl pg-dimonium chloride, behentrimonium chloride, or a mixture thereof.

[0074] Non-limiting examples of amphoteric or zwitterionic surfactants that can be used according to the invention include secondary or tertiary aliphatic amine derivatives possibly quaternized comprising at least one anionic group, for example a carboxylate, sulfonate, sulfate, phosphate or phosphonate group, and in which at least one aliphatic group is a linear or branched chain comprising 8 to 22 carbon atoms.

[0075] Examples include (C8-C20) alkyl betaines, sulfobetaines, (C8-C20) alkylamido (C1-C6) betaines such as cocoamidopropyl betaine, or (C8-C20) alkylamido (C1-C6) alkyl sulfobetaines.

[0076] We can also mention secondary or tertiary aliphatic amines possibly quaternized such as disodium cocoamphodiacetate, disodium lauroamphodiacetate, disodium caprylamphodiacetate, disodium caprylamphodiacetate, disodium cocoamphodipropionate, disodium lauroamphodipropionate, disodium ca-prylamphodipropionate, disodium caprylamphodipropionate, lauroamphodipropionic acid and cocoamphodipropionic acid.

[0077] Non-limiting examples of non-ionic surfactants that may be used according to the invention include:

[0078] - Alkoxylated derivatives of fatty alcohols, alkylphenols, fatty acids, esters of fatty acids and fatty acid amides. In one embodiment, the alkoxy groups are chosen from the group consisting of C2-C6 oxides and mixtures thereof, such as ethylene oxide, propylene oxide, and mixtures thereof. The alkyl chain may be linear, branched, saturated, or unsaturated;

[0079] - alkylpolyglucosides, which are the condensation products of long-chain alcohols chain, for example C8-C30 fatty alcohols, with sugar or starch polymers. These compounds can be represented by the formula (S)n—O—R in which S is a sugar fragment; n is an integer from about 1 to about 1000, and R is a C8-C30 alkyl group. Non-limiting examples of long-chain alcohols include decyl alcohol, cetyl alcohol, stearyl alcohol, lauryl alcohol, myristyl alcohol, or oleyl alcohol;

[0080] -alkanolamides resulting from the acylation of an amino alcohol by a fatty acid. Non-limiting examples of amino alcohols include monoethanolamine, dietha- nolamine, isopropanolamine or diethylene glycolamine (2-(2-aminoethoxy)ethanol). Non-limiting examples of fatty acids include lauric acid, palmitic acid, stearic acid, oleic acid, linoleic acid and fatty acids derived from vegetable oils such as coconut oil, soybean oil, canola oil, wheat germ oil, peanut oil, corn oil, olive oil;

[0081] - esters of sugars and mono- or polyacids having from 6 to 30 carbon atoms. Non-limiting examples of mono- or polyacids having 6 to 30 carbon atoms include oleic acid, lauric acid, palmitic acid, myristic acid, behenic acid, stearic acid, linoleic acid, linolenic acid, capric acid, arachidonic acid, or mixtures thereof such as mixed esters oleo-palmitate, oleo-stearate, palmito-stearate;

[0082] - glyceryl esters such as glyceryl oleate, glyceryl monostearate, the glyceryl monoistearate, glyceryl monopalmitate, glyceryl monobehenate and mixtures thereof; polyglyceryl esters such as poly-glyceryl-4 isostearate, polyglyceryl-3 oleate, polyglyceryl-2 sesquioleate, triglyceryl dii-sostearate, diglyceryl monooleate, tetraglyceryl monooleate and mixtures thereof;

[0083] - sorbitan mono-, di-, tri-, and esters such as sorbitan monooleate, ses sorbitan quioleate, sorbitan monoisostearate, sorbitan stearates, sorbitan trioleate, sorbitan tristearate, sorbitan dipalmitates and sorbitan isostearate;

[0084] - alkoxylated derivatives of glyceryl esters, sorbitan esters and of alkylpolyglycosides, in which the alkoxy groups are chosen from the group consisting of C2-C6 oxides and their mixtures, with ethoxylated or propoxylated derivatives being preferred;

[0085] - tri-block copolymers of formula HO(C2H4O)a(C3H6O)b(C2H4O)aH, in where “a” represents a hydrophilic unit of polyethylene oxide (PEO) and “b” a hydrophobic unit of polypropylene oxide (PPO).

[0086] The term "sugar" refers to hydrocarbon compounds containing oxygen that possess several alcohol functional groups, with or without aldehyde or ketone functional groups, and have at least four carbon atoms. Sugars may be monosaccharides, oligosaccharides, or polysaccharides. Suitable sugars include, but are not limited to, sucrose, glucose, galactose, ribose, fucose, maltose, fructose, mannose, arabinose, xylose, lactose, and their derivatives, for example, alkylated derivatives such as methyl glucose.

[0087] In one embodiment, a mixture of surfactants chosen from the surfactants as described above is used.

[0088] In one embodiment, the surfactant or mixture of surfactants is present in an amount ranging from 5% to 80% by weight relative to the total weight of the concentrated cosmetic composition. In one embodiment, in an amount ranging from 15% to 70%. In a preferred embodiment, in an amount ranging from 25% to 55%.

[0089] According to one embodiment, when the concentrated cosmetic composition comprises at least one aqueous-phase gelling and / or thickening agent, then a mixture of at least one anionic surfactant, at least one non-ionic surfactant, and at least one amphoteric surfactant is used. In another embodiment, a mixture of at least one non-ionic surfactant and at least one amphoteric surfactant is used. Yet another embodiment uses a mixture of at least one anionic surfactant and at least one amphoteric surfactant.

[0090] According to another embodiment, when the concentrated cosmetic composition does not include an aqueous phase gelling and / or thickening agent, then the surfactant or mixture of surfactants is chosen from non-ionic surfactants.

[0091] In a preferred embodiment, the anionic surfactant(s) are selected from C6-C24 alkyl sulfates, C6-C24 alkyl ether sulfates or one of their salts such as sodium laureth sulfate or ammonium lauryl sulfate.

[0092] In one embodiment, the anionic surfactant(s) are present in an amount ranging from 5% to 40% by weight relative to the total weight of the concentrated cosmetic composition. In another embodiment, in an amount ranging from 10% to 30%. In a preferred embodiment, in an amount ranging from 15% to 30%.

[0093] In a preferred embodiment, the non-ionic surfactant(s) are chosen from alkanolamides, alkyl polyglucosides, esters of sugars and mono- or polyacids having 6 to 30 carbon atoms or a mixture thereof.

[0094] In a more preferred embodiment, when the concentrated cosmetic composition includes at least one gelling and / or thickening agent, then the non-ionic surfactant(s) are chosen from fatty acid-derived monoalkanolamides, preferably from monoethanolamides such as cocamide MEA, cocamide DEA, cocamide MIPA, lauric monoethanolamide, stearic monoethanolamide, oleic monoethanolamide or linoleic monoethanolamide, more preferably cocamide MIPA.

[0095] In another embodiment, when the concentrated cosmetic composition does not include an aqueous phase gelling and / or thickening agent, then the surfactant(s) are chosen from non-ionic surfactants having an HLB greater than 14, preferably from alkyl polyglucosides, esters of sugars and mono- or polyacids having 6 to 30 carbon atoms or a mixture thereof, more preferably among caprylyl / capryl glucoside, sucrose mono-, di- and tri-laurate or a mixture thereof.

[0096] The term "HLB" or "Hydrophilic / Lipophilic Balance" refers to a number used to characterize the predominantly lipophilic or hydrophilic nature of a surfactant. If the surfactant has an HLB greater than 10, it will be predominantly hydrophilic, and if the HLB is less than 10, it will be predominantly lipophilic. See "Encyclopedia of Chemical Technology, KIRK-OTHMER", Volume 22, pp. 333-432, 3rd edition, 1979, WILEY, for the definition of the properties and functions of surfactants.

[0097] In one embodiment, the non-ionic surfactant(s) are present in an amount ranging from 0% to 80% by weight relative to the total weight of the concentrated cosmetic composition. In another embodiment, in an amount ranging from 5% to 50%. In a preferred embodiment, in an amount ranging from 5% to 30%.

[0098] In a preferred embodiment, the amphoteric surfactant(s) are chosen from (C8-C20) alkylamido (C1-C6) alkylbetaines such as cocami-dopropyl betaine.

[0099] In one embodiment, the amphoteric surfactant(s) are present in an amount ranging from 5% to 30% by weight relative to the total weight of the concentrated cosmetic composition. In another embodiment, in an amount ranging from 5% to 20%. In a preferred embodiment, in an amount ranging from 5% to 15%.

[0100] Preservative

[0101] In one embodiment, the preservative agent(s) that can be used according to the present invention are chosen from organic acids or one of their salts; glycol ethers; halogenated preservatives; aldehydes; alcohols; cationic agents; essential oils; natural or synthetic antioxidants; organic or inorganic UV filters; or a mixture thereof.

[0102] Non-limiting examples of organic acids that may be used according to the invention include benzoic acid, propionic acid, salicylic acid, sorbic acid, p-hydroxybenzoic acid, dehydroacetic acid, formic acid, undecylenic acid, levulinic acid, or a mixture thereof. Salts and esters of at least one organic acid as described above may also be used. In one embodiment, the salt is selected from alkali metal salts such as sodium or potassium salts; ammonium salts; amine salts such as amino alcohol salts; halide salts such as chloride or bromide; alkaline earth metal salts such as magnesium and calcium salts; sulfate salts; or acetate salts.

[0103] Non-limiting examples of glycol ethers that may be used according to the invention include phenoxyethanol, phenoxypropanol, 2-butoxyethanol, ethoxydiglycol, or a mixture of these.

[0104] Non-limiting examples of halogenated preservatives that may be used according to the invention include triclosan, methylisothiazolinone, methylchloroisothiazolinone, chlorphenesin, chloroxylenol, iodopropynyl butylcarbamate, 5-Bromo-5-nitro-l,3-dioxane, 2-Bromo-2-nitropropane-l,3-diol, dichlorobenzyl alcohol, triclocarban, chlorocresol, chlorophene, bromochlorophene, chloroacetamide, or a mixture thereof.

[0105] Non-limiting examples of aldehydes or aldehyde releasers that may be used according to the invention include formaldehyde, glutaraldehyde, benzylhemiformal, diazolidinyl urea, imidazolidinyl urea, DMDM ​​hydantoin, sodium hydroxymethylglycinate, or a mixture thereof.

[0106] Non-limiting examples of alcohols that may be used according to the invention include ethanol, benzyl alcohol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, phenylpropanol or a mixture thereof.

[0107] Non-limiting examples of cationic agents that may be used according to the invention include primary, secondary and tertiary fatty amine salts optionally polyoxyalkylated, quaternary ammonium salts such as quatemium-15, alkyl (C12-C22) trimethyl ammonium bromides or chlorides such as behentrimonium chloride or bromide, cetrimonium chloride or bromide, laurtrimonium chloride or bromide, steartrimonium chloride or bromide; benzalkonium chloride, bromide or saccharinate; benzethonium chloride; or a mixture thereof.

[0108] Non-limiting examples of natural or synthetic antioxidants that may be used according to the invention include sulfites such as sulfur dioxide, sodium sulfite, sodium bisulfite, sodium metabisulfite, potassium metabisulfite, potassium sulfite, potassium bisulfite, calcium sulfite, calcium bisulfite; ascorbic acid or vitamin C and its derivatives, sodium ascorbates, calcium ascorbates, diacetyl 5,6-1-ascorbic acid, palmityl 6,1-ascorbic acid; citric acid, sodium citrates, potassium and calcium citrates; tartaric acid, sodium tartrates, potassium tartrate; butylhydroxyanisole, butylhydroxytoluene; octyl gallate, dodecyl gallate; sodium lactate, potassium lactate, calcium lactate;acetophenone derivatives such as hydroxyacetophenone and its mixture with phenoxyethanol, 1,2-pentanediol, 1,2-hexanediol or 1,2-octanediol; lecithins; natural tocopherols, α-tocopherol, γ-tocopherol, β-tocopherol, all the tocopherols constituting vitamin E; or a mixture thereof.

[0109] Non-limiting examples of organic or inorganic UV filters that can be used according to the invention include benzophenones and their derivatives such as ben- zophenone 3, benzophenone 4, benzophenone 5 or diethylamino hydroxybenzylidene benzoate; camphor derivatives such as 3-benzylidene camphor, 4-methylbenzylidene camphor, camphor benzalkonium methosulfate, polyacrylamidomethylbenzylidene camphor, benzylidene camphor sulfonic acid or tereph-talydene dicamphor sulfonic acid; salicylic acid derivatives such as homosalate, ethylhexyl salicylate or octyl salicylate; benzimidazoles such as phenylbenzimidazole sulfonic acid or disodium phenyl dibenzimidazole tetrasulfonate; dibenzoylmethane such as butyl methoxydibenzoylmethane; Benzotriazole derivatives such as drometrizole trisiloxane, methylene bis-benzotriazolyl tetramethylbutylphenol, benzotriazole dodecyl p-cresol or sodium benzotriazolyl butylphenol sulfate; 4-aminobenzoic acid derivatives such as ethylhexyl dimethyl PABA;cinnamates such as ethylhexyl methoxycinnamate or isoamyl p-methoxycinnamate; triazine derivatives such as ethylhexyl triazone, diethylhexyl butamido triazone or methylene bis-benzotriazolyl tetramethylbutylphenol; malonate such as polysilicone-15; metal oxides such as titanium dioxide, zinc oxide; magnesium silicate; kaolin; or a mixture thereof.

[0110] In one embodiment, the preservative agent is chosen from organic acids or one of their salts such as benzoic acid or one of its salts.

[0111] In one embodiment, the preservative is present in an amount ranging from 0.1% to 50% by weight relative to the total weight of the concentrated cosmetic composition. In another embodiment, in an amount ranging from 0.5% to 25%. In another embodiment, in an amount ranging from 0.5% to 10%.

[0112] Aqueous phase thickening and / or gelling agent

[0113] In one embodiment, the aqueous phase gelling and / or thickening agent(s) that can be used according to the present invention are chosen from synthetic gelling agents, natural gelling agents; semi-synthetic or chemically transformed natural gelling agents; salts; combinations of surfactants or a mixture thereof.

[0114] Non-limiting examples of synthetic gelling and / or thickening agents that may be used according to the invention include anionic gelling agents such as carbomers, sodium polyacrylate, acrylic or methacrylic acid copolymers, copolymers of acrylic or methacrylic acid and a C1-C30 alkyl acrylate or methacrylate, modified sulfonated acrylic acid copolymers, associative acrylic polymers or copolymers or a mixture thereof; cationic gelling agents such as acrylamidopropyltrimonium chloride / acrylate copolymer or poly-quatemium-37; polyethylene glycols such as glycerol fatty acid polyesters or ethoxylated polyglycerols or monosaccharide fatty acid polyesters ethoxylated.

[0115] Non-limiting examples of natural gelling agents that can be used according to the invention include gums such as xanthan gum, guar gum, acacia gum, gum arabic, locust bean gum, tara gum, gellan gum, tragacanth gum, alginates, carrageenans, gelatin; pectins; agar-agar or a mixture thereof.

[0116] Non-limiting examples of chemically transformed semi-synthetic or natural origin gelling agents that can be used according to the invention include starch and its derivatives; celluloses such as microcrystalline cellulose, cellulose gum, cellulose powder, methylcellulose, ethylcellulose, hydroxycellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, ethylcellulose, carboxymethylcellulose or a mixture thereof.

[0117] Non-limiting examples of salts that may be used according to the invention include halides of alkali metals, alkaline earth metals, ammonium, or other metals such as aluminum and zinc; sulfates and phosphates of alkali metals, alkaline earth metals, ammonium, or other metals such as aluminum and zinc; salts of monethanolamine (MEA) and diethanolamine (DEA); alkali metal silicates or a mixture thereof. Examples include sodium chloride, potassium chloride, sodium sulfate, potassium sulfate, magnesium chloride, magnesium sulfate, zinc sulfate, ammonium chloride, or MEA chloride.

[0118] Non-limiting examples of surfactant combinations include combinations of isethionate, alkyl betaine, alkyl polyglucoside and alkanolamide surfactants.

[0119] In one embodiment, the aqueous phase thickening and / or gelling agent(s) that may be used according to the present invention are selected from polyethylene glycols such as glycerol fatty acid polyesters or ethoxylated polyglycerols; ethoxylated monosaccharide fatty acid polyesters; or a mixture thereof. In a preferred embodiment, the aqueous phase thickening and / or gelling agent is an ethoxylated monosaccharide fatty acid polyester selected from ethoxylated glucoside fatty acid polyesters, preferably from ethoxylated methylglucoside fatty acid diesters. In a more preferred embodiment, the aqueous phase thickening and / or gelling agent is PEG-120 Methyl Glucose Dioleate.

[0120] In one embodiment, a combination of a thickening and / or gelling agent of the type of ethoxylated monosaccharide fatty acid polyesters and a non-ionic alkanolamide-type surfactant as described above is used. In one embodiment of Preferred formulation, an association of PEG-120 Methyl Glucose Dioleate and cocamide MIPA is used in a ratio of PEG-120 Methyl Glucose Dioleate to cocamide MIPA ranging from 1:5 to 1:15.

[0121] In one embodiment, the aqueous phase thickening and / or gelling agent is present in an amount ranging from 0.0% to 30% by weight relative to the total weight of the concentrated cosmetic composition. In another embodiment, in an amount ranging from 0.1% to 30%. In another embodiment, in an amount ranging from 0.5% to 25%. In a preferred embodiment, in an amount ranging from 0.5% to 15%.

[0122] In one embodiment, the concentrated cosmetic composition according to the present invention does not include aqueous phase thickening and / or gelling agents.

[0123] Advantageously, in this embodiment, the viscosity of the concentrated cosmetic composition after dilution is unchanged compared to the viscosity of the concentrated composition before dilution.

[0124] Cosmetically acceptable solvent

[0125] According to one embodiment, the cosmetically acceptable solvent is chosen from water or a mixture of water and at least one water-soluble organic solvent.

[0126] In one embodiment, the water-soluble organic solvent is selected from mono-alcohols and polyols such as ethyl alcohol, isopropyl alcohol, propyl alcohol, benzyl alcohol, phenylethyl alcohol, glycerol, glycols or glycol ethers such as monomethyl, monoethyl and monobutyl ethers of ethylene glycol, propylene glycol or its ethers such as monomethyl ether of propylene glycol, butylene glycol, hexylene glycol, dipropylene glycol as well as alkyl ethers of diethylene glycol such as monoethyl ether or monobutyl ether of diethylene glycol; or a mixture of these.

[0127] In one embodiment, the water-soluble organic solvent is a polyol selected from glycerol, glycols, or a mixture thereof. In a preferred embodiment, the water-soluble organic solvent is propylene glycol.

[0128] In one embodiment, the cosmetically acceptable solvent is present in an amount ranging from 10% to 60% by weight relative to the total weight of the concentrated composition, preferably ranging from 15% to 55%, more preferably ranging from 20% to 50%.

[0129] According to a preferred embodiment, when the concentrated composition according to the present invention comprises at least one aqueous phase thickening and / or gelling agent as described above, then the cosmetically acceptable solvent is a mixture of water and at least one water-soluble organic solvent.

[0130] According to the invention, when the concentrated cosmetic composition comprises at least one aqueous phase thickening and / or gelling agent, then the cosmetic composition concentrated contains less than 30% water by weight relative to the total weight of the concentrated cosmetic composition.

[0131] Advantageously, the aqueous phase thickening and / or gelling agent is solubilized and not deployed, i.e. not creating a three-dimensional network, in the concentrated cosmetic composition, thus allowing the concentrated cosmetic composition according to the present invention to remain in a liquid state, i.e. having a viscosity of less than 1300 mPa.s, and homogeneous, without alteration of stability.

[0132] According to another embodiment, when the concentrated composition according to the present invention does not include an aqueous phase thickening and / or gelling agent as described above, then the cosmetically acceptable solvent is water present in an amount of less than 60% by weight relative to the total weight of the concentrated cosmetic composition, preferably less than 50%.

[0133] Addendum

[0134] According to one embodiment, the concentrated cosmetic composition according to the invention further comprises at least one additional compound different from the ingredients as described above.

[0135] In one embodiment, the concentrated composition according to the invention further comprises at least one humectant, at least one colouring agent selected from water-soluble or fat-soluble organic colourings, natural colourings of vegetable or mineral origin, pigments, mother-of-pearl or a mixture thereof; and at least one ingredient selected from cosmetic actives such as conditioning agents, perfumes, stabilizers, chelators, pH adjusting agents or a mixture thereof.

[0136] A person skilled in the art will know how to adjust the quantity of the cosmetic ingredient(s) so as not to alter the organosensory qualities and properties of the concentrated composition according to the present invention.

[0137] In the case where a hair care product is desired, then the concentrated composition according to the invention may further comprise at least one conditioning agent selected from cationic polymers; cationic surfactants; organosilicones; non-siliconized liquid or solid fatty substances such as hydroxylated or non-hydroxylated fatty acids, liquid or solid fatty alcohols, mineral, vegetable or animal oils or waxes, fatty esters, liquid or solid hydrocarbon compounds, liquid or solid fatty amides; amino acids; moisturizing or humectant agents, in particular glycols and polyols which are in particular liquid, non-ionic saccharides, including hydrolyzed or non-hydrolyzed oligosaccharides, modified or unmodified.

[0138] The term “conditioning agent” refers to any compound capable of producing a conditioning effect on the skin or hair when the cosmetic composition concentrated according to the invention is used to reconstitute a ready-to-use cosmetic composition suitable for cleaning keratin fibers as described below.

[0139] In a preferred embodiment, the conditioning agent is chosen from cationic polymers.

[0140] Non-limiting examples of cationic polymers that may be used according to the invention include starch hydroxypropyltrimonium chloride, guar hydroxypropyltrimonium chloride, carob hydroxypropyltrimonium chloride, caesalpinia spinosa hydroxypropyltrimonium chloride, cassia hydroxypropyltrimonium chloride, dextran hydroxypropyltrimonium chloride, hydroxypropyl guar hydroxypropyltrimonium chloride, oxidized starch hydroxypropyltrimonium chloride, hydrogenated starch hydrolysate hydroxypropyltrimonium chloride, ginseng hydroxypropyltrimonium chloride, lauryl methyl gluceth-10 hydroxypropyldimonium chloride, acrylamidopropyltrimonium chloride / acrylamide copolymer, and propyltrimonium chloride copolymer. acrylamide / dimethyl-lacrylamide, dimethylacrylamide / ethyltrimonium methacrylate chloride copolymer, polymethacrylamide propyltrimonium chloride,le copolymère de-chlorure d’acrylamidopropyltrimonium / acrylate, le chlorure de pg-hydroxyethylcellulose cocodimonium, le chlorure de pg-hydroxyethylcellulose stearyl-dimonium, le chlorure de soyamidopropalkonium, le chlorure de distearoylethyl dimonium, le chlorure de dipalmitoylethyl dimonium, les polyquatemium tels que po-lyquaternium-1, polyquatemium-10, polyquatemium-104, polyquatemium-11, poly-quatemium-15, polyquatemium-16, polyquatemium-18, polyquatemium-19, poly-quatemium-2, polyquaternium-22, polyquaternium-24, polyquaternium-28, poly-quatemium-30, polyquaternium-32, polyquaternium-33, polyquaternium-35, poly-quatemium-37, polyquaternium-39, polyquaternium-4, polyquaternium-43, poly-quatemium-44, polyquaternium-46, polyquaternium-47, polyquaternium-49, poly-quatemium-50, polyquaternium-51, polyquaternium-52, polyquaternium-53, poly-quatemium-55, polyquaternium-56, polyquaternium-57, polyquaternium-6, poly-quatemium-61, polyquaternium-62, polyquaternium-63, polyquaternium-64,poly-quaternium-65, polyquaternium-67, polyquaternium-68, polyquaternium-69, poly-quaternium-7, polyquaternium-73, polyquaternium-74, polyquaternium-75, poly-quaternium-76, polyquaternium-78 and polyquaternium-80. ,

[0141] In a preferred embodiment, the cationic polymer is chosen from among the polyquaterniums as described above.

[0142] In one embodiment, when the concentrated composition according to the invention comprises a cationic polymer, the latter is present in an amount ranging from 0.1% to 10.0% by weight relative to the total weight of the suspension. In a preferred embodiment, in an amount ranging from 0.1% to 5.0%.

[0143] pH, viscosity and stability

[0144] In one embodiment, the concentrated cosmetic composition according to the present invention has a pH greater than 4.0. In another embodiment, a pH ranging from 4.0 to 7.0. In a preferred embodiment, a pH ranging from 4.0 to 6.0.

[0145] In one embodiment, the concentrated cosmetic composition according to the present invention has a viscosity of less than 1300 mPa.s. In another embodiment, a viscosity ranging from 0.5 mPa.s to 1300 mPa.s. In a preferred embodiment, a viscosity ranging from 100 mPa.s to 1000 mPa.s.

[0146] Advantageously, the concentrated cosmetic composition according to the present invention is liquid and homogeneous, which allows easier flow without loss of material on the walls of a container and therefore easier handling during dilution.

[0147] Another advantage is that the ready-to-use cosmetic composition according to the invention has a stability of more than one month, preferably more than twelve months, more preferably more than twenty-four months and can therefore be stored for several months before use, preferably up to 36 months.

[0148] Ready-to-use cosmetic composition

[0149] According to one embodiment, the invention also relates to a ready-to-use cosmetic composition comprising a concentrated cosmetic composition according to the invention and water.

[0150] The embodiments defining the concentrated cosmetic composition above apply mutatis mutandis to the ready-to-use cosmetic composition according to the invention.

[0151] In one embodiment, the ready-to-use cosmetic composition comprises a concentrated cosmetic composition according to the invention and water in a ratio of the concentrated cosmetic composition to the water ranging from 1:2 to 1:20, preferably in a ratio ranging from 1:2 to 1:15.

[0152] In one embodiment, the ready-to-use cosmetic composition comprises 5% to 50%, preferably 5% to 20%, of a concentrated cosmetic composition according to the invention and 50% to 95%, preferably 80% to 95%, of water, the percentages being expressed by weight relative to the total weight of the ready-to-use cosmetic composition.

[0153] In one embodiment, the ready-to-use cosmetic composition comprises:

[0154] - from 5% to 50%, preferably from 5% to 20% of a cosmetic composition concentrated, comprising at least one surfactant; at least one preservative; optionally, at least one aqueous-phase thickening and / or gelling agent; and a cosmetically acceptable solvent, and

[0155] - from 50% to 95%, preferably from 80% to 95% water,

[0156] the percentages being expressed in weight relative to the total weight of the ready-to-use cosmetic composition.

[0157] In a preferred embodiment, the ready-to-use cosmetic composition comprises: • 5% to 50%, preferably 5% to 20% by weight relative to the total weight of the ready-to-use cosmetic composition, of a concentrated cosmetic composition comprising:

[0158] - from 5% to 80% of at least one surfactant;

[0159] - from 0.1% to 30% of at least one preservative agent;

[0160] - from 0.0% to 30% of at least one aqueous-phase thickening and / or gelling agent; and

[0161] - from 10% to 60% of a cosmetically acceptable solvent chosen from water or a mixture of water and at least one water-soluble organic solvent;

[0162] the percentages being expressed as a percentage of the total weight of the concentrated cosmetic composition, and • 50% to 95%, preferably 80% to 95% by weight relative to the total weight of the ready-to-use cosmetic composition, of water.

[0163] In one embodiment, the ready-to-use cosmetic composition according to the invention is obtained by mixing a concentrated cosmetic composition according to the invention with water.

[0164] The term "mixing," and all its variants, refers to the dilution, contacting, combining, reconstituting, dissolving, dispersing, blending, or stirring of the concentrated cosmetic composition with water. It can also mean introducing the concentrated cosmetic composition into water and vice versa. It can also mean placing the concentrated cosmetic composition in the same container or vessel as the water and vice versa. For the purposes of this invention, stirring the concentrated cosmetic composition with water is carried out manually by a user and does not require the use of a motorized mixer.

[0165] In a preferred embodiment, the ready-to-use cosmetic composition according to the invention is obtained by diluting the concentrated cosmetic composition according to the invention in water.

[0166] In one embodiment, the ready-to-use cosmetic composition according to the invention is obtained by diluting in water a concentrated cosmetic composition according to the invention, in a ratio of the concentrated cosmetic composition to the water ranging from 1:2 to 1:20, preferably in a ratio ranging from 1:2 to 1:15.

[0167] According to one embodiment, when the concentrated cosmetic composition according to the present invention comprises at least phase thickening and / or gelling agent aqueous, then the viscosity of the ready-to-use cosmetic composition obtained by dilution of the concentrated cosmetic composition is greater than the viscosity of the concentrated composition before dilution.

[0168] In one embodiment, when the concentrated cosmetic composition according to the invention comprises at least one aqueous-phase thickening and / or gelling agent, then the ready-to-use cosmetic composition has a viscosity greater than 1300 mPa·s. In one embodiment, a viscosity ranging from 1300 mPa·s to 50000 mPa·s. In one embodiment, a viscosity ranging from 1300 mPa·s to 20000 mPa·s. In a preferred embodiment, a viscosity ranging from 1300 mPa·s to 15000 mPa·s.

[0169] In one embodiment, when the concentrated cosmetic composition according to the invention comprises at least one aqueous phase thickening and / or gelling agent, then the ready-to-use cosmetic composition obtained by dilution of the concentrated cosmetic composition is in the form of an aqueous gel.

[0170] According to another embodiment, when the concentrated cosmetic composition according to the invention does not include an aqueous phase thickening and / or gelling agent, then the viscosity of the ready-to-use cosmetic composition obtained by dilution of the concentrated cosmetic composition is unchanged compared to the viscosity of the concentrated cosmetic composition before dilution.

[0171] In one embodiment, when the concentrated cosmetic composition according to the invention does not include an aqueous-phase thickening and / or gelling agent, then the ready-to-use cosmetic composition has a viscosity of less than 1300 mPa·s. In another embodiment, a viscosity ranging from 0.5 mPa·s to 1300 mPa·s. In a preferred embodiment, a viscosity ranging from 100 mPa·s to 1000 mPa·s.

[0172] In one embodiment, when the concentrated cosmetic composition according to the invention does not include an aqueous phase thickening and / or gelling agent, then the ready-to-use cosmetic composition obtained by dilution of the concentrated cosmetic composition is in the form of an aqueous fluid.

[0173] Advantageously, the ready-to-use cosmetic composition according to the present invention is in the form of a transparent and homogeneous gel or aqueous fluid.

[0174] Method for preparing a ready-to-use cosmetic composition according to the invention

[0175] The present invention also relates to a method of preparing a ready-to-use cosmetic composition according to the invention, comprising a step of mixing the concentrated cosmetic composition according to the invention with water, and a step of stirring the resulting mixture.

[0176] In a preferred embodiment, the method of preparing a composition ready-to-use cosmetic according to the invention, includes a step of diluting the concentrated cosmetic composition according to the invention in a predefined volume of water, and a step of stirring the resulting mixture.

[0177] In a preferred embodiment, the dilution in a predefined volume of water of the concentrated cosmetic composition according to the invention is carried out in a suitable container such as a jar, a bottle, a vial or a flask, at room temperature or at a temperature close to room temperature, i.e. at a temperature ranging from 15°C to 40°C, preferably ranging from 17°C to 30°C.

[0178] Advantageously, when the ready-to-use cosmetic composition has been fully used by the user, the appropriate container can be reused for the dilution of a new concentrated cosmetic composition.

[0179] In one embodiment, the dilution of the concentrated cosmetic composition according to the invention is carried out by introducing a predefined volume of water into the concentrated cosmetic composition followed by stirring the resulting mixture.

[0180] In a preferred embodiment, the dilution of the concentrated cosmetic composition according to the invention is carried out by introducing the concentrated cosmetic composition into a predefined volume of water followed by stirring the resulting mixture.

[0181] In a preferred embodiment, the dilution of the concentrated cosmetic composition is carried out with a ratio of the concentrated cosmetic composition to water ranging from 1:2 to 1:20, preferably ranging from 1:2 to 1:15.

[0182] In a preferred embodiment, the agitation of the resulting mixture consists of a simple manual agitation of the container, carried out by a user for a time of less than 2 minutes, preferably less than 1 minute.

[0183] Advantageously, when the concentrated cosmetic composition according to the invention comprises at least one aqueous phase thickening and / or gelling agent, thickening after dilution of the concentrated cosmetic composition according to the invention is observed in a time of less than 2 minutes, preferably less than 1 minute.

[0184] In one embodiment, the concentrated cosmetic composition is stored in a suitable container such as a jar, a bottle, a vial or a flask, the volume of which is sufficiently large to allow the addition, by pouring or dispensing, of a volume of water necessary to dilute the concentrated cosmetic composition.

[0185] In a preferred embodiment, the volume of water required for the dilution of the concentrated cosmetic composition is introduced into a first container such as a jar, a bottle, a vial, or a flask, the volume of which is sufficiently large to allow the addition, by pouring or dispensing, of the concentrated cosmetic composition contained in a second container such as a jar, a bottle, a vial, a flask which may for example be equipped with a dosing system; a water-soluble or non-water-soluble sachet, a berlingo, a doypack-type container or a capsule.

[0186] In one embodiment, the first container and the second container may be separated by a temporary "barrier" which is removed or compromised, before use, to allow the mixing of the concentrated cosmetic composition with the volume of water necessary to dilute the concentrated cosmetic composition, the barrier being deformable, tearable, breakable, removable or soluble.

[0187] In a preferred embodiment, the concentrated cosmetic composition is stored in a capsule equipped with a lid that can be broken by mechanical action and allows the concentrated cosmetic composition to be poured into the volume of water required for dilution, the volume of water required for dilution being stored in a container such as a jar, bottle, vial, or flask. The resulting mixture is then homogenized by simply shaking the container manually by a user.

[0188] In one embodiment, the water used for diluting the concentrated cosmetic composition has a water content between 0 and 7. In another embodiment, a water content between 7 and 15. In another embodiment, a water content between 15 and 30. In another embodiment, a water content between 30 and 40. In another embodiment, a water content greater than 40.

[0189] The term "total hardness" or "hardness" refers to the mineralization level of water. By definition, only the Ca2+ and Mg2+ ions, which are predominant in water, are taken into account in the calculation of water hardness; the others are considered negligible. Total hardness (TH) is calculated using the following equation:

[0190] TH= 10([Ca2+]+ [Mg2+])

[0191] wherein the concentrations are expressed in mmol / L and the water content in °f (French degree), one French degree corresponding to the hardness of a solution containing 10 mg / L of calcium carbonate CaCO3.

[0192] In one embodiment, the water used for diluting the concentrated cosmetic composition is selected from purified water, tap water, filtered water, natural mineral water, or spring water. In a preferred embodiment, the water used for diluting the concentrated cosmetic composition is tap water.

[0193] Use of a ready-to-use cosmetic composition according to the invention

[0194] According to the invention, the ready-to-use cosmetic composition obtained by diluting the concentrated cosmetic composition according to the invention in a predefined volume of water is directly usable as a cosmetic composition, in particular, suitable for cleaning keratinous fibers such as the skin of the body and / or face and / or hair, i.e., it does not require the addition of ingredients other than the volume of water required to dilute the concentrated cosmetic composition.

[0195] Advantageously, the ready-to-use cosmetic composition according to the invention has a stability of more than one month, preferably more than twelve months, more preferably more than twenty-four months and can therefore be stored for several months before and / or during use, preferably up to 36 months.

[0196] In one embodiment, when the concentrated cosmetic composition according to the invention comprises at least one aqueous phase thickening and / or gelling agent, then the ready-to-use cosmetic composition obtained by dilution of the concentrated cosmetic composition is in the form of a gel suitable for cleaning keratin fibers such as body and / or face skin and / or hair, for example a shower gel, a facial cleansing gel or a hair cleansing product such as a shampoo or shampoo conditioner.

[0197] In another embodiment, when the concentrated cosmetic composition according to the invention does not include aqueous phase thickening and / or gelling agents, then the ready-to-use cosmetic composition obtained by dilution of the concentrated cosmetic composition is in the form of a micellar water suitable for cleaning keratin fibers such as body and / or face skin and / or hair, for example a facial cleansing lotion.

[0198] Kit

[0199] The present invention also relates to a kit for preparing a ready-to-use cosmetic composition according to the invention, comprising a first container, comprising a concentrated cosmetic composition according to the invention and a second container intended to receive a volume of water necessary for the dilution of the concentrated cosmetic composition.

[0200] In one embodiment, the first and second containers are chosen from a jar, a vial, a bottle, a bottle, a water-soluble or non-water-soluble sachet, a berlingo, or a capsule.

[0201] In one embodiment, the kit according to the invention further comprises an application means such as an applicator cap or an applicator dispenser. EXAMPLES

[0202] The present invention will be better understood by reading the following examples which illustrate the invention in a non-limiting way.

[0203] The concentrated cosmetic compositions according to Examples 1 to 4 are prepared according to any method known to those skilled in the art for the preparation of cosmetic compositions, using the ingredients described in Table 1 below.

[0204]

[0205]

[0206]

[0207]

[0208] All percentages mentioned for the compositions in the examples below are percentages by weight relative to the total weight of the composition. The viscosities of the concentrated cosmetic composition and the ready-to-use cosmetic composition are measured at ambient temperature (20°C) and ambient pressure, using a Brookfield RV DV viscometer with a type 4 mobile, at a speed of 12 revolutions per minute. Examples 1 to 4: Concentrated cosmetic compositions according to the invention. Table 1 below shows examples of concentrated cosmetic compositions to be diluted to reconstitute a suitable gel for cleansing the skin of the body and / or face and / or hair (example 1 to 3) and a micellar water (example 4). INCI Exemple 1 Exemple 2 Exemple 3 Exemple 4 aqua 20,00 - 26,00 20,00 - 26,00 20,00 - 26,00 40,00 -50,00 propylène glycol 20,00 - 26,00 12,00 - 18,00 12,00-18,00 - sodium laureth sulfate 20,00 - 26,00 20,00 - 26,00 - - ammonium lauryl sulfate - - 20,00 - 26,00 - caprylyl / capryl glucoside - - - 11,50- 14,50 sucrose laurate - - - 9,50-11,50 sucrose dilaurate - - - 1,50-2,50 sucrose trilaurate - - - 0,10 - 0,50 cocamidopropyl betaine 8,50-10,50 8,50-10,50 8,50-10,50 - cocamide mipa 8,50-10,50 8,50-10,50 - - PEG-7 glyceryl cocoate - - 13,50- 16,50 - hydrogenated starch hydrolys ate - - - 6,50 - 8,50 hydroxyacetophenone - - - 4,50 - 5,50 1,2-hexanediol - - - 2,25 - 2,75 laureth-11 carboxylic acid 4,00 - 5,00 4,00 - 5,00 - - sodium chloride 1.50-2.00 1.50-2.00 1.50-2.00 - benzoic acid 1.00-1.50 1.00-1.50 1.00-1.50 - glyceryl oleate - 0.50-1.05 0.50-1.05 - glycerin 0.50-1.50 - - - PEG-120 methyl glucose dioleate 0.50-1.05 0.50-1.05 8.00 - 9.50 0.00 polyquatemium-10 - 0.10 - 0.50 0.45 -0.55 - tetrasodium glutamate diacetate 0.10 - 0.50 0.10 - 0.50 0.10-0.50 - Additives 2.50 - 3.50 2.50 - 3.50 2.50-3.50 0.50-1.50 Cosmetic actives 0.00-1.50 0.00-1.50 0.00-1.50 0.00-1.50 pH 4.2 - 5.3 4.3-5.3 5.0-5.5 4.9 - 5.4 Viscosity (mPa.s) 100 - 700 100 - 700 700 - 1200 0-600 Appearance Clear, homogeneous, colorless liquid Clear, homogeneous liquid with a red color Clear, homogeneous liquid Clear, homogeneous liquid with an orange color

[0209] The stability of the concentrated cosmetic compositions of examples 1 to 4 was evaluated at different temperatures, up to 50°C and at different periods, up to 36 months.

[0210] During the test period, no impact of temperature increase was observed on the physicochemical properties (pH, viscosity), organoleptic parameters and performance, showing good stability of the concentrated cosmetic compositions over time.

[0211] Examples 5 to 20: Dilution of concentrated cosmetic compositions according to examples 1 to 4 and influence of water hardness on dilution. 1. Dilution of concentrated cosmetic compositions according to examples 1 to 4

[0212] The dilution of concentrated compositions comprising an aqueous phase thickening and / or gelling agent (example 5 to 7) and not comprising an aqueous phase thickening and / or gelling agent (example 8) was evaluated at room temperature in tap water.

[0213] 40 mL of the concentrated compositions of examples 1 to 3 were added to 160 mL tap water and 20 mL of the concentrated composition from Example 4 were added to 180 mL of tap water, the required volume of tap water being placed in a suitable container. The container was then shaken manually for 20 seconds.

[0214] Table 2 below shows the results of the dilution of the concentrated compositions according to examples 1 to 4.

[0215] [Tables2] Examples Composition Dilution Factor pH Viscosity (mPa.s) Appearance 5 Example 1 20 5 4.3 1000-500 0 Viscous, transparent, colorless gel Tap water 80 6 Example 2 20 5 4.4 1000-500 0 Viscous, transparent, red gel Tap water 80 7 Example 3 20 5 4.8 6500 - 14500 Viscous, transparent, colorless gel Tap water 80 8 Example 4 10 10 6.0 0-600 Homogeneous, transparent, orange liquid Tap water 90

[0216] An increase in viscosity was observed when diluting the concentrated compositions according to examples 1 to 3, allowing the reconstitution of a homogeneous and transparent aqueous gel, ready for use and suitable for cleaning the skin of the body and / or face and / or hair.

[0217] In the case of dilution of the concentrated composition according to example 4, not including gelling agents and / or aqueous phase thickeners, it was observed that the viscosity remains unchanged after dilution, allowing the reconstitution of a transparent and homogeneous micellar water, ready for use. 1. Influence of water hardness on the dilution of concentrated cosmetic compositions.

[0218] The dilution of the concentrated compositions according to examples 1 to 4 in waters of different hardnesses and the influence of hardness (d) on pH, viscosity and organoleptic parameters was evaluated.

[0219] Dilution waters used:

[0220] tap water, d = 42.5;

[0221]

[0222]

[0223] Vittel water, d = 100; distilled water, d = 0. Table 3 below shows the results of diluting the concentrated compositions comprising an aqueous-phase thickening and / or gelling agent according to Examples 1 to 3 in waters of different hardnesses. As before, a 5-fold dilution was applied to the concentrated compositions of Examples 1 to 3.

[0224] [Tables3] Examples Composition Dilution Factor pH Viscosity (mPa.s) Appearance 9 Example 1 20 5 4.3 1910 Viscous, transparent, and colorless gel Tap water 80 10 Example 1 20 5 4.3 3400 Viscous, transparent, and colorless gel Vittel water 80 11 Example 1 20 5 4.3 1950 Viscous, transparent, and colorless gel Distilled water 80 12 Example 2 20 5 4.4 2783 Viscous, transparent, red gel Tap water 80 13 Example 2 20 5 4.4 5217 Viscous, transparent, red gel Vittel water 80 14 Example 2 20 5 4.4 1850 Viscous, transparent, red gel Distilled water 80 15 Example 3 20 5 4.8 12240 Clear, colorless viscous gel Tap water 80 16 Example 3 20 5 4.8 18660 Clear, colorless viscous gel Tap water 80 17 Example 3 20 5 4.8 11020 Clear, colorless viscous gel Distilled water 80

[0225] The results show that the pH or organoleptic parameters of the ready-to-use compositions were not impacted by the water hardness. A slight increase in viscosity was observed with Vittel water, which has a hardness of 100, but this did not impact the organoleptic parameters and performance of the ready-to-use composition.

[0226] Table 4 below shows the results of diluting the concentrated composition, which does not contain an aqueous-phase thickening and / or gelling agent, according to Example 4, in waters of different hardnesses. As before, a 10-fold dilution was applied to the concentrated composition according to Example 4.

[0227] [Tables4] Examples Composition Dilution Factor pH Viscosity (mPa.s) Appearance 18 Example 4 10 10 6.0 0-600 Homogeneous clear orange liquid Tap water 90 19 Example 4 10 10 6.0 0-600 Homogeneous clear orange liquid Vittel water 90 20 Example 4 10 10 6.0 0-600 Homogeneous clear orange liquid Distilled water 90

[0228] The results show that the pH or organoleptic parameters of the ready-to-use composition were not impacted by the water hardness.

[0229] The stability of ready-to-use cosmetic compositions according to examples 5 to 20 was evaluated at different temperatures, up to 50°C and at different periods of time, up to 36 months.

[0230] During the test period, a slight decrease in viscosity with increasing temperature was observed, while the pH, organoleptic parameters and performance of the ready-to-use compositions were not impacted by the increase in temperature, showing good stability of the ready-to-use compositions over time.

Claims

Demands

1. A concentrated, clear, homogeneous liquid cosmetic composition for dilution, comprising: - 25% to 55% of at least one surfactant selected from anionic surfactants, amphoteric surfactants, non-ionic surfactants, or a mixture thereof; - 0.1% to 30% of at least one preservative; - 0.1% to 30% of at least one aqueous phase thickening and / or gelling agent selected from polyethylene glycols such as glycerol fatty acid polyesters or ethoxylated polyglycerols or ethoxylated monosaccharide fatty acid polyesters; or a mixture thereof; and - from 10% to 60% of a cosmetically acceptable solvent chosen from a mixture of water and at least one water-soluble organic solvent, in which the composition comprises less than 30% water by weight relative to the total weight of the composition, and has a viscosity of less than 1300 mPa.s, measured at room temperature (20°C) and room pressure, using a Brookfield RV DV viscometer with a type 4 mobile, at a speed of 12 revolutions / minute, and whose viscosity increases after dilution, the percentages being expressed by weight relative to the total weight of the composition.

2. Composition according to claim 1, characterized in that said at least one preservative agent is selected from organic acids or one of their salts; glycol ethers; halogenated preservatives; aldehydes; alcohols; cationic agents; essential oils; natural or synthetic antioxidants; organic or inorganic UV filters; or a mixture thereof.

3. Composition according to claim 1 and claim 2, characterized in that said at least one water-soluble organic solvent is selected from monoalcohols and polyols such as ethyl alcohol, isopropyl alcohol, propyl alcohol, benzyl alcohol, phenylethyl alcohol, glycerin; glycols or glycol ethers such as monomethyl, monoethyl, and monobutyl ethers of ethylene glycol, propylene glycol or its ethers such as propylene glycol monomethyl ether, butylene glycol, hexylene glycol, dipropylene glycol and alkyl ethers of diethylene glycol such as diethylene glycol monoethyl ether or diethylene glycol monobutyl ether; or a mixture of these.

4. Composition according to any one of claims 1 to 3, characterized in that said at least one aqueous phase thickening and / or gelling agent is an ethoxylated monosaccharide fatty acid polyester selected from ethoxylated glucoside fatty acid polyesters, preferably from ethoxylated methyl-glucoside fatty acid diesters.

5. Concentrated cosmetic composition according to any one of claims 1 to 4 or ready-to-use cosmetic composition according to claim 5 or claim 6, characterized in that they have a stability greater than one month, preferably greater than twelve months, more preferably greater than twenty-four months.

6. Method of preparing a ready-to-use cosmetic composition, comprising a step of diluting the concentrated cosmetic composition according to any one of claims 1 to 4 in a predefined volume of water, and a step of stirring the resulting mixture, characterized in that the dilution is carried out in a suitable container such as a jar, a bottle, a vial or a flask, at a temperature from 15°C to 40°C, preferably from 17°C to 30°C, and in that the step of stirring the resulting mixture consists of a simple manual stirring of said container, carried out by a user for a time of less than two minutes, preferably less than one minute.