Cosmetic composition comprising acetylated hyaluronic acid

Abstract

The present invention relates to a cosmetic composition comprising ethanol, at least one acetylated hyaluronic acid and at least one olfactive compound. The composition of the invention is particularly designed for a use as a spray and can be used as perfume, antiaging care or as a skin moisturizing agent. The invention also concerns a pump bottle comprising said cosmetic composition, as well as a process for the preparation of said cosmetic composition.

Description

[0001] COSMETIC COMPOSITION COMPRISING ACETYLATED HYALURONIC ACID FIELD OF INVENTION [1] The present invention relates to a cosmetic composition comprising ethanol, at least one acetylated hyaluronic acid and at least one olfactive compound. The composition of the invention is particularly designed for a use as a spray and can be used as perfume, anti-aging care or as a skin moisturizing agent. The invention also concerns a pump bottle comprising said cosmetic composition, as well as a process for the preparation of said cosmetic composition. BACKGROUND OF INVENTION [2] On daily basis, a great number of people use cosmetic products. Self-care and wellness are more and more important. Thus, the cosmetic industry continues expanding worldwide, especially in a society where appearance to others or to ourselves has an important place. [3] Fragrance compositions or perfumes are present in many cosmetic products to neutralize or hide strong and / or unpleasant smell of raw basic materials. [4] In addition, fragrances or perfumes are used as a source of seduction: perfumes accompany clothes and a particular scent often says a lot about your personality and your social rank. Numerous fragrance compositions or perfumes have been developed comprising various ingredients to modify the properties of the compositions. [5] Hyaluronic acid is a natural polymer present in the human body. Due to its moisturizing and repulping properties, this compound is used in many cosmetic compositions (EP 2099426, CN 103655360, CN 104207995). In addition to these properties, some fragrance compositions also comprise hyaluronic acid for example to entrap the scent (EP 179070), thus leading to a persistent fragrance effect. [6] Cosmetic fragrance compositions mainly comprise perfume oil or perfume concentrate, also called fragrance, and more generally olfactive compound(s), and alcohol. Hyaluronic acid is poorly soluble in alcohol. Its use in composition comprising high alcohol content requires the addition of other components such as solubilizers, polyols or solvent ingredients with dispersing properties to avoid precipitate formation and afford a homogeneous solution. These criteria are particularly of importance when the cosmetic fragrance or the perfume is meant to be used as a spray. [7] Therefore, there is a need to develop a cosmetic composition, and more particularly a cosmetic fragrance composition or a perfume, comprising hyaluronic acid, said cosmetic composition having properties and characteristics suitable for a use as a spray. SUMMARY [8] The invention relates to a cosmetic composition comprising: - at least 70% by weight of ethanol, relative to the total weight of the composition, - at least one acetylated hyaluronic acid, and - 5 to 30% by weight of at least one olfactive compound. [9] Advantageously, the content of acetylated hyaluronic acid ranges from 0.001 to 5% by weight, preferably from 0.005 to 3% by weight, more preferably from 0.01 to 2% by weight, and better still from 0.02 to 1% by weight, relative to the total weight of the composition.

[0010] Advantageously, the degree of acetylation of acetylated hyaluronic acid ranges from 10 to 100%, preferably from 15 to 100%, 20 to 100%, 25 to 99.5%, 50 to 99%, 75 to 98.5%, 80 to 98% and more preferably from 90 to 98% or from 91%[Icosa87#1]to 98%.

[0011] Advantageously, the molecular weight of the acetylated hyaluronic acid ranges from 5 to 500 kDa, preferably from 5 to100 kDa, preferably from 6 to 50 kDa, more preferably from 7 to 20 kDa, and better still from 8 to 15 kDa.

[0012] Advantageously, the content of ethanol ranges from 70 to 92% by weight, preferably from 70 to 90% by weight, more preferably from 70 to 85% by weight, better still from 70 to 79% by weight, and even better from 70 to 75% by weight, relative to the total weight of the composition.

[0013] Advantageously, the content of the at least one olfactive compound ranges from 5 to 30% by weight, preferably 8 to 20% by weight, preferably from 10 to 18% by weight, and more preferably from 12 to 18% by weight, relative to the total weight of the composition.

[0014] The cosmetic composition of the invention comprises both a high ethanol content and a high olfactive compound content which confers a specific and well defined smell to the mixture and which should therefore remain stable overtime to retain its olfactive properties. The introduction of acetylated hyaluronic in the cosmetic composition should not destabilise the olfactive compounds, in particular when it is intended to be used as a perfume. Typical known composition comprising ethanol, perfume and acetylated hyaluronic acid only contain very low amounts of perfume, i.e. less than 1%, and are not intended as perfumes, meaning that variations in the smell and stability of the olfactive compound is not an important criteria, nor an issue in view of the very low amount used. It is not either obvious that acetylated hyaluronic acid would remain stable in the composition in the presence of a high percentage of olfactive compounds, as would be hyaluronic acid or a salt thereof.

[0015] The cosmetic composition may further comprise at least one glycol, preferably chosen from 2,3-butanediol, propylene glycol, dipropylene glycol, butylene glycol, glycerine, diglycerine and mixtures thereof.

[0016] Advantageously, the content of the at least one glycol, when it is present in the composition, ranges from 0.1 to 8% by weight, preferably from 0.5 to 8% by weight, more preferably from 2.5 to 5% by weight, and even more preferentially from 3 to 5% by weight relative to the total weight of the composition.

[0017] The cosmetic composition may further comprise at least one additional compound chosen from stabilizers, colorants, UV filters and mixtures thereof.

[0018] The cosmetic composition may advantageously be used as anti-aging agent.

[0019] The present invention also relates to the use of the cosmetic composition of the invention as a perfume.

[0020] The present invention also concerns the use of the cosmetic composition of the invention as a skin moisturizing agent.

[0021] The cosmetic composition is preferably suitable for use with a pomp bottle.

[0022] The present invention also relates to a pomp bottle comprising the cosmetic composition of the invention.

[0023] The present invention also concerns a method for the preparation of a cometic composition according to the invention comprising the steps of: a) mixing of at least one acetylated hyaluronic acid and water to obtain an aqueous solution (a), b) mixing of ethanol and the at least one olfactive compound to obtain an alcoholic solution (b), and c) mixing the aqueous solution (a) with the alcoholic solution (b) to obtain the cosmetic composition. DEFINITIONS

[0024] The term “a” and “an” and “the” similar references as used herein refer to both the singular and the plural, otherwise indicated herein or clearly contradicted by context.

[0025] The recitation herein of numerical ranges by endpoints is intended to include all numbers subsumed within that range (e.g., a recitation of 1 to 5 includes 1, 1.25, 1.5, 1.75, 2, 2.45, 2.75, 3, 3.80, 4, 4.32, and 5).

[0026] The term “about” before a figure or number, refers to plus or minus 10% of the face value of that figure or number. In one embodiment, “about”, before a figure or number, refers to plus or minus 5% of the face value of that figure or number.

[0027] The expression “and / or” where used herein is to be taken as specific disclosure of each of the two specified features or components with or without the other. For example, “A and / or B” is to be taken as specific disclosure of each of (i) A, (ii) B and (iii) A and B, just as if each is set out individually herein.

[0028] The term “and” as used herein should in general be construed non-exclusively. For example, an embodiment of “a composition comprising A and B” would typically present an aspect with a composition comprising both A and B.

[0029] "Or" should, however, be construed to exclude those aspects presented that cannot be combined without contradiction.

[0030] The terms “from … to…” and “between … and …” as used herein must be understood as including the boundaries mentioned.

[0031] On the contrary, the expressions “greater than …”, “more than…”, “higher than …”, “less than …” and “lower than …” as used herein do not include the boundaries mentioned unless otherwise indicated with the expression “equal to”.

[0032] The term "comprise" is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded.

[0033] The expression “room temperature” or “ambient temperature”, refers to the temperature within enclosed space at which reactions can be carried out without device to maintain constant temperature. In embodiments, a room temperature or ambient temperature corresponds to a temperature comprised between 15 and 30 °C, preferably between 15 and 25 °C, and more preferably a temperature between 18 to 25 °C.

[0034] The expression “cosmetic product” or “cosmetic composition” refers to chemical compositions derived from natural or synthetical sources, and are particularly designed for personal care in order to enhance or modify one’s appearance.

[0035] Cosmetic compositions, as referred to in the art, are usually classified in three distinct categories: care or skin care, make-up and perfumes. In a preferred embodiment, the cosmetic composition of the invention belongs to the perfume category, i.e. the cosmetic composition of the invention is a perfume composition and preferably a perfume composition with skin care properties.

[0036] In the present invention, the cosmetic product is intended to be placed in contact with the external parts of the human body such as the epidermis, the hair system, the nails, the lips, the teeth and / or the mucous membranes of the oral cavity.

[0037] The aim of the cometic composition according to the invention is cleaning, perfuming, changing or correcting the body odors, and / or changing the appearance.

[0038] The expression “olfactive compounds” refers to a compound or a mixture of olfactive compounds that has a smell or odor. Olfactive compounds can have natural or synthetical origins. Some examples of olfactive compounds are aroma compounds such as fruits, wine, spices, floral scent, but olfactive compounds also encompass perfumes, fragrance oils and essential oils.

[0039] The term “perfume” refers to a substance or composition that emits or diffuses a pleasant, an attractive or agreeable odor. In general, a perfume is a mixture of olfactive compounds and solvents. Preferably, the weight percentage of olfactive compounds in a perfume is comprised between 5 and 30%.

[0040] The term “anti-aging” refers to cosmetic properties of slowing down or reversing the effect of aging such as wrinkles or crinkles formation, appearance of skin marks or stains or skin depigmentation, skin withering and dehydration. An anti-ageing effect is observed when the compositions slows down or at least partially restores skin firmness, skin elasticity and provides a pumpling effect. DETAILED DESCRIPTION

[0041] The invention relates to a cosmetic composition comprising: - at least 70 % by weight of ethanol, relative to the total weight of the composition, - at least one acetylated hyaluronic acid, and - at least one olfactive compound. Alcohol

[0042] The cosmetic composition according to the invention comprises at least 70% by weight of ethanol in relation to the total weight of the composition.

[0043] Ethanol, also called ethyl alcohol, has CAS number 64-17-5.

[0044] According to the invention, ethanol used in the cosmetic composition is pure ethanol, i.e. ethanol with a purity grade of at least 95%. In one embodiment, ethanol has a purity grade of at least 96%, preferably of at least 97%, and more preferably of at least 98%. Advantageously, the purity grade of ethanol is of at least 98%, at least 99%, and even of 100%.

[0045] The cosmetic composition according to the invention comprises at least 70% by weight of ethanol relative to the total weight of the composition, and preferably ethanol has a purity grade of at least 95%. The content of ethanol in the cosmetic composition is preferably lower than 95% by weight, and more preferably lower than 92% by weight relative to the total weight of the composition.

[0046] Advantageously, the content of ethanol in the cosmetic composition ranges from 70 to 92% by weight, preferably from 70 to 90% by weight, more preferentially from 70 to 85% % by weight, and better still from 70 to 79% by weight, relative to the total weight of the cosmetic composition. Even better, the content of ethanol in the cosmetic composition of the invention ranges from 70 to 75 % by weight, relative to the total weight of the composition. Hyaluronic acid

[0047] Hyaluronic acid is a natural polymer found in human body, in particular in the skin, eyes, and joints. This linear polysaccharide is formed by repeating disaccharide units comprising D-glucuronic acid and N-acetyl glucosamine linked by alternating β(1,4) and β(1,3)- glycosidic bonds.

[0048] Hyaluronic acid exhibits excellent physiochemical properties such as biocompatibility, non-toxicity and non-inflammatory features, and possesses interesting viscoelastic behavior.

[0049] In the cosmetic field, hyaluronic acid is used in skin cares such as serum, cream, and facemask for its moisturizing, plumping and healing properties.

[0050] The cosmetic composition of the invention thus comprises at least one acetylated hyaluronic acid. Acetylated hyaluronic acid corresponds to hyaluronic acid bearing an acetyl group of general formula CH3-C(=O)-, in one of the disaccharide units of the hyaluronic acid polymer. The acetyl group can be found on the primary alcohol born by the carbon number 5 and / or on the secondary alcohol born by the carbon number 4 of the N-acetyl glucosamine and / or on the secondary alcohol born by the carbon number 2 and / or on the carbon number 3 of the glucuronic acid according to the IUPAC carbon numbering rules.

[0051] According to the invention, at least one hydroxy group, or alcohol function, of at least one of the disaccharide units of the hyaluronic acid polymer is acetylated. In some embodiments, multiple hydroxy groups of the hyaluronic acid polymer are acetylated. It is understood that acetylation can be found on different hydroxy groups or alcohol functions in the same disaccharide unit and / or in different disaccharide units of the hyaluronic acid polymer.

[0052] The quantity of acetylated hydroxy groups in the hyaluronic acid polymer can be defined by a degree of functionalization and more particularly in this case a degree of acetylation. The later corresponds to the proportion of functionalized or acetylated hydroxy groups with respect to the total number of hydroxy groups found in a hyaluronic acid polymer.

[0053] According to the invention, the degree of acetylation of acetylated hyaluronic acid ranges from 10 to 100%, preferably from 15 to 100%, 20 to 100%, 25 to 99.5%, 50 to 99%, 75 to 98.5%, 80 to 98% and more preferably from 90 to 98% or from to 98%. Preferably, the degree of acetylation of hyaluronic acid is of at least 5%, preferably at least 10%, and more preferably of at least 15%, at least 20%, at least 25%, at least 50%, at least 75% and still preferably at least 80% or at least 90%. Advantageously, the degree of acetylation of hyaluronic acid of the acetylated hyaluronic acid ranges from 50 to 100%, preferably from 80 to 100%, and more preferably from 90 to 100%.

[0054] The cosmetic composition according to the invention thus comprises at least one acetylated hyaluronic acid as defined above.

[0055] In the case of a mixture of acetylated hyaluronic acid polymers, it is understood that said acetylated hyaluronic acid polymers can be identical or different.

[0056] In one embodiment, the hyaluronic acid polymers are identical, that is to say they have the same functional groups, in this case the acetyl groups, or in other words they bear the same chemical groups on the same carbon atoms. In another embodiment, the mixture of hyaluronic acid polymers according to the invention comprises different acetylated hyaluronic acid polymers, thus said molecules having acetyl groups on different carbon atoms.

[0057] As hyaluronic acid is a polymer constituted of molecules having different size, it can be defined by the molecular weight. Advantageously, the acetylated hyaluronic acid according to the invention has a molecular weight lower than or equal to 500 kDa, preferably lower than or equal to 300 kDa, more preferably lower than or equal to 250 kDa, and even more preferably lower than or equal to 200 kDa. Preferably, the acetylated hyaluronic acid has a molecular weight lower than or equal to 150 kDa, more preferably lower than or equal to 100 kDa. Even more preferably lower than or equal to 75 kDa, and better still lower than or equal to50 kDa, lower than or equal to 30 kDa or lower than or equal to 15 kDa.

[0058] Yet, the molecular weight of acetylated hyaluronic acid according to the invention advantageously ranges from 5 to 500 kDa, preferably from 5 to 100 kDa, preferably from 6 to 50 kDa, more preferably from 7 to 20 kDa, and better still from 8 to 15 kDa.

[0059] The content of acetylated hyaluronic acid in the cosmetic composition advantageously ranges from 0.001 to 5% by weight, relative to the total weight of the composition. Preferably, the content of acetylated hyaluronic acid is greater than or equal to 0.002% by weight, more preferably greater than or equal to 0.005% by weight, and more preferably greater than or equal to 0.01% by weight, relative to the total weight of the composition.

[0060] Advantageously, the content of acetylated hyaluronic acid in the cosmetic composition according to the invention ranges from 0.001 to 5% by weight, preferably from 0.005 to 3% by weight, more preferably from 0.01 to 2% by weight, and even more preferably from 0.02 to 1% by weight, relative to the total weight of the composition.

[0061] Advantageously, the content of acetylated hyaluronic acid in the cosmetic composition ranges from 0.01 to 1% by weight, and preferably from 0.01 to 0.8% by weight, more preferably from 0.01 to 0.5% by weight and even more preferably from 0.02 to 0.5% by weight relative to the total weight of the composition.

[0062] Hyaluronic acid in the cosmetic composition or acetylated hyaluronic acid can exist in the form of salts, unless it is fully acetylated. Examples of salts includes sodium, potassium, calcium, magnesium, aluminum, and ammonium. In a preferred embodiment, the acetylated hyaluronic acid is hyaluronic acid. In another preferred embodiment, the acetylated hyaluronic acid is in the form of a salt, and in particular as sodium salt. Hyaluronic acid according to the invention can be natural, synthetic or biosynthetic hyaluronic acid. Acetylated hyaluronic acid can also be purchased from suppliers, as for example Givaudan (such as the product Primalhyal UltraFilter®) or Fujimoto Chemicals Co. (such as the product Acetylated sodium hyaluronate)

[0063] Olfactive compounds

[0064] As used herein the term “olfactive compounds” relates to a compound or a mixture of compounds used to impart an overall pleasant odor profile to a composition, said compounds being diluted with a carrier such as glycol, vegetable oil or mineral oil.

[0065] Examples of olfactive compounds include animal-based, plant-based, and mineral-based natural and synthetic compounds.

[0066] According to the invention, the olfactive compounds consist of a single individual compound or a mixture of compounds. A wide variety of chemicals are known for their olfactive properties and then used therefor. Naturally occurring plant and animal oils and exudates comprising complex mixtures of various chemical components are also commonly known for their olfactive properties. The individual compounds which comprise a known natural oil can be found by reference to Journals commonly used by those skilled in the art such as "Perfume and Flavourist" or "Journal of Essential Oil Research". In addition, some olfactive compounds can be supplied by the fragrance houses as mixtures in the form of proprietary speciality accords.

[0067] Examples of natural or synthetic ingredients that can be used as olfactive compounds in the present invention include, but are not limited to, flower extracts (lavender, lavandin, rose, jasmin, ilang-ilang, chamomile ), stems and leaves (patchouli, geranium, petigrain, eucalyptus, mint, cinnamon, clove, lemon balm, vetiver, fennel), fruits (coriander, aniseed, cumin, juniper, star anise), fruit peel (bergamot, lemon, orange, mandarin, yuzu), roots (angelica, celery, cardamom, iris, acorus, ginger, cardamom, nutmeg, pepper, orris), wood (sandalwood, guaiac, rose cedar, cypress, hinoki), herbs and grasses (tarragon, lemon grass, sage, thyme, basil, rosemary), and resins and balms (galbanum, elemi, benzoin, myrrh, olibanum, opopanax, labdanum).

[0068] As examples of suitable synthetic olfactive compounds mention can be made of benzyl acetate, benzyl benzoate, phenoxyethyl isobutyrate, p-tert-butylcyclohexyl acetate, citronellyl acetate and citrnoellyl formate, geranyl acetate, linalyl acetate, dimethylbenzylcarbinyl acetate, phenylethyl acetate, linalyl benzoate, benzyl formate, ethylmethylphenyl glycinate, alloy cyclohexyl propionate, styralyl propionate, benzyl salicylate, benzylethyl ether, linear alkanals comprising from 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamenaldehyde, hydroxycitronellal, lilial and bud, ionones such as α-isomethylionone and methylcedrylketone, anethol, citronellol, eugenol, isoeugenol, indol, geraniol, linalool, phenylethylalcohol, terpineol, nerol, and terpenes.

[0069] Other examples of suitable olfactive compounds are neroli, niauri, dihydromyrcenol, lyral, phenylethyl alcohol, α-hexylcinnamaldehyde, benzylacetone, cyclamenaldehyde, ambroxane, hedione, sandelice, allylamine glycolate, cyclovertal, betadamascone, geranium, cyclohexyl salicylate, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, terpinyl butyrate, γ-nonalactone acetyl isoeugenol, methyl anisate, chrysanthenone, γ-methyl rionone, hexenyl salicylate, p- methylphenylacetaldehyde, limonene, ocimene, helional, linalyl acetate and geraniol, γ- hexalactone.

[0070] The content of olfactive compounds in the cosmetic composition of the invention is preferably greater than or equal to 1% by weight, preferably greater than or equal to 2% by weight and more preferably greater than or equal to 5% by weight in relation to the total weight of the composition. The content of olfactive compounds is also preferably less than or equal to 30% by weight and preferably less than or equal to 25% by weight based on the total weight of the composition. When the amount of olfactive compounds is too small, a sufficient scent cannot be obtained, and when olfactive compounds are contained excessively, the scent may become too strong.

[0071] Advantageously, the content of olfactive compounds in the cosmetic composition of the present inventions ranges from 3 to 20% by weight, preferably from 5 to 20% by weight, more preferably from 8 to 20% by weight, even more preferably from 10 to 18% by weight, and still better from 12 to 18% by weight, relative to the total weight of the composition. Such amounts of olfactive compounds unambiguously classify the composition as a perfume composition.

[0072] Glycols

[0073] The cosmetic composition according to the present invention may eventually further comprise at least one glycol.

[0074] Glycols are diols in which the hydroxy groups are found on different carbon atoms.

[0075] Glycols suitable according to the present invention are preferably selected from the group consisting of monoethylene glycol, also named ethane-1,2-diol, mono propylene glycol or propane 1,2-diol, 1,3-butanediol, 2,3-butanediol, di-propylene glycol, diethylene glycol, triethylene glycol, butylene glycol, hexylene glycol, glycerine and diglycerine, and mixtures thereof. In a more preferred embodiment, the at least one glycol is selected from 2,3-butanediol, mono propylene glycol, dipropylene glycol, butylene glycol, glycerine, diglyceryne and mixtures thereof. Advantageously, glycol used in the cosmetic composition of the invention is 2,3-butanediol.

[0076] Glycols are commercially available, and can be purchase. When bought, glycols may be formulated as mixtures comprising glycol itself and solubilizer. An example of such glycols are Greendiol® comprising from 90 to 92% by weight of 2,3-butanediol in water.

[0077] Preferably, the content of glycol(s), when they are present in the cosmetic composition is greater than or equal to 1% by weight, and more preferably greater than or equal to 2% by weight in relation to the total weight of the composition. Advantageously, the cosmetic composition comprises glycol(s) in a content less than or equal to 8% by weight relative to the total weight of the composition.

[0078] Advantageously, the content of glycol(s), when they are present in the cosmetic composition according to the invention, ranges from 0.1 to 8% by weight relative to the total weight of the composition. Preferably, the content of glycol(s) in the cosmetic composition ranges from 0.5 to 8% by weight, more preferably from 2.5 to 5% by weight, and better still from 3 to 5% by weight, relative to the total weight of the composition

[0079] Additives

[0080] In addition to the above identified ingredients present in the cosmetic composition, the composition of the invention may eventually further comprise one or more cosmetically acceptable components, also called “additives”, chosen from coloring agents, stabilizers, or UV-filters such as Parsol® 1789, Neo Heliopan® OS and Uvinul® A plus, Tinogard® Q, UV absorber such as Covabsorb®, surfactants, cosmetic active agents such as moisturizers and / or anti-aging ingredients, antioxidants, such as vitamin A, Tinogard® TT, SymDecanoxTMDPG, vitamins, pH adjusters, such as citric acid and triethyl amine, propellants, opacifier, and mixtures thereof.

[0081] It is understood that additives do not adversely affect the effects of the present disclosure, and in particular do not affect the olfactive properties of the composition.

[0082] Depending on the use of the cosmetic composition, the person of ordinary skills in the art will know how to choose the required additives to add to the cosmetic composition.

[0083] The total content of additives, when they are present in the cosmetic composition of the invention, is preferably less than or equal 15% by weight, preferably less than or equal to 10% by weight, and more preferably less than or equal to 5% by weight, relative to the total weight of the composition.

[0084] The cosmetic composition of the invention may eventually further comprise at least one colorant in an amount advantageously ranging from 0.0001 to 0.01% by weight relative to the total weight of the composition. Preferably, the content of colorant(s), when they are present in the cosmetic composition of the invention, ranges from 0.0005 to 0.01% by weight, and in particular is about 0.0008, 0.0009, 0.001, 0.0011, 0.0012 % by weight relative to the total weight of the composition.

[0085] The cosmetic composition of the invention may eventually further comprise at least one stabilizer. Stabilizers allow stability of the olfactive and / or color properties of the composition. Examples of stabilizer suitable according to the present invention are Parsol® 1789, Neo Heliopan® OS and Uvinul® A plus, . Advantageously, the cosmetic composition may comprise at least one stabilizer in a content of less than or equal to 2% by weight, relative to the total weight of the composition. Preferably, the content of stabilizer(s), when they are present in the cosmetic composition of the invention, ranges from 0.1 to 2% by weight, preferably from 0.5 to 2% by weight, more preferably from 0.5 to 1.5% by weight relative to the total weight of the composition. Advantageously, the content of stabilizer(s), when they are present in the cosmetic composition, is of about 0.8% by weight, about 0.9% by weight, about 1% by weight, about 1.1% by weight, or about 1.2% by weight relative to the total weight of the composition.

[0086] Water

[0087] The cosmetic composition of the invention may eventually further comprise water. The content of water, when it is present in the cosmetic composition of the invention is preferably lower than or equal to 20% by weight, and more preferably lower than or equal to 10% by weight, relative to the total weight of the composition.

[0088] Compositions

[0089] In one embodiment, the cosmetic composition according to the invention comprises: - at least 70 % by weight of ethanol, - at least one acetylated hyaluronic acid, the content of acetylated hyaluronic acid ranging from 0.001 to 5% by weight, and - 5 to 30% by weight of at least one olfactive compound, the percentage being in weight relative to the total weight of the composition.

[0090] In one embodiment, the cosmetic composition according to the invention comprises: - at least 70 % by weight of ethanol, - at least one acetylated hyaluronic acid, the content of acetylated hyaluronic acid ranging from 0.001 to 5% by weight, and - at least one olfactive compound, the content of the olfactive compounds ranging from 8 to 20% by weight, the percentage being in weight relative to the total weight of the composition.

[0091] In one embodiment, the cosmetic composition according to the invention comprises: - from 70 to 79% by weight of ethanol, - at least one acetylated hyaluronic acid, the content of acetylated hyaluronic acid ranging from 0.001 to 5% by weight, and - at least one olfactive compound, the content of the olfactive compounds ranging from 5 to 30% by weight, the percentage being in weight relative to the total weight of the composition.

[0092] In one embodiment, the cosmetic composition according to the invention comprises: - from 70 to 79% by weight of ethanol, - at least one acetylated hyaluronic acid, the content of acetylated hyaluronic acid ranging from 0.001 to 5% by weight, - at least one olfactive compound, the content of the olfactive compounds ranging from 5 to 30% by weight, and - at least one glycol, preferably selected among 2,3-butanediol, propylene glycol, dipropylene glycol, butylene glycol, glycerin, diglycerine and mixtures thereof, the percentage being in weight relative to the total weight of the composition.

[0093] In one embodiment, the cosmetic composition according to the invention comprises: - from 70 to 79% by weight of ethanol, - at least one acetylated hyaluronic acid, the content of acetylated hyaluronic acid ranging from 0.001 to 5% by weight, and hyaluronic acid having a degree of acetylation ranging from 50 to 100%, - at least one olfactive compound, the content of the olfactive compounds ranging from 5 to 30% by weight, and - at least one glycol, said glycol preferably selected among 2,3-butanediol, propylene glycol, dipropylene glycol, butylene glycol, glycerin, diglycerine and mixtures thereof, the percentage being in weight relative to the total weight of the composition.

[0094] In one embodiment, the cosmetic composition according to the invention comprises: - from 70 to 79% by weight of ethanol, - at least one acetylated hyaluronic acid, the content of acetylated hyaluronic acid ranging from 0.02 to 1% by weight, and hyaluronic acid having a degree of acetylation ranging from 50 to 100%, - at least one olfactive compound, the content of the olfactive compounds ranging from 12 to 20% by weight, and - at least one glycol, said glycol preferably selected among 2,3-butanediol, propylene glycol, dipropylene glycol, butylene glycol, glycerin, diglycerine and mixtures thereof, the percentage being in weight relative to the total weight of the composition.

[0095] Process for the preparation of the composition

[0096] Another object of the present invention is a process for the preparation of the cosmetic composition comprising the steps of: a) Mixing at least one acetylated hyaluronic acid with water to obtain an aqueous solution (a), b) Mixing ethanol and the at least one olfactive compound to obtain an alcoholic solution (b), and c) Mixing the aqueous solution (a) with the alcoholic solution (b) to obtain the cosmetic composition.

[0097] The at least one acetylated hyaluronic acid is mixed with water to obtain an aqueous solution (a). The reaction is preferably performed at room temperature with a vigorous stirring. In one preferred embodiment, the reaction mixture is stirred at a rotational speed comprised between 100 and 2000 rpm (round per minute), preferably between 200 and 1500 rpm, more preferably between 300 and 1200 rpm, and even more preferably between 500 and 1000 rpm. Advantageously, the mixture comprising the at least one acetylated hyaluronic acid and water is stirred until complete dissolution of the at least one acetylated hyaluronic acid.

[0098] The process for the preparation of the cosmetic composition further comprises a step b) of mixing ethanol and the at least one olfactive compound to obtain the alcoholic solution (b). The mixture is preferably stirred at a room temperature until complete solubilization of the at least one olfactive compound.

[0099] Once the aqueous solution (a) and the alcoholic solution (b) have been prepared, they are mixed to obtain the cosmetic composition (step (c)). Preferably, the mixture is stirred at room temperature for several minutes. In one preferred embodiment, the mixture is stirred from 1 to 60 minutes, preferably from 5 to 50 minutes, more preferably from 5 to 30 minutes, and more preferably from 5 to 20 minutes.

[0100] The process of the invention may further comprise an additional step (d) of addition of glycols when present. Preferably, glycols are added to the cosmetic composition under stirring.

[0101] The process of the present invention may eventually further comprise a step of maceration (step (e)). This step of maceration may preferably be performed at room temperature, for a period preferably ranging from 1 day to 4 weeks, more preferably from 1 week to 3 weeks, and more preferably from 1 to 2 weeks.

[0102] The maceration step can be performed after obtention of the cosmetic composition, i.e. after step (c) and / or optionally after step (d) if glycols are added to the cosmetic composition. The maceration step can also be performed on the alcoholic solution (b), prior to step (c) of mixing the aqueous solution (a) with the alcoholic solution (b).

[0103] The process of the present invention may eventually further comprise a step of glazing (f) of the cosmetic composition. The glazing step is preferably performed at a temperature lower than or equal to 0 °C, more preferably at a temperature lower than or equal to -5 °C, even more preferably at a temperature lower than or equal to -10 °C, and still better at a temperature lower than or equal to -20 °C.

[0104] The process of the present invention may eventually further comprise a step of filtration (g) of the cosmetic composition. The filtration step can be performed at any stage of the process when required. The person of ordinary skill in the art will know when such step is necessary. In one preferred embodiment, the filtration step is performed after the glazing step (f). In another preferred embodiment, the filtration step is performed on the aqueous solution (a). Yet, in another preferred embodiment, the filtration step is performed on the alcoholic mixture (b), leading to the recovery of the filtrate which is then mixed with the aqueous solution during step (c). Still in another preferred embodiment, the filtration step is performed both on the alcoholic mixture (b) and after the glazing step (f).

[0105] The process of the present invention may eventually further comprise a step of coloring the composition (h), wherein colorants are added to adjust the shade of the cosmetic composition.

[0106] When present, additives are preferably added during step (b).

[0107] In one preferred embodiment, the process for the preparation of the cosmetic composition comprises the steps of: a) Mixing at least one acetylated hyaluronic acid with water to obtain an aqueous solution (a), b) Mixing ethanol and the at least one olfactive compound to obtain an alcoholic solution (b), g) Filtration of the alcoholic solution and recovery of the filtrate, c) Mixing the aqueous solution (a) with the filtrate of alcoholic solution (b), and d) Optional addition of glycols.

[0108] In one preferred embodiment, the process for the preparation of the cosmetic composition comprises the steps of: a) Mixing at least one acetylated hyaluronic acid with water to obtain an aqueous solution (a), b) Mixing ethanol and the at least one olfactive compound to obtain an alcoholic solution (b), c) Mixing the aqueous solution (a) with the alcoholic solution (b), d) Optional addition of glycols, e) Maceration of the composition, f) Glazing of the composition, and g) Filtration of the composition.

[0109] In one preferred embodiment, the process for the preparation of the cosmetic composition comprises the steps of: a) Mixing at least one acetylated hyaluronic acid with water to obtain an aqueous solution (a), b) Mixing ethanol and the at least one olfactive compound to obtain an alcoholic solution (b), e) Maceration of the alcoholic solution (b), f) Glazing of the alcoholic solution (b), g) Filtration of the alcoholic solution (b), c) Mixing the aqueous solution (a) with the alcoholic solution (b), and d) Optional addition of glycols.

[0110] Uses

[0111] The cosmetic composition of the present invention is particularly suitable for use as a liquid composition, and preferably in the form of fine droplets by means of pressurizing devices. The cosmetic composition of the invention is particularly suitable for a use as spray, and in particular for a use as spray with a delivery dose ranging from 70 to 140 µL per spray.

[0112] The cosmetic composition according to the invention can be packaged in bottles. The devices according to the invention are well known to those skilled in the art and include pump bottles, non-aerosol pumps or "atomizers", aerosol containers comprising a propellant and aerosol pumps using compressed air as a propellant.

[0113] Another object of the invention is a bottle provided with a manual pump spraying means and a packaging means containing the cosmetic composition of the invention as described above.

[0114] Cosmetic compositions include, for example, perfumes, eau de parfum, eau de toilette, eau de cologne, creams and emulsions and lotions. According to the invention, the cosmetic composition is preferably selected from perfumes, eau de parfum, eau de toilette, and eau de cologne.

[0115] The cosmetic composition is applied on the skin or the hair of an individual by spraying the skin or the hair of the individual. The composition may be applied to clothing as well, it is preferred to apply it directly to the skin.

[0116] The cosmetic composition of the invention can be used as a perfume, skin moisturizing agent and / or as anti-aging care. Thanks to the presence of active ingredients such as acetylated hyaluronic acid and glycols, the cosmetic composition of the invention exhibits moisturizing properties as well anti-aging effect with an improvement in skin firmness, skin elasticity and a pumpling effect.

[0117] The cosmetic composition of the invention can then be used as anti-aging composition and / or as a moisturizing composition. In a preferred embodiment, the cosmetic composition of the invention is a perfume composition with skin care properties. EXAMPLES

[0118] The present invention is further illustrated by the following examples. Example 1: Solubility analysis 1) Compositions Compositions A1-A3 according to the present invention were prepared from the ingredients whose contents (% by weight relative to the total weight of the composition) are reported in table 1 below. Table 1 A1 A2 A3 Ethanol 75 75 75 Acetylated hyaluronic acid (PUF)10.15 0.2 - Acetylated hyaluronic acid (FJ)2- - 0.03 Olfactive compounds 16 16 16 Water Qsp 100 Qsp 100 Qsp 1001Primalhyal UltraFilter® supplied by Givaudan (acetylation50-100%)2Acetylated sodium hyaluronate supplied by Fujimoto (acetylation: 23-29%) 2) Protocol Acetylated hyaluronic acid was mixed with water to afford an aqueous solution. The aqueous solution was then added to a mixture of ethanol and olfactive compounds to afford cosmetic composition A1-A3. The clarity and the stability of the compositions A1-A3 thus obtained were determined visually. The absence of a precipitate in solution or a veil attest of the stability of the compositions. 3) Results No precipitate was observed after preparation of each composition. Compositions A1-A3 were clear solutions and no veil was observed even after 7 days. The cosmetic composition of the present invention is therefore clear and remains stable over time. Example 2: Stability analysis 1) Compositions Compositions A2, A4 and A5 according to the present invention and the comparative composition B1 were prepared according to the ingredients whose contents (% by weight relative to the total weight of the composition) are reported in table 2 below. Table 2 A2 A4 A5 B1 invention invention invention comparative Ethanol 75 75 70 75 Acetylated hyaluronic acid 1 0.2 0.2 - - (PUF) Acetylated hyaluronic acid (FJ)2- - 0.03 - Hyaluronic acid (Primalhyal 3 - - - 0.05 300) Olfactive compounds 16 16 15 16 Greendiol® (2,3-Butanediol)4- 2 4 2 Diglycerine - 1.5 - 1.5 Water Qsp 100 Qsp 100 Qsp 100 Qsp 1001Primalhyal UltraFilter® supplied by Givaudan (acetylation50-100%)2Acetylated sodium hyaluronate supplied by Fujimoto (acetylation: 23-29%)3Primalhyal 300® supplied by Givaudan (acetylation: 0%)4Greendiol® supplied by GS Caltex 2) Protocol Acetylated hyaluronic acid or hyaluronic acid was mixed with water to afford an aqueous solution. The aqueous solution was then added to a mixture of ethanol and olfactive compounds, before addition of 2,3-Butanediol and diglycerine (for compositions A4 and B1). The clarity and the stability of the compositions thus obtained were determined visually. The absence of a precipitate in solution or a veil attest of the stability of the compositions. 3) Results Compositions A2-A5, containing acetylated hyaluronic acid, were clear solutions and no veil was observed even after 7 days. In comparison, a white precipitate was observed for comparative composition B1. Acetylation of hyaluronic acid leads to its solubilization in cosmetic compositions comprising more than 70% by weight of ethanol, even in absence of solubilizer. Acetylation of hyaluronic acid allows the obtention of a clear composition that remains stable over time and that can be used as a perfume. Example 3: Compositions comprising natural or synthetic olfactive compounds 1) Compositions Compositions A6-A8 according to the present invention were prepared according to the ingredients whose contents (% by weight relative to the total weight of the composition) are reported in table 3 below. Compositions A6, A7 and A8 comprise a mixture of natural and synthetic olfactive compounds. Composition A6 comprises around 50% of synthetic olfactive compounds and 50% of natural olfactive compounds. Composition A7 comprises a majority of natural olfactive compounds, while composition A8 comprises a majority of synthetic olfactive compounds. Table 3 A6 A7 A8 Ethanol 75 71 74 Acetylated hyaluronic acid 0.2 0.2 0.2 (PUF)1Olfactive compounds 15 20 8.5 / 8.5 Greendiol® (2,3-Butanediol)22 2 2 Diglycerine 1.5 1.5 1.5 Water Qsp 100 Qsp 100 Qsp 1001Primalhyal UltraFilter® supplied by Givaudan (acetylation50-100%)2Greendiol® supplied by GS Caltex 2) Protocol Compositions A6-A8 were prepared according to the following protocol: Ethanol was mixed with the olfactive compounds in the presence of a small quantity of water. The mixture was cooled down to 0 °C and filtered to afford an alcoholic mixture. An aqueous solution comprising acetylated hyaluronic acid and water was added to the alcoholic mixture, followed by the sequential addition of 2,3-Butanediol and diglycerine. The clarity and the stability of the compositions thus obtained were determined visually. The absence of a precipitate in solution or a veil attest of the stability of the compositions. 3) Results Compositions A6-A8 thus obtained were clear directly after preparation and remained stable for 7 days as no precipitate or veil was observed. The cosmetic composition of the present invention, comprising acetylated hyaluronic acid, is therefore clear and remains stable over time, whatever the nature and / or the content of olfactive compounds. Example 4: Process study for the preparation of cosmetic composition 1) Compositions Compositions A9-A12 according to the present invention and the comparative composition B2 were prepared according to the ingredients whose contents (% by weight relative to the total weight of the composition) are reported in table 4 below. Table 4 A9 A10 A11 A12 B2 Ethanol 72 72 72 72 72 Olfactive Mixture C 15 15 15 15 15 compounds Water 4 8.8 4 4 4 Mixture D Acetylated 0.2 0.2 0.4 0.1 - hyaluronic acid (PUF)1Water 4.8 - 4.6 4.9 5 Greendiol® (2,3- 4 4 4 4 4 Butanediol)21Primalhyal UltraFilter® supplied by Givaudan (acetylation50-100%)2Greendiol® supplied by by GS Caltex 2) Protocols Compositions A9-A12 were prepared with or without a maceration and / or a filtration step at different stages of the following processes: General protocol: The alcoholic mixture C was prepared by mixing ethanol, the olfactive compounds and water as defined in table 4. In parallel, the mixture D was prepared by mixing acetylated hyaluronic acid and water as defined in table 4. Composition A9 – protocol a: Mixtures C9 and D9 were prepared according to the general protocol mentioned above. The aqueous mixture D9 was added to the alcoholic mixture C9, before the addition of 4% of Greendiol®. The composition was finally macerated for 2 weeks at room temperature, cooled down to -20 °C and filtered to afford the cosmetic composition A9a. Composition A9 – protocol b: Mixtures C9 and D9 were prepared according to the general protocol mentioned above. However, mixture C9 was macerated for 2 weeks before being cooled down to -20°C and filtered. The aqueous mixture D9 was then added to the filtered mixture C9, before the addition of 4% of Greendiol® to afford the cosmetic composition A9b. Composition A10: Mixtures C10 was prepared according to the general protocol mentioned above. Hyaluronic acid was then added, followed by the addition of 4% of Greendiol®. The composition was finally filtered to afford the cosmetic composition A10. A11: Mixtures C11 and D11 were prepared according to the general procedure mentioned above. The aqueous mixture D11 was added to the alcoholic mixture C11, before the addition of 4% of Greendiol®. The composition was finally macerated for 2 weeks at room temperature, cooled down to -20 °C and filtered to afford the cosmetic composition A11. Mixtures C12 and D12 were prepared according to the general procedure mentioned above. The aqueous mixture D12 was added to the alcoholic mixture C12, before the addition of 4% of Greendiol®. The composition was finally macerated for 2 weeks at room temperature, cooled down to -20 °C and filtered to afford the cosmetic composition A12. The compositions A9a, A9b, A10, A11, A12 and B2 thus obtained were then left at room temperature for 2 weeks and up to 3 months. The clarity and the stability of the compositions were determined visually. The absence of a precipitate in solution or a veil attest of the stability of the compositions. HPLC analysis was also performed for each composition after 2 weeks and 1 month storage. 3) Results Compositions A9a, A9b, A10, A11 and A12 thus obtained were clear directly after preparation and remained olfactory stable even after storage at room temperature for 2 weeks, 1 month or even 3 months. The cosmetic composition of the present invention is clear and is considered as stable over time, even after 3 months storage at ambient temperature. In addition, HPLC analysis of composition A9a, A9b, A10, A11 and A12 confirmed the presence of acetylated hyaluronic acid in the cosmetic composition in its original content, even after 6 months storage at ambient temperature. Filtration of the aqueous mixture D comprising hyaluronic acid or filtration of the final composition does not alter the content of acetylated hyaluronic acid in the composition. Example 5: Compositions comprising UV filters 1) Compositions Compositions A13 and comparative example B3 according to the present invention were prepared according to the ingredients whose contents (% by weight relative to the total weight of the composition) are reported in table 5 below. Table 5 A13 B3 Ethanol 72 72 Acetylated hyaluronic acid 0.2 - (PUF)1Olfactive compounds 15 15 Parsol 1789® 0.2 0.2 Uvinul® 0.1 0.1 Tinogard® Q 0.035 0.035 Greendiol® (2,3-Butanediol)24 4 Water Qsp 100 Qsp 1001Primalhyal UltraFilter® supplied by Givaudan (acetylation50-100%)2Greendiol® supplied by GS Caltex 2) Protocol Aqueous mixtures were prepared by solubilization of acetylated hyaluronic acid in water. In parallel, alcoholic mixtures were prepared via the addition of olfactive compounds, in presence of UV filters (Parsol 1789®, Uvinul® and Tinogard® Q) in ethanol. The aqueous mixtures were added to their respective alcoholic mixture before the addition of 4% 2,3-Butanediol. The clear solution was macerated for 2 weeks at ambient temperature, cooled down to -20°C and then filtered (filter KS2000) to afford compositions A13 and B3. Compositions A13 and B3 were then left at ambient temperature for 1 and 2 months. The clarity and the stability of the compositions were determined visually. The absence of a precipitate in solution or a veil attest of the stability of the compositions. 3) Results No precipitate was observed after preparation of each composition. Compositions A13 and B3 thus obtained were clear and remained stable even after storage at room temperature for 1 and 2 months. After 1 month, the composition A13 was slightly yellow compared to B3, whereas the olfactive characteristics of both compositions were not altered. Composition A13 was then inserted in a pump bottle, delivering a dose of 70 to 140 µL per spray when spraying the composition. HPLC analysis of the sprayed composition confirmed the presence of acetylated hyaluronic acid with a content of 0.2%. The composition of the present invention can thus be used as a perfume that remains stable over time. Example 6: Use as moisturizing agent 1) Compositions The cosmetic composition A15 according to the present invention and the comparative composition B4 were prepared according to the ingredients whose contents (% by weight relative to the total weight of the composition) are reported in table 6 below. Table 6 A15 B4 Ethanol 72 72 Acetylated hyaluronic acid 0.2 - (PUF)1Olfactive compounds 15 15 2,3-Butanediol24 4 Water Qsp 100 Qsp 1001Primalhyal UltraFilter® supplied by Givaudan (acetylation50-100%)2Greendiol® supplied by GS Caltex 2) Protocol Compositions A15 was prepared according to the following protocol: An aqueous mixture was prepared by solubilization of acetylated hyaluronic acid in water. In parallel, an alcoholic mixture was prepared via the addition of olfactive compounds in ethanol. The aqueous mixture was then added to the alcoholic mixture before the addition of 4% 2,3-Butanediol. The clear solution was macerated for 2 weeks at ambient temperature, cooled down to -20°C and then filtered (filter KS2000) to afford compositions A15. Comparative composition B4 was prepared following the same protocol in absence of acetylated hyaluronic acid. Compositions A15 and B4 thus obtained were then applied on three zones on the forearms of 10 volunteers. Two zones, each zone is treated by one studied product A15 or B4 and one non-treated zone being the control. Skin hydration was measured before the products application (T0) and over 2, 4, 8 and 12 hours using Corneometer®. 3) Results The formula A15 showed moisturizing effect over 12 hours for all subjects. An overall increase of 12% hydration was instrumentally measured after 8 hours, and an increase of 10% hydration was instrumentally measured after 12 hours. The formula B4 considered as a placebo without hyaluronic acid showed moisturizing effect after 8 hours for all subjects with an increase of 12% hydration. Even if there is no statistical difference between B3 and A15, the A15 formula showed a better moisturizing effect. Example 7: Use as improve skin’s firm and elasticity agent Composition A15 according to the invention was prepared according to the ingredients disclosed in table 6 and to the protocol described in example 6 hereabove. 2) Protocol Compositions A15 thus obtained was then applied once a day in the morning, by 3 sprays on the chest (1 on the left, 1 on the right and 1 in the middle) of 22 volunteers. Measures were performed on the chest with a Cutometer® at day 0 (D0), day 14 (D14) and day 28 (D28). 3) Results After 28 days, an increase of 9% of firmness was measured for all subjects. Skin elasticity was also improved with an increase of 12% of elasticity after 14 days, and an increase of 16% after 28 days for all subjects. In parallel, an increase of9% of suppleness and an increase of 20% of tonicity were measured after 14 days for all subjects. Example 8: Use as softness and plumping effect agent Composition A15 according to the invention was prepared according to the ingredients disclosed in table 6 and to the protocol described in example 6 hereabove. 2) Protocol Compositions A15 thus obtained was then applied once a day in the morning, by 3 sprays on the chest (1 on the left, 1 on the right and 1 in the middle) of 22 volunteers. Scoring was performed by a beautician at day 0 (D0), day 14 (D14) and day 28 (D28). 3) Results An increase of the softness of the skin of 10% was evaluated after 28 days and a global positive plumping effect of 4% at day 14 and of 7% at day 28 also reached significant evaluation.

Claims

CLAIMS 1. A cosmetic composition comprising: - at least 70% by weight of ethanol, relative to the total weight of the composition, - at least one acetylated hyaluronic acid, and - 5 to 30% by weight of at least one olfactive compound.

2. Cosmetic composition according to claim 1, wherein the content of acetylated hyaluronic acid ranges from 0.001 to 5% by weight, preferably from 0.005 to 3% by weight, more preferably from 0.01 to 2% by weight, and better still from 0.02 to 1% by weight, relative to the total weight of the composition 3. Cosmetic composition according to any one of claims 1 to 3, wherein the degree of acetylation of acetylated hyaluronic acid ranges from 10 to 100%, preferably from 50 to 99.5%, and more preferably from 80 to 99%.

4. Cosmetic composition according to any one of claims 1 to 3, wherein the molecular weight of the acetylated hyaluronic acid ranges from 5 to 500 kDa, preferably from 5 to 100 kDa, more preferably from 6 to 50 kDa, more preferably from 7 to 20 kDa and betterstill from 8 to 15 kDa.

5. Cosmetic composition according to any one of claims 1 to 4, wherein the content of ethanol ranges from 70 to 92% by weight, preferably from 70 to 90% by weight, more preferably from 70 to 85% by weight, better still from 70 to 79% by weight, and even better from 70 to 75% by weight, relative to the total weight of the composition.

6. Cosmetic composition according to any one of claims 1 to 5, wherein the content of the at least one olfactive compound ranges from 8 to 20% by weight, preferably from 10 to 18% by weight, and more preferably from 12 to 18% by weight, relative to the total weight of the composition.

7. Cosmetic composition according to any one of claims 1 to 6, wherein the composition further comprises at least one glycol, preferably chosen from 2,3-butanediol, propylene glycol, dipropylene glycol, butylene glycol, glycerine, diglycerine and mixtures thereof.

8. Cosmetic composition according to claim 8, wherein the content of the at least one glycol ranges from 0.1 to 8% by weight, preferably from 0.5 to 8% by weight, more preferably from 2.5 to 5% by weight, and even more preferentially from 3 to 5% by weight relative to the total weight of the composition.

9. Cosmetic composition according to any one of claims 1 to 8, wherein the composition further comprises at least one additional compound chosen from stabilizers, colorants, UV filters and mixtures thereof.

10. Cosmetic composition according to any one of claims 1 to 9 for use as anti-aging agent.

11. Use of a cosmetic composition according to any one of claims 1 to 10 as a perfume.

12. Use of a cosmetic composition according to any one of claims 1 to 10 as a skin moisturizing agent.

13. Cosmetic composition according to any one of claims 1 to 10, wherein the composition is suitable for use with a pomp bottle.

14. Pomp bottle comprising a cosmetic composition according to any one of claims 1 to 10.

15. Method for the preparation of a cometic composition according to any one of claims 1 to 10 comprising the steps of: a) mixing of at least one acetylated hyaluronic acid and water to obtain an aqueous solution (a), b) mixing of ethanol and the at least one olfactive compound to obtain an alcoholic solution (b), and c) mixing the aqueous solution (a) with the alcoholic solution (b) to obtain the cosmetic composition.

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