Fragrance compositions

Abstract

The present disclosure relates to the use of humectants as fragrance modulators in fragrance compositions, such as those formulated as eaux de toilette, eaux de parfum, colognes, body mists, and the like.

Description

[0001] Firmenich SA

[0002] FRAGRANCE COMPOSITIONS

[0003] Field of the Disclosure

[0004] The present disclosure relates to the field of perfumery. More particularly, the present disclosure relates to the use of humectants as fragrance modulators in fragrance compositions, such as those formulated as eaux de toilette, eaux de parfum, colognes, or body mists.

[0005] Background of the Disclosure

[0006] The use of perfumes by humans to provide a pleasant aroma on skin has been known since ancient times. However, it has only been recognized in modern times that a perfume’s scent may differ from one person to the next due to the differences in skin type. As a result of people’s unique skin types, a perfume may release certain fragrance notes, particularly low volatility notes, at different rates, resulting in variable performance from one person to another. The fragrance performance and long-lastingness of perfumes are different on dry skin compared to that of well- hydrated skin. Particularly, the performance of low volatility notes tends to be suppressed on dry skin compared to well-hydrated skin.

[0007] Fragrance modulators, or fixatives, that modulate fragrance performance are known. While these traditional fixatives extend the long lastingness of the more volatile notes, they do so by suppressing their release rates. At the same time, the release rate of low volatility fragrance notes is also suppressed, which is not the desired effect, particularly for dry skin.

[0008] Therefore, there is an ongoing need for ways to modulate fragrance performance to be constant from one person to another. The present disclosure seeks to provide a strategy to mitigate the variability of fragrance performance resulting from variable skin types thus providing fragrance performance that is independent of skin type. Firmenich SA

[0009] Summary of the Disclosure

[0010] The following aspects of the present disclosure seek to address one or more of the problems described hereinabove.

[0011] In a first aspect, the present disclosure relates to a composition comprising: a) a perfume mixture comprising at least one perfumery raw material, b) at least one humectant, c) optionally, a Ci-Ce alkyl alcohol, and d) water.

[0012] In a second aspect, the present disclosure relates to a method for modulating the release rate of low volatility notes of a composition on a surface, the composition comprising a perfume mixture comprising at least one perfumery raw material, optionally a Ci-Ce alkyl alcohol, and water, the method comprising a) adding an effective amount of at least one humectant to the composition and b) applying the composition formed in step a) to the surface.

[0013] In a third aspect, the present disclosure relates to use of a humectant to modulate the release rate of low volatility notes of a composition on a surface, the composition comprising a perfume mixture comprising at least one perfumery raw material, optionally a Ci-Ce alkyl alcohol, and water.

[0014] Brief Description of the Figures

[0015] FIG. 1 shows the levels of certain perfumery raw materials measured by GC / MS on a dry skin panelist after a 4-hour drydown of a control fragrance (left bar) and of a composition according to some aspects of the present disclosure (right bar).

[0016] FIG. 2 shows the levels of certain perfumery raw materials measured by GC / MS on a normal skin panelist after a 4-hour drydown of a control fragrance (left bar) and of a composition according to some aspects of the present disclosure (right bar). Firmenich SA

[0017] FIG. 3 shows the levels of certain perfumery raw materials evaluated by dynamic headspace analysis of a control fragrance (left bar), of a comparative fragrance (middle bar) and of a composition according to some aspects of the present disclosure (right bar).

[0018] Detailed Description

[0019] As used herein, the terms “a”, “an”, or “the” means “one or more” or “at least one” unless otherwise stated.

[0020] While compositions and methods are described in terms of “comprising,” “containing,” or “including” various components or steps, the compositions and methods can also “consist essentially of” or “consist of” the various components, substances and steps. As used herein the term “consisting essentially of” shall be construed to mean including the listed components, substances or steps and such additional components, substances or steps which do not materially affect the basic and novel properties of the composition or method. In some embodiments, a composition in accordance with embodiments of the present disclosure that “consists essentially of” the recited components or substances does not include any additional components or substances that alter the basic and novel properties of the composition.

[0021] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of skill in the art to which this specification pertains.

[0022] It should be understood that any numerical range recited herein is intended to include all sub-ranges subsumed therein. For example, a range of “1 to 10” is intended to include all sub-ranges between and including the recited minimum value of 1 and the recited maximum value of 10; that is, having a minimum value equal to or greater than 1 and a maximum value of equal to or less than 10. Because the disclosed numerical ranges are continuous, they include every value between the minimum and maximum values. Unless expressly indicated otherwise, the various numerical ranges specified in this application are approximations. Firmenich SA

[0023] As used herein, and unless otherwise indicated, the term “about” or “approximately” means an acceptable error for a particular value as determined by one of ordinary skill in the art, which depends in part on how the value is measured or determined. In certain embodiments, the term “about” or “approximately” means within 1 , 2, 3, or 4 standard deviations. In certain embodiments, the term “about” or “approximately” means within 50%, 20%, 15%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1 %, 0.5%, or 0.05% of a given value or range.

[0024] Throughout the present disclosure, various publications may be incorporated by reference. Should the meaning of any language in such publications incorporated by reference conflict with the meaning of the language of the present disclosure, the meaning of the language of the present disclosure shall take precedence, unless otherwise indicated.

[0025] Throughout the present disclosure, various chemical names and structures may be recited. Unless otherwise stated, any stereoisomers, such as enantiomers, diastereomers, anomers, epimers, and the like; and geometric isomers, such as cis / trans or E / Z isomers, of the recited chemical name or structure are contemplated. As would be understood by those of ordinary skill in the art, stereoisomers may possess one stereocenter, giving rise to enantiomers, or more than one stereocenter, giving rise to diastereomers, each stereocenter having one of two different stereochemistries (i.e. , R or S). Enantiomers may be characterized by their ability to rotate oncoming plane-polarized light to the right, designated as dextrorotatory, “(+)” or “D”, or to the left, designated as levorotatory, or “L”. Enantiomers may exist as racemic mixtures or scalemic mixtures. Geometric isomers refer to isomers in which the spatial relationship of atoms around a double bond are different, typically designated E or Z according to conventional understanding in the chemical art. Geometric isomers may also exist as mixtures of E and Z isomers. All of the aforementioned isomeric variations of the chemical names or structures recited herein are included.

[0026] In the first aspect, the present disclosure relates to a composition comprising: a) a perfume mixture comprising at least one perfumery raw material, Firmenich SA b) at least one humectant, c) optionally a Ci-Ce alkyl alcohol, and d) water.

[0027] The composition of the present disclosure is typically a fragrance composition. The perfume mixture comprises at least one perfumery raw material. Typically, the perfume mixture comprises at least 2, at least 3, or at least 4, perfumery raw materials. In some embodiments, the perfume mixture comprises a plurality of perfumery raw materials.

[0028] The terms “perfuming ingredient” or “perfume raw material” may be used interchangeably and refers a compound for use in perfumery, which is used for its ability to smell pleasantly and to be capable of imparting a hedonic effect, or a pleasant odor to the products into which it is incorporated, or to the surfaces, such as skin or hair, to which it is applied, on its own or in admixture with other such ingredients. A perfuming ingredient has the ability to impart or modify, in a positive or pleasant way, the odor of a composition or surface. When the latter has a malodor, the perfuming ingredient may also be capable of covering such malodor so as to render the overall perceived odor pleasant. A “perfuming ingredient” or “perfume raw material” may encompass any suitable perfume raw material for fragrance uses, including materials such as, for example, alcohols, aldehydes, ketones, esters, ethers, acetates, nitriles, terpene hydrocarbons, nitrogenous or sulfurous heterocyclic compounds and essential oils. Naturally occurring plant and animal oils and exudates comprising complex mixtures of various chemical components are also encompassed. The individual perfume raw materials 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”, or listed in reference texts such as the book by S. Arctander, Perfume and Flavor Chemicals, 1969, Montclair, New Jersey, USA and more recently republished by Allured Publishing Corporation Illinois (1994). Additionally, some perfume raw materials are supplied by the fragrance houses as mixtures in the form of proprietary specialty accords. Non-limiting examples of the perfuming ingredients useful herein include pro- fragrances such as acetal pro-fragrances, ketal profragrances, ester pro-fragrances, hydrolyzable inorganic-organic pro-fragrances, and Firmenich SA mixtures thereof. The perfuming ingredient may be released from the pro-fragrances in a number of ways. For example, by way of a non-limiting illustration, the fragrance may be released as a result of simple hydrolysis, or by a shift in an equilibrium reaction, or by a pH-change, or by enzymatic release.

[0029] Fragrance compositions are typically characterized by a greater amount of low volatile perfuming ingredients and lower amounts of the more volatile perfuming ingredients. The low volatile perfuming ingredients are known as “base notes”, while the more volatile perfuming ingredients can be further divided into high volatile perfuming ingredients, identified as “top or head notes”, and medium volatile perfuming ingredients, identified as “middle or heart notes”.

[0030] Without wishing to be bound by any theory, top notes tend to smell citrusy, green, light, fresh, and comprise typically from about 0.1 wt% to 40 wt%, relative to the total weight of the fragrance composition. Top notes tend to evaporate quickly due to their high volatility and are characterized by vapor pressure greater than 0.08 Torr at 22°C (Calculated using Advanced Chemistry Development (ACD / Labs) Software VI 1 .02 (© 1994-2013 ACD / Labs)). Typically, perfumers use top notes to deliver the initial impression of the composition but do not rely on them to contribute much to its overall fragrance profile over time after application.

[0031] Middle or heart notes make up from about 0.1 wt% to about 40 wt%, relative to the total weight of the fragrance composition. Generally, middle / heart notes become dominant to the untrained nose from several minutes after application and can last up to a few hours afterwards. Middle / heart notes are associated with floral aromas (e.g., jasmine, rose), fruity, aromatic, marine or spicy aromas and have an intermediate volatility in the vapor pressure range of 0.0008 to 0.08 Torr at 22°C.

[0032] Base or bottom notes can exist at greater than 30 wt% relative to the total weight of the fragrance composition. Alternatively, base notes can exist from about 45 wt% to about 80 wt% relative to the total weight of the fragrance formulation. Base notes are characterized as animalic, woody, sweet, amber, or musky, not being very volatile and having a vapor pressure less than 0.0008 Torr at 22°C. Firmenich SA

[0033] As used herein, the term “vapor pressure” means the partial pressure in air at a defined temperature for a given chemical species. It defines a chemical species’ desire to be in the gas phase rather than the liquid or solid state. The higher the vapor pressure, the greater the proportion of the material that will, at equilibrium, be found in a closed headspace. It is also related to the rate of evaporation of a perfuming ingredient which is defined in an open environment where material is leaving the system. In one aspect, the vapor pressure is determined according to the reference program Advanced Chemistry Development (ACD / Labs) Software Version 11.02, (© 1994-2013). Examples of methods suitable to determine vapor pressure are disclosed in International Patent Application Publication No. WO 2015 / 089246 A1. Unless otherwise indicated, any vapor pressures described herein refer to vapor pressures determined in the absence of any fragrance modulators.

[0034] In some embodiments, the perfume mixture comprises a plurality of top notes, a plurality of middle notes, and a plurality of bottom notes.

[0035] The amount of the perfume mixture in the composition is not particularly limited. In some embodiments, the perfume mixture is present in an amount of from 0.2 to 50% by weight, relative to the total weight of the composition. In some embodiments, the perfume mixture is present in an amount of from 1 wt% to about 40 wt%, alternatively less than about 25 wt%, alternatively less than about 20 wt%, alternatively less than about 15 wt%, alternatively less than about 10 wt% or alternatively less than about 8 wt%, relative to the total weight of the composition. Alternatively, the perfume mixture is present in an amount of from about 0.2 wt%, 0.3 wt%, 1 wt%, 8 wt% or 10 wt%, to about 15 wt%, 20 wt%, 25 wt%, 30 wt%, 40 wt%, or 50 wt%, relative to the total weight of the composition.

[0036] The humectant of the composition described herein is understood by those of ordinary skill in the art as being hygroscopic substances that form hydrogen bonds with water molecules. The at least one humectant may be any humectant known those of ordinary skill in the art. While humectants are known in cosmetic compositions and appreciated for its ability to draw moisture to a surface, usually skin, and to retain water, the use of humectants for affecting the evaporation of perfumery ingredients and modulating the evaporation profile of certain volatile Firmenich SA components in fragrances is, to the best of the inventors’ knowledge, unknown. Its use as a modulator of the evaporation profile of fragrances, particularly those containing low volatility notes, is a totally unexpected and advantageous contribution to perfumery technology.

[0037] Examples of suitable humectants include, but are not limited to, those selected from the group consisting of panthenol, allantoin, agarose, com glycerides, gluconolactone, lactobionic acid, kombucha, salicylic acid, molasses, seaweed, honey, glycerin, aloe vera, urea and derivatives thereof, such as hydroxyethyl urea; alkanediols, such as 1 ,2-propanediol, 1 ,2-butanediol, 1 ,2-pentanediol, 1 ,2- hexanediol, 1 ,2-heptanediol, 1 ,2-octanediol, 1 ,3-propanediol, 2-methyl-1 ,3- propanediol, and 3-methyl-1 ,3-butanediol; polyethylene glycols, such as PEG-x, wherein x represents the average moles of ethylene oxide; polypropylene glycols, such as dipropylene glycol; triols, such as phytantriol and hexanetriol; alpha hydroxy acids, such as glycolic acid, lactic acid, citric acid, mandelic acid, malic acid, and tartaric acid; sugar alcohols and derivative thereof, such as xylitol, sorbitol, maltitol, erythritol, mannitol, xylitylglucoside, anhydroxylitol, and inositol; saccharides and derivatives thereof, such as lactose, maltose, fructose, and saccharide isomerate; polysaccharides and derivatives thereof, such as hyaluronic acid, sodium hyaluronate and benzyl hyaluronate; peptides and amino acids and derivatives thereof, such as betaine (N,N,N-trimethylglycine), sodium (2S)-5-oxo-2- pyrrolidinecarboxylate (sodium PCA), proline, polyglutamic acid, arginine, copper peptides, lysine, sodium aspartate, elastin, collagen, silk keratin, and glycogen; polyethylene glycol ethers of fatty alcohols, such as isoceteth-x, isolaureth-x, laneth- x, laureth-x, and steareth-x, wherein x represents the average moles of ethylene oxide, silicone copolyols, and any combination thereof. Unless otherwise indicated, x represents the average moles of ethylene oxide contained in the polyethylene glycol (PEG) or the PEG-ylated portion of the molecule mentioned. The average moles of ethylene oxide, x, is generally from 2 to 2000. In some embodiments, x is a value from 4 to 200.

[0038] In a particular embodiment, the at least one humectant comprises a saccharide, typically lactose, maltose, fructose, glucose, galactose, psicose, any isomers thereof, or any mixture thereof. In an embodiment, the at least one humectant comprises Firmenich SA saccharide isomerate. As used herein, “saccharide isomerate” refers to a mixture of sugar isomers, including hexoses and pentoses, such as glucose, fructose, maltose, galactose, and psicose. Saccharide isomerate is commercially available from DSM- Firmenich as PENTAVITIN ®.

[0039] In a particular embodiment, the at least one humectant comprises a polysaccharide or a derivative thereof. As used herein, a polysaccharide refers to a polymer comprising at least 2 saccharides or saccharide derivatives connected by one or more glycosidic bonds. Exemplary saccharides include, but are not limited to, those already described herein. Exemplary saccharide derivatives include, but are not limited to, sugar acids, such as glucuronic acid derived from glucose; amino sugars, such as glucosamine derived from glucose; and sugar amides, such as N- acetylglucosamine. Exemplary polysaccharides include, but are not limited to, chitosan, hyaluronic acid, sodium hyaluronate, benzyl hyaluronate, and the like.

[0040] The amount of the humectant in the composition is not particularly limited. However, in some embodiments, the at least one humectant is present in an amount of less than or equal to 10%, typically less than 3%, by weight, relative to the total weight of the composition. In an embodiment, the at least one humectant is present in an amount of from 0.01 to 10%, typically from 0.5 to 3%, by weight, relative to the total weight of the composition. In a particular embodiment, the at least one humectant is present in an amount of about 1 % by weight, relative to the total weight of the composition.

[0041] The composition of the present disclosure optionally comprises a Ci-Ce alkyl alcohol. In some embodiments, the composition does not comprise a Ci-Ce alkyl alcohol. In some other embodiments, the composition comprises a Ci-Ce alkyl alcohol.

[0042] Exemplary Ci-Ce alkyl alcohols include, but are not limited to, ethanol, methanol, propanol, isopropanol, butanol, and mixtures thereof. In a particular embodiment, the Ci-C6alkyl alcohol is ethanol.

[0043] When present, the amount of the Ci-Ce alkyl alcohol is not particularly limited. In some embodiments, the Ci-Ce alkyl alcohol is present in an amount of from 0.01 to 90%, typically from 1 to 80%, by weight, relative to the total weight of the Firmenich SA composition. In an embodiment, the Ci-Ce alkyl alcohol is present in an amount of from 10 % to 80 %, or even from 25 % to 75 % by weight, relative to the total weight of the composition. Any acceptable quality of the Ci-Ce alkyl alcohol that is compatible and safe for the specific intended use of the composition such as, for example, topical applications of fine fragrance, and is convenient for use in the compositions according to the present disclosure is suitable.

[0044] The composition comprises water. The form of water used is not particularly limited. Water used according to the present disclosure may be deionized and / or demineralized. Suitable water may be water obtained by various extraction methods known to those of ordinary skill in the art, such as distillation, or from natural water sources, such as glaciers, springs, seas and oceans, aquifers, and the like. The amount of the water used in the composition is not particularly limited. However, in an embodiment, water is present in an amount from 0.1 % to 99%, typically 20% to 70%, more typically 40% to 60%, by weight relative to the total weight of the fragrance composition. In another embodiment, water is present in an amount of from 0.01 to 90%, typically from 1 to 80%, by weight, relative to the total weight of the composition.

[0045] The composition described herein may optionally further comprise a perfumery solvent. A detailed description of the nature and type of solvents commonly used in perfumery, herein “perfumery solvent” cannot be exhaustive. However, exemplary solvents include, but are not limited to, solvents such as glycerol, dipropylene glycol and its monoether, 1 ,2,3-propanetriyl triacetate, dimethyl glutarate, dimethyl adipate 1 ,3-diacetyloxypropan-2-yl acetate, diethyl phthalate, isopropyl myristate, Abalyn® (rosin resins, available from Eastman), benzyl benzoate, benzyl alcohol, 2-(2- ethoxyethoxy)-1 -ethanol, triethyl citrate, or mixtures thereof. Naturally derived solvents, like glycerol or various vegetable oils such as palm oil, sunflower oil or linseed oil, may also be used. Other non-limiting perfumery solvents include limonene or other terpenes, isoparaffins such as those known under the trademark Isopar® (origin: Exxon Chemical) or glycol ethers and glycol ether esters such as those known under the trademark Dowanol® (origin: Dow Chemical Company), or Firmenich SA hydrogenated castors oils such as those known under the trademark Cremophor® RH 40 (origin: BASF).

[0046] In some embodiments, the optionally perfumery solvent is a water-miscible solvent. Suitable water-miscible solvents include, but are not limited to, propylene glycol, hexylene glycol, dipropylene glycol, glycerol, isopropylidene glycerol, butylene glycol (1 ,3-butanediol), 1 ,2-pentanediol, 1 ,2-hexanediol, 1 ,3-propanediol, ethyl lactate, and mixtures thereof.

[0047] The amount of the perfumery solvent is not particularly limited. However, in some embodiments, the perfumery solvent is present in an amount from 0% to 50%, typically 0.1 % to 15%, more typically 0.2% to 10%, by weight relative to the total weight of the composition.

[0048] The composition described herein may further comprise a perfuming co-ingredient. As used herein, a perfuming co-ingredient refers to ingredients that impart a hedonic effect, i.e. , used for the primary purpose of conferring or modulating an odor. In other words, such a co-ingredient, to be considered as being a perfuming one, must be recognized by a person skilled in the art as being able to impart or modify in a positive or pleasant way the odor of a composition, and not just as having an odor. Perfuming co-ingredients may impart an additional benefit beyond that of modifying or imparting an odor, such as long-lasting, blooming, malodor counteraction, antimicrobial effect, antiviral effect, microbial stability, or pest control.

[0049] The nature and type of the perfuming co-ingredients do not warrant a more detailed description here, which in any case would not be exhaustive, the skilled person being able to select them on the basis of his general knowledge and according to the intended use or application and the desired organoleptic effect. In general terms, these perfuming co-ingredients belong to chemical classes as varied as alcohols, lactones, aldehydes, ketones, esters, ethers, acetates, nitriles, terpenoids, nitrogenous or sulphurous heterocyclic compounds, and essential oils. Perfuming co-ingredients can be of natural or synthetic origin. Suitable perfumery co- ingredients are in any case listed in reference texts such as the book by S. Firmenich SA

[0050] Arctander, Perfume and Flavor Chemicals, 1969, Montclair, New Jersey, USA, or its more recent versions, or in other works of a similar nature, as well as in the abundant patent literature in the field of perfumery. It is also understood that said co-ingredients may also be compounds known to release, in a controlled manner, various types of perfuming compounds, known as properfume or profragrance.

[0051] The composition described herein may optionally comprise a fragrance modulator different from the humectant.

[0052] Fragrance modulators, also known as fixatives, are agents having the capacity to affect the manner in which the odor, and in particular the evaporation rate and intensity, of the compositions incorporating said modulator can be perceived by an observer or user thereof, over time, as compared to the same perception in the absence of the modulator. In particular, the modulator allows prolonging the time during which their fragrance is perceived.

[0053] Examples of fragrance modulators suitable for use according to the present disclosure include, but are not limited to, caprylyl alcohol, octanol, butyloctanol, isotridecyl alcohol, hexyldecanol, isostearyl alcohol, octyldecanol, octyldodecanol, decyltetradecanol, tetradecyloctadecanol, PPG-20 methyl glucose ether, methyl glucoside polyol; ethyl glucoside polyol; propyl glucoside polyol; isocetyl alcohol; PPG-3 myristyl ether; neopentyl glycol diethylhexanoate; sucrose laurate; sucrose dilaurate, sucrose myristate, sucrose palmitate, sucrose stearate, sucrose distearate, sucrose tristearate, hyaluronic acid disaccharide sodium salt, sodium hyaluronate, propylene glycol propyl ether; dicetyl ether; polyglycerin-4 ethers; isoceteth-5; isoceteth-7, isoceteth-10; isoceteth-12; isoceteth-15; isoceteth-20; isoceteth-25; isoceteth-30; disodium lauroamphodipropionate; hexaethylene glycol monododecyl ether; and their mixtures; neopentyl glycol diisononanoate; cetearyl ethylhexanoate; panthenol ethyl ether, DL-panthenol, N-hexadecyl n-nonanoate, noctadecyl n- nonanoate, a profragrance, cyclodextrin, and any combination thereof.

[0054] The compositions described herein may optionally comprise at least one perfumery adjuvant. Firmenich SA

[0055] The at least one perfumery adjuvant is an ingredient capable of imparting an additional added benefit such as a color, a particular light resistance, chemical stability, etc. A detailed description of the nature and type of adjuvant commonly used in perfuming compositions cannot be exhaustive, but mention is made that said ingredients are well known to a person skilled in the art.

[0056] Exemplary perfumery adjuvants include, but are not limited to, viscosity agents (e.g., surfactants, thickeners, gelling and / or rheology modifiers), stabilizing agents (e.g., preservatives, antioxidant, heat / light and or buffers or chelating agents, such as BHT), coloring agents (e.g., dyes and / or pigments), preservatives (e.g. antibacterial or antimicrobial or antifungal or anti irritant agents), abrasives, skin cooling agents, insect repellants, ointments, vitamins and mixtures thereof.

[0057] The compositions according to the present disclosure may be prepared according to any method known to those of ordinary skill in the art. The ordinarily skilled artisan is perfectly able to design optimal formulations for the desired effect by admixing the above-mentioned components to arrive at the desired composition by applying standard knowledge and concepts known to those of ordinary skill and by utilizing routine optimization methodologies.

[0058] The composition described herein may comprise a solid carrier. The composition described herein or elements of the composition can be chemically or physically bound. In general, such solid carriers are employed either to stabilize the composition, or to control the rate of evaporation of the compositions or of some ingredients. Solid carriers are of current use in the art and a person skilled in the art knows how to reach the desired effect. Suitable solid carriers include, but are not limited to, absorbing gums or polymers or inorganic materials, such as porous polymers, cyclodextrins, dextrins, maltodextrins, wood-based materials, organic or inorganic gels, clays, gypsum talc or zeolites.

[0059] In some embodiments, the compositions may be adsorbed or absorbed on a porous or non-porous substrate in loose powder or compacted form, the substrate being selected from cellulose (paper / cardboard), vermiculite, other industrial absorbents, Firmenich SA perlite, calcium carbonate, pumice, wood, sawdust, ground com cob, ground rice hull, rice hull ash, biochars, starches, modified starches, and mixtures thereof.

[0060] The compositions according to the present disclosure may be combined with encapsulating materials such as polymers to form microcapsules or microparticles, or materials to form liquid delivery systems for the composition. Exemplary liquid delivery systems include, but are not limited to, emulsions, microemulsions, miniemulsions, gels, microgels, anhydrous gels, or dispersions.

[0061] In some embodiments, the composition described herein or one or more elements of the composition, such as the humectant or the perfume mixture, may be encapsulated in at least one microcapsule, typically a plurality of microcapsules, generally in the form of a microcapsule slurry. In some embodiments, the at least one microcapsule is a core-shell microcapsule, which comprises a core surrounded by a shell. Generally, the composition described herein, or one or more elements of the composition, is / are contained in the core. The shell of the microcapsule protects the compounds or compositions from the environment. The shell is generally made of a material that can release the compounds or compositions, typically upon breakage of the shell and / or by diffusion through the shell. Materials and processes for preparing such microcapsules are known to those of ordinary skill in the art.

[0062] The shell of the microcapsule may comprise a material selected from the group consisting of polyurea, polyurethane, polyamide, polyester, poly(meth)acrylate (i.e. polyacrylate and / or polymethacrylate), polysiloxane, polycarbonate, polysulfonamide, polymers of urea and formaldehyde, melamine and formaldehyde, melamine and urea, or melamine and glyoxal and mixtures thereof. The shell can also be hybrid, namely organic-inorganic, such as a hybrid shell composed of at least two types of inorganic particles that are cross-linked, or yet a shell resulting from the hydrolysis and condensation reaction of a polyalkoxysilane macro-monomeric composition.

[0063] In an embodiment, the shell of the microcapsules may be, each independently, selected from the group of am inoplast, polyamide, polyester, polyurea and polyurethane shells and mixtures thereof. Firmenich SA

[0064] In another embodiment, the shell of the microcapsules may comprise an aminoplast copolymer, such as melamine-formaldehyde or urea-formaldehyde or cross-linked melamine formaldehyde or melamine glyoxal.

[0065] In yet another embodiment, the shell of the microcapsules may comprise polyurea, being made from, for example, but not limited to, isocyanate or isocyanate-based monomers and amine or amine-containing crosslinkers, such as guanidine carbonate and / or guanazole. Certain polyurea microcapsules comprise a polyurea wall which is the reaction product of the polymerization between at least one polyisocyanate comprising at least two isocyanate functional groups and at least one reactant selected from the group consisting of an amine (for example a water-soluble guanidine salt and guanidine); a colloidal stabilizer or emulsifier; and an encapsulated perfume. However, the use of an amine can be omitted.

[0066] The colloidal stabilizer includes an aqueous solution of between 0.1 % and 0.4% of polyvinyl alcohol, between 0.6% and 1 % of a cationic copolymer of vinylpyrrolidone and of a quaternized vinylimidazole (all percentages being defined by weight relative to the total weight of the colloidal stabilizer).

[0067] The emulsifier is an anionic or amphiphilic biopolymer. Exemplary emulsifiers include, but are not limited to, those selected from the group consisting of Gum Arabic, soy protein, gelatin, sodium caseinate, and mixtures thereof.

[0068] In an embodiment, the shell of the microcapsules may comprise polyurethane, being made from, for example, but not limited to, polyisocyanate and polyols, polyamide, polyester, and the like.

[0069] In another embodiment, the microcapsules may have a polymeric shell resulting from complex coacervation wherein the shell is possibly cross-linked.

[0070] The core-shell microcapsules may comprise an oil-based core comprising a hydrophobic active, and a composite shell comprising a first material and a second material, wherein the first material and the second material are different, and wherein the first material is a coacervate and the second material is a polymeric material. Firmenich SA

[0071] Generally, the weight ratio between the first material and the second material is comprised between 50:50 and 99.9:0.1 . The hydrophobic active typically comprises the perfume oil or mixture.

[0072] The coacervate may comprise a first polyelectrolyte, typically selected from the group consisting of proteins (such as gelatin), polypeptides, and polysaccharides (such as chitosan), more typically gelatin; and a second polyelectrolyte, typically selected from the group consisting of alginate salts, cellulose derivatives, guar gum, pectinate salts, carrageenan, polyacrylic and methacrylic acid, xanthan gum, and plant gums, such as acacia gum (Gum Arabic), more typically Gum Arabic. The first coacervate material can be hardened chemically using a suitable cross-linker, such as glutaraldehyde, glyoxal, formaldehyde, tannic acid or genipin, or can be hardened enzymatically using an enzyme, such as transglutaminase.

[0073] The second material is a polymeric material, typically selected from the group consisting of polyurea, polyurethane, polyamide, polyester, polyacrylate, polysiloxane, polycarbonate, polysulfonamide, polymers of urea and formaldehyde, melamine and formaldehyde, melamine and urea, and melamine and glyoxal, and mixtures thereof, typically polyurea and / or polyurethane. The second material is present in an amount less than 3 wt.%, typically less than 1 wt.%, based on the total weight of the microcapsule slurry.

[0074] The microcapsule wall material may comprise any suitable resin, such as melamine, glyoxal, polyurea, polyurethane, polyamide, polyester, etc. Suitable resins include the reaction product of an aldehyde, typically formaldehyde or glyoxal, and an amine. Suitable amines include melamine, urea, benzoguanamine, glycoluril, and mixtures thereof. Suitable melamines include, but are not limited to, methylol melamine, methylated methylol melamine, imino melamine, and mixtures thereof. Suitable ureas include dimethylol urea, methylated dimethylol urea, urea-resorcinol, and mixtures thereof. Suitable materials for making may be obtained from one or more of the following companies Solutia Inc. (St Louis, Missouri U.S.A.), Cytec Industries (West Paterson, New Jersey U.S.A.), Sigma-Aldrich (St. Louis, Missouri U.S.A.).

[0075] An exemplary core-shell microcapsule may comprise: Firmenich SA

[0076] - an oil-based core comprising a hydrophobic active,

[0077] - optionally an inner shell made of a polymerized polyfunctional monomer;

[0078] - a biopolymer shell comprising a protein, wherein at least one protein is crosslinked.

[0079] Suitable proteins include, but are not limited to, those selected from the group consisting of milk proteins, caseinate salts (such as sodium caseinate or calcium caseinate), casein, whey protein, hydrolyzed proteins, gelatins, gluten, pea protein, soy protein, silk protein, and mixtures thereof, typically sodium caseinate.

[0080] The protein may comprise sodium caseinate and a globular protein, typically selected from the group consisting of whey protein, beta-lactoglobulin, ovalbumine, bovine serum albumin, vegetable proteins, and mixtures thereof. An exemplary protein comprises a mixture of sodium caseinate and whey protein. An exemplary biopolymer shell comprises a crosslinked protein selected from the group consisting of sodium caseinate and / or whey protein.

[0081] An exemplary microcapsule slurry may comprise at least one microcapsule made of:

[0082] - an oil-based core comprising a hydrophobic active;

[0083] - an inner shell made of a polymerized polyfunctional monomer; typically a polyisocyanate having at least two isocyanate functional groups;

[0084] - a biopolymer shell comprising a protein, wherein at least one protein is crosslinked; and wherein the protein contains typically a mixture comprising sodium caseinate and a globular protein, typically whey protein; and

[0085] - optionally at least an outer mineral layer.

[0086] In some cases, sodium caseinate and / or whey protein is (are) cross-linked protein(s). The weight ratio between sodium caseinate and whey protein is from 0.01 to 100, typically from 0.1 to 10, more typically from 0.2 to 5.

[0087] Another exemplary core-shell microcapsule is a polyamide core-shell microcapsule comprising: Firmenich SA

[0088] - an oil-based core comprising a hydrophobic active, and

[0089] - a polyamide shell comprising or being obtained from:

[0090] • an acyl chloride,

[0091] • a first amino compound, and

[0092] • a second amino compound.

[0093] The polyamide core-shell microcapsule may comprise:

[0094] - an oil-based core comprising a hydrophobic active, and

[0095] - a polyamide shell comprising or being obtained from:

[0096] • an acyl chloride, typically in an amount of from 5 to 98%, more typically from 20 to 98%, most typically from 30 and 85% w / w;

[0097] • a first amino compound, typically in an amount of from 1 % to 50% w / w, more typically from 7 to 40% w / w;

[0098] • a second amino compound, typically in an amount of from 1% to 50% w / w, more typically from 2 to 25% w / w; and

[0099] • a stabilizer, typically a biopolymer, typically in an amount of from 0 to 90%, more typically from 0.1 to 75%, most typically from 1 to 70% w / w.

[0100] Another exemplary polyamide core-shell microcapsule comprises:

[0101] - an oil-based core comprising a hydrophobic active, and

[0102] - a polyamide shell comprising or being obtained from:

[0103] • an acyl chloride,

[0104] • a first amino-compound being an amino acid, typically selected from the group consisting of L-Lysine, L-Arginine, L-Histidine, L- Tryptophane, and any mixture thereof,

[0105] • a second amino-compound, typically selected from the group consisting of ethylene diamine, diethylene triamine, cystamine, and any mixture thereof; and

[0106] • a biopolymer selected from the group consisting of casein, sodium caseinate, bovin serum albumin, whey protein, and any mixture thereof.

[0107] The first amino-compound can be different from the second amino-compound. Firmenich SA

[0108] The preparation of core-shell microcapsules, typically as an aqueous dispersion / slurry, are made according to methods and processes well known by those of ordinary skill in the art.

[0109] In an exemplary method, the microcapsule is a one-shell aminoplast core-shell microcapsule obtained by a process comprising the steps of:

[0110] 1 ) admixing a perfume oil with at least a polyisocyanate having at least two isocyanate functional groups to form an oil phase;

[0111] 2) dispersing or dissolving into water an aminoplast resin and, optionally, a stabilizer to form a water phase;

[0112] 3) preparing an oil-in-water dispersion, wherein the mean droplet size is comprised between 1 and 100 microns, by admixing the oil phase and the water phase;

[0113] 4) performing a curing step to form the wall of said microcapsule; and

[0114] 5) optionally drying the final dispersion to obtain the dried core-shell microcapsule.

[0115] In another exemplary method, the microcapsule is an aminoplast formaldehyde-free microcapsule slurry prepared by a process comprising the steps of

[0116] 1 ) preparing an oligomeric composition comprising the reaction product of, or obtained by reacting together: a. a polyamine component in the form of melamine or of a mixture of melamine and at least one C1-C4 compound comprising two NH2 functional groups; b. an aldehyde component in the form of a mixture of glyoxal, a C4-6 2,2- dialkoxy-ethanal and optionally a glyoxalate, said mixture having a molar ratio glyoxal / C4-6 2,2-dialkoxy-ethanal comprised between 1 / 1 and10 / 1 ; and c. a protic acid catalyst;

[0117] 2) preparing an oil-in-water dispersion, wherein the droplet size is comprised between 1 and 600 microns, and comprising: a. an oil; b. a water medium; Firmenich SA c. at least an oligomeric composition as obtained in step 1 ; d. at least a cross-linker selected amongst: i. C4-C12 aromatic or aliphatic di- or tri-isocyanates and their biurets, triurets, trimmers, trimethylol propane-adduct and mixtures thereof; and / or ii. a di- or tri-oxiran compound of formula:

[0118] Q-(oxiran-2-ylrnethyl)m wherein m is 2 or 3 and Q represents a C2-C6 group optionally comprising from 2 to 6 nitrogen and / or oxygen atoms; e. optionally a C1-C4 compounds comprising two NH2 functional groups;

[0119] 3) heating the dispersion; and

[0120] 4) cooling the dispersion.

[0121] The above process is described in more detail in WO 2013 / 068255.

[0122] In another exemplary method, the microcapsule is a polyamide-based microcapsule prepared by a process comprising the following steps: a) dissolving at least one acyl chloride in a hydrophobic material, typically a perfume to form an oil phase; b) dispersing the oil phase obtained in step a) into a water phase comprising a first amino compound to form an oil-in water emulsion; c) performing a curing step to form polyamide microcapsules in the form of a slurry; wherein a stabilizer is added in the oil phase and / or in the water phase, and wherein at least a second amino-compound is added in the water phase before the formation of the oil-in-water emulsion and / or in the oil-in-water emulsion obtained after step b).

[0123] Examples of processes for the preparation of polyurea and polyureathane-based microcapsule slurries are, for instance, described in WO 2007 / 004166, EP 2300146, and EP 2579976. An exemplary process for the preparation of polyurea or polyurethane-based microcapsule slurries comprises the following steps: Firmenich SA a) dissolving at least one polyisocyanate having at least two isocyanate groups in an oil to form an oil phase; b) preparing an aqueous solution of an emulsifier or colloidal stabilizer to form a water phase; c) adding the oil phase to the water phase to form an oil-in-water dispersion, wherein the mean droplet size is comprised between 1 and 500 pm, preferably between 5 and 50 pm; and d) applying conditions sufficient to induce interfacial polymerization and form microcapsules in form of a slurry.

[0124] The microcapsules may be in the form of a powder, which in particular may be obtained by submitting the microcapsule slurry to a drying step, like spray-drying. Slurries may be spray-dried, typically in the presence of a polymeric carrier material, such as polyvinyl acetate, polyvinyl alcohol, dextrins, natural or modified starch, gum Arabic, vegetable gums, pectins, xanthans, alginates, carrageenans or cellulose derivatives to provide microcapsules in a powder form. It is understood that any standard method known to those of ordinary skill in the art to perform such drying is also applicable.

[0125] For example, other drying methods such as extrusion, plating, spray granulation or fluidized bed processes, or even drying at room temperature using materials (carrier, desiccant) that meet specific criteria, as disclosed in WO 2017 / 134179, may be used. The core-shell microcapsule(s) can also be obtained by using different or more than one encapsulation method.

[0126] The composition of the present disclosure may be formulated as a fine fragrance composition intended for application to a body surface, such as for example, skin or hair, i.e. , to impart a pleasant odor thereto, or cover a malodor thereof. They are generally in the form of perfume concentrates, perfumes, eau de parfums, eau de toilettes, aftershaves, colognes, body splashes, or body sprays. The fine fragrance compositions may be hydroalcoholic (containing both water and alcohol, typically ethanol) or water-based compositions (containing water and water-miscible solvents without ethanol). The composition of the present disclosure may be formulated as a personal care composition intended for application to a body surface, such as for Firmenich SA example, skin or hair. Exemplary personal care compositions include, but are not limited to, facial or body powder, foundation, body / facial oil, mousse, creams (e.g., cold creams), waxes, sunscreens and sunblock, bath and shower gels, lip balms, self-tanning compositions, masks, patches, and the like. The composition of the present disclosure may be formulated as cleaning compositions, fabric care compositions, or home care compositions for use on clothing or other substrates such as hard surfaces (e.g., dishes, floors, countertops). In an embodiment, the composition of the present disclosure is formulated as a fine fragrance composition, typically, as an eau de toilette, eau de parfum, cologne, or body mist.

[0127] In the second aspect, the present disclosure relates to a method for modulating the release rate of low volatility notes of a composition on a surface, the composition comprising a perfume mixture comprising at least one perfumery raw material, optionally a Ci-Ce alkyl alcohol, and water, the method comprising a) adding an effective amount of at least one humectant to the composition and b) applying the composition formed in step a) to the surface.

[0128] The composition and components of the composition are as described hereinabove, and the features are applied mutatis mutandis to the method of the second aspect. It has been discovered that humectants have a surprising ability to affect the evaporation of perfumery ingredients and to modulate the evaporation profile of certain volatile components in fragrances. Their use as modulators of the evaporation profile of fragrances, particularly those containing low volatility notes, is advantageous and unexpected.

[0129] As used herein, modulating the release rate of low volatility notes of a composition on a surface means altering the release rate of low volatility notes of the composition on a surface. Typically, modulating the release rate of low volatility notes of a composition on a surface means increasing the release rate of low volatility notes of the composition on a surface.

[0130] Step a) of adding an effective amount of at least one humectant to the composition can be achieved using any method known to those of ordinary skill in the art. In a suitable method, an effective amount of the at least one humectant is combined with Firmenich SA a composition comprising the perfume mixture, optionally a Ci-Ce alkyl alcohol, and water, and then mixed under stirring.

[0131] The effective amount of the at least one humectant is an amount sufficient to alter the release rate of low volatility notes of the composition on a surface and may be determined using methods known to those of ordinary skill in the art. For example, the humectant may be added to a composition comprising the perfume mixture, optionally a Ci-Ce alkyl alcohol, and water and the fragrance performance evaluated by measuring the levels of the perfumery raw materials detected versus the composition comprising the perfume mixture, optionally a Ci-Ce alkyl alcohol, and water without humectant. In some embodiments, the at least one humectant is added in an amount of less than or equal to 10%, typically less than 3%, by weight, relative to the total weight of the composition with humectant. In an embodiment, the at least one humectant is added in an amount of from 0.01 to 10%, typically from 0.5 to 3%, by weight, relative to the total weight of the composition with humectant. In a particular embodiment, the at least one humectant is added in an amount of about 1 % by weight, relative to the total weight of the composition with humectant.

[0132] Step b) of applying the composition formed in step a) to the surface may be achieved using any known method. Examples include, but are not limited to, spraying, wiping, applying by hand, and the like.

[0133] The surface is not particularly limited and may include skin, hair, clothing, or hard surfaces, such as dishes, floors, countertops, and the like. However, in an embodiment, the surface is skin. In a particular embodiment, the skin is dry skin. When the composition of the present disclosure is applied to skin, the method is non- therapeutic. That is to say, the method of the present disclosure, including the composition, is not used for treating or curing any disease or ailment, but to modulate, typically increase the release rate of low volatility notes of the perfume in the composition to provide fragrance performance that is independent of skin type. Thus, in an embodiment, the release rate of low volatility notes of the composition, typically on dry skin, is similar or equal to the release rate of low volatility notes of the same composition free of humectant on normal skin. Firmenich SA

[0134] Whether skin is dry or normal may be determined using any method or instrumentation known to those of ordinary skill in the art. Skin hydration status may be self-described, evaluated by visual inspection (appears normal, rough, flaky, scaly, cracked, etc.), or determined by analytical means. Analytically, skin hydration can be determined by measuring the electrical properties, such as impedance, conductance, or capacitance, of skin. Any device that measures one or more of such electrical properties is suitable. Exemplary devices include, but are not limited to, Skicon-200 (I.B.S. Co. Ltd., Japan), which measures conductance; Nova Dermal Phase Meter, Model DPM 9003 (Nova, Technology Corp., Gloucester, Mass.), which measures skin surface impedance, and Corneometer CM 825 (Courage + Khasaka, Cologne, Germany), which measures skin capacitance.

[0135] In the third aspect, the present disclosure relates to use of a humectant to modulate the release rate of low volatility notes of a composition on a surface, the composition comprising a perfume mixture comprising at least one perfumery raw material, optionally a Ci-Ce alkyl alcohol, and water.

[0136] The composition and components of the composition are as described hereinabove, and the features are applied mutatis mutandis to the use of the third aspect.

[0137] The compositions, methods, and uses according to the present disclosure are further illustrated by the following non-limiting examples.

[0138] Example 1

[0139] A fragrance composition comprising a fragrance oil (perfume mixture), saccharide isomerate (available from DSM-Firmenich as PENTAVITIN ®) dosed into the total composition at 1 %, ethanol, and water, was evaluated on a panelist self-described as having dry skin (designated “BRKY”) and a panelist self-described as having normal skin (designated “ARKR”). The control fragrance composition was identical to the tested composition, except that it did not contain saccharide isomerate. Fragrance dry downs were conducted with 20 pl of the test sample and of the control sample on each panelist’s skin (test composition on one arm, control on the other arm) for up to 4 hours. The areas of the skin that contained the fragrance were Firmenich SA sampled with a pump apparatus at 125 mL / min for 10 minutes (1.25 liters total). The levels of perfumery raw materials collected were measured by GC / MS.

[0140] FIG. 1 shows the levels of certain perfumery raw materials measured by GC / MS on the dry skin panelist after the 4-hour drydown of the control fragrance (left bar) and of the tested composition (right bar). FIG. 2 shows the levels of certain perfumery raw materials measured by GC / MS on the normal skin panelist after the 4-hour drydown of the control fragrance (left bar) and of the tested composition (right bar).

[0141] As shown in FIG. 1 , on the panelist self-described as having dry skin, a surprising increase in the evaporation rate of low volatility ingredients (so-called bottom notes), such as Heliopropanal, Hedione, Helvetolide and Ambrox, was observed in the test composition. At the same time, the release of higher volatility compounds (so-called top and middle notes), such as Ethyl Linalool, Florol, and Calone, was observed. On the other hand, as shown in FIG. 2, no significant performance difference between the test and control formulations was observed on the panelist self-described as having normal skin.

[0142] When comparing only the performance of the control fragrance on the panelists, it can be seen that the fragrance release rate, particularly of the lower volatility notes, of the fragrance on the panelist self-reported as having dry skin was lower than the fragrance release rate of the fragrance on the panelist self-reported as having normal skin, confirming that skin type affects fragrance performance. The inclusion of a humectant like saccharide isomerate in the composition appears to increase the release rate of fragrance from dry skin to the release rate of fragrance from normal skin.

[0143] This provides a skin-normalization solution to address dry skin as well as the effect of seasonal change on skin, i.e. drying of skin during winters and cold days.

[0144] Example 2

[0145] The test composition and control compositions described in Example 1 were compared to a comparative composition identical to the test composition, except that Firmenich SA saccharide isomerate was replaced with isocetyl alcohol (“Fix-E”), which is a traditional fragrance modulator. The solutions were tested in aluminum crucibles in vitro. 10 pl of each solution was added to a crucible and dried down for 4 hours on a slide warmer at 32 °C (skin temperature). After drydown, the fragrance crucibles were transferred into headspace vials and analyzed using dynamic headspace analysis with GC / MS. FIG. 3 shows the levels of certain perfumery raw materials measured by dynamic headspace of the control fragrance (left bar), of the comparative fragrance (middle bar) and of the test composition (right bar).

[0146] Unlike the traditional modulation of isocetyl alcohol, instead of extending high volatility notes release and suppressing low volatility notes, saccharide isomerate surprisingly extends the release rate of low volatility notes while reducing high volatility notes. Without wishing to be bound by theory, it is believed that all fragrance oil volatility is generally increased such that the high volatility notes have already evaporated while the low volatility ones are still evaporating at a higher rate. As shown in this example, the advantageous effect is not limited to skin.

[0147] The disclosed subject matter has been described with reference to specific details of particular embodiments thereof. It is not intended that such details be regarded as limitations upon the scope of the disclosed subject matter except insofar as and to the extent that they are included in the accompanying claims.

[0148] Therefore, the exemplary embodiments described herein are well adapted to attain the ends and advantages mentioned as well as those that are inherent therein. The particular embodiments disclosed above are illustrative only, as the exemplary embodiments described herein may be modified and practiced in different but equivalent manners apparent to those of ordinary skill in the art having the benefit of the teachings herein. Furthermore, no limitations are intended to the details of construction or design herein shown, other than as described in the claims below. It is therefore evident that the particular illustrative embodiments disclosed above may be altered, combined, or modified and all such variations are considered within the scope and spirit of the exemplary embodiments described herein. The exemplary embodiments described herein illustratively disclosed herein suitably may be Firmenich SA practiced in the absence of any element that is not specifically disclosed herein and / or any optional element disclosed herein.

Claims

Firmenich SACLAIMS1 . A composition comprising: a) a perfume mixture comprising at least one perfumery raw material, b) at least one humectant, c) optionally, a Ci-Ce alkyl alcohol, and d) water.

2. The composition according to claim 1 , wherein the perfume mixture is present in an amount of from 0.2 to 50% by weight, relative to the total weight of the composition.

3. The composition according to claim 1 or 2, wherein the at least one humectant is present in an amount of less than or equal to 10%, typically less than 3%, by weight, relative to the total weight of the composition.

4. The composition according to any one of claims 1 to 3, wherein the at least one humectant is present in an amount of from 0.01 to 10%, typically from 0.5 to 3%, by weight, relative to the total weight of the composition.

5. The composition according to any one of claims 1 to 4, wherein the at least one humectant is selected from the group consisting of panthenol, allantoin, agarose, com glycerides, gluconolactone, lactobionic acid, kombucha, salicylic acid, molasses, seaweed, honey, glycerin, aloe vera, urea and derivatives thereof, such as hydroxyethyl urea; alkanediols, such as 1 ,2-propanediol, 1 ,2-butanediol, 1 ,2- pentanediol, 1 ,2-hexanediol, 1 ,2-heptanediol, 1 ,2-octanediol, 1 ,3-propanediol, 2- methyl-1 ,3-propanediol, and 3-methyl-1 ,3-butanediol; polyethylene glycols, such as PEG-x, wherein x represents the average moles of ethylene oxide; polypropylene glycols, such as dipropylene glycol; triols, such as phytantriol and hexanetriol; alpha hydroxy acids, such as glycolic acid, lactic acid, citric acid, mandelic acid, malic acid, and tartaric acid; sugar alcohols and derivative thereof, such as xylitol, sorbitol, maltitol, erythritol, mannitol, xylitylglucoside, anhydroxylitol, and inositol; saccharides and derivatives thereof, such as lactose, maltose, fructose, and saccharide isomerate; polysaccharides and derivatives thereof, such as hyaluronic acid, sodiumFirmenich SA hyaluronate and benzyl hyaluronate; peptides and amino acids and derivatives thereof, such as betaine (N,N,N-trimethylglycine), sodium (2S)-5-oxo-2- pyrrolidinecarboxylate (sodium PCA), proline, polyglutamic acid, arginine, copper peptides, lysine, sodium aspartate, elastin, collagen, silk keratin, and glycogen; polyethylene glycol ethers of fatty alcohols, such as isoceteth-x, isolaureth-x, laneth- x, laureth-x, and steareth-x, wherein x represents the average moles of ethylene oxide, silicone copolyols, and any combination thereof.

6. The composition according to any one of claims 1 to 5, wherein the at least one humectant comprises a saccharide, typically lactose, maltose, fructose, glucose, galactose, psicose, any isomers thereof, or any mixture thereof.

7. The composition according to any one of claims 1 to 6, wherein the Ci-Ce alkyl alcohol is present in an amount of from 0.01 to 90%, typically from 1 to 80%, by weight, relative to the total weight of the composition.

8. The composition according to any one of claims 1 to 7, wherein the Ci-Ce alkyl alcohol is comprises ethanol.

9. The composition according to any one of claims 1 to 8, wherein the water is present in an amount of from 0.01 to 90%, typically from 1 to 80%, by weight, relative to the total weight of the composition.

10. The composition according to any one of claims 1 to 9, wherein the composition is formulated as a fine fragrance composition, typically eau de parfums, eau de toilettes, aftershaves, colognes, body splashes, or body sprays.

11. A method for modulating the release rate of low volatility notes of a composition on a surface, the composition comprising a perfume mixture comprising at least one perfumery raw material, optionally a Ci-Ce alkyl alcohol, and water, the method comprising a) adding an effective amount of at least one humectant to the composition and b) applying the composition formed in step a) to the surface.

12. The method according to claim 11 , wherein the surface is skin.Firmenich SA13. The method according to claim 12, wherein the skin is dry skin.

14. The method according to claim 13, wherein the release rate of low volatility notes of the composition is similar or equal to the release rate of low volatility notes of the same composition free of humectant on normal skin.

15. Use of a humectant to modulate the release rate of low volatility notes of a composition on a surface, the composition comprising a perfume mixture comprising at least one perfumery raw material, optionally a Ci-Ce alkyl alcohol, and water.

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