Ethanol-free microemulsion perfuming compositions

Abstract

The present invention provides a perfuming composition that is free of ethanol and that is in the form of a transparent, clear microemulsion that contains a fragrance at a concentration of 0.5 to 50% by weight; a solvent at a concentration of 1 to 36% by weight; a non-ionic surfactant at a concentration of 1 to 35% by weight; an ionic surfactant at a concentration of 0 to 12% by weight, a cooling hydrotrope at a concentration of 0.01 to 12% by weight and water. Said microemulsions benefit from the presence of a cooling hydrotrope which allows lowering the amount of surfactant needed and provides a cooling effect.

Claims

1. A transparent and ethanol-free microemulsion for replacement of ethanol containing microemulsions in perfuming applications comprising: 0.5% to 50% of a fragrance-oil; 1% to 36% of a solvent; a surfactant system comprising: a) at least one non-ionic surfactant present in an amount of 1% to 35%; and b) at least one ionic surfactant present in an amount of 0% to 12%; 0.01% to 12% of at least one cooling hydrotrope that is not a surfactant and that evokes or prolongs a sensation of cold by modulation of the transient receptor potential (TRP) ion channels present in cold-sensitive nerve fibers of a user's skin or tongue, that has solubilizing properties, and is present in an amount which reduces the amount of surfactant needed to solubilize the oil in the microemulsion; and water; wherein the perfuming composition remains stable during freeze-thaw cycles from 25 C. to 50 C., and wherein all concentrations are based on the weight of the composition; and wherein the cooling hydrotrope is ()-menthol, ()-cubebol, L-menthyl lactate, menthone 1,2-glycerol ketal, N-(2-hydroxyethyl)-2,3-dimethyl-2-isopropylbutyramide (WS3), 2-isopropyl-N,2,3-trimethylbutanamide (WS23), a mixture of WS3 and WS23, isopulegol, menthyl ethoxyhydroxyacetate, menthoxypropanediol; menthyl succinate, menthol ethylene glycol carbonate, menthol propylene glycol carbonate, 3-hydroxymethyl p-menthane or mixtures thereof.

2. The microemulsion according to claim 1, wherein the fragrance oil is present in an amount of 0.5% to 15% of the microemulsion.

3. The microemulsion according to claim 1, wherein the solvent is selected from the group consisting of propylene glycol, dipropyleneglycol, diethyl phthalate, isopropyl myristate, benzyl benzoate, 2-(2-ethoxyethoxy)-1-ethanol, ethyl citrate and 1,2-alkanediols with 5-10 carbons.

4. The microemulsion according to claim 1, wherein the non-ionic surfactant is selected from the group consisting of: sugar ester compound; C.sub.8-22-alkyl polyglucoside; ethoxylated aliphatic C.sub.6-C.sub.20 alcohol containing 2 to 30 EO and/or PO units; polyoxyethylene C.sub.16-60 hydroxylester containing 10 to 40 EO units; and C.sub.8-C.sub.20 mono- and polyglyceryl ester.

5. The microemulsion according to claim 1, wherein the non-ionic surfactant is used in a total amount of between 1 and 15% by weight.

6. The microemulsion according to claim 1, wherein the ionic surfactant is selected from the group consisting of alkyl sulfosuccinates, sodium dioctyl sulfosuccinate, sodium dihexyl sulfosuccinate, ammonium or sodium lauryl ether sulfate, C.sub.8-22 salts of N-acyl amino acid, C.sub.6-15 alkyl ether sulfates, C.sub.7-24 alkyl ether sulfonates, C.sub.6-C.sub.24 alkyl ether carboxylates, C.sub.10-35 quaternary ammonium compounds, C.sub.20-30 alkyl pyridinium chlorides or bromides, hydroxyl ethyl cetyldimonium phosphate; quaternary amino acid, C.sub.8-16 alkyl amine oxides and C.sub.10-25 alkyl betaines.

7. The microemulsion according to claim 1, wherein the ionic surfactant is used in a total amount of no more than 5% by weight.

8. The microemulsion according to claim 1, wherein the solvent/surfactant system w/w ratio is 0.2 to 4.

9. The microemulsion according to claim 1, wherein the cooling hydrotrope is present in an amount of 0.01 to 4% by weight.

10. The microemulsion according to claim 1, which is free from ionic surfactant.

11. A perfumed consumer product comprising a perfuming composition according to claim 1.

12. The perfumed consumer product according to claim 11, in the form of a cologne, lotion, body splash or body mist.

13. The perfumed consumer product according to claim 11, in the form of a body splash wherein the fragrance oil is present in an amount of 3% to 8% and the non-ionic surfactants include one or more alkyl polyglucosides.

14. A transparent, clear microemulsion that is free of volatile organic solvents comprising: 1% to 36% of propylene glycol, dipropyleneglycol, diethyl phthalate, isopropyl myristate, benzyl benzoate, 2-(2-ethoxyethoxy)-1-ethanol, ethyl citrate or an 1,2-alkanediol having 5-10 carbons; a surfactant system comprising: a) at least a non-ionic surfactant present in an amount of 1% to 35%; and b) at least an ionic surfactant present in an amount of 0% to 12%; 0.01% to 12% of at least a cooling hydrotrope that is not a surfactant and that evokes or prolongs a sensation of cold by modulation of the transient receptor potential (TRP) ion channels present in cold-sensitive nerve fibers of a user's skin or tongue, that has solubilizing properties, and is present in an amount which reduces the amount of surfactant needed to solubilize the oil in the microemulsion; and water; wherein the microemulsion remains stable during freeze-thaw cycles from 25 C. to 50 C., and wherein all concentrations are based on the weight of the composition; and wherein the cooling hydrotrope is ()-menthol, ()-cubebol, L-menthyl lactate, menthone 1,2-glycerol ketal, N-(2-hydroxyethyl)-2,3-dimethyl-2-isopropylbutyramide (WS3), 2-isopropyl-N,2,3-trimethylbutanamide (WS23), a mixture of WS3 and WS23, isopulegol, menthyl ethoxyhydroxyacetate, menthoxypropanediol; menthyl succinate, menthol ethylene glycol carbonate, menthol propylene glycol carbonate, 3-hydroxymethyl p-menthane or mixtures thereof.

15. A perfuming composition comprising the microemulsion of claim 14 and 0.5% to 50% of a fragrance oil.

16. A perfumed consumer product comprising a perfuming composition according to claim 15 in the form of a body splash wherein the fragrance oil is present in an amount of 3% to 8% and the non-ionic surfactants include one or more alkyl polyglucosides.

17. The microemulsion according to claim 14, which is free from ionic surfactant.

18. The microemulsion according to claim 14, which is free from cationic surfactant.

19. The microemulsion according to claim 1, which is free from cationic surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

(1) Unless stated otherwise, % are meant to designate percent by weight of the composition. Percentages of surfactants correspond to a percentage in active matter.

(2) The present invention resolves the deficiencies of the prior art by providing a perfuming composition in the form of a transparent and EtOH-free microemulsion comprising:

(3) 0.5% to 50% of a fragrance oil;

(4) 1.0% to 36% of a solvent;

(5) a surfactant system comprising:

(6) a) at least a non-ionic surfactant present in an amount of 1.0% to 35%; and

(7) b) at least a ionic surfactant present in an amount of 0% to 12%;

(8) 0.01% to 12% of at least a cooling hydrotrope; and

(9) water;

(10) wherein the perfuming composition remains stable during freeze-thaw cycles from 25 C. to 50 C., and wherein all concentrations are based on the weight of the composition.

(11) The amount of water in the perfuming compositions of the invention can vary such that the compositions can be in the form of a more concentrated product or in a more diluted version. Typically, in a more concentrated version, the amount of water will be up to 20%.

(12) According to a particular embodiment of the invention, consisting of a diluted version of the product, the composition of the invention comprises:

(13) 0.5% to 15% of a fragrance oil;

(14) 1.0% to 25% of a solvent;

(15) a surfactant system comprising:

(16) a) 1.0% to 15% of at least a non-ionic surfactant; and

(17) b) 0% to 5% of at least a ionic surfactant;

(18) 0.01% to 4% of at least a cooling hydrotrope; and

(19) water;

(20) wherein all concentrations are based on the weight of the composition. Typically in such diluted product, water will be present in amount varying between 65% and 90% by weight.

(21) A hydrotrope in the context of the invention, also sometimes referred to as solubilizing aid, is meant to designate a compound that is not a surfactant, but which has solubilizing properties, i.e. which allows, when used in a microemulsion, reducing the amount of surfactant used to solubilize a certain quantity of oil, while not being able to replace totally the surfactant. From a different angle, a hydrotrope allows, for a defined concentration of surfactant, increasing the concentration of oil that can be solubilized. According to a particular embodiment, the hydrotrope of the present invention is free from metal salt of organic acids.

(22) When referring to cooling properties of a compound like a cooling agent or a cooling hydrotrope in the context of the present invention, it is meant a compound that evokes or prolongs a sensation of cold by modulation of the transient receptor potential (TRP) ion channels present in cold-sensitive nerve fibers of the skin or of the tongue. What is therefore not considered as cooling in the sense of the present invention is the effect provided on the skin by the evaporation of a solvent or water with a corresponding decrease in the temperature.

(23) The compositions of the invention advantageously allow minimizing the amount of surfactant by using a compound that acts as a hydrotrope, but beyond that first advantage, the compositions present an additional benefit due to the fact that the same compound which acts as a hydrotrope is a cooling agent. The compositions of the invention are therefore particularly advantageous as they meet the criteria of being EtOH-free, transparent, non-irritating to the skin while providing a very pleasant non-sticky and proper cooling feeling on the skin.

(24) For the sake of clarity, the % amounts are the total amount, in particular when it is mentioned at least one said amount is the total amount obtained by adding all the amount of each constituent of the said type. It is also understood that water is present in the appropriate amount to reach the 100%, i.e. is added up to completion to 100% w/w.

(25) For the sake of clarity, by transparent, clear it is meant a microemulsion presenting a clarity preferably comprised between 0 and 90 NTU, when measured between 400 and 600 nm in a 2.5 cm cell at 25 C. By clarity what is meant is the measure of the light scattered, at an angle of 90, by these microemulsions. According to a preferred embodiment of the invention, the microemulsion has clarity comprised between 0 and 50 NTU when measured under the preceding conditions.

(26) For the sake of clarity, by microemulsion it is meant a dispersion that forms spontaneously and has a droplet size comprised between 10 and 150 nm, at a temperature comprised between 0 C. and 50 C. According to a particular embodiment of the invention, the present microemulsion has a droplet size comprised between 10 and 60 nm, or even between 10 and 40 nm, at a temperature comprised between 0 C. and 50 C.

(27) For the sake of clarity, by stable during freeze-thaw cycles it is meant that said microemulsions also display very good stability, e.g. phase separation is not observed within a reasonable frame of time when tested with at least 5 and up to 10 freeze freeze-thaw cycles from 20 C. to RT to 50 C. (24 hours per each condition). According to a particular embodiment of the invention the invention microemulsion can also display good stability when stored 3 months at 3 C. and 45 C.

(28) For the sake of clarity, by fragrance oil it is meant the usual meaning in the art, i.e. a lipophilic organic liquid that is essentially insoluble in water and being composed of one or more perfuming ingredients.

(29) In particular, there can be used any perfuming ingredient or, as happens more often, any mixture of perfuming ingredients currently used in perfumery, e.g. of compounds capable of imparting an hedonic olfactive effect to the composition to which they are added. The perfuming ingredients can be of natural or synthetic origin. A detailed description of the ingredients would not be warranted here and, in any case, it cannot be exhaustive. Generally speaking, it can be mentioned that these ingredients belong to chemical classes as varied as alcohols, aldehydes, ketones, esters, ethers, acetates, nitriles, terpenes, hydrocarbons, nitrogenous or sulphurous heterocyclic compounds and essential oils of natural or synthetic origin. The nature of these ingredients can be found in specialized books of perfumery and flavor ingredients, e.g. in S. Arctander (Perfume and Flavor Chemicals, Montclair N.J., USA 1969), or similar textbooks of reference, and a more detailed description thereof is not warranted here. The selection of such ingredients is carried out by the perfumer without particular difficulty, on the basis of her/his general knowledge and as a function of the nature of the product to be modified and of the desired sensory effect, i.e. the perfuming or taste effect that is to be imparted to the consumer product to be perfumed or flavored.

(30) Advantageously and contrary to what was known heretofore in the field of microemulsions, the system of the present invention works and provides a product with required properties over a very wide range of log P. According to a particular embodiment of the invention, said fragrance oil has a log Pmix comprised between about 1 and about 7, most preferably between 1 and 4.

(31) For the sake of clarity, by log Pmix it is intended the calculated log P of the mixture of perfume ingredients, which is obtained by the formula:

(32) $\mathrm{logPmix}=\underset{i=1}{\overset{n}{.Math.}}{x}_i{\mathrm{logP}}_i$
wherein x.sub.i is the molar fraction and log P.sub.i is the calculated log P of the i.sub.th ingredient in the mixture of n perfumery ingredients.

(33) Said calculated log P is the calculated log P for each single perfuming ingredient which can be obtained according to the program EPI suite (4.0); EPA (US Environmental Protection Agency) and Syracuse Research Corporation (SRC), 2000.

(34) According to any one of the invention's embodiments, the fragrance oil is present in an amount of about 0.5 to 50% by weight, preferably between 0.5 and 35% and more preferably between 2.5 and 15% by weight of the formulation.

(35) The invention's microemulsion also contains a suitable solvent, in an amount of 1 to 36% by weight, and preferably 1 to 25% by weight, or even 1 to 10% by weight. Generally said solvent is present because some perfuming ingredients are available in a more or less concentrated solution in such solvent, and for example the most commonly used solvent are a dipropyleneglycol, diethyl phthalate, isopropyl myristate, benzyl benzoate, 2-(2-ethoxyethoxy)-1-ethanol, ethyl citrate and 1,2-alkanediols with 5-10 carbons. Alternatively, said solvent can be just added to the oil for any purpose. As examples of suitable solvents, one may cite polar or non-polar low molecular weight solvents such as isoparaffins, paraffins, hydrocarbons, silicon oils, perfluorinated aliphatic ethers, glycol ethers, glycol ether esters, esters, or ketones. Non-restrictive examples of such solvents includes dimethicone or cyclomethicone, which are commercialized by Chemsil Silicon INC. under the trade names COSMETIC FLUID 1288, and respectively COSMETIC FLUID 1387, jojoba oil, perfluoroisobutyl methyl ether, diethyl phthalate, propylene glycols, triacetin and isopropyl myristate.

(36) According to any one of the invention's embodiments, the solvent is a glycol such as propylene glycol. For a better skin feel in cosmetics butylene glycol or di-propylene glycol are preferred. Following a natural ingredient formulation, a natural 1,3-propanediol, i.e., a propylene glycol, should be used as it provides very good performance. The most preferred solvents are 1,2 or 1,3 propylene glycol, 1,2-alkanediols with 5-10 carbons, dipropylene glycol, 1,2 or 1,3-butylene glycol.

(37) According to a particular embodiment of the invention, it is useful to have a fragrance oil/solubilizing system w/w ratio comprised between about 0.3 to 1.5.

(38) The invention's microemulsion also contains a surfactant system containing one or two different types of raw materials.

(39) According to any one of the invention's embodiments, it is useful to have a solvent/surfactant system w/w ratio comprised between about 0.2 and 4, preferably between about 0.25 and 2.0.

(40) A first type of raw material of the solubilizing system, and mandatory, is a non-ionic surfactant. Many different types of non-ionic surfactants can be used. According to any one of the invention's embodiments, in particular and as non-limiting examples one may cite those belonging to the classes of: sugar ester compound such as sucrose esters with C.sub.8-C.sub.20 fatty acid (such as sucrose esters with oleic, palmitic or stearic acid, such as a sucrose monopalmitate, e.g. Habo Monoester P90 commercialized by Compass Foods Corporation), C.sub.8-22-alkyl polyglucosides (such as those sold under the name Plantacare by BASF); e.g. fatty alcohol glucosides such as C.sub.8-C.sub.16 alkyl glucoside, e.g. decylglucoside (known also as Plantacare 2000UP), C.sub.12-C.sub.16 alkyl glucoside, e.g. laurylglucoside (known also as Plantacare 1200UP), C.sub.8-C.sub.16 alkyl glucoside, e.g. cocoglucoside (known also as Plantacare 818UP), C.sub.8-C.sub.10 alkyl glucoside, e.g. caprylyl/caprylglucoside (known also as Plantacare 810UP); or combination thereof with a fatty acid e.g. cocoglucoside and glyceryl oleate (known also as Lamesoft PO 65 by BASF), ethoxylated aliphatic C.sub.6-C.sub.20 alcohols containing 2 to 30 EO and/or PO units (EO being ethyleneoxide and PO being propylene oxide) and in particular a C.sub.11-15 alcohol ether with 9 EO units (such as Tomadol 1-9 or Tomadol 25-9), a butyl alcohol ether with 24 to 27 EO and/or PO oxide units (such as PPG-24 Buteth-26 from Dow Chemical), a phosphoric ester of three lauryl alcohol ether with 3 EO (such as Trilaureth-4 Phosphate from Clariant) and mixtures thereof, polyoxyethylene C.sub.16-60 hydroxylesters containing 10 to 40 EO units, such as polyoxyethylenesorbitan monooleate (for examples sorbitol monoesters with oleic, myristic, stearic or palmitic acid, e.g. sorbitol monoester with a fatty acid which are polyethoxylated and containing 10 to 40 EO units also known as those known under the tradenames Tweens by ACROS Organics (Geel, Belgium)), or such as polyethoxylated castor oils triglyceride containing 10 to 40 EO units such as e.g. Cremophor RH 40 by BASF, C.sub.8-C.sub.20 mono- and polyglyceryl esters (such as Dermofeel series commercialized by Dr. Streatmans Chemische Produkte GmbH Germany).

(41) According to any one of the invention's embodiments, said non-ionic surfactant is an alkyl polyglucoside having an average polymerization degree of 1.1 to 2 and an average alkyl length of C.sub.8-18. This type of surfactant is the most important sugar based surfactants and is particularly appreciated in the present context for their excellent performance, mildness, low interfacial tension and high dispersing power. Non-limiting examples of such alkyl polyglucosides are: Plantacare 810UP, 818UP, 1200UP, 2000UP, (Plantacare are derived from starch and fatty alcohols from palm kernel or coconut oil and are used in many cosmetic applications); and Lamesoft PO 65, a composite based on alkyl polyglucoside and mono glyceryl oleate.

(42) According to a particular embodiment of the invention, these non-ionic surfactants are used in a total amount of between about 1 and 15% by weight, and more preferably between about 4 and 10% by weight.

(43) A second type of raw material of the solubilizing system, and optional, is a ionic surfactant.

(44) When present, many different types of ionic surfactants can be used. In particular and as non-limiting examples one may cite those bellowing to the classes of: Anionic surfactants that include alkyl sulfosuccinate, sodium dioctyl sulfosuccinate (Aerosol OT), sodium dihexyl sulfosuccinate (AMA), ammonium or sodium lauryl ether sulfate; C.sub.8-22 salts of N-acyl amino acids such as taurate, sarcosinate, proline or glutamate (such as cocoyl proline sold as Natisol by Sinerga); C.sub.6-15 alkyl ether sulfates; C.sub.7-24 alkyl ether sulfonates, or C.sub.6-C.sub.24 alkyl ether carboxylates (e.g. counterion can be sodium, ammonium, or potassium); alkyl sulfosuccinate can include a mono or dialkyl sulfosuccinate or a C.sub.6-22 sulfosuccinate. Cationic surfactants that include a C.sub.10-35 quaternary ammonium compound (e.g., an alkyldimethylammonium haloginide), C.sub.20-30 alkyl pyridinium chlorides or bromides, or other hydrogenides or polyquaterny polymers such as e.g. hydroxyl ethyl cetyldimonium phosphate sold as Luviquat Mono CP by BASF. Amphoteric surfactants include, for example, a quaternary amino acid, an C.sub.8-16 alkyl amine oxide, or a C.sub.10-25 alkyl betaine.

(45) According to any one of the invention's embodiments, these ionic surfactants are used in an amount of between about 0 and 12% by weight, and more preferably between about 0 and 5% by weight. According to a particular embodiments, these ionic surfactants are not used (i.e. 0%), i.e. the composition of the invention is free from ionic surfactant. According to another embodiment, the compositions of the invention are free from cationic surfactant. To the best of our knowledge, EtOH-free, transparent, stable microemulsion of perfumes devoid of ionic surfactant are also not known.

(46) A fourth type of raw material of the invention's microemulsion, and mandatory, is a cooling hydrotrope. Said cooling hydrotrope is typically a cooling agent, as defined here-in above and which also acts as a hydrotrope. In fact it was surprisingly discovered that known cooling agents can also be used as hydrotrope in microemulsions.

(47) Without the addition of said cooling hydrotrope the formation of microemulsion is not possible or requires higher surfactant concentration.

(48) For the sake of clarity, by hydrotrope in the present invention it is meant a compound that is able to decrease the surfactant concentration necessary for microemulsion formation at given oil concentration, increase the solubilisation capacity of the microemulsion. These molecules are surface active, i.e. decrease the surface tension of water but cannot replace totally the surfactant.

(49) Cooling agents are known compounds and are disclosed in an abundant literature. According to a particular embodiment of the invention, the cooling agents having C.sub.10-25 and comprising one or two 2-isopropyl-5-methylcyclohexan-1-yl or 5-methyl-2-(prop-1-en-2-yl)cyclohexan-1-yl moieties, or a 2-isopropyl-5-methylcyclohexan-1,1-diyl or a 5-methyl-2-(prop-1-en-2-yl)cyclohexan-1,1-diyl moiety, or a C.sub.4-10 -branched alkyl group are particularly appreciated.

(50) According to any one of the invention's embodiments, the cooling agents having C.sub.10-16 and comprising a 2-isopropyl-5-methylcyclohexan-1-yl, 2-isopropyl-5-methylcyclohexan-1,1-diyl, 5-methyl-2-(prop-1-en-2-yl)cyclohexan-1-yl or 5-methyl-2-(prop-1-en-2-yl)cyclohexan-1,1-diyl moiety and one to three OH group are particularly appreciated. Alternatively, the cooling agents having C.sub.7-11 and comprising a C.sub.6-10 -branched alkyl group and/or one CONHMe group are particularly appreciated.

(51) According to any one of the invention's embodiments, said cooling agent is a natural extract containing at least 50% by weight of ()-cubebol, or ()-(1R,4S,5R,6R,7S,10R)-7-isopropyl-4,10-dimethyl-tricyclo[4.4.0.0(1,5)] decan-4-ol, e.g. as described in EP 104076.

(52) Typically, and as non limiting examples, one may cite specifically the following cooling agents: ()-menthol, ()-cubebol, L-menthyl lactate, menthone 1,2-glycerol ketal (also known as menthone glycerin acetal or as 9-methyl-6-(1-methylethyl)-1,4-dioxaspiro-[4,5]decan-2-methanol), 2-isopropyl-N,2,3-trimethylbutanamide (also known as WS-23), N-(2-hydroxyethyl)-2,3-dimethyl-2-isopropylbutyramide (also known as WS-3), isopulegol (also known as Coolact P), menthyl ethoxyhydroxyacetate (also known as (1R,3R,4S)-3-p-menthanyl (2-hydroxyethoxy)acetate, see EP 1034161), menthoxypropanediol (also known as Cooling agent 10, or as 3-(menthoxy)-1,2-diol-propane); menthyl succinate (also known as (1R)-()-dimenthyl succinate or as bis(2-isopropyl-5-methylcyclohexyl) succinate), menthol ethylene glycol carbonate (also known as 2-hydroxyethyl ((2S,5R)-2-isopropyl-5-methylcyclohexyl) carbonate or Frescolat MGC), menthol propylene glycol carbonate (also known as 2-hydroxypropyl ((2S,5R)-2-isopropyl-5-methylcyclohexyl) carbonate or Frescolat MPC), 3-hydroxymethyl p-menthane, or mixtures thereof.

(53) According to any one of the invention's embodiments, said hydrotrope is a mixture of WS3:WS23:propylene glycol (e.g. a w/w mixture of 25:25:50), WS23, menthyl lactate, menthone 1,2-glycerol ketal and/or menthoxypropanediol.

(54) According to any one of the invention's embodiments, said hydrotrope is present in an amount of about 0.01 to 12%, preferably in an amount of 0.01% to 4% and more preferably in an amount of about 0.5% to 2.5% by weight.

(55) The invention further relates to the use of a cooling agent, as defined above, to act as a hydrotrope to replace a portion of surfactant to form a transparent, clear microemulsion that is free of volatile organic solvents. The preferred microemulsion comprises the ingredients and concentrations disclosed herein.

(56) According to a particular embodiment of the invention, the invention microemulsion may optionally further comprise one or more additional ingredients providing some specific added benefits, such as preservatives or additives, emollients and/or chelating agents.

(57) Such additional ingredients are known compounds to a person skilled in the art and do not warrant a detail description. Moreover such additional ingredients can be synthetic or being natural.

(58) According to a particular embodiment of the invention, said additional ingredients are present in an amount comprised between 0.0% and 5.0% w/w.

(59) Another aspect of the present invention is a perfumed consumer product comprising the invention's perfuming compositions. The consumer product is typically a cologne, lotion, body splash or body mist.

(60) The so-called Body splash is defined as body care formulation that is applied to the body after bathing and provides a subtle hint of scent. For people who cannot tolerate strong perfumes, these body splash formulations are an appealing alternative and represent a particular embodiment of the invention.

(61) A body splash comprising an ethanol-free perfuming composition according to the invention which comprise about 3-8% of fragrance oil and having alkyl polyglucosides as non-ionic surfactants is a particular aspect of the present invention.

EXAMPLES

(62) The following examples illustrate the most preferred embodiments of the invention without being limitative in nature.

(63) A model perfume oil (fragrance D) with a log Pmix of about 2.12 was prepared by admixing the following ingredients:

(64) TABLE-US-00001 Parts Perfume ingredients by weight Di-Propyleneglycol 55.04 Star anise oil 14.30 Dihydromyrcenol 8.60 Eucalyptus oil 4.60 Hexylcinnamic aldehyde 3.30 Tricyclo[5.2.1.0(2,6)]dec-3-en-8-yl acetate 3.30 Coranol.sup.1) 2.30 Isobornyl acetate 1.60 Dihydroestragole 1.40 2,4-Dimethyl-3-cyclohexene-1-carbaldehyde 1.45 Linalol 1.10 Habanolide.sup.2) 0.85 1,4-Dioxacycloheptadecane-5,17-dione 0.60 Benzyl salicylate 0.50 2-Methylundecanal 0.30 2-Ethyl-4-(2,2,3-trimethyl-3-cyclopenten-1-yl)-2-buten-1-ol 0.20 3-(1,3-Benzodioxol-5-yl)-2-methylpropanal 0.15 Helvetolide.sup.3) 0.15 Terpineol 0.15 Cashmeran.sup.4) 0.10 (Z)-3-Hexen-1-yl acetate 0.07 2-Undecanone 0.06 Cis 2-Pentylcyclopentan-1-ol 0.04 Dodecanal 0.03 Rose oxide 0.01 Total 45.16 .sup.1)4-cyclohexyl-2-methyl-2-butanol; origin: Firmenich SA, Geneva, Switzerland .sup.2)pentadecenolide; origin: Firmenich SA, Geneva, Switzerland .sup.3)(1S,1R)-2-[1-(3,3-dimethyl-1-cyclohexyl)ethoxy]-2-methylpropyl propanoate; origin: Firmenich SA, Geneva, Switzerland .sup.4)1,2,3,5,6,7-hexahydro-1,1,2,3,3-pentamethyl-4-indenone; origin: International Flavors & Fragrances, USA

Example 1

(65) Various compositions according to the invention where obtained by admixing the ingredients as shown in the Tables herein below:

(66) TABLE-US-00002 TABLE 1 Composition 1 Ingredient Function % by wt Water 73 1,3 Propanediol.sup.1) Solvent 6.83 Lamesoft PO 65 Non-ionic surfactant 1.54 (Coco Glucoside; Glyceryl Oleate).sup.2)** C.sub.11-15 Pareth-9/PPG-24 Buteth 26** Non-ionic surfactant 2.27 Cooling agent mixture.sup.3) Cooling hydrotrope 2.52 Additives 1.34 Fragrance D Oil 11.02 Plantacare 2000 UP Non-ionic surfactant 1.48 (Decyl Glucoside).sup.2)** Total Surfactant 7.56 Remarks Clear and transparent Stable .sup.1)Zemea marketed by DuPont Tate & Lyle .sup.2)Marketed by BASF .sup.3)A w/w mixture of 25:25:50 of (WS3 (N-ethyl-p-menthane-3-carboxamide):WS23 (2-isopropyl-N,2,3-trimethylbutyramide):1,3-Propanediol)

(67) TABLE-US-00003 TABLE 2 Composition 2 Ingredient Function % by wt Water 69.02 1,3 Propanediol Solvent 4.96 Habo Monoester P90.sup.1) (Sucrose Palmitate) Non-ionic surfactant 1.13 Lamesoft PO 65** Non-ionic surfactant 4.36 Plantacare 818 UP (Coco Glucoside).sup.2)** Non-ionic Surfactant 2.08 Plantacare 810 UP (Caprylyl/Capryl Glucoside).sup.2)** Non-ionic Surfactant 0.77 Cetiol C5 (Coco-Caprylate).sup.3) Emollient 2.17 Cetiol CC (Dicaprylyl Carbonate).sup.3) Emollient 1.65 Cooling mixture.sup.4) Cooling hydrotrope 2.50 Additives 0.83 Fragrance D Oil 10 Plantacare 2000 UP** Non-ionic surfactant 0.53 Total Surfactant 8.87 Remarks Clear and transparent Stable .sup.1)Marketed by Compass Foods .sup.2)Marketed by BASF .sup.3)marketed by Cognis .sup.4)A w/w mixture of 25:25:50 of (WS3:WS23:1,3-Propanediol)

(68) TABLE-US-00004 TABLE 3 Composition 3 Ingredient Function % by wt Water 77.16 1,3 Propanediol Solvent 6.06 Lamesoft PO 65** Non-ionic surfactant 2.86 Plantacare 818 UP** Non-ionic surfactant 0.91 Cetiol C5 (Coco-Caprylate) Emollient 2.47 Cooling mixture.sup.1) Cooling hydrotrope 2.00 Additives 1.00 Fragrance D Oil 5.01 Plantacare 2000 UP** Non-ionic surfactant 2.53 Total Surfactant 6.3 Remarks Clear and transparent Stable .sup.1)A w/w mixture of 25:25:50 of (WS3:WS23:1,3-Propanediol)

(69) TABLE-US-00005 TABLE 4 Composition 4 Ingredient Function % by wt Water 87.73 Plantacare 818 UP** Non-ionic surfactant 1.37 Plantacare 810 UP** Non-ionic surfactant 2.1 Natisol (Cocoyl Proline).sup.1)** Anionic surfactant 2.07 Chlorhexidin Gluconate.sup.2) Preservative 0.64 WS 23 (2-isopropyl-N,2,3- Cooling Hydrotrope 0.86 trimethylbutyramide) Cooling 10 (3-(1-Menthoxy)propane- Cooling Hydrotrope 0.21 1,2-diol) Fragrance D Oil 5.02 Total Surfactant 5.54 Remarks Clear and transparent Stable .sup.1)Marketed by Sinerga .sup.2)Marketed by ICI

(70) TABLE-US-00006 TABLE 5 Composition 5 Ingredient Function % by wt Water 74.28 Plantacare 818 UP** Non-ionic surfactant 1.32 Plantacare 810 UP** Non-ionic surfactant 2.11 Natisol** Anionic surfactant 1.64 Chlorhexidin Gluconate Preservative 0.62 Propylene Glycol.sup.1) Solvent 14.03 WS 23 Cooling Hydrotrope 0.87 Cooling 10 Cooling Hydrotrope 0.16 Fragrance D Oil 4.97 Total Surfactant 5.07 Remarks Clear and transparent Stable .sup.1)Marketed by Carlo Erba

(71) TABLE-US-00007 TABLE 6 Composition 6 Ingredient Function % by wt Water 70.75 Symbiosolve XC.sup.1)** Anionic surfactant 2.91 Plantacare 2000 UP** Non-ionic surfactant 1.24 Propylene Glycol Solvent 19.54 Cooling 10 Cooling Hydrotrope 0.32 Fragrance D Oil 5.24 Total Surfactant 4.13 Remarks Clear and transparent Stable .sup.1)Symbiosolve XC sold by Dr. Straetmans Germany: Caprylyl/Capryl Wheat Bran/Straw Glycosides; Aqua; Fusel Wheat Bran/Straw Glycosides; Polyglyceryl-5 Oleate; Sodium Cocoyl Glutamate; Glyceryl Caprylate

(72) TABLE-US-00008 TABLE 7 Composition 7 Ingredient Function % by wt Water 10.68 Propylene Glycol Solvent 10.45 Habo Monoester P90 Non-ionic surfactant 3.97 Lamesoft PO 65** Non-ionic surfactant 10.07 Plantacare 818 UP** Non-ionic surfactant 3.88 Plantacare 810 UP** Non-ionic surfactant 1.73 Plantacare 2000 UP** Non-ionic surfactant 1.01 Cetiol Sensoft (Propylheptyl).sup.1) Emollient 13.27 Cooling 10 Cooling Hydrotrope 5.28 Fragrance D Oil 39.67 Total Surfactant 20.66 Remarks Clear and transparent Stable .sup.1)Marketed by Cognis **Active matter in surfactants: Surfactant % active Lamesoft PO 65 65-68 Plantacare 818 UP 51-53 Plantacare 810 UP 62-65 Plantacare 2000 UP 51-55 Plantacare 1200 UP 50-53 Symbiosolve XC 70 Natisol 60 C.sub.11-15 Pareth-9/PPG-24 Buteth 26 50

Comparative Examples 1 to 3

(73) Various microemulsion compositions where obtained by admixing the ingredients as shown in the Tables herein below:

(74) TABLE-US-00009 TABLE 8 Comparative example 1 (According to U.S. Pat. No. 5,468,725) % by wt % by wt Out of Ingredient Function invention invention Water 95.33 95.91 Cremophor RH 40 Non-ionic 1.99 2.01 (Polyoxyl castor oil).sup.1) surfactant Luviquat Mono CP Cationic 0.08 0.08 (Hydroxyethyl cetyldimonium Surfactant phosphate).sup.1) Cooling 10 Cooling 0.61 0.00 Hydrotrope Fragrance D Oil 2 2 Total Surfactant 2.07 2.09 Remarks Clear and Opalescent transparent .sup.1)Marketed by BASF

(75) Total surfactant concentration necessary to obtain a clear microemulsion with formulation out of the invention was: 5.2% (i.e. the cooling agent allow to use less than 50% of the surfactant usually necessary)

(76) TABLE-US-00010 TABLE 9 Comparative example 2 (according to US 2011/0177995) % by wt in % by wt active Out of Ingredient Function invention invention Water 74.29 75.30 Cremophor RH 40 Non-ionic 1.50 1.52 surfactant Aerosol OT (Dioctyl Cationic 1.50 1.52 sulfosuccinate sodium surfactant salt).sup.1) Plantacare 1200 UP Non-ionic 1.50 1.50 (Lauryl Glucoside).sup.2) surfactant Hexylene Glycol Solvent 10.00 10.13 Cooling 10 Cooling 1.21 0.00 Hydrotrope Fragrance D Oil 10 10.01 Total Surfactant 4.50 4.54 Remarks Clear and Opalescent transparent .sup.1)Marketed by Aldrich .sup.2)Marketed by Cognis

(77) Total surfactant concentration necessary to obtain a clear microemulsion with formulation out of the invention was: 7.5% (i.e. the cooling agent allow to use less than 40% of the surfactant usually necessary)

(78) TABLE-US-00011 TABLE 10 Comparative example 3 (according to US 2011/0177995) % by wt % by wt in active Out of Ingredient Function invention invention Water 79.13 79.32 Cremophor RH 40 Non-ionic surfactant 1.49 1.49 Aerosol OT Cationic surfactant 1.48 1.48 Hexylene Glycol Solvent 10.10 10.11 1,3 Butylene Glycol Solvent 2.56 2.58 Menthoxypropanediol Cooling Hydrotrope 0.24 0.00 Fragrance D Oil 5 5.02 Total Surfactant 2.97 2.97 Remarks Clear and Opalescent transparent

(79) Total surfactant concentration necessary to obtain a clear microemulsion with formulation out of the invention could not be determined because it was found impossible to obtain a clear microemulsion with such fragrance without using the cooling agent.