MXPA00007618A - Transparent perfume composition - Google Patents

Abstract

A heavy oil remover comprises a cyclic hydrocarbon solvent, dipropylene glycol mono n-butyl ether, a volatility stabilizer, a salt of an alkyl aromatic sulfonic acid, a branched alcohol ethoxylate, an ethoxylated alkyl mercaptan, and water.

Description

COMPOSITION OF A TRANSPARENT PERFUME Technical Field The present invention relates to the field of perfumery. This relates particularly particularly to a perfume or cologne that is transparent and essentially free of present volatile organic solvents in perfumery.

Previous Art In the preparation of perfumes and colognes, the use of ethanol as a solvent is still very common. Ethanol makes possible a good solution of the perfuming ingredients used by perfumeries. Thus, it is easy to add each ingredient in the desired concentration, and obtain a transparent solution. For this reason, most perfumes and colognes available on the market still contain ethanol, usually between 50 and 95% by volume. Today, consumers tend to prefer perfumes without alcohol or with a low alcohol content, REF .: 121970 so that there is a requirement to replace ethanol in the aforementioned products. It would be desirable to replace the ethanol with water or an organic solvent, which does not leave important residues on the skin, or even by a mixture of one or more of these solvents with water. However, in this context, the use of water or a mixture of water with non-volatile organic solvents leads to problems related to the solubility of the perfume ingredients in the aqueous phase, due to its hydrophobic character. Although it is known that these hydrophobic ingredients can be emulsified in type (oil / water) emulsions, these formulations are not usually transparent. On the other hand, transparent perfume compositions are known in the prior art in the form of microemulsions containing significant amounts of surfactants. In these microemulsions, the perfume (oil phase) is dispersed in water in the form of droplets having a size of around 5-50 nm and thanks to the small size of the drops, the mixture, ie the microemulsion, is transparent . However, the need to necessarily add a significant amount of surfactants, in relation to the amount of perfume ingredients, is not desirable, as is the amount of fragrance that can be added to the mixture is considerably limited. Another type of known transparent composition is the nanoemulsion, characterized in that it has an average droplet size of the oil phase below 30-75 nm. The droplets are small enough to make the emulsion translucent or partially transparent. Although these emulsions have the advantage of requiring smaller amounts of surfactants than microemulsions, they nevertheless exhibit the disadvantage that their preparation processes are often difficult and delicate. Such emulsions are, for example, the objective of EP 728 460. "More precisely, this document describes a transparent nanoemulsion of the oil-in-water type obtained by the addition of an amphiphilic, and non-ionic lipid liquids, at a temperature below 45 ° C to obtain the emulsion This lipid is used in a proportion of 2 to 10% by weight with respect to the total weight of the lipid phase.As well as the oil phase, the patent application describes among others the oil phase and among others the use of Natural and synthetic essential oils The emulsions described are used in cosmetic compositions as a result of their ability to penetrate the skin after topical application. It is described in US patent 5,798,111, a "conventional" emulsion, in which the average size of the dispersed droplets is above 100 nm. The object of this patent is a highly viscous cosmetic emulsion, and more particularly a transparent semi-solid gel, comprising from 10 to 97% by weight of an aqueous phase containing 2-methyl-l, 3-propanediol and from 2 to 90% by weight of an oil phase comprising silicon oil. These gels have an optical turbidity of less than 50 NTU at 21 ° C. In addition, . To the aforementioned ingredients, these cosmetic compositions may contain non-ionic surfactants. The compositions described herein are excessively viscous for use in perfumery compositions such as perfumes or colognes.

Description of the invention The aim of the present invention is to solve the various problems encountered in the prior art by providing a perfume composition without any of the volatile organic solvents or VOCs defined by E. P.A. (Enviromental Protection Agency), that is, the Agency for the Protection of the Environment, in particular by providing an ethanol-free composition that is transparent. Like a composition for perfumery, it is understood here a composition with low viscosity in which one or more perfume ingredients are totally solubilized and that, unlike a cosmetic composition does not mean that it penetrates the skin once it is applied. The object of the present invention is a perfume composition in the form of an oil-in-water (oil / water) or water-in-oil (water / oil) emulsion, the oil containing at least one perfumery ingredient, said emulsion contains 5 to 50% by weight of a dispersed phase and 95 to 50% by weight of a continuous phase, the difference between the refractive index n of the dispersed phase and the continuous phase is less than or equal to about 0.003, preferably less than or equal to to 0.001. According to a preferred embodiment of the invention, the viscosity of the perfumery composition is less than 10 Pa.s, regardless of the nature of the emulsion. In the case of an oil / water emulsion, the continuous phase is formed by water (aqueous phase) and the dispersed phase is formed by the oil (oil phase). In the case of a water / oil emulsion, also called inverse emulsion, the continuous phase is formed by the oil, where the water is dispersed, and thus the dispersed phase is formed. The ingredients for perfumery dissolve in the oil phase due to their hydrophobic character. Following a preferred embodiment of the invention, the perfumery composition is formulated as a perfume or a cologne. The perfume compositions of the invention are obtained by the addition of an emulsion of certain ingredients which act on both the oil phase and the aqueous phase. The ingredients added to the perfume compositions of the invention, which are further specified herein, have the effect of modifying the refractive index of the two phases, so as to form a transparent emulsion. In fact, we have observed that the transparent emulsions of the invention can be obtained when the difference between the refractive index of the dispersed phase and the continuous phase does not exceed about 0.003. Preferably these differences are less than or equal to about 0.001. The transparency of the emulsions of the invention are characterized by a transmission measured at 600 nm (cells of 1 cm thickness), typically greater than 60% and for many emulsions above 80%. It is useful to note here that the refractive index is 1.33 and that the perfume compositions typically used have a refractive index n generally comprised between. 1.45 and 1.55. The addition of certain ingredients makes it possible to reduce the difference between the respective refractive indices of the two phases to establish them within the limits defined above. We have observed that in the context of this invention, it is possible to use a certain number of substances or agents that have the ability to act in both phases as desired and chosen, which depends on the individual criteria that can be established for each composition. The aforementioned agents will thus be selected, depending on their compatibility with the nature of the perfume, their compatibility with the skin, the desired sensation of the transparent perfume after its application on the skin, and the chemical inertness of these agents vis a vis, the ingredients of perfumery. Additionally, the substance will be used to act in the aqueous phase, it must be soluble in this phase, and the substance selected to act in the oil phase must of course be soluble in the passage of the oil phase. Thus, it is possible to use any substance that satisfies one or more of the important criteria for a given perfumery composition, since this agent is capable of increasing the refractive index n of the aqueous phase and decreasing the refractive index in such a way that the difference between the two indices of refraction this within the limits defined above (less than or equal to 0.003). The substance used can be a solid or a liquid. When the agent is a liquid ingredient, a substance with a refractive index n greater than or equal to about 1.40 is preferably used, the most appropriate values of n being greater than or equal to about 1.43, in the case where said agent acts in the watery In the case of a substance that acts in the oil phase, a refractive index n that is less than or equal to about 1.43 is preferable, an index less than or equal to about 1.40 is preferred. If a solid substance is added to a perfumery composition of the invention, it is clear that it must be soluble in the oil phase or in the aqueous phase in order to decrease, respectively the increase, the refractive index of the phase in which it acts. In the context of the present invention, the choice of this solid substance will consequently be a function of its ability to completely dissolve in the phase in which it acts and thus to adequately change the refractive index of this phase. According to the present invention it is preferable to use the active agent in the aqueous phase at least one compound selected from urea, a diol, a triol or a polyol of mono, poly or oligomeric nature, or a derivative thereof. Examples of monomeric diols or triols include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butodiol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 2-methyl-1 , 3-propanediol, 1,6-hexanediol, neopentyl glycol, trimethylolpropane, and glycerol. Examples of oligomeric or polymeric diols, triols or polyols include diethylene glycol, triethylene glycol, dipropylene glycol, polyethylene glycols with a variety of long chains. Among the derivatives of the di-, tri- or polyfunctional alcohols, there may be mentioned as an example the product marketed under the name of Lubrajel® (origin: United Guardian Inc., Hauppauge, NY, USA, distributed by Sederma, Le Perrey in Yvelines, France) containing stable glyceryl polymethacrylates with propylene glycol.

As the agent acts in the oil phase, i.e., the phase containing the perfume ingredients of a given composition, it is preferred to use a volatile silicone fluid. By fluid of. Volatile silicone is understood here as a fluid having a vapor pressure at room temperature, equal to or above the ethanol. Non-limiting examples of silicone fluids that may be used in the present invention include linear or cyclic polydimethylsiloxanes having from 2 to 10 silicon atoms, preferably from 4 to 6 silicone atoms, as is, for example, the tetrasiloxane of decamethyl, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane or dodecamethyl-cyclohexasiloxane, or any mixture of these compounds. Silicones of this type have the CTFA designations such as dimethicone (in the case of linear siloxanes) and cyclomethicones (in the case of cyclic siloxanes). These fluids are sold by various companies, for example Dow Corning: Fluids DC 244, 245, 246, 344 EU, 345 EU (mixture of cyclomethicones) or DC 200 Fluid (hexamethyldisiloxane); General Electric Silicones: SF 1173, 1202, 1204 (mixture of cyclomethicones), SF 1214 (mixture of cyclomethicones and dimethicones) or SF 96 (mixture of dimethicones); ac Silicones: Siloxane F 222, 223, 250, 251 (mixture of cyclomethicones), Siloxane F 221, Silicone Fluid SF 96, SWS 101 (mixture of dimethicones); Chemische Fabrik Th. Goldschmidt AG: Abil® K4, B 8839 (mixture of cyclomethicones), Abil® 10-10000 (mixture of dimethicones); Witco: L 7087 (dimethicone copolyol methyl ether), L 7607 (dimethicone copolyol). The best results are obtained with DC 345 EU fluid, which is a mixture composed of approximately 3 parts of decamethylcyclopentasiloxane, approximately 1 part of dodecamethylcyclohexasiloxane and small amounts of octamethylcyclotetrasiloxane. The silicones mentioned above, although they are volatile, are not part of the substances classified in the group of volatile organic solvents (VOC according to the E.P.A.) and are used advantageously in the present invention. Other substances added to the oil phase gave good results. Mention may be made, among others, of light paraffins, such as heptane, or isoparaffin fractions marketed under the name of Isopar®, for example Isopar® C or Isopar® M of the company Esso. Another class of substances that can be used advantageously according to the invention is the class of fluorinated and perfluorinated paraffins of oligomeric and polymeric nature, which are in common use.

Of course it is also possible to add to the composition a small amount of lower alcohol such as ethanol or isopropanol, to the oil phase, that is, to the perfume, or to use a perfume that is partially dissolved in a lower alcohol, which can also lead to a transparent emulsion as desired in the present invention. Since the substances are classified as volatile organic solvents, their use is less advantageous. The refractive index n of a perfume composition finished according to the invention has a value between approximately 1.40 and 1.44.

The emulsions of the invention may contain from 5 to 50% by weight, preferably from 10 to 35% by weight of the dispersed phase and from 95 to 50% by weight, preferably from 90 to 65% by weight of the continuous phase. These values are in relation to the total weight of the emulsion and are independent of the fact that the compositions of the composition of the invention are in the form of a water / oil emulsion or an oil / water.

The oil phase comprises from 15 to 60%, preferably from 20 to 50% by weight of the perfume ingredients. From 20 to 65% of the aqueous phase is water. The emulsions of the invention containing the aforementioned ingredients may show sufficient stability as such during storage.

This is in the particular case when one or more of the substances added for the purpose of modifying the refractive index of one or the other phase are capable of stabilizing the emulsion as a result of their surfactant properties. If required, at least one surfactant is added to the composition of the invention to obtain a stable emulsion. This surfactant will be used in a proportion of 0 to 8%, preferably 0.1 to 5% by weight, in relation to the total weight of the emulsion. The best results are obtained using 2 to 5% by weight of surfactant. The different types of surfactants can be used in the context of the invention. Nonionic, cationic, anionic, amphoteric and phospholipid surfactants may be mentioned, all of which may be used in the present invention. Preferably, a non-ionic surfactant or a mixture of two non-ionic surfactants is used. As non-limiting examples, there may be mentioned the ethoxylated nonylphenol comprising from 9 to 10 ethylene glycol units (sold under the name of Triton ® N-101).; origin: Fluka, Switzerland) or the ethoxylated undecanol comprising 8 units of ethylene glycol (sold under the name Imbentin ® 0800, origin: Kolb AG, Switzerland). Other examples include the surfactants known under the trade name Tween ® (Origin: ICI, England), such as Tween ® 20 [polyoxyethylene (20) sorbitan monolaurate], Tween ® 40 [polyoxyethylene (20) sorbitan monopalmitate], Tween ® 60 [polyoxyethylene (20) sorbitan monostearate] and Tween ® 80 [polyoxyethylene (20) sorbitan monooleate], and the surfactants marketed under the name of Span ® (origin: ICI, England), such as Span ® 20 (sorbitan monolaurate ), Span ® 40 (sorbitan monopalmitate), Span ® 60 (sorbitan monostearate) and Span ® 80 (sorbitan monooleate). Additionally, Cremophor ® RH40 and RH60 (origin: BASF AG, Germany, which are ethoxylated hydrogenated castor oils), Genapol ® [origin: Hoeschst AG, Germany, a sodium lauryl sulphate (polyglycol alcohol ether)], the known surfactant can be mentioned under the name of Poloxamer ® 407 (a copolymer of diblock ethylene oxide and propylene oxide, also marketed under the names of Pluronic ® F 127 and Pluracare ® F 127, origin: BASF-AG, Germany); Tetronic ® (origin: BASF AG, Germany); DC 3225 C, DC 5200, DC 193 (origin: Dow Corning, USA); Abil ® Em 97 (origin: Goldschmidt).

The perfume ingredients that can be used in the present invention are all ingredients commonly used in perfumery. These ingredients will not be described in great detail here, as their description is not exhaustive and the person skilled in the art of choosing the use of their general knowledge and as a function of the desired olfactory effects. The perfume ingredients belong to a variety of chemical classes, varieties such as alcohols, aldehydes, ketones, esters, ethers, acetates, nitriles, terpene hydrocarbons, compounds containing heterocyclic nitrogen or sulfur, as well as essential oils of natural or synthetic origin. Many of these ingredients are further described in textbook references such as S. Arctander's book, Perfume and Flavor Chemicals, 1969, Montclair, New Jersey, USA, or their more recent versions, or other works of a similar nature. The emulsions of the invention can be easily prepared by conventional mixing and homogenization methods, which do not require a more detailed description here. According to the present invention, the emulsions are created with an average droplet size above 200 nm. The invention will now be illustrated by the following examples, without any restriction, in which the temperatures are indicated in degrees Celsius, the proportions of the ingredients are given in% by weight and the abbreviations have a usual meaning in the art.

Modalities of the Invention Examples 1 and 2 Preparation of transparent perfume compositions in the form of oil-in-water emulsions Oil / water type emulsions containing perfume bases are prepared with the ingredients below specified by common methods in the art.

Example 1 Ingredients' Parts by weight Perfumed base * 10.05 Silicon DC ® 345 1 24.93 Perfluorodecalin 2. 23 Water (pH 7) 21. 35 1, 2-Butanediol 36. 43 Tetronic ® 704 2) 2. 50 Abil ® Em 97 3) 2. 50 Total LOO. 00 1) origin: Dow Corning 2) origin: BASF AG 3) origin: Goldschmidt * The perfume base was obtained by mixing the following ingredients: Ingredients Parts by weight Citronellyl acetate 3 Geranyl acetate 9 Linalyl acetate 276 10% CIOD aldehyde * 3 10% C12 aldehyde * 12 Methyl anthranilate 16 Bergamot essential oil 226 Cetalox ® 5 Lemon essential oil 318 Dihydromyrcenol 2) 60 Dipropylene Glycol 20 Elemi 3) at 10% * 20 Fleuria 41063 B 4) 3 Ethyl Linalool 66 3- (4-Methoxyphenyl) -2- 30 methylpropanal 4) 10% * Geraniol 6 Habanolide ® 5) at 50% * 130 Hediona ® 6) 215 Hediona ® HC 7) 72 % indole ** 12 Iso E super 85 Dense essential oil of 26 Lavandin Liffaro e 9) to V-20 Linalol 40 Tangerine essential oil 5 Sfuma Peppermint essential oil 30 Crinkled to 10% * Bigarade essential oil 130 Neroli Orange essential oil 80 Portugal Florida Fenetilol Essential oil Petitgrain 63 Pipol 5 Essential oil Rosemary 16 Terpineol 9 Essential oil of violet 50 Zestover 10) to 1% * 30 Total 2100 * in dipropylene glycol ** in triethanolamine 1) 8, 12-epoxy-13, 14, 15, 16-tetranorlabdane 2) origin: International Flavors añd Fragrances, USA 3) 5-allyl-1,2,3-trimethoxybenzene; origin: Chalchauvet, Grasse, France 4) origin: Firmenich SA, Geneva, Switzerland 5) pentadecenolide; Origin: Firmenich SA, Geneva, Switzerland 6) methyl dihydrojasmonate; origin; Firmenich SA, Geneva, Switzerland 7) methyl dihydrojasmonate with high cis isomer content; origin: Firmenich SA, Geneva, Switzerland) 1- (octahydro-2, 3, 8, 8-tetramethyl-2-naphthalenyl) -1-ethanone; origin: International Flavors and Fragrances, USA) 3-hexenyl methyl carbonate; origin: International Flavors and Fragrances, USA 0) 9-decen-l-ol; origin: International Flavors and Fragrances, USA The refractive index of each of the two phases of the composition was measured at room temperature, once the aqueous phase and the oil phase were put in contact and before the addition of the surfactant . The refractive index n of the aqueous phase was 1.4098 and that of the oil phase was 1.4112, thus forming a transparent emulsion. The transmission of the emulsion, measured at a wavelength of 600 nm in a 1 cm thick cell, is 91.5%.

Example 2 Ingredients Parts by weight Base of perfume * 10.29 Silicone DC ® 345 1J 23.22 Perfluorodecalin 2.14 Water (pH 7) 22. 29 1, 2-Butanediol 38. 06 DC 193 2) 2. 00 DC 3225C 2) 2. 00 Total 100. 00 1) See example 1 2) Origin: Dow Corning * The perfume base was obtained by mixing the following ingredients: Ingredients Parts by weight Benzyl acetate 250 Pipol acetate 70 Stiralyl acetate 230 Phenylacetic aldehyde 10 Ambrettolide 1) 10 Astrotone 300 Bergamot essential oil 1160 ß-Ionone 550 Cassis 150 essential oil Cetalox ® 2) 50% * 60 Lemon essential oil 850 Citronelol 210 Damascenone 20 4-Decanolide 20 Dihydromyrcenol 3 > 440 Dipropylene glycol 20 Ethyl Linalool 720 7-Methyl-2H, 4H-1,5- 100 benzodioxepin-3-one) Floralozona ® 5 50 3- (4-Methoxyphenyl) -2- 170 methylpropanal 4) Fructona ® 6) 100 Galbex ® 4) 50? -Damascona 5 Geranium essential oil 30 Grape essential oil 100 Habanolida ® 7) 1120 Hediona ® 8) 2890 Hediona ® HC 9 > 950 Heliopropanal 10) 400 Indole 35 Iso E Super 11) 380 Thick essential oil of 40 Lavender Liffaroma ® 12) 1 Lilial ® 13) 1050 Lyral ® 14) 430 Tangerine essential oil 270 Sfuma Melonal 15) 3 Peppermint essential oil 20 Crinkled Peony 434017 4) 60 White peony HS 100001 4) 200 Fenetilol 80 Phenilhexanol 50 Pipol 20 Orange essential oil 500 Rosalba 16 > 4 Benzyl salicylate 400 Pipol salicylate 400 BHT 1) at 10% ** 200 Zestover 18) 22 Total 15200 * in 2- (2-ethoxyethoxy) -1-ethanol ** in propylene glycol 1) origin: Givaudan-Roure SA, Vernier, Switzerland 2) 8, 12-epoxy-13, 14, 15, 16-tetranorlabdane; origin-: Firmenich SA, Geneva, Switzerland 3) origin: International Flavors and Fragrances Inc., USA 4) origin: Firmenich SA, Geneva, Switzerland 5) 3- (4-ethylphenyl) -2, 2-dimethylpropanal + 3- ( 2-ethylphenyl) -2,2-dimethylpropanal; origin: International Flavors and Fragrances Inc., USA 6) 2-methyl-l, 3-dioxalan-2-ethylacetate; origin International Flavors and Fragrances Inc., USA 7) pentadecenolide; origin: Firmenich SA, Geneva, Switzerland) methyldihydrojasmonate; origin: Firmenich SA, Geneva, Switzerland 9) methyl dihydrojasmonate with high cis isomer content; origin: Firmenich SA, Geneva, Switzerland 10) 3- (1, '3-benzodioxol-5-yl) -2-methylpropanal; origin: Firmenich SA, Geneva, Switzerland 11) 1- (octahydro-2, 3, 8, 8-tetramethyl-2-naphthalenyl) -1-ethanone; Origin: International Flavors and Fragrances Inc., USA 12) 3-hexyl methyl carbonate; origin: International Flavors and Fragrances Inc., USA 13) 3- (4-tert-butylphenyl) -2-methylpropanal; origin Givaudan-Roure SA, Vernier, Switzerland 14) 4- (4-hydroxy-4-methylphenyl) -3-cyclohexane-1-carbaldehyde + 3- (4-hydroxy-4-methylphenyl) -3-cyclohexane-1-carbaldehyde; origin: International Flavors and Fragrances Inc., USA 15) 2, 6-dimethyl-5-heptanal; origin: Givaudan-Roure SA, Vernier, Switzerland 16) 9-decade-l-ol; origin: International Flavors and Fragrances Inc., USA 17) 2, 6-di-tert-butyl-4-hydroxytoluene 18) 2,4-dimethyl-3-cyclohexane-1-carbaldehyde; origin: Fimenich SA, Geneva, Switzerland The refractive index of each of the two phases of the composition was measured at room temperature, once the aqueous phase and the oil phase were brought into contact and before the addition of the surfactant . The refractive index n of the aqueous phase was 1.4109 and that of the oil phase was 1.4132. thus providing a transparent emulsion.

The transmission of the emulsion, measured at a wavelength of 600 nm in a 1 cm thick cell, is 98.2%.

Examples 3 and 4 Preparation of transparent perfume compositions in the form of emulsions water eri oil Water / oil type emulsions containing perfume bases are prepared with the ingredients below specified by the methods common in the art.

Example 3 Ingredients Parts by weight Perfume base * 10.20 Silicon DC ® 345 ll 55. 12 Perfluorodecalin 4. 17 Water (pH 7) 11. 55 1, 2-Butanediol 6. 96 Abil® EM 97 2. 00 Total LOO. 00 1) see example 1 2) origin: Goldschmidt 3) * see example 1 The refractive index of each of the two phases of the composition was measured at room temperature, once the aqueous phase and the oil phase were brought into contact and before the addition of the surfactant. The refractive index n of the aqueous phase was 1.4050 and that of the oil phase was 1.4070, thus forming a transparent emulsion. The transmission of the emulsion was measured at a wavelength of 600 nm in a 1 cm thick cell, it is 65.4%.

Example 4 Ingredients Parts by weight Perfumed base 10.20 Silicon DC ® 3451 '55.12 Perfluorodecaline 4. 17 Water (pH 7) 11. 55 1, 2-Butanediol 16. 96 Total 100.00 1) see example 1 2) see example 3 * see example 2 The refractive index of each of the two phases of the composition was measured at room temperature, once the aqueous phase and the oil phase were brought into contact and before the addition of the surfactant. The refractive index n of the aqueous phase was 1.4075 and that of the oil phase was 1.4068, thus forming a transparent emulsion. The transmission of the emulsion was measured at a wavelength of 600 nm in a 1 cm thick cell, it is 58.8%. By mixing the above-mentioned ingredients a stable perfume composition was obtained in the form of a water-in-oil emulsion.

It is noted that in relation to this date, the best method known to the applicant, to carry out the said invention is that which is clear from the objects to which it refers Having described the invention as above, Property is claimed as contained in the following:

Claims (15)

1. A perfume composition in the form of an oil-in-water or water-in-oil emulsion, wherein the oil contains at least one perfume ingredient, said composition characterized in that it contains from 5 to 50% by weight of a dispersed phase and from 95 to 50% by weight of a continuous phase, the difference between the refractive index n of the dispersed phase and the continuous phase is less than or equal to 0.003, preferably less than or equal to 0.001.

2. The perfume composition according to claim 1, characterized in that the viscosity of the emulsion is less than 10 Pa.s.

3. The perfume composition according to claim 1 or 2, characterized in that the difference between the refractive indexes is obtained by the effect of a substance capable of changing the refractive index of one or the other of the two phases.

4. The perfume composition according to claims 1 and 2 or 3, characterized in that the substance acting in the oil phase is a liquid agent having a refractive index less than or equal to about 1.43 and the substance acting in the aqueous phase it is a liquid agent that has a refractive index n of greater than or equal to about 1.40.

5. The perfume composition according to claim 4, characterized in that the refractive index of the liquid substance acting on the oil phase is less than or equal to about 1.40 and the refractive index of the liquid substance acting on the phase aqueous is above or equal to approximately 1.43.

6. The perfume composition according to any of claims 1 to 5, characterized in that the substance acting on the oil phase is selected from volatile silicones having a vapor pressure higher than that of ethanol, a paraffin or a fluorinated paraffin or perfluorinated

7. The perfume composition according to claim 6, characterized in that the volatile silicone is a linear or cyclic polydimethylsiloxane having from 2 to 10 silicon atoms.

8. The perfumed composition according to claim 6, characterized in that the aforementioned silicone is octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane or dodecamethylcyclohexasiloxane.

9. The perfume composition according to any of the following claims 1 to 8, characterized in that said substance acting on the aqueous phase is selected from among the diols, triols or polyols of mono-oligo or polymer nature, or a derivative of the same, or urea.

10. The perfume composition according to claim 9, characterized in that said aforementioned diol, triol or polyol is ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,4-butanediol, 2, 3-butanediol, 2-methyl-1,3-propanediol, 1,6-hexanediol, neopentyl glycol, trimethylolpropane, glycerol, diethylene glycol, triethylene glycol, dipropylene glycol, or polyethylene glycol having a varied chain length, or a glyceryl polymethacrylate.

11. The perfume composition according to claim 10, characterized in that the diol is 1,2-butanediol.

12. The perfue composition according to any of claims 1 to 11, characterized in that these contain between 0 and 8% by weight of a surfactant.

13. The perfume composition according to claim 12, characterized in that the surfactant is present in an amount of 0.1 to 5% by weight.

14. The perfume composition according to claim 12 or 13, characterized in that the aforementioned surfactant is nonionic.

15. The perfume composition according to any of claims 1 to 14, characterized in that they are in the form of a perfume or a cologne.