Fragrant three phase emulsion composition

Abstract

To provide an aromatic three phase emulsified composition which uses an emulsifier for three phase emulsification having stable emulsifying ability to an oil species to be emulsified, has good emulsion stability, and is more excellent in aromatic characteristics than before.SOLUTION: The oily three phase emulsion composition comprises an oil phase containing an aromatic component, an aqueous phase, and an emulsifier for three phase emulsification having a light scattering intensity of 950 or more at 25 °C of a dispersion liquid obtained by dispersing 1% by mass of the emulsifier in an oily material constituting the oil phase, and an average particle size of 8. 0nm or more and 400. 0nm or less when dispersed in water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a fragrance three-phase emulsion composition. [Background technology]

[0002] Aroma components have been used in a variety of fields.

[0003] For example, Patent Document 1 describes an emulsified flavor preparation that is easy to add to food and that retains its aroma even when the food is heated. This emulsified flavor preparation is a W / O type emulsified flavor preparation that contains an oil phase that contains fats and oils and an emulsifier and is liquid at room temperature, and an aqueous phase that is dispersed in the oil phase in the form of particles and contains water, inorganic salts, ethanol, and a flavor component, and the average particle size of the aqueous phase is 10 μm or less in mode diameter.

[0004] Meanwhile, a different emulsification method from Patent Document 1 is the three-phase emulsification method, in which an emulsifier for three-phase emulsification is attached to the surface of the internal phase by van der Waals forces. Patent Document 2, for example, describes an emulsification technique using the three-phase emulsification method, which is a water-in-oil (W / O) emulsion containing an inverted vesicle formed by a sucrose fatty acid ester as an emulsifier, and which also contains a nonionic surfactant other than the sucrose fatty acid ester. In Patent Document 2, the emulsion stability of the water-in-oil (W / O) emulsion obtained by the three-phase emulsification method is evaluated by visually observing the emulsified state of the emulsion after it has been left to stand for a predetermined period of time.

[0005] However, not only in the technology disclosed in Patent Document 2, but also in other technologies, emulsion stability must be confirmed solely after the preparation of a three-phase emulsion composition. Generally, emulsifiers used in three-phase emulsification are assumed to be hydrophilic nanoparticles that are insoluble in both water and oil. However, depending on the type of oil, some emulsifiers may appear to be in a stable emulsion state at the beginning of emulsification but dissolve these hydrophilic nanoparticles over time. If the hydrophilic nanoparticles that should have been present at the oil-water interface dissolve, the emulsion naturally becomes unstable, and ultimately the emulsion itself cannot be maintained.

[0006] In particular, when the oil to be emulsified is a mixed oil such as a fragrance, the ingredients and detailed composition are not clearly specified, making it difficult to know whether the emulsifier will dissolve in the oil. Furthermore, some aroma components are soluble in water, and since water-soluble aroma components are extracted into water, the composition of the oily components may change due to emulsification. In view of this situation, the present invention proposes, using indicators, the physical properties that an emulsifier to be used for a specific oil type must possess in order to maintain stable emulsion before three-phase emulsification. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-132595 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-16668 Summary of the Invention [Problem to be solved by the invention]

[0008] An object of the present invention is to provide an aromatic three-phase emulsion composition that has good emulsion stability and is superior in aroma characteristics to conventional compositions, by using an emulsifier for three-phase emulsification that has stable emulsification ability for the type of oil to be emulsified. [Means for solving the problem]

[0009] [1] An aromatic three-phase emulsion composition comprising an oil phase containing an aroma component, an aqueous phase, and an emulsifier for three-phase emulsification, which is dispersed in an oily substance constituting the oil phase at 1% by mass to obtain a dispersion having a light scattering intensity (DLS) of 950 or more at 25°C, and which has an average particle size of 8.0 nm or more and 400.0 nm or less when dispersed in water. [2] The aromatic three-phase emulsion composition according to [1] above, wherein the aromatic three-phase emulsion composition is an O / W type emulsion. [3] The fragrant three-phase emulsion composition according to [1] or [2] above, wherein the emulsifier for three-phase emulsification is present at the interface between the oil phase and the aqueous phase. [4] The fragrant three-phase emulsion composition according to any one of [1] to [3] above, wherein the emulsifier for three-phase emulsification comprises sodium dilauroyl glutamate lysine and phytantriol. [5] The aromatic three-phase emulsion composition according to any one of [1] to [3] above, wherein the emulsifier for three-phase emulsification comprises an unsaturated fatty acid, a basic amino acid, and at least one of a ceramide and a sterol. [6] The aromatic three-phase emulsion composition according to [5] above, wherein the unsaturated fatty acid is a monounsaturated fatty acid or a polyunsaturated fatty acid. [7] The aromatic three-phase emulsion composition according to [5] or [6] above, wherein the basic amino acid is at least one of lysine and L-arginine. [8] The fragrant three-phase emulsion composition according to any one of [5] to [7] above, wherein the ceramide is one or more selected from the group consisting of human ceramide, plant ceramide, and pseudo-ceramide. [9] The aromatic three-phase emulsion composition according to any one of the above [5] to [8], wherein the sterol is at least one of cholesterol and phytosterol.

[10] The fragrant three-phase emulsion composition according to any one of the above [1] to [3], wherein the emulsifier for three-phase emulsification comprises sodium dilauroyl glutamate lysine and cholesterol.

[11] The fragrant three-phase emulsion composition according to any one of the above [1] to

[10] , which is for use in cosmetics.

[12] The fragrant three-phase emulsion composition according to any one of the above [1] to

[10] , which is for use as a fragrance. [Effects of the Invention]

[0010] According to the present invention, an aromatic three-phase emulsion composition can be provided that has good emulsion stability and more excellent aroma characteristics than conventional compositions, by using an emulsifier for three-phase emulsion that has stable emulsification ability for the oil type to be emulsified. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a detailed description will be given based on an embodiment.

[0012] As a result of extensive research, the present inventors have found that the light scattering intensity at 25°C of a dispersion obtained by dispersing an emulsifier for three-phase emulsification in an oily substance containing aroma components to be three-phase emulsified, within a predetermined range, is an indicator for judging the emulsion stability of an aromatic three-phase emulsion composition. They have also found that when the light scattering intensity is within the predetermined range and the average particle size of the emulsifier for three-phase emulsification when dispersed in water is within the predetermined range, the aromatic three-phase emulsion composition has good emulsion stability and is superior in aroma characteristics to conventional compositions. Based on these findings, the present invention has been completed.

[0013] The aromatic three-phase emulsion composition of the present embodiment comprises an oil phase containing an aroma component, an aqueous phase, and an emulsifier for three-phase emulsification, which is dispersed in an oily substance constituting the oil phase at 1% by mass to obtain a dispersion having a light scattering intensity of 950 or more at 25°C, and which has an average particle size of 8.0 nm or more and 400.0 nm or less when dispersed in water.

[0014] The fragrant three-phase emulsion composition contains an oil phase, a water phase, and an emulsifier for three-phase emulsification, and is an O / W (oil-in-water) emulsion.

[0015] In the aromatic three-phase emulsion composition, which is an O / W emulsion, a plurality of emulsifiers for three-phase emulsion (hydrophilic nanoparticles) are present around the oil phase, which is the internal phase, and an aqueous phase, which is the external phase, is present outside of the oil phase. That is, a plurality of emulsifiers for three-phase emulsion, which are hydrophilic nanoparticles, are present at the interface between the oil phase and the aqueous phase, and the aqueous phase is the continuous phase.

[0016] In the aromatic three-phase emulsion composition, a large number of emulsion particles, each of which is composed of oil droplets constituting the oil phase surrounded by a large number of hydrophilic nanoparticles smaller than the oil droplets, are stably dispersed in the aqueous phase, which is the continuous phase.

[0017] The emulsifier for three-phase emulsification is at least one of closed vesicles (hereinafter simply referred to as closed vesicles) formed by an amphiphilic substance that spontaneously forms closed vesicles, and particles of polycondensation polymers having hydroxyl groups (hereinafter simply referred to as polycondensation polymer particles). Closed vesicles have the property of spontaneously forming closed vesicles in an aqueous component. Furthermore, polycondensation polymer particles include single particles of polycondensation polymers and particles formed by connecting single particles of polycondensation polymers, but do not include aggregates (having a network structure) of polycondensation polymers before they are broken down into single particles.

[0018] Three-phase emulsifiers (particles of closed vesicles and polycondensation polymers), which are hydrophilic nanoparticles, are known as particles with three-phase emulsification ability. Because the surfaces of hydrophilic nanoparticles are hydrophilic, repulsive forces are generated between the hydrophilic nanoparticles. The preparation method for hydrophilic nanoparticles (particles of closed vesicles and polycondensation polymers) is similar to the preparation method for particles with three-phase emulsification ability, such as that described in Patent No. 3855203.

[0019] The presence of numerous hydrophilic nanoparticles on the surface of the particulate oil phase, i.e., the surface of the oil phase is covered with numerous hydrophilic nanoparticles, generates a repulsive force between emulsion particles. The repulsive force generated between emulsion particles is stronger than the attractive force generated between emulsion particles. Therefore, aggregation of emulsion particles in the aqueous phase is suppressed, and the dispersibility of the emulsion particles is maintained and improved.

[0020] In the three-phase emulsification method, multiple hydrophilic nanoparticles adhere to the oil phase (internal phase) through van der Waals forces, interposing themselves at the interface between the oil phase (internal phase) and the aqueous phase (external phase), enabling emulsification of the oil and aqueous phases. This three-phase emulsification mechanism is completely different from the emulsification mechanism using surfactants, which maintain an emulsified state by directing hydrophilic and hydrophobic groups toward the aqueous and oil phases, respectively, thereby lowering the interfacial tension between the oil and water (see, for example, Japanese Patent Publication No. 3855203).

[0021] As described above, the fragrance three-phase emulsion composition employs a three-phase emulsification technique that is completely different from the emulsification mechanism using surfactants. Therefore, the fragrance three-phase emulsion composition can maintain a stable emulsified state even without containing a surfactant. Thus, the fragrance three-phase emulsion composition can significantly reduce the amount of surfactant compared to emulsions that use surfactants, and in some cases can even eliminate the use of surfactants.

[0022] Furthermore, the emulsion particles contained in the aromatic three-phase emulsion composition can be confirmed by observing them with an atomic force microscope (AFM) to confirm that hydrophilic nanoparticles are attached to the surface of the oil phase, which is the internal phase.

[0023] The oil phase constituting the fragrant three-phase emulsion composition contains a fragrance component. The fragrance component has a fragrance and may be a natural component or a synthetic component. Furthermore, the fragrance component may be composed of only one substance or two or more substances. For example, fragrance components include fragrances. Examples of fragrances include natural fragrances including plant-based fragrances such as essential oils and animal-based fragrances, synthetic fragrances such as those made from petroleum-based raw materials using chemical reactions, and compound fragrances that are mixtures of natural fragrances and synthetic fragrances.

[0024] Examples of essential oils include lavender oil, orange oil containing limonene as the main component (hereinafter simply referred to as orange oil), rosemary oil such as rosemary leaf oil, and eucalyptus lemon oil (Eucalyptus citriodora).

[0025] The aromatic substances contained in essential oils include organic chemicals such as hydrocarbons such as monoterpene hydrocarbons and sesquiterpene hydrocarbons, alcohols such as monoterpene alcohols, sesquiterpene alcohols and diterpene alcohols, aldehydes such as terpene aldehydes, aliphatic aldehydes and aromatic aldehydes, ketones such as terpene ketones and cyclic ketones, phenols, phenol ethers, esters such as aliphatic esters and aromatic esters, oxides, lactones, carboxylic acids, etc.

[0026] Synthetic fragrances include Green Osmanthus AB81646, Esthe Royer 57729, Afternoon Jasmine AD85639, Morning Citrus AD85640, Island Forest AD26589, and Watery Shampoo BR21010.

[0027] The oil phase may further contain an oily component other than the aroma component. The oily component other than the aroma component may be a liquid oil, a solid oil, or a mixture of a solid oil and a liquid oil, but is preferably a liquid oil. A liquid oil is an oil that is liquid at room temperature (25°C), and a solid oil is an oil that is solid at room temperature.

[0028] Liquid oils include vegetable oils (olive oil, avocado oil, camellia oil, macadamia nut oil, evening primrose oil, jojoba oil, rapeseed oil, egg yolk oil, sesame oil, castor oil, safflower oil, cottonseed oil, soybean oil, tea seed oil, rice bran oil, wheat germ oil, wheat germ oil, peanut oil, sunflower oil, almond oil, turtle oil, corn oil, mink oil, persic oil, camellia oil, linseed oil, perilla oil, and kaya oil), medium-chain fatty acid triglycerides, hydrocarbon oils (squalene, squalane, liquid paraffin, and the like), ester oils (ethylhexyl methoxycinnamate, cetyl ethylhexanoate, diisostearyl malate, isopropyl myristate, ethylhexyl palmitate, octyl palmitate, octyl isopalmitate, isononyl isononanoate, isotope isononanoate, and the like). Examples of suitable oils include glyceryl tri(caprylic / capric acid), triethylhexanoin, neopentyl glycol dicaprate, cetyl octanoate, isocetyl stearate, isopropyl isostearate, isodecyl oleate, glyceryl tri-2-ethylhexanoate, pentaerythrityl tetra-2-ethylhexanoate, 2-ethylhexyl succinate, and diethyl sebacate, as well as silicone oils (cyclopentasiloxane, decamethylcyclopentasiloxane, methylpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, and dodecamethylcyclohexasiloxane).

[0029] Examples of solid oils include shea butter, coconut oil, petrolatum, beeswax, stearyl alcohol, cetanol, behenyl alcohol, macadamia nut oil fatty acid phytosteryl, dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl), and hydrogenated castor oil isostearate.

[0030] The content ratio of the oil phase relative to the total mass of the aromatic three-phase emulsion composition is appropriately selected depending on the intended use of the aromatic three-phase emulsion composition. Furthermore, when the content ratio of the aroma components relative to the total mass of the aromatic three-phase emulsion composition is 5.0% by mass or more, the aroma is sufficiently strong and lasts for a long time. Furthermore, the upper limit of the content ratio of the aroma components is appropriately selected depending on the intended use of the aromatic three-phase emulsion composition, and is, for example, 10.0% by mass or less.

[0031] The average particle size of emulsion particles in the aromatic three-phase emulsion composition is appropriately selected depending on the intended use of the aromatic three-phase emulsion composition. Because the aromatic three-phase emulsion composition is a three-phase emulsion, the average particle size of emulsion particles can be controlled within a wider range than emulsion compositions using surfactants. For example, the average particle size of emulsion particles in the aromatic three-phase emulsion composition is 0.10 μm or more, and may be 100 μm or more. The average particle size of emulsion particles may be, for example, 50.00 μm or less, 25.00 μm or less, or 10.00 μm or less. The average particle size of emulsion particles can be measured by dynamic light scattering using a particle size distribution analyzer FPAR (manufactured by Otsuka Electronics Co., Ltd.) and obtained by Contin analysis.

[0032] The aqueous phase constituting the fragrance three-phase emulsion composition is an aqueous substance, is not mixed with the oil phase, is a continuous phase, and disperses a plurality of emulsion particles. The aqueous phase is, for example, water.

[0033] The content ratio of the aqueous phase to the total mass of the fragrant three-phase emulsion composition is appropriately selected depending on the intended use of the fragrant three-phase emulsion composition.

[0034] In the aromatic three-phase emulsion composition, a dispersion (hereinafter simply referred to as dispersion) obtained by dispersing 1% by mass of an emulsifier for three-phase emulsification in the substance to be emulsified, i.e., the oily substance constituting the oil phase of the aromatic three-phase emulsion composition, has a light scattering intensity of 950 or more at 25°C, and when the emulsifier for three-phase emulsification is dispersed in water, the average particle size of the hydrophilic nanoparticles (hereinafter simply referred to as average particle size of hydrophilic nanoparticles) is 8.0 nm or more and 400.0 nm or less. The oily substance may be composed of only aroma components, or may be composed of aroma components and oily components other than aroma components.

[0035] The light scattering intensity of the dispersion is measured by adding 1% by mass of an emulsifier for three-phase emulsification to the oily substance constituting the oil phase of the aromatic three-phase emulsion composition and stirring for 24 hours to obtain a dispersion, which has a light scattering intensity (DLS) of 950 or more at 25°C.

[0036] The light scattering intensity of the dispersion was measured using a particle size / molecular weight measurement system (ELS-Z, manufactured by Otsuka Electronics Co., Ltd.) by filling a square glass cell (optical path length 10 mm, optical path width 10 mm) with the dispersion, setting the glass cell in the ELS-Z sample holder, fully opening the slit width (100%), and setting the temperature of the dispersion to 25°C.

[0037] In addition, the average particle size of hydrophilic nanoparticles when the emulsifier for three-phase emulsification is dispersed in water is measured by dynamic light scattering using a particle size distribution analyzer FPAR (manufactured by Otsuka Electronics Co., Ltd.) and determined by Contin analysis.

[0038] When the light scattering intensity is 950 or higher, it becomes possible to stably maintain a three-phase emulsion state when the oily substance is three-phase emulsified using the emulsifier for three-phase emulsification. In other words, by using the light scattering intensity of the dispersion as an indicator, it is possible to determine whether a stable aroma three-phase emulsion composition can be obtained, thereby avoiding situations where conventional three-phase emulsion compositions become unstable over time. Furthermore, when the light scattering intensity is 950 or higher and the average particle size of the hydrophilic nanoparticles is 8.0 nm or more and 400.0 nm or less, the aroma three-phase emulsion composition not only has good emulsion stability but also superior aroma characteristics compared to conventional aroma emulsion compositions.

[0039] From the viewpoint of these effects, the light scattering intensity is 950 or more, preferably 1000 or more, and more preferably 1300 or more.

[0040] In order to further enhance the above-mentioned effects, the emulsifier for three-phase emulsification preferably contains sodium dilauroyl glutamate lysine and phytantriol, and may consist solely of sodium dilauroyl glutamate lysine and phytantriol.

[0041] In order to further enhance the above-mentioned effects, other three-phase emulsifiers preferably contain an unsaturated fatty acid, a basic amino acid, and at least one of a ceramide and a sterol. Such three-phase emulsifiers may contain only ceramide, only sterol, or both ceramide and sterol, as amphipathic oils. Furthermore, such three-phase emulsifiers may consist of only unsaturated fatty acid, a basic amino acid, and at least one of a ceramide and a sterol.

[0042] The unsaturated fatty acid is preferably a monounsaturated fatty acid or a polyunsaturated fatty acid, and among these, oleic acid, linoleic acid, and linolenic acid are more preferred.

[0043] The basic amino acid is preferably at least one of lysine and L-arginine, and may be lysine alone, L-arginine alone, or both lysine and L-arginine.

[0044] The ceramide is preferably one or more selected from the group consisting of human ceramide, plant ceramide, and pseudoceramide. Among them, ceramide 2, ceramide 3, ceramide 5, glycoceramide, and pseudoceramide are more preferable. For example, the ceramide may be only human ceramide, or may be both plant ceramide and pseudoceramide.

[0045] The sterol is preferably at least one of cholesterol and phytosterol. The sterol may be cholesterol alone, phytosterol alone, or both cholesterol and phytosterol.

[0046] In order to further enhance the above-mentioned effects, it is preferable that the emulsifier for three-phase emulsification further contains sodium dilauroyl glutamate lysine and cholesterol. Such an emulsifier for three-phase emulsification may consist only of sodium dilauroyl glutamate lysine and cholesterol.

[0047] Furthermore, the aromatic three-phase emulsion composition may further contain various ingredients in addition to the above-mentioned ingredients, as long as the above-mentioned effects of this embodiment are not reduced.

[0048] Such a fragrant three-phase emulsion composition has excellent fragrance properties including fragrance release, fragrance persistence, skin irritation, and moisturizing properties, and is therefore suitable for use in cosmetics and fragrances.

[0049] Next, a method for producing the above-mentioned fragrant three-phase emulsion composition will be described.

[0050] In the method for producing an aromatic three-phase emulsion composition, based on a three-phase emulsification technique, an emulsifier dispersion in which a plurality of particulate emulsifiers for three-phase emulsification (hydrophilic nanoparticles) are dispersed in an aqueous substance is stirred with a stirrer or the like while an oily substance is added to the emulsifier dispersion, thereby forming a plurality of emulsion particles, and an aromatic three-phase emulsion composition containing a plurality of emulsion particles dispersed in the aqueous phase is obtained.

[0051] The emulsifier dispersion may be prepared by adding a particulate three-phase emulsifier (hydrophilic nanoparticles) to an aqueous substance while stirring the aqueous substance with a stirrer or the like, thereby forming the particulate three-phase emulsifier (hydrophilic nanoparticles), thereby obtaining the emulsifier dispersion, or by adding a particulate three-phase emulsifier (hydrophilic nanoparticles) to the aqueous substance while stirring the aqueous substance with a stirrer or the like, thereby obtaining the emulsifier dispersion, or by the method described in Japanese Patent No. 3855203. Other examples of the method for preparing the emulsifier dispersion include the following.

[0052] A dispersion of an emulsifier for three-phase emulsification containing sodium dilauroyl glutamate lysine and phytantriol can be obtained as follows: Specifically, sodium dilauroyl glutamate lysine solution, phytantriol, and pentylene glycol are dissolved, and then water is added and mixed to obtain an emulsifier dispersion in which a plurality of particulate emulsifiers for three-phase emulsification (hydrophilic nanoparticles) are dispersed.

[0053] Furthermore, a dispersion of an emulsifier for three-phase emulsification containing an unsaturated fatty acid, a basic amino acid, and at least one of a ceramide and a sterol can be obtained by a method including a heating and dissolving step and a stirring step.

[0054] In the heat dissolution step, an unsaturated fatty acid and at least one of a ceramide and a sterol are heated and dissolved to obtain a mixed solution. The mixed solution contains the unsaturated fatty acid and at least one of a ceramide and a sterol. The heat dissolution temperature in the heat dissolution step is not particularly limited, as long as it is a temperature at which the unsaturated fatty acid and at least one of a ceramide and a sterol can be sufficiently dissolved and these substances are not denatured.

[0055] In addition, in the heat dissolution step, a mixed solution may be obtained by heat dissolving an unsaturated fatty acid, at least one of a ceramide and a sterol, and a co-solvent. When heat dissolving an unsaturated fatty acid, at least one of a ceramide and a sterol, the use of a co-solvent makes it easier to obtain a mixed solution. The co-solvent is preferably butylene glycol, dipropylene glycol, or pentanediol.

[0056] In the stirring step performed after the heat dissolution step, the mixture obtained in the heat dissolution step is stirred with a basic amino acid aqueous solution to obtain an emulsifier dispersion in which a plurality of particulate emulsifiers for three-phase emulsification (hydrophilic nanoparticles) are dispersed. In the stirring step, a heated basic amino acid aqueous solution may be mixed with the mixture. The stirring conditions in the stirring step, such as the stirring speed and stirring temperature, are not particularly limited as long as hydrophilic nanoparticles can be obtained by stirring the mixture with the basic amino acid aqueous solution.

[0057] Furthermore, a dispersion of an emulsifier for three-phase emulsification containing sodium dilauroyl glutamate lysine and cholesterol can be obtained as follows: First, a sodium dilauroyl glutamate lysine solution is added to and mixed with an aqueous solution obtained by dissolving citric acid in water and heating the solution, then a heated mixture of dipropylene glycol and cholesterol is added and mixed, then an aqueous substance consisting of arginine and water is added and mixed, and the mixture is then cooled to obtain an emulsifier dispersion in which a plurality of particulate emulsifiers for three-phase emulsification (hydrophilic nanoparticles) are dispersed.

[0058] According to the embodiment described above, by using the light scattering intensity of the dispersion obtained by dispersing an emulsifier for three-phase emulsification in an oily substance containing aroma components to be three-phase emulsified as an indicator, it is possible to determine whether a stable aroma three-phase emulsion composition can be obtained, thereby avoiding situations that lead to the destabilization of three-phase emulsion compositions over time, as has been the case in the past. Furthermore, when the light scattering intensity of the dispersion is within a predetermined range and the average particle size of the emulsifier for three-phase emulsification when dispersed in water is within a predetermined range, the aroma three-phase emulsion composition not only has good emulsion stability but also has more excellent aroma characteristics than conventional aroma emulsion compositions.

[0059] Although the embodiments have been described above, the present invention is not limited to the above embodiments, but includes all aspects encompassed by the concept and scope of the claims of the present disclosure, and can be modified in various ways within the scope of the present disclosure. [Example]

[0060] Next, examples and comparative examples will be described, but the present invention is not limited to these examples.

[0061] (Examples 1-1 to 1-16 and Comparative Examples 1-1 to 1-3) A dispersion was prepared by stirring the substances shown in Tables 1 and 2 at 700 rpm for 24 hours using a stirrer. The resulting dispersion was then filled into a rectangular glass cell (10 mm optical path length, 10 mm optical path width) using a particle size and molecular weight measurement system (ELS-Z, manufactured by Otsuka Electronics Co., Ltd.). The glass cell was then placed in the ELS-Z sample holder, and the light scattering intensity was measured 50 times at a temperature of 25°C with the slit width fully open (100%). The average of the multiple measurements was calculated and used as the light scattering intensity (light quantity) of the dispersion. The results are shown in Tables 1 and 2.

[0062] The emulsifier for three-phase emulsification was dispersed in water and measured by dynamic light scattering using a particle size distribution analyzer FPAR (manufactured by Otsuka Electronics Co., Ltd.), and the average particle size of the emulsifier for three-phase emulsification (hydrophilic nanoparticles) in water was determined by Contin analysis. The results are shown in Tables 1 and 2.

[0063] [Table 1]

[0064] [Table 2]

[0065] Example 2-1 First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion containing multiple three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, lavender oil, the target of emulsification, was added and stirred for 10 minutes to emulsify the lavender oil. Next, phenoxyethanol, methylparaben, and disodium ethylenediaminetetraacetate dihydrate (EDTA2-Na) were added and mixed to obtain a fragrant three-phase emulsion composition with the composition shown in Table 3.

[0066] (Example 2-2) First, citric acid was dissolved in water and heated to 80°C, and sodium dilauroyl glutamate lysine solution (30% aqueous solution) was added and mixed, followed by a mixture of dipropylene glycol and cholesterol (heated to 80°C) and mixing, followed by an aqueous substance consisting of arginine and water and mixing, and then the mixture was cooled to obtain an emulsifier dispersion in which multiple emulsifiers for three-phase emulsification containing sodium dilauroyl glutamate lysine and cholesterol were dispersed. Next, lavender oil was added and stirred for 10 minutes while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, to obtain an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0067] (Example 2-3) First, oleic acid, cholesterol, and ceramide 2 were heated to 150°C and dissolved to obtain a mixed solution. Next, an L-arginine aqueous solution heated to 85°C was added to the mixed solution, mixed, and stirred at 85°C for 10 minutes. After stirring, the aqueous solution was cooled to 25°C to obtain an emulsifier dispersion in which a three-phase emulsifier composed of oleic acid, cholesterol, ceramide 2, and L-arginine was dispersed. Next, lavender oil was added to the emulsifier dispersion while stirring it with a homomixer at 8000 rpm at 25°C, and the mixture was stirred for 10 minutes to obtain an aromatic three-phase emulsion composition having the composition shown in Table 3.

[0068] (Examples 2-4) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion in which multiple three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol were dispersed. Next, orange oil, the target of emulsification, was added while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, and the mixture was stirred for 10 minutes to emulsify the orange oil. Next, phenoxyethanol was added and mixed to obtain a fragrant three-phase emulsion composition with the composition shown in Table 3.

[0069] (Examples 2-5) First, citric acid was dissolved in water and heated to 80°C, and sodium dilauroyl glutamate lysine solution (30% aqueous solution) was added and mixed. Next, a mixture of dipropylene glycol and cholesterol (heated to 80°C) was added and mixed. Next, an aqueous substance consisting of arginine and water was added and mixed, and the mixture was cooled to obtain an emulsifier dispersion in which multiple emulsifiers for three-phase emulsification containing sodium dilauroyl glutamate lysine and cholesterol were dispersed. Next, orange oil was added and stirred for 10 minutes while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, to obtain a fragrant three-phase emulsion composition with the composition shown in Table 3.

[0070] (Examples 2-6) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion in which multiple three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol were dispersed. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, (R)-(+)-limonene, the target of emulsification, was added and stirred for 10 minutes to emulsify the limonene. Next, phenoxyethanol was added and mixed to obtain an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0071] (Examples 2-7) First, citric acid was dissolved in water and heated to 80°C, and sodium dilauroyl glutamate lysine solution (30% aqueous solution) was added and mixed. Next, a mixture of dipropylene glycol and cholesterol (heated to 80°C) was added and mixed. Next, an aqueous substance consisting of arginine and water was added and mixed, and the mixture was cooled to obtain an emulsifier dispersion in which multiple emulsifiers for three-phase emulsification containing sodium dilauroyl glutamate lysine and cholesterol were dispersed. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, (R)-(+)-limonene was added and stirred for 10 minutes to obtain an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0072] (Examples 2-8) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion in which multiple emulsifiers for three-phase emulsification containing sodium dilauroyl glutamate lysine and phytantriol were dispersed. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, rosemary leaf oil, the target of emulsification, was added and stirred for 10 minutes to emulsify the rosemary leaf oil. Next, phenoxyethanol was added and mixed to obtain an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0073] (Examples 2-9) First, citric acid was dissolved in water and heated to 80°C, and sodium dilauroyl glutamate lysine solution (30% aqueous solution) was added and mixed. Next, a mixture of dipropylene glycol and cholesterol (heated to 80°C) was added and mixed. Next, an aqueous substance consisting of arginine and water was added and mixed, and the mixture was cooled to obtain an emulsifier dispersion in which multiple emulsifiers for three-phase emulsification containing sodium dilauroyl glutamate lysine and cholesterol were dispersed. Next, rosemary leaf oil was added while stirring the emulsifier dispersion in a homomixer at 8000 rpm and 25°C, and stirring was continued for 10 minutes to obtain an aromatic three-phase emulsion composition shown in Table 3.

[0074] (Examples 2-10) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion in which multiple emulsifiers for three-phase emulsification containing sodium dilauroyl glutamate lysine and phytantriol were dispersed. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, Eucalyptus citriodora, the target of emulsification, was added and stirred for 10 minutes to emulsify the Eucalyptus citriodora. Next, phenoxyethanol was added and mixed to obtain a fragrant three-phase emulsion composition with the composition shown in Table 3.

[0075] (Comparative Example 2-1) An emulsifier dispersion in which multiple closed vesicles formed by a derivative of polyoxyethylene hydrogenated castor oil (HCO-10), an amphiphilic substance that spontaneously forms closed vesicles, are dispersed in an aqueous substance consisting of phenoxyethanol and water was stirred in a homomixer at 8,000 rpm at 25°C, while (R)-(+)-limonene was added and stirred for 10 minutes, thereby obtaining an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0076] (Comparative Example 2-2) An emulsifier dispersion in which multiple closed vesicles formed from a derivative of polyoxyethylene hydrogenated castor oil, an amphiphilic substance that spontaneously forms closed vesicles, were dispersed in water was stirred in a homomixer at 8000 rpm at 25°C, while lavender oil was added and stirred for 10 minutes, thereby obtaining a fragrant three-phase emulsion composition with the composition shown in Table 3.

[0077] (Comparative Example 2-3) An emulsifier dispersion in which multiple closed vesicles formed by decaglyceryl distearate (2S10G), an amphiphilic substance that spontaneously forms closed vesicles, were dispersed in water was stirred in a homomixer at 8000 rpm and 25°C, while citronella was added and stirred for 10 minutes, thereby obtaining a fragrant three-phase emulsion composition with the composition shown in Table 3.

[0078] (Example 2-11) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion containing a plurality of three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, the target substance, Green Osmanthus AB81646, was added and stirred for 10 minutes to emulsify the target substance. Next, phenoxyethanol, methylparaben, and disodium ethylenediaminetetraacetate dihydrate were added and mixed to obtain a fragrance three-phase emulsion composition with the composition shown in Table 4.

[0079] (Example 2-12) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion in which multiple three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol were dispersed. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, the target ESTHE ROYER 57729 was added and stirred for 10 minutes to emulsify the target. Next, phenoxyethanol, methylparaben, and disodium ethylenediaminetetraacetate dihydrate were added and mixed to obtain a fragrance three-phase emulsion composition with the composition shown in Table 4.

[0080] (Example 2-13) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion containing a plurality of three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, the target substance, AFTERNOON JASMINE AD85639, was added and stirred for 10 minutes to emulsify the target substance. Next, phenoxyethanol, disodium ethylenediaminetetraacetate dihydrate, citric acid, and sodium citrate were added and mixed to obtain a fragrance three-phase emulsion composition with the composition shown in Table 4.

[0081] (Example 2-14) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition and mixing of water to obtain an emulsifier dispersion in which multiple three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol were dispersed. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, the emulsification target, MORNING CITRUS AD85640, was added and stirred for 10 minutes to emulsify the emulsification target. Next, phenoxyethanol, disodium ethylenediaminetetraacetate dihydrate, citric acid, and sodium citrate were added and mixed to obtain a fragrance three-phase emulsion composition with the composition shown in Table 4.

[0082] (Example 2-15) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, followed by the addition of water and mixing to obtain an emulsifier dispersion containing a plurality of three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, the emulsification target, ISLAND FOREST AD26589, was added and stirred for 10 minutes to emulsify the target. Next, phenoxyethanol, disodium ethylenediaminetetraacetate dihydrate, citric acid, and sodium citrate were added and mixed to obtain a fragrance three-phase emulsion composition with the composition shown in Table 4.

[0083] (Example 2-16) First, sodium dilauroyl glutamate lysine solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion in which multiple three-phase emulsifiers containing sodium dilauroyl glutamate lysine and phytantriol were dispersed. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, the target watery shampoo BR21010 was added and stirred for 10 minutes to emulsify the target. Next, phenoxyethanol, methylparaben, and disodium ethylenediaminetetraacetate dihydrate were added and mixed to obtain a fragrant three-phase emulsion composition with the composition shown in Table 4.

[0084] In Examples 2-1 to 2-16, the dispersion obtained by dispersing 1% by mass of the emulsifier for three-phase emulsification in the oily substance constituting the oil phase had a light scattering intensity of 950 or more at 25°C, and the average particle size of the emulsifier for three-phase emulsification (hydrophilic nanoparticles) in water was 8.0 nm or more and 400.0 nm or less. On the other hand, in Comparative Examples 2-1 to 2-3, at least one of the light scattering intensity of 950 or more and the average particle size of the emulsifier for three-phase emulsification in water of 8.0 nm or more and 400.0 nm or less was not satisfied.

[0085] Next, the following measurements and evaluations were carried out.

[0086] The fragrance three-phase emulsion compositions were visually observed to determine emulsion stability after 2 weeks or 2 months at room temperature from production, and after 2 weeks or 2 months at 40°C from production. Emulsion stability was ranked as excellent (◎) when no separation of the oil and water phases was observed, good (○) when only slight separation of oil was observed on the liquid surface, and poor (×) when separation of the oil and water phases was observed. The results are shown in Tables 3 and 4.

[0087] The aromatic three-phase emulsion composition was measured by dynamic light scattering using a particle size distribution analyzer FPAR (manufactured by Otsuka Electronics Co., Ltd.), and the average particle size of the emulsion particles dispersed in the aromatic three-phase emulsion composition was determined by Contin analysis. The results are shown in Tables 3 and 4.

[0088] [Table 3]

[0089] [Table 4]

[0090] As shown in Tables 1 to 4, the fragrance three-phase emulsion compositions in the above Examples had good emulsion stability. Regarding the relationship between the oily substance and the three-phase emulsifier constituting the fragrance three-phase emulsion compositions in the above Examples, the light scattering intensity of the dispersion obtained by dispersing the three-phase emulsifier in the oily substance was 950 or higher, and the average particle size of the three-phase emulsifier (hydrophilic nanoparticles) in water was 8.0 nm or more and 400.0 nm or less. Therefore, the emulsion stability results were similar to the predicted emulsion stability of the fragrance three-phase emulsion compositions determined before producing the fragrance three-phase emulsion compositions. On the other hand, the above Comparative Examples did not satisfy at least one of the requirements of the light scattering intensity of the dispersion being 950 or higher and the average particle size of the three-phase emulsifier being 8.0 nm or more and 400.0 nm or less, and therefore the emulsion stability of the oil phase and aqueous phase containing the fragrance components was poor.

[0091] Next, a sensory evaluation of the fragrance characteristics was performed on the fragrant three-phase emulsion composition obtained in Example 2-1 and a comparative sample composed of lavender oil and ethanol, with the lavender oil content being the same as in Example 2-1. In the sensory evaluation, four people applied one pump of each of the fragrant three-phase emulsion composition and the comparative sample to their wrists, and then rubbed them into their wrists.

[0092] As a result, the fragrant three-phase emulsion composition of Example 2-1 had a better fragrance (3 out of 4 people), while there was no difference in fragrance between the fragrant three-phase emulsion composition of Example 2-1 and the comparative sample (the remaining 1 person). Furthermore, the fragrant three-phase emulsion composition of Example 2-1 was perceived as having a longer-lasting fragrance (4 people). Furthermore, the fragrant three-phase emulsion composition of Example 2-1 was perceived as non-irritating to the skin (4 people), while the comparative sample was perceived as non-irritating to the skin (1 person). Furthermore, the fragrant three-phase emulsion composition of Example 2-1 was perceived as having better moisturizing properties (4 people). Thus, the fragrant three-phase emulsion composition of Example 2-1 had superior fragrance characteristics compared to the comparative sample. Furthermore, the fragrant three-phase emulsion compositions obtained in other Examples also had the same composition as the fragrant three-phase emulsion composition of Example 2-1, suggesting that they also had excellent fragrance characteristics similar to the fragrant three-phase emulsion composition of Example 2-1.

Claims

1. an oil phase containing a fragrance component; An aqueous phase; an emulsifier for three-phase emulsification, which has a light scattering intensity (DLS) of 950 or more at 25°C when dispersed in 1% by mass of an oily substance constituting the oil phase, and which has an average particle size of 8.0 nm or more and 400.0 nm or less when dispersed in water; A fragrant three-phase emulsion composition comprising:

2. The fragrant three-phase emulsion composition according to claim 1 , wherein the fragrant three-phase emulsion composition is an O / W type emulsion.

3. The fragrant three-phase emulsion composition according to claim 1 , wherein the emulsifier for three-phase emulsion is present at the interface between the oil phase and the aqueous phase.

4. The fragrant three-phase emulsion composition according to claim 1, wherein the emulsifier for the three-phase emulsion comprises sodium dilauroyl glutamate lysine and phytantriol.

5. The fragrant three-phase emulsion composition according to claim 1 , wherein the emulsifier for three-phase emulsification comprises an unsaturated fatty acid, a basic amino acid, and at least one of a ceramide and a sterol.

6. The fragrant three-phase emulsion composition according to claim 5 , wherein the unsaturated fatty acid is a monounsaturated fatty acid or a polyunsaturated fatty acid.

7. The aromatic three-phase emulsion composition according to claim 5, wherein the basic amino acid is at least one of lysine and L-arginine.

8. 6. The fragrant three-phase emulsion composition according to claim 5, wherein the ceramide is at least one selected from the group consisting of human ceramides, plant ceramides, and pseudo-ceramides.

9. The fragrant three-phase emulsion composition according to claim 5 , wherein the sterol is at least one of cholesterol and phytosterol.

10. 2. The fragrant three-phase emulsion composition according to claim 1, wherein the emulsifier for three-phase emulsification comprises sodium dilauroyl glutamate lysine and cholesterol.

11. The fragrant three-phase emulsion composition according to any one of claims 1 to 10, which is for use in cosmetics.

12. The fragrant three-phase emulsion composition according to any one of claims 1 to 10, which is for use in fragrances.

Images