Aromatic three-phase emulsion composition

Abstract

This invention provides an aromatic three-phase emulsion composition that has good emulsion stability and superior aroma characteristics compared to conventional compositions, using a three-phase emulsion emulsifier that has stable emulsifying ability for the oil type to be emulsified. [Solution] The aromatic three-phase emulsified composition comprises an oil phase containing an aromatic component, an aqueous phase, and a three-phase emulsifier whose dispersion obtained by dispersing 1% by mass in the oily substance constituting the oil phase has a light scattering intensity of 950 or more at 25°C, and whose average particle size when dispersed in water is 8.0 nm or more and 400.0 nm or less.

Description

Technical Field

[0001] The present invention relates to an aromatic three-phase emulsion composition.

Background Art

[0002] Conventionally, fragrance components have been used in various fields.

[0003] For example, Patent Document 1 describes an emulsified flavor preparation that is easy to add to foods and retains its fragrance even when the food is heated. This emulsified flavor preparation contains an oil and an emulsifier, and has an oil phase portion that is liquid at room temperature, and an aqueous phase portion that is dispersed in a particulate form in the oil phase portion and contains water, an inorganic salt, ethanol, and a fragrance component. It is a W / O type emulsified flavor preparation in which the average particle diameter of the aqueous phase portion is 10 μm or less in terms of the mode diameter.

[0004] By the way, as an emulsification method different from that of Patent Document 1, there is a three-phase emulsification method in which an emulsifier for three-phase emulsification is attached to the surface of the inner phase by van der Waals force for emulsification. As an emulsification technique using the three-phase emulsification method, for example, Patent Document 2 describes a water-in-oil (W / O) emulsion containing an inverse vesicle formed by sucrose fatty acid ester as an emulsifier, and the emulsion contains a nonionic surfactant other than sucrose fatty acid ester. In Patent Document 2, in the evaluation of the emulsification stability of the water-in-oil (W / O) emulsion obtained by the three-phase emulsification method, the emulsification state of the emulsion after standing for a predetermined time is visually observed.

[0005] However, not limited to the technology disclosed in Patent Document 2, emulsification stability must be confirmed solely after the preparation of the three-phase emulsion composition. Generally, emulsifiers used in three-phase emulsions are assumed to be hydrophilic nanoparticles that are insoluble in both water and oil. However, depending on the type of oil, even if the emulsion appears stable at the beginning of emulsification, some oils have the property of dissolving these hydrophilic nanoparticles over time. If the hydrophilic nanoparticles that should have been present at the oil-water interface dissolve, the emulsion state will naturally become unstable, and consequently, the emulsion state itself cannot be maintained.

[0006] In particular, when the oil to be emulsified is a mixture of components such as fragrances, its components and detailed composition are not clearly indicated, making it difficult to determine whether the emulsifier will dissolve in the oil. Furthermore, some fragrance components are water-soluble, and these water-soluble components are extracted into the water, which can cause changes in the composition of the oily components during emulsification. In light of these circumstances, the present invention proposes, using indicators, the physical properties that an emulsifier to be used with a particular type of oil should possess in order to maintain stable emulsification before performing three-phase emulsification. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2021-132595 [Patent Document 2] Japanese Patent Publication No. 2012-16668 [Overview of the project] [Problems that the invention aims to solve]

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

[0009] [1] A fragrance three-phase emulsifying composition comprising an oil phase containing fragrance components, an aqueous phase, and a three-phase emulsifying emulsifier whose dispersion obtained by dispersing 1% by mass in an oily substance constituting the oil phase has a light scattering intensity (DLS) of 950 or more at 25°C, and whose average particle size when dispersed in water is 8.0 nm or more and 400.0 nm or less. [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 three-phase emulsifier is an aromatic three-phase emulsifier according to [1] or [2] above, which is present at the interface between the oil phase and the aqueous phase. [4] The three-phase emulsifier is an aromatic three-phase emulsifier according to any one of [1] to [3] above, comprising dilauroyl glutamate lysine sodium and phytantriol. [5] The three-phase emulsifier is an aromatic three-phase emulsifying composition according to any one of [1] to [3] above, comprising an unsaturated fatty acid, a basic amino acid, and at least one of ceramide and sterol. [6] The aromatic three-phase emulsified 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 emulsified composition according to [5] or [6] above, wherein the basic amino acid is at least one of lysine and L-arginine. [8] The aromatic 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-type ceramides, plant-derived ceramides and pseudo-ceramides. [9] The aromatic three-phase emulsified composition according to any one of [5] to [8] above, wherein the sterol is at least one of cholesterol and phytosterol.

[10] The three-phase emulsifier is an aromatic three-phase emulsifier according to any one of [1] to [3] above, comprising dilauroyl glutamate lysine Na and cholesterol.

[11] The fragrant three-phase emulsion composition is for cosmetic use, as described in any one of [1] to

[10] above.

[12] The fragrant three-phase emulsion composition is for use in fragrances, as described in any one of [1] to

[10] above. [Effects of the Invention]

[0010] According to the present invention, by using a three-phase emulsifier that has stable emulsifying ability for the oil type to be emulsified, it is possible to provide an aromatic three-phase emulsified composition that has good emulsifying stability and superior aroma characteristics compared to conventional compositions. [Modes for carrying out the invention]

[0011] The following will provide a detailed explanation based on the embodiments.

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

[0013] The fragrant three-phase emulsified composition of the embodiment comprises an oil phase containing a fragrance component, an aqueous phase, and a three-phase emulsifier whose dispersion obtained by dispersing 1% by mass of the fragrance component in the oily substance constituting the oil phase has a light scattering intensity of 950 or more at 25°C, and whose average particle size when dispersed in water is 8.0 nm or more and 400.0 nm or less.

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

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

[0016] In the fragrant three-phase emulsion composition, a large number of emulsion particles in which oil droplets constituting the oil phase are 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, also simply referred to as closed vesicles) formed by an amphiphilic substance that spontaneously forms closed vesicles and particles of a polycondensed polymer having a hydroxyl group (hereinafter, also simply referred to as particles of a polycondensed polymer). The closed vesicles have the property of spontaneously forming closed vesicles in an aqueous component. Further, the particles of the polycondensed polymer include single particles of the polycondensed polymer and those in which single particles of the polycondensed polymer are connected to each other, but do not include aggregates of the polycondensed polymer (having a network structure) before being made into single particles.

[0018] The emulsifier for three-phase emulsification (closed vesicles and particles of a polycondensed polymer), which are hydrophilic nanoparticles, are known as particles having so-called three-phase emulsifying ability. Since the surfaces of the hydrophilic nanoparticles are hydrophilic, repulsive forces are generated between the hydrophilic nanoparticles. The method for preparing the hydrophilic nanoparticles (closed vesicles and particles of a polycondensed polymer) is the same as the method for preparing particles having three-phase emulsifying ability, such as Patent No. 3855203.

[0019] A large number of hydrophilic nanoparticles exist on the surface of the particulate oil phase, that is, the surface of the oil phase is covered with a large number of hydrophilic nanoparticles, so that repulsive forces are generated between the emulsion particles. The repulsive force generated between the emulsion particles is greater than the attractive force generated between the emulsion particles. Therefore, the aggregation between the emulsion particles in the aqueous phase is suppressed, and the dispersibility of the emulsion particles is maintained and improved.

[0020] The three-phase emulsification method enables the emulsification of an oil phase (inner phase) and an aqueous phase (outer phase) by having a plurality of hydrophilic nanoparticles adhere to the oil phase, which is the inner phase, due to van der Waals forces, and intervening at the interface between the oil phase and the aqueous phase. The emulsification mechanism by a surfactant that maintains the emulsified state by lowering the oil-water interfacial tension by orienting the hydrophilic group and the hydrophobic group toward the aqueous phase and the oil phase, respectively, is completely different from the three-phase emulsification mechanism (see, for example, Japanese Patent Publication No. 3855203).

[0021] As described above, the fragrant three-phase emulsified composition applies a three-phase emulsification technique that is completely different from the emulsification mechanism by a surfactant. Therefore, the fragrant three-phase emulsified composition can maintain a stable emulsified state even without containing a surfactant. Thus, in the fragrant three-phase emulsified composition, the amount of the surfactant can be significantly reduced compared to an emulsion using a surfactant, and in some cases, it does not contain a surfactant.

[0022] Regarding the emulsion particles contained in the fragrant three-phase emulsified composition, it can be confirmed by performing atomic force microscopy (AFM) observation and confirming that the hydrophilic nanoparticles adhere to the surface of the oil phase, which is the inner phase.

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

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

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

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

[0027] Furthermore, the oil phase may also contain oily components other than the aroma components. The oily components other than the aroma components may be liquid oil, solid oil, or a mixture of solid oil and liquid oil, but liquid oil is preferred. Liquid oil is oil that is liquid at room temperature (25°C), and solid oil is 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, peach kernel oil, sasanqua oil, linseed oil, hen oil, kaya oil, etc.), medium-chain triglycerides, hydrocarbon oils (squalene, squalane, liquid paraffin, etc.), ester oils (ethylhexyl methoxycinnamate, cetyl ethylhexanoate, diisostearyl malate, isopropyl myristate, ethylhexyl palmitate, octyl palmitate, octyl isopalmitate, isononyl isononanoate, isopropyl isononanoate) Examples include decyl, methylheptyl laurate, hexyl laurate, caprylic / capric triglyceride, triethylhexanoin, neopentyl lycophosphate, cetyl octanoate, isocetyl stearate, isopropyl isostearate, isodecyl oleate, glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, 2-ethylhexyl succinate, diethyl sebacate, etc., and silicone oils (cyclopentasiloxane, decamethylcyclopentasiloxane, methylpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, dodecamethylcyclohexasiloxane, etc.).

[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 proportion of the oil phase 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, if the proportion of aroma components to the total mass of the aromatic three-phase emulsion composition is 5.0% by mass or more, the aroma release and aroma persistence are sufficient. The upper limit of the above-mentioned proportion of aroma components is appropriately selected depending on the intended use of the aromatic three-phase emulsion composition, for example, 10.0% by mass or less.

[0031] The average particle size of emulsion particles in an aromatic three-phase emulsion composition is appropriately selected depending on the application of the aromatic three-phase emulsion composition. Because aromatic three-phase emulsion compositions are based on three-phase emulsification, the average particle size of emulsion particles can be controlled over a wider range compared to emulsion compositions using surfactants. For example, the average particle size of emulsion particles in an aromatic three-phase emulsion composition may be 0.10 μm or more, and may also be 100 μm or more. Alternatively, 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 of the aromatic three-phase emulsion composition is an aqueous substance, does not mix with the oil phase, is a continuous phase, and disperses multiple emulsion particles. The aqueous phase is, for example, water.

[0033] The proportion of the aqueous phase 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.

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

[0035] In terms of light scattering intensity of the dispersion, a dispersion is obtained by adding 1% by mass of a three-phase emulsifier to the oily substance constituting the oil phase of an aromatic three-phase emulsified composition and stirring for 24 hours. The light scattering intensity (DLS) of the dispersion thus obtained at 25°C is 950 or higher.

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

[0037] Furthermore, the average particle size of hydrophilic nanoparticles when a three-phase emulsifier 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 above-mentioned light scattering intensity is 950 or higher, it becomes possible to stably maintain the three-phase emulsion state when the oily substance is emulsified in three phases using a three-phase emulsifying emulsifier. In other words, by using the light scattering intensity of the dispersion as an indicator, it is possible to determine whether or not a stable aromatic three-phase emulsion composition can be obtained, thus avoiding situations that lead to the destabilization of conventional three-phase emulsion compositions over time. Furthermore, when the above-mentioned light scattering intensity is 950 or higher, and the average particle size of the hydrophilic nanoparticles is between 8.0 nm and 400.0 nm, the aromatic three-phase emulsion composition can have good emulsification stability and superior aroma characteristics compared to conventional aromatic emulsion compositions.

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

[0040] Furthermore, from the viewpoint of further improving the above effects, it is preferable that the three-phase emulsifier contains dilauroyl glutamate lysine sodium and phytantriol. Such a three-phase emulsifier may consist only of dilauroyl glutamate lysine sodium and phytantriol.

[0041] Furthermore, from the viewpoint of further improving the above effects, it is preferable that the emulsifier for three-phase emulsification other than those mentioned above includes an unsaturated fatty acid, a basic amino acid, and at least one of ceramide and sterol. Such an emulsifier for three-phase emulsification may contain only ceramide, only sterol, or both ceramide and sterol, which are amphiphilic oils. Alternatively, such an emulsifier for three-phase emulsification may consist only of an unsaturated fatty acid, a basic amino acid, and at least one of ceramide and sterol.

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

[0043] The basic amino acid is preferably at least one of lysine and L-arginine. The basic amino acid 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-type ceramides, plant-derived ceramides, and pseudo-ceramides. In particular, ceramide 2, ceramide 3, ceramide 5, glycoceramide, and pseudo-ceramide are more preferred. For example, the ceramide may be human-type ceramide only, or it may be both plant-derived ceramide and pseudo-ceramide.

[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] Furthermore, from the viewpoint of further improving the above effects, it is preferable that the emulsifier for three-phase emulsification, other than those mentioned above, contains dilauroyl glutamate lysine sodium and cholesterol. Such a three-phase emulsifier may consist only of dilauroyl glutamate lysine sodium and cholesterol.

[0047] Furthermore, the aromatic three-phase emulsified composition may contain various other components in addition to the above components, as long as they do not reduce the above-mentioned effects of this embodiment.

[0048] Such aromatic three-phase emulsion compositions are suitable for cosmetics and fragrances because they have excellent fragrance properties, including fragrance release, fragrance persistence, skin irritation, and moisturizing properties.

[0049] Next, a method for producing the above-mentioned aromatic 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 method, an emulsifier dispersion in which multiple particulate three-phase emulsifiers (hydrophilic nanoparticles) are dispersed in an aqueous substance is stirred with a stirrer or the like, and an oily substance is added to the emulsifier dispersion, thereby forming multiple emulsion particles, and an aromatic three-phase emulsion composition containing multiple emulsion particles dispersed in the aqueous phase is obtained.

[0051] As for the method of preparing the emulsifier dispersion, one may obtain the emulsifier dispersion by adding a three-phase emulsifier (before it becomes particulate) to an aqueous substance while stirring it with a stirrer, thereby forming particulate three-phase emulsifier (hydrophilic nanoparticles); or by adding a particulate three-phase emulsifier (hydrophilic nanoparticles) to an aqueous substance while stirring it with a stirrer, or by the method described in Japanese Patent No. 3855203. In addition, the following are other examples of methods for preparing the emulsifier dispersion.

[0052] A dispersion of a three-phase emulsifier containing dilauroyl glutamate lysine sodium and phytantriol can be obtained as follows. Specifically, by dissolving dilauroyl glutamate lysine sodium solution, phytantriol, and pentylene glycol, and then adding and mixing water, an emulsifier dispersion containing multiple particulate three-phase emulsifiers (hydrophilic nanoparticles) is obtained.

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

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

[0055] Alternatively, in the heating and dissolution step, a mixture may be obtained by heating and dissolving the unsaturated fatty acid, at least one of ceramide and sterol, and a cosolvent. Using a cosolvent when heating and dissolving the unsaturated fatty acid and at least one of ceramide and sterol makes it easier to obtain a mixture. The cosolvent is preferably butylene glycol, dipropylene glycol, or pentanediol.

[0056] In the stirring step, which follows the heating and dissolution step, the mixture obtained in the heating and dissolution step is stirred with an aqueous solution of basic amino acids to obtain an emulsifier dispersion in which multiple particulate three-phase emulsifiers (hydrophilic nanoparticles) are dispersed. Alternatively, in the stirring step, the heated aqueous solution of basic amino acids 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 and the aqueous solution of basic amino acids.

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

[0058] According to the embodiments described above, by using the light scattering intensity of a dispersion obtained by dispersing a three-phase emulsifying emulsifier in an oily substance containing the aroma components to be emulsified in three phases as an indicator, it is possible to determine whether or not a stable aroma three-phase emulsified composition can be obtained. This makes it possible to avoid situations that lead to the instability of conventional three-phase emulsified compositions over time. Furthermore, if the light scattering intensity of the dispersion is within a predetermined range, and the average particle size of the three-phase emulsifying emulsifier when dispersed in water is within a predetermined range, the aroma three-phase emulsified composition can have good emulsification stability and superior aroma characteristics compared to conventional aroma emulsified compositions.

[0059] Although embodiments have been described above, the present invention is not limited to the embodiments described above, and includes all aspects included in the concepts and claims of this disclosure, and can be modified in various ways within the scope of this disclosure. [Examples]

[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) Using a stirrer, the substances shown in Tables 1 and 2 were stirred at a stirring speed of 700 rpm for 24 hours to prepare dispersions. Subsequently, using a particle size / molecular weight measurement system (ELS-Z, manufactured by Otsuka Electronics Co., Ltd.), the obtained dispersion was filled into a rectangular glass cell (optical path length 10 mm, optical path width 10 mm). The glass cell was then set in the ELS-Z sample holder, and the light scattering intensity was measured 50 times under conditions of a dispersion temperature of 25°C and a fully open slit width (100%). The average value obtained by averaging the multiple measurements was calculated as the light scattering intensity (light quantity) of the dispersion. The results are shown in Tables 1 and 2.

[0062] Furthermore, the three-phase emulsifier was dispersed in water, and its particle size distribution was measured using a FPAR (Fiber Parametric Analysis System) (manufactured by Otsuka Electronics Co., Ltd.) by dynamic light scattering. The average particle size of the three-phase emulsifier (hydrophilic nanoparticles) in the 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, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing dilauroyl glutamate lysine Na and phytantriol, which are multiple three-phase emulsifiers. Next, the emulsifier dispersion was stirred in a homomixer at 8000 rpm and 25°C, and lavender oil, which was to be emulsified, was added and stirred for 10 minutes to emulsify the lavender oil. Subsequently, phenoxyethanol, methylparaben, and ethylenediaminetetraacetate disodium dihydrate (EDTA2-Na) were added and mixed to obtain an aromatic three-phase emulsified composition with the composition shown in Table 3.

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

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

[0068] (Examples 2-4) First, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing dilauroyl glutamate lysine sodium and phytantriol, which are multiple three-phase emulsifiers. Next, the emulsifier dispersion was stirred with a homomixer at 8000 rpm and 25°C, and orange oil, which was to be emulsified, was added and stirred for 10 minutes to emulsify the orange oil. Subsequently, phenoxyethanol was added and mixed to obtain an aromatic three-phase emulsified composition with the composition shown in Table 3.

[0069] (Examples 2-5) First, citric acid was dissolved in water and heated to 80°C to obtain an aqueous solution. Dilauroyl glutamate lysine sodium solution (30% aqueous solution) was added and mixed, followed by the addition of a mixture of dipropylene glycol and cholesterol (heated to 80°C) and mixing. Then, an aqueous substance consisting of arginine and water was added and mixed. After cooling the mixture, an emulsifier dispersion was obtained in which multiple three-phase emulsifiers containing dilauroyl glutamate lysine sodium and cholesterol were dispersed. Subsequently, the emulsifier dispersion was stirred in a homomixer at 8000 rpm and 25°C, and orange oil was added and stirred for 10 minutes to obtain an aromatic three-phase emulsified composition with the composition shown in Table 3.

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

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

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

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

[0074] (Examples 2-10) First, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing dilauroyl glutamate lysine sodium and phytantriol, which are multiple three-phase emulsifiers. Next, the emulsifier dispersion was stirred with a homomixer at 8000 rpm and 25°C, and eucalyptus citriodora, the target of emulsification, was added and stirred for 10 minutes to emulsify the eucalyptus citriodora. Subsequently, phenoxyethanol was added and mixed to obtain an aromatic three-phase emulsified 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 with a homomixer at 8000 rpm and 25°C, and (R)-(+)-limonene was added and stirred for 10 minutes to obtain an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0076] (Comparative Example 2-2) An emulsifier dispersion containing multiple closed vesicles formed by a derivative of polyoxyethylene hydrogenated castor oil, an amphiphilic substance that spontaneously forms closed vesicles, was stirred in water using a homomixer at 8000 rpm and 25°C. Lavender oil was added and stirred for 10 minutes to obtain an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0077] (Comparative Example 2-3) An emulsifier dispersion containing multiple closed vesicles formed by decaglyceryl distearate (2S10G), an amphiphilic substance that spontaneously forms closed vesicles, was stirred in water using a homomixer at 8000 rpm and 25°C. Citronella was added and the mixture was stirred for 10 minutes to obtain an aromatic three-phase emulsion composition with the composition shown in Table 3.

[0078] (Examples 2-11) First, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing multiple three-phase emulsifiers having dilauroyl glutamate lysine Na and phytantriol. Next, the emulsifier dispersion was stirred with a homomixer at 8000 rpm and 25°C, and green osmanthus AB81646, the target of emulsification, was added and stirred for 10 minutes to emulsify the target. Subsequently, phenoxyethanol, methylparaben, and ethylenediaminetetraacetate disodium dihydrate were added and mixed to obtain an aromatic three-phase emulsified composition with the composition shown in Table 4.

[0079] (Examples 2-12) First, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing multiple three-phase emulsifiers having dilauroyl glutamate lysine sodium and phytantriol. Next, the emulsifier dispersion was stirred with a homomixer at 8000 rpm and 25°C, and ESTHE ROYER 57729, the target of emulsification, was added and stirred for 10 minutes to emulsify the target. Subsequently, phenoxyethanol, methylparaben, and ethylenediaminetetraacetate disodium dihydrate were added and mixed to obtain an aromatic three-phase emulsified composition with the composition shown in Table 4.

[0080] (Examples 2-13) First, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing dilauroyl glutamate lysine sodium and phytantriol, which are multiple three-phase emulsifiers. Next, the emulsifier dispersion was stirred in a homomixer at 8000 rpm and 25°C, and AFTERNOON JASMINE AD85639, the target of emulsification, was added and stirred for 10 minutes to emulsify the target. Subsequently, phenoxyethanol, ethylenediaminetetraacetate disodium dihydrate, citric acid, and sodium citrate were added and mixed to obtain an aromatic three-phase emulsified composition with the composition shown in Table 4.

[0081] (Examples 2-14) First, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing multiple three-phase emulsifiers having dilauroyl glutamate lysine Na and phytantriol. Next, while stirring the emulsifier dispersion with a homomixer at 8000 rpm and 25°C, MORNING CITRUS AD85640, the product to be emulsified, was added and stirred for 10 minutes to emulsify the product. Subsequently, phenoxyethanol, ethylenediaminetetraacetate disodium dihydrate, citric acid, and sodium citrate were added and mixed to obtain an aromatic three-phase emulsified composition with the composition shown in Table 4.

[0082] (Examples 2-15) First, dilauroyl glutamate lysine sodium solution (30% aqueous solution) and phytantriol were dissolved in pentylene glycol, and then water was added and mixed to obtain an emulsifier dispersion containing dilauroyl glutamate lysine Na and phytantriol, which are multiple three-phase emulsifiers. Next, the emulsifier dispersion was stirred with a homomixer at 8000 rpm and 25°C, and ISLAND FOREST AD26589, the product to be emulsified, was added and stirred for 10 minutes to emulsify the product. Subsequently, phenoxyethanol, ethylenediaminetetraacetate disodium dihydrate, citric acid, and sodium citrate were added and mixed to obtain an aromatic three-phase emulsified composition with the composition shown in Table 4.

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

[0084] In Examples 2-1 to 2-16, the light scattering intensity at 25°C of the dispersion obtained by dispersing 1% by mass of the three-phase emulsifier in the oily substance constituting the oil phase was 950 or higher, and the average particle size of the three-phase emulsifier (hydrophilic nanoparticles) in water was between 8.0 nm and 400.0 nm. On the other hand, Comparative Examples 2-1 to 2-3 did not satisfy at least one of the following conditions: a light scattering intensity of 950 or higher, and an average particle size of the three-phase emulsifier in water being between 8.0 nm and 400.0 nm.

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

[0086] The emulsion stability of aromatic three-phase emulsion compositions was assessed by visual observation two weeks or two months after production at room temperature, and two weeks or two months after production maintained at 40°C. Emulsification stability was ranked as follows: excellent (◎) if no separation of the oil and aqueous phases was observed, good (○) if a very slight separation of oil was observed at the liquid surface, and poor (×) if separation of the oil and aqueous phases was observed. The results are shown in Tables 3-4.

[0087] For the aromatic three-phase emulsion composition, the particle size distribution was measured using dynamic light scattering with an FPAR particle size distribution analyzer (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 1-4, the emulsification stability of the aromatic three-phase emulsion composition was good in the above examples. Regarding the relationship between the oily substance and the emulsifier for three-phase emulsification that constitute the aromatic three-phase emulsion composition in the above examples, the light scattering intensity of the dispersion obtained by dispersing the emulsifier for three-phase emulsification in the oily substance was 950 or higher, and the average particle size of the emulsifier for three-phase emulsification (hydrophilic nanoparticles) in water was 8.0 nm to 400.0 nm. Therefore, the emulsification stability results were similar to the prediction of the emulsification stability of the aromatic three-phase emulsion composition that was determined in advance before manufacturing the aromatic three-phase emulsion composition. On the other hand, in the above comparative example, at least one of the conditions that the light scattering intensity of the dispersion was 950 or higher and the average particle size of the emulsifier for three-phase emulsification was 8.0 nm to 400.0 nm was not met, so the emulsification stability of the oil phase and aqueous phase containing the aroma component was poor.

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

[0092] As a result, the aromatic three-phase emulsion composition of Example 2-1 had a better fragrance (3 out of 4 people), and there was no difference in fragrance between the aromatic three-phase emulsion composition of Example 2-1 and the comparative sample (the remaining 1 person). In addition, the aromatic three-phase emulsion composition of Example 2-1 was perceived to have better fragrance persistence (4 people). Furthermore, the aromatic three-phase emulsion composition of Example 2-1 was perceived as not causing skin irritation (4 people), while the comparative sample was perceived as not causing skin irritation (1 person). In addition, the aromatic three-phase emulsion composition of Example 2-1 was perceived as having better moisturizing properties (4 people). Thus, the aromatic three-phase emulsion composition of Example 2-1 had superior fragrance characteristics compared to the comparative sample. Furthermore, since the aromatic three-phase emulsion compositions obtained in the other examples have the same composition as the aromatic three-phase emulsion composition of Example 2-1, it is suggested that they also have excellent fragrance characteristics similar to the aromatic three-phase emulsion composition of Example 2-1.

Claims

1. The oil phase containing aromatic components, Water phase and A three-phase emulsifier is provided, wherein the dispersion obtained by dispersing 1% by mass in the oily substance constituting the oil phase has a light scattering intensity (DLS) of 950 or more at 25°C, and the average particle size when dispersed in water is 8.0 nm or more and 400.0 nm or less. A fragrance-containing three-phase emulsion composition.

2. The aromatic three-phase emulsion composition according to claim 1, wherein the aromatic 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 emulsification is present at the interface between the oil phase and the aqueous phase.

4. The three-phase emulsifier for three-phase emulsification is the aromatic three-phase emulsifier according to claim 1, comprising dilauroyl glutamate lysine sodium and phytantriol.

5. The aromatic three-phase emulsifying 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 ceramide and sterol.

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

8. The aromatic three-phase emulsion composition according to claim 5, wherein the ceramide is one or more selected from the group consisting of human-type ceramides, plant-derived ceramides, and pseudo-ceramides.

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

10. The three-phase emulsifier for three-phase emulsification comprises dilauroyl glutamate lysine sodium and cholesterol, as described in claim 1.

11. The fragrant three-phase emulsion composition according to any one of claims 1 to 10, wherein the fragrant three-phase emulsion composition is for cosmetic use.

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

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