JP7734501B2 - Cosmetic composition and method for producing the same - Google Patents

Description

The present invention relates to a cosmetic composition and a method for producing the same. Specifically, the present invention relates to a liquid cosmetic composition that has a transparent or translucent appearance despite containing a solid or paste-like oil as an active ingredient.

Oil-in-water emulsion cosmetics containing solid or pasty oils have been known for some time (Patent Document 1). Using a paste or solid oil, like the cosmetics described in Patent Document 1, can impart a firming (voluptuous) feel to the skin. However, in order to disperse such oils in cosmetics, it is generally necessary to add an ionic or nonionic surfactant to disperse the oil.

Transparent or translucent cosmetics containing phospholipids have also been proposed (Patent Document 2). Phospholipids are known as components of biological membranes, and this document highlights them as ingredients that have good affinity with the skin and provide noticeable effects. Furthermore, because phospholipids are components of biological membranes and also have dispersing properties, they are used as highly safe, naturally derived surfactants.

Japanese Patent Application Laid-Open No. 2018-016583 JP 2011-136934 A

Liquid cosmetics, such as lotions, require a low-viscosity liquid state because they are important for their excellent penetration, smooth texture without stickiness, and a sense of effectiveness, such as softening the skin after application. Furthermore, a transparent or translucent appearance can create a clean feeling as a cosmetic. While blending solid or paste-like oils into cosmetics is expected to impart a firming feeling to the skin, as described above, the presence of even small amounts of such oils makes it difficult to maintain high transparency while maintaining the cosmetic's liquid state. While adding ionic surfactants and/or nonionic surfactants other than phospholipids to stably disperse oils in cosmetics is also an option, there are concerns that surfactants may cause lipids on the skin surface to be washed away, disrupting the skin's surface barrier and allowing foreign substances to penetrate. Therefore, the inclusion of surfactants other than phospholipids in cosmetics may diminish the perceived effectiveness of solid or paste-like oils. Additionally, surfactants can irritate the skin and can be painful for some people, so incorporating a high amount of surfactants to disperse the dispersed material transparently is undesirable from a safety standpoint.

It is also possible to use phospholipids as an alternative to ionic or nonionic surfactants. However, the dispersing power of phospholipids is weak, and it is difficult to disperse solid or pasty oils contained in effective amounts by themselves to achieve a transparent dispersion. Furthermore, when phospholipids are incorporated into low-viscosity cosmetics such as lotions, there is a concern that the phospholipids themselves may precipitate, making it necessary to further add a nonionic surfactant or the like to improve their dispersibility. Furthermore, even if solid or pasty oils and phospholipids can be temporarily dispersed transparently in liquid cosmetics, depending on the environmental conditions, the oils or phospholipids may precipitate after long-term storage, potentially reducing the transparency of the cosmetics.

The primary objective of the present invention is to provide a transparent or translucent liquid cosmetic composition in which solid or paste-like oil-derived ingredients are stably dispersed without relying on surfactants other than phospholipids.

After extensive research into ways to solve the above-mentioned problems, the inventors of the present invention discovered that by using a phospholipid as the primary dispersant and incorporating a sterol as a dispersing aid, it is possible to disperse a solid or paste-like oil agent in a liquid to form a transparent or translucent dispersion, and to obtain a cosmetic composition that is stable over time. Based on this discovery, the inventors then realized that the problems of the prior art could be solved, and completed the present invention. The following describes in detail the configuration and steps of the present invention.

The first aspect of the present invention relates to a transparent or translucent liquid cosmetic composition. In this specification, "transparent" means a transmittance of 80% or more, and "semitransparent" means a transmittance of 50% or more but less than 80%. Furthermore, in this specification, "transmittance" refers to the light transmittance at a wavelength of 700 nm measured using a Biochrom spectrophotometer (GeneQuant 1300).

The cosmetic composition according to the present invention comprises the following components (A) to (E):
(A) Phospholipid as a primary dispersant (B) Sterol (C) Oil-derived component that is solid or pasty when undispersed at room temperature (D) Polyhydric alcohol (E) Water

Here, containing a phospholipid "as a primary dispersant" means that the cosmetic composition does not contain other components with dispersing properties (e.g., ionic surfactants and/or nonionic surfactants other than phospholipids) in an amount greater by mass than the phospholipid. In other words, the cosmetic composition of the present invention may contain surfactants other than phospholipids, but the content of such surfactants shall be less than the phospholipids in mass. Note that, in this specification, the term "dispersion" includes emulsification. Dispersion broadly encompasses not only the mixing of liquids and solids, but also the mixing of liquids with each other. Sterols are used as dispersing aids. Sterols are, for example, one or two components selected from cholesterol and phytosterols. A dispersing aid is a base that, when used together with a primary dispersant, improves dispersion stability. Component (C) is dispersed in the final cosmetic composition. However, component (C) is a solid or paste-like oil at room temperature (25°C) and in an undispersed state at the raw material stage before being mixed with other components. The polyhydric alcohol serves as a dispersion medium for components (A) to (C). The remainder of components (A) to (D) in the cosmetic composition is component (E), i.e., water. The cosmetic composition of the present invention may consist solely of components (A) to (E), but it is naturally possible to add other components separately, so long as the composition is a transparent or translucent liquid. Furthermore, after producing a transparent or translucent liquid cosmetic composition as an intermediate product according to the present invention, this intermediate product can be used as a material for opaque cosmetics, such as emulsions, creams, foundations, and packs, or for solid or paste-like cosmetics.

The cosmetic composition of the present invention preferably has a transmittance of 65% or more. A transmittance of 65% or more provides a sufficiently transparent appearance, allowing the cosmetic composition to convey a clean feeling to the user.

In this specification, "liquid" conforms to the definition of "liquid" (Article 69-2 of the Regulations Concerning the Control of Hazardous Materials). Specifically, "liquid" means that when an article is placed in a vertical test tube (a flat-bottomed cylindrical glass tube with an inner diameter of 30 mm and a height of 120 mm) to a height of 55 mm from the bottom of the test tube, and the test tube is then turned horizontal, it takes 90 seconds or less for the tip of the moving surface of the article to pass the point 85 mm from the bottom of the test tube. Products that meet this definition of liquid have a smooth texture, spread easily and refreshingly on the skin surface, and are less sticky and uneven in application.

In the cosmetic composition of the present invention, the phospholipid component (A) preferably has a phosphatidylcholine content of 60% by mass or more. By using such a phospholipid, it is possible to effectively disperse a solid or paste-like oil agent in a liquid.

Cholesterol may be used as the sterol in the cosmetic composition according to the present invention. In this case, the blending ratio (A/B) of phospholipid (A) to cholesterol (B) is preferably 2 to 5.5. By adjusting the blending ratio of component (A) to component (B) within the above range, it is possible to effectively disperse a solid or paste-like oil agent in the liquid.

In the cosmetic composition according to the present invention, phytosterol may be used as the sterol. In this case, the blending ratio (A/B) of phospholipid (A) to phytosterol (B) is preferably 4 to 9. By adjusting the blending ratio of component (A) to component (B) within the above range, a solid or paste-like oil can be effectively dispersed in the liquid. In particular, when phytosterol is used as the sterol, the blending ratio of the sterol can be reduced compared to when cholesterol is used.

A second aspect of the present invention relates to a method for producing a transparent or translucent liquid cosmetic composition. The production method of the present invention involves pre-dispersing an oil-based component and processing the resulting crude dispersion in a high-pressure emulsifier. It particularly includes a heating step in which the raw materials or the crude dispersion are heated during high-pressure processing, and a pressurizing step in which the heated raw materials or the crude dispersion are pressurized. This crude dispersion contains a phospholipid as a primary dispersant, a sterol, a solid or pasty oil, a polyhydric alcohol, and water. By performing a pressurizing step during or immediately after the heating step, a cosmetic composition in which the oil in the crude dispersion is dispersed can be efficiently produced. In particular, the crude dispersion is preferably heated to 50 to 100°C in the heating step. The sterol is preferably one or two selected from cholesterol and phytosterol.

According to the present invention, a transparent or translucent liquid cosmetic composition can be obtained in which solid or pasty oil-derived components are stably dispersed by using a phospholipid as the primary dispersant.

The following describes embodiments of the present invention. The present invention is not limited to the embodiments described below, and also includes appropriate modifications of the embodiments described below within the scope obvious to those skilled in the art.

In this specification, the numerical range "A to B" means "A or greater and B or less."

[1. Cosmetic composition]
The cosmetic composition according to the present invention is a transparent or translucent liquid and contains at least the following components (A) to (E):
(A) Phospholipid as a primary dispersant (B) Sterol (C) Oil-derived component that is solid or pasty at room temperature in an undispersed state (D) Polyhydric alcohol (E) Water The present invention may be a cosmetic composition consisting of components (A) to (E), but it is naturally possible to add other components separately as long as the skin benefits of the active ingredients are not lost and the cosmetic composition is a transparent or translucent liquid. Furthermore, the state of the composition may be any system in which the oil is uniformly dispersed by the phospholipid dispersant, such as an emulsion, liquid crystal, or vesicle, and transparency or translucency can be maintained. Each component is described below.

[Component (A): Phospholipid]
The phospholipid is used as the primary dispersant. That is, the cosmetic composition does not contain other components with dispersing properties in a mass ratio greater than or equal to the phospholipid. Examples of other components with dispersing properties include anionic, cationic, amphoteric, or nonionic surfactants. In the present invention, by using a phospholipid as the primary dispersant and a sterol as a dispersing aid, a solid or paste-like oil can be dispersed transparently or translucently in a liquid containing a polyhydric alcohol and water without relying on other surfactants.

Furthermore, phospholipids improve the storage stability of cosmetic compositions, reduce stickiness, and improve compatibility with the skin. Any phospholipid commonly used in the cosmetic field can be used without particular limitations. Phospholipids may be natural products extracted or purified from plants or animals, chemically synthesized products, or products that have been processed by hydrogenation or hydroxylation. Phospholipids are preferably lecithin extracted or purified from soybeans or egg yolks, and more preferably lecithin that has been subjected to hydrogenation or hydroxylation. Specifically, soybean lecithin, hydrogenated soybean lecithin, egg yolk lecithin, or hydrogenated egg yolk lecithin are preferably used as phospholipids.

Furthermore, the phospholipid preferably has a phosphatidylcholine content of 60% by mass or more, and particularly preferably 65% by mass or more, 70% by mass or more, or 80% by mass or more. The upper limit of the phosphatidylcholine content in the phospholipid is not particularly limited, but is preferably 99% by mass or less or 98% by mass or less. Phospholipid components other than phosphatidylcholine include phosphatidic acid, phosphatidylserine, phosphatidylethanolamine, phosphatidylinositol, and phosphatidylglycerol. The phosphatidylcholine content in the phospholipid can be analyzed using methods such as thin-layer chromatography (TLC), high-performance liquid chromatography (HPLC), and Iatroscan (Iatron). Specifically, an organic solvent containing the phospholipid is spotted on a TLC and developed with chloroform:methanol:acetic acid (65:25:10), sprayed with 50% by mass sulfuric acid/ethanol, heated, and then the phospholipid is analyzed using a densitometer.

The phospholipid content in the total cosmetic composition is preferably 0.1% by mass or more, more preferably 0.3% by mass or 0.5% by mass or more, and particularly preferably 0.6% by mass or more or 0.8% by mass or more, from the viewpoints of dispersing solid or pasty oils, improving storage stability, reducing stickiness, and improving compatibility with the skin. Furthermore, to further enhance the perceived effect, the phospholipid content can also be 1.0% by mass or more, 1.1% by mass or more, or 1.5% by mass or more. Note that if the phospholipid content is too high, the phospholipid itself may precipitate in the liquid, reducing transparency, and therefore the phospholipid content is preferably 2% by mass or less, 2.5% by mass or less, or 3% by mass or less.

[Component (B): Sterol]
Sterols (also known as steroid alcohols) are used as dispersing agents. Structurally, sterols are cyclic higher alcohols having a hydroxyl group at the 3-position of the A ring of the steroid nucleus. Examples of sterols are animal-derived cholesterol and plant-derived phytosterols. Cholesterol is a zoosterol that is widely distributed mainly in animal tissues in a free state or as a fatty acid ester. Phytosterols are a mixture of plant sterols obtained mainly from the unsaponifiable matter of vegetable oils and fats. Examples of plant sterols included in phytosterols include campesterol, β-sitosterol, brassicasterol, and stigmasterol. In the present invention, cholesterol and phytosterols may be used alone as sterols, or a mixture of these may be used. Furthermore, sterols that have been subjected to chemical treatments such as hydrogenation (e.g., cholestanol) are also included in the sterols of the present invention.

When cholesterol is used as the sterol, the content of cholesterol in the total composition of the cosmetic composition is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, 0.15% by mass or more, or 0.2% by mass or more, from the viewpoint of effectively functioning as a dispersing aid. However, the cholesterol content is less than the phospholipid content.

Furthermore, the blending ratio of phospholipid to cholesterol content is preferably within a range of 2.0 to 5.5 by mass, and this blending ratio may be 2.5 or more, 3.0 or more, 3.5 or more, 4.0 or more, or 5.0 or more. In this way, by adjusting the blending ratio of phospholipid to cholesterol within an appropriate range, the dispersion stability of the cosmetic composition is improved by the phospholipid as the primary dispersant and the cholesterol as the dispersion aid. In particular, even when the cosmetic composition is stored under high-temperature conditions (e.g., about 40°C) for a long period of time (e.g., about one month), it is possible to store the cosmetic composition in a transparent or translucent liquid state.

Furthermore, when phytosterols are used as the sterol, the content of phytosterols in the total composition of the cosmetic composition is preferably 0.01% by mass or more, more preferably 0.05% by mass or more, or even 0.1% by mass or more, from the viewpoint of effectively functioning as a dispersing aid. However, the content of phytosterols is less than the content of phospholipids.

Furthermore, the blending ratio of phospholipid to phytosterol content is preferably within a range of 4.0 to 9.0 by mass, and this blending ratio may be 4.0 or more, 6.0 or more, or 7 or more. In this way, by adjusting the blending ratio of phospholipid to phytosterol within an appropriate range, the dispersion stability of the cosmetic composition is improved by the phospholipid as the primary dispersant and the phytosterol as the dispersion aid. In particular, even when the cosmetic composition is stored under high-temperature conditions (e.g., about 40°C) for a long period of time (e.g., about one month), the cosmetic composition can be stored in a transparent or translucent liquid state.

[Component (C): Solid or Pasty Oil]
Solid or paste-like oils are primarily used as active ingredients to impart firmness (voluptuousness) to the skin. As raw materials, these oils are solid or paste-like at atmospheric pressure (1013.25 hPa), room temperature (25°C), and in an undispersed state. However, these oils become finely dispersed in the liquid when mixed with other ingredients during the manufacturing process of the cosmetic composition.

Any solid or paste-like oil agent commonly used in the field of cosmetics can be used without any particular limitation. Examples of solid or paste-like oil agents include hydrocarbons such as paraffin wax, microcrystalline wax, ceresin, ozokerite, petrolatum, polyethylene wax, and Fischer-Tropsch wax; waxes such as carnauba wax, beeswax, candelilla wax, rice bran wax, jojoba wax, Japan wax, jojoba butter, and lanolin; Ester oils such as di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate, di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate, dioctyldodecyl lauroyl glutamate, cholesteryl hydroxystearate, cholesteryl oleate, dipentaerythrityl hexa(hydroxystearate/hexastearic acid/hexarosinate), hydrogenated castor oil, hydrogenated palm oil, hydrogenated coconut oil, cetyl palmitate, glyceryl (behenate/eicosanedioate), tristearin, tribehenin, shea butter, phytosteryl/isostearyl/cetyl/stearyl/behenyl dimer dilinoleate, tri(caprylic/capric/myristic/stearic acid), hydrogenated castor oil stearate, hydrogenated castor oil isostearate, and hydrogenated castor oil monohydroxystearate; Ether oils such as batyl alcohol and chimyl alcohol; higher alcohols other than sterols such as stearyl alcohol and behenyl alcohol, etc.

As will be described in more detail below, in a preferred embodiment of the present invention, the coarse dispersion containing the above components (A) to (E) is pressurized immediately after heating or while being heated to promote the fine dispersion of component (C): oil. This oil preferably has a melting point that allows it to dissolve during the heating process. Specifically, the melting point of this oil is preferably 100°C or lower, and may be 90°C or lower, 80°C or lower, 70°C or lower, or 60°C or lower. The lower limit of the melting point of this oil is not particularly limited as long as it can maintain a solid or paste-like state at room temperature (25°C) under atmospheric pressure. For example, it is preferable to use an oil having a melting point of 30°C or higher, 32°C or higher, 35°C or higher, or 40°C or higher. Solid or paste-like oils may also be mixed with a polyhydric alcohol or liquid oil and melted at 100°C or lower.

The content of solid or paste-like oil-derived components in the total composition of the cosmetic composition is preferably 0.001% by mass or more, and particularly preferably 0.01% by mass or more, 0.02% by mass or more, 0.05% by mass or more, 0.08% by mass or more, or 0.1% by mass or more. By including 0.001% by mass or more, particularly 0.01% by mass or more, of these oil-derived components in the cosmetic composition, it is possible to impart a firming feeling to the skin. However, the content of these oil-derived components is preferably less than 1% by mass, and particularly preferably 0.9% by mass or less, 0.7% by mass or less, 0.5% by mass or less, 0.3% by mass or less, or 0.2% by mass or less. If this active ingredient is included in the composition at 1% by mass or more, the cosmetic composition will become cloudy, and the transparent or translucent cosmetic composition intended by the present invention will not be obtained. In the present invention, even if the content of solid or pasty oil as an active ingredient is low, it is possible to obtain a cosmetic that provides a sufficiently high level of perceived skin benefits by using phospholipids and sterols instead as dispersants or auxiliary agents, rather than relying on surfactants. In particular, because phospholipids and sterols also have skin benefits, combining them with the above-mentioned oils can improve the skin benefits of the cosmetic composition. For these reasons, the present invention prioritizes maintaining the transparency of the cosmetic and reduces the content of solid or pasty oil.

[Component (D): Polyhydric alcohol]
The polyhydric alcohol is used as a solvent for the above components (A) to (C). The polyhydric alcohol is preferably a water-soluble polyhydric alcohol. Examples of polyhydric alcohols include glycerin, diglycerin, polyglycerin-3, polyglycerin-10, 1,3-butylene glycol, propylene glycol, 3-methyl-1,3-butanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, trimethylolpropane, pentaerythritol, hexylene glycol, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, 1,2-decanediol, polypropylene glycol, sorbitol, maltitol, and trehalose. The polyhydric alcohols may be used alone or in combination of two or more.

The content of polyhydric alcohol in the total composition of the cosmetic composition is not particularly limited, but is preferably 1% by mass or more, and more preferably 2% by mass or more, 4% by mass or more, or 5% by mass or more. The upper limit of the polyhydric alcohol content is preferably 40% by mass or 30% by mass, and particularly preferably 20% by mass.

[Component (E): Water]
The balance of the cosmetic composition other than the components (A) to (D) may be water (purified water). The content of water in the cosmetic composition may be, for example, 30% by mass or more, or may be 50% by mass, 70% by mass or more, or 90% by mass or more.

[Optional ingredients]
The cosmetic composition according to the present invention may contain one or more optional aqueous or oily components commonly used in the field of cosmetics, to the extent that the cosmetic composition exhibits a transparent or translucent appearance and maintains its liquid state. Examples of optional components include moisturizers, surfactants, water-soluble polymers, liquid oils, oil-soluble gelling agents, clay minerals, resins, film-forming agents, UV absorbers, powders, pigments, dyes, coloring materials, preservatives, antibacterial agents, antioxidants, salts, pH adjusters, chelating agents, fragrances, refreshing agents, antiperspirants, anti-inflammatory agents, skin activators, skin-beautifying components, and various extracts.

In particular, a liquid oil (component (C-2)) may be added to the cosmetic composition to enhance the skin benefits of the solid or paste-like oil (component (C)) or to increase the transparency of the composition. The liquid oil used should be one that is liquid under atmospheric pressure and at room temperature (25°C).

Examples of liquid oils include ethyl oleate, ethyl linoleate, isopropyl myristate, isopropyl palmitate, isopropyl isostearate, cetyl 2-ethylhexanoate, isocetyl 2-ethylhexanoate, isostearyl 2-ethylhexanoate, 2-ethylhexyl palmitate, 2-hexyldecyl isostearate, isostearyl isostearate, trimethylolpropane triisostearate, octyldodecyl myristate, isostearyl myristate, isocetyl myristate, hexyl laurate, decyl oleate, octyl oleate These include ethyldodecyl, isostearyl pivalate, isopropyl isostearate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, octyldodecyl erucate, pentaerythrityl tetraethylhexanoate, trimethylolpropane triethylhexanoate, dioctyl succinate, propylene glycol dicaprylate, propylene glycol dicaprate, propylene glycol dinonanoate, propylene glycol di(capryl-caprate), and propylene glycol diisostearate.

Compared to liquid oils, solid or paste-like oils can impart a greater firmness to the skin. For this reason, it is preferable that the content of solid or paste-like oil is higher than that of liquid oils. If the total content of solid or paste-like oils and liquid oils is 1.0, the content of solid or paste-like oil relative to this total is preferably 0.5 or more, and particularly preferably 0.6 or more, 0.7 or more, or 0.8 or more. It is necessary to ensure that this blending ratio is at least 0.1 or 0.2 or more.

[Surfactant]
In a preferred embodiment of the present invention, the cosmetic composition may not contain any surfactants other than phospholipids. Furthermore, the cosmetic composition may contain surfactants other than phospholipids, but in that case, the content thereof is less than the content of phospholipids in terms of mass ratio. Surfactants include, for example, chemically synthesized surfactants containing petroleum-derived components. Examples of surfactants include anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants. The present invention can achieve a transparent or translucent liquid cosmetic composition without relying on these surfactants.

Examples of anionic surfactants include higher fatty acid soaps, alkyl ether phosphate esters, alkyl ether carboxylates, acylmethyl taurines, N-acyl-N-methyl-β-alanines, N-acylglycines, N-acylglutamates, polyoxyethylene alkyl carboxylates, alkylphenyl ether sulfonates, alkylsulfosuccinates and their salts, N-acylsarcosines and their salts, and polyoxyethylene coconut oil fatty acid monoethanolamide sulfates.

Examples of cationic surfactants include stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, distearyldimethylammonium chloride, lanolin fatty acid aminopropylethyldimethylammonium ethyl sulfate, stearic acid diethylaminoethylamide lactate, dilaurylamine hydrochloride, and oleylamine lactate.

Examples of amphoteric surfactants include coconut oil fatty acid amidopropyl dimethylaminoacetic acid betaine, lauryl dimethylaminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryl hydroxysulfobetaine, lauroyl amidoethyl hydroxyethyl carboxymethyl betaine, sodium hydroxypropyl phosphate, and sodium β-laurylaminopropionate.

Examples of nonionic surfactants include sorbitan fatty acid esters, glycerin fatty acid esters and their alkylene oxide adducts, polyoxyalkylene alkyl ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene alkylphenols, polyoxyethylene sorbit fatty acid esters, polyoxyethylene alkylphenyl formaldehyde condensates, polyoxyethylene sterol and its derivatives, polyoxyethylene cholesterol ether, polyoxyethylene cholestanol ether, polyoxyethylene phytosterol ether and polyoxyethylene phytostanol ether, polyoxyethylene lanolin and its derivatives, polyoxyethylene beeswax derivatives, sugar esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene castor oil.

[Physical properties of cosmetic composition (viscosity and transmittance)]
The cosmetic composition according to the present invention is liquid and has a low viscosity. The term "liquid" as used herein conforms to the definition of "liquid" (Article 69-2 of the Regulations Concerning the Control of Hazardous Materials). Specifically, "liquid" refers to the state in which, when an article is placed in a vertical test tube (a flat-bottomed cylindrical glass tube with an inner diameter of 30 mm and a height of 120 mm) to a height of 55 mm from the bottom of the test tube and the test tube is then horizontally rotated, the time it takes for the tip of the moving surface of the article to pass the point 85 mm from the bottom of the test tube is within 90 seconds. While the cosmetic composition may be liquid in nature, the viscosity of the cosmetic composition may be 1,000 mPa·S or less, preferably 800 or 600 mPa·S or less, more preferably 400 or 300 mPa·S or less, and particularly preferably 200 or 100 mPa·S or less. In the present specification, the term "viscosity" refers to a method for measuring viscosity, in which a measurement sample is filled into a glass bottle having a diameter of 40.5 mm and a height of 74 mm to a height of approximately 45 mm, the bottle is capped, and the bottle is left to stand overnight in a thermostatic chamber at 30°C. After that, the measurement value is read at a predetermined time point between 1 and 3 minutes using a TVB-10 viscometer (manufactured by Toki Sangyo Co., Ltd.) with the attached rotors No. 1 to No. 4 at 0.3 to 30 rpm, and the measured value is multiplied by the corresponding multiplier.

The cosmetic composition according to the present invention is translucent or transparent and has a high transmittance. The transmittance of the cosmetic composition may be 50% or more, preferably 65% or more or 70% or more, and particularly preferably 80% or more, 85% or more, or 90% or more. There is no particular upper limit to the transmittance, but it is generally 100% or less. The method for measuring transmittance is as described above.

[2. Method for producing cosmetic composition]
Next, a method for producing the cosmetic composition according to the present invention will be described. The method for producing the cosmetic composition mainly includes the following steps 1 to 4 in this order.
1: Rough dispersion process 2: Heating process 3: Pressurizing process 4: Cooling process

The coarse dispersion step involves pre-dispersing the aforementioned components (A) to (E) by adding optional components as needed to obtain a coarse dispersion. When mixing components (A) to (E) and optional components, each component may be stirred or heated.

The heating step is a step in which the coarse dispersion obtained in the coarse dispersion step is heated. In the heating step, the coarse dispersion is preferably heated to 50°C or higher. In particular, it is particularly preferable to heat the coarse dispersion to 60°C or higher, 70°C or higher, or 80°C or higher in the heating step. The upper limit of the temperature of the coarse dispersion to be heated in the heating step is 100°C, and may be 95°C. This improves the fluidity of the components in the coarse dispersion, making it easier to finely disperse the components in the subsequent pressurization step. In particular, in the present invention, a solid or paste-like oil agent with a high melting point is used as part of the raw materials. By heating such an oil agent to a temperature above its melting point in a step prior to the pressurization step, the oil agent can be effectively dispersed in the liquid in the pressurization step.

A general heating device can be used for the heating step. The heating device, for example, includes an oil bath (liquid tank) for storing silicone oil or the like, a heater for heating the silicone oil in the oil bath, and a conduit for circulating the crude dispersion within the oil bath. The heating device may also include a stirrer for stirring the silicone oil in the oil bath. This allows the crude dispersion to be heated continuously by passing it through the conduit. Alternatively, the crude dispersion passing through the conduit can be heated using a belt heater or by wrapping an electric heating wire around the conduit.

The pressurizing step is a step in which pressure is applied to the heated coarse dispersion immediately after the heating step, while maintaining the heated temperature. In the pressurizing step, a pressure of 30 MPa or more is preferably applied to the coarse dispersion. In particular, a pressure of 35 MPa or more, 50 MPa or more, or 70 MPa or more is preferably applied to the coarse dispersion in the pressurizing step. The pressure in the pressurizing step may also be 100 MPa or more, 120 MPa or more, or 150 MPa or more. There is no particular upper limit to the pressure in the pressurizing step, but the structural limit of a typical pressurizing device is approximately 500 MPa. By applying pressure in the pressurizing step to the coarse dispersion that has been heated to a predetermined temperature in the previous heating step, a solid or paste-like oil agent can be transparently dispersed in the liquid.

A general pressurizing device can be used in the pressurizing step. A pressurizing device is a device that pre-disperses the aqueous phase components and oil phase components, if necessary, using a homomixer or the like, and then obtains a composition containing finely dispersed particles by applying high shear force using, for example, a high-pressure homogenizer under high pressure.

The cooling process is a process for cooling the composition, which has been heated to a high temperature through the heating process and pressurizing process. The final cosmetic composition is obtained through this cooling process. In the cooling process, the composition can be cooled to room temperature (25°C), 15°C, 10°C, or lower using a known cooling device such as a heat exchanger. Alternatively, the composition can be allowed to cool naturally in the cooling process.

The cosmetic composition obtained by the above-mentioned manufacturing method is transparent or translucent, with a solid or paste-like oil dispersed in the liquid. The above-mentioned manufacturing method makes it possible to obtain a transparent or translucent liquid cosmetic composition with a stably dispersed oil, without using surfactants other than phospholipids.

[Study I. Study of the blending amounts and blending ratios of components (A) and (B)]
Examples 1 to 4 and Comparative Example 1 are lotions. In Examples 1 to 4, the following components (A) to (E) were blended in the amounts (% by mass) shown in Table 1. In Study I, in order to confirm the effectiveness of component (B): cholesterol in Examples 1 to 4, component (B) was not blended in Comparative Example 1. In Examples 1 to 4 and Comparative Example 1, a crude dispersion in which each component was mixed was heated to 70°C and then immediately pressurized at 70 MPa.

<Ingredients>
・Component (A): Hydrogenated lecithin ・Component (B): Cholesterol ・Component (C): Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate
Component (D): BG (1,3-butylene glycol)
Component (E): Water

<Evaluation>
In Study I, the stability of transparency over time and the skin effect (skin firmness) of Examples 1 to 4 and Comparative Example 1 were evaluated. The stability over time was evaluated for samples stored for three days at room temperature (RT, 25°C), 5°C, or 40°C, and for samples stored for one month at 5°C or 40°C. The transmittance of each sample was measured using the method described above. Assuming a lotion, a composition with a transmittance of 65% or more can be evaluated as having a sufficiently transparent appearance. Therefore, in each table, a transmittance of 65% or more but less than 80% is evaluated as "○", a transmittance of 80% or more but less than 100% is evaluated as "◎", and a transmittance of less than 65% is evaluated as "×" (unacceptable). Furthermore, for the evaluation of the skin effect (skin firmness), 20 monitors rated the perceived skin firmness effect on a scale of 1 to 5 (5 being the highest). In each table, an average value of 4.5 or more is marked with "◎", an average value of 4 or more but less than 4.5 is marked with "○", an average value of 3 or more but less than 4 is marked with "△", and an average value of less than 3 is marked with "×" (ineligible).

The results of Study I showed that Examples 1 to 4, which contain hydrogenated lecithin and cholesterol, have excellent stability over time, and no deterioration in transparency was observed even when stored for long periods of time in relatively harsh temperature environments. On the other hand, in Comparative Example 1, which does not contain cholesterol, the transmittance deteriorated to less than 65% when stored at 40°C for one month, confirming the possibility that the quality may be compromised during product distribution. Furthermore, since Examples 1 to 4 and Comparative Example 1 contain an effective amount of ingredient (C), they were adequately evaluated for their skin benefits.

[Study II. Study of the type and amount of component (C)]
Examples 5 to 15 are lotions. In Examples 5 to 15, as shown in Table 2, the same components (A), (B), (D), and (E) were used as in Examples 1 to 4 shown in Table 1. On the other hand, in Study II, in order to investigate the effective type and amount of component (C), the type and amount were adjusted as follows for Examples 5 to 15.

<Component (C)>
Example 5: di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate 0.001% by mass
Example 6: Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate 0.01% by mass
Example 7: Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate 0.1% by mass
Example 8: Cetyl palmitate 0.1% by mass
Example 9: Dioctyldodecyl lauroyl glutamate 0.1% by mass
Example 10: Cholesteryl hydroxystearate 0.1% by mass
Example 11: Paraffin 0.1% by mass
Example 12: Cholesteryl oleate 0.1% by mass
Example 13: Dipentaerythrityl hexa(hydroxystearate/stearic acid/rosin acid) 0.1% by mass
Example 14: Vaseline 0.1% by mass
Example 15: Di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate 0.1% by mass

<Evaluation>
The stability of transparency over time and skin effect (skin firmness) were evaluated for Examples 5 to 15. The evaluation methods were the same as those in Study I above.

Comparing Examples 5 to 7, Study II revealed that while a low content of solid or paste-like oil (C) impairs skin benefits, a high content reduces transparency. Therefore, component (C) has a trade-off between its effect on the transparency and skin benefits of the lotion, and it is necessary to adjust the content appropriately for each type. For example, in the case of di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate, a content of approximately 0.01% by weight is preferable to optimize the stability of the transparency of the lotion over time and its skin benefits. Furthermore, comparing Examples 5 to 15, it was found that there are no significant differences in transparency, stability over time, or skin benefits when using solid or paste-like oils of the type commonly used in cosmetics.

[Study III. Examination of the blending ratio of solid oil and liquid oil]
Examples 16 to 19 and Comparative Example 2 are lotions. In Examples 16 to 19, as shown in Table 3, the same components (A), (B), (C-1), (D), and (E) were used as in Examples 1 to 4 shown in Table 1. On the other hand, in Study III, the oil components in Examples 16 to 19 were divided into component (C-1): a solid or paste-like oil, and component (C-2): a liquid oil, and the blending ratios of each were examined. In Comparative Example 2, in order to confirm the effectiveness of component (C-1): a solid or paste-like oil, component (C-1) was not included, and only component (C-2): a liquid oil was used as the oil component. In both Examples 16 to 19 and Comparative Example 2, ethyl oleate was used as component (C-2).

<Evaluation>
The stability of transparency over time and skin effect (skin firmness) were evaluated for Examples 16 to 19 and Comparative Example 2. The evaluation methods were the same as those in Study I above.

Comparing Examples 16 to 19, the results of Study III revealed that increasing the amount of solid or paste-like oil component (C-1) in the total amount of solid or paste-like oil component (C-1) and liquid oil component (C-2) improved the skin benefits of the lotion but reduced transparency, while increasing the amount of (C-2) improved the transparency of the lotion but reduced the skin benefits. Therefore, by using both solid or paste-like and liquid oil components, it is possible to control the skin benefits and transparency of the lotion. In other words, if a lotion with improved skin benefits is preferred, simply increase the amount of solid or paste-like oil. Conversely, if a lotion with improved transparency is preferred, simply increase the amount of liquid oil. On the other hand, comparing Examples 16 to 19 with Comparative Example 2, it was found that using only a liquid oil resulted in inadequate transparency, stability over time, and skin benefits for the lotion. In other words, a solid or paste-like oil is essential to obtain a lotion with transparency, excellent stability over time, and excellent skin benefits.

[Study IV. Study of the amount and type of component (D)]
Examples 20 to 23 are lotions. In Examples 20 to 23, as shown in Table 4, the same components (A), (B), (C), and (E) were used as in Examples 1 to 4 shown in Table 1. On the other hand, in Study IV, in order to investigate the effective type and amount of component (D), the type and amount were adjusted as follows for Examples 20 to 23.

<Component (D)>
Example 20: BG (1,3-butylene glycol) 5% by mass
Example 21: BG (1,3-butylene glycol) 30% by mass
Example 22: DPG (dipropylene glycol) 5% by mass
Example 23: Glycerin 5% by mass

<Evaluation>
The stability of transparency over time and skin effect (skin firmness) were evaluated for Examples 20 to 23. The evaluation methods were the same as those in Study I above.

The results of Study IV showed that, as long as ingredient (D) is within the range normally used in cosmetics, adjusting the type and amount of ingredient (D) does not result in any significant differences in transparency, stability over time, or skin effects.

[Study V. Study of heating and high pressure conditions]
Examples 24 to 27 and Comparative Examples 3 to 4 were lotions. In Examples 24 to 27 and Comparative Examples 3 and 4, the same components (A) to (E) as in Examples 1 to 4 shown in Table 1 were used, as shown in Table 5. On the other hand, in Study V, in order to examine the effectiveness of the heating step in particular, the contents of each of the components (A) to (E) were all kept constant for Examples 24 to 27 and Comparative Examples 3 to 4, while the heating and pressurizing conditions of the crude dispersions were adjusted. That is, in Examples 24 to 27, the crude dispersions were heated to 50°C or 70°C and pressurized at 70 MPa, 35 MPa, or 150 MPa. On the other hand, in Comparative Examples 3 and 4, the pressurizing conditions were the same as in Examples 24 to 27, but the temperature of the crude dispersion was kept at room temperature (25°C), which was lower than in Examples 24 to 27.

<Evaluation>
The stability of transparency over time and skin effect (skin firmness) were evaluated for the above Examples 24 to 27 and Comparative Examples 3 and 4. The evaluation methods were the same as those in Study I above.

The results of Study V revealed that when a crude dispersion that was not sufficiently heated was pressurized, as in Comparative Examples 3 and 4, the oil component (C) did not disperse finely in the liquid, resulting in insufficient transparency of the lotion. In contrast, when the crude dispersion was heated to 50°C or higher before pressurization, as in Examples 24 to 27, the oil component was successfully dispersed in the liquid, even though the pressurization conditions were the same as in Comparative Examples 3 and 4, and a lotion with sufficiently high transparency was obtained. Thus, a significant difference in the transparency of the lotion was observed between the Examples in which the crude dispersion was heated immediately before pressurization and the Comparative Examples in which it was not heated. Furthermore, a comparison of Examples 24 to 27 revealed that, as long as the crude dispersion was heated above the melting point of the oil component (C), no significant difference was observed even if the mixture was heated to a higher temperature. On the other hand, with regard to the pressurization conditions, applying pressure of 100 MPa or higher (particularly 150 MPa), as in Example 27, enhanced the transparency of the cosmetic product.

[Study VI. Study of the blending amounts and blending ratios of component (A) and component (B)]
Examples 28 to 31 and Comparative Example 5 are lotions. In Study VI, component (B) in Study I was changed from cholesterol to phytosterol, and lotions were produced and evaluated under the same conditions as in Study I. In Examples 28 to 31 and Comparative Example 5, components (A) to (E) were blended in the amounts (% by mass) shown in Table 6. Note that in Study VI, di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate was used instead of di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate in Study I.

The results of Study VI showed that Examples 28 to 31, which contained phytosterol, had excellent stability over time, similar to the Example containing cholesterol (Study I), and no deterioration in transparency was observed even when stored for long periods of time under relatively harsh temperature conditions. On the other hand, in Comparative Example 5, which did not contain phytosterol, the transmittance deteriorated to less than 65% when stored at 40°C for one month, confirming the possibility of product quality being compromised during distribution. Furthermore, since Examples 28 to 31 and Comparative Example 5 contained an effective amount of ingredient (C), sufficient evaluation was obtained for their skin benefits.

[Study VII. Study of the type and amount of component (C)]
Examples 32 to 42 are lotions. In Study VII, component (B) in Study II was changed from cholesterol to phytosterol, and lotions were produced and evaluated under the same conditions as in Study II. In Examples 32 to 42, components (A) to (E) were blended in the amounts (% by mass) shown in Table 7.

The results of Study VII showed that, like the cholesterol-containing example (Study II), Examples 32-42, which contain phytosterol, showed that while a low content of solid or paste-like oil (component (C)) impairs skin benefits, a high content reduces transparency. Therefore, component (C) has a trade-off between its effect on the transparency and skin benefits of the lotion, and it is necessary to adjust the content appropriately for each type. For example, with regard to di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate, a content of approximately 0.01% by weight is preferable if stability of transparency over time is prioritized, while a content of approximately 0.1% by weight is preferable if skin benefits are prioritized. Furthermore, a comparison of Examples 32-42 revealed that there are no significant differences in transparency, stability over time, or skin benefits between solid or paste-like oils of the type commonly used in cosmetics.

[Study VIII. Study of the blending ratio of solid oil and liquid oil]
Examples 43 to 46 and Comparative Example 6 were lotions. In Study VIII, component (B) in Study III was changed from cholesterol to phytosterol, and lotions were produced and evaluated under the same conditions as in Study III. In Examples 43 to 46 and Comparative Example 6, components (A) to (E) were blended in the amounts (% by mass) shown in Table 8. Note that in Study VIII, di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate was used instead of di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate in Study III.

The results of Study VIII showed that, in Examples 43 to 46 containing phytosterol, as in the Example containing cholesterol (Study III), increasing the amount of solid or paste-like oil component (C-1) in the total amount of solid or paste-like oil component (C-1) and liquid oil component (C-2) improved the skin benefits of the lotion but reduced transparency, while increasing the amount of (C-2) improved the transparency of the lotion but reduced the skin benefits. Therefore, by using both solid or paste-like and liquid oil components, it is possible to control the skin benefits and transparency of the lotion. In other words, if a lotion with improved skin benefits is preferred, the amount of solid or paste-like oil can be increased. Conversely, if a lotion with improved transparency is preferred, the amount of liquid oil can be increased. On the other hand, a comparison of Examples 43 to 46 and Comparative Example 6 revealed that using only a liquid oil resulted in unsatisfactory skin benefits, stability over time, and skin benefits. In other words, it was found that a solid or paste-like oil is essential to obtain a lotion that is transparent, stable over time, and has excellent skin benefits.

[Study IX. Study of the amount and type of component (D)]
Examples 47 to 50 are lotions. In Study IX, component (B) in Study IV described above was changed from cholesterol to phytosterol, and lotions were produced and evaluated under the same conditions as in Study IV. In Examples 47 to 50, components (A) to (E) were blended at the amounts (% by mass) shown in Table 9. Note that in Study IX, di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate was used instead of di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate in Study IV.

The results of Study IX showed that, like the example containing cholesterol (Study IV), Examples 47-50 containing phytosterols showed no significant differences in transparency, stability over time, or skin effects even when the type and amount of component (D) was adjusted, as long as it was within the range normally used in cosmetics.

[Study X. Study of heating and high pressure conditions]
Examples 51 to 54 and Comparative Examples 7 to 8 were lotions. In Study X, component (B) in Study V described above was changed from cholesterol to phytosterol, and lotions were produced and evaluated under the same conditions as Study V. In Examples 51 to 54 and Comparative Examples 7 to 8, components (A) to (E) were blended in the amounts (mass%) shown in Table 10, and the heating and pressurizing conditions for the crude dispersions were adjusted. Note that in Study X, di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate was used instead of di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate in Study V.

As a result of Study X, it was found that when a crude dispersion that was not sufficiently heated was pressurized, as in Comparative Examples 7 and 8, the oil component (C) did not disperse finely in the liquid, resulting in insufficient transparency of the lotion. In contrast, when the crude dispersion was heated to 50°C or higher before pressurization, as in Examples 51 to 54, the oil component was successfully dispersed in the liquid, even though the pressurization conditions were the same as in Comparative Examples 7 and 8, and a lotion with sufficiently high transparency was obtained. Thus, a significant difference in the transparency of the lotion was observed between the Examples in which the crude dispersion was heated immediately before pressurization and the Comparative Examples in which it was not heated. Furthermore, a comparison of Examples 51 to 54 revealed that, as long as the crude dispersion was heated above the melting point of the oil component (C), no significant difference was observed even if the mixture was heated to a higher temperature. On the other hand, with regard to the pressurization conditions, it was found that applying pressure of 100 MPa or higher (particularly 150 MPa), as in Example 54, could enhance the transparency of the cosmetic.

(Prescription example)
The following are examples of formulations in which the present technology can be used as cosmetics. In the following formulation examples, the "balance" in the blending amount (wt%) means that the total amount is 100 wt%.

Formulation Example 1: Lotion (ingredients) (wt%)
1. Hydrogenated lecithin (ingredient A) 0.25%
2. Cholesterol (Component B) 0.1%
3. Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate (ingredient C)
0.03%
4. Ethyl oleate 0.01%
5. Tocopherol 0.001%
6. BG (ingredient D) 10%
7. DPG 1%
8. Glycereth-26 1%
9. Sodium acetyl hyaluronate 0.01%
10. Hydrolyzed hyaluronic acid 0.01%
11. Alcaligenes polysaccharides 0.01%
12. Cellulose gum 0.01%
13. Microcrystalline cellulose 0.01%
14. Tremella fuciformis extract 0.01%
15. Citric acid 0.01%
16. Sodium citrate 0.01%
17. Nicotinamide 10%
18. Carnosine 0.01%
19. Cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol 0.1%
20. Polyglyceryl-10 (eicosanedioate/tetradecanedioate) 0.1%
21. Glycosyltrehalose 0.1%
22. Hydrogenated starch hydrolysate 0.05%
23. PEG-8 0.1%
24. PEG-32 0.1%
25. Damask rose water 1%
26. Quince Seed Extract 0.1%
27. Glycerin 8%
28. Ethanol 4%
29. Phenoxyethanol 0.1%
30. Glyceryl caprylate 0.01%
31. Artemisia capillaris flower extract 0.01%
32. Clove extract 0.01%
33. Polyglyceryl-10 laurate 0.01%
34. Polyglyceryl-10 Pentaisostearate 0.01%
35. Fragrance 0.05%
36. Water (ingredient E) remaining

(Manufacturing method)
(1) Components 1 to 5, 7, and a portion of component 6 were heated to 90°C and dissolved to obtain composition 1.
(2) Composition 1 and a portion of component 36 were mixed at 75°C to obtain composition 2.
(3) Composition 2 was treated in a high-pressure emulsifier (the temperature immediately before pressurization was set to 70° C. or higher, and treatment was carried out at that temperature or higher under a pressure of 70 MPa or higher).
(4) After the pressure treatment, the solution was cooled to a temperature of 15° C. or lower to obtain Composition 3.
(5) A portion of component 6 and components 10 to 14 were mixed and heated to 80°C, and then mixed with a portion of component 36 that had also been heated to 80°C, followed by homogenization to obtain composition 4.
(6) Components 8, 9, and 15 to 27 were dissolved in a portion of component 36 to obtain composition 5.
(7) Components 28 to 35 were mixed together to obtain composition 6.
(8) Compositions 3, 4, and 6 were mixed with composition 5.

Formulation Example 2: Emulsion (ingredients) (wt%)
1. Hydrogenated lecithin (ingredient A) 0.25%
2. Cholesterol (Component B) 0.1%
3. Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate (ingredient C)
0.03%
4. Ethyl oleate 0.1%
5. Tocopherol 0.001%
6. BG (ingredient D) 15%
7. DPG 1%
8. Stearic acid 0.8%
9. Glyceryl stearate 0.2%
10. Cetearyl alcohol 0.4%
11. Behenyl alcohol 0.2%
12. Dipentaerythrityl hexa(hydroxystearate/stearic acid/rosinate)
0.2%
13. Sorbitan palmitate 0.4%
14. Polysorbate 60 0.4%
15. Hydrogenated lysolecithin 0.1%
16. Mineral oil 5%
17. Dimethicone 1%
18. Dicapric acid PG 1%
19. Meadowfoam oil 2%
20. Trimethylolpropane triisostearate 3%
21. Octyldodecanol 0.1%
22. Squalane 2%
23. Cholesteryl hydroxystearate 0.5%
24. TEA 0.8%
25. EDTA-2Na 0.1%
26. Caramel 0.01%
27. (Acrylates/C10-30 alkyl acrylate) crosspolymer 0.2%
28. Carbomer 0.15%
29. Xanthan gum 0.1%
30. Alcaligenes-produced polysaccharides 0.02%
31. Ethanol 2%
32. Phenoxyethanol 0.1%
33. Glyceryl caprylate 0.01%
34. Nicotinamide 3%
35. Fragrance 0.1%
36. Water (ingredient E) remaining

(Manufacturing method)
(1) Components 1 to 3, 5, and 7, and a portion of components 4 and 6 were heated to 90°C and dissolved to obtain composition 1.
(2) Composition 1 and a portion of component 36 were mixed at 75°C to obtain composition 2.
(3) Composition 2 was treated in a high-pressure emulsifier (the temperature immediately before pressurization was set to 70° C. or higher, and treatment was carried out at that temperature or higher under a pressure of 70 MPa or higher).
(4) After the pressure treatment, the solution was cooled to a temperature of 15° C. or lower to obtain Composition 3.
(5) Components 26 to 30 were mixed with a portion of component 6 and heated to 80°C, and then mixed with a portion of component 36 that had also been heated to 80°C, followed by homogenization to obtain composition 4.
(6) A portion of component 6 and components 8 to 23 were heated and dissolved at 80°C to obtain composition 5.
(7) Components 24, 25, and a portion of component 36 were heated and dissolved at 80°C to obtain composition 6.
(8) Composition 5 and Composition 6 were mixed at 80°C to obtain Composition 7.
(9) Components 31 to 33 and 35 were mixed together to obtain composition 8.
(10) Component 34 was mixed with a portion of component 36 to obtain composition 9.
(11) Compositions 3, 4, 8, and 9 were mixed with composition 7.

Formulation Example 3: Emulsion 2
(Ingredients) (Weight%)
1. Hydrogenated lecithin (ingredient A) 0.3%
2. Cholesterol (Component B) 0.1%
3. Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate (ingredient C)
0.03%
4. Ethyl oleate 0.01%
5. BG (ingredient D) 12%
6. DPG 1%
7. Glycerin 4%
8. Batyl alcohol 0.2%
9. Sucrose stearate 0.9%
10. Glyceryl stearate 0.1%
11. PEG-2 stearate 0.1%
12. Sorbitan oleate 0.1%
13. Polysorbate 80 0.4%
14. Jojoba seed oil 0.5%
15. Mineral oil 2%
16. Dimethicone 1%
17. Hydrogenated coconut oil 2%
18. Triethylhexanoin 2%
19. Dimer dilinoleyl diisostearate 0.1%
20. Rice bran oil 1%
21. Vaseline 2%
22. Hydrogenated palm oil 0.5%
23. (Sodium acrylate/sodium acryloyldimethyltaurate) copolymer 0.1%
24. Alcaligenes polysaccharides 0.005%
25. EDTA-2Na 0.04%
26. Caramel 0.01%
27. (Acrylates/C10-30 alkyl acrylate) crosspolymer 0.4%
28. Carbomer 0.1%
29. Isohexadecane 0.1%
30. Sodium hydroxide 0.02%
31. Ethanol 5%
32. Phenoxyethanol 0.4%
33. Fragrance 0.4%
34. Glycine 0.02%
35. Serine 0.01%
36. Polyglutamic acid 0.01%
37. PCA-Na 0.02%
38. Water (ingredient E) remaining

(Manufacturing method)
(1) Components 2 to 4, 6, and a portion of Components 1 and 5 were heated and dissolved at 90°C to obtain Composition 1.
(2) Composition 1 and a portion of component 39 were mixed at 75°C to obtain composition 2.
(3) Composition 2 was treated in a high-pressure emulsifier (the temperature immediately before pressurization was set to 70° C. or higher, and treatment was carried out at that temperature or higher under a pressure of 70 MPa or higher).
(4) After the pressure treatment, the solution was cooled to a temperature of 15° C. or lower to obtain Composition 3.
(5) Components 24 and 26 to 28 were mixed with a portion of component 5 and heated to 80°C, and then mixed with a portion of component 39 that had also been heated to 80°C, followed by homogenization to obtain composition 4.
(6) Components 1 and a portion of 5, and components 7 to 23 and 29 were heated and dissolved at 75°C to obtain composition 5.
(7) A portion of component 39 heated to 75°C was added to composition 5 and mixed to obtain composition 6.
(8) Components 25, 30, 34 to 38 and a portion of component 39 were mixed together to obtain composition 7.
(9) Components 31 to 33 were mixed to obtain composition 8.
(10) Compositions 3, 4, 7, and 8 were mixed with composition 6.

Formulation Example 4: Cream (ingredients) (wt%)
1. Hydrogenated lecithin (ingredient A) 1.25%
2. Cholesterol (Component B) 0.1%
3. Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate (ingredient C)
4.5%
4. Ethyl oleate 0.5%
5. Tocopherol 0.001%
6. BG (ingredient D) 10%
7. DPG 10%
8. Glycerin 6%
9. Citric acid 0.1%
10. Cetearyl alcohol 2%
11. Behenyl alcohol 2%
12. Dipentaerythrityl hexa(hydroxystearate/stearic acid/rosinate)
3%
13. Sorbitan oleate 0.1%
14. Polysorbate 80 0.1%
15. Candelilla wax 0.5%
16. Mineral oil 1%
17. Dimethicone 0.5%
18. PG dicaprylate 0.1%
19. Sodium stearoyl methyl taurate 0.5%
20. Caprylic/capric triglyceride 0.1%
21. Octyldodecanol 0.5%
22. Squalane 5%
23. Cholesteryl hydroxystearate 3.5%
24. (Sodium acrylate/sodium acryloyldimethyltaurate) copolymer 0.01%
25. Hydrogenated polyisobutene 1%
26. EDTA-2Na 0.04%
27. Caramel 0.01%
28. (Acrylates/C10-30 alkyl acrylate) crosspolymer 0.1%
29. Carbomer 0.25%
30. Isohexadecane 0.1%
31. Sodium hydroxide 0.1%
32. Ethanol 2%
33. Phenoxyethanol 0.4%
34. Hydrogenated rapeseed oil fatty acid glycerides 0.23%
35. Fragrance 0.1%
36. DNA-Na 0.1%
37. Water (ingredient E) remaining

(Manufacturing method)
(1) Components 2 and 5 and a portion of components 1, 3, 4, 6, and 7 were heated and dissolved at 90°C to obtain composition 1.
(2) Composition 1 and a portion of component 37 were mixed at 75°C to obtain composition 2.
(3) Composition 2 was treated in a high-pressure emulsifier (the temperature immediately before pressurization was set to 70° C. or higher, and treatment was carried out at that temperature or higher under a pressure of 70 MPa or higher).
(4) After the pressure treatment, the solution was cooled to a temperature of 15° C. or lower to obtain Composition 3.
(5) Components 27 to 29 were mixed with a portion of component 6 and heated to 80°C, and then mixed with a portion of component 37 that had also been heated to 80°C, followed by homogenization to obtain composition 4.
(6) Components 8, 9, 19, and 26 and a portion of components 6, 7, and 37 were heated and dissolved at 75°C to obtain composition 5.
(7) A portion of components 1, 3, and 4 and components 10 to 18, 20 to 25, 30, and 34 were heated and dissolved at 75°C to obtain composition 6.
(8) Composition 5 and Composition 6 were mixed at 75°C to obtain Composition 7.
(9) Components 31, 36 and a portion of component 37 were mixed to obtain composition 8.
(10) Components 32, 33, and 35 were mixed to obtain composition 9.
(11) Compositions 3 to 5, 8, and 9 were mixed with composition 7.

Formulation example 5: Sunscreen 1
(Ingredients) (Weight%)
1. Hydrogenated lecithin (ingredient A) 0.25%
2. Cholesterol (Component B) 0.02%
3. Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate (ingredient C)
0.03%
4. Ethyl oleate 0.01%
5. Tocopherol 0.001%
6. BG (ingredient D) 10%
7. Diethylaminohydroxybenzoylhexyl benzoate 2.0%
8. Bisethylhexyloxyphenol methoxyphenyl triazine 2.0%
9. Polysilicone-15 3.0%
10. Ethylhexyl methoxycinnamate 8.0%
11. Propylene glycol dicaprate 3.0%
12. Isotridecyl isononanoate 2.0%
13. Dextrin isostearate 0.1%
14. Cetostearyl alcohol 1.0%
15. Glyceryl monostearate 0.1%
16. (Dimethicone/phenylvinyldimethicone) crosspolymer 2.0%
17. Polysorbate 80 1.0%
18. PEG-10 hydrogenated castor oil 0.2%
19. Carbomer 0.2%
20. (Acrylates/C10-30 alkyl acrylate) crosspolymer 0.1%
21. Glycerin 1.0%
22. Nicotinamide 3.0%
23. Potassium hydroxide 0.12%
24. EDTA-2Na 0.05%
25. Serine 0.1%
26. Water (ingredient E) remaining 27. Ethanol 8.0%
28. Glyceryl caprylate 0.3%
29. Phenoxyethanol 0.1%
30. Silica (Note 1) 3.0%
31. Fragrance 0.2%
32. Phytosterol (ingredient B) 0.03%
(Note 1) God Ball E-90C (manufactured by Suzuki Oil Industries Co., Ltd.)

(Manufacturing method)
(1) Components 1 to 6 and 32 were heated and dissolved at 90°C to obtain composition 1.
(2) Composition 1 and a portion of component 26 were mixed at 75°C to obtain composition 2.
(3) Composition 2 was treated in a high-pressure emulsifier (the temperature immediately before pressurization was set to 70° C. or higher, and treatment was carried out at that temperature or higher under a pressure of 70 MPa or higher).
(4) After the pressure treatment, the solution was cooled to a temperature of 15° C. or lower to obtain Composition 3.
(5) Components 7 to 18 were heated and dissolved at 80°C to obtain composition 4.
(6) Components 19 to 25 and a portion of component 26 were mixed to obtain composition 5.
(7) Compositions 4 and 5 were mixed at 75°C to obtain composition 6.
(8) Components 27 to 31 were mixed to obtain composition 7.
(9) Compositions 3 and 7 were mixed with composition 6.

Formulation Example 6: Sunscreen 2
(Ingredients) (Weight%)
1. Hydrogenated lecithin (ingredient A) 0.25%
2. Cholesterol (Component B) 0.1%
3. Di(cholesteryl/behenyl/octyldodecyl) lauroyl glutamate (ingredient C)
0.03%
4. Ethyl oleate 0.01%
5. Tocopherol 0.001%
6. BG (ingredient D) 10%
7. Hydrogenated lysolecithin 1.2%
8. Stearic acid 0.5%
9. Hydrogenated polyisobutene 5%
10. Isohexadecane 5%
11. Propylene glycol dicaprate 5%
12. Ethylhexyl methoxycinnamate 5%
13. Diethylaminohydroxybenzoylhexyl benzoate 3%
14. Dimer Dilinoleic Acid (Phytosteryl/Isostearyl/Cetyl/Stearyl/
Behenyl) 1%
15. Stearyl alcohol 2%
16. DPG 20%
17. TEA 0.1%
18. Acetylated sodium hyaluronate 0.1%
19. Sodium hydroxide 0.1%
20. L-Ascorbic acid 2-glucoside 2%
21. Sodium phosphate 0.1%
22. Disodium phosphate 0.1%
23. Phenoxyethanol 0.2%
24. (Acrylates/C10-30 alkyl acrylate) crosspolymer 0.2%
25. Xanthan gum 0.1%
26. Hydrogen dimethicone-treated fine particle zinc oxide (Note 2) 2%
27. Fragrance 0.1%
28. Water (ingredient E) balance 29. Dimethylpolysiloxane-treated titanium dioxide fine particle (Note 3) 3%
30. Bis-ethylhexyloxyphenol methoxyphenyl triazine 2%
(Note 2) MZY-505S (manufactured by Teika Co., Ltd.)
(Note 3) SMT-500SAM (manufactured by Teika Co., Ltd.)

(Manufacturing method)
(1) Components 1 to 6 were heated and dissolved at 90°C to obtain composition 1.
(2) Composition 1 and a portion of component 28 were mixed at 75°C to obtain composition 2.
(3) Composition 2 was treated in a high-pressure emulsifier (the temperature immediately before pressurization was set to 70° C. or higher, and treatment was carried out at that temperature or higher under a pressure of 70 MPa or higher).
(4) After the pressure treatment, the solution was cooled to a temperature of 15° C. or lower to obtain Composition 3.
(5) Components 7 to 15, 26, 29, and 30 were heated and dissolved at 80°C to obtain composition 4.
(6) Components 16 to 22, 24, and 25 were mixed with a portion of component 28 to obtain composition 5.
(7) Compositions 4 and 5 were mixed at 75°C to obtain composition 6.
(8) Components 23 and 27 were mixed to obtain composition 7.
(9) Compositions 3 and 7 were mixed with composition 6.

Formulation Example 7: Lotion (ingredients) (wt%)
1. Hydrogenated lecithin (ingredient A) 0.25%
2. Phytosterol (ingredient B) 0.04%
3. Di(octyldodecyl/phytosteryl/behenyl) lauroyl glutamate (ingredient C)
0.03%
4. Ethyl oleate 0.01%
5. Tocopherol 0.001%
6. BG (ingredient D) 10%
7. Alcaligenes-produced polysaccharides 0.01%
8. Cellulose gum 0.01%
9. Microcrystalline cellulose 0.01%
10. Tremella fuciformis extract 0.01%
11. Citric acid 0.01%
12. Sodium citrate 0.01%
13. Damask rose flower water 1%
14. Quince Seed Extract 0.1%
15. Glycerin 8%
16. Ethanol 4%
17. Glyceryl caprylate 0.01%
18. Artemisia capillaris flower extract 0.01%
19. Clove extract 0.01%
20. Polyglyceryl-10 laurate 0.01%
21. Fragrance 0.05%
22. Water (ingredient E) remaining

(Manufacturing method)
(1) Components 1 to 5 and a portion of component 6 were heated to 90°C and dissolved to obtain composition 1.
(2) Composition 1 and a portion of component 22 were mixed at 75°C to obtain composition 2.
(3) Composition 2 was treated in a high-pressure emulsifier (the temperature immediately before pressurization was set to 70° C. or higher, and treatment was carried out at that temperature or higher under a pressure of 70 MPa or higher).
(4) After the pressure treatment, the solution was cooled to a temperature of 15° C. or lower to obtain Composition 3.
(5) A portion of component 6 and components 7 to 10 were mixed and heated to 80°C, and then mixed with a portion of component 22 that had also been heated to 80°C, followed by homogenization to obtain composition 4.
(6) Components 11 to 15 were dissolved in a portion of component 22 to obtain composition 5.
(7) Components 16 to 21 were mixed together to obtain composition 6.
(8) Compositions 3, 4, and 6 were mixed with composition 5.

In the above, this specification has described embodiments and examples of the present invention in order to express the content of the present invention. However, the present invention is not limited to the above embodiments and examples, and includes modifications and improvements that would be obvious to a person skilled in the art based on the matters described in this specification.

The present invention relates to a cosmetic composition and a method for producing the same. Therefore, the present invention can be suitably used in the cosmetics manufacturing industry.

Claims (6)

Phospholipids as the primary dispersant;
Sterols and
an oil-derived component that is solid or pasty when undispersed at room temperature;
A polyhydric alcohol,
Contains water,
the sterol is one or two selected from cholesterol and phytosterol;
When the sterol contains cholesterol, the ratio of the phospholipid to the cholesterol (phospholipid/cholesterol) is 2.0 to 5.5;
When the sterol contains a phytosterol, the blending ratio of the phospholipid to the phytosterol (phospholipid/phytosterol) is 4 to 9;
The content of the component derived from the oil agent in the total composition is 0.05% by mass or more and less than 1% by mass.
A transparent or translucent liquid cosmetic composition. The composition according to claim 1, which has a transmittance of 65% or more. The composition according to claim 1 or 2, wherein the phospholipid has a phosphatidylcholine content of 60% by mass or more. It is a lotion
The composition according to any one of claims 1 to 3. A method for producing a transparent or translucent liquid cosmetic composition, comprising:
a heating step of heating a composition containing a phospholipid as a primary dispersant, a sterol, a solid or pasty oil, a polyhydric alcohol, and water;
a pressurizing step of pressurizing the heated composition,
the sterol is one or two selected from cholesterol and phytosterol;
When the sterol is cholesterol, the ratio of the phospholipid to the cholesterol (phospholipid/cholesterol) is 2.0 to 5.5;
When the sterol is a phytosterol, the blending ratio of the phospholipid to the phytosterol (phospholipid/phytosterol) is 4 to 9;
The content of the component derived from the oil agent in the total composition is 0.05% by mass or more and less than 1% by mass.
A method for producing a cosmetic composition in which the oil agent is dispersed. The method according to claim 5, wherein the heating step heats the composition to 50 to 100°C.