Cosmetics and methods for manufacturing the same

Abstract

To provide a cosmetic product that blends well with the skin and provides excellent firming and tightening effects. [Solution] The cosmetic composition contains (A) a glycine derivative represented by formula (1) or a salt thereof, (B) a liquid oil that is liquid at 25°C and contains at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters, and (C) a solid or semi-solid oil that is solid at 25°C and contains at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax. TIFF2026111285000010.tif43169 (R 1 and R 2 R independently represents a hydrogen atom, alkyl group, alkenyl group, aryl group, aralkyl group, aminomethylcarbonyl group, amidino group, alkylcarbonyl group, etc. 3 (This represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group.)

Description

[Technical Field]

[0001] This disclosure relates to cosmetics and methods for manufacturing the same. [Background technology]

[0002] Oil-in-water emulsion cosmetics are known in which large oily particles with an average particle size of 50 μm to 10 mm are dispersed in the aqueous phase. Cosmetics containing such large oily particles are not only visually novel and beautiful because the oily particles are of a size that can be seen with the naked eye, but they also provide an unprecedented user experience: a fresh and refreshing feeling when applied to the skin, which becomes moisturized over time. Furthermore, if biodegradable oil-soluble components are held within the large oily particles, the degradation of those oil-soluble components can be suppressed.

[0003] For example, an oil-in-water emulsion cosmetic has been proposed in which oily particles (capsules) with an average particle size of 50 μm to 10 mm, containing oil that is solid or semi-solid at room temperature (25°C), are dispersed in an aqueous phase (see Patent Document 1). [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Patent No. 7229914 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In view of the above, one embodiment of the present disclosure aims to provide a cosmetic product that is excellent in terms of skin compatibility and firming effect. [Means for solving the problem]

[0006] In order to solve the above problems, the cosmetic according to the present disclosure contains: (A) a glycine derivative represented by formula (1) or a salt thereof; (B) a liquid oil component that is liquid at 25°C and contains at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid ester; and (C) a solid or semi-solid solid oil component that is solid or semi-solid at 25°C and contains at least one selected from the group consisting of glyceryl monoalkyl ether, a higher alcohol having 18 or more carbon atoms, and candelilla wax.

[0007] [Chem.] (In the formula, R , , , 3 , 1 , , 2 ,

[0010] ,

[0009] , , , , , ,

[0008] , , 2 , 3 , , , 1 , , , , , ,

[0007] , and R 2 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, an arylcarbonyl group, or an aralkylcarbonyl group, and R 3 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, the R 1 , the R 2 , and the R 3 will not all become hydrogen atoms simultaneously.) [Advantages of the Invention]

[0008] According to one embodiment of the present disclosure, a cosmetic excellent in skin affinity and firming and tightening feeling can be provided. [Modes for Carrying Out the Invention]

[0009] Hereinafter, embodiments of the present disclosure will be described in detail. Note that the embodiments are not limited by the following description and can be appropriately changed without departing from the gist of the present disclosure. In addition, in this specification, "~" indicating a numerical range means including the numerical values described before and after it as the lower limit value and the upper limit value, unless otherwise specified.

[0010] (Cosmetic) The cosmetic according to one embodiment contains (A) a glycine derivative represented by formula (1) or a salt thereof (hereinafter sometimes referred to as the "(A)" component), and (B) a liquid oil component that is liquid at 25°C and contains at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid ester (hereinafter sometimes referred to as the "(B)" component), and (C) a solid or semi-solid solid oil component that is solid at 25°C and contains at least one selected from the group consisting of glyceryl monoalkyl ether, a higher alcohol having 18 or more carbon atoms, and candelilla wax (hereinafter sometimes referred to as the "(C)" component). The cosmetic according to one embodiment may further contain other components as needed.

[0011]

Chem.

[0012] The cosmetic according to one embodiment is a cosmetic excellent in skin affinity and firming and tightening feeling. In the cosmetic according to one embodiment, "skin affinity" means that the cosmetic easily penetrates into the skin. Therefore, it is different from the "moist" feeling of feeling moist after the cosmetic penetrates into the skin.

[0013] The inventors of the present invention have found that the capsule-containing cosmetic composition described in Patent Document 1 does not provide satisfactory absorption into the skin. In contrast, they have found that by incorporating a specific amount of the glycine derivative represented by formula (1) or its salt, the cosmetic composition exhibits excellent absorption into the skin and also provides superior firming and tightening effects.

[0014] While there are no particular limitations on the form of the cosmetic composition according to one embodiment, it is preferable to have an oil-in-water cosmetic composition containing an oily capsule with a capsule structure in which a solid oil component (C) forms an outer layer coating an inner phase containing a liquid oil component (B) in an aqueous solvent. Crystallizing the solid oil forming the outer layer can also result in a moderate hardness, creating a unique feel when used.

[0015] In a cosmetic composition according to one embodiment, the aqueous solvent is not particularly limited as long as it is a solvent that does not dissolve components (B) and (C), and examples include water and alcohol. Specifically, those described in the section "Aqueous Solvents" below can be used.

[0016] There are no particular restrictions on the average particle size of the oily capsules, and they can be appropriately selected depending on the purpose, but 100 μm or more is preferred, 100 μm to 1.5 mm is more preferred, and 100 μm to 1 mm is even more preferred. When the average particle size of the capsules is 100 μm or more, it is easy to impart a fresh and refreshing feeling when applied to the skin, and it can also impart a moist feeling over time. It can also provide a visually appealing result to the user. The average particle size of the oily capsules can be measured by microscopic observation.

[0017] There are no particular restrictions on the content of oily capsules in the cosmetic composition according to one embodiment, and can be appropriately selected depending on the content of component (B) and component (C), but preferably 0.5% to 10% by mass, more preferably 1% to 5% by mass, and even more preferably 2% to 4% by mass, relative to the total mass of the cosmetic composition.

[0018] <(A) Glycine derivatives or salts thereof represented by formula (1)> A cosmetic composition according to one embodiment contains a glycine derivative represented by formula (1) or a salt thereof (component (A)).

[0019] [ka] (In the formula, R 1 and R 2 Each of these independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, an arylcarbonyl group, or an aralkylcarbonyl group, and R 3 R represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, the R 1 , the R 2 , and the R 3 (They cannot all become hydrogen atoms at the same time.)

[0020] In this disclosure, “each independently” means R 1 and R 2 However, this means that they may be the same or different.

[0021] In equation (1), R 1 and R 2 Preferably, one of them is a hydrogen atom and the other is an alkyl group, an aminomethylcarbonyl group, or an alkylcarbonyl group, R 1 and R 2 It is more preferable that one of them is a hydrogen atom and the other is an alkyl group having 1 to 3 carbon atoms, an aminomethyl carbonyl group, or an alkylcarbonyl group having 1 to 8 carbon atoms, R 1 and R 2 It is even more preferable that one of them is a hydrogen atom and the other is a methyl group, an aminomethyl carbonyl group, or a benzyl carbonyl group.

[0022] In equation (1), R 3It is preferably a hydrogen atom or an alkyl group, more preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and even more preferably a hydrogen atom or a methyl group.

[0023] (A) If component (A) is a salt of a glycine derivative represented by formula (1), there are no particular restrictions on the type of salt, as long as it is a pharmacologically acceptable salt, and it may be an inorganic salt or an organic salt. Examples of inorganic salts include hydrochloride, sulfate, phosphate, hydrobromide, sodium salt, potassium salt, magnesium salt, calcium salt, magnesium salt, and ammonium salt. Examples of organic salts include acetate, lactate, maleate, fumarate, tartrate, methanesulfonate, p-toluenesulfonate, triethanolamine salt, and amino acid salt.

[0024] Specific examples of component (A) include sarcosine (N-methylglycine), N-ethylglycine, N-propylglycine, N-diethylglycine, N-dimethylglycine, N-amidinoglycine, N-amidino-N-methylglycine, glycylglycine, phenacetulic acid, glycine methyl ester hydrochloride, glycine ethyl ester hydrochloride, glycine n-butyl ester hydrochloride, glycine t-butyl ester hydrochloride, glycine n-propyl ester hydrochloride, glycine n-pentyl ester hydrochloride, and glycine benzyl ester hydrochloride. These may be used individually or in combination of two or more. Among these, it is preferable that component (A) contains glycylglycine or a salt thereof. In formula (1), glycylglycine is R 1 and R 2 Either one of them is a hydrogen atom, and the other is an aminomethylcarbonyl group, R 3 That is a hydrogen atom.

[0025] (A) Component may be synthesized using known methods or a commercially available product.

[0026] In a cosmetic composition according to one embodiment, there are no particular restrictions on the content of component (A), and it can be appropriately selected depending on the purpose, but it is preferably 0.05% to 5% by mass, more preferably 0.1% to 5% by mass, even more preferably 0.5% to 3% by mass, and particularly preferably 1% to 2% by mass, relative to the total mass of the cosmetic composition. When the content of component (A) is 0.05% to 5% by mass, skin compatibility and firmness / tightening sensation are improved. Furthermore, since excessive inclusion of component (A) tends to reduce the moisturizing sensation, it is preferable that the content be 5% by mass or less.

[0027] <(B) Liquid oil that is liquid at 25℃> A cosmetic composition according to one embodiment contains a liquid oil (component (B)) that is liquid at 25°C and contains at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters. Furthermore, component (B) may optionally contain a liquid oil that is liquid at 25°C other than at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters (hereinafter sometimes referred to as "other liquid oils").

[0028] <<Silicone oil>> There are no particular restrictions on the silicone oil used; it can be appropriately selected depending on the purpose. Examples include linear silicones, cyclic silicones, and modified silicone oils.

[0029] Examples of chain-like silicones include dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane (phenylmethicone), and methylhydrogenpolysiloxane.

[0030] Examples of cyclic silicones include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.

[0031] Examples of modified silicone oils include amino-modified silicone oil, polyether-modified silicone oil, carboxy-modified silicone oil, alkyl-modified silicone oil, ammonium salt-modified silicone oil, and fluorine-modified silicone oil.

[0032] These silicone oils may be used individually or in combination of two or more. Among these, it is preferable that the silicone oil contains dimethylpolysiloxane (dimethicone).

[0033] The silicone oil may be synthesized appropriately by known methods, or a commercially available product may be used.

[0034] <<Polyhydric alcohol fatty acid esters>> Polyhydric alcohol fatty acid esters have a structure in which a polyhydric alcohol and a fatty acid are bonded together by an ester linkage.

[0035] The polyhydric alcohol constituting the polyhydric alcohol fatty acid ester is not particularly limited as long as it is a dihydric or higher alcohol, with dihydric to hexahydric alcohols being preferred, and dihydric to tetrahydric alcohols being more preferred.

[0036] Specific examples of polyhydric alcohols that make up polyhydric alcohol fatty acid esters include ethanol, cetanol, glycerin, polyglycerin, erythritol, hexyl alcohol, isopropanol, 2-octyldodecyl alcohol, octyl alcohol, isocetyl alcohol, isodecyl alcohol, isostearyl alcohol, sorbitan, sorbitol, sucrose, ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glucose, decyl alcohol, caprylyl alcohol, and octanol.

[0037] There are no particular restrictions on the fatty acids in polyhydric alcohol fatty acid esters, and they can be appropriately selected depending on the purpose. However, saturated or unsaturated fatty acids with 6 to 22 carbon atoms are preferred, saturated or unsaturated fatty acids with 6 to 18 carbon atoms are more preferred, saturated or unsaturated fatty acids with 6 to 14 carbon atoms are even more preferred, and saturated or unsaturated fatty acids with 6 to 12 carbon atoms are particularly preferred.

[0038] There are no particular restrictions on the number of ester bonds in a polyhydric alcohol fatty acid ester, and it can be appropriately selected depending on the purpose, but 1 to 6 is preferred, 3 to 5 is more preferred, and 4 to 5 is even more preferred.

[0039] There are no particular restrictions on the polyhydric alcohol fatty acid esters, and they can be appropriately selected depending on the purpose. Examples include octanoic acid esters such as cetyl octanoate; isooctanoic acid esters such as glyceryl tri-2-ethylhexanoate and pentaerythrityl tetraethylhexanoate; lauric acid esters such as hexyl laurate; myristic acid esters such as isopropyl myristate and octyldodecyl myristate; palmitic acid esters such as octyl palmitate; stearic acid esters such as isocetyl stearate; isostearic acid esters such as isopropyl isostearate; isopalmitic acid esters such as octyl isopalmitate; oleic acid esters such as isodecyl oleate; adipic acid diesters such as diisopropyl adipate; sebacate diesters such as diethyl sebacate; and diisostearyl malate. These may be used individually or in combination of two or more. Among these, polar oils are preferred as polyhydric alcohol fatty acid esters, more preferably containing isooctanoic acid esters, and even more preferably containing pentaerythrityl tetraethylhexanoate.

[0040] Polyhydric alcohol fatty acid esters may be synthesized using known methods or commercially available products.

[0041] In the cosmetic composition according to one embodiment, there are no particular restrictions on the content of at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters, and it can be appropriately selected depending on the purpose, but it is preferably 0.01% to 100% by mass, more preferably 50% to 100% by mass, even more preferably 80% to 100% by mass, and particularly preferably 90% to 100% by mass, relative to the total content of component (B).

[0042] <<Other liquid oils>> Other liquid oils are not particularly limited as long as they do not impair the effects of the cosmetic composition according to one embodiment, and can be appropriately selected depending on the purpose. Examples include oils and fats, hydrocarbon oils, etc. These may be used individually or in combination of two or more.

[0043] Examples of oils and fats include vegetable oils such as avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, sesame oil, peach oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, elm oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnamon oil, jojoba oil, wheat germ oil, cocoa butter, coconut oil, hydrogenated coconut oil, palm oil, palm kernel oil, Japanese wax kernel oil, apricot kernel oil, cinnamon oil, grape oil, almond oil, sunflower oil, wheat germ oil, rice germ oil, and evening primrose oil; and animal fats such as egg yolk oil, horse fat, beef fat, sheep fat, hydrogenated beef fat, pork fat, beef bone fat, and beef tallow.

[0044] Examples of hydrocarbon oils include linear, branched, or volatile hydrocarbon oils. Specific examples of hydrocarbon oils include liquid paraffin, squalane, squalene, pristane, isoparaffin, α-olefin oligomers, and hydrogenated polydecene. You may use it.

[0045] In the cosmetic composition according to one embodiment, the content of other liquid oils relative to the total content of component (B) is not particularly limited as long as it does not impair the effect of the cosmetic composition according to one embodiment, and can be appropriately selected according to the content of at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters.

[0046] In a cosmetic composition according to one embodiment, there are no particular restrictions on the content of component (B), and it can be appropriately selected depending on the purpose, but 0.01% to 10% by mass is preferred, 0.1% to 5% by mass is more preferred, and 1% to 3% by mass is even more preferred. When the content of component (B) is 0.01% to 10% by mass, the usability, such as skin compatibility, can be improved.

[0047] <(C)Solid or semi-solid oils at 25℃> A cosmetic composition according to one embodiment contains a solid or semi-solid oil (component (C)) that is solid at 25°C and contains at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax. Furthermore, component (C) may optionally contain a solid or semi-solid oil (hereinafter sometimes referred to as "other solid oils") that is solid at 25°C and contains at least one other solid oil (hereinafter referred to as "other solid oils") selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax.

[0048] In one embodiment of the cosmetic composition, component (C) preferably acts as an amphiphilic substance. In one embodiment of the cosmetic composition, an "amphiphilic substance" is a molecule that has both hydrophobic (lipophilic) and hydrophilic (hydrophilic) parts within its molecule. Therefore, in water, the hydrophobic parts of component (C) aggregate due to the hydrophobic effect, forming a spherical aggregate micelle with the hydrophilic parts on the outside that come into contact with water and the lipophilic parts on the inside. At this time, the lipophilic parts on the inside can be incorporated into component (B) to form an oily capsule.

[0049] In the manufacture of a cosmetic composition according to one embodiment, there are no particular restrictions on the method for forming oily capsules, and a suitable method can be selected depending on the purpose. For example, the following method can be used. First, component (C), component (A), component (B), and other components as needed are mixed and dissolved together to form liquid oily particles in an aqueous solvent. Then, the mixture is cooled to precipitate only component (C), forming a film that embeds component (B), thereby forming oily capsules. In order to form oily capsules in this way, component (C) must be liquid under the temperature conditions during the mixing and dissolution stage between the cosmetic components (A), (B), and (C), and other components as needed, and the aqueous solvent, and must be solid under the temperature conditions after cooling. The temperature conditions after cooling include the temperature in the usage environment of the cosmetic composition according to one embodiment, and are therefore room temperature.

[0050] Therefore, there are no particular restrictions on the melting point of component (C), but it is preferably 45°C to 85°C, more preferably 50°C to 85°C, even more preferably 55°C to 85°C, and particularly preferably 65°C to 85°C. When the melting point of component (C) is 45°C or higher, the film is less likely to melt in the usage environment of the cosmetic composition according to one embodiment, and it has excellent stability at high temperatures. Furthermore, when the melting point of component (C) is 85°C or lower, the ability to form and disperse oily capsules is good.

[0051] <<Glyceryl monoalkyl ether>> Glyceryl monoalkyl ethers have a structure in which glycerin and alkyl are linked by an ether bond.

[0052] There are no particular restrictions on the alkyl group that constitutes the glyceryl monoalkyl ether, and it can be appropriately selected depending on the purpose, but linear or branched alkyl groups having 16 or more carbon atoms are preferred, linear or branched alkyl groups having 16 to 24 carbon atoms are more preferred, and linear or branched alkyl groups having 18 to 22 carbon atoms are even more preferred.

[0053] Specific examples of glyceryl monoalkyl ethers include glyceryl monostearyl ether (batyl alcohol) (melting point: 70°C) and glyceryl monocetyl ether (chymyl alcohol) (melting point: 58°C to 68°C).

[0054] Glyceryl monoalkyl ether may be synthesized by known methods as appropriate, or a commercially available product may be used.

[0055] <<Higher alcohols with 18 or more carbon atoms>> Higher alcohols with 18 or more carbon atoms may be linear or branched. Specific examples of higher alcohols with 18 or more carbon atoms include behenyl alcohol (melting point: 68°C) and stearyl alcohol (melting point: 52°C to 62°C). These may be used individually or in combination of two or more. Among these, behenyl alcohol is preferred as the higher alcohol with 18 or more carbon atoms.

[0056] Higher alcohols with 18 or more carbon atoms may be synthesized by known methods or commercially available products.

[0057] <<Candelilla Low>> The melting point of candelilla wax is 71°C. Candelilla wax may be synthesized using known methods or commercially available products may be used.

[0058] Furthermore, in the cosmetic composition according to one embodiment, there are no particular restrictions on the content of at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax, and it can be appropriately selected according to the purpose, but it is preferably 0.1% to 100% by mass, more preferably 0.5% to 100% by mass, even more preferably 50% to 100% by mass, even more preferably 80% to 100% by mass, and particularly preferably 90% to 100% by mass, relative to the total content of component (C). When the content of at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax is 0.1% by mass or more relative to the total content of component (C), the average particle size of the oily capsules can be set to a suitable range, and variations in the size of the oily capsules are less likely to occur.

[0059] Furthermore, in the example described in Patent Document 1, it is disclosed that by using candelilla wax as a solid or semi-solid oil component at 25°C, oily particles can be formed well in the aqueous phase, and the average particle size of the formed oily particles was in the range of 50 μm to 10 mm.

[0060] <<Other solid oils>> Other solid oils are not particularly limited as long as they do not impair the effect of the cosmetic composition according to one embodiment, and can be appropriately selected depending on the purpose. Examples include hydrocarbon oils, higher alcohols with fewer than 18 carbon atoms, higher fatty acids, waxes, glycerin fatty acid esters, ester oils, fats and oils, fatty acid monocarboxylic acid lanolin alcohol esters, and the like. These may be used individually or in combination of two or more.

[0061] Examples of hydrocarbon oils include linear, branched, or volatile hydrocarbon oils. Specific examples of hydrocarbon oils include ozokerite, solid paraffin, ceresin, beeswax, varicowax, polyethylene wax, silicone wax, polybutene, microcrystalline wax, and petrolatum.

[0062] Examples of higher alcohols with fewer than 18 carbon atoms include those with 6 or more carbon atoms but fewer than 18, such as lauryl alcohol, myristyl alcohol, cetyl alcohol, and hexyldecanol.

[0063] Examples of high-grade fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, 12-hydroxystearic acid, undecylenic acid, lanolinic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid, and 12-hydroxystearic acid.

[0064] Examples of waxes include hydrogenated jojoba oil, cocoa butter, Japanese wax, beeswax, jojoba wax, candelilla wax, cotton wax, carnauba wax, bayberry wax, privet wax, whale wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, isopropyl lanolinate, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, and shellac wax.

[0065] Examples of glycerol fatty acid esters include (behenate / eicosanedioate)glyceryl.

[0066] An example of an ester oil is myristyl myristate.

[0067] Examples of oils and fats include hydrogenated castor oil, hydrogenated oils, hydrogenated palm oil, palm oil, hydrogenated coconut oil, and various hydrogenated animal and vegetable oils.

[0068] In the cosmetic composition according to one embodiment, the content of other solid oils relative to the total content of component (C) is not particularly limited as long as it does not impair the effect of the cosmetic composition according to one embodiment, and can be appropriately selected according to the content of at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax.

[0069] In a cosmetic composition according to one embodiment, there are no particular restrictions on the content of component (C), and it can be appropriately selected depending on the purpose, but 0.01% to 10% by mass is preferred, 0.01% to 5% by mass is more preferred, and 0.1% to 1% by mass is even more preferred. When the content of component (C) is 0.01% to 10% by mass, the usability, such as skin compatibility, can be improved.

[0070] In the cosmetic composition according to one embodiment, there are no particular restrictions on the total content (B+C) of component (B) and component (C), and it can be appropriately selected depending on the purpose, but it is preferably 0.5% to 10% by mass, more preferably 1% to 5% by mass, and even more preferably 2% to 4% by mass, relative to the total mass of the cosmetic composition.

[0071] -Mass ratio [(B) / (B+C)]- In a cosmetic composition according to one embodiment, the mass ratio [(B) / (B+C)] of the content of component (B) (mass%) to the total content (B+C) (mass%) of component (B) and component (C) is not particularly limited and can be appropriately selected depending on the purpose, but 0.50 to 0.95 is preferred, 0.60 to 0.90 is more preferred, and 0.80 to 0.90 is even more preferred. When the mass ratio [(B) / (B+C)] is 0.50 to 0.95, the stability of the oily capsules can be improved, and the oily capsules can be given an appropriate firmness, improving usability such as skin compatibility.

[0072] -Mass ratio [(C) / (B+C)]- In a cosmetic composition according to one embodiment, the mass ratio [(C) / (B+C)] of the content of component (C) (mass%) to the total content (B+C) (mass%) of component (B) and component (C) is not particularly limited and can be appropriately selected depending on the purpose, but 0.05 to 0.50 is preferred, 0.05 to 0.40 is more preferred, 0.10 to 0.30 is even more preferred, and 0.10 to 0.20 is particularly preferred. When the mass ratio [(C) / (B+C)] is 0.05 or higher, it is easier to function as a coating material for oily capsules and the stability of the oily capsules can be improved. Furthermore, when the mass ratio [(C) / (B+C)] is 0.50 or lower, the oily capsules can be given an appropriate firmness and the usability such as skin compatibility can be improved.

[0073] <Other ingredients> A cosmetic composition according to one embodiment may contain other components besides components (A), (B), and (C). There are no particular restrictions on the other components, and they can be appropriately selected from known components used in cosmetics. Examples include aqueous solvents, water-soluble polymers, oil-soluble thickeners, glycols, glycerins, sugar alcohols, sugars, powders, pigments, dyes, pH adjusters, surfactants other than component (C), powder components, fragrances, and pharmaceuticals other than component (A). These may be used individually or in combination of two or more.

[0074] The content of other components in the cosmetic composition according to one embodiment is not particularly limited, as long as it does not impair the effect of the cosmetic composition according to one embodiment, and can be appropriately selected according to the purpose.

[0075] <<Aqueous solvent>> As described above, from the viewpoint of making the cosmetic composition according to one embodiment an oil-in-water type cosmetic composition, it is preferable that the cosmetic composition according to one embodiment contains an aqueous solvent.

[0076] Examples of aqueous solvents include water and lower alcohols. Examples of lower alcohols include alcohols with 5 or fewer carbon atoms. Specific examples of lower alcohols include methanol, ethanol, propyl alcohol, isopropyl alcohol, 2-amino-2-methyl-1-propanol, and 2-amino-2-methyl-1,3-propanediol. These may be used individually or in combination of two or more.

[0077] <<Water-soluble polymer>> In one embodiment, the cosmetic composition containing a water-soluble polymer is preferable because it acts as a water-soluble thickener that can thicken aqueous solvents, thereby improving the stability of oily capsules.

[0078] There are no particular restrictions on the water-soluble polymers used, and they can be appropriately selected depending on the purpose. Examples include plant-based polymers, animal-based polymers, microbial-based polymers, starch-based polymers, cellulose-based polymers, alginate-based polymers, vinyl-based polymers, acrylic polymers, inorganic water-soluble polymers, polyoxyethylene-based polymers, and polyoxyethylene-polyoxypropylene copolymer polymers. These may be used individually or in combination of two or more.

[0079] Examples of plant-derived polymers include gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, gellan gum, carrageenan, pectin, agar, quince seed, and algae colloid (brown algae extract).

[0080] Examples of animal-derived polymers include collagen, casein, albumin, and gelatin.

[0081] Examples of microbial polymers include xanthan gum, dextran, succinoglucan, and pullulan.

[0082] Examples of starch-based polymers include plant starches such as corn, wheat, potatoes, and rice; carboxymethyl starch; and methylhydroxypropyl starch.

[0083] Examples of cellulose-based polymers include methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose, crystalline cellulose, and cellulose powder.

[0084] Examples of alginate-based polymers include sodium alginate and propylene glycol alginate.

[0085] Examples of vinyl polymers include polyvinyl alcohol, polyvinyl acetate, polyvinyl methyl ether, polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymers, carboxyvinyl polymers (carbomers), and alkyl-modified carboxyvinyl polymers.

[0086] Examples of acrylic polymers include sodium polyacrylate, polyethyl acrylate, polyacrylate alkanolamine, alkyl methacrylate and dimethylaminoethyl methacrylate copolymer, poly2-acrylamido-2-methylpropanesulfonic acid, and polymethacryloyloxytrimethylammonium.

[0087] Examples of inorganic water-soluble polymers include polyethyleneimine, cationic polymers, bentonite, aluminum magnesium silicate, laponite, hectorite, and anhydrous silicic acid.

[0088] These water-soluble polymers may be used individually or in combination of two or more. Among these, the water-soluble polymers preferably include microbial polymers and vinyl polymers, and more preferably include xanthan gum, carboxyvinyl polymer (carbomer), and alkyl-modified carboxyvinyl polymer.

[0089] Alkyl-modified carboxyvinyl polymers possess surfactant properties and also have the ability to prevent aggregation and coalescence of oily capsules, making them particularly suitable as water-soluble polymers. Examples of alkyl-modified carboxyvinyl polymers include polymers of acrylic acid and (meth)acrylate. There are no particular restrictions on the number of carbon atoms in the alkyl group of the acrylic acid methacrylate copolymer, but 10 to 30 is preferred. In the cosmetic composition according to one embodiment, "(meth)acrylic acid" means at least one selected from the group consisting of acrylic acid and methacrylic acid. A specific example of an acrylic acid methacrylate copolymer is acrylicates / (meth)acrylate (C10-C30) crosspolymer.

[0090] The water-soluble polymer may be synthesized by known methods or a commercially available product. Examples of commercially available water-soluble polymers include (acrylates / alkyl acrylate (C10-C30)) crosspolymers such as CARBOPOL® 1342, PEMULENT® TR-1 Polymeric Emulsifier, and PEMULENT® TR-2 Polymeric Emulsifier (all manufactured by Lubrizol). The number in parentheses indicates the number of carbon atoms in the alkyl group.

[0091] The content of the water-soluble polymer is not particularly limited as long as it does not impair the effect of the cosmetic composition according to one embodiment, and can be appropriately selected depending on the type of water-soluble polymer, the desired degree of thickening, etc. When an alkyl-modified carboxyvinyl polymer is selected as the water-soluble polymer, the content is preferably 0.001% to 1.0% by mass, and more preferably 0.01% to 0.5% by mass, relative to the total mass of the aqueous solvent.

[0092] <<Oil-soluble thickener>> Examples of oil-soluble thickeners include condensates of dibenzylidenesorbitol, tripenzylidenesorbitol, dibenzylidenexylitol, benzaldehydes, etc., with pentavalent or higher alcohols; metal soaps such as calcium stearate, calcium palmitate, lithium 2-ethylhexanoate, and aluminum 12-hydroxystearate; amides and esters of N-acyl amino acids such as dibutylamide lauroyl glutamate, stearylamide lauroyl glutamate, dicaproyllysine laurylamine salt, dicaproyllysine lauryl ester, and dicaproyllysine lauroylphenylalanine laurylamide; derivatives such as amine salts; dextrin fatty acid esters; and 12-hydroxystearic acid. These may be used individually or in combination of two or more.

[0093] <<Glycols>> Examples of glycols include propylene glycol, dipropylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, diethylene glycol, triethylene glycol, and polyethylene glycol. These may be used individually or in combination of two or more.

[0094] <<Glycerin-based products>> Examples of glycerin compounds include glycerin, diglycerin, and polyglycerin. These may be used individually or in combination of two or more types.

[0095] <<Sugar alcohols>> Examples of sugar alcohols include sorbitol, mannitol, maltitol, xylitol, and erythritol. These may be used individually or in combination of two or more.

[0096] <<Sugars>> Examples of sugars include fructose, glucose, galactose, maltose, lactose, and trehalose. These may be used individually or in combination of two or more.

[0097] <<Powdered ingredients>> The powdered components may be inorganic powders or organic powders. These may be used individually or in combination of two or more.

[0098] Examples of inorganic powders include mica, talc, kaolin, sericite, muscovite, phlogopite, synthetic mica, rose mica, biotite, thiamite, synthetic mica, anhydrous silicic acid (silica), aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, aluminum oxide, barium sulfate, zeolite, titanium dioxide, zinc oxide, and boron nitride.

[0099] Examples of organic powders include polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, calcium carbonate powder, magnesium carbonate powder, and copolymer resin powder of styrene and acrylic acid.

[0100] <<Pigment>> Examples of pigments include inorganic pigments, organic pigments, pearl pigments, and metal powder pigments. These may be used individually or in combination of two or more types.

[0101] Examples of inorganic pigments include inorganic white pigments such as titanium dioxide and zinc oxide; inorganic red pigments such as iron oxide (red iron oxide); inorganic yellow pigments such as yellow iron oxide and loess; inorganic black pigments such as black iron oxide and carbon black; inorganic green pigments such as chromium oxide, chromium hydroxide, and cobalt titanate; and inorganic blue pigments such as ultramarine and navy blue.

[0102] Examples of organic pigments include Pigment Red 3, Pigment Red 104, Pigment Red 106, Pigment Red 201, Pigment Red 202, Pigment Red 204, Pigment Red 205, Pigment Red 220, Pigment Red 226, Pigment Red 227, Pigment Red 228, Pigment Red 230, Pigment Red 401, Pigment Red 405, Pigment Red 505, Pigment Orange 203, Pigment Orange 204, Pigment Orange 205, Pigment Yellow 4, Pigment Yellow 5, Pigment Yellow 202, Pigment Yellow 203, Pigment Yellow 205, Pigment Yellow 401, Pigment Blue 1, Pigment Blue 404, Pigment Green 3, zirconium, barium, and aluminum lake.

[0103] Examples of pearl pigments include titanium dioxide-coated mica, colored titanium dioxide-coated mica, bismuth oxychloride, and fish scale foil.

[0104] Examples of metal powder pigments include aluminum powder and copper powder.

[0105] <<Dye>> Examples of dyes include natural dyes such as chlorophyll and β-carotene. These may be used alone or in combination of two or more.

[0106] <<pH Adjusting Agent>> Examples of pH adjusting agents include potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate, lactic acid, citric acid, sodium citrate, glycolic acid, succinic acid, tartaric acid, malic acid, sodium hydrogen carbonate, and ammonium hydrogen carbonate. These may be used alone or in combination of two or more.

[0107] <<Surfactant Other than Component (C)>> Examples of surfactants include anionic surfactants, cationic surfactants, nonionic surfactants other than component (C), and amphoteric surfactants. These may be used individually or in combination of two or more.

[0108] Examples of anionic surfactants include soap bases, fatty acid soaps such as sodium laurate and sodium palmitate; higher alkyl sulfate salts such as sodium lauryl sulfate and potassium lauryl sulfate; alkyl ether sulfate salts such as polyoxyethylene (hereinafter sometimes abbreviated as "POE") lauryl sulfate triethanolamine and POE lauryl sulfate sodium; N-acyl sarcosinates such as sodium lauroyl sarcosinate; higher fatty acid amide sulfonic acids such as sodium N-myristoyl-N-methyl taurate and sodium coconut oil fatty acid methyl taulide; phosphate salts such as POE stearyl ether phosphate; monolauroyl monoethanolamide POE sulfosuccinate sodium, lauryl polypropylene Examples include sulfosuccinates such as sodium glycol sulfosuccinate; alkylbenzene sulfonates such as sodium linear dodecylbenzenesulfonate and linear dodecylbenzenesulfonate triethanolamine; N-acyl glutamates such as disodium N-stearoyl glutamate and monosodium N-stearoyl glutamate; higher fatty acid ester sulfates such as hydrogenated coconut oil fatty acid glycerin sulfate sodium; sulfurized oils such as belladonna oil; POE alkyl ether carboxylic acids; POE alkyl allyl ether carboxylic acid salts; higher fatty acid ester sulfonates; secondary alcohol sulfates; higher fatty acid alkylolamide sulfates; sodium lauroyl monoethanolamide succinate; and sodium caseinate.

[0109] Examples of cationic surfactants include alkyltrimethylammonium salts such as stearyltrimethylammonium chloride and lauryltrimethylammonium chloride; dialkyldimethylammonium salts such as distearyldimethylammonium chloride; alkylpyridinium salts such as cetylpyridinium chloride; alkylquaternary ammonium salts; alkyldimethylbenzylammonium salts; alkylisoquinolinium salts; dialkylmolionium salts; POE alkylamines; alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; and benzalkonium chloride.

[0110] Examples of nonionic surfactants include lipophilic nonionic surfactants other than component (C), and hydrophilic nonionic surfactants. Examples of lipophilic nonionic surfactants other than component (C) include sorbitan fatty acid esters such as sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, and sorbitan trioleate; glycerin polyglycerin fatty acids such as monocottonseed oil fatty acid glycerin, sesquioleic acid glycerin, and monostearate glyceryl malate; propylene glycol fatty acid esters such as monostearate propylene glycol; glycerin alkyl ethers; and POE-methylpolysiloxane copolymers. Examples of hydrophilic nonionic surfactants include POE sorbitan fatty acid esters such as POE sorbitan monooleate and POE sorbitan monostearate; POE sorbitan fatty acid esters such as POE sorbitan monolaurate, POE sorbitan monooleate, and POE sorbitan monostearate; POE glycerin fatty acid esters such as POE glycerin monooleate and POE glycerin distearate; POE fatty acid esters such as POE monooleate, POE distearate, and POE monodioleate; POE alkyl ethers such as POE lauryl ether, POE oleyl ether, and POE cholestanol ester; POE Examples include POE alkylphenyl ethers such as octylphenyl ether and POE nonylphenyl ether; POE-POP alkyl ethers such as POE-polyoxypropylene (hereinafter sometimes abbreviated as "POP") monobutyl ether, POE-POP cetyl ether, and POE-POP glycerin ether; POE beeswax-lanolin derivatives such as POE sorbitan beeswax; alkanolamides such as coconut oil fatty acid diethanolamide and fatty acid isopropanolamide; POE propylene glycol fatty acid esters; POE fatty acid amides, POE alkylamines; sucrose fatty acid esters, alkylethoxydimethylamine oxide, and the like.

[0111] Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants such as 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, and betaine-based surfactants such as amidebetaine and sulfobetaine.

[0112] <<Fragrance>> The fragrance may be a natural fragrance or a synthetic fragrance. These may be used individually or in combination of two or more.

[0113] Natural fragrances are fragrances whose main components are derived from plants or animals. Examples of natural fragrances include plant-derived natural fragrances such as rose oil, jasmine oil, neroli oil, lavender oil, ylang-ylang oil, tuberose oil, clary sage oil, clove oil, peppermint oil, geranium oil, patchouli oil, sandalwood oil, cinnamon oil, coriander oil, nutmeg oil, pepper oil, lemon oil, orange oil, bergamot oil, opoponax oil, vetiver oil, orris oil, and oakmoss oil; and animal-derived natural fragrances such as musk oil, civet oil, castoreum oil, and ambergris oil.

[0114] Synthetic fragrances can be classified into hydrocarbons, alcohols, aldehydes, ketones, esters, lactones, phenols, acetals, etc., based on their chemical structure or fragrance group. Specific examples of synthetic fragrances include hydrocarbons such as limonene and β-caryophyllene; alcohols such as cis-3-hexenol, linalool, farnesol, β-phenylethyl alcohol, geraniol, citronellol, terpineol, menthol, santalol, bagdanol, and bramanol; aldehydes such as 2,6-nonadienal, citral, α-hexyl cinnamic aldehyde, l-carbone, cyclopentadecanone, liral, and lilial; and β-ionone, damascone, methyl ionone. Examples include ketones such as ylone, isoesuper, acetylcedrene, and muscone; esters such as linalyl acetate, benzyl benzoate, benzyl acetate, methyl dihydroxyjasmonate, and methyljasmonate; lactones such as γ-undecalactone, jasmine lactone, cyclopentadecanol, and ethylene brassirate; phenols such as eugenol; acetals such as phenylacetaldehyde dimethyl acetal; and rose oxide, indole, and aurantiol.

[0115] <<(A) Drugs other than ingredient>> Examples of agents other than component (A) include vitamins, UV absorbers, chelating agents, preservatives, plant extracts, moisturizers, anti-inflammatory agents, whitening agents, cooling agents, amino acids, antioxidants, and disinfectants. These may be used individually or in combination of two or more.

[0116] -Vitamins- There are no particular restrictions on the type of vitamin used, but fat-soluble vitamins are preferred. Examples of fat-soluble vitamins include vitamin E, retinoids, and fat-soluble derivatives of ascorbic acid.

[0117] Examples of vitamin E include compounds consisting of tocopherol and its derivatives, and compounds consisting of tocotrienol and its derivatives.

[0118] Examples of retinoids include vitamin A compounds such as retinol, 3-hydroretinol, retinal, 3-hydroretinal, retinoic acid, 3-dehydroretinoic acid, and vitamin A acetate; carotenoids such as α,β,γ-carotene, β-cryptoxanthin, and echinenone; and provitamin A compounds such as xanthophyll.

[0119] Examples of oil-soluble derivatives of ascorbic acid include fatty acid esters of vitamin C such as L-ascorbyl stearate, L-ascorbyl tetraisopalmitate, L-ascorbyl palmitate, erythorbyl palmitate, erythorbyl tetraisopalmitate, and ascorbyl dioleate, as well as fatty acid esters of vitamin B6 such as pyridoxine dipalmitate, pyridoxine tripalmitate, pyridoxine dilaurate, and pyridoxine dioctanoate.

[0120] - UV absorber - Examples of UV absorbers include benzoic acid-based UV absorbers such as para-aminobenzoic acid; anthranilic acid-based UV absorbers such as methyl anthranilate; salicylic acid-based UV absorbers such as octyl salicylate; cinnamic acid-based UV absorbers such as isopropyl para-methoxycinnamate and octyl para-methoxycinnamate; UV absorbers such as urocanic acid and ethyl urocanate; benzophenone-based UV absorbers such as 2-hydroxy-4-methoxybenzophenone and dihydroxybenzophenone; benzotriazole-based UV absorbers; and 2-phenylbenzimidazole-5-sulfonic acid.

[0121] -Chelating agent- Examples of chelating agents include citramalic acid, agalic acid, glyceric acid, shikimic acid, hinokitiol, gallic acid, tannic acid, caffeic acid, ethylenediamine-N,N,N',N'-tetraacetic acid trisodium dihydrate (EDTA-2Na), ethylene glycol diaminetetraacetic acid, diethylenetriaminepentaacetic acid, phytic acid, polyphosphate, metaphosphate, their analogs, their alkali metal salts, and their carboxylic acid esters.

[0122] - Preservatives - Examples of preservatives include benzoic acid, salicylic acid, parahydroxybenzoic acid esters (methylparaben, ethylparaben, butylparaben, etc.), sorbic acid, parachlormethacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizer, and phenoxyethanol.

[0123] -Plant extract- Examples of plant extracts include Houttuynia cordata extract, Phellodendron amurense extract, Licorice extract, Peony extract, Paeonia suffruticosa extract, Luffa gourd extract, Saxifraga stolonifera extract, Eucalyptus extract, Clove extract, Horse chestnut extract, Cornflower extract, Seaweed extract, and Thyme extract.

[0124] -Moisturizer- Examples of humectants include polyethylene glycol (PEG), sodium chondroitin sulfate, sodium hyaluronate, sodium lactate, glucosamine, and cyclodextrin. Furthermore, the glycols, glycerin compounds, sugar alcohols, and sugars can also be used as humectants.

[0125] -Anti-inflammatory drugs- Examples of anti-inflammatory agents include azulene, glycyrrhizin, lysozyme chloride, pyridoxine hydrochloride, and sulfur.

[0126] -Whitening agent- Examples of skin whitening agents include arbutin, 4-methoxysalicylic acid, tranexamic acid, ethyl vitamin C, and magnesium ascorbate phosphate.

[0127] -Cooling agent- Examples of cooling agents include L-menthol and camphor.

[0128] In the cosmetic composition according to one embodiment, there are no particular restrictions on the content of other components, as long as they do not impair the effects of the cosmetic composition according to one embodiment, and they can be appropriately selected depending on the purpose.

[0129] -Antioxidant- Examples of antioxidants include ascorbic acid, α-tocopherol, and carotenoids.

[0130] In a cosmetic composition according to one embodiment, there are no particular restrictions on the content of other components, as long as they do not hinder the effects of the cosmetic composition, and they can be appropriately selected depending on the purpose.

[0131] <Dosage form> There are no particular restrictions on the dosage form of the cosmetic composition according to one embodiment, and it can be appropriately selected according to the purpose. Examples include aqueous cosmetics, gel-type cosmetics, and emulsified cosmetics.

[0132] There are no particular restrictions on the product form of the cosmetic composition according to one embodiment, and it can be appropriately selected according to the purpose. Examples include cosmetics for facial or body skincare or haircare such as lotions, emulsions, gels, serums, and creams; makeup cosmetics such as foundations and makeup bases; sunscreen cosmetics; suntan cosmetics; skin cleansing cosmetics such as makeup removers; and ointments. Furthermore, the product form of the cosmetic composition according to one embodiment may be in the form of impregnating a base material such as a pack. Among these, the product form of the cosmetic composition according to one embodiment is preferably a skincare cosmetic because it has excellent skin compatibility and firming properties.

[0133] <Manufacturing method> There are no particular limitations on the method for manufacturing the cosmetic composition according to one embodiment; it can be manufactured by known methods for manufacturing oil-in-water type cosmetics, but it can be preferably manufactured by the method for manufacturing the cosmetic composition according to one embodiment described later.

[0134] (Method of manufacturing cosmetics) A method for producing a cosmetic composition according to one embodiment includes the steps of: (A) dissolving a glycine derivative represented by formula (1) or a salt thereof in an aqueous solvent (hereinafter sometimes referred to as the "dissolution step"); and (B) a liquid oil that is liquid at 25°C containing at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters, and (C) a solid or semi-solid oil that is solid at 25°C containing at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax, and the (B) component and the (C) component The process includes: a step of liquefying the oil mixture at a temperature above the melting point of the component (B) and the component (C) while stirring the aqueous solvent; adding the liquefied oil mixture to the aqueous solvent at a temperature above the melting points of the component (B) and the component (C) (this may be referred to as the "oil mixture addition step"); and cooling the aqueous solvent to which the oil mixture has been added to a temperature of 25°C or lower to obtain a composition containing oily capsules (this may be referred to as the "oily capsule preparation step"); and further including other steps as necessary.

[0135] [ka] (In the formula, R 1 and R 2 Each of these independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, an arylcarbonyl group, or an aralkylcarbonyl group, and R 3 R represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, the R1 , the R 2 , and the R 3 (They cannot all become hydrogen atoms at the same time.)

[0136] <Dissolution process> The dissolution step is a step of dissolving the glycine derivative represented by formula (1) or a salt thereof in an aqueous solvent. The glycine derivative represented by formula (1) or a salt thereof (component (A)) and the aqueous solvent are as described in the (cosmetics) section above.

[0137] Since component (A) is soluble in aqueous solvents, there are no particular restrictions on the method of dissolving component (A) in aqueous solvents, and it can be done by ordinary mixing methods, for example, by using a mixer with stirring blades. Specific examples of mixers with stirring blades include propeller mixers and paddle mixers.

[0138] In the dissolution step, in addition to component (A), components soluble in the aqueous solvent described in <Other Components> of the (Cosmetic Composition) above may be dissolved in the aqueous solvent. The mixing of the other components into the aqueous solvent may be performed simultaneously with the mixing and dissolution of component (A), or separately.

[0139] <Oil mixture preparation process> The oil mixture preparation step involves liquefying a liquid oil that is liquid at 25°C and contains at least one selected from the group consisting of (B) silicone oil and polyhydric alcohol fatty acid esters, and a solid or semi-solid oil that is solid at 25°C and contains at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax, at a temperature exceeding the melting points of components (B) and (C) respectively, in order to obtain an oil mixture.

[0140] The liquid oil component (component (B)) which is liquid at 25°C and contains at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters, and the solid oil component (component (C)) which is solid or semi-solid at 25°C and contains at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax, are as described in the (cosmetics) section above.

[0141] The temperature exceeding the melting points of component (B) and component (C) refers to the temperature exceeding the respective melting points of component (B) and component (C). However, since component (B) is liquid at 25°C, it is sufficient to exceed the melting point of component (C).

[0142] There are no particular restrictions on the method of mixing components (B) and (C), and it can be done by a normal mixing method, for example, by mixing using a mixer having stirring blades. Specific examples of mixers having stirring blades include propeller mixers and paddle mixers.

[0143] The oil mixture may contain, in addition to components (B) and (C), the oily components described in <Other Components> of the (Cosmetic) above. In this case, in the oil mixture preparation step, the oily components described in <Other Components> of the (Cosmetic) above are added in addition to components (B) and (C).

[0144] In the oil mixture preparation step, component (B), component (C), and other oily components may be dissolved simultaneously, or one or more combinations of components may be dissolved separately and then mixed to form the oil mixture.

[0145] In the oil mixture preparation step, component (C) preferably acts as an amphiphilic substance, incorporating component (B) and, if necessary, other oily components to form micelles.

[0146] <Oil mixture addition process> The oil mixture addition step involves adding the oil mixture, which has been liquefied, to the aqueous solvent while stirring it at a temperature exceeding the melting points of components (B) and (C).

[0147] In the step of adding the oil mixture, there are no particular restrictions on the temperature of the aqueous solvent and the oil mixture, as long as the temperature exceeds the melting points of components (B) and (C), but it is preferable that the temperatures of the aqueous solvent and the oil mixture be substantially the same. In the method for producing a cosmetic composition according to one embodiment, "substantially the same temperature" means that the difference between the temperature of the aqueous solvent and the temperature of the oil mixture is preferably 10°C or less, preferably 5°C or less, more preferably 3°C or less, and even more preferably no temperature difference (i.e., a temperature difference of 0°C).

[0148] There are no particular restrictions on the stirring speed in the oil mixture addition step, and it can be appropriately selected depending on the purpose. However, 10 rpm to 1,500 rpm is preferred, and 20 rpm to 300 rpm is more preferred, as it facilitates the production of cosmetics containing oily capsules. Stirring can be carried out, for example, using a mixer with stirring blades. Specific examples of mixers with stirring blades include propeller mixers and paddle mixers.

[0149] There are no particular restrictions on the method of adding the oil mixture to the aqueous solvent, and it can be appropriately selected depending on the purpose. However, a method of adding the mixture at a constant rate using an injection means such as a liquid transfer pump is preferred because it facilitates the manufacture of cosmetics containing oily capsules. Furthermore, a method of directly injecting the oil mixture from the bottom of the aqueous solvent is preferred because it makes it less likely for the oil mixture to float and separate in the aqueous solvent, and it is possible to form oily capsules with a uniform particle size.

[0150] <Oil-based capsule preparation process> The oily capsule preparation step involves cooling the aqueous solvent to which the oil mixture has been added to a temperature of 25°C or lower to obtain a composition containing oily capsules.

[0151] The oil-based capsule preparation process is preferably carried out while stirring when cooling to a temperature of 25°C or lower. There are no particular restrictions on the stirring speed in the oil-based capsule preparation process, and it can be appropriately selected depending on the purpose, but it is preferable that the stirring speed and method be the same as in the oil mixture addition process.

[0152] Since component (C) in the oil mixture is solid or semi-solid at 25°C, it precipitates when cooled to a temperature below 25°C. In the oil mixture preparation process, micelles with component (B) and other oily components as the inner phase and component (C) as the outer phase are formed in the oily capsule preparation process as component (C) precipitates, resulting in oily capsules in which component (C) is solid or semi-solid. In this way, oily capsules are formed in the aqueous solvent.

[0153] <Other processes> Other processes are not particularly limited and can be selected as appropriate depending on the purpose. For example, a process of crystallizing component (C) can be used. Crystallizing the solid oil that forms the outer phase of the oily capsule results in a suitable hardness, creating a unique feel when used.

[0154] Furthermore, the method for manufacturing a cosmetic according to one embodiment may include other processing steps depending on the desired product form of the cosmetic. [Examples]

[0155] The embodiments will be described in more detail below with reference to examples and comparative examples, but the embodiments are not limited to these examples and comparative examples. In the examples and comparative examples, the content of each component shown in Table 1 is given as "mass %" relative to the total mass of the cosmetic, unless otherwise specified, and all values ​​are converted to pure content. Also, in Table 1, the mass ratio of the content of component (B) (mass %) to the total content of component (B) and component (C) (B+C) (mass %) [(B) / (B+C)] and the mass ratio of the content of component (C) (mass %) to the total content of component (B) and component (C) (B+C) (mass %) [(C) / (B+C)] were rounded to two decimal places by rounding to the third decimal place.

[0156] (Examples 1-3) The cosmetic compositions of Examples 1 to 3 were prepared by mixing each component according to the composition and amount (mass%) shown in Table 1.

[0157] Specifically, first, water-soluble components from component (A) and other components other than water were added to water to prepare an aqueous solvent. Next, components (B) and (C), as well as oily components from other components, were added and melted at 70°C to prepare an oily component mixture. Then, the aqueous solvent was heated to 70°C, and while stirring at 250 rpm using a propeller mixer, the oily component mixture was added to the aqueous solvent at a rate of 20 mL / min using a liquid transfer pump. At this time, the oily component mixture was injected from the bottom of the aqueous solvent. After the injection of the oily component mixture into the aqueous solvent was completed, the stirring speed was reduced to 150 rpm, and after cooling to room temperature (25°C ± 5°C), potassium hydroxide was added to obtain the cosmetics of Examples 1 to 3 (oil-in-water cosmetics) containing oily capsules.

[0158] (Comparative Example 1) In the preparation of the cosmetic compositions of Examples 1 to 3, the cosmetic composition of Comparative Example 1, which contains oily capsules, was obtained using the same method as the preparation of the cosmetic compositions of Examples 1 to 3, except that component (A) was not added, as shown in Table 1 for composition and content (mass%).

[0159] <Rating> The cosmetic formulations prepared in Examples 1-3 and Comparative Example 1 were evaluated for "skin compatibility" and "firming effect" using the following method. The evaluation results are shown in Table 1.

[0160] Microscopic observation of the average particle size of the oily capsules in each cosmetic composition of Examples 1-3 and Comparative Example 1 revealed that all were within the range of 200 μm to 500 μm.

[0161] <<Skin compatibility evaluation>> The skin compatibility of each cosmetic product in Examples 1-3 and Comparative Example 1 was evaluated using the following method. One expert evaluator applied each cosmetic product in Examples 1-3 and Comparative Example 1 to the skin and confirmed its skin compatibility, evaluating it based on the evaluation criteria below. The evaluation results are shown in Table 1. [Criteria for evaluating skin compatibility] A: It blended very well with my skin. B: It blended well with the skin. C: It blended into the skin fairly well. D: It did not blend well with the skin.

[0162] <<Evaluation of firmness and tightening effect>> The firming and tightening sensation of each cosmetic product in Examples 1-3 and Comparative Example 1 when applied to the skin was evaluated using the following method. One expert evaluator confirmed the firming and tightening sensation of each cosmetic product in Examples 1-3 and Comparative Example 1 when applied to the skin, and evaluated them based on the evaluation criteria below. The evaluation results are shown in Table 1. [Evaluation criteria for firmness and tightening sensation after application] A: The firming and tightening effect was very good. B: The firming and tightening effect was good. C: The firming and tightening effect was slightly good. D: The firming and tightening effect was poor.

[0163] [Table 1]

[0164] Examples of the types of disclosures include the following: <1> (A) A glycine derivative represented by formula (1) or a salt thereof,

[0165] [ka] (In the formula, R 1 and R 2Each of these independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, an arylcarbonyl group, or an aralkylcarbonyl group, and R 3 R represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, the R 1 , the R 2 , and the R 3 (They cannot all become hydrogen atoms at the same time.) (B) A liquid oil that is liquid at 25°C, containing at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters, (C) A solid or semi-solid oil at 25°C containing at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols with 18 or more carbon atoms, and candelilla wax, It is a cosmetic product containing [a specific ingredient]. <2> The above (A) component is glycylglycine or a salt thereof. <1> It is a cosmetic product as described above. <3> The content of component (A) is 0.1% by mass to 5% by mass, <1> or <2> It is a cosmetic product as described above. <4> The oily capsule containing the above-mentioned component (B) and component (C) has an average particle size of 100 μm or more, <1> from <3> It is a cosmetic product as described in any of the following. <5> (A) A step of dissolving a glycine derivative represented by formula (1) or a salt thereof in an aqueous solvent,

[0166] [ka] (In the formula, R 1 and R 2 Each of these independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, an arylcarbonyl group, or an aralkylcarbonyl group, and R 3R represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, the R 1 , the R 2 , and the R 3 (They cannot all become hydrogen atoms at the same time.) A step of obtaining an oil mixture by liquefying a liquid oil that is liquid at 25°C and containing at least one selected from the group consisting of (B) silicone oil and polyhydric alcohol fatty acid esters, and a solid or semi-solid oil that is solid at 25°C and containing at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax at a temperature exceeding the melting points of components (B) and (C), The steps include adding the oil mixture, which has been liquefied by stirring the aqueous solvent at a temperature exceeding the melting points of components (B) and (C), to the aqueous solvent, The steps include: cooling the aqueous solvent to which the oil mixture has been added to a temperature of 25°C or lower to obtain a composition containing oily capsules; This is a method for producing cosmetics characterized by containing [a specific ingredient].

[0167] As described above, this disclosure has been explained based on specific embodiments and examples, but these embodiments and examples are merely presented as examples, and this disclosure is not limited to the above embodiments and examples. The above embodiments can be implemented in various other forms, and various combinations, omissions, substitutions, additions, modifications, etc., are possible without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents.

Claims

1. (A) A glycine derivative represented by formula (1) or a salt thereof, 【Chemistry 1】 (In the formula, R １ and R ２ Each of these independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, an arylcarbonyl group, or an aralkylcarbonyl group, R ３ R represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, the R １ , the R ２ , and the R ３ (They cannot all become hydrogen atoms at the same time.) (B) A liquid oil that is liquid at 25°C, containing at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters, (C) A solid or semi-solid oil at 25°C containing at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax, Cosmetics containing [a specific ingredient].

2. The cosmetic composition according to claim 1, wherein component (A) is glycylglycine or a salt thereof.

3. The cosmetic composition according to claim 1 or 2, wherein the content of component (A) is 0.1% by mass to 5% by mass.

4. The cosmetic composition according to claim 1 or 2, comprising oily capsules with an average particle size of 100 μm or more, containing the aforementioned component (B) and the aforementioned component (C).

5. (A) A step of dissolving a glycine derivative represented by formula (1) or a salt thereof in an aqueous solvent, 【Chemistry 2】 (wherein, R １ and R ２ each independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an aralkyl group, an aminomethylcarbonyl group, an amidino group, an alkylcarbonyl group, an alkenylcarbonyl group, an arylcarbonyl group, or an aralkylcarbonyl group, and R ３ represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. However, the R １ , the R ２ , and the R ３ will not all become hydrogen atoms simultaneously.) A step of obtaining an oil mixture by liquefying (B) a liquid oil that is liquid at 25°C and contains at least one selected from the group consisting of silicone oil and polyhydric alcohol fatty acid esters, and (C) a solid or semi-solid oil that is solid at 25°C and contains at least one selected from the group consisting of glyceryl monoalkyl ether, higher alcohols having 18 or more carbon atoms, and candelilla wax at a temperature exceeding the melting points of components (B) and (C), The steps include adding the oil mixture, which has been liquefied while stirring the aqueous solvent at a temperature exceeding the melting points of components (B) and (C), to the aqueous solvent, The step of cooling the aqueous solvent to which the oil mixture has been added to a temperature of 25°C or lower to obtain a composition containing oily capsules, A method for producing a cosmetic product characterized by containing [the specified ingredient].

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