WO2024128024A1 - 水中油型乳化化粧料 - Google Patents
水中油型乳化化粧料 Download PDFInfo
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- WO2024128024A1 WO2024128024A1 PCT/JP2023/043055 JP2023043055W WO2024128024A1 WO 2024128024 A1 WO2024128024 A1 WO 2024128024A1 JP 2023043055 W JP2023043055 W JP 2023043055W WO 2024128024 A1 WO2024128024 A1 WO 2024128024A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/04—Dispersions; Emulsions
- A61K8/06—Emulsions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/20—Halogens; Compounds thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/24—Phosphorous; Compounds thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/25—Silicon; Compounds thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/29—Titanium; Compounds thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
- A61K8/41—Amines
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
- A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
- A61Q1/02—Preparations containing skin colorants, e.g. pigments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
Definitions
- the present invention relates to an oil-in-water emulsion cosmetic. More specifically, it relates to an oil-in-water emulsion cosmetic that contains a stable blend of multi-layered capsules containing a pigment, and that can change color tone by crushing the multi-layered capsules with an appropriate force to expose the pigment contained in the capsules.
- Patent Document 1 describes a water-in-oil emulsion sunscreen product that contains a multi-layer capsule containing a pigment and an ultraviolet scattering agent such as titanium oxide or zinc oxide (hereinafter, simply referred to as a "multi-layer capsule"). Even if this sunscreen product contains a relatively large amount of an ultraviolet scattering agent, excessive whiteness is suppressed by the color tone change caused by the multi-layer capsule.
- the oil-based cosmetic described in Patent Document 2 is formulated with multi-layered capsules and a water-soluble scrubbing agent of a specific particle size, and can cause a color change by rubbing the cosmetic film at any desired time, not just when the cosmetic is applied.
- conventional cosmetics containing multi-layered capsules are oil-based or water-in-oil emulsion cosmetics, and the multi-layered capsules are incorporated into the oil phase. This is because it is difficult to incorporate the multi-layered capsules into the oil phase of oil-in-water emulsion cosmetics due to the surface properties and particle size of the capsules.
- Patent Document 3 discloses an oil-in-water emulsion cosmetic in which a nonionic surfactant, a polyhydric alcohol, and pigment-grade hydrophobically treated particles with an average particle size of 300 nm or more are incorporated into the dispersion medium (aqueous phase), and it is said that the hydrophobically treated particles can be applied uniformly to the skin surface to achieve a good tone-up effect, etc.
- Patent No. 6434993 WO2021/020351 WO2021/132273
- an object of the present invention is to provide an oil-in-water emulsion cosmetic that contains multi-layered capsules, and in which the incorporated multi-layered capsules can be broken by application of a moderate force to expose the encapsulated pigment.
- the inventors discovered that the above problems could be solved by blending multi-layered capsules and a polyhydric alcohol in the aqueous phase (external phase) of an oil-in-water emulsion cosmetic, and further blending a salt having a specific molecular weight, while adjusting the blending ratio of the multi-layered capsules to the salt, thereby completing the present invention.
- the present invention provides: (A) a multi-layer capsule containing a pigment; (B) a salt having a molecular weight of 1000 or less; and (C) a polyhydric alcohol,
- An oil-in-water emulsion cosmetic comprising:
- the present invention provides an oil-in-water emulsion cosmetic, characterized in that the blending ratio [(B)/(A)] of the salt (B) having a molecular weight of 1,000 or less to the multi-layered capsule containing the pigment (A) is 0.003 or more.
- the oil-in-water emulsion cosmetic of the present invention can stably contain multi-layer capsules containing a pigment, and when rubbed with a moderate amount of force, the multi-layer capsules can be broken to expose the encapsulated pigment. Therefore, the cosmetic of the present invention can provide both the fresh usability of an oil-in-water emulsion cosmetic and the realization of a color change due to the multi-layer capsules.
- the oil-in-water emulsion cosmetic of the present invention (hereinafter simply referred to as "cosmetic") contains (A) a multi-layered capsule containing a pigment, (B) a salt with a molecular weight of 1000 or less, and (C) a polyhydric alcohol as essential ingredients.
- a multi-layered capsule containing a pigment (hereinafter also simply referred to as “multi-layered capsule” or “A component”) has a structure having an internal layer (core) and one or more external layers (shells).
- a colored pigment such as a red inorganic pigment or a yellow inorganic pigment is encapsulated in the internal layer, and a first external layer having a polymer as a base material covers the internal layer.
- the first external layer having a polymer as a base material may be further covered by a second external layer made of a different material.
- first external layer having a polymer as a base material and the second external layer made of a different material are covered is arbitrary, and each may be a single layer or multiple layers.
- the internal layer, the first external layer, and the second external layer may optionally contain other inorganic powders (including pigments).
- the polymer that serves as the base material for the first and/or second outer layer is not particularly limited as long as it is one that is commonly used in cosmetics, but examples include organic polymers such as (meth)acrylic resins such as polymethyl methacrylate, nylon, polyester, polyethylene, polystyrene, polyurethane, silicone resin, and cellulose.
- organic polymers such as (meth)acrylic resins such as polymethyl methacrylate, nylon, polyester, polyethylene, polystyrene, polyurethane, silicone resin, and cellulose.
- the "multilayer capsule” of the present invention may be a commercially available product, such as MAGICOLOR (registered trademark) sold by Biogenics, Inc., Sugarcapsule Magic SP Series sold by Daito Kasei Kogyo Co., Ltd., TagraCap (trademark) sold by Tagra Biotechnologies Ltd., and MicroBeads (trademark) sold by Salvona Technologies LLC.
- MAGICOLOR registered trademark
- Biogenics, Inc. Sugarcapsule Magic SP Series sold by Daito Kasei Kogyo Co., Ltd.
- TagraCap trademark
- Tagra Biotechnologies Ltd. and MicroBeads (trademark) sold by Salvona Technologies LLC.
- a typical multi-layered capsule can be produced, for example, as described in U.S. Patent Application Publication No. 2011/0165208 (or the corresponding Japanese Patent Publication No. 2011-529104), by preparing a solution of a first pigment, a plasticizer, and a polymer; spray drying the solution to form core particles in which the pigment is coated with the polymer; dispersing these core particles in a solution containing a second pigment; and spray drying the dispersion to form capsule particles in which the second pigment is coated with the polymer.
- the diameter of the multi-layered capsule is preferably less than 300 ⁇ m, and is preferably 280 ⁇ m or less, more preferably 250 ⁇ m or less, even more preferably 150 ⁇ m or less, even more preferably 100 ⁇ m or less, and most preferably 60 ⁇ m or less.
- the diameter refers to the number average diameter.
- the amount of the multi-layered capsules is not particularly limited as long as the intended visual effect can be achieved when applied to the skin.
- the amount is preferably 0.1 to 3% by mass relative to the total amount of the cosmetic, more preferably 0.3 to 2.5% by mass, even more preferably 0.5 to 2% by mass, and most preferably 0.8 to 1.8% by mass.
- a multi-layered capsule amount of 0.1% by mass or more can provide sufficient color change and skin color correction effects, while a multi-layered capsule amount of 3% by mass or less can provide a natural finish that is attractive to the user.
- the color of the pigment contained in the multi-layered capsules incorporated in the cosmetic of the present invention can be appropriately selected according to the intended use of the cosmetic, and is not particularly limited.
- the multi-layered capsules may be incorporated in one type or in a combination of two or more types.
- a multi-layered capsule containing a red pigment and a multi-layered capsule containing a yellow pigment may be incorporated in combination, and the blending ratio thereof may be set as desired.
- the (B) salt with a molecular weight of 1000 or less (hereinafter simply referred to as "salt” or “component B") blended in the cosmetic of the present invention is a compound in which one or more dissociable hydrogen ions contained in an acid are substituted with a positive ion (cation) such as a metal ion or ammonium ion, and has a molecular weight of 1000 or less. If the molecular weight of the "salt” (component B) exceeds 1000, the effect intended by the present invention (the effect of making multi-layered capsules more easily breakable; hereinafter also referred to as "capsule easy breaking effect”) cannot be obtained.
- an “acid” that forms a “salt” can be defined as a substance that has hydrogen in its molecule and dissociates into a hydrogen ion and an anion when dissolved in water (same meaning as "Arrhenius acid”).
- the “acid” in the present invention is not particularly limited as long as it has a molecular weight of 1000 or less, and may be a monobasic acid or a polybasic acid of dibasic acid or more. Examples include inorganic acids such as hydrochloric acid and metaphosphoric acid, and organic acids such as ethylenediaminetetraacetic acid (EDTA) and phenylbenzimidazole sulfonic acid.
- agents with whitening properties include ascorbic acid (L-ascorbic acid), tranexamic acid, glycyrrhizic acid, nicotinic acid, kojic acid, ellagic acid, 1-piperidinepropionic acid, 3-O-ethyl-L-ascorbic acid, and alkoxysalicylic acids (e.g., 4-methoxysalicylic acid).
- Substances (bases) that neutralize “acids” to form “salts,” including those exemplified above, include alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; zinc; iron; ammonium; basic amino acids such as arginine, lysine, histidine, and ornithine; and amines such as monoethanolamine, diethanolamine, triethanolamine, and 2-amino-2-methyl-1,3-propanediol (AMPD).
- alkali metals such as sodium and potassium
- alkaline earth metals such as calcium and magnesium
- zinc iron
- ammonium basic amino acids
- basic amino acids such as arginine, lysine, histidine, and ornithine
- amines such as monoethanolamine, diethanolamine, triethanolamine, and 2-amino-2-methyl-1,3-propanediol (AMPD).
- AMPD 2-amino-2-methyl-1,3-propan
- the amount of "salt” (component B) in the cosmetic of the present invention is not particularly limited as long as it is an amount that can obtain the intended effect (capsule destruction effect). Usually, it is preferably 0.01 to 3 mass % relative to the total amount of the cosmetic, more preferably 0.05 to 2.5 mass %, and even more preferably 0.1 to 2 mass %. However, even within the above-mentioned preferred range of blending amounts, it is necessary that the ratio (mass ratio: B/A) of the blending amount of "salt" (component B) to the blending amount of "multi-layered capsule (component A)" is 0.003 or more.
- This ratio (B/A) can be, for example, 0.01 or more, 0.3 or more, 0.6 or more, 1.0 or more, etc. However, if this ratio (B/A) is less than 0.003, the capsule easy breaking effect cannot be obtained.
- the upper limit of the blending amount ratio (B/A) is not particularly limited, but is usually 10 or less, preferably 5 or less.
- component C Polyhydric Alcohol
- component C a polyhydric alcohol
- the cosmetic preparation of the present invention can stably disperse the "multilayered capsules" (component A) in the aqueous phase (external phase).
- polyhydric alcohol used in the present invention is not particularly limited as long as it is a polyhydric alcohol that can be incorporated into cosmetics.
- polyhydric alcohols that are preferably used include dihydric alcohols (ethylene glycol, propylene glycol, 1,3-butylene glycol (BG), propanediol, etc.); trihydric alcohols (glycerin, etc.); tetrahydric alcohols (pentaerythritol such as 1,2,6-hexanetriol, etc.); pentahydric alcohols (xylitol, etc.); polyhydric alcohol polymers (diglycerin, dipropylene glycol, triethylene glycol, polyethylene glycol, etc.); sugar alcohols (sorbitol, mannitol, etc.), etc.
- the amount of polyhydric alcohol (ingredient C) in the cosmetic of the present invention is not particularly limited, but is usually preferably 1 to 25% by mass, more preferably 3 to 20% by mass, and even more preferably 5 to 15% by mass, based on the total amount of the cosmetic. If the amount of polyhydric alcohol is less than 1% by mass, it is difficult to stably disperse the multi-layered capsules, and if it is more than 25% by mass, the cosmetic may feel sticky when used.
- the cosmetic of the present invention is an oil-in-water emulsion cosmetic in which a water-containing dispersion medium (aqueous phase) is used as the external phase (continuous phase) in which oil droplets (oil phase or internal phase) are dispersed.
- aqueous phase water-containing dispersion medium
- continuous phase oil droplets
- oil phase or internal phase oil droplets
- Component D Silicone-Based Nonionic Surfactant
- a silicone-based nonionic surfactant hereinafter also referred to as "Component D”
- a silicone surfactant is a surfactant having a siloxane structure in the molecule.
- a nonionic surfactant having an HLB of 14 to 16 is preferable.
- HLB hydrophilic-lipophilic balance
- HLB value is one of the indices that express the degree of affinity of a molecule (surfactant) having a hydrophilic group and a lipophilic group to water and oil.
- silicone-based nonionic surfactant it is preferable to use polyether-modified silicone.
- specific examples include PEG-3 dimethicone, PEG-7 dimethicone, PEG-9 dimethicone, PEG-10 dimethicone, PEG-12 dimethicone, PEG-9 methyl ether dimethicone, PEG-10 methyl ether dimethicone, PEG-11 methyl ether dimethicone, PEG-32 methyl ether dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, etc.
- the amount of silicone-based nonionic surfactant (component D) in the cosmetic of the present invention is not particularly limited, but is usually preferably 0.05 to 3 mass% of the total amount of the cosmetic, more preferably 0.15 to 2.5 mass%, and even more preferably 0.25 to 2 mass%.
- component E amphiphilic Substance
- amphiphilic substances include lower alcohols and their derivatives, and non-silicone nonionic surfactants with an HLB of 8 to 15.
- Lower alcohols include alcohols having 3 or less carbon atoms, such as methanol, ethanol, and propanol, and lower alcohol derivatives include, for example, phenoxyethanol and lower alcohols substituted with an alkoxy group having 3 or less carbon atoms. Among these, ethanol and phenoxyethanol are preferred.
- non-silicone non-ionic surfactants with an HLB value of 8 to 15, so long as they do not have a siloxane structure in the molecule and have an HLB value of 8 to 15.
- examples include polyoxyalkylene alkyl ethers, polyalkylene glycol fatty acid esters, POE hydrogenated castor oil derivatives, POE alkyl ethers, PEG/PPG alkyl ethers, PEG fatty acid esters, polyglycerin fatty acid esters, POE glycerin fatty acid esters, PEG glyceryl isostearate, etc.
- polyoxyalkylene alkyl ether examples include polyoxyethylene behenyl ether and polyoxyethylene stearyl ether.
- polyalkylene glycol fatty acid esters examples include polyethylene glycol monostearate, polyethylene glycol monooleate, and the like.
- POE hydrogenated castor oil derivatives include, for example, POE (20-100) hydrogenated castor oil derivatives. Specific examples include POE (20) hydrogenated castor oil derivatives, POE (40) hydrogenated castor oil derivatives, POE (60) hydrogenated castor oil derivatives, and POE (100) hydrogenated castor oil derivatives.
- POE alkyl ethers examples include POE(2) lauryl ether, POE(4.2) lauryl ether, POE(9) lauryl ether, POE(5.5) cetyl ether, POE(7) cetyl ether, POE(10) cetyl ether, POE(15) cetyl ether, POE(20) cetyl ether, POE(23) cetyl ether, POE(4) stearyl ether, POE(20) stearyl ether, POE(7) oleyl ether, POE(10) oleyl ether, and POE(15) oleyl ether.
- PEG (polyethylene glycol)/PPG (polypropylene glycol) alkyl ethers examples include PEG/PPG-17/7 diethyl ether, PEG/PPG-1/4 cetyl ether, PEG/PPG-10/4 cetyl ether, PEG/PPG-20/8 cetyl ether, PEG/PPG-20/6 decyltetradecyl ether, and PEG/PPG-30/6 decyltetradecyl ether.
- PEG fatty acid esters include polyethylene glycol monolaurate (hereinafter abbreviated as PEG) (10), PEG monostearate (10), PEG monostearate (25), PEG monostearate (40), PEG monostearate (45), PEG monostearate (55), PEG monostearate (100), PEG monooleate (10), PEG distearate, and PEG diisostearate.
- PEG polyethylene glycol monolaurate
- polyglycerol fatty acid esters examples include hexaglyceryl monolaurate, hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, decaglyceryl monooleate, decaglyceryl distearate, and decaglyceryl diisostearate.
- POE glycerin fatty acid esters examples include polyoxyethylene (POE) (5) glyceryl monostearate, POE (15) glyceryl monostearate, POE (5) glyceryl monooleate, and POE (15) glyceryl monooleate.
- PEG glyceryl isostearate examples include PEG (8) glyceryl isostearate, PEG (10) glyceryl isostearate, PEG (15) glyceryl isostearate, PEG (20) glyceryl isostearate, PEG (25) glyceryl isostearate, PEG glyceryl (30) isostearate, PEG (40) glyceryl isostearate, PEG (50) glyceryl isostearate, and PEG (60) glyceryl isostearate.
- PEG glyceryl isostearate examples include PEG (8) glyceryl isostearate, PEG (10) glyceryl isostearate, PEG (15) glyceryl isostearate, PEG (20) glyceryl isostearate, PEG (25) glyceryl isostearate, PEG glyceryl (30) isostearate, PEG (40) glyceryl isost
- the amount of amphiphilic substance (component E) in the cosmetic of the present invention is not particularly limited, but is usually preferably 0.5 to 10% by mass, more preferably 1 to 8% by mass, and even more preferably 2 to 7% by mass, based on the total amount of the cosmetic.
- aqueous phase external phase
- optional components that may be blended into the aqueous phase (external phase) of the cosmetic of the present invention include, but are not limited to, aqueous phase thickeners, buffers, chelating agents, water-soluble drugs (excluding those that fall under (Component E)), water-soluble UV absorbers, etc.
- the emulsion stability can be further improved by blending an aqueous phase thickener into the aqueous phase (external phase) of the cosmetic of the present invention.
- aqueous phase thickener examples include, but are not limited to, polysaccharide-based thickeners such as xanthan gum and cellulose derivatives, acrylamide-based thickeners such as (dimethylacrylamide/sodium acryloyldimethyltaurate) crosspolymers, and associative thickeners such as hydrophobically modified polyether urethane.
- salt component B
- carboxyvinyl polymers for example, less than 0.1% by mass
- the oil that constitutes the oil phase (internal phase) of the cosmetic of the present invention is not particularly limited as long as it can be incorporated into the cosmetic, and examples of the oil include liquid oils and fats, solid oils and fats, waxes, hydrocarbon oils, silicone oils, polar oils, higher alcohols, higher fatty acids, etc.
- Liquid fats and oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, triglycerin, etc.
- Solid fats and oils include cacao butter, coconut oil, horse oil, hardened coconut oil, palm oil, beef tallow, mutton tallow, hardened beef tallow, palm kernel oil, lard, beef bone fat, Japan Rice Kernel Oil, hardened oil, beef foot fat, Japan Rice, and hardened castor oil.
- Waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ivory wax, whale wax, montan wax, rice bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, etc.
- Hydrocarbon oils include non-volatile hydrocarbon oils such as liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and olefin oligomers; and volatile hydrocarbon oils such as heptane, isododecane, isohexadecane, and isodecane.
- Volatile refers to the property of having a volatile content of more than 5% when left at 105°C for 3 hours under atmospheric pressure.
- silicone oils examples include linear silicone oils such as dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane (diphenylsiloxyphenyltrimethicone), and methylhydrogenpolysiloxane with a viscosity of 6 cSt or more; low molecular weight linear or branched dimethylpolysiloxanes such as dimethylpolysiloxane (dimethicone) with a viscosity of 2 cSt or less, and volatile silicone oils including cyclic silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane.
- linear silicone oils such as dimethylpolysiloxane (dimethicone), methylphenylpolysiloxane (diphenylsiloxyphenyltrimethicone), and methylhydrogenpolysilox
- polar oils include ester oils and oil-based UV absorbers.
- oils with an IOB value of more than 0.10 are preferred.
- an "organic value” of 20 for one carbon atom in a molecule and an “inorganic value” of 100 for one hydroxyl group are set according to the various atoms or functional groups, and the IOB value of an organic compound can be calculated by accumulating the "inorganic value” and “organic value” of all atoms and functional groups in the organic compound (see, for example, Koda Yoshio, "Organic Conceptual Diagram - Basics and Applications -", pp. 11-17, Sankyo Publishing, 1984).
- ester oils include isopropyl myristate, octyl palmitate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, isononyl isononanoate, isotridecyl isononanoate, cetyl ethylhexanoate, pentaerythrityl tetraethylhexanoate, diethylhexyl succinate, dioctyl succinate, glycol distearate, glyceryl diisostearate, neopentyl glycol dicaprate, and diisostearyl malate.
- organic UV absorbers such as ethylhexyl methoxycinnamate, octocrylene, polysilicone-15, t-butyl methoxydibenzoylmethane, ethylhexyl triazone, bisethylhexyloxyphenol meth
- the amount of oil in the cosmetic of the present invention is not particularly limited as long as it is within a range that allows a stable oil-in-water emulsion cosmetic to be obtained. It is usually 5 to 40% by mass, preferably 10 to 35% by mass, and more preferably 20 to 30% by mass, based on the total amount of the cosmetic.
- the oil blended in the cosmetic of the present invention contains a volatile oil (volatile hydrocarbon oil and/or volatile silicone oil), the uniform dispersion of powder components and (non-volatile) oil in the cosmetic film remaining after the volatile oil evaporates tends to be maintained. Therefore, it is preferable for the oil to contain a volatile oil. For example, it is preferable to include 10 mass% or more of a volatile oil of the total amount of oil.
- preservatives ethylparaben, butylparaben, etc.
- antioxidants dibutylhydroxytoluene (BHT), butylhydroxyanisole (BHA), etc.
- powder components e.g., inorganic powders (e.g
- the cosmetic of the present invention can be produced in accordance with a method commonly used for oil-in-water emulsion cosmetics.
- the components constituting the aqueous phase (external phase) are mixed and stirred while being heated as necessary
- the components constituting the oil phase (internal phase) are separately mixed and stirred while being heated as necessary
- the oil phase is mixed and emulsified into the aqueous phase while being stirred.
- the cosmetic of the present invention has the fresh feel that oil-in-water emulsion cosmetics inherently have, but contains multi-layer capsules containing pigments, and when the multi-layer capsules are broken by moderate rubbing, the encapsulated pigments are exposed and the color tone changes. Therefore, in addition to being able to be provided as a skin care cosmetic with a concealing effect due to the color tone change, it is also useful as a makeup cosmetic in which the color tone change can be enjoyed.
- Oil-in-water emulsion cosmetics were prepared according to the formulations shown in Tables 1 to 3 below. Specifically, for each example cosmetic shown in Table 1, ingredients No. 1 to 4 were mixed to make mixture (1), ingredients No. 5 to 9 were mixed to make mixture (2), and mixtures (1) and (2) were mixed to make mixture (3). Next, ingredients No. 10 to 13 were mixed to make mixture (4), and mixture (4) was mixed with mixture (3) to obtain an aqueous phase mixture. Furthermore, ingredients No. 14 to 24 were mixed to obtain an oil phase mixture, and the oil phase mixture was added to the aqueous phase mixture for emulsification to obtain an oil-in-water emulsion cosmetic. The cosmetics in Tables 2 and 3 were also prepared in a similar manner.
- the properties of the cosmetics in each of the examples in Tables 1 to 3 were measured and evaluated by the following methods. ⁇ "Coating test" A predetermined amount of the oil-in-water emulsion cosmetic prepared for each example was applied onto a plate, and the formed cosmetic film was rubbed with the same force. The number of rubs until the color of the cosmetic film changed (the number of rubs until the multi-layer capsules were crushed and the encapsulated pigment was exposed) was measured by visual observation by a specialist panel.
- Example 1 The results shown in Table 1 confirm that the oil-in-water emulsion cosmetic of the present invention (Examples 1 to 4), which contains (A) multi-layer capsules containing a pigment; (B) a salt with a molecular weight of 1000 or less; and (C) a polyhydric alcohol, and has a blending ratio [(B)/(A)] of 0.003 or more, breaks (crushes) the multi-layer capsules and causes a color change with a number of rubs that is not burdensome to the user.
- Example 3 which used sodium chloride (table salt) as "(B) salt”, required a slightly higher number of rubs than Examples 1 and 2, which used other salts.
- Example 4 used the same amount of sodium chloride as Example 3, but by further adding (D) an amphiphilic substance (PEG/PPG-14/7 dimethyl ether), the number of rubs was equivalent to Examples 1 and 2.
- Table 2 shows that the same effect can be obtained even if the type of "(B) salt” or the mixing ratio [(B)/(A)] is changed, as long as the condition [(B)/(A)] is 0.003 or more is met.
- Example 9 in Table 3 shows that the same effect can be obtained even if the amphiphilic substance (PEG/PPG-14/7 dimethyl ether) (E) used in Example 4 is replaced with another substance (phenoxyethanol).
- Comparative Examples 1 to 3 which have the same composition as Example 9 except for (Component B)
- Comparative Example 1 in which the blending ratio [(B)/(A)] is less than 0.003, shows that the multi-layered capsules are difficult to crush, and a color change was observed only after 7 or more strokes.
- Comparative Example 2 which does not contain (Component B)
- Comparative Example 3 which contains a salt with a molecular weight exceeding 1000 (sodium hyaluronate (molecular weight 2000 or more))
- 10 or more strokes were required for the multi-layered capsules to crush.
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Abstract
Description
特許文献2に記載された油性化粧料は、多層型カプセルと特定粒子径の水溶性スクラブ剤を配合し、化粧料の塗布時に限らず、所望のタイミングで化粧膜を塗擦することにより色調変化を生じさせることができる。
本発明は、上述した技術の現状に鑑みて、多層型カプセルを含有する水中油型乳化化粧料であって、なおかつ配合した多層型カプセルが適度な力で壊れて内包された顔料を露出させることができる化粧料を提供することを課題とする。
(A)顔料を含む多層型カプセル;
(B)分子量1000以下の塩;及び、
(C)多価アルコール、
を含む水中油型乳化化粧料であって、
前記(A)顔料を含む多層型カプセルに対する、前記(B)分子量1000以下の塩の配合量比率[(B)/(A)]が、0.003以上であることを特徴とする、水中油型乳化化粧料を提供する。
顔料を含む多層型カプセル(以下、単に「多層型カプセル」または「A成分」ともいう)は、内部層(コア)と1又は複数の外部層(シェル)とを具備する構造を有する。内部層には、赤色無機顔料、黄色無機顔料等の着色顔料が内包され、ポリマーを母材とした第1の外部層が内部層を被覆している。ポリマーを母材とした第1の外部層はさらに別の材料からなる第2の外部層によって被覆されてもよい。ポリマーを母材とした第1の外部層と別の材料からなる第2の外部層を被覆する順序は任意であり、各々が単層であっても複数層であってもよい。内部層、第1及び第2の外部層には任意で他の無機粉末(顔料を含む)が含まれ得る。
本発明の化粧料に配合される(B)分子量1000以下の塩(以下、単に「塩」または「B成分」ともいう)は、酸に含まれる1以上の解離しうる水素イオンを金属イオンやアンモニウムイオン等の陽イオン(カチオン)で置換した化合物であって、その分子量が1000以下のものである。「塩」(B成分)の分子量が1000を超えると、本発明で意図する効果(多層型カプセルを壊れ易くする効果;以下、「カプセル易破壊効果」ともいう)が得られない。
但し、上記の好ましい配合量範囲内であっても、「塩」(B成分)の配合量の「多層型カプセル(A成分)の配合量に対する比率(質量比:B/A)を、0.003以上とすることが必要である。この比率(B/A)は、例えば、0.01以上、0.3以上、0.6以上、1.0以上等とすることができる。しかし、この比率(B/A)が0.003未満であると、カプセル易破壊効果が得られない。配合量の比率(B/A)の上限値は特に限定されないが、通常は10以下、好ましくは5以下である。
本発明の化粧料は、(C)多価アルコール(以下、「C成分」ともいう)を含有することにより、「多層型カプセル」(A成分)を水相(外相)に安定に分散させることができる。
本発明の化粧料には、水中油型乳化化粧料に配合可能な他の任意成分を、本発明の効果を阻害しない範囲で配合することができる。
本発明の化粧料の水相(外相)に、シリコーン系の非イオン性界面活性剤(以下、「D成分」ともいう)を配合することにより、乳化安定性及び多層型カプセル(A成分)の分散安定性を更に向上させることができる。
シリコーン系の界面活性剤とは、分子内にシロキサン構造を有する界面活性剤である。本発明のD成分としては、HLBが14~16の非イオン性界面活性剤が好ましい。なお、「HLB」は、「Hydrophilic-Lipophilic Balance」の略であり、HLB値は、親水基と親油基とを持つ分子(界面活性剤)の水及び油への親和性の程度を表す指標の一つである。HLB値は、例えば、以下の数式に基づいて算出することができる。
HLB=7+11.7・log(MW/MO)
(ただし、MWは親水基部の分子量を表し、MOは親油基部の分子量を表す。)
本発明の化粧料の水相(外相)に、両親媒性物質(以下、「E成分」ともいう)を配合することにより、乳化安定性及び多層型カプセル(A成分)の分散安定性を更に向上させることができる。
ポリアルキレングリコール脂肪酸エステルとしては、例えば、モノステアリン酸ポリエチレングリコール、モノオレイン酸ポリエチレングリコール等を挙げることができる。
ポリグリセリン脂肪酸エステルとしては、例えば、モノラウリン酸ヘキサグリセリル、モノミリスチン酸ヘキサグリセリル、モノステアリン酸ヘキサグリセリル、モノオレイン酸ヘキサグリセリル、モノラウリン酸デカグリセリル、モノミリスチン酸デカグリセリル、モノステアリン酸デカグリセリル、モノイソステアリン酸デカグリセリル、モノオレイン酸デカグリセリル、ジステアリン酸デカグリセリル、ジイソステアリン酸デカグリセリル等を挙げることができる。
・「塗布試験」
調製した各例の水中油型乳化化粧料を、プレート上に所定量塗布し、形成された化粧膜を同じ力で塗擦し、化粧膜の色が変化するまでの塗擦回数(多層型カプセルが潰れて内包された顔料が露出するまでの塗擦回数)を専門パネラーによる目視観察で計測した。
<評価基準>
A:色が変化するまでの塗擦回数:3往復以内
B:色が変化するまでの塗擦回数:4~6往復
C:色が変化するまでの塗擦回数:7~9往復
D:色が変化するまでの塗擦回数:10往復以上
Claims (7)
- (A)顔料を含む多層型カプセル;
(B)分子量1000以下の塩;及び、
(C)多価アルコール、
を含む水中油型乳化化粧料であって、
前記(A)顔料を含む多層型カプセルに対する、前記(B)分子量1000以下の塩の配合量比率[(B)/(A)]が、0.003以上であることを特徴とする、水中油型乳化化粧料。 - (D)シリコーン系の非イオン性界面活性剤を更に含む、請求項1に記載の化粧料。
- 前記(D)非イオン性界面活性剤が、ポリエーテル変性シリコーンである、請求項2に記載の化粧料。
- (E)両親媒性物質を更に含む、請求項1に記載の化粧料。
- 前記(E)両親媒性物質が、低級アルコール及びその誘導体、及び、HLBが8~15の非シリコーン系の非イオン性界面活性剤からなる群から選択される少なくとも1種である、請求項4に記載の化粧料。
- 前記(B)分子量1000以下の塩が、塩化Na、メタリン酸塩、エチレンジアミン四酢酸塩、フェニルベンズイミダゾールスルホン酸塩、2-アミノ-2-メチル-1,3-プロパンジオール塩、塩型薬剤からなる群から選択される少なくとも1種である、請求項1に記載の化粧料。
- 前記(B)分子量1000以下の塩が、ナトリウム塩である、請求項1に記載の化粧料。
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041118A (ja) * | 1990-01-10 | 1992-01-06 | Matsumoto Yushi Seiyaku Co Ltd | 化粧料 |
| JP2007520567A (ja) * | 2004-02-10 | 2007-07-26 | ザ プロクター アンド ギャンブル カンパニー | 疎水変性架橋カチオン性増粘ポリマーを含むコンディショニング組成物 |
| JP2011529104A (ja) * | 2009-09-02 | 2011-12-01 | バイオジェニックス インコーポレイテッド | 化粧品用色調カプセル組成物、この製造方法及びこれを用いた化粧品製剤 |
| JP2015505316A (ja) * | 2012-01-17 | 2015-02-19 | ロレアルL′Oreal | 色変化組成物 |
| JP2016500113A (ja) * | 2012-11-30 | 2016-01-07 | ロレアル | 変色用組成物 |
| JP2016526568A (ja) * | 2013-07-12 | 2016-09-05 | ロレアルL′Oreal | オレオソームの形態のo/wエマルジョン形態の着色性組成物 |
-
2023
- 2023-12-01 CN CN202380078624.2A patent/CN120187395A/zh active Pending
- 2023-12-01 WO PCT/JP2023/043055 patent/WO2024128024A1/ja not_active Ceased
- 2023-12-01 JP JP2024564281A patent/JPWO2024128024A1/ja active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041118A (ja) * | 1990-01-10 | 1992-01-06 | Matsumoto Yushi Seiyaku Co Ltd | 化粧料 |
| JP2007520567A (ja) * | 2004-02-10 | 2007-07-26 | ザ プロクター アンド ギャンブル カンパニー | 疎水変性架橋カチオン性増粘ポリマーを含むコンディショニング組成物 |
| JP2011529104A (ja) * | 2009-09-02 | 2011-12-01 | バイオジェニックス インコーポレイテッド | 化粧品用色調カプセル組成物、この製造方法及びこれを用いた化粧品製剤 |
| JP2015505316A (ja) * | 2012-01-17 | 2015-02-19 | ロレアルL′Oreal | 色変化組成物 |
| JP2016500113A (ja) * | 2012-11-30 | 2016-01-07 | ロレアル | 変色用組成物 |
| JP2016526568A (ja) * | 2013-07-12 | 2016-09-05 | ロレアルL′Oreal | オレオソームの形態のo/wエマルジョン形態の着色性組成物 |
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