Classifications

• • 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
  • A61K8/062—Oil-in-water emulsions
• • 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
• • 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
• • 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
  • A61K8/342—Alcohols having more than seven atoms in an unbroken chain
• • 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
  • A61K8/37—Esters of carboxylic acids
• • 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
  • A61K8/39—Derivatives containing from 2 to 10 oxyalkylene groups
• • 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
  • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
  • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
  • A61K8/86—Polyethers
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q17/00—Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
  • A61Q17/04—Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
  • A61K2800/42—Colour properties
  • A61K2800/43—Pigments; Dyes

Definitions

• the present invention relates to oil-in-water cosmetics. More specifically, the present invention relates to oil-in-water cosmetics that are excellent in water resistance, usability, washability, and storage stability.
• Cosmetics that blend well with the skin, spread smoothly on the skin, and have excellent stability over time include (a) sodium acrylate-sodium acryloyldimethyltaurate copolymer, (b) gellan gum, (c) Oil-in-water cosmetics containing an electrolyte and (d) an oil agent have been proposed (see, for example, Patent Document 1). However, the oil-in-water cosmetics have poor water resistance when applied to human skin.
• cosmetics applied to the skin have the property of not being easily removed by moisture (hereinafter referred to as "water resistance”), the property of blending well with the skin, and the property of spreading smoothly on the skin (hereinafter referred to as “usability”). ), the property that cosmetics applied to the skin can be easily washed away (hereinafter referred to as ⁇ cleanability''), and the property that separation does not easily occur in cosmetics even in harsh environments (hereinafter referred to as ⁇ preservability''). It is desired to develop oil-in-water cosmetics with excellent stability.
• the present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide an oil-in-water cosmetic that is excellent in water resistance, usability, washability, and storage stability.
• the present invention provides (A) an emulsifying composition containing a monovalent linear aliphatic alcohol having 12 to 24 carbon atoms, polyglyceryl pentasteate, and sodium stearoyl lactylate, (B) an oil agent, and (C) an HLB value.
• the present invention relates to an oil-in-water cosmetic comprising a nonionic surfactant having a surfactant of 5 or more, and (D) an amphipathic pigment.
• an oil-in-water cosmetic that is excellent in water resistance, usability, washability, and storage stability is provided.
• the oil-in-water cosmetic of the present invention comprises (A) an emulsifying composition containing a monovalent linear aliphatic alcohol having 12 to 24 carbon atoms, polyglyceryl pentasteate, and sodium stearoyl lactylate; It contains (B) an oil agent, (C) a nonionic surfactant having an HLB value of 5 or more, and (D) an amphipathic pigment. Since the oil-in-water cosmetic composition of the present invention contains these ingredients, it has excellent water resistance, usability, cleansability, and storage stability.
• Emulsifying composition contains a monovalent linear aliphatic alcohol having 12 to 24 carbon atoms, polyglyceryl pentasteate, and sodium stearoyl lactylate.
• the emulsifying composition has properties that improve the fixation of oil-in-water cosmetics to the skin and improve water resistance.
• the content of the emulsifying composition in the oil-in-water cosmetic is preferably 1% by mass or more, more preferably 1.5% by mass, from the viewpoint of improving the fixation of the oil-in-water cosmetic on the skin and improving water resistance. It is preferably 12% by mass or less, and more preferably 10% by mass or less, from the viewpoint of improving the fixation of the oil-in-water cosmetic to the skin and improving water resistance as described above.
• a monovalent linear aliphatic alcohol having 12 to 24 carbon atoms is a component that improves the fixation of oil-in-water cosmetics to the skin and improves water resistance.
• Examples of monovalent linear aliphatic alcohols having 12 to 24 carbon atoms include cetyl alcohol (carbon number: 16), 1-heptadecanol (carbon number: 17), stearyl alcohol (carbon number: 18), nona Examples include decyl alcohol (carbon number: 19), arachidyl alcohol (carbon number: 20), heneicosanol (carbon number: 21), behenyl alcohol (carbon number: 22), but the present invention is limited to such examples. It is not limited to. These straight chain aliphatic alcohols may be used alone or in combination of two or more.
• monovalent linear aliphatic alcohols having 12 to 24 carbon atoms monovalent straight chain aliphatic alcohols having 16 to 22 carbon atoms are preferred from the viewpoint of improving the fixation of oil-in-water cosmetics on the skin and improving water resistance.
• Chain aliphatic alcohol is preferred, and at least one selected from the group consisting of cetyl alcohol, stearyl alcohol, arachidyl alcohol, and behenyl alcohol is more preferred.
• the lower limit of the content of the monovalent linear aliphatic alcohol having 12 to 24 carbon atoms in the emulsifying composition is preferably 40% by weight from the viewpoint of improving the fixing properties and water resistance of the oil-in-water cosmetic to the skin. % or more, more preferably 45% by mass or more.
• the upper limit of the content of the monovalent linear aliphatic alcohol having 12 to 24 carbon atoms in the emulsifying composition is preferably 60% by mass from the viewpoint of improving the fixing properties and water resistance of the oil-in-water cosmetic to the skin. % or less, more preferably 55% by mass or less.
• Polyglyceryl pentasteate is a component generally used as a lipophilic emulsifier. Polyglyceryl pentasteate has an HLB value of 3.5 and is also referred to as polyglyceryl-10 pentasteate or decaglyceryl pentasteate.
• the lower limit of the content of polyglyceryl pentasteate in the emulsifying composition is preferably 25% by mass or more, more preferably 30% by mass or more, from the viewpoint of improving the fixing properties and water resistance of the oil-in-water cosmetic on the skin. It is.
• the upper limit of the content of polyglyceryl pentasterate in the emulsifying composition is preferably 50% by mass or less, more preferably 45% by mass or less, from the viewpoint of improving the fixing properties and water resistance of the oil-in-water cosmetic on the skin. It is.
• Sodium stearoyl lactylate is an ester of stearic acid and the sodium salt of a dimer of lactic acid. Stearoyl lactylate Na is generally used as an anionic surfactant. Sodium stearoyl lactylate is also called sodium stearoyl lactylate. The molecular weight of sodium stearoyl lactylate is about 450.
• the lower limit of the content of Na stearoyl lactylate in the emulsifying composition is preferably 3% by mass or more, more preferably 5% by mass or more, from the viewpoint of improving the fixation properties and water resistance of the oil-in-water cosmetic on the skin. It is.
• the upper limit of the content of Na stearoyl lactylate in the emulsifying composition is preferably 25% by mass or less, more preferably 20% by mass or less, from the viewpoint of improving the fixing properties and water resistance of the oil-in-water cosmetic on the skin. It is.
• Oil agent may be any of vegetable oil, animal oil, and synthetic oil. These oil agents may be used alone or in combination of two or more. Among the oil agents, vegetable oils and synthetic oils are preferred from the viewpoint of improving the usability of oil-in-water cosmetics.
• vegetable oils examples include olive squalane, coconut oil, eucalyptus oil, olive oil, palm oil, macadamia nut oil, avocado oil, safflower oil, castor oil, jojoba oil, camellia oil, soybean oil, and sunflower oil. The present invention is not limited to such examples. These vegetable oils may be used alone or in combination of two or more.
• synthetic oils examples include ester oils, hydrocarbon oils, fats and oils, waxes, hydrogenated oils, higher alcohol oils, silicone oils, and fluorine oils, but the present invention is not limited to these examples. do not have. These synthetic oils may be used alone or in combination of two or more. Among synthetic oils, ester oils are preferred.
• ester oils include triethylhexanoin, cetyl octoate, ethyl oleate, isopropyl myristate, octyldodecyl myristate, myristyl myristate, isocetyl myristate, cetyl ethylhexanoate, hexyldecyl ethylhexanoate, isopentanoate.
• the lower limit of the content of the oil agent in the oil-in-water cosmetic is preferably 1% by mass or more, more preferably 5% by mass or more, from the viewpoint of improving the usability of the oil-in-water cosmetic.
• the upper limit of the content of the oil agent in the oil-in-water cosmetic is preferably 50% by mass or less, more preferably 30% by mass or less, from the viewpoint of improving the usability of the oil-in-water cosmetic.
• Nonionic surfactant with HLB value of 5 or more has the property of improving the dispersibility of amphipathic pigments contained in oil-in-water cosmetics. has.
• HLB hydrophilicity-lipophilic balance
• the lower limit of the HLB value of the nonionic surfactant is 5 or more, preferably 8 or more, more preferably 10 or more, from the viewpoint of improving the usability of oil-in-water cosmetics and the storage stability of oil-in-water cosmetics. It is.
• the upper limit of the HLB value of the nonionic surfactant is preferably 18 or less, more preferably 17 or less, and even more preferably is 16 or less, even more preferably 15 or less.
• nonionic surfactants with an HLB value of 5 or more include polyglyceryl-10 isostearate (HLB value: 12), polyglyceryl-10 myristate (HLB value: 11), and polyglyceryl-3 diisostearate (HLB value: Polyglycerin fatty acid esters such as 5); glyceryl fatty acid esters such as self-emulsifying glyceryl stearate (HLB value: 8); polyethylene glycol-3 glyceryl isostearate (HLB value: 6), polyethylene glycol-8 glyceryl isostearate (HLB Value: 10), polyethylene glycol-10 glyceryl diisostearate (HLB value: 7), polyethylene glycol-20 glyceryl triisostearate (HLB value: 8), polyethylene glycol (6) monoisostearate (HLB value: 9), Polyethylene glycol (10) monoisostearate (HLB value: 11), polyethylene glycol (100) monoisostearate (HLB value:
• nonionic surfactants with an HLB value of 5 or more, polyglycerin fatty acid esters, polyglycerin fatty acid esters, Polyethylene glycol fatty acid esters and glucoside compounds are preferred, and polyglyceryl-10 isostearate, polyglyceryl-10 myristate and (caprylyl/caprylic) glucoside are more preferred.
• the lower limit of the content of nonionic surfactants with an HLB value of 5 or more in oil-in-water cosmetics is based on the dispersibility of amphiphilic pigments in oil-in-water cosmetics and the storage stability of oil-in-water cosmetics. From the viewpoint of improvement, the content is preferably 0.05% by mass or more, more preferably 0.1% by mass or more.
• the upper limit of the content of nonionic surfactants with an HLB value of 5 or more in oil-in-water cosmetics is determined by the dispersibility of amphiphilic pigments in oil-in-water cosmetics and the storage stability of oil-in-water cosmetics. From the viewpoint of improvement, the content is preferably 10% by mass or less, more preferably 8% by mass or less, and still more preferably 5% by mass or less.
• amphipathic pigment is a pigment that has amphipathic properties.
• Amphipathic pigments are excipient components that have both hydrophilic and hydrophobic properties and are used to impart color to the skin.
• Typical amphipathic pigments include amphipathic pigments containing an amphiphilicity-imparting component.
• a pigment containing an amphiphilicity-imparting component can be obtained, for example, by attaching the amphipathicity-imparting component to the surface of the pigment.
• An amphiphilic pigment having an amphipathic property-imparting component attached to its surface has amphiphilic properties on its surface.
• pigment used for the amphipathic pigment it is possible to use a pigment that is insoluble in the solvent used in oil-in-water cosmetics and is generally used for coloring cosmetics.
• examples of such pigments include inorganic pigments, organic pigments, and pigments made of resin powder (hereinafter referred to as "resin powder pigments"). These pigments may be used alone or in combination of two or more.
• the inorganic pigments include, for example, titanium oxide, iron oxide (red iron oxide, yellow iron oxide, black iron oxide, red iron oxide, etc.), ultramarine, deep blue, zinc oxide, aluminum oxide, magnesium oxide, zirconium oxide, cerium oxide, mica. , sericite, talc, silica, kaolin, chromium hydroxide, carbon black, glass flakes, glass beads, bentonite, chromium oxide, magnesium carbonate, calcium carbonate, calcium silicate, magnesium silicate, aluminum silicate, silicon carbide, sulfuric acid
• particles of pigments such as barium, cobalt oxide, cobalt titanate, iron titanate, titanium nitride, manganese violet, and Berlin blue, but the present invention is not limited to these examples. These inorganic pigments may be used alone or in combination of two or more.
• organic pigment examples include particles of pigments such as Lysol Rubin B, Lake Red C, Lysol Red, Rhodamine B, Herringdon Pink CN, Permanent Red, Benzyl Orange G, and Phthalocyanine Blue.
• the examples are not limited to examples only. These organic pigments may be used alone or in combination of two or more.
• the resin powder pigment examples include cellulose particles, polyamide particles typified by nylon particles, acrylic resin particles, silicone resin particles, polyurethane particles, and fluororesin particles typified by polytetrafluoroethylene particles.
• the present invention is not limited to such examples. These resin powder pigments may be used alone, or two or more types may be used in combination.
• inorganic pigments are preferred from the viewpoint of improving the adhesion of amphiphilicity-imparting components, such as titanium oxide, iron oxide, ultramarine, deep blue, zinc oxide, aluminum oxide, magnesium oxide, zirconium oxide, cerium oxide, and mica. , sericite, talc, silica and kaolin particles are more preferred.
• the shape of the pigment There is no particular limitation on the shape of the pigment.
• examples of the shape of the pigment include spherical, ellipsoidal, cylindrical, spindle, and irregular shapes, but the present invention is not limited to these examples.
• the amphiphilic property-imparting component is a component for imparting amphiphilic property to the surface of the pigment.
• amphiphilicity-imparting components include amino acids, acylated amino acids, and glycolipids, but the present invention is not limited to these examples. These amphipathic properties imparting components may be used alone or in combination of two or more. In the present invention, any of amino acids, acylated amino acids, and glycolipids can be suitably used.
• amino acids and the acylated amino acids include lauroyl glutamic acid and its alkali metal salts, stearoyl glutamic acid and its alkali metal salts, palmitoylproline and its alkali metal salts, palmitoyl sarcosinate and its alkali metal salts, palmitoyl glutamic acid and its alkali metal salts, and palmitoyl glutamic acid and its alkali metal salts.
• Metal salts palmitic acid and its alkali metal salts, cocoyl glutamic acid and its alkali metal salts, N-acyl-N-methylglycine, N-acyl-N-methyl- ⁇ -alanine, N-acyl-L-glutamate calcium, N -Magnesium acyl-L-glutamate, aluminum N-acyl-L-glutamate, zinc N-acyl-L-glutamate, titanium N-acyl-L-glutamate, etc., but the present invention is limited only to such examples. It's not something you can do. These amino acids and acylated amino acids may be used alone or in combination of two or more. Examples of the alkali metal include sodium and potassium. Among these alkali metals, sodium is preferred.
• glycolipid examples include mannosylerythritol lipid, which is a glycolipid composed of mannose, sugar alcohol, and fatty acid, but the present invention is not limited to such examples.
• amphipathic property-imparting ingredients amino acids and their alkali metal salts, and acylated amino acids are preferred from the viewpoint of improving the dispersibility of amphipathic pigments in oil-in-water cosmetics and the storage stability of oil-in-water cosmetics. and its alkali metal salts are preferred, lauroylglutamic acid and its alkali metal salts, stearoylglutamic acid and its alkali metal salts, palmitoylglutamic acid and its alkali metal salts, cocoylglutamic acid and its alkali metal salts, palmitoylproline and its alkali metal salts, palmitoyl sarcosine.
• Acids and their alkali metal salts, and palmitic acid and their alkali metal salts are more preferred, lauroylglutamic acid and its alkali metal salts, stearoylglutamic acid and its alkali metal salts, palmitoylglutamic acid and its alkali metal salts, and cocoylglutamic acid and its alkali metal salts. Salt is more preferred.
• the content of the amphiphilicity-imparting component in the amphipathic pigment is preferably 0.3 to 0.3 from the viewpoint of improving the dispersibility of the amphipathic pigment in the oil-in-water cosmetic and the storage stability of the oil-in-water cosmetic. 5% by weight, more preferably 0.5-3% by weight.
• an amphipathic property-imparting component is added to a suspension of a pigment in water, and the resulting mixture is stirred to impart amphiphilic properties to the surface of the pigment.
• Examples include a method of attaching the amphiphilicity-imparting component and then drying the pigment on the surface of which the amphipathicity-imparting component is attached; however, the present invention is not limited to such a method.
• amphiphilic pigments include pigments treated with amino acids (amino acid-treated pigments), pigments treated with glycolipids (glycolipid-treated pigments), and pigments treated with lecithin (lecithin-treated pigments). It will be done.
• Amphiphilic pigments can be easily obtained commercially.
• amphiphilic pigment products include Daito Kasei Kogyo Co., Ltd.'s product names: ASL-1 series, SMS series, LTS series, etc.; Miyoshi Kasei Co., Ltd.'s product names: NAI series, LP series, etc.
• Examples include the CAI series, but the present invention is not limited to such examples.
• the average particle diameter of the amphipathic pigment is not particularly limited.
• the average particle diameter of the amphiphilic pigment is preferably 0.1 ⁇ m or more, more preferably 0.15 ⁇ m or more, from the viewpoint of improving the storage stability of the oil-in-water cosmetic, and the oil-in-water cosmetic can be applied to the skin. From the viewpoint of reducing the rough feeling when applied and improving the usability of oil-in-water cosmetics, the diameter is preferably 400 ⁇ m or less, more preferably 350 ⁇ m or less, and still more preferably 300 ⁇ m or less.
• the average particle diameter of particles means the median diameter determined from a volume-based particle size distribution measured by a laser scattering method.
• the content of the amphiphilic pigment in the oil-in-water cosmetic is preferably 0.3% by mass or more, more preferably 0.5% by mass, from the viewpoint of imparting shapeability to the dry film of the oil-in-water cosmetic. From the viewpoint of improving the storage stability of oil-in-water cosmetics and the usability of oil-in-water cosmetics, the content is preferably 55% by mass or less, more preferably 50% by mass or less.
• Water-soluble components commonly used in cosmetics can be used in oil-in-water cosmetics.
• water-soluble components include ethanol, isopropanol, n-butanol, propylene glycol, dipropylene glycol, butanediol, polyethylene glycol, glycerin, diglycerin, polyglycerin, glyceryl glucoxide, phenoxyethanol, xanthan gum, guar gum, carrageenan, muco
• Examples include polysaccharide, sodium chondroitin sulfate, hyaluronic acid, collagen, elastin, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, carboxyvinyl polymer, polyvinyl alcohol, polyvinylpyrrolidone, sodium polyacrylate, etc., but the present invention is limited only to such examples. It is not something that will be done.
• These water-soluble components may be used alone or in combination of two or more.
• the lower limit of the content of the water-soluble component in the oil-in-water cosmetic is preferably 0.3% by mass from the viewpoint of expressing the effect based on the water-soluble component and improving the usability of the oil-in-water cosmetic.
• the content is more preferably 0.5% by mass or more.
• the upper limit of the content of the water-soluble component in the oil-in-water cosmetic is preferably 35% by mass or less, from the viewpoint of expressing the effect based on the water-soluble component and improving the usability of the oil-in-water cosmetic. More preferably, it is 20% by mass or less.
• the oil-in-water cosmetic composition contains an ultraviolet protection agent from the viewpoint of avoiding the adverse effects of ultraviolet rays on the skin.
• the ultraviolet protective agent include ultraviolet absorbers and ultraviolet scattering agents, but the present invention is not limited to these examples. These UV protection agents may be used alone or in combination.
• Examples of the ultraviolet absorber include 2-hydroxy-4-methoxybenzophenone, 2,4-dihydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, and 2,2'-dihydroxy-4-methoxybenzophenone.
• UV absorbers such as isopropyldibenzoylmethane, 4-methoxydibenzoylmethane, 4-tert-butyl-4'-hydroxydibenzoylmethane; para-aminobenzoic acid, ethyl para-aminobenzoate, butyl para-aminobenzoate, Benzoic acid-based UV absorbers such as 2-ethylhexyl dimethylaminobenzoate, glyceryl para-aminobenzoate, octyl para-dimethylaminobenzoate, amyl para-aminobenzoate, hexyl diethylaminohydroxybenzoy
• Triazine UV absorbers such as bisethylhexyloxyphenol methoxyphenyl triazine; methyl salicylate, 2-ethylhexyl salicylate, phenyl salicylate, amyl salicylate, benzyl salicylate, isopropylbenzyl salicylate, ethylene glycol salicylate, dipropylene glycol salicylate,
• salicylic acid-based ultraviolet absorbers such as triethanolamine salicylate
• anthranilic acid-based ultraviolet absorbers such as menthyl anthranilate; however, the present invention is not limited to these examples. These ultraviolet absorbers may be used alone or in combination of two or more.
• the ultraviolet scattering agent examples include titanium oxide, titanium dioxide, zinc oxide, zirconium oxide, and cerium oxide, but the present invention is not limited to these examples. These ultraviolet scattering agents may be used alone or in combination of two or more.
• the average particle diameter of the ultraviolet scattering agent is preferably 5 to 300 nm, more preferably 10 to 80 nm.
• the content of the ultraviolet protection agent in an oil-in-water cosmetic varies depending on the type of ultraviolet protection agent, and therefore cannot be determined unconditionally.
• the content of the ultraviolet protective agent in the oil-in-water cosmetic is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and still more preferably 0.1% by mass or more, from the viewpoint of sufficiently expressing UV protection.
• the content is 5% by mass or more, and from the viewpoint of improving the usability of oil-in-water cosmetics, the content is preferably 30% by mass or less, more preferably 20% by mass or less, and even more preferably 10% by mass or less.
• the oil-in-water cosmetic may contain additives that are generally used in oil-in-water cosmetics, within a range that does not impede the object of the present invention.
• additives include chelating agents such as sodium ethylenediaminetetraacetic acid, antioxidants, vitamins, ingredients for beautiful skin, colorants, thickeners, preservatives, antioxidants, feel improvers, moisturizers, and refreshing agents. agents, anti-inflammatory agents, fragrances, pH adjusters, film-forming agents, astringents, etc., but the present invention is not limited to these examples.
• each component of the oil-in-water cosmetic is water.
• the amount of water is adjusted so that each component is contained at a predetermined content rate in the oil-in-water cosmetic.
• the amount of water used in oil-in-water cosmetics is not particularly limited, but usually includes (A) an emulsifying composition, (B) an oil agent, (C) a nonionic surfactant with an HLB value of 5 or more, ( The amount is preferably 20 to 100 parts by mass per 100 parts by mass of the total amount of D) amphipathic pigment, (E) water-soluble component, (F) ultraviolet protection agent, and (G) additive.
• Oil-in-water cosmetics include, for example, (A) an emulsifying composition, (B) an oil agent, (C) a nonionic surfactant with an HLB value of 5 or more, and (D) an amphipathic pigment, and as necessary. It can be prepared by gradually adding components such as (E) a water-soluble component, (F) an ultraviolet protection agent, and (G) an additive to water under stirring.
• oil-in-water cosmetics include, for example, (A) an emulsifying composition, (B) an oil agent, (C) a nonionic surfactant with an HLB value of 5 or more, and (D) an amphipathic pigment, water , and components such as (E) water-soluble component, (F) ultraviolet protection agent, and (G) additives used as necessary are mixed and dispersed to a uniform composition, and the resulting dispersion is mixed and dispersed. It may also be prepared by placing it in a container of a predetermined shape and molding it. When preparing the dispersion, each component may be mixed while being heated in order to uniformly disperse each component.
• oil-in-water cosmetic may be in the form of cream, gel, or emulsion.
• Oil-in-water cosmetics can be used, for example, as oil-in-water emulsions for sunscreens, oil-in-water foundations for sunscreens, and the like.
• the shape of the oil-in-water cosmetic varies depending on the use of the oil-in-water cosmetic and cannot be determined unconditionally, so it is preferably determined as appropriate depending on the use.
• the shape of the oil-in-water cosmetic may include a stick shape, a plate shape, a cylindrical shape, etc., but the present invention is limited only to such examples. isn't it.
• the oil-in-water cosmetic can be used, for example, by filling it into a container such as a resin container or a metal container that has a predetermined shape on the inner surface.
• the oil-in-water cosmetic of the present invention obtained as described above is excellent in water resistance, usability, washability, and storage stability of an oil-in-water cosmetic.
• Examples 1 to 51 and Comparative Examples 1 to 9 A dispersion is prepared by mixing each component shown in each table below (unit of amount of each component listed in the table: mass %) under stirring to obtain a uniform composition, and the resulting dispersion is After degassing, an oil-in-water foundation was obtained by filling a mold having an inner surface shape corresponding to an oil-in-water foundation having a predetermined shape.
• the particle size of the amino acid-treated pigment used as the amphipathic pigment in each example is within the range of 0.15 to 100 ⁇ m, and the amino acid is attached to the surface of the pigment.
• the content of amino acids in the amino acid-treated pigment is about 1% by mass.
• each glycolipid-treated particle used as an amphiphilic pigment in each example is within the range of 0.15 to 100 ⁇ m, and glycolipid (mannose) is attached to the surface of the pigment.
• the content of glycolipid in each glycolipid-treated pigment is approximately 1% by mass.
• the particle diameters of the silica-treated pigment and silicone-treated pigment used in each comparative example are both within the range of 0.15 to 100 ⁇ m, and silica or silicone is attached to the surface of the pigment.
• the content of silica in the silica-treated pigment is about 1% by weight, and the content of silicone in the silicone-treated pigment is about 1% by weight.
• the particle diameters of the mica, titanium oxide, red iron oxide, yellow iron oxide, and black iron oxide particles used in the comparative example are all within the range of 0.15 to 100 ⁇ m.
• the treated pigment refers to a pigment whose surface has been subjected to physical treatment or chemical treatment.
• the physical treatment include adhesion, coating, and the like.
• the chemical treatment include coupling treatment.
• the surface of the pigment may be subjected to both physical treatment and chemical treatment.
• the average particle size of the titanium oxide fine particles used in each example is 15 ⁇ m, and the average particle size of the zinc oxide fine particles is 35 ⁇ m.
• Sample A was obtained by immersing the bioskin plate dried above in water at a temperature of 30°C for 30 minutes, then taking it out of the water and drying it at room temperature (about 25°C) for 20 minutes.
• the bioskin plate dried above was immersed in water at a temperature of 30°C for 30 minutes, further immersed for 2 hours while stirring the water with a stirrer, and then taken out of the water and placed at room temperature (approximately 25°C).
• Sample B was obtained by drying for 20 minutes.
• the color difference ⁇ E * ab of sample A and sample B obtained above was measured using a color difference meter [manufactured by Konica Minolta Japan, Inc., product number: CM-26dG] under the measurement conditions of 10°/D65 SCE (no gloss). The measurements were taken at room temperature.
• the color difference ⁇ E * ab measured above is used as an index for evaluating the property (water resistance) of a cosmetic applied to human skin that is difficult to remove due to moisture, etc., and the water resistance of the dry film is evaluated based on the following evaluation criteria. evaluated. Note that the smaller the numerical value of the color difference ⁇ E * ab, the better the water resistance.
• ⁇ The color difference ⁇ E * ab of sample A and the color difference ⁇ E * ab of sample B are both less than 2.00.
• Good The color difference ⁇ E * ab of sample A is less than 2.00, but the color difference ⁇ E * ab of sample B is 2.00 or more and less than 3.0.
• ⁇ The color difference ⁇ E * ab of sample A and the color difference ⁇ E * ab of sample B are both 2.0 or more and less than 3.0.
• ⁇ The color difference ⁇ E * ab of sample A and the color difference ⁇ E * ab of sample B are both 3.0 or more.
• the back of the hand was dried with a hot air dryer, and the dried back of the hand was observed under an optical microscope (magnification: 20x), and the coated surface was observed at that time. was photographed.
• [Storage stability] Fill a sealed container with foundation, put the foundation in a constant temperature room with a room temperature of 50 degrees Celsius, store it for 14 days, take out the foundation from the constant temperature room, visually observe its surface condition, and evaluate it according to the following evaluation criteria.
• the storage stability was evaluated based on the following.
• [Amphiphilic pigment] ⁇ Amino acid-treated mica particles A: lauroyl glutamic acid-attached mica particles ⁇ Amino acid-treated titanium oxide particles B: lauroyl glutamic acid-attached titanium particles ⁇ Amino acid-treated red iron oxide particles C: lauroyl glutamic acid-attached red iron oxide particles ⁇ Amino acid-treated yellow iron oxide particles D: Lauroyl glutamic acid-attached yellow iron oxide particles/amino acid-treated black iron oxide particles E: lauroyl glutamic acid-attached black iron oxide particles/amino acid-treated mica particles F: stearoyl glutamic acid-treated mica particles/amino acid-treated titanium oxide particles G: stearoyl glutamic acid-treated titanium oxide particles/ Amino acid-treated red iron oxide particles H: Stearoylglutamic acid-treated red iron oxide particles/amino acid-treated yellow oxide particles I: Stearoylglutamic acid-treated yellow oxide particles/amino
• Example 10 From the results shown in Table 10, the oil-in-water foundation obtained in Example 1 was significantly superior in water resistance compared to commercial product A, which is a conventional oil-in-water foundation, and It can be seen that the water resistance is comparable to that of commercially available water-in-oil foundation B, which has excellent water resistance.
• Example 1 From the results of the water resistance reference test and the washability reference test, the oil-in-water foundation obtained in Example 1 has superior water resistance compared to commercial product A, commercial product B, and commercial product C. It can be seen that it also has both excellent cleaning properties.
• oil-in-water foundation was investigated as a representative example of the oil-in-water cosmetic of the present invention, but it is believed that other oil-in-water cosmetics such as an oil-in-water emulsion can also have the same effects as described above. Of course.

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• 2023
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