WO2022220047A1 - Composition cosmétique en émulsion huile dans eau - Google Patents

Composition cosmétique en émulsion huile dans eau Download PDF

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Publication number
WO2022220047A1
WO2022220047A1 PCT/JP2022/013804 JP2022013804W WO2022220047A1 WO 2022220047 A1 WO2022220047 A1 WO 2022220047A1 JP 2022013804 W JP2022013804 W JP 2022013804W WO 2022220047 A1 WO2022220047 A1 WO 2022220047A1
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oil
mass
water
phase
component
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PCT/JP2022/013804
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English (en)
Japanese (ja)
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純也 近藤
小幡俊介
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ジェイオーコスメティックス株式会社
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Priority to CN202280028319.8A priority Critical patent/CN117222392A/zh
Publication of WO2022220047A1 publication Critical patent/WO2022220047A1/fr

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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
    • 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
    • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
    • A61K8/365—Hydroxycarboxylic acids; Ketocarboxylic 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
    • A61K8/37—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
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • 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

Definitions

  • the present invention relates to an oil-in-water emulsified cosmetic suitable as a sunscreen, and more particularly to an oil-in-water emulsified cosmetic excellent in sunscreen effect, feeling of use, and storage stability.
  • Sunscreen cosmetics usually use an organic UV absorber as a sunscreen ingredient, or an UV scattering agent consisting of inorganic fine particles such as titanium oxide and zinc oxide.
  • organic UV absorbers are toxic when used in a large amount to enhance the UV absorption effect. From the standpoint of safety, the use of UV scattering agents composed of inorganic fine particles is desired.
  • Oil-in-water type and water-in-oil emulsifier type are widely used as the dosage form of sunscreen cosmetics. Gives a fresh touch at times, and is also excellent in terms of elongation and spread. On the other hand, oil-in-water emulsifiers have drawbacks such as insufficient water resistance and storage stability, and attempts have been made to improve these drawbacks.
  • a fine particle inorganic powder (A) subjected to a hydrophobic organic surface treatment a surfactant (B) such as a polyglycerin fatty acid ester having an HLB of 9.5 or less, and a water-based thickener are included.
  • An oil-in-water emulsified cosmetic is disclosed (see claim 1).
  • the use of a specific surfactant having an HLB of 9.5 or less, preferably 8 to 9.5 enables stable blending of the hydrophobized fine particle inorganic powder into the aqueous phase ( See paragraph 0014).
  • Example 15 The only sunscreen O/W cream described in Example 15 contains sorbitan sesquiisostearate (HLB: 4.5) and PEG-12 isostearate (HLB: 4.5) without previously dispersing fine inorganic powder in an aqueous medium. : 12).
  • HLB sorbitan sesquiisostearate
  • HLB PEG-12 isostearate
  • this Example 15 there is no description of a specific preparation method, and it is not clear whether the fine particle inorganic powder is dispersed in the aqueous phase or the oil phase, but the technical feature of the invention is "hydrophobic Since it is an oil-in-water emulsified cosmetic containing an organic surface-treated fine particle inorganic powder in an aqueous phase" (see paragraph 0001), the cosmetic of Example 15 also contains fine particle inorganic powder in the same manner as the other examples. It is considered to be contained in the aqueous phase.
  • an oil-in-water emulsified cosmetic in which fine particles of inorganic powder subjected to a hydrophobic organic surface treatment are dispersed in an oil phase.
  • An oil-in-water emulsified cosmetic is disclosed in which (a) zinc oxide is dispersed in an oil system containing (e) silicone oil.
  • This cosmetic contains zinc oxide in the oil phase, and is excellent in storage stability (stability over time), feeling in use, and water resistance (Paragraph 0011). It is also described that good storage stability in this cosmetic is obtained by dispersing zinc oxide in an oil system, ie, an oil phase (see paragraph 0033). However, in the case of this cosmetic, it is essential to contain silicone oil as at least part of the oil, and it is stated that good results cannot be obtained if other oils such as liquid paraffin are used (Table 3). Comparative Example 3, paragraph 0055), and inorganic fine particles such as zinc oxide generally have a high cohesive force between particles and increase the viscosity of the oil phase, so it is difficult to finely disperse the oil phase in the water phase. I had a problem.
  • Patent Document 3 describes (a) a silicone activator with an HLB of 8 or less modified by any of a carboxyl group, an amide group, a pyrrolidone carboxyl group, an ester group, a glycerin group, or a polyglycerin group, and (b) a low-viscosity silicone oil. , (c) an ultraviolet scattering agent made of a hydrophobized inorganic powder, (d) a water-soluble polymer compound, (e) a nonionic surfactant having an HLB of 10 or more, and (f) water, and (c) An oil-in-water type sunscreen cosmetic is disclosed in which components are substantially dispersed in an oil phase (see claim 2).
  • the dispersibility of the UV scattering agent in the oil phase is improved by blending component (a) as a dispersant for component (c).
  • component (a) as a dispersant for component (c).
  • the preparation of this cosmetic requires the use of a specific silicone activator and a low-viscosity silicone oil, which imposes restrictions on raw materials. There was a problem that the feeling of use was not sufficient due to the presence of the adhesive (see Comparative Example 3 described later).
  • oil-in-water emulsified cosmetics in which an ultraviolet scattering agent composed of a hydrophobized inorganic powder is blended in the oil phase have been conventionally known.
  • An attempt to increase the concentration of the inorganic powder results in poor dispersion, and even with the use of commonly used dispersants (for example, polyhydroxystearic acid and sorbitan sesquiisostearate), sufficient dispersibility cannot be obtained. (See Comparative Example 4 below).
  • the present invention was completed based on such background art, and its purpose is to provide an oil-in-water emulsified cosmetic excellent in sunscreen effect, usability, and storage stability.
  • a specific hydrophobized inorganic powder is used in an oil-in-water emulsified cosmetic in which a hydrophobized inorganic powder is dispersed in an oil phase. And, when a specific dispersant and a specific surfactant are used in combination, good dispersibility can be obtained even when the ultraviolet scattering agent made of inorganic powder is contained at a high concentration. I have perfected my invention.
  • 0.1 to 3% by mass of the aqueous polymer (A) containing 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof as a structural unit is hydrophobized with a trialkoxyalkylsilane.
  • the oil-in-water emulsified cosmetic of the present invention is excellent in sunscreen effect, usability and storage stability.
  • the oil-in-water emulsified cosmetic of the present invention comprises an aqueous polymer (A) containing 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof as a structural unit as an essential ingredient, and an inorganic hydrophobized with a trialkoxyalkylsilane. It contains a powdery UV scattering agent (B), polyhydroxystearic acid (C), polyglycerin fatty acid ester (D) with an HLB value of 5 to 8, liquid oil (E) and water (F).
  • A aqueous polymer
  • A 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof as a structural unit as an essential ingredient
  • an inorganic hydrophobized with a trialkoxyalkylsilane contains a powdery UV scattering agent (B), polyhydroxystearic acid (C), polyglycerin fatty acid ester (D) with an HLB value of 5 to 8, liquid oil (E) and water (F).
  • B
  • the aqueous polymer used as the component (A) of the present invention is used for stabilizing the oil-in-water emulsion, preferably 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof (hereinafter referred to as "AMPS " may be abbreviated.) as a constituent unit.
  • AMPS 2-acrylamido-2-methylpropanesulfonic acid or a salt thereof
  • aqueous polymers include (acryloyldimethyltaurate ammonium/VP) copolymer, (acryloyldimethyltaurate Na/VP) crosspolymer, (dimethylacrylamide/acryloyldimethyltaurate Na) crosspolymer, (acrylamide/acryloyldimethyltaurate Na) copolymer , (Na acrylate/Na acryloyldimethyltaurate) copolymer, (Hydroxyethyl acrylate/Na acryloyldimethyltaurate) copolymer, and the like.
  • (Na acrylate/Na acryloyldimethyl taurate) copolymers and (Hydroxyethyl acrylate/Na acryloyldimethyl taurate) copolymers are preferably used.
  • aqueous polymers examples include FLOCARE PSD-30 manufactured by SNF Co., Ltd., which is a (Na acrylate/Na acryloyldimethyltaurate) copolymer, and SIMULGEL-EG, manufactured by SEPPIC Co., which is a dispersion containing this polymer. and SIMULGEL-NS, which is a dispersion containing hydroxyethyl/acryloyldimethyltaurate Na) copolymer.
  • the content of component (A) is 0.1 to 3% by mass, preferably 0.2 to 2% by mass, more preferably 0.3 to 1.5% by mass, based on the total cosmetic composition. If the content of component (A) is too low, it is likely to cause phenomena such as separation of the oil phase and the water phase, oil floating, emulsification failure, and aggregation, resulting in poor stability. become a thing.
  • the mass % of each component in the following description is also based on the entire cosmetic.
  • the component (B) used in the present invention is an inorganic powder that has not been hydrophobized with a trialkoxyalkylsilane used as an ultraviolet scattering agent.
  • the inorganic powder used as the base material may be any powder that can be usually blended in sunscreen cosmetics, and specific examples thereof include zinc oxide, titanium oxide, cerium oxide, zirconium oxide, and iron oxide. . Although these may be used alone, two or more of them may be used in combination, and two or more of them may be used in combination. Among them, zinc oxide or titanium oxide is preferable from the viewpoint of the feeling of use and finish of the cosmetic.
  • the particle size, shape, and the like of the inorganic powder are not particularly limited, but those having an average primary particle size in the range of 1 to 100 nm are preferable from the viewpoint of the UV protection effect. These particle sizes can be obtained as number average particle sizes using a transmission or scanning electron microscope.
  • the geometric form of the inorganic powder may be spherical, polyhedral, spindle-shaped, needle-shaped, plate-shaped, etc., as long as it is usually used in sunscreen cosmetics. These inorganic powders are generally used after being surface-treated with an inorganic material such as alumina or silica in order to impart surface activity blockage and dispersibility.
  • a hydrophobizing treatment is usually performed with an oil agent, metal soap, organopolysiloxane, fluorine, etc.
  • treatment with trialkoxyalkylsilane is performed. It is necessary to use The effect of the present invention cannot be obtained even if other silicone compounds such as hydrophobized inorganic powder treated with hydrogen dimethicone are used instead of trialkoxyalkylsilane (see Comparative Example 6).
  • the trialkoxyalkylsilane is a compound in which three alkoxy groups and one alkyl group are bonded to a silicon atom, and the alkoxy groups react with hydroxyl groups, etc. on the powder surface to coat the powder surface.
  • Preferred alkoxy groups have 1 to 3 carbon atoms, and specific examples thereof include methoxy, ethoxy and propoxy groups.
  • Preferred alkyl groups have 6 to 18 carbon atoms, and specific examples thereof include hexyl, octyl, decyl and octadecyl groups.
  • Such trialkoxyalkylsilanes include, for example, trimethoxyhexylsilane, trimethoxyoctylsilane, trimethoxydecylsilane, trimethoxyoctadecylsilane, triethoxyhexylsilane, triethoxyoctylsilane (cosmetics display name: triethoxycaprylylsilane ), triethoxydecylsilane, triethoxyoctadecylsilane, etc. These may be used alone or in combination of two or more.
  • a commercial product can be used as the fine particle powder surface-coated with trialkoxyalkylsilane as the component (B).
  • Examples of commercially available products include MTX-05OTS (average particle size: 10 nm) manufactured by Tayca Co., Ltd., which is triethoxycaprylylsilane-coated fine particle titanium oxide, and MZX-508OTS (average particle size, 25 nm) and MZX-304OTS (average particle size 35 nm).
  • the content of component (B) is 10 to 40% by mass, preferably 12 to 38% by mass, more preferably 15 to 35% by mass, still more preferably 18 to 35% by mass. If the content of component (B) is too low, a high sunscreen effect cannot be obtained. , the storage stability is lowered, and the spreadability on the skin is also lowered.
  • the mass ratio of the powder component in the oil phase containing the component (B) to the entire oil phase [the proportion of the powder component in the oil phase is 40-70% by mass, preferably 50-60% by mass.
  • the amount of component (B) is in this range, it is possible to satisfy high sunscreen effect, excellent feeling during use (ease of spreading and fresh feeling), and storage stability.
  • (C) polyhydroxystearic acid is used as a dispersant for the inorganic powder contained in the oil phase.
  • Polyhydroxystearic acid is a polymer of hydroxystearic acid having one hydroxyl group.
  • the hydroxyl group of hydroxystearic acid is preferably at position 12, and the degree of polymerization of hydroxystearic acid is 3 to 12.
  • a degree of polymerization of 4 to 8 is preferred.
  • component (C) Commercially available products of component (C) include, for example, Salacos HS-6C (manufactured by Nisshin OilliO Group).
  • the content of component (C) is 0.1 to 5% by mass, preferably 0.2 to 3% by mass, more preferably 0.3 to 2% by mass. If the content of component (C) is too low, the dispersion of component (B) will be insufficient, resulting in poor usability and storage stability. If the content of component (C) is excessively high, stickiness will occur.
  • (D) a polyglycerin fatty acid ester having an HLB value of 5 to 8 is contained in the oil phase for stabilization of the oil-in-water emulsion.
  • the fatty acid that is the hydrophobic group portion of the polyglycerol fatty acid ester preferably has 12 to 30 carbon atoms, more preferably 16 to 22 carbon atoms.
  • Fatty acids may be either saturated or unsaturated fatty acids, and may or may not have branched carbon chains, but unsaturated fatty acids or saturated branched fatty acids are preferred.
  • the hydrophilic group portion of the polyglycerin fatty acid ester preferably has a polymerization degree of glycerin of 2 to 20, more preferably 4 to 15, and particularly preferably 10.
  • the HLB of the polyglycerol fatty acid ester is 5-8, preferably 6-7.5.
  • the HLB value is within this range, the oil phase containing a large amount of fine particle powder can be stably dispersed in the water phase, and a fresh and spreadable feeling in use and high storage stability can be achieved.
  • HLB is an index that indicates the balance of hydrophilicity and lipophilicity of nonionic surfactants in a value from 0 to 20.
  • HLB value 20 ⁇ sum of formula weights of hydrophilic moieties / molecular weight
  • Such polyglycerol fatty acid esters include polyglyceryl-10 trioleate, polyglyceryl-6 diisostearate, polyglyceryl-10 tristearate, polyglyceryl-2 sesquicaprylate, polyglyceryl-4 stearate, polyglyceryl-10 triisostearate, Polyglyceryl-10 pentaisostearate is preferred, and polyglyceryl-10 trioleate is particularly preferred.
  • component (D) examples include NIKKOL Decaglyn 3-OV (manufactured by Nikko Chemicals Co., Ltd., polyglyceryl trioleate-10, HLB value 7), EMALEX DISG-6 (manufactured by Nippon Emulsion Co., Ltd., polyglyceryl diisostearate-6EX, HLB value 8), NIKKOL Decaglyn 3-SV (manufactured by Nikko Chemicals, polyglyceryl-10 tristearate, HLB value 7.5), and the like.
  • the content of component (D) is 0.1 to 5% by mass, preferably 0.2 to 3% by mass, more preferably 0.3 to 2% by mass. If the content of component (D) is too low, the feel during use and the storage stability will deteriorate. If the content of component (D) is excessively high, stickiness will occur.
  • liquid oil In the oil-in-water sunscreen cosmetic of the present invention, (E) liquid oil is used to disperse the inorganic powder of component (B), which is a sunscreen component, and to spread it on the skin.
  • component (B) which is a sunscreen component
  • liquid oil means oil having fluidity at room temperature (25°C) and semi-solid oil having a melting point of less than 50°C.
  • the (E) liquid oil used in the present invention is not particularly limited as long as it is used in ordinary cosmetics, and may be any of animal oil, vegetable oil, and synthetic oil.
  • Specific examples of liquid oils include triethylhexanoin, tri(caprylic/capric)glyceryl, neopentyl glycol dicaprate, isononyl isononanoate, isotridecyl isononanoate, ethylhexyl palmitate, isopropyl myristate, isopropyl palmitate, and octyl myristate.
  • Esters such as dodecyl, diisostearyl malate, oligomeric esters of dimer acid and dimer diol, pentaerythrityl tetraisostearate, diglyceryl tetraisostearate, cetyl isooctanoate, cholesterol fatty acid esters, jojoba oil; Volatile isoparaffins, Hydrocarbons such as polybutene, polyisobutylene, heavy liquid isoparaffin, liquid paraffin, ⁇ -olefin oligomer, squalane, petrolatum; Fats and oils such as olive oil, castor oil, mink oil, macadamia nut oil; Isostearic acid, oleic acid, etc.
  • higher alcohols such as oleyl alcohol and isostearyl alcohol; low polymerization degree dimethylpolysiloxane, cyclic silicone, high polymerization degree dimethylpolysiloxane, methylphenylpolysiloxane, methyltrimethicone, caprylyl trimethicone, crosslinked organo silicone oils such as polysiloxane and fluorine-modified polysiloxane; fluorine-based oils such as perfluoropolyether; lanolin derivatives such as lanolin, lanolin acetate, isopropyl lanolin fatty acid, and lanolin alcohol;
  • the viscosity of the liquid oil at 25° C. is usually 1 to 200 mPa ⁇ s, preferably 5 to 100 mPa ⁇ s, and ester oils are particularly preferred.
  • the viscosity of the liquid oil is measured with a Brookfield viscometer.
  • Specific examples of ester oils include triethylhexanoin, tri(caprylic/capric)glyceryl, neopentyl glycol dicaprate, isononyl isononanoate, isotridecyl isononanoate, ethylhexyl palmitate, and isopropyl myristate.
  • the content of the ester oil having a viscosity of 1 to 200 mPa ⁇ s at 25° C. is preferably 10 to 100% by mass based on the total liquid oil content.
  • the content of liquid oil is preferably 7 to 40% by mass, more preferably 10 to 35% by mass, still more preferably 12 to 30% by mass. If the amount of component (E) is too small, it will be difficult to disperse the fine metal oxide particles of component (B), and the ease of spreading will also decrease. If it is too much, it lacks freshness and gives a sticky feel.
  • oil phase In the oil-in-water sunscreen cosmetic of the present invention, the oil phase contains the components (B) to (E) used in the present invention as essential components, as well as oil-soluble components and oil-dispersible components used in ordinary cosmetics. can contain ingredients.
  • oil-soluble components and oil-dispersible components that can be blended include organic UV absorbers, solid oils, lipophilic nonionic surfactants with an HLB value of 8 or less other than component (D), oil-soluble resins, and oils.
  • oil-soluble active ingredients such as soluble antioxidants, oil-soluble vitamins and oil-soluble extracts of animals and plants, and powders other than the component (B).
  • Organic UV absorbers are more likely to irritate the skin than inorganic microparticle powders, so when blending organic UV absorbers, the total content of the cosmetic should be 4% by mass or less, particularly 3% by mass or less. is preferred, and most preferred is not to be blended.
  • Powders other than component (B) include inorganic powders such as pigment-grade titanium oxide, iron oxide, talc and mica; organic powders such as polymer powders and metal soaps; pigment powders such as tar pigments. powders, metal powders: composite powders, etc., and the storage stability and It is preferable from the viewpoint of usability.
  • the content of the oil phase is preferably 20 to 70% by mass, more preferably 25 to 60% by mass, still more preferably 25 to 60% by mass, based on the total amount of the sunscreen cosmetic. is 30 to 50% by mass. If the oil phase content is too low, the inorganic powder cannot be contained in a large amount, resulting in poor sunscreen effect. If the oil phase content is excessively high, the product lacks freshness, gives a sticky feeling during use, and deteriorates storage stability.
  • the aqueous phase contains water-soluble and water-dispersible components commonly used in cosmetics, in addition to the water-based polymer (A) component and water (F) component. be able to.
  • water-soluble or water-dispersible ingredients that can be blended include lower alcohols, polyhydric alcohols, water-soluble polymers other than component (A), hydrophilic nonionic surfactants, water-soluble vitamins, and water-soluble animals and plants.
  • Water-soluble active ingredients such as extracts, pH adjusters, chelating agents, water-soluble antioxidants, water-soluble antibacterial agents, and the like.
  • the water phase preferably contains a hydrophilic surfactant as the (G) component.
  • a hydrophilic surfactant By containing a hydrophilic surfactant, an oil-in-water emulsified type is easily obtained stably.
  • hydrophilic surfactants include anionic surfactants, amphoteric surfactants, nonionic surfactants with an HLB value greater than 8.
  • anionic surfactants include higher fatty acid salts such as sodium stearate, acylated amino acid salts such as sodium stearoyl glutamate and sodium lauroylglycine, alkyl ether carboxylates, and alkyl sulfates.
  • amphoteric surfactants include aminoacetic acid betaine type amphoteric surfactants such as lauryl betaine, aminopropionic acid type amphoteric surfactants such as lauramidopropyl betaine, and sulfobetaine type amphoteric surfactants such as laurylhydroxysultaine. agents and the like.
  • nonionic surfactants with an HLB value exceeding 8 include polyglycerol fatty acid esters such as polyglyceryl-10 laurate, polyglyceryl-10 myristate, and polyglyceryl-10 oleate; PEG-60 hydrogenated castor oil, etc.
  • Polyoxyethylene hydrogenated castor oil Polyoxyethylene fatty acid ester such as PEG-10 oleate; Polyoxyethylene fatty acid glyceryl such as PEG-15 glyceryl oleate; Polyoxyethylene alkyl ether; Fatty acid polyoxyethylene alkyl ether; sorbitan fatty acid esters; polyoxyethylene-polyoxypropylene copolymers; ethers of polyoxyethylene-polyoxypropylene copolymers and long-chain alcohols; ethers of polybutylene glycol-polyglycerin copolymers and long-chain alcohols;
  • nonionic surfactants having an HLB value of more than 8 are preferably used.
  • Castor oil is preferably used.
  • hydrophilic surfactant When using a hydrophilic surfactant, its content is preferably 0.1 to 3% by mass with respect to the entire cosmetic. When the hydrophilic surfactant is contained, the stability of the emulsion is improved, but when the content is excessively large, the water resistance of the coating film is lowered.
  • the water phase preferably contains a polyhydric alcohol as the (H) component.
  • a polyhydric alcohol By containing a polyhydric alcohol, the moisturizing property of the skin is enhanced, and an oil-in-water emulsified type is easily obtained stably.
  • polyhydric alcohols include glycerin, diglycerin, propylene glycol (cosmetics labeling name: PG), dipropylene glycol (cosmetics labeling name: DPG), propanediol, butylene glycol (cosmetics labeling name: BG), sorbitol, xylitol, Polyethylene glycol etc. are mentioned.
  • the preferred content of component (H) is 2 to 30% by mass.
  • water-soluble polymers other than component (A) include carboxyvinyl polymer, sodium polyacrylate, alkyl acrylate/methacrylate copolymer, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, guar gum, carrageenan, xanthan gum, pullulan, and the like. mentioned.
  • nonionic water-soluble polymers such as xanthan gum, hydroxyethylcellulose, hydroxypropylmethylcellulose, and pullulan are preferably used because they are less susceptible to polyvalent metal ions derived from the essential component fine metal oxides.
  • Fine inorganic powder may be contained in the aqueous phase as long as the effects of the present invention are not essentially impaired. As compared with the case where the oil phase contains the same amount of fine metal oxide particles, it tends to agglomerate on the skin. Therefore, when the aqueous phase contains fine particle inorganic powder, the content thereof is 5% by mass or less, preferably 1% by mass or less, relative to the total cosmetic composition. It is particularly preferred that the
  • the content of the aqueous phase is preferably 30 to 80% by mass, more preferably 40 to 75% by mass, and still more preferably 50% by mass, based on the total amount of the cosmetic. ⁇ 70% by mass. If the water phase content is too low, it lacks freshness and gives a sticky feeling when used, and the storage stability is also lowered. As a result, the sunscreen effect decreases.
  • the emulsified cosmetic composition of the present invention can be prepared according to a conventional method.
  • an oil phase containing components (B) to (D) and an aqueous phase containing component (A) are prepared respectively, and the oil phase is added to the aqueous phase or the aqueous phase is added to the oil phase to emulsify while stirring. , can be prepared.
  • Preparation by adding the oil phase to the water phase makes it easier to obtain an emulsion with excellent storage stability than in the case of vice versa.
  • the aqueous phase contains (G) a hydrophilic surfactant and (H) a polyhydric alcohol
  • a mixture called a D phase (surfactant phase) containing these is formed in advance, and then stirred. It can be prepared by gradually adding an oil phase to form a gel emulsion (O/D phase) and then adding a water phase to form an oil-in-water emulsion (hereinafter referred to as D phase emulsification method).
  • D phase emulsification method When produced by the D-phase emulsification method, a stable emulsion with a small particle size can be obtained, and a cosmetic that has good spreading and spreadability on the skin and gives a fresh touch can be efficiently obtained.
  • the (G) component and the (H) component are mixed in advance to prepare the D phase. In the invention those amounts are treated as part of the amount of the aqueous phase.
  • the oil-in-water sunscreen cosmetic of the present invention may be in any form of cream, gel, milky lotion, or liquid (thin milky lotion).
  • This cosmetic can be used not only as a sunscreen cosmetic, but also as other cosmetic having an ultraviolet shielding effect.
  • Specific examples of other cosmetics include makeup cosmetics such as foundations and primers, skin care cosmetics such as emulsions, creams, serums, BB creams and CC creams, and hair cosmetics.
  • the present invention will be described in more detail below with examples and comparative examples, but the present invention is not limited by these examples.
  • the compounding amount in the formulations below is % by mass based on the total amount.
  • evaluation methods a to c For the following evaluation items a to c, 10 evaluators applied each sample to the face and performed a four-level sensory evaluation based on the following scoring criteria (scores).
  • Examples 1-3 and Comparative Examples 1-8 ⁇ Sunscreen lotion>
  • the sunscreen emulsions shown in Table 1 were prepared according to the following production procedure (Phase D emulsification method) and evaluated by the evaluation method described above. The results are also shown in Table 1.
  • 1.00% of polyglyceryl laurate (component number 15) which is a hydrophilic surfactant, was used in the preparation of the oil phase, but when the emulsion was prepared, lauric acid Since polyglyceryl-10 is not believed to be present in the oil phase, its amount is treated as part of the water phase amount.
  • (1) Mix ingredients 1-3 to prepare Phase D (a).
  • Components 4 to 15 are mixed to prepare oil phase (b).
  • Components 16-22 are mixed to prepare an aqueous phase (c).
  • the oil phase (b) is mixed little by little with the D phase (a) to prepare the O/D phase (e) of the gel emulsion.
  • the above O/D phase (e) is mixed with the above aqueous phase (c) to prepare a cosmetic.
  • the oil-in-water sunscreen cosmetic of the present invention was excellent in terms of spreadability, freshness, absence of whitening, and storage stability (Examples 1 to 3).
  • the oil phase contains no polyglycerin fatty acid ester with an HLB value of 5 to 8 as the component (D) (Comparative Example 1), and a polyoxyethylene fatty acid ester with an HLB value of 7 is used instead of the component (D).
  • Comparative Examples 4 and 5 in which polyhydroxystearic acid as component (C) was replaced with other dispersants such as sorbitan sesquiisostearate and PEG-10 dimethicone, were inferior in terms of spreadability and freshness. , the viscosity stability was also not satisfactory. Furthermore, when titanium oxide hydrophobized with hydrogen dimethicone is used as the fine particle inorganic powder, there is a problem with emulsion stability, and the spreadability, freshness, and lack of whitening are also insufficient. (Comparative Example 6). When the zinc oxide particles were dispersed in the aqueous phase, the freshness was poor and whiteness was conspicuous (Comparative Example 7). When the proportion of component (B) in the oil phase was low, the freshness was poor (Comparative Example 8).
  • Example 4 ⁇ Makeup base> A makeup base having the formulation shown in Table 2 was prepared by the same manufacturing procedure (D-phase emulsification method) as described above, and evaluated by the evaluation method described above. The results are shown in Table 2 together with the formulation. Incidentally, component numbers 6 to 9 in Table 2 are pigments for coloring.
  • Example 4 As is clear from the results in Table 2, the makeup base of Example 4 was excellent in terms of spreadability, freshness, absence of whitening, and storage stability.
  • an oil-in-water cosmetic suitable as a sunscreen cosmetic which is excellent in sunscreen effect, feeling in use and storage stability.

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Abstract

La présente invention concerne une composition cosmétique en émulsion huile dans eau qui contient : 0,1 à 3 % en masse de (A) un polymère aqueux qui contient, en tant qu'unité constitutive, de l'acide 2-acrylamido-2-méthylpropane sulfonique ou un sel de celui-ci ; 10 à 40 % en masse de (B) un agent de diffusion des ultraviolets qui est composé d'une poudre inorganique qui est rendue hydrophobe par un trialcoxyalkylsilane ; 0,1 à 5 % en masse de (C) un acide polyhydroxystéarique ; 0,1 à 5 % en masse de (D) un ester d'acide gras de polyglycérol qui a une valeur HLB de 5 à 8 ; 7 à 40 % en masse de (E) une huile liquide ; et 30 à 80 % en masse d'eau (F). Cette composition cosmétique en émulsion huile dans eau est une émulsion dans laquelle des phases huileuses qui contiennent les composants (B) à (E) sont dispersées dans une phase aqueuse qui contient les composants (A) et (F) ; et la teneur du composant (B) dans les phases huileuses est de 40 à 70 % en masse. Cette composition cosmétique en émulsion huile dans eau peut également contenir (G) un tensioactif hydrophile et (H) un polyol.
PCT/JP2022/013804 2021-04-17 2022-03-24 Composition cosmétique en émulsion huile dans eau WO2022220047A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014080377A (ja) * 2012-10-12 2014-05-08 Kose Corp 水中油型乳化化粧料
JP2016074660A (ja) * 2014-10-08 2016-05-12 堺化学工業株式会社 水中油型乳化化粧料及びその製造方法
JP2016135751A (ja) * 2015-01-23 2016-07-28 株式会社コーセー 水中油型乳化化粧料
CN109512684A (zh) * 2018-12-29 2019-03-26 浙江大学华南工业技术研究院 一种高含量二氧化钛或氧化锌的防晒剂及其制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014080377A (ja) * 2012-10-12 2014-05-08 Kose Corp 水中油型乳化化粧料
JP2016074660A (ja) * 2014-10-08 2016-05-12 堺化学工業株式会社 水中油型乳化化粧料及びその製造方法
JP2016135751A (ja) * 2015-01-23 2016-07-28 株式会社コーセー 水中油型乳化化粧料
CN109512684A (zh) * 2018-12-29 2019-03-26 浙江大学华南工业技术研究院 一种高含量二氧化钛或氧化锌的防晒剂及其制备方法

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