Classifications

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  • 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
  • A61K8/73—Polysaccharides
  • A61K8/732—Starch; Amylose; Amylopectin; Derivatives thereof
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  • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
  • A61K8/064—Water-in-oil emulsions, e.g. Water-in-silicone emulsions
• • A—HUMAN NECESSITIES
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  • A61K8/0241—Containing particulates characterized by their shape and/or structure
• • A—HUMAN NECESSITIES
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  • A61K8/04—Dispersions; Emulsions
  • A61K8/06—Emulsions
  • A61K8/062—Oil-in-water emulsions
• • A—HUMAN NECESSITIES
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  • A61K8/25—Silicon; Compounds thereof
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  • 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
  • A61K8/35—Ketones, e.g. benzophenone
• • A—HUMAN NECESSITIES
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  • 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
• • A—HUMAN NECESSITIES
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  • 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
  • A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
• • A—HUMAN NECESSITIES
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  • 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
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  • 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
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  • 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
  • A61K8/375—Esters of carboxylic acids the alcohol moiety containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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  • 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
• • A—HUMAN NECESSITIES
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  • 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
  • A61K8/46—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur
  • A61K8/466—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing sulfur containing sulfonic acid derivatives; Salts
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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  • 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
  • A61K8/494—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with more than one nitrogen as the only hetero atom
  • A61K8/4966—Triazines or their condensed derivatives
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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  • 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
  • A61K8/60—Sugars; Derivatives thereof
• • 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
  • A61K8/60—Sugars; Derivatives thereof
  • A61K8/602—Glycosides, e.g. rutin
• • 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
  • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
  • A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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  • 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
  • A61K8/89—Polysiloxanes
  • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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  • 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
  • A61K8/89—Polysiloxanes
  • A61K8/895—Polysiloxanes containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone
• • 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
  • A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
• • 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
  • A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
  • A61K8/922—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof of vegetable origin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
  • A61K8/965—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution of inanimate origin
• • 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
  • A61K2800/41—Particular ingredients further characterized by their size
  • A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
• • 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
  • A61K2800/48—Thickener, Thickening system

Definitions

• the present invention relates to a water-in-oil emulsified cosmetic. More specifically, the present invention relates to a water-in-oil emulsified cosmetic in which the ultraviolet protection effect is remarkably improved by blending a predetermined amount of a nonvolatile polar oil and an oil phase thickener.
• Sunscreen cosmetics a type of UV care cosmetics, absorb or scatter UVA and UVB on the skin by covering the skin with a coating film containing a UV absorber or UV scattering agent. It is a cosmetic intended to suppress the amount of ultraviolet rays to reach and protect the skin from the harm of ultraviolet rays (Non-patent Document 1).
• an ultraviolet absorber that chemically absorbs ultraviolet rays and an ultraviolet scattering agent that physically reflects / scatters ultraviolet rays are appropriately combined. It is widely done to blend.
• ultraviolet scattering agents typified by titanium oxide and zinc oxide also scatter visible light in addition to ultraviolet rays. Therefore, when applied to the skin, so-called “white floating” tends to occur, and the appearance tends to be conspicuous white. In addition, when these surfaces are hydrophobized, they have problems such as poor cleaning properties.
• zinc oxide gives the skin a dry feeling due to its astringent action, which may impair the feeling of use.
• An object of the present invention is to provide a water-in-oil emulsified cosmetic that can exhibit a sufficiently high ultraviolet protection effect without substantially adding an ultraviolet scattering agent.
• the present inventors have used an ultraviolet absorber in combination with a predetermined amount of a non-volatile polar oil and an oil phase thickener, thereby blending an ultraviolet scattering agent. It has been found that a high UV protection effect can be obtained even if the amount is reduced or not added, and the present invention has been completed.
• the present invention (A) 6 to 40% by mass of an ultraviolet absorber, (B) a non-volatile polar oil having an ester bond of 15% by mass or more (however, (A) the UV absorber is not included), and (C) A water-in-oil emulsified cosmetic containing 0.5 to 15% by mass of an oil phase thickener is provided.
• an excellent ultraviolet protection effect can be obtained without substantially adding an ultraviolet scattering agent by adopting the above configuration. For this reason, it is possible to provide a cosmetic material having no whitening and excellent versatility.
• the water-in-oil emulsified cosmetic of the present invention is characterized by containing (A) an ultraviolet absorber, (B) a non-volatile polar oil component, and (C) an oil phase thickener.
• A an ultraviolet absorber
• B a non-volatile polar oil component
• C an oil phase thickener
• the (A) ultraviolet absorber (hereinafter sometimes simply referred to as “component (A)”) blended in the water-in-oil emulsified cosmetic according to the present invention is one that is usually blended in sunscreen cosmetics. Can be used.
• the ultraviolet absorber is not particularly limited, and specific examples thereof include ethylhexyl methoxycinnamate, octocrylene, 2-hydroxy-4-methoxybenzophenone, dimethicodiethylbenzalmalonate, t-butylmethoxy Organic UV absorption such as dibenzoylmethane, ethylhexyltriazone, hexyl diethylaminohydroxybenzoylbenzoate, bisethylhexyloxyphenol methoxyphenyltriazine, methylenebisbenzotriazolyltetramethylbutylphenol, phenylbenzimidazolesulfonic acid, homosalate, ethylhexyl salicylate, etc. An agent can be mentioned.
• the blending amount of the component (A) is 6 to 40% by mass, more preferably 8 to 35% by mass, and further preferably 10 to 30% by mass with respect to the total amount of the water-in-oil emulsified cosmetic. If the blending amount of component (A) is less than 6% by mass, it is difficult to obtain a sufficient UV protection effect, and even if it exceeds 40% by mass, an increase in UV protection effect commensurate with the blending amount cannot be expected. Is not preferable from the viewpoint of worsening.
• a component may be used individually by 1 type and may use 2 or more types together.
• the (B) non-volatile polar oil blended in the water-in-oil emulsified cosmetic according to the present invention (hereinafter sometimes simply referred to as “component (B)”) is at room temperature (25 ° C.) and normal pressure (1 Polar ester oil that does not exhibit volatility at atmospheric pressure (9.8 ⁇ 10 4 Pa) (for example, contains oil having a boiling point of about 200 ° C. or higher at normal pressure) and has fluidity at normal temperature and pressure It is.
• the “polar oil” is not particularly limited as long as it has a high polarity among oils generally used in cosmetics.
• an oil having a relative dielectric constant of about 5 or more, preferably about 10 or more is used.
• ultraviolet absorbers Preferably used.
• some of the above (A) ultraviolet absorbers have an ester bond and are non-volatile and polar, but such ultraviolet absorbers are treated as the component (A) in the present invention, and (B ) Ingredients shall not be included.
• non-volatile polar oils include diisopropyl sebacate, isopropyl myristate, glyceryl tri-2-ethylhexanoate, cetyl 2-ethylhexanoate, tripropylene glycolineopentanoate, isononyl isononanoate, cetyl octoate Octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, 12 -Cholesteryl hydroxy stearate, ethylene glycol di-2-ethylhexanoate, dipentaerythrito
• the compounding quantity of a component is 15 mass% or more with respect to the water-in-oil type emulsified cosmetics whole quantity, More preferably, it is 18 mass% or more, More preferably, it is 20 mass% or more.
• the blending amount of the component (B) is less than 15% by mass, the ultraviolet protection effect cannot be sufficiently improved.
• the component (B) is highly blended, the feeling of use and water resistance tend to be impaired. Therefore, it is preferably 70% by mass or less, more preferably 50% by mass or less.
• a component may be used individually by 1 type and may use 2 or more types together.
• the (C) oil phase thickener (hereinafter sometimes simply referred to as “component (C)”) blended in the water-in-oil emulsified cosmetic according to the present invention is an oil of a water-in-oil emulsified cosmetic.
• the viscosity of the phase can be adjusted.
• component (C) dextrin fatty acid ester, sucrose fatty acid ester, fatty acid or salt thereof, vegetable hardened oil or solid or semi-solid vegetable oil, organically modified clay mineral, glyceryl fatty acid ester, and amino acid gelling agent preferable.
• the dextrin fatty acid ester is an ester of dextrin or reduced dextrin and a higher fatty acid, and can be used without particular limitation as long as it is generally used in cosmetics. It is preferable to use dextrin or reduced dextrin having an average sugar polymerization degree of 3 to 100.
• the constituent fatty acid of the dextrin fatty acid ester it is preferable to use a saturated fatty acid having 8 to 22 carbon atoms. Specific examples include dextrin palmitate, dextrin oleate, dextrin stearate, dextrin myristate, dextrin (palmitic acid / 2-ethylhexanoic acid), and the like.
• sucrose fatty acid ester a linear or branched fatty acid saturated or unsaturated fatty acid having 12 to 22 carbon atoms can be preferably used. Specifically, sucrose caprylate, sucrose caprate, sucrose laurate, sucrose myristic ester, sucrose palmitate, sucrose stearate, sucrose oleate, sucrose elca An acid ester etc. can be mentioned.
• the fatty acid can be used at room temperature, and examples thereof include myristic acid, palmitic acid, stearic acid, and behenic acid.
• Examples of fatty acid salts include calcium salts, magnesium salts, aluminum salts, and the like.
• Plant hardened oils include palm kernel hardened oil, hardened castor oil, hydrogenated peanut oil, hydrogenated rapeseed seed oil, hydrogenated palm oil, hydrogenated camellia oil, hydrogenated soybean oil, hydrogenated olive oil, hydrogenated macadamia nut oil, Examples thereof include hydrogenated sunflower oil, hydrogenated wheat germ oil, hydrogenated rice germ oil, hydrogenated rice nutka oil, hydrogenated cottonseed oil, and hydrogenated avocado oil.
• solid or semi-solid vegetable oil can also be used at room temperature similarly to vegetable hardened oil.
• a solid oil means an oil that is solid at 25 ° C.
• a semi-solid oil means an oil that is half solid at 25 ° C. More specifically, the melting point is in the range of 44 ° C.
• the viscosity measured at 25 ° C. with a B-type viscometer is 5000 mPa ⁇ s or more, more preferably 10,000 mPa ⁇ s or more.
• vegetable oils that are solid or semisolid at room temperature include cocoa butter, coconut oil, palm oil, palm kernel oil, owl, shea butter, and the like.
• the organically modified clay mineral is a kind of colloidal hydrous aluminum silicate having a three-layer structure.
• natural or synthetic montmorillonite group such as montmorillonite, saponite, hectorite (in this case, (OH) group in the formula is replaced with fluorine)
• montmorillonite group such as montmorillonite, saponite, hectorite (in this case, (OH) group in the formula is replaced with fluorine)
• commercially available products include bee gum, kunipia, laponite, etc.
• clay minerals such as sodium silicic mica and synthetic mica known as sodium or lithium teniolite (commercially available is Dimonite: Topy Industries Co., Ltd.) with quaternary ammonium salt type cationic surfactant Is obtained.
• the quaternary ammonium salt type cationic surfactant used here is represented by the following general formula (2).
• R 1 is an alkyl group having 10 to 22 carbon atoms or benzyl group
• R 2 is a methyl group or alkyl group having 10 to 22 carbon atoms
• R 3 and R 4 are alkyl groups having 1 to 3 carbon atoms or hydroxy group
• X represents a halogen atom or a methyl sulfate residue.
• Examples of the quaternary ammonium salt type cationic surfactant include dodecyltrimethylammonium chloride, myristyltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, aralkyltrimethylammonium chloride, behenyltrimethylammonium chloride, myristyldimethylethylammonium.
• Chloride cetyldimethylethylammonium chloride, stearyldimethylethylammonium chloride, aralkyldimethylethylammonium chloride, behenyldimethylethylammonium chloride, myristyldiethylmethylammonium chloride, cetyldiethylmethylammonium chloride, stearyldiethylmethylammonium chloride, ara Rudiethylmethylammonium chloride, behenyldiethylmethylammonium chloride, benzyldimethylmyristylammonium chloride, benzyldimethylcetylammonium chloride, benzyldimethylstearylammonium chloride, benzyldimethylbehenylammonium chloride, benzylmethylethylcetylammonium chloride, benzylmethylethylstearylammonium chloride, benzyldi
• Typical organically modified clay minerals include dimethyl distearyl ammonium hectorite (distearyl dimonium hectorite), dimethyl alkyl ammonium hectorite, benzyl dimethyl stearyl ammonium hectorite, distearyl dimethyl ammonium chloride treated aluminum magnesium silicate. Etc. Of these, dimethyl distearyl ammonium hectorite is particularly preferable. Benton 27 (benzyldimethylstearylammonium chloride-treated hectorite: manufactured by Elementis Japan) and Benton 38 (distearyldimethylammonium chloride-treated hectorite: manufactured by Elementis Japan) are preferable as commercial products.
• the glyceryl fatty acid ester is an esterification reaction product obtained by reacting glycerin, a dibasic acid having 18 to 28 carbon atoms and a fatty acid having 8 to 28 carbon atoms (excluding dibasic acid).
• glycerin a dibasic acid having 18 to 28 carbon atoms
• a fatty acid having 8 to 28 carbon atoms excluding dibasic acid.
• it can be used without any particular limitation. Specific examples include (behenic acid / isostearic acid / eicosanedioic acid) glyceryl, (behenic acid / eicosanedioic acid) glyceryl, (behenic acid / eicosanedioic acid) polyglyceryl-10, and the like.
• amino acid gelling agent examples include dibutyl lauroyl glutamide, dibutyl ethyl hexanoyl glutamide, polyamide-8, polyamide-3, N-lauroyl-L-glutamic acid dibutylamide and the like.
• the amount of component (C) is preferably 0.5 to 15% by mass, more preferably 1 to 10% by mass, and more preferably 1 to 8% by mass with respect to the total amount of the water-in-oil emulsified cosmetic. .
• the blending amount of the component (C) is less than 0.5% by mass, the UV protection effect cannot be sufficiently improved.
• the blending amount exceeds 15% by mass, the viscosity becomes high and the elongation on the skin becomes heavy. It is not preferable in terms of usability.
• (C) component may be used individually by 1 type, and may use 2 or more types together.
• two or more oil phase thickeners are blended, and one of them is preferably an organically modified clay mineral.
• the water-in-oil emulsified cosmetic of the present invention can improve the ultraviolet protection effect by containing the components (A) to (C).
• (D) a powder having an average particle diameter of 15 ⁇ m or less (hereinafter simply referred to as “component (D)”) It is preferable to further blend.
• component (D) an ultraviolet protective effect equivalent to or higher than that when blending an ultraviolet scattering agent can be obtained.
• Component (D) has an average particle size of 15 ⁇ m or less, more preferably 12 ⁇ m or less.
• the lower limit of the average particle diameter is not particularly limited, but is preferably 3 ⁇ m or more for reasons such as poor handling.
• the average particle diameter can be measured by a laser diffraction scattering method.
• the component (D) used in the present invention is the following types (i) to (iv): (I) talc, (Ii) silicone powder, (Iii) cross-linked polymethyl methacrylate powder, (Iv) It is preferable to select from silica.
• Talc Talc is a silicate clay mineral and is widely used as an extender pigment in cosmetics along with mica and sericite.
• a hydrophobized talc having talc as a base material and a hydrophobized surface thereof is particularly preferable.
• the hydrophobizing treatment is not particularly limited.
• silicone treatment silicone oil such as methylhydrogenpolysiloxane, dimethylpolysiloxane, methylphenylpolysiloxane; methyltrimethoxysilane, ethyltrimethoxysilane, hexyltri Alkyl silanes such as methoxysilane and octyltrimethoxysilane; treatment with fluoroalkylsilanes such as trifluoromethylethyltrimethoxysilane and heptadecafluorodecyltrimethoxysilane), fatty acid treatment (palmitic acid, isostearic acid, stearic acid, laurin) Acid, myristic acid, behenic acid, oleic acid, rosin acid, treatment with 12-hydroxystearic acid, etc.), fatty acid soap treatment (aluminum stearate, calcium stearate, 12- Treatment with mud carboxymethyl stearic acid, etc.
• hydrophobizing treatments can be performed according to conventional methods.
• the silicone treatment is preferable from the viewpoint that high stability can be imparted to the powder particles.
• a commercially available product can be used as the hydrophobized talc, and examples thereof include “calcium stearate treated talc” (manufactured by Fujimoto Chemical Co., Ltd.).
• Silicone powder As the silicone powder, those usually used as cosmetic raw materials can be used.
• the silicone powder for example, methylpolysiloxane network polymer, cross-linked methylpolysiloxane, cross-linked silicone network type silicone block copolymer, silylated silica, and the like are known. A reticulated silicone block copolymer is preferred.
• silicone powders examples include “KSP-100” (manufactured by Shin-Etsu Chemical Co., Ltd., (vinyl dimethicone / methicone silsesquioxane) cross polymer, average particle size: 5 ⁇ m).
• crosslinkable polymethylmethacrylate powder As the crosslinkable polymethylmethacrylate powder (PMMA powder), those usually used as cosmetic raw materials can be used as long as the average particle size is 15 ⁇ m or less.
• a commercially available product can be used as the crosslinked polymethylmethacrylate powder, and examples thereof include “Gantz Pearl” (manufactured by Aika Kogyo Co., Ltd., average particle size: 8 ⁇ m).
• Silica Silica (anhydrous silicic acid) can be used as a raw material for cosmetics regardless of whether it is porous or non-porous.
• Commercially available products include, for example, “Sunsphere H-31” (manufactured by AGC S-Itech Co., Ltd.) (average particle size: 3 ⁇ m), “Sunsphere H-51” (manufactured by AGC S-Itech Co., Ltd.) (average particle size: 5 ⁇ m). ), “Sunsphere H-121” (manufactured by AGC S-Tech Co., Ltd.) (average particle size: 12 ⁇ m).
• silica whose surface has been hydrophobized, such as dimethylsilylated silicic anhydride, trimethylsilylated silicic anhydride, etc. can also be used.
• the component (D) selected from the above (i) to (iv) may be used alone or in combination of two or more.
• the amount of component (D) is not particularly limited, but is preferably 1 to 30% by mass, more preferably 1 to 25% by mass, and more preferably 1 to 20% by mass with respect to the total amount of the water-in-oil emulsified cosmetic. %.
• the blending amount of the component (D) is less than 1% by mass, the effect of the component (D) tends to be insufficient, and when blending exceeds 30% by mass, the usability is poor, such as squeezing, twisting and stickiness. Or formulation may be difficult.
• the water-in-oil emulsified cosmetic of the present invention can realize a sufficient ultraviolet protection effect by containing the above components (A) to (C) without blending an ultraviolet scattering agent.
• a small amount of an ultraviolet scattering agent may be added for the purpose of further improving the protective effect against ultraviolet rays.
• the total amount of water-in-oil emulsified cosmetic is 6 % Mass or less, preferably 5 mass% or less, more preferably 4 mass% or less, particularly preferably 3 mass% or less.
• the ultraviolet scattering agent that can be blended in the water-in-oil emulsified cosmetic of the present invention is not particularly limited, and an ultraviolet scattering agent usually used in cosmetics can be used.
• the ultraviolet light scattering agent include fine metal oxides such as zinc oxide, titanium oxide, iron oxide, cerium oxide, and tungsten oxide, and those obtained by subjecting these surfaces to various hydrophobic surface treatments.
• Hydrophobic surface treatment agents commonly used in the cosmetics field such as dimethicone, silicones such as alkyl-modified silicones, alkoxysilanes such as octyltriethoxysilane, dextrin fatty acid esters such as dextrin palmitate, stearic acid, etc. Can be used.
• water-in-oil emulsified cosmetic of the present invention in addition to the above essential components, components usually used in cosmetics, for example, oil, water, alcohols, surfactants, oily active agents, aqueous active agents, aqueous phases You may mix
• the surfactant that can be used in the present invention is a surfactant having an HLB of less than 8 in order to realize a water-in-oil type emulsified form, and a silicone surfactant is particularly preferable.
• the silicone surfactant having an HLB of less than 8 include polyoxyalkylene-modified silicone, polyoxyalkylene / alkyl co-modified silicone, polyglycerin-modified silicone, and / or polyglycerin / alkyl co-modified silicone. .
• KF-6017 PEG-10 dimethicone, manufactured by Shin-Etsu Chemical Co., Ltd.
• KF-6028 PEG-9 polydimethylsiloxyethyl dimethicone, manufactured by Shin-Etsu Chemical Co., Ltd.
• ABIL EM90 cetyl PEG / PPG.
• -10/1 dimethicone manufactured by Evonik Goldschmidt
• KF-6038 laauryl PEG-9 polydimethylsiloxyethyl dimethicone, manufactured by Shin-Etsu Chemical Co., Ltd.
• bisbutyl dimethicone polyglyceryl-3 and the like.
• the blending amount of the silicone surfactant is preferably 0.1 to 8% by mass, more preferably 0.2 to 7% by mass, and more preferably 0.4 to 8% by mass with respect to the total amount of the water-in-oil emulsified cosmetic. 5% by mass.
• the water-in-oil emulsified cosmetic of the present invention can be provided, for example, as a sunscreen cream, sunscreen emulsion, sunscreen lotion, as well as a foundation having a sunscreen effect, a makeup base, a makeup cosmetic, a hair cosmetic, etc. And can be produced by a conventional method.
• Examples 1 to 8 and Comparative Examples 1 to 3 A water-in-oil emulsified cosmetic having the composition listed in Tables 1 and 2 below is prepared by adding a separately mixed aqueous phase to a solution obtained by heating and dissolving an oily component to disperse a powder, followed by stirring treatment It was prepared by emulsifying.
• the absorbance (Abs) integrated value of the prepared cosmetic was measured by the following method to evaluate the ultraviolet protection effect.
• ⁇ Measurement of Absorbance (Abs) Integrated Value The cosmetic material (sample) of each example is dropped onto a measurement plate (S plate) (5 ⁇ 5 cm V-groove PMMA plate, SPFMASTER-PA01) in an amount of 2 mg / cm 2 , applied with a finger for 60 seconds, and dried for 15 minutes. Thereafter, the absorbance of the formed coating film was measured with a U-3500 self-recording spectrophotometer manufactured by Hitachi, Ltd.
• the absorbance (Abs) integrated value is remarkably improved by blending (B) the non-volatile polar oil so as to be 15% by mass or more with respect to the water-in-oil emulsified cosmetic. It was confirmed.
• the light absorbency (Abs) is obtained by blending (C) the oil phase thickener so as to be 0.5% by mass or more based on the water-in-oil emulsified cosmetic. It was confirmed that the integrated value improved.
• Example 9 to 10 and Comparative Example 4 A water-in-oil emulsified cosmetic having the composition listed in Table 3 below was prepared in the same manner as described above, and the in vitro SPF of the cosmetic was measured by the following method to evaluate the UV protection effect.
• ⁇ Measurement of in vitro SPF> The cosmetic material (sample) of each example is dropped onto a measurement plate (S plate) (5 ⁇ 5 cm V-groove PMMA plate, SPFMASTER-PA01) in an amount of 2 mg / cm 2 , applied with a finger for 60 seconds, and dried for 15 minutes. Then, in vitro SPF was measured with SPF MASTER (registered trademark) (manufactured by Shiseido Medical Rika Technology Co., Ltd.).

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• 2018
  • 2018-06-06 US US16/620,284 patent/US20210077365A1/en active Pending
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