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
  • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
  • A61K8/27—Zinc; Compounds 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
  • A61K8/63—Steroids; 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
  • A61K8/72—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
  • 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
• • 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
  • 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
  • A61K8/89—Polysiloxanes
• • 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
  • A61K8/89—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
  • 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
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q19/00—Preparations for care of the skin

Definitions

• the present invention relates to oil-in-water skin cosmetics.
• skin cosmetics containing an ultraviolet light scattering agent and an ultraviolet light absorbent for the purpose of a sunscreen effect are known.
• oil-in-water skin cosmetics are preferably used because they have a refreshing feeling of use.
• an ultraviolet light absorber it is preferable to add to the skin cosmetic.
• the ultraviolet absorber is generally an oil component having a relatively high polarity, and when these are blended, the particle diameter of the emulsified particles becomes large, and the coalescence of the emulsified particles tends to progress with time, and the skin There has been a problem that the storage stability of the cosmetic decreases.
• Patent Document 1 and Patent Document 2 In order to solve the problem of the above storage stability, it is known to incorporate a hydrophilic surfactant having a relatively high HLB (Patent Document 1 and Patent Document 2).
• a surfactant of about HLB 12 there is a problem that the water resistance is lowered, and the ultraviolet absorber tends to flow off due to water, sweat or the like.
• the hydrophilicity of the surfactant is too high, so that, for example, the surfactant does not orient at the oil-water interface, but the aqueous phase is not As a result, micelles are formed, and as a result, there is a problem that the emulsifying power is reduced, the united particles of the emulsified particles are easily caused, and the stability is reduced.
• Patent Document 3 oil-in-water emulsion type compositions containing high polarity oil have been used as skin cosmetics.
• high polar oils ester oils having a sterol skeleton have high skin care effects, and therefore skin cosmetics containing such ester oils are required.
• ester oils having a sterol skeleton have relatively high polarity, when they are blended, the particle size of the emulsified particles becomes large, and the coalescence of the emulsified particles tends to progress with time, and the storage stability of the skin cosmetic The problem of falling was occurring.
• An object of the present invention is to provide an oil-in-water type skin cosmetic which is excellent in stability even when it contains an ultraviolet light absorber and which is also excellent in water resistance.
• a further object of the present invention is to provide an oil-in-water type skin cosmetic which is excellent in stability even when it contains an ester oil having a sterol skeleton and which is also excellent in feeling in use.
• the present invention comprises the following component A, the following component B, the following component C and the following component D, and the content of the component B is 1.0 to 4.0 mass%,
• An oil-in-water that does not contain a nonionic surfactant having a HLB of 7.0 or more and less than 14.5 or a content of a nonionic surfactant having an HLB of 7.0 or more and less than 14.5 is 0.1% by mass or less It relates to skin cosmetics.
• Component A Component selected from the group consisting of the following component A1 and the following component A2
• Component A1 UV absorber
• Component A2 selected from the group consisting of cholesterol fatty acid ester, cholestanol fatty acid ester, phytosterol fatty acid ester and phytostanol fatty acid ester
• Component B nonionic surfactant having a polyoxyethylene chain having an HLB of 14.5 to 20.0
• Component C a polymer selected from the group consisting of the following component C1, the following component C2 and the following component C3 C1: Polymer containing a constituent unit derived from acryloyl dimethyl taurate
• Component C2 A constituent unit derived from (meth) acrylic acid and / or (meth) acrylic acid alkyl ester and (meth) acrylic acid polyoxyethylene alkyl ether At least the constituent units from which Polymer which also contains Component C3: alkyl modified carboxyvinyl polymer
• Component D water
• the oil-in-water type skin cosmetic composition of the present invention exhibits the effect of being excellent in stability and also excellent in water resistance although it contains the ultraviolet light absorber of component A1. Furthermore, although the oil-in-water skin cosmetic composition of the present invention contains an ester oil having a sterol skeleton of component A2, it exhibits an effect of being excellent in stability and also excellent in feeling in use.
• the oil-in-water skin cosmetic composition of the present invention is an oil-in-water (O / W) type emulsion composition.
• the oil-in-water skin cosmetic composition of the present invention comprises an oil agent selected from the group consisting of cholesterol fatty acid ester, cholestanol fatty acid ester, phytosterol fatty acid ester and phytostanol fatty acid ester, and a component selected from the group consisting of UV absorbers.
• a component selected from the group consisting of an oil agent selected from the group consisting of cholesterol fatty acid ester, cholestanol fatty acid ester, phytosterol fatty acid ester and phytostanol fatty acid ester, and an ultraviolet light absorber "The said HLB is 14.5-20.0
• the nonionic surfactant which has a polyoxyethylene chain” component B " The polymer containing the structural unit derived from the said acryloyl dimethyl taurate, (meth) acrylic A polymer containing at least a constituent unit derived from an acid and / or a (meth) acrylic acid alkyl ester and a constituent unit derived from a (meth) acrylic acid polyoxyethylene alkyl ether, and an alkyl-modified carboxyvinyl polymer Polymer is added "The aqueous sometimes referred respectively to as” component D ".
• an oil agent selected from the group consisting of the above-mentioned ultraviolet light absorber “component A1”, the above-mentioned cholesterol fatty acid ester, cholestanol fatty acid ester, phytosterol fatty acid ester and phytostanol fatty acid ester “component A2”, the above acryloyl dimethyl taurate A polymer containing a constituent unit derived from “component C1”, a constituent unit derived from the (meth) acrylic acid and / or the (meth) acrylic acid alkyl ester, and a composition derived from the (meth) acrylic acid polyoxyethylene alkyl ether A polymer containing at least a unit may be referred to as "component C2”, and an alkyl-modified carboxyvinyl polymer may be referred to as "component C3".
• the oil-in-water type skin cosmetic composition of the present invention contains Component A, Component B, Component C and Component D as essential components.
• Component A is a component selected from the group consisting of component A1 and component A2.
• Component C is a polymer selected from the group consisting of component C1, component C2 and component C3.
• the oil-in-water skin cosmetic composition of the present invention preferably further contains zinc oxide as one embodiment.
• the above zinc oxide may be referred to as "component E”.
• the oil-in-water type skin cosmetic composition of the present invention preferably further contains dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 1.5 to 10.0 mm 2 / s.
• a dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 1.5 to 10.0 mm 2 / s may be referred to as “component F”.
• the oil-in-water skin cosmetic composition of the present invention may contain components other than the components A to F.
• the components other than the component A, the component B, the component C, the component D, the component E, the component F and the components A to F may be used alone or in combination of two or more.
• Component A is a component selected from the group consisting of component A1 and component A2.
• Component A may use only 1 type and may use 2 or more types.
• the component A may contain only the component A1, may contain only the component A2, or may contain the component A1 and the component A2.
• only about 1 type may be used also about each of component A1 and component A2, and 2 or more types may be used.
• Component A1 is a UV absorber. By blending the component A1, the ultraviolet light protective effect of the oil-in-water skin cosmetic preparation is obtained, and particularly the protective effect from ultraviolet light in a wide wavelength range is improved. Component A1 may use only 1 type, and may use 2 or more types.
• component A1 for example, 2-ethylhexyl paramethoxycinnamate, hexyl diethylaminohydroxybenzoylbenzoate, bisethylhexyl oxyphenol methoxyphenyl triazine, 4-tert-butyl-4'-methoxydibenzoylmethane, 2-hydroxy-4 -Methoxy benzophenone (oxybenzone-3) and the like.
• 2-ethylhexyl paramethoxycinnamate, hexyl diethylaminohydroxybenzoyl benzoate and bisethylhexyl oxyphenol methoxyphenyl triazine in combination from the viewpoint of enhancing the ultraviolet radiation protective effect, and particularly enhancing the protective effect against ultraviolet light in a wide wavelength range.
• Component A2 is an oil agent selected from the group consisting of cholesterol fatty acid ester, cholestanol fatty acid ester, phytosterol fatty acid ester and phytostanol fatty acid ester. Since component A2 is an intercellular lipid-like component, it is known to have skin care effects such as enhancing the barrier function of the skin, suppressing water evaporation from the inside of the skin, and enhancing the moisturizing power. Component A2 may use only 1 type, and may use 2 or more types.
• Examples of the component A2 include macadamia nut fatty acid phytosteryl, macadamia nut fatty acid cholesteryl, phytosteryl oleate, phytosteryl isostearate and the like.
• macadamia nut fatty acid phytosteryl and macadamia nut fatty acid cholesteryl are preferable from the viewpoint of skin care effect.
• the content of the component A in 100% by mass of the oil-in-water skin cosmetic of the present invention is preferably 5. from the viewpoint of enhancing the ultraviolet ray protective effect or the viewpoint of exhibiting the effect of improving the stability according to the present invention.
• it is preferably 30.0% by mass or less, more preferably 25.0% by mass or less, still more preferably 20.0% by mass or less, still more preferably 17.0% by mass % Or less.
• the content of component A is the total amount of all components A contained in the oil-in-water skin cosmetic of the present invention.
• Component A may be component A1 or may be component A2.
• the content of the component A1 in 100% by mass of the oil-in-water type skin cosmetic of the present invention is preferably 5.0% by mass or more from the viewpoint of enhancing the ultraviolet ray protection effect
• the content is preferably 8.0% by mass or more, and more preferably 10.0% by mass or more.
• the content is preferably 25.0% by mass or less. More preferably, it is 20.0 mass% or less, More preferably, it is 17.0 mass% or less.
• Component A is Component A2
• the content of Component A2 in 100% by mass of the oil-in-water type skin cosmetic composition of the present invention is preferable from the viewpoint that the effect of improving the stability according to the present invention is remarkably exhibited.
• Is preferably 5.0% by mass or more, more preferably 8.0% by mass or more, still more preferably 10.0% by mass or more, and from the viewpoint of forming a stable emulsion system, preferably 30. It is 0 mass% or less, more preferably 25.0 mass% or less, and further preferably 20.0 mass% or less.
• Component B is a nonionic surfactant having a polyoxyethylene chain, having an HLB of 14.5 to 20.0. It is one of the features of the present invention to improve the stability while suppressing stickiness in use of the oil-in-water skin cosmetic composition by using component B which is a specific nonionic surfactant. In addition, it is one of the features of the present invention that the water resistance is further improved as a feature that is particularly effective when the component A includes the component A1. For example, since the hydrophilic group of the known polyglycerin type nonionic surfactant is bulky (bulky) and the curvature of the oil-water interface is increased, the amount of oily components that can be incorporated into micelles decreases.
• the component B may use only 1 type and may use 2 or more types.
• Component B HLB Hydrophile Balance
• HLB Hydrophile Balance
• HLB of each component in this specification is calculated
• Component B is, for example, polyoxyethylene hydrogenated castor oil having an average addition mole number (E.O.) of oxyethylene of 80 to 100; an average addition mole number of oxyethylene is 20 to 160, and the carbon number of fatty acid is Examples thereof include polyoxyethylene sorbitan fatty acid ester having 12 to 18; polyoxyethylene fatty acid ester having an average added mole number of oxyethylene of 20 to 160 and carbon number of fatty acid of 12 to 18 and the like.
• E.O. average addition mole number
• Component B is, for example, polyoxyethylene hydrogenated castor oil having an average addition mole number (E.O.) of oxyethylene of 80 to 100; an average addition mole number of oxyethylene is 20 to 160, and the carbon number of fatty acid is Examples thereof include polyoxyethylene sorbitan fatty acid ester having 12 to 18; polyoxyethylene fatty acid ester having an average added mole number of oxyethylene of 20 to 160 and carbon number of fatty acid of 12 to 18 and the like.
• component B for example, polyoxyethylene sorbitan monoisostearate (E.O. 20
• the content of component B in 100% by mass of the oil-in-water skin cosmetic composition of the present invention is 1.0% by mass or more, preferably 1.5% by mass, from the viewpoint of the emulsifying properties and stability of emulsifying component A. From the viewpoint of suppressing stickiness and securing a refreshing feeling of use, it is 4.0% by mass or less, preferably 3.5% by mass or less.
• the content of component B is the total amount of all components B contained in the oil-in-water skin cosmetic composition of the present invention.
• Component C is a polymer selected from the group consisting of component C1, component C2 and component C3.
• component C which is a specific polymer.
• Component C may use only 1 type and may use 2 or more types.
• component C1, component C2, and component C3, only 1 type may be used and 2 or more types may be used.
• Component C1 is a polymer containing at least a constitutional unit (so-called monomer unit) derived from acryloyldimethyl taurate.
• the acryloyl dimethyl taurate include sodium acryloyl dimethyl taurate and the like.
• Component C1 may contain a constituent unit derived from a monomer component other than acryloyldimethyl taurate.
• monomer components other than acryloyl dimethyl taurate for example, (meth) acrylic acid such as acrylic acid; (meth) acrylic acid salt such as sodium acrylate; hydroxyl group-containing acrylic monomer such as hydroxyethyl acrylate; acrylic acid amide And amide group-containing acrylic monomers.
• component C1 is a polymer containing monomer units of acryloyl dimethyl taurate.
• component C1 for example, a copolymer of acrylic acid and acryloyldimethyl taurate, a copolymer of hydroxyethyl acrylate and acryloyl dimethyl taurate, a copolymer of acrylic acid and acrylate, acrylamide and acryloyl dimethyl taurate Etc.
• component C1 Commercial products of component C1 include, for example, SIMULGEL EG (trade name, manufactured by SEPPIC SA, (acrylic acid Na / acryloyldimethyltaurine Na) copolymer); SIMULGEL NS (trade name, manufactured by SEPPIC SA, (hydroxyethyl acrylate) (Acryloyldimethyltaurine Na) copolymer) and the like.
• SIMULGEL EG trade name, manufactured by SEPPIC SA, (acrylic acid Na / acryloyldimethyltaurine Na) copolymer
• SIMULGEL NS trade name, manufactured by SEPPIC SA, (hydroxyethyl acrylate) (Acryloyldimethyltaurine Na) copolymer
• Component C2 is a structural unit derived from (meth) acrylic acid and / or (meth) acrylic acid alkyl ester (monomer component (C2a)) and (meth) acrylic acid polyoxyethylene alkyl ether (monomer component (C2b)) And a polymer containing at least a structural unit derived from the polymer.
• a monomer component (C2b) methacrylic acid polyoxyethylene stearyl ether, methacrylic acid polyoxyethylene behenyl ether etc. are mentioned, for example.
• the average added mole number of oxyethylene in the monomer component (C2b) is preferably 15 to 30.
• component C2 may contain a constituent unit derived from a monomer component other than the monomer component (C2a) and the monomer component (C2b). That is, component C2 is a copolymer containing at least monomer units of monomer component (C2a) and monomer units of monomer component (C2b).
• component C2 for example, a copolymer of (meth) acrylic acid and / or (meth) acrylic acid alkyl ester and methacrylic acid polyoxyethylene stearyl ether, (meth) acrylic acid and / or (meth) acrylic acid alkyl ester and Copolymers with methacrylic acid polyoxyethylene behenyl ether and the like can be mentioned.
• component C2 examples include Accurin 22, Accurin 28, Accurin 88 (trade names, all manufactured by Dow Chemical Co.).
• Component C2 is preferably neutralized with a basic substance or neutralized with a basic substance and used.
• the basic substance in this case include alkanolamines such as triethanolamine and monoethanolamine; inorganic bases such as ammonia, sodium hydroxide and potassium hydroxide; and basic amino acids such as arginine.
• the amount of the basic substance added is such an amount that the component C2 is sufficiently neutralized, or an amount sufficient to neutralize the component C2, and the type of the component C2 and the above basic substance or the component C2 Depending on the amount of use, it may be blended appropriately.
• Component C3 is an alkyl modified carboxyvinyl polymer.
• the component C3 includes a compound represented by the INCI name “Acrylates / C10-30 Alkyl Acrylate Crosspolymer ((Acrylate / Alkyl Acrylate (C10-30)) Cross Polymer)”.
• Component C3 is also referred to as an acrylic acid / methacrylic acid alkyl copolymer.
• Commercially available products of component C3 include, for example, PEMULEN TR-1, PEMULEN TR-2, Carbopol ETD 2020, Carbopol ULTREZ 20, Carbopol ULTREZ 21 (trade names, all manufactured by Nippon Lubrizol), etc. .
• the content of the component C in 100% by mass of the oil-in-water type skin cosmetic of the present invention is preferably 0.1% by mass or more, more preferably Is 0.2% by mass or more, and on the other hand, it is preferably 3.0% by mass or less, more preferably 1.5% by mass or less from the viewpoint of suppressing the film feeling and securing a refreshing feeling of use It is more preferably 0.9% by mass or less.
• the content of component C is the total amount of all components C contained in the oil-in-water skin cosmetic preparation of the present invention.
• Ingredient D is water.
• Component D has a role as a medium for forming an oil-in-water emulsion system. By making the cosmetic an emulsion system, the freshness and emollient effect is exhibited.
• the content of component D in 100% by mass of the oil-in-water skin cosmetic composition of the present invention is preferably 30.0% by mass or more, more preferably 40.0% by mass or more, and contains other components. Preferably it is 90.0 mass% or less from a viewpoint, More preferably, it is 80.0 mass% or less.
• the content of component D in 100% by mass of the oil-in-water skin cosmetic composition of the present invention is preferably 30.0% by mass or more, more preferably 40.0% by mass or more, and contains other components. From the viewpoint, it is preferably 90.0% by mass or less, more preferably 80.0% by mass or less, and still more preferably 70.0% by mass or less.
• the oil-in-water skin cosmetic of the present invention does not contain a nonionic surfactant having an HLB of 7.0 or more and less than 14.5, or the HLB in 100% by mass of the oil-in-water skin cosmetic of the present invention is 7.
• Content of nonionic surfactant 0 or more and less than 14.5 is 0.1 mass% or less.
• the nonionic surfactant having an HLB of 7.0 or more and less than 14.5 is preferably not contained or the content thereof is 0.08 mass% or less, more preferably not contained or the content thereof is 0. It is 07 mass% or less.
• a nonionic surfactant having a HLB of 7.0 or more and less than 14.5 has a certain degree of lipophilicity, and therefore, it becomes easy to re-emulsify the water and the component A on the skin after the application of the skin cosmetic, so the component A is It becomes easy to run off and water resistance decreases. For this reason, the water resistance of the oil-in-water skin cosmetic composition becomes excellent by reducing the content of the nonionic surfactant as much as possible.
• the oil-in-water skin cosmetic composition of the present invention may or may not contain a nonionic surfactant having an HLB of less than 7.0.
• Nonionic surfactants having an HLB of less than 7.0 may be used, for example, as a dispersant.
• nonionic surfactants having an HLB of less than 7.0 do not contribute to re-emulsification of the component A because of their high lipophilicity, and do not reduce the water resistance of the oil-in-water skin cosmetic composition of the present invention.
• the content of the nonionic surfactant having an HLB of less than 7.0 in 100% by mass of the oil-in-water skin cosmetic of the present invention is preferably 2.0% by mass or less, more preferably 1.5% by mass or less is there. In addition, 0 mass% may be sufficient as the lower limit of content of nonionic surfactant whose HLB is less than 7.0.
• the oil-in-water skin cosmetic preparation of the present invention preferably further contains Component E (zinc oxide).
• Component E zinc oxide
• the oil-in-water skin cosmetic composition of the present invention preferably contains the component E.
• the ultraviolet light protective effect of the oil-in-water type skin cosmetic composition of the present invention particularly the protective effect against ultraviolet light in a wide wavelength range is further enhanced.
• Component E may be treated with a known surface treatment agent such as isostearic acid, isostearyl sebacate, dimethylpolysiloxane, methylhydrogenpolysiloxane and the like.
• the component E may use only 1 type and may use 2 or more types.
• the content of the component E in 100% by mass of the oil-in-water skin cosmetic of the present invention is preferably 5.0% by mass or more, more preferably 8.0% by mass or more, from the viewpoint of the ultraviolet light protective effect. More preferably 10.0% by mass or more, while the itching feeling (feeling like being caught when stroking the skin surface after application) and whitening (the phenomenon that the skin cosmetic on the skin looks white after application) From the viewpoint of suppressing), it is preferably 20.0% by mass or less, more preferably 18.0% by mass or less, and still more preferably 14.0% by mass or less.
• component C is preferably component C1 (that is, component C consists of component C1 only) from the viewpoint of emulsifying properties and stability. .
• component E and the component C2 or the component C3 are used in combination, the emulsifying power and stability may be reduced.
• the oil-in-water skin cosmetic of the present invention does not contain an ionic surfactant, or the content of the ionic surfactant in 100% by mass of the oil-in-water skin cosmetic of the present invention is 0.1% by mass It is preferable that it is the following. By reducing the content of the ionic surfactant as much as possible, the deposition of the component E can be further suppressed. Such an effect is more pronounced when component E is contained, so in the embodiment where the oil-in-water skin cosmetic composition of the present invention contains component E, it does not contain an ionic surfactant, or the content thereof Is more preferably 0.1% by mass or less.
• the ionic surfactant include anionic surfactants, cationic surfactants, and amphoteric surfactants.
• the oil-in-water skin cosmetic composition of the present invention preferably further comprises Component F (dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 1.5 to 10.0 mm 2 / s).
• Component F dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 1.5 to 10.0 mm 2 / s.
• the kinematic viscosity at 25 ° C. of the component F is more preferably 2.0 to 10.0 mm 2 / s.
• the component F may use only 1 type and may use 2 or more types.
• the content of Component F in 100% by mass of the oil-in-water skin cosmetic composition of the present invention is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, from the viewpoint of feeling in use.
• the content is more preferably 0.3% by mass or more, and from the viewpoint of skin familiarity, preferably 10.0% by mass or less, more preferably 8.0% by mass or less, and still more preferably 7.0% by mass. % Or less.
• the content of dimethylpolysiloxane having a kinematic viscosity at 25 ° C. of 2.0 to 10.0 mm 2 / s satisfies the above range.
• the content of component F is the total amount of all components F contained in the oil-in-water skin cosmetic preparation of the present invention.
• the oil-in-water skin cosmetic of the present invention preferably further contains an oil, from the viewpoint of making the dosage form an emulsion system.
• the oil may be used alone or in combination of two or more.
• oil examples include higher aliphatic alcohols, higher fatty acids, oils and fats, hydrocarbon oils, ester oils, silicone oils, waxes and the like. However, those corresponding to Component A and Component F are excluded from the oil solution.
• the oil agent is a C 12-24 monovalent branched chain aliphatic alcohol such as octyl dodecanol, decyl tetradecanol, isostearyl alcohol, etc .; a C 12-22 monovalent linear unsaturated fatty acid such as oleyl alcohol.
• the content of the oil in 100% by mass of the oil-in-water skin cosmetic of the present invention is preferably 2.0% by mass or more, more preferably 3.0% by mass or more from the viewpoint of functionality such as an emollient effect It is more preferably 5.0% by mass or more, and preferably 30.0% by mass or less, more preferably 25.0% by mass or less from the viewpoint of securing a refreshing feeling of use. Preferably it is 20.0 mass% or less.
• the content of the oil agent is the total amount of all the oil agents contained in the cosmetic of the present invention when a plurality of oil agents are used.
• the total amount of the content of component A and the content of the oil in 100% by mass of the oil-in-water skin cosmetic of the present invention is preferably 10.0% by mass or more from the viewpoint of functionality such as emollient effect,
• the content is more preferably 15.0% by mass or more, and preferably 35.0% by mass or less, and more preferably 30.0% by mass or less from the viewpoint of securing a refreshing feeling of use.
• the oil-in-water type skin cosmetic composition of the present invention may further optionally contain components other than the components A to F (other components).
• Other components include, for example, lower alcohols such as ethanol, polyhydric alcohols, powders, antioxidants, preservatives, fragrances, coloring agents, chelating agents, cooling agents, vitamins, neutralizing agents, amino acids, pH adjustment Additives such as agents, whitening agents, anti-inflammatory agents, deodorants, animal and plant extracts, sequestering agents, film forming agents and the like.
• the other components may be used alone or in combination of two or more.
• the oil-in-water skin cosmetic composition of the present invention may contain ethanol.
• the content of ethanol in 100% by mass of the oil-in-water skin cosmetic of the present invention is not particularly limited, but is preferably 1.0% by mass or more, and more preferably 2.
• the content is 0% by mass or more, and preferably 20.0% by mass or less, and more preferably 10.0% by mass or less from the viewpoint of irritation and emulsion stability.
• the oil-in-water skin cosmetic preparation of the present invention may contain a polyhydric alcohol.
• the polyhydric alcohol include glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, 1,2-butanediol, 1,2-pentanediol, 1,2-hexanediol, and 1,2-hexanediol.
• examples include octanediol, 1,2-decanediol, polyoxypropylene methyl glucoside and the like.
• the content of the polyhydric alcohol in 100% by mass of the oil-in-water skin cosmetic of the present invention is preferably 1.0% by mass or more, more preferably 2.0% by mass from the viewpoint of feeling in use and preservative property.
• the content is preferably 30.0% by mass or less, more preferably 20.0% by mass or less, and still more preferably 10.0% by mass or less.
• the pH of the oil-in-water skin cosmetic of the present invention is, for example, preferably 4.5 to 9.5, more preferably 5.0 to 9.0 at 25 ° C.
• the oil-in-water type skin cosmetic of the present invention includes, for example, sunscreen cosmetic, skin care cosmetic (moisturizing, makeup base, foundation, scalp care cosmetic, anti-aging cosmetic, body care cosmetic, whitening cosmetic etc.) Etc.
• the oil-in-water skin cosmetic preparation of the present invention may be, for example, any of cosmetics, quasi-drugs, medicines, and miscellaneous goods.
• the site to which the oil-in-water skin cosmetic of the present invention is applied includes the face (for example, forehead, eyes, eyes, eyes, cheeks, mouth, etc.), arms, elbows, back of hands, fingertips, feet, knees, heels, neck, sides, The back is mentioned.
• Examples of the method of preparing the oil-in-water skin cosmetic preparation of the present invention include a method of mixing the above-mentioned respective components and a known method, for example, a method of stirring using a homomixer.
• the oil-in-water skin cosmetic composition of the present invention contains an ultraviolet light absorber (component A1) and / or an ester oil (component A2) having a sterol skeleton.
• component A1 an ultraviolet light absorber
• component A2 an ester oil having a sterol skeleton
• the oil-in-water type skin cosmetic composition of the present invention can exert a protective effect against ultraviolet light particularly in a wide wavelength range by containing the ultraviolet light absorber (component A1).
• component A1 the ultraviolet light absorber
• surfactants are difficult to be distributed at the oil-water interface, and emulsification is difficult. It is possible to increase the emulsification power by using a large amount of surfactant of about HLB 12, but in this case, after application and drying of the oil-in-water skin cosmetic preparation, component A1 and water are likely to cause re-emulsification. Therefore, the water resistance is lowered, and the problem of the ultraviolet absorber being easy to flow off due to water, sweat or the like occurs.
• the component A1 is emulsified using a polyoxyethylene type nonionic surfactant (component B) having an HLB of 14.5 or more, substantially without using a surfactant of about HLB 12 It is the feature that it is doing.
• component B has high hydrophilicity, so when it comes in contact with water after application and drying of the oil-in-water skin cosmetic composition, micelles are easily formed only with component B, and component A1 is difficult to re-emulsify.
• Component B is different from other nonionic surfactants such as polyglycerin, the hydrophilic group is not relatively bulky, the curvature of the oil-water interface is small, and the density of the surfactant at the oil-water interface Becomes higher. For this reason, the emulsification power is high, and the emulsification stability is further enhanced.
• component B alone is insufficient to sufficiently enhance the emulsion stability. Therefore, in the present invention, by using a specific acrylic polymer (component C) having a relatively large hydrophobic group in combination, the polymers crosslink and further interact with the oil droplets to enhance the emulsion stability. There is.
• the present invention is presumed to be due to the above-mentioned action, but succeeded in achieving both the water resistance and the emulsion stability of the cosmetic containing the component A1 at a high level.
• the component A2 is a highly polar oil agent, so the surfactant is difficult to be distributed to the oil-water interface and emulsification is difficult. It is possible to increase the emulsifying power by using a large amount of surfactant of about HLB 12, but in this case, stickiness occurs and there is a problem that the feeling of use as a skin cosmetic decreases.
• component A2 is emulsified with a relatively small amount of surfactant using a polyoxyethylene type nonionic surfactant (component B) having an HLB of 14.5 or more. It is a feature.
• Component B is different from other nonionic surfactants such as polyglycerin, the hydrophilic group is not relatively bulky, the curvature of the oil-water interface is small, and the density of the surfactant at the oil-water interface is high. Become. For this reason, the emulsification power is high, and the emulsification stability is further enhanced.
• component B alone is insufficient to sufficiently enhance the emulsion stability. Therefore, in the present invention, by using a specific acrylic polymer (component C) having a relatively large hydrophobic group in combination, the polymers crosslink and further interact with the oil droplets to enhance the emulsion stability. There is.
• the present invention achieves high emulsion stability while suppressing stickiness and maintaining excellent feeling of use in the emulsion cosmetic containing the component A2 by these effects.
• component B by using the component B, there is also an advantage of being excellent in water resistance. Since surfactant of HLB 12 or so is likely to cause re-emulsification of component A2 and water after application and drying of oil-in-water skin cosmetic, water resistance decreases and component A tends to flow off with water, sweat, etc. Problems arise. On the other hand, since component B has high hydrophilicity, when it comes in contact with water after application and drying of the oil-in-water skin cosmetic preparation, component B is likely to form micelles only, and component A2 is re-emulsified. It is difficult to reduce the water resistance.
• Examples 1 to 13 and Comparative Examples 1 to 6 preparation of oil-in-water type skin cosmetic According to the composition described in Tables 1 to 3, the oil-in-water cosmetic of each of Examples and Comparative Examples was prepared according to a conventional method.
• the oil-in-water skin cosmetics of Examples 1 to 13 were milky lotions.
• the pH at 25 ° C of the oil-in-water skin cosmetic of Examples 1-10 is 8.0-9.0, and the pH of 25 ° C of the oil-in-water skin cosmetic of Examples 11-13 is 6.0- It was 7.0.
• the oil-in-water skin cosmetics of Examples 21 to 31 were milky lotions, and the pH at 25 ° C. was 6.0 to 7.0.
• the skin cosmetic of the example satisfying the composition of the present invention has excellent effects in terms of stability, water resistance and feeling in use.
• Comparative Example 1 and Comparative Example 3 when the content of the component B is less than the specified amount, the effect is inferior in terms of stability and water resistance, and such an effect It has been found that supplementation with less than a nonionic surfactant does not improve. From Comparative Example 2, it was found that when the amount of the component B is larger than the specified amount, deterioration of the feeling of use occurs such that the refreshing feeling of use is lost and stickiness occurs.
• Component B is not contained, and instead, a nonionic surfactant having an HLB of 7.0 or more and less than 14.5 is supplemented, and from Comparative Example 5, a specified amount of Component B is contained. Even when the nonionic surfactant having an HLB of 7.0 or more and less than 14.5 is present at 0.1% by mass or more, the emulsion system can not be prepared, and the evaluation itself is impossible. From Comparative Example 6, it was found that when the component C was not contained, the effect was inferior in terms of stability.
• Comparative Example 21 and Comparative Example 25 showed that when the component C was not included, the stability was inferior.
• Comparative Example 22 in which the amount of component B was less than the specified amount, emulsification could not be stably carried out, and separation occurred, and the sense of use was inferior.
• the stability remained inferior even if the HLB was supplemented with a nonionic surfactant of 7.0 or more and less than 14.5 (Comparative Example 24).
• Comparative Example 23 it was found from Comparative Example 23 that when the component B was larger than the specified amount, stickiness occurred and the feeling in use was inferior.
• Prescription example 1 (sunscreen cosmetic) Paramethoxycinnamate 2-ethylhexyl 10.0% by mass Diethylamino hydroxybenzoyl hexyl benzoate 2.0 mass% Bisethylhexyl oxyphenol methoxyphenyl triazine 2.0 mass% POE-100 Hardened castor oil 3.0% by mass Mono-stearic acid PEG-150 0.2% by mass (Acrylate Na / Acryloyldimethyltaurine Na) copolymer 0.6% by mass Hydrophobized zinc oxide 12.0 mass% 1.5% by weight of sorbitan sesquiisostearate Dimethylpolysiloxane 2.0 mass% Light liquid isoparaffin 15.0% by mass Cetyl 2-ethylhexanoate 5.0% by mass Methyl paraben 0.3 mass% Phenoxyethanol 0.3% by mass Octoxyglycerin 0.1% by mass Menthol
• Prescription example 2 (body care cosmetic) Paramethoxycinnamate 2-ethylhexyl 10.0% by mass Polysorbate 60 2.0 mass% (Acrylate Na / Acryloyldimethyltaurine Na) Copolymer 0.5% by mass Hydrophobized zinc oxide 8.0 mass% Octenyl succinic acid corn starch Al 5.0 mass% Sorbitan oleate 1.5% by mass Dimethylpolysiloxane 5.0 mass% Liquid paraffin 15.0 mass% Glyceryl tri 2-ethylhexanoate 5.0% by mass Methyl paraben 0.3 mass% Phenoxyethanol 0.3% by mass Octoxyglycerin 0.1% by mass Menthol 0.1 mass% Flavoring agent 0.1 mass% Ethanol 5.0 mass% Water balance 100% by mass in total
• Prescription example 3 (skin care cosmetic) (mass%) Macadamia nut fatty acid phytosteryl 5.0 Macadamia Nut Fatty Acid Cholesterol 2.0 Polysorbate 60 3.0 (Acrylic acid Na / Acryloyldimethyltaurine Na) copolymer 0.6 Water 64.5 Octenyl succinate corn starch Al 2.0 Dimethicone 2.0 Liquid paraffin 15.0 Cetyl 2-ethylhexanoate 5.0 Methyl paraben 0.3 Phenoxyethanol 0.3 Octoxyglycerin 0.1 Menthol 0.1 Flavoring agent 0.1 Total 100 (mass%)
• the oil-in-water type skin cosmetic composition of the present invention is a composition in which a highly hydrophobic UV absorber can be highly incorporated, and therefore, it is a sunscreen cosmetic composition, a cosmetic base agent having a sunscreen composition, a body care cosmetic composition and a skin care composition. It can be used suitably as a charge.

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• 2018
  • 2018-09-18 WO PCT/JP2018/034466 patent/WO2019065368A1/ja active Application Filing
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