WO2023218971A1 - 油中水型日焼け止め化粧料 - Google Patents
油中水型日焼け止め化粧料 Download PDFInfo
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- WO2023218971A1 WO2023218971A1 PCT/JP2023/016534 JP2023016534W WO2023218971A1 WO 2023218971 A1 WO2023218971 A1 WO 2023218971A1 JP 2023016534 W JP2023016534 W JP 2023016534W WO 2023218971 A1 WO2023218971 A1 WO 2023218971A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
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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
- A61K8/02—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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/25—Silicon; Compounds thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/34—Alcohols
- A61K8/345—Alcohols containing more than one hydroxy group
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
- A61K8/37—Esters of carboxylic acids
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- 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 a water-in-oil sunscreen cosmetic that suppresses powderiness in the coating film and white cast on the finish, and has a strong ultraviolet protection effect.
- ultraviolet protective agents such as ultraviolet absorbers and ultraviolet scattering agents.
- Ultraviolet absorbers have the advantage of being highly transparent, spreading easily on the skin, and not easily disintegrating with sweat, but they may cause an undesirable feel when used, such as oily or sticky feeling.
- ultraviolet scattering agents which are inorganic powder components such as zinc oxide and titanium oxide, reduce the harm caused by ultraviolet rays to the skin by scattering and reflecting ultraviolet rays through a physical mechanism, so they are similar to oils like ultraviolet absorbers.
- Patent Document 1 discloses that a cosmetic containing 4-tert-butyl-4'-methoxydibenzoylmethane and ethylhexyl methoxycinnamate contains 5% by mass or more of an amphipathic substance and an ester oil with an IOB of 0.05 to 0.60. It is stated that by blending 4-tert-butyl-4'-methoxydibenzoylmethane and ethylhexyl methoxycinnamate against photodeterioration of their UV protection ability, a sunscreen cosmetic having a high UV protection effect can be obtained. has been done.
- Patent Document 2 an amphiphilic substance or a moisturizer with an IOB value of 5.0 or less is used to protect against the ultraviolet rays of the ultraviolet protective agent after heat is applied to the applied film rather than immediately after applying the cosmetic to the skin. It has been reported that it has the effect of enhancing human performance.
- sunscreen cosmetics may require techniques to obtain high UV protection effects, depending on the UV protection agent selected to achieve the desired dosage form and feeling of use.
- an object of the present invention is to provide a low-viscosity water-in-oil sunscreen cosmetic that suppresses powder stains in the coating film and whitening of the finished product, and also has a strong ultraviolet protection effect.
- the present invention (A) an ultraviolet absorber containing octocrylene; and (B) a dihydric alcohol with an IOB of 2.0 or less; including;
- the blending ratio of ethylhexyl methoxycinnamate to the total blending amount of (A) is 15% or less,
- the amount of the ultraviolet scattering agent is 5% by mass or less based on the total amount of the cosmetic,
- the cosmetic according to the present invention By having the cosmetic according to the present invention having the above structure, it is possible to obtain a sunscreen cosmetic that has a strong ultraviolet protection effect even though the amounts of ethylhexyl methoxycinnamate and the ultraviolet scattering agent are small. Moreover, since the sunscreen cosmetic according to the present invention can contain a small amount of ultraviolet scattering agent, it has the advantage that even if it has a low viscosity, it does not have a powdery feeling and does not leave a white cast after application. .
- the cosmetic according to the present invention is characterized by containing (A) an ultraviolet absorber containing octocrylene, and (B) a dihydric alcohol with an IOB of 2.0 or less.
- A an ultraviolet absorber containing octocrylene
- B a dihydric alcohol with an IOB of 2.0 or less.
- the ultraviolet absorber (A) (hereinafter sometimes simply referred to as "component (A)") blended into the cosmetics of the present invention absorbs energy through a chemical mechanism and converts it into energy such as heat. It is commonly added to cosmetics for the purpose of preventing ultraviolet rays from affecting skin cells, and it essentially contains octocrylene, a ⁇ , ⁇ -diphenylacrylate derivative.
- UV absorbers other than octocrylene examples include benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranyl derivatives, Examples include imidazoline derivatives, benzalmalonate derivatives, and 4,4-diarylbutadiene derivatives. Specific examples and product names are listed below, but the invention is not limited to these.
- benzoic acid derivatives include ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA (for example, "Escarol 507"; ISP), glyceryl PABA, PEG-25-PABA (for example, "Uvinal”), P25''; BASF), diethylaminohydroxybenzoylhexyl benzoate (for example, ⁇ Uvinal A Plus''; BASF), and the like.
- PABA ethyl para-aminobenzoate
- ethyl-dihydroxypropyl PABA for example, ethylhexyl-dimethyl PABA
- ISP ethylhexyl-dimethyl PABA
- glyceryl PABA for example, PEG-25-PABA (for example, "Uvinal"), P25''; BASF)
- Salicylic acid derivatives include homosalate ("Eusolex HMS”; Rona/EM Industries), ethylhexyl salicylate or ethylhexyl salicylate (for example “NeoHeliopan OS”; Herman & Reimer), Examples include dipropylene glycol salicylate (eg, "Dipsal”; Skel Corporation), TEA salicylate (eg, "Neo Heliopan TS”; Herman & Reimer), and the like.
- cinnamic acid derivatives examples include octyl methoxycinnamate or ethylhexyl methoxycinnamate (e.g. "Parsol MCX”; Hoffmann-La Roche), isopropyl methoxycinnamate, isoamyl methoxycinnamate (e.g. "Neo Heliopan E1000”; Harman).
- dibenzoylmethane derivatives examples include 4-tert-butyl-4'-methoxydibenzoylmethane (eg, "Parsol 1789”; DSM Nutrition Japan Co., Ltd.).
- benzophenone derivatives include benzophenone-1 (for example, "Uvinal 400"; BASF), benzophenone-2 (for example, “Uvinal D50”; BASF), benzophenone-3 or oxybenzone (for example, "Uvinal M40"; BASF), benzophenone.
- -4 for example, "Uvinal MS40"; BASF
- benzophenone-5 benzophenone-6 (for example, "Helisorb 11"; Norquai)
- benzophenone-8 for example, "Spectra-Sorb” UV- 24''; American Cyanamid Company
- benzophenone-9 for example, ⁇ Uvinal DS-49''; BASF Company
- benzophenone-12 for example, ⁇ Uvinal DS-49''; BASF Company
- benzylidene camphor derivatives include 3-benzylidene camphor (e.g. "Mexoryl SD”; CIMEX), 4-methylbenzylidene camphor, benzylidene camphor sulfonic acid (e.g. "Mexoryl SL”; CIMEX), camphor methsulfate, benzalco
- Examples include terephthalylidene dicamphorsulfonic acid (e.g., "Megizolyl SX”; CIMEX), polyacrylamidomethylbenzylidene camphor (e.g., "Megizolyl SW”; CIMEX), and the like. .
- phenylbenzimidazole derivatives include phenylbenzimidazole sulfonic acid (for example, “Ortholex 232"; Merck & Co.), phenyldibenzimidazole disodium tetrasulfonate (for example, "Neo Heliopan AP”; Herman & Reimer), etc. is exemplified.
- triazine derivatives examples include bisethylhexyloxyphenolmethoxyphenyltriazine (e.g., "Tinosorb S”; Ciba Specialty Chemicals), ethylhexyltriazone (e.g., "Uvinal T150”; BASF), diethylhexylbutamide triazine.
- Azone e.g.
- phenylbenzotriazole derivatives include drometrizole trisiloxane (e.g. "Silatrizole”; Rhodia Simi), methylenebis(benzotriazolyltetramethylbutylphenol) (e.g. "Tinosorb M” (Ciba Specialty), Chemicals Co., Ltd.)), etc. are exemplified.
- anthranyl derivatives include menthyl anthranilate (eg, "Neo Heliopan MA”; Herman & Reimer).
- imidazoline derivatives include ethylhexyldimethoxybenzylidene dioxoimidazolidine propionate.
- benzalmalonate derivatives include polyorganosiloxanes having benzalmalonate functional groups (eg, polysilicone-15; "Pulsol SLX”; DSM Nutrition Japan Co., Ltd.).
- Examples of the 4,4-diarylbutadiene derivative include 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene.
- octocrylene alone may be used alone, or octocrylene and one or more of the other ultraviolet absorbers described above may be used in combination.
- the blending amount of component (A) is 3 to 40% by mass, preferably 5 to 30% by mass, based on the total amount of the cosmetic. If the amount of component (A) is less than 3% by mass, it is difficult to obtain a sufficient UV protection effect, and even if it is more than 40% by mass, the UV protection effect cannot be expected to increase commensurate with the amount blended, and on the contrary, it becomes unstable. This is undesirable from the viewpoint of poor performance and usability.
- ethylhexyl methoxycinnamate is often blended to achieve high SPF.
- ethylhexyl methoxycinnamate tends to hinder the improvement of ultraviolet protection ability due to heating when components (A) and (B) of the present invention are combined.
- the blending ratio of ethylhexyl methoxycinnamate to the total blending amount of the ultraviolet absorber (A) is 15% or less in terms of mass ratio, Preferably it is 10% or less.
- the embodiments of the cosmetic according to the present invention also include embodiments that do not contain ethylhexyl methoxycinnamate.
- the sunscreen cosmetics according to the present invention can obtain a high UV protection effect only by blending the component (A), so the amount of UV scattering agents such as zinc oxide and titanium oxide may be reduced or the amount of UV scattering agents may be reduced.
- the ultraviolet scattering agent refers to a powder of zinc oxide, titanium oxide, etc. having a refractive index of 1.5 or more, and fine particles having an average particle size of 0.1 ⁇ m or less.
- Embodiments of the cosmetic according to the present invention include embodiments in which the amount of the ultraviolet scattering agent is 5% by mass or less, 3% by mass or less, or 1% by mass or less based on the total amount of the cosmetic, or it does not contain a UV scattering agent. Aspects are included.
- the cosmetics according to the present invention while it is possible to increase the UV protection ability of the cosmetic itself by incorporating an ultraviolet scattering agent, it has been found that it is difficult to enhance the UV protection effect by heat. Therefore, in the cosmetic according to the present invention, by reducing the amount of the ultraviolet scattering agent or not including the ultraviolet scattering agent, the effect of improving the ability to protect against ultraviolet rays due to heat can be sufficiently exhibited. In addition, in the cosmetics according to the present invention, by reducing the amount of ultraviolet scattering agent or not including ultraviolet scattering agent, when applied to the skin, it does not leave a white cast and does not cause powdery stains. You can get preventive cosmetics.
- the dihydric alcohol (B) (hereinafter sometimes simply referred to as "component (B)") blended into the cosmetics according to the present invention is one commonly used in cosmetics, and has an IOB of 2.0.
- component (B) a dihydric alcohol blended into the cosmetics according to the present invention
- IOB an IOB of 2.0.
- the blending amount of component (B) is 3 to 10% by mass, preferably 4 to 7% by mass, based on the total amount of the cosmetic. If the amount of component (B) is less than 3% by mass, it is difficult to obtain a sufficient effect of improving UV protection ability, and if it exceeds 10% by mass, stability may decrease or the usability may deteriorate such as stickiness. be.
- the sunscreen cosmetic according to the present invention has a viscosity of 1,000 mPa ⁇ s or less.
- the lower limit of the viscosity is preferably 200 mPa ⁇ s or more. Therefore, a suitable viscosity range is 200 to 1,000 mPa ⁇ s.
- the viscosity in this specification is a value measured with a B-type viscometer at 30°C.
- (C) hydrophobized silica may be further added from the viewpoint of further enhancing the UV protection ability of the cosmetic itself. good.
- the UV protection ability of the cosmetic before heat is applied can be enhanced.
- the hydrophobized silica (C) (hereinafter sometimes simply referred to as “component (C)") blended into the cosmetics according to the present invention is silica (silicic anhydride) commonly used in the field of cosmetics.
- the particles have a hydrophobic surface, an average particle diameter of 2 to 8 ⁇ m, a specific surface area of 200 to 350 m 2 /g, and an oil absorption of 100 ml/100 g or more, preferably 100 to 200 ml/100 g.
- porous spherical silica is preferred.
- hydrophobizing the particle surface of hydrophobized silica is not particularly limited, but from the viewpoint of obtaining high UV protection ability, silicones such as methylhydrogenpolysiloxane and dimethylpolysiloxane are used as a hydrophobizing agent. is preferred.
- hydrophobized silica examples include SA-SB-150 and SA-SB-300 (manufactured by Miyoshi Kasei Co., Ltd.).
- the blending amount of component (C) does not necessarily have to be blended as it is a selective blending ingredient in the cosmetics according to the present invention, but if it is blended, it must be blended to the extent that the effect of the blend is recognized. It is preferable that the amount is blended within a limit that does not cause adverse effects such as excessive blending and impairing the feeling of use.
- the preferred blending amount of component (C) in the cosmetic according to the present invention is preferably about 1 to 10% by mass or about 2 to 8% by mass based on the total amount of the cosmetic.
- the cosmetics according to the present invention may contain other components commonly used in cosmetics, as long as they do not impede the effects of the present invention.
- surfactants oils, powder components, pH adjusters, chelating agents, preservatives, antioxidants, drugs, alcohols, coloring agents, pigments, and the like can be blended as appropriate.
- Cosmetics according to the present invention include not only sunscreen cosmetics, but also skin care cosmetics such as lotions with sunscreen effects, makeup bases, and hair cosmetics (hair sprays and hair cosmetics for protecting hair and scalp from ultraviolet rays). It can be provided as a variety of hair products (including various hair products such as treatments).
- Aerosol cosmetics are products in which a stock solution, which is a water-in-oil emulsion, and a propellant, such as liquefied petroleum gas, dimethyl ether, nitrogen, oxygen, carbon dioxide, or chlorofluorocarbon, are filled in a pressure-resistant valve can.
- a propellant such as liquefied petroleum gas, dimethyl ether, nitrogen, oxygen, carbon dioxide, or chlorofluorocarbon
- it can be adjusted to a spray-like (mist-like) form, a foam-like form (foam-like), etc., but a spray-like form is preferred from the viewpoint of ease of application to the skin or hair.
- the sunscreen cosmetic according to the present invention has a property that the ultraviolet protection effect (also referred to as “ultraviolet protection ability") of the coating film is improved by heat.
- the ultraviolet protection effect also referred to as “ultraviolet protection ability”
- the ultraviolet protection effect is improved by heat
- a predetermined amount of a cosmetic sample is dropped onto a measurement plate, applied to a predetermined area, and dried to form a coating film.
- the absorbance of the coating film is measured over a range of 280 to 400 nm using a spectrophotometer or the like, and the integrated value of the absorbance of the coating film is determined based on the absorbance of the uncoated measurement plate.
- the measurement plate on which the coating film has been formed is heated under predetermined conditions, and the absorbance of the coating film after returning to room temperature is measured, and the integrated absorbance value is determined in the same manner.
- the rate of change in the integrated absorbance value before and after the heat treatment (absorbance change rate) is calculated according to the following formula.
- Absorbance change rate (%) (Accumulated absorbance value after heat treatment) / (Accumulated absorbance value before heat treatment) x 100 When the rate of change exceeds 100%, it is defined that the UV protection effect has improved (enhanced).
- absorbance at a single wavelength (ultraviolet region), critical wavelength, or SPF or UVAPF (or "PFA") calculated based on the measured absorbance may be used as an index.
- the temperature at which the coating film is heated is preferably in the range of 30°C to 70°C, for example, it can be 32°C or higher, 35°C or higher, 37°C or higher, or 40°C or higher, and 65°C or lower, 60°C or lower. , 55°C or less, or 50°C or less. If the heating temperature exceeds 70° C., problems such as melting of the resin measurement plate may occur.
- the heating time is preferably 1 minute or more, more preferably 10 minutes or more, in order to accurately evaluate the influence of heat.
- the upper limit of the heating time is not particularly limited, but is usually 60 minutes or less, preferably 30 minutes or less.
- the effect of improving UV protection ability is obtained by combining the components (A) and (B), so the IOB value of components other than component (B), for example, as reported in Patent Document 2. It is not necessary to include an amphipathic substance or a humectant with a value of 5.0 or less.
- the amphiphilic substance or humectant having an IOB value of 5.0 or less is less than 5% by mass, less than 3% by mass, less than 1% by mass, or 0.1% by mass based on the total amount of the cosmetic.
- the blending amount may be less than % by mass, or may not be blended.
- the amphipathic substance or humectant having an IOB value of 5.0 or less other than component (B) of the present invention specifically refers to those shown in (1) and (2) below.
- a polyoxyalkylene/polyoxyethylene copolymer dialkyl ether represented by the following formula (I).
- R 1 O-[(AO) m (EO) n ]-R 2 (I)
- AO represents an oxyalkylene group having 3 to 4 carbon atoms
- EO represents an oxyethylene group
- R 1 and R 2 each independently represent a hydrocarbon group having 1 to 4 carbon atoms.
- PEG/PPG-9/2 dimethyl ether PEG/PPG-17/4 dimethyl ether, PEG/PPG-14/7 dimethyl ether, PEG/PPG-11/9 dimethyl ether, PEG/PPG-55/28 dimethyl ether, These include PEG/PPG-36/41 dimethyl ether, PEG/PPG-6/3 dimethyl ether, PEG/PPG-8/4 dimethyl ether, PEG/PPG-6/11 dimethyl ether, and PEG/PPG-14/27 dimethyl ether.
- Specific examples of the polyalkylene glycol represented by the formula (II) include polyethylene glycols 150 to 23,000, such as polyethylene glycol 300, polyethylene glycol 400, polyethylene glycol 1500, and polyethylene glycol 20,000.
- dihydric alcohol of the present invention partially overlaps with the amphipathic substance described in Patent Document 1 and the amphiphilic substance and moisturizing agent described in Patent Document 2, but does not completely match them.
- PEG/PPG-9/2 which has the effect of improving UV protection ability due to heat in Patent Document 2.
- dimethyl ether and polyethylene glycol 300 are difficult to obtain the effect of improving UV protection ability due to heat.
- Embodiments of the cosmetic according to the present invention include polyoxyalkylene/polyoxyethylene copolymer dialkyl ether represented by the above formula (I), polyalkylene glycol represented by the above formula (II), butylene glycol, di- Embodiments free of glycerin, propanediol, erythritol, xylitol, methylgluceth-10 and sorbitol are included.
- embodiments of the cosmetic according to the present invention include embodiments in which the amount of ester oil with an IOB value of 0.3 or more is less than 5% by mass, less than 3% by mass, or less than 1% by mass based on the total amount of the cosmetic. Also included are embodiments that do not contain an ester oil having an IOB value of 0.3 or more.
- the cosmetic material is selected from dextrin fatty acid ester, sucrose fatty acid ester, solid or semi-solid hydrocarbon oil, organically modified clay mineral, and fatty acid or its salt. It is not necessary to incorporate an oil phase thickener. Therefore, an embodiment of the cosmetic according to the present invention includes an oil phase thickener selected from dextrin fatty acid esters, sucrose fatty acid esters, solid or semisolid hydrocarbon oils, organically modified clay minerals, and fatty acids or salts thereof.
- the blending amount of is less than 3% by mass, less than 1% by mass, less than 0.5% by mass, or less than 0.1% by mass based on the total amount of the cosmetic, and an embodiment in which the oil phase thickener is not included.
- the cosmetic composition according to the present invention it is not necessary to blend dextrin fatty acid ester and/or organically modified clay mineral in order to obtain the effect of improving UV protection ability. Therefore, aspects of the cosmetic according to the present invention include those in which the amount of the dextrin fatty acid ester and/or organically modified clay mineral is less than 3% by mass, less than 1% by mass, less than 0.5% by mass, based on the total amount of the cosmetic.
- dextrin fatty acid ester and organically modified clay mineral are included.
- dextrin fatty acid esters include dextrin palmitate
- organically modified clay minerals include dimethyl distearyl ammonium hectorite (disteardimonium hectorite).
- the present invention will be explained in more detail with reference to Examples below, but the present invention is not limited by these in any way.
- the blending amount is expressed in mass % based on the system in which the component is blended. Before explaining each example in detail, the evaluation method employed will be explained.
- Water-in-oil sunscreen cosmetics having the compositions listed in Tables 1 and 2 below were prepared by a conventional method. Specifically, the powder was dispersed in an oily component mixed using a homomixer, and then a well-mixed aqueous component was added to obtain a cosmetic. The UV protection ability of the prepared cosmetics was measured according to the evaluation method described above. The results are also shown in the table.
- Example 3 containing (C) hydrophobized silica (methylpolysiloxane-treated silica) in addition to components (A) and (B) of the present invention, the total amount of ultraviolet absorbers contained in Example 3 was although it was the same as cosmetics 1, 2, and 4, it had high UV protection ability. This indicates that the combination of component (B) and component (C) of the present invention enhanced the UV protection ability of the cosmetic.
- Example 2 in which silica is blended
- Example 3 in which (C) hydrophobized silica is blended
- a remarkable effect of improving ultraviolet protection ability can be obtained when (C) hydrophobized silica is blended.
- water-in-oil sunscreen cosmetics having the compositions listed in Table 3 were prepared by a conventional method by changing the blending amounts of the ultraviolet scattering agent and ethylhexyl methoxycinnamate. Similarly, the UV protection ability of the prepared cosmetics was measured according to the evaluation method described above. The results are also shown in the table.
- the amount of UV scattering agent is low, and the ratio of ethylhexyl methoxycinnamate to the total amount of UV absorbers is low.
- the lower the value the higher the UV protection ability can be obtained, and the effect of improving the UV protection ability due to heat can also be obtained.
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Abstract
Description
よって、日焼け止め化粧料において、高い紫外線防御効果(高SPF)を実現するためには、紫外線吸収剤および紫外線散乱剤のそれぞれの利点を活かしながら、バランス良く組み合わせて配合することが一般的である。
よって、本発明は、塗布膜での粉ぎしみや仕上がりの白浮きを抑制するとともに、強力な紫外線防御効果を有する、低粘度の油中水型日焼け止め化粧料を提供することを目的とする。
(A)オクトクリレンを含む紫外線吸収剤、および
(B)IOBが2.0以下の二価アルコール、
を含み、
前記(A)の合計配合量に対するメトキシケイヒ酸エチルヘキシルの配合割合が15%以下であり、
紫外線散乱剤の配合量が、化粧料全量に対して5質量%以下であり、
粘度が1000mPa・s以下である、油中水型日焼け止め化粧料を提供する。
本発明に係る化粧料に配合される(A)紫外線吸収剤(以下、単に「(A)成分」と称する場合がある)は、化学的な仕組みでエネルギーを吸収し、熱などのエネルギーに変換して紫外線が皮膚の細胞に影響を与えることを防ぐ目的で化粧料に通常配合されるものであって、β,β-ジフェニルアクリレート誘導体であるオクトクリレンを必須に含む。
本発明に係る化粧料に配合される(B)二価アルコール(以下、単に「(B)成分」と称する場合がある)は、化粧料に通常用いられるものであって、IOBが2.0以下のものをいう。具体例としては、ペンチレングリコール(IOB=2.0)、ジプロピレングリコール(IOB=1.84)、ヘキシレングリコール(IOB=1.8)、エチルジグリコール(IOB=1.2)等が挙げられ、なかでもジプロピレングリコールを用いるのが好ましい。
次いで、当該塗膜を形成した測定プレートを所定条件下で加熱し、常温に戻った後の塗膜の吸光度を測定し、吸光度積算値を同様に求める。
加熱処理前後の吸光度積算値の変化率(吸光度変化率)は以下の式に従って計算する。
吸光度変化率(%)=
(熱処理後の吸光度積算値)/(熱処理前の吸光度積算値)×100
変化率が100%を超えた場合に、紫外線防御効果が向上(増強)したものと定義する。
塗膜を加熱する温度は30℃~70℃の範囲とするのが好ましく、例えば32℃以上、35℃以上、37℃以上、あるいは40℃以上とすることができ、65℃以下、60℃以下、55℃以下、あるいは50℃以下の温度とすることができる。加熱温度が70℃を超えると樹脂製の測定プレートが溶解する等の問題を生じることがある。
加熱時間は、熱による影響を的確に評価するために、1分以上とすることが好ましく、より好ましくは10分以上である。加熱時間の上限としては、特に限定されないが、通常は60分以下、好ましくは30分以下である。
R1O-[(AO)m(EO)n]-R2 (I)
(式(I)中、AOは炭素原子数3~4のオキシアルキレン基を示し、EOはオキシエチレン基を示し、R1及びR2は、それぞれ独立に、炭素原子数1~4の炭化水素基又は水素原子を示し、1≦m≦70、1≦n≦70である)
具体例としては、PEG/PPG-9/2ジメチルエーテル、PEG/PPG-17/4ジメチルエーテル、PEG/PPG-14/7ジメチルエーテル、PEG/PPG-11/9ジメチルエーテル、PEG/PPG-55/28ジメチルエーテル、PEG/PPG-36/41ジメチルエーテル、PEG/PPG-6/3ジメチルエーテル、PEG/PPG-8/4ジメチルエーテル、PEG/PPG-6/11ジメチルエーテル、PEG/PPG-14/27ジメチルエーテルがある。
HO(RO)pH (II)
(式(II)中、ROは炭素原子数2~4のオキシアルキレン基を示し、pは3~500である)、および、ブチレングリコール、ジグリセリン、プロパンジオール、エリスリトール、キシリトール、メチルグルセス-10、ソルビトールから選択される多価アルコール。
前記式(II)で表されるポリアルキレングリコールの具体例としては、ポリエチレングリコール300、ポリエチレングリコール400、ポリエチレングリコール1500、ポリエチレングリコール20000等のポリエチレングリコール150~23000がある。
また、本発明に係る化粧料においては、紫外線防御能向上効果を得る目的で、デキストリン脂肪酸エステルおよび/または有機変性粘土鉱物を配合しなくてもよい。よって、本発明に係る化粧料の態様には、デキストリン脂肪酸エステルおよび/または有機変性粘土鉱物の配合量が化粧料全量に対して3質量%未満、1質量%未満、0.5質量%未満、または0.1質量%未満である態様や、デキストリン脂肪酸エステルおよび有機変性粘土鉱物を含まない態様が包含される。デキストリン脂肪酸エステルの具体例としては、パルミチン酸デキストリン等が挙げられ、有機変性粘土鉱物の具体例としては、ジメチルジステアリルアンモニウムヘクトライト(ジステアルジモニウムヘクトライト)等が挙げられる。
測定プレート(Sプレート)(5×5cmのV溝PMMA板、SPFMASTER-PA01)に各例の化粧料(サンプル)を2mg/cm2の量で滴下し、60秒間指で塗布し、15分間乾燥した後に、形成された塗膜の吸光度をU-3500型自記録分光光度計(日立製作所製)にて310nmにおける吸光度を測定した。測定値が大きいほど紫外線防御能が高いことを表す。
測定プレート(Sプレート)(5×5cmのV溝PMMA板、SPFMASTER-PA01)に各例の化粧料(サンプル)を2mg/cm2の量で滴下し、60秒間指で塗布し、15分間乾燥した後に、形成された塗膜の吸光度をU-3500型自記録分光光度計(日立製作所製)にて測定した。無塗布のプレートをコントロールとし、吸光度(Abs)を以下の式で算出し、280nm~400nmにおける測定値を積算し、310nmにおける吸光度を求めた。
Abs=-log(T/To)
T:サンプルの透過率、To:無塗布の透過率
次いで、前記塗膜を有するプレートを恒温槽に置き、37℃、30分の加熱処理を行い、前記と同様に310nmにおける吸光度を求めた。
各サンプルについて熱照射前後の吸光度の変化率(熱変化率)を次式に従って算出した。
熱変化率(%)=[(熱処理後の310nmにおける吸光度)/(熱処理前の310nmにおける吸光度)]×100
前記熱変化率が100%を超えた場合に、紫外線防御能向上効果が生じたと評価する。
また、本発明の(B)成分に代えて、IOBが2.4である二価アルコール(比較例3)、PEG/PPG-9/2ジメチルエーテル(比較例4)、ポリエチレングリコール300(比較例5)を配合した場合にも、熱による紫外線防御能向上効果が得られなかった。
さらに、本発明の(A)および(B)成分に加え、(C)疎水化シリカ(メチルポリシロキサン処理シリカ)を配合した実施例3の化粧料では、紫外線吸収剤の合計配合量が実施例1、2および4の化粧料と同じであるにもかかわらず、高い紫外線防御能を有していた。これは、本発明の(B)成分と(C)成分との組み合わせによって、化粧料が有する紫外線防御能が増強されたことが示される。
また、シリカを配合する実施例2と(C)疎水化シリカを配合する実施例3との比較から、(C)疎水化シリカを配合した場合において顕著な紫外線防御能向上効果が得られることが示された。
また、本発明の(A)成分の合計配合量に対するメトキシケイヒ酸エチルヘキシルの配合割合を高くすると、熱による紫外線防御能向上効果が得られにくくなった(比較例7)。
一方、実施例3、5および6に示されるように、本発明の化粧料においては、紫外線散乱剤の配合量が低く、かつ、紫外線吸収剤の合計配合量に対するメトキシケイヒ酸エチルヘキシルの配合割合が低い方がより高い紫外線防御能が得られるとともに、熱による紫外線防御能向上効果も得ることができた。
Claims (6)
- (A)オクトクリレンを含む紫外線吸収剤、および
(B)IOBが2.0以下の二価アルコール、
を含み、
前記(A)の合計配合量に対するメトキシケイヒ酸エチルヘキシルの配合割合が15%以下であり、
紫外線散乱剤の配合量が、化粧料全量に対して5質量%以下であり、
粘度が1000mPa・s以下である、油中水型日焼け止め化粧料。 - メトキシケイヒ酸エチルヘキシルを含まない、請求項1に記載の油中水型日焼け止め化粧料。
- 紫外線散乱剤を含まない、請求項1または2に記載の油中水型日焼け止め化粧料。
- 前記(B)成分がジプロピレングリコールである、請求項1に記載の油中水型日焼け止め化粧料。
- さらに、(C)疎水化シリカを含む、請求項1に記載の油中水型日焼け止め化粧料。
- エアゾール式用化粧料である、請求項1に記載の油中水型日焼け止め化粧料。
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| Application Number | Priority Date | Filing Date | Title |
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| US18/843,912 US20250177272A1 (en) | 2022-05-10 | 2023-04-26 | Water-in-oil sunscreen cosmetic |
| CN202380022792.XA CN118748937A (zh) | 2022-05-10 | 2023-04-26 | 油包水型防晒化妆品 |
| JP2024520381A JPWO2023218971A1 (ja) | 2022-05-10 | 2023-04-26 |
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| US (1) | US20250177272A1 (ja) |
| JP (1) | JPWO2023218971A1 (ja) |
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| WO (1) | WO2023218971A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070274932A1 (en) * | 2006-05-15 | 2007-11-29 | The Procter & Gamble Company | Water in oil emulsion compositions containing sunscreen actives and siloxane elastomers |
| JP2008195693A (ja) * | 2007-02-15 | 2008-08-28 | Kose Corp | 油中水乳化型日焼け止め料 |
| WO2020032243A1 (ja) * | 2018-08-10 | 2020-02-13 | 株式会社 資生堂 | 乳化化粧料 |
| JP2020040994A (ja) * | 2016-05-16 | 2020-03-19 | 信越化学工業株式会社 | 化粧料組成物 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102174526B1 (ko) * | 2019-01-25 | 2020-11-05 | 코스맥스 주식회사 | 쿨링감을 부여하는 자외선 차단용 화장료 조성물 |
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2023
- 2023-04-26 US US18/843,912 patent/US20250177272A1/en active Pending
- 2023-04-26 CN CN202380022792.XA patent/CN118748937A/zh active Pending
- 2023-04-26 JP JP2024520381A patent/JPWO2023218971A1/ja active Pending
- 2023-04-26 WO PCT/JP2023/016534 patent/WO2023218971A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070274932A1 (en) * | 2006-05-15 | 2007-11-29 | The Procter & Gamble Company | Water in oil emulsion compositions containing sunscreen actives and siloxane elastomers |
| JP2008195693A (ja) * | 2007-02-15 | 2008-08-28 | Kose Corp | 油中水乳化型日焼け止め料 |
| JP2020040994A (ja) * | 2016-05-16 | 2020-03-19 | 信越化学工業株式会社 | 化粧料組成物 |
| WO2020032243A1 (ja) * | 2018-08-10 | 2020-02-13 | 株式会社 資生堂 | 乳化化粧料 |
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| JPWO2023218971A1 (ja) | 2023-11-16 |
| CN118748937A (zh) | 2024-10-08 |
| US20250177272A1 (en) | 2025-06-05 |
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