Cosmetic composition

Abstract

Provided is a cosmetic composition having a UVA and UVB ultraviolet light absorption effect, and having improved usability.　The cosmetic composition comprises an ultraviolet light absorbing agent, a hydrophobized silica powder, and an oil. The ultraviolet light absorbing agent includes a compound I that has a structure indicated by formula (I). (In the formula, -OA represents an alkoxy group.)

Description

Cosmetic composition

[0001] The present invention relates to a cosmetic composition.

[0002] Protecting skin from UV rays is an important issue in skin care and body care. Not only mid-wavelength UV rays (UVB region: wavelength 290-320 nm), which are known to cause sunburn and inflammation, but also long-wavelength UV rays (UVA region: wavelength 320-400 nm), are known to have effects on the skin (such as photoaging).

[0003] Conventional cosmetics for UV protection often contain 2-ethylhexyl p-methoxycinnamate as an ultraviolet absorber. Although 2-ethylhexyl p-methoxycinnamate has the effect of absorbing ultraviolet rays in the UVB region, there is a demand for ultraviolet absorbers with better ultraviolet absorption ability in the UVA region.

[0004] In contrast to this, the ultraviolet absorber disclosed in Patent Document 1 has an ability to absorb both UVA and UVB regions, and has an ultraviolet suppression effect over a wide range of wavelengths. It also has a previously unseen property of increasing its ultraviolet absorption ability in the UVA and UVB regions with the passage of time during ultraviolet irradiation, and further has excellent solubility.

[0005] More specifically, the ultraviolet absorber of Patent Document 1 is represented by the general formula I: (wherein -OA represents an alkoxy group) as an active ingredient.

[0006] International Publication No. 2009 / 041098

[0007] In the present invention, in order to obtain ultraviolet absorbing effects in the UVA and UVB regions, cosmetic compositions containing the compound represented by the above general formula I, for example, water-in-oil cosmetic compositions, were attempted.

[0008] However, water-in-oil cosmetic compositions containing the compound represented by the above general formula I have the problem that their usability (particularly usability based on stickiness, weight of spreadability, and good compatibility) becomes worse than before the compound is added.

[0009] The present invention is intended to improve the above-mentioned circumstances, and its object is to provide a cosmetic composition that has an ultraviolet absorbing effect in the UVA and UVB regions and has improved usability.

[0010] The present invention that achieves the above object is as follows.

[0011] Aspect 1: A cosmetic composition comprising an ultraviolet absorber, a hydrophobically treated silica powder, and an oil component, wherein the ultraviolet absorber comprises a compound I having the structure of the following formula (I): (wherein -OA represents an alkoxy group) Aspect 2 The composition according to Aspect 1, wherein the content of Compound I is 0.01 to 5.0% by mass. Aspect 3 The composition according to Aspect 1 or 2, wherein the content of the ultraviolet absorber is 3.0 to 25% by mass; the content of the hydrophobized silica powder is 0.5 to 10% by mass; and the content of the oil component is 5.0 to 60% by mass. Aspect 4 The composition according to any one of Aspects 1 to 3, wherein the hydrophobized silica powder is a silicone-treated silica powder. Aspect 5 The composition according to any one of Aspects 1 to 4, wherein the oil component comprises a polar oil. Aspect 6 The composition according to any one of Aspects 1 to 5, wherein the oil component comprises a silicone oil. Aspect 7 The composition according to Aspect 6, wherein the silicone oil comprises a volatile acyclic silicone oil. Aspect 8 The composition according to any one of Aspects 1 to 7, further comprising ultraviolet scattering agent particles. Aspect 9: The composition according to any one of Aspects 1 to 8, having a viscosity of 500 mPa·s to 10,000 mPa·s when measured at a temperature of 30°C and a rotational speed of 12 rpm. Aspect 10: The composition according to any one of Aspects 1 to 9, which is a water-in-oil type. Aspect 11: The composition according to any one of Aspects 1 to 10, which is a two-layer separated type that is shaken when used. Aspect 12: The composition according to any one of Aspects 1 to 11, which is a sunscreen cosmetic.

[0012] According to the present invention, it is possible to provide a cosmetic composition that has an ultraviolet absorbing effect in the UVA and UVB regions and has improved usability.

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the preferred embodiments. However, the present invention is not limited to the following embodiments, and various modifications can be made within the scope of the present invention.

[0014] Cosmetic Composition The cosmetic composition of the present invention (hereinafter also simply referred to as "the composition of the present invention") comprises an ultraviolet absorber, a hydrophobized silica powder, and an oil component, and the ultraviolet absorber comprises a compound I having a structure of the following formula (I): (wherein —OA represents an alkoxy group).

[0015] As a result of intensive research by the present inventors, it was found that when Compound I as an ultraviolet absorber is blended into, for example, a water-in-oil cosmetic composition, the usability of the entire composition is deteriorated.

[0016] Conventionally, usability-improving powders such as silica powder have been known to improve the usability of cosmetic compositions. However, even when silica powder was added to a cosmetic composition containing Compound I, no improvement in usability was observed.

[0017] Further intensive research by the present inventors has revealed that the use of hydrophobically treated silica powder in a cosmetic composition containing Compound I significantly improves the usability of the entire composition.

[0018] In the present invention, the usability of a composition refers to usability based on the stickiness, the ease of spreading, and the goodness of compatibility when the composition is applied to the skin. Thus, the composition of the present invention with improved usability is a composition that does not feel sticky or heavy when applied to the skin, and has a good compatibility.

[0019] <Ultraviolet Absorber> The composition of the present invention contains an ultraviolet absorber.

[0020] In the composition of the present invention, the content of the ultraviolet absorber is not particularly limited and may be, for example, 3.0 mass% or more, 4.0 mass% or more, 5.0 mass% or more, 6.0 mass% or more, 7.0 mass% or more, 8.0 mass% or more, 9.0 mass% or more, or 10 mass% or more, and may be 25 mass% or less, 20 mass% or less, 15 mass% or less, or 12 mass% or less.

[0021] In the present invention, the content of each component in the composition refers to the content in the entire composition unless otherwise specified.

[0022] (Compound I) The ultraviolet absorber according to the present invention includes Compound I having the structure of the following formula (I): (wherein —OA represents an alkoxy group)

[0023] In formula (I), -OA represents an alkoxy group, and more specific examples include, but are not limited to, a methoxy group or an ethoxy group.

[0024] In the present invention, compound I may have the same structure as the compound represented by general formula I disclosed in Patent Document 1.

[0025] The composition of the present invention contains Compound I, and thus has an ultraviolet absorbing effect in the UVA and UVB regions.

[0026] In the composition of the present invention, the content of Compound I is not particularly limited and may be, for example, 0.01 mass% or more, 0.05 mass% or more, 0.1 mass% or more, 0.5 mass% or more, 1.0 mass% or more, 1.5 mass% or more, 2.0 mass% or more, 2.5 mass% or more, or 3.0 mass% or more, and may be 5.0 mass% or less, 4.5 mass% or less, 4.0 mass% or less, 3.5 mass% or less, 3.0 mass% or less, 2.5 mass% or less, or 2.0 mass% or less.

[0027] (Other UV absorbers) In the composition of the present invention, the UV absorber may further include another UV absorber other than Compound I described above.

[0028] In the present invention, examples of other ultraviolet absorbers include, but are not limited to, benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzotriazole derivatives, anthranil derivatives, imidazoline derivatives, benzalmalonate derivatives, and 4,4-diarylbutadiene derivatives.

[0029] Examples of benzoic acid derivatives include, but are not limited to, ethyl para-aminobenzoate (PABA), ethyl-dihydroxypropyl PABA, ethylhexyl-dimethyl PABA, glyceryl PABA, PEG-25-PABA, and diethylaminohydroxybenzoylhexyl benzoate.

[0030] Salicylic acid derivatives include, but are not limited to, homosalate, ethylhexyl salicylate, dipropylene glycol salicylate, and TEA salicylate.

[0031] Cinnamic acid derivatives include, but are not limited to, octyl methoxycinnamate, isopropyl methoxycinnamate, isoamyl methoxycinnamate, cinnoxate, DEA methoxycinnamate, diisopropyl methylcinnamate, glyceryl-ethylhexanoate-dimethoxycinnamate, and di-(2-ethylhexyl)-4'-methoxybenzalmalonate.

[0032] Dibenzoylmethane derivatives include, but are not limited to, 4-tert-butyl-4'-methoxydibenzoylmethane and the like.

[0033] β,β-diphenylacrylate derivatives include, but are not limited to, octocrylene and the like.

[0034] Benzophenone derivatives include, but are not limited to, benzophenone-1, benzophenone-2, benzophenone-3 or oxybenzone, benzophenone-4, benzophenone-5, benzophenone-6, benzophenone-8, benzophenone-9, and benzophenone-12.

[0035] Benzylidene camphor derivatives include, but are not limited to, 3-benzylidene camphor, 4-methylbenzylidene camphor, benzylidene camphorsulfonic acid, benzalkonium camphor methosulfate, terephthalidene discamphorsulfonic acid, and polyacrylamidomethylbenzylidene camphor.

[0036] Phenylbenzimidazole derivatives include, but are not limited to, phenylbenzimidazole sulfonic acid, and disodium phenyldibenzimidazole tetrasulfonate.

[0037] Triazine derivatives include, but are not limited to, anisotriazine, ethylhexyltriazone, diethylhexylbutamidotriazone, and 2,4,6-tris(diisobutyl-4'-aminobenzalmalonate)-s-triazine.

[0038] Phenylbenzotriazole derivatives include, but are not limited to, drometrizole trisiloxane, and methylenebis(benzotriazolyltetramethylbutylphenol).

[0039] Anthranil derivatives include, but are not limited to, menthyl anthranilate and the like.

[0040] Imidazoline derivatives include, but are not limited to, ethylhexyldimethoxybenzylidene dioxoimidazoline propionate and the like.

[0041] Benzalmalonate derivatives include, but are not limited to, polyorganosiloxanes having benzalmalonate functional groups.

[0042] Examples of 4,4-diarylbutadiene derivatives include, but are not limited to, 1,1-dicarboxy(2,2'-dimethylpropyl)-4,4-diphenylbutadiene and the like.

[0043] When the composition of the present invention further contains another ultraviolet absorber, the content thereof is not particularly limited and may be, for example, 1.0 mass% or more, 2.0 mass% or more, 2.5 mass% or more, 5.0 mass% or more, or 10 mass% or more, and may be 20 mass% or less, 15 mass% or less, or 12 mass% or less.

[0044] <Hydrophobic Treated Silica Powder> The composition of the present invention contains a hydrophobic treated silica powder. By including the hydrophobic treated silica powder, the usability of the entire composition can be improved.

[0045] In the present invention, the hydrophobized silica powder refers to silica powder whose surface has been subjected to a hydrophobization treatment.

[0046] In the present invention, the method for hydrophobizing silica powder is not particularly limited, and examples thereof include silicone treatment, fatty acid treatment, fatty acid soap treatment, fatty acid ester treatment, higher alcohol treatment, silylation treatment based on silica aerogel, which is a porous material obtained by replacing the liquid component of silica gel with air (by drying), a method in which wet-method silica sol is hydrophobized and dried to obtain hydrophobized silica particles, and a method in which a silazane compound or a monofunctional silane compound is added to a hydrophilic silica particle dispersion to triorganosilanize the surface of the silica particles. a method in which a tetrafunctional silane compound is hydrolyzed and condensed to obtain a hydrophilic silica particle dispersion, the hydrophilic organic solvent is then substituted with water, and the hydrophilic silica particle dispersion is then hydrophobized with a trifunctional silane compound, and the dispersion medium is then substituted with a ketone solvent, and reactive groups remaining on the silica particle surface are triorganosilylated with a silazane compound or a monofunctional silane compound to obtain hydrophobized silica particles; and a method in which a trifunctional silane compound is added to a hydrophilic silica particle dispersion to hydrophobize it, and then a monofunctional silane compound is added to obtain hydrophobized silica particles, but this is not limited to these.

[0047] More specifically, examples of silicone treatments include, but are not limited to, treatments with silicone oils such as methylhydrogenpolysiloxane, dimethylpolysiloxane, and methylphenylpolysiloxane; alkylsilanes such as methyltrimethoxysilane, ethyltrimethoxysilane, hexyltrimethoxysilane, and octyltrimethoxysilane; and fluoroalkylsilanes such as trifluoromethylethyltrimethoxysilane and heptadecafluorodecyltrimethoxysilane.

[0048] Examples of fatty acid treatments include, but are not limited to, treatments with palmitic acid, isostearic acid, stearic acid, lauric acid, myristic acid, behenic acid, oleic acid, rosin acid, 12-hydroxystearic acid, and the like.

[0049] Examples of fatty acid soap treatments include, but are not limited to, treatments with aluminum stearate, calcium stearate, 12-hydroxystearic acid, and the like.

[0050] Examples of fatty acid ester treatment include, but are not limited to, treatment with dextrin fatty acid ester, cholesterol fatty acid ester, sucrose fatty acid ester, starch fatty acid ester, etc.

[0051] For the silylation treatment, for example, silylated silica sold by Dow Corning under the name VM-2270 can be used, but the present invention is not limited to this.

[0052] In the present invention, the particle size of the hydrophobic treated silica powder is not particularly limited and may be, for example, 0.01 to 20 μm. The particle size can be evaluated as the particle diameter equivalent to a circle with an area when observed with a transmission electron microscope.

[0053] In the present invention, one or more kinds of hydrophobic treated silica powders can be used.In the composition of the present invention, the content of the hydrophobic treated silica powder is not particularly limited, and may be, for example, 0.5 mass% or more, 1.0 mass% or more, 1.5 mass% or more, 2.0 mass% or more, 2.5 mass% or more, 3.0 mass% or more, 3.5 mass% or more, 4.0 mass% or more, 4.5 mass% or more, 5.0 mass% or more, 5.5 mass% or more, or 6.0 mass% or more, and may be 10 mass% or less, 9.5 mass% or less, 9.0 mass% or less, 8.5 mass% or less, 8.0 mass% or less, 7.5 mass% or less, 7.0 mass% or less, 6.5 mass% or less, or 6.0 mass% or less.

[0054] <Oil> The composition of the present invention contains an oil.

[0055] In the composition of the present invention, the oil content is not particularly limited and may be, for example, 5.0% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, 40% by mass or more, or 50% by mass or more, and may be 60% by mass or less, 55% by mass or less, 50% by mass or less, 45% by mass or less, 40% by mass or less, 35% by mass or less, or 30% by mass or less.

[0056] In the present invention, the oil component is not particularly limited and may include, for example, a polar oil, a silicone oil, or a hydrocarbon oil. From the viewpoint of dissolving the above-mentioned compound I, the composition of the present invention preferably includes a polar oil. Furthermore, from the viewpoint of suppressing stickiness, the composition of the present invention preferably includes a silicone oil.

[0057] (Polar Oil) In the present invention, "polar oil" refers to an oil with high polarity among oils that can be used in cosmetics other than silicone oil, and refers to, for example, an oil with an IOB value of 0.10 or more, 0.11 or more, 0.12 or more, or 0.13 or more. Furthermore, the IOB value of the polar oil according to the present invention may be 0.50 or less, 0.45 or less, or 0.40 or less. The IOB value is an abbreviation for Inorganic / Organic Balance (inorganic / organic ratio), and is a value that represents the ratio of the inorganic value to the organic value, and is an index that indicates the degree of polarity of an organic compound. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value. The "inorganic value" and "organic value" are set according to the type of atom or functional group, such as 20 for one carbon atom in a molecule and 100 for one hydroxyl group. The IOB value of an organic compound can be calculated by integrating the "inorganic values" and "organic values" of all atoms and functional groups in the organic compound (see, for example, "Organic Conceptual Diagram - Fundamentals and Applications" by Yoshio Koda, pp. 11-17, Sankyo Publishing, 1984).

[0058] In the present invention, oils having an IOB value of 0.10 or more and used as ultraviolet absorbents are excluded from the term "polar oil" herein.

[0059] In the present invention, the polar oil may be, for example, at least one selected from the group consisting of ester oil, ether oil, higher alcohol, and fatty acid, each having an IOB value of 0.10 or more.

[0060] More specifically, polar oils include, for example, bisethoxydiglycol cyclohexane-1,4-dicarboxylate (IOB 1.03), phenoxyethyl caprylate (IOB 0.29), PPG-30 buteth-30 (IOB 0.94), diisopropyl sebacate (IOB 0.4), neopentyl glycol diheptanoate (IOB 0.33), diethylhexyl succinate (IOB 0.32), isononyl isononanoate (IOB 0.2), isopropyl myristate (IOB value = 0.18), octyl palmitate (IOB value = 0.13), palmitic acid Isopropyl (IOB value = 0.16), butyl stearate (IOB value = 0.14), hexyl laurate (IOB value = 0.17), myristyl myristate (IOB value = 0.11), decyl oleate (IOB value = 0.11), isotridecyl isononanoate (IOB value = 0.15), cetyl ethylhexanoate (IOB value = 0.13), pentaerythrityl tetraethylhexanoate (IOB value = 0.35), dioctyl succinate (IOB value = 0.36), glycol distearate (IOB value = 0.16), glyceryl diisostearate (IOB value = 0.18), IOB value = 0.29), neopentyl glycol dicaprate (IOB value = 0.25), diisostearyl malate (IOB value = 0.28), trimethylolpropane triisostearate (IOB value = 0.16), glyceryl tri-2-ethylhexanoate (triethylhexanoin) (IOB value = 0.35), trimethylolpropane trioctanoate (IOB value = 0.33), trimethylolpropane triisostearate (IOB value = 0.16), diisobutyl adipate (IOB value = 0.46), N-lauroyl-L-glutamate-2-octyl The alkyl acrylate may be at least one selected from the group consisting of ethyldodecyl ester (IOB value=0.29), 2-hexyldecyl adipate (IOB value=0.16), ethylhexyl methoxycinnamate (IOB value=0.28), 2-ethylhexyl palmitate (IOB value=0.13), 2-ethylhexyl ethylhexanoate (IOB value=0.2), triisostearin (IOB value=0.16), PPG-3 dipivalate (IOB value=0.52), and caprylic / capric triglyceride (IOB value=0.33), but is not limited thereto.

[0061] In the present invention, the amount of polar oil contained in the oil content is not particularly limited, and may be, for example, 5.0 parts by mass or more, 10 parts by mass or more, 15 parts by mass or more, or 20 parts by mass or more, relative to 100 parts by mass of the total oil content, and may be 90 parts by mass or less, 80 parts by mass or less, 70 parts by mass or less, 60 parts by mass or less, 50 parts by mass or less, 40 parts by mass or less, 30 parts by mass or less, or 20 parts by mass or less.

[0062] (Silicone Oil) In the present invention, silicone oil refers to oils that can be used in cosmetics and have a main skeleton formed by siloxane bonds.

[0063] In the present invention, the silicone oil may be a volatile silicone oil or a non-volatile silicone oil. From the viewpoint of usability and stability, the silicone oil is preferably a volatile silicone oil.

[0064] In the present invention, the boiling point at 1 atmosphere (101.325 kPa) can be used as an indicator of "volatility." This boiling point may be, for example, 250°C or less, 240°C or less, or 230°C or less, or 80°C or more, 100°C or more, 120°C or more, 150°C or more, or 160°C or more. In the present disclosure, "non-volatile" refers to a substance that exhibits a volatile content of 5% or less when a sample is placed in a sufficiently large flat-bottomed dish and left at 105°C for 3 hours.

[0065] In the present invention, the silicone oil may be either an acyclic silicone oil (i.e., a chain silicone oil) or a cyclic silicone oil. From the viewpoint of usability, the silicone oil is preferably an acyclic silicone oil.

[0066] Specific examples of silicone oils include, but are not limited to, acyclic silicone oils such as polydimethylsiloxane (dimethicone), trisiloxane, caprylyl methicone, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, cyclic silicone oils such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane, and mixtures of two or more thereof. Among these, volatile acyclic silicone oils such as polydimethylsiloxane (dimethicone) and trisiloxane are particularly preferred.

[0067] In the present invention, the amount of silicone oil contained in the oil content is not particularly limited, and may be, for example, 5.0 parts by mass or more, 10 parts by mass or more, 15 parts by mass or more, or 20 parts by mass or more, relative to 100 parts by mass of the total oil content, and may be 90 parts by mass or less, 80 parts by mass or less, 70 parts by mass or less, 60 parts by mass or less, 50 parts by mass or less, 40 parts by mass or less, 30 parts by mass or less, or 20 parts by mass or less.

[0068] (Hydrocarbon Oil) In the present invention, the hydrocarbon oil refers to a hydrocarbon oil other than the above-mentioned polar oils.

[0069] The hydrocarbon oil may be a volatile hydrocarbon oil or a non-volatile hydrocarbon oil.

[0070] Specific examples of hydrocarbon oils include, but are not limited to, decane, dodecane, isododecane, isohexadecane, liquid paraffin, squalane, squalene, paraffin, and mixtures of two or more thereof.

[0071] <Other Components> In addition to the above-mentioned components, the composition of the present invention may further contain other components that can be used in the field of cosmetics. Examples of other components include, but are not limited to, any aqueous component, ultraviolet scattering agent particles, surfactants, water-soluble components, moisturizers, sequestering agents, natural and synthetic polymers, water-soluble and oil-soluble polymers, various extracts, coloring agents such as organic dyes, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, cooling agents, antiperspirants, disinfectants, skin activators, other drugs, and various powders.

[0072] (Aqueous Component) The composition of the present invention may contain water as an aqueous component. The water is not particularly limited and may be ion-exchanged water or the like.

[0073] When the composition of the present invention contains an aqueous component, the content thereof is not particularly limited and may be, for example, 5.0% by mass or more, 10% by mass or more, 12% by mass or more, 15% by mass or more, 18% by mass or more, 20% by mass or more, 22% by mass or more, 25% by mass or more, 28% by mass or more, 30% by mass or more, 32% by mass or more, 35% by mass or more, 38% by mass or more, 40% by mass or more, 42% by mass or more, or 45% by mass or more, and may be 70% by mass or less, 60% by mass or less, or 50% by mass or less.

[0074] (Ultraviolet Scattering Agent Particles) From the viewpoint of enhancing the ultraviolet protection effect, the composition of the present invention preferably further contains ultraviolet scattering agent particles.

[0075] The ultraviolet scattering agent particles are not particularly limited, and may be, for example, at least one selected from the group consisting of titanium oxide, zinc oxide, iron oxide, and cerium oxide.

[0076] The ultraviolet scattering agent particles may be hydrophobized. Here, the hydrophobization treatment may be carried out using a known surface treatment agent for hydrophobization, and examples thereof include fatty acid treatment, fatty acid ester treatment, fatty acid soap treatment, fluorine compound treatment, silicone treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil treatment, N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment, plasma treatment, mechanochemical treatment, silane compound treatment, and silazane compound treatment.

[0077] The average primary particle diameter of the ultraviolet scattering agent particles is not particularly limited and may be, for example, 5 nm or more, 10 nm or more, or 15 nm or more, or 200 nm or less, 100 nm or less, or 50 nm or less. The "average primary particle diameter" may be determined as the diameter of a circle equivalent to the projected area of ​​the primary particles in an SEM image.

[0078] The shape of the ultraviolet scattering agent particles is not particularly limited, and examples thereof include spherical, plate-like, rod-like, spindle-like, needle-like, and irregular shapes.

[0079] In the composition of the present invention, when ultraviolet scattering agent particles are contained, the content thereof is not particularly limited and is, for example, from 1.0% by mass to 15% by mass.

[0080] (Surfactant) In the present invention, the surfactant may be one that functions as a dispersant, one that functions as an emulsifier, or one that has both of these functions.

[0081] The surfactant is not particularly limited, and examples thereof include isostearic acid, PEG-10 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, and lauryl PEG-9 polydimethylsiloxyethyl dimethicone, but are not limited thereto.

[0082] In the composition of the present invention, when a surfactant is contained, the content thereof is not particularly limited and is, for example, from 0.5% by mass to 10% by mass.

[0083] (Water-soluble component) The composition of the present invention may further comprise a water-soluble component such as a lower alcohol, including, but not limited to, ethanol, propanol, butanol, pentanol, and hexanol.

[0084] Furthermore, when a water-soluble component is contained, its content is not particularly limited and may be, for example, 1.0 to 20% by mass.

[0085] <Viscosity of the Composition of the Present Invention> When measured at a temperature of 30°C and a rotational speed of 12 rpm, the viscosity of the composition of the present invention may be 500 mPa·s or more, 800 mPa·s or more, 1,000 mPa·s or more, 1,500 mPa·s or more, or 2,000 mPa·s or more, from the viewpoint of suppressing dripping during application; and may be 10,000 mPa·s or less, 8,000 mPa·s or less, 5,000 mPa·s or less, or 3,000 mPa·s or less, from the viewpoint of improving spreadability and ease of application.

[0086] <Form of the composition of the present invention> The form of the composition of the present invention is not particularly limited and may be, for example, a cream, emulsion, liquid, or powder. The composition of the present invention may also be a water-in-oil type. Water-in-oil cosmetic compositions are preferably used from the viewpoints of moisturizing properties, water resistance, etc.

[0087] The composition of the present invention may be of a two-layer separation type that separates into two layers when left to stand and is shaken when used.

[0088] <Uses of the Composition of the Present Invention> The composition of the present invention can be suitably used as a cosmetic or a raw material thereof. That is, the present invention particularly provides a sunscreen cosmetic composition.

[0089] <Method for producing the composition of the present invention> The composition of the present invention can be produced based on a method for preparing ordinary cosmetics. For example, when the composition of the present invention is a water-in-oil cosmetic composition, the composition of the present invention can be produced by preparing an aqueous phase component and an oil phase component separately, gradually adding the aqueous phase component to the oil phase, and emulsifying it using an emulsifier or the like as needed.

[0090] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0091] Examples, Comparative Examples, and Reference Examples Based on the formulations in Table 1 below, water-in-oil compositions of the Examples, Comparative Examples, and Reference Examples were prepared.

[0092] The compound I used was the compound represented by the following structural formula:

[0093] <Evaluation> <Viscosity> The viscosity of each of the compositions prepared above was measured at a temperature of 30° C. using a Brookfield viscometer with rotor number 3 at a rotation speed of 12 rpm. The results are shown in Table 1.

[0094] <Usability> The usability of each of the compositions prepared above when directly applied to the face was evaluated based on the following criteria. The evaluation was comprehensively carried out by three panelists. The results are shown in Table 1.

[0095] (Sticky feeling after application) "A": No sticky feeling felt; "B": Slightly sticky feeling felt; "C": Sticky feeling felt.

[0096] (Weight of spread when applied) "A": No weight of spread; "B": Somewhat weight of spread; "C": Weight of spread.

[0097] (Familiarity) "A": Feels like it's familiar; "B": Feels like it's not very familiar; "C": Feels like it's not familiar at all.

[0098]

[0099] As is clear from Table 1, there was no difference in usability between the composition of Reference Example 1 (containing untreated silica powder) which did not contain Compound I and the composition of Reference Example 2 (containing hydrophobically treated silica powder), and both were found to have good usability.

[0100] On the other hand, it was found that the compositions of Comparative Examples 1 and 2 containing Compound I were inferior in usability to the compositions of Reference Examples 1 and 2, despite the use of untreated silica powder.

[0101] In contrast, the compositions of Examples 1 and 2 containing Compound I were able to obtain favorable usability, with improved usability due to the inclusion of hydrophobic treated silica powder, compared to the compositions of Comparative Examples 1 and 2. This result suggests that the hydrophobic treated silica powder can specifically improve the usability of compositions containing Compound I.

Claims

1. A cosmetic composition comprising an ultraviolet absorber, hydrophobized silica powder, and an oil component, and the ultraviolet absorber contains a compound I having the structure of the following formula (I): 【Chemical 1】 (In the formula, -OA represents an alkoxy group)

2. The composition according to claim 1, wherein the content of the compound I is 0.01 to 5.0% by mass.

3. The content of the ultraviolet absorber is 3.0 to 25% by mass; the content of the hydrophobized silica powder is 0.5 to 10% by mass; and the content of the oil component is 5.0 to 60% by mass, The composition according to claim 1.

4. The composition according to claim 1, wherein the hydrophobized silica powder is a silicone-treated silica powder.

5. The composition according to claim 1, wherein the oil component contains a polar oil.

6. The composition according to claim 1, wherein the oil component contains a silicone oil.

7. The composition according to claim 6, wherein the silicone oil contains a volatile acyclic silicone oil.

8. The composition according to claim 1, further comprising ultraviolet scattering agent particles.

9. The composition according to any one of claims 1 to 8, having a viscosity of 500 mPa·s to 10,000 mPa·s when measured at a temperature of 30 °C and a rotational speed of 12 rpm.

10. The composition according to any one of claims 1 to 8, which is an oil-in-water type.

11. The composition according to any one of claims 1 to 8, which is a two-layer separation type to be shaken before use.

12. The composition according to any one of claims 1 to 8, which is a sunscreen cosmetic.

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