Cosmetic

Abstract

Provided is a cosmetic which contains a composite powder of titanium oxide and 4-tert-butyl-4 '-methoxydibenzoylmethane, and ethylhexyl methoxycinnamate, and which has excellent ultraviolet shielding effect and long-term stability. The invention discloses a cosmetic. The present invention relates to a cosmetic containing a composite powder of titanium oxide and 4-tert-butyl-4 '-methoxydibenzoylmethane, and ethylhexyl methoxycinnamate, the content of the composite powder being 3.0-30.0 mass% with respect to the total mass of the cosmetic, and the content ratio of the ethylhexyl methoxycinnamate with respect to the composite powder being 0.10-0.80 by mass.

Description

TECHNICAL FIELD

[0001] The present application relates to a cosmetic. BACKGROUND

[0002] Since ultraviolet rays are a cause of skin wrinkles, sagging, dullness, and the like, light aging, in order to improve the ultraviolet ray shielding effect of skin external agents such as cosmetics, various technologies incorporating ultraviolet ray protection agents have been proposed.

[0003] In Patent Literature 1, a water-in-oil type cosmetic is disclosed, which contains: at least one ultraviolet ray preventive agent selected from the group consisting of an oil agent containing a silicone oil, a modified silicone surfactant having a hydrophilic-lipophilic balance of less than 6, an ultraviolet ray absorbing agent, and an ultraviolet ray scattering agent; a water-absorbing polymer in an amount of more than 0 mass% and 5 mass% or less relative to the total amount of the water-in-oil type cosmetic; and water.

[0004] In Patent Literature 2, a sunscreen cosmetic is disclosed, which contains: (A) a UVA absorbing agent; (B) a UVB absorbing agent; (C) a light-responsive capsule containing at least one DNA, and containing a wall membrane that is decomposed by at least a part of light irradiation and an oil-soluble antioxidant component contained in the wall membrane; (D) at least one ester oil that is a liquid at 20°C selected from the group consisting of isopropyl lauroyl sarcosinate, caprylic acid / capric acid triglyceride, diisopropyl sebacate, and diethyl sebacate; and (E) water, the content of (B) is 1 mass% or more and 3 mass% or less relative to the total amount of the sunscreen cosmetic, and the total content of the ester oil of (D) is 1 mass% or more and 10 mass% or less relative to the total amount of the sunscreen cosmetic.

[0005] In Patent Literature 3, the use of an ultraviolet ray protection agent in the form of a composite material containing at least one nanoparticle of a metal derivative and at least one organic sunscreen agent derivative covalently chemically bonded to the nanoparticle is disclosed.

[0006] Patent Literature 1: Japanese Patent Application Laid-Open (kokai) No. 2019-38781

[0007] Patent Literature 2: Japanese Patent Application Laid-Open (kokai) No. 2016-8433

[0008] Patent Literature 3: Japanese Patent Application Laid-Open (kokai) No. 2009-503040

[0009] In cosmetics for the purpose of ultraviolet ray protection, represented by sunscreen cosmetics, in order to obtain a high ultraviolet ray protection effect, it is necessary to incorporate a sufficient amount of an ultraviolet ray protection agent as necessary. As the ultraviolet ray protection agent, an organic ultraviolet ray absorbing agent and an inorganic ultraviolet ray scattering agent (for example, inorganic powder such as titanium oxide, zinc oxide, and the like) can be cited, and a composite powder in which an inorganic powder is compounded with an ultraviolet ray absorbing agent as an organic compound is also known.

[0010] The composite powder of titanium oxide and organic ultraviolet absorber has a high ultraviolet absorption effect, and is therefore useful for cosmetics in which a high ultraviolet shielding effect is desired. Various improvements have been made with respect to cosmetics containing such a composite powder. Among the organic ultraviolet absorbers, 4-tert-butyl-4'-methoxydibenzoylmethane (alias: avobenzone) is the most capable of absorbing long-wave ultraviolet rays among the ultraviolet absorbers that can be used in cosmetics, and is therefore the most suitable as an ultraviolet absorber that is made into a composite powder with an inorganic powder.

[0011] However, if a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane (hereinafter, also referred to as "avobenzone composite titanium oxide") is incorporated in large amounts in a cosmetic, the feeling of use can sometimes become poor. Therefore, in order to further improve the ultraviolet protection effect, it is preferable to use avobenzone composite titanium oxide and another ultraviolet protection agent at the same time. If an inorganic ultraviolet scattering agent such as titanium oxide or zinc oxide is incorporated in a cosmetic as an inorganic powder, the feeling of use can be deteriorated due to the presence of the powder, and therefore, among the other ultraviolet protection agents that improve the ultraviolet protection effect when used at the same time as avobenzone composite titanium oxide, the incorporation of an organic ultraviolet absorber is preferred over the incorporation of an inorganic ultraviolet scattering agent. On the other hand, among the organic ultraviolet absorbers, there are many that are oil-soluble and solid, and the dissolution of an oil-soluble and solid ultraviolet absorber requires the use of an ester oil that has a high polarity. However, the incorporation of an ester oil in a cosmetic can sometimes result in a greasy feeling of use, and is therefore not preferred.

[0012] Since ethylhexyl methoxy cinnamate is a liquid ultraviolet absorber, it can be considered that the use of avobenzone composite titanium oxide and ethylhexyl methoxy cinnamate achieves a balance between the improvement of the ultraviolet protection effect and the feeling of use. However, ethylhexyl methoxy cinnamate has the function of a solvent that dissolves a solid ultraviolet absorber, and therefore the simultaneous use of ethylhexyl methoxy cinnamate and avobenzone composite titanium oxide can sometimes result in the following problem: after a cosmetic is left to stand for a certain period of time, avobenzone is dissolved out of the avobenzone composite titanium oxide and recrystallizes, thereby producing a precipitate, and a cosmetic that is constituted as an emulsion separates into layers. SUMMARY

[0013] The present application was completed in view of the circumstances described above.

[0014] An object of one embodiment of the present application is to provide a cosmetic that contains a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane and ethylhexyl methoxy cinnamate, and that has an excellent ultraviolet shielding effect and excellent stability over time.

[0015] The present application includes the following modes.

[0016] A cosmetic containing a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane and ethylhexyl methoxycinnamate, the content of the composite powder being 3.0 to 30.0 mass% relative to the total mass of the cosmetic, and the content of ethylhexyl methoxycinnamate relative to the composite powder being 0.10 to 0.80 on a mass basis.

[0017] <2> The cosmetic according to <1>, wherein the content of the composite powder is 3.0 mass% or more and 21.0 mass% or less relative to the total mass of the cosmetic.

[0018] <3> The cosmetic according to <1> or <2>, further containing a solid oil-soluble ultraviolet absorber.

[0019] <4> The cosmetic according to any one of <1> to <3>, further containing water-dispersible ultraviolet absorber particles.

[0020] <5> The cosmetic according to any one of <1> to <4>, further containing zinc oxide.

[0021] <6> The cosmetic according to any one of <1> to <5>, which is a water-in-oil type cosmetic.

[0022] <7> The cosmetic according to any one of <1> to <6>, which is a sunscreen cosmetic.

[0023] Effects of the Invention

[0024] According to an embodiment of the present application, it is possible to provide a cosmetic containing a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane and ethylhexyl methoxycinnamate, and which has excellent ultraviolet shielding effect and stability over time. DETAILED DESCRIPTION

[0025] Hereinafter, an example of an embodiment of the cosmetic according to the present application will be described in detail.

[0026] In the present application, a numerical range indicated using "~" indicates a range including the values recited before and after "~" as the minimum value and the maximum value, respectively.

[0027] In the numerical range recited in stages in the present application, the upper limit value or the lower limit value recited in a certain numerical range can be replaced with the upper limit value or the lower limit value of the other recited numerical range in stages. Also, in the numerical range recited in the present application, the upper limit value or the lower limit value recited in a certain numerical range can be replaced with the value shown in the examples.

[0028] In the present application, when a plurality of substances corresponding to each component are present in the cosmetic, the amount of each component in the cosmetic refers to the total amount of the plurality of substances present in the cosmetic, unless otherwise specified.

[0029] In the present application, combinations of two or more of the preferred modes are more preferred modes.

[0030] In the present application, "oil phase" refers to the continuous phase in a water-in-oil type formulation, and refers to the dispersed phase in an oil-in-water type formulation, a liquid medium containing the oil phase and a component dispersed or dissolved in the liquid medium.

[0031] In the present application, "water phase" refers to the dispersed phase in a water-in-oil type formulation, and refers to the continuous phase in an oil-in-water type formulation, a liquid medium containing the dispersed phase and a component dispersed or dissolved in the liquid medium.

[0032] In the present application, "mass%" and "weight%" have the same meaning.

[0033] In the present application, "excellent in stability over time" of the cosmetic means that the properties of the cosmetic are maintained over a prescribed period. As factors that impair the properties of the cosmetic, there can be mentioned the generation of precipitates, the precipitation of crystalline substances, delamination, and the like. The prescribed period can be the storage period set in the cosmetic.

[0034] [cosmetic]

[0035] The cosmetic according to the present application contains a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane (avobenzone composite titanium oxide) and ethylhexyl methoxy cinnamate, the content ratio of the avobenzone composite titanium oxide is 3.0 mass% to 30.0 mass% relative to the total mass of the cosmetic, and the content ratio of ethylhexyl methoxy cinnamate relative to the avobenzone composite titanium oxide is 0.10 to 0.80 on a mass basis.

[0036] The cosmetic according to the present application contains avobenzone composite titanium oxide and ethylhexyl methoxy cinnamate, and is excellent in ultraviolet shielding effect and stability over time.

[0037] The cosmetic according to the present application is preferably an emulsified composition. As the emulsified composition, it can be an oil-in-water type emulsified composition (O / W type emulsified composition), or it can be a water-in-oil type emulsified composition (W / O type emulsified composition), and the selection can be made according to the use of the cosmetic.

[0038] From the viewpoint of stably containing the ultraviolet absorbing component such as avobenzone composite titanium oxide, the cosmetic according to the present application is preferably a water-in-oil type emulsified composition (W / O type emulsified composition). That is, the cosmetic according to the present application is more preferably a water-in-oil type cosmetic (W / O type cosmetic).

[0039] In the case where the cosmetic according to the present application is an oil-in-water emulsion composition (O / W emulsion composition) or a water-in-oil emulsion composition (W / O emulsion composition), the ratio of the water phase / oil phase is preferably 10 / 90 to 30 / 70, more preferably 20 / 80 to 60 / 40, and further preferably 25 / 75 to 45 / 55, on a mass basis, from the viewpoint of suppressing changes in the application surface over time.

[0040] Meanwhile, when avobenzone complex titanium oxide and ethylhexyl methoxy cinnamate are used together, an excellent ultraviolet shielding effect can be expected. On the other hand, as described above, cosmetics containing avobenzone complex titanium oxide and ethylhexyl methoxy cinnamate sometimes have problems such as the generation of precipitates, the precipitation of crystals, and delamination after a certain period of time.

[0041] In view of this, the cosmetic according to the present application contains avobenzone complex titanium oxide and ethylhexyl methoxy cinnamate, the content of the avobenzone complex titanium oxide is 3.0 mass% to 30.0 mass% relative to the total mass of the cosmetic, and the content ratio of the ethylhexyl methoxy cinnamate relative to the specific complex powder is 0.10 to 0.80 on a mass basis, whereby, although it is a cosmetic containing avobenzone complex titanium oxide and ethylhexyl methoxy cinnamate, the ultraviolet shielding effect and the stability over time are excellent.

[0042] On the other hand, in the above-described Patent Document 1 (Japanese Patent Application Publication No. 2019-38781), Patent Document 2 (Japanese Patent Application Publication No. 2016-8433), and Patent Document 3 (Japanese Patent Application Publication No. 2009-503040), there is no focus on improving the ultraviolet shielding effect and the stability over time in cosmetics containing avobenzone complex titanium oxide and ethylhexyl methoxy cinnamate.

[0043] In addition, in Patent Document 1, an example of a water-in-oil cosmetic in which a titanium oxide is coated with an ultraviolet absorber and a silicone-15, which is an oil-soluble ultraviolet absorber in a liquid state, is combined, but the function of the silicone-15 as a solvent for dissolving the ultraviolet absorber is small relative to the ethylhexyl methoxy cinnamate. Therefore, even if the titanium oxide coated with the ultraviolet absorber and the silicone-15 are present at the same time, the silicone-15 does not function as a solvent for dissolving the ultraviolet absorber, and thus problems such as the elution of the ultraviolet absorber from the titanium oxide coated with the ultraviolet absorber do not occur. In Patent Document 3, a combination of a complex powder of titanium oxide and hydroxy methoxy benzophenone sulfonic acid and ethylhexyl methoxy cinnamate is described, but the hydroxy methoxy benzophenone sulfonic acid is water-soluble. Therefore, even if the complex powder of titanium oxide and hydroxy methoxy benzophenone sulfonic acid and the ethylhexyl methoxy cinnamate are present at the same time, problems such as the elution of the hydroxy methoxy benzophenone sulfonic acid from the complex powder do not occur.

[0044] Next, the components contained in the cosmetic according to the present application will be described in detail.

[0045] <Composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane (avobenzone composite titanium oxide)>

[0046] The cosmetic according to the present application contains a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane (avobenzone composite titanium oxide).

[0047] In the cosmetic according to the present application, the avobenzone composite titanium oxide can contain one kind alone, or two or more kinds.

[0048] The cosmetic according to the present application can improve the shielding effect of ultraviolet rays (UVA region and / or UVB region) harmful to the skin by containing the avobenzone composite titanium oxide.

[0049] The titanium oxide constituting the avobenzone composite titanium oxide is not particularly limited, and can be titanium oxide of any crystal type such as anatase type, rutile type, and brookite type. From the viewpoint of improving the ultraviolet shielding ability, the crystal type of the titanium oxide is preferably the rutile type.

[0050] The titanium oxide can be titanium oxide surface-treated with inorganic substances such as aluminum hydroxide, silicon oxide, and zirconium oxide, or titanium oxide surface-treated with fatty acids such as stearic acid, isostearic acid, and lauric acid, or titanium oxide surface-treated with both inorganic substances and fatty acids. By surface-treating the titanium oxide with inorganic substances such as aluminum hydroxide, the titanium oxide can be deactivated. Also, by surface-treating the titanium oxide with fatty acids such as stearic acid, the surface of the titanium oxide can be hydrophobized.

[0051] From the viewpoints of the ultraviolet shielding effect and the transparency of the cosmetic, the average primary particle diameter of the titanium oxide is preferably, for example, 1 nm to 90 nm, and more preferably 5 nm to 50 nm. The average primary particle diameter of the titanium oxide is determined as follows: 1000 or more particles are photographed using a transmission electron microscope, and the photographed particles are subjected to image processing using an image analysis particle size distribution measuring device, and the circular equivalent diameter is measured to obtain the value. In the case where a commercially available product is used as the titanium oxide, the average primary particle diameter described in the catalog or the like can be directly used.

[0052] In the avobenzone composite titanium oxide, from the viewpoint of the shielding effect of ultraviolet rays in the vicinity of the UVA region, the ultraviolet absorber complexed with the titanium oxide is 4-tert-butyl-4'-methoxydibenzoylmethane. Hereinafter, 4-tert-butyl-4'-methoxydibenzoylmethane will be appropriately referred to as its alias, avobenzone.

[0053] As for the avobenzone composite titanium oxide, a surface treatment layer containing avobenzone is preferably present on the surface of the titanium oxide. The surface treatment layer is preferably present on the entire surface of the titanium oxide, but a portion without the surface treatment layer can also be present. The bonding mode of the surface of the titanium oxide (in the case where the surface of the titanium oxide is surface-treated with at least one of an inorganic substance and a fatty acid, the inorganic substance or the fatty acid disposed on the surface) and avobenzone is not particularly limited as long as the titanium oxide and avobenzone are integrally exhibited, and can be chemical bonding such as covalent bonding, or non-chemical bonding such as adsorption.

[0054] In addition, the presence of avobenzone on the surface of the titanium oxide can be confirmed by measuring the reflectance spectrum of the avobenzone composite titanium oxide.

[0055] The ratio of the titanium oxide to avobenzone in the avobenzone composite titanium oxide is not particularly limited. From the viewpoint of ultraviolet shielding ability, for example, 0.03 parts by mass to 1 part by mass of avobenzone can be provided with respect to 1 part by mass of the titanium oxide.

[0056] The average particle diameter of the avobenzone composite titanium oxide is preferably less than 1 μm. If the average particle diameter of the avobenzone composite titanium oxide is less than 1 μm, the coloring of the cosmetic due to the avobenzone composite titanium oxide itself can be suppressed, and the so-called whitening is less likely to occur. From the viewpoints of the ultraviolet shielding effect and the use feeling, the average particle diameter of the avobenzone composite titanium oxide is more preferably 1 nm to 500 nm, and further preferably 3 nm to 100 nm.

[0057] The average particle diameter of the avobenzone composite titanium oxide can be measured by the same method as the average primary particle diameter of the titanium oxide.

[0058] As the avobenzone composite titanium oxide, for example, the composite powder disclosed in International Publication No. 2010 / 098249 can be used. The avobenzone composite titanium oxide can also be obtained as a commercial product. As the commercial product of the composite powder, HXMT-100ZA, HXMT-10EXA, and the like of TAYCA Co., Ltd. can be given. HXMT-100ZA is a composite powder in which a surface treatment layer containing 4-tert-butyl-4'-methoxydibenzoylmethane is formed on the surface of titanium oxide surface-treated with aluminum hydroxide and stearic acid. HXMT-10EXA is a composite powder in which a surface treatment layer containing 4-tert-butyl-4'-methoxydibenzoylmethane is formed on the surface of titanium oxide surface-treated with aluminum hydroxide and isostearic acid.

[0059] The content of the avobenzone composite titanium oxide is 3.0 to 30.0 mass% relative to the total mass of the cosmetic, and from the viewpoint of further improving the ultraviolet ray shielding ability and the use feeling, it is preferably 3.0 to 21.0 mass%, and more preferably 3.0 to 18.0 mass%.

[0060] In the case where the cosmetic is an emulsified product, the avobenzone composite titanium oxide can be contained in either the oil phase or the water phase. From the viewpoint of water resistance, use feeling (smooth feeling, refreshing feeling), and improvement of the ultraviolet ray shielding effect of the cosmetic, it is preferable that the avobenzone composite titanium oxide be contained in the oil phase.

[0061] For example, in the case where the avobenzone composite titanium oxide is compounded into the oil phase, a slurry can be prepared using an oil agent such as silicone oil, and the other ingredients can be compounded in the form of the slurry.

[0062] The content of the avobenzone composite titanium oxide in the slurry is not particularly limited. Generally, the content of the composite powder in the slurry is preferably set to 10 to 80 mass% of the total mass of the slurry, and more preferably to 20 to 60 mass%. If the content of the avobenzone composite titanium oxide in the slurry is within the above range, there is a tendency to stably contain the avobenzone composite titanium oxide in the cosmetic.

[0063] <ETHYLHEXYL METHOXYCINNAMATE>

[0064] The cosmetic according to the present application contains ethylhexyl methoxycinnamate.

[0065] Since the ethylhexyl methoxycinnamate has excellent shielding ability against UVB waves, by the cosmetic according to the present application containing both the avobenzone composite titanium oxide and the ethylhexyl methoxycinnamate, it is possible to uniformly shield UVA waves and UVB waves.

[0066] Further, the ethylhexyl methoxycinnamate has a function as a solvent for dissolving a solid ultraviolet ray absorbing agent, and therefore, in the case where the cosmetic according to the present application further contains a solid and oil-soluble ultraviolet ray absorbing agent described later as another ultraviolet ray absorbing agent, it is also possible to function as a dissolving solvent therefor.

[0067] In the cosmetic according to the present application, the content ratio of the ethylhexyl methoxycinnamate to the avobenzone composite titanium oxide is 0.10 to 0.80 on a mass basis, and more preferably 0.20 to 0.80. By the content ratio of the ethylhexyl methoxycinnamate to the avobenzone composite titanium oxide being 0.10 to 0.80, the elution of avobenzone from the avobenzone composite titanium oxide is effectively suppressed.

[0068] <OTHER ULTRAVIOLET RAY ABSORBING AGENT>

[0069] From the viewpoint of further improving the ultraviolet shielding effect, the cosmetic according to the present application preferably contains, in addition to the avobenzone composite titanium oxide and the ethylhexyl methoxy cinnamate, another ultraviolet absorber. As the other ultraviolet absorber, a solid oil-soluble ultraviolet absorber and a water-dispersible ultraviolet absorber particle can be preferably selected.

[0070] - solid oil-soluble ultraviolet absorber -

[0071] From the viewpoint of further improving the ultraviolet shielding effect, the cosmetic according to the present application preferably contains, in addition to the avobenzone composite titanium oxide and the ethylhexyl methoxy cinnamate, another ultraviolet absorber. As the other ultraviolet absorber, a solid oil-soluble ultraviolet absorber and a water-dispersible ultraviolet absorber particle can be preferably selected.

[0072] In the present application, the ultraviolet absorber is "solid" in the sense that, under the conditions of atmospheric pressure and standard temperature (Japanese Pharmacopoeia: 20°C), the ultraviolet absorber is in a solid form that does not flow and deform due to its own weight or in a paste form that does not flow and deform due to its own weight.

[0073] In the present application, the "oil-soluble ultraviolet absorber" is an ultraviolet absorber that dissolves 1 part by mass or more with respect to 100 parts by mass of ethylhexyl methoxy cinnamate at a liquid temperature of 20°C.

[0074] As the solid oil-soluble ultraviolet absorber, for example, 4-tert-butyl-4'-methoxydibenzoylmethane, diethylamino hydroxybenzoyl hexyl benzoate, 2,4-bis-[{4-(2- ethylhexyloxy)-2-hydroxy}-phenyl]-6-(4-methoxyphenyl)-1,3,5-triazine, and 2,4,6-tris(4-(2- ethylhexyloxycarbonyl)anilino)-1,3,5-triazine can be mentioned.

[0075] In the cosmetic according to the present application, the content rate of the solid oil-soluble ultraviolet absorber is preferably 0.5% by mass to 10% by mass with respect to the total mass of the cosmetic, from the viewpoint of the ultraviolet shielding ability and the use feeling.

[0076] - water-dispersible ultraviolet absorber particle -

[0077] From the viewpoint of further improving the ultraviolet shielding effect, the cosmetic according to the present application preferably contains, in addition to the avobenzone composite titanium oxide and the ethylhexyl methoxy cinnamate, another ultraviolet absorber. As the other ultraviolet absorber, a solid oil-soluble ultraviolet absorber and a water-dispersible ultraviolet absorber particle can be preferably selected.

[0078] In the present application, "water-dispersible ultraviolet absorber particles" refer to particles of an oil-soluble ultraviolet absorber having a particle diameter of 1000 nm or less, and exhibit dispersibility in water at a liquid temperature of 20°C. The water-dispersible ultraviolet absorber particles can be either of a mode in which an oil-soluble ultraviolet absorber is micronized by pulverization, or a mode in which an oil-soluble ultraviolet absorber is encapsulated by being contained in a microcapsule.

[0079] The particle diameter of the water-dispersible ultraviolet absorber particles refers to a value obtained by photographing 1000 or more zinc oxides using a transmission electron microscope, image-processing each of the photographed particles using an image analysis type particle size distribution measuring device, and measuring the circular equivalent diameter.

[0080] In the case where a commercially available product is used as the water-dispersible ultraviolet absorber particles, the particle diameter described in a catalog or the like can be directly applied.

[0081] As the water-dispersible ultraviolet absorber particles, for example, particles of 2,4-bis-[{4-(2-ethylhexyloxy)-2-hydroxy}-phenyl]-6-(4-methoxyphenyl)-1,3,5-triazine and methylene bis-benzotriazolyl tetramethylbutylphenol can be given. The water-dispersible ultraviolet absorber particles can be incorporated into a cosmetic in a form in which fine particles are dispersed in water.

[0082] From the viewpoints of ultraviolet shielding ability and use feeling, as the water-dispersible ultraviolet absorber particles, particles of methylene bis-benzotriazolyl tetramethylbutylphenol are preferred.

[0083] In the cosmetic according to the present application, the content rate of the water-dispersible ultraviolet absorber particles is preferably 0.1 to 10 mass% relative to the total mass of the cosmetic, more preferably 0.3 to 6 mass%, and further preferably 0.5 to 3 mass%.

[0084] <Zinc Oxide>

[0085] The cosmetic according to the present application preferably further contains zinc oxide.

[0086] As the zinc oxide, there is no particular limitation as long as it is a zinc oxide that can be used in a cosmetic.

[0087] The zinc oxide can function as an ultraviolet scattering agent.

[0088] The form of the zinc oxide is preferably a powder.

[0089] The average primary particle diameter of the zinc oxide is not particularly limited, and for example, from the viewpoints of ultraviolet shielding ability and transparency of the cosmetic, it is preferably 1 to 90 nm, and more preferably 5 to 50 nm.

[0090] The average primary particle diameter of the zinc oxide is set as follows: 1000 or more of the zinc oxide is photographed using a transmission electron microscope, each of the photographed particles is subjected to image processing using an image analysis type particle size distribution measuring device, and the value obtained by measuring the circle equivalent diameter is determined.

[0091] In the case where a commercially available product is used as the zinc oxide, the average primary particle diameter described in the catalog or the like can be directly applied.

[0092] The zinc oxide can be zinc oxide of which a part of the surface is surface-treated, or can be zinc oxide of which the entire surface is surface-treated.

[0093] One preferred mode of the zinc oxide includes at least one zinc oxide (A) selected from the group consisting of zinc oxide surface-treated with a fatty acid (al) and zinc oxide surface-treated with an alkylalkoxysilane (a2).

[0094] In the zinc oxide (al), the fatty acid used for surface treatment of the zinc oxide is not particularly limited, and, for example, from the viewpoint of dispersion stability, a fatty acid having 10 to 22 carbon atoms is preferred, a fatty acid having 12 to 20 carbon atoms is more preferred, a fatty acid having 16 to 20 carbon atoms is further preferred, a fatty acid having 18 carbon atoms, i.e., stearic acid and / or isostearic acid, is particularly preferred, and isostearic acid is most preferred. That is, the zinc oxide (A) is most preferably zinc oxide surface-treated with isostearic acid.

[0095] In addition, the "fatty acid" described herein includes fatty acids and salts thereof.

[0096] As the salt, for example, a Ca salt, a Mg salt, a Zn salt, and an Al salt can be given.

[0097] The surface treatment of the zinc oxide with a fatty acid can be performed, for example, by mixing and stirring the zinc oxide in the fatty acid for a certain period of time.

[0098] In the zinc oxide (a2), the alkylalkoxysilane used for surface treatment of the zinc oxide is not particularly limited.

[0099] For example, from the viewpoint of dispersion stability, the alkyl group in the alkylalkoxysilane is preferably an alkyl group having 6 to 18 carbon atoms (for example, a hexyl group, an octyl group, a decyl group, and an octadecyl group).

[0100] For example, from the viewpoint of dispersion stability, the alkoxy group in the alkylalkoxysilane is preferably an alkoxy group having 1 to 3 carbon atoms (for example, a methoxy group, an ethoxy group, and a propoxy group).

[0101] As a specific example of the alkylalkoxysilane used for the surface treatment of zinc oxide, mention can be made of trimethoxylhexylsilane, trimethoxyl octylsilane, trimethoxyl decylsilane, trimethoxyl octadecylsilane, triethoxylhexylsilane, triethoxyl octylsilane (cosmetic designation: triethoxyl octylsilane), triethoxyl decylsilane, and triethoxyl octadecylsilane.

[0102] As the alkylalkoxysilane used for the surface treatment of zinc oxide, triethoxyl octylsilane is preferred.

[0103] The surface treatment of zinc oxide with an alkylalkoxysilane can be performed, for example, by mixing and stirring the zinc oxide in the alkylalkoxysilane for a certain period of time.

[0104] The zinc oxide (A) can be zinc oxide (al), can be zinc oxide (a2), or can be both zinc oxide (al) and zinc oxide (a2), but is preferably zinc oxide (a2), that is, zinc oxide that has been surface-treated with an alkylalkoxysilane, and more preferably zinc oxide that has been surface-treated with triethoxyl octylsilane.

[0105] The cosmetic according to the present application can contain only one kind of zinc oxide, or can contain two or more kinds.

[0106] The cosmetic according to the present application can contain only one or more kinds of zinc oxide (al) among zinc oxide (al) and zinc oxide (a2), can contain only one or more kinds of zinc oxide (a2) alone, or can contain one or more kinds of zinc oxide (al) and one or more kinds of zinc oxide (a2).

[0107] The content of zinc oxide in the cosmetic according to the present application is not particularly limited.

[0108] From the viewpoint of ultraviolet shielding ability and use feeling, the content of zinc oxide is preferably 3 to 25 mass%, and more preferably 5 to 20 mass%, relative to the total mass of the cosmetic.

[0109] Zinc oxide can be contained alone as one kind, or can be contained as two or more kinds. In the case where the cosmetic contains two or more kinds of zinc oxide, the above-mentioned content is the total content of the other particles.

[0110] <Other particles>

[0111] From the viewpoint of effectively inhibiting stickiness of the cosmetic-applied surface, the cosmetic according to the present application can contain particles other than the above-mentioned avobenzone composite titanium oxide, water-dispersible ultraviolet absorber particles, and zinc oxide ((hereinafter, also referred to as "other particles").

[0112] The other particles are preferably resin particles having a particle diameter of 1 to 50 μm, more preferably resin particles having a particle diameter of 3 to 50 μm, and further preferably resin particles having a particle diameter of 5 to 45 μm. By having a particle diameter of 1 μm or more, the resin particles have a tendency to improve the tackiness-inhibiting effect and to provide a good tactile sensation. Also, by having a particle diameter of 50 μm or less, the other particles have a tendency to further improve the tactile sensation by inhibiting the peeling of the particles of the cosmetic from the coating film, the remarkable protrusion, and the like.

[0113] In the present application, the particle diameter of the other particles refers to the average primary particle diameter obtained by arithmetically averaging the diameters converted into a circle, which are evaluated using a scanning electron microscope (SEM) for 100 particles.

[0114] The form of the resin particles can be spherical, plate-like, cubic, and the like even in a dry state, and particles maintaining such a clear three-dimensional structure are preferably used as the resin particles.

[0115] Examples of the other particles include particles of nylon, polyethylene, polypropylene, melamine, polyphenylene sulfide, polyether sulfone, polyamide-imide, polylactic acid, ethyl cellulose, polydimethylsiloxane (silicone), dimethiconol, vinyl dimethicone, silsesquioxane, polyethylene oxide or a crosslinked polymer thereof, an acrylate-based crosslinked polymer, collagen, and the like containing a resin or a high molecule, and from the viewpoint of inhibiting tackiness, particles containing an acrylate-based crosslinked polymer are preferred.

[0116] In the present application, the acrylate-based crosslinked polymer refers to a crosslinked polymer containing a structural unit derived from an acrylate and / or a methacrylate.

[0117] As the acrylate cross-linked polymer, there can be mentioned methyl methacrylate cross-linked polymer, (methyl methacrylate / ethylene glycol dimethacrylate) cross-linked polymer, (butyl acrylate / ethylene glycol dimethacrylate) cross-linked polymer, (acrylic acid / VP) cross-linked polymer, (acrylic acid / cholesteryl glyceryl phosphonocholine ethylene acrylate) cross-linked polymer, (acrylic acid Na / acryloyldimethyltaurine / dimethyl acrylamide) cross-linked polymer, (butyl acrylate / isopropyl acrylamide / PEG-18 dimethacrylate) cross-linked polymer, (acrylate / alkyl acrylate (C10-30)) cross-linked polymer, (acrylate / alkyl acrylate (C10-30)) cross-linked polymer K, (acrylate / alkyl acrylate (C10-30)) cross-linked polymer Na, (acrylate / ethylhexyl acrylate) cross-linked polymer, (acrylate / ethylhexyl acrylate / glycidyl methacrylate) cross-linked polymer, (acrylate / vinyl isodecanoate) cross-linked polymer, (acrylate / vinyl isodecanoate) cross-linked polymer Na, (acrylate / PEG-4 dimethacrylate) cross-linked polymer, (acrylate / vinyl neodecanoate) cross-linked polymer, (acrylate / alkyl methacrylate (C12, 13) / methoxyethyl acrylate) cross-linked polymer, (acrylate / stearyl methacrylate-20) cross-linked polymer, (acrylate / cetyl methacrylate-20) cross-linked polymer, (acrylate / trimethylsiloxy propyl methacrylate) cross-linked polymer, (acrylate / behenyl polyoxylethyl-25 methacrylate) cross-linked polymer Na, (acrylate / methoxy methacrylate PEG-90) cross-linked polymer, (acryloyldimethyltaurine Na / VP) cross-linked polymer, (acryloyldimethyltaurine Na / dipropylene glycol diacrylate) cross-linked polymer, (acryloyldimethyltaurine ammonium / carboxyethyl acrylate ammonium) cross-linked polymer, (acryloyldimethyltaurine ammonium / stearyl methacrylate-25) cross-linked polymer, (acryloyldimethyltaurine ammonium / behenyl polyoxylethyl-25 methacrylate) cross-linked polymer, (hexanediol dimethacrylate / ethylene glycol dimethacrylate) cross-linked polymer, (styrene / acrylate / polydimethylsiloxane acrylate) cross-linked polymer, (styrene / stearyl methacrylate) cross-linked polymer, (polyurethane-24 / methyl methacrylate) cross-linked polymer, (diethylaminoethyl methacrylate / HEMA / perfluorohexylethyl methacrylate) cross-linked polymer, (stearyl methacrylate / lauryl methacrylate) cross-linked polymer, (methyl methacrylate / PEG / methacrylic acid PPG-4 / 3) cross-linked polymer, (lauryl methacrylate / ethylene glycol dimethacrylate) cross-linked polymer, (lauryl methacrylate / methacrylic acid Na) cross-linked polymer, acrylic acid Na cross-linked polymer, lauryl acrylate cross-linked polymer, acrylate cross-linked polymer,Acrylate cross-linked polymer-2-Na, acrylate cross-linked polymer-3, acrylate cross-linked polymer-4, acrylate polyacrylate cross-linked polymer-9-AMP, acrylate cross-linked polymer K, ethylene glycol dimethacrylate cross-linked polymer, polyacrylate-1 cross-linked polymer, polyacrylate-2 cross-linked polymer, polyacrylate cross-linked polymer-1-Na, polyacrylate cross-linked polymer-10, polyacrylate cross-linked polymer-11, polyacrylate cross-linked polymer-14, polyacrylate cross-linked polymer-3, polyacrylate cross-linked polymer-5, polyacrylate cross-linked polymer-6, allyl methacrylate cross-linked polymer, propyl trimethicone methacrylate cross-linked polymer, and the like.

[0118] The substance containing the above-described acrylate cross-linked polymer and taking a particle form can be preferably used as the other particle in the present application.

[0119] In addition, in the exemplification of the above-described acrylate cross-linked polymer, "VP" indicates "vinyl pyrrolidone", "HEMA" indicates "hydroxyethyl methacrylate", and "AMP" indicates "amino methyl propanol".

[0120] The other particle can contain only one kind of acrylate cross-linked polymer, or can contain two or more kinds.

[0121] Further, as the inorganic particle used as the other particle, there can be mentioned silica particles, porous silica particles, mica, kaolin, bentonite, calcium carbonate, talc, and the like.

[0122] As the silica particle, there can be mentioned silica, silylated silica, dimethyl silylated silica, polydimethyl siloxane silica, and the like.

[0123] As commercially available products of other particles, Matsumoto Microsphere S-100 (Matsumoto Yushi Seiyaku Co., Ltd., acrylate crosslinked polymer particles, 20 μm), Matsumoto Microsphere S-102 (Matsumoto Yushi Seiyaku Co., Ltd., acrylate crosslinked polymer particles, 20 μm), Matsumoto Microsphere M (Matsumoto Yushi Seiyaku Co., Ltd., acrylate crosslinked polymer particles, 15 μm), Matsumoto Microsphere M-305 (Matsumoto Yushi Seiyaku Co., Ltd., acrylate crosslinked polymer particles, 15 μm), Techpolymer ACX-1502C (Sekisui Chemical Co., Ltd., particle diameter 15 μm), Techpolymer ACX-2502 (Sekisui Chemical Co., Ltd.), and SILICA MICRO BEAD (Nippon Chemical Industry Co., Ltd., silica particles, particle diameter: 5 μm), and the like can be mentioned.

[0124] In the case where the cosmetic contains other particles, the content rate of the other particles is preferably 0.1 to 5% by mass, and more preferably 0.5 to 3% by mass, from the viewpoint of coexistence of skin affinity, inhibition of stickiness, and ultraviolet shielding effect.

[0125] The other particles can be contained singly by one kind, or two or more kinds. In the case where the cosmetic contains two or more kinds of other particles, the above content rate is the total content rate of the two or more kinds of other particles.

[0126] <Oil agent>

[0127] The cosmetic according to the present application preferably contains an oil agent. In the case where the cosmetic is constituted as an emulsion, the oil agent is a component which becomes a solvent or a dispersion medium in a composition which forms an oil phase. As the oil agent, it is not particularly limited as long as it is liquid at room temperature (25°C).

[0128] As the oil agent, silicone oil, ester oil, hydrocarbon oil, and the like can be mentioned, and it is preferable to contain silicone oil.

[0129] The cosmetic according to the present application can contain one kind of oil agent singly, or two or more kinds.

[0130] As the silicone oil, linear or branched polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, diphenylsiloxyphenyltrimethylsiloxane, octamethylcyclotetrasiloxane, cyclopentasiloxane (decamethylcyclopentasiloxane), dodecamethylcyclohexasiloxane, tetramethyltetrahydrocyclotetrasiloxane, and the like; cyclic polysiloxanes such as octamethylcyclotetrasiloxane, cyclopentasiloxane (decamethylcyclopentasiloxane), dodecamethylcyclohexasiloxane, tetramethyltetrahydrocyclotetrasiloxane, and the like; and octylpolymethylsiloxane, and the like can be given.

[0131] As the commercially available products of the silicone oil, KF-96L-0.65cs, KF-96L-1cs, KF-96L-1.5cs, KF-96L-2cs, KF-96L-5cs, KF-96A-5cs, KF-96A-6cs, KF-96-10cs, KF-96-20cs, KF-995, KF-56A (all of Shin-Etsu Chemical Co., Ltd.), SH200 C Fluid 1CS, SH200 Fluid 1.5CS, SH200C 2CS, SH200 C Fluid 5CS, SH200 C Fluid 6CS, SH200 C Fluid 10CS, SH200 C Fluid 20CS, 2-1184 Fluid, SH245 Fluid, DC246 Fluid, DC345 Fluid, SS-3408 (all of Dow Corning Toray Co., Ltd.), TSF404, TSF405, TSF4045 (all of Momentive Performance Materials Inc.), and the like can be given.

[0132] As the ester oil, pentaerythrityl tetraethylhexanoate, cetyl ethylhexanoate, jojoba oil, di(phytosteryl / octyldodecyl) lauroyl glutamate, triisostearin, glyceryl diisostearate, triethyl hexanoin, dipolydiadipoyl (phytosteryl / behenyl) ester, dipolydiadipoyl (phytosteryl / isostearyl / cetyl / stearyl / behenyl) ester, isopropyl palmitate, macadamia fatty acid phytosteryl ester, pentaerythrityl tetra(behenic acid / benzoic acid / ethylhexanoic acid) ester, ethylhexyl palmitate, myristyl myristate, tripropyleneglycol dineopentanoate, isotridecyl isononanoate, and the like can be given.

[0133] The hydrocarbon oil can be either of linear and branched. As the hydrocarbon oil, isodecane, isododecane, isohexadecane, and the like isomeric alkanes (isoparaffins) having a carbon number of 8 to 16, and the like can be given.

[0134] The content of the oil agent in the cosmetic is, for example, preferably 5 to 80 mass%, more preferably 10 to 80 mass%, further preferably 10 to 70 mass%, particularly preferably 15 to 70 mass%, and most preferably 20 to 60 mass%, relative to the total mass of the cosmetic.

[0135] In the case where the cosmetic according to the present application is a water-in-oil type cosmetic, it is preferable to contain 40 mass% or more of silicone oil relative to the total mass of the oil phase other than the avobenzone composite titanium oxide. If the content of the silicone oil in the oil phase other than the avobenzone composite titanium oxide in the cosmetic is 40 mass% or more, the water resistance and the use feeling (refreshing feeling) of the cosmetic have a tendency to improve.

[0136] In addition, the content of the oil agent is the content of the oil contained together with the silicone gel described later when a commercially available product of the silicone gel is used in the production of the cosmetic according to the present application.

[0137] From the viewpoint of the water resistance and the use feeling (specifically, the refreshing touch) of the cosmetic, the cosmetic according to the present application preferably contains polydimethylsiloxane (dimethylpolysiloxane), cyclopentasiloxane (decamethylcyclopentasiloxane), and diphenylsilylphenyltrimethylsiloxy. In this case, the content ratio (A:B:C) of polydimethylsiloxane (A), cyclopentasiloxane (B), and diphenylsilylphenyltrimethylsiloxy (C) is preferably 1 to 20:50 to 95:1 to 20, and more preferably 5 to 15:60 to 90:1 to 10, on a mass basis.

[0138] The total content of polydimethylsiloxane, cyclopentasiloxane, and diphenylsilylphenyltrimethylsiloxy in the cosmetic is, for example, preferably 5 to 80 mass%, more preferably 10 to 70 mass%, and further preferably 20 to 60 mass%, relative to the total mass of the cosmetic.

[0139] < Polyether-modified silicone >

[0140] The cosmetic according to the present application can contain a polyether-modified silicone. By containing a polyether-modified silicone in a skin external agent, the emulsion stability has a tendency to improve in the case where the cosmetic is configured as an emulsion. The cosmetic can contain one kind of polyether-modified silicone alone, or can contain two or more kinds.

[0141] The polyether-modified silicone is a polymer having a silicone chain as a main chain and a polyether chain introduced by modification. The silicone chain can be a linear silicone chain, or a branched silicone chain. As the polyether chain, a polyethylene glycol (PEG) chain, a polypropylene glycol (PPG) chain, or the like can be given. The polyether-modified silicone can further have an alkyl chain having 8 to 22 carbon atoms introduced by modification.

[0142] From the viewpoint of emulsion stability of the skin external preparation, the HLB (Hydrophile-Lipophile Balance) value of the polyether-modified silicone is preferably 1 to 10, more preferably 2 to 8. In the present specification, the HLB value of the polyether-modified silicone is a value calculated from the molecular weight and the number of ethylene oxide groups. In the case of using a commercially available product, the HLB value described in the catalog or the like can be directly used.

[0143] As the polyether-modified silicone, PEG-11 methylether dimethicone, PEG / PPG-20 / 22 butylether dimethicone, PEG / PPG-19 / 19 dimethicone, PEG-9 dimethicone, PEG-9 methylether dimethicone, PEG-10 dimethicone, PEG-21 methylether dimethicone, PEG-9 dimethyloxymethyl dimethicone, lauryl PEG-9 dimethyloxymethyl dimethicone, and the like can be given.

[0144] The polyether-modified silicone can also be obtained as a commercially available product. As the commercially available product, for example, KF-6011, KF-6011P, KF-6012, KF-6013, KF-6015, KF-6016, KF-6017, KF-6017P, KF-6043, KF-6028, KF-6028P, KF-6038 (all of which are products of Shin-Etsu Chemical Co., Ltd.), and the like can be given.

[0145] As the polyether-modified silicone, from the viewpoint of emulsion stability of the skin external preparation, a polyether-modified silicone having a branched silicone chain is preferred. Among them, as the polyether-modified silicone, at least one selected from the group consisting of PEG-9 dimethyloxymethyl dimethicone and lauryl PEG-9 dimethyloxymethyl dimethicone is more preferred.

[0146] In the case where the cosmetic contains the polyether-modified silicone, the content rate of the polyether-modified silicone is, for example, preferably 0.01 mass% to 10 mass%, more preferably 0.1 mass% to 9 mass%, and further preferably 1 mass% to 8 mass%, with respect to the total mass of the cosmetic. If the content rate of the polyether-modified silicone is 0.01 mass% or more, in the case where the cosmetic is configured as an emulsion, emulsion stability has a tendency to improve, and if the content rate of the polyether-modified silicone is 10 mass% or less, stickiness after the cosmetic is applied has a tendency to decrease.

[0147] < Silicone gel >

[0148] From the viewpoint of emulsion stability and the like, the cosmetic according to the present application can contain a silicone gel.

[0149] In the present application, silicone gel refers to a silicone crosslinked material in which silicone chains constituting a main chain skeleton are crosslinked to each other by polyether chains, polyglycerin chains, silicone chains, or the like.

[0150] Depending on the structure of the chains used in the crosslinking, there are polyether-modified silicone gel, polyglycerin-modified silicone gel, polyether-alkyl co-modified silicone gel, and polyglycerin-alkyl co-modified silicone gel, and the like. These can be used without any restriction in the cosmetic of the present application.

[0151] As the silicone gel, specifically, (polydimethylsiloxane / (PEG-10 / 15) crosspolymer, (PEG-15 / lauryl polydimethylsiloxane) crosspolymer, (PEG-10 / lauryl polydimethylsiloxane) crosspolymer, (PEG-15 / lauryl polydimethylsiloxane ethyl dimethicone) crosspolymer, (polydimethylsiloxane / polyglycerin-3) crosspolymer, (lauryl polydimethylsiloxane / polyglycerin-3) crosspolymer, (polyglycerin-3 / lauryl polydimethylsiloxane ethyl dimethicone) crosspolymer, (polydimethylsiloxane / vinyl dimethicone) crosspolymer, (polydimethylsiloxane / phenyl vinyl dimethicone) crosspolymer, (vinyl dimethicone / lauryl dimethicone) crosspolymer, (lauryl polydimethylsiloxane ethyl dimethicone / bis-vinyl dimethicone) crosspolymer, and the like can be mentioned.

[0152] As the commercially available product of the silicone gel, KSG-210, KSG-240, KSG-310, KSG-320, KSG-330, KSG-340, KSG-320Z, KSG-350Z, KSG-360Z, KSG-380Z, KSG-710, KSG-810, KSG-820, KSG-830, KSG-840, KSG-820Z, KSG-850Z, KSG-15, KSG-1510, KSG-16, KSG-1610, KSG-18A, KSG-19, KSG-016F, KSG-41A, KSG-42A, KSG-43A, KSG-44A, KSG-042Z, KSG-045Z, KSG-048Z (all of which are products of Shin-Etsu Chemical Co., Ltd.), and the like can be mentioned.

[0153] In the silicone gel, from the viewpoints of availability, swelling property to oil agents such as silicone oil, and emulsion stability, it is preferable that at least one selected from the group consisting of (polydimethylsiloxane / (PEG-10 / 15) crosspolymer and (polydimethylsiloxane / vinyl dimethicone) crosspolymer be used, and more preferably, (polydimethylsiloxane / (PEG-10 / 15) crosspolymer and (polydimethylsiloxane / vinyl dimethicone) crosspolymer be used together.

[0154] The content rate of the silicone gel in the cosmetic is, for example, preferably 0.1 to 8% by mass, more preferably 0.1 to 6% by mass, and further preferably 0.1 to 4% by mass, relative to the total mass of the cosmetic.

[0155] In the cosmetic, the silicone gel can be contained alone or two or more kinds can be contained. In the case where two or more kinds of silicone gels are contained in the cosmetic, the content rate described above is the total content rate of the two or more kinds of silicone gels.

[0156] <Surfactant>

[0157] The cosmetic according to the present application can contain a surfactant. By containing a surfactant in the cosmetic, the viscosity stability, emulsion stability, and the like of the cosmetic tend to be improved. The cosmetic can contain one kind of surfactant alone or two or more kinds can be contained.

[0158] As the surfactant, either one of a nonionic surfactant and an ionic surfactant can be used. As the ionic surfactant, an alkyl sulfonate, an alkyl sulfate, a monoalkyl phosphate, lecithin, and the like can be given. As the nonionic surfactant, sorbitan fatty acid ester, glycerin fatty acid ester, organic acid monoglyceride, polyglycerin fatty acid ester, propylene glycol fatty acid ester, polyglycerin condensed ricinoleic acid ester, sucrose fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, and the like can be given.

[0159] In the case where the cosmetic contains a surfactant, the content rate of the surfactant is, for example, preferably 0.01 to 30% by mass, more preferably 0.05 to 20% by mass, and further preferably 0.1 to 10% by mass, relative to the total mass of the cosmetic. If the content rate of the surfactant is 0.01% by mass or more, the viscosity stability of the cosmetic tends to be improved, and if the content rate of the surfactant is 30% by mass or less, the use feeling tends to be improved.

[0160] <Water>

[0161] The cosmetic according to the present application preferably contains water. In the case where the cosmetic is constituted as an emulsion, water is a component that becomes a solvent or a dispersion medium in the composition constituting an aqueous phase. As water, any water that can be used in a cosmetic is acceptable without particular limitation.

[0162] <Polyhydric Alcohol>

[0163] The cosmetic according to the present application can contain a polyhydric alcohol. By containing a polyhydric alcohol in a skin external preparation, the use feeling (moisturizing property) of the skin external preparation has a tendency to improve. The cosmetic can contain one kind of polyhydric alcohol alone, or two or more kinds of polyhydric alcohols.

[0164] As the polyhydric alcohol, there can be mentioned glycerin, polyglycerin, ethylene glycol, propylene glycol, dipropylene glycol, 1,3-butanediol, 1,2-pentanediol, 1,2-hexanediol, polyethylene glycol, glucose, galactose, sucrose, sorbitol, maltitol, erythritol, xylitol, trehalose, and the like.

[0165] From the viewpoint of improving the affinity with the skin, the cosmetic according to the present application preferably contains 1,3-butanediol.

[0166] <Other Component>

[0167] The cosmetic according to the present application can contain other components within a range not impairing the effects of the cosmetic according to the present application.

[0168] As the other component, there can be mentioned a fatty acid, a lipophilic thickening agent, a water-soluble organic solvent (ethanol and the like), a preservative (phenoxyethanol, methyl paraben, and the like), a pH adjustor, an emollient, a moisturizer, an antioxidant, a coloring agent, a perfume, other functional components, and the like.

[0169] <Use of Cosmetic>

[0170] The dosage form of the cosmetic to which the cosmetic according to the present application is applied can be either an oil-in-water type or a water-in-oil type, but from the aspect of being able to stably incorporate a UV shielding component, a water-in-oil type cosmetic is more preferable.

[0171] As the cosmetic, there can be mentioned a skin care cosmetic, a sunscreen cosmetic, a base makeup, and the like, and a sunscreen cosmetic can be preferably applied.

[0172] [Method for Manufacturing Cosmetic]

[0173] The method for manufacturing the cosmetic according to the present application is not particularly limited, and the cosmetic can be manufactured according to a publicly known method for manufacturing a cosmetic.

[0174] Next, an example of a production method when the cosmetic according to the present application is a water-in-oil type cosmetic will be shown.

[0175] For example, in the case of compounding avobenzone composite titanium oxide into the oil phase, an oil phase composition containing avobenzone composite titanium oxide and other oil phase components (e.g., zinc oxide, other particles, oil agents, other arbitrary components) can be prepared, and the obtained oil phase composition and the water phase composition can be mixed to produce a water-in-oil type cosmetic.

[0176] Also, in the case of compounding avobenzone composite titanium oxide into the water phase, a water phase composition containing avobenzone composite titanium oxide and other water phase components can be prepared, and the obtained water phase composition and the oil phase composition can be mixed to produce an oil-in-water type cosmetic.

[0177] The emulsification method when the oil phase composition and the water phase composition are mixed to obtain a water-in-oil type cosmetic as a water-in-oil type emulsion is not particularly limited, and can be performed according to a conventional method.

[0178] Example

[0179] Next, the cosmetic and the oily composition according to the present application will be further specifically described by way of examples, but the cosmetic according to the present application is not limited to the following examples.

[0180] Also, the cosmetic of each example can be preferably used as a sunscreen cosmetic.

[0181] [Production Example 1]

[0182] At room temperature (25°C, hereinafter the same.), cyclopentasiloxane (trade name: KF-995, Shin-Etsu Chemical Co., Ltd.), avobenzone composite titanium oxide (trade name: HXMT-100ZA, composite powder, TAYCA Co., Ltd.), and PEG-9 polydimethylsiloxaneethyl dimethicone (trade name: KF-6028, Shin-Etsu Chemical Co., Ltd.) were sufficiently mixed by stirring with a disperser.

[0183] After that, ethylhexyl methoxy cinnamate (trade name: Uvinul MC80 N, BASF Japan Ltd.) was further added, and stirring and mixing were performed to make it uniform, thereby obtaining the oily composition of Production Example 1.

[0184] The composition (mass parts) of the oily composition prepared in Production Example 1 is shown in Table 1.

[0185] [Production Examples 2 to 4, Comparative Production Examples 1 to 3]

[0186] In the preparation of the oil composition of Production Example 1, the addition amount of ethylhexyl methoxy cinnamate was changed to the amount shown in Table 1, and otherwise, in the same manner as Production Example 1, the oil compositions of Production Examples 2 to 4 and Comparative Production Examples 1 to 3 were obtained.

[0187] [Evaluation of the oil composition]

[0188] Each of the obtained oil compositions was filled in a glass vial of 30 mL and sealed, and left to stand for 2 days in an environment of 25°C. For each of the oil compositions after standing, visual observation was made for the presence or absence of precipitation, and evaluation was made in accordance with the following evaluation criteria. The results are shown in Table 1.

[0189] = Evaluation Criteria =

[0190] A: No precipitation was observed.

[0191] B: Precipitation was observed.

[0192] [Table 1]

[0193]

[0194] As shown in Table 1, it was found that each of the oil compositions of the production examples did not produce precipitation caused by the addition of ethylhexyl methoxy cinnamate, and had good stability over time.

[0195] On the other hand, Comparative Production Example 1 in which the ratio of ethylhexyl methoxy cinnamate to avobenzone composite titanium oxide (composite powder) was 0.9 or more produced precipitation when left to stand for 2 days at 25°C, and it was found that the stability over time was poor. It is considered that this is the effect of the avobenzone adsorbed on the surface of the composite powder dissolving in ethylhexyl methoxy cinnamate, thereby decreasing the dispersion stability of the composite powder.

[0196] [Example 1]

[0197] A water-in-oil type cosmetic was prepared in such a manner that the total amount of each component was 100 mass% in accordance with the formulation described in Table 1.

[0198] (Preparation of the oil phase composition)

[0199] At room temperature (25°C, the same hereinafter), cyclopentasiloxane (trade name: KF-995, Shin-Etsu Chemical Co., Ltd.), avobenzone composite titanium oxide (trade name: HXMT-100ZA, composite powder, TAYCA Co., Ltd.), and PEG-9 polydimethylsiloxaneethyl dimethicone (trade name: KF-6028, Shin-Etsu Chemical Co., Ltd.) were mixed by stirring with a disperser.

[0200] After that, (polydimethylsiloxane / vinyl polydimethylsiloxane) crosslinking polymer (trade name: KSG-16, Shin-Etsu Chemical Co., Ltd.) and (polydimethylsiloxane / (PEG-10 / 15) crosslinking polymer (trade name: KSG-210, Shin-Etsu Chemical Co., Ltd.), ethylhexyl methoxy cinnamate (Uvinul MC80N, BASF Japan Ltd.), (butyl acrylate / ethylene glycol dimethacrylate) crosslinking polymer, and (butyl methacrylate / ethylene glycol dimethacrylate) crosslinking polymer (trade name: Matsumoto Microsphere S-100, particle diameter: 15 μm, Matsumoto Yushi-Seiyaku Co., Ltd.), sorbitan sesquioleate (trade name: NIKKOL SO-15V, Nikko Chemicals Co., Ltd.), polydimethylsiloxane (trade name: KF-96A-5cs, Shin-Etsu Chemical Co., Ltd.), diphenylsiloxyphenyl polytrimethylsiloxane (trade name: KF-56A, Shin-Etsu Chemical Co., Ltd.), and trimethylsiloxy silylaminocarbamoyl amylopectin (trade name: TSP-30-D5, Shin-Etsu Chemical Co., Ltd.) were further added, and stirred and mixed to be uniform, whereby an oil phase composition was obtained.

[0201] (Preparation of the water phase composition)

[0202] To purified water, phenoxyethanol, BG (1,3-butanediol), and ethanol, Mg sulfate, Na citrate, glycyrrhizic acid 2K, Persea americana leaf extract, Lagerstroemia speciosa leaf extract, Centaurea cyanus flower extract, and a perfume were added, and stirred and mixed to be uniform at room temperature, whereby a water phase composition was obtained.

[0203] (Preparation of the water-in-oil cosmetic)

[0204] Next, the oil phase composition and the water phase composition were mixed by a conventional method, and stirred for 15 minutes at 3000 rpm using a homogenizer (trade name: HM-310, AS ONE Corporation), whereby the water-in-oil cosmetic of Example 1 was obtained.

[0205] [Evaluation]

[0206] 1. Ultraviolet shielding effect

[0207] The SPF and UVA-PF values of each of the water-in-oil cosmetic were calculated using a Simulator provided by BASF (www.basf.com / sunscreensimulator; Herzog, B.; Osterwalder, U. In Silico Determination of Topical Sun Protection. Cosm Sci Tech. 2011; 62: 1-8).

[0208] Based on the calculated SPF and UVA-PF values, the ultraviolet shielding effect was evaluated according to the following evaluation criteria.

[0209] If the evaluation grade is "AAA", "AA", "A", and "B", it is acceptable in practical use, and "AAA", "AA", and "A" are preferred, "AAA" and "AA" are more preferred, and "AAA" is particularly preferred.

[0210] = Evaluation Criteria =

[0211] AAA: SPF is 50 or more, and UVA-PF is 16 or more.

[0212] AA: SPF is 30 or more and less than 50, and UVA-PF is 8 or more and less than 16.

[0213] A: SPF is 10 or more and less than 30, and UVA-PF is 4 or more and less than 8.

[0214] B: SPF is 5 or more and less than 10, and UVA-PF is 2 or more and less than 4.

[0215] C: SPF is less than 5, and UVA-PF is less than 2.

[0216] 2. Stability over time

[0217] Each of the water-in-oil cosmetics was filled in a glass vial at 50 mL and sealed, and left to stand for a period of time at 25°C for 60 days. With respect to the water-in-oil cosmetic after the passage of time, the presence or absence of stratification was observed visually, and the stability over time was evaluated according to the following evaluation criteria. The results are shown in Table 2.

[0218] = Evaluation Criteria =

[0219] A: No stratification was observed after the passage of time.

[0220] B: Stratification was observed after the passage of time.

[0221] [Examples 2 to 4, Comparative Examples 1 and 2]

[0222] In Example 1, the compounding amounts of the respective components used in the preparation of the water-in-oil cosmetic were changed to the components and compounding amounts described in Table 2 below, and otherwise, in the same manner as in Example 1, the water-in-oil cosmetics of Examples 2 to 4 and Comparative Examples 1 to 2 were obtained.

[0223] Using the respective water-in-oil cosmetics obtained, evaluation was performed in the same manner as in Example 1 for "1. UV shielding effect" and "2. Chronological stability". Furthermore, using the respective water-in-oil cosmetics obtained, evaluation was performed for "3. Spreading property" as described below.

[0224] The results are shown in Table 2.

[0225]

[0226] As shown in Table 2, it was found that the water-in-oil cosmetics of Examples 1 to 4 were excellent in both UV shielding effect and chronological stability.

[0227] On the other hand, in the water-in-oil cosmetic of Comparative Example 1, the content of avobenzone composite titanium oxide was less than 3.0 mass% relative to the total mass of the cosmetic, and sufficient UV shielding effect was not obtained. In the water-in-oil cosmetic of Comparative Example 2, the ratio of the content of ethylhexyl methoxy cinnamate relative to avobenzone composite titanium oxide was 0.9 or more, and this resulted in poor chronological stability.

[0228] [Examples 5 to 7]

[0229] In Example 1, the compounding amounts of avobenzone composite titanium oxide and cyclopentasiloxane were changed to the amounts shown in Table 3, and otherwise, in the same manner as in Example 1, the water-in-oil cosmetics of Examples 5 to 7 were obtained.

[0230] [Evaluation]

[0231] Using the respective water-in-oil cosmetics obtained, evaluation was performed in the same manner as in Example 1 for "1. UV shielding effect" and "2. Chronological stability". Furthermore, using the respective water-in-oil cosmetics obtained, evaluation was performed for "3. Spreading property" as described below.

[0232] 3. Spreading property

[0233] A panel of 4 experts evaluated whether or not the respective water-in-oil cosmetics followed the movement of the fingers and were easily spread when 100 μL of each water-in-oil cosmetic was applied to the inner side of the forearm with the fingers, in accordance with the evaluation criteria described below.

[0234] The evaluation grades were preferably "A", "B" and "C", more preferably "A" and "B", and further preferably "A".

[0235] The evaluation grade with the largest number of people was taken as the evaluation result for the spreading property.

[0236] = Evaluation Criteria -

[0237] A: Very good ductility.

[0238] B: Good ductility.

[0239] C: Moderately ductile to an extent acceptable as a cosmetic.

[0240] The above results are shown in Table 3.

[0241]

[0242] As shown in Table 3, it was found that the water-in-oil cosmetic of the Examples was excellent in both the ultraviolet shielding effect and the stability over time, and was more excellent in "ductility" when the content of avobenzone composite titanium oxide was in the range of 3.0 to 21.0 mass% relative to the total mass of the cosmetic.

[0243] [Examples 8 to 11]

[0244] In Example 3, diethylamino hydroxybenzoyl hexyl benzoate (solid oil-soluble ultraviolet absorber, trade name Uvinul A Plus Granular, BASF Japan Ltd.), methylene bis-benzotriazolyl tetramethylbutylphenol (water-dispersible ultraviolet absorber particle, trade name Tinosorb M, BASF Japan Ltd.), and triethoxysilyl octyl silane-treated zinc oxide (zinc oxide, trade name MZX-508 OTS, TAYCA Co., Ltd.) were further added to the ingredients for preparing the water-in-oil cosmetic, and were set to the compounding amounts described in Table 4 below, and otherwise, the water-in-oil cosmetics of Examples 8 to 11 were obtained in the same manner as in Example 3.

[0245] In addition, the empty column in the composition column shown in Table 4 indicates that the corresponding ingredient was not compounded.

[0246] [Evaluation]

[0247] Using each of the obtained water-in-oil cosmetics, "1. Ultraviolet shielding effect" and "2. Stability over time" were evaluated in the same manner as in Example 3.

[0248] The results are shown in Table 4.

[0249]

[0250] As shown in Table 4, it was found that the water-in-oil cosmetic of Examples 8 to 11, in which the solid oily ultraviolet absorbing agent (diethylamino hydroxybenzoyl hexyl benzoate), the water-dispersible particulate ultraviolet absorbing agent (methylene bis-benzotriazolyl tetramethylbutylphenol) and / or the zinc oxide were added to the water-in-oil cosmetic of Example 3, had an improved ultraviolet shielding effect compared to Example 3, and had the same stability over time as Example 3.

Claims

1. A cosmetic comprising a composite powder of titanium oxide and 4-tert-butyl-4'-methoxydibenzoylmethane and ethylhexyl methoxycinnamate, the content ratio of the composite powder is 3.0 to 30.0 mass% with respect to the total mass of the cosmetic, the content ratio of the ethylhexyl methoxycinnamate with respect to the composite powder is 0.10 to 0.80 on a mass basis.

2. The cosmetic according to claim 1, wherein, the content ratio of the composite powder is 3.0 to 21.0 mass% with respect to the total mass of the cosmetic.

3. The cosmetic according to claim 1 or 2, further comprising a solid oil-soluble ultraviolet absorber.

4. The cosmetic according to claim 1 or 2, further comprising water-dispersible ultraviolet absorber particles.

5. The cosmetic according to claim 1 or 2, further comprising zinc oxide.

6. The cosmetic according to claim 1 or 2, which is a water-in-oil type cosmetic.

7. The cosmetic according to claim 1 or 2, which is a sunscreen cosmetic.

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