Cosmetic composition

Abstract

Provided is a cosmetic composition having further improved ultraviolet ray absorption capability in the UVA and UVB regions.　This cosmetic composition contains the following components (i) and (ii) and an oil component that is capable of dissolving at least a portion of these components.　(i) A first compound that has the structure of formula (I). (In the formula, -OA represents an alkoxy group.) (ii) A second compound that has the structure of formula (II-1), (II-2), (II-3), or (II-4), has a molecular weight of 250 or greater, and is a compound other than the first compound　(In the formula, the benzene ring optionally has a substituent.)

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, has an ultraviolet suppression effect over a wide range of wavelengths, and 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.

[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 Patent Document 1, the compound represented by the above general formula I is incorporated directly into an ointment or a liquid medium to exert its ultraviolet absorbing ability in the UVA and UVB regions.

[0008] However, the ultraviolet absorber of Patent Document 1 still has room for improvement in terms of its ultraviolet absorbing ability in the UVA and UVB regions.

[0009] The present invention is intended to improve the above situation, and its object is to provide a cosmetic composition having improved ultraviolet absorbing ability in the UVA and UVB regions.

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

[0011] Aspect 1: A cosmetic composition comprising the following components (i) and (ii) and an oil capable of at least partially dissolving these components: (i) a first compound having a structure represented by the following formula (I): (wherein -OA represents an alkoxy group) (ii) A second compound other than the first compound, which has a structure represented by any one of the following formulae (II-1), (II-2), (II-3), and (II-4) and has a molecular weight of 250 or more: (wherein the benzene ring may have a substituent.) <Aspect 2> The composition according to Aspect 1, wherein the second compound is at least one compound selected from the group consisting of ethylhexyl methoxycinnamate, octocrylene, ethylhexyl salicylate, homosalate, bisethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoylhexyl benzoate, ethylhexyl triazone, polysilicone-15, t-butylmethoxydibenzoylmethane, phenylbenzimidazole sulfonic acid, and terephthalylidene dicamphor sulfonic acid. <Aspect 3> The composition according to Aspect 1 or 2, wherein the oil component comprises a polar oil. <Aspect 4> The composition according to Aspect 3, wherein the first compound is present in an amount of 0.01 to 50 parts by mass per 100 parts by mass of the polar oil and the first compound combined. <Aspect 5> The composition according to any one of Aspects 1 to 4, which is an oil-in-water cosmetic. Aspect 6: The composition according to any one of Aspects 1 to 4, which is a water-in-oil cosmetic. Aspect 7: The composition according to any one of Aspects 1 to 4, which is an oil-based cosmetic. Aspect 8: The composition according to any one of Aspects 1 to 7, which is a sunscreen cosmetic composition.

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

[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") is a cosmetic composition containing the following components (i) and (ii), and an oil component capable of at least partially dissolving these components: (i) a first compound having a structure represented by the following formula (I): (wherein -OA represents an alkoxy group) (ii) A second compound other than the first compound, which has a structure represented by any one of the following formulae (II-1), (II-2), (II-3), and (II-4) and has a molecular weight of 250 or more:

[0015] Through intensive research by the present inventors, a cosmetic composition was discovered that further improves the conventional ultraviolet absorbing ability in the UVA and UVB regions by using a first compound in combination with a second compound having a specific structure and a specific molecular weight.

[0016] More specifically, in the composition of the present invention, by combining a first compound having ultraviolet absorbing ability in the UVA and UVB regions with a second compound having a structural moiety similar to that of the first compound and having a predetermined molecular weight (a molecular weight of 250 or more), a remarkable effect was obtained in improving the ultraviolet absorbing effect. Without being limited by theory, it is believed that this is because the use of a specific second compound suppresses the self-stacking of the first compound, thereby further improving the ultraviolet absorbing effect.

[0017] <Component (i): First Compound> In the present invention, the first compound has a structure of the following formula (I): (wherein —OA represents an alkoxy group)

[0018] 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.

[0019] In the present invention, the first compound may have the same structure as the compound represented by general formula I disclosed in Patent Document 1.

[0020] Furthermore, in the composition of the present invention, from the viewpoint of further exerting the effects of the present invention, it is preferred that the first compound is at least partially dissolved, particularly 50% by mass or more dissolved, more particularly 90% by mass or more dissolved, even more particularly 99% by mass or more dissolved, and most particularly 100% by mass dissolved.

[0021] In the composition of the present invention, the content of the first compound is not particularly limited, and may be, for example, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more, 8.0% by mass or more, 8.5% by mass or more, 9.0% by mass or more, 9.5% by mass or more, or 10% by mass or more, and may be 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 10% by mass or less, 8.0% by mass or less, 5.0% by mass or less, or 2.0% by mass or less, for example, relative to the entire cosmetic composition.

[0022] <Component (ii): Second Compound> In the present invention, the second compound is other than the first compound described above, and has a structure represented by any one of the following formulae (II-1), (II-2), (II-3), and (II-4), and has a molecular weight of 250 or more: (wherein the benzene ring may have a substituent).

[0023] In the present invention, the second compound may have any one of the structures of the above formulae (II-1), (II-2), (II-3), and (II-4) in its structural formula, and may further have one or more substituents on the benzene ring of the structure of formulae (II-1), (II-2), (II-3), and (II-4).

[0024] In the present invention, examples of the substituent include an alkyl group or an alkyl group which may be further substituted with other substituents, a cycloalkyl group or a cycloalkyl group which may be further substituted with other substituents, an alkenyl group or an alkenyl group which may be further substituted with other substituents, an alkynyl group or an alkynyl group which may be further substituted with other substituents, an aryl group or an aryl group which may be further substituted with other substituents, a carbonyl group, a hydroxyl group, an alkoxyl group, an amino group or an amino group which may be further substituted with other substituents, a heterocyclic group or a heterocyclic sulfonic acid group which may be further substituted with other substituents, or a halogen atom, but are not limited to these.

[0025] More specifically, the molecular weight of the second compound may be, for example, 250 or more, 260 or more, 270 or more, 280 or more, 290 or more, 300 or more, 310 or more, 320 or more, 330 or more, 340 or more, 350 or more, 360 or more, 370 or more, 380 or more, 390 or more, 400 or more, 450 or more, 500 or more, 550 or more, 600 or more, 650 or more, 700 or more, 750 or more, or 800 or more. The upper limit is not particularly limited, but may be, for example, 10,000 or less, 8,000 or less, 7,000 or less, 6,000 or less, 5,000 or less, 4,000 or less, 3,000 or less, 2,000 or less, or 1,000 or less.

[0026] In the present invention, examples of the second compound include ethylhexyl methoxycinnamate (molecular weight: 290), octocrylene (molecular weight: 361), ethylhexyl salicylate (molecular weight: 250), homosalate (molecular weight: 262), bisethylhexyloxyphenol methoxyphenyl triazine (molecular weight: 628), diethylaminohydroxybenzoyl hexyl benzoate (molecular weight: 398), ethylhexyl triazone (molecular weight: 823), polysilicone-15 (molecular weight: about 6000), t-butyl methoxydibenzoylmethane (molecular weight: 262), and the like.

[0049] The compound may be, but is not limited to, at least one compound selected from the group consisting of methyl benzotriazolyl tetramethylbutylphenol (molecular weight: 659), ... Among these, at least one compound selected from the group consisting of ethylhexyl salicylate (molecular weight: 250), bisethylhexyloxyphenol methoxyphenyl triazine (molecular weight: 628), ethylhexyl triazone (molecular weight: 823), polysilicone-15 (molecular weight: approximately 6000), t-butyl methoxydibenzoylmethane (molecular weight: 310), phenylbenzimidazole sulfonic acid (molecular weight: 274), and terephthalylidene dicamphor sulfonic acid (molecular weight: 563) is particularly preferred, and at least one compound selected from the group consisting of polysilicone-15 (molecular weight: approximately 6000), phenylbenzimidazole sulfonic acid (molecular weight: 274), and terephthalylidene dicamphor sulfonic acid (molecular weight: 563) is more preferred.

[0027] Furthermore, in the composition of the present invention, from the viewpoint of further exerting the effects of the present invention, when the second compound is solid, it is preferably at least partially dissolved, particularly 50% by mass or more dissolved, more particularly 90% by mass or more dissolved, even more particularly 99% by mass or more dissolved, and most particularly 100% by mass dissolved.

[0028] In the composition of the present invention, the content of the second compound is not particularly limited, and may be, for example, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more, 8.0% by mass or more, 8.5% by mass or more, 9.0% by mass or more, 9.5% by mass or more, or 10% by mass or more, and may be 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 10% by mass or less, 8.0% by mass or less, 5.0% by mass or less, or 2.0% by mass or less, for example, relative to the entire cosmetic composition.

[0029] <Oil> The composition of the present invention contains an oil. The oil contained in the composition of the present invention is an oil that can at least partially dissolve the first compound and the second compound described above, and therefore can at least partially dissolve these components (i.e., the first compound and the second compound).

[0030] 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 99.9% by mass or less, 90% by mass or less, 80% by mass or less, 70% by mass or less, 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.

[0031] In the present invention, the oil component is not particularly limited as long as it can at least partially dissolve the first compound and the second compound. More specifically, the oil component may contain, for example, one or more of polar oil, silicone oil, hydrocarbon oil, etc. From the viewpoint of dissolving the first compound, it is preferable that the oil component contains a polar oil.

[0032] (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).

[0033] In the present invention, the first compound and the second compound having an IOB value of 0.10 or more are excluded from the term "polar oil" herein.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In addition, when the oil component of the composition of the present invention contains a polar oil, the polar oil and the first compound may be blended in the following composition ratio. More specifically, the first compound is 0.01 parts by mass or more, 0.05 parts by mass or more, 0.1 parts by mass or more, 0.5 parts by mass or more, 1.0 parts by mass or more, 1.5 parts by mass or more, 2.0 parts by mass or more, 2.5 parts by mass or more, 3.0 parts by mass or more, 3.5 parts by mass or more, 4.0 parts by mass or more, 4.5 parts by mass or more, 5.0 parts by mass or more, 5.5 parts by mass or more, 6.0 parts by mass or more relative to 100 parts by mass of the total of the polar oil and the first compound. , 6.5 parts by mass or more, 7.0 parts by mass or more, 7.5 parts by mass or more, 8.0 parts by mass or more, 8.5 parts by mass or more, 9.0 parts by mass or more, 9.5 parts by mass or more, 10 parts by mass or more, 15 parts by mass or more, or 20 parts by mass or more, and may be 50 parts by mass or less, 45 parts by mass or less, 40 parts by mass or less, 35 parts by mass or less, 30 parts by mass or less, 25 parts by mass or less, 20 parts by mass or less, 15 parts by mass or less, or 10 parts by mass or less.

[0038] (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. Note that in the present invention, the second compound that has a main skeleton formed by siloxane bonds is excluded from the term "silicone oil" herein.

[0039] In the present invention, the silicone oil may be a volatile silicone oil or a non-volatile silicone oil.

[0040] 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.

[0041] In the present invention, the silicone oil may be a non-cyclic silicone oil (i.e., a chain silicone oil) or a cyclic silicone oil.

[0042] 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. Furthermore, from the viewpoint of texture when used, acyclic silicone oils are particularly preferred.

[0043] 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.

[0044] (Hydrocarbon Oil) In the present invention, the hydrocarbon oil refers to a hydrocarbon oil other than the above-mentioned polar oils.

[0045] The hydrocarbon oil may be a volatile hydrocarbon oil or a non-volatile hydrocarbon oil.

[0046] 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.

[0047] <Uses and Forms 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.

[0048] The form of the composition of the present invention is not particularly limited, and may be, for example, an oil-in-water emulsion cosmetic composition, a water-in-oil emulsion cosmetic composition, or an oil-based cosmetic composition.

[0049] Other Components The cosmetic composition of the present invention may further contain any aqueous component or other component that can be used in the cosmetic field, in addition to the components described above. Examples of other components include, but are not limited to, ultraviolet scattering agent particles, surfactants, 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.

[0050] (Ultraviolet Scattering Agent Particles) The composition of the present invention may further contain ultraviolet scattering agent particles from the viewpoint of enhancing the ultraviolet protection effect.

[0051] The ultraviolet scattering particles are not particularly limited, and may be, for example, particles of at least one metal oxide selected from the group consisting of titanium oxide, zinc oxide, iron oxide, and cerium oxide.

[0052] 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, 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] (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.

[0057] 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.

[0058] In the composition of the present invention, when a surfactant is contained, the content thereof is not particularly limited and is, for example, from 1.0% by mass to 10% by mass.

[0059] (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.

[0060] Furthermore, when a water-soluble component is contained, its content is not particularly limited and may be, for example, 1.0 to 10% by mass.

[0061] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0062] Preparation of Water-in-Oil Cosmetic Compositions Example 1, Comparative Examples 1-1 and 1-2 Based on the compositions (mass %) in Table 1 below, the compositions of Example 1 and Comparative Examples 1-1 and 1-2 were prepared.

[0063] In Example 1 and Examples 2 to 11 described below, Compound I represented by the following structural formula was used as the first compound:

[0064] (Evaluation) The ultraviolet absorption wavelength of each prepared composition was measured, and the integrated value of absorbance in the range of 290 to 400 nm was calculated. The improvement in ultraviolet absorption ability of each of the compositions of Example 1 and Comparative Example 1-2 relative to Comparative Example 1-1 (standard) was calculated as a "boost rate." That is, the "boost rate" was calculated using the following formula: Boost rate = (integrated value of absorbance of Example 1 or Comparative Example 1-2 / integrated value of absorbance of Comparative Example 1-1) × 100%

[0065] The boost rate results obtained are shown in Table 1.

[0066]

[0067] As is clear from Table 1, the composition of Example 1 containing the first and second compounds had significantly improved ultraviolet absorption ability in the UVA and UVB regions compared to Comparative Example 1-1 not containing the first compound.

[0068] Furthermore, it was found that the composition of Comparative Example 1-2, which did not contain the first compound but contained two types of the second compound, had a slightly improved ultraviolet absorption ability compared to Comparative Example 1-1, but the improvement in the ultraviolet absorption ability was not as great as that of the composition of Example 1.

[0069] Examples 2 to 11 and Comparative Examples 2 to 13 Compositions of Examples 2 to 11 and Comparative Examples 2 to 13 were prepared based on the compositions (mass%) in Tables 2 and 3 below. The compositions of Comparative Examples 3 to 12 each have the same composition as the compositions of Examples 2 to 11, except that they do not contain the "first compound" and instead the amount of water is increased accordingly. The composition of Comparative Example 13 has the same composition as the composition of Comparative Example 2, except that they do not contain the "first compound" and instead the amount of water is increased accordingly.

[0070] (Evaluation) In the same manner as in Example 1, the integrated value of absorbance at 290 to 400 nm of each of the prepared compositions was determined, and the improving effect of the ultraviolet absorbing ability of each of the compositions of Examples 2 to 11 and Comparative Example 2 was determined as a "boost rate." The respective results are shown in Table 2.

[0071] When calculating the boost rate, Comparative Examples 3 to 13 were used as the standard for Examples 2 to 11 and Comparative Example 2, respectively.

[0072]

[0073]

[0074] The details of the "other" ingredients in Tables 2 and 3 are as follows: Ethanol 5.0% by mass Glycerin 1.0% by mass Disteardimonium hectorite 0.5% by mass PEG-9 polydimethylsiloxyethyl dimethicone 2.0% by mass Isostearic acid 0.5% by mass Diisopropyl sebacate 10% by mass Triethylhexanoin 10% by mass Isododecane 10% by mass Dimethicone 10% by mass Aluminum stearate-treated titanium oxide 2.0% by mass Triethoxycaprylylsilane-treated zinc oxide 5.0% by mass Silica powder 5.0% by mass Phenoxyethanol 5.0% by mass Sodium chloride 0.1% by mass EDTA-3Na 0.2% by mass

[0075] As is clear from Table 2, the compositions of Examples 2 to 11, which contained both the first and second compounds, had a higher boost rate (i.e., the ultraviolet absorption ability in the UVA and UVB regions was significantly improved) compared to Comparative Examples 3 to 12, which contained only the second compound among the first to third compounds. This demonstrates that a synergistic effect is produced by combining the first compound and the second compound.

[0076] Furthermore, the boost rate of Comparative Example 2, which contained both the first and third compounds, was smaller than that of Comparative Example 13, which contained only the third compound among the first to third compounds (i.e., there was no significant improvement in ultraviolet absorption ability in the UVA and UVB regions). This indicates that the combination of the first compound and the third compound does not produce a synergistic effect.

[0077] Reference Examples 1 and 2: Compositions of Reference Example 1 containing the first compound but not the second compound, and Reference Example 2 containing the second compound but not the first compound, were prepared based on the formulations shown in Table 4. Note that the "first compound" in Reference Example 1 was the same compound I as in Example 1 described above.

[0078] (Evaluation) The integrated value of absorbance at 290 to 400 nm of each of the prepared compositions was determined, and the "boost rate" of one composition was calculated using the other composition as the standard. The results are shown in Table 4.

[0079]

[0080] As shown in Table 4, the ultraviolet absorbing abilities of the compositions of Reference Examples 1 and 2 were found to be comparable, indicating that the ultraviolet absorbing abilities of the first and second compounds in these compositions are comparable.

[0081] Preparation of Oil-Based Cosmetic Compositions Examples 12 to 20 and Comparative Examples 14 to 24 Compositions of Examples 12 to 20 and Comparative Examples 14 to 24 were prepared based on the compositions (mass%) in Tables 5 and 6 below. The compositions of Comparative Examples 15 to 23 each have the same composition as the compositions of Examples 12 to 20, except that they do not contain the "first compound" and instead the oil content has been increased accordingly. The composition of Comparative Example 24 also has the same composition as the composition of Comparative Example 14, except that they do not contain the "first compound" and instead the oil content has been increased accordingly.

[0082] (Evaluation) In the same manner as in Example 1, the integrated value of absorbance at 290 to 400 nm of each of the prepared compositions was determined, and the improving effect of the ultraviolet absorbing ability of each of the compositions of Examples 12 to 20 and Comparative Example 14 was determined as a "boost rate." The respective results are shown in Table 5.

[0083] When calculating the boost rate, Comparative Examples 15 to 24 were used as the standard for Examples 12 to 20 and Comparative Example 14, respectively.

[0084]

[0085] The details of the "other" ingredients in Tables 5 and 6 are as follows: Ethanol 5.0% by mass Glycerin 1.0% by mass Hydroxystearic acid 6.0% by mass Polyamide-8, pentaerythrityl tetra(di-t-butylhydroxyhydrocinnamate) 2.0% by mass Dibutyl lauroyl glutamide 2.0% by mass Silica powder 5.0% by mass

[0086] As is clear from Table 5, the compositions of Examples 12 to 20 containing both the first and second compounds had a higher boost rate (i.e., the ultraviolet absorption ability in the UVA and UVB regions was significantly improved) compared to Comparative Examples 15 to 23 containing only the second compound among the first to third compounds. This demonstrates that a synergistic effect is produced by combining the first compound and the second compound.

[0087] Furthermore, the boost rate of Comparative Example 14, which contained both the first and third compounds, was smaller than that of Comparative Example 24, which contained only the third compound among the first to third compounds (i.e., there was no significant improvement in ultraviolet absorption ability in the UVA and UVB regions). This indicates that the combination of the first compound and the third compound does not produce a synergistic effect.

[0088] Preparation of Oil-in-Water Cosmetic Compositions Examples 21 to 31 and Comparative Examples 25 to 37 The compositions of Examples 21 to 31 and Comparative Examples 25 to 37 were prepared based on the compositions in Tables 7 and 8 below. The compositions of Comparative Examples 26 to 36 each have the same composition as the "first compound" of Examples 21 to 31, except that they do not contain the "first compound" and instead the amount of water is increased accordingly. The composition of Comparative Example 37 does not contain the "first compound" and instead the amount of water is increased accordingly, except that they have the same composition as the composition of Comparative Example 25.

[0089] (Evaluation) In the same manner as in Example 1, the integrated value of absorbance at 290 to 400 nm of each of the prepared compositions was determined, and the improving effect of the ultraviolet absorbing ability of each of the compositions of Examples 21 to 31 and Comparative Example 25 was determined as a "boost rate." The respective results are shown in Table 7.

[0090] When calculating the boost rate, Comparative Examples 26 to 37 were used as the standard for Examples 21 to 31 and Comparative Example 25, respectively.

[0091]

[0092] The details of the "other" ingredients in Tables 7 and 8 are as follows: Glycerin 4.0% by mass 1,3-butylene glycol 7.0% by mass Succinoglycan 0.12% by mass Sucrose fatty acid ester 3.0% by mass (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer 0.6% by mass PEG-60 hydrogenated castor oil 1.6% by mass Diisopropyl sebacate 4.0% by mass Non-volatile dimethicone 2.0% by mass PPG-17 1.0% by mass Cyclomethicone 12% by mass Triethylhexanoin 5.0% by mass Isostearic acid 1.0% by mass Sorbitan sesquiisostearate 0.5% by mass Dimethicone-treated silica-coated zinc oxide fine particles 10% by mass Silica powder 1.0% by mass

[0093] The details of "buffer" in Tables 7 and 8 are as follows: Citric acid: appropriate amount Sodium citrate: appropriate amount EDTA-3Na: appropriate amount

[0094] As is clear from Table 7, the compositions of Examples 21 to 31 containing both the first and second compounds had a higher boost rate (i.e., the ultraviolet absorption ability in the UVA and UVB regions was significantly improved) compared to Comparative Examples 26 to 36 containing only the second compound among the first to third compounds. This demonstrates that a synergistic effect is produced by combining the first compound and the second compound.

[0095] Furthermore, the boost rate of Comparative Example 25, which contained both the first and third compounds, was smaller than that of Comparative Example 37, which contained only the third compound among the first to third compounds (i.e., there was no significant improvement in ultraviolet absorption ability in the UVA and UVB regions). This indicates that the combination of the first compound and the third compound does not produce a synergistic effect.

Claims

1. A cosmetic composition containing the following components (i) and (ii), and an oil component in which these components can be at least partially dissolved: (i) A first compound having the structure of the following formula (I): 【Chemical 1】 (In the formula, -OA represents an alkoxy group) (ii) A second compound other than the first compound, having any one of the structures of the following formulas (II-1), (II-2), (II-3), and (II-4) and having a molecular weight of 250 or more: 【Chemical 2】 (In the formula, the benzene ring may have a substituent).

2. The composition according to claim 1, wherein the second compound is at least one compound selected from the group consisting of ethylhexyl methoxycinnamate, octocrylene, ethylhexyl salicylate, homosalate, bis-ethylhexyloxyphenol methoxyphenyl triazine, diethylamino hydroxybenzoyl hexyl benzoate, ethylhexyl triazone, polysilicone-15, t-butyl methoxydibenzoylmethane, phenylbenzimidazole sulfonic acid, and terephthalylidene dicamphor sulfonic acid.

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

4. The composition according to claim 3, wherein the first compound is 0.01 parts by mass or more and 50 parts by mass or less based on 100 parts by mass in total of the polar oil and the first compound.

5. The composition according to any one of claims 1 to 4, which is an oil-in-water type cosmetic.

6. The composition according to any one of claims 1 to 4, which is a water-in-oil type cosmetic.

7. The composition according to any one of claims 1 to 4, which is an oily cosmetic.

8. The composition according to any one of claims 1 to 4, which is a sunscreen cosmetic composition.

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