Cosmetic composition

Abstract

Provided is a cosmetic composition which contains a compound I having a structure represented by formula (I) and which maintains or improves the solubility of the compound I in the oil content. A cosmetic composition comprising a compound I having a structure represented by formula (I) (in the formula,-OA represents an alkoxy group), a polar oil, a first silicone oil having a dynamic viscosity of 10 cSt or more at 25 DEG C and not having a benzene ring, and a compatible oil agent compatible with both the polar oil and the first silicone oil.

Description

Technical Field

[0001] The present invention relates to cosmetic compositions. Background Art

[0002] It is generally believed that ultraviolet rays generate free radicals in the body, causing sebum oxidation and damage to cellular DNA. Such harmful effects on the skin caused by ultraviolet rays include skin cancer, photoaging, spots, wrinkles, and inflammation, which are undesirable from the perspective of health and beauty.

[0003] Examples of ultraviolet rays include medium-wavelength ultraviolet rays (UVB region: wavelength 290-320 nm) known to cause sunburn and inflammation, and long-wavelength ultraviolet rays (UVA region: wavelength 320-400 nm) known to cause photoaging.

[0004] Numerous UV absorbers have been developed to protect the skin from UV rays. For example, the UV absorber disclosed in Patent Document 1 possesses the following unprecedented properties: it absorbs UV rays in both the UVA and UVB regions, exhibits UV-inhibiting properties across a wide range of wavelengths, and increases its UV absorption capacity in both the UVA and UVB regions with the passage of UV irradiation time.

[0005] More specifically, the ultraviolet absorber of Patent Document 1 contains a compound represented by General Formula I as an active ingredient.

[0006]

[0007] (Wherein, -OA represents an alkoxy group.)

[0008] Prior art literature

[0009] Patent Literature

[0010] Patent Document 1: International Publication No. 2009 / 041098 Summary of the Invention

[0011] Problems to be solved by the invention

[0012] It is known that the compound of the general formula I in Patent Document 1 has a property of being soluble in polar oils.

[0013] However, if a large amount of polar oil is blended into a cosmetic, there is a possibility that the usability of the cosmetic may be limited.

[0014] On the other hand, cosmetics often contain hydrocarbon oils and short-chain silicones that are compatible with polar oils. However, in-depth research by the present inventors has revealed that when hydrocarbon oils and short-chain silicones are added as oil components in addition to polar oils, the solubility of the compound of Formula I in the oil component may decrease.

[0015] The present invention aims to improve the above situation and has an object to provide a cosmetic composition comprising a compound I having a structure of formula (I) (the same as the above general formula I) and maintaining or improving the solubility of the compound I in oil.

[0016] Means for solving problems

[0017] The present invention for achieving the above-mentioned object is as follows.

[0018] <Scheme 1>

[0019] A cosmetic composition comprising: Compound I having the structure of the following formula (I): Polar oil, A first silicone oil having a dynamic viscosity of 10 cSt or more at 25°C and having no benzene ring, and A compatibilizing agent that is compatible with both the polar oil and the first silicone oil.

[0020]

[0021] (wherein -OA represents an alkoxy group)

[0022] Option 2

[0023] In the cosmetic composition according to embodiment 1, the compatibilizing oiling agent is a hydrocarbon oil and / or a second silicone oil having a dynamic viscosity of 6 cSt or less at 25°C.

[0024] Option 3

[0025] The cosmetic composition according to embodiment 1 or 2, wherein the amount of the compound I is 0.1 to 10 parts by mass based on 100 parts by mass of the total of the compound I, the polar oil, the first silicone oil, and the compatibilizing oiling agent.

[0026] Option 4

[0027] The cosmetic composition according to any one of aspects 1 to 3, wherein the polar oil is contained in an amount of 0.1 to 99 parts by mass relative to 100 parts by mass of the total of the compound I and the polar oil.

[0028] <Scheme 5>

[0029] The cosmetic composition according to any one of aspects 1 to 4, wherein the first silicone oil is present in an amount of 0.1 to 20 parts by mass based on 100 parts by mass of the total of the compound I, the polar oil, the first silicone oil, and the compatibilizing oiling agent.

[0030] <Scheme 6>

[0031] The cosmetic composition according to any one of aspects 1 to 5, wherein the compatibilizing oiling agent is contained in an amount of 10 to 90 parts by mass relative to 100 parts by mass of the total of the first silicone oil and the compatibilizing oiling agent.

[0032] <Scheme 7>

[0033] An oil-in-water emulsified cosmetic comprising the cosmetic composition according to any one of claims 1 to 6.

[0034] <Scheme 8>

[0035] According to the oil-in-water emulsified cosmetic of embodiment 7, the content of the compound I is 0.01 to 10% by mass.

[0036] <Scheme 9>

[0037] In the oil-in-water emulsified cosmetic according to embodiment 7 or 8, the content of the polar oil is 0.1 to 50% by mass.

[0038] <Scheme 10>

[0039] A water-in-oil emulsified cosmetic comprising the cosmetic composition according to any one of claims 1 to 6.

[0040] Plan 11

[0041] According to the water-in-oil emulsified cosmetic of embodiment 10, the content of the compound I is 0.01 to 10% by mass.

[0042] <Scheme 12>

[0043] According to the water-in-oil emulsified cosmetic according to embodiment 10 or 11, the content of the polar oil is 0.1 to 50% by mass.

[0044] Effects of the Invention

[0045] According to the present invention, there can be provided a cosmetic composition comprising a compound I having a structure represented by formula (I) and in which the solubility of the compound I in oil is maintained or improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a graph showing the absorbance of each sample of Examples 1 and 2, Comparative Example 1, and Reference Examples 1 and 2.

[0047] Figure 2 It is a graph showing the absorbance of each sample of Examples 3 and 4, Comparative Examples 2 and 3, and Reference Examples 3 and 4. DETAILED DESCRIPTION

[0048] Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited to the following embodiments, and can be implemented with various modifications within the scope of the gist of the invention.

[0049] Cosmetic composition

[0050] The cosmetic composition of the present invention (hereinafter, also referred to as "the composition of the present invention") is a cosmetic composition comprising or consisting of the following substances: Compound I having the structure of the following formula (I): Polar oil, A first silicone oil having a dynamic viscosity of 10 cSt or more at 25°C and having no benzene ring, and A compatibilizer that is compatible with both polar oil and the first silicone oil.

[0051]

[0052] (wherein -OA represents an alkoxy group)

[0053] As described above, it was found that when hydrocarbon oil or short-chain silicone is used as the oil component in addition to the polar oil, the solubility of Compound I in the oil component may decrease.

[0054] In contrast, further in-depth research by the present inventors has revealed that the solubility of Compound I can be maintained or improved by mixing a silicone oil having a specific dynamic viscosity and a specific structure (i.e., the aforementioned "first silicone oil") with the polar oil, as well as a compatibilizing agent that is compatible with both the polar oil and the first silicone oil.

[0055] Generally speaking, in cosmetic compositions containing polar oils, hydrocarbon oils and / or short-chain silicone oils (e.g., silicone oils having a dynamic viscosity of less than 10 cSt at 25°C) are often used in combination as other oily ingredients. This is because hydrocarbon oils and short-chain silicone oils have good compatibility with polar oils, and therefore, when mixed, they become compatible with each other.

[0056] In contrast, in the present invention, surprisingly, by deliberately selecting a "first silicone oil" that is generally incompatible or poorly compatible with polar oils, and then mixing it with a compatibilizing agent that is compatible with both the polar oil and the first silicone oil, the solubility of Compound I can be maintained or improved without increasing the content of the polar oil.

[0057] Hereinafter, each component that may be contained in the composition of the present invention will be described in detail.

[0058] <Compound I>

[0059] The compound I contained in the composition of the present invention has the structure of the following formula (I):

[0060] (wherein -OA represents an alkoxy group)

[0061] In formula (I), -OA represents an alkoxy group, and more specifically, a methoxy group or an ethoxy group can be mentioned, but the present invention is not limited thereto. This compound I can be used as a UVA and UVB absorber.

[0062] In the present invention, Compound I may have the same structure as the compound represented by Formula I disclosed in Patent Document 1. In the present invention, Compound I may be, for example, 2-methylphenyl 4-methoxycinnamate.

[0063] In the composition of the present invention, the content of Compound I is not particularly limited. For example, the content of Compound I can be adjusted as follows.

[0064] That is, in the composition of the present invention, the amount of Compound I, for example, may be 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, 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, or 10 parts by mass or more, and may be 15 parts by mass or less, 14 parts by mass or less, 13 parts by mass or less, 12 parts by mass or less, 11 parts by mass or less, or 10 parts by mass or less.

[0065] Polar Oil

[0066] In the present invention, the term "polar oil" refers to an oil with high polarity among oils that can be used in cosmetics, excluding silicone oils, and refers to an oil having an IOB value of 0.10 or higher, 0.11 or higher, 0.12 or higher, or 0.13 or higher. Furthermore, the IOB value of the polar oils of the present invention may be 1.50 or lower, 1.00 or lower, 0.95 or lower, 0.90 or lower, 0.85 or lower, 0.80 or lower, 0.75 or lower, 0.70 or lower, 0.65 or lower, 0.60 or lower, 0.55 or lower, 0.50 or lower, 0.45 or lower, or 0.40 or lower.

[0067] In addition, the so-called IOB value is an abbreviation of Inorganic / Organic Balance, which is a value indicating the ratio of the inorganic value to the organic value, and is a value that serves as an indicator of the degree of polarity of an organic compound. Specifically, the IOB value is expressed as IOB value = inorganic value / organic value. Regarding the "inorganic value" and "organic value", for example, the "inorganic value" corresponding to various atoms or functional groups in the molecule is 20 for one carbon atom and 100 for one hydroxyl group, and the "inorganic value" and "organic value" are accumulated for all atoms and functional groups in the organic compound, so that the IOB value of the organic compound can be calculated (for example, refer to Yoshio Koda's " (Organic Concept Map - Fundamentals and Applications -), pp. 11-17, Sankyo Publishing, 1984).

[0068] In the present invention, the polar oil may be, for example, at least one selected from ester oils, ether oils, higher alcohols, and fatty acids having an IOB value of 0.10 or greater.

[0069] More specifically, the polar oil may be, for example, selected from bisethoxydiglycol cyclohexane-1,4-dicarboxylate (IOB value = 1.03), phenoxyethyl octanoate (IOB value = 0.29), PPG-30 buteth-30 (IOB value = 0.94), diisopropyl sebacate (IOB value = 0.4), neopentyl glycol diheptanoate (IOB value = 0.33), diethoxyethyl succinate (IOB value = 1.13), diethylhexyl succinate (IOB value = 0.32), isononyl isononanoate (IOB value = 0.2), isopropyl myristate (IOB value = 0.18), octyl palmitate (IOB value = 0.13), palmitic acid. isopropyl stearate (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), pentaerythritol tetraethylhexanoate (IOB value = 0.35), dioctyl succinate (IOB value = 0.36), ethylene glycol distearate (IOB value = 0.16), glyceryl diisostearate (IOB value = 0.29), neopentyl glycol dicaprate (IOB value = 0. 25), diisostearyl malate (IOB value = 0.28), trimethylolpropane triisostearate (IOB value = 0.16), tri-2-ethylhexanoin (triisooctanoin) (IOB value = 0.35), trimethylolpropane trioctanoate (IOB value = 0.33), trimethylolpropane triisostearate (IOB value = 0.16), diisobutyl adipate (IOB value = 0.46), 2-octyldodecyl N-lauroyl-L-glutamate (IOB value = 0.29), 2-hexyldecyl adipate (IOB value = 0.16), ethylhexyl methoxycinnamate (IOB value = 0.28), octyl The present invention also includes at least one of: lin (IOB value = 0.32), ethylhexyl salicylate (IOB value = 0.58), alkyl (C12-15) benzoate (IOB value = 0.17 to 0.2), phenylethyl benzoate (IOB value = 0.30), butyloctyl salicylate (IOB value = 0.46), 2-ethylhexyl palmitate (IOB value = 0.13), 2-ethylhexyl ethylhexanoate (IOB value = 0.2), glyceryl triisostearate (IOB value = 0.16), PPG-3 dipivalate (IOB value = 0.52) and tri(caprylic / capric)glyceryl (IOB value = 0.33), but is not limited to these.

[0070] In the composition of the present invention, the content of the polar oil is not particularly limited, and the content of the polar oil can be adjusted, for example, as follows.

[0071] That is, in the composition of the present invention, the polar oil may be, for example, 0.1 parts by mass or more, 1.0 parts by mass or more, 2.0 parts by mass or more, 3.0 parts by mass or more, 5.0 parts by mass or more, 5.0 parts by mass or more, 6.0 parts by mass or more, 7.0 parts by mass or more, 8.0 parts by mass or more, 9.0 parts by mass or more, 10 parts by mass or more, 15 parts by mass or more, 20 parts by mass or more, 25 parts by mass or more, 30 parts by mass or more, 35 parts by mass or more, 40 parts by mass or more, 45 parts by mass or more, 50 parts by mass or more, 55 parts by mass or more, 60 parts by mass or more, The amount of the present invention is 2,4,65,70,75,80, or 85 parts by mass or more, and may be 99 parts by mass or less, 95 parts by mass or less, 90 parts by mass or less, 85 parts by mass or less, 80 parts by mass or less, 75 parts by mass or less, 70 parts by mass or less, 65 parts by mass or less, 60 parts by mass or less, 55 parts by mass or less, 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, 10 parts by mass or less, or 8.0 parts by mass or less.

[0072] In the composition of the present invention, the content of the polar oil can be appropriately adjusted according to the content of the first silicone oil and the content of Compound I used in combination.

[0073] 〈1st silicone oil〉

[0074] The first silicone oil contained in the composition of the present invention has a dynamic viscosity of 10 cSt or more at 25° C. and does not have a benzene ring.

[0075] In the present invention, "dynamic viscosity" is the absolute viscosity of a liquid oil divided by its density. This is measured based on the principle that the time it takes for a liquid oil to fall from a capillary tube is proportional to its viscosity. In the present invention, the dynamic viscosities of the first and second silicone oils described below are measured at 25°C and are expressed in centistokes (cSt).

[0076] In addition, it is known that the dynamic viscosity of silicone oil is generally proportional to the length of the main skeleton formed by the siloxane bond of the silicone oil. More specifically, it is known that the shorter the main skeleton of the silicone oil, the lower its dynamic viscosity, while on the other hand, the longer the main skeleton of the silicone oil, the higher its dynamic viscosity.

[0077] As mentioned above, short-chain silicone oils (i.e., silicone oils with relatively low dynamic viscosities, more specifically, silicone oils with dynamic viscosities of less than 10 cSt at 25°C) are often used in combination with polar oils due to their good compatibility with polar oils. In contrast, the composition of the present invention is characterized by the intentional use of a first silicone oil having a dynamic viscosity of 10 cSt or greater at 25°C, which is generally incompatible or poorly compatible with polar oils.

[0078] In the present invention, the dynamic viscosity at 25°C of the first silicone oil can be more specifically, for example, 10 cSt or more, 15 cSt or more, 20 cSt or more, 25 cSt or more, 30 cSt or more, 35 cSt or more, 40 cSt or more, 45 cSt or more, 50 cSt or more, 55 cSt or more, 60 cSt or more, 65 cSt or more, 70 cSt or more, 75 cSt or more, 80 cSt or more, 85 cSt or more, 90 cSt or more, 95 cSt or more, or 100 cSt or more; and can be 1000 cSt or less, 800 cSt or less, 500 cSt or less, 100 cSt or less, 90 cSt or less, 80 cSt or less, 70 cSt or less, 60 cSt or less, 50 cSt or less, 40 cSt or less, 30 cSt or less, or 20 cSt or less.

[0079] Furthermore, since silicone oils having a benzene ring in their structure (e.g., Examples 6 and 7 described later) generally have high polarity and good compatibility with polar oils, there is little surprise from the perspective of solubilizing Compound I. In contrast, the composition of the present invention is characterized by the use of a first silicone oil that does not have a benzene ring in its structure.

[0080] In the present invention, the first silicone oil having no benzene ring is not particularly limited, and may be, for example, a linear silicone oil having no benzene ring.

[0081] More specifically, the first silicone oil according to the present invention may be, for example, polydimethylsiloxane ("methylpolysiloxane").

[0082] In the present invention, a commercially available product can be used as the first silicone oil. For example, products manufactured by Shin-Etsu Chemical Co., Ltd. under the trade names "KF-96A-10CS," "KF-96A-20CS," "KF-96A-30CS," "KF-96A-50CS," "KF-96A-100CS," and "KF-96A-200CS" can be used, but are not limited to these.

[0083] In the present invention, the first silicone oil may be non-volatile.

[0084] In the present invention, the term "volatile" oil refers to oils having a boiling point of 260°C or less at normal pressure (1 atmosphere). Correspondingly, in the present invention, the term "non-volatile" oil refers to oils having a boiling point exceeding 260°C at atmospheric pressure (1 atmosphere).

[0085] In the composition of the present invention, the content of the first silicone oil is not particularly limited. For example, the content of the first silicone oil can be adjusted as follows.

[0086] That is, in the composition of the present invention, the first silicone oil may be, for example, 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 Compound I, polar oil, first silicone oil and compatibilizing oil agent. The amount of the present invention may be 20 parts by mass or less, 19 parts by mass or less, 18 parts by mass or less, 17 parts by mass or less, 16 parts by mass or less, 15 parts by mass or less, 14 parts by mass or less, 13 parts by mass or less, 12 parts by mass or less, 11 parts by mass or less, 10 parts by mass or less, or 9.0 parts by mass or less.

[0087] Compatible oil dispersant

[0088] The compatibilizing agent included in the composition of the present invention is compatible with both the polar oil and the first silicone oil. The inclusion of the compatibilizing agent in the composition of the present invention allows the polar oil and the first silicone oil to be compatible. In other words, in the composition of the present invention, the polar oil, the first silicone oil, and the compatibilizing agent can be dissolved and mixed in one another by stirring as needed, i.e., visually observed as a single oil phase.

[0089] In the composition of the present invention, the content of the compatibilizing oiling agent is not particularly limited. For example, the content of the compatibilizing oiling agent can be adjusted as follows.

[0090] That is, in the composition of the present invention, the compatibilizing oiling agent may be, for example, 10 parts by mass or more, 20 parts by mass or more, 30 parts by mass or more, 40 parts by mass or more, or 50 parts by mass or less, or 90 parts by mass or less, 80 parts by mass or less, 70 parts by mass or less, 60 parts by mass or less, or 50 parts by mass or less, relative to 100 parts by mass of the total of the first silicone oil and the compatibilizing oiling agent.

[0091] The compatibilizing agent included in the composition of the present invention is not particularly limited, as long as it is compatible with both the polar oil and the first silicone oil. More specifically, in the composition of the present invention, the compatibilizing agent may be, for example, a hydrocarbon oil and / or a second silicone oil having a dynamic viscosity of 6 cSt or less at 25°C.

[0092] (Hydrocarbon oil)

[0093] In the present invention, hydrocarbon oil refers to hydrocarbon oil other than the above-mentioned polar oils.

[0094] The hydrocarbon oil may be a volatile hydrocarbon oil or a non-volatile hydrocarbon oil.

[0095] 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.

[0096] (Second silicone oil)

[0097] In the present invention, the second silicone oil refers to a silicone oil having a dynamic viscosity of 6 cSt or less at 25°C.

[0098] Therefore, the dynamic viscosity of the second silicone oil at 25°C can be more specifically, for example, 6 cSt or less, 5.5 cSt or less, 5.0 cSt or less, 4.5 cSt or less, 4.0 cSt or less, 3.5 cSt or less, 3.0 cSt or less, 2.5 cSt or less, 2.0 cSt or less, or 1.5 cSt or less, and can also be 1.0 cSt or more or 1.5 cSt or more.

[0099] More specifically, the second silicone oil according to the present invention may be, for example, polydimethylsiloxane ("methylpolysiloxane").

[0100] In the present invention, commercially available products can be used as the second silicone oil. For example, products such as "KF-96L-1.5CS," "KF-96A-6T," "KF-96L-1CS," and "KF-96L-2CS" manufactured by Shin-Etsu Chemical Co., Ltd. can be used, but are not limited to these.

[0101] In the present invention, the second silicone oil may be a volatile silicone oil or a non-volatile silicone oil, but preferably contains a volatile silicone oil.

[0102] Other ingredients

[0103] In addition to the above-mentioned ingredients, the cosmetic composition of the present invention may further contain any aqueous component or other ingredients used in the cosmetics field. Examples of other ingredients include, but are not limited to, oils other than the above-mentioned oils, ultraviolet scattering agent particles, ultraviolet absorbers, surfactants, humectants, metal ion blocking agents, natural and synthetic polymers, water-soluble and oil-soluble polymers, various extracts, colorants such as organic dyes, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, cooling agents, antiperspirants, antiseptics, skin revitalizers, other drugs, and various powders.

[0104] Cosmetics

[0105] The composition of the present invention can be suitably used as a cosmetic or a raw material thereof. In addition, the composition of the present invention can be suitably used as, for example, a sunscreen cosmetic, a makeup base, a daily emulsion, or a raw material thereof.

[0106] The dosage form of the cosmetic of the present invention is not particularly limited, and examples thereof include liquid, emulsion, gel, and cream, but are not limited thereto.

[0107] Furthermore, the present invention can provide, for example, an oil-in-water emulsified cosmetic comprising the composition of the present invention, a water-in-oil emulsified cosmetic comprising the composition of the present invention, and an oily cosmetic comprising the composition of the present invention.

[0108] <Oil-in-water emulsified cosmetic composition>

[0109] The oil-in-water emulsified cosmetic according to the present invention may contain the composition of the present invention in its dispersed phase (internal phase).

[0110] In the oil-in-water emulsified cosmetic according to the present invention, the content of Compound I is not particularly limited. For example, the content may be 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, or 3.0% by mass or less, relative to the total amount of the cosmetic. In addition, the content may be 10% by mass or less, 9.0% by mass or less, 8.0% by mass or less, 7.0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 4.0% by mass or less, or 3.0% by mass or less.

[0111] In addition, in the oil-in-water emulsion cosmetic of the present invention, the content of the polar oil is not particularly limited. For example, relative to the total amount of the cosmetic, it can be 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 5.0% by mass or more, 10% by mass or more, 15% by mass or more, or 20% by mass or less. In addition, it can be 50% by mass or less, 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, or 20% by mass or less.

[0112] In addition, in the oil-in-water emulsion cosmetic according to the present invention, the water content is not particularly limited. For example, relative to the total amount of the cosmetic, it can be 30% by mass or more, 35% by mass or more, 40% by mass or more, 45% by mass or more, 50% by mass or more, 55% by mass or more, 60% by mass or more, 65% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, or 85% by mass or more. In addition, it can be 90% by mass or less, 85% by mass or less, 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, 60% by mass or less, or 55% by mass or less.

[0113] Furthermore, the oil-in-water emulsion cosmetic of the present invention may further contain a surfactant as needed. The content of the surfactant when included is not particularly limited, but may be, for example, 0.1% by mass or more, 0.5% by mass or more, or 1.0% by mass or less, or 10% by mass or less, 5.0% by mass or less, or 3.0% by mass or less, relative to the total amount of the cosmetic.

[0114] The oil-in-water emulsion cosmetic of the present invention may further contain, in addition to the aforementioned ingredients, any aqueous component or other ingredients commonly used in the cosmetics field. Examples of other ingredients include, but are not limited to, oils other than the aforementioned oils, ultraviolet scattering agent particles, ultraviolet absorbers, moisturizers, metal ion blocking agents, natural and synthetic polymers, water-soluble and oil-soluble polymers, various extracts, colorants such as organic dyes, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, cooling agents, antiperspirants, antiseptics, skin revitalizers, other pharmaceutical agents, and various powders.

[0115] 〈Water-in-oil emulsified cosmetics〉

[0116] The water-in-oil emulsified cosmetic according to the present invention may contain the composition of the present invention in its continuous phase (external phase).

[0117] In the water-in-oil emulsion cosmetic according to the present invention, the content of Compound I is not particularly limited. For example, the content may be 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, or 3.0% by mass or less, relative to the total amount of the cosmetic. In addition, the content may be 10% by mass or less, 9.0% by mass or less, 8.0% by mass or less, 7.0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 4.0% by mass or less, or 3.0% by mass or less.

[0118] In addition, in the water-in-oil emulsion cosmetic according to the present invention, the content of the polar oil is not particularly limited. For example, it may be 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 5.0% by mass or more, 10% by mass or more, 15% by mass or more, or 20% by mass or less, and may be 50% by mass or less, 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, or 20% by mass or less.

[0119] In addition, in the water-in-oil emulsion cosmetic according to the present invention, the water content is not particularly limited. For example, the water content may be 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, 45% by mass or more, or 50% by mass or more, relative to the total amount of the cosmetic. In addition, the water content may be 65% by mass or less, 60% by mass or less, or 55% by mass or less.

[0120] Furthermore, the water-in-oil emulsion cosmetic of the present invention may further contain a surfactant as needed. The content of the surfactant when included is not particularly limited, and for example, may be 0.1% by mass or more, 0.5% by mass or more, or 1.0% by mass or less, or 10% by mass or less, 5.0% by mass or less, or 3.0% by mass or less, relative to the total amount of the cosmetic.

[0121] The water-in-oil emulsion cosmetic of the present invention may further contain, in addition to the aforementioned ingredients, any aqueous components or other ingredients commonly used in the cosmetics field. Examples of other ingredients include, but are not limited to, oils other than the aforementioned oils, ultraviolet scattering agent particles, ultraviolet absorbers, moisturizers, metal ion blocking agents, natural and synthetic polymers, water-soluble and oil-soluble polymers, various extracts, colorants such as organic dyes, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, cooling agents, antiperspirants, antiseptics, skin revitalizers, other pharmaceutical agents, and various powders.

[0122] Oily cosmetics

[0123] In the present invention, the term "oil-based cosmetic" refers to a cosmetic having a single oil phase. Oil-based cosmetics generally do not substantially contain water separated from the oil phase.

[0124] In the oily cosmetic according to the present invention, the content of Compound I is not particularly limited. For example, the content may be 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, or 3.0% by mass or less, relative to the total amount of the cosmetic. In addition, the content may be 10% by mass or less, 9.0% by mass or less, 8.0% by mass or less, 7.0% by mass or less, 6.0% by mass or less, 5.0% by mass or less, 4.0% by mass or less, or 3.0% by mass or less.

[0125] In addition, in the oily cosmetics according to the present invention, the content of the polar oil is not particularly limited. For example, it may be 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, 5.0% by mass or more, 10% by mass or more, 15% by mass or more, or 20% by mass or less, and may be 50% by mass or less, 45% by mass or less, 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, or 20% by mass or less.

[0126] In addition to the aforementioned ingredients, the oil-based cosmetics of the present invention may further contain any aqueous ingredients or other ingredients commonly used in the cosmetics field. Examples of other ingredients include, but are not limited to, oils other than the aforementioned oils, ultraviolet scattering agent particles, ultraviolet absorbers, moisturizers, metal ion blocking agents, natural and synthetic polymers, oil-soluble polymers, various extracts, colorants such as organic dyes, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, cooling agents, antiperspirants, antiseptics, skin revitalizers, other pharmaceutical agents, and various powders.

[0127] Example

[0128] The present invention will be described in further detail below with reference to Examples, but the present invention is not limited thereto.

[0129] Examples 1 to 7 Evaluation of the Solubility of Compound I in Oil

[0130] Based on the composition of Table 1-1 below, the compositions of Examples 1 to 7 shown in Table 1-2 were prepared. Furthermore, as Compound I blended into each composition, a compound represented by the following structural formula was used (the same was used in each of Examples 8 to 21 and each of the Examples and Comparative Examples shown below):

[0131] A total of 40 g of each composition was added to each 50 mL screw tube. Compound I was added in an amount greater than its solubility in the polar oil used.

[0132] Evaluation method: Compound I was dissolved in the oil by heating at 80°C, and then allowed to stand in a thermostatic bath at 0°C for one week. Furthermore, the amount of crystallized Compound I was visually evaluated in three stages using the following criteria. The evaluation results are shown in Table 1-2.

[0133] (Evaluation Criteria)

[0134] “A”: no crystallization was observed; “B”: a small amount of crystallization was observed; "C": A large amount of crystals were observed.

[0135]

[0136] As is clear from the results in Table 1-1, in Examples 1 to 5, in the cases (i) where no silicone oil was mixed (i.e., composition 1) and (ii) where a silicone oil having a dynamic viscosity of less than 10 cSt at 25°C was mixed (i.e., compositions 2 and 3), crystallization of Compound I was observed even when isododecane was mixed as a compatibilizing oil, indicating that the solubility of Compound I in these oils was poor.

[0137] Furthermore, it was found that in Examples 1, 2, 4, and 5, crystals of Compound I were observed, that is, the solubility of Compound I in these oils was poor.

[0138] On the other hand, it can be seen that in Examples 3 to 5, when silicone oil having a dynamic viscosity of 10 cSt or more at 25°C and no benzene ring and isododecane (a compatibilizing agent) were used (i.e., in the cases of Compositions 2 and 3), the solubility of Compound I in the oil component was improved.

[0139] Furthermore, it can be seen that in Examples 6 and 7, when silicone oils containing a benzene ring in their structure were used (i.e., in the cases of Compositions 2 to 4), the solubility of Compound I in the oil component was good, regardless of whether a compatibilizing oiling agent was added. This is presumably because silicone oils containing a benzene ring in their structure generally have high polarity and good compatibility with polar oils.

[0140] Examples 8 to 14 Evaluation of the Solubility of Compound I in Oil

[0141] Based on the compositions shown in Table 2-1 below, the compositions of Examples 8 to 14 shown in Table 2-2 were prepared. Compound I was added in an amount greater than its solubility in the polar oil used, and the amount of crystallized Compound I was evaluated in the same manner as above. The evaluation results are shown in Table 2-2.

[0142]

[0143] From the results in Table 2-2, it is clear that the solubility of Compound I in Examples 8 to 14 shows almost the same tendency as that in Examples 1 to 7 in Table 1-2, in which the types of polar oils blended are different.

[0144] Examples 15 to 21 Evaluation of the Solubility of Compound I in Oil

[0145] Based on the compositions shown in Table 3-1 below, the compositions of Examples 15 to 21 shown in Table 3-2 were prepared. Compound I was added in an amount greater than its solubility in the polar oil used, and the amount of crystallized Compound I was evaluated in the same manner as above. The evaluation results are shown in Table 3-2.

[0146]

[0147] The results in Table 3-2 clearly show that the solubility of Compound I in Examples 15 to 21 shows almost the same tendency as that in Examples 1 to 7 in Table 1-2 and Examples 8 to 14 in Table 2-2, which differ in the type of polar oil blended.

[0148] Examples 1 and 2, Comparative Example 1, and Reference Examples 1 and 2

[0149] Based on the composition of Table 4 below, water-in-oil emulsified cosmetics of each example were prepared. Then, about 50 mg of each cosmetic sample was dripped onto the hydrophilic surface of a test plate made of transparent polymethyl methacrylate (PMMA) with a hydrophilic surface of 5 cm × 5 cm in size, and spread on the entire surface of the test plate with a finger and dried to prepare a test sample. Furthermore, using a spectrophotometer (U-3500 self-recording spectrophotometer, manufactured by Hitachi, Ltd.), the absorbance at 280 to 400 nm was measured. The measurement results are shown in Figure 1 middle.

[0150]

[0151] like Figure 1As shown, Reference Examples 1 and 2 both exhibited high absorbance as expected. This is presumably because Reference Examples 1 and 2 used silicone oils having a benzene ring structure, which have high polarity and good compatibility with polar oils, resulting in good solubility of Compound I.

[0152] Furthermore, Examples 1 and 2 exhibited higher absorbance than Comparative Example 1. This suggests that the solubility of Compound I in the compositions of Examples 1 and 2 was improved compared to Comparative Example 1.

[0153] 《Examples 3 and 4, Comparative Examples 2 and 3, and Reference Examples 3 and 4》

[0154] Based on the composition shown in Table 5 below, each water-in-oil emulsified cosmetic was prepared. The absorbance at 280 to 400 nm was measured in the same manner as above except that each cosmetic sample was applied to the hydrophobic surface of a test plate having a hydrophobic surface. The measurement results are shown in Table 5. Figure 2 middle.

[0155]

[0156] Depend on Figure 2 The results clearly show that higher absorbance was exhibited in both Examples 3 and 4 than in Comparative Examples 2 and 3. This suggests that the solubility of Compound I in the compositions of Examples 3 and 4 was improved compared to that in Comparative Examples 2 and 3.

Claims

1. A cosmetic composition comprising: Compound I having the structure of the following formula (I): Polar oil, A first silicone oil having a dynamic viscosity of 10 cSt or more at 25°C and having no benzene ring, and a compatibilizing agent that is compatible with both the polar oil and the first silicone oil, In the formula, -OA represents an alkoxy group. 2 . The cosmetic composition according to claim 1 , wherein the compatibilizing oiling agent is a hydrocarbon oil and / or a second silicone oil having a dynamic viscosity of 6 cSt or less at 25° C. 3 . The cosmetic composition according to claim 1 , wherein the amount of the compound I is 0.1 to 15 parts by mass based on 100 parts by mass of the total of the compound I, the polar oil, the first silicone oil, and the compatibilizing oiling agent. 4 . The cosmetic composition according to claim 1 , wherein the polar oil is present in an amount of 0.1 to 99 parts by mass based on 100 parts by mass of the total of the compound I and the polar oil. 5 . The cosmetic composition according to claim 1 , wherein the first silicone oil is present in an amount of 0.1 to 20 parts by mass based on 100 parts by mass of the total of the compound I, the polar oil, the first silicone oil, and the compatibilizing oiling agent. 6 . The cosmetic composition according to claim 1 , wherein the compatibilizing oiling agent is contained in an amount of 10 to 90 parts by mass based on 100 parts by mass of the total of the first silicone oil and the compatibilizing oiling agent.

7. An oil-in-water emulsified cosmetic comprising the cosmetic composition according to any one of claims 1 to 6. 8 . The oil-in-water emulsified cosmetic according to claim 7 , wherein the content of the compound I is 0.01 to 10% by mass. 9 . The oil-in-water emulsified cosmetic according to claim 7 , wherein the content of the polar oil is 0.1 to 50% by mass.

10. A water-in-oil emulsified cosmetic comprising the cosmetic composition according to any one of claims 1 to 6. The water-in-oil emulsified cosmetic according to claim 10 , wherein the content of the compound I is 0.01 to 10% by mass. 12 . The water-in-oil emulsified cosmetic according to claim 10 , wherein the content of the polar oil is 0.1 to 50% by mass.

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