Oil-in-water emulsion cosmetic composition

Abstract

Provided is an oil-in-water emulsion cosmetic composition having high ultraviolet absorbing ability.　The oil-in-water emulsified cosmetic composition contains: at least one of polysilicone-15 and drometrizole trisiloxane; terephthalylidene dicamphor sulfonic acid and / or a salt thereof; an emulsifier; an oil component other than polysilicone-15 and drometrizole trisiloxane; and water. The emulsifier contains at least one selected from the group consisting of PEG-30 phytosteryl, glyceryl stearate, ethoxylated hydrogenated caster oil having an HLB value of 14-20, PPG-8 ceteth-20, and stearoxyhydroxypropyl methylcellulose.

Description

Oil-in-water emulsion cosmetic composition

[0001] The present invention relates to an oil-in-water emulsion cosmetic composition.

[0002] From the viewpoint of protecting the skin from sunlight, many sunscreen cosmetics having ultraviolet protection effects have been developed.

[0003] For example, Patent Document 1 discloses a composition comprising: (a) at least one lipophilic or oil-soluble organic UV filter; (b) at least one hydrophilic or water-soluble organic UV filter; and (c) at least one organic porous filler having an oil absorption capacity of 300 mL / 100 g or more, preferably 400 mL / 100 g or more, and more preferably 500 mL / 100 g or more.

[0004] Furthermore, Patent Document 2 discloses a composition in the form of a W / O emulsion, which contains (a) at least one organic UV filter, (b) at least one spherical hydrophobic silica, and (c) water.

[0005] JP 2018-024582 A JP 2023-032127 A

[0006] In order to obtain a higher SPF (Sun Protection Factor), it is conceivable to blend two or more types of organic UV filters (also called "ultraviolet absorbers"), as disclosed in, for example, the above-mentioned Patent Document 1.

[0007] However, the present inventors have found that when they have prepared oil-in-water emulsion cosmetic compositions using, as ultraviolet absorbers, terephthalylidene dicamphorsulfonic acid (and / or a salt thereof), which is capable of absorbing ultraviolet light in the UVA region (wavelength region from about 320 nm to about 400 nm), in combination with either or both of polysilicone-15 and drometrizole trisiloxane, which are capable of absorbing ultraviolet light in the UVB region (wavelength region from about 280 nm to about 320 nm), the ultraviolet absorption performance may be impaired.

[0008] The present invention is intended to improve the above-mentioned circumstances, and an object of the present invention is to provide an oil-in-water emulsion cosmetic composition having improved ultraviolet absorbing ability.

[0009] The present invention that achieves the above object is as follows.

[0010] Aspect 1: An oil-in-water emulsion cosmetic composition comprising: at least one of polysilicone-15 and drometrizole trisiloxane; terephthalylidene dicamphorsulfonic acid and / or a salt thereof; an emulsifier; an oil component other than the polysilicone-15 and the drometrizole trisiloxane; and water, wherein the emulsifier comprises at least one selected from the group consisting of PEG-30 phytosteryl, glyceryl stearate, polyoxyethylene hydrogenated castor oil having an HLB value of 14 to 20, PPG-8 ceteth-20, and stearoxyhydroxypropyl methylcellulose. Aspect 2: The composition according to Aspect 1, further comprising a hydrophilic thickener. Aspect 3: The composition according to Aspect 2, wherein the hydrophilic thickener comprises an acrylic thickener. Aspect 4: The composition according to any one of Aspects 1 to 3, comprising both the polysilicone-15 and the drometrizole trisiloxane. Aspect 5: The composition according to any one of Aspects 1 to 4, wherein the total content of the terephthalylidene dicamphorsulfonic acid and its salts is 0.1 to 10% by mass. Aspect 6: The composition according to any one of Aspects 1 to 5, wherein the content of the polysilicone-15, when present, is 0.1 to 15% by mass. Aspect 7: The composition according to any one of Aspects 1 to 6, wherein the content of the drometrizole trisiloxane, when present, is 0.1 to 10% by mass. Aspect 8: The composition according to any one of Aspects 1 to 7, wherein the content of the emulsifier is 0.1 to 7.0% by mass. Aspect 9: A sunscreen cosmetic comprising the composition according to any one of Aspects 1 to 8.

[0011] According to the present invention, it is possible to provide an oil-in-water emulsion cosmetic composition having high ultraviolet absorbing ability.

[0012] 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.

[0013] Oil-in-Water Emulsion Cosmetic Composition The oil-in-water emulsion cosmetic composition of the present invention (hereinafter also simply referred to as "the composition of the present invention") comprises: at least one of polysilicone-15 and drometrizole trisiloxane; terephthalylidene dicamphorsulfonic acid and / or a salt thereof; an emulsifier; an oil component other than polysilicone-15 and drometrizole trisiloxane; and water, wherein the emulsifier comprises at least one selected from the group consisting of PEG-30 phytosteryl, glyceryl stearate, polyoxyethylene hydrogenated castor oil having an HLB value of 14 to 20, PPG-8 ceteth-20, and stearoxyhydroxypropyl methylcellulose.

[0014] As described above, through extensive research by the present inventors, it has been found that the ultraviolet absorption performance of an oil-in-water emulsion cosmetic composition prepared by using either or both of polysilicone-15 and drometrizole trisiloxane in combination with terephthalylidene dicamphorsulfonic acid (and / or a salt thereof) as an ultraviolet absorber may be impaired.

[0015] The present inventors conducted further intensive research into this issue and were able to improve the UV absorption performance of an oil-in-water emulsion cosmetic composition prepared by combining either or both of polysilicone-15 and drometrizole trisiloxane with terephthalylidene dicamphorsulfonic acid (and / or a salt thereof) by incorporating a specific emulsifier.

[0016] Without being limited by theory, the improvement in UV absorption performance of the composition of the present invention due to the specific emulsifier is presumed to be as follows: Since both polysilicone-15 and drometrizole trisiloxane are oil-soluble, they can be present in the oil phase (internal phase) of the composition of the present invention due to the emulsifier. On the other hand, terephthalylidene dicamphorsulfonic acid and its salts can be present in the aqueous phase (external phase) of the composition of the present invention. For this reason, it is presumed that, depending on the type of emulsifier, terephthalylidene dicamphorsulfonic acid or its salt may be affected, resulting in insufficient emulsification of at least one of polysilicone-15 and drometrizole trisiloxane, which may come into contact with water-soluble terephthalylidene dicamphorsulfonic acid or its salt in the aqueous phase, resulting in some kind of interaction that negatively affects the UV absorption performance of the entire composition. In contrast, the use of a specific emulsifier (particularly an emulsifier believed to have excellent salt tolerance (e.g., a nonionic emulsifier)) selected through extensive research by the inventors of the present invention makes it possible to stably emulsify polysilicone-15 and drometrizole trisiloxane in the oil phase, which is believed to result in improved UV absorption performance for the entire composition.

[0017] Each component that may be contained in the composition of the present invention will be described in detail below.

[0018] <Polysilicone-15> The composition of the present invention can contain polysilicone-15, and preferably contains polysilicone-15.

[0019] Polysilicone-15 is a type of oil-soluble ultraviolet absorber that can absorb at least a portion of ultraviolet light in the UVB region. Therefore, it is preferable that the composition of the present invention contains polysilicone-15. Furthermore, as shown in the comparative examples described below, in the case of Comparative Example 4, in which polysilicone-15 and terephthalylidene dicamphorsulfonic acid described below were used in combination, it was found that the ultraviolet absorption ability was lower than in Comparative Example 2, in which terephthalylidene dicamphorsulfonic acid was not blended but polysilicone-15 was blended. However, due to its unique structure, the composition of the present invention can exhibit high ultraviolet absorption ability even when it simultaneously contains polysilicone-15 and terephthalylidene dicamphorsulfonic acid described below.

[0020] Polysilicone-15 is commercially available, for example, Parsol (registered trademark) SLX (manufactured by DSM Corporation).

[0021] When polysilicone-15 is contained in the composition of the present invention, its content is not particularly limited and may be, for example, 0.1% by mass or more, 0.5% by mass or more, 0.8% by mass or more, 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, 5.0% by mass or more, 6.0% by mass or more, 7.0% by mass or more, 8.0% by mass or more, or 9.0% by mass or more, and may be 15% by mass or less, 14% by mass or less, 13% by mass or less, 12% by mass or less, 11% by mass or less, 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, or 5.0% by mass or less, relative to the entire composition.

[0022] Furthermore, when the composition of the present invention contains polysilicone-15, the content of polysilicone-15 relative to 100 parts by mass of the total of terephthalylidene dicamphorsulfonic acid and a salt thereof described below is not particularly limited and may be, for example, 10 parts by mass or more, 30 parts by mass or more, 50 parts by mass or more, 100 parts by mass or more, 500 parts by mass or more, or 1000 parts by mass or more, or may be 5000 parts by mass or less, 4000 parts by mass or less, 3000 parts by mass or less, 2000 parts by mass or less, 1000 parts by mass or less, 500 parts by mass or less, 300 parts by mass or less, or 100 parts by mass or less.

[0023] <Drometrizole Trisiloxane> The composition of the present invention can contain drometrizole trisiloxane. Note that the composition of the present invention contains at least one of drometrizole trisiloxane and the above-mentioned polysilicone-15, and preferably contains both.

[0024] Drometrizole trisiloxane is an oil-soluble UV absorber that can absorb at least a portion of a wide range of UV rays from the UVB region to the UVA region. Therefore, it is preferable that the composition of the present invention contains drometrizole trisiloxane. Furthermore, as shown in the comparative examples described below, in Comparative Example 3, in which drometrizole trisiloxane was used in combination with terephthalylidene dicamphorsulfonic acid (described later), the UV absorption ability was found to be lower than in Comparative Example 1, in which drometrizole trisiloxane was used without terephthalylidene dicamphorsulfonic acid. However, due to its unique structure, the composition of the present invention can exhibit high UV absorption ability even when it simultaneously contains drometrizole trisiloxane and terephthalylidene dicamphorsulfonic acid (described later).

[0025] Drometrizole trisiloxane is commercially available.

[0026] When drometrizole trisiloxane is contained in the composition of the present invention, its content is not particularly limited and may be, for example, 0.1 mass% or more, 0.5 mass% or more, 0.8 mass% or more, 1.0 mass% or more, 2.0 mass% or more, 3.0 mass% or more, 4.0 mass% or more, 5.0 mass% or more, 6.0 mass% or more, 7.0 mass% or more, 8.0 mass% or more, or 9.0 mass% or more, relative to the entire composition, or 10 mass% or less, 9.0 mass% or less, 8.0 mass% or less, 7.0 mass% or less, 6.0 mass% or less, or 5.0 mass% or less.

[0027] Furthermore, when the composition of the present invention contains drometrizole trisiloxane, the content of drometrizole trisiloxane relative to a total of 100 parts by mass of terephthalylidene dicamphorsulfonic acid and its salts described below is not particularly limited, and may be, for example, 10 parts by mass or more, 30 parts by mass or more, 50 parts by mass or more, 100 parts by mass or more, 500 parts by mass or more, or 1000 parts by mass or more, or may be 5000 parts by mass or less, 4000 parts by mass or less, 3000 parts by mass or less, 2000 parts by mass or less, 1000 parts by mass or less, 500 parts by mass or less, 300 parts by mass or less, or 100 parts by mass or less.

[0028] <Terephthalylidene dicamphorsulfonic acid and salts thereof> The composition of the present invention contains terephthalylidene dicamphorsulfonic acid and / or a salt thereof. That is, the composition of the present invention may contain terephthalylidene dicamphorsulfonic acid, a salt of terephthalylidene dicamphorsulfonic acid, or a mixture thereof.

[0029] Terephthalylidene dicamphorsulfonic acid and its salts are each a type of water-soluble ultraviolet absorber, and can absorb at least a portion of ultraviolet light in the UVA region.

[0030] Examples of salts of terephthalylidene dicamphorsulfonic acid include, but are not limited to, inorganic salts such as sodium, potassium, and calcium salts, and organic salts such as triethanolamine, 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, and aminohydroxymethylpropanediol.

[0031] Terephthalylidene dicamphorsulfonic acid is commercially available.

[0032] In the composition of the present invention, the total content of terephthalylidene dicamphorsulfonic acid and its salt is not particularly limited and may be, for example, 0.1 mass% or more, 0.5 mass% or more, 0.8 mass% or more, 1.0 mass% or more, 2.0 mass% or more, 3.0 mass% or more, 4.0 mass% or more, 5.0 mass% or more, 6.0 mass% or more, 7.0 mass% or more, 8.0 mass% or more, or 9.0 mass% or more, relative to the total mass of the composition. It should be noted that the "total content of terephthalylidene dicamphorsulfonic acid and its salt" also includes the case where either terephthalylidene dicamphorsulfonic acid or its salt is not contained (i.e., the case where the content of either one is 0 mass%).

[0033] <Emulsifier> The composition of the present invention contains at least one emulsifier, which is capable of emulsifying the oil phase components of the present invention.

[0034] In the composition of the present invention, the emulsifier comprises at least one selected from the group consisting of PEG-30 phytosteryl, glyceryl stearate, polyoxyethylene hydrogenated castor oil having an HLB value of 14 to 20, PPG-8 ceteth-20, and stearoxyhydroxypropyl methylcellulose.

[0035] In the composition of the present invention, the content of the emulsifier (when a plurality of emulsifiers are blended, the total content thereof) is not particularly limited, and may be, for example, 0.1 mass% or more, 0.2 mass% or more, 0.3 mass% or more, 0.4 mass% or more, 0.5 mass% or more, 0.6 mass% or more, 0.7 mass% or more, 0.8 mass% or more, 0.9 mass% or more, 1.0 mass% or more, 1.1 mass% or more, 1.2 mass% or more, 1.3 mass% or more, 1.4 mass% or more, or 1.5 mass% or more, relative to the entire composition, or may be 10 mass% or less, 9.0 mass% or less, 8.0 mass% or less, 7.0 mass% or less, 6.0 mass% or less, 5.0 mass% or less, 4.0 mass% or less, 3.0 mass% or less, 2.0 mass% or less, 1.0 mass% or less, or 0.8 mass% or less.

[0036] PEG-30 phytosteryl (also called "polyoxyethylene phytosterol") is a mixture of ethers obtained by ether-bonding ethylene oxide (approximately 30 moles) to phytosterols, and is a type of nonionic surfactant classified as an ethylene oxide condensed polyoxyethylene steryl ether.

[0037] In the present invention, PEG-30 phytosteryl can be obtained from commercially available products. Furthermore, commercially available PEG-30 phytosteryl products may contain other components, such as ceramide NP, oryzanol, and stearic acid, to the extent that the effects of the present invention are not impaired. Examples of commercially available products include NIKKOL BPS-30 (manufactured by Nippon Surfactant Industry Co., Ltd.).

[0038] Glyceryl stearate is a monoester formed by dehydration condensation of the carboxyl group of stearic acid with the hydroxyl group of glycerin, and is a type of nonionic surfactant classified as a polyhydric alcohol ester type glycerin fatty acid ester.

[0039] In the present invention, glyceryl stearate can be obtained from commercially available products, such as Sansten 18GKV (Taiyo Kagaku Co., Ltd.).

[0040] Polyoxyethylene hydrogenated castor oil is a type of nonionic surfactant obtained by etherifying hydrogenated castor oil with a polyoxyethylene compound. Polyoxyethylene hydrogenated castor oil can also be described as "POE hydrogenated castor oil" or "POE hydrogenated castor oil."

[0041] In the present invention, the HLB value of the polyoxyethylene hydrogenated castor oil used as an emulsifier may be 14 or more, 15 or more, or 16 or more, and may be 20 or less, 19 or less, 18 or less, 17 or less, 16 or less, or 15 or less.

[0042] In the present invention, the HLB (Hydrophile-Lipophile Balance) value can be defined by the Griffin method.

[0043] In the present invention, polyoxyethylene hydrogenated castor oil having an HLB value of 14 to 20 can be obtained from commercially available products, such as PEG-60 hydrogenated castor oil (HLB value: 14, manufactured by Nippon Surfactant Industry Co., Ltd.) and PEG-100 hydrogenated castor oil (HLB value: 16.5, manufactured by Nippon Surfactant Industry Co., Ltd.), but is not limited to these.

[0044] PPG-8 Ceteth-20 is an ether obtained by ether-bonding cetanol with ethylene oxide (approximately 20 moles) and propylene oxide (approximately 8 moles), and is a type of nonionic surfactant classified as an ethylene oxide condensed polyoxyethylene polyoxypropylene alkyl ether.

[0045] In the present invention, PPG-8 Ceteth-20 can be obtained from commercially available products, such as, but not limited to, NIKKOL PBC-44 (manufactured by Nippon Surfactant Kogyo Co., Ltd.).

[0046] Stearoxyhydroxypropylmethylcellulose is a type of hydrophobically modified hydroxypropylmethylcellulose (hydrophobized hydroxypropylmethylcellulose) and can be classified as a nonionic surfactant.

[0047] In the present invention, stearoxyhydroxypropyl methylcellulose can be obtained from commercially available products, such as Sangelose 90L (display name: hydrophobized hydroxypropyl methylcellulose; manufactured by Daido Chemical Industry Co., Ltd.), Natrosol Plus 330cs (manufactured by Ashland), and Polysurf 67cs (manufactured by Ashland), but is not limited thereto.

[0048] <Oil> The composition of the present invention contains at least one oil. In the present invention, "oil" refers to oils other than polysilicone-15 and drometrizole trisiloxane that constitute the oil phase. The oil constitutes the internal phase of the composition of the present invention.

[0049] In the composition of the present invention, the content of the oil is not particularly limited and may be, for example, 1.0% by mass or more, 5.0% by mass or more, 10% by mass or more, 15% by mass or more, 20% by mass or more, or 25% by mass or more, relative to the total mass of the composition, and may be 70% by mass or less, 60% by mass or less, 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, or 10% by mass or less. The content of the oil may be adjusted as appropriate, for example, based on the form of a cosmetic containing the composition of the present invention.

[0050] In the composition of the present invention, the oil is not particularly limited and may be, for example, a liquid, solid, or semi-solid oil or a mixture thereof at room temperature (25°C) and atmospheric pressure (1 atm). Furthermore, the oil may be a non-volatile oil, a volatile oil, or a mixture thereof. In the present invention, the term "non-volatile oil" refers to an oil having a boiling point of 260°C or higher under atmospheric pressure. In contrast, the term "volatile oil" refers to an oil having a boiling point of less than 260°C under atmospheric pressure.

[0051] In the present invention, specific examples of oils include, but are not limited to, silicone oils, polar oils, and hydrocarbon oils. However, from the viewpoint of affinity with the silicone skeleton-containing polysilicone-15 and drometrizole trisiloxane described above, it is preferred that the composition of the present invention contain a silicone oil, particularly a volatile silicone oil.

[0052] (Silicone oil) Silicone oil can be selected from volatile and non-volatile linear, branched or cyclic silicone oil.More specifically, silicone oil can be listed, but is not limited to, for example, methylpolysiloxane, methylphenylpolysiloxane, methylpolycyclosiloxane, methylhydrogenpolysiloxane, dimethylsiloxane, dimethylsiloxane-methyl (POE) siloxane copolymer, high polymerized methylpolysiloxane, dimethylsiloxane-methyl (POP) siloxane copolymer, tetradecamethylhexasiloxane, octamethyltrisiloxane, dimethylsiloxane-methyl cetyloxysiloxane copolymer, decamethyltetrasiloxane, cyclopentasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, hexadecamethylcycloheptasiloxane etc.

[0053] (Polar Oil) In the present invention, polar oil refers to an oil with high polarity among oils that can be used in cosmetics, for example, an oil with an IOB value of 0.10 or more. Here, the IOB value is an abbreviation for Inorganic / Organic Balance (inorganic / organic ratio), and is a value that represents the ratio of inorganic value to 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).

[0054] In the present invention, the IOB value of the polar oil can be, for example, 0.10 or more, 0.11 or more, 0.12 or more, or 0.13 or more, and can be 1.50 or less, 1.00 or less, 0.50 or less, 0.45 or less, or 0.40 or less.

[0055] Specific examples of polar oils include isopropyl myristate (IOB value = 0.18), octyl palmitate (IOB value = 0.13), isopropyl palmitate (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), isononyl isononanoate (IOB value = 0.20), and isotridecyl isononanoate (IOB value = 0.11). = 0.15), cetyl ethylhexanoate (IOB value = 0.13), pentaerythrityl tetraethylhexanoate (IOB value = 0.35), diethylhexyl succinate (IOB value = 0.32), dioctyl succinate (IOB value = 0.36), 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), triisostearate Trimethylolpropane stearate (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-glutamic acid-2-octyldodecyl ester (IOB value = 0.29), 2-hexyldecyl adipate (IOB value=0.16), diisopropyl sebacate (IOB value=0.40), 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), alkyl (C12-15) benzoate (IOB value=0.18), caprylic / capric triglyceride (IOB value=0.33), and the like, but are not limited thereto.

[0056] In addition to the above, polar oils having an ultraviolet absorbing function with an IOB value of 0.10 or more may also be used. Examples of such polar oils include, but are not limited to, butyloctyl salicylate, phenethyl benzoate, octyl methoxycinnamate (ethylhexyl methoxycinnamate), octocrylene, t-butylmethoxydibenzoylmethane, ethylhexyl triazone, bisethylhexyloxyphenol methoxyphenyl triazine, diethylaminohydroxybenzoylhexyl benzoate, oxybenzone-3, methylenebisbenzotriazolyltetramethylbutylphenol, homosalate, and ethylhexyl salicylate.

[0057] (Hydrocarbon Oil) In the present invention, the hydrocarbon oil may be a volatile hydrocarbon oil or a non-volatile hydrocarbon oil.

[0058] Specific examples of hydrocarbon oils include, but are not limited to, decane, dodecane, isododecane, isohexadecane, liquid paraffin, hydrogenated polydecene, hydrogenated didecene, squalane, squalene, and paraffin.

[0059] <Water> The composition of the present invention comprises water, which constitutes the external phase of the composition of the present invention.

[0060] The water content of the composition of the present invention is not particularly limited and may be, for example, 30% by mass or more, 40% by mass or more, 50% by mass or more, 60% by mass or more, or 70% by mass or more, relative to the total mass of the composition, and may be 90% by mass or less, 80% by mass or less, 70% by mass or less, or 60% by mass or less. The water content may be adjusted appropriately based on, for example, the form of a cosmetic containing the composition of the present invention.

[0061] <Other Components> The composition of the present invention may further contain other components in addition to those described above. The other components will be described below by way of example, but the present invention is not limited to these examples.

[0062] (Hydrophilic Thickener) The composition of the present invention may further contain at least one hydrophilic thickener. The hydrophilic thickener refers to a thickener that has a hydrophilic group and can increase the viscosity of a liquid containing water. The hydrophilic thickener may have an emulsifying function similar to the above-mentioned emulsifier.

[0063] In the present invention, the hydrophilic thickener is not particularly limited, and examples thereof include, but are not limited to, acrylic thickeners, polysaccharide thickeners, etc. Among these, from the viewpoint of further exerting the effects of the present invention, it is preferable that the hydrophilic thickener contains an acrylic thickener.

[0064] In the present invention, the acrylic thickener refers to a hydrophilic thickener having an acrylic acid backbone. As the acrylic thickener, particularly an acrylic polymer and a vinyl polymer are preferred. More specifically, examples of the acrylic thickener include, but are not limited to, (acrylates / C10-30 alkyl acrylate) crosspolymer, (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (dimethylacrylamide / sodium acryloyldimethyltaurate) crosspolymer, and carbomer.

[0065] In the present invention, examples of polysaccharide thickeners include, but are not limited to, naturally occurring polysaccharide thickeners, microbial polysaccharide thickeners, nonionic cellulose derivatives, anionic cellulose, cationized cellulose, and cationized guar gum. Examples of naturally occurring polysaccharide thickeners include, but are not limited to, alginic acid, carrageenan, agar, furcella, guar gum, quince seed, konjac mannan, tamarind seed gum, tara gum, dextrin, starch, locust bean gum, gum arabic, ghatti gum, karaya gum, tragacanth gum, arabinogalactan, pectin, quince, chitosan, and hyaluronic acid. Examples of microbial polysaccharide thickeners include, but are not limited to, curdlan, xanthan gum, gellan gum, cyclodextrin, dextran, pullulan, chitosan, and hyaluronic acid. Examples of nonionic cellulose derivatives include, but are not limited to, microcrystalline cellulose, methyl cellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylmethyl cellulose, etc. Examples of anionic celluloses include, but are not limited to, carboxymethyl cellulose, etc. Examples of cationized celluloses include, but are not limited to, O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethyl cellulose chloride, etc. Examples of cationized guar gums include, but are not limited to, O-[2-hydroxy-3-(trimethylammonio)propyl]guar gum chloride, etc.

[0066] When the composition of the present invention contains a hydrophilic thickener, its content is not particularly limited and may be, for example, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, or 1.5% by mass or more, relative to the entire composition, and may be 10% by mass or less, 5.0% by mass or less, 3.0% by mass or less, or 2.0% by mass or less.

[0067] (Oil Phase Thickener) The composition of the present invention may further contain an oil phase thickener. By including an oil phase thickener, for example, the oil component can be thickened and / or gelled. The oil phase thickener may also function as an emulsifier aid.

[0068] The oil phase thickener is not particularly limited, and one or more selected from the group consisting of disteardimonium hectorite, dimethyl distearyl ammonium hectorite, benzyl dimethyl stearyl ammonium hectorite, distearyl dimethyl ammonium chloride-treated magnesium aluminum silicate, dextrin palmitate, dextrin oleate, dextrin stearate, dextrin myristate, dextrin (palmitate / ethylhexanoate), dextrin (palmitate / hexyldecanoate), inulin stearate, dibutyl lauroyl glutamide, sucrose tetrastearate triacetate, and dibutyl ethylhexanoyl glutamide may be used.

[0069] When an oil phase thickener is contained in the composition of the present invention, its content is not particularly limited and may be, for example, 0.05 mass% or more, 0.1 mass% or more, 0.2 mass% or more, 0.3 mass% or more, 0.4 mass% or more, 0.5 mass% or more, 0.6 mass% or more, 0.7 mass% or more, 0.8 mass% or more, 0.9 mass% or more, or 1.0 mass% or more, relative to the entire composition, and may be 6.0 mass% or less, 5.0 mass% or less, 4.0 mass% or less, 3.0 mass% or less, 2.0 mass% or less, or 1.0 mass% or less.

[0070] The composition of the present invention may further contain a moisturizer. Examples of moisturizers include, but are not limited to, glycerin, dipropylene glycol, trehalose, butylene glycol, trimethylglycine, glucose, sorbitol, maltitol, and PEG / PPG-14 / 7 dimethyl ether.

[0071] When the composition of the present invention contains a humectant, the content thereof is not particularly limited and may be, for example, 0.5% by mass or more, 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, 4.0% by mass or more, 5.0% by mass or more, 6.0% by mass or more, 7.0% by mass or more, 8.0% by mass or more, or 9.0% by mass or more, relative to the entire composition, and may be 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 15% by mass or less, 12% by mass or less, or 10% by mass or less.

[0072] (Surfactant) The composition of the present invention may further contain at least one surfactant (provided that it is other than the above-mentioned "emulsifier").

[0073] The surfactant is not particularly limited, and for example, a nonionic surfactant, an anionic surfactant, a cationic surfactant, or an amphoteric surfactant can be used. Of these, it is particularly preferred that the composition of the present invention contains a nonionic surfactant. Examples of nonionic surfactants include, but are not limited to, sucrose fatty acid esters, polyethylene glycol hydrogenated castor oil, and polyglycol esters.

[0074] When the composition of the present invention contains a surfactant, its content is not particularly limited and may be, for example, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, or 1.0% by mass or more, and may be 10% by mass or less, 5.0% by mass or less, 3.0% by mass or less, or 1.0% by mass or less, relative to the entire composition.

[0075] Drugs The compositions of the present invention may further comprise at least one drug.

[0076] Examples of the drug include cosmetic drugs having at least one effect selected from the group consisting of whitening effect, anti-wrinkle effect, anti-blemish effect, pore suppressing or astringent effect, moisturizing effect, and keratin softening effect. Furthermore, water-soluble cosmetic drugs are preferred.

[0077] More specifically, examples of the agent include, but are not limited to, acetylated sodium hyaluronate, hyaluronic acid, taurine, glycylglycine, tranexamic acid, potassium methoxysalicylate ("potassium methoxysalicylate"), vitamin C, magnesium ascorbyl phosphate, ascorbic acid glucoside, arbutin, kojic acid, rucinol, ellagic acid, alkoxysalicylic acid, and linoleic acid.

[0078] When the composition of the present invention contains a drug, the content thereof is not particularly limited, and may be, for example, 0.00001% by mass or more, 0.0001% by mass or more, 0.001% by mass or more, 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, or 2.0% by mass or more, relative to the entire composition, and may be 20% by mass or less, 10% by mass or less, 5.0% by mass or less, 3.0% by mass or less, or 1.0% by mass or less.

[0079] (Optionally Added Components) In addition to the above, the composition of the present invention may contain other optional components commonly used in cosmetics, such as, but not limited to, dispersants, lower alcohols, film-forming agents, neutralizing agents, preservatives, chelating agents, stabilizers, sequestering agents, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant aids, fragrances, and the like, as needed.

[0080] <Uses> The composition of the present invention can be suitably used as a cosmetic or a raw material thereof. Furthermore, since the composition of the present invention has a high ultraviolet absorbing effect, it can be suitably used particularly as a sunscreen cosmetic, makeup base, concealer, or foundation, or a raw material thereof. In one embodiment of the present invention, the composition of the present invention may be a sunscreen cosmetic.

[0081] The formulation of the cosmetic according to the present invention is not particularly limited, and may be, for example, a liquid, gel, emulsion, cream, solid, or balm.

[0082] Furthermore, the cosmetic composition according to the present invention may be a two-layer type that is shaken and / or mixed when used, or may be a type that is used as is.

[0083] <Production Method> The composition of the present invention or the cosmetic of the present invention is not particularly limited and can be produced by a conventional method.

[0084] For example, an aqueous phase part is prepared by mixing water, terephthalylidene dicamphorsulfonic acid and / or a salt thereof, and optionally an aqueous additive, and an oil phase part is prepared by mixing an oil, at least one of polysilicone-15 and drometrizole trisiloxane, and an oily additive. Next, when obtaining an oil-in-water emulsion cosmetic composition, the oil phase part may be added to the aqueous phase part, and emulsified by a conventional method to prepare the oil-in-water composition or cosmetic of the present invention.

[0085] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these. Unless otherwise specified, the blending amounts are expressed in mass %.

[0086] Examples 1 to 3 and Comparative Examples 1 to 5 Based on the formulations in Table 1, oil-in-water emulsion cosmetic compositions (milky liquids) of Examples 1 to 3 and Comparative Examples 1 to 5 were prepared.

[0087] (Evaluation of UV absorption ability) Each of the prepared compositions was applied to a PMMA plate of artificial skin, i.e., a PMMA plate having irregularities corresponding to skin grooves (SPF MASTER (registered trademark) PA01, manufactured by Shiseido Co., Ltd.) at a concentration of 2 mg / cm. ２ The composition was uniformly applied in an amount of 100 ml and left to dry for 15 minutes. The integrated absorbance values ​​of each sample composition were then measured using a spectrophotometer (U-3500 self-recording spectrophotometer, manufactured by Hitachi, Ltd.) in the wavelength ranges of 321 to 400 nm (UVA region) and 280 to 320 nm (UVB region). The results are shown in Table 1.

[0088] Then, for the obtained integrated ultraviolet absorbance values ​​of each composition, the integrated ultraviolet absorbance values ​​for each of the UVA region and UVB region of Comparative Example 1 were used as a reference to determine the rate of increase or decrease in the ultraviolet absorption ability in each of the UVA region and UVB region of Examples 1 to 3 and Comparative Examples 2 to 5 relative to Comparative Example 1. Note that the integrated ultraviolet absorbance values ​​for each of the UVA region and UVB region of Comparative Example 2 were used as a reference to determine the rate of increase or decrease in the ultraviolet absorption ability in each of the UVA region and UVB region of Comparative Example 4 relative to Comparative Example 2.

[0089] For example, the ultraviolet absorption capacity in the UVA region of Example 1 was calculated using the formula "increase ratio of ultraviolet absorption capacity in the UVA region of Example 1 = integrated absorbance value in the UVA region of Example 1 / integrated absorbance value in the UVA region of Comparative Example 1." Furthermore, for example, the ultraviolet absorption capacity in the UVA region of Comparative Example 2 was calculated using the formula "decrease ratio of ultraviolet absorption capacity in the UVA region of Comparative Example 2 = integrated absorbance value in the UVA region of Comparative Example 2 / integrated absorbance value in the UVA region of Comparative Example 1."

[0090] The ultraviolet absorption capacity in the UVA region of Comparative Example 4 was calculated using the formula "reduction ratio of ultraviolet absorption capacity in the UVA region of Comparative Example 4 = integrated absorbance value in the UVA region of Comparative Example 4 / integrated absorbance value in the UVA region of Comparative Example 2."

[0091] The results of the ultraviolet absorbing ability of each sample are shown in Table 1.

[0092]

[0093] The details of "Other Component A," "Other Component B," and "Other Component C" in Table 1 are shown in Table 2 below:

[0094] As is clear from the results in Table 1, compared to Comparative Example 1, the compositions of Examples 1 to 3 had significantly higher integrated ultraviolet absorbance values ​​in both the UVA and UVB regions, suggesting that they had significantly higher ultraviolet absorption capabilities.

[0095] On the other hand, it was found that the compositions of Comparative Examples 2, 3 and 5 had reduced ultraviolet absorption capabilities in both the UVA and UVB regions compared to Comparative Example 1.

[0096] It was also found that the composition of Comparative Example 4 had a reduced ultraviolet absorbing ability in both the UVA and UVB regions compared to Comparative Example 2.

[0097] Examples 4 to 6 and Comparative Examples 6 to 7 Oil-in-water emulsion cosmetic compositions (milky liquids) of Examples 4 to 6 and Comparative Examples 6 and 7 were prepared based on the formulations in Table 3. The UV absorption ability was evaluated in the same manner as above, and the results are shown in Table 3.

[0098] The evaluation standard for the ultraviolet absorbing ability of the compositions of Examples 4 and 5 was Comparative Example 6, and the evaluation standard for the ultraviolet absorbing ability of Example 6 was Comparative Example 7.

[0099] The details of "Other Component A," "Other Component B," and "Other Component C" in Table 3 were the same as those in Table 1 (and Table 2), respectively.

[0100]

[0101] As is clear from the results in Table 3, compared to Comparative Example 6, the compositions of Examples 4 and 5 had significantly higher integrated ultraviolet absorbance values ​​in both the UVA and UVB regions, suggesting that they have significantly higher ultraviolet absorption capabilities.

[0102] Furthermore, compared to Comparative Example 7, the composition of Example 6 exhibited significantly higher integrated ultraviolet absorbance values ​​in both the UVA and UVB regions, suggesting that it has significantly higher ultraviolet absorption capabilities.

[0103] Examples 7 to 11 and Comparative Examples 8 to 11 Oil-in-water emulsion cosmetic compositions (milky liquids) of Examples 7 to 11 and Comparative Examples 8 to 11 were prepared based on the formulations in Table 4. The UV absorption ability was evaluated in the same manner as above, and the results are shown in Table 4.

[0104] The evaluation criteria for the ultraviolet absorbing ability of each composition were as follows: Evaluation criteria for Example 7: Comparative Example 8 Evaluation criteria for Example 8: Comparative Example 9 Evaluation criteria for Examples 9 and 10: Comparative Example 10 Evaluation criteria for Example 11: Comparative Example 11

[0105] The details of "Other Component A," "Other Component B," and "Other Component C" in Table 4 were the same as those in Table 1 (and Table 2), respectively.

[0106]

[0107] As is clear from the results in Table 4, compared to Comparative Example 8, the composition of Example 7 obtained significantly higher integrated ultraviolet absorbance values ​​in both the UVA and UVB regions, suggesting that it has significantly higher ultraviolet absorption ability.

[0108] Furthermore, compared to Comparative Example 9, the composition of Example 8 exhibited significantly higher integrated ultraviolet absorbance values ​​in both the UVA and UVB regions, suggesting that it has significantly higher ultraviolet absorption capabilities.

[0109] Furthermore, compared to Comparative Example 10, the compositions of Examples 9 and 10 exhibited significantly higher integrated ultraviolet absorbance values ​​in both the UVA and UVB regions, suggesting that they have significantly higher ultraviolet absorption capabilities.

[0110] Furthermore, compared to Comparative Example 11, the composition of Example 11 exhibited significantly higher integrated ultraviolet absorbance values ​​in both the UVA and UVB regions, suggesting that it has significantly higher ultraviolet absorption capacity.

Claims

1. An oil-in-water emulsion cosmetic composition comprising: at least one of polysilicone-15 and drometrizole trisiloxane; terephthalylidene dicamphorsulfonic acid and / or a salt thereof; an emulsifier; an oil component other than said polysilicone-15 and said drometrizole trisiloxane; and water, wherein said emulsifier comprises at least one selected from the group consisting of PEG-30 phytosteryl, glyceryl stearate, polyoxyethylene hydrogenated castor oil having an HLB value of 14 to 20, PPG-8 ceteth-20, and stearoxyhydroxypropyl methylcellulose.

2. The composition of claim 1, further comprising a hydrophilic thickener.

3. The composition of claim 2, wherein the hydrophilic thickener comprises an acrylic thickener.

4. The composition of any one of claims 1 to 3, comprising both said polysilicone-15 and said drometrizole trisiloxane.

5. The composition according to any one of claims 1 to 4, wherein the total content of terephthalylidene dicamphorsulfonic acid and its salts is 0.1 to 10% by mass.

6. The composition according to any one of claims 1 to 5, wherein the content of polysilicone-15, when present, is 0.1 to 15 mass%.

7. The composition according to any one of claims 1 to 6, wherein the content of drometrizole trisiloxane, when present, is 0.1 to 10 mass%.

8. The composition according to any one of claims 1 to 7, wherein the content of the emulsifier is 0.1 to 7.0% by mass.

9. A sunscreen cosmetic comprising the composition according to any one of claims 1 to 8.

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