Transparent gel cosmetics

Abstract

To provide a transparent gelatinous cosmetic that has excellent stability in both transparency and hardness over time.SOLUTION: A transparent gelatinous cosmetic contains ceramide, at least one polysaccharide selected from the group consisting of locust bean gum, guar gum, and tara gum, at least one nonionic surfactant selected from the group consisting of polyoxyethylene alkyl ether, polyglyceryl fatty acid ester, and polyoxyethylene sorbitan fatty acid ester, xanthan gum, and water.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present disclosure relates to a transparent gel cosmetic preparation. [Background technology]

[0002] In recent years, there has been an increasing demand for gel-type cosmetic preparations, which have properties known as "gels," for the purpose of improving the feel of use when applied to the skin. Polysaccharides, for example, are used to obtain gel-type cosmetic preparations. By combining specific polysaccharides, it is possible to form a transparent, elastic, and soft gel.

[0003] Patent Document 1 describes an O / W emulsion composition containing (A) ceramides, (B) a nonionic surfactant, (C) shea butter, and (D) water, as well as a polysaccharide. Patent Document 2 describes a gel composition containing (A) agar, (B) xanthan gum, (C) locust bean gum, and (D) water. Patent Document 3 describes a cosmetic containing locust bean gum and further containing a polyoxyalkylene polyhydric alcohol ether. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-178860 [Patent Document 2] Japanese Patent Application Laid-Open No. 2013-139423 [Patent Document 3] Japanese Patent Application Publication No. 2019-112352 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, ceramides are sometimes blended into cosmetics in the hope of taking advantage of the skin care effects that ceramides provide. When ceramide is blended into a transparent gel cosmetic composition formed by combining polysaccharides, there are problems such as the loss of transparency over time due to ceramide precipitation, and the loss of hardness stability due to accelerated gelation.

[0006] The problem to be solved by one embodiment of the present invention is to provide a transparent gel cosmetic preparation that has excellent stability over time in transparency and hardness. [Means for solving the problem]

[0007] The present disclosure includes the following embodiments. <1> Ceramide and At least one polysaccharide selected from the group consisting of locust bean gum, guar gum, and tara gum; at least one nonionic surfactant selected from the group consisting of polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, and polyoxyethylene sorbitan fatty acid esters; Xanthan gum and Water and A transparent gel cosmetic comprising:

[0008] <2> The polysaccharide is locust bean gum. <1> The transparent gel cosmetic composition according to claim 1 <3> The nonionic surfactant is a polyglycerol fatty acid ester. <1> or <2> The transparent gel cosmetic preparation according to claim 1. <4> At least one thickener selected from the group consisting of (acrylates / C10-30 alkyl acrylate) crosspolymers and carboxyvinyl polymers, <1> ~ <3> 10. The transparent gel cosmetic preparation according to claim 9, wherein the transparent gel cosmetic preparation is a cosmetic preparation containing a hydroxybenzoate.

[0009] <5> the content of the thickener is 0.010% by mass to 0.30% by mass relative to the total mass of the transparent gel cosmetic; <4> The transparent gel cosmetic preparation according to claim 1. <6> The total content of the polysaccharide and the xanthan gum is 0.050% by mass to 0.50% by mass relative to the total mass of the transparent gel cosmetic. <1> ~ <5> 10. The transparent gel cosmetic preparation according to claim 9, wherein the transparent gel cosmetic preparation is a cosmetic preparation containing a hydroxybenzoate. <7> the ratio of the content of the polysaccharide to the total content of the polysaccharide and the xanthan gum is 0.10 to 1.0 by mass; <1> ~ <6> 10. The transparent gel cosmetic preparation according to claim 9, wherein the transparent gel cosmetic preparation is a cosmetic preparation containing a hydroxybenzoate. <8> The content of the locust bean gum is 0.030% by mass to 0.30% by mass relative to the total mass of the transparent gel cosmetic. <2> The transparent gel cosmetic preparation according to claim 1. <9> The content of the ceramide is 0.0010% by mass to 1.0% by mass relative to the total mass of the transparent gel cosmetic. <1> ~ <8> 10. The transparent gel cosmetic preparation according to claim 9, wherein the transparent gel cosmetic preparation is a cosmetic preparation containing a hydroxybenzoate. <10> including cyclohexanedicarboxylic acid bisethoxydiglycol ester, <1> ~ <9> 10. The transparent gel cosmetic preparation according to claim 9, wherein the transparent gel cosmetic preparation is a cosmetic preparation containing a hydroxybenzoate. <11> including polyoxyalkylene polyhydric alcohol ethers, <1> ~ <10> 10. The transparent gel cosmetic preparation according to claim 9, wherein the transparent gel cosmetic preparation is a cosmetic preparation containing a hydroxybenzoate. [Effects of the Invention]

[0010] According to one embodiment of the present invention, a transparent gel cosmetic preparation is provided that has excellent stability of transparency and hardness over time. DETAILED DESCRIPTION OF THE INVENTION

[0011] An example of an embodiment of a transparent gel cosmetic preparation to which the present invention is applied is described below. However, the transparent gel cosmetic preparation of the present disclosure is not limited to the following embodiment and can be implemented with appropriate modifications within the scope of the object of the present disclosure.

[0012] In the present disclosure, a numerical range indicated using "to" means a range that includes the numerical values ​​before and after "to" as the minimum and maximum values, respectively. In the present disclosure, in the numerical ranges described in stages, the upper or lower limit value described in one numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. Furthermore, in the numerical ranges described in the present disclosure, the upper or lower limit value of the numerical range may be replaced with the value shown in the examples. In the present disclosure, the amount of each component in a transparent gel cosmetic preparation means the total amount of multiple substances present in the transparent gel cosmetic preparation, unless otherwise specified, when multiple substances corresponding to each component are present in the transparent gel cosmetic preparation. In the present disclosure, a combination of two or more preferred embodiments is a more preferred embodiment. In the present disclosure, "parts by mass" may be synonymous with "% by mass."

[0013] In the present disclosure, the term "transparent" in relation to a transparent gel cosmetic preparation means that the absorbance at a wavelength of 625 nm measured using a spectrophotometer and a cell with an optical path length of 1 cm is 0.15 or less. The absorbance is measured as follows. First, 100 g of the object to be measured is placed in a glass container with a diameter of 47 mm and a height of 90 mm, and stored with the cap on at 25°C for 24 hours. Next, the measurement object is stored at room temperature for 24 hours and then subjected to a degassing treatment. The degassing treatment is not particularly limited, and examples thereof include centrifugal degassing treatment, vacuum degassing treatment, and vacuum centrifugal degassing treatment. For example, the sample is placed in a polystyrene disposable cell with an optical path length of 1 cm, and the cell is centrifuged at 4000 rpm (revolutions per minute) for 2 minutes using a small refrigerated centrifuge to degas the sample. After the degassing treatment, the absorbance of the measurement object to light with a wavelength of 625 nm is measured using a spectrophotometer. The small refrigerated centrifuge is not particularly limited, but for example, the CF5RX manufactured by Hitachi Koki Co., Ltd. can be suitably used. The spectrophotometer is not particularly limited, but for example, U-2550 manufactured by Shimadzu Corporation can be suitably used.

[0014] In the present disclosure, the term "gel-like" in relation to a transparent gel cosmetic preparation refers to a state in which the preparation does not exhibit fluidity and retains its shape when no stress is applied at 25°C, and specifically, this is determined using hardness as an indicator. That is, in the present disclosure, the term "gel-like" in relation to a transparent gel-like cosmetic preparation refers to a state in which 50 g of the measurement object is placed in a sealed glass container with a diameter of 40 mm and a height of 75 mm, and after storing at 25°C for 24 hours, the hardness at 25°C measured using a hardness tester is 5 g or more. The hardness tester is not particularly limited, but for example, a rheometer (model name: FUDOH REHOMETER) manufactured by Rheotech Co., Ltd. can be suitably used. In the present disclosure, transparent gel cosmetic preparations include quasi-drugs (for example, medicated cosmetics) and cosmetics.

[0015] In the present disclosure, the terms "breakdown feeling" and "skin compatibility" may be used to describe the feel of a transparent gel cosmetic when used. In the present disclosure, "feeling of disintegration" is expressed as the degree of change in shape (i.e., disintegration) from the shape of the transparent gel cosmetic when placed in the hand to the time when the transparent gel cosmetic is disintegrated on the skin due to the application action during use. The greater the degree of this change in shape, the better the feeling of disintegration of the transparent gel cosmetic. On the other hand, if the cosmetic is in liquid form, the above-mentioned change in shape does not (or is unlikely to) occur, and therefore the feeling of disintegration can be determined to be poor. Furthermore, "good skin compatibility" means that when a transparent gel cosmetic composition is spread on the skin during application, it changes to a liquid state and quickly blends into the skin. On the other hand, if a transparent gel cosmetic composition changes to a liquid state when spread on the skin during application, but the liquid continues to slide smoothly over the skin and takes a long time to blend into the skin, it cannot be said to have good skin compatibility.

[0016] In the present disclosure, the term "process" refers not only to an independent process, but also to a process that cannot be clearly distinguished from other processes, as long as the intended purpose of the process is achieved.

[0017] <Transparent gel cosmetic> The transparent gel cosmetic preparation of the present disclosure contains ceramide, at least one polysaccharide selected from the group consisting of locust bean gum, guar gum, and tara gum (hereinafter also referred to as the "specific polysaccharide"), at least one nonionic surfactant selected from the group consisting of polyoxyethylene alkyl ether, polyglycerin fatty acid ester, and polyoxyethylene sorbitan fatty acid ester (hereinafter also referred to as the "specific nonionic surfactant"), xanthan gum, and water.

[0018] As mentioned above, when ceramide is blended into a transparent gel cosmetic composition formed by combining polysaccharides, there are problems such as the loss of transparency over time due to ceramide precipitation, and the loss of hardness stability due to accelerated gelation. The present inventors have conducted extensive research into the above-mentioned problems and have discovered that a transparent gel cosmetic preparation that exhibits excellent stability over time in both transparency and hardness can be obtained by combining and blending ceramide, a specific polysaccharide, xanthan gum, a specific nonionic surfactant, and water.

[0019] However, none of Patent Documents 1 to 3 discloses a transparent gel-like composition that contains all of ceramide, a specific polysaccharide, a specific nonionic surfactant, xanthan gum, and water. Furthermore, the compositions described in Patent Documents 1 to 3 do not achieve stability over time in transparency and hardness.

[0020] Each component of the transparent gel cosmetic preparation of the present disclosure will be described in detail below.

[0021] [(A) Ceramide] The transparent gel cosmetic preparation of the present disclosure contains ceramide. The ceramide is preferably a natural ceramide. In the present disclosure, "natural ceramide" refers to a ceramide having the same structure as the ceramide present in the stratum corneum of human skin (so-called human ceramide).

[0022] Ceramides having a general structure called natural ceramides may be natural products (extracts), ceramides obtained by microbial fermentation, ceramides derived from animals, or synthetic products. The ceramide may be an optically active natural form (D(-) form), an optically active non-natural form (L(+) form), or a mixture of an optically active natural form and an optically active non-natural form. The relative configuration of the ceramide may be a natural configuration, a non-natural configuration, or a configuration resulting from a mixture of the natural and non-natural configurations.

[0023] Specific examples of natural ceramides include ceramide EOP (ceramide 1), ceramide NS (ceramide 2), ceramide NP (ceramide 3), ceramide EOH (ceramide 4), ceramide AS (ceramide 5), ceramide AP (ceramide 6), ceramide AH (ceramide 7), ceramide NH (ceramide 8), ceramide EOS (ceramide 9), etc. Among these, at least one selected from the group consisting of ceramide EOP, ceramide NP, and ceramide AP is preferred.

[0024] Natural ceramides are also available as commercial products. Examples of commercially available natural ceramides include Ceramide I, Ceramide EOP27, Ceramide EOS27, Ceramide III, Ceramide IIIA, Ceramide IIIB, Ceramide IIIC, Ceramide VI (all trade names, Evonik), Ceramide TIC-001 (trade name, Takasago International Corporation), CERAMIDE II (trade name, Quest International), DS-Ceramide VI, DS-CLA-Phytoceramide, C6-Phytoceramide, DS-ceramide Y3S (all trade names, DOOSAN), and CERAMIDE 2 (trade name, Sederma).

[0025] The transparent gel cosmetic preparation of the present disclosure may contain only one type of ceramide, or may contain two or more types of ceramide.

[0026] The ceramide content in the transparent gel cosmetic preparation of the present disclosure is preferably 0.0010% by mass to 1.0% by mass, more preferably 0.0010% by mass to 0.5% by mass, and even more preferably 0.0050% by mass to 0.1% by mass, relative to the total amount of the transparent gel cosmetic preparation. When the ceramide content is 0.0010% by mass or more relative to the total mass of the transparent gel cosmetic preparation, the desired effects of incorporating ceramide, such as moisturizing effect, are more likely to be achieved. Furthermore, if the ceramide content is 1.0% by mass or less relative to the total mass of the transparent gel cosmetic preparation, the stability of transparency over time can be improved.

[0027] [(B) At least one polysaccharide selected from the group consisting of locust bean gum, guar gum, and tara gum] The transparent gel cosmetic preparation of the present disclosure contains at least one polysaccharide (specific polysaccharide) selected from the group consisting of locust bean gum, guar gum, and tara gum. In the transparent gel cosmetic preparation of the present disclosure, the specific polysaccharide contributes to gelation. The specific polysaccharides are included in galactomannans, which have a main chain composed of mannose and a side chain composed of galactose.

[0028] From the viewpoint of excellent gelling ability and the transparency of the transparent gel cosmetic preparation, the specific polysaccharide is preferably locust bean gum. In particular, from the viewpoint of obtaining a transparent gel cosmetic preparation with excellent transparency, it is preferable to use locust bean gum as the specific polysaccharide.

[0029] The specific polysaccharides are available as commercial products. Examples of commercially available locust bean gum products include Neosoft L-16 (Taiyo Kagaku Co., Ltd.), Maypro LBG Frere M-200 (Sansho Co., Ltd.), GENUGUM RL-200-J (Sansho Co., Ltd.), GENUGUM RL-200-Z (Sansho Co., Ltd.), Locust Bean Gum CS (Ina Food Industry Co., Ltd.), and Nomcoat CG (Nisshin Oillio Group, Ltd.). GENUGUM RL-200-J is a mixture of 70% by mass of locust bean gum and 30% by mass of sucrose, and NOMCORT CG is a mixture of 50% by mass of locust bean gum and 50% by mass of xanthan gum. Examples of commercially available guar gum products include SUPERGEL CSA 200 / 50 (Sansho Co., Ltd.) and SUPERGEL 40 (Sansho Co., Ltd.). Examples of commercially available tara gum products include Spinogum (Fuso Chemical Co., Ltd.) and MT120 (Mitsubishi Chemical Foods Corporation).

[0030] The transparent gel cosmetic preparation of the present disclosure may contain only one type of specific polysaccharide, or may contain two or more types.

[0031] The content of the specific polysaccharide in the transparent gel cosmetic preparation of the present disclosure is preferably 0.010% by mass to 0.40% by mass, more preferably 0.030% by mass to 0.30% by mass, and even more preferably 0.050% by mass to 0.20% by mass, relative to the total mass of the transparent gel cosmetic preparation. When the content of the specific polysaccharide is 0.010% by mass or more relative to the total mass of the transparent gel cosmetic preparation, the preparation tends to form a gel state more easily and also tends to have a better feel when used (particularly, a good feeling of crumbling). Furthermore, when the content of the specific polysaccharide is 0.40% by mass or less relative to the total mass of the transparent gel cosmetic preparation, the feel during use (particularly, compatibility with the skin) tends to be good. When the specific polysaccharide is locust bean gum, the content of locust bean gum is preferably 0.030% by mass to 0.30% by mass, and more preferably 0.050% by mass to 0.20% by mass, relative to the total mass of the transparent gel cosmetic, for the same reasons as above.

[0032] [(C) At least one nonionic surfactant selected from the group consisting of polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, and polyoxyethylene sorbitan fatty acid esters] The transparent gel cosmetic preparation of the present disclosure contains at least one nonionic surfactant (specific nonionic surfactant) selected from the group consisting of polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, and polyoxyethylene sorbitan fatty acid esters. In the transparent gel cosmetic preparation of the present disclosure, the specific nonionic surfactant contributes to stabilizing transparency and hardness over time. In particular, from the viewpoints of stabilizing transparency and hardness over time, it is preferable that the specific nonionic surfactant be a polyglycerin fatty acid ester.

[0033] -Polyoxyethylene alkyl ether- The term polyoxyethylene alkyl ether is used as a general term for ethylene oxide adducts of higher fatty acid alcohols. The aliphatic hydrocarbon group derived from a higher fatty acid alcohol contained in the polyoxyethylene alkyl ether is preferably an alkyl group or an alkenyl group. The alkyl group or alkenyl group is preferably a straight chain or branched chain, and more preferably a straight chain. The number of carbon atoms in the alkyl group or alkenyl group is not particularly limited, and is preferably 12 to 22, and more preferably 16 to 22, for example. The average number of moles of ethylene oxide (that is, oxyethylene groups) added in the polyoxyethylene alkyl ether is not particularly limited, and is preferably 5 to 100, and more preferably 10 to 60, for example.

[0034] Specific examples of polyoxyethylene alkyl ethers include laureth-5, laureth-10, laureth-20, ceteth-5, ceteth-10, ceteth-15, ceteth-20, ceteth-30, ceteth-40, steareth-5, steareth-10, steareth-20, steareth-30, steareth-40, steareth-60, steareth-80, oleth-10, oleth-20, oleth-40, oleth-50, beheneth-5, beheneth-10, beheneth-20, isosteareth-10, and isosteareth-20. Among these, steareth-10, steareth-20, steareth-30, steareth-40, oleth-10, oleth-20, oleth-30, oleth-40, ceteth-10, ceteth-20, ceteth-30, ceteth-40, isosteareth-10, isosteareth-20, beheneth-10, and beheneth-20 are preferred.

[0035] Commercially available oxyethylene alkyl ethers include "BS-5", "BS-10", "BS-15", "BS-20", "BS-30", "BS-40", "BO-10V", "BO-20V", "BO-50V", "BB-10", "BB-20", "BB-30", and "BS-20" from the "NIKKOL (registered trademark) series" of Nikko Chemicals Co., Ltd., and "705", "710", "720", "605", "610", "620", "640", "1805", "1810", "1820", "BHA-5", "BHA-10", and "BHA-20" from the "EMALEX (registered trademark) series" of Nippon Emulsion Co., Ltd.

[0036] -Polyglycerin fatty acid ester- The polyglycerol structure contained in the polyglycerol fatty acid ester may be linear, branched, or cyclic. The average degree of polymerization of the polyglycerol structure contained in the polyglycerol fatty acid ester is not particularly limited, and is preferably 2 or more, and more preferably 2 to 10, for example. The number of carbon atoms in the fatty acid structure contained in the polyglycerol fatty acid ester is not particularly limited, and is preferably 12 to 22, and more preferably 14 to 18, for example.

[0037] The polyglycerol fatty acid ester may be one in which one type of fatty acid is ester-bonded to one molecule of polyglycerol, or may be one in which two or more types of fatty acids are ester-bonded to one molecule of polyglycerol.

[0038] Specific examples of polyglycerol fatty acid esters include polyglyceryl-4 oleate, polyglyceryl-5 oleate, polyglyceryl-4 stearate, polyglyceryl-5 stearate, polyglyceryl-4 isostearate, polyglyceryl-6 laurate, polyglyceryl-6 myristate, polyglyceryl-6 stearate, polyglyceryl-6 isostearate, polyglyceryl-6 oleate, polyglyceryl-10 laurate, polyglyceryl-10 myristate, glyceryl-10 palmitate, polyglyceryl-10 stearate, polyglyceryl-10 isostearate, polyglyceryl-10 oleate, and polyglyceryl-10 linoleate. Among these, polyglycerol fatty acid esters such as polyglyceryl-10 myristate, polyglyceryl-10 stearate, polyglyceryl-10 isostearate, and polyglyceryl-10 oleate are preferred.

[0039] As the polyglycerol fatty acid ester, commercially available products can be used. Examples of commercially available polyglycerol fatty acid esters include "1-ISV," "1-OV," "1-LN," and "I-MVEX PN" from the "NIKKOL (registered trademark) Decaglyn" series by Nikko Chemicals Co., Ltd.; "O-15D," "O-50D," and "M-7D" from the "Ryoto (registered trademark) Polyglycerol" series by Mitsubishi Chemical Foods Corporation; "Q-12Y-C," "Q-14Y-C," "Q-17Y-C," and "Q-18Y-C" from the "Sunsoft QY" series by Taiyo Kagaku Co., Ltd.; "A-121E-C," "A-141E-C," "A-171E-C," and "A-181E-C" from the "Sunsoft AE" series; and "J-0381V" from Riken Vitamin Co., Ltd.'s "Poem" series.

[0040] -Polyoxyethylene sorbitan fatty acid ester- The average number of moles of oxyethylene groups added in the polyoxyethylene sorbitan fatty acid ester is not particularly limited, and is, for example, preferably 2 to 150 moles, more preferably 6 to 100 moles.

[0041] The polyoxyethylene sorbitan fatty acid ester may be a compound having one ester bond in one molecule (i.e., a mono-fatty acid ester), a compound having two or more ester bonds in one molecule (i.e., a di-fatty acid ester, a tri-fatty acid ester, etc.), or a mixture of two or more compounds having different numbers of ester bonds.

[0042] Specific examples of polyoxyethylene sorbitan fatty acid esters include polysorbate-20, polysorbate-21, polysorbate-40, polysorbate-60, polysorbate-61, polysorbate-65, polysorbate-80, polysorbate-81, polysorbate-85, and the like. Among these, polysorbate-40, polysorbate-60, and polysorbate-80 are preferred.

[0043] As the polyoxyethylene sorbitan fatty acid ester, commercially available products can be used. Examples of commercially available polyoxyethylene sorbitan fatty acid esters include "TS-10V," "TS-30V," "TO-10V," and "TO-30V" from the "NIKKOL (registered trademark) series" of Nikko Chemicals Co., Ltd., Nonion LT-20 and Nonion PT-221 from NOF Corporation, and "TW-L106," "TW-L120," "TW-P120," "TW-O120V," and "TW-O320V" from the "Rheodor series" of Kao Corporation.

[0044] The transparent gel cosmetic preparation of the present disclosure may contain only one type of specific nonionic surfactant, or may contain two or more types.

[0045] The content of the specific nonionic surfactant in the transparent gel cosmetic preparation of the present disclosure is preferably 0.010% by mass to 5.0% by mass, and more preferably 0.050% by mass to 1.0% by mass, relative to the total mass of the transparent gel cosmetic preparation. When the content of the specific nonionic surfactant is 0.010% by mass or more relative to the total mass of the transparent gel cosmetic preparation, the stability of hardness over time tends to be improved. Furthermore, when the content of the specific nonionic surfactant is 5.0% by mass or less relative to the total mass of the transparent gel cosmetic preparation, the sticky feeling is suppressed and the feel upon use tends to improve.

[0046] Furthermore, in the transparent gel cosmetic preparation of the present disclosure, from the viewpoint of achieving both stabilization of transparency over time and stabilization of hardness over time, the ratio of the content of the specific nonionic surfactant to the content of the ceramide is preferably 1.0 to 1000, and more preferably 5.0 to 200, by mass.

[0047] [(D) Xanthan gum] The transparent gel cosmetic preparation of the present disclosure contains xanthan gum. In the transparent gel cosmetic preparation of the present disclosure, xanthan gum contributes to gelation. Xanthan gum is a compound whose structure contains a repeating unit with five polysaccharides: two glucose, two mannose, and one glucuronic acid.

[0048] Xanthan gum is commercially available. Examples of commercially available xanthan gum products include Nomcoat ZZ (Nisshin Oillio Group, Ltd.), KELTROL CG-T (Sansho Co., Ltd.), and KELTROL CG-SFT (Sansho Co., Ltd.).

[0049] The content of xanthan gum in the transparent gel cosmetic preparation of the present disclosure is preferably 0.010% by mass to 0.30% by mass, and more preferably 0.050% by mass to 0.15% by mass, relative to the total mass of the transparent gel cosmetic preparation. When the xanthan gum content is 0.010% by mass or more relative to the total mass of the clear gel cosmetic preparation, the clear gel cosmetic preparation is easily formed, and the feel during use (particularly the feeling of crumbling) tends to be good. Furthermore, when the xanthan gum content is 0.30% by mass or less relative to the total mass of the transparent gel cosmetic, the feel during use (particularly, skin compatibility) tends to be good. Furthermore, from the perspective of reducing the sticky feeling of the transparent gel cosmetic, the xanthan gum content is preferably 0.15% by mass or less relative to the total mass of the transparent gel cosmetic.

[0050] In the transparent gel cosmetic preparation of the present disclosure, the total content of the specific polysaccharide and xanthan gum is preferably 0.050% by mass to 0.50% by mass, and more preferably 0.10% by mass to 0.40% by mass, relative to the total mass of the transparent gel cosmetic preparation. When the total content of the specific polysaccharide and xanthan gum is 0.050% by mass or more relative to the total mass of the transparent gel cosmetic, the transparent gel cosmetic is easily formed, and the feel during use (particularly the feeling of crumbling) tends to be good. Furthermore, when the total content of the specific polysaccharide and xanthan gum is 0.50% by mass or less relative to the total mass of the transparent gel cosmetic preparation, the feel during use (particularly, compatibility with the skin) tends to be good.

[0051] In the transparent gel cosmetic preparation of the present disclosure, the ratio of the content of the specific polysaccharide to the total content of the specific polysaccharide and xanthan gum is preferably 0.10 to 1.0, and more preferably 0.30 to 0.80, by mass. When the ratio of the content of the specific polysaccharide to the total content of the specific polysaccharide and xanthan gum is 0.10 or more by mass, the feel of the transparent gel cosmetic preparation when used (particularly, reduced stickiness) tends to be good, and from the perspective of further reducing the stickiness of the transparent gel cosmetic preparation, it is preferable that the ratio be 0.30 or more. Furthermore, when the ratio of the content of the specific polysaccharide to the total content of the specific polysaccharide and xanthan gum is 1.0 or less relative to the total mass of the transparent gel cosmetic preparation, the feel during use (particularly the feeling of crumbling) tends to be good.

[0052] From the viewpoint of the transparency of the transparent gel cosmetic preparation, as described above, the specific polysaccharide is preferably locust bean gum. In this case, in the transparent gel cosmetic preparation of the present disclosure, the ratio of the content of locust bean gum to the total content of locust bean gum and xanthan gum is preferably 0.10 to 1.0, and more preferably 0.30 to 0.80, by mass.

[0053] [(E)Water] The transparent gel cosmetic preparation of the present disclosure contains water. The water is not particularly limited, and can be natural water, purified water, distilled water, ion-exchanged water, pure water, ultrapure water (Milli-Q water, etc.), etc. Milli-Q water is ultrapure water obtained using a Milli-Q water production system from Merck Millipore, a company owned by Merck. The water contained in the transparent gel cosmetic is preferably purified water, distilled water, ion-exchanged water, pure water, or ultrapure water, from the viewpoint of having few impurities.

[0054] The water content in the transparent gel cosmetic preparation of the present disclosure is not particularly limited, and for example, when a more refreshing feel is desired, a larger amount of water is preferable. The water content in the transparent gel cosmetic preparation of the present disclosure is preferably 60% by mass or more, and more preferably 70% by mass or more, relative to the total mass of the transparent gel cosmetic preparation. The upper limit of the water content is, for example, preferably 99.8% by mass, and more preferably 99.6% by mass, relative to the total mass of the transparent gel cosmetic preparation.

[0055] ((F) Specific thickener) The transparent gel cosmetic preparation of the present disclosure may further contain at least one thickener (also referred to as a specific thickener) selected from the group consisting of (acrylates / C10-30 alkyl acrylate) crosspolymer and carboxyvinyl polymer (labeled as an ingredient in cosmetics: carbomer) from the perspective of improving the feel when used (particularly, compatibility with the skin) and adjusting the hardness of the transparent gel cosmetic preparation. Among these, the specific thickener is preferably an (acrylates / C10-30 alkyl acrylate) crosspolymer.

[0056] The specific thickener is available as a commercial product. Examples of commercially available (acrylates / C10-30 alkyl acrylate) crosspolymers include trade names: PEMULEN TR-2, PEMULEN TR-2, Carbopol 1382, Carbopol ETD 2020, and Carbopol Ultrez 21 (all manufactured by The Lubrizol Corporation), AQUPEC HV-501ER, and AQUPEC SW-705ER (all manufactured by Sumitomo Seika Chemicals Co., Ltd.). Examples of commercially available carboxyvinyl polymers include the Carbopol (registered trademark) series (for example, trade names: Carbopol 980, Carbopol 981, etc., manufactured by Lubrizol Corporation), trade name: AQUPEC HV-501E, and trade name: AQUPEC SW-705E (all manufactured by Sumitomo Seika Chemicals Co., Ltd.).

[0057] When the transparent gel cosmetic preparation of the present disclosure contains a specific thickener, it may contain only one type of specific thickener, or may contain two or more types of specific thickeners.

[0058] The content of the specific thickener in the transparent gel cosmetic preparation of the present disclosure is preferably 0.010% by mass to 0.30% by mass, more preferably 0.030% by mass to 0.25% by mass, and even more preferably 0.040% by mass to 0.20% by mass, relative to the total mass of the transparent gel cosmetic preparation. When the content of the specific thickener is 0.010% by mass or more relative to the total mass of the transparent gel cosmetic, the feel of the transparent gel cosmetic when used (particularly, compatibility with the skin) tends to improve. Furthermore, if the content of the specific thickener is 0.30% by mass or less relative to the total mass of the transparent gel cosmetic, the hardness of the transparent gel cosmetic will not be too low, and the feel upon use (particularly the feeling of crumbling) will tend to be good. Furthermore, from the perspective of reducing the sticky feeling of the transparent gel cosmetic, the content of the specific thickener is preferably 0.25% by mass or less relative to the total mass of the transparent gel cosmetic.

[0059] ((G) Cyclohexanedicarboxylic acid bisethoxydiglycol ester) The transparent gel cosmetic preparation of the present disclosure may further contain cyclohexanedicarboxylic acid bisethoxydiglycol ester, which is listed as cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol in cosmetic ingredients. Cyclohexanedicarboxylic acid bis-ethoxydiglycol ester contributes to improving moisturizing feeling while minimizing stickiness. Common moisturizers such as glycerin, PEG-20, and trehalose contribute to improving moisturizing feeling, but often result in a sticky feeling. In other words, it is preferable to use cyclohexanedicarboxylic acid bis-ethoxydiglycol ester as the moisturizer used in the transparent gel cosmetic preparation of the present disclosure, compared to common moisturizers such as glycerin, PEG-20, and trehalose, from the viewpoint of achieving a moisturizing feeling while reducing stickiness.

[0060] Cyclohexanedicarboxylic acid bisethoxydiglycol ester is commercially available. An example of a commercially available product of cyclohexanedicarboxylic acid bisethoxydiglycol ester is Neosolue (registered trademark)-Aqulio (Nippon Fine Chemical Co., Ltd.).

[0061] The content of cyclohexanedicarboxylic acid bisethoxydiglycol ester in the transparent gel cosmetic preparation of the present disclosure is preferably 0.010% by mass to 1.5% by mass, more preferably 0.10% by mass to 1.0% by mass, and even more preferably 0.30% by mass to 0.80% by mass, relative to the total mass of the transparent gel cosmetic preparation. When the content of cyclohexanedicarboxylic acid bisethoxydiglycol ester is 0.010% by mass or more relative to the total mass of the transparent gel cosmetic, the feel of use of the transparent gel cosmetic tends to improve (specifically, reduced stickiness). Furthermore, when the content of cyclohexanedicarboxylic acid bis-ethoxydiglycol ester is 1.5% by mass or less relative to the total mass of the transparent gel cosmetic preparation, the feel during use (particularly the moisturizing feel) tends to be good. Furthermore, from the perspective of reducing the sticky feeling of the transparent gel cosmetic preparation and obtaining a transparent gel cosmetic preparation with excellent transparency, the content of cyclohexanedicarboxylic acid bis-ethoxydiglycol ester is preferably 1.0% by mass or less relative to the total mass of the transparent gel cosmetic preparation.

[0062] ((H) Polyoxyalkylene polyhydric alcohol ether) The transparent gel cosmetic preparation of the present disclosure may further contain a polyoxyalkylene polyhydric alcohol ether, which contributes to improving the moisturizing feeling in the transparent gel cosmetic preparation of the present disclosure. Polyoxyalkylene polyhydric alcohol ether refers to a compound in which polyoxyalkylene is added to a polyhydric alcohol via an ether bond. Examples of the polyoxyalkylene include polyoxyalkylenes having two or more repeating oxyalkylene units having 2 to 4 carbon atoms, and polyoxyethylene is preferred. The number of repeating oxyalkylene units is preferably 2 to 30, and more preferably 5 to 25. Examples of the polyhydric alcohol include glycerin, methyl glucose, sorbitol, sucrose, pentaerythritol, glucose, etc., and among these, glycerin or methyl glucose is preferred.

[0063] From the viewpoint of improving the feel of use of the transparent gel cosmetic preparation, the polyoxyalkylene polyhydric alcohol ether is preferably a polyethylene glycol ether of glycerin or a polyethylene glycol ether of methyl glucose. In particular, from the viewpoint of reducing stickiness and obtaining a transparent gel cosmetic preparation with excellent transparency, the polyoxyalkylene polyhydric alcohol ether is preferably a polyethylene glycol ether of methyl glucose.

[0064] Specific examples of polyoxyalkylene polyhydric alcohol ethers include methyl gluceth-10, methyl gluceth-20, glyceryl-7, glyceryl-12, glyceryl-18, glyceryl-26, PPG-10 methyl glucose, PPG-20 methyl glucose, PPG-6 glyceryl, PPG-24 glyceryl-24, PEG / PPG / polybutylene glycol-8 / 5 / 3 glycerin (all of which are ingredient names listed in cosmetics), etc. Among these, methyl gluceth-10, methyl gluceth-20, or glyceryl-12 are preferred as polyoxyalkylene polyhydric alcohol ethers, and from the viewpoint of obtaining a transparent gel-type cosmetic preparation with excellent transparency, methyl gluceth-10 or methyl gluceth-20 are more preferred.

[0065] Polyoxyalkylene polyhydric alcohol ethers are commercially available. Examples of commercially available polyoxyalkylene polyhydric alcohol ethers include methyl gluceth-10, trade name: Macbiobride (registered trademark) MG-10E (NOF Corporation), and methyl gluceth-20, trade name: Macbiobride (registered trademark) MG-20E (NOF Corporation). Examples of Glycereth-12 include Salacos G-12E (Nisshin Oillio Group, Ltd.) and Conion RG-120 (New Japan Chemical Co., Ltd.).

[0066] When the transparent gel cosmetic preparation of the present disclosure contains a polyoxyalkylene polyhydric alcohol ether, it may contain only one type of polyoxyalkylene polyhydric alcohol ether, or it may contain two or more types of polyoxyalkylene polyhydric alcohol ether.

[0067] The content of polyoxyalkylene polyhydric alcohol ether in the transparent gel cosmetic preparation of the present disclosure is preferably 1.0% by mass to 10% by mass, and more preferably 2.0% by mass to 8.0% by mass, relative to the total mass of the transparent gel cosmetic preparation. When the content of polyoxyalkylene polyhydric alcohol ether is 1.0% by mass or more relative to the total mass of the transparent gel cosmetic, the feel (particularly the moisturizing feel) of the transparent gel cosmetic when used tends to be improved. Furthermore, when the content of polyoxyalkylene polyhydric alcohol ether is 10% by mass or less relative to the total mass of the transparent gel cosmetic preparation, the feel during use (particularly reduced stickiness) tends to be good, and from the perspective of further reducing the stickiness of the transparent gel cosmetic preparation, a content of 8.0% by mass or less is more preferable.

[0068] [Other additives] The transparent gel cosmetic preparation of the present disclosure may contain components other than those described above (hereinafter referred to as "other additives") as needed, provided that the effects are not impaired. The other components may be such that one component performs two or more functions.

[0069] The transparent gel cosmetic preparation of the present disclosure may contain, as appropriate, additive components that are commonly used in cosmetics, quasi-drugs, and the like. Examples of additive components include functional components that exhibit useful beauty effects (for example, moisturizing effects, skin conditioning effects, etc.) when used in cosmetics, and medicinal components such as allantoin. Other additive ingredients include surfactants other than specific nonionic surfactants, carotenoids such as phenoxyethanol and astaxanthin, preservatives such as ethylhexylglycerin, vitamin E compounds such as tocopherol, polyhydric alcohols, colorants, thickeners other than specific thickeners, pH adjusters, buffers, fragrances, antibacterial agents, ultraviolet absorbers, active oxygen removers, antimicrobial agents, and minerals. Examples of pH adjusters that can be used include potassium hydroxide, sodium hydroxide, hydrochloric acid, etc. Furthermore, from the perspective of forming a gel state, it is preferable that the transparent gel cosmetic preparation of the present disclosure does not contain sodium citrate.

[0070] [pH] The pH of the transparent gel cosmetic preparation of the present disclosure is preferably 4-8, and more preferably 5-7. The pH of the transparent gel cosmetic preparation in the present disclosure is measured at 25°C using a pH meter, such as a model HM-41X manufactured by Toa DKK Co., Ltd.

[0071] 〔hardness〕 The hardness of the transparent gel cosmetic preparation of the present disclosure is 5 g or more, preferably 5 g to 70 g, more preferably 10 g to 65 g, and even more preferably 10 g to 50 g. When the hardness of the transparent gel cosmetic preparation of the present disclosure is 5 g or more, it can exhibit a gel state. Furthermore, when the hardness of the transparent gel cosmetic preparation of the present disclosure is 70 g or less (preferably 65 g or less), the sensation during use (particularly, compatibility with the skin) tends to be good. The hardness of the transparent gel cosmetic preparation in the present disclosure is a value measured by the method described in the Examples section. Furthermore, the transparent gel cosmetic preparation of the present disclosure preferably has an "initial hardness" measured by the method described in the Examples section of the specification of the present invention of 5 g to 40 g, and more preferably 10 g to 35 g. The transparent gel cosmetic preparation of the present disclosure preferably has a "hardness change range" determined by the method described in the Examples section of the specification of the present invention of 0 g to 30 g, and more preferably 0 g to 15 g. The transparent gel cosmetic preparation of the present disclosure preferably has a "hardness after aging" measured by the method described in the Examples section of the specification of the present invention of 5 g to 70 g, and more preferably 10 g to 50 g.

[0072] [Absorbance] From the viewpoint of exhibiting transparency, the absorbance of the transparent gel cosmetic preparation of the present disclosure for light with a wavelength of 625 nm is 0.15 or less, preferably 0.10 or less, and more preferably 0.050 or less. A transparent gel cosmetic preparation of the present disclosure can be said to be transparent when its absorbance at a wavelength of 625 nm is 0.15 or less. The lower limit of the absorbance at a wavelength of 625 nm for the transparent gel cosmetic preparation of the present disclosure can be 0. The absorbance of the transparent gel cosmetic preparation of the present disclosure at a wavelength of 625 nm is measured using the method described in the Examples section. Furthermore, the transparent gel cosmetic preparation of the present disclosure preferably has an "absorbance change range" determined by the method described in the Examples section of the specification of the present invention of 0 to 0.10, and more preferably 0 to 0.05. The transparent gel cosmetic preparation of the present disclosure preferably has an "absorbance after aging" measured by the method described in the Examples section of the specification of the present invention of 0 to 0.25, and more preferably 0 to 0.10.

[0073] [Uses of transparent gel cosmetics] Examples of uses of the transparent gel cosmetic preparation of the present disclosure include cosmetics (for example, skin care cosmetics such as lotions and serums) and quasi-drugs.

[0074] [Method of manufacturing a transparent gel cosmetic] The method for producing the transparent gel cosmetic preparation of the present disclosure is not particularly limited. The transparent gel cosmetic preparation of the present disclosure can be obtained using ceramide, a specific polysaccharide, a specific nonionic surfactant, xanthan gum, water, and, as necessary, other ingredients, according to a known method for producing a transparent gel cosmetic preparation. One suitable method for producing the transparent gel cosmetic preparation of the present disclosure is to mix a specific polysaccharide, a specific nonionic surfactant, xanthan gum, water, and other components, such as a specific thickener and polyhydric alcohol, as needed, by stirring at, for example, 80°C (hereinafter referred to as the "mixing step"), and then add a ceramide-containing dispersion that has been prepared in advance and other components, as needed. An example of a suitable method for producing the transparent gel cosmetic preparation of the present disclosure will be described below, but explanations of matters common to the transparent gel cosmetic preparations already described, such as the components of the transparent gel cosmetic preparation and their amounts, will be omitted.

[0075] [Mixing process] In the mixing step, the specific polysaccharide, the specific nonionic surfactant, xanthan gum, and water are added, heated to 80°C, and then stirred and mixed. The method for mixing these components is not particularly limited. As described above, in this step, other components such as the specific thickener and polyhydric alcohol, which are used as needed, may also be added and stirred and mixed. Here, for example, the specific polysaccharide, the specific nonionic surfactant, the xanthan gum, and the water may be mixed all at once, or the specific polysaccharide and the water, the specific nonionic surfactant and the water, and the xanthan gum and the water may be separately stirred to prepare mixed solutions, and then the resulting three mixed solutions may be mixed. The mixing step is not limited to the above-described method. In the mixing step, the ceramide-containing dispersion may be added together with the specific polysaccharide, the specific nonionic surfactant, xanthan gum, and water, and the mixture may be stirred and mixed.

[0076] The mixing means is not particularly limited, and any commercially available mixing means may be used. Examples of the mixing means include a stirrer, a paddle mixer, an impeller mixer, a homomixer, a disper mixer, an ultra mixer, a high-pressure homogenizer, an ultrasonic homogenizer, etc. Among these, the mixing means is preferably at least one selected from the group consisting of a homomixer and a disper mixer.

[0077] In the mixing step, the temperature at which the specific polysaccharide, the specific nonionic surfactant, the xanthan gum, and the water are mixed is preferably set to 70° C. to 90° C. When a specific thickener and a polyhydric alcohol are used as other components, the specific thickener, the specific polysaccharide, the specific nonionic surfactant, the xanthan gum, the water, and the polyhydric alcohol are preferably mixed in this step at 70° C. to 90° C. Thus, the temperature at which the other components are mixed is not particularly limited and can be set appropriately depending on the types of components to be mixed, etc. The stirring conditions for mixing the components are not particularly limited as long as they can be sufficiently mixed, and can be set appropriately depending on the mixing means. For example, when a homomixer is used as the mixing means, the components can usually be stirred at 500 rpm (revolutions per minute; the same applies hereinafter) to 8000 rpm for 5 to 60 minutes.

[0078] The method for producing the transparent gel cosmetic preparation of the present disclosure may include steps other than the mixing step (so-called other steps) as necessary. Examples of other steps include a degassing step, a heat sterilization step, a cooling step, a removal step, etc. Methods known in the art may be applied to the degassing step, heat sterilization step, cooling step, removal step, etc. [Example]

[0079] The transparent gel cosmetic preparation of the present disclosure will be explained in more detail using examples, but the transparent gel cosmetic preparation of the present disclosure is not limited to the following examples as long as it does not deviate from the gist of the present disclosure.

[0080] Example 1 [Preparation of transparent gel cosmetic preparation] 0.050 parts by mass of locust bean gum as a specific polysaccharide, 0.10 parts by mass of polyglyceryl-10 myristate as a specific nonionic surfactant, 0.050 parts by mass of xanthan gum, and 50 parts by mass of pure water were mixed together. The resulting mixture was heated to 80°C and stirred at 2000 rpm for 20 minutes using a homogenizer (model name: Homomixer HM-310, AS ONE Corporation), and then cooled to 40°C. To the cooled mixture, 1.0 part by mass of a ceramide-containing dispersion composition prepared in advance by the method described below was added, and pure water was further added so that the total amount was 100 parts by mass.The mixture was then stirred at 2000 rpm for 20 minutes using a homogenizer (model name: Homomixer HM-310, AS ONE Corporation). The stirred mixture was then degassed under vacuum to obtain the cosmetic of Example 1 (transparent gel cosmetic).

[0081] <Preparation of ceramide-containing dispersion composition> The following ingredients were stirred at room temperature (25°C) for 1 hour to obtain an oil phase composition. -Composition of oil phase composition- Ceramide NP: 4.8g (Product name: Ceramide IIIB, Evonik) Ceramide AP: 5.9g (Product name: Ceramide VI, Evonik) Oleic acid: 1.1g Ethanol: 412.0g

[0082] The following ingredients were stirred at room temperature (25°C) for 1 hour to obtain an aqueous phase composition. -Composition of aqueous phase composition- Glycerin: 53.4g 1,3-butylene glycol: 53.4g Sodium hydroxide: 3.2g ·Pure water: 876.0g

[0083] The obtained oil phase composition (oil phase) and aqueous phase composition (aqueous phase) were micro-mixed in a ratio (mass ratio) of 1:7 using a collision-type KM type micromixer 100 / 100 to obtain a dispersion. The conditions for using the micromixer are as follows:

[0084] <Micro Mixer Usage Conditions> -Microchannel- Oil phase microchannel Cross-sectional shape / width / depth / length = Rectangular / 70μm / 100μm / 10mm Aqueous phase microchannel Cross-sectional shape / width / depth / length = Rectangular / 490μm / 100μm / 10mm -Flow rate- The aqueous phase is introduced into the outer ring at a flow rate of 21.0 ml / min., and the oil phase is introduced into the inner ring at a flow rate of 3.0 ml / min., and micromixed.

[0085] The obtained dispersion was desolvated using a centrifugal thin-film vacuum evaporator (model name: Evapol CEP-lab, Okawara Manufacturing Co., Ltd.) until the ethanol concentration was 0.1 mass% or less, and then concentrated and adjusted so that the total ceramide concentration was 1.0 mass%, thereby obtaining a ceramide-containing dispersion composition.

[0086] [Examples 2 to 28 and Comparative Examples 1 to 9] The transparent gel cosmetic preparations or liquid cosmetic preparations of Examples 2 to 28 and Comparative Examples 1 to 9 were obtained in the same manner as in Example 1, except that in preparing the transparent gel cosmetic preparation of Example 1, the ingredients and their blending amounts were appropriately changed to obtain the compositions shown in Tables 1 to 6 below.

[0087] [Evaluation and Measurement] The cosmetics obtained in each example were subjected to the following evaluations and measurements, and the results are shown in Tables 1 to 6 as appropriate. The unit of the amount of each component listed in Tables 1 to 6 is "% by mass," and the amount of water is such that the total amount of each cosmetic is 100% by mass. In Tables 1 to 6, a "-" in the composition column indicates that the corresponding component was not included. Furthermore, in Tables 1 to 6, "C / A" indicates the ratio of the specific nonionic surfactant content to the ceramide content, the B+D content indicates the total content of the specific polysaccharide and xanthan gum, and B / (B+D) indicates the ratio of the polysaccharide content to the total content of the specific polysaccharide and xanthan gum. A "-" in any of these columns means that one of the specific polysaccharide, specific nonionic surfactant, and xanthan gum was not included, and the value could not be calculated. Furthermore, Example 5 listed in Tables 2 to 5 is listed for comparison with other Examples and Comparative Examples, and is the same as Example 5 listed in Table 1. Example 13 listed in Table 6 is listed for comparison with other Examples, and is the same as Example 13 listed in Table 4.

[0088] 1. Checking the initial hardness and properties of the cosmetic material It was confirmed by hardness measurement that the cosmetic preparation obtained in each example was a transparent gel cosmetic preparation. The hardness of the cosmetic material obtained in each example was measured as follows. 50 g of each cosmetic was placed in a glass container measuring 40 mm in diameter and 75 mm in height, sealed, and stored at 25°C for 24 hours. The hardness of the cosmetic after storage was measured using a rheometer (model name: FUDOH REHOMETER, Rheotech Co., Ltd.). The hardness of the cosmetic obtained by this measurement was designated as "initial hardness." Hardness was measured by pressing a disk-shaped probe (20 mm in diameter) into each cosmetic material at 25°C for 20 mm at a load of 200 g and a speed of 1 mm / sec, and the maximum load value from each cosmetic material was used as the hardness. The hardness was determined based on the obtained hardness value (unit: g) and was judged according to the following criteria.

[0089] (standard) A (properties: gel): Initial hardness is 10g or more and 40g or less. B (Properties: loose gel): Initial hardness is 5.0g or more and less than 10g. C (Property: Liquid): Initial hardness is less than 5.0g.

[0090] 2. Initial transparency Immediately after preparation, each cosmetic was placed in a polystyrene (PS) disposable cell with an optical path length of 0.4 cm, and the cell was centrifuged at 4000 rpm for 2 minutes using a small refrigerated centrifuge (model: CF5RX, Hitachi Koki Co., Ltd., swing rotor: T4SS31) to degas the cells. For each cosmetic preparation after the degassing treatment, the absorbance of light at a wavelength of 625 nm was measured using a spectrophotometer (model: U-2550 (Shimadzu Corporation)). The obtained absorbance measurement value was used as an index for evaluating the transparency of the cosmetic preparation. The absorbance obtained by this measurement was also referred to as the "initial absorbance." The evaluation criteria are as follows: The smaller the measured absorbance value, the better the transparency of the cosmetic.

[0091] (standard) A: The initial absorbance measurement is 0.050 or less. B: The initial absorbance measurement value is greater than 0.050 and equal to or less than 0.15. C: Initial absorbance reading is greater than 0.15.

[0092] 3.Hardness stability over time 50 g of each cosmetic was placed in a glass container measuring 40 mm in diameter and 75 mm in height, sealed, and stored at 50°C for one week, after which it was returned to room temperature (25°C). The hardness was then measured using the same method as in 1 above. The hardness obtained in this measurement was designated as the "hardness after aging." The hardness change range was calculated using the hardness after aging and the initial hardness obtained in 1 above according to the following formula 1, and the stability of hardness over time was evaluated from the calculated value. The evaluation criteria are as follows: Formula 1: Hardness change (g) = hardness after aging (g) - initial hardness (g)

[0093] (standard) A: The hardness change range is less than 15g. B: The hardness change range is 15 g or more and less than 30 g. C: The hardness change range is 30 g or more.

[0094] 4. Transparency stability over time 50 g of each cosmetic was placed in a glass container measuring 40 mm in diameter and 75 mm in height, sealed, and stored at 50°C for one week, after which it was returned to room temperature (25°C). The absorbance was then measured using the same method as in 2 above. The absorbance obtained in this measurement was designated as the "absorbance after aging." The absorbance after aging and the initial absorbance obtained in 2. above were used to calculate the absorbance change range according to the following formula 2, and the stability of transparency over time was evaluated from the calculated value. The evaluation criteria are as follows: Equation 2: Absorbance change range = absorbance after time - initial absorbance

[0095] (standard) A: The absorbance change range is less than 0.050. B: The absorbance change range is 0.050 or more and less than 0.100. C: The absorbance change range is 0.100 or more.

[0096] 5. Evaluation of usability The cosmetic compositions obtained in each example were evaluated for feeling of crumbling, compatibility with the skin, stickiness, and moisturizing feeling as follows.

[0097] 5-1. Evaluation of collapse Immediately after preparation, each cosmetic product was used by 10 monitors in the following manner, and the feeling of breakage was evaluated. Specifically, the monitors were asked to take 100 μL of the cosmetic onto their finger and spread it on the inside of the forearm of the opposite arm, and based on the degree of change in the shape of the cosmetic, the feeling of crumbling was evaluated using the following ranks: A indicates the rank with the best feeling in use. The rank selected by the monitors most frequently was taken as the evaluation result of the feeling of crumbling, and if the number of selections was the same, the better rank was taken as the evaluation result of the feeling of crumbling.

[0098] ~Rank~ A: The degree of change in the shape of the cosmetic (disintegration) was felt to be large, and the disintegration sensation was good. B: The cosmetic was found to have changed in shape (disintegrated), and the sense of disintegration was normal. C: The cosmetic is liquid and does not crumble easily.

[0099] 5-2. Evaluation of skin compatibility Immediately after preparation, each cosmetic product was used by 10 monitors in the following manner, and the compatibility with the skin was evaluated. Specifically, the monitors were asked to take 100 μL of the cosmetic onto their finger and spread it on the inside of the forearm of the opposite arm, and the ease with which the cosmetic blended with the skin (how easily the cosmetic crumbled upon application adhered to the skin) was evaluated using the following rankings. A indicates the rank with the best feel. The rank selected by each monitor most frequently was used as the evaluation result for skin compatibility, and if the number of selections was the same, the better rank was used as the evaluation result for skin compatibility.

[0100] ~Rank~ A: The transparent gel cosmetic changes to a liquid and feels great on the skin. B: The transparent gel cosmetic preparation is difficult to change into a liquid state, or the transparent gel cosmetic preparation changes into a liquid state and feels like it blends well with the skin. C: Although the clear gel cosmetic changes to a liquid, it takes longer for the cosmetic to blend into the skin as it is repelled by the skin, and as a result, it does not feel like it blends into the skin.

[0101] 5-3. Evaluation of stickiness Immediately after preparation, each cosmetic product was used by 10 monitors in the following manner, and the stickiness was evaluated. Specifically, the monitors were asked to take 100 μL of the cosmetic onto their finger and spread it on the inside of the forearm of the opposite arm, and the stickiness of the skin surface during spreading or after application was evaluated using the following ranks: A indicates the rank with the best usability. The rank selected by the monitors most frequently was taken as the evaluation result for stickiness, and if the number of selections was the same, the better rank was taken as the evaluation result for stickiness.

[0102] ~Rank~ A: It doesn't feel sticky. B: Slight stickiness is felt. C: It feels sticky.

[0103] 5-4. Evaluation of moisturizing sensation Immediately after preparation, each cosmetic product was used by 10 monitors in the following manner, and the moisturizing sensation was evaluated. Specifically, the monitors were asked to take 100 μL of the cosmetic onto their finger and spread it on the inside of the forearm of the opposite arm, and the moisturizing feeling on the skin surface after application was evaluated using the following ranks: A indicates the rank with the best usability. The rank selected most frequently by each monitor was taken as the evaluation result for moisturizing feeling, and if the number of selections was the same, the better rank was taken as the evaluation result for moisturizing feeling.

[0104] ~Rank~ A: I feel a strong moisturizing effect. B: It feels moisturizing. C: Slight moisturizing sensation. D: I don't feel any moisturizing sensation.

[0105] [Table 1]

[0106] [Table 2]

[0107] [Table 3]

[0108] [Table 4]

[0109] [Table 5]

[0110] [Table 6]

[0111] As shown in Tables 1 to 6, each of the cosmetic preparations of the Examples was a gel-like, transparent, and transparent gel-like cosmetic preparation. It was also found that each of the cosmetic preparations of the Examples had excellent stability over time in both hardness and transparency.

[0112] Example 29: Preparation of transparent gel cosmetic X <Preparation of acylceramide-containing dispersion composition> 39.5 g of Solution A having the following composition was stirred and mixed at 110°C for 10 minutes to obtain a crude dispersion. The obtained crude dispersion was cooled to 100°C, and Solution B, in which 60.51 g of the components having the following composition were dissolved at 70°C, was added. The mixture was then dispersed for 3 minutes using an ultrasonic homogenizer (model: US-600, Nippon Seiki Seisakusho Co., Ltd.) to obtain a preliminary crude dispersion. The obtained preliminary crude dispersion was then cooled to approximately 60°C, and subjected to high-pressure emulsification (dispersion) treatment five times at a pressure of 245 MPa using an ultra-high-pressure emulsifier (model: Ultimizer HJP-25005, Sugino Machine Co., Ltd.) to obtain an acylceramide-containing dispersion composition.

[0113] [Liquid A] Ceramide EOP: 0.3 parts by weight (Product name: Ceramide I, manufactured by Evonik) Cholesterol: 0.3 parts by weight (Product name: Cholesterol JSQI, Nippon Fine Chemical Co., Ltd.) 1,3-butylene glycol (Daicel Corporation): 0.9 parts by mass Decaglycerin monomyristate ester: 3.0 parts by mass (Product name: NIKKOL (registered trademark) Decaglyn 1-M, HLB: 14.0, Nikko Chemicals Co., Ltd.) Glycerin (Cosmetic Concentrated Glycerin, Kao Corporation): 35.0 parts by weight

[0114] [Liquid B] Lecithin: 4.0 parts by weight (Product name: SLP-PC70, Tsuji Oil Mills Co., Ltd.) Iodopropynyl butylcarbamate: 0.01 parts by mass (Product name: GLYCACIL, Lonza Japan Co., Ltd.) ·Pure water: 56.5 parts by mass

[0115] A transparent gel cosmetic preparation X having the following composition was prepared in the same manner as in Example 1 (total amount 100% by mass). [Composition] [Content (mass%)] Allantoin 0.2 Locust bean gum 0.075 Xanthan gum 0.075 Glycerin 7.0 BG 7.0 DPG 4.5 Cyclohexane-1,4-dicarboxylic acid bisethoxydiglycol 0.5 Methylgluceth-10 5.0 ·(Acrylates / C10-30 alkyl acrylate) crosspolymer 0.05 Polyglyceryl-10 Myristate 0.1 Ceramide-containing dispersion composition (obtained by the above method) 1.0 Acylceramide-containing dispersion composition (obtained by the above method) 0.2 Oolong tea extract BG (Maruzen Pharmaceutical Co., Ltd.) 0.1 Rooibos extract (Ichimaru Pharcos Co., Ltd.) 0.001 Phycosaccharide AI-G (Ichnos Co., Ltd.) 0.02 Scutellaria root extract (Ichimaru Pharcos Co., Ltd.) 0.001 Bilberry leaf extract (Ichimaru Pharcos Co., Ltd.) 0.001 Phenoxyethanol 0.30 Methylparaben 0.10 ·Appropriate amount of sodium hydroxide Water remaining

[0116] Each component listed in Tables 1 to 6 and the formulation examples will be described in detail below. Allantoin (RonaCare Allantoin (Merck)) Locust bean gum (GENUGUM RL-200-Z (Sansho Co., Ltd.) Guar gum (SUPERGEL CSA 200 / 50 (Sansho Co., Ltd.) Tara gum (Spinogam (Fuso Chemical Co., Ltd.) κ-Carrageenan (GENUGEL WR-78-JK (Sansho Co., Ltd.) Gellan gum (KELCOGEL CG-LA (Sansho Co., Ltd.) Agar (Ultra Agar AX-200 (Ina Foods Co., Ltd.) Polyglyceryl-10 myristate (NIKKOL Decaglyn I-MVEX PN (Nikko Chemicals Co., Ltd.)) Polysorbate-60 (NIKKOL TS-10V (Nikko Chemicals Co., Ltd.) Steareth-20 (NIKKOL BS-20 (Nikko Chemicals Co., Ltd.) PEG-60 hydrogenated castor oil (NIKKOL HCO-60 (Nikko Chemicals Co., Ltd.)) Sodium stearoyl glutamate (Amisoft HS-11P (Ajinomoto Healthy Supply Co., Ltd.) Xanthan gum (Nomcoat ZZ (Nisshin Oillio Group Co., Ltd.) Acrylates / C10-30 alkyl acrylate crosspolymer (Carbopol 1382 (Lubrizol)) Carbomer (carboxymethyl polymer, Carbopol 980 (Lubrizol)) Cyclohexanedicarboxylic acid bisethoxydiglycol ester (Neosolue®-Aqulio (Nippon Fine Chemical Co., Ltd.)) Methyl gluceth-10 (Macbiobride (registered trademark) MG-10E (NOF Corporation)) Methyl gluceth-20 (Macbiobride (registered trademark) MG-20E (NOF Corporation)) Glycereth-12 (product name: Salacos G-12E (Nisshin Oillio Group Co., Ltd.)

Claims

1. Ceramide and At least one polysaccharide selected from the group consisting of locust bean gum, guar gum, and tara gum; at least one nonionic surfactant selected from the group consisting of polyoxyethylene alkyl ethers, polyglycerin fatty acid esters, and polyoxyethylene sorbitan fatty acid esters; Xanthan gum and Water and cyclohexanedicarboxylic acid bisethoxydiglycol ester, A transparent gel cosmetic comprising:

2. 2. The transparent gel cosmetic preparation according to claim 1, wherein the polysaccharide is locust bean gum.

3. 3. The transparent gel cosmetic preparation according to claim 1, wherein the nonionic surfactant is a polyglycerol fatty acid ester.

4. 4. The transparent gel cosmetic preparation according to claim 1, comprising at least one thickener selected from the group consisting of an (acrylates / C10-30 alkyl acrylate) crosspolymer and a carboxyvinyl polymer.

5. 5. The transparent gel cosmetic according to claim 4, wherein the content of the thickener is 0.010% by mass to 0.30% by mass relative to the total mass of the transparent gel cosmetic.

6. 6. The transparent gel cosmetic according to any one of claims 1 to 5, wherein the total content of the polysaccharide and the xanthan gum is 0.050% by mass to 0.50% by mass, relative to the total mass of the transparent gel cosmetic.

7. 7. The transparent gel cosmetic preparation according to claim 1, wherein the ratio of the content of the polysaccharide to the total content of the polysaccharide and the xanthan gum is 0.10 to 1.0 by mass.

8. 3. The transparent gel cosmetic according to claim 2, wherein the content of the locust bean gum is 0.030% by mass to 0.30% by mass relative to the total mass of the transparent gel cosmetic.

9. 9. The transparent gel cosmetic preparation according to claim 1, wherein the content of the ceramide is 0.0010% by mass to 1.0% by mass relative to the total mass of the transparent gel cosmetic preparation.

10. 10. The transparent gel cosmetic preparation according to any one of claims 1 to 9, comprising a polyoxyalkylene polyhydric alcohol ether.

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