Cosmetic composition

Abstract

To provide a novel cosmetic composition that gives a refreshing skin touch during rinsing, can stably keep a bicontinuous microemulsion structure in a wide temperature range, and causes little irritation to the eyes.SOLUTION: A cosmetic composition contains the following components (A)-(G), with a mixed HLB of the components (A) and (B) being 6.5-13.0. Component (A): a polyglycerol fatty acid ester comprising a branched and / or unsaturated fatty acid and a polyglycerol with an average degree of polymerization of glycerols of 7-14. (B): a polyglycerol fatty acid ester comprising a branched and / or unsaturated fatty acid and a polyglycerol with an average degree of polymerization of glycerols of 2-3. (C): a polyglycerol fatty acid ester with an HLB or a mixed HLB of 8.0-17.0. (D): a liquid oil. (E): an anionic surfactant. (F): a polyhydric alcohol component. (G): water.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a composition for cosmetics and a cosmetic containing the composition.

Background Art

[0002] There is a demand for a cosmetic having excellent cleansing power and a refreshing feeling during rinsing. However, in order to obtain excellent cleansing power, it is necessary to blend a large amount of an oil agent. Therefore, a strong oily feeling is felt during rinsing, and it is difficult to obtain a refreshing feeling. As a cosmetic that can solve the above problems, for example, the cosmetics of Patent Documents 1 to 4 are disclosed.

[0003] In addition, as a cosmetic particularly excellent in cleansing power and refreshing feeling during rinsing, a cosmetic having a bicontinuous microemulsion structure in which an oil phase and an aqueous phase are bicontinuous has been proposed (Patent Documents 5 to 7). Since the bicontinuous microemulsion structure has an oil phase as a continuous phase, it easily blends with makeup. Furthermore, since the interfacial tension is very low, when it is inverted to an O / W emulsion during rinsing, the particle diameter of the oil is very small, and a refreshing feeling is easily obtained.

[0004] For example, Patent Document 5 discloses a skin cleansing agent composition comprising a bicontinuous microemulsion that is low in eye irritation and stable in a wide temperature range, containing (A) one or more selected from a polyglycerol fatty acid ester composed of a branched-chain fatty acid and glycerin and a polyglycerol fatty acid ester composed of an unsaturated fatty acid and polyglycerol, the total HLB of which is 9 to 12, (B) a dihydric alcohol, (C) a liquid oil, and (D) water, and the skin cleansing agent composition comprising a bicontinuous microemulsion in which the component (A) is 8% by mass or more and less than 15% by mass in the total composition.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] However, while the skin cleansing composition described in Patent Document 5 has been shown to be stable in the temperature range of 5 to 45°C immediately after manufacturing (30 minutes), it may lack stability during transportation, in harsh environments at the destination, or after long-term storage. It has become clear that there is a challenge in maintaining a bicontinuous microemulsion structure stably over a wide temperature range for a long period of time. Furthermore, although the skin cleansing composition described in Patent Document 5 is said to have low eye irritation, this is not entirely satisfactory, and further improvements are needed. In addition, the compositions disclosed in Patent Documents 6 and 7 were not entirely satisfactory in terms of temperature stability and eye irritation.

[0007] The object of the present invention is to provide a novel cosmetic composition that provides a refreshing skin feel when rinsed, can stably maintain a bicontinuous microemulsion structure over a wide temperature range, and has low eye irritation, as well as a cosmetic composition containing the composition. [Means for solving the problem]

[0008] The present invention relates to the following [1]~[2]. [1] A cosmetic composition containing the following components (A) to (G), wherein the mixed HLB of component (A) and component (B) is 6.5 to 13.0. Component (A): Polyglycerin fatty acid ester consisting of branched-chain and / or unsaturated fatty acids and polyglycerin with an average degree of polymerization of 7 to 14. Component (B): Polyglycerin fatty acid ester consisting of branched-chain and / or unsaturated fatty acids and polyglycerin with an average degree of polymerization of 2-3. Component (C): One or more polyglycerol fatty acid esters selected from the group consisting of the following components (C1) and (C2), with an HLB or mixed HLB of 8.0 to 17.0. Component (C1): Polyglycerin fatty acid ester consisting of a straight-chain saturated fatty acid with 8 to 12 carbon atoms and polyglycerin with an average degree of polymerization of 7 to 14. Component (C2): Polyglycerin fatty acid ester consisting of a straight-chain saturated fatty acid with 8 to 12 carbon atoms and polyglycerin with an average degree of polymerization of 2 to 3. Ingredients (D): Liquid oil Ingredient (E): Anionic surfactant Ingredient (F): Polyhydric alcohol Ingredient (G): Water A cosmetic containing the cosmetic composition described in [2][1]. [Effects of the Invention]

[0009] The present invention provides a novel cosmetic composition that provides a refreshing skin feel during rinsing, can stably maintain a bicontinuous microemulsion structure over a wide temperature range, and has low eye irritation, as well as a cosmetic composition containing the composition. [Modes for carrying out the invention]

[0010] Patent Document 1 points out that when anionic surfactants are used in combination with nonionic surfactants, the oily feeling during rinsing becomes strong, resulting in problems with the user experience. However, after diligently investigating the above problem, the present inventors unexpectedly discovered that by using a specific combination of polyglycerin fatty acid esters in combination with anionic surfactants, it is possible to create a cosmetic composition that is excellent in temperature stability and less likely to cause eye irritation without compromising the refreshing feeling. The reason why the present invention exhibits such excellent effects is unknown, but it is thought that the combination of surfactants with different average degrees of polymerization of glycerin in the polyglycerin fatty acid esters and HLBs enhances the flexibility of the interfacial film, prevents changes in the curvature of the interfacial film due to temperature, and improves temperature stability and reduces eye irritation. Furthermore, it is thought that the anionic surfactant promotes the phase inversion to O / W emulsification during rinsing, which also contributes to the refreshing feeling.

[0011] The cosmetic composition of the present invention comprises three or more specific polyglycerin fatty acid esters as components (A), (B), and (C), a liquid oil as component (D), an anionic surfactant as component (E), a polyhydric alcohol as component (F), and water as component (G). The mixed HLB of component (A) and component (B) is 6.5 to 13.0, preferably 7.0 to 12.5, more preferably 8.0 to 12.0, and even more preferably 9.0 to 11.5, from the viewpoint of temperature stability of the bicontinuous microemulsion structure.

[0012] In this specification, HLB refers to the value measured by Griffin's calculation method described below, and the mixed HLB of component (A) and component (B) is calculated using additivity. That is, the mixed HLB in this specification is the weighted average value of component (A) and component (B). The same applies to the mixed HLB when two or more types of component (C), described later, are used. The following formula is used when calculating the HLB of polyglycerol fatty acid esters in this specification. HLB = 20(1 - S / A) S: Saponification value of polyglycerol fatty acid esters A: Neutralization value of raw fatty acids

[0013] Component (A) is a polyglycerol fatty acid ester composed of a polyglycerol with an average degree of polymerization of 7 to 14 between a branched-chain and / or unsaturated fatty acid and glycerin. The number of carbon atoms of the constituent fatty acid in component (A) is preferably 8 to 22, more preferably 16 to 20, and those with an HLB of 5.0 to 16.0 can preferably be used. For example, heptaglyceryl oleate, heptaglyceryl dioleate, decaglyceryl dioleate, decaglyceryl diisostearate, tridecaglyceryl pentaoleate, tridecaglyceryl heptaoleate, etc. can be mentioned, and decaglyceryl dioleate is preferable.

[0014] From the viewpoint of the temperature stability of the bi-continuous microemulsion structure, the content of component (A) in the cosmetic composition of the present invention is preferably 5.0 to 15.0% by mass, more preferably 6.0 to 13.0% by mass, still more preferably 7.0 to 11.0% by mass, and still more preferably 7.5 to 10.0% by mass. When two or more kinds of component (A) are used, the content refers to the total amount thereof.

[0015] Component (B) is a polyglycerol fatty acid ester composed of a polyglycerol with an average degree of polymerization of 2 to 3 between a branched-chain and / or unsaturated fatty acid and glycerin. The number of carbon atoms of the constituent fatty acid in component (B) is preferably 8 to 22, more preferably 8 to 18, and those with an HLB of 3.5 to 10.0 can preferably be used. For example, diglyceryl oleate, diglyceryl diisostearate, triglyceryl diisostearate, ethylhexyl diglycerin, etc. can be mentioned, and diglyceryl oleate, diglyceryl diisostearate, triglyceryl diisostearate are preferable, and diglyceryl oleate is more preferable.

[0016] From the perspective of the temperature stability of the bicontinuous microemulsion structure, the content of component (B) in the cosmetic composition of the present invention is preferably 0.1 to 5.0% by mass, more preferably 0.3 to 3.0% by mass, still more preferably 0.6 to 2.5% by mass, and even more preferably 0.9 to 1.9% by mass. When two or more kinds of component (B) are used, the content refers to the total amount thereof.

[0017] Component (C) is one or more selected from the group consisting of the following component (C1) and component (C2), and from the perspective of the temperature stability of the bicontinuous microemulsion structure, it is a polyglycerol fatty acid ester having an HLB or a mixed HLB of 8.0 to 17.0, preferably 9.0 to 16.0, more preferably 10.0 to 14.0, still more preferably 10.0 to 13.0, and even more preferably 10.5 to 12.0. Component (C1): A polyglycerol fatty acid ester composed of a polyglycerol having an average degree of polymerization of 7 to 14 of glycerin and a straight-chain saturated fatty acid having 8 to 12 carbon atoms Component (C2): A polyglycerol fatty acid ester composed of a polyglycerol having an average degree of polymerization of 2 to 3 of glycerin and a straight-chain saturated fatty acid having 8 to 12 carbon atoms

[0018] Examples of component (C1) include heptaglyceryl laurate, decaglyceryl laurate, decaglyceryl dilaurate, tridecaglyceryl caprinate, etc., and heptaglyceryl laurate is preferred.

[0019] Examples of component (C2) include diglyceryl caprinate, diglyceryl laurate, triglycerin dicaprylate, etc., and diglyceryl caprinate is preferred.

[0020] The content of component (C) in the cosmetic composition of the present invention is preferably 1.0 to 10.0% by mass, more preferably 2.0 to 8.0% by mass, even more preferably 3.0 to 7.0% by mass, and even more preferably 3.5 to 6.0% by mass, from the viewpoint of temperature stability of the bicontinuous microemulsion structure. When two or more types of component (C) are used, the content refers to the total amount.

[0021] The average degree of polymerization of polyglycerin in components (A), (B), and (C) is determined from the hydroxyl value based on the following formula. Furthermore, the number of moles of polyglycerin is determined by calculating the molecular weight from the average degree of polymerization and then calculating the number of moles. OHV = 56110(n+2) / (74n+18) OHV: Hydroxyvalue of polyglycerin n: Average degree of polymerization of polyglycerin

[0022] The polyglycerol fatty acid esters of components (A), (B), and (C) can be easily obtained by esterification of polyglycerol and fatty acids by conventional methods, or by addition polymerization of fatty acids and glycidol. The esterification of polyglycerol and fatty acids is not particularly limited, but for example, it can be carried out by heating polyglycerol and fatty acids in the presence of an acid catalyst (phosphoric acid, p-toluenesulfonic acid, etc.) or an alkaline catalyst (caustic soda, etc.), or without a catalyst while removing water, preferably in the range of 100 to 300°C, more preferably 120 to 260°C. The reaction may also be carried out in the presence of an inert gas. The ester thus obtained may be purified according to the purpose. For purification, distillation techniques such as distillation under reduced pressure, molecular distillation, and steam distillation can be used, as well as extraction with organic solvents, fractionation, synthetic adsorbents, and chromatographic separation using a column packed with gel filter media. Alternatively, the desired polyglycerol fatty acid ester may be obtained by using a fatty acid ester instead of fatty acids and performing transesterification with polyglycerol.

[0023] Component (D) is a liquid oil. In this specification, the liquid oil has a viscosity of preferably 1000 mPa·s or less, more preferably 500 mPa·s or less, even more preferably 200 mPa·s or less, and even more preferably 100 mPa·s or less, when measured at 25°C using a B-type viscometer. Examples of liquid oils include hydrocarbon oils, ester oils, acylglycerols, ether oils, animal and vegetable oils, and silicone oils, with hydrocarbon oils, ester oils, ether oils, vegetable oils, and more preferably ester oils.

[0024] Examples of hydrocarbon oils include hydrogenated polyisobutene, liquid paraffin, light liquid isoparaffin, squalane, undecane, tridecane, and isododecane.

[0025] Examples of ester oils include isononyl isononanoate, isostearyl isostearate, cetyl ethylhexanoate, ethylhexyl palmitate, octyldodecyl myristate, isopropyl myristate, propylheptyl caprylate, caprylyl caprylate / caprate, coconut alkyl caprylate / caprate, and dicaprylyl carbonate.

[0026] Examples of acylglycerols include caprylic / capric acid glycerides, caprylic / capric triglycerides, triethylhexanoin, glyceryl triisostearate, and glyceryl diisostearate.

[0027] Examples of ether oils include dicaprylyl ether.

[0028] Examples of animal and vegetable oils include beeswax, avocado oil, almond oil, olive oil, wheat germ oil, rice germ oil, rice bran oil, safflower oil, soybean oil, corn oil, rapeseed oil, palm oil, palm kernel oil, castor oil, sunflower oil, jojoba oil, macadamia nut oil, coconut oil, and lanolin. Preferably, avocado oil, almond oil, olive oil, wheat germ oil, rice germ oil, rice bran oil, safflower oil, soybean oil, corn oil, rapeseed oil, castor oil, sunflower oil, jojoba oil, and macadamia nut oil are used.

[0029] Examples of silicone oils include dimethicone, phenyl trimethicone, cyclomethicone, cyclopentasiloxane, and diphenylsiloxy phenyl trimethicone.

[0030] The content of component (D) in the cosmetic composition of the present invention is preferably 5.0 to 40.0% by mass, more preferably 8.0 to 35.0% by mass, and even more preferably 11.0 to 29.0% by mass, from the viewpoint of temperature stability of the bicontinuous microemulsion structure. When two or more types of component (D) are used, the content refers to the total amount.

[0031] Component (E) is an anionic surfactant. Examples of anionic surfactants include amino acid-based anionic surfactants, higher alcohol-based anionic surfactants, alkylbenzene-based anionic surfactants, alpha-olefin-based anionic surfactants, normal paraffin-based anionic surfactants, and fatty acid-based anionic surfactants, with amino acid-based anionic surfactants being preferred.

[0032] As amino acid-based anionic surfactants, surfactants consisting of amino acid salts to which a fatty acid with 8 to 14 carbon atoms has been added are preferred, and examples include potassium cocoyl glutamate, sodium cocoyl glutamate, TEA cocoyl glutamate, TEA cocoyl alanine, potassium cocoyl glycine, sodium cocoyl methyl alanine, potassium cocoyl taurate, sodium cocoyl methyl taurate, sodium lauroyl glutamate, potassium lauroyl methyl alanine, sodium lauroyl sarcosinate, and potassium myristoyl glutamate. Note that K refers to the potassium salt, Na refers to the sodium salt, and TEA refers to the triethanolamine salt.

[0033] Examples of higher alcohol-based anionic surfactants include sodium laureth-4 carboxylate, sodium laureth sulfate, potassium lauryl sulfate, sodium (C11-15) patheth-3 sulfate, PPG-5 ceteth-10 phosphate, sodium coceth sulfate, sodium lauryl phosphate, and laureth-5 carboxylic acid.

[0034] The content of component (E) in the cosmetic composition of the present invention is preferably 0.01 to 5.0% by mass, more preferably 0.05 to 4.0% by mass, even more preferably 0.3 to 3.0% by mass, and even more preferably 0.5 to 2.5% by mass, from the viewpoint of temperature stability of the bicontinuous microemulsion structure. When two or more types of component (E) are used, the content refers to their total amount.

[0035] Component (F) is a polyhydric alcohol. Examples of polyhydric alcohols include glycerin, diglycerin, ethylhexylglycerin, 1,3-butylene glycol (BG), propylene glycol (PG), propanediol, dipropylene glycol (DPG), pentylene glycol, 1,2-hexanediol, caprylyl glycol, 1,10-decanediol, isopentyldiol, sorbitol, mannitol, maltitol, and xylitol, with glycerin, BG, propanediol, and caprylyl glycol being preferred.

[0036] The content of component (F) in the cosmetic composition of the present invention is preferably 3.0 to 65.0% by mass, more preferably 10.0 to 60.0% by mass, even more preferably 20.0 to 55.0% by mass, and even more preferably 35.0 to 50.0% by mass, from the viewpoint of temperature stability of the bicontinuous microemulsion structure. When two or more types of component (F) are used, the content refers to their total amount.

[0037] Component (G) is water. The content of component (G) in the cosmetic composition of the present invention is preferably 10.0 to 65.0% by mass, more preferably 12.0 to 60.0% by mass.

[0038] The cosmetic composition of the present invention may contain, as appropriate, ingredients commonly used in cosmetics, depending on their use and purpose, as long as they do not impair the effects of the present invention. Examples include, but are not limited to, surfactants other than the above-mentioned ingredients (A), (B), and (C), oils other than ingredient (D), aqueous gelling agents, oily gelling agents, UV absorbers, powders, antioxidants, preservatives, fragrances, colorants, chelating agents, cooling agents, thickeners, plant extracts, vitamins, neutralizing agents, moisturizers, anti-inflammatory agents, pH adjusters, amino acids, etc.

[0039] The cosmetic composition of the present invention can stably maintain a bicontinuous microemulsion structure under the long-term storage conditions described in the examples below, preferably in a wide temperature range such as 25 to 40°C or 5 to 25°C, more preferably 5 to 40°C, and even more preferably -5 to 50°C.

[0040] The cosmetic composition of the present invention can be prepared by heating and mixing the ingredients in any order, stirring and cooling to room temperature.

[0041] The cosmetic composition of the present invention can be used in various cosmetic products, but is particularly suitable for use in cleansing cosmetics, and especially suitable for use in liquid or oil-type cleansing cosmetics. In other words, the present invention also provides cosmetic products containing the cosmetic composition of the present invention.

[0042] The cosmetic composition of the present invention may contain, in addition to the cosmetic composition, various ingredients commonly used in cosmetics, depending on their intended use and purpose. Examples include, but are not limited to, surfactants other than the above-mentioned ingredients (A), (B), and (C), oils other than ingredient (D), aqueous gelling agents, oily gelling agents, UV absorbers, powders, antioxidants, preservatives, fragrances, colorants, chelating agents, cooling agents, thickeners, plant extracts, vitamins, neutralizing agents, moisturizers, anti-inflammatory agents, pH adjusters, amino acids, etc.

[0043] The content of the cosmetic composition in the cosmetic composition of the present invention is not particularly limited, but from the viewpoint of temperature stability of the bicontinuous microemulsion structure, it is preferably 10 to 100% by mass, more preferably 20 to 100% by mass, and even more preferably 50 to 100% by mass. [Examples]

[0044] The present invention will be specifically described below with reference to examples, but the present invention is not limited in any way by these examples. Unless otherwise specified, "%" means "mass%".

[0045] <Preparation of cosmetic compositions> Examples 1-36 and Comparative Examples 1-18 Components (A) to (F) listed in Tables 1 to 6 were heated and dissolved at 70°C in the compositions shown in the tables. Then, component (G) and other components were added, and the mixture was cooled to room temperature while stirring to prepare 100 g of cosmetic composition. In Table 6, "A'" refers to nonionic surfactants other than components (A) to (C), and "B'" refers to amphoteric surfactants.

[0046] The details of the components used in Tables 1-6 are shown below. Each polyglycerol fatty acid ester was synthesized by known methods. The viscosity of the liquid oil was measured at 25°C using a B-type viscometer. Isononyl isononanoate...Sarakos 99 (manufactured by Nisshin Oillio Co., Ltd.) (8 mPa·s) Squalane...Phytosqualane (manufactured by SOPHIM) (40 mPa·s) Dicaprylyl ether...Cetiol OE Deo C (manufactured by BASF Japan) (5 mPa·s) Olive oil... Kuropure OL (manufactured by Croda Japan Co., Ltd.) (67 mPa·s) Diphenylsiloxyphenyl trimethicone...KF-56A (manufactured by Shin-Etsu Chemical Co., Ltd.) (15 mPa·s) Potassium cocoyl glutamate... Amisoft CK-22 (manufactured by Ajinomoto Co., Inc.) Sodium Cocoyl Glutamate... Amisoft CS-11 (manufactured by Ajinomoto Co., Inc.) TEA-Cocoyl Glutamate... Amisoft CT-12 (manufactured by Ajinomoto Co., Inc.) Cocoyl Alanine TEA... Amisoft ACT-12 (manufactured by Ajinomoto Co., Inc.) Sodium laureth sulfate... Emal 327 (manufactured by Kao Corporation) Glycerin... Concentrated glycerin for cosmetics (manufactured by Kao Corporation) BG···1,3-Butanediol (for cosmetic use) (manufactured by Daicel Corporation) Propanediol... Zemea Select Propanediol (manufactured by DuPont Tate & Lyle Bio Products) Caprylyl glycol... Adekanol OG (manufactured by ADEKA)

[0047] The cosmetic compositions obtained in each example and comparative example were evaluated for temperature stability (presence or absence of separation, dyeing method), refreshing feeling upon rinsing, and eye irritation according to the following criteria. The results are shown in Tables 1 to 6. A composition having a stable bicontinuous microemulsion structure is defined as one that does not separate after one month of storage and uniformly dyes both water-soluble and oil-soluble dyes when added.

[0048] <Presence or absence of separation (appearance)> For each example and comparative example, 10g portions of the cosmetic composition were divided into five 20mL glass bottles with lids (55mm total length, 27mm diameter). One day after preparation, the presence or absence of separation was visually confirmed and evaluated according to the following criteria. Furthermore, for samples that received a "◎" in the staining method (room temperature) confirmation one day after preparation, each sample was stored by standing one by one in four constant temperature baths at -5℃, 5℃, 40℃, and 50℃, and in a room temperature (25℃) environment. One month after the start of storage, the presence or absence of separation was visually confirmed and evaluated according to the following criteria. Samples in which separation was observed were excluded from the staining method evaluation and are indicated with "-" in the table. These samples were also not stored. (Evaluation Criteria) ◎: Not separated ×: Separated

[0049] <Staining method> A bicontinuous microemulsion structure refers to a structure in which the oil phase and the aqueous phase are continuous. By adding a water-soluble dye and an oil-soluble dye to a sample, and observing that both dyes stain the sample uniformly, it can be confirmed that the sample has a bicontinuous microemulsion structure. The method of confirming a bicontinuous microemulsion structure by staining a sample is called staining. For each example and comparative example of cosmetic composition, samples stored at each temperature that showed no separation after one month of storage (◎) were divided into two 6 mL glass bottles with lids (40 mm total length, 18 mm body diameter), with 5 g of each sample being placed in each bottle. Water-soluble dyes and oil-soluble dyes were then added to each bottle. Subsequently, the samples with added dyes were stored again in a constant temperature bath at each temperature or at room temperature and evaluated according to the following criteria. Note that "-" in the table indicates that the sample was not subject to evaluation. (Evaluation Criteria) ◎: Both dyes were evenly distributed. ×: At least one dye did not stain evenly.

[0050] <Evaluation of temperature stability of bicontinuous microemulsion structures> The number of samples at each temperature that received a "◎" rating in the staining method performed one month after storage was totaled, and a rating of ◎, ○, △, or × was determined according to the following criteria. A "-" in the table indicates that the sample was not included in the evaluation. ◎: The dyeing results were excellent at four or more temperatures, including room temperature. ○: The dyeing results were excellent at three temperatures, including room temperature. △: The dyeing results were excellent at two temperatures, including room temperature. ×: The dyeing results were excellent at one or fewer temperatures, including room temperature.

[0051] For each example and comparative example of cosmetic composition, samples that showed no separation after one month of storage at room temperature were evaluated by 13 expert panelists based on their refreshing feeling upon rinsing. An appropriate amount of the sample was applied to the back of the hand, and the skin feel immediately after rinsing with water was evaluated according to the following criteria. An overall evaluation was also performed based on the number of ○ marks in the evaluation results. Note that "-" in the table indicates that the sample was not evaluated. (Evaluation Criteria) ○: Refreshing △: Can't say either way ×: Not refreshing (comprehensive evaluation) 3: More than 10 out of 13 people answered ○ 2: Out of 13 people, 8-9 answered ○ 1: Out of 13 people, 7 or fewer answered ○.

[0052] <Evaluation of eye irritation> For each example and comparative example of cosmetic composition, samples that showed no separation after one month of storage at room temperature were evaluated for eye irritation by 13 expert panelists. An appropriate amount of the sample was applied around the eye and evaluated according to the following criteria. An overall evaluation was also performed based on the number of ○ marks in the evaluation results. Note that "-" in the table indicates that the sample was not evaluated. (Evaluation Criteria) ○: My eyes don't hurt. △: Can't say either way ×: My eyes hurt (comprehensive evaluation) 3: More than 10 out of 13 people answered ○ 2: Out of 13 people, 8-9 answered ○ 1: Out of 13 people, 7 or fewer answered ○.

[0053] [Table 1]

[0054] [Table 2]

[0055] [Table 3]

[0056] [Table 4]

[0057] [Table 5]

[0058] [Table 6]

[0059] As can be seen from Tables 1 to 6, the cosmetic compositions of each example all exhibited excellent temperature stability, a refreshing feeling upon rinsing, and reduced eye irritation. On the other hand, Comparative Example 1, which did not contain some of the components of the present invention, and Comparative Examples 16 to 18, which were reproductions of conventional products, had a bicontinuous microemulsion structure, but after one month of storage, the structure was only maintained at room temperature, indicating problems with temperature stability, and they also tended to be inferior in terms of eye irritation. Furthermore, Comparative Examples 2 to 15 did not have a bicontinuous microemulsion structure one day after preparation. Comparative Example 12 was a reproduction of Patent Document 1, Comparative Example 13 of Patent Document 2, Comparative Example 14 of Patent Document 3, Comparative Example 15 of Patent Document 4, Comparative Example 16 of Patent Document 5, Comparative Example 17 of Patent Document 6, and Comparative Example 18 of Patent Document 7.

[0060] (Example prescription) The following are examples of cosmetic formulations of the present invention. The present invention is not limited in any way by these examples. All amounts are expressed as mass % of the total product amount.

[0061] [Table 7]

[0062] [Table 8]

[0063] [Table 9]

[0064] [Table 10]

[0065] [Table 11] [Industrial applicability]

[0066] The cosmetic composition of the present invention can be suitably used in cosmetics.

Claims

1. A cosmetic composition comprising the following components (A) to (G), wherein the mixed HLB of component (A) and component (B) is 6.5 to 13.0, the content of component (A) is 5.0 to 15.0% by mass, the content of component (B) is 0.1 to 5.0% by mass, the content of component (C) is 3.0 to 10.0% by mass, the content of component (D) is 11.0 to 29.0% by mass, and component (E) comprises one or more selected from the group consisting of amino acid-based anionic surfactants. Component (A): Polyglycerin fatty acid ester consisting of branched-chain and / or unsaturated fatty acids and polyglycerin with an average degree of polymerization of 7 to 14. Component (B): Polyglycerin fatty acid ester consisting of branched-chain and / or unsaturated fatty acids and polyglycerin with an average degree of polymerization of 2 to 3. Component (C): One or more polyglycerol fatty acid esters selected from the group consisting of the following components (C1) and (C2), with an HLB or mixed HLB of 8.0 to 17.

0. Component (C1): Polyglycerin fatty acid ester consisting of a straight-chain saturated fatty acid with 8 to 12 carbon atoms and polyglycerin with an average degree of polymerization of 7 to 14. Component (C2): Polyglycerin fatty acid ester consisting of a straight-chain saturated fatty acid with 8 to 12 carbon atoms and polyglycerin with an average degree of polymerization of 2 to 3. Ingredient (D): Liquid oil Ingredient (E): Anionic surfactant Ingredient (F): Polyhydric alcohol Ingredient (G): Water

2. The cosmetic composition according to claim 1, wherein component (D) comprises one or more selected from the group consisting of hydrocarbon oils, ester oils, ether oils, vegetable oils, and silicone oils.

3. The cosmetic composition according to claim 1 or 2, wherein component (D) contains an ester oil.

4. The cosmetic composition according to any one of claims 1 to 3, wherein component (E) comprises a surfactant consisting of an amino acid salt to which a fatty acid having 8 to 14 carbon atoms has been added.

5. A cosmetic containing the cosmetic composition described in any one of claims 1 to 4.

6. The cosmetic composition according to claim 5, which is a cleansing cosmetic composition.

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