Cleansing Composition

Abstract

To provide a cleansing composition that has a bicontinuous structure and is excellent in use feeling (moist feeling), washability, and high-temperature stability.SOLUTION: A cleansing composition having a bicontinuous structure, contains following components: (A) polyoxyethylene glyceryl isostearate; (B) polyoxyethylene (caprylate / caprate) glycerides; (C) liquid oil; (D) an alcohol having a valence of three or more; (E) a divalent alcohol; and (F) water, the content of the component (D) being 20 mass% or more.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a cleansing composition. [Background technology]

[0002] Cleansing cosmetics are classified into oil-based ones that remove makeup cosmetics such as foundation and lip color, and water-based ones that remove dirt such as sebum. Oil-based cleansing cosmetics are compatible with oily dirt such as foundation, lipstick, mascara, and eye shadow remaining on the skin and can effectively remove it, but they have the drawback of leaving a sticky or slimy feeling even after wiping it off after use, and in some cases, requiring further washing with soap or the like, which is time-consuming. On the other hand, water-based cleansing cosmetics have a refreshing feel when used, but have the drawback of being poor in removing dirt.

[0003] In response to these problems, cleansing cosmetics with a bicontinuous structure have been proposed in recent years (for example, Patent Documents 1 to 4). In cleansing cosmetics with a bicontinuous structure, an oil phase consisting of oily components and an aqueous phase consisting of aqueous components form a continuous phase. This allows them to blend well with oily stains caused by makeup cosmetics and the like, and also blend well with water or hot water. Therefore, it is believed that by applying the cleansing cosmetics to the skin, allowing them to blend with stains such as makeup cosmetics, and then rinsing them off with water or hot water, the stains can be effectively removed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-147765 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-178930 [Patent Document 3] Japanese Patent Application Laid-Open No. 2017-066085 [Patent Document 4] Japanese Patent Application Publication No. 2018-172362 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the case of cleansing compositions such as those described in Patent Documents 1 to 4, there are limitations on the blending of ingredients required for achieving a transparent appearance and forming a bicontinuous structure, and there is a problem in that it is not easy to achieve stability at high temperatures while ensuring a moist feeling in use and cleansing properties. Specifically, for example, Patent Document 1 states that blending a trihydric or higher alcohol imparts a moist feeling to the skin after rinsing and improves the feel in use, but blending 20% ​​by mass or more of a trihydric or higher alcohol prevents the formation of a bicontinuous structure, leaving room for improvement in the feel in use, the formation of a bicontinuous structure, and stability at high temperatures.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cleansing composition that is transparent in appearance, has a bicontinuous structure, and is excellent in usability (moist feeling), cleansing properties, and stability at high temperatures. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention has the following features.

[0008] A cleansing composition having a bicontinuous structure, Ingredients: (A) Polyoxyethylene glyceryl isostearate; (B) (Caprylic / capric) polyoxyethylene glycerides; (C) liquid oil; (D) Trihydric or higher alcohols; (E) a dihydric alcohol; and (F)Water and the content of the component (D) is 20 mass % or more. [Effects of the Invention]

[0009] The cleansing composition of the present invention has a transparent appearance without separation or cloudiness, has a bicontinuous structure, and is excellent in feel (moist feeling) when used, cleansing properties, and stability at high temperatures. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, one embodiment of the cleansing composition of the present invention will be described.

[0011] The cleansing composition of the present invention has a bicontinuous structure, Ingredients: (A) Polyoxyethylene glyceryl isostearate; (B) (Caprylic / capric) polyoxyethylene glycerides; (C) liquid oil; (D) Trihydric or higher alcohols; (E) a dihydric alcohol; and (F)Water Includes:

[0012] Here, the "bicontinuous structure" refers to a microemulsion in which both the oil layer and the water layer are continuous phases, and which is optically isotropic, transparent or translucent.

[0013] Furthermore, by observing using an electron microscope using the freeze-fracture replica method, it is possible to obtain an image in which the aqueous and oil phases form a continuous phase. Specifically, a structure in which rounded areas and slightly flat areas are intertwined in a network-like pattern, or a randomly connected layered structure, can be seen. This observation confirms that this is not a microemulsion in which only the aqueous or oil phase forms the continuous phase.

[0014] Furthermore, the simplest method for confirming the presence of a bicontinuous structure is to take advantage of the fact that the aqueous phase and the oil phase form continuous phases, by dropping a solution of a water-soluble dye dissolved in water and a solution of an oil-soluble dye dissolved in oil onto a composition that has been left to stand, and observing the coloring state of the composition. When the aqueous phase forms the continuous phase, infiltration of the water-soluble dye solution is observed. When the oil phase forms the continuous phase, infiltration of the oil-soluble dye solution is observed. In a composition with a bicontinuous structure, infiltration of both the water-soluble dye solution and the oil-soluble dye solution is observed.

[0015] Due to its bicontinuous structure, the cleansing composition of the present invention has excellent detergency against oily stains (lipstick, mascara, etc.), and because the water layer is a continuous phase, it has an excellent feel after use, with little stickiness or stickiness even after rinsing with water or hot water.

[0016] The polyoxyethylene glyceryl isostearate of component (A) is a monoester type, and specific examples thereof include one or more of PEG-5 glyceryl isostearate, PEG-8 glyceryl isostearate, PEG-10 glyceryl isostearate, PEG-15 glyceryl isostearate, PEG-20 glyceryl isostearate, PEG-25 glyceryl isostearate, PEG-30 glyceryl isostearate, PEG-40 glyceryl isostearate, PEG-50 glyceryl isostearate, PEG-60 glyceryl isostearate, and PEG-80 glyceryl isostearate.

[0017] The number of moles of ethylene oxide added in component (A) is not particularly limited and can be, for example, in the range of 1 to 80 moles. However, from the viewpoints of cleanability, formation of a bicontinuous structure, transparency of the composition, etc., the number of moles of ethylene oxide added is preferably 5 to 30 moles.

[0018] In addition, component (A) is (a1) polyoxyethylene glyceryl isostearate having an added mole number of ethylene oxide of 1 to 10 moles, and It is preferable to use (a2) polyoxyethylene glyceryl isostearate having an added mole number of ethylene oxide of 11 to 80 moles in combination. By using the above (a1) and (a2) in combination as component (A), the stability of the composition at high and low temperatures can be improved. In this case, it is preferable to use 5 to 10 moles of (a1) and 15 to 30 moles of (a2). The mass ratio ((a1) / (a2)) is more preferably 1 to 13, and even more preferably 8 to 12.

[0019] Furthermore, when (a1) and (a2) are used in combination, there are no particular limitations on the combination. For example, it is more preferable to use PEG-8 glyceryl isostearate as (a1) and PEG-20 glyceryl isostearate as (a2) in combination.

[0020] The amount of component (A) in the composition can be, for example, in the range of 1 to 30% by mass. From the viewpoints of the appearance, cleansing properties, and bicontinuous structure formation of the cleansing composition, it is preferably 2 to 26% by mass, and from the viewpoint of improving stability at high and low temperatures, it is more preferably 18 to 26% by mass.

[0021] The (caprylic / capric) polyoxyethylene glycerides of component (B) are monoester types, and specific examples thereof include one or more of (caprylic / capric) PEG-4 glycerides, (caprylic / capric) PEG-6 glycerides, (caprylic / capric) PEG-7 glycerides, (caprylic / capric) PEG-8 glycerides, (caprylic / capric) PEG-15 glycerides, and (caprylic / capric) PEG-20 glycerides.

[0022] The number of moles of ethylene oxide added in component (B) is not particularly limited and can be, for example, in the range of 4 to 20 moles. However, from the viewpoint of forming a bicontinuous structure, (caprylic / capric) PEG-6 glycerides, (caprylic / capric) PEG-7 glycerides, and (caprylic / capric) PEG-8 glycerides, in which the number of moles of ethylene oxide added is 6 to 8, are preferred.

[0023] The amount of component (B) in the composition is not particularly limited, but can be, for example, in the range of 2 to 20% by mass, and from the viewpoints of the appearance of the cleansing composition, cleansing properties, and formation of a bicontinuous structure, it is preferably 4 to 18% by mass.

[0024] The liquid oil of component (C) refers to one that is liquid at room temperature (5 to 35°C). When two or more types are mixed, the mixture should be liquid, and from the viewpoint of dissolving and cleaning oily stains, it is preferable that the mixture is liquid at 25°C.

[0025] The liquid oil is not particularly limited as long as it can be incorporated into the cleansing composition, but examples include one or more of animal and vegetable oils, ester oils, silicone oils, hydrocarbon oils, waxes, higher alcohols, and higher fatty acids.

[0026] The animal and vegetable oils are not particularly limited, but examples include one or more of lard, fish oil, squalane, macadamia nut oil, eucalyptus oil, coconut oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, shea butter, cacao butter, almond oil, sunflower oil, rosehip oil, olive squalane, camellia oil, kiwi fruit seed oil, camellia oil, apricot kernel oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, meadowfoam oil, peppermint oil, argan oil, carrot oil, lavender oil, sugar squalane, damask rose flower wax, rosa centifolia flower wax, jasmine flower wax, camellia oil, and hydrogenated versions thereof (e.g., hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, hydrogenated soybean oil, etc.).

[0027] Examples of ester oils include esters of fatty acids having 1 to 22 carbon atoms and alcohols having 1 to 22 carbon atoms, and are not particularly limited thereto. Examples thereof include ethyl oleate, 2-ethylhexyl oleate, butyl oleate, decyl oleate, cetyl oleate, ethyl olivate, 2-ethylhexyl olivate, decyl olivate, isopropyl myristate, isopropyl palmitate, myristyl myristate, ethyl palmitate, isopropyl palmitate, cetyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, isostearyl isostearate, ethyl isostearate, 2-ethylhexyl isostearate, isopropyl isostearate, isobutyl isostearate, isocetyl isostearate, decyl isostearate, propylene glycol isostearate, cetyl 2-ethylhexanoate, tri-2-ethyl Examples of the glyceryl triisostearate include one or more of glyceryl hexanoate, caprylic / capric triglyceride, glyceryl triisostearate, isononyl isononanoate, diisopropyl adipate, pentaerythrityl tetraoctanoate, pentaerythrityl tetraisostearate, diisostearyl malate, erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate, dipentaerythrityl hexa(hydroxystearate / stearic acid / rosin acid), dipentaerythrityl tetra(hydroxystearate / isostearate), dipentaerythrityl hexahydroxystearate, glyceryl (ethylhexanoate / stearic acid / adipic acid), glyceryl tri(caprylic acid / capric acid / myristic acid / stearic acid), dipentaerythrityl hexa(behenate / benzoate / ethylhexanoate), and alkyl benzoate.

[0028] The silicone oil is not particularly limited, and examples thereof include one or more of dimethyl silicone oils such as methyl polysiloxane and highly polymerized methyl polysiloxane; methyl phenyl silicone oils such as methyl phenyl polysiloxane; cyclic silicone oils such as methyl cyclopolysiloxane, octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, and dodecamethyl cyclohexasiloxane; amino-modified silicones such as aminopropyl methyl siloxane-dimethyl siloxane copolymer, aminoethyl aminopropyl siloxane-dimethyl siloxane copolymer, and aminoethyl aminopropyl methyl siloxane-dimethyl siloxane copolymer; modified silicones such as carboxy-modified silicones, fatty acid-modified silicones, alcohol-modified silicones, aliphatic alcohol-modified silicones, epoxy-modified silicones, fluorine-modified silicones, and alkyl-modified silicones; methyl hydrogen polysiloxane, dimethiconol, and the like.

[0029] Examples of hydrocarbon oils include one or more of liquid paraffin, liquid isoparaffin, mineral oil, isododecane, α-olefin oligomer, petrolatum, isoparaffin, light isoparaffin, light liquid isoparaffin, squalane, synthetic squalane, vegetable squalane, hydrogenated polyisobutene, and hydrogenated (tetradecenyl / methylpentadecene).

[0030] The wax is not particularly limited, but examples thereof include one or more of carnauba wax, candelilla wax, beeswax, rice bran wax, shellac wax, spermaceti, lanolin, sunflower seed wax, and the like.

[0031] Examples of higher alcohols include aliphatic alcohols having 12 to 24 carbon atoms that are poorly soluble in water, and are not particularly limited. Examples include one or more of lauryl alcohol, myristyl alcohol, cetyl alcohol (cetanol), stearyl alcohol, cetearyl alcohol, isostearyl alcohol, hexyldecanol, 2-octyldodecanol, oleyl alcohol, decyltetradecanol, and behenyl alcohol.

[0032] Examples of higher fatty acids include fatty acids having 12 to 24 carbon atoms that are poorly soluble in water, and are not particularly limited, but examples include one or more of lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, and behenic acid.

[0033] As the liquid oil of component (C), it is preferable to use an ester oil or a hydrocarbon oil from the viewpoint of stability at high and low temperatures. Among ester oils, 2-ethylhexyl palmitate and cetyl 2-ethylhexanoate are more preferable, and among hydrocarbon oils, liquid paraffin and isododecane are more preferable. In particular, it is preferable to use an ester oil in combination with a hydrocarbon oil, more preferably a combination of 2-ethylhexyl palmitate or cetyl 2-ethylhexanoate with liquid paraffin or isododecane, and even more preferably a combination of 2-ethylhexyl hexanoate with liquid paraffin. This can improve cleaning properties and stability at high and low temperatures.

[0034] The amount of component (C) in the composition is not particularly limited, and although it depends on the amount of water in components (A), (B), and (F), it can be in the range of 5 to 25 mass%, for example. From the viewpoint of cleansing properties, it is preferably 10 to 20 mass%, and more preferably 15 to 20 mass%. When an ester oil and a hydrocarbon oil are used in combination as the liquid oil of component (C), the mass ratio (ester oil / hydrocarbon oil) is preferably 0.1 to 7.

[0035] The trihydric or higher alcohol of component (D) is not particularly limited, and examples thereof include one or more of glycerin derivatives such as glycerin and diglycerin; sugars such as sorbitol, maltitol, maltose, fructose, xylitol, maltotriose, threitol, erythritol, and glucose; and glucose derivatives such as methyl glucoside and ethyl glucoside. Among these, glycerin is preferred because it can impart a moderate moist feeling, is liquid at room temperature, and has good operability.

[0036] The amount of component (D) in the composition is 20% by mass or more, which gives the cleansing composition an excellent feel when used, such as a moist feeling on the skin after use. From the viewpoints of the formation of a bicontinuous structure, the appearance of the composition, and its stability, the amount of component (D) in the composition is preferably 20 to 40% by mass, and more preferably 20 to 30% by mass.

[0037] The dihydric alcohol of component (E) is not particularly limited, but examples thereof include dipropylene glycol, 1,3-propylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,2-pentylene glycol, 1,2-hexylene glycol, etc. Among these, 1,3-butylene glycol is preferred.

[0038] The amount of component (E) added to the composition is not particularly limited, but can be, for example, in the range of 1 to 30% by mass, and preferably in the range of 1 to 10% by mass.

[0039] The water of component (F) is not particularly limited as long as it can be used in cosmetics, but examples include purified water, ion-exchanged water, distilled water, natural water, deep-sea water, hydrogen water, RO water, sterilized water, and tap water.

[0040] Furthermore, the cleansing composition of the present invention can contain a nonionic surfactant (component (G)) other than components (A) and (B). The inclusion of component (G) can improve cleansing properties and stability at high and low temperatures.

[0041] Specifically, the component (G) is not particularly limited, but preferred examples include tri-fatty acid polyoxyethylene glyceryl and coconut oil fatty acid polyoxyethylene glyceryl.

[0042] As the tri-fatty acid polyoxyethylene glyceryl, polyoxyethylene glyceryl triisostearate is particularly preferred, and specific examples include PEG-5 glyceryl triisostearate, PEG-10 glyceryl triisostearate, PEG-15 glyceryl triisostearate, PEG-20 glyceryl triisostearate, PEG-30 glyceryl triisostearate, etc.

[0043] The coconut oil fatty acid polyoxyethylene glyceryl is a monoester type, and specific examples thereof include coconut oil fatty acid PEG-3 glyceryl, coconut oil fatty acid PEG-7 glyceryl, coconut oil fatty acid PEG-30 glyceryl, and the like.

[0044] Among these, it is more preferable that component (G) be PEG-20 glyceryl triisostearate, PEG-7 glyceryl coconut oil fatty acid, or the like.

[0045] When component (G) is not blended into the cleansing composition, from the viewpoint of cleansing performance, the mass ratio of component (C) to the total of components (A) and (B) (component (C) / (component (A)+component (B)) is preferably 0.1 to 0.8, and more preferably 0.3 to 0.8.

[0046] On the other hand, when component (G) is added, from the viewpoint of cleansing properties, the mass ratio of component (C) to the total of components (A), (B), and (G) [component (C) / (component (A) + component (B) + component (G))] is preferably 0.1 to 0.8, and more preferably 0.3 to 0.8.

[0047] In addition to components (A) to (G), the cleansing composition of the present invention may also contain other components commonly used in cleansing cosmetics, such as anionic surfactants, cationic surfactants, amphoteric surfactants, clay minerals, thickeners such as water-soluble polysaccharides, inorganic pigments, disinfectants, moisturizers, humectants, colorants, preservatives, texture improvers, fragrances, anti-inflammatory agents, whitening agents, antiperspirants, ultraviolet absorbers, antioxidants, and various extracts.

[0048] Furthermore, the method for producing the cleansing composition of the present invention is not particularly limited, but it can be produced, for example, by mixing and stirring a mixture of components (A) to (C) and component (G) with a mixture of components (D) to (F).

[0049] The cleansing composition of the present invention has a bicontinuous structure, Ingredients: (A) Polyoxyethylene glyceryl isostearate; (B) (Caprylic / capric) polyoxyethylene glycerides; (C) liquid oil; (D) Trihydric or higher alcohols; (E) a dihydric alcohol; and (F)Water and the content of the component (D) is 20% by mass or more. Therefore, the cleansing composition of the present invention has a transparent appearance and is excellent in feel (moist feeling) when used, cleansing properties, and stability at high temperatures.

[0050] Furthermore, for example, by blending component (G), by using (a1) and (a2) in combination as component (A), or by using an ester oil and a hydrocarbon oil in combination as component (C), it is possible to improve the detergency and stability at high and low temperatures.

[0051] Regarding stability at low temperatures, for example, when the cleansing composition of the present invention is stored at −5°C, it may freeze depending on the ratio of each component. However, when the composition is returned to room temperature and stirred, it regains its transparent appearance, and can maintain its transparent appearance even when stored at low temperatures and returned to room temperature.

[0052] The cleansing composition of the present invention is not limited to the above embodiments. [Example]

[0053] The present invention will be explained in more detail below with reference to examples, but the present invention is not limited to these examples. The blending amounts shown in Tables 1 to 4 are expressed in mass % (active component).

[0054] <Preparation of Cleansing Composition> The cleansing compositions of Examples and Comparative Examples were prepared according to the following procedure.

[0055] Components (A) to (C) and (G) were mixed uniformly at room temperature, to which components (D) to (F) were added at room temperature, followed by stirring for 10 minutes to mix uniformly.

[0056] <Ingredients> The components shown in Tables 1 to 4 were as follows: Ingredient (A) (a1) PEG-8 glyceryl isostearate: M Fine Oil ISG-8M (Miyoshi Oil & Fats) (a2) PEG-20 glyceryl isostearate: M Fine Oil ISG-20M (Miyoshi Oil & Fats) ·Component (B) (Caprylic / Capric) PEG-8 Glycerides: M Fine Oil MCG-8M (Miyoshi Oil & Fat) (Caprylic / capric acid) PEG-6 glycerides: those synthesized by a general method were used. ·Component (C) 2-Ethylhexyl palmitate: PALMESTER 1543 (Palm Oleo) 2-Cetyl ethylhexanoate: M Fine Oil EHC (Miyoshi Oil & Fat) Liquid paraffin: Moresco White P-70 (MORESCO) Isododecane: Marukasol R (Maruzen Petrochemicals) ·Component (D) Glycerin: Cosmetic grade concentrated glycerin (Miyoshi Oil & Fat) ·Component (E) 1,3-Butylene glycol (1,3-BG): Daicel ·Ingredients (G) PEG-20 glyceryl triisostearate: M Fine Oil ISG-20T (Miyoshi Oil & Fats) Coconut oil fatty acid PEG-7 glyceryl: M Fine Oil COG-7M (Miyoshi Oil & Fat)

[0057] <Evaluation method> (1) Appearance After preparing the cleansing compositions, they were placed in a transparent glass container and allowed to stand at 25°C for one day, after which they were visually evaluated according to the following criteria. Compositions that were separated or cloudy in appearance did not have a bicontinuous structure, and therefore were not subjected to further evaluation. 4: Colorless and transparent 3: Slightly fluorescent and bluish transparent 2: Fluorescent transparent 1: Separation / cloudiness

[0058] (2) Bicontinuous structure confirmation test FAT RED 5B02 (manufactured by Clariant Japan) was used as the oil-soluble dye. A 0.1% liquid paraffin solution of FAT RED 5B02 was used as the oil-based staining solution. Food Blue No. 1 (manufactured by Benifuji Chemical Industry Co., Ltd.) was used as the water-soluble dye. A 0.1% aqueous solution of Food Blue No. 1 was used as the aqueous staining solution. Approximately 0.03 g of each dye was added to approximately 3 g of the cleansing composition, and the mixture was shaken and stirred. The penetration of the dye was visually evaluated according to the following criteria. bc (bicontinuous structure): After shaking and stirring, infiltration of both water-soluble and oil-soluble dyes was observed, and it was determined to be a bicontinuous structure. - (o / w or w / o emulsion): After shaking and stirring, infiltration of either the water-soluble dye or the oil-soluble dye was observed, but infiltration of the other was not observed, and it was determined to be an o / w or w / o emulsion.

[0059] (3) Cleanability Polyethylene surgical tape (Keeppore, manufactured by Nichiban) was attached to a glass slide, and about 0.01 g of lipstick was applied and allowed to dry at room temperature for one hour. After drying, the tape was immersed in each cleansing composition and allowed to stand for one hour. After standing, the tape was removed from the cleansing composition, and the lipstick-applied area was rubbed back and forth 20 times, and then rinsed with running water until the cleansing composition was removed. After rinsing, the amount of lipstick remaining on the tape was visually evaluated according to the following criteria. 4: Very good fallout 3: Good fall 2: Some dirt remains 1: Doesn't come off at all

[0060] (4) Feeling of use (moisturizing) Ten panelists applied 1 g of the cleansing composition of the example to the back of their hands, spread it, and then rinsed it off with running water until the cleansing composition was removed, and evaluated the moist feeling of the skin after rinsing.

[0061] Compared with the test of Comparative Example 6 conducted in the same manner, the number of people who responded that they felt a stronger moist feeling was evaluated according to the following criteria. 〇: More than 7 out of 10 panelists felt a strong moist feeling △: 4 to 6 out of 10 panelists felt a strong moist feeling ×: Of the 10 panelists, 3 or less felt a strong moist feeling The evaluation panel that evaluated the moisturizing sensation described above used 20 pairs of compositions with different moisturizing sensations and conducted a one-to-two test (a duo-trio test in which three samples are presented against two types of samples, with one sample presented as a standard sample and participants selecting the one that matches the standard sample), and selected participants with a correct answer rate of 70% or higher. Before conducting the evaluation, the entire panel discussed and adjusted the characteristics of each evaluation item to ensure that each panelist had a common understanding. Furthermore, to eliminate panel bias in the sensory evaluation and increase the accuracy of the evaluation, the test group numbers and contents of the samples were not disclosed to the panelists, and the samples were presented randomly.

[0062] (5) 50℃ stability The cleansing composition was placed in a transparent vial and stored in a thermostatic chamber at 50° C. The sample was taken out every week, and the appearance was visually evaluated according to the following criteria. 6: Maintained a clear appearance for more than three months 5: Maintained a clear appearance for more than two months but less than three months 4: Maintained a clear appearance for more than one month but less than two months 3: Maintained a transparent appearance for more than two weeks but less than one month 2: Maintained a clear appearance for more than one week but less than two weeks 1: Separation or cloudiness occurred within one week

[0063] (6)-5℃ stability The cleansing composition was placed in a transparent vial and stored in a thermostatic chamber at −5° C. The sample was taken out every week, and the frozen sample was left to stand until it returned to room temperature, then shaken and stirred, and the appearance was visually evaluated according to the following criteria. 6: Maintained a clear appearance for more than three months 5: Maintained a clear appearance for more than two months but less than three months 4: Maintained a clear appearance for more than one month but less than two months 3: Maintained a transparent appearance for more than two weeks but less than one month 2: Maintained a clear appearance for more than one week but less than two weeks 1: Separation or cloudiness occurred within one week

[0064] <Result> The results are shown in Tables 1 to 5.

[0065] [Table 1]

[0066] [Table 2]

[0067] [Table 3]

[0068] [Table 4]

[0069] [Table 5]

[0070] The cleansing compositions of Examples 1 to 50 were all transparent in appearance (25°C), had a bicontinuous structure (bc), had good cleansing properties and moisturizing properties, and were stable for more than one week at high (50°C) and low (-5°C) temperatures.

[0071] As in Comparative Examples 1, 2, 4, and 5, compositions that did not contain any of components (A), (B), (D), or (E) showed separation or clouding in appearance (25°C) and did not form a bicontinuous structure. As in Comparative Example 3, a composition that did not contain component (A) but contained component (G) formed a bicontinuous structure, but showed separation and clouding in appearance at 50°C. As in Comparative Examples 6 and 7, compositions that contained components (A) to (F) but contained less than 20% by mass of component (D) showed separation or clouding in appearance (25°C) and did not form a bicontinuous structure, or formed a bicontinuous structure but provided insufficient moisturizing sensation. Furthermore, as in Comparative Example 8, a composition that did not contain component (B) and contained less than 20% by mass of component (D) formed a bicontinuous structure, but was found to have insufficient cleansing properties, moisturizing sensation, and high-temperature stability.

[0072] Among Examples 1 to 12, Examples 1 to 11, in which the mass ratio of component (C) to the total of component (A) and component (B) (component (C) / (component (A)+component (B))) was 0.3 or more, were confirmed to have better cleaning properties than Example 12. Among Examples 1 to 12 and 45, it was confirmed that Examples 1, 2, and 4 to 12, in which the component (A) was 18 to 26 mass %, were superior to Examples 3 and 45 in stability at high and low temperatures. Among Examples 1, 2, 4 to 12, 46 and 47, it was confirmed that Examples 1, 2, 4 to 12, in which the component (B) was 4 to 18 mass %, were superior to Examples 46 and 47 in low temperature stability.

[0073] As shown in Table 3, Examples 13 to 22, which contained polyoxyethylene glyceryl triisostearate as component (G), and Examples 23 to 29, which contained polyoxyethylene glyceryl coconut oil fatty acid, were superior in cleansing properties and stability at high temperatures compared to Examples 1 to 12. In addition, the appearance remained more transparent at low temperatures for more than two weeks, demonstrating good low-temperature stability. Among Examples 13 to 29, Examples 13 to 26, 28, and 29, in which the mass ratio of component (C) to the total of component (A) and component (B) (component (C) / (component (A) + component (B))) was 0.3 or more, were confirmed to have superior cleaning properties compared to Example 27.

[0074] As shown in Table 4, it was confirmed that in Examples 30 to 42, 49, and 50, the combined use of (a1) and (a2) as component (A) resulted in excellent stability at high temperatures (50°C) and also at low temperatures (-5°C). This is advantageous because it allows the cleansing composition to maintain its external transparency even in high- and low-temperature environments during storage and transportation.

[0075] Furthermore, it was confirmed that when component (C) is a mixture of ester oil and hydrocarbon oil as in Examples 31 to 34, 36, 38, 40, 42, 49, and 50, the stability at high and low temperatures is further improved.

[0076] Table 5 systematically shows the combinations of components (A), (B), (G), and (C), and shows that the addition of component (G) and the combined use of (a1) and (a2) as component (A) improves detergency and stability at high and low temperatures. It also shows that the combined use of an ester oil and a hydrocarbon oil as component (C) improves stability at high and low temperatures.

Claims

1. A cleansing composition having a bicontinuous structure, Ingredients: (A) polyoxyethylene glyceryl isostearate; (B) (Caprylic / capric acid) polyoxyethylene glycerides; (C) liquid oil; (D) a trihydric or higher alcohol; (E) a dihydric alcohol; and (F) Water and the content of the component (D) is 20% by mass or more.

2. The component (A) is (a1) polyoxyethylene glyceryl isostearate having 1 to 10 moles of ethylene oxide added, and (a2) Polyoxyethylene glyceryl isostearate having 11 to 80 moles of ethylene oxide added The cleansing composition according to claim 1, which is at least one of the following:

3. 3. The cleansing composition according to claim 1, wherein the component (C) is at least one of an ester oil and a hydrocarbon oil.

4. 4. The cleansing composition according to claim 1, wherein the mass ratio of the component (C) to the total of the component (A) and the component (B) (component (C) / (component (A)+component (B))) is 0.1 to 0.

8.

5. The cleansing composition according to claim 1 , further comprising tri-fatty acid polyoxyethylene glyceryl or coconut oil fatty acid polyoxyethylene glyceryl as component (G).

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