cleansing cream

Abstract

To provide a cleansing cream that has a proper phase inversion rate, has both functions of massaging and makeup removal, and has a high moisturizing effect after rinsing.SOLUTION: A cleansing cream contains the following components (A)-(G): (A) oil that is liquid at 25°C of 20-60 mass%, (B) a nonionic surfactant with an HLB value of 12 or more of 2-8 mass%, (C) a nonionic surfactant with an HLB value of 8 or less of 0.5-5 mass%, (D) a C8-30 higher alcohol of 0.5-6 mass%, (E) tocopheryl phosphate and / or a salt thereof, (F) a polyhydric alcohol and (G) water.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Conventionally, cleansing cosmetics for removing sebum stains and makeup cosmetics from the skin include a variety of types, including oil-based products containing liquid oil as the main ingredient, cream-, emulsion-, and gel-based products in which oily components are emulsified with surfactants, and even lotion- and aqueous gel-based products containing no or only trace amounts of oily components. Of these, proposed cleansing cosmetics that emulsify oily components include cleansing cosmetics that contain a paste-like oil component to improve the feel when used (Patent Documents 1 and 2) and cleansing cosmetics that contain a relatively large amount of oily components to enhance the cleansing effect (Patent Documents 3 to 5).

[0003] Creamy or gel-like O / W emulsions containing a relatively large amount of oily ingredients retain their shape when first applied to the skin, but sometimes undergo a phase inversion from O / W to W / O as they are spread on the skin and blended with makeup cosmetics. This phase inversion releases the oily ingredients contained within, improving compatibility with the makeup cosmetics and providing the advantage of making it easier to determine when they have blended with the makeup cosmetics. Cleansing creams that take advantage of this phase inversion include cleansing cosmetics that combine a sorbitan-based nonionic surfactant, an N-acylamino acid surfactant, liquid oil, water, and an ester of dipentaerythritol and a hydroxy fatty acid or polyhydroxy fatty acid (Patent Document 6), and oil-in-water emulsion cosmetics that contain a dextrin fatty acid ester with a high proportion of specific branched saturated fatty acids, specific oils, and surfactants (Patent Document 7). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-212031 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-95917 [Patent Document 3] Japanese Patent Application Laid-Open No. 2007-119393 [Patent Document 4] Patent No. 3781711 [Patent Document 5] Patent No. 4185441 [Patent Document 6] Japanese Patent Application Laid-Open No. 2014-76970 [Patent Document 7] Japanese Patent Application Laid-Open No. 2016-185927 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the cleansing cosmetics disclosed in Cited Documents 5 and 6 have excellent massaging properties and makeup-removing effects, but have a problem with moisturizing feeling after rinsing. Therefore, an object of the present invention is to provide a cleansing cream that has an appropriate phase inversion rate, combines massaging properties and makeup-removing effects, and provides excellent moisturizing effect after rinsing. [Means for solving the problem]

[0006] A cleansing cream containing the following ingredients (A) to (G): (A) 20 to 60% by mass of oil that is liquid at 25°C (B) 2 to 8% by mass of a nonionic surfactant with an HLB value of 12 or more (C) 0.5 to 5% by mass of a nonionic surfactant with an HLB value of 8 or less (D) 0.5 to 6 mass% of a higher alcohol having 8 to 30 carbon atoms (E) Tocopheryl phosphate ester and / or its salt (F) polyhydric alcohols and (G)Water [Effects of the Invention]

[0007] The cleansing cream of the present invention has an appropriate phase inversion rate, combines massaging properties with makeup-removing effects, and exerts an excellent moisturizing effect after rinsing. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described.

[0009] The cleansing cream of the present invention can be used for both cosmetics and quasi-drugs.

[0010] The cleansing cream of the present invention contains 20 to 60% by mass of component (A), a liquid oily component. Any liquid oil that is used in ordinary cosmetics and is liquid at 25°C can be used without any particular limitation. Examples of such liquid oily components include rapeseed oil, avocado oil, almond oil, olive oil, kukui nut oil, sesame oil, wheat germ oil, rice germ oil, rice bran oil, rice oil, safflower oil, sunflower oil, soybean oil, evening primrose oil, corn oil, rapeseed oil, persic oil, palm oil, palm kernel oil, castor oil, jojoba oil, grapeseed oil, macadamia nut oil, meadowfoam oil, menjitsu oil, and coconut oil; Animal oils such as liquid horse oil, mink oil, and liquid lanolin; linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, squalane, squalene, etc.; Higher fatty acids such as oleic acid and isostearic acid; higher alcohols such as isostearyl alcohol, octyldodecanol, and hexyldecanol; alkyl glyceryl ethers such as isostearyl glyceryl ether; ester oils of straight-chain fatty acids with lower alcohols, such as isopropyl myristate, butyl myristate, isopropyl palmitate, ethyl stearate, butyl stearate, ethyl oleate, ethyl linoleate, and isopropyl linoleate; ester oils of straight-chain fatty acids and straight-chain higher alcohols, such as cetyl caprate, hexyl laurate, decyl myristate, myristyl myristate, cetyl myristate, cetyl palmitate, stearyl stearate, decyl oleate, and oleyl oleate; Ester oils of straight-chain fatty acids and branched-chain alcohols, such as perilla laurate, isotridecyl myristate, isocetyl myristate, isostearyl myristate, octyldodecyl myristate, 2-ethylhexyl palmitate, isocetyl palmitate, isostearyl palmitate, 2-ethylhexyl stearate, isocetyl stearate, isodecyl oleate, octyldodecyl oleate, and octyldodecyl ricinoleate; Ester oils of branched chain fatty acids and lower alcohols, such as ethyl isostearate and isopropyl isostearate; Ester oils of branched fatty acids and linear higher alcohols, such as cetyl 2-ethylhexanoate, cetostearyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, hexyl isostearate, and 2-hexyldecyl isostearate; Ester oils of fatty acids and polyhydric alcohols, such as ethylene glycol dioctanoate, ethylene glycol dioleate, propylene glycol dicaprylate, propylene glycol dicaprylate-caprate, propylene glycol dicaprate, dipropylene glycol dioleate, neopentyl glycol dicaprate, neopentyl glycol dioctanoate, glyceryl tricaprylate, glyceryl tri-2-ethylhexanoate, glyceryl tri-(caprylate-caprate), glyceryl triisopalmitate, glyceryl isostearate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, pentaerythritol tetraisostearate, and pentaerythritol tetra-2-ethylhexanoate; Ester oils of branched chain fatty acids and branched chain alcohols, such as octyldodecyl neopentanoate, isocetyl octanoate, isostearyl octanoate, 2-ethylhexyl isopelargonate, hexyldecyl dimethyloctanoate, octyldodecyl dimethyloctanoate, 2-ethylhexyl isopalmitate, isocetyl isostearate, isostearyl isostearate, and octyldodecyl isostearate; ester oils having a hydroxyl group, such as lauryl lactate, myristyl lactate, cetyl lactate, octyldodecyl lactate, trioctyl citrate, triisocetyl citrate, trioctyldodecyl citrate, and diisostearyl malate; dibasic acid ester oils such as dioctyl succinate, diisopropyl adipate, diisobutyl adipate, dioctyl adipate, diethyl sebacate, diisopropyl sebacate, and dioctyl sebacate; Silicone oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and higher alcohol-modified silicone oil; Examples include fluorine oils such as fluoropolyether and perfluoroalkyl ether silicone, etc. In the present invention, one of these liquid oils is used alone, or two or more of them are used in combination.

[0011] Among these liquid oily components, it is preferable to use one or more selected from cetyl 2-ethylhexanoate, decamethylcyclopentasiloxane, pentaerythritol tetra-2-ethylhexanoate, isostearyl pivalate, hexyldecyl isostearate, cetyl isostearate, neopentyl glycol dicaprate, 2-hexyldecyl isostearate, and squalane.

[0012] The amount of liquid oily ingredient blended is 20 to 60% by mass of the total amount of cleansing cream. If blended at less than 20% by mass, a satisfactory cleansing effect may not be obtained. If blended at more than 60% by mass, emulsion stability over time may not be maintained.

[0013] The cleansing cream of the present invention contains 2 to 8 mass % of (B) a nonionic surfactant having an HLB value of 12 or more.

[0014] Here, the HLB value (Hydphile-Lipophile Balance) in the present invention is an index showing the balance of hydrophilicity and lipophilicity, and is calculated by Oda and Teramura et al. using the following formula (1): HLB value = inorganic value (IV) / organic value (OV) × 10 (Equation 1) (See Yoshio Koda, "Organic Conceptual Diagram - Fundamentals and Applications", pp. 11-17, Sankyo Publishing, 1984)

[0015] The nonionic surfactant having an HLB value of 12 or more used in the present invention may be any surfactant commonly used in cosmetics, such as polyoxyethylene sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene alkyl ether, and polyoxyethylene hydrogenated castor oil.

[0016] Examples of polyoxyethylene sorbitan fatty acid esters include POE (80) sorbitan monolaurate (HLB value 19.0), POE (20) sorbitan monolaurate (HLB value 16.9), POE (6) sorbitan monolaurate (HLB value 15.5), POE (20) sorbitan monopalmitate (HLB value 15.6), and POE (20) sorbitan monostearate (HLB value 14.9). Examples of polyglycerin fatty acid esters include hexaglyceryl monolaurate (HLB value 14.5) and decaglyceryl monolaurate (HLB value 15.5). Examples of polyoxyethylene fatty acid esters include POE (10) monolaurate (HLB value 12.5), POE (25) monostearate (HLB value 15.0), and POE (240) monostearate (HLB value 17.5). Examples of polyoxyethylene alkyl ethers include POE (9) lauryl ether (HLB value 14.5), POE (10) cetyl ether (HLB value 13.5), POE (20) phytosterol ether (HLB value 15.5), POE (30) phytosterol ether (HLB value 18.0), etc. Examples of polyoxyethylene hydrogenated castor oils include POE (40) hydrogenated castor oil (HLB value 12.5), POE (60) hydrogenated castor oil (HLB value 14.0), etc.

[0017] The cleansing cream of the present invention contains 0.5 to 5 mass% of component (C), a nonionic surfactant with an HLB value of 8 or less. Component (C), a nonionic surfactant with an HLB value of 8 or less, improves cleansing power and formulation stability. Examples of component (C) include ether-type nonionic surfactants such as polyoxyethylene alkyl ether-type nonionic surfactants, and ester-type nonionic surfactants such as monoglycerin fatty acid esters, polyglycerin fatty acid esters, and sorbitan fatty acid esters.

[0018] Specific examples of component (C) are listed below. The number in parentheses next to the compound name POE indicates the number of moles of EO added. Furthermore, in the present invention, the HLB value is determined by actual measurements, as described below, but values ​​such as those listed in the Nikko Chemicals catalog (2014) are listed as reference values. Specific examples of the component (C) include POE (3) alkyl (C12-14) ether (HLB value: 8), POE (2) cetyl ether (HLB value: 8.0), POE (2) myristyl ether (HLB value: 5.8), POE (3) myristyl ether (HLB value: 7.7), POE (2) hexyldecyl ether (HLB value: 5.3), POE (2) stearyl ether (HLB value: 8.0), POE (2) oleyl ether (HLB value: 4.9), POE (3) oleyl ether (HLB value: 6.6), POE (2) octyldodecyl ether (HLB value: 4.6), POE (2) behenyl ether (HLB value: 4.3), POE (3) behenyl ether. glyceryl ether (HLB value: 5.8), POE(5) behenyl ether (HLB value: 7.0), lipophilic glyceryl monooleate (HLB value: 2.5), lipophilic glyceryl monostearate (HLB value: 4.0), self-emulsifying glyceryl monostearate (HLB value: 6.0), glyceryl monomyristate (HLB value: 3.5), polyglyceryl monostearate (HLB value: 5.0), sorbitan monooleate (HLB value: 4.3), sorbitan sesquioleate (HLB value: 3.7), sorbitan trioleate (HLB value: 1.7), sorbitan monostearate (HLB value: 4.7), sorbitan monopalmitate (HLB value: 6.7), etc. Among these specific examples, only one type may be contained alone, or two or more types may be contained in combination.

[0019] Specific examples of component (C) include glyceryl monostearate (HLB value: 3.0), glyceryl monoisostearate (HLB value: 4.0), glyceryl monooleate (HLB value: 2.5), sorbitan monoisostearate (HLB value: 5.0), sorbitan sesquiisostearate (HLB value: 5.5), sorbitan monooleate (HLB value: 4.3), sorbitan sesquioleate (HLB value: 3.7), sorbitan trioleate (HLB value: 1.7), etc. In the present invention, it is preferable to use one or two selected from glyceryl monostearate and sorbitan sesquiisostearate as component (C) from the viewpoint of the stability of the cleansing cream.

[0020] The cleansing cream of the present invention contains 0.5 to 6 mass% of component (D), a higher alcohol having 8 to 30 carbon atoms. Such higher alcohols are linear or branched, saturated or unsaturated hydrocarbon monohydric alcohols, and may be used singly or in combination of two or more. Specific examples include caprylyl alcohol, capryl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, hexyldecanol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, octyldodecanol, arachyl alcohol, behenyl alcohol, carnaubin alcohol, and ceryl alcohol. Among these higher alcohols, one or more selected from cetyl alcohol, stearyl alcohol, arachyl alcohol, and behenyl alcohol are preferably used, with behenyl alcohol being most preferred from the viewpoint of emulsion stability.

[0021] The amount of such higher alcohol to be blended is 0.5 to 6% by mass relative to the total amount of the cleansing cream. If it is less than 0.5% by mass, stability over time cannot be maintained, and if it exceeds 6% by mass, the cleansing cream will be sticky when rinsed off.

[0022] The cleansing cream of the present invention contains component (E): tocopheryl phosphate and / or its salt. The tocopheryl phosphate and / or its salt used in the present invention can be synthesized from tocopherol by a conventional method, and reference can be made to Japanese Patent Publication Nos. 61-20583 and 3-32558. These can be selected from α, β, γ, δ types, or d, l, and dl types.

[0023] In the present invention, in addition to tocopheryl phosphate, salts of tocopheryl phosphate can also be used. The type of salt is not limited, but alkali metal salts such as sodium and potassium, and alkaline earth metal salts such as calcium and magnesium are generally used. In particular, it is preferable to use TPNa (registered trademark) (manufactured by Showa Denko K.K.), which is tocopheryl phosphate sodium salt.

[0024] The amount of tocopheryl phosphate and / or its salt (Component (E)) used in the present invention varies depending on the dosage form and the desired effect, but is usually 0.01% by mass or more, preferably 0.1 to 10% by mass. If it is less than 0.01% by mass, the phase inversion rate adjusting effect may not be sufficient.

[0025] The cleansing cream of the present invention contains a polyhydric alcohol (component (F)). Any polyhydric alcohol commonly used in cosmetics may be used. Specific examples of polyhydric alcohols include 1,2-propanediol (propylene glycol), 1,3-butanediol (BG), 3-methyl-1,3-butanediol (isoprene glycol), 1,2-pentanediol, 1,2-hexanediol, 2,4-hexanediol, 1,2-octanediol, glycerin, dipropylene glycol, polyethylene glycol, diglycerin, and sugars such as sucrose, erythritol, sorbitol, xylitol, maltitol, and glycosyl trehalose. Among these, it is preferable to contain one or more selected from glycerin 1,3-butanediol, glycosyl trehalose, and dipropylene glycol.

[0026] The cleansing cream of the present invention preferably contains 30 to 65% by mass of the combined components (F) and (G). If the combined amount of components (F) and (G) is less than 30% by mass, the cleansing cream may feel sticky or a stable cleansing cream may not be obtained. If the combined amount exceeds 65% by mass, a satisfactory cleansing effect may not be obtained.

[0027] In addition to the essential and optional components described above, the cleansing cream of the present invention may contain optional components used in ordinary cosmetics and quasi-drugs to the extent that the effects of the present invention are not impaired. Specific examples of such optional components include oily components other than those described above, surfactants, thickeners, preservatives, fragrances, moisturizers, antioxidants, anti-inflammatory agents, and antibacterial agents. [Example]

[0028] Examples of the cleansing cream of the present invention are shown below. These examples are merely examples of the present invention and are not intended to limit the scope of the present invention. The blend amounts are expressed in mass % unless otherwise specified.

[0029] The evaluation methods for the examples and comparative examples of the present invention are described below.

[0030] The cleansing creams of the Examples and Comparative Examples shown in Tables 1 and 2 were produced by conventional methods. These Examples and Comparative Examples were evaluated as follows. The results are shown in Tables 1 and 2. [Evaluation items and criteria] A facial use test was conducted by three expert panelists, who gave absolute ratings for each item according to the following evaluation criteria, and then decided by consensus based on the following judging criteria. The panelists also applied a standardized cream foundation and lipstick before making the evaluation. <Appropriate phase inversion speed> The appropriateness of the phase inversion rate when cleansing with the cleansing cream was evaluated. <Massage> The massaging properties during cleansing using the cleansing cream were evaluated. <Makeup removal effect> The makeup removal effect was evaluated when cleansing with the cleansing cream. After rinsing off the cleansing cream, the moisturizing feeling was evaluated. <Judgment criteria> Very good ◎ Good 〇 Somewhat bad △ Bad ×

[0031] [Table 1]

[0032] [Table 2]

[0033] As shown in Tables 1 and 2, the cleansing cream of the present invention had an appropriate phase inversion rate, combined massaging properties with makeup removal effects, and provided excellent moisturizing effects after rinsing.

Claims

[Claim 1] A cleansing cream containing the following components (A) to (G), wherein the total content of the components (F) and (G) is 30 to 65% by mass: (A) 20 to 60% by mass of oil that is liquid at 25°C (B) 2 to 8% by mass of a nonionic surfactant with an HLB value of 12 or more (C) 0.5 to 5% by mass of a nonionic surfactant with an HLB value of 8 or less (D) 0.5 to 6% by mass of a higher alcohol having 8 to 30 carbon atoms (E) 0.01 to 10% by mass of tocopheryl phosphate ester and / or its salt (F) polyhydric alcohols and (G) Water

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