JP7526022B2 - Cleansing cosmetics - Google Patents

Description

The present invention relates to a cleansing cosmetic product.

Cleansing cosmetics are cosmetics for removing makeup stains such as foundations that contain oils and pigments. Various types of cleansing cosmetics have been marketed to date. To ensure the removal of makeup stains from the skin and to promote blood circulation as well as remove makeup, cleansing cosmetics are sometimes massaged by the user in an arc-like motion several times to blend the cosmetic into the skin. Gel-type cleansing agents are highly viscous, so they drip less from the skin than liquid types and tend to remain on the skin, making them a suitable formulation for massage.

For example, Patent Document 1 discloses an aqueous gel-type cleanser composition that contains a specific surfactant, a polyhydric alcohol, and a water-soluble polymer. It states that this composition results in a cleansing cosmetic product with excellent massaging properties.

Patent Document 2 discloses a skin cleanser that contains an (alkyl-modified) carboxyvinyl polymer, 3 to 20% by mass of a liquid oil, 1.5 to 15% by mass of a nonionic surfactant, 38 to 70% by mass of a polyhydric alcohol, and water, and claims that it provides good massage and cleansing properties.

Japanese Patent Application Publication No. 8-283123 JP 2010-280597 A

The aqueous gel-type cleanser composition disclosed in Patent Document 1 contains a small amount of oily ingredients, so its cleansing power against cosmetics containing a large amount of oily ingredients is not as strong as that of oil-based cleansers.

The gel-type cleansing agent disclosed in Patent Document 2 leaves room for improvement in terms of massage properties after application of the cosmetic agent to the skin.

Furthermore, although consumers who use gel-type cleansing cosmetics often prefer a refreshing feel, all of the cleansing cosmetics disclosed in the above patent documents lacked a refreshing spreadability.

The object of the present invention is therefore to provide a cleansing cosmetic product that feels fresh when spread or blended onto the skin, has excellent massage properties during use, and also has a strong cleansing power.

The present invention is a cleansing cosmetic composition containing the following components (A) to (F): (A) an oil, (B1) a nonionic surfactant having an HLB of 2 or more and less than 8, (B2) a nonionic surfactant having an HLB of 8 or more and less than 15, (C) carrageenan, (D) an acrylic acid/alkyl methacrylate copolymer, (E) a polyhydric alcohol, and (F) water, in which component (A) contains silicone oil and the content of component (A) is 10 mass% or more.

The cleansing cosmetic of the present invention provides a fresh feeling when applied to the skin and spread, has excellent massage properties when spread and blended into the skin, and also has a high cleansing power.

The following describes the embodiments of the present invention. Note that the present invention is not limited to the following embodiments. In this specification, the range "X to Y" includes X and Y and means "X or more and Y or less." Furthermore, unless otherwise specified, operations and measurements of physical properties are performed under conditions of room temperature (20 to 25°C) and relative humidity of 45 to 55% RH.

Cleansing cosmetics are sometimes simply called cleansing products.

(Component (A): Oil)
The oil agent contains silicone oil.If silicone oil is not present, when the cleansing agent is spread on the skin, it is difficult to feel freshness.This is considered to be because the presence of silicone oil prevents the acrylic acid/alkyl methacrylate copolymer of component (D) from contributing to emulsification and being unable to perform its original function in the association/existence state between the acrylic acid/alkyl methacrylate copolymer of component (D) and oil phase.In addition, by blending silicone oil, it can prevent the appearance from becoming cloudy.

Examples of silicone oils include organopolysiloxanes such as dimethylpolysiloxane (dimethicone), methylhydrogenpolysiloxane, methyltrimethicone, methylphenylpolysiloxane, and dimethylsiloxane-methylphenylsiloxane copolymers; cyclic siloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, tetramethyltetrahydrogencyclotetrasiloxane, tetramethyltetraphenylcyclotetrasiloxane, tetramethyltetratrifluoropropylcyclotetrasiloxane, pentamethylpentatrifluoropropylcyclopentasiloxane, and diphenylsiloxyphenyltrimethicone; and modified organopolysiloxanes such as polyether-modified dimethylpolysiloxane, oleyl-modified dimethylpolysiloxane, polyvinylpyrrolidone-modified dimethylpolysiloxane, and alkyl-modified dimethylpolysiloxane. From the viewpoint of massage properties, the silicone oil is preferably one having a kinetic viscosity of 1 to 1000 cs at 25°C, and more preferably one having a kinetic viscosity of 1 to 100 cs. Furthermore, since the effects of the present invention are further enhanced, dimethylpolysiloxane, methylphenylpolysiloxane, and decamethylcyclopentasiloxane are preferred, and dimethylpolysiloxane is particularly preferred.

Silicone oils may be used alone or in combination of two or more types.

The amount of silicone oil in the cleansing agent is preferably 1% by mass or more, and more preferably 3% by mass or more. Within this range, a fresh, moist spread can be obtained. The amount of silicone oil in the cleansing agent is preferably 40% by mass or less, and from the viewpoint of fresh spread and massage properties, it is more preferably 30% by mass or less, even more preferably 25% by mass or less, and particularly preferably less than 10% by mass.

The content of silicone oil in the oil agent is not particularly limited, but may be, for example, 10 to 100% by mass, or 20 to 50% by mass.

Component (A) is preferably a combination of ester oil and silicone oil. The combination of the two is preferable because it further improves the massage and cleansing properties.

Ester oils include glyceryl tri-2-ethylhexanoate, isotridecyl isononanoate, isononyl isononanoate, cetyl 2-ethylhexanoate, isopropyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, octyldodecyl myristate, glyceryl trioctanoate, tri(caprylic/capric)glyceryl, glyceryl diisostearate, glyceryl triisostearate, decaglyceryl decaisostearate (polyglyceryl-10 decaisostearate), propylene glycol dicaprate, neopentyl glycol dicaprate, polyglyceryl triisostearate, diisostearyl malate, neopentyl glycol diethylhexanoate, decaisostearate, glyceryl tri ... Examples of fatty acid ester oils include polyglyceryl-10 tearic acid, pentaerythritol tetraisostearate, pentaerythritol tetra-2-ethylhexanoate (pentaerythrityl tetraethylhexanoate), dipentaerythritol pentaisostearate, dipentaerythrityl hexa(hydroxystearic acid/stearic acid/rosin acid), dialkyl carbonate, tritridecyl trimellitate, bisethoxydiglycol cyclohexane-1,4-dicarboxylate, dimer dilinoleyl hydrogenated rosin condensate, hydrogenated castor oil monostearate, cetyl palmitate, polyethylene glycol distearate, and glyceryl tribehenate; 2-ethylhexyl paramethoxycinnamate, and ethylhexyl salicylate.

As the ester oil, fatty acid ester oil is preferable because the effects of the present invention are more pronounced. In this case, the portion derived from the fatty acid of the fatty acid ester oil preferably has 4 to 24 carbon atoms, and more preferably 6 to 18 carbon atoms. Among the fatty acid ester oils used in combination with silicone oils, isotridecyl isononanoate, propylene glycol dicaprate, isononyl isononanoate, cetyl 2-ethylhexanoate, and isopropyl myristate are particularly preferable.

Ester oils may be used alone or in combination of two or more types.

The mass ratio of silicone oil to ester oil is not particularly limited, but it is preferable that the silicone oil:ester oil ratio is 1:0.5 to 1:10, and more preferably 1:1.5 to 5. Within this range, the massage and cleansing properties are even better.

As component (A), other oils other than the above silicone oils and ester oils may be used. Examples of other oils include hydrocarbon oils such as isododecane, isohexadecane, light isoparaffin, liquid paraffin, squalane, squalene, α-olefin oligomer, polybutene, liquid isoparaffin, heavy liquid isoparaffin, polyisobutylene, and hydrogenated polyisobutene; fatty acids such as oleic acid, isostearic acid, myristic acid, palmitic acid, isopalmitic acid, lauric acid, stearic acid, and behenic acid; higher alcohols such as oleyl alcohol, 2-octyldodecanol, 2-decyltetradecanol, isostearyl alcohol, and 2-hexyldecanol. These include alcohols; fluorine-based oils such as perfluoropolyether, perfluorodecane, and perfluorooctane; liquid oils such as fragrances; paste-like oils such as cacao butter, shea butter, castor oil, hydrogenated castor oil, hydrogenated coconut oil, and petrolatum; and solid oils such as paraffin wax, ceresin wax, microcrystalline wax, polyethylene wax, polypropylene wax, Fischer-Tropsch wax, (ethylene/propylene) copolymers, cholesterol, phytosterol, stearyl-modified polysiloxane, hydrogenated oil, petrolatum, and palm oil.

The content of component (A) is 10% by mass or more relative to the cleansing agent. If the content of component (A) is less than 10% by mass, the cleansing ability for dirt that is difficult to remove with aqueous components such as makeup cosmetics decreases, it becomes difficult to obtain a fresh spread, and the lightness when applied to the skin is lacking. Since the above-mentioned effects are more effectively exhibited, the content of component (A) is more preferably 12% by mass or more. In addition, in consideration of the stability of the formulation, the amount of component (A) is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less from the viewpoint of fresh spread and massage properties.

((B1) Nonionic surfactants having an HLB of 2 or more and less than 8, (B2) Nonionic surfactants having an HLB of 8 or more and 15 or less)
In this embodiment, the nonionic surfactants used are a combination of component (B1), a nonionic surfactant having an HLB of 2 or more and less than 8, and component (B2), a nonionic surfactant having an HLB of 8 or more and 15 or less. Nonionic surfactants are sometimes blended as emulsifiers for oily agents in order to impart cleansing power, but in the system of the present invention, the use of component (B1) and component (B2) in combination significantly improves the cleansing ability.

Component (B1) is preferably a nonionic surfactant having a glyceryl group. Examples of nonionic surfactants having a glyceryl group include alkyl glyceryl ethers, glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glyceryl ether fatty acid esters, polyoxyethylene hydrogenated castor oil, and polyoxyethylene hydrogenated castor oil fatty acid esters. The HLB can be controlled, for example, by the chain length of the polyoxyethylene chain.

Among these, component (B1) is more preferably an alkylene glycol adduct of a glycerin fatty acid ester, a fatty acid ester having a glyceryl group, such as a polyglycerin fatty acid ester, and even more preferably a polyglycerin fatty acid ester.

The polyglycerin fatty acid ester is not particularly limited, but examples thereof include polyglycerin fats such as diglyceryl monostearate, diglyceryl monooleate, diglyceryl monoisostearate, tetraglyceryl monostearate, tetraglyceryl monooleate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, and decaglyceryl monooleate. Acid monoesters; polyglycerol fatty acid diesters such as diglyceryl dioleate, decaglyceryl distearate, and decaglyceryl diisostearate; polyglycerol fatty acid triesters such as tetraglyceryl tristearate, hexaglyceryl tristearate, decaglyceryl tristearate, and decaglyceryl trioleate; and polyglycerol fatty acid pentaesters such as tetraglyceryl pentastearate, tetraglyceryl pentaoleate, hexaglyceryl pentastearate, and hexaglyceryl pentaoleate.

The average degree of polymerization of the polyglycerin in the polyglycerin fatty acid ester is preferably 2 to 5.

Specific examples of component (B1) include alkylene glycol adducts of glycerin fatty acid esters such as PEG-3 glyceryl triisostearate (HLB value: 2), PEG-5 glyceryl triisostearate (HLB value: 3), PEG-10 glyceryl triisostearate (HLB value: 5), and PEG-10 glyceryl diisostearate (HLB value: 7); and polyglycerin fatty acid esters such as polyglyceryl-2 triisostearate (HLB value: 3), polyglyceryl-2 diisostearate (HLB value: 4), and polyglyceryl-3 diisostearate (HLB value: 5).

The HLB of component (B1) is 2 or more and less than 8. Since the effects of the present invention are more pronounced, it is more preferable that the HLB of component (B1) is 2 or more and 7 or less, and even more preferable that the HLB is 3 or more and 6 or less.

HLB (hydrophilic-lipophilic balance) indicates the molecular weight of the hydrophilic group in the total molecular weight of a surfactant, and for nonionic surfactants, it is calculated using Griffin's formula.

Component (B1) may be used alone or in combination of two or more types.

From the viewpoint of cleansing properties, the content of component (B1) is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. From the viewpoint of fresh spreadability and lightness when applied to the skin, the content of component (B1) is preferably 5% by mass or less, more preferably 2% by mass or less, and particularly preferably 1% by mass or less.

Component (B2) has a polyoxyalkylene chain, and may further have a glycerin skeleton, a sorbitan skeleton, or a sorbitol skeleton as a hydrophilic group other than the polyoxyalkylene chain, and examples of those having a lipophilic structure include fatty acids and polymers having a siloxane skeleton. Of these, it is preferable that component (B2) is a nonionic surfactant having a glyceryl group (having a glycerin skeleton). The HLB can be controlled mainly by the chain length of the polyoxyethylene chain.

Specific examples of component (B2) include alkylene glycol adducts of glycerin fatty acid esters; polyglycerin fatty acid esters; alkylene glycol adducts of propylene glycol fatty acid esters; alkylene glycol adducts of sorbitan fatty acid esters such as polyoxyethylene sorbitan coconut oil fatty acid, polyoxyethylene sorbitan monooleate, polyoxyethylene sorbitan trioleate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan tristearate, and polyoxyethylene sorbitan monoisostearate; alkylene glycol adducts of sorbit fatty acid esters such as polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan tetrastearate, and polyoxyethylene sorbitan tetraoleate; polyether-modified silicone; sugar fatty acid esters; polyoxyethylene hydrogenated castor oil; polyalkylene glycol fatty acid esters; polyoxyalkylene alkyl ethers; glycerin alkyl ethers; polyoxyethylene alkylphenyl ethers; alkylene glycol adducts of lanolin, and the like. One or more of these may be used.

Among these, component (B2) is more preferably an alkylene glycol adduct of a glycerin fatty acid ester, a fatty acid ester having a glyceryl group, such as a polyglycerin fatty acid ester, and even more preferably an alkylene glycol adduct of a glycerin fatty acid ester.

Specific examples of the glycerin fatty acid ester constituting the alkylene glycol adduct of glycerin fatty acid ester include glyceryl monolaurate, glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl distearate, glyceryl tristearate, glyceryl trioleate, glyceryl monoisostearate, glyceryl diisostearate, glyceryl triisostearate, and glyceryl monococonut oil fatty acid.

The alkylene glycol in the alkylene glycol adduct of glycerin fatty acid ester is preferably polyoxyethylene glycol. In other words, the alkylene glycol adduct of glycerin fatty acid ester is preferably polyoxyethylene glycerin fatty acid ester. In this case, the average number of moles of alkylene glycol added is appropriately set so that the HLB is 8 or more and 15 or less, for example, 5 to 20.

Specific examples of alkylene glycol adducts of glycerin fatty acid esters include, in the cosmetic product names listed, PEG-9 glyceryl laurate (HLB: 12), PEG-5 glyceryl stearate (HLB: 8), PEG-10 glyceryl stearate (HLB: 11), PEG-15 glyceryl stearate (HLB: 12), PEG-20 glyceryl stearate (HLB: 14), PEG-30 glyceryl stearate (HLB: 15.0), trioleate (HLB: 16.0), and glyceryl stearate (HLB: 17.0). PEG-20 glyceryl trioleate (HLB: 8), PEG-30 glyceryl trioleate (HLB: 10), PEG-40 glyceryl trioleate (HLB: 11), PEG-50 glyceryl trioleate (HLB: 12), PEG-60 glyceryl trioleate (HLB: 13), PEG-5 glyceryl isostearate (HLB: 8.0), PEG-6 glyceryl isostearate (HLB: 8), PEG-8 glyceryl isostearate (HLB : 10), PEG-10 glyceryl isostearate (HLB: 10), PEG-15 glyceryl isostearate (HLB 12), PEG-20 glyceryl isostearate (HLB: 13), PEG-30 glyceryl isostearate (HLB: 15), PEG-20 glyceryl diisostearate (HLB: 10), PEG-30 glyceryl diisostearate (HLB 12), PEG-60 glyceryl diisostearate (HLB: 14), triisostearate Examples include PEG-20 glyceryl stearate (HLB: 8), PEG-30 glyceryl triisostearate (HLB: 10), PEG-40 glyceryl triisostearate (HLB: 11), PEG-50 glyceryl triisostearate (HLB: 12), PEG-60 glyceryl triisostearate (HLB: 13), PEG-60 glyceryl diisostearate (HLB: 14), and PEG-7 glyceryl coconut oil fatty acid (HLB: 13).

Examples of polyglycerol fatty acid esters include polyglyceryl-3 stearate, polyglyceryl-4 stearate, polyglyceryl-6 stearate, polyglyceryl-10 stearate, polyglyceryl-10 distearate, polyglyceryl-10 diisostearate, polyglyceryl-10 oleate, polyglyceryl-10 isostearate, etc.

The HLB of component (B2) is 8 or more and 15 or less. Since the effects of the present invention are more pronounced, the HLB of component (B2) is more preferably 9 or more and 14 or less, and even more preferably 10 or more and 15 or less.

Component (B2) may be used alone or in combination of two or more. Using two or more in combination is a preferred embodiment, and using two in combination is even more preferred. When two types of component (B2) are used in combination, a combination of component (b1) having an HLB of 8 to 12 and component (b2) having an HLB of more than 12 to 15 is also a preferred embodiment, since it provides a fresher spreadability. In this case, the mass ratio of component (b1) to component (b2) is, for example, component (b1):component (b2) = 1:0.1-10, and more preferably 1:0.5-5.

From the viewpoint of cleansing properties, the content of component (B2) in the cleansing agent is preferably 10% by mass or more. From the viewpoint of massage properties and cleansing properties, the content of component (B2) is more preferably 15% by mass or more. Furthermore, the content of component (B2) in the cleansing agent is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 25% by mass or less, from the viewpoint of fresh spreadability and lightness when applied to the skin.

As described above, the effects of the present invention are more pronounced in a preferred embodiment of the present invention in which components (B1) and (B2) are nonionic surfactants having a glyceryl group. Furthermore, a more preferred embodiment of the present invention is in which components (B1) and (B2) are fatty acid esters having a glyceryl group.

The mass ratio of component (B1) and component (B2) is appropriately set so that the effects of the present invention are achieved, but for example, component (B1):component (B2) = 1:3 to 1:50, or 1:5 to 1:30.

(Component (C): Carrageenan)
By blending component (C) in combination with component (D) in the system of the present invention, the system is thickened and the massage property is improved. This is thought to be because, by using it in combination with component (D), the structure formed by the polymers is broken down when it is applied to the skin, but is still adequately maintained, thereby ensuring the massage property. In addition, by blending component (C), a fresh feeling is obtained when it is spread.

Carrageenan is a polysaccharide extracted from red algae, and has a structure in which D-galactose is alternately linked with α-1,3 or β-1,4 bonds. Carrageenan is classified into three types: ι, λ, and κ, depending on the number of sulfate groups and the presence or absence of anhydro bonds. In the present invention, any of the ι (iota), λ (lambda), and κ (kappa) types of carrageenan can be used.

Commercially available examples of carrageenan include iota-type carrageenan GENUVISCO (registered trademark) J-J (manufactured by Sansho Co., Ltd.) and GENUVISCO (registered trademark) PJ-JPE (manufactured by Sansho Co., Ltd.), kappa-type carrageenan GENUGEL (registered trademark) WG-108 (manufactured by Sansho Co., Ltd.) and GENUVISCO (registered trademark) CSW-2 (manufactured by Sansho Co., Ltd.), and lambda-type carrageenan GENUVISCO (registered trademark) CSM-2 (manufactured by Sansho Co., Ltd.). In consideration of the synergistic effect with component (D), iota-carrageenan is preferred.

Carrageenan (component (C)) may be used alone or in combination of two or more types.

The content of component (C) in the cleansing agent is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, and from the viewpoint of fresh spreading and lightness when applied to the skin, particularly preferably 0.35% by mass or more. The content of component (C) in the cleansing agent is preferably 3% by mass or less, more preferably 2% by mass or less, even more preferably 1% by mass or less, and from the viewpoint of fresh spreading and lightness when applied to the skin, particularly preferably 0.8% by mass or less.

(Component (D): Acrylic acid/alkyl methacrylate copolymer (alkyl-modified carboxyvinyl polymer))
The acrylic acid/alkyl methacrylate copolymer is a copolymer of acrylic acid and alkyl methacrylate. It may have a crosslinked structure, and the bonding style such as block bonding and random bonding is not limited. The acrylic acid/alkyl methacrylate copolymer is, for example, a copolymer of acrylic acid and alkyl methacrylate having 10 to 30 carbon atoms (INCI name: (Acrylates/Alkyl Acrylate (C10-30)) Crosspolymer). As the acrylic acid/alkyl methacrylate copolymer, commercially available products such as PEMULEN (registered trademark) TR-1, PEMULEN (registered trademark) TR-2, Carbopol (registered trademark) ETD2020, and Carbopol (registered trademark) 1382 (all manufactured by Lubrizol Advanced Materials) can be used.

Component (D) may be used alone or in combination of two or more types.

Acrylic acid-alkyl methacrylate copolymers usually exhibit a thickening effect by being neutralized with a base and existing as a salt. Examples of bases include alkali metal hydroxides such as sodium and potassium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, and tromethamine; and basic amino acids such as arginine and lysine. Alkaline metal hydroxides such as sodium and potassium are preferred, and potassium hydroxide and sodium hydroxide are more preferred. The amount of base to be added is already known in this field and is appropriately set according to the content of component (D). The base may be added to component (D) in advance and then mixed with other components, or the base may be added after component (D) and other components are mixed.

The content of component (D) in the cleansing agent is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, and from the viewpoint of fresh spreadability and lightness when applied to the skin, particularly preferably 0.35% by mass or more. The content of component (D) in the cleansing agent is preferably 3% by mass or less, more preferably 2% by mass or less, even more preferably 1% by mass or less, and from the viewpoint of fresh spreadability and lightness when applied to the skin, particularly preferably 0.8% by mass or less.

The mass ratio of component (C) to component (D) ((C)/(D)) is preferably 0.5 to 2. When the mass ratio of component (C) to component (D) ((C)/(D)) is in this range, the moist spreadability and lightness when applied to the skin are further improved.

(Component (E): Polyhydric alcohol)
The polyhydric alcohol is an essential component for imparting massaging properties to the cleansing agent of the present invention.

Examples of polyhydric alcohols include glycerin, diglycerin, polyglycerin, ethylene glycol, diethylene glycol, triethylene glycol, tripropylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, 1,3-butylene glycol, polyethylene glycol, sorbitol, xylitol, polyethylene glycol monoethyl ether, diethylene glycol monoethyl ether, ethylene glycol dimethyl ether, 1,2-pentanediol, hexylene glycol, 1,2-hexanediol, maltitol, and glucosyl trehalose.

Among these, since the effect is more pronounced, it is preferable that component (E) be a dihydric to tetrahydric alcohol having 3 to 6 carbon atoms, and more preferably glycerin, dipropylene glycol, or 1,3-butylene glycol.

Component (E) may be used alone or in combination of two or more types. In particular, a combination of glycerin and 1,3-butylene glycol as polyhydric alcohols is a preferred form.

By blending a polyhydric alcohol, the transparency of the appearance can be controlled. In a preferred embodiment of the present invention, the cleansing agent has a transparent or translucent appearance. By making the cleansing agent transparent or translucent, the user can feel makeup dirt being removed by massaging. It is generally difficult to make the appearance transparent with a composition that contains an oil. As described above, the cleansing agent of the present invention contains silicone oil as the oil of component (A), but by further combining it with a polyhydric alcohol, the present invention can make the appearance transparent or translucent.

From the viewpoint of fresh spreading and massaging properties, the blended amount of component (E) in the cleansing agent is preferably 10 to 35% by mass, more preferably 20 to 35% by mass, and particularly preferably 25 to 32% by mass.

(Component (F): Water)
Water is used as a dispersion medium, and is not particularly limited, but examples thereof include purified water, distilled water, ion-exchanged water, tap water, hot spring water, and deep sea water.

The content of component (F) is not particularly limited, but is preferably 10 to 60% by mass, and more preferably 15 to 40% by mass, in the cleansing agent. If it is above the lower limit, a sufficient thickening effect is obtained and the formulation stability is good, and if it is below the lower limit, a sufficient cleansing effect is obtained.

(Other ingredients)
In addition to the components (A) to (F), the cleansing composition of the present invention may further contain, as appropriate, components commonly used in cleansing agents, such as chelating agents, pH adjusters, bactericides, moisturizers, humectants, colorants, preservatives, texture improvers, fragrances, film-forming agents, anti-inflammatory agents, whitening agents, antiperspirants, ultraviolet absorbers, antioxidants, various extracts, etc. However, from the viewpoint of obtaining a composition that is stable against temperature, the cleansing agent of the present invention preferably contains 0.5% or less of an ionic surfactant, more preferably 0.05% or less, and even more preferably contains no ionic surfactant.

The cleansing cosmetic of the present invention is preferably in a gel form. In a gel-type cleansing cosmetic, the term "gel-type" refers to a viscosity in the range of 20,000 to 300,000 mPa·s, and from the viewpoint of spreading smoothly and quickly blending with makeup, the viscosity is more preferably 30,000 to 200,000 mPa·s. The viscosity (mPa·s) is a value measured using a B-type viscometer under the following measurement conditions: rotor No. 4, 3 rpm, 1 minute.

The method for producing the cleansing cosmetic of the present invention is not particularly limited, but for example, a dispersion is obtained by dispersing the polymer of component (D) in component (A) using a disperser or the like. The dispersion of components (A) and (D) is added to a mixture of components (C) and (E) and mixed uniformly, and a base is added to neutralize the polymer of component (D). After that, components (B1) and (B2) are added and mixed uniformly to produce the cosmetic.

The cleansing agent of the present invention is not particularly limited, but is preferably an oil-in-water type, as this makes it easier to achieve the effects of the present invention. Note that in the present invention, a bicontinuous emulsion structure is generally not adopted, as the structure is not maintained.

The cleansing agent of the present invention can be used by taking any amount in the hands and blending it with makeup. After use, it can be washed off with water or wiped off with tissue paper, but it is preferable to wash it off with water to avoid leaving a sticky feeling after use.

The effects of the present invention will be explained using the following examples and comparative examples. In the examples, the terms "parts" and "%" may be used, but unless otherwise specified, they represent "parts by mass" or "% by mass." Furthermore, unless otherwise specified, each operation is carried out at room temperature (25°C).

(Examples 1 to 15 and Comparative Examples 1 to 9)
A gel-type cleansing cosmetic composition (oil-in-water type) having the formulation shown in Table 1 below was prepared.

(Production method)
1. Components (C) and (E) were mixed and heated to 70° C. to obtain a mixture.
2. Component (D) was added to component (A) and uniformly dispersed using a Dispaster, and then added to the mixture obtained in 1 (temperature maintained at 70° C.) and mixed uniformly.
3. Triethanolamine was added to the mixture obtained in 2 and mixed, after which component (B1) and component (B2) were added and mixed uniformly to obtain a cleansing cosmetic preparation.

Evaluation 1: Fresh spread of the cleansing agent during use A test was conducted by 20 expert panelists for each sample, and each panelist rated it on a scale of four according to the absolute criteria below. The average score was calculated from the total score of all panelists, and the results were judged according to the following criteria. Specifically, after applying makeup using a water-in-oil liquid foundation in advance, the cleansing agents of the examples and comparative examples were used, and the freshness felt when the cleansing agent was spread on the skin was evaluated. The results are shown in Table 1. The water-in-oil liquid foundation used here had the following formula. A or higher is considered to be a high evaluation in practical use.

[Formulation for water-in-oil liquid foundation (for cleansing)]
(Components) (% by mass)
1. PEG-9 Polydimethylsiloxyethyl Dimethicone (Note 1) 3
2. Decamethylcyclopentasiloxane 20
3. Silicone-treated talc (Note 2) 5
4. Silicone-treated red iron oxide (Note 2) 0.5
5. Silicone-treated yellow iron oxide (Note 2) 0.5
6. Silicone-treated black iron oxide (Note 2) 0.5
7. Silicone-treated titanium dioxide (Note 2) 10
8. Glyceryl tri-2-ethylhexanoate 10
9. Sorbitan Sesquioleate 0.5
10. Distilled water remaining 11. Sodium chloride 0.5
12. 1,3-butylene glycol 10
13. Alcohol 5
14. Preservative (methyl parahydroxybenzoate) 0.1
15. Fragrance 0.2
(Note 1) KF-6028 (manufactured by Shin-Etsu Chemical Co., Ltd.)
(Note 2) Treated with 2% dimethylpolysiloxane.

Manufacturing method for water-in-oil liquid foundation (for cleansing) (1) Mix components 1 and 2 uniformly.
(2) Components 3 to 9 are uniformly dispersed using a roller.
(3) Add (2) to (1) above and mix uniformly.
(4) Components 10 to 15 were added to (3) above and emulsified to obtain a water-in-oil liquid foundation.

(Absolute Standard)
(Score): (Evaluation result)
3: Very sensitive 2: Sensitive 1: Slightly sensitive 0: Not sensitive (no squashing sensation, sticky and heavy)
<Criteria>
(Average score): (Judgment)
(Average score): (Judgment)
2.5 points or more: ◎
2 points or more and less than 2.5 points: ○
1 point or more but less than 2 points: △
Less than 1 point: ×.

Evaluation 2: Massage Evaluation (A) Lightness when the cleansing cosmetic is applied to the skin A test was conducted by 20 expert panelists for each sample, and each panelist evaluated the sample on a four-level scale according to the absolute criteria below. The average score was calculated from the total score of all panelists, and the evaluation was made according to the following criteria. Specifically, after applying makeup in advance in the same manner as in Evaluation 1, the cleansing cosmetic was placed on the skin, spread over the entire face, and then the cleansing cosmetic was applied to the skin in an arc-like manner a certain number of times at the same location to evaluate the lightness. The results are shown in Table 1. A score of ◯ or higher is considered to be a high evaluation in practical use.
(Absolute Standard)
(Score): (Evaluation result)
3: Very sensitive 2: Sensitive 1: Slightly sensitive 0: Not sensitive <Judgment criteria>
(Average score): (Judgment)
(Average score): (Judgment)
2.5 points or more: ◎
2 points or more and less than 2.5 points: ○
1 point or more but less than 2 points: △
Less than 1 point: ×.

Evaluation 3: Massage Evaluation (B) Film thickness when the cleansing cosmetic is applied to the skin A test was conducted by 20 expert panelists for each sample, and each panelist evaluated the sample on a four-level scale according to the absolute criteria below. The average score was calculated from the total score of all panelists, and the evaluation was made according to the following criteria. Specifically, after applying makeup in advance in the same manner as in Evaluation 1, the cleansing cosmetic was placed on the skin, spread over the entire face, and then the cleansing cosmetic was applied to the skin in an arc-like pattern a certain number of times at the same location, and the film thickness (softness) was evaluated. The results are shown in Table 1. A score of ◯ or higher is considered to be a high evaluation in practical use.
(Absolute Standard)
(Score): (Evaluation result)
3: Very sensitive 2: Sensitive 1: Slightly sensitive 0: Not sensitive <Judgment criteria>
(Average score): (Judgment)
(Average score): (Judgment)
2.5 points or more: ◎
2 points or more and less than 2.5 points: ○
1 point or more but less than 2 points: △
Less than 1 point: ×.

Rating 4: Cleansing ability (makeup removal)
A 20-member expert panel conducted a usability test on each sample, and each member of the panel rated it on a four-point scale using the absolute criteria below. The average score was calculated from the total score of all panelists, and judged according to the following criteria. Specifically, after the evaluation in the above evaluation 3, the sample was rinsed with a certain amount of water and evaluated for whether makeup stains had been removed. The results are shown in Table 1. A score of ◯ or higher is considered to be a high rating in practical use.
(Absolute Standard)
(Score): (Evaluation result)
3: Very good 2: Good 1: Poor 0: Poor <Judgment criteria>
(Average score): (Judgment)
(Average score): (Judgment)
2.5 points or more: ◎
2 points or more and less than 2.5 points: ○
1 point or more but less than 2 points: △
Less than 1 point: ×.

Reference evaluation: Transparency: The sample was placed in a quartz cell with a thickness of 1 cm and judged visually. A 5 mm wide black and white striped paper was placed on the opposite side of the quartz cell, and the degree to which the sample could be distinguished was judged according to the following criteria.

Transparent: Black and white stripes can be clearly seen through the quartz cell.

Semi-transparent: The stripes can be seen to some extent.

Cloudy: Black and white stripes are completely indistinguishable.

The results are shown in Table 1.

As described above, the cleansing agents of the Examples were gel-like cleansing cosmetics that felt fresh when applied to the skin and spread, had excellent massage properties when spread and blended into the skin, and also had strong cleansing power. All of the cleansing agents of the Examples and Comparative Examples were gel-like (viscosity of 20,000 to 300,000 mPa·s).

On the other hand, in Comparative Example 1, which does not contain silicone oil as an oil agent, the cleansing agent was not easily moisturized when spread. In Comparative Example 2, which uses a carboxyvinyl polymer instead of component (D), the cleansing agent was not easily moisturized when spread, and also lacked massaging properties. On the other hand, Comparative Example 3, which does not contain component (D), was significantly lacking in massaging properties. In Comparative Example 4, which uses xanthan gum, which is also a polysaccharide, instead of component (C), and Comparative Example 5, which does not contain component (C), the cleansing agent was not easily moisturized when spread, and also lacked massaging properties. Comparative Example 6, which does not contain component (B1), was lacking in cleansing properties. Furthermore, in Comparative Example 7, which contains a small amount of component (A), the cleansing agent was not easily moisturized when spread, felt heavy when spread, and also lacked cleansing properties.

Claims (5)

The following components (A) to (F):
(A) an oil solution; (B1) a nonionic surfactant having an HLB of 2 or more and less than 8; (B2) a nonionic surfactant having an HLB of 8 or more and less than 15; (C) carrageenan; (D) an acrylic acid/alkyl methacrylate copolymer; (E) a polyhydric alcohol; and (F) water,
The component (A) contains a silicone oil, and the content of the component (A) is 10% by mass or more and 40% by mass or less ,
The cleansing cosmetic preparation has a content of the component (B1) of 0.1 to 5 mass%, a content of the component (B2) of 10 to 40 mass%, a content of the component (C) of 0.05 to 3 mass%, and a content of the component (D) of 0.05 to 3 mass%. The cleansing cosmetic according to claim 1, wherein components (B1) and (B2) are nonionic surfactants having a glyceryl group. 3. The cleansing cosmetic preparation according to claim 1, wherein the mass ratio of said component (C) to said component (D) is 0.5 to 2. The cleansing cosmetic preparation according to any one of claims 1 to 3 , wherein the component (A) is a combination of an ester oil and a silicone oil. The cleansing cosmetic preparation according to any one of claims 1 to 4 , wherein the content of the component (E) is 10 to 35 mass%.