JP7282622B2 - Oil-in-water skin cleanser - Google Patents

Description

The present invention relates to an oil-in-water skin cleanser.

Non-foaming cleansers are commercially available as opposed to general foaming cleansers. Cleansing agents that do not foam include cleansing cosmetics for removing makeup and skin cleansing agents that are used on bare skin to remove dirt on the skin.

Cleansing cosmetics for removing make-up remove make-up and dirt on the skin by soaking it in an oil agent or nonionic surfactant containing a large amount and floating it (see Patent Document 1, etc.). Cleansing cosmetics for removing makeup contain a large amount of oils or nonionic surfactants, so they have a strong degreasing effect and have a large burden on the skin, so the skin feels tight after use, and it is difficult to wash off. often inferior.

As a non-foaming skin cleanser (especially a facial cleanser), by reducing the content of oils and nonionic surfactants in cleansing cosmetics for makeup removal, while maintaining the detergency to remove stains on the skin, Conventionally, products that reduce the burden on the skin and improve the feeling of use have been used.

Such a non-foaming skin cleanser has a lighter burden on the skin than common foaming cleansers, can be expected to have a massage effect during cleansing, and is highly convenient because it does not require foaming. It's in high demand for a reason.

JP 2013-177383 A

However, the conventional techniques as described above have room for improvement from the viewpoint of achieving a better massage effect, excellent washability, and a moisturizing and refreshing feeling on the skin after use.

One aspect of the present invention has been made in view of the above problems, and an object thereof is to provide an oil-in-water skin cleanser that is excellent in massage properties, washability, and moisturizing and refreshing feeling after washing.

As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention have found that by using a specific blending amount of a plurality of specific types of oils, excellent massage properties, wash-off properties, and moisturizing and refreshed feeling after washing-off can be achieved. The inventors have found that an oil-in-water skin cleanser can be realized, and have completed the present invention.

That is, one aspect of the present invention includes the following configurations.

[1] Contains the following component A, component B, component C, component D, component E and component F, the content of component A is 0.2 to 5.0% by mass, and the content of component B is An oil-in-water skin cleanser containing 0.05 to 2.0% by mass and containing 1.0 to 20% by mass of Component C.
Component A: At least one of hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl and hexahydroxystearic acid dipentaerythrityl Component B: Tetra(hydroxystearic acid/isostearic acid) dipentaerythrityl Component C: An oil having a melting point of 30°C or less Component D: Nonionic surfactant Component E: Polyhydric alcohol Component F: Water-soluble polymer [2] The content of component D is 0.05 to 4.0% by mass, in water according to [1] Oil type skin cleanser.

[3] The oil-in-water skin cleanser according to [1] or [2], wherein the component D has an HLB of 8 to 17.

[4] Component D is at least one selected from the group consisting of monoglycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene glycerin fatty acid esters and polyoxyethylene sorbitan fatty acid esters. The oil-in-water skin cleanser according to any one of [1] to [3], which is a seed.

According to one aspect of the present invention, it is possible to provide an oil-in-water skin cleanser that is excellent in massage properties, washability, and moisturizing and refreshing feeling after washing.

An embodiment of the invention will be described below, but the invention is not limited thereto. The present invention is not limited to each configuration described below, and various modifications are possible within the scope of the claims. Further, embodiments or examples obtained by appropriately combining technical means disclosed in different embodiments or examples are also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. In addition, all the scientific literatures and patent documents described in this specification are used as references in this specification.

Unless otherwise specified in this specification, "X to Y" representing a numerical range intends "X or more and Y or less". In addition, unless otherwise specified in this specification, % by mass representing the content of a component is a value based on the total mass of the oil-in-water skin cleanser as 100% by mass.

[1. Oil-in-water skin cleanser]
An oil-in-water skin cleanser according to one embodiment of the present invention contains the following component A, component B, component C, component D, component E and component F, and the content of component A is 0.2 to 5. 0% by mass, the content of component B is 0.05-2.0% by mass, and the content of component C is 1.0-20% by mass.
Component A: At least one of hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl and hexahydroxystearic acid dipentaerythrityl Component B: Tetra(hydroxystearic acid/isostearic acid) dipentaerythrityl Component C: An oil having a melting point of 30°C or less Component D: Nonionic surfactant Component E: Polyhydric alcohol Component F: Water-soluble polymer Hereinafter, the oil-in-water skin cleanser according to one embodiment of the present invention is also simply referred to as "skin cleanser".

When the skin cleanser contains the component A in a predetermined content, it is possible to improve the feeling of thickness of the skin cleanser during cleansing. In addition, the adhesion of the skin cleanser to the skin can be improved by containing the component B in a predetermined content. Therefore, the skin cleanser can be kept in close contact with the skin while maintaining an appropriate thickness, so that the skin can be smoothly massaged during cleansing. That is, an excellent massage effect can be obtained without imposing a burden on the skin. In the present specification, obtaining this excellent massage effect is also referred to as "excellent massage properties". As used herein, the term "feeling of thickness of the skin cleanser at the time of cleansing" means that when the skin cleanser is applied to the skin and blended with dirt on the skin, there is a certain amount of thickness between the finger and the skin. It means the feeling that you can feel a coating layer with a certain thickness.

Component A and component B also contribute to both a refreshing feeling and a moisturizing feeling of the skin after using the skin cleanser. As used herein, the term "refreshing feeling" means that after washing the skin with a skin cleanser and rinsing off the skin cleanser, dirt and the skin cleanser are sufficiently removed and stickiness is suppressed. means As used herein, the term "moisturizing feeling" means that the skin feels moisturized without excessive removal of oil from the skin even after washing the skin with a skin cleanser and rinsing off the skin cleanser. means to be In addition, component E further improves the moisturizing effect.

In addition, by containing the component C, the skin cleanser can be blended with dirt on the skin, so that sufficient detergency can be obtained. By controlling the contents of component A, component B, and component C, which are oil agents, within a predetermined range, it is possible to reduce the burden on the skin, and it is also excellent in washability. As used herein, the phrase "excellent in washability" means that the skin cleanser adhering to the skin can be easily washed off with water or the like.

Component D functions as an emulsifier to form an oil-in-water emulsified system. As a result, it can be used as a non-foaming skin cleanser. In addition, component F can improve the emulsification stability of the skin cleanser.

<Component A>
The skin cleanser contains at least one of dipentaerythrityl hexa(hydroxystearic acid/stearic acid/rosin acid) and dipentaerythrityl hexahydroxystearate as component A. That is, either one of hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl and hexahydroxystearate dipentaerythrityl may be contained, or both may be contained.

The content of component A is 0.2 to 5.0% by mass, preferably 0.5 to 4.0% by mass, more preferably 0.5 to 3.0% by mass.

When the content of component A is 0.2% by mass or more, the feeling of thickness of the skin cleanser during cleansing can be improved, so that massage properties can be improved without imposing a burden on the skin. In addition, the content of component A is preferably 0.2% by mass or more from the viewpoint of refreshing and moisturizing skin after using the skin cleanser. In addition, when the content of component A is 5.0% by mass or less, the skin cleanser can be easily washed away, and the tightness of the skin after use of the skin cleanser can be suppressed.

<Component B>
The skin cleanser contains tetra(hydroxystearic acid/isostearic acid) dipentaerythrityl as component B. The content of component B is 0.05 to 2.0% by mass, preferably 0.1 to 1.2% by mass, more preferably 0.2 to 0.8% by mass.

When the content of component B is 0.05% by mass or more, the adhesion of the skin cleanser to the skin during cleansing can be improved, and thus the massage properties can be improved. In addition, the content of component B is preferably 0.05% by mass or more from the viewpoint of refreshing skin feeling and moisturizing feeling after using the skin cleanser. Further, when the content of component B is 2.0% by mass or less, the skin cleanser can be easily washed away, and stickiness of the skin after use of the skin cleanser can be suppressed.

<Component C>
The skin cleanser contains an oil having a melting point of 30° C. or lower as Component C. In addition, the above-described component A and component B correspond to oils having a melting point of over 30°C. As used herein, the melting point means a value measured according to JIS K0064:1992. Component C includes, for example, silicone oil, vegetable oil, ester oil, hydrocarbon oil, and higher fatty acid having a melting point of 30° C. or lower. As component C, only one type may be used, or two or more types may be used.

Examples of silicone oils having a melting point of 30° C. or less include methylpolysiloxane; methylphenylsilicone oils such as methylphenylpolysiloxane; methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, Cyclic silicone oil; amino-modified silicone (aminopropylmethylsiloxane/dimethylsiloxane copolymer, aminoethylaminopropylsiloxane/dimethylsiloxane copolymer, aminoethylaminopropylmethylsiloxane/dimethylsiloxane copolymer, etc.), carboxy-modified silicone, Modified silicones such as fatty acid-modified silicone, alcohol-modified silicone, aliphatic alcohol-modified silicone, epoxy-modified silicone, fluorine-modified silicone and alkyl-modified silicone; methylhydrogenpolysiloxane, dimethiconol and the like.

Vegetable oils with a melting point of 30°C or less include macadamia nut oil, eucalyptus oil, coconut oil, avocado oil, safflower oil, olive oil, palm oil, palm kernel oil, kukui nut oil, cocoa butter, almond oil, sunflower oil, and rose oil. Hip oil, olive squalane, camellia oil, kiwifruit seed oil, camellia oil, apricot kernel oil, sesame oil, soybean oil, jojoba oil, castor oil, hazelnut oil, medhome oil, mint oil, carrot oil, lavender oil, sugar squalane, and Hydrogenated products thereof (eg, hydrogenated castor oil, hydrogenated jojoba oil, hydrogenated palm oil, hydrogenated avocado oil, hydrogenated soybean oil, etc.) and the like are included.

Examples of ester oils having a melting point of 30°C or less include ethyl oleate, isopropyl myristate, isopropyl palmitate, myristyl myristate, cetyl palmitate, ethylhexyl palmitate, octyldodecyl myristate, isopropyl isostearate, propylene glycol isostearate, 2 -Cetyl ethylhexanoate, glyceryl tri-2-ethylhexanoate, caprylic/capric triglyceryl, isononyl isononanoate, diisopropyl adipate, pentaerythrityl tetraoctanoate, pentaerythritol tetraisostearate, dimalate isostearyl, erythrityl triethylhexanoate, 2-ethylhexyl hydroxystearate and the like.

Examples of hydrocarbon oils having a melting point of 30° C. or less include alkanes, α-olefin oligomers, mineral oils, hydrogenated polyisobutene, light isoparaffins, light liquid isoparaffins, squalanes, synthetic squalanes, vegetable squalanes, liquid isoparaffins, and liquid paraffins. be done. The number of carbon atoms in the alkane is preferably 19 or less, more preferably 13-17, even more preferably 13-15.

The content of component C is 1.0 to 20% by mass, preferably 2.0 to 15% by mass, more preferably 3.0 to 10% by mass. If the content of component C is 1.0% by mass or more, it is preferable from the viewpoint of detergency and moisturizing feeling of the skin after using the skin cleanser. In addition, when the content of component C is 2.0% by mass or more, simple makeup can be removed. When the content of component C is 20% by mass or less, the skin cleanser is easily washed away, and it is preferable from the viewpoint of refreshing and moisturizing skin after using the skin cleanser.

<Component D>
The skin cleanser contains a nonionic surfactant as Component D. As Component D, only one type may be used, or two or more types may be used.

Component D preferably has an HLB (Hydrophile-Lipophile Balance) of 8-17, more preferably 10-17. If the HLB of component D is within the above range, the washability and the stability of the skin cleanser can be further improved. In addition, in this specification, HLB means the value calculated|required by the Griffin method.

Component D is preferably a fatty acid ester type nonionic surfactant, and includes monoglycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene glycerin fatty acid ester and polyoxyethylene sorbitan fatty acid. More preferably, it is at least one selected from the group consisting of esters.

Among them, the component (D) preferably contains monoglycerin fatty acid ester, which is a lipophilic nonionic surfactant, from the viewpoint of further improving the stability of the skin cleanser.

Examples of monoglycerol fatty acid esters include glyceryl monocaprylate, glyceryl monocaprate, glyceryl monolaurate, glyceryl monomyristate, glyceryl monopalmitate, glyceryl monostearate, glyceryl distearate, glyceryl monoisostearate, glyceryl diisostearate. , glyceryl monohydroxystearate, glyceryl monooleate, glyceryl monobehenate, glyceryl dibehenate and the like.

Examples of polyglycerol fatty acid esters include diglyceryl monostearate, diglyceryl monooleate, diglyceryl monoisostearate, tetraglyceryl monostearate, tetraglyceryl monooleate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, Polyglycerin fatty acid monoesters such as hexaglyceryl monostearate, hexaglyceryl monooleate, decaglyceryl monolaurate, decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monooleate; diglyceryl dioleate, decac distearate polyglycerin fatty acid diesters such as glyceryl and decaglyceryl diisostearate; polyglycerin fatty acid triesters such as tetraglyceryl tristearate, hexaglyceryl tristearate, decaglyceryl tristearate, and decaglyceryl trioleate; Examples include polyglycerin fatty acid pentaesters such as tetraglyceryl pentaoleate, hexaglyceryl pentastearate, and hexaglyceryl pentaoleate.

The average degree of polymerization of polyglycerin in the polyglycerol fatty acid ester is preferably 2 to 10 from the viewpoint of enhancing emulsion stability. Further, the fatty acid in the polyglycerol fatty acid ester preferably has 8 to 24 carbon atoms, more preferably 10 to 20 carbon atoms, and still more preferably 12 to 18 carbon atoms, from the viewpoint of enhancing emulsion stability. is a fatty acid of

Examples of sorbitan fatty acid esters include sorbitan monocaprate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan distearate, sorbitan sesquistearate, sorbitan tristearate, sorbitan trioleate, and sorbitan monoisostearate. , sorbitan sesquiisostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan coconut oil fatty acid, and the like.

Examples of polyoxyethylene fatty acid esters include polyethylene glycol monolaurate, polyethylene glycol monopalmitate, polyethylene glycol monostearate, polyethylene glycol monoisostearate, polyethylene glycol distearate, polyethylene glycol monooleate, and polyethylene glycol dioleate. mentioned.

Examples of polyoxyethylene glycerin fatty acid esters include polyoxyethylene (caprylic/capric acid) glyceryl, polyoxyethylene coconut oil fatty acid glycerin, polyoxyethylene glyceryl monooleate, polyoxyethylene glyceryl monomyristate, polystearate oxyethylene glyceryl, polyoxyethylene glyceryl monoisostearate, polyoxyethylene glyceryl triisostearate, and the like. The number of moles of ethylene oxide to be added is not particularly limited, but from the viewpoint of enhancing emulsion stability, it is preferably 2 to 100, more preferably 4 to 90.

Examples of polyoxyethylene sorbitan fatty acid esters include polyoxyethylene sorbitan monolaurate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan oleate, and polyoxyethylene sorbitan trioleate. mentioned. The number of moles of ethylene oxide to be added is not particularly limited, but is preferably 5 to 50, more preferably 10 to 30, from the viewpoint of enhancing emulsion stability.

The content of component D is preferably 0.05 to 4.0% by mass, more preferably 0.1 to 3.5% by mass, still more preferably 0.8 to 2.0% by mass. . A content of component D of 0.05% by mass or more is preferable from the viewpoint of emulsion stability and sufficient detergency. In addition, when the content of component D is 4.0% by mass or less, it is preferable from the viewpoint of moisturizing of the skin after using the skin cleanser.

<Component E>
The skin cleanser contains a polyhydric alcohol as Component E. Polyhydric alcohols include, for example, glycols, glycerins, sugar alcohols, and the like. More specifically, ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, isoprene glycol, 1,3-butylene glycol, 1,2-butanediol, 1,2-pentane glycols such as diols, 1,2-hexanediol, 1,2-octanediol and 1,2-decanediol; glycerins such as glycerin, diglycerin and polyglycerin; xylitol, trehalose, maltitol, mannitol, sorbitol, Examples include sugar alcohols such as erythritol, arabitol, ribitol, galactitol, glucitol, and erythritol. As Component E, only one type may be used, or two or more types may be used.

The content of Component E is preferably 5.0 to 40% by mass, more preferably 7.0 to 30% by mass, still more preferably 10.0 to 25% by mass. If the content of component E is 5.0% by mass or more, it is preferable from the viewpoint of moisturizing of the skin after using the skin cleanser. In addition, if the content of component E is 40% by mass or less, it is preferable from the viewpoint of refreshing skin feeling after using the skin cleanser.

<Component F>
The skin cleanser contains a water-soluble polymer as component F. Component F is preferably a polymer selected from the group consisting of component F1, component F2 and component F3 below. As Component F, only one type may be used, or two or more types may be used. In particular, it is preferable to use component F1 together with component F2 or component F3.

Component F1 is a polymer containing at least structural units (so-called monomer units) derived from acryloyldimethyltaurate. Examples of the acryloyldimethyltaurate include sodium acryloyldimethyltaurate. Component F1 may contain structural units derived from monomer components other than acryloyldimethyltaurate. Examples of monomer components other than acryloyldimethyltaurate include (meth)acrylic acid such as acrylic acid; (meth)acrylates such as sodium acrylate; hydroxyl group-containing acrylic monomers such as hydroxyethyl acrylate; amide group-containing acrylic monomers such as

That is, component F1 is a polymer containing monomer units of acryloyldimethyltaurate. Component F1 is, for example, a copolymer of acrylic acid and acryloyldimethyltaurate, a copolymer of hydroxyethyl acrylate and acryloyldimethyltaurate, a copolymer of acrylic acid, acrylate, acrylamide and acryloyldimethyltaurate. etc.

Component F1 is a compound with the INCI name "Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer ((Na Acryloyldimethyl Taurate) Copolymer)"; loyldimethyl Taurate Copolymer ((Acrylic Compounds such as those described as hydroxyethyl acid/acryloyldimethyltaurate Na) copolymer" are preferred. Among these, (hydroxyethyl acrylate/acryloyldimethyltaurate Na) copolymer) is preferred.

Examples of commercial products of component F1 include SIMULGEL EG (trade name, manufactured by SEPPIC SA, (Na acrylate/acryloyldimethyltaurate Na) copolymer); SIMULGEL NS (trade name, manufactured by SEPPIC SA, (hydroxyethyl acrylate / acryloyl dimethyl taurine Na) copolymer) and the like.

Component F2 is a structural unit derived from (meth)acrylic acid and/or (meth)acrylic acid alkyl ester (monomer component (F2a)) and (meth)acrylic acid polyoxyethylene alkyl ether (monomer component (F2b)). It is a polymer containing at least a structural unit derived from. Examples of the monomer component (F2b) include polyoxyethylene stearyl ether methacrylate and polyoxyethylene behenyl ether methacrylate. Further, the average added mole number of oxyethylene in the monomer component (F2b) is preferably 15-30. Only one kind of each of the monomer component (F2a) and the monomer component (F2b) may be used, or two or more kinds thereof may be used. Component F2 may contain structural units derived from monomer components other than the monomer component (F2a) and the monomer component (F2b).

That is, component F2 is a copolymer containing at least the monomer units of monomer component (F2a) and the monomer units of monomer component (F2b). As component F2, for example, copolymers of (meth)acrylic acid and/or (meth)acrylic acid alkyl esters with methacrylic acid polyoxyethylene stearyl ether, (meth)acrylic acid and/or (meth)acrylic acid alkyl esters and A copolymer with polyoxyethylene behenyl ether of methacrylic acid and the like can be mentioned.

Component F2 includes a compound with the INCI name "ACRYLATES/STEARETH-20 METHACRYLATE COPOLYMER ((Acrylate/steareth methacrylate-20) copolymer"); -20) crosspolymer)”; compounds described as “ACRYLATES/BEHENETH-25 METHACRYLATE COPOLYMER ((acrylates/beheneth methacrylate-25) copolymer)” are preferred. Among these, acrylates/steareth-20 methacrylate) copolymers and (acrylates/beheneth-25 methacrylate) copolymers are preferred from the viewpoint of the stability of skin cleansers.

Commercially available products of component F2 include, for example, Aculin 22, Aculin 28, and Aculin 88 (trade names, all manufactured by Dow Chemical Company).

Component F2 is preferably neutralized with a basic substance or used after neutralization with a basic substance. Examples of basic substances in this case include alkanolamines such as triethanolamine and monoethanolamine; inorganic bases such as ammonia, sodium hydroxide and potassium hydroxide; basic amino acids such as arginine and the like. The amount of the basic substance to be added is an amount that provides a sufficiently neutralized component F2, or an amount that is sufficient to neutralize the component F2. may be appropriately blended according to the amount used.

Component F3 is an alkyl-modified carboxyvinyl polymer. Examples of component F3 include compounds with the INCI name of "Acrylates/C10-30 Alkyl Acrylate Crosspolymer ((Acrylates/C10-30 alkyl acrylate) crosspolymer)". In addition, the component F3 is also called an acrylic acid-alkyl methacrylate copolymer. Commercially available products of component F3 include, for example, PEMULEN TR-1, PEMULEN TR-2, Carbopol ETD 2020, Carbopol ULTREZ 20, Carbopol ULTREZ 21 (trade names, all manufactured by Lubrizol Japan). .

The content of component F is preferably 0.05 to 2.0% by mass, more preferably 0.10 to 1.5% by mass. If the content of component F is 0.05% by mass or more, it is preferable from the viewpoint of emulsification stability and from the viewpoint of a massage effect due to an improvement in the feeling of thickness when washing the skin. Moreover, if the content of component F is 2.0% by mass or less, it is preferable from the viewpoint of washability.

<Other ingredients>
The skin cleanser may contain components other than component A, component B, component C, component D, component E, and component F within a range that does not impair the above effects.

The skin cleanser may contain water. Water serves as a medium to form an oil-in-water emulsified system. Water is not particularly limited, but purified water is preferred. Water may be used as the balance of ingredients other than water in the skin cleanser. Although the content of water is not particularly limited, it is preferably 60 to 90% by mass, more preferably 70 to 85% by mass.

The skin cleanser may contain ethanol from the viewpoint of improving dispersibility of each component and skin permeability. The ethanol content is not particularly limited, but is preferably 0.1 to 30% by mass, more preferably 0.5 to 25% by mass. If the content of ethanol is 0.1% by mass or more, the dispersibility of each component and the permeability to the skin are further improved. Moreover, if the content of ethanol is 30% by mass or less, the effect of suppressing irritation and destabilization due to a decrease in viscosity is even more excellent.

The skin cleanser may contain higher alcohol. Since the higher alcohol has the effect of controlling the viscosity of the system, it can further improve the feeling of thickness of the skin cleanser during cleansing. As the higher alcohol, only one type may be used, or two or more types may be used. Although the number of carbon atoms in the higher alcohol is not particularly limited, it is preferably 12 to 24, more preferably 14 to 22, from the viewpoint of further improving the feeling of thickness of the skin cleanser during cleansing.

Examples of higher alcohols include lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, cetostearyl alcohol, isostearyl alcohol, 2-octyldodecanol, oleyl alcohol, behenyl alcohol and batyl alcohol.

Although the content of the higher alcohol is not particularly limited, it is preferably 0.05 to 5.0% by mass, more preferably 0.10 to 4.0% by mass, and still more preferably 0.10 to 1.0% by mass. % by mass. When the content of the higher alcohol is 0.05% by mass or more, the effect of controlling the viscosity of the system and further improving the feeling of thickness of the skin cleanser during cleansing is excellent. When the content of higher alcohol is 5.0% by mass or less, stickiness and sliminess after application are further suppressed, contributing to the effect of imparting a refreshing feel.

The skin cleanser may contain a neutralizing agent. Neutralizing agents include the basic substances described above for component F2.

The skin cleanser may contain an oil agent having a melting point of over 30°C in addition to component A and component B. Examples of such oils include waxes having a melting point of over 30° C., hydrocarbon oils and higher fatty acids. Examples of waxes having a melting point above 30° C. include carnauba wax, candelilla wax, beeswax, rice bran wax, Japanese wax, shellac wax, spermaceti wax and lanolin. Hydrocarbon oils having a melting point of over 30° C. include, for example, ceresin, paraffin, microcrystalline wax, polyethylene wax and petrolatum. Examples of higher fatty acids having a melting point of over 30° C. include lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid. These may use only 1 type, and may use 2 or more types.

The skin cleanser may contain surfactants other than component D. Surfactants other than component D include anionic surfactants, cationic surfactants, amphoteric surfactants, silicone surfactants and fluorosurfactants. These may use only 1 type, and may use 2 or more types.

Examples of anionic surfactants include higher alkyl sulfate salts such as sodium lauryl sulfate and potassium lauryl sulfate; alkyl ether sulfate salts such as POE-triethanolamine lauryl sulfate and POE-sodium lauryl sulfate; sodium lauroyl sarcosinate; POE-sodium oleyl ether phosphate, POE-phosphate salts such as stearyl ether phosphate; di-2-ethylhexyl sodium sulfosuccinate, monolauroyl monoethanolamide polyoxyethylene sodium sulfosuccinate, lauryl Sulfosuccinates such as sodium polypropylene glycol sulfosuccinate; Alkylbenzenesulfonates such as sodium linadodecylbenzenesulfonate, triethanolamine linadodecylbenzenesulfonate, and linadodecylbenzenesulfonic acid; Higher fatty acids such as hydrogenated coconut oil fatty acid glycerin sulfate Ester sulfate; N-acyl glutamate such as monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, monosodium N-myristoyl-L-glutamate; Sulfated oil such as funnel oil; POE-alkyl ether carboxylic acid POE-alkyl allyl ether carboxylate; α-olefin sulfonate; higher fatty acid ester sulfonate; secondary alcohol sulfate; higher fatty acid alkylolamide sulfate; sodium lauroyl monoethanolamide succinate; palmitoyl aspartic acid ditriethanolamine; sodium caseinate;

Examples of cationic surfactants include alkyltrimethylammonium salts such as stearyltrimethylammonium chloride and lauryltrimethylammonium chloride; alkylpyridinium salts such as cetylpyridinium chloride; distearyldimethylammonium chloride dialkyldimethylammonium salts; N′-dimethyl-3,5-methylenepiperidinium); alkyl quaternary ammonium salts; alkyldimethylbenzylammonium salts; alkylisoquinolinium salts; dialkylmorphonium salts; POE-alkylamines; fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride and the like.

Amphoteric surfactants include, for example, glycine type amphoteric surfactant; aminopropionic acid type amphoteric surfactant; 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium, 2-cocoyl -Imidazolinium amphoteric surfactants such as 2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt; 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, Examples include betaine-based surfactants such as alkylbetaine, amidobetaine, and sulfobetaine.

In addition, skin cleansers include ultraviolet absorbers, powders, antioxidants, preservatives, fragrances, coloring agents, chelating agents, cooling agents, vitamins, amino acids, pH adjusters, whitening agents, anti-inflammatory agents, and deodorants. additives such as agents, animal and plant extracts, and sequestering agents. These may use only 1 type, and may use 2 or more types.

[2. Dosage form, production method and use of oil-in-water skin cleanser]
The dosage form of the skin cleanser may be liquid, gel, milky lotion, cream, or the like.

The method for producing the skin cleanser is not particularly limited, and examples thereof include a method of mixing each of the above components using a known mixing device such as a propeller mixer, disper mixer, paddle mixer, and the like.

A skin cleanser is suitably used, for example, as a face wash. Skin cleansers are not particularly limited, but can be used for cleaning the scalp, body and hands, for example, in addition to facial cleansers.

The product form of the skin cleanser is not particularly limited, but may be a product form filled in a pump container, a tube container, a jar container, or the like. Among these, a product form using a tube container, which is excellent in dischargeability, is preferable.

An embodiment of the present invention will be specifically described below with reference to examples, but the embodiments of the present invention are not limited to these examples. The compounding amount and content in Tables 1 and 2 are amounts (% by mass) converted to pure content.

〔Evaluation methods〕
Evaluation methods performed in each example and each comparative example are shown below. The following evaluation was conducted by three professional evaluators.

<Evaluation of massage properties>
The massaging properties when 3 g of each skin cleanser was applied to the entire face were evaluated according to the following criteria.
⊚ (very good): The skin cleanser was able to adhere to the skin while maintaining a sufficient thickness, and sufficient massage properties were felt.
◯ (good): Although inferior to ⊚, massage properties were felt.
x (poor): The skin cleanser did not give a feeling of thickness and adhesion, friction was generated between the face and fingers, and a smooth massage could not be performed.

<Evaluation of washability>
After evaluating the massageability, the skin cleanser was washed off. The washability at that time was evaluated according to the following criteria.
A (very good): Rinsing was completed by rinsing 1 to 3 times.
○ (Good): Rinsing was completed by rinsing 4 to 7 times.
x (defective): Rinsing was not completed after rinsing eight times.

<Evaluation of moisturizing feeling after rinsing>
After the evaluation of washability, the moisturizing feeling was evaluated according to the following criteria.
⊚ (very good): Sufficient moist feeling was felt.
◯ (Good): A slightly moist feeling was felt.
x (defective): Moisturizing feeling was not felt.

<Evaluation of refreshing feeling after rinsing>
Along with the evaluation of moisturizing feeling, the refreshing feeling was also evaluated according to the following criteria.
⊚ (very good): Sufficient refreshing feeling was felt.
◯ (Good): Refreshing feeling was felt a little.
x (poor): There was a feeling that dirt on the skin or a skin cleanser remained on the skin, and no refreshing feeling was felt.

[Examples 1 to 7 and Comparative Examples 1 to 6]
Skin cleansers of Examples 1-7 and Comparative Examples 1-6 were prepared by blending each component as shown in Tables 1 and 2. Main components used in each example and each comparative example are shown below.

<Component A>
Hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl (trade name “Cosmol 168ARV”, manufactured by Nisshin Oillio Group, melting point 37° C.)
Dipentaerythrityl hexahydroxystearate (trade name “Cosmol 168M”, manufactured by Nisshin OilliO Group, melting point 45° C.)
<Component B>
Tetra(hydroxystearic acid/isostearic acid) dipentaerythrityl (trade name “Cosmol 168EV”, manufactured by Nisshin Oillio Group, melting point 50°C)
<Component C>
(C13-15) alkane (trade name “NEOSSANCE HEMISQUALANE”, manufactured by Aprinnova)
Squalane (trade name “NIKKOL Sugar Squalane”, manufactured by Nikko Chemicals)
<Component D>
Polyglyceryl monostearate (trade name “NIKKOL Decaglyn 1-SV”, manufactured by Nikko Chemicals, HLB: 12)
Polysorbate 60 (HLB: 14.9)
<Component E>
Concentrated glycerin (trade name “Concentrated glycerin for cosmetics”, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.)
Dipropylene glycol (trade name “Dipropylene glycol S”, manufactured by Shell Chemicals Japan)
<Component F>
Acrylic acid/methacrylate alkyl copolymer (trade name “PEMULEN TR-1”, manufactured by Lubrizol Japan)
(Hydroxyethyl acrylate/Na acryloyldimethyltaurate) copolymer (trade name “SIMULGEL NS”, manufactured by SEPPIC SA)
<Other ingredients>
Behenyl alcohol (trade name “Behenyl alcohol 2265”, manufactured by KOKYU ALCOHOL KOGYO CO., LTD.).

〔Evaluation results〕
Each skin cleanser was evaluated as described above. Evaluation results are shown in Tables 1 and 2.

From Tables 1 and 2, Examples 1 to 7, in which component A, component B, and component C were used in predetermined blending amounts, were superior to Comparative Examples 1 to 6 in massaging properties, washability, and moisturizing properties after washout. It is found to be excellent in feeling and refreshing feeling.

(Prescription example 1: gel skin cleanser)
Hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl
2.0% by mass
Tetra(hydroxystearate/isostearate) dipentaerythrityl
1.5% by mass
Methylpolysiloxane (kinematic viscosity at 25°C of 60,000 mm ² /s) 0.7% by mass
Methyl polysiloxane (kinematic viscosity at 25° C. 10 mm ² /s) 2.0% by mass
(Na acrylate/Na acryloyldimethyltaurate) copolymer 0.6% by mass
(Acrylates / Beheneth-25 methacrylate) copolymer 0.2% by weight
Polysorbate 60 0.2% by mass
Glyceryl stearate 0.2% by mass
Polyglyceryl stearate-10 1.0% by mass
Glyceryl behenate 0.2% by mass
Behenyl alcohol 0.5% by mass
Ethylhexyl palmitate 3.0% by mass
Isohexadecane 0.4% by mass
Glycerin 8.0% by mass
Dipropylene glycol 15.0% by mass
Trimethylglycine 5.0% by mass
Ethanol 4.5% by mass
Phenoxyethanol 0.2% by mass
Oxytoxyglycerin 0.1% by mass
Perfume 0.1% by mass
Potassium hydroxide Appropriate amount Water Balance total 100.0% by mass
(Prescription Example 2: Gel skin cleanser)
Hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl
1.0% by mass
Dipentaerythrityl hexahydroxystearate 0.5% by mass
Tetra(hydroxystearate/isostearate) dipentaerythrityl
0.5% by mass
(Hydroxyethyl acrylate/Na acryloyldimethyltaurate) copolymer
0.6% by mass
(C13-15) alkane 4.0% by mass
(Hydroxyethyl acrylate/Na acryloyldimethyltaurate) copolymer
0.6% by mass
(Acrylates/steareth methacrylate-20) copolymer 0.15% by weight
Polysorbate 60 0.2% by mass
Polyglyceryl stearate-10 1.0% by mass
Sorbitan isostearate 0.5% by mass
Glyceryl behenate 0.3% by mass
Behenyl alcohol 0.2% by mass
Squalane 5.0% by mass
Glycerin 12.0% by mass
Dipropylene glycol 5.0% by mass
Ethanol 7.0% by mass
Phenoxyethanol 0.3% by mass
Oxytoxyglycerin 0.05% by mass
l-menthol 0.05% by mass
Perfume 0.1% by mass
Potassium hydroxide Appropriate amount Water Balance total 100.0% by mass

One aspect of the present invention can be suitably used for face, hand, body, scalp cleansers, and the like.

Claims (4)

containing component A, component B, component C, component D, component E and component F below,
The content of component A is 0.2 to 5.0% by mass, the content of component B is 0.05 to 2.0% by mass, and the content of component C is 1.0 to 20% by mass. The content of component D is 0.05 to 4.0% by mass, the content of component E is 5.0 to 40% by mass, and the content of component F is 0.05 to 2.0% by mass. % , an oil-in-water skin cleanser.
Component A: At least one of hexa(hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl and hexahydroxystearic acid dipentaerythrityl Component B: Tetra(hydroxystearic acid/isostearic acid) dipentaerythrityl Component C: An oil having a melting point of 30°C or less Component D: Fatty acid ester type nonionic surfactant with HLB of 8 to 17 Component E: One or more polyhydric alcohols selected from glycols, glycerins and sugar alcohols Component F: Component F1 below, component one or more water-soluble polymers selected from the group consisting of F2 and component F3
Component F1: a polymer containing at least structural units derived from acryloyldimethyltaurate
Component F2: Polymer containing at least structural units derived from (meth)acrylic acid and/or (meth)acrylic acid alkyl ester and structural units derived from (meth)acrylic acid polyoxyethylene alkyl ether
Component F3: Alkyl-modified carboxyvinyl polymer 2. The oil-in-water skin cleanser according to claim 1, wherein said component E contains one or more selected from glycols and glycerins. 3. The oil-in-water skin cleanser according to claim 1, wherein said component F comprises said component F1 and said component F2 or said component F3. Component D is at least one selected from the group consisting of monoglycerin fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene glycerin fatty acid esters and polyoxyethylene sorbitan fatty acid esters. 4. The oil-in-water skin cleanser according to any one of claims 1 to 3.