JP7233892B2 - skin cleanser composition - Google Patents

Description

The present invention relates to skin cleanser compositions.

BACKGROUND ART Heretofore, skin cleansing compositions have been investigated which are excellent in removing dirt from the skin surface, foaming well, and improving the skin condition after cleansing. For example, Patent Documents 1 and 2 disclose skin cleansing compositions containing polyglyceryl monoalkyl ether and the like as skin cleansing compositions for achieving the above-mentioned problems.

A skin cleanser composition containing a scrubbing agent is known as a cleanser having excellent sebum-removing power. For example, Patent Document 3 discloses a skin cleansing composition containing a scrubbing agent having a median particle size of 100 μm or more and 1,000 μm or less.

JP 2009-242274 A JP 2015-229638 A JP 2018-118917 A

However, the skin cleanser compositions disclosed in Patent Documents 1 and 2 have room for further improvement from the viewpoint of sebum-removing power. In addition, the skin cleansing composition containing a scrubbing agent as disclosed in Patent Document 3 has room for further improvement from the viewpoint of burden on the skin.

One embodiment of the present invention has been made in view of the above-mentioned problems, and its object is to provide a novel skin cleanser composition that does not place a heavy burden on the skin and has excellent sebum-removing power. be.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a skin cleanser with excellent sebum-removing power without imposing a heavy burden on the skin by containing activated carbon having a specific component and a specific particle size. The inventors have found that it is possible to provide an agent composition, and have completed the present invention.

That is, one embodiment of the present invention includes the following configurations.
[1] Skin cleanser composition containing component A and component B: component A is activated carbon having an average particle size of 15 to 50 μm; At least one component selected from the group consisting of derivatives of glycerin fatty acid esters and polyglyceryl alkyl ethers.
[2] The skin cleanser composition according to [1], which further contains a surfactant other than the component B as the component C.
[3] The skin cleanser composition according to [1] or [2], wherein the component B contains at least polyglyceryl alkyl ether.
[4] The skin cleanser composition according to any one of [1] to [3], which does not substantially contain particles having an average particle size of 100 μm or more.
[5] The composition according to any one of [1] to [4], wherein the content of component A is 0.1% by mass to 25.0% by mass in 100% by mass of the skin cleanser composition. A skin cleanser composition.
[6] The composition according to any one of [1] to [5], wherein the content of component B is 0.01% by mass to 10.0% by mass in 100% by mass of the skin cleanser composition. A skin cleanser composition.

ADVANTAGE OF THE INVENTION According to one embodiment of the present invention, it is possible to provide a skin cleanser composition having excellent sebum-removing power without imposing a heavy burden on the skin.

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. In addition, unless otherwise specified in this specification, the numerical range “X to Y” intends “X or more (including X and greater than X) and Y or less (including Y and smaller than Y)”.

[1. Outline of technical idea of one embodiment of the present invention]
As a result of investigations by the present inventors, it was found that the skin cleansing compositions disclosed in Patent Documents 1 and 2 have room for improvement in sebum-removing power. On the other hand, a skin cleansing composition containing a scrubbing agent as disclosed in Patent Document 3 is excellent in sebum-removing power because it scrubs the skin. However, since the skin is abraded by scrubbing, it has been found that there is a problem that a large burden is placed on the skin.

In view of the above-described problems, the present inventors have conducted repeated studies and found that (a) components such as polyglycerin fatty acid esters and polyglyceryl alkyl ethers exhibit high sebum solubility, and (b) a specific average particle size The present inventors have independently found that activated carbon has excellent affinity with sebum and adsorbs dissolved sebum. Based on these new findings, the inventors have completed the present invention, which can provide a skin cleanser composition having excellent sebum-removing power without imposing a heavy burden on the skin.

In particular, fatty acids and triglycerides are typical components of sebum, but it is found that sebum containing a large amount of fatty acids (also referred to as fatty acid-rich sebum) is more difficult to remove than sebum containing a large amount of triglycerides. The inventors have found. The present skin cleansing composition has the advantage of being able to easily remove fatty acid-rich sebum, which has been difficult to remove with conventional skin cleansing compositions.

[2. Skin Cleanser Composition]
A skin cleanser composition according to one embodiment of the present invention contains a component A and a component B, wherein the component A is activated carbon having an average particle size of 15 to 50 μm, and the component B is a polyglycerin fatty acid ester. , derivatives of monoglycerin fatty acid esters, derivatives of polyglycerin fatty acid esters, and polyglyceryl alkyl ethers.

In the present specification, "the skin cleansing composition according to one embodiment of the present invention" is also simply referred to as "the present skin cleansing composition". Each component contained in the present skin cleanser composition is described below.

(2-1. Component A)
Component A is activated carbon with an average particle size of 15-50 μm. As described above, component A can be said to be a component that adsorbs sebum dissolved by component B. Generally, the scrub agent is said to have an average particle size of 100 μm or more. On the other hand, activated carbon, which is component A contained in the present skin cleanser composition, has an average particle size of 50 μm or less. Therefore, component A does not function as a scrubbing agent and is not considered a scrubbing agent.

The activated carbon is, but not limited to, a porous carbonaceous substance. Activated carbon may contain hydrogen, oxygen, inorganic components, etc., in addition to carbon. The activated carbon can preferably be powdered activated carbon.

The raw material for the activated carbon is not particularly limited, and those commonly used as raw materials for activated carbon can be used. Specific examples include coconut shells, wood, sawdust, coal, phenolic resin, rayon, acrylonitrile, coal pitch, and petroleum pitch. Among them, coconut shell, wood, phenolic resin, and coal are preferred.

The average particle size of the activated carbon is preferably 15-50 μm, more preferably 18-45 μm, even more preferably 20-42 μm. When the average particle size of the activated carbon is within the above range, the obtained skin cleansing composition has excellent sebum-adsorbing power and does not contain a scrubbing agent, so that the skin is less burdened.

As used herein, the average particle size of activated carbon can be measured by a laser diffraction scattering method, for example, the number average size measured by a laser diffraction/scattering particle size analyzer “MT3300” (manufactured by Nikkiso Co., Ltd.). be able to.

The central pore diameter of the activated carbon is not particularly limited, but is preferably 0.1 to 10 nm, more preferably 0.5 to 2.0 nm, since the obtained skin cleansing composition has excellent sebum-removing ability. The central pore diameter of activated carbon is not particularly limited, but can be measured, for example, by the BET method, for example, by a pore size distribution analyzer "Belsorp" (manufactured by Bell Japan, Inc.).

The activated carbon can be produced by a known production method. For example, it can be produced by a known method of pulverizing and classifying activated carbon. Moreover, the activated carbon can also use a commercial item. Examples of commercially available products include, but are not limited to, trade name "Taiko A" (manufactured by Futamura Chemical Co., Ltd.) and trade name "Kuraray Coal (registered trademark)" (manufactured by Kuraray Chemical Co., Ltd.).

Component A may be used alone or in combination of two or more.

In one embodiment of the present invention, the content of Component A in 100% by mass of the skin cleanser composition is preferably 0.1% by mass to 25.0% by mass, and more preferably 0.2% by mass to 10.0% by mass. It is more preferably 0% by mass, and even more preferably 0.4% by mass to 1.5% by mass. When the content of component A is within the above range, the resulting skin cleanser composition will be more excellent in sebum-removing ability and less burden on the skin.

(2-2. Component B)
Component B is at least one selected from the group consisting of polyglycerin fatty acid esters, monoglycerin fatty acid ester derivatives, polyglycerin fatty acid ester derivatives and polyglyceryl alkyl ethers. As described above, component B can be said to be a component that dissolves sebum.

The fatty acid in component B may be a straight chain fatty acid or a branched chain fatty acid. Straight chain fatty acids include lauric acid, oleic acid, linoleic acid, palmitic acid, myristic acid, stearic acid, caprylic acid (octanoic acid), capric acid (decanoic acid), coconut oil fatty acid and the like. Branched chain fatty acids include isostearic acid and the like.

The fatty acid in component B preferably has 8 to 24 carbon atoms, more preferably 10 to 20 carbon atoms, because the resulting skin cleanser composition is more excellent in skin mildness and formulation stability. More preferably, it has 12 to 18 carbon atoms.

(Polyglycerol fatty acid ester)
Polyglycerin fatty acid esters are prepared from polyglycerin represented by the chemical formula HO--(CH ₂ --CH(OH)--CH ₂ --O) _m --H (where m is an integer of 2 or more) and one or more fatty acids. is an ester.

Polyglycerin fatty acid esters include diglycerin fatty acid esters (m=2) and triglycerin fatty acid esters (m=3) depending on m in the chemical formula. Examples of polyglycerin fatty acid esters include polyglycerin fatty acid monoesters composed of polyglycerin and one fatty acid and polyglycerin fatty acid diesters composed of polyglycerin and two fatty acids.

Polyglycerin fatty acid monoesters include, for example, diglyceryl monostearate, diglyceryl monooleate, diglyceryl monoisostearate, diglyceryl monocaprylate, diglyceryl sesquioleate, triglyceryl monocaprylate (also known as caprylic acid Polyglyceryl-3), tetraglyceryl monostearate, tetraglyceryl monooleate, tetraglyceryl monolaurate, hexaglyceryl monolaurate, hexaglyceryl monomyristate, hexaglyceryl monostearate, hexaglyceryl monooleate, hexaglyceryl monocaprate , decaglyceryl monolaurate (also known as polyglyceryl-10 laurate), decaglyceryl monomyristate, decaglyceryl monostearate, decaglyceryl monoisostearate, decaglyceryl monooleate, decaglyceryl monolinoleate, decaglyceryl monocaprylate , and so on. Polyglycerol fatty acid diesters include diglyceryl dioleate, decaglyceryl distearate, and decaglyceryl diisostearate. Polyglycerin fatty acid triesters include tetraglyceryl tristearate, hexaglyceryl tristearate, decaglyceryl tristearate, and decaglyceryl trioleate. Polyglyceryl fatty acid pentaesters include tetraglyceryl pentastearate, tetraglyceryl pentaoleate, hexaglyceryl pentastearate, and hexaglyceryl pentaoleate. In addition, polyglycerol fatty acid esters include poly(4-10) glyceryl monolaurate, poly(2-10) glyceryl monostearate, poly(2-10) glyceryl diisostearate, poly(6-10) glyceryl distearate, Diglyceryl triisostearate, poly(10)glyceryl tristearate and the like can also be mentioned.

Polyglycerol fatty acid monoesters are commercially available. Examples of such commercial products include "Sunsoft M-12J", which is polyglyceryl-10 laurate (both manufactured by Taiyo Kagaku Co., Ltd.).

As the polyglycerin fatty acid ester, it is preferable to use a polyglycerin fatty acid monoester because the obtained skin cleanser composition is more excellent in skin mildness and formulation stability. Here, the formulation stability is intended to suppress precipitation of crystals such as salts.

The average degree of polymerization of polyglycerin in the polyglycerol fatty acid ester is preferably 2-10, more preferably 6-10, because the resulting skin cleanser composition is more excellent in skin mildness and formulation stability.

(Derivatives of Monoglycerin Fatty Acid Esters and Derivatives of Polyglycerin Fatty Acid Esters)
As used herein, "monoglycerin fatty acid ester" intends an ester consisting of glycerin represented by the chemical formula HO--CH ₂ --CH(OH)-- _{CH 2} --OH and one or more fatty acids. Derivatives of monoglycerol fatty acid esters are obtained by combining (eg addition polymerizing or condensing) monoglycerol fatty acid esters with one or more optional compounds. The polyglycerin fatty acid ester derivative is obtained by combining (for example, adding or condensing) the polyglycerin fatty acid ester described in the section (Polyglycerin fatty acid ester) with one or more arbitrary compounds. Examples of the optional compounds include alcohols having a hydroxy group, ethylene oxides such as polyoxyethylene represented by the chemical formula H—(OCH ₂ CH ₂ ) _n —OH (wherein n is an integer of 2 or more), and the like. . The valence of the alcohol is not particularly limited, and it may be glycol, which is a dihydric alcohol, or may be a polyhydric alcohol. Polyoxyethylene is sometimes referred to as polyethylene glycol and is also a dihydric alcohol.

Derivatives of monoglycerin fatty acid esters include, for example, (a) condensates of fatty acid monoglycerides (also referred to simply as monoglycerides) consisting of glycerin and one fatty acid and polyoxyethylene (polyethylene glycol), and (b) A condensate of a fatty acid diglyceride consisting of glycerin and two fatty acids (also simply referred to as a diglyceride) with polyoxyethylene (polyethylene glycol), and the like. In both cases (a) and (b), dehydration condensation occurs between the hydroxy group of the monoglycerin fatty acid ester and the hydroxy group of the polyoxyethylene, and the monoglycerol is obtained by ether-bonding the polyoxyethylene. Derivatives of fatty acid esters are produced.

Further specific examples of derivatives of monoglycerol fatty acid esters include polyoxyethylene glyceryl monostearate, polyoxyethylene glyceryl monooleate, polyoxyethylene glyceryl monoisostearate and polyoxyethylene glyceryl triisostearate. be done.

Polyoxyethylene glyceryl monoisostearate includes various compounds depending on the number of oxyethylene units in the polyoxyethylene (the value of n in the above chemical formula). Examples include PEG-10 glyceryl isostearate, which is polyoxyethylene glyceryl monoisostearate with 10 oxyethylene units, and PEG-20 glyceryl isostearate, which is polyoxyethylene glyceryl monoisostearate with 20 oxyethylene units. be done.

Derivatives of polyglycerin fatty acid esters include, for example, condensates of polyglycerin fatty acid esters and polyoxyethylene (polyethylene glycol).

(polyglyceryl monoalkyl ether)
Polyglyceryl alkyl ether is obtained by ether-bonding polyglycerol and one alkyl. Polyglyceryl alkyl ethers specifically have the following general formula (1):

(In general formula (1) above, R ¹ is a substituted or unsubstituted alkyl group, and p is an integer of 2 or more.)
The alkyl group for R ¹ is preferably an alkyl group having 6 to 22 carbon atoms, more preferably an alkyl group having 8 to 18 carbon atoms, because the resulting skin cleanser composition is more excellent in skin mildness and formulation stability. is more preferably an alkyl group having 8 to 16 carbon atoms. The alkyl group may be linear, branched, or cyclic. The alkyl may be partially substituted or unsubstituted. When a portion of the alkyl is substituted, the substituents include hydroxy groups, amino groups, and the like.

Specific examples of alkyl groups for R ¹ include hexyl group, heptyl group, octyl group (also known as capryl group), nonyl group, decyl group, undecyl group, dodecyl group (also known as lauryl group), tridecyl group, and tetradecyl. linear alkyl groups such as a group (alias; myristyl group), pentadecyl group, hexadecyl group (alias; palmityl group), heptadecyl group, octadecyl group (alias; stearyl group), nonadecyl group, icosyl group, henicosyl group, docosyl group, 2-ethylhexyl group, 2-methylheptyl group, 2-methylnonyl group, 2-octyldecyl group, 3,5,5-trimethylhexyl group, branched chain alkyl groups such as isostearyl group, cyclic alkyl groups such as cyclohexyl group, etc.

p in the general formula (1) is an integer of 2 or more, and the degree of polymerization of the glycerin unit of the polyglycerin is preferably 3 to 25, more preferably 3 to 20, and more preferably 4 to 20. More preferably, it is particularly preferably 4-10.

Polyglyceryl alkyl ethers are commercially available. Examples of such commercial products include polyglyceryl-4 lauryl ether “Sun-Eather L-4” and polyglyceryl-10 lauryl ether “Sun-Eather L-10” (both manufactured by Taiyo Kagaku Co., Ltd.). be done. Polyglyceryl-4 lauryl ether is a polyglyceryl alkyl ether in which R ¹ is a lauryl group (12 carbon atoms) and p is 4 in general formula (1). Polyglyceryl-10 lauryl ether is a polyglyceryl alkyl ether in which R ¹ is a lauryl group (12 carbon atoms) and p is 10 in general formula (1).

Component B preferably comprises at least polyglyceryl alkyl ether. According to the above constitution, the obtained skin cleansing composition has an advantage of being superior in sebum-dissolving power.

Component B may be used alone or in combination of two or more.

In one embodiment of the present invention, the content of Component B in 100% by mass of the skin cleanser composition is preferably 0.01% by mass to 10.0% by mass, and more preferably 0.03% by mass to 5.0% by mass. It is more preferably 0% by mass. When the content of component B is within the range described above, the obtained skin cleanser composition has excellent sebum solubility, that is, sebum-removing power.

(2-3. Component C)
It is preferable that the present skin cleanser composition further contains a surfactant other than the component B as the component C. When the present skin cleansing composition further contains component C, it is possible to produce a cream-shaped foam having moderate hardness and to stably retain the foam. It also improves detergency.

Component C surfactants include nonionic surfactants (nonionic surfactants) other than component B, anionic surfactants, cationic surfactants, amphoteric surfactants, silicone surfactants and Fluorinated surfactants can be mentioned. Nonionic surfactants include lipophilic nonionic surfactants and hydrophilic nonionic surfactants.

Lipophilic nonionic surfactants other than component B include, for example, sorbitan fatty acid esters (e.g., sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate, etc.); glycerin, glyceryl monostearate, α,α'-pyroglutamic acid glyceryl oleate, glyceryl monostearate malic acid, etc.); propylene glycol fatty acid esters (eg, propylene glycol monostearate, etc.); hydrogenated castor oil derivatives; glycerin alkyl ether and the like.

Examples of hydrophilic nonionic surfactants other than component B include POE-sorbitan fatty acid esters (e.g., POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, etc.); POE sorbitol fatty acid esters (e.g., POE-sorbitol monolaurate, POE-sorbitol monooleate, POE-sorbitol pentaoleate, POE-sorbitol monostearate, etc.); POE-fatty acid esters ( POE-distearate, POE-monodioleate, ethylene glycol distearate, etc.); POE-alkyl ethers (eg, POE-lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyl dodecyl ether, POE-cholestanol ether, etc.); Pluronic types (e.g., Pluronics, etc.); POE POP-alkyl ethers (e.g., POE POP-cetyl ether, POE POP-2-decyltetradecyl ether, POE POP-monobutyl ether, POE-POP-hydrogenated lanolin, POE-POP-glycerin ether, etc.); tetra-POE-tetraPOP-ethylenediamine condensates (e.g., Tetronic, etc.); For example, POE-castor oil, POE-hydrogenated castor oil, POE-hydrogenated castor oil monoisostearate, POE-hydrogenated castor oil triisostearate, POE-hydrogenated castor oil monopyroglutamic acid monoisostearate, POE-hydrogenated castor oil maleic acid, etc.); POE-beeswax/lanolin derivatives (e.g., POE-sorbite beeswax, etc.); alkanolamides (e.g., coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc.); POE-propylene glycol fatty acid POE-alkylamine; POE-fatty acid amide; sucrose fatty acid ester; alkylethoxydimethylamine oxide; trioleyl phosphate and the like. The "POE" means "polyoxyethylene", and the "POP" means "polyoxypropylene".

Examples of anionic surfactants include higher alkyl sulfate salts (eg, sodium lauryl sulfate, potassium lauryl sulfate, etc.); alkyl ether sulfate ester salts (eg, POE-triethanolamine lauryl sulfate, POE-sodium lauryl sulfate, etc.). ); N-acyl sarcosinate (e.g., sodium lauroyl sarcosinate, etc.); phosphate ester salts (POE-sodium oleyl ether phosphate, POE-stearyl ether phosphate, etc.); sulfosuccinates (e.g., di-2-ethylhexyl sulfosuccinate monolauroyl monoethanolamide sodium polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, etc.); sulfonic acid, etc.); higher fatty acid ester sulfate (e.g., hydrogenated coconut oil fatty acid sodium glycerol sulfate, etc.); monosodium L-glutamate, etc.); sulfated oil (e.g., funnel oil, etc.); POE-alkyl ether carboxylic acid; POE-alkyl allyl ether carboxylate; α-olefin sulfonate; higher fatty acid alkylolamide sulfate; sodium lauroyl monoethanolamide succinate; N-palmitoyl aspartic acid ditriethanolamine; sodium caseinate;

Examples of cationic surfactants include alkyltrimethylammonium salts (e.g., stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (e.g., cetylpyridinium chloride, etc.); distearyldimethylammonium chloride dialkyldimethylammonium salts; poly(N,N'-dimethyl-3,5-methylenepiperidinium) chloride; alkyl quaternary ammonium salt; alkyldimethylbenzylammonium salt; alkylisoquinolinium salt; dialkylmorphonium salt; POE-alkylamine alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride;

Amphoteric surfactants include, for example, glycine-type amphoteric surfactants, aminopropionic acid-type amphoteric surfactants, imidazoline-based amphoteric surfactants (e.g., 2-undecyl-N,N,N-(hydroxyethylcarboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.); betaine surfactants (e.g., 2-heptadecyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkylbetaine, amidobetaine, sulfobetaine, etc.).

Component C may be used alone or in combination of two or more.

In one embodiment of the present invention, the content of Component C in 100% by mass of the skin cleanser composition is preferably 20% by mass to 50% by mass, more preferably 25% by mass to 40% by mass. It is preferably 30% by mass to 35% by mass, and more preferably 30% by mass to 35% by mass. When the content of component C (a) is 20% by mass or more in 100% by mass of the skin cleansing composition, the skin cleansing composition produces a cream-shaped foam having moderate hardness without being too soft. (b) when the content is 50% by mass or less, cream-shaped foam having an appropriate hardness without being too hard can be produced with the skin cleanser composition. Furthermore, the foam can be stably retained.

(2-4. Component D)
This skin cleanser composition preferably further contains a polyhydric alcohol as Component D. The present skin cleanser composition further contains component D (polyhydric alcohol), so that it has a moisturizing effect capable of moisturizing the skin after cleansing.

Component D (polyhydric alcohol) includes ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, polyethylene glycol, 1,3-butylene glycol (also known as 1,3-butanediol), 1 , 2-butanediol, 1,2-decanediol, glycerin (also known as 1,2,3-propanetriol), concentrated glycerin, diglycerin, triglycerin, polyglycerin, glucose, maltose, maltitol, sucrose, mannitol, sorbitol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, polyoxyethylene methyl glucoside and polyoxypropylene methyl glucoside, and the like.

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

In one embodiment of the present invention, the content of component D is preferably 0.1% by mass to 50.0% by mass, more preferably 1.0% by mass to 40.0% by mass, based on 100% by mass of the skin cleanser composition. It is more preferably 0% by mass. When the content of component D is within the above range, the obtained skin cleansing composition has a more excellent moisturizing effect.

(2-5. Other components)
The skin cleanser composition may contain other components in addition to the components A to D as long as the effect of one embodiment of the present invention is not impaired.

Other ingredients include ingredients that may be commonly included in facial cleansers and pharmaceuticals. Other ingredients include, for example, moisturizers, powder ingredients, oils and fats, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, synthetic ester oils, fatty acid ester oils, silicone oils, silicone compounds, natural water-soluble polymers, semi- Synthetic water-soluble polymers, synthetic water-soluble polymers, cationic polymers, thickening polymers, thickeners, UV absorbers, UV inhibitors, vitamin compounds, sequestering agents, lower alcohols, monosaccharides, oligosaccharides, Polysaccharides, amino acids, organic amines, polymer emulsions, pH adjusters, antioxidants, antioxidant aids, preservatives, anti-inflammatory agents, whitening agents, activators, blood circulation promoters, antiseborrheic agents, anti-inflammatory agents, cooling agents agents (also known as cooling agents), bactericidal ingredients, antiperspirant ingredients, animal extracts, plant extracts, various extracts, pearlizing agents, fragrances, and the like.

Humectants include trimethylglycine, glucose, sorbitol, maltitol and the like. Examples of powder components include organic powders such as nylon powder; inorganic powders such as silica, chlorohydroxyaluminum and talc; coloring agents; and pigments. Oils and fats include orange oil, camellia oil, avocado oil, argan oil, olive oil, rice bran oil, soybean oil, corn oil, palm kernel oil, palm oil, castor oil, grape seed oil, kukui nut oil, macadamia nut oil, meadowhome oil. , sunflower oil and the like. Fats and oils may be liquid fats and oils, and solid fats and oils may be sufficient as them. Examples of fatty acid ester oils include isopropyl myristate, ethylhexyl palmitate, and cetyl 2-ethylhexanoate. Silicone oils include cyclopentasiloxane, hydrogen dimethicone, caprylyl methicone, dimethicone and the like. Cationic polymers include acrylamide-acrylic acid-dimethyldiallylammonium chloride copolymer, dimethyldiallylammonium chloride-acrylic acid copolymer, dimethyldiallylammonium chloride-acrylamide copolymer and the like. Examples of viscosity-increasing polymers include carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, hydroxyethyl cellulose, and xanthan gum. Antioxidants include tocopherol, dibutylhydroxytoluene and the like. Examples of antiseptics include phenoxyethanol, octoxyglycerin, methylparaben, paraoxybenzoic acid esters, etc. Whitening agents include arbutin, ascorbic acid, and the like. Examples of anti-inflammatory agents include dipotassium glycyrrhizinate and stearyl glycyrrhizinate. Cooling agents include menthol, menthyl glyceryl ether, camphor, peppermint oil, and the like. Bactericidal components include benzalkonium chloride, benzethonium chloride, chlorhexidine hydrochloride, phenol, trichlorocarbanilide, chlorhexidine gluconate, isopropylmethylphenol, triclosan, salicylic acid, sorbic acid, lysozyme chloride, and the like. Antiperspirant components include aluminum chloride, aluminum potassium sulfate, aluminum sulfate, aluminum acetate, chloroaluminum, allantoin chlorohydroxyaluminum, and zinc paraphenolsulfonate. Examples of plant extracts include peony, botanpi, loquat, and aloe.

Other components can be appropriately blended in appropriate amounts depending on the application and purpose. As other components, only one type may be used, or two or more types may be used in combination.

The skin cleanser composition preferably does not substantially contain particles having an average particle size of 100 µm or more. The above configuration means that it does not contain a scrubbing agent, and according to this configuration, the present skin cleansing composition has the advantage of not imposing a large burden on the skin (that is, having a low load).

(2-6. Other details of skin cleanser composition)
In the present skin cleanser composition, water is used as the balance other than the components described above. Water is not particularly limited as long as it can be used as a cleaning agent raw material, but purified water is usually used. In one embodiment of the present invention, the content of water in 100% by mass of the skin cleanser composition is preferably 50% by mass to 89% by mass, more preferably 60% by mass to 80% by mass. .

The present skin cleanser composition can be obtained by blending water, component A and component B, and optionally component C, component D and other components. Specifically, the present skin cleanser composition can be obtained, for example, by mixing the above components and stirring using a known mixing device such as a propeller mixer, disper mixer, paddle mixer, and the like.

The present skin cleanser composition is suitably used for cleansing the skin, for example, as a facial cleanser. The present skin cleanser composition is not particularly limited, but can be used for cleaning the scalp ( shampoo) , body (body soap), hands (hand soap), etc., in addition to facial cleansing.

The properties of the present skin cleanser composition include solid, liquid, gel, emulsion, and cream.

The product form of the skin cleanser composition 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 of the gel composition, 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. For example, in Tables 1 and 2, unless otherwise specified, the compounding amount is represented by "% by mass", and all compounding components are converted to pure content. All the evaluations were carried out under constant conditions of constant temperature and humidity of 23° C. and humidity of 60%.

The components used in each example and each comparative example are shown below.

[Component A]
Activated carbon (trade name “Kuraray Coal (registered trademark)”; manufactured by Kuraray Chemical Co., Ltd.; average particle size, 35.40 μm)
[Component B]
Polyglyceryl-4 lauryl ether (trade name “Sun Eisa L-4”, manufactured by Taiyo Kagaku Co., Ltd.)
Polyglyceryl-3 caprylate (manufactured by Taiyo Kagaku Co., Ltd.)
Polyglyceryl-10 laurate (trade name “Sunsoft M-12J”, manufactured by Taiyo Kagaku Co., Ltd.)
PEG-10 glyceryl isostearate PEG-20 glyceryl isostearate [Component C]
Lauric acid (carbon number = 12)
Myristic acid (carbon number = 14)
Palmitic acid (carbon number = 16)
Stearic acid (carbon number = 18)
[Component D]
Polyethylene glycol (number average molecular weight, 190-210)
[Other ingredients]
Sodium polyoxyethylene lauryl ether sulfate (trade name “Emar 125HP”, manufactured by Kao Corporation)
Dioleth-8 sodium phosphate (sodium polyoxyethylene oleyl ether phosphate) (trade name “NIKKOL DOP-8NV”, manufactured by Nikko Chemicals Co., Ltd.)
Glycerin Glyceryl monostearate Potassium hydroxide [water]
purified water.

Evaluation methods performed in each example and each comparative example are shown below.

[Evaluation method for sebum stain removal evaluation]
A model sebum was prepared by blending fatty acids, lipids and squalene. The proportion of fatty acids in model sebum 10 model sebum was 30% by mass with respect to 100% by mass of model sebum. 0.1 parts by mass of a red staining solution (Oil Red O Solution, manufactured by Cosmo Bio Co., Ltd.) was added to 1000 parts by mass of the model sebum to dye the model sebum red. Next, the model sebum was heated to 60° C. to liquefy, and a keratin cloth (15 mm×15 mm) was immersed in the liquefied model sebum for 1 second. Next, the keratin cloth after being immersed in the model sebum was allowed to stand at 35° C. for 12 hours or more to dry.

Next, 100 mL of the skin cleansing composition of each example and comparative example was placed in a container, and the skin cleansing composition was warmed to 40°C. Next, the keratin cloth after model sebum immersion was immersed in the skin cleanser composition. Next, the keratin cloth was washed by shaking the container containing the keratin cloth for 15 minutes using a shaker (SHAKING BATH SB-20, manufactured by Inai Co., Ltd.) at a frequency of 100 rpm and an amplitude of 15 mm. Here, the skin cleanser composition in the container was kept at 40°C by heating during shaking (washing).

The keratin cloth was then removed from the container and dried at 25°C for 12 hours. Regarding the degree of adherence of model sebum, that is, the degree of color of the keratin cloth, the model sebum removal rate was obtained by visually confirming the keratin cloth after washing and drying and the keratin cloth before washing.

[Evaluation criteria for sebum stain removal evaluation]
◎More than 90% of the keratin cloth area is white ○More than 50% and less than 90% of the keratin cloth area is white ×More than 50% of the keratin cloth area is red.

[Examples 1 to 10, Comparative Examples 1 and 2]
Each component was blended according to the composition shown in Table 1 to prepare skin cleansing compositions of Examples 1 to 10 and Comparative Examples 1 and 2. Each skin cleanser composition was evaluated for sebum stain removal, which will be described later. The evaluation results are shown in Table 1, respectively.

From the sebum stain removal evaluation results shown in Table 1, it can be seen that the skin cleansing compositions of Examples 1 to 10 are superior to the skin cleansing compositions of Comparative Examples 1 and 2 in sebum removing power.

[Examples 11 to 13, Comparative Examples 3 and 4]
Each component was blended according to the composition shown in Table 2 to prepare skin cleansing compositions of Examples 11 to 13 and Comparative Examples 3 and 4. Each skin cleanser composition was evaluated for sebum stain removal, which will be described later. The evaluation results are shown in Table 2, respectively.

From the sebum stain removal evaluation results shown in Table 2, it can be seen that the skin cleansing compositions of Examples 11 to 13 are superior to the skin cleansing compositions of Comparative Examples 3 and 4 in sebum removing power.

Formulation examples of the skin cleanser composition of the present invention are shown in Tables 3 to 5 below. In addition, a compounding quantity represents "mass %."

The skin cleansing composition according to one embodiment of the present invention has excellent sebum-removing power without imposing a heavy burden on the skin. Therefore, the skin cleanser composition according to one embodiment of the present invention can be suitably used for cleaning the scalp, face, body, hands, and the like.

Claims (4)

Skin cleanser composition containing component A and component B:
The component A is activated carbon having an average particle size of 15 to 50 μm,
The component B is at least one component selected from the group consisting of polyglycerin fatty acid ester, PEG-10 glyceryl monoisostearate, PEG-20 glyceryl monoisostearate, and polyglyceryl alkyl ether ,
The average degree of polymerization of polyglycerin in the polyglycerin fatty acid ester is 6 to 10,
The fatty acid in component B is selected from the group consisting of lauric acid, linoleic acid, palmitic acid, myristic acid, stearic acid, caprylic acid (octanoic acid), capric acid (decanoic acid), coconut oil fatty acid, and isostearic acid,
In 100% by mass of the skin cleanser composition,
The content of the component A is 0.01% by mass to 5% by mass,
The content of component B is 0.03% by mass to 5% by mass . 2. The skin cleanser composition according to claim 1, further comprising a surfactant other than said component B as component C. 3. The skin cleanser composition according to claim 1 or 2, wherein said component B comprises at least polyglyceryl alkyl ether. The skin cleanser composition according to any one of claims 1 to 3, which does not contain particles having an average particle size of 100 µm or more.