WO2022185819A1 - Skin cleaning agent composition - Google Patents

Abstract

A skin cleaning agent composition containing (A) an anionic surfactant, (B) at least one plant extract selected from among an extract of Sasa kurilensis and a water extract of mint, and (C) at least one polyhydric alcohol selected from among glycerin, 1,3-butylene glycol, and propylene glycol, wherein the mass ratio [(C)/(B)] of the content amount of the ingredient (C) relative to the content amount of the ingredient (B) is 3-30.

Description

skin cleanser composition

The present invention relates to a skin cleanser composition.

Skin cleansing compositions used for washing hands are required not only to have excellent foam quality, feel after washing, no irritation to hand skin, and stability, but also to have high bactericidal activity. Conventionally, many synthetic chemical substances have been used as bactericidal components (see Patent Documents 1 and 2, for example). However, the compounding conditions and compounding amounts of the synthetic chemical substances are generally determined from the viewpoint of safety and skin irritation. In addition, since indigenous bacteria that enhance the barrier function on the skin are also sterilized, there is a problem that repeated washing with a skin cleanser composition with a high sterilization effect causes rough and dry skin on the hands. rice field.

Therefore, plant-derived antibacterial ingredients that are gentle on the skin of the hands are in demand. However, the extract obtained by the method of extracting with organic solvents such as alcohol, which is a general extraction method of plants, and the method of extracting by acid treatment or alkali treatment, causes decomposition and aggregation of the active ingredients, color and Due to the generation of a peculiar offensive odor, there are restrictions on the conditions for blending in cosmetics such as skin cleansing compositions. In addition, the plant extract has a low bactericidal power, and even if it is blended in a skin cleanser composition, there is a problem that the same bactericidal power as that of the synthetic chemical substance cannot be obtained.

Therefore, while maintaining the indigenous bacteria that enhance the barrier function on the skin, it has high sterilization power against pathogenic E. coli, etc., has no coloration, has a good appearance, has no unpleasant odor, and foams. It would be highly desirable to provide a skin cleanser composition that is superior in quality, feel after cleansing, non-irritation to the hands, and stability.

WO2011/043226 Japanese Patent Application Laid-Open No. 2006-182698

The object of the present invention is to solve the above-mentioned problems in the past and to achieve the following objects. That is, the present invention maintains indigenous bacteria that enhance the barrier function on the skin, has high bactericidal activity against pathogenic E. coli, etc., has no coloration, has a good liquid appearance, and has an unpleasant odor. To provide a skin cleanser composition excellent in foam quality, feeling after cleansing, non-irritating hand skin, and stability.

The inventors of the present invention have conducted intensive studies to achieve the above object, and found that the skin cleanser composition contains (A) an anionic surfactant, and (B) an extract selected from Sasa extract and mint water extract. and (C) at least one polyhydric alcohol selected from glycerin, 1,3-butylene glycol, and propylene glycol, and containing the component (B) By setting the mass ratio [(C)/(B)] of the content of the component (C) to the amount of 3 to 30, the indigenous bacteria that enhance the barrier function on the skin are maintained while maintaining pathogenicity. It should have high bactericidal activity against Escherichia coli, etc., should have good liquid appearance without discoloration, should have no offensive odor, and should have excellent foam quality, feel after washing, no irritation to hands and skin, and stability. I found out.

The present invention is based on the findings of the present inventors, and means for solving the above problems are as follows. Namely
<1> (A) an anionic surfactant;
(B) at least one plant extract selected from extracts of Sasa squamosa and water extracts of mint;
(C) at least one polyhydric alcohol selected from glycerin, 1,3-butylene glycol, and propylene glycol;
and wherein the mass ratio [(C)/(B)] of the content of component (C) to the content of component (B) is 3 to 30 be.
<2> The skin cleanser composition according to <1> above, wherein the extract of component (B) is Sasa serrata water and the aqueous mint extract of component (B) is peppermint oil.
<3> The content of component (A) is 5% by mass to 12% by mass,
The content of the extract of component (B) is 0.5% by mass to 1.2% by mass, and the content of the water extract of component (B) is 0.2% by mass to 0.2% by mass. 5% by mass,
The skin cleanser composition according to any one of <1> to <2> above, wherein the component (C) is 5% by mass to 10% by mass.
<4> (D) The skin cleanser composition according to any one of <1> to <3>, further comprising an amphoteric surfactant.
<5> The skin cleanser composition according to <4> above, wherein the content of component (D) is 0.5% by mass to 4% by mass.

According to the present invention, it is possible to solve the above-mentioned problems in the past and achieve the above-mentioned objects. To provide a skin cleansing agent composition which is effective, has no coloration, good liquid appearance, no unpleasant odor, excellent foam quality, feel after cleansing, no irritation to hands and skin, and excellent stability. can.

(Skin cleanser composition)
The skin cleansing composition of the present invention comprises (A) an anionic surfactant, (B) at least one plant extract selected from extracts of S. japonica and water extracts of mint, (C) glycerin, 1,3-butylene glycol, and at least one polyhydric alcohol selected from propylene glycol, preferably further containing (D) an amphoteric surfactant, and if necessary, other Contains ingredients.

<(A) anionic surfactant>
The anionic surfactant as the component (A) is mainly contained in order to improve foam quality, feeling after washing, and bactericidal activity against E. coli.

The anionic surfactant of component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. Salts, amino acid-based surfactants and the like are included. These may be used individually by 1 type, and may use 2 or more types together. Among these, higher fatty acid salts are preferred from the viewpoints of foam quality, feel after washing, and bactericidal activity against Escherichia coli.

-Higher Fatty Acid Salt-
The higher fatty acid salt in the component (A) is not particularly limited and can be appropriately selected depending on the purpose. Examples include laurate, myristate, palmitate, stearate, etc. mentioned. These may be used individually by 1 type, and may use 2 or more types together. Among these, higher fatty acid salts containing both laurate and myristate are preferred.

The counter ion of the higher fatty acid salt is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include alkali metal salts, amine salts and amino acid salts.
The alkali metal salt is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include sodium salt and potassium salt.
The amine salt is not particularly limited and can be appropriately selected depending on the purpose. Examples include ammonium salt; monoethanolamine salt, diethanolamine salt, triethanolamine salt, and alkanolamine salts such as -amino-2-methylpropanediol.
The amino acid salt is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include lysine salts and arginine salts.
Among these, alkali metal salts are preferred, and potassium salts are particularly preferred, from the viewpoint of excellent foam elasticity.

As the higher fatty acid salt, an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available higher fatty acid salts include, for example, trade names of NIKKOL potassium laurate LK-120 (potassium laurate), NIKKOL potassium myristate MK-140 (potassium myristate), Thai Soap MNK-40 (coconut oil fatty acid), Potassium/potassium myristate mixed liquid (manufactured by Nikko Chemicals Co., Ltd.) and the like.

The higher fatty acid salt can be blended as a higher fatty acid salt, but the higher fatty acid and the counterion salt such as potassium hydroxide are separately added to a blending tank and neutralized. may be used as a higher fatty acid salt.

The higher fatty acid used for preparing the higher fatty acid salt may be appropriately synthesized or a commercially available product.
Commercially available higher fatty acids include, for example, NAA (registered trademark)-122 (lauric acid), NAA (registered trademark)-142 (myristic acid), and NAA (registered trademark)-160 (palmitic acid). , NAA (registered trademark)-180 (stearic acid) (manufactured by NOF Corporation), Kortacid 1299 (lauric acid), Kortacid 1499 (myristic acid) (manufactured by Pacific Oleochemicals) and the like.

The content of the laurate is not particularly limited and can be appropriately selected depending on the intended purpose. ~10% by mass is more preferred.

The content of the myristate salt is not particularly limited and can be appropriately selected depending on the intended purpose. % to 8% by mass is more preferred.

The content of the palmitate is not particularly limited and can be appropriately selected depending on the intended purpose. ~9% by mass is more preferred.

The content of the stearate is not particularly limited and can be appropriately selected depending on the purpose. .2% by mass to 1% by mass is more preferred.

- Polyoxyethylene Alkyl Ether Sulfate -
The polyoxyethylene alkyl ether sulfate in the component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. For example, compounds represented by the following general formula (A1) mentioned. The said polyoxyethylene alkyl ether sulfate may be used individually by 1 type, and may use 2 or more types together.

In general formula (A1), R ¹ represents an alkyl group, and the alkyl group portion preferably has 10 to 14 carbon atoms.

In the general formula (A1), n represents the average added mole number of ethylene oxide (E.O.), and the average added mole number of ethylene oxide is preferably 1 to 5.

In the general formula (A1), X represents an alkali metal or ammonium.
The alkali metal is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include sodium and potassium.

Specific examples of the polyoxyethylene alkyl ether sulfate include polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (2) sodium lauryl ether sulfate (also known as POE (2) sodium laureth sulfate), polyoxyethylene (3) sodium lauryl ether sulfate (also known as POE (3) sodium laureth sulfate), polyoxyethylene (4) sodium lauryl ether sulfate, polyoxyethylene (5) sodium lauryl ether sulfate, polyoxyethylene (3) alkyl (C12 , 13) sodium ether sulfate, polyoxyethylene (2) ammonium lauryl ether sulfate, polyoxyethylene (3) ammonium lauryl ether sulfate, and the like.
In addition, the numerical value in said () represents the average addition mole number (n) of ethylene oxide (E.O.).

As the polyoxyethylene alkyl ether sulfate, an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available polyoxyethylene alkyl ether sulfates include, for example, Emal 20C (polyoxyethylene (3) sodium lauryl ether sulfate), Emal 270J (polyoxyethylene (2) sodium lauryl ether sulfate), Emal 20CM (poly Oxyethylene (3) alkyl (C12,13) sodium ether sulfate), Emal 125HP (polyoxyethylene (1) sodium lauryl ether sulfate) (manufactured by Kao Corporation), Alscope (registered trademark) DA-330S (poly Oxyethylene (3) alkyl (C12,13) sodium ether sulfate), Alscope (registered trademark) A-225B (polyoxyethylene (2) ammonium lauryl ether sulfate) (manufactured by Toho Chemical Industry Co., Ltd.), Shinoline SPE- 1150 (polyoxyethylene (1) sodium lauryl ether sulfate), Shinoline SPE-1250 (polyoxyethylene (2) sodium lauryl ether sulfate), Shinoline SPE-1350 (polyoxyethylene (3) sodium lauryl ether sulfate) (above, New Japan Chemical Co., Ltd.), Texapon (registered trademark) N70 (polyoxyethylene (2) sodium lauryl ether sulfate) (manufactured by BASF), and the like.

- Ether carboxylate -
The ether carboxylate in the component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. is mentioned. The ether carboxylates may be used singly or in combination of two or more.

In the general formulas (A2) and (A3), R ² is a linear or branched alkyl group or alkenyl group having 5 to 23 carbon atoms, or a linear or branched alkyl group or alkenyl group having 5 to 23 carbon atoms represents a phenyl group substituted with a group, and the number of carbon atoms in the R ² moiety is preferably 10 to 14.

In general formula (A2), R ³ represents an alkylene group having 2 to 4 carbon atoms, and the number of carbon atoms in the R ³ moiety is preferably 2. Each R ³ may be the same or different.

In the general formula (A2), o represents an average added mole number of 1 to 20 alkylene oxide, and the average added mole number of the alkylene oxide is preferably 1 to 5.

In general formulas (A2) and (A3), M1 represents ^a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or a basic amino acid.

Specific examples of the ether carboxylate represented by the general formula (A2) or (A3) include polyoxyethylene (3) sodium lauryl ether acetate, polyoxyethylene (4) potassium lauryl ether acetate, and sodium lauryl glycol acetate. etc.
In addition, the numerical value in said () represents the average added mole number (o) of alkylene oxide.

The ether carboxylate may be appropriately synthesized or may be a commercially available product.
Examples of commercially available ether carboxylates include Enagicol EC-30 (polyoxyethylene (3) sodium lauryl ether acetate, manufactured by Lion Specialty Chemicals Co., Ltd.), Beaulite LCA-25F (polyoxyethylene (3 ) Sodium lauryl ether acetate), Beaulite LCA-30D (polyoxyethylene (3) sodium lauryl ether acetate), Beaulite LCA-H (polyoxyethylene (4) lauryl ether acetic acid), Beaulite LCA-25NH (Laureth- 4 carboxylic acid), Beaulite SHAA (sodium lauryl glycol carboxylate), Beaulite LCA (polyoxyethylene (3) sodium lauryl ether acetate) (manufactured by Sanyo Chemical Industries, Ltd.), Kao Akipo RLM-45NV (polyoxyethylene (4.5) sodium lauryl ether acetate), Kaoakipo RLM-100NV (polyoxyethylene (10) sodium lauryl ether acetate) (manufactured by Kao Corporation), and the like.
In addition, the numerical value in said () represents the average added mole number (o) of alkylene oxide.

-Amino acid-based surfactant-
The amino acid-based surfactant in the component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include compounds represented by the following general formula (A4). . The amino acid-based surfactants may be used singly or in combination of two or more.

In the general formula (A4), R ⁴ is substituted with a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms, or a linear or branched alkyl or alkenyl group having 5 to 23 carbon atoms. The number of carbon atoms in the R ⁴ moiety is preferably 8 to 18.

In general formula (A4), R ⁵ represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms.

In general formula (A4), R ⁶ and R ⁷ represent a hydrogen atom or -(CH ₂ ) _m -COOM ² . Said R6 and said ^R7 may be the ^same or different.

In the general formula (A4), m and n represent numbers from 0 to 20. Said m and said n may be the same or different.

In general formula (A4), M ¹ and M ² represent a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or a basic amino acid. The M ¹ and the M ² may be the same or different.

The amino acid structure of the hydrophilic portion of the amino acid-based surfactant is not particularly limited and can be appropriately selected depending on the purpose, but glycine, glutamic acid, and methylalanine are preferred.

Specific examples of the amino acid-based surfactant represented by the general formula (A4) include N-cocoyl-glycine potassium (N-coconut fatty acid acylglycine potassium), N-cocoyl-glycine sodium (N-coconut fatty acid N-acyl-glycine such as sodium acylglycinate) and salts thereof; N-acyl-N-carboxyethyl-glycine such as sodium N-myristoyl-N-carboxyethyl-glycine and salts thereof; sodium N-myristoyl-L-glutamate , N-lauroyl-L-sodium glutamate, potassium N-myristoyl-L-glutamate, potassium N-cocoate acyl-L-glutamate, N-cocoate acyl-L-sodium glutamate, N-palm acyl-L - N-acylglutamic acid and its salts such as sodium glutamate, sodium N-stearoyl-L-glutamate; N-lauroyl-N-methyl-β-alanine potassium, lauroylmethyl-β-alanine sodium, N-lauroyl-N-methyl - N-acyl-N-methyl-β-alanine such as β-alaninetriethanolamine, sodium cocoate methylalanine, N-cocoate acyl-DL-alaninetriethanolamine and salts thereof; N-cocoyl-β -N-acyl-β-alanine such as alanine triethanolamine and salts thereof; acyl sarcosine such as coconut oil fatty acid sarcosine triethanolamine and sodium myristoylmethylaminoacetate and salts thereof;

As the amino acid-based surfactant, an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available amino acid-based surfactants include, for example, trade names of Amylite (registered trademark) GCK-11 (potassium N-coconut oil fatty acid acylglycine) and Amylite (registered trademark) GCK-12K (N-coconut oil Potassium fatty acid acylglycinate), Amylite (registered trademark) GCS-12K (sodium N-coconut acylglycinate), Amylite (registered trademark) GCS-11 (sodium N-coconut acylglycinate), Amisoft (registered trademark) CS -11 (N-myristoyl-L-sodium glutamate), Amisoft (registered trademark) CS-22 (N-coconut fatty acid acyl-L-glutamate sodium), Amisoft (registered trademark) LS-11 (N-lauroyl-L- sodium glutamate), Amisoft® MS-11 (N-myristoyl-L-sodium glutamate), Amisoft® HS-11P (N-stearoyl-L-sodium glutamate), Amisoft® HS-11P (F) (N-stearoyl-L-glutamate sodium), Amisoft (registered trademark) HS21 (N-stearoyl-L-glutamate disodium), Amilite (registered trademark) ACS-12 (cocoyl alanine sodium) (above, Ajinomoto Healthy Supply Co., Ltd.), Amino Surfact (registered trademark) AMMS-P1 (N-myristoyl-L-glutamate sodium, Asahi Kasei Chemicals Corp.), NIKKOL Sarcosinate MN (myristoylmethylaminoacetate sodium), NIKKOL Alaninate LN-30 ( Sodium lauroylmethyl-β-alanine) (manufactured by Nikko Chemicals Co., Ltd.), Alanone ACE (coconut fatty acid methylalanine sodium), Alanone AME (myristoylmethyl-β-alanine sodium), Alanone ALE (lauroylmethyl-β-alanine) sodium) (manufactured by Kawaken Fine Chemicals Co., Ltd.), Enagicol L-30AN (Lauroylmethyl-β-alanine sodium, Lion Specialty Chemicals Co., Ltd.), Softilt AT-L (Lauroylmethyl-β-alanine sodium, Japan manufactured by Yu Co., Ltd.).

The content of the anionic surfactant of component (A) is not particularly limited and can be appropriately selected according to the purpose. , preferably 3% by mass to 14% by mass, more preferably 5% by mass to 12% by mass, based on the total amount of the skin cleanser composition. When the content of component (A) is 3% by mass or more, the foam quality, feeling after washing, and bactericidal activity against E. coli are good, and when it is 14% by mass or less, stability, particularly low temperature stability, is obtained. Good properties.

<(B) At least one plant extract selected from extracts of bamboo shoots and water extracts of mint>
The plant extract as the component (B) is at least one selected from extracts of Sasa chinensis and water extract oil of mint, and is mainly contained in order to improve bactericidal activity against Escherichia coli.

- Sasa extract -
Sasa kurilensis used as a raw material for the Sasa kurilensis extract is a monocotyledonous plant belonging to the genus Sasa , Bambusoidea , Poaceae . It is widely grown or cultivated in Japan and is easily available.

The bamboo grass used as the raw material for extraction may be a variety of bamboo grass.
Variants of the above-mentioned Chishimazasa are not particularly limited as long as the effect of the present invention is exhibited, and can be appropriately selected according to the purpose. Examples include konshimachishima, chabomakiba, chaboshimofurichishima, nochizaekifunemagari, makibanemagari, miirochishima, variant ezonemagari, and nagabanemagaridake. These may be used individually by 1 type, and may use 2 or more types together.
In the present specification, Sasa serrata and its variants are collectively referred to as ``Sasa family''. Moreover, the extract of the above-mentioned Sasa spp.
There is no particular limitation on the method of obtaining the above-mentioned Sasa spp., it can be appropriately selected according to the purpose, and it may be collected from the natural world or commercially available.

The Sasa extract can be easily obtained by a method generally used for extracting plants, but it is extracted by an extraction method such as a steam distillation method or a compression extraction method in terms of bactericidal activity against Escherichia coli and liquid appearance. is preferred, and a purified product of the extract is more preferred. These extraction methods may be performed singly or in combination of two or more.

The use part of the Sasa spp. used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. above-ground parts such as branches and leaves; underground parts such as roots and rhizomes. These may be used individually by 1 type, and may use 2 or more types together. Among these, the above-ground part is preferable as the part to be used of the above-mentioned Sasa.

The size of the bamboo grass used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. ) and the like.

The state of the bamboo grass used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose.

The method for drying the bamboo grass used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. and a method of drying using

The method for pulverizing the bamboo grass used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. Examples include a method of pulverizing with a pulverizer or the like.

In the case of preparing the extract of S. phlox by steam distillation, the water used as the extraction solvent is not particularly limited and can be appropriately selected according to the purpose. Water, mineral water, hot spring water, spring water, fresh water, purified water, hot water, ion-exchanged water, physiological saline, phosphate buffer, phosphate buffered physiological saline and the like. These may be used individually by 1 type, and may use 2 or more types together.

The amount of the extraction solvent used is not particularly limited, and can be appropriately selected according to the purpose.

The extraction conditions (atmospheric conditions such as extraction time, extraction temperature, pressure, etc.) for the extract of S. magnolia are not particularly limited, and can be appropriately selected from known methods according to the purpose.
The compression extraction method is preferably carried out at a low temperature and a high pressure. Generally, the extraction temperature is 70° C. or less and the pressure is reduced from 100 mmHg to 700 mmHg.

The state of the Sasa serrata extract is not particularly limited, and can be appropriately selected according to the purpose. It may be a concentrate of the extract, a diluted product of the extract, a dried product of the extract of the bamboo grass, or the like. In addition, the extract of Sasa serrata may be obtained by mixing or dissolving the dried Sasa extract again in water.

Among these, as the extract of Sasa serrata, it is preferable to use Sasa serrata water obtained by extracting and purifying Sasa serrata by low-temperature and high-pressure extraction.
Commercially available products of such Sasa extract include, for example, Aqua Aroma Kumazasa (manufactured by Arista Health and Nutrition Science Co., Ltd.) and Sasa Sasa Water K2-C (manufactured by Nihon Haruma Co., Ltd.).

The content of the extract of Sasa chinensis is not particularly limited and can be appropriately selected according to the purpose. % to 1.5% by mass, more preferably 0.5% to 1.2% by mass. When the content of the Sasa extract is 0.5% by mass or more or 1.5% by mass or less, the bactericidal activity against Escherichia coli is good.

- Mint water extract -
The mint used as a raw material for the aqueous mint extract is a plant belonging to the genus Mentha in the family Lamiaceae , and most of the species are perennials, but some species are annuals. It is widely grown or cultivated in Japan and is easily available.

The plant belonging to the genus Mentha is not particularly limited and can be appropriately selected depending on the intended purpose. mentioned. These may be used individually by 1 type, and may use 2 or more types together. Among these, Japanese mint and yellow mint are preferable.
The method for obtaining the plant belonging to the Mentha genus is not particularly limited, and can be appropriately selected depending on the intended purpose.

The water extract of mint can be easily obtained by a method commonly used for extracting plants, but an extract extracted and purified by a steam distillation method is preferable in terms of bactericidal activity against Escherichia coli and liquid appearance. .

The used part of the plant belonging to the genus Mentha used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. Aerial parts such as leaves, branches, branches and leaves; and underground parts such as roots and rhizomes. These may be used individually by 1 type, and may use 2 or more types together. Among these, the above-ground part is preferable as the used part of the plant belonging to the genus Mentha.

The size of the plant belonging to the genus Mentha used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include a size in which fine powder is formed.

The state of the plant belonging to the genus Mentha used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. The state of the juice etc. are mentioned.

The method for drying the plant belonging to the genus Mentha used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. and a method of drying using a drier.

The method for pulverizing the plant belonging to the genus Mentha used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. , a method of pulverizing with an impact pulverizer or the like.

The method for squeezing the plant belonging to the genus Mentha used as the raw material for extraction is not particularly limited and can be appropriately selected according to the purpose. Examples include pressing.

The water used as an extraction solvent for the mint water extract is not particularly limited and can be appropriately selected according to the purpose. Spring water, fresh water, purified water, hot water, ion-exchanged water, physiological saline, phosphate buffer, phosphate buffered physiological saline, and the like. These may be used individually by 1 type, and may use 2 or more types together.

The amount of the extraction solvent used is not particularly limited, and can be appropriately selected according to the purpose.

The extraction conditions (atmospheric conditions such as extraction time, extraction temperature, pressure, etc.) for the water extract of mint are not particularly limited, and can be appropriately selected from known methods according to the purpose.

The state of the mint water extract is not particularly limited and can be appropriately selected according to the purpose. It may be a purified product or a purified product, a concentrate of the mint aqueous extract, a diluted mint aqueous extract, a dried mint aqueous extract, or the like. The mint water extract may be obtained by remixing or dissolving the dried mint water extract in water.

Among these, the water extract of mint is preferably mint oil obtained by extracting and refining a plant belonging to the genus Mentha by steam distillation.
Commercially available products of such a water extract of mint include, for example, mint oil (manufactured by Suzuki Mint Co., Ltd.) and peppermint white oil (manufactured by Nagaoka Jitsugyo Co., Ltd.).

The content of the mint water extract is not particularly limited and can be appropriately selected according to the intended purpose. 0.1% by mass to 0.6% by mass is preferable, and 0.2% by mass to 0.5% by mass is more preferable. When the content of the mint aqueous extract is 0.1% by mass or more, the bactericidal activity against Escherichia coli is good, and when it is 0.6% by mass or less, a specific odor can be suppressed. .

<(C) At least one polyhydric alcohol selected from glycerin, 1,3-butylene glycol, and propylene glycol>
The polyhydric alcohol as the component (C) is mainly contained to improve the foam quality and feel after cleansing.

The polyhydric alcohol of component (C) is at least one selected from glycerin, 1,3-butylene glycol, and propylene glycol.

As for the polyhydric alcohol of component (C), an appropriately synthesized one may be used, or a commercially available product may be used.
Commercially available products of glycerin as the polyhydric alcohol of component (C) include, for example, ELOGLYN R995 (glycerin) (manufactured by LG Household & Health Care), concentrated glycerin for cosmetics (manufactured by Miyoshi Oil Co., Ltd.), Triol VE (manufactured by KOKYU ALCOHOL KOGYO Co., Ltd.) and the like.

Commercially available products of 1,3-butylene glycol as the polyhydric alcohol of component (C) include, for example, High Sugar Cane BG (manufactured by Kokyu Alcohol Kogyo Co., Ltd.) under the trade name.

Commercial products of propylene glycol as the polyhydric alcohol of component (C) include, for example, cosmetic propylene glycol (manufactured by ADEKA) and Propylene Glycol JSQI (manufactured by Dow Chemical).

The content of the polyhydric alcohol of component (C) is not particularly limited and can be appropriately selected according to the purpose. 3% by mass to 12% by mass, more preferably 5% by mass to 10% by mass. When the content of component (C) is 3% by mass or more, the foam quality and feel after washing are good, and when it is 12% by mass or less, the foam quality and feel after washing are good.

<Mass ratio [(C)/(B)]>
The mass ratio [(C)/(B)] of the content (% by mass) of the component (C) to the content (% by mass) of the component (B) has a high bactericidal activity against Escherichia coli and Staphylococcus epidermidis It is 3 to 30, preferably 5 to 25, because of its low bactericidal activity against (indigenous skin bacteria). When the mass ratio [(C)/(B)] is less than 3 or more than 30, the bactericidal activity against E. coli is lowered.

<(D) amphoteric surfactant>
The amphoteric surfactant as component (D) is mainly contained to improve foam quality.

The amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. Hydroxysulfobetaine type amphoteric surfactants, amidosulfobetaine type amphoteric surfactants, phosphobetaine type amphoteric surfactants, imidazoline type amphoteric surfactants, amine oxide type amphoteric surfactants and the like. These may be used individually by 1 type, and may use 2 or more types together.

The alkylbetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include betaine lauryldimethylaminoacetate and laurylbetaine. These may be used individually by 1 type, and may use 2 or more types together.

The amidobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. betaine (coconut oil fatty acid amidopropyl betaine) and the like. These may be used individually by 1 type, and may use 2 or more types together.

The sulfobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include coconut oil fatty acid dimethylsulfopropylbetaine. These may be used individually by 1 type, and may use 2 or more types together.

The hydroxysulfobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include lauryl hydroxysultaine. These may be used individually by 1 type, and may use 2 or more types together.

The amidosulfobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include cocamidopropyl hydroxysultaine and lauramidopropyl hydroxysultaine. These may be used individually by 1 type, and may use 2 or more types together.

The phosphobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the purpose. Examples include lauryl hydroxyphosphobetaine. These may be used individually by 1 type, and may use 2 or more types together.

The imidazoline type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. and N-hydroxyethylimidazolinium betaine. These may be used individually by 1 type, and may use 2 or more types together.

The amine oxide type amphoteric surfactant is not particularly limited and can be appropriately selected according to the purpose. Examples thereof include lauryl dimethylamine oxide and coconut oil alkyldimethylamine oxide. These may be used individually by 1 type, and may use 2 or more types together.

The amphoteric surfactant of component (D) may be appropriately synthesized or commercially available.
Examples of commercially available amphoteric surfactants of component (D) include NIKKOL AM-3130N (cocamidopropyl betaine, manufactured by Nikko Chemicals Co., Ltd.), TEGO Betain (cocamidopropyl betaine, manufactured by Evonik), and the like. ), Amphitol 20AB (lauryl amide propyl betaine, manufactured by Kao Corporation), MITAINE L (lauryl betaine, manufactured by Miwon Commercial), Ampholex LSB (lauryl hydroxysultaine, Miyoshi Oil Co., Ltd.), Amphithol 20HD (lauryl hydroxysultaine Tyne, manufactured by Kao Corporation), Softazoline LSB (lauramidopropyl hydroxysultaine, Kawaken Fine Chemicals Co., Ltd.), Softazoline CH (2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, Kawaken Fine Chemicals Co., Ltd.) company), Amphitol 20N (lauryl dimethylamine oxide, manufactured by Kao Corporation), Unisafe (registered trademark) A-LM (lauryl dimethylamine oxide, manufactured by NOF Corporation), and the like.

The content of the amphoteric surfactant as component (D) is not particularly limited and can be appropriately selected according to the purpose. It is preferably 0.1% by mass to 5% by mass, more preferably 0.5% by mass to 4% by mass, based on the total amount of the agent composition. When the content of the component (D) is 0.1% by mass or more, the foam quality is good, and when it is 5% by mass or less, the hand skin is not irritated.

<Other ingredients>
In the skin cleanser composition of the present invention, in addition to the components (A), (B), (C), and (D), the following components are included within the scope of the present invention: Ingredients commonly used in skin cleansing compositions and the like can be blended as other ingredients, if desired.

The other components are not particularly limited and can be appropriately selected depending on the intended purpose. Examples include silicones, moisturizing agents, anionic surfactants other than the component (A) sodium ether sulfate, etc.), nonionic surfactants (e.g., polyoxyethylene alkyl ethers, etc.), cationic surfactants (e.g., stearyltrimethylammonium chloride, etc.), anti-inflammatory agents (e.g., dipotassium glycyrrhizinate, glycyrrhetinic acid, allantoin, etc.), vitamins, cationic polymers (e.g., cationized cellulose, cationized guar gum, polydimethyldimethylethylenepyrrolidinium chloride (polyquaternium-6), dimethyldiallylammonium chloride/acrylamide copolymer, etc.), amphoteric polymers ( acrylic acid/dimethyldiallylammonium copolymer, etc.), anionic polymers (e.g., acrylic acid-based polymers, etc.), animal extracts or derivatives thereof, plant extracts other than the component (B) or derivatives thereof, pearlization agents, coloring agents, scrubbing agents (e.g. polyethylene, etc.), fragrances, dyes, pigments, preservatives other than the component (B) (e.g., methylparaben, phenoxyethanol, etc.), sugars, oils, lanolin derivatives, protein derivatives, acrylic resins Dispersion liquid, antioxidant, sequestering agent, ultraviolet absorber, wetting agent (e.g., sorbitol, etc.), emulsifier (e.g., steareth-11, trideceth-8, octyldodeceth-5, etc.), chelating agent (e.g., EDTA-4Na etc.), pH adjusters (eg, potassium hydroxide, monoethanolamine, etc.), solvents (eg, water, etc.), and the like.

-pH-
The pH of the skin cleanser composition at 25° C. is not particularly limited and can be appropriately selected depending on the intended purpose. preferable.
The pH can be measured, for example, using a pH meter (HM-30V manufactured by Toa DKK Co., Ltd.).

-container-
The skin cleanser composition of the present invention is not particularly limited, and is used by being filled in a normal container.
The container is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include a pump dispenser container, a tube container, a foamer container, a squeeze container, and a bag-like container. Among these, a former container is preferable.

The foamer container is not particularly limited and can be appropriately selected from known foamer containers. Examples thereof include a non-gas type foam discharge container, an aerosol container using a propellant and a pressure container, and the like. Among these, a non-gas foam discharge container is preferable.

The non-gas type foam discharge container is not particularly limited as long as it can mix the skin cleanser composition with air and discharge it in a foamed state, and can be appropriately selected according to the purpose. A squeeze foamer container capable of discharging foam by squeezing the body of the bottle by hand, and a pump foaming container capable of discharging foam by pushing down the nozzle portion may be used. As such a former container, those manufactured by Yamato Seikan Co., Ltd., Yoshino Kogyosho Co., Ltd., or the like can be used. More specifically, as the former container, the former containers described in JP-A-7-315463, JP-A-8-230961, and JP-A-2005-193972 can be used.

The non-gas type foam dispenser usually has a foam forming member for forming foam.
A specific example of the non-gas type foam discharge container has a porous membrane (preferably made of a plastic material such as nylon, polyester, or polyolefin), and the skin cleanser composition is applied to the porous membrane. Examples include those that form bubbles upon passage.

The mesh of the porous membrane is not particularly limited and can be appropriately selected depending on the purpose. .
The number of the porous membranes is not particularly limited and can be appropriately selected depending on the purpose, but from the viewpoint of improving foam performance, 2 to 4 are preferable.

-Properties-
The properties of the skin cleanser composition are not particularly limited and can be appropriately selected depending on the intended purpose, but liquid form at room temperature is preferable.
The viscosity of the skin cleanser composition at 25° C. is not particularly limited and can be appropriately selected depending on the intended purpose. preferable. Foam quality is favorable in the said viscosity being 1 mPa*s or more or 30 mPa*s or less.
Also, when using a foamer container, for example, when using a pump foamer container that can discharge foam by pushing down the nozzle part and two 200-mesh porous membranes, the skin is washed under the temperature conditions used. The viscosity of the agent composition is preferably 15 mPa·s or less, more preferably 1 mPa·s to 10 mPa·s.
Here, the viscosity is determined, for example, by using a Brookfield viscometer, setting the temperature of the skin cleanser composition to 25° C., rotating at 60 rotations/minute, No. It can be measured by measuring the viscosity after 1 minute with No. 1 rotor.

-Production method-
The method for producing the skin cleanser composition of the present invention is not particularly limited and can be appropriately selected according to the purpose. It can be obtained by mixing the component (D), optionally the other components, and the purified water (blended as the remaining amount so that the entire skin cleanser composition is 100% by mass). . When mixing, you may heat as needed.

The skin cleanser composition may be prepared using an apparatus. The device is not particularly limited and can be appropriately selected depending on the intended purpose.
The stirring blade is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include propellers, turbines, and dispersers.

-Applications-
The application site of the skin cleanser composition is not particularly limited and can be appropriately selected according to the intended purpose.
The method of using the skin cleanser composition is not particularly limited and can be appropriately selected according to the intended purpose.

The skin cleanser composition retains the indigenous bacteria that enhance the barrier function on the skin, has high bactericidal activity against pathogenic E. coli and the like, and has a good liquid appearance without coloration. It has no unpleasant odor, excellent foam quality, feel after washing, no irritation to hands and skin, and excellent stability. It can be used for makeup removal and the like, and can be particularly suitably used for liquid hand soap that is discharged in foam form.

The present invention will be specifically described below with reference to Examples, Comparative Examples, and Formulation Examples, but the present invention is not limited to these Examples and Formulation Examples.

The content of each component described in Examples, Comparative Examples, and Formulation Examples is shown in mass%, and all values are converted to pure content. In addition, the mass ratio [(C)/(B)] of the content (% by mass) of component (C) to the content (% by mass) of component (B) is rounded to the second decimal place, We asked for the first place and listed it.

(Examples 1 to 32 and Comparative Examples 1 to 12)
<Preparation of skin cleanser composition>
At 70 ° C. to 80 ° C., the components (A), (C), and (D) having the compositions and contents (% by mass) shown in Tables 1 to 6 below, purified water, and common components were uniformly mixed. was dissolved in Thereafter, after cooling to 40° C. or less, the component (B) or a comparative component of the component (B) was added and stirred until uniform to obtain a solution. Next, while stirring the solution, potassium hydroxide was appropriately added to adjust the pH to a predetermined value. After that, purified water was added so that the total amount of each solution was 100% by mass, and skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 were obtained.
In addition, as shown in Table 9 below, the component (B) "mint oil" is an extract obtained by a steam distillation extraction method, and the component (B) "Chishima Sasa water" is an extract obtained by a compression extraction method. The comparative component of component (B) is a solvent extract using butylene glycol or ethanol as an extraction solvent.

For each of the skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12, "bactericidal activity against Escherichia coli", "liquid appearance", "odor", "foam quality" (elasticity of foam) was determined as follows. , creaminess of foam, and persistence of foam), “feel after washing” (refreshing feeling after rinsing and moist feeling after rinsing), “non-irritation to hand skin”, and “stability” ( Low temperature stability, high temperature stability, and pH) were evaluated and determined. In addition, each of the skin cleanser compositions of Examples 1 to 32 was further evaluated and determined for "bactericidal activity against Staphylococcus epidermidis" as follows. The results are shown in Tables 1 to 6 below.

<Bactericidal power against E. coli>
(1) Preparation of bacterial solution A representative Escherichia coli that causes infectious diseases ( Escherichia coli NBRC3972: Gram-negative bacteria, obtained from the National Institute of Technology and Evaluation) was prepared using SCDLP medium (manufactured by Nihon Pharmaceutical Co., Ltd.). Static culture was carried out at 30° C. for 24 hours under aerobic conditions. Next, the Escherichia coli was suspended in physiological saline (manufactured by Otsuka Pharmaceutical Co., Ltd.), and the number of initial bacteria was adjusted to 10 ⁶ cells/mL to prepare a bacterial solution.

(2) Preparation of Test Solution Each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 was diluted 10-fold with sterilized water to prepare each test solution.

(3) Evaluation method At 25 ° C., 0.1 mL of the bacterial solution obtained in (1) was added to 10 mL of each test solution obtained in (2) above, and the mixture was sufficiently stirred. 30 seconds after the addition, 0.3 mL of the mixed solution was taken out and added to 2.7 mL of SCDLP agar medium (Soybean-Casein Digest Broth with Lectin & Polysorbate 80, manufactured by Wako Pure Chemical Industries, Ltd.) to obtain a 10-fold diluted solution. . A similar method was repeated to obtain 10 ² -fold, 10 ³ -fold, and 10 ⁴ -fold dilutions of the bacterial solution. 1.0 mL of each diluted solution was collected in a petri dish, homogenized by adding 15 mL of SCDLP agar medium, cultured at 30 ° C. for 1 day, and the number of surviving bacteria was measured by counting the number of colonies (agar plate dilution method ). The difference (Δlog ₁₀ ) between the number of initial bacteria and the number of surviving bacteria was calculated by the following formula (1), and the "bactericidal activity against Escherichia coli" was determined based on the criteria below. In addition, it represents that the larger the numerical value calculated by the following formula (1), the higher the bactericidal activity.
Sterilization number Δlog ₁₀ = -log ₁₀ (number of surviving bacteria/number of initial bacteria) Formula (1)
－Judgment criteria for “Bactericidal activity against Escherichia coli”－
◎: Δlog ₁₀ is 2.7 or more ○: Δlog ₁₀ is 2.5 or more and less than 2.7 △: Δlog ₁₀ is 2.0 or more and less than 2.5 ×: Δlog ₁₀ is less than 2.0

<Liquid Appearance>
50 g of each of the skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 12 immediately after preparation was filled into a hard glass vial bottle, and the appearance of the liquid was visually observed by a panel of experts. "Liquid appearance" was determined based on the results.
- Judgment criteria for "liquid appearance" -
◎: The liquid color is transparent ○: The liquid color is slightly yellow △: The liquid color is yellow ×: The liquid color is brown

<Smell>
50 g of each of the skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 immediately after preparation was filled into a hard glass vial bottle, and three expert panels evaluated the "smell" based on the following criteria. The results were evaluated based on the following evaluation criteria by calculating the average score of 3 expert panelists.
－Evaluation Criteria for “Smell”－
5: No specific odor at all 4: Slight specific odor 3: Slightly specific odor 2: Significant specific odor but no offensive odor 1: Strong specific odor Feeling unpleasant odor - Criteria for "smell" -
◎: Average score of 4.0 or more ○: Average score of 3.0 or more and less than 4.0 △: Average score of 2.0 or more and less than 3.0 ×: Average score of 2 Less than 0 points

<Foam Quality>
Each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 was filled in a foamer container (manufactured by Yoshino Kogyosho Co., Ltd.). Three expert panels evaluated (1) "elasticity of foam", (2) "creaminess of foam" of each of the skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 filled in the container. And (3) "foam persistence" was evaluated by the following method, the average score of the three expert panels was calculated for each item, and the total score of the average score of the three items was calculated, and the following judgment criteria were obtained. "Foam quality" was determined based on.
- Judgment criteria for "foam quality" -
◎: The total score of the average evaluation points of (1) to (3) is 12.0 points or more, and the average evaluation score of all items (1) to (3) is 4 points or more ○: (1) to (3) ) has a total score of 9.0 or more and less than 12.0 points, and the average score of all items (1) to (3) is 3 points or more △: Average of (1) to (3) The total evaluation score is 6.0 or more and less than 9.0 points, and the average evaluation score of all items (1) to (3) is 2 points or more ×: Average evaluation of (1) to (3) The total score is less than 6.0 points

(1) Elasticity of Foam Three expert panelists moistened both hands with water, waved them once to lightly dry the water, and applied each of the skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 to the palm of the right hand. 1 g (1 push) of the product was discharged from the former container under the condition of 25°C. The palms of both hands were rubbed together and reciprocated, and after reciprocating both hands 10 times, the left hand was pressed against the foam collected in the right palm, and the "elasticity of the foam" was evaluated based on the following evaluation criteria.
-Evaluation Criteria for “Foam Elasticity”-
5 points: The foam is very elastic 4 points: The foam is elastic 3 points: The foam is somewhat elastic 2 points: The foam is slightly elastic 1 point: The foam is almost non-elastic

(2) Creaminess of foam Three expert panelists moistened both hands with water, waved them once to lightly dry the water, and applied each of the skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 to the palm of the right hand. 1 g (1 push) of the product was discharged from the former container under the condition of 25°C. The palms of both hands were rubbed together and reciprocated, and the appearance of the foam was visually observed when both hands were reciprocated 10 times. evaluated based on
-Evaluation Criteria for “Creamyness of Foam”-
5 points: Most of the bubbles were fine bubbles and were very creamy 4 points: Large bubbles were mixed in some of the fine bubbles, but they were creamy 3 points: Among the fine bubbles About half of the large bubbles were mixed, and it was slightly creamy. 2 points: There were more large and coarse bubbles than fine bubbles, and it was not creamy. 1 point: Only large and coarse bubbles were formed, and it was not creamy at all.

(3) Sustainability of foam Three expert panelists moistened both hands with water, waved them once to lightly dry the water, and applied each of the skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 to the palm of the right hand. 1 g (1 push) of the product was discharged from the former container under the condition of 25°C. The palms of both hands were put together and the palms were rubbed in a reciprocating motion. The volume of foam (Fa) immediately after rubbing both hands back and forth 10 times and the volume of foam (Fb) after standing for 10 seconds after rubbing were visually observed, and the "sustainability of foam" was evaluated according to the following evaluation criteria. evaluated based on
-Evaluation Criteria for “Creamyness of Foam”-
5 points: no change at all between foam volume (Fa) and foam volume (Fb) 4 points: almost no change between foam volume (Fa) and foam volume (Fb) 3 points: foam compared to foam volume (Fa) 2 points: The foam volume (Fb) is much smaller than the foam volume (Fa). 1 point: Both the foam volume (Fa) and the foam volume (Fb) are does not remain

<Feeling after washing>
Each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 was filled in a foamer container (manufactured by Yoshino Kogyosho Co., Ltd.). Three expert panels evaluated (1) "refreshing feeling after rinsing" and (2) "moist feeling after rinsing" of each of the skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12 filled in the container. ”Evaluated by the following method, calculated the average score of the three specialized panels for each item, calculated the total score of the average scores of (1) and (2), and calculated the total score of the average scores of (1) and (2), Afterward feeling" was judged.
- Criteria for “feel after washing” -
◎: The total score of the average evaluation points of (1) and (2) is 8.0 points or more ○: The total score of the average evaluation points of (1) and (2) is 7.0 points or more and less than 8.0 points △ : The total score of the average evaluation points of (1) and (2) is 5.0 points or more and less than 7.0 points × : The total score of the average evaluation points of (1) and (2) is less than 5.0 points

(1) Refreshing feeling after rinsing Three expert panelists moistened both hands with water, waved them once to lightly dry them, and applied each of the skin cleansers of Examples 1 to 32 and Comparative Examples 1 to 12 to the palm of the right hand. 1 g (1 push) of the composition was discharged from a former container at 25°C. Rub the palms of both hands in a reciprocating motion, rub the palms together for 10 seconds, then rinse both hands with tap water (25 ° C, 2 L / min). "Refreshing feeling after rinsing" was evaluated based on the following evaluation criteria.
-Evaluation criteria for “refreshing feeling after rinsing”-
5 points: Very refreshing feeling 4 points: Refreshing feeling 3 points: Slightly refreshing feeling 2 points: Slightly not refreshing feeling 1 point: No refreshing feeling at all

(2) Moist feeling after rinsing Three expert panelists moistened both hands with water, waved them once to lightly dry the water, and applied each of the skin cleansers of Examples 1 to 32 and Comparative Examples 1 to 12 to the palm of the right hand. 1 g (1 push) of the composition was discharged from a former container at 25°C. Rub the palms of both hands in a reciprocating motion, rub the palms together for 10 seconds, then rinse both hands with tap water (25 ° C, 2 L / min). "Moist feeling after rinsing" was evaluated based on the following evaluation criteria.
-Evaluation criteria for “moist feeling after rinsing”-
5 points: very moist feeling 4 points: moist feeling 3 points: slightly moist feeling 2 points: slightly not moist feeling 1 point: no moist feeling at all

<Lack of stimulation to hand skin>
Each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 was filled in a foamer container (manufactured by Yoshino Kogyosho Co., Ltd.).
Three expert panelists wet both hands with water and shake them once to lightly dry them. It was discharged from the former container under the condition of 25°C. Rub the palms of both hands in a reciprocating motion, rub the palms together for 10 seconds, rinse both hands with tap water (25 ° C, 2 L / min), dry with a towel, ” was evaluated based on the following evaluation criteria. The results were evaluated based on the following evaluation criteria by calculating the average score of 3 expert panelists.
-Evaluation Criteria for “Lack of Irritation to Hand Skin”-
5: No skin irritation during washing and drying 4: Little irritation during washing and drying 3: Slight irritation during washing and drying 2 : Irritation to hand skin during washing or drying 1 : Strong irritation to hand skin during washing or drying - Criteria for “no irritation to hand skin” -
◎: Average score is 4.0 or more ○: Average score is 3.0 or more and less than 4.0 △: Average score is 2.0 or more and less than 3.0 ×: Average score is less than 2.0

<Stability>
(1) “low temperature stability”, (2) “high temperature stability”, and (3) “pH” of each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 were evaluated by the following methods. Then, the total score for each of the items (1) to (3) was obtained, and the “stability” was determined based on the following criteria.
- Criteria for “stability” -
◎: The total score of (1) to (3) is 12.0 points or more, and all items (1) to (3) are 3 points or more ○: The total score of (1) to (3) is 9.0 points points or more and less than 12.0 points, and all items (1) to (3) are 3 points or more △: The total points of (1) to (3) are 6.0 points or more and less than 9.0 points, and (1 ) to (3) all items are 2 points or more × : Total score of (1) to (3) is less than 6.0 points

(1) Low-temperature stability After filling 50 g of each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 into a hard glass vial bottle and storing the composition at 10°C for 1 month, or at 10°C. After being stored for 1 month under the environment of , the temperature was returned to 25° C., and then one expert panel visually observed the appearance of the liquid and evaluated the “low temperature stability” based on the following evaluation criteria.
－Evaluation Criteria for “Low Temperature Stability”－
5 points: No precipitation after storage at 10°C for 1 month 4 points: No precipitation after storage at 10°C for 1 month and then returned to 25°C 3 points: Returned to 25°C after storage at 10°C for 1 month 2 points: precipitates are observed when the temperature is returned to 25°C after storage at 10°C for 1 month. 1 point: when the temperature is returned to 25°C after storage at 10°C for 1 month. A large amount of precipitates are observed in

(2) High Temperature Stability 50 g of each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 was filled into a hard glass vial and stored in an environment of 50° C. for 1 month. One person visually observed the liquid appearance and evaluated the odor, and evaluated the "high-temperature stability" based on the following evaluation criteria.
－Evaluation Criteria for “High Temperature Stability”－
5 points: After storage at 50°C for 1 month, there is no change in color and odor compared to before storage 4 points: After storage at 50°C for 1 month, there is almost no change in color and odor compared to before storage 3 points: After storage at 50°C for 1 month, a slight change in color or odor is observed compared to before storage, but there is no problem in terms of commercial value. 2 points: Compared to before storage after storage at 50°C for 1 month A change in color or odor is observed, and there is a problem in terms of commercial value. 1 point: After storage at 50°C for one month, the color or odor changes significantly compared to before storage, and there is a problem in terms of commercial value.

(3) pH
50 g of each skin cleanser composition of Examples 1 to 32 and Comparative Examples 1 to 12 was filled in a hard glass vial bottle, stored in an environment of 50 ° C. for 1 month, and measured with a pH meter (manufactured by Toa DKK Corporation). , HM-30V), and "pH" was evaluated based on the following evaluation criteria.
-Evaluation criteria for "pH"-
5 points: pH change within ±0.2 after storage at 50°C for 1 month compared to before storage 4 points: pH change exceeds ±0.2 compared to before storage after storage at 50°C for 1 month ±0 Within .4 3 points: pH change after storage at 50°C for 1 month compared to before storage exceeds ±0.4 within ±0.6 2 points: pH change after storage at 50°C for 1 month compared to before storage is more than ±0.6 and within ±0.8 1 point: After storage at 50°C for 1 month, pH change exceeds ±0.8 compared to before storage

<Bactericidal activity against Staphylococcus epidermidis>
Since Staphylococcus epidermidis is a resident bacterium of the skin that has a barrier function, the skin cleanser composition preferably has low bactericidal activity against Staphylococcus epidermidis. Therefore, the bactericidal activity against Staphylococcus epidermidis of each of the skin cleansing compositions of Examples 1 to 32 was evaluated by the following method.

(1) Preparation of fungal solution Staphylococcus epidermidis ( Staphylococcus epidermidis ATCC12228, obtained from the National Institute of Technology and Evaluation (NBRC)) was treated with SCDLP medium (manufactured by Nihon Pharmaceutical Co., Ltd.) under aerobic conditions for 30 minutes. It was statically cultured at ℃ for 24 hours. Next, the above-mentioned Staphylococcus epidermidis was suspended in physiological saline (manufactured by Otsuka Pharmaceutical Co., Ltd.), and the number of initial bacteria was adjusted to 10 ⁶ cells/mL to prepare a bacterial solution.

(2) Preparation of Test Solution Each skin cleanser composition of Examples 1 to 32 was diluted 10-fold with sterilized water to prepare each test solution.

(3) Evaluation method At 25 ° C., 0.1 mL of the bacterial solution obtained in (1) was added to 10 mL of each test solution obtained in (2) above, and the mixture was sufficiently stirred. 30 seconds after the addition, 0.3 mL of the mixed solution was taken out and added to 2.7 mL of SCDLP agar medium (Soybean-Casein Digest Broth with Lectin & Polysorbate 80, manufactured by Wako Pure Chemical Industries, Ltd.) to obtain a 10-fold diluted solution. . A similar method was repeated to obtain 10 ² -fold, 10 ³ -fold, and 10 ⁴ -fold dilutions of the bacterial solution. 1.0 mL of each diluted solution was collected in a petri dish, homogenized by adding 15 mL of SCDLP agar medium, and cultured at 30 ° C. for 2 days, and the number of surviving bacteria was measured by counting the number of colonies (agar plate dilution method ). The difference (Δlog ₁₀ ) between the number of initial bacteria and the number of surviving bacteria was calculated by the following formula (2), and the "bactericidal activity against Staphylococcus epidermidis" was determined based on the criteria below. In addition, it represents that the larger the numerical value calculated by the following formula (2), the higher the bactericidal activity.
Sterilization number Δlog ₁₀ =-log ₁₀ (number of surviving bacteria/number of initial bacteria) Equation (2)
- Criteria for "Bactericidal activity against Staphylococcus epidermidis" -
◎: Δlog ₁₀ is less than 1.0 ○: Δlog ₁₀ is 1.0 or more and less than 2.0 △: Δlog ₁₀ is 2.0 or more and less than 3.0 ×: Δlog ₁₀ is 3.0 or more

(Prescription Examples 1-12)
<Preparation of skin cleanser composition>
In the preparation of the skin cleanser compositions of Examples 1 to 32 and Comparative Examples 1 to 12, except that the compositions and contents (mass%) shown in Tables 7 and 8 below were changed, Examples 1 to 32 and Skin cleansing compositions of Formulation Examples 1-12 were obtained in the same manner as the preparation of the skin cleansing compositions of Comparative Examples 1-12.

The details of each component used in Examples 1-32, Comparative Examples 1-12, or Formulation Examples 1-12 are shown in Table 9 below.

　※１：ラウリン酸カリウムは、ラウリン酸（Ｋｏｒｔａｃｉｄ　１２９９、Ｐａｃｉｆｉｃ　Ｏｌｅｏｃｈｅｍｉｃａｌｓ製）を水酸化カリウム（ＰＯＴＡＳＳＩＵＭ　ＨＹＤＲＯＸＩＤＥ　４８％、ＵＮＩＤ製）で中和させて調製したものを使用した。
　※２：ミリスチン酸カリウムは、ミリスチン酸（Ｋｏｒｔａｃｉｄ　１４９９、Ｐａｃｉｆｉｃ　Ｏｌｅｏｃｈｅｍｉｃａｌｓ製）を水酸化カリウム（ＰＯＴＡＳＳＩＵＭ　ＨＹＤＲＯＸＩＤＥ　４８％、ＵＮＩＤ製）で中和させて調製したものを使用した。

*1: Potassium laurate was prepared by neutralizing lauric acid (Kortacid 1299, manufactured by Pacific Oleochemicals) with potassium hydroxide (POTASSIUM HYDROXIDE 48%, manufactured by UNID).
*2: Potassium myristate was prepared by neutralizing myristic acid (Kortacid 1499, manufactured by Pacific Oleochemicals) with potassium hydroxide (POTASSIUM HYDROXIDE 48%, manufactured by UNID).

The skin cleanser composition retains the indigenous bacteria that enhance the barrier function on the skin, has high bactericidal activity against pathogenic E. coli and the like, and has a good liquid appearance without coloration. It has no unpleasant odor, excellent foam quality, feel after washing, no irritation to hands and skin, and excellent stability. It can be used for makeup removal and the like, and can be particularly suitably used for liquid hand soap that is discharged in foam form.

Claims (5)

(A) an anionic surfactant;
(B) at least one plant extract selected from extracts of Sasa squamosa and water extracts of mint;
(C) at least one polyhydric alcohol selected from glycerin, 1,3-butylene glycol, and propylene glycol;
and wherein the mass ratio [(C)/(B)] of the content of component (C) to the content of component (B) is 3-30. The skin cleanser composition according to Claim 1, wherein the extract of component (B) is Sasa serrata water, and the water extract of mint (B) is mint oil. The content of component (A) is 5% by mass to 12% by mass,
The content of the extract of component (B) is 0.5% by mass to 1.2% by mass, and the content of the water extract of component (B) is 0.2% by mass to 0.2% by mass. 5% by mass,
3. The skin cleanser composition according to claim 1, wherein component (C) is 5% by mass to 10% by mass. (D) The skin cleanser composition according to any one of claims 1 to 3, further comprising an amphoteric surfactant. The skin cleanser composition according to claim 4, wherein the content of component (D) is 0.5% by mass to 4% by mass.