JP7303032B2 - Solubilized skin cleanser composition - Google Patents

Description

The present invention relates to a solubilized skin cleanser composition.

Conventionally, solid oil components contained in difficult-to-remove make-up stains such as waterproof mascara are removed by dissolving them with an oil agent. Therefore, cleansers using oils as cleansing ingredients are marketed in various formulations such as creams, gels and liquids.
These formulations are usually prepared by appropriately combining nonionic surfactants to wash away the oil that dissolves dirt. However, formulations that simply combine an oil and a nonionic surfactant have the problem of being slimy during rinsing and leaving the oil behind after rinsing, leaving the skin feeling unrefreshing. For this reason, many consumers wash their skin with a cleanser such as a face wash after cleansing.

For example, Patent Document 1 describes that a cleansing composition containing a specific HLB nonionic surfactant, a low-viscosity oil, and a water-soluble solvent has excellent makeup cleansing power and can be washed off cleanly. . However, although this cleansing composition can be washed off without being sticky, it cannot provide the skin with a refreshing feeling of a tight skin feeling as if washed with a facial cleanser.
In addition, a cleansing composition (Patent Documents 2 and 3) in which an anionic surfactant is combined with a nonionic surfactant, an oil agent, and a polyhydric alcohol has been studied, but the role of the anionic surfactant here Although it improves the rinsability of the composition, it does not give a cleansed skin feeling to the skin after rinsing.
Furthermore, Patent Literature 4 describes a cleansing composition that combines an anionic surfactant with a silicone-based nonionic surfactant and silicone oil to impart a refreshing feeling. However, when an anionic surfactant and a nonionic surfactant coexist, the surfactant that can be selected is greatly limited in terms of long-term stability. It was not possible to obtain a composition that gives such a crisp feeling.

JP 2008-184415 A Japanese Unexamined Patent Application Publication No. 2013-1698 JP-A-9-175936 JP-A-2000-336014

Therefore, in the present invention, an oil agent is solubilized by combining a nonionic surfactant having an appropriate HLB and an appropriate amount of a fatty acid salt, so that when applied to the skin, the cleansing power possessed by the oil agent is exhibited, and waterproof mascara and the like can be used. It can dissolve stubborn makeup. In addition, after rinsing off quickly without stickiness, a cleansing agent composition that can leave a tight skin feeling due to scum formation of fatty acid salts on the skin and make the skin feel as if it has been washed with a face wash. intended to obtain.
In addition, when a nonionic surfactant is combined with a fatty acid salt, the pH becomes alkaline. Therefore, during long-term storage, the nonionic surfactant hydrolyzes to produce fatty acids, resulting in a state where the degree of neutralization as fatty acids decreases. It also solves the problem that precipitation occurs at low temperatures.

The present inventors contain a specific nonionic surfactant, a fatty acid salt, an oil, a water-soluble solvent, a specific base and water, and combine the specific nonionic surfactant and the fatty acid salt in a specific ratio. By using it, a solubilized skin cleanser composition is obtained which has excellent long-term storage stability, high detergency, can be quickly rinsed without being sticky when washed off, and gives a refreshing feeling to the skin after rinsing. I found out.

The present invention provides the following components (A), (B), (C), (D), (E) and (F):
(A) 7 to 30% by mass of nonionic surfactant with HLB 6 to 18,
(B) Fatty acid salt 0.1 to 4% by mass in terms of fatty acid content,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.

The solubilized skin cleanser composition of the present invention has a high detergency and can be rinsed off quickly without being sticky when washed off, and can give the skin after rinsing a refreshing feeling as if it was washed with a facial cleanser. It is also excellent in long-term storage stability. In addition, the sense of irritation to the eyes has also been improved.

In the present invention, solubilization refers to a thermodynamically stable liquid phase in which an oil agent and an aqueous phase component are mutually dissolved by a surfactant, and exhibits a transparent to translucent appearance.
In the solubilized skin cleansing composition of the present invention, a nonionic surfactant and an anionic surfactant are mainly used in combination to form a solubilization system. Hydrophobicity) balance changes with temperature, so the solubilized composition has a cloud point on the high temperature side and a solubilization limit point on the low temperature side. The region between this cloud point and the solubilization limit point is called the solubilization temperature region, and widening this temperature region widens the stable temperature region of the produced solubilized composition and increases the solubilization amount of the oil. It leads to things.
As a solubilized product, it is important that the appearance does not change in the actual use temperature range, and in order to withstand use in actual life, it is preferable to maintain the solubilized state in the temperature range of 0 ° C. to 40 ° C. Furthermore, it is more preferable to maintain the solubilized state in the range of -5°C to 50°C, taking storage conditions into consideration.

The component (A) nonionic surfactant used in the present invention is a nonionic surfactant having an HLB of 6-18. The component (A) nonionic surfactant, together with the component (B) fatty acid salt, plays a role in solubilizing the component (C) oil agent.
Here, HLB (hydrophilic-lipophilic balance) is calculated by Griffin's formula (J, Soc, Cosmet, Chem., 1,311(1949); 5,249(1953)).

The nonionic surfactant of component (A) needs to be adjusted to HLB suitable for solubilization in the presence of component (B), and from the viewpoint of widening the solubilization temperature range, HLB is preferably 7 to 12.5. , more preferably HLB 8 to 12.3, more preferably HLB 9 to 12.0.
Further, fatty acid esters are preferred from the viewpoint of being gentler to the skin, such as glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters and polyoxyethylene sorbitol. It is preferably at least one selected from fatty acid esters.
The component (A) nonionic surfactant can be used alone or in combination of two or more. When two or more nonionic surfactants are combined, the HLB should be used within the above range.
The HLB when two or more nonionic surfactants are mixed is obtained by averaging the HLB values of each nonionic surfactant based on the mixing ratio, and is determined as follows. Let HLB at the time of mixing of 2 or more types of nonionic surfactants be the range of said HLB.

HLB at the time of mixing=Σ(HLBx×Wx)/ΣWx
HLBx indicates the HLB value of nonionic surfactant X.
Wx indicates the mass (g) of the nonionic surfactant X having the value of HLBx.

In addition, the nonionic surfactant of component (A) is preferably a mixture of two or more nonionic surfactants with different HLB from the viewpoint of increasing the solubilization amount of the oil agent and widening the solubilization temperature range. , (a1) a nonionic surfactant with an HLB of 6 to 8, (a2) a nonionic surfactant with an HLB of 13 or more and 18 or less, and (a3) a nonionic having an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups. (a1) a nonionic surfactant with an HLB of 6 to 8 and (a2) a nonionic surfactant with an HLB greater than 13 and 18 or less. and (a3) a nonionic surfactant having an HLB greater than 8 and 13 or less having a branched alkyl group or two or more alkyl groups, selected from component (a1) It is more preferable to contain one or more kinds, one or more kinds selected from component (a2) and one or more kinds selected from component (a3).

(a1) Examples of nonionic surfactants with HLB of 6 to 8 include polyglycerol fatty acid esters such as diglyceryl oleate and diglyceryl isostearate; polyglycerols such as diglycerin 2-ethylhexyl ether and isostearyl glyceryl ether; Alkyl ethers; polyethylene glycol fatty acid esters such as polyethylene glycol (5) monostearate ester;
Among these, from the viewpoint of further expanding the solubilization temperature range, it is preferable to include one or more selected from diglyceryl isostearate, diglyceryl oleate and isostearyl glyceryl ether, diglyceryl isostearate and oleic acid. It more preferably contains one or two selected from diglyceryls, and more preferably contains diglyceryl isostearate.

(a2) Examples of nonionic surfactants with HLB greater than 13 and 18 or less include polyoxyethylene fatty acid esters such as polyoxyethylene (12) monolaurate, polyoxyethylene (20) polyoxyethylene (20) sorbitan monostearate and the like. Polyoxyethylene-based surfactants such as oxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester such as polyoxyethylene (20) glycerin monostearate; sucrose fatty acid ester such as sucrose stearate; decyl glucoside, etc. and alkyl polyglucosides of
Among these, 1 selected from polyoxyethylene fatty acid esters having alkyl groups of 8 to 18 carbon atoms, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters and alkyl glucosides from the viewpoint of further expanding the solubilization temperature range It preferably contains one or more species, and more preferably contains one or more selected from polyoxyethylene fatty acid esters and alkyl glucosides, and is selected from polyoxyethylene (12) monolaurate and decyl glucoside. More preferably, one or two are included.

(a3) Branched alkyl group or nonionic surfactant having HLB greater than 8 and 13 or less having two or more alkyl groups, the branched alkyl group preferably has 8 to 18 carbon atoms, for example, octyldodecyl group, hexyl A decyl group, an isostearyl group, and the like can be mentioned. Moreover, as the alkyl group, those having 8 to 18 carbon atoms are preferable.

Specifically, polyoxyethylene fatty acid esters such as polyoxyethylene (12) monoisostearate, polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene (20) sorbitan trioleate, polyoxyethylene tetraoleate (30) Polyoxyethylene sorbitol fatty acid esters such as sorbitol, polyoxyethylene alkyl ethers such as polyoxyethylene (20) octyldodecyl ether, polyoxyethylene hydrogenated castor oil derivatives such as polyoxyethylene (60) hydrogenated castor oil monoisolaurate, polyoxyethylene glycerin fatty acid esters such as polyoxyethylene (8) glyceryl monoisostearate;
Among these, it is preferable to contain one or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters. , polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters and polyoxyethylene glycerin fatty acid esters. It further contains one or more selected from isostearates, polyoxyethylene (30) sorbitol tetraoleate, polyoxyethylene (20) sorbitan trioleate and polyoxyethylene (8) glyceryl monoisostearate. preferable.

When the component (A) contains one or more selected from the components (a1) and (a2) and the component (a3), from the viewpoint of widening the solubilization temperature range, the component for the component (a3) The total content ratio of (a1) and component (a2) [((a1) + (a2)) / (a3)] is preferably 3.0 or more, more preferably 4.5 or more, and 5.0 or more It is more preferably 10 or less, more preferably 9 or less, and even more preferably 8 or less.
Further, when the component (A) contains the component (a1) and the component (a2), from the viewpoint of expanding the solubilization temperature range, the content ratio of the component (a1) to the component (a2) [(a1)/(a2) ] is preferably 0.4 or more, more preferably 0.6 or more, still more preferably 0.8 or more, preferably 8 or less, more preferably 2.4 or less, and even more preferably 1.6 or less.

The content of component (A) in the solubilized skin cleansing composition is 7% by mass or more and 10% by mass in the total composition from the viewpoint of widening the solubilization temperature range while maintaining the solubility of the oily mascara. % or more is preferable, 12% by mass or more is more preferable, 14% by mass or more is more preferable, 30% by mass or less is preferable, 25% by mass or less is preferable, 20% by mass or less is more preferable, and 18% by mass or less is even more preferable. . The content of component (A) is 7 to 30% by mass, preferably 10 to 25% by mass, more preferably 12 to 20% by mass, and even more preferably 14 to 18% by mass in the total composition.

The fatty acid salt of component (B) functions to solubilize component (C) together with component (A). Furthermore, by improving the speed of rinsing and giving the skin a crisp feel after rinsing, it has the role of emphasizing the feeling of bare skin.
As the fatty acid salt of component (B), general formula (1)
R ¹ -COOM ¹ (1)

(In the formula, R ¹ represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms, and M ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine-derived ammonium, tris(hydroxymethyl ) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine)
Those represented by are preferable. In addition, from the viewpoint of maintaining low-temperature stability after long-term storage and improving the speed of rinsing and the feeling of bare skin immediately after rinsing, R ¹ preferably has 10 to 20 carbon atoms, more preferably 12 to 18 carbon atoms. More preferred.

More specifically, one or two or more fatty acid salts whose fatty acid moiety is selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, and behenic acid are included. Among these, the fatty acid part is selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid and oleic acid from the viewpoint of widening the solubilization temperature range and improving the speed of rinsing and the feeling of bare skin immediately after rinsing. It is preferable that the fatty acid portion contains at least one or two or more fatty acid salts selected from lauric acid, myristic acid, palmitic acid, stearic acid and isostearic acid. More preferably, the fatty acid portion contains three or more fatty acid salts selected from lauric acid, myristic acid, palmitic acid, stearic acid and isostearic acid, and the fatty acid portion contains lauric acid, myristic acid, palmitic acid and stearic acid. and fatty acid salts of isostearic acid.

Salts of fatty acid salts include alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; alkanolamine-derived ammonium such as monoethanolamine, diethanolamine and triethanolamine; Methane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine.

The fatty acid salt of component (B) can be present in the composition by, for example, mixing an unneutralized fatty acid with a neutralizing agent to form a fatty acid salt.
Neutralizing agents are compounds exhibiting basic properties such as sodium hydroxide, potassium hydroxide, triethanolamine, tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, ornithine and the like.

In general, anionic surfactants are highly irritating when they come into contact with the eyes. On the other hand, in the case of removing makeup, it is easy to get into the eyes due to actions such as carefully blending to remove the makeup around the eyes, and if it is painful when it gets into the eyes, the makeup cannot be removed sufficiently. Since the solubilized composition of the present invention also contains an anionic surfactant as component (B), it is required not to cause severe pain to the eyes. In addition, it is also required to maintain the speed of rinsing and the feeling of bare skin immediately after rinsing. From these points of view, (b1) fatty acid salts whose salts are selected from alkali metals, alkaline earth metals, ammonium and ammonium derived from alkanolamines, and (b2) salts whose salts are tris(hydroxymethyl)aminomethane, aminomethylpropanol, amino (b1) a fatty acid salt wherein the salt is selected from alkali metals and (b2) a salt of tris(hydroxymethyl)aminomethane. , aminomethylpropanol, aminomethylpropanediol and arginine; (b1) a fatty acid salt wherein the salt is selected from potassium and sodium; and aminomethylpropanediol; (b1) fatty acid potassium salt and (b2) fatty acid tris(hydroxymethyl)aminomethane salt.

The content molar ratio of component (b1) to component (b2) [(b1)/(b2)] is 0.3 or more from the viewpoint of reducing pain when it gets in the eyes while maintaining the speed of rinsing. preferably 0.4 or more, more preferably 0.5 or more, preferably 2.5 or less, more preferably 2.0 or less. It is more preferably 5 or less.

The content of component (B) in terms of fatty acid in the solubilized skin cleanser composition is 0 in the entire composition from the viewpoint of improving the speed at which the sliminess disappears during rinsing and improving the bare skin feel after rinsing. .1% by mass or more, preferably 0.6% by mass or more, more preferably 0.9% by mass or more, and from the viewpoint of maintaining low-temperature stability, it is 4% by mass or less, preferably 3% by mass or less; % by mass or less is more preferable. The content of component (B) is 0.1 to 4% by mass, preferably 0.6 to 3% by mass, more preferably 0.9 to 2% by mass in the total composition.
Here, the content in terms of fatty acid is calculated by converting the content of the fatty acid salt into the corresponding fatty acid (for example, in the case of potassium salt of stearic acid, the corresponding fatty acid is stearic acid). .

In the present invention, the content ratio of component (B) to component (A) [(B)/(A)] is 0.060 or more, preferably 0.065 or more, from the viewpoint of widening the solubilization temperature range. It is more preferably 0.070 or more, 0.35 or less, preferably 0.27 or less, more preferably 0.26 or less, and even more preferably 0.25 or less. In addition, let content of a component (B) be a fatty-acid conversion value. Further, the content ratio of component (B) to component (A) [(B)/(A)] is 0.06 to 0.35, preferably 0.065 to 0.27, and 0.07 to 0. 0.26 is more preferred, and 0.07 to 0.25 is even more preferred.
In addition, content of said component (B) uses content of said fatty acid conversion.

The component (C) oil agent acts on make-up stains and has a function of dissolving or dispersing them. As the component (C) oil agent, any one can be used as long as it is used in ordinary detergent compositions.
Liquid oils that are commonly used in cosmetics can be used as such oils, for example, isododecane, isohexadecane, liquid paraffin, liquid isoparaffin, hydrogenated polyisobutene, hydrocarbon oils such as squalane; cholesteryl isostearate, palmitin. isopropyl acid, isopropyl myristate, neopentyl glycol dicaprate, isopropyl isostearate, octadecyl myristate, cetyl 2-ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, tri(2-ethylhexanoic acid) glycerin, tri(caprylic acid) Capric acid) ester oils such as glycerin; ether oils such as dilauryl ether, dicaprylyl ether, cetyl-1,3-dimethylbutyl ether, nonylphenyl ether; dimethylcyclos such as octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane Polysiloxane; silicone oils such as tris(trimethylsilyl)methylsilane, tetrakis(trimethylsilyl)silane, dimethylpolysiloxane, and methylphenylpolysiloxane; alcohols such as isostearyl alcohol, hexyldecanol, and octyldodecanol; animal and plant oils such as olive oil; terpene oils, etc. can be used. These can be used singly or in combination of two or more.

The oil agent of component (C) preferably contains (c1) an oil agent with a viscosity of 15 mPa·s or less at 30° C. from the viewpoint of exhibiting high solubility of oily mascara and improving the bare skin feeling immediately after rinsing. , more preferably 12 mPa s or less, more preferably 10 mPa s or less, and preferably 1 mPa s or more from the viewpoint of suppressing dripping during application and maintaining safety, 3 mPa·s or more is more preferable.
Here, in measuring the viscosity, a B-type viscometer (manufactured by Toki Sangyo Co., Ltd.: TVB-10R type viscometer, measurement conditions: rotor No. 1, 60 rpm, 60 seconds) is used to measure the viscosity at 30 ° C. do.

Component (c1) is one or more selected from hydrocarbon oils, ether oils, and silicone oils from the viewpoint of maintaining a wide solubilization temperature range and improving long-term storage stability and oil-based mascara solubility. It preferably contains two or more kinds, more preferably contains one or more kinds selected from hydrocarbon oils and ether oils, and more preferably contains at least hydrocarbon oils.
From the above viewpoint, the hydrocarbon preferably contains one or more selected from liquid isoparaffin, isododecane and isohexadecane, and more preferably contains one or two selected from isododecane and isohexadecane. .
From the above viewpoint, the ether oil preferably contains one or more selected from dilauryl ether, dicaprylyl ether and cetyl-1,3-dimethylbutyl ether.
As the silicone oil, from the above point of view, dimethylpolysiloxane, octamethylcyclotetrasiloxane, ^{decamethylcyclopentasiloxane} , tris(trimethylsilyl)methylsilane, tetrakis ( trimethylsilyl)silane, preferably contains one or more selected from methylphenylpolysiloxane, and has a viscosity of 1.5 to 2 mm ² /s dimethylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, tris It preferably contains one or more selected from (trimethylsilyl)methylsilane.

The content mass ratio [(c1)/(C)] of component (c1) in component (C) is 0.00, from the viewpoint of improving the solubility of oil-based mascara and improving the speed at which sliminess disappears during rinsing. 5 or more is preferable, 0.6 or more is more preferable, 0.7 or more is still more preferable, 0.99 or less is preferable, 0.97 or less is more preferable, and 0.93 or less is even more preferable.

In order to widen the solubilization temperature range, the component (C) oil agent preferably contains (c2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms. From the viewpoint of widening the solubilization temperature range, the carbon number of the saturated or unsaturated branched alcohol having 15 or more carbon atoms is preferably 16 or more, more preferably 17 or more, further preferably 18 or more, preferably 22 or less, and 21 or less. is more preferable, and 20 or less is even more preferable. Moreover, from the viewpoint of improving long-term storage stability, it preferably contains a saturated branched alcohol, and more preferably contains a saturated branched monohydric alcohol.
Specifically, the saturated or unsaturated branched alcohol having 15 or more carbon atoms is selected from hexyldecanol, isostearyl alcohol and octyldodecanol from the viewpoint of widening the solubilization temperature range and improving long-term storage stability. It preferably contains one or more, more preferably one or two selected from isostearyl alcohol and octyldodecanol, and even more preferably isostearyl alcohol.

The content mass ratio [(c2)/(C)] of component (c2) in component (C) is preferably 0.01 or more from the viewpoint of improving the bare skin feel immediately after rinsing and widening the solubilization temperature range. 0.03 or more is more preferable, 0.07 or more is more preferable, 0.30 or less is preferable, 0.25 or less is more preferable, and 0.22 or less is even more preferable.

The content of the component (C) in the skin cleanser composition is 5% by mass or more, preferably 7% by mass or more, and 9% by mass or more in the total composition from the viewpoint of improving the solubility of the oily mascara. is more preferably 10% by mass or more, 20% by mass or less to maintain long-term storage stability, preferably 16% by mass or less, more preferably 14% by mass or less, and even more preferably 12% by mass or less . The content of component (C) is 5 to 20% by mass, preferably 7 to 16% by mass, more preferably 9 to 14% by mass, and even more preferably 10 to 12% by mass in the total composition.

The water-soluble solvent of component (D) forms an aqueous phase together with the water of component (F) and plays a role in adjusting the HL balance by controlling the solubility of the surfactant in the aqueous phase. It also has the role of suppressing the dryness of the skin afterward.
The water-soluble solvent of component (D) is not limited as long as it is used in ordinary cosmetics. It is preferable to contain a water-soluble solvent having an IOB value of 1.5 to 6.0, more preferably 1.6 to 4.0, and a water-soluble solvent having an IOB value of 1.7 to 3.4. It is more preferable to contain a polar solvent. As the water-soluble solvent, one or more selected from monohydric alcohols and polyhydric alcohols should be used from the viewpoint of having good compatibility with the component (F) and suppressing dryness of the skin after use. is preferred.
Here, the IOB value is an abbreviation of Inorganic/Organic Balance (inorganic/organic ratio), which is a value representing the ratio of the inorganic value to the organic value, and is an index indicating the degree of polarity of an organic compound. It will be. Specifically, it is expressed as IOB value=inorganic value/organic value. For each of the "inorganicity value" and the "organicity value", for example, the "organicity value" for one carbon atom in the molecule is 20, and the "inorganicity value" for one hydroxyl group in the molecule is 100. "Inorganic value" and "organic value" are set according to various atoms or functional groups, and the "inorganic value" and "organic value" of all atoms and functional groups in organic compounds are integrated. Thus, the IOB value of the organic compound can be calculated (see, for example, Yoshio Koda, "Organic Conceptual Diagram-Basics and Applications-" pp. 11-17, Sankyo Publishing, 1984).

Component (D) includes, for example, monohydric alcohols such as ethanol, propanol, isopropanol, butanol and isobutanol; ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, 1,3-butylene glycol and 1,4-butylene glycol. , hexylene glycol, isoprene glycol and other glycols, glycerin, diglycerin and other glycerins, sorbitol, maltitol, maltose, fructose, xylitol, maltotriose, threitol, erythritol, glucose and other sugars, methyl glucoside, ethyl glucoside and polyhydric alcohols such as sugar derivatives such as

Among these, ethanol (IOB: 2.5), propylene glycol (IOB: 3.3), dipropylene glycol (IOB: 1.8), 1,3-butylene glycol (IOB: 2.5), isoprene glycol (IOB: 2.2), glycerin (IOB: 5.0), diglycerin (IOB: 3.5), sorbitol ( IOB: 5.0) and maltitol (IOB: 4.4), preferably one or more selected from ethanol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, isoprene glycol and diglycerin. It is more preferable to contain one or more selected types, and it is further preferable to contain one or more selected from ethanol, propylene glycol, dipropylene glycol, 1,3-butylene glycol and isoprene glycol.

The content of the component (D) in the solubilized skin cleanser composition is 10% by mass or more, preferably 20% by mass or more in the total composition, from the viewpoint of widening the solubilization temperature range and suppressing stickiness after rinsing. is preferably 30% by mass or more, more preferably 35% by mass or more, 60% by mass or less, preferably 55% by mass or less, more preferably 50% by mass or less, and even more preferably 45% by mass or less. The content of component (D) is 10 to 60% by mass, preferably 20 to 55% by mass, more preferably 30 to 50% by mass, and even more preferably 35 to 45% by mass in the total composition.

The content ratio of component (D) to component (F) [(D)/(F)] is preferably 0.5 or more, and 1.0, from the viewpoint of widening the solubilization temperature range and suppressing stickiness after rinsing. 1.2 or more is more preferable, 4.0 or less is preferable, 2.0 or less is more preferable, and 1.8 or less is even more preferable. Further, the content ratio of component (D) to component (F) [(D)/(F)] is preferably 0.5 to 4.0, more preferably 1.0 to 2.0, and 1.2 to 1.8 is more preferred.

Component (E) is a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine.
These bases are not in salt form (without forming a salt such as a fatty acid salt with an acidic component such as a fatty acid), but are present in the composition in a free form.
Since the solubilized skin cleansing composition of the present invention contains a fatty acid salt, it has an alkaline pH. However, under long-term storage in the coexistence of water, hydrolysis of the nonionic surfactant tends to occur, free fatty acids are produced, and the pH of the system gradually decreases. The change also affects the degree of neutralization of fatty acids, making it easier for unneutralized fatty acids to precipitate at low temperatures. In the present invention, the coexistence of component (E) in the solubilized skin cleanser composition neutralizes the free fatty acids produced during long-term storage in the coexistence of water and promotes redissolution.
In addition, in the fatty acid salt of component (B), when the salt (b2) contains a fatty acid salt selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine and when the neutralizing agent for forming the fatty acid salt of (b2) blended in the composition is the same substance as the component (E), necessary for neutralizing the anionic surfactant The one exceeding the minute is regarded as the component (E).
Specifically, in the fatty acid salt of component (B), when the fatty acid is neutralized only with (b2), the amount of the component (E) that exceeds one neutralization equivalent is defined as component (E).
In addition, when an anionic surfactant (G) other than component (B) is used in combination, a separate calculation is performed so that the unneutralized component in component (G) is 1 neutralization equivalent, and component (B) and (G) Find the amount that will give a total of 1 neutralization equivalent. Component (E) is defined as the amount that exceeds one neutralization equivalent of the total of components (B) and (G).
Also, when (b1) and (b2) are used in combination, priority is given to the neutralization of (b1), and when the neutralization equivalent of (b1) is less than 1, (1 neutralization equivalent - component (b1 ) is calculated as component (B). The remaining component (b2) in excess of one neutralization equivalent is referred to as component (E).

The base of component (E) is one selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine, from the viewpoint of widening the solubilization temperature range and improving long-term storage stability. Or preferably contains two or more, more preferably one or more selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol and aminomethylpropanediol, tris(hydroxymethyl)aminomethane and It further preferably contains one or two selected from aminomethylpropanediol, and more preferably contains tris(hydroxymethyl)aminomethane.

In the present invention, the content molar ratio of component (B) to component (E) [(B)/(E)] is 7 from the viewpoint of maintaining long-term low-temperature stability and improving rinsing speed. The following is preferable, 5 or less is more preferable, 3 or less is more preferable, 1.5 or less is still more preferable, 0.05 or more is preferable, 0.2 or more is more preferable, and 0.3 or more is even more preferable. Further, the content molar ratio of component (B) to component (E) [(B)/(E)] is preferably from 0.05 to 7, more preferably from 0.2 to 5, and further from 0.3 to 3. Preferably, 0.3 to 1.5 is even more preferable.
The molar amount of the component (B) is the molar amount in terms of fatty acid, and is calculated by converting the molar amount of the fatty acid salt into the corresponding fatty acid.

The content of component (E) in the solubilized skin cleanser composition is 0.1 in the solubilized skin cleanser composition from the viewpoint of maintaining long-term low-temperature stability and improving rinsing speed. % by mass or more, preferably 0.5% by mass or more, more preferably 0.8% by mass or more, 6% by mass or less, preferably 4% by mass or less, and more preferably 3.5% by mass or less. The content of component (E) is 0.1 to 6% by mass, preferably 0.5 to 4% by mass, more preferably 0.8 to 3.5% by mass in the total composition.

The content of water as the component (F) is 5% by mass or more, preferably 10% by mass or more, in the solubilized skin cleanser composition from the viewpoint of maintaining sufficient detergency and cleanly rinsing off during rinsing. It is more preferably 15% by mass or more, 40% by mass or less, preferably 35% by mass or less, and more preferably 30% by mass or less. The water content of component (F) is 5 to 40% by mass, preferably 10 to 35% by mass, more preferably 15 to 30% by mass, in the total composition.

The solubilized skin cleansing composition of the present invention may further contain an anionic surfactant (G) other than component (B) from the viewpoint of suppressing dry feeling during rinsing and further improving low-temperature stability. can be done.
Component (G) may be one used in ordinary skin cleansers, such as alkylbenzenesulfonates, alkanesulfonates, alkenylsulfonates, alkylsulfonates, acylisethionates, and alkylsulfuric acid esters. salt, alkyl ether sulfate, alkyl sulfosuccinate, sulfo fatty acid methyl ester, fatty acid alkanolamide sulfate, monoacylglycerin sulfate, alkyl phosphate, polyoxyethylene alkyl ether phosphate, alkyl aryl Ether phosphate, fatty acid amide ether phosphate, ether carboxylic acid or its salt, N-acylamino acid salt and the like.

Among these, alkyl sulfate salts are used to suppress the dry feeling caused by fatty acid scum that causes the skin to feel tight, to improve the bare skin feeling immediately after rinsing, to improve the speed of rinsing, and to suppress precipitation at low temperatures. , alkyl ether sulfates, ether carboxylates and N-acyl glutamates, preferably one or more selected from alkyl ether sulfates and ether carboxylates, and one or two selected from alkyl ether sulfates and ether carboxylates. It is more preferable to contain the above, and it is further preferable to contain one or more selected from ether carboxylates.

Examples of alkyl ether sulfate salts include alkyl ether sulfate salts represented by the following general formula (2).
^R2O _{( CH2CH2O} ) _{nSO3M2 (} ² )
(In formula (2), R ² represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms, and M ² is selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium, and glucammonium. represents a cation, n represents the average number of added moles, and is 0.5 to 20)

In general formula (2), R ² is preferably an aliphatic hydrocarbon group having 8 to 16 carbon atoms, more preferably an aliphatic hydrocarbon group having 8 to 14 carbon atoms, from the viewpoint of improving low-temperature stability. Preferred are aliphatic hydrocarbon groups having 10 to 14 carbon atoms.
From the same viewpoint as above, n is preferably 0.5 or more, preferably 12 or less, preferably 5 or less, more preferably 4 or less, and even more preferably 2 or less. A specific range of n is preferably from 0.5 to 12, more preferably from 0.5 to 5, even more preferably from 0.5 to 4, and even more preferably from 0.5 to 2.
From the same viewpoint as above, M ² is preferably an alkali metal or ammonium, more preferably an alkali metal, and still more preferably a sodium salt.

Specific examples of such alkyl ether sulfate salts include polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, polyoxyethylene (1) sodium myristyl ether sulfate, polyoxyethylene ( 2) Sodium lauryl ether sulfate, and polyoxyethylene (2) Sodium myristyl ether sulfate. Among these, it is preferable to include one or more selected from polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, and polyoxyethylene (2) sodium lauryl ether sulfate. In the present specification, the numerical values in parentheses for these compounds mean the average number of added moles of ethylene oxide.
Commercially available alkyl ether sulfate salts include, for example, Emal 125HP (manufactured by Kao Corporation, polyoxyethylene (1) sodium lauryl ether sulfate) and Emal 125A (manufactured by Kao Corporation, polyoxyethylene (1) lauryl ether ammonium sulfate). ), Emal 227 (manufactured by Kao Corporation, sodium polyoxyethylene (2) lauryl ether sulfate), and the like.

Ethercarboxylic acids or salts thereof include ethercarboxylic acids represented by the following general formula (3) or salts thereof.
^R3O _{( CH2CH2O} ) _{mCH2COOM3 (} ³ )
(In the formula (3), R ³ represents an alkyl group or alkenyl group having 10 to 22 carbon atoms, m is the average number of added moles and represents a number of 0.5 to 10, and M ³ is a hydrogen atom or an alkali metal , alkaline earth metals, ammonium or organic ammonium)

In general formula (3), R ³ is preferably an alkyl group having 12 to 14 carbon atoms from the viewpoint of low-temperature stability.
From the same point of view as above, the average added mole number m of ethylene oxide is preferably 2-5.
Alkali metals such as sodium and ^potassium ; alkaline earth metals such as calcium and magnesium; ammonium; alkanolamine-derived ammonium such as monoethanolamine, diethanolamine and triethanolamine; Ammonium derived from basic amino acids and the like can be mentioned. Among these, from the same viewpoint as above, one or more selected from sodium, potassium, triethanolamine, and arginine are preferable, and one or two selected from sodium and potassium are more preferable. .

As such ether carboxylic acid or its salt, from the same viewpoint as above, specifically, polyoxyethylene lauryl ether carboxylic acid or its salt, polyoxyethylene myristyl ether carboxylic acid or its salt, and polyoxyethylene palmityl It preferably contains one or more selected from ether carboxylic acids or salts thereof, and one selected from polyoxyethylene lauryl ether carboxylic acid or salts thereof and polyoxyethylene myristyl ether carboxylic acid or salts thereof. or two, more preferably polyoxyethylene lauryl ether carboxylic acid or a salt thereof.
Commercially available products of such ethercarboxylic acids or salts thereof include AKYPO RLM 45CA (manufactured by Kao Corporation) and AKYPO LM 26C (manufactured by Kao Corporation).

When the component (B) and the component (G) are used together, the content ratio of the component (B) to the total amount of the component (B) and the component (G) [(B)/((B) + (G))] is , from the viewpoint of improving the bare skin feeling immediately after rinsing and improving low temperature stability while maintaining the rinsing speed, it is preferably 0.1 or more, more preferably 0.2 or more, and further preferably 0.3 or more. , is preferably 1 or less, more preferably 0.9 or less, even more preferably 0.7 or less. In addition, let content of a component (B) and a component (G) be an acid conversion value.

When the component (B) and the component (G) are used together, the component (B) is used against the component (A) from the viewpoint of improving the bare skin feeling immediately after rinsing and improving the low temperature stability while maintaining the rinsing speed. and the content ratio [((B)+(G))/(A)] with respect to the total amount of component (G) is preferably 0.11 or more, more preferably 0.12 or more, and still more preferably 0.14 or more. , is preferably 0.70 or less, more preferably 0.60 or less, and even more preferably 0.45 or less. In addition, let content of a component (B) and a component (G) be content of acid conversion.

The solubilized skin cleanser composition of the present invention may further contain (H) an organic acid from the viewpoint of adjusting and maintaining the pH of the system within a predetermined range. Further, from the viewpoint of improving antiseptic performance, one or more selected from the group consisting of hydroxycarboxylic acids and dicarboxylic acids are more preferable, and one or more selected from dicarboxylic acids are more preferable. Specific examples of hydroxycarboxylic acids include glycolic acid, lactic acid, glyceric acid, gluconic acid, pantothenic acid, citric acid and the like. Specific examples of dicarboxylic acids include malic acid, oxalic acid, malonic acid, maleic acid, succinic acid, glutaric acid and adipic acid.
The content of the component (H) in the solubilized skin cleanser composition can be appropriately contained for the purpose of adjusting the pH within the range described later, but the long-term storage stability and the feeling of bare skin immediately after rinsing can be improved. From the viewpoint of maintenance, it is preferably 0.3% by mass or less, more preferably 0.01 to 0.2% by mass, in the solubilized skin cleanser composition.

The solubilized skin cleansing composition of the present invention further contains components used in conventional cleansers, such as surfactants other than the components (A), (B) and (G), and surfactants other than the component (D). Humectants, oily ingredients other than component (C), disinfectants, anti-inflammatory agents, preservatives, chelating agents, thickeners, scrubbing agents, fragrances, cooling agents, pigments, UV absorbers, antioxidants, plant extracts etc. can be contained.

The solubilized skin cleansing composition of the present invention may further contain a cationic surfactant from the viewpoint of improving the smoothness of the skin. From the viewpoint of suppressing sliminess during rinsing, the content of the cationic surfactant is preferably 5% by mass or less, more preferably 3% by mass or less, and even more preferably 1% by mass or less in the total composition. , 0.5% by mass or less, and more preferably not substantially contained.

The solubilized skin cleanser composition of the present invention comprises the following components (A), (B), (C), (D), (E) and (F):
(A) 7 to 30% by mass of nonionic surfactant with HLB 6 to 18,
(B) Fatty acid salt 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.

The solubilized skin cleansing composition is produced by mixing ingredients in a conventional manner. As a specific production method, for example, component (A), component (D), component (E), component (F), optionally component (H), component (G), and other water-soluble components are added. step 1, mixing with optional heating with step 2; adding component (B), component (C) and optionally other oil-soluble ingredients and optionally mixing with heating; may include step 3 of adding the preparation of step 2 to and mixing.

Further, from the viewpoint of reducing foaming during mixing, it is preferable to include step 4 in which a part of component (A) is added in step 1, and the remainder of component (A) is added to the preparation of step 3 and mixed. If component (A) is not added in step 1, step 4 may be included in which the entire amount of component (A) is added to the preparation of step 3 and mixed.
Furthermore, when the component (D) contains an easily evaporated component having a boiling point of 70 ° C. or higher, such as ethanol (component (D)) or a volatile component such as a perfume component, the preparation in step 3 has a boiling point of 70 ° C. It is preferred to include a step 4 of adding and mixing the components above °C and the volatile components at low temperature.
The low temperature means a temperature at which the components with boiling points of 70° C. or higher and volatile components do not evaporate or volatilize, preferably 50° C. or lower, more preferably 40° C. or lower. 10° C. or higher, preferably 20° C. or higher, from the viewpoint of mixing with

The heating in step 1 is optional, and the heating temperature when heating is preferably 10° C. or higher, more preferably 20° C. or higher, from the viewpoint of sufficiently dissolving the aqueous phase components without boiling the water. It is preferably 90° C. or lower, more preferably 85° C. or lower.
Heating in step 2 is optional, and the heating temperature when heating is preferably 50° C. or higher, more preferably 55° C. or higher, from the viewpoint of sufficiently dissolving the oil-soluble component. It is 90° C. or lower, more preferably 85° C. or lower.

The solubilized skin cleansing composition of the present invention preferably has a pH of 7 to 11, more preferably 7 to 10 at 30°C, from the viewpoint of reducing skin irritation and improving the feel of bare skin immediately after rinsing. pH 7-9.5 is more preferred, and pH 7.5-9.5 is even more preferred.
During production, hydrolysis of the nonionic surfactant is likely to occur under long-term storage in the presence of water, free fatty acids are generated, and the pH of the system may gradually decrease. The pH is preferably 11, more preferably pH 8 to 10, still more preferably pH 8 to 9.5, and even more preferably pH 8.5 to 9.5.
Here, the pH is measured by the measuring method described in Examples.

In addition, the solubilized skin cleansing composition of the present invention preferably has a viscosity at 30°C of 300 mPa·s or less, preferably 150 mPa, from the viewpoint of improving compatibility with makeup stains and improving solubility of oily mascara. · s or less is more preferable, 80 mPa · s or less is more preferable, and from the viewpoint of suppressing dripping during application, 5 mPa · s or more is preferable, 10 mPa · s or more is more preferable, and 20 mPa · s or more is even more preferable.
Here, in measuring the viscosity, a B-type viscometer (manufactured by Toki Sangyo Co., Ltd.: TVB-10R type viscometer, measurement conditions: rotor No. 1, 60 rpm, 60 seconds) is used to measure the viscosity at 30 ° C. do.

The solubilized skin cleanser composition of the present invention exhibits a transparent to translucent appearance. Transparency and semi-transparency are evaluated by the evaluation method described in Examples.

The solubilized skin cleanser composition of the present invention can be applied to the skin, preferably the skin excluding the scalp, more preferably any part of the face, body, limbs, etc., and still more preferably the face. .

The solubilized skin cleanser composition of the present invention is excellent in removing makeup cosmetics, and after rinsing, it gives a bare skin feeling as if it had been used with a facial cleanser. It can be suitably used as both a make-up remover and a facial cleanser that can exert the effect of cleansing (foundation, mascara, eye shadow, sunscreen, lipstick, etc.) and a facial cleanser in one agent.
Also, the solubilized skin cleanser composition of the present invention is suitable for use as a makeup remover.
The solubilized skin cleansing composition of the present invention can be used, for example, by applying it to the skin with makeup, letting the makeup blend in, and then rinsing it off with water. It can also be used by applying it to cotton or the like, wiping off the makeup-applied skin, and then rinsing it off.

In relation to the above-described embodiments, the present invention further discloses the following compositions.

<1> The following components (A), (B), (C), (D), (E) and (F):
(A) 7 to 30% by mass of nonionic surfactant with HLB 6 to 18,
(B) Fatty acid salt 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
and wherein the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.

<2> The nonionic surfactant of component (A) preferably has an HLB of 7 to 12.5, more preferably an HLB of 8 to 12.3, and even more preferably an HL of 9 to 12.0. A solubilized skin cleanser composition.
<3> The nonionic surfactant of component (A) is preferably (a1) a nonionic surfactant with an HLB of 6 to 8, (a2) a nonionic surfactant with an HLB greater than 13 and 18 or less, and (a3) branched It preferably contains two or more nonionic surfactants selected from nonionic surfactants having an alkyl group or two or more alkyl groups and having an HLB greater than 8 and 13 or less, and (a1) a nonionic surfactant having an HLB of 6 to 8 and (a2) one or more selected from nonionic surfactants having an HLB of 13 or more and 18 or less, and (a3) a nonionic surfactant having an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups. It more preferably contains a surfactant, and more preferably contains one or more selected from component (a1), one or more selected from component (a2), and one or more selected from component (a3). The solubilized skin cleanser composition according to 1> or <2>.

<4> (a1) The nonionic surfactant having an HLB of 6 to 8 preferably contains one or more selected from diglyceryl isostearate, diglyceryl oleate and isostearyl glyceryl ether, and diglyceryl isostearate and diglyceryl oleate, more preferably diglyceryl isostearate.
<5> (a2) Nonionic surfactants with HLB greater than 13 and 18 or less, preferably polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acids having an alkyl group having 8 to 18 carbon atoms It contains one or more selected from esters and alkylglucosides, more preferably contains one or more selected from polyoxyethylene fatty acid esters and alkylglucosides, polyoxyethylene (12) monolaurate and The solubilized skin cleanser composition according to <3> or <4>, which further preferably contains one or two selected from decylglucoside.

<6> (a3) A nonionic surfactant having an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups, preferably polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol One or more selected from fatty acid esters, polyoxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters, including polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitol fatty acid esters and polyoxyethylene More preferably, it contains one or more selected from glycerin fatty acid esters, such as polyoxyethylene (12) monoisostearate, polyoxyethylene (30) sorbitol tetraoleate, and polyoxyethylene (20) sorbitan trioleate. and polyoxyethylene (8) glyceryl monoisostearate.

<7> Component (A) includes one or more selected from component (a1) and component (a2) and component (a3), and component (a1) and component (a2) for component (a3) ) is preferably 3.0 or more, more preferably 4.5 or more, even more preferably 5.0 or more, The solubilized skin cleanser composition according to any one of <3> to <6>, which is preferably 10 or less, more preferably 9 or less, and further preferably 8 or less.
<8> Component (A) includes component (a1) and component (a2), and the content ratio of component (a1) to component (a2) [(a1)/(a2)] is preferably 0.4 Above, 0.6 or more is more preferable, 0.8 or more is more preferable, 8 or less is preferable, 2.4 or less is more preferable, and 1.6 or less is more preferable <3> to <7> A solubilized skin cleanser composition according to any one of the above.

<9> The content of component (A) is preferably 10% by mass or more in the total composition, more preferably 12% by mass or more, further preferably 14% by mass or more, and preferably 25% by mass or less, The solubilized skin cleanser composition according to any one of <1> to <8>, which is more preferably 20% by mass or less, further preferably 18% by mass or less.

<10> The fatty acid salt of component (B) is preferably represented by general formula (1)
R ¹ -COOM ¹ (1)
(In the formula, R ¹ represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms, and M ¹ represents an alkali metal, alkaline earth metal, ammonium, alkanolamine-derived ammonium, tris(hydroxymethyl ) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine)
The solubilized skin cleanser composition according to any one of <1> to <9> above, which is represented by

<11> The fatty acid salt of component (B) is preferably present in the composition by mixing an unneutralized fatty acid with a neutralizing agent to form a fatty acid salt. The solubilized skin cleanser composition according to any one of <1> to <10> above.
<12> Component (B) is preferably (b1) a fatty acid salt whose salt is selected from alkali metal, alkaline earth metal, ammonium and ammonium derived from alkanolamine, and (b2) salt is tris(hydroxymethyl)amino fatty acid salts selected from methane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine; (b1) fatty acid salts wherein the salts are selected from alkali metals; more preferably comprises a fatty acid salt selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine; (b1) a fatty acid salt wherein the salt is selected from potassium and sodium, and (b2) a salt more preferably comprises a fatty acid salt selected from tris(hydroxymethyl)aminomethane and aminomethylpropanediol; (b1) fatty acid potassium salt and (b2) fatty acid tris(hydroxymethyl)aminomethane salt. The solubilized skin cleanser composition according to any one of the above <1> to <11> is preferred.

<13> The content molar ratio of component (b1) to component (b2) [(b1)/(b2)] is preferably 0.3 or more, more preferably 0.4 or more, and 0.5 or more. is more preferably 2.5 or less, more preferably 2.0 or less, and even more preferably 1.5 or less.
<14> The content of component (B) is preferably 0.6% by mass or more, more preferably 0.9% by mass or more, and preferably 3% by mass or less in terms of fatty acid in the total composition, The solubilized skin cleanser composition according to any one of <1> to <13>, which is more preferably 2% by mass or less.
<15> The content ratio of component (B) to component (A) [(B)/(A)] is preferably 0.065 or more, more preferably 0.070 or more, and 0.27 or less. The solubilized skin cleanser composition according to any one of the above <1> to <14>, which is preferably 0.26 or less, and further preferably 0.25 or less.

<16> The oil agent of component (C) preferably contains (c1) an oil agent having a viscosity of 15 mPa·s or less at 30°C, and is one or more selected from hydrocarbon oils, ether oils, and silicone oils. more preferably contains one or more selected from hydrocarbon oils and ether oils, and more preferably contains at least hydrocarbon oils Any of the above <1> to <15> 2. The solubilized skin cleanser composition according to claim 1.
<17> The content mass ratio [(c1)/(C)] of component (c1) in component (C) is preferably 0.5 or more, more preferably 0.6 or more, and 0.7 0.99 or less is more preferable, 0.97 or less is more preferable, and 0.93 or less is even more preferable.

<18> The oil agent of component (C) preferably contains (c2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms, and is one or two selected from hexyldecanol, isostearyl alcohol and octyldodecanol. Any of the above <1> to <17> preferably contains the above, more preferably contains one or two selected from isostearyl alcohol and octyldodecanol, and further preferably contains isostearyl alcohol 2. The solubilized skin cleanser composition according to 1.
<19> The content mass ratio [(c2)/(C)] of component (c2) in component (C) is preferably 0.01 or more, more preferably 0.03 or more, and 0.07 0.30 or less is more preferable, 0.25 or less is more preferable, and 0.22 or less is even more preferable.

<20> The content of component (C) is preferably 7% by mass or more in the total composition, more preferably 9% by mass or more, still more preferably 10% by mass or more, and preferably 16% by mass or less, The solubilized skin cleanser composition according to any one of <1> to <19>, which is more preferably 14% by mass or less, and further preferably 12% by mass or less.
<21> The water-soluble solvent of component (D) preferably has an IOB value of 1.5 to 6, more preferably 1.6 to 4.0, even more preferably 1.7 to 3.4. The solubilized skin cleanser composition according to any one of <1> to <20>.
<22> The water-soluble solvent of component (D) is preferably one or more selected from monohydric alcohols and polyhydric alcohols, and is ethanol, propylene glycol, dipropylene glycol, 1,3- It is more preferable to contain one or more selected from butylene glycol, isoprene glycol and diglycerin, and one or two selected from ethanol, propylene glycol, dipropylene glycol, 1,3-butylene glycol and isoprene glycol. The solubilized skin cleanser composition according to any one of <1> to <21>, which further preferably contains at least one seed.

<23> The content of component (D) is preferably 20% by mass or more in the total composition, more preferably 30% by mass or more, further preferably 35% by mass or more, and preferably 55% by mass or less, The solubilized skin cleanser composition according to any one of <1> to <22>, which is more preferably 50% by mass or less, and further preferably 45% by mass or less.
<24> The content ratio of component (D) to component (F) [(D)/(F)] is preferably 0.5 or more, more preferably 1.0 or more, and 1.2 or more. The solubilized skin cleanser composition according to any one of <1> to <23>, more preferably 4 or less, more preferably 2 or less, and even more preferably 1.8 or less.

<25> Component (E) is a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, not in a salt form (fatty acid The solubilized skin cleanser according to any one of the above <1> to <24>, which is present in the composition in a free form without forming a salt such as a fatty acid salt with such an acidic component. Composition.
<26> The base of component (E) preferably contains one or more selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine, and tris(hydroxymethyl)amino More preferably, one or more selected from methane, aminomethylpropanol and aminomethylpropanediol, and one or two selected from tris(hydroxymethyl)aminomethane and aminomethylpropanediol. The solubilized skin cleanser composition according to any one of <1> to <25>, more preferably containing tris(hydroxymethyl)aminomethane.

<27> The content molar ratio of component (B) to component (E) [(B)/(E)] is preferably 7 or less, more preferably 5 or less, still more preferably 3 or less. 5 or less is more preferable, 0.05 or more is preferable, 0.2 or more is more preferable, and 0.3 or more is even more preferable. .
<28> The content of component (E) is preferably 0.5% by mass or more in the total composition, more preferably 0.8% by mass or more, preferably 4% by mass or less, and 3.5% by mass % or less, the solubilized skin cleanser composition according to any one of <1> to <27>.

<29> The content of water in component (F) is preferably 10% by mass or more in the total composition, more preferably 15% by mass or more, preferably 35% by mass or less, and more preferably 30% by mass or less. The solubilized skin cleanser composition according to any one of the above <1> to <28> is preferred.
<30> Further, (G) contains an anionic surfactant other than component (B), and is selected from alkyl sulfate, alkyl ether sulfate, ether carboxylate and N-acyl glutamate, or The solubilization according to any one of <1> to <29> above preferably contains two or more, and more preferably contains one or more selected from alkyl ether sulfates and ether carboxylates. A skin cleanser composition.

<31> Alkyl ether sulfate is preferably represented by the following general formula (2)
^R2O _{( CH2CH2O} ) _{nSO3M2 (} ² )
(In formula (2), R ² represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms, and M ² is selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium, and glucammonium. represents a cation, n represents the average number of added moles, and is 0.5 to 20)
and contains one or more selected from polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, and polyoxyethylene (2) sodium lauryl ether sulfate The solubilized skin cleanser composition according to <30>, which is more preferred.

<32> Ethercarboxylic acid or a salt thereof is preferably represented by the following general formula (3)
^R3O _{( CH2CH2O} ) _{mCH2COOM3 (} ³ )
(In the formula (3), R ³ represents an alkyl group or alkenyl group having 10 to 22 carbon atoms, m is the average number of added moles and represents a number of 0.5 to 10, and M ³ is a hydrogen atom or an alkali metal , alkaline earth metals, ammonium or organic ammonium)
Represented by one selected from polyoxyethylene lauryl ether carboxylic acid or salts thereof, polyoxyethylene myristyl ether carboxylic acid or salts thereof, and polyoxyethylene palmityl ether carboxylic acid or salts thereof, or It is more preferable to contain two or more, more preferably one or two selected from polyoxyethylene lauryl ether carboxylic acid or a salt thereof and polyoxyethylene myristyl ether carboxylic acid or a salt thereof. The solubilized skin cleanser composition according to <30>, which further preferably contains ethylene lauryl ether carboxylic acid or a salt thereof.

<33> It is preferable to use the component (B) and the component (G) together, and the content ratio of the component (B) to the total amount of the component (B) and the component (G) [(B)/((B) + ( G))] is preferably 0.1 or more, more preferably 0.2 or more, still more preferably 0.3 or more, preferably 1 or less, more preferably 0.9 or less, and 0.7 or less. The solubilized skin cleanser composition according to any one of <30> to <32>, wherein is more preferred.
<34> It is preferable to use the component (B) and the component (G) together, and the content ratio of the total amount of the component (B) and the component (G) to the component (A) [((B) + (G)) / (A)] is preferably 0.11 or more, more preferably 0.12 or more, still more preferably 0.14 or more, preferably 0.70 or less, more preferably 0.60 or less, and 0.14 or more. The solubilized skin cleanser composition according to any one of <30> to <33>, which is more preferably 45 or less.

<35> Further, (H) preferably contains an organic acid, more preferably one or more selected from the group consisting of hydroxycarboxylic acids and dicarboxylic acids, and more preferably one or more selected from dicarboxylic acids. The solubilized skin cleanser composition according to any one of <1> to <34>.
<36> The solubilized skin according to <35>, wherein the content of component (H) is preferably 0.3% by mass or less in the total composition, and more preferably 0.01 to 0.2% by mass. cleaning composition.
<37> The content of the cationic surfactant is preferably 5% by mass or less in the total composition, more preferably 3% by mass or less, even more preferably 1% by mass or less, and 0.5% by mass or less The solubilized skin cleanser composition according to any one of <1> to <36> above, which is more preferably substantially free of.

<38> At 30°C, the pH is preferably from 7 to 11, more preferably from 7 to 10, more preferably from 7 to 9.5, and even more preferably from 7.5 to 9.5. 37> the solubilized skin cleanser composition according to any one of the above.
<39> During production, the pH is preferably 8 to 11, more preferably pH 8 to 10, still more preferably pH 8 to 9.5, and still more preferably pH 8.5 to 9.5 <1> to <38 The solubilized skin cleanser composition according to any one of >.
<40> Viscosity at 30°C is preferably 300 mPa s or less, more preferably 150 mPa s or less, still more preferably 80 mPa s or less, preferably 5 mPa s or more, and more preferably 10 mPa s or more. , more preferably 20 mPa·s or more, the solubilized skin cleanser composition according to any one of the above <1> to <39>.

<41> The solubilized skin cleanser composition according to any one of <1> to <40>, which preferably exhibits a transparent to translucent appearance.
<42> The application site is preferably the skin, more preferably the skin excluding the scalp, more preferably any site such as the face, body, limbs, etc., and more preferably the face <1 > to the solubilized skin cleanser composition according to any one of <41>.
<43> The solubilized skin cleanser composition according to any one of the above <1> to <42>, which is used by applying it to the skin with make-up, allowing it to blend in, and then rinsing it off with water.

<44> The following components (A), (B), (C), (D), (E) and (F):
(A) 7 to 30% by mass of nonionic surfactant with HLB 6 to 18,
(B) Fatty acid salt 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
A solubilized skin cleanser composition obtained by blending the component (B) to the component (A) in a ratio (B)/(A) of 0.06 to 0.35.

<45> The following components (A), (B), (C), (D), (E) and (F):
(A) 7 to 30% by mass of nonionic surfactant with HLB 6 to 18,
(B) Fatty acid salt 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.

<46> Component (A), component (D), component (E), component (F), optionally component (H), component (G), and other water-soluble components are added and optionally heated. Step 1 of mixing; Step 2 of adding component (B), component (C) and optionally other oil-soluble ingredients and optionally mixing with heating; The method for producing a solubilized skin cleanser composition according to <45>, comprising the step 3 of additionally mixing.

<47> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) a nonionic surfactant with an HLB of 6 to 8, (a2) a nonionic surfactant with an HLB of 13 or more and 18 or less, and (a3) an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups 7 to 30% by mass of a nonionic surfactant having an HLB of 6 to 18 when mixed, containing two or more nonionic surfactants selected from the nonionic surfactants of
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, alkaline earth metals, ammonium and alkanolamine-derived ammonium, and (b2) salts of tris(hydroxymethyl)aminomethane, Fatty acid salt containing one or more fatty acid salts selected from aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and has a pH of 7 to 11 at 30°C. .

<48> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) 1 or 2 or more selected from nonionic surfactants with HLB 6 to 8, (a2) 1 or 2 or more selected from nonionic surfactants with HLB greater than 13 and 18 or less and ( a3) a nonionic surfactant having an HLB of 6 to 18 when mixed, which contains a nonionic surfactant having an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups, 7 to 30% by mass;
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, alkaline earth metals, ammonium and alkanolamine-derived ammonium, and (b2) salts of tris(hydroxymethyl)aminomethane, Fatty acid salt containing one or two fatty acid salts selected from aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine,
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and the content of component (b1) to component (b2) of component (B) A solubilized skin cleanser composition having a molar ratio [(b1)/(b2)] of 0.3 to 2.5.

<49> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) one or more nonionic surfactants having an HLB of 6 to 8 selected from diglyceryl isostearate, diglyceryl oleate and isostearyl glyceryl ether; (a2) alkyl having 8 to 18 carbon atoms; one or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters and alkyl glucosides having groups, and one selected from polyoxyethylene fatty acid esters and alkyl glucosides or two or more selected from nonionic surfactants having HLB greater than 13 and 18 or less and (a3) polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, poly HLB at the time of mixing, containing a nonionic surfactant with HLB greater than 8 and 13 or less having one or more branched alkyl groups or two or more alkyl groups selected from oxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters 7 to 30% by mass of a nonionic surfactant having a value of 6 to 18,
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, ammonium and ammonium derived from alkanolamines, and (b2) salts from tris(hydroxymethyl)aminomethane and aminomethylpropanediol Fatty acid salt containing one or two selected fatty acid salts 0.1 to 4% by mass in terms of fatty acid,
(C) (c1) an oil agent having a viscosity of 15 mPa·s or less at 30°C and (c2) an oil agent containing a saturated or unsaturated branched alcohol having 15 or more carbon atoms, 5 to 20% by mass,
(D) 10 to 60% by mass of a water-soluble solvent having an IOB value of 1.5 to 6,
(E) 0.1 to 6% by mass of one or two bases selected from tris(hydroxymethyl)aminomethane and aminomethylpropanediol,
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and component (B) contains component (b1) to component (b2) The molar ratio [(b1)/(b2)] is 0.3 to 2.5, and the molar ratio of component (B) to component (E) [(B)/(E)] is 0.05. A solubilized skin cleanser composition that is ~7.

<50> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) a nonionic surfactant with an HLB of 6 to 8, (a2) a nonionic surfactant with an HLB of 13 or more and 18 or less, and (a3) an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups 7 to 30% by mass of a nonionic surfactant having an HLB of 6 to 18 when mixed, containing two or more nonionic surfactants selected from the nonionic surfactants of
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, alkaline earth metals, ammonium and alkanolamine-derived ammonium, and (b2) salts of tris(hydroxymethyl)aminomethane, Fatty acid salt containing one or more fatty acid salts selected from aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and the solubilized skin cleanser composition has a pH of 7 to 11 at 30°C. thing.

<51> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) 1 or 2 or more selected from nonionic surfactants with HLB 6 to 8, (a2) 1 or 2 or more selected from nonionic surfactants with HLB greater than 13 and 18 or less and ( a3) a nonionic surfactant having an HLB of 6 to 18 when mixed, which contains a nonionic surfactant having an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups, 7 to 30% by mass;
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, alkaline earth metals, ammonium and alkanolamine-derived ammonium, and (b2) salts of tris(hydroxymethyl)aminomethane, Fatty acid salt containing one or two fatty acid salts selected from aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine,
(F) water 5 to 40 mass%
is blended, and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and the molar content of component (b1) to component (b2) of component (B) A solubilized skin cleanser composition having a ratio [(b1)/(b2)] of 0.3 to 2.5.

<52> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) one or more nonionic surfactants having an HLB of 6 to 8 selected from diglyceryl isostearate, diglyceryl oleate and isostearyl glyceryl ether; (a2) alkyl having 8 to 18 carbon atoms; one or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters and alkyl glucosides having groups, and one selected from polyoxyethylene fatty acid esters and alkyl glucosides or two or more selected from nonionic surfactants having HLB greater than 13 and 18 or less and (a3) polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, poly HLB at the time of mixing, containing a nonionic surfactant with HLB greater than 8 and 13 or less having one or more branched alkyl groups or two or more alkyl groups selected from oxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters 7 to 30% by mass of a nonionic surfactant having a value of 6 to 18,
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, ammonium and ammonium derived from alkanolamines, and (b2) salts from tris(hydroxymethyl)aminomethane and aminomethylpropanediol Fatty acid salt containing one or two selected fatty acid salts 0.1 to 4% by mass in terms of fatty acid,
(C) (c1) an oil agent having a viscosity of 15 mPa·s or less at 30°C and (c2) an oil agent containing a saturated or unsaturated branched alcohol having 15 or more carbon atoms, 5 to 20% by mass,
(D) 10 to 60% by mass of a water-soluble solvent having an IOB value of 1.5 to 6,
(E) 0.1 to 6% by mass of one or two bases selected from tris(hydroxymethyl)aminomethane and aminomethylpropanediol,
(F) water 5 to 40 mass%
is blended, and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and component (B) is the content of component (b1) to component (b2). The ratio [(b1)/(b2)] is 0.3 to 2.5, and the molar ratio of component (B) to component (E) [(B)/(E)] is 0.05 to 7. A solubilized skin cleanser composition obtained as

<53> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) a nonionic surfactant with an HLB of 6 to 8, (a2) a nonionic surfactant with an HLB of 13 or more and 18 or less, and (a3) an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups 7 to 30% by mass of a nonionic surfactant having an HLB of 6 to 18 when mixed, containing two or more nonionic surfactants selected from the nonionic surfactants of
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, alkaline earth metals, ammonium and alkanolamine-derived ammonium, and (b2) salts of tris(hydroxymethyl)aminomethane, Fatty acid salt containing one or more fatty acid salts selected from aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine,
(F) water 5 to 40 mass%
and wherein the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.

<54> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) 1 or 2 or more selected from nonionic surfactants with HLB 6 to 8, (a2) 1 or 2 or more selected from nonionic surfactants with HLB greater than 13 and 18 or less and ( a3) a nonionic surfactant having an HLB of 6 to 18 when mixed, which contains a nonionic surfactant having an HLB of 8 or more and 13 or less having a branched alkyl group or two or more alkyl groups, 7 to 30% by mass;
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, alkaline earth metals, ammonium and alkanolamine-derived ammonium, and (b2) salts of tris(hydroxymethyl)aminomethane, Fatty acid salt containing one or two fatty acid salts selected from aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.1 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine,
(F) water 5 to 40 mass%
is blended, the content ratio (B) / (A) of component (B) to component (A) is 0.06 to 0.35, and the content of component (b1) to component (b2) of component (B) A method for producing a solubilized skin cleanser composition, wherein the molar ratio [(b1)/(b2)] is from 0.3 to 2.5.

<55> The following components (A), (B), (C), (D), (E) and (F):
(A) (a1) one or more nonionic surfactants having an HLB of 6 to 8 selected from diglyceryl isostearate, diglyceryl oleate and isostearyl glyceryl ether; (a2) alkyl having 8 to 18 carbon atoms; one or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters and alkyl glucosides having groups, and one selected from polyoxyethylene fatty acid esters and alkyl glucosides or two or more selected from nonionic surfactants having HLB greater than 13 and 18 or less and (a3) polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, poly HLB at the time of mixing, containing a nonionic surfactant with HLB greater than 8 and 13 or less having one or more branched alkyl groups or two or more alkyl groups selected from oxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters 7 to 30% by mass of a nonionic surfactant having a value of 6 to 18,
(B) (b1) one or more fatty acid salts whose salts are selected from alkali metals, ammonium and ammonium derived from alkanolamines, and (b2) salts from tris(hydroxymethyl)aminomethane and aminomethylpropanediol Fatty acid salt containing one or two selected fatty acid salts 0.1 to 4% by mass in terms of fatty acid,
(C) (c1) an oil agent having a viscosity of 15 mPa·s or less at 30°C and (c2) an oil agent containing a saturated or unsaturated branched alcohol having 15 or more carbon atoms, 5 to 20% by mass,
(D) 10 to 60% by mass of a water-soluble solvent having an IOB value of 1.5 to 6,
(E) 0.1 to 6% by mass of one or two bases selected from tris(hydroxymethyl)aminomethane and aminomethylpropanediol,
(F) water 5 to 40 mass%
is blended, the content ratio (B) / (A) of component (B) to component (A) is 0.06 to 0.35, and component (B) contains component (b1) to component (b2) The molar ratio [(b1)/(b2)] is 0.3 to 2.5, and the molar ratio of component (B) to component (E) [(B)/(E)] is 0.05. to 7, a method for producing a solubilized skin cleanser composition.

Examples 1-36, Comparative Examples 1-9
Solubilized skin cleansing compositions having the compositions shown in Tables 1 to 4 were produced, and the appearance immediately after, pH immediately after, temperature stability immediately after (solubilization temperature range), oily mascara solubility, rinsing speed, and rinsing. The bare skin feeling immediately after application and the temperature stability (solubilization temperature range) after long-term storage were evaluated. Also, for Examples 27 to 36, the level of pain when in contact with the eyes was evaluated. The results are also shown in Tables 1 to 4. In addition, all contents described in the table are effective amounts.
Moreover, Example 19 is a reference example.

The following raw materials were used as the annotated ingredients described in the table.
*1: Pearl Ream 4 (manufactured by NOF Corporation, viscosity 5.9 mPa s)
*2: Calcol 200GD (manufactured by Kao Corporation, viscosity 41.7 mPa s)
*3: Amisoft LA-D (manufactured by Ajinomoto Healthy Supply Co., Ltd.)
*4: Amisoft HA-P (manufactured by Ajinomoto Healthy Supply Co., Ltd.)
*5: Amisoft CK-22 (manufactured by Ajinomoto Healthy Supply Co., Ltd.)
*6: Amisoft MK-11 (manufactured by Ajinomoto Healthy Supply Co., Ltd.)
*7: Akipo LM-26SD (manufactured by Kao Corporation)
* 8: AG-10LK (manufactured by Kao Corporation, HLB17)
* 9: Emanone 1112 (manufactured by Kao Corporation, HLB 13.7)
* 10: Cosmol 41V (manufactured by Nisshin Oillio Group, HLB8)
* 11: Rhodol 430V (manufactured by Kao Corporation, HLB 10.5)

(Production method)
Step 1: Add components 23 to 25 and component 27 to component 29 and mix uniformly at 25° C. and 200 rpm.
Step 2: Ingredients 10-18 are added to the preparation of Step 1 and mixed uniformly at 25°C and 200 rpm.
Step 3: Components 1 to 9 are mixed and dissolved by heating at 80°C with stirring.
Step 4: Add the preparation of step 3 to the preparation of step 2 and cool to 30°C with stirring.
Step 5: Ingredients 19 to 22, 26 and 28 were added to the preparation of Step 4 and uniformly mixed at 200 rpm to obtain a solubilized skin cleanser composition.

(Evaluation method)
(1) Immediate appearance:
Immediately after production, 40 mL of each skin cleanser composition is placed in a 50 mL sample bottle (manufactured by Tokyo Glass Instruments Co., Ltd.: standard bottle #6) and visually observed to determine whether it is transparent, translucent, cloudy, separated, or precipitated. was evaluated.
At this time, for transparent, translucent, and opaque samples, the side of the sample bottle has a bar code with a width of 0.4 to 1.0 mm and a 2.0 mm square number in black. The printed board was placed and visually observed from the opposite side, and the appearance of the bar code and numbers was evaluated as follows.
"Transparent" means that the lines and numbers of the bar code can be clearly recognized.
"Semi-transparent" means that the lines of the bar code can be recognized, but the numbers cannot be recognized.
“Cloudy” means a state in which the barcode lines and numbers cannot be recognized.
In addition, when phase separation or precipitation of contents was observed in each skin cleanser composition, it was recognized as separation or precipitation, respectively.

(2) Immediate pH:
Immediately after production, the undiluted solution of each skin cleanser composition was measured at 30° C. with a pH meter (manufactured by Horiba Ltd.: desktop type pH/water quality analyzer LAQUA F-72T). At this time, the measurement is performed while gently stirring for 15 minutes until the value stabilizes, and the stable value after stirring is measured.

(3) Temperature stability immediately after (solubilization temperature range):
(3-1) Measurement of cloud point:
30 mL of each skin cleanser composition and a stirrer are placed in a 50 mL sample bottle (manufactured by Tokyo Glass Instruments Co., Ltd.: standard bottle #6) and heated in a 70° C. water bath until it becomes cloudy. It was then removed from the water bath. In an environment of 25° C., the sample bottle is cooled on a stirrer while stirring with a stirrer at 350 rpm. The cloud point was defined as the temperature at which the film became transparent or translucent.

(3-2) Measurement of solubilization limit point:
40 mL of each skin cleanser composition is placed in a 50 mL sample bottle (manufactured by Tokyo Glass Instruments Co., Ltd.: standard bottle #6) and stored in a constant temperature bath at 5°C, 0°C and -5°C for 12 hours. After that, the appearance at each temperature was visually observed to evaluate whether it was transparent, translucent, cloudy, separated into two layers, or precipitated. The lowest temperature at which a transparent to translucent appearance could be maintained was defined as the solubilization limit point.

(4) Solubility of oily mascara:
On a glass plate (MICRO SLIDE GLASS, manufactured by MATSUNAMI), 3 mg of waterproof mascara (Maybelline Magnum Volume Mascara Waterproof Type) is evenly applied in a circle with a diameter of 12 mm. After drying for 8 hours, 0.03 g of each skin cleanser composition is added dropwise and spread with a fingertip at a speed of drawing a circle once per second with a pressure of about 100 g. After applying the mascara 50 times, the degree of dissolution and remaining state of the mascara was observed and evaluated according to the following criteria.
(criterion)
5; The mascara was completely dissolved (no mascara remained on the glass plate).
4; Mascara was almost dissolved (10% or less mascara remained on the glass plate).
3; Mascara was partially dissolved (more than 10% to 50% or less of mascara remained on the glass plate).
2; mascara was slightly dissolved (more than 50% to 90% or less of mascara remained on the glass plate).
1; mascara hardly dissolves (more than 90% mascara remains on the glass plate)

(5) Rinsing speed:
Five expert panelists actually used each skin cleanser composition on their face and rinsed it off. As an evaluation index, a facial cleanser (manufactured by Kao Corporation: Bioré Skincare facial cleanser) was used. , evaluated the rinsing speed.
(Evaluation criteria)
5: All 5 out of 5 evaluated that rinsing was fast.
4; 4 out of 5 evaluated that rinsing was fast.
3: 3 out of 5 evaluated that rinsing was fast.
2; 2 out of 5 evaluated that rinsing was fast.
1: Less than 1 person out of 5 evaluated that rinsing was fast.

(6) Bare skin feel immediately after rinsing:
Five expert panelists actually used each skin cleanser composition on their face and rinsed it off. As an evaluation index, a facial cleanser (manufactured by Kao Co., Ltd.: Bioré Skincare) was used, and after rinsing (the skin was still wet before wiping with a towel), the skin felt tight (bare skin feeling). The bare skin feel immediately after rinsing was evaluated based on the number of people who evaluated it as equivalent to the facial cleanser.
(Evaluation criteria)
5: All 5 out of 5 people evaluated that they felt bare skin feeling.
4; 4 out of 5 people evaluated that they felt bare skin feeling.
3: 3 out of 5 people evaluated that they felt bare skin feeling.
2: 2 out of 5 people evaluated that they felt bare skin feeling.
1: 1 or less out of 5 people evaluated that they felt bare skin feeling.

(7) Temperature stability after long-term storage (solubilization temperature range):
The temperature stability after long-term storage was evaluated. Specifically, in order to accelerate deterioration, 180 mL of each skin cleanser composition was placed in a PET container (manufactured by Yoshino Kogyo Co., Ltd.: AL-CLO6A case 200M NB527C oil) and stored at 50°C for one month. The cloud point was measured in the same manner as in (3-1). As for the solubilization limit point, after similarly accelerating the deterioration, the solubilization limit point was measured in the same manner as in (3-2) above.

(8) Level of pain when in eyes:
Three expert panelists applied each skin cleanser composition mainly around the eyelashes and around the eyes for 20 seconds on the assumption that mascara was removed, and then opened the eyes and blinked ten times. The pain level was assessed. 4 points for almost no pain, 3 points for very weak pain, 2 points for slightly weak pain, and 1 point for weak pain. evaluated as When using a facial cleanser (manufactured by Kao Corporation: Bioré Skincare facial cleanser), a very strong pain was felt.

Claims (9)

The following components (A), (B), (C), (D), (E) and (F):
(A) 7 to 30% by mass of nonionic surfactant with HLB 6 to 18,
(B) Fatty acid salt 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.41 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;
(F) water 5 to 40 mass%
and wherein the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35. 2. The solubilized skin cleanser composition according to claim 1, wherein component (C) contains (c1) an oil having a viscosity of 15 mPa.s or less at 30.degree. 3. The solubilized skin cleanser composition according to claim 1, wherein component (C) contains (c2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms. Component (A) comprises (a1) a nonionic surfactant with HLB 6 to 8, (a2) a nonionic surfactant with HLB greater than 13 and 18 or less, and (a3) a branched alkyl group or from HLB8 having two or more alkyl groups. 4. The solubilized skin cleanser composition according to any one of claims 1 to 3, which comprises two or more nonionic surfactants selected from 13 or less nonionic surfactants. The solubilized skin cleanser composition according to any one of claims 1 to 4, wherein the molar ratio [(B)/(E)] of component (B) to component (E) is 7 or less. Component (B) comprises (b1) a fatty acid salt whose salt is selected from potassium and sodium and (b2) a fatty acid salt whose salt is selected from tris(hydroxymethyl)aminomethane and aminomethylpropanediol, and component (b2) 6. The solubilized skin cleanser composition according to any one of claims 1 to 5, wherein the content mass ratio of component (b1) to [(b1)/(b2)] is 0.3 to 2.5. The solubilized skin cleanser composition according to any one of claims 1 to 6, which has a pH of 7 to 11 at 30°C. The solubilized skin cleanser composition according to any one of claims 1 to 7, wherein component (A) is a fatty acid ester. The following components (A), (B), (C), (D), (E) and (F):
(A) 7 to 30% by mass of nonionic surfactant with HLB 6 to 18,
(B) Fatty acid salt 0.1 to 4% by mass in terms of fatty acid,
(C) Oil agent 5 to 20% by mass,
(D) water-soluble solvent 10 to 60 mass%,
(E) 0.41 to 6% by mass of a base selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;
(F) water 5 to 40 mass%
and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.