TWI808194B - Soluble skin cleanser composition - Google Patents

Abstract

A solubilizing skin cleansing agent composition, which contains the following components (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; Alkanes, aminomethyl propanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine bases 0.1 to 6% by mass; (F) water 5 to 40% by mass; the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.

Description

Soluble skin cleanser composition

This invention relates to solubilized skin cleanser compositions.

It is known that the solid oil components contained in the difficult-to-remove make-up dirt such as waterproof mascara are removed by dissolving the oil agent. Therefore, cleansing materials using oil agents as cleansing ingredients have been marketed in various formulations such as creams, gels, and liquids (liquids).

These formulations are usually prepared by properly combining nonionic surfactants for flushing off oils that dissolve soils. However, preparations simply combining an oil agent and a nonionic surfactant have a problem of being greasy at the time of rinsing or the residue of the oil agent after rinsing off. Therefore, after removing makeup, many consumers further cleanse with cleansing materials such as pigments.

For example, Patent Document 1 describes that a makeup remover composition containing a nonionic surfactant of a specific HLB, a low-viscosity oil agent, and a water-soluble solvent has superior makeup cleaning power and can be washed off cleanly. However, although this cleansing composition can be washed off without being greasy, it cannot give the refreshing feeling of thoroughly cleansed skin as if the skin is washed by washing the pigment.

In addition, a review has been made of a cleansing composition (Patent Documents 2 and 3) in which an anionic surfactant is combined with a nonionic surfactant, an oil agent, and a polyol. Here, the anionic surfactant is used to improve the rinse performance of the composition, but it still cannot give the skin after washing a feeling of thoroughly cleansed skin.

Furthermore, Patent Document 4 describes a cleansing composition that combines an anionic surfactant, a silicone-based nonionic surfactant, and silicone oil to provide a refreshing feeling. However, when anionic surfactants and nonionic surfactants are used together, from the viewpoint of long-term stability, the surfactants that can be selected are limited, and it is impossible to obtain a composition that gives a feeling of thorough cleansing like facial cleansing while maintaining sufficient stability.

(Patent Document 1) Japanese Patent Laid-Open No. 2008-184415

(Patent Document 2) Japanese Patent Laid-Open No. 2013-1698

(Patent Document 3) Japanese Patent Application Laid-Open No. 9-175936

(Patent Document 4) Japanese Patent Laid-Open No. 2000-336014

The present invention relates to a solubilized skin cleanser composition, which contains the following components (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; ) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine base 0.1-6% by mass; (F) water 5-40% by mass; component (B) relative to component (A) content ratio (B)/(A) is 0.06-0.35.

The present invention is soluble by combining an oil agent with a non-ionic surfactant with moderate HLB and an appropriate amount of fatty acid salt. When applied to the skin, the oil agent has the cleansing power and can dissolve waterproof mascara and other difficult-to-remove make-up. Also, the purpose is to obtain a cleansing agent composition that can be washed off quickly without being greasy, and leaves a thoroughly cleansed skin feeling on the skin due to the formation of a scum of fatty acid salts, and can actually feel the skin feeling of washing by washing the pigment.

Also, when a nonionic surfactant and a fatty acid salt are combined, since the pH becomes alkaline, fatty acids are generated due to hydrolysis of the nonionic surfactant during long-term storage, and become fatty acids and fall into a state where the degree of neutralization is lowered, and at the same time, the problem of precipitation at low temperatures is solved.

The inventors of this case discovered that by containing specific nonionic surfactant, fatty acid salt, oil agent, water-soluble solvent, specific alkali and water, and using specific nonionic surfactant and fatty acid salt in combination in a specific ratio, a soluble skin cleanser composition with superior long-term storage stability, high detergency, non-greasy and fast rinsing when rinsed off, and a refreshing touch to the skin after washing was obtained.

The solubilized skin cleanser composition of the present invention has high cleansing power, and at the same time, it is not greasy when washed off and can be washed quickly. It can give the skin after washing a refreshing feeling as if it is washed by washing pigments, and it has excellent long-term storage stability. Also, the irritation to the eyes is also improved.

In the present invention, solubilization refers to a thermodynamically stable liquid phase in which the oil agent and the water phase components dissolve each other due to the surfactant, which shows a transparent to translucent appearance.

In the solubilized skin cleanser composition of the present invention, a nonionic surfactant and an anionic surfactant are mainly used in combination to form a solubilization system. However, since the HL (hydrophilicity-hydrophobic) balance of the nonionic surfactant changes with temperature, in the solubilized composition, a cloud point appears at a high temperature, and a solubilization limit point appears at a low temperature side. The region between the cloud point and the solubilization limit point is called the solubilization temperature region, and the expansion of this temperature region will cause the expansion of the stable temperature region of the solubilized composition generated, and at the same time increase the solubilization amount of the oil dose.

As a soluble product, it is important that the appearance does not change in the actual use temperature range. In order to withstand the use in real life, it is better to keep the soluble state in the temperature range of 0℃~40℃. Furthermore, if the storage conditions are also taken into consideration, it is more preferable to maintain the soluble state within the range of -5°C to 50°C.

The nonionic surfactant of component (A) used in the present invention is a nonionic surfactant with an HLB of 6-18. The nonionic surfactant of the component (A) plays a role of solubilizing the oil agent belonging to the component (C) together with the fatty acid salt of the component (B).

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) must be adjusted to an HLB suitable for solubilization under the coexistence of component (B). From the viewpoint of expanding the solubilization temperature range, it is preferably HLB7~12.5, more preferably HLB8~12.3, and even more preferably HLB9~12.0.

Also, from the viewpoint of being a cleanser milder to the skin, fatty acid esters are preferred, and at least one selected from the group consisting of glycerin fatty acid esters, polyglycerin fatty acid esters, polyoxyethylene glycerin fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene sorbitan fatty acid esters is more preferred.

The nonionic surfactant of component (A) can be used alone or in combination of two or more. When combining two or more nonionic surfactants, the HLB at the time of mixing must be within the above range.

The HLB at the time of mixing two or more types of nonionic surfactants is obtained by adding and averaging the HLB values of the respective nonionic surfactants based on the mixing ratio thereof, and is obtained as follows. HLB at the time of mixing of 2 or more types of nonionic surfactants is made into the range of said HLB.

HLB=Σ(HLBx×Wx)/ΣWx when mixing

HLBx represents the HLB value of the nonionic surfactant X.

Wx represents the mass (g) of the nonionic surfactant X which has HLBx value.

In addition, the nonionic surfactant of component (A) is from the viewpoint of increasing the solubilization amount of the oil agent and expanding the solubilization temperature range. It is preferable to use a mixture of two or more nonionic surfactants with different HLBs. It is more preferable to use a nonionic surfactant selected from (a1) a nonionic surfactant with an HLB of 6 to 8, (a2) a nonionic surfactant with an HLB of greater than 13 and less than 18, and (a3) a branched alkyl group or two or more alkyl groups with an HLB of greater than 8 and Two or more nonionic surfactants of 13 or less nonionic surfactants; more preferably one or more nonionic surfactants selected from (a1) nonionic surfactants with HLB6-8 and (a2) nonionic surfactants with HLB greater than 13 and less than 18, and (a3) nonionic surfactants with branched alkyl groups or two or more alkyl groups with HLB greater than 8 and less than 13; One or more types of components (a2) and one or more types selected from components (a3).

Examples of nonionic surfactants of (a1) HLB6-8 include polyglyceryl fatty acid esters such as diglyceryl oleate and diglyceryl isostearate; polyglyceryl alkyl ethers such as diglycerin 2-ethylhexyl ether and isostearyl glyceryl ether; polyethylene glycol fatty acid esters such as polyethylene glycol (5) monostearate.

Among them, from the viewpoint of expanding the melting temperature range, it is preferable to contain one or more kinds selected from diglyceryl isostearate, diglyceryl oleate, and isostearyl glyceryl ether, more preferably to contain one or two kinds selected from diglyceryl isostearate and diglyceryl oleate, and even more preferably to contain diglyceryl isostearate.

Examples of the (a2) nonionic surfactant having an HLB of 13 to 18 include polyoxyethylene-based surfactants such as polyoxyethylene fatty acid esters such as polyoxyethylene (12) monolaurate, polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene (20) sorbitan monostearate, and polyoxyethylene glycerin fatty acid esters such as polyoxyethylene (20) glycerol monostearate; sucrose fatty acid esters such as sucrose stearate; alkyl groups such as decyl glucoside. Polyglucoside, etc.

Among them, from the viewpoint of expanding the melting temperature range, it is preferable to contain one or two or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, more preferably to contain one or two or more types selected from polyoxyethylene fatty acid esters and alkyl glucosides, and even more preferably to contain one or two types selected from polyoxyethylene (12) monolaurate and decyl glucosides.

(a3) Among nonionic surfactants having a branched alkyl group or two or more alkyl groups whose HLB is greater than 8 and not more than 13, the branched alkyl group is preferably one with 8 to 18 carbon atoms, such as octyldodecyl, hexyldecyl, and isostearyl. Also, the alkyl group is preferably one having 8 to 18 carbon atoms.

Specific examples include polyoxyethylene fatty acid esters such as polyoxyethylene (12) monoisostearate, polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene (20) sorbitan trioleate, polyoxyethylene sorbitan fatty acid esters such as tetraoleic acid polyoxyethylene (30) sorbitol, polyoxyethylene alkyl ethers such as polyoxyethylene (20) octyl dodecyl ether, and polyoxyethylene hardened castor oil derivatives such as polyoxyethylene (60) hardened castor oil monoisolaurate. , polyoxyethylene glyceryl fatty acid esters such as polyoxyethylene (8) glyceryl monoisostearate, etc.

Among them, it is preferable to contain one or more kinds selected from polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether and polyoxyethylene glycerin fatty acid ester, more preferably to contain one or more kinds selected from polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester and polyoxyethylene glycerin fatty acid ester, and more preferably to contain polyoxyethylene (12) monoisostearate, tetraoleic acid polyoxyethylene One or more of ethylene (30) sorbitol, polyoxyethylene (20) sorbitan trioleate, and polyoxyethylene (8) glyceryl monoisostearate.

When component (A) contains one or two or more selected from component (a1) and component (a2) and component (a3), the content ratio [((a1)+(a2))/(a3)] of the sum of component (a1) and component (a2) to component (a3) is preferably 3.0 or more, more preferably 4.5 or more, still more preferably 5.0 or more, preferably 10 or less, more preferably 9 Below, more preferably below 8.

Also, when component (a1) and component (a2) are contained in component (A), the content ratio [(a1)/(a2)] of component (a1) to component (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 still more preferably 1.6 or less from the viewpoint of expanding the melting temperature range.

The content of component (A) in the dissolvable skin cleanser composition is at least 7% by mass, preferably at least 10% by mass, more preferably at least 12% by mass, more preferably at least 14% by mass, and less than 30% by mass, preferably less than 25% by mass, more preferably less than 20% by mass, and more preferably less than 18% by mass, in the total composition from the viewpoint of maintaining the solubility of the oily mascara while expanding the melting temperature range. Moreover, the content of component (A) is 7-30 mass % in the total composition, Preferably it is 10-25 mass %, More preferably, it is 12-20 mass %, More preferably, it is 14-18 mass %.

The fatty acid salt of the component (B) has the action of solubilizing the component (C) together with the component (A). Furthermore, by improving the rinsing speed and giving a thoroughly cleansed touch to the skin after rinsing, it also has the effect of emphasizing the feeling of bare skin.

As the fatty acid salt of component (B), it is preferably represented by the general formula (1): R ¹ -COOM ¹ ...(1)

(In the formula, ^R represents a linear or branched alkyl or alkenyl group with 9 to 21 carbons, and ^M represents an alkali metal, an alkaline earth metal, ammonium, ammonium derived from alkanolamine, ginseng (hydroxymethyl)aminomethane, aminomethyl propanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine).

Also, from the standpoint of maintaining low-temperature stability after long-term storage, rinsing speed, and improving the bare skin feeling immediately after rinsing, the carbon number of ^R1 is more preferably 10-20, and more preferably 12-18.

More specifically, for example, the fatty acid portion is a fatty acid salt of one or more kinds selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, and behenic acid. Among them, from the viewpoint of expanding the melting temperature range, rinsing speed, and improving the feeling of bare skin immediately after rinsing, it is preferable that the fatty acid portion is one or more fatty acid salts selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and oleic acid; Fatty acid salts of three or more types of myristic acid, palmitic acid, stearic acid and isostearic acid, and more preferably fatty acid salts containing lauric acid, myristic acid, palmitic acid, stearic acid and isostearic acid in the fatty acid moiety.

Examples of salts of fatty acid salts include alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine;

The fatty acid salt of the component (B) is present in the composition, for example, by mixing with unneutralized fatty acid and a neutralizing agent to form a fatty acid salt.

Neutralizers are basic compounds, such as sodium hydroxide, potassium hydroxide, triethanolamine, ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, ornithine, etc.

In general, anionic surfactants are highly irritating when they enter the eyes. On the other hand, when removing make-up, since it is easy to get into the eyes due to careful blending to remove the make-up around the eyes, the make-up cannot be fully removed if pain occurs when it gets into the eyes. Since the solubilized composition of the present invention contains the anionic surfactant of the component (B), it is required not to cause severe pain to the eyes. In addition, it is also required to maintain the rinsing speed or the bare skin feeling immediately after rinsing. From these viewpoints, it is preferable to include (b1) salts selected from alkali metals, alkaline earth metals, ammonium, and ammonium fatty acid salts derived from alkanolamines, and (b2) salts selected from ginseng(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; Fatty acid salts of methane, aminomethylpropanol, aminomethylpropanediol and arginine; more preferably, (b1) salt is a fatty acid salt selected from potassium and sodium, and (b2) salt is a fatty acid salt selected from ginseng (hydroxymethyl)aminomethane and aminomethylpropanediol; more preferably, it contains (b1) fatty acid potassium salt and (b2) fatty acid ginseng (hydroxymethyl)aminomethane salt.

The content molar ratio [(b1)/(b2)] of component (b1) to component (b2) is preferably 0.3 or more, more preferably 0.4 or more, still more preferably 0.5 or more, preferably 2.5 or less, more preferably 2.0 or less, still more preferably 1.5 or less, from the viewpoint of maintaining the washing speed and reducing the pain when it enters the eyes.

The fatty acid conversion content of component (B) in the total composition is at least 0.1% by mass, preferably at least 0.6% by mass, more preferably at least 0.9% by mass from the viewpoint of improving the smoothness disappearing speed during rinsing and making the bare skin feel good after rinsing; from the viewpoint of maintaining low temperature stability, it is not more than 4% by mass, preferably not more than 3% by mass, more preferably not more than 2% by mass. Moreover, content of a component (B) is 0.1-4 mass % in the total composition, Preferably it is 0.6-3 mass %, More preferably, it is 0.9-2 mass %.

Here, the content in terms of fatty acid refers to the fatty acid converted to the corresponding fatty acid salt content (for example, in the case of the potassium salt of stearic acid, the corresponding fatty acid is stearic acid).

In the present invention, the content ratio [(B)/(A)] of component (B) to component (A) is 0.060 or more, preferably 0.065 or more, more preferably 0.070 or more, and 0.35 or less, preferably 0.27 or less, more preferably 0.26 or less, and more preferably 0.25 or less from the viewpoint of expanding the melting temperature range. Moreover, content of a component (B) is a fatty acid conversion value. Moreover, the content ratio [(B)/(A)] of a component (B) with respect to a component (A) is 0.06-0.35, Preferably it is 0.065-0.27, More preferably, it is 0.07-0.26, More preferably, it is 0.07-0.25.

In addition, content of a component (B) uses the content in conversion of the said fatty acid.

The oil agent of component (C) has the function of dissolving or dispersing the makeup. As the oil agent of the component (C), any one can be used as long as it is used in a usual detergent composition.

As such an oil agent, liquid oils commonly used in cosmetics can be used, such as hydrocarbon oils such as isododecane, isohexadecane, mobile alkane, mobile isoalkane, hydrogenated polyisobutylene, squalane, etc.; Ester oils of isotridecyl ester, tri(2-ethylhexanoic acid) glycerin, tri(caprylic‧capric acid) glycerin, etc.; ether oils of dilauryl ether, dioctyl ether, cetyl-1,3-dimethylbutyl ether, nonylphenyl ether, etc.; dimethylcyclopolysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, etc.; Polysiloxane oils such as oxane; alcohols such as isostearyl alcohol, hexyldecanol, octyldodecanol, etc., animal and vegetable oils such as olive oil; terpene oils, etc. These can be used 1 type or in combination of 2 or more types.

The oil agent of component (C) is preferably an oil agent containing (c1) with a viscosity at 30°C of 15 mPa‧s or less, more preferably 12 mPa‧s or less, and even more preferably 10 mPa‧s or less from the viewpoint of exhibiting higher solubility of oily mascara and making the bare skin feel good immediately after rinsing. .

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) was used to measure the viscosity at 30°C.

Component (c1) preferably contains one or two or more selected from hydrocarbon oils, ether oils, and polysiloxane oils, more preferably contains one or more types selected from hydrocarbon oils and ether oils, and still more preferably contains at least hydrocarbon oils, from the viewpoint of maintaining a wide melting temperature range, long-term storage stability, and good solubility of oil-based mascara.

The hydrocarbon oil preferably contains one or two or more selected from mobile isoalkane, isododecane, and isohexadecane, and more preferably contains one or two or more selected from isododecane and isohexadecane from the above viewpoint.

The ether oil preferably contains one or two or more selected from dilauryl ether, dioctyl ether, and cetyl-1,3-dimethylbutyl ether from the above viewpoint.

As polysiloxane oil, from the above point of view, it is preferable to contain one or more of dimethylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, ginseng(trimethylsilyl)methylsilane, tetrakis(trimethylsilyl)silane, and methylphenylpolysiloxane with an automatic viscosity (manufacturer’s catalog value) of 1.5~10mm ^{2 /} s; One or more of cyclotetrasiloxane, decamethylcyclopentasiloxane, and ginseng(trimethylsilyl)methylsilane.

The content mass ratio [(c1)/(C)] of component (c1) in component (C) is from the viewpoint of improving the solubility of oil-based mascara and increasing the speed of slippery disappearance during rinsing.

Also, the oil agent of the component (C) preferably contains (c2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms in order to expand the melting temperature range. From the viewpoint of expanding the solubilization temperature region, 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, more preferably 18 or more, preferably 22 or less, more preferably 21 or less, and more preferably 20 or less. Also, from the viewpoint of improving long-term storage stability, it is preferable to contain a saturated branched alcohol, and it is more preferable to contain a saturated branched monohydric alcohol.

Specifically, as a saturated or unsaturated branched alcohol having 15 or more carbon atoms, from the viewpoint of expanding the melting temperature range and improving long-term storage stability, it is preferable to contain one or two or more selected from hexyldecyl alcohol, isostearyl alcohol, and octyldodecanol, more preferably to contain one or two types selected from isostearyl alcohol and octyldodecanol, and even more preferably to contain isostearyl alcohol.

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 more preferably 0.07 or more, and is preferably 0.30 or less, more preferably 0.25 or less, and more preferably 0.22 or less from the viewpoint of improving the bare skin feeling immediately after rinsing and expanding the melting temperature range.

The content of component (C) in the skin cleansing composition is 5% by mass or more, preferably 7% by mass or more, more preferably 9% by mass or more, and more preferably 10% by mass or more in the total composition from the viewpoint of improving the solubility of the oil-based mascara. In order to maintain long-term storage stability, it is 20% by mass or less, preferably 16% by mass or less, more preferably 14% by mass or less, more preferably 12% by mass or less. Moreover, content of component (C) is 5-20 mass % in the total composition, Preferably it is 7-16 mass %, More preferably, it is 9-14 mass %, More preferably, it is 10-12 mass %.

The water-soluble solvent of component (D) has the function of forming a water phase with the water of component (F), and adjusting the HL balance by controlling the solubility of the surfactant in the water phase. On the other hand, it is also responsible for suppressing the dryness of the skin after use.

Component (D) is not limited as long as it is used in common cosmetics. Preferably it contains a water-soluble solvent with an IOB value of 1.5-6.0, more preferably a water-soluble solvent with an IOB value of 1.6-4.0. As the water-soluble solvent, it is preferable to use one or two or more kinds selected from monohydric alcohols and polyhydric alcohols from the viewpoint of good compatibility with component (F) and suppression of dryness on the skin after use.

Here, the IOB value is an abbreviation of Inorganic/Organic Balance (inorganic/organic balance), is a value showing the ratio of the inorganic value to the organic value, and serves as an index showing the degree of polarity of the organic compound. Specifically, it is expressed as IOB value=inorganic value/organic value. Regarding each of the "inorganic value" and "organic value", for example, set the "organic value" to 20 for one carbon atom in the molecule, and similarly set the "inorganic value" to 100 for one hydroxyl group, and set the "inorganic value" and "organic value" in accordance with each atom or functional group. Organic Concept Map-Basic and Application-" p11~17, Sankyo Publishing, issued in 1984).

Examples of the component (D) include monohydric alcohols such as ethanol, propanol, isopropanol, butanol, and isobutanol; glycols such as ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, hexanediol, and isopentyl glycol; glycerols such as glycerin and diglycerin; Polyols such as sugars, methyl glucoside, ethyl glucoside and other sugar derivatives.

Among these, from the viewpoint of maintaining a wide melting temperature range and making long-term storage stability good, it is preferably selected from ethanol (IOB: 2.5), propylene glycol (IOB: 3.3), dipropylene glycol (IBO: 1.8), 1,3-butanediol (IOB: 2.5), isopentyl glycol (IOB: 2.2), glycerin (IOB: 5.0), diglycerol (IOB: 3.5), butyritol (IOB: 5 .0) and maltitol (IOB: 4.4), more preferably one or more of ethanol, propylene glycol, dipropylene glycol, 1,3-butanediol, isopentyl glycol, and diglycerin, and more preferably one or more of ethanol, propylene glycol, dipropylene glycol, 1,3-butanediol, and isopentyl glycol.

The content of component (D) in the skin cleanser composition is at least 10% by mass, preferably at least 20% by mass, more preferably at least 30% by mass, still more preferably at least 35% by mass, and less than 60% by mass, preferably less than 55% by mass, more preferably less than 50% by mass, more preferably less than 45% by mass, in the total composition from the viewpoint of expanding the melting temperature range and suppressing stickiness after washing. Moreover, the content of component (D) is 10-60 mass % in the total composition, Preferably it is 20-55 mass %, More preferably, it is 30-50 mass %, More preferably, it is 35-45 mass %.

The content ratio [(D)/(F)] of component (D) to component (F) is preferably at least 0.5, more preferably at least 1.0, more preferably at least 1.2, and is preferably at most 4.0, more preferably at most 2.0, and more preferably at most 1.8, from the viewpoint of expanding the melting temperature range and suppressing stickiness after rinsing. Moreover, the content ratio [(D)/(F)] of a component (D) with respect to a component (F) becomes like this. Preferably it is 0.5-4.0, More preferably, it is 1.0-2.0, More preferably, it is 1.2-1.8.

Component (E) is a base selected from the group consisting of (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine.

These bases are not in the form of salts (it is not necessary to form salts such as fatty acid salts with acidic components such as fatty acids), but are formulated to exist in the composition in free form.

The pH of the solubilized skin cleansing composition of the present invention is alkaline because it contains fatty acid salt. However, under long-term storage under the coexistence of moisture, the non-ionic surfactant is prone to hydrolysis to generate free fatty acids, and the pH of the system gradually decreases. The change also affects the degree of neutralization of fatty acids, and unneutralized fatty acids are easy to precipitate at low temperatures. In the present invention, redissolution is promoted by neutralizing free fatty acid generated during long-term storage in the presence of water by further coexisting component (E) in the solubilized skin cleansing composition.

Furthermore, in the fatty acid salt of component (B), when the salt of (b2) is a fatty acid salt selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, and when the neutralizing agent for forming the fatty acid salt of (b2) formulated in the composition is the same substance as component (E), the component (E ).

Specifically, in the fatty acid salt of the component (B), when the fatty acid is neutralized only by (b2), the amount formulated exceeds 1 neutralization equivalent as the component (E).

Furthermore, when anionic surfactants (G) other than component (B) are used in combination, the unneutralized components in component (G) are separately calculated to be 1 neutralization equivalent, and the amount to be 1 neutralization equivalent is calculated from the total of components (B) and (G). The amount compounded exceeding 1 neutralization equivalent of the sum total of a component (B) and a component (G) is made into a component (B).

Also, when (b1) and (b2) are used together, the neutralization of (b1) is given priority, and when the neutralization equivalent of (b1) is less than 1, the compounding amount of component (b2) is calculated as (1 neutralization equivalent - component (b1) neutralization equivalent) and is regarded as component (B). The remaining component (b2) exceeding 1 neutralization equivalent is the component (E).

The base of component (E) preferably contains one or more kinds selected from ginseng(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine, more preferably contains one or two kinds selected from ginseng(hydroxymethyl)aminomethane, aminomethylpropanol and aminomethylpropanediol, and is still more preferably selected from the group consisting of ginseng(hydroxymethyl)aminomethane and aminomethylpropanediol from the viewpoint of expanding the melting temperature range and improving long-term storage stability. One or two, and more preferably, ginseng (hydroxymethyl)aminomethane.

In the present invention, the content molar ratio [(B)/(E)] of component (B) relative to component (E) is preferably 7 or less, more preferably 5 or less, still more preferably 3 or less, and more preferably 1.5 or less, and is preferably 0.05 or more, more preferably 0.2 or more, and still more preferably 0.3 or more from the viewpoint of maintaining long-term low-temperature stability and improving the washing speed. Moreover, the content molar ratio [(B)/(E)] of component (B) to component (E) is preferably 0.05-7, more preferably 0.2-5, still more preferably 0.3-3, still more preferably 0.3-1.5.

In addition, the molar amount of the component (B) is the molar amount calculated in terms of fatty acid, and shows what was calculated as the fatty acid in conversion to the mole of the fatty acid salt.

The content of component (E) in the dissolvable skin cleanser composition is at least 0.1% by mass, preferably at least 0.5% by mass, more preferably at least 0.8% by mass, and is at most 6% by mass, preferably at most 4% by mass, more preferably at most 3.5% by mass, from the viewpoint of maintaining long-term low-temperature stability and improving the rinsing speed. Moreover, content of a component (E) is 0.1-6 mass % in the total composition, Preferably it is 0.5-4 mass %, More preferably, it is 0.8-3.5 mass %.

The water content of component (F) is at least 5% by mass, preferably at least 10% by mass, more preferably at least 15% by mass, and not more than 40% by mass, preferably not more than 35% by mass, more preferably not more than 30% by mass, in the dissolving skin cleanser composition from the viewpoint of maintaining sufficient detersive power and being able to completely wash off during rinsing. The content of the water of component (F) is 5-40 mass % in the total composition, Preferably it is 10-35 mass %, More preferably, it is 15-30 mass %.

The solubilized skin cleansing composition of the present invention may further contain (G) an anionic surfactant other than component (B) from the viewpoint of suppressing dryness during rinsing and further improving low-temperature stability.

Component (G) may be used in common skin cleansers, such as alkylbenzenesulfonate, alkanesulfonate, alkenylsulfonate, alkylsulfonate, acyl-2-isethionate, alkylsulfate, alkylether sulfate, alkylsulfosuccinate, sulfonate fatty acid methyl ester, fatty acid alkanolamide sulfate, monoacylglycerol sulfate, alkyl phosphate, polyoxyethylene alkyl ether phosphate, alkyl aryl ether phosphate, fatty acid amide ether Phosphoric acid, ether carboxylic acid or its salt, N-acyl amino acid salt, etc.

Among them, from the viewpoint of suppressing the dry feeling caused by the skin feeling of thorough cleansing caused by the floating film of fatty acids, making the bare skin feel good immediately after rinsing, increasing the rinsing speed, and suppressing precipitation at low temperature, it is preferable to contain one or more kinds selected from alkyl sulfate ester salts, alkyl ether sulfate ester salts, ether carboxylates, and N-acylglutamic acid salts, more preferably to contain one or more kinds selected from alkyl ether sulfate ester salts and ether carboxylates, and even more preferably to contain one kind selected from ether carboxylates. or 2 or more.

Examples of the alkyl ether sulfates include alkyl ether sulfates represented by the following general formula (2).

R ² O(CH ₂ CH ₂ O) _n SO ₃ M ² ‧‧‧(2)

(In formula ( ² ), R represents an aliphatic hydrocarbon group with 8 to 22 carbons; ^M represents a cation selected from alkali metals, alkaline earth metals, ammonium, alkyl ammonium, alkanolammonium and ammonium glucosinolate; n represents the average number of moles added, which is 0.5 to 20)

In the general formula (2), ^R2 is preferably an aliphatic hydrocarbon group with 8 to 16 carbons, more preferably an aliphatic hydrocarbon with 8 to 14 carbons, and even more preferably an aliphatic hydrocarbon with 10 to 14 carbons, from the viewpoint of good low temperature stability.

From the same viewpoint as above, n is preferably 0.5 or more, and is preferably 12 or less, more preferably 5 or less, still more preferably 4 or less, still more preferably 2 or less. The specific range of n is preferably 0.5-12, more preferably 0.5-5, more preferably 0.5-4, and more preferably 0.5-2.

From the same viewpoint as above, M ² is preferably an alkali metal or ammonium, more preferably an alkali metal, and even more preferably a sodium salt.

Specific examples of such alkyl ether sulfates include one or more selected from 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 them, it is preferable to contain one or more kinds selected from polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, and polyoxyethylene (2) sodium lauryl ether sulfate. In addition, in this specification, the numerical value in parentheses of these compounds means the average added mole number of ethylene oxide.

Moreover, examples of such commercially available alkyl ether sulfate salts include EMAL 125HP (manufactured by Kao Corporation, polyoxyethylene (1) sodium lauryl ether sulfate), EMAL 125A (manufactured by Kao Corporation, polyoxyethylene (1) ammonium lauryl ether sulfate), EMAL 227 (manufactured by Kao Corporation, polyoxyethylene (2) sodium lauryl ether sulfate), and the like.

As ether carboxylic acid or its salt, ether carboxylic acid or its salt represented by following general formula (3), for example is mentioned.

R ³ O(CH ₂ CH ₂ O) _m CH ₂ COOM ³ ‧‧‧(3)

(In formula (3), ^R3 represents an alkyl or alkenyl group with 10-22 carbons; m represents the average added mole number, a value of 0.5-10; ^M3 represents a hydrogen atom, alkali metal, alkaline earth metal, ammonium or organic ammonium)

In the general formula (3), R ³ is preferably an alkyl group having 12 to 14 carbons from the viewpoint of low temperature stability.

Furthermore, from the same viewpoint as above, the average addition mole number m of ethylene oxide is preferably 2-5.

^M3 can be, for example: hydrogen atoms; alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; ammonium derived from basic amino acids such as arginine and lysine. Among them, from the same viewpoint as above, one or more kinds are preferably selected from sodium, potassium, triethanolamine, and arginine, and more preferably one or two kinds are selected from sodium and potassium.

As such ether carboxylic acid or its salt, from the same viewpoint as above, specifically, it is preferable to contain one or two or more kinds selected from polyoxyethylene lauryl ether carboxylic acid or its salt, polyoxyethylene myristyl ether carboxylic acid or its salt, and polyoxyethylene palmityl ether carboxylic acid or its salt;

Moreover, as a commercial item of such ether carboxylic acid or its salt, AKYPO RLM 45CA (made by Kao Corporation), AKYPO LM 26C (made by Kao Corporation), etc. are mentioned, for example.

When component (B) and component (G) are used together, the content ratio [(B)/((B)+(G))] of component (B) to the total amount of component (B) and component (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 more preferably 0.7 or less, from the viewpoint of maintaining the rinsing speed, improving the bare skin feeling immediately after rinsing, and improving low-temperature stability. Moreover, content of a component (B) and a component (G) is made into an acid conversion value.

When component (B) and component (G) are used together, from the viewpoint of maintaining the rinsing speed, making the bare skin feel good immediately after rinsing, and improving low-temperature stability, the content ratio [((B)+(G)/(A)] of the total amount of component (B) and component (G) to component (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 more preferably 0.70 or less. 45 or less. Moreover, content of a component (B) and a component (G) is an acid conversion value.

The solubilized skin cleansing 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. Also, from the viewpoint of improving the anticorrosion performance, one or more kinds selected from the group consisting of hydroxycarboxylic acids and dicarboxylic acids are preferred, and one or more kinds selected from dicarboxylic acids are more preferred. Specific examples of hydroxycarboxylic acids include glycolic acid, lactic acid, glyceric acid, gluconic acid, pantothenic acid, and citric acid. Specific examples of the dicarboxylic acid include malic acid, oxalic acid, malonic acid, maleic acid, succinic acid, glutaric acid, adipic acid and the like.

The content of component (H) in the dissolvable skin cleanser composition can be appropriately contained for the purpose of adjusting the pH to the range described below, but from the viewpoint of long-term storage stability and a good feeling of bare skin immediately after rinsing, it is preferably 0.3% by mass or less, more preferably 0.01 to 0.2% by mass in the dissolvable skin cleanser composition.

The solubilized skin cleanser composition of the present invention may further contain components commonly used in cleansers, such as surfactants other than the above-mentioned components (A), (B) and (G), moisturizers other than component (D), oily components other than component (C), bactericides, anti-inflammatory agents, preservatives, chimeric agents, thickeners, scrubs, fragrances, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts, etc.

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

The solubilized skin cleanser composition of the present invention is related to the production method of the solubilized skin cleanser composition, which comprises the following components (A), (B), (C), (D), (E) and (F): (A) HLB6~18 nonionic surfactant 7~30% by mass; (B) fatty acid salt in conversion of fatty acid 0.1~4% by mass; (C) oil agent 5~20% by mass; (D) water-soluble solvent 10~60% % by mass; (E) 0.1 to 6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; (F) 5 to 40% by mass of water; the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35.

The solubilized skin cleanser composition is produced by mixing and formulating ingredients by a usual method. As a specific production method, it may also include, for example: step 1 of adding component (A), component (D), component (E), component (F), optional component (H), component (G) and other water-soluble components and mixing under arbitrary heating; step 2 of adding component (B), component (C) and optional other oil-soluble components and mixing under arbitrary heating; and step 3 of adding the preparation of step 1 to the preparation of step 1 and mixing.

Also, from the viewpoint of reducing foaming during mixing, it is preferable to include step 4 of adding a part of component (A) in step 1, adding the remaining part of component (A) to the preparation of step 3 and mixing; it may also include step 4 of adding the entire amount of component (A) to the preparation of step 3 without adding component (A) in step 1 and mixing.

Furthermore, when component (D) includes easily evaporable components with a boiling point of 70° C. or higher, such as ethanol (component (D)) or volatile components such as fragrance components, it is preferable to include step 4 of adding the above-mentioned components with a boiling point of 70° C. or higher and volatile components to the preparation of step 3 at low temperature and mixing.

In addition, the so-called low temperature refers to the temperature at which the above-mentioned components with a boiling point of 70°C or higher and volatile components do not evaporate or volatilize, preferably 50°C or lower, more preferably 40°C or lower, and from the viewpoint of making it easy to mix these components, it is preferably 10°C or higher, more preferably 20°C or higher.

The heating in step 1 is optional, and the heating temperature during heating is preferably at least 10°C, more preferably at least 20°C, and more preferably at most 90°C, more preferably at most 85°C, from the viewpoint of fully dissolving the water phase components without boiling the water.

The heating in step 2 is optional, and the heating temperature during heating is preferably at least 50°C, more preferably at least 55°C, and is preferably at most 90°C, more preferably at most 85°C, from the viewpoint of fully dissolving the oil-soluble components.

The solubilized skin cleanser composition of the present invention is from the viewpoint of reducing skin irritation and improving the bare skin feeling immediately after washing, preferably at pH 7-11, more preferably pH 7-10, more preferably pH 7-9.5, and more preferably pH 7.5-9.5 at 30°C.

Moreover, during production, since the hydrolysis of the non-ionic surfactant is likely to occur under long-term storage under the coexistence of water, free fatty acids are generated, and there is a possibility that the pH of the system will gradually decrease. Therefore, it is preferably set at pH 8-11, more preferably pH 8-10, more preferably pH 8-9.5, and more preferably 8.5-9.5.

Here, pH is measured by the measuring method described in an Example.

In addition, the soluble skin washing agent composition of the present invention is based on the convergence of improving and makeup dirt and improving the solubility of oily mascara, the viscosity under 30 ° C is less than 300MPA ‧S, better less than 150MPA ‧ S, and better than 80MPa ‧S or less; The better is 5MPA ‧S or more, better 10MPA ‧S or more, better than 20MPA ‧S or more.

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) was used to measure the viscosity at 30°C.

The composition of the solubilized skin cleanser of the present invention has a transparent to translucent appearance. Transparency and translucency were evaluated by the evaluation method described in the examples.

The application site of the dissolvable skin cleansing composition of the present invention is the skin, preferably the skin other than the scalp, more preferably any site such as the face, body, hands and feet, and even more preferably the face.

The solubilized skin cleanser composition of the present invention is superior in the removal power of make-up and cosmetics, and can obtain a bare skin feeling after washing after rinsing, and can be suitably used as a make-up remover and a wash-pigment that can exert the effect of removing make-up and cosmetics (foundation, mascara, eye shadow, sunscreen, lipstick, etc.) applied to the face with a single agent.

Also, the dissolving skin cleansing composition of the present invention is suitable for use as a make-up remover.

The dissolvable skin cleansing composition of the present invention can be used, for example, by applying to the skin with makeup, allowing it to blend, and then rinsing with water. Also, it can be used after applying to a cotton pad, wiping the skin with make-up, and then rinsing off.

Regarding the above-mentioned embodiments, the present invention further discloses the following compositions.

<1> A dissolving skin cleanser composition, which contains the following ingredients (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; (E) selected from ginseng (hydroxymethyl) Aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine base 0.1-6% by mass; (F) water 5-40% by mass; content ratio (B)/(A) of component (B) to component (A) is 0.06-0.35.

<2> The solubilized skin cleansing composition as in <1> above, wherein the nonionic surfactant of component (A) is preferably HLB7~12.5, more preferably HLB8~12.3, and even more preferably HLB9~12.0.

<3> The solubilizing skin cleansing composition as described in <1> or <2> above, wherein the nonionic surfactant of component (A) preferably contains two or more nonionic surfactants selected from the group consisting of (a1) nonionic surfactants with an HLB of 6 to 8, (a2) nonionic surfactants with an HLB of greater than 13 and less than 18, and (a3) nonionic surfactants having a branched alkyl group or two or more alkyl groups with an HLB of greater than 8 and less than 13 More preferably, it contains one or more than two kinds of nonionic surfactants selected from (a1) nonionic surfactants with HLB6~8 and (a2) nonionic surfactants with HLB greater than 13 and less than 18, and (a3) nonionic surfactants with branched alkyl groups or two or more alkyl groups with an HLB greater than 8 and less than 13; more preferably, it contains more than one selected from ingredient (a1), more than one selected from ingredient (a2), and more than one selected from ingredient (a3) .

<4> The solubilized skin cleanser composition as described in <3> above, wherein (a1) the nonionic surfactant of HLB6-8 preferably contains one or more kinds selected from diglyceryl isostearate, diglyceryl oleate, and glyceryl isostearyl ether, more preferably contains one or two kinds selected from diglyceryl isostearate and diglyceryl oleate, and more preferably contains diglyceryl isostearate.

<5> The dissolvable skin cleansing composition according to the above <3> or <4>, wherein (a2) the nonionic surfactant having an HLB of greater than 13 and less than 18 preferably contains one or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitol fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, more preferably contains one or more types selected from polyoxyethylene fatty acid esters and alkyl glucosides, and more preferably contains one or more types selected from polyoxyethylene fatty acid esters and alkyl glucosides. One or two selected from polyoxyethylene (12) monolaurate and decyl glucoside.

<6> The solubilizing skin cleansing agent composition according to any one of the above <3> to <5>, wherein (a3) the nonionic surfactant having a branched alkyl group or two or more alkyl groups with an HLB of greater than 8 and less than 13 preferably contains one or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters, and more preferably contains polyoxyethylene fatty acid esters, polyoxyethylene fatty acid esters, polyoxyethylene fatty acid esters, One or more of ethylene sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene glyceryl fatty acid ester, and more preferably one or more of polyoxyethylene (12) monoisostearate, polyoxyethylene (30) sorbitol tetraoleate, polyoxyethylene (20) sorbitan trioleate, and polyoxyethylene (8) glyceryl monoisostearate.

<7> The dissolvable skin cleansing composition according to any one of <3> to <6> above, wherein component (A) contains one or more selected from component (a1) and component (a2), and component (a3), the content ratio [((a1)+(a2))/(a3)] of the total of component (a1) and component (a2) to component (a3) is preferably 3.0 or more, more preferably 4.5 or more, and even more preferably Above 5.0, preferably below 10, more preferably below 9, even more preferably below 8.

<8> The dissolvable skin cleansing composition according to any one of the above <3> to <7>, wherein component (A) contains component (a1) and component (a2), and the content ratio [(a1)/(a2)] of component (a1) to component (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, still more preferably 1.6 or less.

<9> The dissolvable skin cleansing composition according to any one of the above <1> to <8>, wherein the content of component (A) is at least 10% by mass, more preferably at least 12% by mass, more preferably at least 14% by mass, and is preferably at most 25% by mass, more preferably at most 20% by mass, and more preferably at most 18% by mass, in the total composition.

<10> The dissolving skin cleansing composition according to any one of the above <1>~<9>, wherein the fatty acid salt of component (B) is preferably represented by the general formula (1): R ¹ -COOM ¹ ...(1)

(In the formula, ^R represents a linear or branched alkyl or alkenyl group with 9 to 21 carbons, and ^M represents an alkali metal, an alkaline earth metal, ammonium, ammonium derived from an alkanolamine, ginseng (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine).

<11> The dissolvable skin cleansing composition according to any one of the above <1> to <10>, wherein the fatty acid of component (B) is preferably present in the composition by mixing with unneutralized fatty acid and a neutralizing agent to form a fatty acid salt.

<12> The dissolvable skin cleansing composition according to any one of the above <1> to <11>, wherein component (B) preferably contains (b1) salts of fatty acid salts selected from alkali metals, alkaline earth metals, ammonium, and ammonium derived from alkanolamines, and (b2) salts of fatty acid salts selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; more preferably The (b1) salt is a fatty acid salt selected from alkali metals, and the (b2) salt is a fatty acid salt selected from ginseng (hydroxymethyl)aminomethane, aminomethyl propanol, aminomethylpropanediol and arginine; more preferably, the (b1) salt is a fatty acid salt selected from potassium and sodium, and the (b2) salt is a fatty acid salt selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanediol; more preferably, it contains (b1) fatty acid potassium salt and (b2) fatty acid ginseng (hydroxymethyl) amine methyl methane salt.

<13> The dissolvable skin cleansing composition according to the above <12>, wherein the content molar ratio [(b1)/(b2)] of component (b1) to component (b2) is preferably 0.3 or more, more preferably 0.4 or more, still more preferably 0.5 or more, preferably 2.5 or less, more preferably 2.0 or less, still more preferably 1.5 or less.

<14> The dissolvable skin cleansing composition according to any one of the above <1> to <13>, wherein the content of component (B) is preferably at least 0.6% by mass, more preferably at least 0.9% by mass; preferably at most 3% by mass, more preferably at most 2% by mass, in terms of fatty acid conversion.

<15> The dissolvable skin cleansing composition according to any one of the above <1> to <14>, wherein the content ratio [(B)/(A)] of component (B) to component (A) is preferably 0.065 or more, more preferably 0.070 or more, and is preferably 0.27 or less, more preferably 0.26 or less, still more preferably 0.25 or less.

<16> The dissolvable skin cleansing composition according to any one of the above <1> to <15>, wherein the oil agent of component (C) preferably contains (c1) an oil agent having a viscosity at 30°C of 15 mPa‧s or less, more preferably contains one or two or more types selected from hydrocarbon oils, ether oils, and polysiloxane oils, more preferably contains one or more types selected from hydrocarbon oils and ether oils, and more preferably contains at least hydrocarbon oils.

<17> The dissolvable skin cleansing composition according to the above <16>, wherein the content mass ratio of component (c1) to component (C) [(c1)/C)] is preferably at least 0.5, more preferably at least 0.6, even more preferably at least 0.7, and is preferably at most 0.99, more preferably at most 0.97, and more preferably at most 0.93.

<18> The solubilizing skin cleansing composition according to any one of the above <1> to <17>, wherein the oil agent of component (C) preferably contains (c2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms, and contains one or two or more selected from hexyldecyl alcohol, isostearyl alcohol, and octyldodecanol, more preferably contains one or two types selected from isostearyl alcohol and octyldodecanol, and still more preferably contains isostearyl alcohol.

<19> The dissolving skin cleansing composition according to the above <18>, wherein the mass ratio [(c2)/(C)] of component (c2) to component (C) is preferably at least 0.01, more preferably at least 0.03, even more preferably at least 0.07, and is preferably at most 0.30, more preferably at most 0.25, and more preferably at most 0.22.

<20> The dissolvable skin cleanser composition according to any one of the above <1> to <19>, wherein the content of the component (C) is preferably at least 7% by mass, more preferably at least 9% by mass, more preferably at least 10% by mass, preferably at most 16% by mass, more preferably at most 14% by mass, and more preferably at least 12% by mass, in the total composition.

<21> The solubilized skin cleansing composition according to any one of the above <1>~<20>, wherein the water-soluble solvent of component (D) preferably has an IOB value of 1.5~6.0, more preferably 1.6~4.0, even more preferably 1.7~3.4.

<22> The solubilized skin cleansing composition according to any one of the above <1> to <21>, wherein the water-soluble solvent of component (D) is preferably one or more kinds selected from monohydric alcohols and polyhydric alcohols; One or more types of pentanediol.

<23> The solubilized skin cleanser composition according to any one of the above <1> to <22>, wherein the content of component (D) is preferably at least 20% by mass, more preferably at least 30% by mass, more preferably at least 35% by mass, and is preferably at most 55% by mass, more preferably at most 50% by mass, and more preferably at most 45% by mass in the total composition.

<24> The dissolvable skin cleansing composition according to any one of <1> to <23> above, wherein the content ratio [(D)/(F)] of component (D) to component (F) is preferably at least 0.5, more preferably at least 1.0, still more preferably at least 1.2, and is preferably at most 4.0, more preferably at most 2.0, and more preferably at most 1.8.

<25> The solubilized skin cleanser composition according to any one of the above <1> to <24>, wherein the component (E) is a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; it is not in the form of a salt (it is not necessary to form a salt such as a fatty acid salt with an acidic component such as a fatty acid), but is formulated to exist in the composition in a free form.

<26> The solubilized skin cleansing composition according to any one of the above <1> to <25>, wherein the base of component (E) preferably contains one or more kinds selected from ginseng(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, and arginine, more preferably contains one or two kinds selected from ginseng(hydroxymethyl)aminomethane, aminomethylpropanol, and aminomethylpropanediol, and still more preferably contains one or more kinds selected from ginseng(hydroxymethyl)aminomethane, aminomethylpropanol, and aminomethylpropanediol. One or two kinds of aminomethane and aminomethylpropanediol, and more preferably contains ginseng (hydroxymethyl)aminomethane.

<27> The dissolvable skin cleansing composition according to any one of the above <1> to <26>, wherein the content molar ratio [(B)/(E)] of component (B) to component (E) is preferably 7 or less, more preferably 5 or less, still more preferably 3 or less, more preferably 1.5 or less, and is preferably 0.05 or more, more preferably 0.2 or more, still more preferably 0.3 or more.

<28> The dissolvable skin cleansing composition according to any one of the above <1> to <27>, wherein the content of component (E) is preferably at least 0.5% by mass, more preferably at least 0.8% by mass, and is preferably at most 4% by mass, more preferably at most 3.5% by mass, in the total composition.

<29> The dissolvable skin cleansing composition according to any one of the above <1> to <28>, wherein the water content of component (F) is preferably at least 10% by mass, more preferably at least 15% by mass, and is preferably at most 35% by mass, more preferably at most 30% by mass, in the total composition.

<30> The solubilized skin cleansing composition according to any one of the above <1> to <29>, which further contains (G) an anionic surfactant other than component (B), preferably one or two or more selected from the group consisting of alkyl sulfate ester salts, alkyl ether sulfate ester salts, ether carboxylates, and N-acyl glutamate salts, more preferably one or more types selected from the group consisting of alkyl ether sulfate ester salts and ether carboxylates.

<31> The solubilized skin cleansing composition as in <30> above, wherein the alkyl ether sulfate is preferably an alkyl ether sulfate represented by the following general formula (2): R ² O(CH ₂ CH ₂ O) _n SO ₃ M ² ‧‧‧(2)

(In the formula ( ² ), R represents an aliphatic hydrocarbon group with 8 to 22 carbon atoms; ^M represents a cation selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium, and ammonium glucosamine; n represents the average added molar number, which is 0.5 to 20); preferably, it contains more than one selected from polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, and polyoxyethylene (2) sodium lauryl ether sulfate.

<32> The dissolvable skin cleansing composition according to the above <30>, wherein the ether carboxylic acid or its salt is preferably represented by the following general formula (3): R ³ O(CH ₂ CH ₂ O) _m CH ₂ COOM ³ ‧‧‧(3)

(In formula (3), R³It means an alkyl or alkenyl group with 10~22 carbons; m means the average addition mole number, the value of 0.5~10; M³means hydrogen atom, alkali metal, alkaline earth metal, ammonium or organic ammonium); preferably contains one or two or more selected from polyoxyethylene lauryl ether carboxylic acid or its salt, polyoxyethylene myristyl ether carboxylic acid or its salt, and polyoxyethylene palm ether carboxylic acid or its salt, more preferably contains one or two or more selected from polyoxyethylene lauryl ether carboxylic acid or its salt, and polyoxyethylene myristyl ether carboxylic acid or its salt, and more preferably contains polyoxyethylene lauryl ether carboxylic acid or its salt.

<33> The dissolvable skin cleansing composition according to any one of <30> to <32> above, wherein component (B) and component (G) are preferably used in combination; the content ratio of component (B) to the total amount of component (B) and component (G) [(B)/((B)+(G))] is preferably 0.1 or more, more preferably 0.2 or more, more preferably 0.3 or more, preferably 1 or less, more preferably 0.9 or less, and still more preferably. .7 or less.

<34> The dissolvable skin cleansing composition according to any one of the above <30> to <33>, wherein component (B) and component (G) are preferably used in combination; the content ratio [((B)+(G)/(A)] of the total amount of component (B) and component (G) to component (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 0.6 0 or less, more preferably 0.45 or less.

<35> The dissolvable skin cleansing composition according to any one of the above <1> to <34>, which preferably further contains (H) an organic acid; preferably one or more kinds selected from the group consisting of hydroxycarboxylic acids and dicarboxylic acids, more preferably one or more kinds selected from dicarboxylic acids.

<36> The dissolvable skin cleansing composition according to <35> above, wherein the content of component (H) is preferably at most 0.3% by mass, more preferably 0.01 to 0.2% by mass, in the total composition.

<37> The solubilized skin cleansing composition according to any one of the above <1> to <36>, wherein the content of the cationic surfactant in the total composition is preferably at most 5% by mass, more preferably at most 3% by mass, still more preferably at most 1% by mass, and more preferably at most 0.5% by mass, and is more preferably substantially free of it.

<38> The dissolvable skin cleansing composition according to any one of the above <1>-<37>, wherein the pH is preferably pH 7-11, more preferably pH 7-10, still more preferably pH 7-9.5, and still more preferably pH 7.5-9.5 at 30°C.

<39> The solubilized skin cleansing composition according to any one of <1> to <38> above, wherein, during production, the pH is preferably 8-11, more preferably pH 8-10, still more preferably pH 8-9.5, still more preferably pH 8.5-9.5.

<40> The dissolvable skin cleansing composition according to any one of the above <1> to <39>, wherein the viscosity at 30°C is preferably not more than 300 mPa‧s, more preferably not more than 150 mPa‧s, more preferably not more than 80 mPa‧s;

<41> The dissolvable skin cleansing composition according to any one of the above <1> to <40>, which has a transparent to translucent appearance.

<42> The dissolvable skin cleansing composition according to any one of the above <1>~<41>, wherein the application site is preferably the skin, more preferably the skin other than the scalp, even more preferably any part such as the face, body, hands and feet, and more preferably the face.

<43> The dissolvable skin cleansing composition according to any one of the above <1> to <42>, which is applied to the skin with makeup, allowed to blend, and then rinsed with water.

<44> A dissolvable skin cleanser composition, which is formulated with the following ingredients (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; 0.1-6% by mass of bases of methyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; (F) water 5-40% by mass; and the content ratio (B)/(A) of component (B) to component (A) is 0.06-0.35.

<45> A method for producing a dissolvable skin cleanser composition, which is to prepare the following components (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; (E) 0.1-6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; (F) 5-40% by mass of water; and the content ratio (B)/(A) of component (B) to component (A) is 0.06-0.35.

<46> The method for producing a dissolvable skin cleansing composition according to the above <45>, including: step 1 of adding component (A), component (D), component (E), component (F), optional component (H), component (G) and other water-soluble components and mixing under arbitrary heating; step 2 of adding component (B), component (C) and optional other oil-soluble components and mixing under arbitrary heating; and preparing the preparation of step 1 in step 2 and mix in step 3.

<47> A dissolving skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F): (A) comprising two or more nonionic surfactants selected from the group consisting of (a1) nonionic surfactants with an HLB of 6 to 8, (a2) nonionic surfactants with an HLB of greater than 13 and less than 18, and (a3) nonionic surfactants having a branched alkyl group or two or more alkyl groups with an HLB of greater than 8 and less than 13 The nonionic surfactant, and the HLB when mixed is 7~30% by mass of the ionic surfactant of 6~18; (B) comprises (b1) salt is selected from alkali metal, alkaline earth metal, ammonium and the fatty acid salt of 1 or more kinds of ammonium from alkanolamine, and (b2) salt is selected from ginseng (hydroxymethyl) amino methane, amino methyl propanol, amino methyl propanediol, arginine, lysine, histidine, tryptophan and ornithine 1 Fatty acid salts of one or more kinds, calculated in fatty acid conversion, are 0.1-4% by mass; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; (E) 0.1-6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine; (F) 5-40% by mass of water; The content ratio (B)/(A) of the component (A) is 0.06-0.35, and the pH at 30° C. is 7-11.

<48> A dissolving skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F): (A) containing one or more nonionic surfactants selected from (a1) HLB6-8; (a2) one or more nonionic surfactants selected from HLB greater than 13 and not more than 18; And a nonionic surfactant of 13 or less, and a nonionic surfactant with an HLB of 6 to 18 and a nonionic surface activity of 7 to 30% by mass; (B) comprising (b1) salts of one or more fatty acid salts selected from alkali metals, alkaline earth metals, ammonium, and ammonium derived from alkanolamines, and (b2) salts selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine Fatty acid salts of one or more amino acids are 0.1-4% by mass in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; (E) 0.1-6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, and arginine; (F) 5-40% by mass of water; A) is 0.06-0.35; The content molar ratio [(b1)/(b2)] of component (b1) with respect to component (b2) of component (B) is 0.3-2.5.

<49> A dissolving skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F): (A) containing (a1) a nonionic surfactant of HLB 6-8 selected from one or more of diglyceryl isostearate, diglyceryl oleate, and glyceryl isostearyl ether; One or more of alcohol ester fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, one or more of nonionic surfactants selected from one or more of polyoxyethylene fatty acid esters and alkyl glucosides with an HLB of greater than 13 and 18 or less, and (a3) one or more of polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters. A nonionic surfactant with an alkyl group or two or more alkyl groups with an HLB of greater than 8 and less than 13, and a nonionic surfactant with an HLB of 6 to 18 and a nonionic surface activity of 7 to 30% by mass when mixed; (B) comprising (b1) a salt of one or more fatty acid salts selected from alkali metals, ammonium, and ammonium derived from alkanolamines, and (b2) a salt of one or more fatty acid salts selected from ginseng (hydroxymethyl)aminomethane and aminomethylpropanediol. 0.1-4% by mass; (C) 5-20% by mass of oil containing (c1) an oil with a viscosity of 15 mPa‧s or less at 30°C and (c2) a saturated or unsaturated branched alcohol with a carbon number of 15 or more; (D) 10-60% by mass of a water-soluble solvent with an IOB value of 1.5-6.0; %; (F) water 5-40% by mass; the content ratio (B)/(A) of component (B) relative to component (A) is 0.06-0.35; the molar ratio [(b1)/(b2)] of component (B) relative to component (b1) is 0.3-2.5;

<50> A dissolving skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F): (A) two or more nonionic surfactants selected from the group consisting of (a1) nonionic surfactants with an HLB of 6 to 8, (a2) nonionic surfactants with an HLB of greater than 13 and less than 18, and (a3) nonionic surfactants having a branched alkyl group or two or more alkyl groups with an HLB of greater than 8 and less than 13 (B) includes (b1) salts selected from alkali metals, alkaline earth metals, ammonium, and ammonium from alkanolamines, and (b2) salts selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine. Fatty acid salts of one or more kinds, calculated in fatty acid conversion, are 0.1-4% by mass; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; (E) 0.1-6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine; (F) 5-40% by mass of water; The content ratio (B)/(A) of component (A) is 0.06~0.35; the pH at 30°C is 7~11.

<51> A dissolving skin cleansing agent composition comprising the following components (A), (B), (C), (D), (E) and (F): (A) containing (a1) one or more nonionic surfactants selected from HLB 6 to 8, (a2) one or more nonionic surfactants selected from HLB greater than 13 and less than 18, and (a3) having a branched alkyl group or an HLB of more than 2 alkyl groups greater than 8 And the nonionic surfactant of 13 or less, and the HLB when mixed is 7~30% by mass of the nonionic surfactant of 6~18; (B) includes (b1) the salt is selected from alkali metals, alkaline earth metals, ammonium, and one or more fatty acid salts from alkanolamine ammonium; One or more fatty acid salts of ornithine, 0.1-4% by mass in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; (E) 0.1-6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, and arginine; (F) 5-40% by mass of water; (A) is 0.06-0.35; The content molar ratio [(b1)/(b2)] of component (b1) with respect to component (b2) of component (B) is 0.3-2.5.

<52> A dissolving skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F): (A) containing (a1) a nonionic surfactant of HLB 6-8 selected from one or more of diglyceryl isostearate, diglyceryl oleate, and glyceryl isostearyl ether; One or more kinds of ester fatty acid esters, polyoxyethylene glycerin fatty acid esters and alkyl glucosides, one or more kinds selected from nonionic surfactants selected from one or more kinds of polyoxyethylene fatty acid esters and alkyl glucosides with HLB greater than 13 and 18 or less, and (a3) one or more kinds selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters. A nonionic surfactant with an alkyl group or two or more alkyl groups with an HLB of greater than 8 and less than 13, and a nonionic surfactant with an HLB of 6 to 18 and a nonionic surface activity of 7 to 30% by mass when mixed; (B) comprising (b1) a salt of one or more fatty acid salts selected from alkali metals, ammonium, and ammonium derived from alkanolamines, and (b2) a salt of one or more fatty acid salts selected from ginseng (hydroxymethyl)aminomethane and aminomethylpropanediol. 0.1-4% by mass; (C) 5-20% by mass of oil containing (c1) an oil with a viscosity of 15 mPa‧s or less at 30°C and (c2) a saturated or unsaturated branched alcohol with a carbon number of 15 or more; (D) 10-60% by mass of a water-soluble solvent with an IOB value of 1.5-6.0; %; (F) water 5-40% by mass; the content ratio (B)/(A) of component (B) relative to component (A) is 0.06-0.35; the content molar ratio [(b1)/(b2)] of component (B) is component (b1) relative to component (b2) is 0.3-2.5; the content molar ratio (B)/(E) of component (B) relative to component (E) is 0.05-7.

<53> A method for producing a dissolvable skin cleanser composition, which comprises the following components (A), (B), (C), (D), (E) and (F): (A) a nonionic surfactant selected from (a1) a nonionic surfactant with an HLB of 6 to 8, (a2) a nonionic surfactant with an HLB of greater than 13 and less than 18, and (a3) a nonionic surfactant having a branched alkyl group or two or more alkyl groups with an HLB of greater than 8 and less than 13 2 or more non-ionic surfactants, and the HLB when mixed is 7-30% by mass of non-ionic surface activity of 6-18; (B) comprising (b1) salts selected from alkali metals, alkaline earth metals, ammonium and ammonium derived from alkanolamines, and (b2) salts selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine Fatty acid salts of one or more kinds of acids, calculated in fatty acid conversion, are 0.1-4% by mass; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; ) to the content ratio (B)/(A) of the component (A) is 0.06 to 0.35.

<54> A method for producing a dissolvable skin cleansing composition, which comprises the following components (A), (B), (C), (D), (E) and (F): (A) containing one or more nonionic surfactants selected from (a1) HLB6-8; (a2) one or more nonionic surfactants selected from HLB greater than 13 and not more than 18; A nonionic surfactant with a LB greater than 8 and less than 13, and a nonionic surface activity of 7 to 30% by mass with an HLB of 6 to 18 when mixed; (B) comprising (b1) a salt of one or more fatty acid salts selected from alkali metals, alkaline earth metals, ammonium, and ammonium from alkanolamines; One or two or more fatty acid salts of amino acid and ornithine, based on fatty acid conversion, are 0.1-4% by mass; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; (E) 0.1-6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, and arginine; (F) water 5-40% by mass; B)/(A) is 0.06-0.35; The content molar ratio [(b1)/(b2)] of component (b1) with respect to component (b2) of component (B) is 0.3-2.5.

<55> A method for producing a dissolvable skin cleanser composition, which comprises the following ingredients (A), (B), (C), (D), (E) and (F): (A) a nonionic surfactant containing (a1) HLB 6-8 or more selected from diglyceryl isostearate, diglyceryl oleate, and isostearyl glyceryl ether; One or more of ethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, one or more of nonionic surfactants selected from one or more of polyoxyethylene fatty acid esters and alkyl glucosides, and one or more of nonionic surfactants selected from the group consisting of one or more of polyoxyethylene fatty acid esters and alkyl glucosides, and (a3) one or more of polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters A nonionic surfactant having a branched alkyl group or two or more alkyl groups with an HLB greater than 8 and less than 13, and a nonionic surface activity of 7 to 30% by mass with an HLB of 6 to 18 when mixed; (B) comprising (b1) salts of one or more fatty acid salts selected from alkali metals, ammonium, and ammonium derived from alkanolamines, and (b2) salts of one or more fatty acid salts selected from ginseng (hydroxymethyl)aminomethane and aminomethylpropanediol. Calculated at 0.1-4% by mass; (C) 5-20% by mass of (c1) an oil with a viscosity of 15 mPa‧s or less at 30°C and (c2) a saturated or unsaturated branched alcohol with a carbon number of 15 or more; (D) 10-60% by mass of a water-soluble solvent with an IOB value of 1.5-6.0; (E) one or two bases selected from ginseng (hydroxymethyl)aminomethane and aminomethylpropanediol. 1 to 6% by mass; (F) 5 to 40% by mass of water; the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35; the content molar ratio [(b1)/(b2)] of component (B) to component (b2) is 0.3 to 2.5;

[Example] [Examples 1-36, Comparative Examples 1-9]

The dissolvable skin cleanser compositions with the compositions shown in Tables 1 to 4 were manufactured, and the appearance immediately after manufacture, the pH immediately after manufacture, the temperature stability immediately after manufacture (dissolution temperature range), the solubility of oily mascara, the rinsing speed, the bare skin feeling immediately after washing, and the temperature stability after long-term storage (dissolution temperature range). Also, for Examples 27 to 36, the degree of pain when entering the eyes was evaluated. The results are combined and shown in Table 1-Table 4. In addition, the content recorded in the table is an effective amount.

The following raw materials were used as the notation components described in the table.

＊1: PARLEAM4 (manufactured by NOF, viscosity 5.9mPa‧s)

＊2: KALCOL 200GD (manufactured by Kao Corporation, viscosity 41.7mPa‧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: AKYPO LM-26SD (manufactured by Kao Corporation)

＊8: AG-10LK (manufactured by Kao Corporation, HLB17)

＊9: EMANON 1112 (manufactured by Kao Corporation, HLB13.7)

*10: COSMOL41V (manufactured by Nisshin OilliO Group, HLB8)

*11: RHEODOL 430V (manufactured by Kao Corporation, HLB10.5)

(Manufacturing method)

Step 1: Add ingredients 23~25 and 27 to ingredient 29, and mix evenly at 25°C and 200rpm.

Step 2: Add ingredients 10~18 to the preparation in step 1, and mix evenly at 25°C and 200rpm.

Step 3: Mix ingredients 1~9, heat and dissolve under stirring at 80°C.

Step 4: Add the preparation of Step 3 to the preparation of Step 2, and cool to 30°C while stirring.

Step 5: Add ingredients 19-22, 26, and 28 to the preparation in step 4, and mix evenly at 200 rpm to obtain a soluble skin cleanser composition.

(Evaluation method) (1) Appearance just after manufacture:

Immediately after production, 40 mL of each skin cleansing composition was put into a 50 mL sample bottle (manufactured by Tokyo Glass Instruments Co., Ltd.: standard bottle #6), and visually observed to evaluate whether it was transparent, translucent, cloudy, separated, or precipitated.

At this time, regarding transparency, translucency, and cloudiness, a plate with a barcode with a width of 0.4 to 1.0mm in width between bars and spaces and a number with a square size of 2.0mm is printed in black on the side of the sample bottle, and when visually observed from the opposite side, it is judged as follows based on the identification of the barcode and numbers.

"Transparent" is set to the state where the lines and numbers of the barcode can be clearly recognized.

"Translucent" is set to the state where the lines of the barcode can be recognized, but the numbers cannot be recognized.

"White turbidity" is the state where the lines and numbers of the barcode cannot be recognized.

In addition, phase separation or precipitation of the content was observed in each skin cleansing composition, and it was recognized as separation and precipitation, respectively.

(2) pH immediately after manufacture

Immediately after production, the stock solution of each skin cleansing composition was measured at 30° C. with a pH meter (manufactured by Horiba, Ltd.: Desktop pH‧Water Quality Analyzer LAQUAF-72T). At this time, the measurement was performed by gently stirring for 15 minutes until the value stabilized, and the stable value after stirring was measured.

(3) Temperature stability immediately after manufacture (melting temperature range): (3-1) Determination of fog point:

Put 30 mL of each skin cleansing agent composition and a stirrer into a 50 mL sample bottle (manufactured by Tokyo Glass Instrument Co., Ltd.: bottle #6), and heat in a 70°C water bath until cloudiness occurs. Thereafter it was removed from the water bath. Under the environment of 25° C., cool the sample bottle on the stirrer with the stirring bar at 350 rpm. Here, the temperature at which the film becomes transparent to translucent is defined as the fog point.

(3-2) Determination of melting limit point:

Put 40 mL of each skin cleansing agent composition in a 50 mL sample bottle (manufactured by Tokyo Glass Instrument Co., Ltd.: bottle #6), and store in a constant temperature bath at 5°C, 0°C, and -5°C for 12 hours. Thereafter, the appearance at each temperature was visually observed to evaluate whether it was transparent, translucent, cloudy, two-layer separation, or precipitation. The lowest value of the temperature that can maintain a transparent to translucent appearance is used as the melting limit point.

(4) Solubility of oily mascara:

3 g of waterproof mascara (Maybelline, Magnum Volum Mascara waterproof type) was uniformly coated on a glass plate (MICRO SLIDE GLASS, manufactured by MATSUNAMI Co., Ltd.) in a circular shape with a diameter of 12 mm. After drying for 8 hours, 0.03 g of each skin cleansing agent composition was dropped and blended with fingertips at a speed of 1 circle per second with a pressing force of about 100 g. After 50 cycles of fusion, observe the degree of dissolution and residue of mascara, and evaluate according to the following criteria.

(judgment criteria)

5: The mascara is completely dissolved (no mascara remains on the glass plate).

4: The mascara is almost dissolved (less than 10% of the mascara remains on the glass plate).

3: The mascara is half-dissolved (more than 10%~50% of the mascara remains on the glass plate).

2: A small amount of mascara dissolves (more than 50%~90% of mascara remains on the glass plate).

1: The mascara is hardly dissolved (more than 90% of the mascara remains on the glass plate).

(5) Washing speed

Five professional sensory panelists actually applied each skin cleansing agent composition to the face, and rinsed off the agent. As an evaluation index, a wash-off paint (manufactured by Kao Corporation, Biore Skin Care wash-off paint) was used, and the rinsing speed was evaluated by the number of people who evaluated the speed of each skin cleanser composition becoming non-greasy when rinsing off to be equivalent to the wash-off paint.

(evaluation criteria)

5: 5 out of 5 persons rated as rapid flushing.

4: 4 out of 5 people evaluated that washing was rapid.

3: 3 out of 5 people evaluated that the washing was rapid.

2: 2 out of 5 people evaluated that washing was rapid.

1: Less than 1 person out of 5 evaluated that washing was rapid.

(6) Bare skin feeling just after washing

Five professional sensory panelists actually applied each skin cleansing agent composition to the face, and rinsed off the agent. As an evaluation index, using a wash-off paint (Biore Skin Care wash-off paint manufactured by Kao Corporation), the bare skin feel immediately after rinsing was evaluated based on the number of people who evaluated the skin feeling (bare skin feel) as if the skin felt thoroughly cleansed after rinsing (the skin was still moist before wiping with a towel).

(evaluation criteria)

5: 5 out of 5 people evaluated that they felt bare skin.

4: 4 out of 5 people evaluated that they felt a bare skin feeling.

3: 3 out of 5 people evaluated that they felt a bare skin feeling.

2: 2 out of 5 people evaluated that they felt bare skin.

1: Less than 1 person out of 5 evaluated that they felt a bare muscle feeling.

(7) Temperature stability after long-term storage (melting temperature range)

Evaluate the temperature stability after long-term storage. Specifically, in order to accelerate deterioration, 180 mL of each skin cleansing composition was put into a PET container (manufactured by Yoshino Kogyo Co., Ltd.: AL-CL06A case 200M NB527C Oil), stored at 50° C. for one month, and the fog point was measured by the same method as in (3-1) above. Also, the solubilization limit point was measured by the same method as in (3-2) above after similarly accelerated deterioration.

(8) The degree of pain when it enters the eyes

Three professional sensory judges, assuming that the mascara is removed, fuse each skin cleanser composition centered on the eyelashes and around the eyes for 20 seconds, open the eyes and blink 10 times, and evaluate the degree of pain when the composition enters the eyes. Set almost no pain as 4 points, feel very weak pain as 3 points, feel a little weak pain as 2 points, and feel weak pain as 1 point, obtain the average value of these evaluation points, and evaluate the degree of pain when it enters the eye. Also, when using a wash-off (manufactured by Kao Corporation, Biore Skin Care wash-off), I felt a very strong pain.

Claims (11)

A soluble skin cleanser composition, which contains the following components (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; Bases of methane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine: 0.41-6 mass %; (F) water 5-40 mass %; content ratio (B)/(A) of component (B) to component (A) is 0.06-0.35. The dissolvable skin cleansing composition according to Claim 1, wherein component (C) contains (c1) an oil agent whose viscosity at 30°C is 15 mPa‧s or less. The dissolving skin cleansing composition according to claim 1 or 2, wherein component (C) contains (c2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms. The dissolvable skin cleansing composition according to claim 1 or 2, wherein component (A) is two or more nonionic surfactants selected from (a1) nonionic surfactants with HLB6-8, (a2) nonionic surfactants with HLB greater than 13 and less than 18, and (a3) nonionic surfactants with branched alkyl groups or two or more alkyl groups with HLB greater than 8 and less than 13. The dissolvable skin cleansing composition according to claim 1 or 2, wherein the content molar ratio [(B)/(E)] of component (B) to component (E) is 7 or less. The dissolvable skin cleansing composition as claimed in item 1 or 2, wherein, component (B) It contains (b1) a salt of a fatty acid selected from potassium and sodium, and (b2) a salt of a fatty acid selected from ginseng (hydroxymethyl)aminomethane and aminomethylpropanediol; the content mass ratio [(b1)/(b2)] of component (b1) to component (b2) is 0.3 to 2.5. The dissolvable skin cleansing composition according to claim 1 or 2, wherein the pH is 7~11 at 30°C. The dissolving skin cleansing composition according to claim 1 or 2, wherein component (A) is a fatty acid ester. A solubilizing skin cleanser composition, which is formulated with the following ingredients (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in terms of fatty acid conversion; (C) 5-20% by mass of oil agent; (D) 10-60% by mass of water-soluble solvent; 0.41 to 6% by mass of bases of methyl methane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; (F) 5 to 40% by mass of water; and the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35. A method for producing a dissolvable skin cleanser composition, which is to prepare the following components (A), (B), (C), (D), (E) and (F): (A) 7-30% by mass of nonionic surfactant of HLB6-18; (B) 0.1-4% by mass of fatty acid salt in conversion of fatty acid; (C) 5-20% by mass of oil agent; (D) 10 to 60% by mass of a water-soluble solvent; (E) 0.41 to 6% by mass of a base selected from ginseng (hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, and ornithine; (F) 5 to 40% by mass of water; The use of a dissolving skin cleansing agent composition according to claim 1 or 2 as a makeup remover.