CN112236125A - Solubilized skin cleanser composition - Google Patents

Abstract

A solubilized skin cleanser composition, which contains the following components (A), (B), (C), (D), (E) and (F): (A) nonionic surfactants of HLB6-18 agent 7-30 mass %; (B) fatty acid salt is 0.1-4 mass % in terms of fatty acid; (C) oil agent 5-20 mass %; (D) water-soluble solvent 10-60 mass %; ( F) Water 5-40 mass %; Content ratio (B)/(A) of component (B) with respect to component (A) is 0.06-0.35.

Description

Solubilized skin cleanser composition

Technical Field

The present invention relates to a solubilized skin cleanser composition.

Background

It is known that solid oil and fat components contained in makeup soils which are difficult to remove, such as water-repellent mascara, are removed by dissolving them with an oil agent. Therefore, makeup removers using oils as cleansing ingredients have been marketed in various formulations such as creams, gels, and liquids (liquids).

These preparations are usually prepared by appropriately combining nonionic surfactants for rinsing oils dissolved with dirt. However, a preparation in which only an oil agent and a nonionic surfactant are combined has a problem that the preparation is not clean due to sliminess during cleaning or oil agent remaining after rinsing. Therefore, many consumers further clean with a cleanser such as a cleanser after removing makeup.

For example, patent document 1 describes a makeup remover composition containing a nonionic surfactant having a specific HLB, a low viscosity oil agent, and a water-soluble solvent, which is excellent in makeup cleansing power and can be washed out cleanly. However, this makeup remover composition can be rinsed off without being greasy, but cannot give a clean feeling of skin feeling as if the skin was washed with a cleanser completely.

Further, there have been studied makeup removing compositions in which an anionic surfactant is combined with a nonionic surfactant, an oil agent and a polyhydric alcohol (patent documents 2 and 3), and the anionic surfactant has an effect of improving the cleansing property of the composition, but the cleansing compositions cannot give a clean skin feel like a clean face to the skin after cleansing.

Patent document 4 describes a cleansing composition which is obtained by combining an anionic surfactant, a silicone nonionic surfactant, and silicone oil to impart a refreshing feeling. However, when an anionic surfactant and a nonionic surfactant are coexistent, the limitation of the surfactants to be selected is large from the viewpoint of long-term stability, and a composition giving a clean feeling while maintaining sufficient stability cannot be obtained.

(patent document 1) Japanese patent application laid-open No. 2008-184415

(patent document 2) Japanese patent laid-open No. 2013-1698

(patent document 3) Japanese patent laid-open No. Hei 9-175936

(patent document 4) Japanese patent application laid-open No. 2000-336014

Disclosure of Invention

The present invention relates to a solubilizing skin cleanser composition which contains the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06-0.35:

(A) 7-30 mass% of a nonionic surfactant having HLB of 6-18;

(B) the content of the fatty acid salt is 0.1-4 mass% in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

Detailed Description

The present invention is to solubilize a makeup cosmetic, which is difficult to remove such as a waterproof mascara, by combining an oil agent with a nonionic surfactant having a proper HLB and a proper amount of a fatty acid salt to thereby exert the cleansing power of the oil agent when applied to the skin. Also, the object is to obtain a cleanser composition which can leave a clean skin feeling due to the formation of a floating film (scum) of a fatty acid salt on the skin after being rapidly washed without being greasy at the time of washing and can actually feel the skin feeling as if washed with a cleanser.

Further, when a nonionic surfactant and a fatty acid salt are combined, since the pH is alkaline, a fatty acid is generated by hydrolysis of the nonionic surfactant during long-term storage, and the fatty acid becomes a state in which the degree of neutralization is lowered, and the problem of precipitation at a low temperature is also solved.

The present inventors have found that a solubilized skin cleansing composition which contains a specific nonionic surfactant, a fatty acid salt, an oil agent, a water-soluble solvent, a specific alkali and water and which, when used in combination with a specific nonionic surfactant and a fatty acid salt at a specific ratio, has excellent long-term storage stability and high cleansing power, is not greasy during rinsing and can be quickly cleansed, and imparts a fresh touch to the cleansed skin.

The solubilized skin cleanser composition of the present invention has high cleansing power, can be quickly washed without being greasy during rinsing, can impart a refreshing feeling to the skin after washing as if it were washed with a cleanser, and is also excellent in long-term storage stability. Further, the eye irritation is also improved.

In the present invention, solubilization means a thermodynamically stable liquid phase in which an oil agent and an aqueous phase component are dissolved by a surfactant, and the liquid phase shows a transparent to translucent appearance.

In the solubilizing skin cleansing composition of the present invention, the nonionic surfactant and the anionic surfactant are mainly used together to form a solubilizing system, but since the HL (hydrophilic-hydrophobic) balance of the nonionic surfactant changes with temperature, the solubilizing composition has a cloud point on the high temperature side and a solubilizing limit point on the low temperature side. The region between this cloud point and the solubilization limit point is called the solubilization temperature region, and the expansion of this temperature region will result in the expansion of the stable temperature region of the resulting solubilizing composition while increasing the solubilizing power of the oil amount.

As the solubilized product, it is important that the appearance does not change in the temperature range of actual use, and it is preferable to maintain the solubilized state in the temperature range of 0 ℃ to 40 ℃ in order to be able to withstand the use in actual life. Furthermore, if the storage conditions are taken into consideration, it is more preferable to maintain the solubilized state in the range of-5 ℃ to 50 ℃.

The nonionic surfactant of the component (A) used in the present invention is a nonionic surfactant having an HLB of 6 to 18. The nonionic surfactant of the component (a) functions to solubilize the oil agent as the component (C) together with the fatty acid salt of the component (B).

Here, HLB (hydrophilic lipophilic balance) is calculated from Griffin's formula (J, Soc, Cosmet, chem.,1,311 (1949); 5,249 (1953)).

The nonionic surfactant of the component (A) must be adjusted to an HLB suitable for solubilization in the presence of the component (B), and from the viewpoint of extending the solubilization temperature range, the HLB is preferably 7-12.5, more preferably 8-12.3, and still more preferably 9-12.0.

From the viewpoint of providing a cleanser that is milder to the skin, the cleanser is preferably a fatty acid ester, and more preferably at least 1 selected from the group consisting of a glycerin fatty acid ester, a polyglycerin fatty acid ester, a polyoxyethylene glycerin fatty acid ester, a polyoxyethylene sorbitan fatty acid ester, and a polyoxyethylene sorbitan fatty acid ester.

The nonionic surfactant of component (a) may be used in 1 type or in combination of 2 or more types, and when 2 or more types of nonionic surfactants are combined, it is necessary to use them so that the HLB value at the time of mixing them falls within the above range.

The HLB value in mixing 2 or more nonionic surfactants is obtained by adding the HLB values of the respective nonionic surfactants to calculate an average value according to the mixing ratio, as described below. The HLB value in the mixing of 2 or more nonionic surfactants is set to be within the above HLB range.

HLB during mixing ═ Sigma (HLBx × Wx)/Sigma Wx

HLBx represents the HLB value of the nonionic surfactant X.

Wx represents the mass (g) of the nonionic surfactant X having an HLBx value.

From the viewpoint of increasing the solubilizing capacity of the oil agent and extending the solubilizing temperature range, the nonionic surfactant of component (a) is preferably used in a mixture of 2 or more nonionic surfactants having different HLBs, and preferably contains: 2 or more nonionic surfactants selected from (a1) nonionic surfactants having HLB 6-8, (a2) nonionic surfactants having HLB of more than 13 and not more than 18, and (a3) nonionic surfactants having branched alkyl groups or 2 or more alkyl groups and having HLB of more than 8 and not more than 13; more preferably contains: 1 or 2 or more nonionic surfactants selected from the group consisting of (a1) nonionic surfactants having an HLB of 6 to 8 and (a2) nonionic surfactants having an HLB of more than 13 and not more than 18, and (a3) nonionic surfactants having a branched alkyl group or 2 or more alkyl groups and having an HLB of more than 8 and not more than 13; further preferably contains: at least one selected from the group consisting of component (a1), at least one selected from the group consisting of component (a2), and at least one selected from the group consisting of component (a 3).

Examples of the nonionic surfactant having HLB 6-8 (a1) include polyglycerin fatty acid esters such as diglycerin oleate and diglycerin isostearate; polyglycerin alkyl ethers such as diglycerin 2-ethylhexyl ether and isostearyl glyceryl ether; polyethylene glycol fatty acid esters such as polyethylene glycol (5) monostearate, and the like.

Among these, from the viewpoint of further extending the solubilization temperature range, 1 or 2 or more selected from the group consisting of diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether are preferably contained, more preferably 1 or 2 selected from the group consisting of diglycerol isostearate and diglycerol oleate are contained, and still more preferably diglycerol isostearate is contained.

Examples of the nonionic surfactant (a2) having an HLB of more than 13 and not more than 18 include polyoxyethylene 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) glycerin monostearate; sucrose fatty acid esters such as sucrose stearate; and alkyl polyglucosides such as decyl glucoside.

Among these, from the viewpoint of further extending the solubilization temperature range, the composition preferably contains 1 or 2 or more species selected from among polyoxyethylene fatty acid esters having an alkyl group having 8 to 18 carbon atoms, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, more preferably contains 1 or 2 or more species selected from among polyoxyethylene fatty acid esters and alkyl glucosides, and still more preferably contains 1 or 2 species selected from among polyoxyethylene (12) monolaurate and decyl glucoside.

(a3) In the nonionic surfactant having a branched alkyl group or 2 or more alkyl groups with an HLB of more than 8 and not more than 13, the branched alkyl group is preferably a branched alkyl group having 8 to 18 carbon atoms, and examples thereof include octyldodecyl group, hexyldecyl group, isostearyl group, and the like. The alkyl group is preferably an alkyl group having 8 to 18 carbon atoms.

Specific examples thereof 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 polyoxyethylene (30) tetraoleate sorbitol, polyoxyethylene alkyl ethers such as polyoxyethylene (20) octyldodecyl ether, polyoxyethylene hydrogenated castor oil derivatives such as polyoxyethylene (60) hydrogenated castor oil monoisolaurate, and polyoxyethylene glycerin fatty acid esters such as polyoxyethylene (8) glyceryl monoisostearate.

Among these, 1 or 2 or more selected from among polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters are preferably contained, 1 or 2 or more selected from among polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene glycerin fatty acid esters are more preferably contained, and 1 or 2 or more selected from among polyoxyethylene (12) monoisostearate, polyoxyethylene (30) tetraoleate sorbitol, polyoxyethylene (20) sorbitan trioleate, and polyoxyethylene (8) glyceryl monoisostearate are further preferably contained.

When the component (a) contains 1 or 2 or more selected from the component (a1) and the component (a2), and the component (a3), the content ratio of the total of the component (a1) and the component (a2) to the component (a3 [ ((a1) + (a2))/(a3) ] is preferably 3.0 or more, more preferably 4.5 or more, further preferably 5.0 or more, preferably 10 or less, more preferably 9 or less, and further preferably 8 or less, from the viewpoint of extending the solubilization temperature region.

When the component (a) contains the component (a1) and the component (a2), the content ratio [ (a1)/(a2) ] of the component (a1) to the component (a2) is preferably 0.4 or more, more preferably 0.6 or more, further preferably 0.8 or more, preferably 8 or less, more preferably 2.4 or less, and further preferably 1.6 or less, from the viewpoint of extending the solubilization temperature range.

The content of the component (a) in the solubilizing skin cleanser composition is 7% by mass or more, preferably 10% by mass or more, more preferably 12% by mass or more, and further preferably 14% by mass or more, and 30% by mass or less, preferably 25% by mass or less, more preferably 20% by mass or less, and further preferably 18% by mass or less in the total composition, from the viewpoint of maintaining the solubility of the oily mascara and extending the solubilizing temperature range. The content of the component (A) is 7 to 30% by mass, preferably 10 to 25% by mass, more preferably 12 to 20% by mass, and further preferably 14 to 18% by mass in the total composition.

The fatty acid salt of the component (B) has an effect of solubilizing the component (C) together with the component (a). Further, it has an effect of emphasizing a feeling of bare skin by improving the washing speed and giving a clean feeling to the skin after washing.

As the fatty acid salt of the component (B), a substance represented by the general formula (1):

R¹-COOM¹…(1)

(in the formula, R¹M represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms¹Represents an alkali metal, an alkaline earth metal, ammonium from an alkanolamine, tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine).

In addition, from the viewpoint of maintaining low-temperature stability after long-term storage, washing speed, and improving bare skin feel immediately after washing, R is¹The number of carbon atoms of (A) is more preferably 10 to 20, still more preferably 12 to 18.

More specifically, the fatty acid portion may be 1 or 2 or more fatty acid salts selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, and behenic acid. Among these, from the viewpoint of expanding the solubilization temperature region, the washing speed, and improving the bare muscle feel immediately after washing, it is preferable to contain a fatty acid salt having a fatty acid moiety of 1 or 2 or more selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and oleic acid, more preferably 1 or 2 or more selected from lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid, still more preferably 3 or more selected from lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid, and still more preferably a fatty acid salt having a fatty acid moiety of lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid.

Examples of the salt of the fatty acid salt include alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; ammonium from alkanolamines such as monoethanolamine, diethanolamine, triethanolamine and the like; tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine.

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

The neutralizing agent is a compound exhibiting basicity, and examples thereof include sodium hydroxide, potassium hydroxide, triethanolamine, tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, ornithine and the like.

In general, anionic surfactants have a high irritating sensation when entering the eye. On the other hand, in the makeup removal, since the makeup is easily put into the eyes by performing a careful fusion or the like for removing the makeup around the eyes, the makeup cannot be sufficiently removed if pain occurs when the makeup is put into the eyes. In the solubilizing composition of the present invention, it is required not to cause intense pain to eyes because of containing the anionic surfactant of the component (B). Further, it is also required to maintain the washing speed or the bare skin feeling immediately after washing. From these viewpoints, it is preferable that the composition contains (b1) a salt selected from fatty acid salts of alkali metals, alkaline earth metals, ammonium and ammonium derived from alkanolamines, and (b2) a salt selected from fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine; more preferably (b1) a salt selected from the group consisting of fatty acid salts of alkali metals, and (b2) a salt selected from the group consisting of fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine; more preferably (b1) a salt selected from the group consisting of fatty acid salts of potassium and sodium, and (b2) a salt selected from the group consisting of fatty acid salts of tris (hydroxymethyl) aminomethane and aminomethylpropanediol; still more preferably (b1) a potassium salt of a fatty acid and (b2) a tris (hydroxymethyl) aminomethane salt of a fatty acid.

The content molar ratio [ (b1)/(b2) ] of the component (b1) to the component (b2) is preferably 0.3 or more, more preferably 0.4 or more, further preferably 0.5 or more, preferably 2.5 or less, more preferably 2.0 or less, further preferably 1.5 or less, from the viewpoint of maintaining the washing speed and reducing pain at the time of entering the eye.

The content of the component (B) in the solubilized skin cleanser composition, in terms of fatty acid, is 0.1% by mass or more, preferably 0.6% by mass or more, and more preferably 0.9% by mass or more, in the total composition, from the viewpoint of enhancing the speed of disappearance of greasy feeling during washing and improving the feeling of bare skin after washing; from the viewpoint of maintaining low-temperature stability, the content is 4% by mass or less, preferably 3% by mass or less, and more preferably 2% by mass or less. The content of the component (B) is 0.1 to 4% by mass, preferably 0.6 to 3% by mass, and more preferably 0.9 to 2% by mass in the total composition.

Here, the content in terms of fatty acid is calculated by expressing the content of fatty acid in terms of corresponding fatty acid salt (for example, in the case of potassium salt of stearic acid, the corresponding fatty acid is stearic acid).

In the present invention, the content ratio [ (B)/(a) ] of the component (B) to the 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, further preferably 0.25 or less, from the viewpoint of extending the solubilization temperature region. The content of the component (B) is a fatty acid equivalent. The content ratio [ (B)/(A) ] of the component (B) to the component (A) is 0.06 to 0.35, preferably 0.065 to 0.27, more preferably 0.07 to 0.26, and still more preferably 0.07 to 0.25.

The content of the component (B) is calculated in terms of the fatty acid.

The oil agent of the component (C) has an effect of dissolving or dispersing in a makeup. The oil agent of the component (C) may be any oil agent as long as it is an oil agent used in a general detergent composition.

As such an oil agent, a liquid oil generally used in cosmetics can be used, and examples thereof include hydrocarbon oils such as isododecane, isohexadecane, liquid paraffin, liquid isoparaffin, hydrogenated polyisobutene, and squalane; ester oils of cholesterol isostearate, isopropyl palmitate, isopropyl myristate, neopentyl glycol dicaprate, isopropyl isostearate, stearyl myristate, cetyl 2-ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, glycerol tris (2-ethylhexanoate), glycerol tris (caprylic/capric) and the like; ether oils such as dilauryl ether, dioctyl ether, cetyl-1, 3-dimethylbutyl ether, and nonylphenyl ether; dimethyl cyclic polysiloxanes such as octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane; silicone oils such as tris (trimethylsilyl) methylsilane, tetrakis (trimethylsilyl) silane, dimethylpolysiloxane, and methylphenylpolysiloxane; alcohol such as isostearyl alcohol, hexyldecanol, and octyldodecanol, and animal and vegetable oil such as olive oil; terpene oils and the like. These may be used in 1 kind or in combination of 2 or more kinds.

The oil agent as component (C) preferably contains (C1) an oil agent having a viscosity of 15mPa · s or less at 30 ℃, more preferably 12mPa · s or less, and still more preferably 10mPa · s or less, from the viewpoint of exhibiting high solubility of the oily mascara and improving the bare skin feel immediately after washing; from the viewpoint of suppressing the dripping at the time of coating and maintaining the safety, it is preferably 1mPa · s or more, more preferably 3mPa · s or more.

In the measurement of the viscosity, the viscosity at 30 ℃ was measured using a B-type viscometer (TVB-10R-type viscometer, manufactured by Toyobo industries Co., Ltd., measurement conditions: spindle No.1, 60rpm, 60 seconds).

The component (c1) preferably contains 1 or 2 or more selected from hydrocarbon oils, ether oils and silicone oils, more preferably 1 or 2 or more selected from hydrocarbon oils and ether oils, and still more preferably at least hydrocarbon oils, from the viewpoint of maintaining a wide solubilization temperature range and improving long-term storage stability and solubility of oily mascara.

From the above viewpoint, the hydrocarbon oil preferably contains 1 or 2 or more species selected from the group consisting of liquid isoparaffins, isododecane, and isohexadecane, and more preferably contains 1 or 2 or more species selected from the group consisting of isododecane and isohexadecane.

From the above viewpoint, the etheric oil preferably contains 1 or 2 or more selected from the group consisting of dilauryl ether, dioctyl ether, and cetyl-1, 3-dimethylbutyl ether.

From the above viewpoint, the silicone oil preferably contains a silicone oil selected from the group consisting of kinematic viscosity (manufacturer's catalog value) of 1.5 to 10mm²1 or more than 2 of dimethyl polysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, tri (trimethylsilyl) methylsilane, tetra (trimethylsilyl) silane and methyl phenyl polysiloxane; more preferably, the viscosity of the polymer is 1.5 to 2mm²1 or more than 2 of dimethylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and tris (trimethylsilyl) methylsilane.

The content mass ratio [ (C1)/(C) ] of the component (C1) in the component (C) is preferably 0.5 or more, more preferably 0.6 or more, further preferably 0.7 or more, and preferably 0.99 or less, more preferably 0.97 or less, further preferably 0.93 or less, from the viewpoint of improving the solubility of the oily mascara and increasing the speed of disappearance of sliminess during washing.

The oil agent of component (C) preferably contains (C2) a branched saturated or unsaturated alcohol having 15 or more carbon atoms in order to extend the solubilization temperature range. From the viewpoint of extending the solubilization temperature range, the saturated or unsaturated branched alcohol having 15 or more carbon atoms preferably has 16 or more carbon atoms, more preferably 17 or more carbon atoms, still more preferably 18 or more carbon atoms, and preferably 22 or less, more preferably 21 or less, still more preferably 20 or less carbon atoms. From the viewpoint of improving long-term storage stability, the branched alcohol preferably contains a saturated branched monohydric alcohol, and more preferably contains a saturated branched monohydric alcohol.

Specifically, the saturated or unsaturated branched alcohol having 15 or more carbon atoms preferably contains 1 or 2 or more selected from hexyldecanol, isostearyl alcohol, and octyldodecanol, more preferably 1 or 2 selected from isostearyl alcohol and octyldodecanol, and still more preferably isostearyl alcohol, from the viewpoint of extending the solubilization temperature region and improving long-term storage stability.

The content mass ratio [ (C2)/(C) ] of the component (C2) in the component (C) is preferably 0.01 or more, more preferably 0.03 or more, further preferably 0.07 or more, and preferably 0.30 or less, more preferably 0.25 or less, further preferably 0.22 or less, from the viewpoint of improving the feeling of bare muscle immediately after washing and expanding the solubilization temperature range.

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

The water-soluble solvent of component (D) has an effect of forming an aqueous phase together with the water of component (F) and regulating the HL balance by controlling the solubility of the surfactant in the aqueous phase, and also has an effect of suppressing the dry feeling of the skin after use.

The water-soluble solvent as the component (D) is not particularly limited as long as it is a water-soluble solvent used in usual cosmetics. Preferably, the aqueous solvent has an IOB value of 1.5 to 6.0, more preferably 1.6 to 4.0. As the water-soluble solvent, 1 or 2 or more selected from monohydric alcohols and polyhydric alcohols are preferably used from the viewpoint of good compatibility with the component (F) and suppression of dry skin feel after use.

Here, the IOB value is a short name of Inorganic/Organic Balance, is a value indicating a ratio of an Inorganic value to an Organic value, and is an index indicating a degree of polarity of an Organic compound. Specifically, the IOB value is expressed as an inorganic value/organic value. The "inorganic value" and the "organic value" are each set to 20 for 1 carbon atom in the molecule and 100 for 1 hydroxyl group, respectively, and are set to an "inorganic value" and an "organic value" for each atom or functional group, respectively, and the IOB value of the organic compound can be calculated by adding the "inorganic value" and the "organic value" of all atoms and functional groups in the organic compound (see, for example, kantian gakun, "organic concept diagram-basis and application-" p 11-17, three publications, published 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 isoprene glycol; glycerin such as glycerin and diglycerin; saccharides such as sorbitol, maltitol, mannose, fructose, xylitol, maltotriose, threitol, erythritol, and glucose; and a polyol such as a sugar derivative such as methyl glucoside or ethyl glucoside.

Of these, from the viewpoint of maintaining a wide solubilization temperature range and improving long-term storage stability, 1 or 2 or more selected from ethanol (IOB: 2.5), propylene glycol (IOB: 3.3), dipropylene glycol (IBO: 1.8), 1, 3-butanediol (IOB: 2.5), isoprene glycol (IOB: 2.2), glycerin (IOB: 5.0), diglycerin (IOB: 3.5), sorbitol (IOB: 5.0) and maltitol (IOB: 4.4) are preferable, 1 or 2 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol, isoprene glycol and diglycerin are more preferable, and 1 or 2 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol and isoprene glycol are further more preferable.

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

The content ratio [ (D)/(F) ] of the component (D) to the component (F) is preferably 0.5 or more, more preferably 1.0 or more, further preferably 1.2 or more, and preferably 4.0 or less, more preferably 2.0 or less, further preferably 1.8 or less, from the viewpoint of extending the solubilization temperature range and suppressing stickiness after washing. The content ratio [ (D)/(F) ] of the component (D) to the component (F) is preferably 0.5 to 4.0, more preferably 1.0 to 2.0, and still more preferably 1.2 to 1.8.

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

These bases are not in the form of salts (salts such as fatty acid salts with acidic components such as fatty acids are not required), and are present in the composition in the form of free form.

The solubilized skin cleanser composition of the present invention contains a fatty acid salt, and thus has an alkaline pH. However, hydrolysis of the nonionic surfactant is likely to occur during long-term storage in the presence of moisture, free fatty acid is produced, and the pH of the system gradually decreases. The change also affects the degree of neutralization of fatty acids, and non-neutralized fatty acids are likely to precipitate at low temperatures. In the present invention, the solubilizing skin cleanser composition further contains the component (E) and neutralizes free fatty acids generated during long-term storage in the presence of water, thereby promoting re-dissolution.

In addition, when the (B2) salt is a fatty acid salt selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, and the neutralizing agent for forming the fatty acid salt of (B2) incorporated in the composition is the same as the component (E), the component (E) is an amount more than the amount necessary for the neutralization of the anionic surfactant.

Specifically, the fatty acid salt of the component (B) is blended in an amount exceeding 1 neutralization equivalent when the fatty acid is neutralized only by (B2) as the component (E).

In the case of using the anionic surfactants (G) other than the component (B) in combination, the amount of the non-neutralized component in the component (G) is calculated separately as 1 neutralization equivalent, and the amount of the non-neutralized component in the component (G) is calculated as 1 neutralization equivalent in total of the components (B) and (G). The amount of the component (E) is more than 1 neutralization equivalent of the total of the component (B) and the component (G).

When (B1) and (B2) are used in combination, the amount of component (B2) is calculated as component (B) by taking the neutralization of (B1) as priority, and when the neutralization equivalent of (B1) is less than 1, the amount of component (B2) is calculated as (1 neutralization equivalent — the neutralization equivalent of component (B1)). The remaining component (b2) in an amount exceeding 1 neutralizing equivalent is taken as component (E).

The base as the component (E) preferably contains 1 or 2 or more selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol and arginine, more preferably contains 1 or 2 or more selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol and aminomethylpropanediol, still more preferably contains 1 or 2 or more selected from the group consisting of tris (hydroxymethyl) aminomethane and aminomethylpropanediol, and still more preferably contains tris (hydroxymethyl) aminomethane from the viewpoint of extending the solubilization temperature range and improving the long-term storage stability.

In the present invention, the content molar ratio [ (B)/(E) ] of the component (B) to the component (E) is preferably 7 or less, more preferably 5 or less, further preferably 3 or less, still more preferably 1.5 or less, and preferably 0.05 or more, more preferably 0.2 or more, further preferably 0.3 or more, from the viewpoint of maintaining the low-temperature stability for a long period of time and improving the cleaning rate. The content molar ratio [ (B)/(E) ] of the component (B) to the component (E) is preferably 0.05 to 7, more preferably 0.2 to 5, still more preferably 0.3 to 3, and yet more preferably 0.3 to 1.5.

The molar amount of the component (B) is calculated as a molar amount of fatty acid in terms of fatty acid, and is calculated as a molar amount of fatty acid corresponding to the fatty acid salt.

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

The content of water of component (F) is 5% by mass or more, preferably 10% by mass or more, more preferably 15% by mass or more, and 40% by mass or less, preferably 35% by mass or less, more preferably 30% by mass or less in the solubilized skin cleanser composition, from the viewpoint of maintaining sufficient cleansing power and enabling thorough rinsing at the time of washing. The content of water in the component (F) is 5 to 40 mass%, preferably 10 to 35 mass%, more preferably 15 to 30 mass% in the total composition.

The solubilizing skin cleanser composition of the present invention may further contain an anionic surfactant other than the component (B) of (G) from the viewpoint of suppressing the dry feeling during washing and further improving the low-temperature stability.

As the component (G), anionic surfactants used in general skin cleansers may be exemplified by alkylbenzenesulfonates, alkanesulfonates, alkenylsulfonates, alkylsulfonates, acyl isethionates, alkyl sulfate salts, alkyl ether sulfate salts, alkyl sulfosuccinates, sulfo fatty acid methyl ester salts, fatty acid alkanolamide sulfate salts, monoacylglycerol sulfate salts, alkyl phosphate salts, polyoxyethylene alkyl ether phosphate salts, alkylaryl ether phosphate salts, fatty acid amide ether phosphoric acids, ether carboxylic acids or salts thereof, N-acylamino acid salts, and the like.

Among these, from the viewpoint of suppressing dry feeling due to the clean skin feel caused by fatty acid floating films, making the bare skin feel good immediately after washing, increasing the washing speed, and suppressing deposition at low temperatures, it is preferable to contain 1 or 2 or more selected from alkyl sulfate salts, alkyl ether sulfate salts, ether carboxylates, and N-acyl glutamates, more preferable to contain 1 or 2 or more selected from alkyl ether sulfate salts and ether carboxylates, and still more preferable to contain 1 or 2 or more selected from ether carboxylates.

Examples of the alkyl ether sulfate salt include alkyl ether sulfate salts represented by the following general formula (2).

R²O(CH₂CH₂O)_nSO₃M²…(2)

(in the formula (2), R²An aliphatic hydrocarbon group having 8 to 22 carbon atoms; m²Represents a cation selected from the group consisting of alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium and glucammonium; n represents an average molar number of addition and is 0.5 to 20. )

In the general formula (2), R²From the viewpoint of good low-temperature stability, a C8-16 ester is preferredThe aliphatic hydrocarbon group is more preferably an aliphatic hydrocarbon group having 8 to 14 carbon atoms, and still more preferably an aliphatic hydrocarbon group having 10 to 14 carbon atoms.

From the same viewpoint as above, n is preferably 0.5 or more, and preferably 12 or less, more preferably 5 or less, further preferably 4 or less, and still more preferably 2 or less. The specific range of n is preferably 0.5 to 12, more preferably 0.5 to 5, further preferably 0.5 to 4, and further preferably 0.5 to 2. M²From the same viewpoints as described above, alkali metals and ammonium are preferred, alkali metals are more preferred, and sodium salts are further preferred.

Specific examples of the alkyl ether sulfate salt include 1 or 2 or more selected from the group consisting of sodium polyoxyethylene (1) lauryl ether sulfate, ammonium polyoxyethylene (1) lauryl ether sulfate, sodium polyoxyethylene (1) myristyl ether sulfate, sodium polyoxyethylene (2) lauryl ether sulfate, and sodium polyoxyethylene (2) myristyl ether sulfate. Among these, 1 or more selected from the group consisting of sodium polyoxyethylene (1) lauryl ether sulfate, ammonium polyoxyethylene (1) lauryl ether sulfate, and sodium polyoxyethylene (2) lauryl ether sulfate are preferably contained. In the present specification, the parenthesized numerical values of these compounds refer to the average molar number of addition of ethylene oxide.

Examples of commercially available products of such alkyl ether sulfate salts include EMAL 125HP (sodium polyoxyethylene (1) lauryl ether sulfate, manufactured by kao corporation), EMAL 125A (ammonium polyoxyethylene (1) lauryl ether sulfate, manufactured by kao corporation), EMAL 227 (sodium polyoxyethylene (2) lauryl ether sulfate, manufactured by kao corporation), and the like.

Examples of the ether carboxylic acid or a salt thereof include an ether carboxylic acid represented by the following general formula (3) or a salt thereof.

R³O(CH₂CH₂O)_mCH₂COOM³…(3)

(in the formula (3), R³Represents an alkyl group or alkenyl group having 10 to 22 carbon atoms; m represents an average addition mole number and is a number of 0.5 to 10; m³Represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or an organic ammonium. )

In the general formula (3), as R³From the viewpoint of low-temperature stability, an alkyl group having 12 to 14 carbon atoms is preferred.

From the same viewpoint as above, the average molar number m of ethylene oxide added is preferably 2 to 5.

M³Examples of such may be: a hydrogen atom; 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 these, from the same viewpoint as described above, 1 or 2 or more species are preferably selected from sodium, potassium, triethanolamine, and arginine, and 1 or 2 species are more preferably selected from sodium and potassium.

From the same viewpoint as above, the ether carboxylic acid or salt thereof preferably contains 1 or 2 or more selected from polyoxyethylene lauryl ether carboxylic acid or salt thereof, polyoxyethylene myristyl ether carboxylic acid or salt thereof, and polyoxyethylene palmityl ether carboxylic acid or salt thereof, more preferably contains 1 or 2 or more selected from polyoxyethylene lauryl ether carboxylic acid or salt thereof, and still more preferably contains polyoxyethylene lauryl ether carboxylic acid or salt thereof.

Further, as commercial products of such ether carboxylic acids or salts thereof, there can be exemplified: AKYPO RLM 45CA (manufactured by Kao corporation), AKYPO LM 26C (manufactured by Kao corporation), and the like.

When the component (B) and the component (G) are used in combination, the content ratio of the component (B) to the total amount of the component (B) and the component (G) [ (B)/((B) + (G)) ] is preferably 0.1 or more, more preferably 0.2 or more, further preferably 0.3 or more, preferably 1 or less, more preferably 0.9 or less, further preferably 0.7 or less, from the viewpoint of maintaining the washing speed, improving the bare skin feel immediately after washing, and improving the low-temperature stability. The contents of the component (B) and the component (G) are acid equivalent values.

When the component (B) and the component (G) are used in combination, the content ratio of the total amount of the component (B) and the component (G) to the component (a) [ ((B) + (G)/(a) ] is preferably 0.11 or more, more preferably 0.12 or more, further preferably 0.14 or more, preferably 0.70 or less, more preferably 0.60 or less, further preferably 0.45 or less, and the contents of the component (B) and the component (G) are acid equivalent values, from the viewpoint of maintaining the washing speed, improving the bare skin feel immediately after washing, and improving the low-temperature stability.

The solubilized skin cleanser composition of the present invention may further contain (H) an organic acid from the viewpoint of adjusting and maintaining the pH of the system within a predetermined range. From the viewpoint of enhancing the corrosion prevention performance, 1 or 2 or more species selected from hydroxycarboxylic acids and dicarboxylic acids are preferable, and 1 or more species selected from dicarboxylic acids is more preferable. Specific examples of the hydroxycarboxylic acid 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, and adipic acid.

The content of the component (H) in the solubilizing skin cleanser composition may be appropriately contained for the purpose of adjusting the pH to the range described below, and is preferably 0.3% by mass or less, more preferably 0.01 to 0.2% by mass in the solubilizing skin cleanser composition, from the viewpoint of long-term storage stability and improving the bare skin feel immediately after washing.

The solubilizing skin cleanser composition of the present invention may further contain ingredients used in general cleansers, such as surfactants other than the above-mentioned ingredients (a), (B) and (G), moisturizers other than the above-mentioned ingredient (D), oily ingredients other than the above-mentioned ingredient (C), bactericides, anti-inflammatory agents, preservatives, chelating agents, thickeners, abrasives, perfumes, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts, and the like.

The solubilizing skin cleanser composition of the present invention may further contain a cationic surfactant from the viewpoint of providing a smooth feeling to the skin. The content of the cationic surfactant is preferably 5% by mass or less, more preferably 3% by mass or less, further preferably 1% by mass or less, still more preferably 0.5% by mass or less, and further preferably substantially not contained in the total composition, from the viewpoint of suppressing sliminess during washing.

The solubilized skin cleanser composition of the present invention relates to a method for producing a solubilized skin cleanser composition, wherein the following components (A), (B), (C), (D), (E) and (F) are blended, and the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35:

(A) 7-30 mass% of a nonionic surfactant having HLB of 6-18;

(B) the fatty acid salt is 0.1 to 4 mass% in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

The solubilized skin cleanser composition is produced by mixing the ingredients in a usual method. Specific production methods may 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 them at an optional heating temperature; a step 2 of adding the component (B), the component (C) and optionally another oil-soluble component and mixing them at an optional temperature; and a step 3 of adding and mixing the product of the step 2 to the product of the step 1.

From the viewpoint of reducing foaming during mixing, the method preferably includes step 4 of adding a part of component (a) to the product of step 1 and adding the remaining part of component (a) to the product of step 3 and mixing; the method may further comprise step 4 of adding the total amount of the component (A) to the preparation of step 3 without adding the component (A) in step 1 and mixing the mixture.

When the component (D) includes an easily evaporable component having a boiling point of 70 ℃ or higher, for example, a volatile component such as ethanol (component (D)) or a perfume component, it is preferable to include a step 4 of adding the component having a boiling point of 70 ℃ or higher and the volatile component to the preparation product of the step 3 at a low temperature and mixing them.

The low temperature is a temperature at which the above-mentioned components having a boiling point of 70 ℃ or higher and volatile components do not evaporate or volatilize, and is preferably 50 ℃ or lower, more preferably 40 ℃ or lower, and is preferably 10 ℃ or higher, more preferably 20 ℃ or higher from the viewpoint of easy mixing of these components.

The heating in step 1 is optional, and the heating temperature at the time of heating is preferably 10 ℃ or more, more preferably 20 ℃ or more, and preferably 90 ℃ or less, more preferably 85 ℃ or less, from the viewpoint of not boiling water and sufficiently dissolving the aqueous phase component.

The heating in step 2 is optional, and the heating temperature at the time of heating is preferably 50 ℃ or higher, more preferably 55 ℃ or higher, and preferably 90 ℃ or lower, more preferably 85 ℃ or lower, from the viewpoint of sufficiently dissolving the oil-soluble component.

The solubilized skin cleanser composition of the present invention has a pH of preferably 7 to 11, more preferably 7 to 10, further preferably 7 to 9.5, and still more preferably 7.5 to 9.5 at 30 ℃ from the viewpoints of reducing skin irritation and improving bare skin feeling immediately after washing.

In addition, in the production, hydrolysis of the nonionic surfactant is likely to occur during long-term storage in the presence of moisture, free fatty acids are formed, and the pH of the system may gradually decrease, so that the pH is preferably 8 to 11, more preferably 8 to 10, further preferably 8 to 9.5, and still more preferably 8.5 to 9.5.

Here, the pH was measured by the measurement method described in the examples.

From the viewpoint of improving the fusion with makeup soils and improving the solubility of oily mascara, the solubilized skin cleanser composition of the present invention preferably has a viscosity of 300mPa · s or less, more preferably 150mPa · s or less, and still more preferably 80mPa · s or less at 30 ℃; from the viewpoint of suppressing the dripping at the time of coating, it is preferably 5mPa · s or more, more preferably 10mPa · s or more, and further preferably 20mPa · s or more.

In this measurement, a B-type viscometer (TVB-10R-type viscometer, manufactured by Toyobo industries Co., Ltd., measurement conditions: spindle No.1, 60rpm, 60 seconds) was used to measure the viscosity at 30 ℃.

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

The application site of the solubilized skin cleanser composition of the present invention is skin, preferably skin other than scalp, more preferably any site such as face, body, hand and foot, and even more preferably applicable to face.

The solubilized skin cleanser composition of the present invention is suitable as a makeup remover and a cleansing agent that can exhibit the effect of a makeup remover and a cleansing agent that can remove a makeup cosmetic (foundation, mascara, eye shadow, sunscreen, lipstick, etc.) applied to a face, particularly, in a single agent, from the viewpoint that the makeup cosmetic has excellent removability and can provide a bare skin feel after washing as if the cleansing agent were used.

The solubilized skin cleanser composition of the present invention is suitable for makeup removal.

The solubilized skin cleanser composition of the present invention can be used, for example, by applying it to a makeup-applied skin, allowing it to be fused, and then washing it with water. Further, the cosmetic composition can be applied to a cotton pad or the like, and then the skin after color makeup is wiped off and then rinsed.

With respect to the above embodiments, the present invention further discloses the following compositions.

<1> a solubilizing skin cleanser composition comprising the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35:

(A) 7-30 mass% of a nonionic surfactant having HLB of 6-18;

(B) the fatty acid salt is 0.1 to 4 mass% in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

<2> the solubilized skin cleanser composition according to <1> above, wherein the nonionic surfactant of the component (A) preferably has HLB of 7-12.5, more preferably HLB of 8-12.3, and further preferably HLB of 9-12.0.

<3> the solubilized skin cleanser composition according to <1> or <2> above, wherein the nonionic surfactant of component (a) preferably contains 2 or more nonionic surfactants selected from (a1) nonionic surfactants having HLB 6-8, (a2) nonionic surfactants having HLB of more than 13 and 18 or (a3) nonionic surfactants having branched alkyl groups or 2 or more alkyl groups having HLB of more than 8 and 13 or less; more preferably, the nonionic surfactant composition comprises 1 or 2 or more nonionic surfactants having an HLB of more than 13 and not more than 18 selected from (a1) HLB 6-8 and (a2) nonionic surfactants having an HLB of more than 8 and not more than 13 and (a3) branched alkyl group or 2 or more alkyl groups; further preferably contains 1 or more selected from the component (a1), 1 or more selected from the component (a2), and 1 or more selected from the component (a 3).

<4> the solubilizing skin cleanser composition according to <3> above, wherein the nonionic surfactant (a1) having HLB 6-8 preferably contains 1 or 2 or more selected from diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether, more preferably contains 1 or 2 selected from diglycerol isostearate and diglycerol oleate, and still more preferably contains diglycerol isostearate.

<5> the solubilizing skin cleanser composition according to <3> or <4> above, wherein (a2) the nonionic surfactant having an HLB of more than 13 and not more than 18 preferably contains 1 or 2 or more selected from among polyoxyethylene fatty acid esters having an alkyl group with 8 to 18 carbon atoms, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, more preferably contains 1 or 2 or more selected from among polyoxyethylene fatty acid esters and alkyl glucosides, and still more preferably contains 1 or 2 or more selected from among polyoxyethylene (12) monolaurate and decyl glucoside.

<6> the solubilized skin cleanser composition according to any one of the above <3> to <5>, among them, (a3) the nonionic surfactant having a branched alkyl group or 2 or more alkyl groups and having an HLB of more than 8 and 13 or less preferably contains 1 or 2 or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters, more preferably contains 1 or 2 or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, and polyoxyethylene glycerin fatty acid esters, and further preferably contains 1 or 2 or more selected from polyoxyethylene (12) monoisostearate, polyoxyethylene (30) tetraoleate sorbitol, polyoxyethylene (20) sorbitan trioleate, and polyoxyethylene (8) glyceryl monoisostearate.

<7> the solubilized skin cleanser composition according to any one of <3> to <6> above, wherein the component (a) contains 1 or 2 or more selected from the components (a1) and (a2) and the component (a3), and the content ratio of the total of the component (a1) and the component (a2) to the component (a3 [ ((a1) + (a2))/(a3) ] is preferably 3.0 or more, more preferably 4.5 or more, further preferably 5.0 or more, preferably 10 or less, more preferably 9 or less, further preferably 8 or less.

<8> the solubilized skin cleanser composition according to any one of <3> to <7> above, wherein the component (a) comprises the component (a1) and the component (a2), and the content ratio [ (a1)/(a2) ] of the component (a1) to the component (a2) is preferably 0.4 or more, more preferably 0.6 or more, further preferably 0.8 or more, preferably 8 or less, more preferably 2.4 or less, further preferably 1.6 or less.

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

<10> the solubilized skin cleanser composition according to any one of <1> to <9> above, wherein the fatty acid salt of the component (B) is preferably represented by the general formula (1):

R¹-COOM¹…(1)

(in the formula, R¹M represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms¹To representAlkali metals, alkaline earth metals, ammonium from alkanolamines, tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan, or ornithine).

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

<12> the solubilized skin cleanser composition according to any one of <1> to <11> above, wherein the component (B) preferably comprises (B1) a salt selected from fatty acid salts of alkali metals, alkaline earth metals, ammonium and ammonium derived from alkanolamines, and (B2) a salt selected from fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine; more preferably (b1) a salt selected from the group consisting of fatty acid salts of alkali metals, and (b2) a salt selected from the group consisting of fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine; further preferably (b1) a salt selected from the group consisting of fatty acid salts of potassium and sodium, and (b2) a salt selected from the group consisting of fatty acid salts of tris (hydroxymethyl) aminomethane and aminomethylpropanediol; still more preferably (b1) a potassium salt of a fatty acid and (b2) a tris (hydroxymethyl) aminomethane salt of a fatty acid.

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

<14> the solubilized skin cleanser composition according to any one of <1> to <13> wherein the content of the component (B) is preferably 0.6% by mass or more, more preferably 0.9% by mass or more, in terms of fatty acid, in the total composition; preferably 3% by mass or less, more preferably 2% by mass or less.

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

<16> the solubilized skin cleansing composition according to any one of <1> to <15>, wherein the oil agent of the component (C) preferably comprises (C1) an oil agent having a viscosity of 15mPa · s or less at 30 ℃, more preferably comprises 1 or 2 or more selected from hydrocarbon oils, ether oils and silicone oils, more preferably comprises 1 or 2 or more selected from hydrocarbon oils and ether oils, and further preferably comprises at least a hydrocarbon oil.

<17> the solubilized skin cleanser composition according to <16> above, wherein the content mass ratio [ (C1)/C) ] of the component (C1) in the component (C) is preferably 0.5 or more, more preferably 0.6 or more, further preferably 0.7 or more, and preferably 0.99 or less, more preferably 0.97 or less, further preferably 0.93 or less.

<18> the solubilized skin cleanser composition according to any one of <1> to <17> above, wherein the oil agent of the component (C) preferably contains (C2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms and 1 or 2 or more selected from hexyldecanol, isostearyl alcohol and octyldodecanol, more preferably 1 or 2 selected from isostearyl alcohol and octyldodecanol, and still more preferably isostearyl alcohol.

<19> the solubilized skin cleanser composition according to <18> above, wherein the content mass ratio [ (C2)/(C) ] of the component (C2) in the component (C) is preferably 0.01 or more, more preferably 0.03 or more, further preferably 0.07 or more, and preferably 0.30 or less, more preferably 0.25 or less, further preferably 0.22 or less.

<20> the solubilized skin cleanser composition according to any one of <1> to <19> above, wherein the content of the component (C) is preferably 7% by mass or more, more preferably 9% by mass or more, further preferably 10% by mass or more, preferably 16% by mass or less, more preferably 14% by mass or less, further preferably 12% by mass or less in the total composition.

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

<22> the solubilized skin cleanser composition according to any one of <1> to <21> above, wherein the water-soluble solvent of the component (D) is preferably 1 or 2 or more selected from monohydric alcohols and polyhydric alcohols; more preferably 1 or 2 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol, isoprene glycol and diglycerin, and still more preferably 1 or 2 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol and isoprene glycol.

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

<24> the solubilized skin cleanser composition according to any one of <1> to <23> above, wherein the content ratio [ (D)/(F) ] of the component (D) to the component (F) is preferably 0.5 or more, more preferably 1.0 or more, further preferably 1.2 or more, and preferably 4 or less, more preferably 2 or less, further preferably 1.8 or less.

<25> the solubilized skin cleanser composition according to any one of <1> to <24> wherein the component (E) is a base selected from the group consisting of tris (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 it is present in the composition in the form of a free form.

<26> the solubilized skin cleanser composition according to any one of <1> to <25> above, wherein the base of the component (E) preferably contains 1 or 2 or more selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine, more preferably contains 1 or 2 or more selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol and aminomethylpropanediol, further preferably contains 1 or 2 selected from the group consisting of tris (hydroxymethyl) aminomethane and aminomethylpropanediol, and still more preferably contains tris (hydroxymethyl) aminomethane.

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

<28> the solubilized skin cleanser composition according to any one of <1> to <27> above, wherein the content of the component (E) is preferably 0.5% by mass or more, more preferably 0.8% by mass or more, and preferably 4% by mass or less, more preferably 3.5% by mass or less, of the total composition.

<29> the solubilized skin cleanser composition according to any one of <1> to <28> above, wherein the content of water of the component (F) is preferably 10% by mass or more, more preferably 15% by mass or more, and preferably 35% by mass or less, more preferably 30% by mass or less, in the total composition.

<30> the solubilized skin cleanser composition according to any one of <1> to <29>, which further comprises (G) an anionic surfactant other than the component (B), preferably 1 or 2 or more selected from alkyl sulfate, alkyl ether sulfate, ether carboxylate and N-acyl glutamate, more preferably 1 or 2 or more selected from alkyl ether sulfate and ether carboxylate.

<31> the solubilized skin cleanser composition according to <30> above, wherein the alkyl ether sulfate is preferably represented by the following general formula (2):

R²O(CH₂CH₂O)_nSO₃M²…(2)

(in the formula (2), R²An aliphatic hydrocarbon group having 8 to 22 carbon atoms; m²Is selected fromCations of alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium and glucammonium; n represents an average addition mole number and is 0.5 to 20); preferably, the composition contains 1 or more selected from the group consisting of sodium polyoxyethylene (1) lauryl ether sulfate, ammonium polyoxyethylene (1) lauryl ether sulfate, and sodium polyoxyethylene (2) lauryl ether sulfate.

<32> the solubilized skin cleanser composition according to <30> above, wherein the ether carboxylic acid or its salt is preferably represented by the following general formula (3):

R³O(CH₂CH₂O)_mCH₂COOM³…(3)

(in the formula (3), R³Represents an alkyl group or alkenyl group having 10 to 22 carbon atoms; m represents an average addition mole number and is a number of 0.5 to 10; m³Represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or an organic ammonium); preferably 1 or 2 or more selected from polyoxyethylene lauryl ether carboxylic acid or a salt thereof, polyoxyethylene myristyl ether carboxylic acid or a salt thereof, and polyoxyethylene palmityl ether carboxylic acid or a salt thereof, more preferably 1 or 2 selected from polyoxyethylene lauryl ether carboxylic acid or a salt thereof, and further preferably polyoxyethylene lauryl ether carboxylic acid or a salt thereof.

<33> the solubilized skin cleanser composition according to any one of <30> to <32> above, wherein the component (B) and the component (G) are preferably used in combination; the content ratio [ (B)/((B) + (G)) ] of the component (B) to the total amount of the component (B) and the component (G) is preferably 0.1 or more, more preferably 0.2 or more, further preferably 0.3 or more, preferably 1 or less, more preferably 0.9 or less, further preferably 0.7 or less.

<34> the solubilized skin cleanser composition according to any one of <30> to <33> above, wherein the component (B) and the component (G) are preferably used in combination; the content ratio of the total amount of the component (B) and the component (G) [ ((B) + (G)/(a) ] to the component (a) is preferably 0.11 or more, more preferably 0.12 or more, further preferably 0.14 or more, preferably 0.70 or less, more preferably 0.60 or less, further preferably 0.45 or less.

<35> the solubilized skin cleanser composition according to any one of <1> to <34> above, which preferably further comprises (H) an organic acid; it is preferably 1 or 2 or more selected from hydroxycarboxylic acids and dicarboxylic acids, and more preferably 1 or more selected from dicarboxylic acids.

<36> the solubilizing skin cleanser composition according to <35> above, wherein the content of the component (H) is preferably 0.3% by mass or less, more preferably 0.01 to 0.2% by mass, in the total composition.

<37> the solubilized skin cleanser composition according to any one of <1> to <36> above, wherein the cationic surfactant is contained in an amount of preferably 5% by mass or less, more preferably 3% by mass or less, further preferably 1% by mass or less, still more preferably 0.5% by mass or less, and further preferably substantially not contained in the total composition.

<38> the solubilized skin cleanser composition according to any one of <1> to <37> above, wherein the pH is preferably 7 to 11, more preferably 7 to 10, further preferably 7 to 9.5, and further preferably 7.5 to 9.5 at 30 ℃.

<39> the solubilized skin cleanser composition according to any one of <1> to <38> above, wherein the pH is preferably 8 to 11, more preferably 8 to 10, further preferably 8 to 9.5, and further preferably 8.5 to 9.5 at the time of production.

<40> the solubilized skin cleanser composition according to any one of <1> to <39> above, wherein the viscosity at 30 ℃ is preferably 300 mPas or less, more preferably 150 mPas or less, and still more preferably 80 mPas or less; preferably 5 mPas or more, more preferably 10 mPas or more, and still more preferably 20 mPas or more.

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

<42> the solubilized skin cleanser composition according to any one of <1> to <41> above, wherein the area to be applied is preferably skin, more preferably skin other than scalp, further preferably any area such as face, body, hand and foot, and even more preferably applicable to face.

<43> the solubilizing skin cleanser composition according to any one of <1> to <42> which is applied to a skin made of color cosmetics, fused thereto, and then rinsed with water for use.

<44> a solubilizing skin cleanser composition which is obtained by blending the following components (A), (B), (C), (D), (E) and (F) in such a manner that the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35:

(A) 7-30 mass% of a nonionic surfactant having HLB of 6-18;

(B) the fatty acid salt is 0.1 to 4 mass% in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

<45> a method for producing a solubilizing skin cleanser composition, which comprises blending the following components (A), (B), (C), (D), (E) and (F) and has a content ratio (B)/(A) of 0.06 to 0.35:

(A) 7-30 mass% of a nonionic surfactant having HLB of 6-18;

(B) the fatty acid salt is 0.1 to 4 mass% in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

<46> the method for manufacturing the solubilized skin cleanser composition as stated in <45> above, comprising: step 1 of adding component (A), component (D), component (E), component (F), optional component (H), component (G) and other water-soluble components and mixing them at an optional heating temperature; a step 2 of adding the component (B), the component (C) and optionally another oil-soluble component and mixing them at an optional temperature; and a step 3 of adding and mixing the product of the step 2 to the product of the step 1.

<47> a solubilizing skin cleanser composition comprising the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio of component (B) to component (A) (B)/(A) is 0.06-0.35, and the pH at 30 ℃ is 7-11:

(A) a nonionic surfactant containing 2 or more nonionic surfactants selected from (a1) nonionic surfactants having HLB6 to 8, (a2) nonionic surfactants having HLB of more than 13 and not more than 18, and (a3) nonionic surfactants having branched alkyl groups or 2 or more alkyl groups and HLB of more than 8 and not more than 13, and the HLB at the time of mixing is 6 to 18 and 7 to 30 mass%;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, alkaline earth metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from 1 or 2 or more fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

<48> a solubilizing skin cleanser composition comprising the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35, and the content molar ratio [ (B1)/(B2) ] of the component (B) (B1) to the component (B2) is 0.3 to 2.5:

(A) a nonionic surfactant containing (a1) 1 or 2 or more nonionic surfactants selected from the group consisting of HLB6 to 8, (a2) 1 or 2 or more nonionic surfactants selected from the group consisting of nonionic surfactants having HLB of more than 13 and 18 or less, and (a3) a nonionic surfactant having branched alkyl group or 2 or more alkyl groups and having HLB of more than 8 and 13 or less, and having HLB of 6 to 18 and 7 to 30 mass% when mixed;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, alkaline earth metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from the group consisting of 1 or 2 fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine;

(F) 5 to 40 mass% of water.

<49> a solubilizing skin cleanser composition comprising the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06-0.35; the component (B) is a component (B1) in which the content molar ratio [ (B1)/(B2) ] to the component (B2) is 0.3 to 2.5; the content molar ratio [ (B)/(E) ] of the component (B) to the component (E) is 0.05-7:

(A) a nonionic surfactant comprising (a1) 1 or more than 2 nonionic surfactants having HLB 6-8 selected from diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether; (a2) 1 or 2 or more selected from among polyoxyethylene fatty acid esters having an alkyl group of 8 to 18 carbon atoms, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, and 1 or 2 or more selected from among polyoxyethylene fatty acid esters and alkyl glucosides, nonionic surfactants having an HLB of greater than 13 and not more than 18; and (a3) 1 or more or 2 or more nonionic surfactants having a branched alkyl group or 2 or more alkyl groups and an HLB of more than 8 and 13 or less selected from among polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters, and the HLB at the time of mixing is 6 to 18 and 7 to 30 mass%;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from 1 or 2 or more fatty acid salts of tris (hydroxymethyl) aminomethane and aminomethylpropanediol, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5 to 20 mass% of an oil agent comprising (c1) an oil agent having a viscosity of 15 mPas or less at 30 ℃ and (c2) a branched saturated or unsaturated alcohol having 15 or more carbon atoms;

(D) 10-60 mass% of a water-soluble solvent having an IOB value of 1.5-6.0;

(E) 0.1 to 6 mass% of 1 or 2 bases selected from tris (hydroxymethyl) aminomethane and aminomethylpropanediol;

(F) 5 to 40 mass% of water.

<50> a solubilizing skin cleansing composition which comprises the following components (A), (B), (C), (D), (E) and (F) and which has a content ratio (B)/(A) of the component (B) to the component (A) of 0.06 to 0.35 and a pH at 30 ℃ of 7 to 11:

(A) a nonionic surfactant containing 2 or more nonionic surfactants selected from (a1) nonionic surfactants having HLB6 to 8, (a2) nonionic surfactants having HLB of more than 13 and not more than 18, and (a3) nonionic surfactants having branched alkyl groups or 2 or more alkyl groups and HLB of more than 8 and not more than 13, and the HLB at the time of mixing is 6 to 18 and 7 to 30 mass%;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, alkaline earth metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from 1 or 2 or more fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

<51> a solubilizing skin cleanser composition comprising the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35, and the content molar ratio [ (B1)/(B2) ] of the component (B) (B1) to the component (B2) is 0.3 to 2.5:

(A) a nonionic surfactant containing (a1) 1 or 2 or more nonionic surfactants selected from the group consisting of HLB6 to 8, (a2) 1 or 2 or more nonionic surfactants selected from the group consisting of nonionic surfactants having HLB of more than 13 and not more than 18, and (a3) a nonionic surfactant having a branched alkyl group or 2 or more alkyl groups and having HLB of more than 8 and not more than 13, and having HLB of 6 to 18 and 7 to 30 mass% when mixed;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, alkaline earth metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from 1 or 2 or more fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine;

(F) 5 to 40 mass% of water.

<52> a solubilizing skin cleanser composition which is obtained by blending the following components (A), (B), (C), (D), (E) and (F) in such a manner that the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35, the content molar ratio [ (B1)/(B2) ] of the component (B1) to the component (B2) is 0.3 to 2.5, and the content molar ratio (B)/(E) of the component (B) to the component (E) is 0.05 to 7:

(A) a nonionic surfactant comprising (a1) 1 or more than 2 nonionic surfactants having HLB 6-8 selected from diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether; (a2) 1 or 2 or more selected from among polyoxyethylene fatty acid esters having an alkyl group of 8 to 18 carbon atoms, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters, and alkyl glucosides, and 1 or 2 or more selected from among polyoxyethylene fatty acid esters and alkyl glucosides, nonionic surfactants having an HLB of greater than 13 and not more than 18; and (a3) 1 or more or 2 or more nonionic surfactants having a branched alkyl group or 2 or more alkyl groups and an HLB of more than 8 and 13 or less selected from among polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers, and polyoxyethylene glycerin fatty acid esters, and the HLB at the time of mixing is 6 to 18 and 7 to 30 mass%;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from the group consisting of 1 or 2 fatty acid salts of tris (hydroxymethyl) aminomethane and aminomethylpropanediol, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5 to 20 mass% of an oil agent comprising (c1) an oil agent having a viscosity of 15 mPas or less at 30 ℃ and (c2) a branched saturated or unsaturated alcohol having 15 or more carbon atoms;

(D) 10-60 mass% of a water-soluble solvent having an IOB value of 1.5-6.0;

(E) 0.1 to 6 mass% of 1 or 2 bases selected from tris (hydroxymethyl) aminomethane and aminomethylpropanediol;

(F) 5 to 40 mass% of water.

<53> a method for producing a solubilizing skin cleanser composition, which comprises blending the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35:

(A) a nonionic surfactant containing 2 or more nonionic surfactants selected from (a1) nonionic surfactants having HLB6 to 8, (a2) nonionic surfactants having HLB of more than 13 and not more than 18, and (a3) nonionic surfactants having branched alkyl groups or 2 or more alkyl groups and HLB of more than 8 and not more than 13, and the HLB at the time of mixing is 6 to 18 and 7 to 30 mass%;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, alkaline earth metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from 1 or 2 or more fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine;

(F) 5 to 40 mass% of water.

<54> a method for producing a solubilized skin cleanser composition, which comprises blending the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35, and the content molar ratio [ (B1)/(B2) ] of the component (B1) to the component (B2) is 0.3 to 2.5:

(A) a nonionic surfactant containing 1 or 2 or more nonionic surfactants selected from (a1) HLB 6-8, (a2) 1 or 2 or more nonionic surfactants selected from nonionic surfactants having HLB of more than 13 and 18 or less, and (a3) a nonionic surfactant having branched alkyl group or 2 or more alkyl groups and HLB of more than 8 and 13 or less, and having HLB of 6-18 and 7-30 mass% when mixed;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, alkaline earth metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from 1 or 2 or more fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5-20 mass% of an oil agent;

(D) 10-60 mass% of a water-soluble solvent;

(E) 0.1 to 6 mass% of a base selected from the group consisting of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine;

(F) 5 to 40 mass% of water.

<55> a method for producing a solubilized skin cleanser composition, which comprises blending the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of the component (B) to the component (A) is 0.06 to 0.35, the content molar ratio [ (B1)/(B2) ] of the component (B1) to the component (B2) is 0.3 to 2.5, and the content molar ratio [ (B)/(E) ] of the component (B) to the component (E) is 0.05 to 7:

(A) a nonionic surfactant comprising (a1) 1 or 2 or more nonionic surfactants having HLB 6-8 selected from diglyceryl isostearate, diglyceryl oleate and isostearyl glyceryl ether, (a2) 1 or 2 or more nonionic surfactants selected from polyoxyethylene fatty acid esters having alkyl group of 8-18 carbon atoms, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters and alkyl glucosides, 1 or 2 or more nonionic surfactants selected from 1 or 2 or more nonionic surfactants having HLB of more than 13 and not more than 18 selected from polyoxyethylene fatty acid esters and alkyl glucosides, and (a3) 1 or 2 or more nonionic surfactants having branched alkyl group or 2 or more alkyl group having HLB of more than 8 and not more than 13 selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters A surfactant, wherein the HLB during mixing is 6 to 18 and 7 to 30 mass%;

(B) a fatty acid salt containing 1 or 2 or more fatty acid salts (b1) selected from alkali metal, ammonium, and ammonium derived from alkanolamine; and (b2) a salt selected from 1 or 2 or more fatty acid salts of tris (hydroxymethyl) aminomethane and aminomethylpropanediol, in an amount of 0.1 to 4% by mass in terms of fatty acid;

(C) 5 to 20 mass% of an oil agent comprising (c1) an oil agent having a viscosity of 15 mPas or less at 30 ℃ and (c2) a branched saturated or unsaturated alcohol having 15 or more carbon atoms;

(D) 10-60 mass% of a water-soluble solvent having an IOB value of 1.5-6;

(E) 0.1 to 6 mass% of 1 or 2 bases selected from tris (hydroxymethyl) aminomethane and aminomethylpropanediol;

(F) 5 to 40 mass% of water.

[ examples ]

Examples 1 to 36 and comparative examples 1 to 9

Solubilized skin cleanser compositions having the compositions shown in tables 1 to 4 were produced and evaluated for appearance immediately after production, pH immediately after production, temperature stability immediately after production (solubilization temperature range), solubility of oily mascara, washing speed, bare skin feel immediately after washing, and temperature stability after long-term storage (solubilization temperature range). In addition, examples 27 to 36 were evaluated for the degree of pain when entering the eyes. The results are shown in tables 1 to 4. The contents shown in the table are all expressed as effective amounts.

The following materials were used as the labeling components shown in the table.

*1: PARLEAM4 (viscosity 5.9 mPas manufactured by Nichiya oil Co., Ltd.)

*2: KALCOL 200GD (manufactured by Kao corporation, viscosity 41.7 mPa. multidot.s)

*3: AMISOFT LA-D (manufactured by Ajinomoto HEALTUY SUPPLY Co., Ltd.)

*4: AMISOFT HA-P (manufactured by Ajinomoto HEALTUY SUPPLY Co., Ltd.)

*5: AMISOFT CK-22 (manufactured by Ajinomoto HEALTUY SUPPLY Co., Ltd.)

*6: AMISOFT MK-11 (manufactured by Ajinomoto HEALTUY SUPPLY Co., Ltd.)

*7: AKYPO LM-26SD (manufactured by Huawang company)

*8: AG-10LK (HLB 17, manufactured by Huawang Co.)

*9: EMANON 1112 (HLB 13.7 manufactured by Huawang Co.)

*10: COSMOL41V (HLB 8 manufactured by Nisshin OilliO Group Co., Ltd.)

*11: RHEODOL 430V (HLB 10.5, manufactured by Huawang Co., Ltd.)

(production method)

Step 1: the components 23 to 25 and the component 27 were added to the component 29, and the mixture was uniformly mixed at 25 ℃ and 200 rpm.

And a step 2: the ingredients 10 to 18 were added to the product obtained in step 1, and the mixture was uniformly mixed at 25 ℃ and 200 rpm.

Step 3: mixing the components 1-9, and heating and dissolving at 80 ℃ under stirring.

And step 4: the preparation of step 3 was added to the preparation of step 2, and the mixture was cooled to 30 ℃ under stirring.

Step 5: ingredients 19 to 22, 26 and 28 were added to the preparation in step 4, and the mixture was uniformly mixed at 200rpm to obtain a solubilized skin cleanser composition.

(evaluation method)

(1) Appearance immediately after production:

immediately after production, 40mL of each skin cleanser composition was put into a 50mL sample bottle (manufactured by Tokyo Nitri apparatus Co.: Standard bottle #6) and evaluated as any of transparent, translucent, white turbid, separated and precipitated by visual observation.

In this case, the transparent, translucent, and white-turbid are plates in which a bar code having a width in the range of 0.4 to 1.0mm between bars and a space and a number having a size of four directions of 2.0mm are printed in black on the side surface of the sample bottle, and when the side surface is visually observed from the opposite side, the determination is performed as follows based on the recognition of the bar code and the number.

"transparent" is a state in which lines and numbers of the bar code can be clearly recognized.

"translucent" is a state in which a line recognized as a bar code is set but a number is not recognized.

The "white turbidity" is a state in which the lines and numerals of the barcode cannot be recognized.

The skin cleanser composition was identified as having a phase separation or a content deposition.

(2) pH immediately after production

Immediately after production, each stock solution of the skin cleansing compositions was measured at 30 ℃ by a pH meter (horiba, Ltd.; desk type pH/Water quality Analyzer LAQUA F-72T). At this time, the stirring was slowly continued for 15 minutes until the value was stable, and the stable value after the stirring was measured.

(3) Temperature stability immediately after production (solubilization temperature region):

(3-1) determination of the cloud Point:

a50 mL sample bottle (manufactured by Tokyo Nitri apparatus Co., Ltd.: Standard bottle #6) was charged with 30mL of each skin cleanser composition and a stirrer, and the mixture was heated in a 70 ℃ water bath until cloudiness occurred. And thereafter removed from the water bath. The sample bottle was cooled under stirring with a stirrer on a stirrer at 350rpm under an environment of 25 ℃. Herein, the temperature at which the film becomes transparent to translucent is set as the haze point.

(3-2) determination of solubilization Limit Point:

40mL of each skin cleanser composition was put into a 50mL sample bottle (manufactured by Tokyo Nitri apparatus Co., Ltd.: Standard bottle #6), and stored in a thermostatic bath at 5 ℃ and 0 ℃ and-5 ℃ for 12 hours. Thereafter, the appearance was visually observed at each temperature, and the film was evaluated as transparent, translucent, white turbid, 2-layer separated, and precipitated. The lowest value among the temperatures at which the transparent to translucent appearance can be maintained was used as the solubilization limit point.

(4) Solubility of oily mascara:

a water-repellent Mascara (Magnebelline, Magnum volume Mascara water-repellent type) was uniformly applied in a round shape having a diameter of 12mm to a glass plate (manufactured by MICRO SLIDE GLASS, MATSUNAMI) in an amount of 3 g. After drying for 8 hours, 0.03g of each skin cleanser composition was dropped and fused with a fingertip at a speed of 1 circle per second with a pressing force of about 100 g. After 50-cycle fusion, the extent of mascara dissolution and the extent of mascara remaining were observed and evaluated according to the following criteria.

(criteria for determination)

5: the mascara was completely dissolved (no mascara remained on the glass plate).

4: the mascara was almost dissolved (less than 10% of the mascara remained on the glass plate).

3: the mascara half-dissolved (more than 10% to 50% of mascara remained on the glass plate).

2: the mascara was dissolved in a small amount (more than 50% to 90% of the mascara remained on the glass plate).

1: the mascara was hardly dissolved (more than 90% of the mascara remained on the glass plate).

(5) Speed of cleaning

Each skin cleanser composition was actually applied to the face and the agent was washed by 5 persons, a professional panelist. The cleansing agent (Biore Skin Care cleansing agent, manufactured by kao corporation) was used as an evaluation index, and the cleansing rate was evaluated from the rate at which each Skin cleanser composition became non-greasy when cleansed to the same number of people as the cleansing agent.

(evaluation criteria)

5: 5 of the 5 people all rated a rapid wash.

4: of the 5, 4 evaluated as fast washes.

3: 3 of 5 evaluated as fast washes.

2: 2 of 5 evaluated as fast washes.

1: among 5 persons, 1 person or less was evaluated as a rapid washing.

(6) Bare skin sensation immediately after washing

Each skin cleanser composition was actually applied to the face and the agent was washed by 5 persons, a professional panelist. As an evaluation index, a cleanser (bio Skin Care cleanser, manufactured by kao corporation) was used, and the bare Skin feel immediately after washing was evaluated from the number of people who felt the Skin as clean (bare Skin feel) after washing (the Skin was still wet before wiping with a towel).

(evaluation criteria)

5: all 5 of 5 were evaluated as feeling bare muscle.

4: among 5 persons, 4 persons were evaluated as feeling bare muscle sensation.

3: 3 of 5 persons evaluated as feeling bare muscle.

2: 2 of 5 persons evaluated as feeling bare muscle.

1: among 5 persons, 1 person was evaluated as feeling a bare muscle feeling below.

(7) Temperature stability after Long-term storage (solubilization temperature region)

The temperature stability after long-term storage was evaluated. Specifically, in order to accelerate deterioration, 180mL of each skin cleanser composition was put into a PET container (AL-CL 06A case 200M NB527C Oil, manufactured by Giye industries, Ltd.), stored at 50 ℃ for one month, and then the haze point was measured in the same manner as in (3-1) above. In addition, the solubilization limit point was measured in the same manner as in (3-2) after accelerating the degradation.

(8) Degree of pain upon entry into the eye

The degree of pain upon entering the eyes was evaluated by 3 professional panelists, who fused each skin cleanser composition with eyelashes centered around the eyes for 20 seconds, opened the eyes and blinked 10 times, assuming a case of removing mascara. The average of the evaluation scores was determined by setting the pain hardly felt to 4 scores, the pain extremely slightly felt to 3 scores, the slight pain felt to 2 scores, and the weak pain felt to 1 score, and the degree of pain when entering the eyes was evaluated. Further, when a cleanser (Biore Skin Care cleanser, manufactured by Kao corporation) was used, very intense pain was felt.

Claims (11)

1. A solubilized skin cleanser composition wherein, The solubilized skin cleanser composition contains the following components (A), (B), (C), (D), (E) and (F), and the content of the component (B) relative to the component (A) The ratio (B)/(A) is 0.06 to 0.35: (A) 7-30 mass % of nonionic surfactants of HLB6-18; (B) The fatty acid salt is 0.1 to 4 mass % in terms of fatty acid; (C) 5-20 mass % of oil; (D) 10-60 mass % of water-soluble solvent; (E) 0.1-6 bases selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine quality%; (F) Water 5-40 mass %. 2. The solubilized skin cleanser composition of claim 1 wherein, The component (C) contains: (c1) an oil agent whose viscosity at 30°C is 15 mPa·s or less. 3. The solubilized skin cleanser composition of claim 1 or 2, wherein, The component (C) contains: (c2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms. 4. The solubilized skin cleanser composition according to any one of claims 1 to 3, wherein Component (A) is a nonionic surfactant selected from (a1) HLB6 to 8, (a2) a nonionic surfactant with HLB greater than 13 and 18 or less, and (a3) a branched alkyl group or 2 or more alkanes Two or more kinds of nonionic surfactants among the nonionic surfactants whose HLB of the group is more than 8 and 13 or less. 5. The solubilized skin cleanser composition according to any one of claims 1 to 4, wherein The content molar ratio (B)/(E) of the component (B) to the component (E) is 7 or less. 6. The solubilized skin cleanser composition according to any one of claims 1 to 5, wherein Component (B) contains: (b1) a fatty acid salt selected from potassium salts and sodium salts of fatty acids, and (b2) a fatty acid salt selected from tris(hydroxymethyl)aminomethane salts and aminomethylpropanediol salts of fatty acids , and the content mass ratio (b1)/(b2) of the component (b1) to the component (b2) is 0.3 to 2.5. 7. The solubilized skin cleanser composition according to any one of claims 1 to 6, wherein It is pH 7-11 at 30 degreeC. 8. The solubilized skin cleanser composition according to any one of claims 1 to 7, wherein Component (A) is a fatty acid ester. 9. A solubilized skin cleanser composition wherein, The solubilized skin cleanser composition is formulated with the following components (A), (B), (C), (D), (E) and (F), and the component (B) is set relative to the component (A) The content ratio (B)/(A) of 0.06 to 0.35 is obtained: (A) 7-30 mass % of nonionic surfactants of HLB6-18; (B) The fatty acid salt is 0.1 to 4 mass % in terms of fatty acid; (C) 5-20 mass % of oil; (D) 10-60 mass % of water-soluble solvent; (E) 0.1-6 bases selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine quality%; (F) Water 5-40 mass %. 10. A method for producing a solubilized skin cleanser composition, wherein, The manufacturing method of the said solubilized skin cleanser composition blends the following components (A), (B), (C), (D), (E) and (F), and sets the component (B) relative to the component ( The content ratio (B)/(A) of A) is 0.06 to 0.35: (A) 7-30 mass % of nonionic surfactants of HLB6-18; (B) The fatty acid salt is 0.1 to 4 mass % in terms of fatty acid; (C) 5-20 mass % of oil; (D) 10-60 mass % of water-soluble solvent; (E) 0.1-6 bases selected from tris(hydroxymethyl)aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine quality%; (F) Water 5-40 mass %. 11. Use of the solubilized skin cleanser composition of any one of claims 1 to 9 as a makeup remover.