CN112236125B

CN112236125B - Solubilized skin cleanser composition

Info

Publication number: CN112236125B
Application number: CN201980038272.1A
Authority: CN
Inventors: 大槻祐太; 津田博子; 山田晃平; 田岛准
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2018-06-12
Filing date: 2019-06-10
Publication date: 2023-07-14
Anticipated expiration: 2039-06-10
Also published as: CN112236125A; JP2019214564A; TWI808194B; TW202000179A; JP7303032B2; WO2019240067A1

Abstract

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

Description

Solubilized skin cleanser composition

Technical Field

The present invention relates to solubilized skin cleanser compositions.

Background

It is known that solid oil components contained in make-up dirt such as waterproof mascara, which is difficult to remove, are dissolved by an oil solution and removed. Therefore, cosmetics containing an oil for cleansing have been marketed in various formulations such as creams, gels, and liquids (liquids).

These formulations are typically made by combining nonionic surfactants appropriately for the purpose of rinsing the oil in which the soil is dissolved. However, a preparation simply comprising an oil and a nonionic surfactant has a problem that the preparation is not refreshing due to the sliminess during cleaning or the residual oil after washing. Therefore, many consumers further clean the makeup by a cleanser such as a cleanser after removing the makeup.

For example, patent document 1 describes a makeup removing composition containing a nonionic surfactant having a specific HLB, a low viscosity oil agent, and a water-soluble solvent, which is excellent in makeup cleaning ability and can be rinsed clean. However, although the cleansing composition can be rinsed without being greasy, it does not give a refreshing feeling such as a feeling of thoroughly cleaning skin by a cleanser.

In addition, there have been studied makeup removing compositions in which a nonionic surfactant, an oil agent and a polyhydric alcohol are combined with an anionic surfactant (patent documents 2 and 3), and the anionic surfactant has an effect of improving the detergency of the composition, but it is not possible to impart a clean skin feel to the skin after washing.

Further, patent document 4 describes a cleansing composition which imparts a refreshing feel by combining an anionic surfactant with a silicone nonionic surfactant and silicone oil. However, when an anionic surfactant and a nonionic surfactant are present together, the limitation of the optional surfactants is large from the viewpoint of long-term stability, and a composition giving a feeling of thorough cleaning like a cleansing surface while maintaining sufficient stability cannot be obtained.

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

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

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

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

Disclosure of Invention

The present invention relates to a solubilized skin cleansing 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 to 30 mass% of a nonionic surfactant having an HLB of 6 to 18;

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

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

(F) 5 to 40 mass percent of water.

Detailed Description

The present invention is to solubilize a makeup, 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 exert the cleansing power of the oil agent when applied to the skin. Further, the object is to obtain a detergent composition which can be rinsed quickly without being greasy during rinsing and which leaves a thoroughly clean skin feel on the skin due to the formation of a fatty acid salt film (scum) and which can actually feel a skin feel like washing with a cleanser.

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

The present inventors have found that a solubilized skin cleansing composition which comprises a specific nonionic surfactant, a fatty acid salt, an oil, a water-soluble solvent, a specific alkali and water, and wherein the specific nonionic surfactant and the fatty acid salt are used in combination in a specific ratio, has excellent long-term storage stability, is Gao Qingjie-force, is not greasy during rinsing, and can be quickly washed, and gives a fresh touch to the skin after washing.

The solubilized skin cleansing composition of the present invention has high cleansing power, is not greasy and can be rapidly washed when rinsed, can impart a refreshing feel to the skin after washing like cleansing with a cleanser, and is excellent in long-term storage stability. In addition, the feeling of irritation to eyes is also improved.

In the present invention, the term "solubilizing" means that the thermodynamics of the oil and water phase components dissolved in each other by the surfactant is a stable liquid phase, and the liquid phase shows a transparent to translucent appearance.

In the solubilized skin cleansing composition of the present invention, a solubilization system is mainly constituted by using a nonionic surfactant and an anionic surfactant, but since HL (hydrophilicity-hydrophobicity) balance of the nonionic surfactant changes with temperature, cloud points appear on the high temperature side and solubilization limit points appear on the low temperature side in the solubilized composition. The region between this cloud point and the solubilization limit point is referred to as the solubilization temperature region, and expansion of this temperature region will result in expansion of the stable temperature region of the resulting solubilization composition, while increasing the amount of solubilization of the oil dose.

As the solubilized product, it is important that the appearance does not change in the actual use temperature range, and it is preferable that the solubilized state is maintained in the temperature range of 0 to 40 ℃ in order to withstand the actual use. Further, if taking into consideration the storage conditions, it is more preferable to keep 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) acts together with the fatty acid salt of the component (B) to solubilize the oil agent of the component (C).

Herein, HLB (hydrophilic-lipophilic balance) is calculated from the formula (J, soc, comet, chem.,1,311 (1949); 5,249 (1953)) of Griffin (Griffin).

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

Further, from the viewpoint of being a cleaner which is milder to the skin, it is preferably a fatty acid ester, more preferably at least 1 selected from the group consisting of glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester and polyoxyethylene sorbitan fatty acid ester.

The nonionic surfactant of the component (a) may be used in an amount of 1 or 2 or more in combination, and when 2 or more nonionic surfactants are combined, the HLB in mixing them must be within the above range.

The HLB at the time of mixing 2 or more nonionic surfactants is obtained by adding the HLB values of the nonionic surfactants according to their mixing ratios and averaging them, and is obtained as follows. The HLB at the time of mixing 2 or more nonionic surfactants is set to the above-mentioned HLB range.

Hlb=Σ (hlbx×wx)/Σwx at the time of mixing

HLBx represents the HLB value of the nonionic surfactant X.

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

The nonionic surfactant of the component (a) is preferably a mixture of 2 or more nonionic surfactants having different HLB from the viewpoint of increasing the solubilization amount of the oil and expanding the solubilization temperature region, and preferably contains: 2 or more nonionic surfactants selected from the group consisting of (a 1) nonionic surfactants having an HLB of 6 to 8, (a 2) nonionic surfactants having an HLB of more than 13 and not more than 18, and (a 3) nonionic surfactants having a branched alkyl group or 2 or more alkyl groups having an HLB of more than 8 and not more than 13; more preferably, the composition comprises: 1 or 2 or more nonionic surfactants selected from (a 1) nonionic surfactants having an HLB of 6 to 8 and (a 2) nonionic surfactants having an HLB of more than 13 and not more than 18, and (a 3) nonionic surfactants having a branched alkyl group or more than 2 alkyl groups and having an HLB of more than 8 and not more than 13; further preferably, the composition comprises: 1 or more selected from the group consisting of component (a 1), 1 or more selected from the group consisting of component (a 2), and 1 or more selected from the group consisting of component (a 3).

Examples of the nonionic surfactant having an HLB of 6 to 8 include polyglyceryl fatty acid esters such as diglyceryl oleate and diglyceryl isostearate; polyglycerol alkyl ethers such as diglycerol 2-ethylhexyl ether and isostearyl glycerol ether; polyethylene glycol fatty acid esters such as polyethylene glycol (5) monostearate, and the like.

Among these, from the viewpoint of further expanding the solubilization temperature region, it is preferable to contain 1 or 2 or more species selected from the group consisting of diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether, more preferably 1 or 2 species selected from the group consisting of diglycerol isostearate and diglycerol oleate, and still more preferably diglycerol isostearate.

Examples of the nonionic surfactant having an HLB of greater than 13 and 18 or less 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 glycerol fatty acid esters such as polyoxyethylene (20) glycerol monostearate; sucrose fatty acid esters such as sucrose stearate; alkyl polyglucosides such as decyl glucoside.

Among these, from the viewpoint of expanding the solubilization temperature region more, 1 or 2 or more selected from the group consisting of polyoxyethylene fatty acid esters having an alkyl group having 8 to 18 carbon atoms, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerol fatty acid esters and alkyl glucosides are preferably contained, 1 or 2 or more selected from the group consisting of polyoxyethylene fatty acid esters and alkyl glucosides are more preferably contained, and 1 or 2 selected from the group consisting of polyoxyethylene (12) monolaurate and decyl glucoside are more preferably contained.

(a3) Among 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, branched alkyl groups having 8 to 18 carbon atoms are preferable, and examples thereof include octyldodecyl, hexyldecyl, isostearyl 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) sorbitol tetraoleate, polyoxyethylene alkyl ethers such as polyoxyethylene (20) octyldodecyl ether, polyoxyethylene hydrogenated castor oil derivatives such as polyoxyethylene (60) hydrogenated castor oil monoisostearate, and polyoxyethylene glycerol fatty acid esters such as polyoxyethylene (8) glyceryl monoisostearate.

Among these, the polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, and polyoxyethylene glycerin fatty acid ester are preferably contained in an amount of 1 or 2 or more, more preferably 1 or 2 or more, and still more preferably 1 or 2 or more, selected from the group consisting of polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene glycerin fatty acid ester, and still more preferably 1 or 2 or more, selected from the group consisting of polyoxyethylene (12) monoisostearate, polyoxyethylene (30) sorbitol, polyoxyethylene (20) sorbitan trioleate, and polyoxyethylene (8) glyceryl monoisostearate.

In the case where the component (a) contains 1 or 2 or more selected from the component (a 1) and the component (a 2) and the component (a 3), the content ratio of the total of the component (a 1) and the component (a 2) to the component (a 3) [ ((a 1) + (a 2))/(a 3) ] is preferably 3.0 or more, more preferably 4.5 or more, still more preferably 5.0 or more, preferably 10 or less, still more preferably 9 or less, still more preferably 8 or less, from the viewpoint of expanding the solubilization temperature region.

In addition, when component (a 1) and component (a 2) are contained, the content ratio [ (a 1)/(a 2) ] of component (a 1) to component (a 2) is preferably 0.4 or more, more preferably 0.6 or more, still more preferably 0.8 or more, preferably 8 or less, still more preferably 2.4 or less, still more preferably 1.6 or less, from the viewpoint of expanding the solubilization temperature region.

The content of the component (a) in the solubilized skin cleansing composition is 7 mass% or more, preferably 10 mass% or more, more preferably 12 mass% or more, still more preferably 14 mass% or more, and 30 mass% or less, preferably 25 mass% or less, still more preferably 20 mass% or less, still more preferably 18 mass% or less in terms of maintaining the solubility of the oily mascara while expanding the solubilization temperature region in the total composition. 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 still more preferably 14 to 18% by mass based on the total composition.

The fatty acid salt of component (B) has the effect of solubilizing component (C) together with component (A). Further, the skin after washing is given a thoroughly clean touch by improving the washing speed, and thus the naked muscle feeling is emphasized.

The fatty acid salt of the component (B) is preferably a substance represented by the general formula (1):

R ¹ -COOM ¹ …(1)

(wherein R is ¹ Represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms, M ¹ Represents alkali metal, alkaline earth metal, ammonium from alkanolamines, tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan or ornithine).

In addition, R is from the viewpoints of maintaining low-temperature stability after long-term storage, cleaning speed, and improving bare muscle feel immediately after cleaning ¹ The number of carbon atoms in (a) is more preferably 10 to 20, still more preferably 12 to 18.

More specifically, the fatty acid moiety is exemplified by fatty acid salts of 1 or 2 or more kinds selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachic acid, and behenic acid. Among these, from the viewpoints of expanding the solubilization temperature region, washing speed, and improving bare muscle feeling immediately after washing, it is preferable that the fatty acid moiety is a fatty acid salt of 1 or 2 or more selected from lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, more preferably that the fatty acid moiety is a fatty acid salt of 1 or 2 or more selected from lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid, still more preferably that the fatty acid moiety is a fatty acid salt of 3 or more selected from lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid, and still more preferably that the fatty acid moiety is lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid.

Examples of the salts of fatty acid salts include alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine, 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 being mixed with the unneutralized fatty acid and with the neutralizing agent to form a fatty acid salt.

The neutralizing agent is a compound showing 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 irritation when entering the eye. On the other hand, in order to remove makeup, careful fusion or the like is performed to make the makeup easy to enter the eyes, so that if pain occurs when the makeup enters the eyes, the makeup cannot be removed sufficiently. In the solubilizing composition of the present invention, the anionic surfactant of the component (B) is contained, and therefore, it is required that the solubilizing composition does not cause intense pain to the eyes. In addition, maintenance of the washing speed or bare muscle feeling immediately after washing is also required. From these viewpoints, it is preferable to contain (b 1) a salt selected from fatty acid salts of alkali metals, alkaline earth metals, ammonium and ammonium derived from alkanolamines, and (b 2) a salt selected from fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine; more preferably (b 1) a salt selected from fatty acid salts of alkali metals, and (b 2) a salt selected from fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine; more preferably (b 1) a salt selected from the group consisting of potassium and sodium fatty acid salts, and (b 2) a salt selected from the group consisting of tris (hydroxymethyl) aminomethane and aminomethyl propanediol fatty acid salts; still more preferably, (b 1) a potassium salt of a fatty acid and (b 2) a tris (hydroxymethyl) aminomethane salt of a fatty acid.

The molar ratio [ (b 1)/(b 2) ] of the component (b 1) to the component (b 2) is preferably 0.3 or more, more preferably 0.4 or more, still more preferably 0.5 or more, preferably 2.5 or less, still more preferably 2.0 or less, still more 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 terms of fatty acid in the solubilized skin cleansing composition is 0.1 mass% or more, preferably 0.6 mass% or more, more preferably 0.9 mass% or more in the total composition from the viewpoint of improving the rate of disappearance of the sliminess during cleansing and improving the bare muscle feel after cleansing; from the viewpoint of maintaining low-temperature stability, it 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, more preferably 0.9 to 2% by mass, based on the total composition.

The content in terms of fatty acid is calculated by referring to the fatty acid converted to the content of the corresponding fatty acid salt (for example, in the case of the potassium salt of stearic acid, the corresponding fatty acid is stearic acid).

In the present invention, the content ratio [ (B)/(a) ] of 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, still more preferably 0.25 or less, from the viewpoint of expanding 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 the content in terms of fatty acid.

The oil agent of the component (C) has the function of acting on make-up and dissolving or dispersing the make-up. If the oil of the component (C) is an oil used in a usual detergent composition, any oil may be used.

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

The oil agent of the 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 feeling of bare muscle immediately after washing; from the viewpoint of suppressing sagging at the time of coating and maintaining safety, it is preferably 1mpa·s or more, more preferably 3mpa·s or more.

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

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

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

From the above viewpoints, the ether oil preferably contains 1 or 2 or more kinds selected from dilauryl ether, dioctyl ether and cetyl-1, 3-dimethylbutyl ether.

From the above viewpoints, the silicone oil preferably contains a silicone oil having a viscosity (manufacturer's catalog number) selected from the range of 1.5 to 10mm ² 1 or more than 2 of dimethyl polysiloxane, octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane, tri (trimethylsilyl) methylsilane, tetra (trimethylsilyl) silane, and methylphenyl polysiloxane; more preferably from 1.5 to 2mm in viscosity ² 1 or more than 2 of dimethyl polysiloxane, octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane and tri (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, still more preferably 0.7 or more, and is preferably 0.99 or less, more preferably 0.97 or less, still more preferably 0.93 or less, from the viewpoint of improving the solubility of the oily mascara and improving the rate of the disappearance of the sliminess upon washing.

In addition, the oil solution of the component (C) preferably contains (C2) a saturated or unsaturated branched alcohol having 15 or more carbon atoms in order to expand the solubilization temperature range. From the viewpoint of expanding the solubilization temperature region, the number of carbon atoms of the saturated or unsaturated branched alcohol having 15 or more carbon atoms is preferably 16 or more, more preferably 17 or more, further preferably 18 or more, preferably 22 or less, more preferably 21 or less, further preferably 20 or less. Further, from the viewpoint of improving long-term storage stability, it is preferable to contain a saturated branched alcohol, and more preferable to contain a saturated branched monohydric alcohol.

Specifically, the branched alcohol having 15 or more carbon atoms is preferably 1 or 2 or more selected from hexyldecanol, isostearyl alcohol and octyldodecanol, more preferably 1 or 2 selected from isostearyl alcohol and octyldodecanol, and even more preferably isostearyl alcohol, from the viewpoint of extending the solubilization temperature region and improving the 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, still more preferably 0.07 or more, and preferably 0.30 or less, still more preferably 0.25 or less, still more preferably 0.22 or less, from the viewpoint of improving the bare muscle feeling immediately after washing and expanding the solubilization temperature region.

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, still more preferably 10 mass% or more in the total composition, and is 20 mass% or less, preferably 16 mass% or less, more preferably 14 mass% or less, still more preferably 12 mass% or less in order to maintain long-term storage stability, from the viewpoint of improving the solubility of the oily mascara. 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 based on the total composition.

The water-soluble solvent of the component (D) forms an aqueous phase together with the water of the component (F), and controls the solubility of the surfactant in the aqueous phase to thereby control HL balance, and also has an effect of suppressing dry feel of the skin after use.

The water-soluble solvent as the component (D) is not limited if it is a water-soluble solvent used for usual cosmetics. Preferably, the water-soluble solvent having 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 feel of the skin after use.

Here, the IOB value is an abbreviation of Inorganic/Organic Balance (Inorganic/Organic ratio), and 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, IOB value=inorganic value/organic value. For each of the "inorganic value" and the "organic value", for example, the "organic value" is set to 20 for 1 carbon atom in the molecule, and the "inorganic value" is set to 100 for 1 hydroxyl group, whereby the "inorganic value" and the "organic value" are set in accordance with each atom or functional group, and the "inorganic value" and the "organic value" of all atoms and functional groups in the organic compound are added to calculate the IOB value of the organic compound (see, for example, japanese patent publication No. Tian Shansheng, "organic conceptual diagram-basis & application-" p11 to 17, three co-publication, 1984).

Examples of the component (D) include monohydric alcohols such as ethanol, propanol, isopropanol, butanol and isobutanol; diols such as ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, 1, 3-butanediol, 1, 4-butanediol, hexanediol, and isopentyl glycol; glycerins such as glycerin and diglycerol; sugars such as sorbitol, maltitol, mannose, fructose, xylitol, maltotriose, threitol, erythritol, and glucose; polyols such as sugar derivatives of methyl glucoside and ethyl glucoside.

Among 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), diglycerol (IOB: 3.5), sorbitol (IOB: 5.0) and maltitol (IOB: 4.4) are preferable, and 1 or 2 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol, isoprene glycol and diglycerol are more preferable, and 1 or 2 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol and isoprene glycol are more preferable.

The content of the component (D) in the skin cleansing composition is 10 mass% or more, preferably 20 mass% or more, more preferably 30 mass% or more, further preferably 35 mass% or more, and 60 mass% or less, preferably 55 mass% or less, further preferably 50 mass% or less, further preferably 45 mass% or less in terms of extending the solubilization temperature region and suppressing tackiness after washing. The content of the component (D) is 10 to 60% by mass, preferably 20 to 55% by mass, more preferably 30 to 50% by mass, and still more preferably 35 to 45% by mass based on 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 is preferably 4.0 or less, further preferably 2.0 or less, further preferably 1.8 or less, from the viewpoint of expanding the solubilization temperature region and suppressing tackiness 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 are not required to form with fatty acid-like acidic components) and are incorporated in the composition in free form.

The solubilized skin cleanser composition of the invention contains fatty acid salts, and therefore the pH becomes alkaline. However, hydrolysis of nonionic surfactants readily occurs under long-term storage in the presence of moisture, yielding free fatty acids, while the pH of the system gradually decreases. The change also affects the degree of neutralization of fatty acids, and non-neutralized fatty acids tend to precipitate at low temperatures. In the present invention, the component (E) is further allowed to coexist in the solubilized skin cleansing composition, thereby neutralizing the free fatty acid formed during long-term storage in the presence of moisture, and promoting the redissolution.

Further, in the fatty acid salt of the component (B), when the fatty acid salt of the component (B2) is selected from the fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine, and the neutralizing agent for forming the fatty acid salt of the component (B2) to be blended in the composition is the same substance as the component (E), the component (E) is a component which exceeds the amount necessary for the neutralization of the anionic surfactant.

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

In the case of using the anionic surfactant (G) other than the component (B) in combination, the unneutralized component in the component (G) is calculated as 1 neutralization equivalent, and the total of the components (B) and (G) is calculated as 1 neutralization equivalent. The component (E) is blended in an amount exceeding 1 neutralization equivalent in the total of the component (B) and the component (G).

When (B1) and (B2) are used together, the amount of component (B2) blended in the (1 neutralization equivalent-the neutralization equivalent of component (B1)) is calculated to be component (B) when the neutralization equivalent of (B1) is less than 1, with preference given to neutralization of (B1). The remaining component (b 2) in an amount exceeding 1 neutralization equivalent is used 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, aminomethylpropanediol 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 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 region and improving long-term storage stability.

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

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

The content of the component (E) in the solubilized skin cleansing composition is 0.1% by mass or more, preferably 0.5% by mass or more, more preferably 0.8% by mass or more, and 6% by mass or less, preferably 4% by mass or less, more preferably 3.5% by mass or less, in view of maintaining long-term low-temperature stability and improving the cleansing 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, based on the total composition.

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

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

As the component (G), there may be mentioned anionic surfactants used in usual skin cleansers, for example, alkylbenzenesulfonates, alkane sulfonates, alkenyl sulfonates, alkyl sulfonates, 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 phosphates, alkylaryl ether phosphates, fatty acid amide ether phosphates, ether carboxylic acids or salts thereof, N-acyl amino acid salts, and the like.

Among these, from the viewpoints of suppressing dry feel of skin feel due to thorough cleansing by the fatty acid floating film, improving bare muscle feel immediately after cleansing, improving cleansing speed, and suppressing precipitation at low temperature, it is preferable to contain 1 or 2 or more selected from alkyl sulfate salts, alkyl ether sulfate salts, ether carboxylate salts, and N-acyl glutamate salts, more preferably 1 or 2 or more selected from alkyl ether sulfate salts and ether carboxylate salts, and still more preferably 1 or 2 or more selected from ether carboxylate salts.

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

R ² O(CH ₂ CH ₂ O) _n SO ₃ M ² …(2)

(in the formula (2), R ² An aliphatic hydrocarbon group having 8 to 22 carbon atoms; m is M ² Represents 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), R ² From the viewpoint of good low temperature stability, an aliphatic hydrocarbon group having 8 to 16 carbon atoms is preferable, an aliphatic hydrocarbon group having 8 to 14 carbon atoms is more preferable, and an aliphatic hydrocarbon group having 10 to 14 carbon atoms is still more preferable.

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

Specific examples of the alkyl ether sulfate include 1 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, it is preferable to contain 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. In the present specification, the values in parentheses of these compounds refer to the average molar number of addition of ethylene oxide.

Examples of commercial 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 ether carboxylic acids represented by the following general formula (3) or salts thereof.

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

(in the formula (3), R ³ 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; m is M ³ Represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or organic ammonium. )

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

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

M ³ Examples are: 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 viewpoints as described above, 1 or 2 or more are preferably selected from sodium, potassium, triethanolamine, and arginine, and more preferably 1 or 2 are selected from sodium and potassium.

From the same viewpoints as described above, the ether carboxylic acid or its salt is preferably 1 or 2 or more selected from the group consisting of polyoxyethylene lauryl ether carboxylic acid or its salt, polyoxyethylene myristyl ether carboxylic acid or its salt, and polyoxyethylene palmityl ether carboxylic acid or its salt, more preferably 1 or 2 or more selected from the group consisting of polyoxyethylene lauryl ether carboxylic acid or its salt, and polyoxyethylene myristyl ether carboxylic acid or its salt, and still more preferably polyoxyethylene lauryl ether carboxylic acid or its salt.

Examples of the commercial products of the ether carboxylic acid or the salt thereof include: AKYPO RLM 45CA (manufactured by the king company), AKYPO LM 26C (manufactured by the king company), and the like.

When the component (B) and the component (G) are used together, 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, still more preferably 0.3 or more, preferably 1 or less, still more preferably 0.9 or less, and still more preferably 0.7 or less, from the viewpoint of maintaining the washing speed, improving the feeling of bare muscle immediately after washing, and improving the low-temperature stability. The contents of the component (B) and the component (G) are acid converted values.

When the component (B) and the component (G) are used together, the ratio of the total amount of the component (B) and the component (G) to the component (A) [ ((B) + (G)/(A) ]) is preferably 0.11 or more, more preferably 0.12 or more, still more preferably 0.14 or more, preferably 0.70 or less, still more preferably 0.60 or less, still more preferably 0.45 or less, from the viewpoint of maintaining the washing speed, improving the feeling of bare muscle immediately after washing, and improving the low-temperature stability.

The solubilized skin cleansing composition of the present invention may further contain (H) an organic acid from the viewpoint of adjusting and maintaining the pH of the system within a predetermined range. From the viewpoint of improving the corrosion resistance, 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. 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 solubilized skin cleansing composition may be appropriately contained for the purpose of adjusting the pH to the range described below, and is preferably 0.3 mass% or less, more preferably 0.01 to 0.2 mass% in the solubilized skin cleansing composition from the viewpoint of long-term storage stability and good bare muscle feel immediately after washing.

The solubilized skin cleansing composition of the present invention may further contain components commonly used for cleansing agents, for example, surfactants other than the above components (a), (B) and (G), moisturizers other than the component (D), oily components other than the component (C), bactericides, anti-inflammatory agents, preservatives, chelating agents, tackifiers, abrasive agents, perfumes, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts, and the like.

The solubilized skin cleansing composition of the present invention may further contain a cationic surfactant from the viewpoint of improving the smoothness of the skin. The content of the cationic surfactant is preferably 5 mass% or less, more preferably 3 mass% or less, still more preferably 1 mass% or less, still more preferably 0.5 mass% or less, and still more preferably substantially none of the total composition from the viewpoint of suppressing the sliminess at the time of cleaning.

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

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

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

The solubilized skin cleansing composition is produced by mixing the ingredients by a usual method. As a specific manufacturing method, for example, may also be included: a step 1 of adding and mixing the component (A), the component (D), the component (E), the component (F), the optional component (H), the component (G) and other water-soluble components at optional heating; a step 2 of adding the component (B), the component (C) and optionally other oil-soluble components and mixing them at an optional temperature; and a step 3 of adding the preparation of step 2 to the preparation of step 1 and mixing the mixture.

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

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

The low temperature is a temperature at which the components having a boiling point of 70 ℃ or higher and the 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 temperature in the step 1 is arbitrary, and is preferably 10℃or higher, more preferably 20℃or higher, still more preferably 90℃or lower, and still more preferably 85℃or lower, from the viewpoint of not boiling water and sufficiently dissolving the aqueous phase component.

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

The solubilized skin cleansing composition of the present invention is preferably at a pH of 7 to 11, more preferably at a pH of 7 to 10, even more preferably at a pH of 7 to 9.5, even more preferably at a pH of 7.5 to 9.5 at 30 ℃ from the viewpoint of reducing skin irritation and improving bare muscle feel immediately after cleansing.

Further, in the production, since the nonionic surfactant is easily hydrolyzed to form a free fatty acid in the long-term storage in the presence of moisture, the pH of the system may be gradually lowered, and thus the pH is preferably 8 to 11, more preferably 8 to 10, even more preferably 8 to 9.5, still more preferably 8.5 to 9.5.

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

Further, the solubilized skin cleansing 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 improving the fusion with makeup dirt and improving the solubility of the oily mascara; from the viewpoint of suppressing sagging 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.

Here, a type B viscometer (TVB-10R viscometer manufactured by Tokyo industries Co., ltd., measurement conditions: rotor No.1, 60rpm, 60 seconds) was used for measuring the viscosity, and the viscosity at 30℃was measured.

The solubilized skin cleanser composition of the 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 cleansing 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 cleansing composition of the present invention is suitable for use as a makeup remover/cleanser which can exert the effect of a makeup remover and a cleanser, which can remove makeup cosmetics (foundations, mascaras, eye shadows, sunscreens, lipsticks, etc.) applied to the face, particularly, in a single dose, from the viewpoint of having excellent removal power of makeup cosmetics and providing a bare feel after washing, as is the case with a cleanser.

The solubilized skin cleansing composition of the present invention is suitable for use as makeup remover.

The solubilized skin cleansing composition of the present invention can be used, for example, by applying it to make-up skin, fusing it, and rinsing it with water. The cosmetic composition may be applied to cosmetic cotton, rubbed on the skin after makeup, and rinsed.

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

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

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

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

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

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

<4> the solubilized skin cleansing composition according to <3> above, wherein (a 1) the nonionic surfactant having HLB of 6 to 8 preferably contains 1 or 2 or more selected from the group consisting of diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether, more preferably contains 1 or 2 selected from the group consisting of diglycerol isostearate and diglycerol oleate, and still more preferably contains diglycerol isostearate.

<5> the solubilized skin cleansing composition according to the above <3> or <4>, wherein (a 2) the nonionic surfactant having an HLB of more than 13 and 18 or less preferably contains 1 or 2 or more selected from the group consisting of 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 selected from the group consisting of polyoxyethylene fatty acid esters and alkyl glucosides, and still more preferably contains 1 or 2 selected from the group consisting of polyoxyethylene (12) monolaurate and decyl glucoside.

<6> the solubilized skin cleansing composition according to any one of <3> to <5>, wherein the nonionic surfactant having (a 3) 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 still more preferably contains 1 or 2 or more selected from polyoxyethylene (12) monoisostearate, tetraoleic acid polyoxyethylene (30) sorbitol, polyoxyethylene (20) sorbitan trioleate and polyoxyethylene (8) glyceryl monoisostearate.

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

<8> the solubilized skin cleansing composition according to any one of <3> to <7>, wherein component (A) contains component (a 1) and component (a 2), and the content ratio [ (a 1)/(a 2) ] of component (a 1) to component (a 2) is preferably 0.4 or more, more preferably 0.6 or more, still more preferably 0.8 or more, preferably 8 or less, more preferably 2.4 or less, still more preferably 1.6 or less.

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

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

R ¹ -COOM ¹ …(1)

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

<12> the solubilized skin cleansing composition as described in any one of above <1> to <11>, wherein component (B) preferably 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 (b 1) a salt selected from fatty acid salts of alkali metals, and (b 2) a salt selected from fatty acid salts of tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol and arginine; further preferably, the composition contains (b 1) a salt selected from the group consisting of potassium and sodium fatty acid salts, and (b 2) a salt selected from the group consisting of tris (hydroxymethyl) aminomethane and aminomethyl propanediol fatty acid salts; still more preferably, (b 1) a potassium salt of a fatty acid and (b 2) a tris (hydroxymethyl) aminomethane salt of a fatty acid.

<13> the solubilized skin cleansing composition according to <12> above, wherein the molar ratio [ (b 1)/(b 2) ] of the component (b 1) to the component (b 2) 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 cleansing composition according to any one of <1> to <13>, wherein the content of the component (B) is preferably 0.6 mass% or more, more preferably 0.9 mass% or more in terms of fatty acid conversion in the total composition; preferably 3 mass% or less, more preferably 2 mass% or less.

<15> the solubilized skin cleansing composition according to any one of the above <1> to <14>, 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, further preferably 0.25 or less.

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

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

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

<21> the solubilized skin cleansing composition according to any one of the above <1> to <20>, 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, still more preferably 1.7 to 3.4.

<22> the solubilized skin cleansing composition according to any one of <1> to <21>, 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, the composition contains 1 or 2 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol, isoprene glycol and diglycerol, and still more preferably, the composition contains 1 or more selected from ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol and isoprene glycol.

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

<24> the solubilized skin cleansing composition according to any one of the above <1> to <23>, 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 component (E) is a base selected from tris (hydroxymethyl) aminomethane, aminomethylpropanol, aminomethylpropanediol, arginine, lysine, histidine, tryptophan and ornithine; it is not in a salt form (it is not necessary to form a salt such as a fatty acid salt with an acidic component such as a fatty acid), and is incorporated in a free form in the composition.

<26> the solubilized skin cleansing composition according to any one of <1> to <25>, 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, still more 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 cleansing composition according to any one of the above <1> to <26>, wherein the molar ratio [ (B)/(E) ] of the content 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 cleansing composition according to any one of the above <1> to <27>, wherein the content of the component (E) in the total composition is preferably 0.5 mass% or more, more preferably 0.8 mass% or more, and preferably 4 mass% or less, more preferably 3.5 mass% or less.

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

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

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

R ² O(CH ₂ CH ₂ O) _n SO ₃ M ² …(2)

(in the formula (2), R ² An aliphatic hydrocarbon group having 8 to 22 carbon atoms; m is M ² Represents 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); preferably, the aqueous dispersion contains at least 1 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 cleansing composition as described in <30> above, wherein the ether carboxylic acid or salt thereof is preferably represented by the following general formula (3):

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

(in the formula (3), R ³ 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; m is M ³ Represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or organic ammonium); preferably contains 1 or more than 2 selected from polyoxyethylene lauryl ether carboxylic acid or its salt, polyoxyethylene myristyl ether carboxylic acid or its salt, and polyoxyethylene palmityl ether carboxylic acid or its salt, more preferably contains polyoxyethylene lauryl ether carboxylic acid or its saltThe polyoxyethylene myristyl ether carboxylic acid or its salt is preferably contained in 1 or 2 of the salts thereof, and the polyoxyethylene myristyl ether carboxylic acid or its salt is more preferably contained in the mixture.

<33> the solubilized skin cleanser composition as described in any one of the above <30> to <32>, wherein component (B) and 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, still more preferably 0.3 or more, preferably 1 or less, more preferably 0.9 or less, still more preferably 0.7 or less.

<34> the solubilized skin cleanser composition as described in any one of <30> to <33>, wherein component (B) and component (G) are preferably 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.

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

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

<37> the solubilized skin cleansing composition according to any one of <1> to <36>, wherein the content of the cationic surfactant in the total composition 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, further preferably substantially none.

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

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

<40> the solubilized skin cleanser composition according to any one of <1> to <39>, wherein the viscosity at 30 ℃ is preferably 300 mPa-s or less, more preferably 150 mPa-s or less, further preferably 80 mPa-s 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>, wherein the composition has a transparent to translucent appearance.

<42> the solubilized skin cleansing composition according to any one of <1> to <41>, wherein the application site is preferably skin, more preferably skin other than scalp, further preferably any site such as face, body, hand and foot, and further more preferably applicable to face.

<43> the solubilized skin cleansing composition according to any one of <1> to <42>, wherein the composition is applied to the skin after makeup, and is used by washing with water after being applied to the skin after makeup.

<44> a solubilized skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F) and having a content ratio (B)/(A) of component (B) to component (A) of 0.06 to 0.35:

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

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

<45> a method for producing a solubilized skin cleansing composition, comprising the steps of mixing 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 set to 0.06 to 0.35:

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

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

<46> the method for producing a solubilized skin cleansing composition according to <45> above, wherein the method comprises: a step 1 of adding and mixing the component (A), the component (D), the component (E), the component (F), the optional component (H), the component (G) and other water-soluble components at optional heating; a step 2 of adding the component (B), the component (C) and optionally other oil-soluble components and mixing them at an optional temperature; and a step 3 of adding the preparation of step 2 to the preparation of step 1 and mixing the mixture.

<47> a solubilized skin cleansing composition comprising the following components (a), (B), (C), (D), (E) and (F), the content ratio (B)/(a) of component (B) to component (a) being 0.06 to 0.35, and the pH at 30 ℃ being 7 to 11:

(A) A nonionic surfactant which contains 2 or more nonionic surfactants selected from (a 1) nonionic surfactants having an HLB of 6 to 8, (a 2) nonionic surfactants having an HLB of more than 13 and not more than 18, and (a 3) 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, and which has an HLB of 6 to 18 at the time of mixing of 7 to 30 mass%;

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

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

(A) A nonionic surfactant which contains (a 1) 1 or 2 or more nonionic surfactants selected from the group consisting of nonionic surfactants having an HLB of 6 to 8, (a 2) 1 or 2 or more nonionic surfactants selected from the group consisting of nonionic surfactants having an HLB of more than 13 and 18 or less, and (a 3) nonionic surfactants having a branched alkyl group or more than 2 alkyl groups and having an HLB of more than 8 and 13 or less, and has an HLB of 6 to 18 at the time of mixing of 7 to 30 mass%;

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

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

(F) 5 to 40 mass percent of water.

<49> a solubilized skin cleansing 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; the component (B) is a component (B1) and the molar ratio [ (B1)/(B2) ] of the component (B2) to the component (B2) is 0.3 to 2.5; the molar ratio [ (B)/(E) ] of the component (B) to the component (E) is 0.05 to 7:

(A) A nonionic surfactant comprising (a 1) a nonionic surfactant having an HLB of 6 to 8 selected from 1 or more of diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether; (a2) 1 or 2 or more selected from polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerin fatty acid esters and alkyl glucosides having an alkyl group of 8 to 18 carbon atoms, and 1 or 2 or more selected from nonionic surfactants having an HLB of more than 13 and 18 or less selected from the group consisting of polyoxyethylene fatty acid esters and alkyl glucosides; and (a 3) a nonionic surfactant having an HLB of more than 8 and not more than 13 and having a branched alkyl group or more than 2 alkyl groups selected from 1 or 2 kinds of polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters, wherein the HLB at the time of mixing is from 6 to 18 and from 7 to 30 mass%;

(B) A fatty acid salt comprising (b 1) a fatty acid salt of 1 or 2 or more kinds selected from alkali metal, ammonium and ammonium derived from alkanolamine; and (b 2) a salt selected from fatty acid salts of 1 or 2 or more of tris (hydroxymethyl) aminomethane and aminomethyl propanediol, the fatty acid salt being 0.1 to 4% by mass;

(C) 5 to 20% by mass of an oil composition comprising (c 1) a saturated or unsaturated branched alcohol having 15 or more carbon atoms and having a viscosity of 15 mPas or less at 30 ℃;

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

(E) 0.1 to 6 mass% of a base selected from 1 or 2 of tris (hydroxymethyl) aminomethane and aminomethyl propanediol;

(F) 5 to 40 mass percent of water.

<50> a solubilized skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of component (B) to component (A) is set to 0.06 to 0.35, and the pH at 30 ℃ is set to 7 to 11:

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

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

(A) A nonionic surfactant containing (a 1) 1 or 2 or more nonionic surfactants selected from the group consisting of nonionic surfactants having an HLB of 6 to 8, (a 2) 1 or 2 or more nonionic surfactants selected from the group consisting of nonionic surfactants having an HLB of more than 13 and 18 or less and (a 3) nonionic surfactants having a branched alkyl group or more than 2 alkyl groups and having an HLB of more than 8 and 13 or less, and having an HLB of 6 to 18 at the time of mixing of 7 to 30 mass%;

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

<52> a solubilized skin cleansing composition comprising the following components (A), (B), (C), (D), (E) and (F), wherein the content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, the content molar ratio [ (B1)/(B2) ] of component (B1) to component (B2) is 0.3 to 2.5, and the content molar ratio (B)/(E) of component (B) to component (E) is 0.05 to 7:

(B) A fatty acid salt comprising (b 1) a fatty acid salt of 1 or 2 or more kinds selected from alkali metal, ammonium and ammonium derived from alkanolamine; and (b 2) a salt selected from fatty acid salts of 1 or 2 kinds of tris (hydroxymethyl) aminomethane and aminomethyl propanediol, in terms of fatty acid, 0.1 to 4 mass%;

(F) 5 to 40 mass percent of water.

<53> a method for producing a solubilized skin cleansing 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) A nonionic surfactant which comprises 2 or more nonionic surfactants selected from (a 1) nonionic surfactants having an HLB of 6 to 8, (a 2) nonionic surfactants having an HLB of more than 13 and not more than 18, and (a 3) 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, and which has an HLB of 6 to 18 at the time of mixing of 7 to 30 mass%;

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

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

(A) A nonionic surfactant containing 1 or 2 or more nonionic surfactants selected from (a 1) nonionic surfactants having an HLB of 6 to 8, (a 2) nonionic surfactants selected from 1 or 2 or more nonionic surfactants having an HLB of more than 13 and 18 or less, and (a 3) nonionic surfactants having a branched alkyl group or more than 2 alkyl groups and having an HLB of more than 8 and 13 or less, wherein the HLB at the time of mixing is 6 to 18, and the amount of the nonionic surfactants is 7 to 30 mass%;

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

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

(A) A nonionic surfactant comprising (a 1) 1 or 2 or more nonionic surfactants having an HLB of 6 to 8 selected from the group consisting of diglycerol isostearate, diglycerol oleate and isostearyl glyceryl ether, (a 2) 1 or 2 or more nonionic surfactants having an HLB of more than 13 and not more than 18 selected from the group consisting of polyoxyethylene fatty acid esters and alkyl glucosides, and (a 3) 1 or more nonionic surfactants having an HLB of more than 8 and not more than 13 selected from the group consisting of polyoxyethylene fatty acid esters and alkyl glucosides, and (a 3) 6 to 18 and 7 to 30 mass% selected from the group consisting of polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene alkyl ethers and polyoxyethylene glycerin fatty acid esters;

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

(F) 5 to 40 mass percent of water.

Examples (example)

Examples 1 to 36 and comparative examples 1 to 9

The solubilized skin cleansing compositions shown in tables 1 to 4 were prepared, and the appearance immediately after the preparation, the pH immediately after the preparation, the temperature stability immediately after the preparation (solubilization temperature region), the solubility of the oily mascara, the washing speed, the feeling of bare muscle immediately after the washing, and the temperature stability after long-term storage (solubilization temperature region) were evaluated. Further, the degree of pain upon entering the eyes was evaluated for examples 27 to 36. The results are shown in tables 1 to 4. The contents described in the tables are expressed as effective amounts.

As the ingredients noted in the table, the following raw materials were used.

*1: PARLEAM4 (manufactured by Nitro oil Co., ltd., viscosity 5.9 mPa. S)

*2: KALCOL 200GD (manufactured by Huawang Kongsi with viscosity of 41.7 mPa.s)

*3: AMISOFT LA-D (manufactured by AJINOMOTO HEALTHY SUPPLY Co., ltd.)

*4: AMISOFT HA-P (manufactured by AJINOMOTO HEALTHY SUPPLY Co., ltd.)

*5: AMISOFT CK-22 (manufactured by AJINOMOTO HEALTHY SUPPLY Co., ltd.)

*6: AMISOFT MK-11 (manufactured by AJINOMOTO HEALTHY SUPPLY Co., ltd.)

*7: AKYPO LM-26SD (manufactured by Huawang Co., ltd.)

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

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

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

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

(manufacturing method)

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

Step 2: the components 10 to 18 were added to the preparation in step 1, and the mixture was uniformly mixed at 25℃and 200 rpm.

And step 3: mixing 1-9 parts, heating and dissolving under stirring at 80 ℃.

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

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

(evaluation method)

(1) Appearance immediately after manufacture:

immediately after production, 40mL of each skin cleansing composition was added to a 50mL sample bottle (manufactured by Tokyo Nitro instruments Co., ltd.: gauge bottle # 6), and the mixture was visually evaluated as any of transparency, translucency, opaqueness, separation and precipitation.

In this case, the transparent, translucent, and opaque sample bottles were provided with a plate on the side surface of which bar codes and numbers of 2.0mm square size having a bar and space width ranging from 0.4 to 1.0mm were printed in black, and when visually observed from the opposite side, the sample bottles were judged as follows from the recognition of the bar codes and the numbers.

The "transparent" is a state in which the lines and numerals of the bar code are clearly recognized.

"semitransparent" is a state in which a bar code is recognized as a line, but a number cannot be recognized.

The "white turbidity" is a state in which the line and the number of the bar code cannot be recognized.

The phase separation and precipitation of the content observed in each skin cleansing composition were regarded as separation and precipitation, respectively.

(2) pH immediately after production

Immediately after the production, the stock solutions of the respective skin cleansing compositions were measured by a pH meter (Table pH/Water quality Analyzer LAQUA F-72T, manufactured by horiba, inc.) at 30 ℃. At this time, the mixture was stirred slowly for 15 minutes until the value was stable, and the stable value after stirring was measured.

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

(3-1) determination of foggy spots:

a50 mL sample bottle (manufactured by Tokyo Nitro instruments Co., ltd.: gauge bottle # 6) was placed with 30mL of each skin cleansing composition and a stirrer, and heated in a water bath at 70℃until cloudiness occurred. Thereafter, the mixture was taken out of the water bath. The sample vial was cooled under stirring at 350rpm with the stirrer on the stirrer at 25 ℃. Here, the temperature at which the film becomes transparent to translucent is used as the foggy spot.

(3-2) determination of solubilization Limit Point:

a50 mL sample bottle (manufactured by Tokyo Nitro instruments Co., ltd.: gauge bottle # 6) was placed in 40mL of each skin cleansing composition, and stored in a constant temperature bath at 5℃and 0℃and-5℃for 12 hours. Thereafter, the appearance at each temperature was visually observed, and the appearance was evaluated as any of transparency, translucency, opaqueness, and 2-layer separation and precipitation. The lowest value of temperatures at which a transparent to translucent appearance can be maintained is used as the limit point for solubilization.

(4) Solubility of oily mascara:

3g of waterproof mascara (maybeline, magnum Volum Mascara waterproof) was uniformly applied in a round shape having a diameter of 12mm to a glass plate (manufactured by MICRO SLIDE GLASS, MATSUNAMI Co.). After drying for 8 hours, 0.03g of each skin cleansing composition was added dropwise, and the mixture was fused with a fingertip at a speed of 1 circle per second with a pressing force of about 100 g. After 50 cycles of fusion, the degree of dissolution and the degree of residual of the mascara were observed and evaluated according to the following criteria.

(determination criterion)

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

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

3: mascara is semi-soluble (mascara remaining more than 10% -50% or less on the glass plate).

2: the mascara is dissolved in a small amount (more than 50% -90% of mascara remains on the glass plate).

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

(5) Cleaning speed

Each skin cleanser composition was actually applied to the face by 5 persons of a panelist and the agent was rinsed. As an evaluation index, a cleanser (Biore Skin Care cleanser manufactured by queen corporation) was used, and the cleansing rate was evaluated based on the rate of non-sliminess of each Skin cleansing composition when the cleansing rate was evaluated as the same number of people as the cleanser.

(evaluation criterion)

5: among 5, 5 persons were evaluated as rapid cleaning.

4: of the 5, 4 were evaluated as wash fast.

3: of the 5, 3 were evaluated as quick wash.

2: 2 out of 5 were evaluated as wash fast.

1: of 5, 1 or less were evaluated as rapid cleaning.

(6) Bare muscle feel immediately after washing

Each skin cleanser composition was actually applied to the face by 5 persons of a panelist and the agent was rinsed. As an evaluation index, a cleanser (Biore Skin Care cleanser manufactured by queen corporation) was used, and the bare muscle sensation immediately after cleansing was evaluated on the basis of the number of persons who evaluated the Skin feel (bare muscle sensation) that the Skin felt thoroughly clean after cleansing (in a state where the Skin was still wet before wiping with a towel) as being equivalent to the cleanser.

(evaluation criterion)

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

4: of the 5, 4 were evaluated as feeling bare muscle sensation.

3: of the 5, 3 were evaluated as feeling bare muscle sensation.

2: 2 out of 5 were evaluated as feeling bare muscle sensation.

1: of the 5 persons, 1 person or less was evaluated as feeling bare muscle sensation.

(7) Temperature stability after long term storage (solubilization temperature zone)

The temperature stability after long-term storage was evaluated. Specifically, 180mL of each skin cleansing composition was placed in a PET container (AL-CL 06A case 200M NB527C Oil, manufactured by Giku industries Co., ltd.) to accelerate deterioration, and the resultant was stored at 50℃for one month, and then the haze point was measured in the same manner as in (3-1) above. The solubilization limit was measured in the same manner as in (3-2) above after the degradation was accelerated in the same manner as above.

(8) Pain level upon entry into the eye

The extent of pain upon entering the eyes was evaluated by panelists 3 in the professional evaluation group, assuming that the mascara was removed, after each skin cleanser composition was fused with the lashes and the surroundings of the eyes for 20 seconds, the eyes were opened and blinked 10 times. The average value of the evaluation scores was determined, and the degree of pain at the time of entering the eyes was evaluated, with the result that almost no pain was found to be 4 points, very little pain was found to be 3 points, little pain was found to be 2 points, and little pain was found to be 1 point. In addition, when a cleanser (Biore Skin Care cleanser manufactured by Kagaku corporation) was used, a very intense pain was felt.

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Claims

1. A solubilized skin cleanser composition, wherein,

the solubilized skin cleansing composition contains the following components (A), (B), (C), (D), (E) and (F), wherein component (A) is 1 or more nonionic surfactants having HLB of 6 to 18, HLB of the whole component (A) is 9 to 12.5, content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and content molar ratio (B)/(E) of component (B) to component (E) is 0.18 to 3.58:

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

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

2. The solubilized skin cleaner composition of claim 1, wherein,

the component (C) contains: (c 1) an oil agent having a viscosity of 15 mPas or less at 30 ℃.

3. The solubilized skin cleaner composition of claim 1, wherein,

the component (C) contains: (c2) Saturated or unsaturated branched alcohols having 15 or more carbon atoms.

4. A solubilized skin cleaner composition according to claim 1 to 3, wherein,

the component (A) is 2 or more nonionic surfactants selected from the group consisting of (a 1) nonionic surfactants having HLB of 6 to 8, (a 2) nonionic surfactants having HLB of more than 13 and 18 or less, and (a 3) nonionic surfactants having branched alkyl groups or 2 or more alkyl groups and having HLB of more than 8 and 13 or less.

5. A solubilized skin cleaner composition according to claim 1 to 3, wherein,

the component (B) contains: (b1) Fatty acid salts selected from potassium and sodium salts of fatty acids, and (b 2) fatty acid salts selected from tris (hydroxymethyl) aminomethane salts and aminomethyl malonate of fatty acids, and the content mass ratio (b 1)/(b 2) of the component (b 1) to the component (b 2) is 0.3 to 2.5.

6. A solubilised skin cleaner composition according to any one of claims 1 to 3, wherein the pH is from 7 to 11 at 30 ℃.

7. A solubilized skin cleaner composition according to claim 1 to 3, wherein,

component (A) is a fatty acid ester.

8. A solubilized skin cleanser composition, wherein,

the solubilized skin cleansing composition comprises the following components (A), (B), (C), (D), (E) and (F), wherein component (A) is 1 or more than 2 nonionic surfactants having HLB of 6-18, HLB of the whole component (A) is 9-12.5, content ratio (B)/(A) of component (B) to component (A) is 0.06-0.35, and molar ratio of component (B) to component (E)

(B) and/(E) is 0.18 to 3.58:

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

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

9. A method for producing a solubilized skin cleansing composition, wherein,

the method for producing the solubilized skin cleansing composition comprises mixing the following components (A), (B), (C), (D), (E) and (F), wherein component (A) is 1 or 2 or more nonionic surfactants having HLB of 6 to 18, HLB of the whole component (A) is 9 to 12.5, content ratio (B)/(A) of component (B) to component (A) is 0.06 to 0.35, and content molar ratio (B)/(E) of component (B) to component (E) is 0.18 to 3.58:

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

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

(C) 5-20% of oil agent;

(D) 10 to 60 mass percent of water-soluble solvent;

(F) 5 to 40 mass percent of water.

10. Use of the solubilized skin cleaner composition of any one of claims 1 to 8 as a make-up remover.