JP2004217640A - Skin detergent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a skin detergent composition excellent in cleaning power for either oily soil or water soluble soil, and having a good rinsing property. <P>SOLUTION: This skin detergent composition contains (A) 3-80 wt. % oily component, (B) 1-45 wt. % hydrophilic nonionic surfactant, (C) 1-45 wt. % lipophilic amphiphilic substance, (D) 3-80 wt. % water soluble solvent and (E) 3-80 wt. % water, and has an isotropic one liquid phase having a bi-continuous structure. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a skin cleanser composition having excellent detergency and good rinsing properties.

As cleansing cosmetics, oil-containing compositions are used to remove makeup cosmetics, and in combination with various surfactants, emulsifying, solubilizing and liquid crystal dosage forms are used. Yes. Of these, the solubilized dosage forms are particularly excellent in terms of ease of spreading and compatibility with dirt.
The solubilized type includes a dosage form in which the oil phase is solubilized in the aqueous phase, a dosage form in which water is solubilized in the oil phase, and a dosage form in which the oil phase and the aqueous phase form a continuous phase. The dosage form in which the oil phase is solubilized in the water phase is a continuous phase, so it has a high cleaning action against water-soluble soils such as salts and water-soluble polymers, but it is soluble in waxes and liquid oils. Cleaning action against dirt is not enough. On the other hand, the dosage form in which water is solubilized in the oil phase has a high cleaning action against oil-soluble dirt, but the washing action against water-soluble dirt is not sufficient. A dosage form in which an oil phase and an aqueous phase form a continuous phase is called a bicontinuous structure, and a high cleaning action is expected for both oil-soluble soils and water-soluble soils.

  In Non-Patent Document 1, when a composition comprising (1) hexane, (2) sodium oleate, and (3) a monoalkyl polyoxyalkylene ether forms a bicontinuous structure, model stains are present. It is disclosed that the time until rolling-up is shortened. However, the composition is unsuitable for use as a skin cleanser from the viewpoint of safety. Also, it is not easy to remove the composition with water for rinsing.

  Patent Document 1 includes (1) a polar organic solvent, (2) an oily liquid that is not compatible with the polar organic solvent, and (3) a nonionic surfactant that dissolves in each of the polar organic solvent and the oily liquid. It is disclosed that a non-aqueous detergent composition having a composition ratio in the fishtail region (bicontinuous structure) is excellent in temperature stability and can be easily removed by water after use. Yes. However, since the composition does not contain water, a refreshing sensation and a refreshing sensation are not obtained during use, and the usability as a skin cleanser is inferior. Moreover, since it is a composition which does not contain water, there also exists a problem that environmental impact is large.

  Patent Document 2 contains (1) an amphoteric surfactant, (2) an anionic surfactant, (3) a liquid alcohol and / or a liquid fatty acid, and (4) water, and (1) and (2) When the surface tension x with respect to decane of 1% by mass aqueous solution and the surface tension with respect to decane of each 1% by mass aqueous solution of (1) or (2) is defined as y, the relationship of x <y-1> A composition that fills and forms an isotropic surfactant continuous phase (bi-continuous structure) is described, has excellent detergency, is safe for the body, and is safe for the environment It is described that it is fully considered. However, this composition does not have a satisfactory cleaning action against oil-based soils.

  Patent Document 3 contains (1) silicone oil, (2) polar oil, (3) nonionic surfactant, and (4) water, and isotropic surfactant continuous phase (bicontinuous structure). ), And Patent Document 4 contains (1) silicone oil, (2) nonionic surfactant, (3) a water-soluble substance having a hydroxyl group, and (4) water. , Compositions that form an isotropic surfactant continuous phase (bicontinuous structure) are described. When used as a skin care cosmetic, these compositions give a smooth and smooth feel, and when used as a make-up remover, have a high make-up removal effect, and when used as a hair care cosmetic, hair. It is described as having a good feeling of use that is well-familiar with and glossy. However, these compositions do not have a sufficient cleaning action and are not satisfactory in terms of spreading on the skin and compatibility with dirt. Furthermore, it has not been easy to remove the cleaning composition and dirt with water.

  Patent Document 5 includes (1) a nonpolar or weakly polar solvent, (2) a water-soluble or water-dispersible low molecular weight amphiphile, and (3) a polar solvent, which forms a bicontinuous structure. It is disclosed that the product is useful for removing fat or tar without using mechanical action. However, these compositions do not have a sufficient cleaning action against oil-based soils. In addition, it is not satisfactory for the compatibility with the spread and dirt on the skin.

In addition, none of the compositions described in the above-mentioned patent documents has a sufficient cleaning action on oily stains and water-soluble stains, and in particular, cosmetics that are difficult to be removed by sweat, tears, meals, etc., such as long lasting The cleaning performance for mascara, lipstick, and foundation was not satisfactory.
Oil Chemistry, 1994, Vol. 43, No. 2, p. 131-136 JP-A-6-293617 JP 2002-20791 A JP 2000-256132 A JP 2000-256124 A JP-A-6-306400

  An object of the present invention is to provide a skin cleanser composition having excellent detergency against oil-soluble soils and water-soluble soils and having good rinsing properties.

  The present inventors have combined components (A) to (E) described below at a specific ratio, and a skin cleansing composition having an isotropic one-liquid phase having a bicontinuous structure is an oily stain and a water-soluble stain. It was found that they have excellent detergency and good rinsing properties.

  The present invention includes (A) 3 to 80% by weight of an oily component, (B) 1 to 45% by weight of a hydrophilic nonionic surfactant, (C) 1 to 45% by weight of a lipophilic amphiphile, (D) water-soluble The present invention provides a skin cleanser composition having an isotropic one-liquid phase containing 3 to 80% by weight of an ionic solvent and (E) 3 to 80% by weight of water and having a bicontinuous structure.

  The skin cleansing composition of the present invention has an excellent detergency for both oily soil and water-soluble soil, and has good rinsing properties.

As the oil component of the component (A) used in the present invention, liquid oils usually used in cosmetics can be used, for example, hydrocarbon oils such as liquid paraffin, liquid isoparaffin, squalane; isostearic acid cholesteryl ester, palmitic acid. Isopropyl, isopropyl myristate, neopentyl glycol dicaprate, isopropyl isostearate, octadecyl myristate, cetyl 2-ethylhexanoate, isononyl isononanoate, isotridecyl isononanoate, tri (2-ethylhexanoate) glycerin, tri (caprylic acid, Capric acid) Ester oil such as glycerin; Ether oil such as alkyl-1,3-dimethylbutyl ether and nonylphenyl ether; Decamethylcyclopentasiloxane, Octamethylcyclotetrasiloxane And the like can be used terpene oil; animal and vegetable oils such as olive, methyl cyclo polysiloxanes, methyl polysiloxanes, silicone oils such as methyl phenyl polysiloxane.
Furthermore, the thing whose viscosity in 25 degreeC is 30 mPa * s or less is preferable. The viscosity is measured with a BM viscometer (manufactured by Tokimec, measurement conditions: rotor No. 1, 60 rpm).

  Among these, liquid paraffin, liquid isoparaffin, neopentyl glycol dicaprate, isopropyl isostearate, cetyl 2-ethylhexanoate, isononyl isononanoate, tri (caprylic acid / capric acid) glycerin, alkyl-1,3-dimethylbutyl ether, Decamethylcyclopentasiloxane and octamethylcyclotetrasiloxane are preferred, particularly liquid isoparaffin, tri (caprylic acid / capric acid) glycerin, alkyl-1,3-dimethylbutyl ether, and decamethylcyclopentasiloxane are preferred, and fluidized. Isoparaffin is preferred. As the liquid isoparaffin, hydrogenated polyisobutene is particularly preferred, and those having a degree of polymerization of isobutene of 3 to 6 are more preferred from the viewpoint of cleaning performance against oily soil.

  Two or more types of component (A) can be used, and 3 to 80% by weight, preferably 5 to 65% by weight, is contained in the total composition. If it is less than 3% by weight, the cleaning action for oily soil is not sufficient and the rinsing property is poor, and if it exceeds 80% by weight, the cleaning action for water-soluble soil is deteriorated.

  The hydrophilic nonionic surfactant of component (B) used in the present invention preferably has an HLB of more than 8, and particularly preferably has an HLB of 9 or more. Here, HLB indicates the molecular weight of the hydrophilic group part in the total molecular weight of the surfactant, and the polyoxyethylene nonionic surfactant is obtained by the following Griffin equation. It is.

HLB value = E / 5
E:% by weight of polyoxyethylene moiety contained in the surfactant molecule

  Specifically, polyethylene glycol fatty acid esters such as polyethylene glycol (12) monolaurate, polyethylene glycol alkyl ethers such as polyethylene glycol (20) octyldodecyl ether, and polyethylene glycol alkyl phenyl ethers such as polyethylene glycol (20) nonylphenyl ether. Polyethylene glycol castor oil derivatives such as polyethylene glycol (50) castor oil, polyethylene glycol hydrogenated castor oil derivatives such as polyethylene glycol (60) hydrogenated castor oil monoisolaurate, polyethylene such as polyethylene glycol (20) sorbitan monostearate Glycol surfactants; polyglycerol fatty acid esters such as diglycerol monooleate; Polyglycerol alkyl ethers hexyl ether to down 2-ethyl; sucrose fatty acid esters such as sucrose stearate; alkylpolyglucoside, and the like. Further, among them, those having a hydrophobic group having 8 or more carbon atoms, particularly 12 or more are preferable because of good rinsing properties.

  Of these, polyethylene glycol fatty acid esters, polyethylene glycol alkyl ethers, polyglycerin fatty acid esters, polyethylene glycol sorbitan fatty acid esters, sucrose fatty acid esters, and alkyl polyglucosides are preferred, especially polyethylene glycol fatty acid esters, polyethylene glycol alkyl ethers, Polyethylene glycol sorbitan fatty acid ester, sucrose fatty acid ester, and alkyl polyglucoside are more preferable because of good cleaning performance against oily soil and water-soluble soil. Furthermore, among these, polyethylene glycol fatty acid ester, polyethylene glycol sorbitan fatty acid ester, sucrose fatty acid ester, and alkyl polyglucoside are preferable because of their good safety to the skin. Furthermore, polyethylene glycol fatty acid esters and alkyl polyglucosides are preferred because of their good cleaning performance against water-soluble soils.

  Two or more types of component (B) can be used, and are contained in the total composition in an amount of 1 to 45% by weight, preferably 1 to 40% by weight. If it is less than 1% by weight, the rinsing property is poor, and if it exceeds 45% by weight, the cleaning action against oily soil and water-soluble soil is deteriorated.

  As the lipophilic amphiphilic substance of component (C) used in the present invention, a nonionic surfactant having an HLB of 8 or less, a fatty alcohol having 8 to 25 carbon atoms, a fatty acid having 8 to 25 carbon atoms, or a fatty acid having 8 to 25 carbon atoms Monoalkyl phosphoric acid having an alkyl group is preferred. In these, it is preferable that the number of carbon atoms of the hydrophobic group is 8 or more, particularly 12 or more because the cleaning performance against oily soil and water-soluble soil is good.

  Examples of nonionic surfactants having an HLB of 8 or less include ethylene glycol fatty acid esters such as ethylene glycol monostearate, polyethylene glycol fatty acid esters such as polyethylene glycol (2) monostearate, polyethylene glycol (5) decylpentadecyl ether. Polyethylene glycol alkyl ethers such as polyethylene glycol (5) polyethylene glycol surfactants such as polyethylene glycol hardened castor oil derivatives such as hydrogenated castor oil monoisolaurate; propylene glycol fatty acid ester, polypropylene glycol fatty acid ester, propylene glycol alkyl ether , Polypropylene glycol alkyl ether, propylene glycol alkyl ether oxidation ethylene Propylene glycol surfactants such as derivatives; Glycerin fatty acid esters such as glycerol monoisostearic acid; Glycerin alkyl ethers such as glycerol monoisostearyl ether; Sorbitan fatty acid esters such as sorbitan monostearic acid; Fatty acid alkanolamides, Diethanolamine And fatty acid dialkanolamides such as Among these, those having an HLB of 6 or less are preferable because the cleaning performance against oily soil and water-soluble soil is good.

  Of these, polyethylene glycol fatty acid esters, polyethylene glycol alkyl ethers, monoglycerin fatty acid esters, monoglycerin alkyl ethers, and sorbitan fatty acid esters are preferred because of their good cleaning performance against oily and water-soluble soils. Furthermore, monoglycerin fatty acid esters, monoglycerin alkyl ethers, and sorbitan fatty acid esters are preferable because of their good safety to the skin. Furthermore, monoglycerin alkyl ether is preferred because it has good cleaning performance against oily soil and water-soluble soil.

  The fatty alcohol has a linear or branched saturated or unsaturated hydrocarbon group having 8 to 25 carbon atoms, preferably 12 to 22 carbon atoms, and may be either a monovalent or polyhydric alcohol, such as octanol. Lauryl alcohol, myristyl alcohol, isomyristyl alcohol, palmityl alcohol, isopalmityl alcohol, stearyl alcohol, isostearyl alcohol, behenyl alcohol, oleyl alcohol, linoleyl alcohol, linolenyl alcohol and the like. Of these, lauryl alcohol, myristyl alcohol, isomyristyl alcohol, isopalmityl alcohol, isostearyl alcohol, oleyl alcohol, especially lauryl alcohol, myristyl alcohol, and isostearyl alcohol have good cleaning performance against oily and water-soluble stains. Therefore, it is preferable.

  The fatty acid may be a linear or branched saturated or unsaturated group having 8 to 25 carbon atoms, preferably 12 to 22 carbon atoms. For example, lauric acid, myristic acid, isomyristic acid, palmitic acid, isopalmitic acid , Stearic acid, behenic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid and the like. Of these, lauric acid, myristic acid, isomyristic acid, isopalmitic acid, isostearic acid, oleic acid, linoleic acid, linolenic acid, especially lauric acid, myristic acid, and isostearic acid are used to clean oily and water-soluble soils. It is preferable because the performance is good.

  The monoalkyl phosphoric acid has a linear or branched alkyl group having 8 to 25 carbon atoms, preferably 12 to 22 carbon atoms. For example, monolauryl phosphoric acid, monomyristyl phosphoric acid, monopalmityl phosphoric acid , Monostearyl phosphoric acid, monobehenyl phosphoric acid, monoisostearyl phosphoric acid, mono 2-hexyldecyl phosphoric acid and the like. Of these, monolauryl phosphoric acid, monomyristyl phosphoric acid, mono-2-hexyldecyl phosphoric acid, particularly monolauryl phosphoric acid and monomyristyl phosphoric acid are preferable because of their good cleaning performance against oily and water-soluble soils. .

  Two or more types of component (C) can be used, and are contained in the total composition in an amount of 1 to 45% by weight, preferably 1 to 40% by weight. If it is less than 1% by weight, the cleaning action and rinsing properties are poor, and if it exceeds 45% by weight, the cleaning action and rinsing properties for water-soluble soils are poor.

  Further, the hydrophilic nonionic surfactant of component (B) and the lipophilic amphiphile of component (C) used in the present invention have a weight ratio (B) / (C) of 0.5. It is preferable that it is ˜8 because of good cleaning performance against rinsing properties, oily soils and water-soluble soils.

As a water-soluble solvent of the component (D) used by this invention, a C1-C6 monohydric or polyhydric alcohol, polyethyleneglycols, polypropylene glycols, saccharides, and a water-soluble fatty acid are preferable.
Component (D) is preferably one that can increase the hydrophilicity of the hydrophilic nonionic surfactant of component (B) and the lipophilic amphiphile of component (C). Component (B) hydrophilic nonionic surfactant and component (C) a property capable of increasing the hydrophilicity of the lipophilic amphiphile are nonionic by adding component (D). This means the property of raising the cloud point (cloud point) of a surfactant, and so on. Kajitani et al., Oil Chemistry, Vol. 33, No. 3, p. 156-161 (1984) and the like.

  Examples of the monohydric alcohol having 1 to 6 carbon atoms include ethanol, propanol, isopropanol, butanol, isobutanol, and the like. Examples of the polyhydric alcohol include ethylene glycol, propylene glycol, isoprene glycol, 1,3-butylene glycol, Hexylene glycol, trimethylolpropane, glycerin, sorbit and the like can be mentioned. Of these, monohydric alcohols are ethanol, propanol, isopropanol, especially ethanol; polyhydric alcohols are propylene glycol, isoprene glycol, 1,3-butylene glycol, hexylene glycol, especially isoprene glycol, Xylene glycol is preferred because of good cleaning performance against oily and water-soluble soils.

  As the polyethylene glycols or polypropylene glycols, polyethylene glycols having a molecular weight of 1000 or less and polypropylene glycols having a molecular weight of 200 or less can be used, and examples thereof include diethylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, and diethylene glycol monobutyl ether. . Of these, dipropylene glycol, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, particularly dipropylene glycol and diethylene glycol monoethyl ether are preferable because of their good cleaning performance against oily and water-soluble soils.

  Examples of the saccharide include erythritol, pentaerythritol, methyl glucoside, ethyl glucoside, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside and the like, and alkyl glucosides having 2 or less carbon atoms in the alkyl chain are particularly preferable. Among these, methyl glucoside, ethyl glucoside, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, especially polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside have good cleaning performance against oily soil and water-soluble soil. Therefore, it is preferable.

  Examples of water-soluble fatty acids include those having 1 to 6 carbon atoms, such as acetic acid, propionic acid, and butanoic acid. Particularly, acetic acid, propionic acid, and propionic acid have good cleaning performance against oily and water-soluble soils. Therefore, it is preferable.

  Two or more kinds of component (D) can be used, and 3 to 80% by weight, preferably 5 to 70% by weight, are contained in the total composition. If it is less than 3% by weight, the cleaning action against oily soil is poor, and if it exceeds 80% by weight, the cleaning performance against oily soil is deteriorated.

  Further, the weight ratio (D) / ((B) + (C) of the total amount of the component (D) and the hydrophilic nonionic surfactant of the component (B) and the lipophilic amphiphile of the component (C). It is preferable that the value of)) is 1 or more, since the cleaning performance for oily soil and water-soluble soil is good.

  The water of component (E) is contained in the total composition in an amount of 3 to 80% by weight, preferably 5 to 75% by weight. If it is less than 3% by weight, the cleaning action and rinsing properties for water-soluble soils are poor, and if it exceeds 80% by weight, the cleaning action for oily soils is poor.

  The skin cleanser composition of the present invention further includes components usually used in cleansing agents, such as thickeners, bactericides, moisturizers, wetting agents, coloring agents, preservatives, feel improvers, fragrances, anti-inflammatory agents, A whitening agent, an antiperspirant, an ultraviolet absorber and the like can be appropriately contained.

  Regardless of the order of mixing, the skin cleansing composition of the present invention can be produced by once dissolving raw materials that are solid at room temperature and then uniformly mixing all components. In particular, it is preferably applied as a cleansing agent, a face wash or the like. Moreover, it can be used as the sheet-like article which impregnated the skin cleaning composition of this invention in base materials, such as a nonwoven fabric, and wipes off makeup dirt and sebum dirt.

  The skin cleansing composition of the present invention has an isotropic one-liquid phase having a bicontinuous structure. An isotropic one-liquid phase having a bicontinuous structure is an optically isotropic transparent or translucent low-viscosity solution in which both water and oil are continuous. Specifically, it refers to the middle phase (or D phase) and the sponge phase (or L3 phase).

  Further, in the present invention, the detergent composition having an isotropic one-liquid phase having a bicontinuous structure means that the appearance is observed, observed with an optical polarization microscope, the creation of a phase diagram, and the self-diffusion coefficient by NMR. It can be confirmed by measurement, electrical conductivity measurement, fluorescent probe method using a fluorescent dye, observation with an electron microscope (TEM, SEM, etc.) by a frozen cleaving replica method, and the like.

  Since the appearance is a transparent and low-viscosity solution state, it is possible to distinguish an isotropic one-liquid phase having a bicontinuous structure from other solutions by determining the appearance. It is also possible to confirm that the polarizing plates of the two polarizing plates are isotropic because there is no light transmission when a sample placed in a transparent container is placed between them with the polarization directions orthogonal to each other. . Furthermore, when observing with an optical polarizing microscope, it is confirmed that the polarizing plate is isotropic because there is no light transmission when the angle of the polarizing plate is 90 degrees.

  When using a quasi-ternary phase equilibrium diagram consisting of an aqueous phase (water and water-soluble solvent), an oil phase (oil-based component), and a surfactant phase (hydrophilic nonionic surfactant and lipophilic amphiphile), It can be confirmed from characteristics such as an isotropic one-liquid state on the phase diagram and a region that is not continuous from the top of the water phase or the oil phase. However, it may not be applicable depending on the substance used, the composition of the aqueous phase, and the composition of the surfactant phase.

The measurement of the self-diffusion coefficient by NMR is a method described in detail by B. Lindman et al. In J. Colloid Interface Sci. 1981, 83, 569.
The measurement of electrical conductivity is a method described in detail by M. Clausse et al. In “Microemulsion Systems” Marcel Dekker, New York, 1987, 387.
Measurement by a fluorescent probe method using a fluorescent dye is a method described in detail in Colloid Surface 1991, 56, 229 by BK Mishra et al.

  By observing with an electron microscope by the frozen cleaving replica method, an image in which a water phase and an oil phase form a continuous phase can be obtained. Specifically, a structure in which a rounded portion and a slightly planar portion are intertwined in a network shape or a layered structure in which the regions are randomly arranged can be seen. From this observation, it can be confirmed that the water phase or the oil phase alone is not a microemulsion forming a continuous phase.

In the skin cleansing composition of the present invention, (A) liquid isoparaffin, (B) polyethylene glycol monolaurate (Emanon 1112, manufactured by Kao Corporation), (C) lauryl alcohol, (D) ethanol and (E) water were used. Fig. 3 shows a phase diagram of a three component system composed of an oil phase (component (A)) / water phase (components (D) and (E)) / surfactant phase (components (B) and (C)). It is shown in 1. In the figure, C ₁₁ CO ₂ EO ₁₂ means polyethylene glycol monolaurate (EO addition mole number 12), and C ₁₂ OH means lauryl alcohol. The region of an isotropic one-liquid phase having a bicontinuous structure formed by these components is as shown by colored portions in FIG.

Example 1
Skin cleansing compositions having the compositions shown in Table 1 were produced, and the cleaning performance and rinsing performance for oily mascara and aqueous mascara were evaluated. The results are also shown in Table 1. In addition, about the oil-based component used in the Example, the viscosity in 25 degreeC was described.

(Manufacturing method)
The raw material that was liquid at normal temperature was used as it was, and the raw material that was solid at normal temperature was once dissolved, and then all components were uniformly mixed to prepare a skin cleansing composition.
The obtained skin cleanser compositions were all in an isotropic one-liquid phase from the observation of the appearance. It can be confirmed by measuring the self-diffusion coefficient by NMR or the like that it has a bicontinuous structure.

(Evaluation methods)
(1) Cleaning performance:
The cleaning performance for oil-based mascara is about 10 mg of skin cleanser composition after applying 10 mg of waterproof mascara (Maybelin, Full and Soft Mascara Waterproof 01 Black) to the arm, with a certain force and speed. And massaged 10 times, rinsed with 30 ° C. water, and evaluated according to the following criteria. Moreover, the washing | cleaning performance with respect to the aqueous mascara was similarly evaluated using the aqueous type mascara (The Shiseido company make, Piemore glamorous mascara BK999).
○: Almost clean.
Δ: A little cleaning was possible.
X: Almost no washing was possible.

(2) Rinsing performance:
About 2 g of the skin cleansing composition was applied to the forearm and evaluated for ease of rinsing when rinsed with warm water.
○: The slimy feeling disappears and it is easy to wash away.
Δ: Stickiness remains and is not easily washed away.
X: The oil remains on the skin indefinitely and cannot be washed away.

Example 2
Skin cleansing compositions having the compositions shown in Table 2 and Table 3 were produced in the same manner as in Example 1, and the cleaning performance and rinsing performance for oily mascara and aqueous mascara were evaluated. Moreover, about the obtained skin cleaning composition, the phase state was confirmed by observation of an external appearance, the measurement of the self-diffusion coefficient by NMR, etc. The results are shown in Tables 2 and 3.

In the skin cleansing composition of this invention, it is a figure which shows an example of the phase diagram of the 3 component type | system | group comprised by an oil phase / water phase / surfactant phase.

Claims (10)

  (A) 3 to 80% by weight of oil component, (B) 1 to 45% by weight of hydrophilic nonionic surfactant, (C) 1 to 45% by weight of lipophilic amphiphile, (D) 3 to water-soluble solvent 3 A skin cleanser composition having an isotropic one-component phase containing 80% by weight and (E) 3-80% by weight of water and having a bicontinuous structure.   The skin cleansing composition according to claim 1, wherein the oily component of component (A) has a viscosity at 25 ° C of 30 mPa · s or less.   Oil component of component (A) is liquid paraffin, liquid isoparaffin, neopentyl glycol dicaprate, isopropyl isostearate, cetyl 2-ethylhexanoate, isononyl isononanoate, tri (caprylic acid / capric acid) glycerin, alkyl-1, The skin cleanser composition according to claim 1 or 2, which is selected from 3-dimethylbutyl ether, decamethylcyclopentasiloxane, and octamethylcyclotetrasiloxane.   The skin cleansing composition according to any one of claims 1 to 3, wherein the oily component of component (A) is hydrogenated polyisobutene having a degree of polymerization of isobutene of 3 to 6.   The skin cleansing composition according to any one of claims 1 to 4, wherein the hydrophilic nonionic surfactant of component (B) has an HLB of more than 8 and a hydrophobic group having 8 or more carbon atoms. .   The hydrophilic nonionic surfactant of component (B) is selected from polyethylene glycol fatty acid ester, polyethylene glycol alkyl ether, polyethylene glycol sorbitan fatty acid ester, sucrose fatty acid ester and alkyl polyglucoside. The skin cleanser composition of any one of Claims.   The skin cleansing composition according to any one of claims 1 to 6, wherein the hydrophilic nonionic surfactant of component (B) is selected from polyethylene glycol fatty acid esters and alkylpolyglucosides.   Component (C) having a lipophilic amphiphilic substance having a nonionic surfactant having an HLB of 8 or less, a fatty alcohol having 8 to 25 carbon atoms, a fatty acid having 8 to 25 carbon atoms and an alkyl group having 8 to 25 carbon atoms The skin cleansing composition according to any one of claims 1 to 7, which is selected from alkyl phosphoric acids.   The water-soluble solvent of component (D) is selected from ethanol, isoprene glycol, hexylene glycol, dipropylene glycol, diethylene glycol monoethyl ether, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside and propionic acid. The skin cleanser composition of any one of 1-8. Weight ratio ((D) / ((B) + (C) of water-soluble solvent of component (D) and hydrophilic nonionic surfactant of component (B) and lipophilic amphiphile of component (C) The skin cleansing composition according to any one of claims 1 to 9, wherein the value of))) is 1 or more.

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