WO2018221529A1 - Liquid skin cleanser - Google Patents

Abstract

This liquid skin cleanser contains the following components (A), (B), (C), (D), (E) and (F), where the mass ratio of component (B) to component (C), (B)/(C), is 5/3 to 10. (A) 5 to 18 mass% of fatty acid salt (B) 2.2 to 7 mass% of anionic surfactant other than component (A) (C) 0.2 to 4 mass% of amphoteric surfactant (D) 0.2 to 7 mass% of carbonate (E) 0.1 to 10 mass% of polyol (F) water

Description

Liquid skin cleanser

The present invention relates to a liquid skin cleanser.

Liquid skin cleansers have been widely used in recent years because they have good melting and disintegration properties, excellent foaming, and can easily clean the skin as compared to soap bars (for example, Patent Document 1).
However, the conventional liquid skin cleanser has a problem that it comes out of the container or is excessively used, and higher cleanability has been demanded as a consumer demand. For this reason, the present applicant uses a fatty acid salt, other anionic surfactants and amphoteric surfactants, and further uses a water-soluble polymer and a carbonate in combination at a specific ratio, so that an appropriate amount can be obtained from the container. We have developed a liquid skin cleanser that is easy to take out, melts quickly, has excellent cleaning power, and provides a refreshing feeling (Patent Document 2).

(Patent Document 1) JP-T 2009-529588 (Patent Document 2) International Publication No. 2013/204092

The present invention includes the following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt 5-18% by mass,
(B) Anionic surfactant other than component (A) 2.2-7% by mass,
(C) amphoteric surfactant 0.2-4% by mass,
(D) Carbonate 0.2-7% by mass,
(E) polyol 0.1 to 10% by mass,
(F) A liquid skin cleanser containing water and having a mass ratio (B) / (C) of component (B) to component (C) of 5/3 to 10.

Detailed Description of the Invention

In the conventional skin cleanser, from the viewpoint of improving the smoothness of the skin after washing, when a lot of anionic surfactants other than fatty acid salts are blended, there is a tendency to thicken when water is added. A problem has been found in which the familiarity with water is significantly reduced, rinsing residue is generated, and it is easy to get wet, and it takes time to rinse.

Therefore, the present inventors use fatty acid salts, other anionic surfactants, amphoteric surfactants and carbonates, and further use a combination of polyols in a specific ratio, so that the smoothness of the washed-out skin can be obtained. It has been found that a liquid skin cleanser that improves the compatibility of the preparation with water and solves the above problems can be obtained.

The liquid skin cleanser of the present invention can suppress thickening even when water is added and has good compatibility with water, so there is no rinsing residue when rinsing, no slickness, and quick rinsing can be completed. Moreover, foaming and detergency are good, and the skin after washing is smooth.

As fatty acid salt of component (A), general formula (1)

(Wherein R ¹ represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms, and X represents an alkali metal, ammonium, alkanolamine-derived ammonium or basic amino acid)
The thing represented by these is preferable.
More specifically, for example, salts such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, behenic acid and the like can be mentioned. Among these, from the viewpoint of improving detergency and foaming, it preferably contains at least one selected from the salts of lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, lauric acid, myristic acid, palmitic acid. More preferably, it contains at least one selected from acids.
Examples of these salts include alkali metals such as sodium and potassium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine, and triethanolamine; and basic amino acids such as arginine and lysine. Among these, from the viewpoint of achieving both good compatibility with water and detergency, it is preferable to include at least one selected from sodium, potassium, ammonium and arginine, and at least one selected from potassium and arginine. More preferably, it contains at least potassium.

The fatty acid salt of the component (A) can be present in the composition by, for example, mixing an unneutralized fatty acid and a neutralizing agent in the composition to form a fatty acid salt.
The neutralizing agent is a basic compound, and examples thereof include sodium hydroxide, potassium hydroxide, triethanolamine, and basic amino acids. Among these, from the viewpoint of improving the detergency and improving the familiarity with water, it is preferable to include at least one selected from potassium hydroxide and sodium hydroxide, and to include at least potassium hydroxide. More preferred.

The fatty acid salt of the component (A) can be used singly or in combination of two or more, and suppresses the increase in viscosity during addition of water, and improves foaming, familiarity with water, and smoothness of the skin. Therefore, the content is 5% by mass or more, preferably 6.5% by mass or more, more preferably 8% by mass or more, and further preferably 10% by mass or more in the liquid skin cleanser as a fatty acid equivalent value. It is preferably at most 16 mass%, more preferably at most 15 mass%, further preferably at most 12 mass%. The content of the component (A) is 5 to 18% by mass, preferably 6.5 to 16% by mass, more preferably 8 to 15% by mass in the liquid skin cleanser as the fatty acid. More preferred is mass%.

The anionic surfactant of the component (B) is not limited to the component (A) and may be any one used for a normal skin cleanser, such as alkylbenzene sulfonate, alkane sulfonate, alkenyl sulfonate. , Alkyl sulfonate, acyl isethionate, alkyl sulfate ester salt, alkyl ether sulfate ester salt, alkyl sulfosuccinate, sulfo fatty acid methyl ester salt, fatty acid alkanolamide sulfate ester, monoacylglycerol sulfate ester, alkyl phosphate ester Examples thereof include salts, polyoxyethylene alkyl ether phosphates, alkyl aryl ether phosphates, fatty acid amide ether phosphates, ether carboxylic acids or salts thereof, and N-acyl amino acid salts.

Among these, from the viewpoint of improving foaming, detergency, and smoothness of the skin, it is preferable to include at least one selected from alkyl sulfate ester salts, alkyl ether sulfate ester salts, and ether carboxylic acids or salts thereof. It is more preferable to include two kinds, and it is particularly preferable to include at least an alkyl sulfate ester salt and / or an alkyl ether sulfate ester salt and an ether carboxylate.

Examples of the alkyl sulfate salts that can be used as the component (B) include alkyl sulfate salts represented by the following general formula (2).
R ² OSO ₃ M ² (2)
(In the formula (2), R ² represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms, and M ² is selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium, and glucammonium. Indicates a cation)

In general formula (2), R ² is preferably an aliphatic hydrocarbon group having 8 to 18 carbon atoms, more preferably an aliphatic hydrocarbon group having 8 to 16 carbon atoms, from the viewpoint of improving foaming and detergency. An aliphatic hydrocarbon group having 10 to 16 carbon atoms is more preferable. Further, an alkyl group or alkenyl group having 8 to 16 carbon atoms is preferable, an alkyl group or alkenyl group having 10 to 16 carbon atoms is more preferable, and an alkyl group or alkenyl group having 10 to 14 carbon atoms is still more preferable.
M ² is preferably an alkali metal or ammonium, more preferably an alkali metal, and even more preferably a sodium salt, from the same viewpoint as described above.

Specific examples of the alkyl sulfate salt include sodium lauryl sulfate, trilauramine lauryl sulfate, ammonium lauryl sulfate, sodium myristyl sulfate, sodium cetyl sulfate, sodium stearyl sulfate, sodium oleyl sulfate, triethanolamine oleyl sulfate and the like. It is done. Among these, it is preferable to include at least one selected from sodium lauryl sulfate, triethanolamine lauryl sulfate, and ammonium lauryl sulfate. One of these compounds may be used alone, or two or more may be used in combination.
Moreover, as a commercial item of this alkyl sulfate ester salt, for example, Emar 0S (manufactured by Kao Corporation, sodium lauryl sulfate), Emar 10PT (manufactured by Kao Corporation, sodium lauryl sulfate), Emar TD (manufactured by Kao Corporation, triethanol lauryl sulfate) Amine), Emar AD-25R (manufactured by Kao Corporation, ammonium lauryl sulfate) and the like.

Examples of the alkyl ether sulfate salt that can be used as the component (B) include alkyl ether sulfate salts represented by the following general formula (3).
R ³ O (CH ₂ CH ₂ O) _n SO ₃ M ³ (3)
(In the formula (3), R ³ represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms, and M ³ is selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium, and glucammonium. Represents a cation, n represents the average number of moles added, and is 0.5 to 20)

In general formula (3), R ³ is preferably an aliphatic hydrocarbon group having 8 to 18 carbon atoms, more preferably an aliphatic hydrocarbon group having 8 to 16 carbon atoms, from the viewpoint of improving foaming and detergency. An aliphatic hydrocarbon group having 10 to 16 carbon atoms is more preferable. Further, an alkyl group or alkenyl group having 8 to 16 carbon atoms is preferable, an alkyl group or alkenyl group having 10 to 16 carbon atoms is more preferable, and an alkyl group or alkenyl 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, preferably 12 or less, preferably 5 or less, more preferably 4 or less, and still more preferably 2 or less. A specific range of n is preferably 0.5 to 12, more preferably 0.5 to 5, further preferably 0.5 to 4, and still more preferably 0.5 to 2.
M ³ is preferably an alkali metal or ammonium, more preferably an alkali metal, and even more preferably a sodium salt, from the same viewpoint as described above.

Specific examples of the alkyl ether sulfate ester salt include polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, polyoxyethylene (1) sodium myristyl ether sulfate, polyoxyethylene ( 2) 1 type, or 2 or more types chosen from sodium lauryl ether sulfate and polyoxyethylene (2) sodium myristyl ether sulfate are mentioned. Among these, it is preferable to include at least one selected from polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, and polyoxyethylene (2) sodium lauryl ether sulfate. In addition, in this specification, the numerical value in the parenthesis of these compounds means the average added mole number of ethylene oxide.
Moreover, as a commercial item of this alkyl ether sulfate ester salt, for example, Emar 125HP (manufactured by Kao Corporation, polyoxyethylene (1) sodium lauryl ether sulfate), Emar 125A (manufactured by Kao Corporation, polyoxyethylene (1) ammonium lauryl ether sulfate) ), Emar 227 (manufactured by Kao Corporation, polyoxyethylene (2) sodium lauryl ether sulfate) and the like.

Examples of the ether carboxylic acid or a salt thereof that can be used as the component (B) include an ether carboxylic acid represented by the following general formula (4) or a salt thereof.
R ⁴ O (CH ₂ CH ₂ O) _m CH ₂ COOM ⁴ (4)
(In the formula (4), R ⁴ represents an alkyl or alkenyl group having 10 to 22 carbon atoms, m represents an average added mole number, and represents a number of 0.5 to 10, M ⁴ represents a hydrogen atom, an alkali metal Represents alkaline earth metal, ammonium or organic ammonium)

In general formula (4), R ⁴ is preferably an alkyl group having 12 to 16 carbon atoms and more preferably an alkyl group having 12 to 14 carbon atoms from the viewpoint of improving foaming and detergency.
From the same viewpoint as described above, the average number of moles m of ethylene oxide added is preferably 2 to 5.
M ⁴ includes 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; arginine and lysine Examples include ammonium derived from basic amino acids. Among these, from the same viewpoint as described above, one or more selected from sodium, potassium, triethanolamine, and arginine are preferable, and one or two selected from sodium and potassium are more preferable. .

Examples of the ether carboxylic acid or a salt thereof include, from the same viewpoint as described above, specifically, polyoxyethylene lauryl ether carboxylic acid or a salt thereof, polyoxyethylene myristyl ether carboxylic acid or a salt thereof, and polyoxyethylene palmityl. It is preferable that 1 type or 2 or more types selected from ether carboxylic acid or its salt is included, Polyoxyethylene lauryl ether carboxylic acid or its salt, and 1 type selected from polyoxyethylene myristyl ether carboxylic acid or its salt Or it is preferable that 2 types are included, and it is still more preferable that polyoxyethylene lauryl ether carboxylic acid or its salt is included.
Moreover, as a commercial item of this ether carboxylic acid or its salt, AKYPO RLM 45CA (made by Kao Corporation), AKYPO LM 26C (made by Kao Corporation) etc. are mentioned, for example.

Component (B) can be used alone or in combination of two or more, and from the viewpoint of improving foaming, detergency, and smoothness of the skin, the content is 2.2 mass in the liquid skin cleanser. % Or more, preferably 2.5% by mass or more, more preferably 3.2% by mass or more, further preferably 3.8% by mass or more, 7% by mass or less, and preferably 6.6% by mass or less, 6.2 mass% or less is more preferable, and 4.8 mass% or less is further more preferable. The content of component (B) is 2.2 to 7% by mass in the liquid skin cleanser, preferably 2.5 to 6.6% by mass, more preferably 3.2 to 6.2% by mass. It is preferably 3.8 to 4.8% by mass.

The amphoteric surfactant of component (C) may be any as long as it is used in ordinary skin cleansing agents, for example, betaine acetate type surfactants such as lauryldimethylaminoacetic acid betaine and stearyldimethylaminoacetic acid betaine; Amine oxide type surfactants such as lauryl dimethylamine oxide; Imidazolinium betaine type surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine; Amidopropyl betaine laurate, palm oil fatty acid Examples include amide betaine-type surfactants such as amidopropyl betaine; sulfobetaine-type surfactants such as lauryl hydroxysulfobetaine.
Among these, from the viewpoint of improving foaming and suppressing luster during rinsing, it contains at least one selected from an acetate betaine surfactant, a sulfobetaine surfactant, and an amide betaine surfactant. Preferably, it contains at least one selected from sulfobetaine surfactants and amide betaine surfactants, and more preferably contains at least a sulfobetaine surfactant. More specifically, it preferably contains at least one selected from lauryl dimethylaminoacetic acid betaine, stearyldimethylaminoacetic acid betaine, lauryl hydroxysulfobetaine and lauric acid amidopropyl betaine, and lauryl hydroxysulfobetaine and lauric acid amidopropyl betaine More preferably, at least one selected from the group consisting of lauryl hydroxysulfobetaine is more preferable.

Component (C) can be used singly or in combination of two or more, and suppresses the increase in viscosity during addition, improves the familiarity with water, improves foaming, and suppresses the stickiness during rinsing Therefore, the content in the liquid skin cleanser is 0.2% by mass or more, preferably 0.4% by mass or more, more preferably 1.0% by mass or more, and further preferably 1.4% by mass or more, It is 4.0 mass% or less, 2.5 mass% or less is preferable, 1.9 mass% or less is more preferable, and 1.6 mass% or less is still more preferable. The content of component (C) is 0.2 to 4.0% by mass in the liquid skin cleanser, preferably 0.4 to 2.5% by mass, and 1.0 to 1.9% by mass. Is more preferable, and 1.4 to 1.6% by mass is even more preferable.

In the present invention, the mass ratio (B) / (C) of the component (B) to the component (C) is 5/3 or more from the viewpoint of improving the familiarity with water and foaming, and suppressing the luster during rinsing. 1.7 or more is preferable, 2.2 or more is more preferable, 2.8 or more is more preferable, 10 or less is preferable, 6 or less is preferable, 4.3 or less is more preferable, and 3.3 or less is further more preferable. The mass ratio (B) / (C) of the component (B) to the component (C) is 5/3 to 10, preferably 1.7 to 6, more preferably 2.2 to 4.3, 2.8 to 3.3 is more preferable.

Examples of the carbonate of component (D) include alkali metal salts such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate; alkali metal salts such as calcium carbonate, magnesium carbonate and magnesium hydrogen carbonate; ammonium carbonate and carbonic acid Examples include ammonium salts such as ammonium hydrogen.
Of these, sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate from the viewpoint of making the properties of the liquid skin cleansing agent water-soluble, and making the composition easy to take out as well as foaming and detergency. At least one selected from the group consisting of at least one of sodium carbonate and potassium carbonate, and more preferably at least one of sodium bicarbonate and potassium bicarbonate, more preferably sodium carbonate and sodium bicarbonate. .

Component (D) can be used singly or in combination of two or more, from the viewpoint of improving the familiarity with water and the smoothness of the skin, and suppressing the decrease in the viscosity of the liquid skin cleanser. The content in the liquid skin cleanser is 0.2% by mass or more, preferably 0.4% by mass or more, more preferably 1% by mass or more, still more preferably 1.8% by mass or more, and 7% by mass or less. 5 mass% or less is preferable, 3.5 mass% or less is more preferable, and 2.5 mass% or less is further more preferable. The content of component (D) is 0.2 to 7% by mass in the liquid skin cleanser, preferably 0.4 to 5% by mass, more preferably 1 to 3.5% by mass. More preferably, it is 8 to 2.5% by mass.

The polyol of component (E) is not particularly limited as long as it is used in a normal skin cleanser composition, and examples thereof include hydroxyl groups such as glycerin, diglycerin, sorbitol, mannitol, erythritol, xylitol, maltitol, trehalose, sucrose, and the like. Polyols containing 3 or more (polyhydric or higher polyols); ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, isoprene glycol, polyethylene glycol (average molecular weight of 2000 or less ) And polyols (divalent polyols) containing two hydroxyl groups such as polypropylene glycol (average molecular weight of 1500 or less).
Among these, from the viewpoint of improving familiarity with water and foaming, the trivalent or higher polyol preferably contains one or more selected from glycerin, diglycerin, sorbitol and maltitol. And one or two selected from diglycerin are more preferable, and glycerin is further preferable. The divalent polyol preferably contains one or more selected from ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol and isoprene glycol. , Propylene glycol, 1,3-propanediol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, and more preferably one or more selected from propylene glycol, dipropylene glycol, 1,3- More preferably, it contains one or more selected from butylene glycol.

As the component (E), a divalent polyol is preferably included from the viewpoint of suppressing an increase in the viscosity of the liquid skin cleansing agent upon addition and improving the familiarity with water. In addition, when the component (E) contains a trivalent or higher polyol, it is preferable to include at least a divalent polyol in the polyol, more preferably 5% by mass or more of the divalent polyol in the polyol. More preferably, the content is 10% by mass or more.

Component (E) can be used singly or in combination of two or more, from the viewpoint of suppressing the increase in viscosity during addition of the liquid skin cleansing agent, making it familiar with water and improving foaming, Is 0.1% by mass or more in the liquid skin cleanser, preferably 0.4% by mass or more, more preferably 0.7% by mass or more, still more preferably 0.9% by mass or more, and 10% by mass or less. 7.5 mass% or less is preferable, 3 mass% or less is more preferable, and 1.8 mass% or less is further more preferable. The content of component (E) is 0.1 to 10% by mass in the liquid skin cleanser, preferably 0.4 to 7.5% by mass, more preferably 0.7 to 3% by mass, More preferred is 0.9 to 1.8% by mass.

In the present invention, the mass ratio (B) / (E) of the component (B) to the component (E) is 0.5% from the viewpoint of suppressing the thickening at the time of water addition and making the water familiar and foaming better. The above is preferable, 0.6 or more is more preferable, 2.5 or more is more preferable, 10 or less is preferable, 6 or less is more preferable, and 5 or less is more preferable. In addition, the mass ratio (B) / (E) of the component (B) to the component (E) is preferably 0.5 to 10, more preferably 0.6 to 6, and further preferably 2.5 to 5.

Water of component (F) is used as a solvent, and the content is preferably 40% by mass or more, more preferably 50% by mass or more, further preferably 54% by mass or more, and 90% by mass or less in the liquid skin cleanser. Preferably, 85 mass% or less is more preferable, and 80 mass% or less is further more preferable. Further, the content of the component (F) is preferably 40 to 90% by mass, more preferably 50 to 85% by mass, and further preferably 54 to 80% by mass in the liquid skin cleanser.
In the present invention, since the carbonate of component (D) is contained in the composition, when an acid is present in the composition, the carbonate of component (D) reacts with the acid to generate carbon dioxide. However, an appropriate viscosity cannot be realized, and it is difficult to achieve both an appropriate take-out ease and a melt-disintegrating property. For this reason, when not only a component (A) but other components (for example, a postscript component (G) etc.) are acidic components, it is preferable to neutralize.
The neutralization ratio with respect to the sum of the component (A) and the other acidic components is preferably 0.90 to 1.10, and preferably 0.95 to 1.05 from the viewpoint of improving both ease of taking out and the ability to melt. Is more preferable.

The liquid skin cleanser of the present invention can further contain (G) a water-soluble polymer, and can improve foaming and smoothness of the skin.
Any water-soluble polymer may be used as long as it is used for a normal skin cleanser.
Examples of the water-soluble polymer include acrylic acid / alkyl (meth) acrylate copolymer, cellulose to which a hydroxyethyl group or a hydroxypropyl group is added, a highly polymerized polyalkylene glycol, and a cationic polymer.

Examples of the acrylic acid / (meth) acrylic acid alkyl copolymer include acrylic acid / alkyl acrylate crosspolymers, and examples thereof include Pemlen TR-1, Pemlen TR-2, Carbopol ETD2020, Carbopol 1382, Carbopol. Commercially available products such as 1342 (above, Lubrizol Advanced Materials), AQUPEC HV-501ER (Sumitomo Seika) can be used.

The cellulose to which a hydroxyethyl group or a hydroxypropyl group is added is one in which a part of hydrogen atoms in the hydroxyl group of cellulose is substituted with a hydroxyethyl group or a hydroxypropyl group, and may have a substituent other than these. good.
Specific examples include hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, and the like.
These are made by reacting cellulose with caustic soda to make alkaline cellulose, then methyl chloride, monochloroacetic acid, ethylene oxide, propylene oxide, etc., and the hydrogen atom in the hydroxyl group of cellulose is hydroxyethyl group, hydroxypropyl group, methyl group, It is obtained by substitution with a carboxymethyl group or the like.

These celluloses have an average degree of substitution greater than 0, more preferably 0.5 or more, preferably 3 or less, and more preferably 2 or less, from the viewpoint of improving foamability and foam persistence. In addition, the weight average molecular weight is preferably 200,000 or more, more preferably 500,000 or more, and more preferably 650,000 or more from the viewpoint of improving the solubility in the liquid detergent composition, foamability and foam persistence. Preferably, 3,000,000 or less is preferable, 2,000,000 or less is more preferable, and 1,600,000 or less is still more preferable.
In the present invention, the average degree of substitution is determined by NMR, and the weight average molecular weight is determined by using a gel permeation chromatography (GPC) -multi-angle laser light scattering detector (MALLS) system with polyethylene oxide as the standard substance. Measured by

The cellulose to which a hydroxyethyl group or a hydroxypropyl group is added is preferably hydroxyethyl cellulose or hydroxypropyl methylcellulose, preferably having an average degree of substitution of 0.5 to 2 and a weight average molecular weight of 650,000 to 1,600,000. .

Examples of the cellulose to which a hydroxyethyl group or a hydroxypropyl group is added include, for example, CELLOSIZE QP52000H (manufactured by Dow Chemical Co., Ltd.), HEC Daicel SE400, SE500, SE600, SE850, SE900 (manufactured by Daicel Finechem), etc. ; For hydroxypropylmethylcellulose, commercially available products such as METOLOSE 60SH, 65SH (manufactured by Shin-Etsu Chemical Co., Ltd.), BENECEL E50, E4M, E10M, F4MC, K99C, K4M, K15M, K35M, K100M, K200M (above, manufactured by ASLAND) Goods can be used.

In the present invention, the highly polymerized alkylene glycol is a polyalkylene glycol having a weight average molecular weight of 20,000 or more. From the viewpoint of improving foaming and foam amount, the weight average molecular weight is preferably 400,000 or more, more preferably 1,000,000 or more. More preferably, 1.5 million or more is more preferable, 5 million or less is preferable, 3.5 million or less is more preferable, and 2.5 million or less is further preferable. Further, the carbon number of the alkylene group in the highly polymerized polyalkylene glycol is preferably 2 to 6, more preferably 2 to 4 from the same viewpoint, and the specific alkylene group is preferably an ethylene group or a propylene group, An ethylene group is more preferable.
Specific examples of highly polymerized alkylene glycols include POLYOX WSR N-10, POLYOX WSR N-60K (weight average molecular weight 2 million, manufactured by Dow Chemical Co.), ALKOX E-100 (weight average molecular weight 3 million, Meisei Chemical) Commercial products such as Kogyo Kogyo Co., Ltd.), ALKOX E-30G (weight average molecular weight 400,000, manufactured by Meisei Chemical Industry Co., Ltd.), ALKOX E-240 (weight average molecular weight 5 million, manufactured by Meisei Chemical Co., Ltd.) can be used. .

The cationic polymer is a polymer containing an amino group, an imidazolyl group, a pyridyl group, a salt thereof, or a quaternized salt. From the viewpoint of improving the familiarity with water, foaming, and smoothness of the skin, The charge density is preferably 2 meq / g or more, more preferably 2 to 8 meq / g, still more preferably 3 to 7 meq / g.
Here, the cation charge density refers to the equivalent number (meq / g) of cation charge in the monomer unit constituting the polymer.

Examples of such a cationic polymer include a homopolymer of dimethyl diallylammonium chloride; a copolymer of dimethyl diallylammonium chloride and other monomers such as (meth) acrylic acid, (meth) acrylic ester, (meth) acrylamide; Examples thereof include polychlorinated methacryloyloxyethyl trimethyl ammonium chloride.

More specifically, a homopolymer of dimethyldiallylammonium chloride (Mercoat 100; manufactured by NALCO: charge density 6.2 meq / g), a copolymer of dimethyldiallylammonium chloride and acrylic acid (Mercoat 295; manufactured by NALCO: charge) Density 5.9 meq / g), copolymer of dimethyldiallylammonium chloride and acrylic acid (Mercoat 280; manufactured by NALCO: charge density 5.0 meq / g), copolymer of dimethyldiallylammonium chloride and acrylamide (Mercoat 550; NALCO: charge density 3.2 meq / g), polychlorinated methacryloyloxyethyltrimethylammonium chloride (Kao Corporation: charge density 4.8 meq / g), copolymer of methylvinylimidazolium chloride and vinylpyrrolidone (rubicut excelence) ; B ASF Co., Ltd .: charge density 6.1 meq / g, Rubycut FC550; BASF Co., Ltd .: charge density 4.4 meq / g).

As cationic polymers, dimethyldiallylammonium chloride homopolymer, copolymer of dimethyldiallylammonium chloride and acrylic acid, dimethyldiallylammonium chloride and acrylamide from the viewpoint of improving the familiarity with water, foaming and smoothness of the skin. These copolymers are preferred.

The water-soluble polymer of the component (G) preferably contains at least a cationic polymer from the viewpoint of improving the familiarity with water, foaming, and smoothness of the skin. The cationic polymer and acrylic acid (meth) It is more preferable to include one or two or more kinds selected from alkyl acrylate copolymers, cellulose to which hydroxyethyl groups or hydroxypropyl groups are added, and highly polymerized polyalkylene glycols, cationic polymers, hydroxyethyl groups or hydroxy More preferably, it contains cellulose having a propyl group added thereto and a highly polymerized polyalkylene glycol.
More specifically, homopolymers of dimethyldiallylammonium chloride, copolymers of dimethyldiallylammonium chloride and acrylic acid, copolymers of dimethyldiallylammonium chloride and acrylamide, polymethacryloyloxyethyltrimethylammonium chloride and methylvinylimidazo chloride. It is preferable to include one or more selected from a copolymer of lithium and vinylpyrrolidone, a homopolymer of dimethyldiallylammonium chloride, a copolymer of dimethyldiallylammonium chloride and acrylic acid, dimethyldiallylammonium chloride and acrylamide Copolymers of polymethacryloyloxyethyltrimethylammonium chloride and methylvinylimidazolium chloride and vinylpyrrolidone 1 type or 2 types or more selected from coalescence and 1 type or 2 or more types selected from acrylic acid / alkyl acrylate crosspolymer, hydroxyethyl cellulose, hydroxypropyl methylcellulose, highly polymerized polyethylene glycol and highly polymerized polypropylene glycol More preferably, dimethyldiallylammonium chloride homopolymer, dimethyldiallylammonium chloride and acrylic acid copolymer, dimethyldiallylammonium chloride and acrylamide copolymer, polymethacryloyloxyethyltrimethylammonium chloride and methylvinylimidazo chloride One or more selected from a copolymer of lithium and vinylpyrrolidone, and hydroxyethylcellulose or hydroxypropylmethylcellulose Graphics and further preferably includes a high polymer polyethylene glycol or highly polymerized polypropylene glycol.

Ingredient (G) is preferably 0.01% by mass or more, preferably 0.05% by mass or more in the liquid skin cleanser, from the viewpoint of improving the familiarity with water, foaming, and smoothness of the skin. More preferably, 0.1% by mass or more is more preferable, 1.5% by mass or less is preferable, 0.8% by mass or less is more preferable, and 0.3% by mass or less is more preferable. Further, the content of the component (G) is preferably 0.01 to 1.5% by mass, more preferably 0.05 to 0.8% by mass, and 0.1 to 0.3% by mass in the liquid skin cleanser. % Is more preferable.

The liquid skin cleansing agent of the present invention can further contain (H) a nonionic surfactant, and can improve foaming and detergency.
Nonionic surfactants include polyglycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene polyoxypropylene glycol, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyoxyethylene Ethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene hydrogenated castor oil fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkyl ether fatty acid ester, sucrose fatty acid ester, alkyl polyglucoside, (poly) alkyl glyceryl ether, And alkyl alkanolamides.
Among these, from the viewpoint of improving foaming and softness of the skin, the HLB of the nonionic surfactant is preferably 8 or more, more preferably 9 or more, further preferably 9.5 or more, and 18 or less. Is preferable, 16 or less is more preferable, and 14 or less is more preferable. In addition, the HLB of the component (H) is preferably 8 to 18, more preferably 9 to 16, and further preferably 9.5 to 14.
In the present invention, HLB (Hydrophile-Lipophilic Balance) is calculated by (Σinorganic value / Σorganic) × 10. Here, for each of the “inorganic value” and “organic value”, for example, “organic value” is 20 for one carbon atom in the molecule, and “inorganic value” is 100 for one hydroxyl group. As described above, “inorganic value” and “organic value” corresponding to various atoms or functional groups are set, and “inorganic value” and “organic value” of all atoms and functional groups in the organic compound. Is calculated to calculate the IOB value of the organic compound (for example, Yoshio Koda, “New Edition Organic Conceptual Diagram: Basics and Applications”, pages 3 to 17, pages 95 to 102, Sankyo Publishing, 1984) reference). The HLB of the mixed surfactant using two or more kinds of surfactants is obtained by weighted averaging the HLB of each surfactant based on the blending ratio.

As the nonionic surfactant of component (H), from the viewpoint of improving foam quality and detergency, polyglycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, It preferably contains one or more selected from polyoxyethylene hydrogenated castor oil fatty acid ester, polyoxyethylene alkyl ether, alkyl polyglucoside and alkyl alkanolamide, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, alkyl It is more preferable to include one or more selected from polyglucoside and alkylalkanolamide, and it is more preferable to include alkylalkanolamide.

Examples of the alkyl alkanol amide that can be used as the component (H) include alkyl alkanol amides represented by the following general formula (5).

(Wherein R ⁵ CO represents an acyl group having 8 to 20 carbon atoms, and R ⁶ represents a hydrogen atom, a methyl group or a hydroxyethyl group)

In the general formula (5), R ⁵ CO is preferably an acyl group having 8 to 20 carbon atoms, and more preferably an acyl group having 10 to 18 carbon atoms. R ⁶ is preferably a hydrogen atom or a methyl group.

Examples of commercially available polyethylene glycol fatty acid esters include polyethylene glycol monolaurate (12EO) (Emanon 112 (HLB13.7), manufactured by Kao Corporation).
Commercially available polyoxyethylene alkyl ethers include polyoxyethylene (21) lauryl ether (Emulgen 121-G (HLB15.0), manufactured by Kao Corporation), polyoxyethylene (9) lauryl ether (Emulgen 109P (HLB12.0). ), Manufactured by Kao Corporation, polyoxyethylene (20) octyldodecyl ether (Emulgen 2020G (HLB13.0), manufactured by Kao Corporation), polyoxyethylene (25) octyldodecyl ether (Emulgen 2025G (HLB15.6), Kao Corporation Manufactured) and the like.
As a commercially available product of alkylpolyglucoside, decyl glucoside (Mydol 10 (HLB14.0), manufactured by Kao Corporation), lauryl glucoside (Mydol 12 (HLB14.6), manufactured by Kao Corporation) and the like are preferable.
Examples of commercially available alkyl alkanolamides include cocamide MEA (Aminone C01-S (HLB10.7), manufactured by Kao Corporation), Lauramide DEA (Aminone L-02 (HLB12.5), manufactured by Kao Corporation), and the like.

The content of component (H) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and more preferably 0.5% by mass or more in the liquid skin cleanser from the viewpoint of improving foaming and detergency. Is more preferable, 5 mass% or less is preferable, 3 mass% or less is more preferable, and 1 mass% or less is more preferable. The content of component (H) is preferably 0.05 to 5% by mass, more preferably 0.1 to 3% by mass, and further preferably 0.5 to 1% by mass in the liquid skin cleanser.

The liquid skin cleanser of the present invention can further contain (I) a pearl agent, and can improve the glossiness of the preparation and the familiarity with water.
As the pearl agent, specifically, a glycol difatty acid ester is preferable, and at least one selected from ethylene glycol dioleate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate is more preferable. More preferred is at least one selected from ethylene glycol dioleate, ethylene glycol dilaurate and ethylene glycol distearate.

The content of component (I) is preferably 0.01% by mass or more, more preferably 0.1% by mass or more in the liquid skin cleanser from the viewpoint of improving the glossiness of the preparation and the familiarity with water. 0.4 mass% or more is further preferable, 4 mass% or less is preferable, 3 mass% or less is more preferable, and 2 mass% or less is further more preferable. The content of component (I) is preferably 0.01 to 4% by mass, more preferably 0.1 to 3% by mass, and further preferably 0.4 to 2% by mass in the liquid skin cleanser.

The liquid skin cleanser of the present invention further contains components other than the components used in ordinary cleansing agents, for example, surfactants other than components (A), (B), (C) and (H), and components (E). Contains moisturizers, oily ingredients, bactericides, anti-inflammatory agents, antiseptics, chelating agents, thickeners, salts, scrub agents, fragrances, chilling agents, pigments, UV absorbers, antioxidants, plant extracts, etc. be able to.

The liquid skin cleanser of the present invention can contain an oily component from the viewpoint of improving rinsing properties. The oil component is preferably 3% by mass or less, more preferably 2% by mass or less, still more preferably 1% by mass or less, and further preferably 0.5% by mass from the viewpoint of maintaining good foaming and detergency in the liquid skin cleanser. The following is more preferable. Here, the oil component is a hydrophobic substance that is phase-separated from water, and includes oils and fats, hydrocarbon oils, ester oils, higher alcohols (10 or more carbon atoms), silicone oils, and the like.

The liquid skin cleanser of the present invention can further contain a cationic surfactant from the viewpoint of improving the smoothness of the skin. The cationic surfactant is preferably 5% by mass or less, more preferably 3% by mass or less, from the viewpoint of improving the smoothness of the skin in the liquid skin cleanser and suppressing the sliminess during rinsing. 1% by mass or less is more preferable, and 0.5% by mass or less is more preferable.

The liquid skin cleanser of this invention is manufactured by mixing a compounding component by a normal method.
For example, it can be produced by a method including the following step 1, step 2, step 3 and step 4.
(Step 1) A step of previously heating the component (F) to 60 to 80 ° C.,
(Step 2) Mix the unneutralized product of component (A) and the neutralizing agent (potassium hydroxide, etc.) into the water heated in step 1 so that the neutralization rate is 95 to 105%. Obtaining a fatty acid salt-containing composition,
(Step 3) The fatty acid salt-containing composition obtained in Step 2, the component (B), the component (C), the component (D) and the component (E), and optionally the component (G) and the component (H) , Component (I) and other components are sequentially added and mixed,
(Step 4) A step of cooling the mixture obtained in Step 3 to 20 to 35 ° C.
However, when other acidic components other than the unneutralized product of component (A) are present as other components to be used, component (D) may react with the acidic components to generate carbon dioxide, so that the above step 2, after mixing the non-neutralized product of component (A) and other acidic components, a neutralizer is added to bring the non-neutralized product of component (A) and other acidic components to a predetermined neutralization rate. It is preferable to neutralize and shift to Step 3 above.
For example, when a part of component (B) is an acidic component, it can be produced by a method including the following step 1 ′, step 2 ′, step 3 ′ and step 4 ′.
(Step 1 ′) a step of heating the component (F) to 60 to 80 ° C. in advance,
(Step 2 ′) In the water heated in Step 1 ′, an unneutralized product of component (A), an unneutralized product of component (B), and other acidic components (such as EDTA) as necessary, A step of obtaining a fatty acid salt-containing composition by mixing with a neutralizing agent (potassium hydroxide or the like) so that the neutralization rate is 95 to 105%;
(Step 3 ′) The fatty acid salt-containing composition obtained in Step 2 ′, the remainder of component (B), component (C), component (D) and component (E), and optionally component (G), A step of sequentially adding and mixing components other than the component (H), the component (I) and other acidic components,
(Step 4) A step of cooling the mixture obtained in step 3 ′ to 20 to 35 ° C.

Various containers such as bottles, tubes, pumps, and pouches can be selected as containers for storing the liquid skin cleanser of the present invention, depending on the viscosity and volume. As the material thereof, plastic, glass, metal, or a composite of these can be used. A pouch container or a bottle container is preferable, and a bottle container is more preferable because it is excellent in ease of taking out the liquid skin cleanser and economy.
A pouch container is, for example, a resin body film in which an outer resin film layer having excellent printability and an anti-content barrier property and an inner resin film layer having excellent sealing properties (such as heat sealing properties) are appropriately laminated. A flat bag-like container made by sealing the left and right edges and the bottom edge of each other (such as heat sealing), or sandwiching another resin film between the resin films, and sealing the periphery It refers to a self-supporting bag-like container (so-called standing pouch) that is made.

The bottle container can be used without any particular restrictions. The material of the bottle container is appropriately selected from, for example, resin containers such as polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol resin, acrylonitrile / styrene resin, ABS resin, polyamide, and glass containers. . The structure of the bottle container is preferably a single layer or a layer structure of two or more layers.

The liquid skin cleanser of the present invention is excellent in smoothness of the skin after washing, and is characterized by being able to complete rinsing quickly because it is familiar with water and hardly dissolves when foaming. When there is much undissolved residue, since it remains on the skin in a state where the concentration of the liquid skin cleanser is high, it becomes difficult to rinse. In order to improve the smoothness of the skin after washing with the liquid skin cleanser, it can be realized by adding a lot of anionic surfactant other than the fatty acid salt in order to reduce the squeaky feeling due to the fatty acid salt. However, a phenomenon occurs in which the viscosity of the liquid skin cleanser is significantly increased by removing the preparation and adding water during foaming. Therefore, the undissolved residue of the preparation is generated, and the rinse residue is likely to be generated at the time of rinsing, resulting in a problem that it takes time for slimming and rinsing. However, in the present invention, by taking the above configuration, while maintaining good foaming and detergency, the softness of the washed skin is improved, and even when water is added, thickening is suppressed, Since the familiarity is good, there is no rinsing residue at the time of rinsing, and there is an excellent effect that the rinsing can be completed quickly without being slippery.

The liquid skin cleanser of the present invention is liquid at 30 ° C., and the viscosity at 30 ° C. is preferably 1000 to 8500 mPa · s, more preferably 1100 to 8000 mPa · s from the viewpoint of improving the ease of taking out from the container. Preferably, 1200 to 6500 mPa · s is more preferable.
In the present invention, the viscosity is measured at 30 ° C. using a B-type viscometer / VISCOMETER TVB-10M (manufactured by TOKI SANGYO CO., LTD).

The liquid skin cleanser of the present invention is suitable as, for example, a face wash, a body soap, a hand soap, etc., and a body soap is more preferable.
The liquid skin cleanser of the present invention can be used by applying to the skin, more specifically, any of the scalp, face, body, limbs, etc., and rinsing with water.

Regarding the above-described embodiment, the present invention further discloses the following composition.

<1> The following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt 5-18% by mass,
(B) Anionic surfactant other than component (A) 2.2-7% by mass,
(C) amphoteric surfactant 0.2-4% by mass,
(D) Carbonate 0.2-7% by mass,
(E) polyol 0.1 to 10% by mass,
(F) A liquid skin cleanser containing water and having a mass ratio (B) / (C) of component (B) to component (C) of 5/3 to 10.

<2> Fatty acid salt of component (A) is preferably general formula (1)

(Wherein R ¹ represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms, and X represents an alkali metal, ammonium, alkanolamine-derived ammonium or basic amino acid)
It is more preferable that it contains at least one selected from the salts of lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid, and at least selected from lauric acid, myristic acid, and palmitic acid. The liquid skin cleansing agent according to <1>, further preferably containing one kind.

The content of <3> component (A) is preferably 6.5% by mass or more, more preferably 8% by mass or more, and more preferably 10% by mass or more in the liquid skin cleanser as a fatty acid equivalent value. The liquid skin cleanser according to <1> or <2>, preferably 16% by mass or less, more preferably 15% by mass or less, and further preferably 12% by mass or less.
<4> The anionic surfactant of component (B) preferably contains at least one selected from alkyl sulfate ester salts, alkyl ether sulfate ester salts, and ether carboxylic acids or salts thereof, and includes at least two types The liquid skin cleanser according to any one of <1> to <3>, more preferably including at least an alkyl sulfate ester salt and / or an alkyl ether sulfate ester salt and an ether carboxylate. .

Among the anionic surfactants of <5> component (B), alkyl sulfate salts are preferably the following general formula (2):
R ² OSO ₃ M ² (2)
(In the formula (2), R ² represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms, and M ² is selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium, and glucammonium. Indicates a cation)
The liquid skin cleanser as described in <4> above, which is more preferably one or more selected from sodium lauryl sulfate, triethanolamine lauryl sulfate and ammonium lauryl sulfate.

Among the anionic surfactants of <6> component (B), alkyl ether sulfates are preferably the following general formula (3):
R ³ O (CH ₂ CH ₂ O) _n SO ₃ M ³ (3)
(In the formula (3), R ³ represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms, and M ³ is selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium, and glucammonium. Represents a cation, n represents the average number of moles added, and is 0.5 to 20)
1 or more selected from polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) ammonium lauryl ether sulfate, and polyoxyethylene (2) sodium lauryl ether sulfate More preferably, the liquid skin cleansing agent according to <4>.

<7> Among the anionic surfactants of the component (B), an ether carboxylic acid or a salt thereof is preferably the following general formula (4):
R ⁴ O (CH ₂ CH ₂ O) _m CH ₂ COOM ⁴ (4)
(In the formula (4), R ⁴ represents an alkyl or alkenyl group having 10 to 22 carbon atoms, m represents an average added mole number, and represents a number of 0.5 to 10, M ⁴ represents a hydrogen atom, an alkali metal Represents alkaline earth metal, ammonium or organic ammonium)
1 or a polyoxyethylene lauryl ether carboxylic acid or a salt thereof, a polyoxyethylene myristyl ether carboxylic acid or a salt thereof, and a polyoxyethylene palmityl ether carboxylic acid or a salt thereof More preferably, it contains two or more, more preferably one or two selected from polyoxyethylene lauryl ether carboxylic acid or a salt thereof, and polyoxyethylene myristyl ether carboxylic acid or a salt thereof, The liquid skin cleansing agent according to <4>, further preferably including ethylene lauryl ether carboxylic acid or a salt thereof.

The content of <8> component (B) is preferably 2.5% by mass or more in the liquid skin cleanser, more preferably 3.2% by mass or more, and still more preferably 3.8% by mass or more. The liquid skin cleanser according to any one of <1> to <7>, preferably 6.6% by mass or less, more preferably 6.2% by mass or less, and further preferably 4.8% by mass or less.
<9> The amphoteric surfactant of component (C) preferably contains at least one selected from a betaine acetate type surfactant, a sulfobetaine type surfactant and an amide betaine type surfactant, and has a sulfobetaine type interface. The liquid according to any one of <1> to <8>, more preferably containing at least one selected from an activator and an amide betaine type surfactant, and more preferably containing at least a sulfobetaine type surfactant. Skin cleanser.

<10> Component (C) preferably contains at least one selected from lauryl dimethylaminoacetic acid betaine, stearyl dimethylaminoacetic acid betaine, lauryl hydroxysulfobetaine and amidopropyl betaine laurate, lauryl hydroxysulfobetaine and lauric acid The liquid skin cleanser according to any one of the above items <1> to <9>, more preferably containing at least one selected from amidopropyl betaines, and more preferably containing at least lauryl hydroxysulfobetaine.
The content of <11> component (C) is preferably 0.4% by mass or more in the liquid skin cleanser, more preferably 1.0% by mass or more, and further preferably 1.4% by mass or more. The liquid skin cleanser according to any one of <1> to <10>, preferably 2.5% by mass or less, more preferably 1.9% by mass or less, and still more preferably 1.6% by mass or less.
<12> The mass ratio (B) / (C) of the component (B) to the component (C) is preferably 1.7 or more, more preferably 2.2 or more, and even more preferably 2.8 or more. The liquid skin cleanser according to any one of <1> to <11>, preferably 6 or less, more preferably 4.3 or less, and even more preferably 3.3 or less.

<13> The carbonate of component (D) is preferably at least one selected from sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate, and at least one of sodium carbonate and potassium carbonate, and carbonic acid The liquid skin cleanser according to any one of the above items <1> to <12>, more preferably containing at least one of sodium hydrogen and potassium hydrogen carbonate, and more preferably containing sodium carbonate and sodium hydrogen carbonate.
The content of <14> component (D) is preferably 0.4% by mass or more in the liquid skin cleanser, more preferably 1% by mass or more, and further preferably 1.8% by mass or more. The liquid skin cleanser according to any one of the above items <1> to <13>, preferably at most mass%, more preferably at most 3.5 mass%, further preferably at most 2.5 mass%.

<15> The polyol of component (E) preferably contains at least one selected from glycerin, diglycerin, sorbitol and maltitol as a trivalent or higher polyol, and is selected from glycerin and diglycerin. The liquid skin cleanser according to any one of the above items <1> to <14>, more preferably including seeds or two kinds, and further preferably including glycerin.
<16> The polyol of component (E) is a divalent polyol selected from ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol and isoprene glycol Or preferably two or more, more preferably one or more selected from propylene glycol, 1,3-propanediol, 1,3-butylene glycol, diethylene glycol and dipropylene glycol. The liquid skin cleanser according to any one of the above <1> to <15>, further preferably containing one or more selected from dipropylene glycol and 1,3-butylene glycol.

<17> The liquid skin cleanser according to any one of <1> to <16>, wherein the component (E) preferably contains a divalent polyol.
The content of <18> component (E) is preferably 0.4% by mass or more in the liquid skin cleanser, more preferably 0.7% by mass or more, and further preferably 0.9% by mass or more. The liquid skin cleanser according to any one of <1> to <17>, preferably 7.5% by mass or less, more preferably 3% by mass or less, and still more preferably 1.8% by mass or less.
<19> The mass ratio (B) / (E) of the component (B) to the component (E) is preferably 0.5 or more, more preferably 0.6 or more, and further preferably 2.5 or more. 10. The liquid skin cleanser according to any one of <1> to <18>, preferably 10 or less, more preferably 6 or less, and still more preferably 5 or less.

The water content of <20> component (F) is preferably 40% by mass or more in the liquid skin cleanser, more preferably 50% by mass or more, further preferably 54% by mass or more, and 90% by mass. The liquid skin cleansing agent according to any one of the above items <1> to <19>, preferably 85% by mass or less, more preferably 80% by mass or less.
<21> The liquid skin cleanser according to any one of <1> to <20>, further comprising (G) a water-soluble polymer.
<22> (G) The water-soluble polymer is preferably an acrylic acid / (meth) acrylic acid alkyl copolymer, cellulose added with a hydroxyethyl group or hydroxypropyl group, a highly polymerized polyalkylene glycol, and a cationic polymer. The liquid skin cleanser according to <21>, which is selected and is more preferably a cationic polymer.
The content of <23> component (G) is preferably 0.01% by mass or more in the liquid skin cleanser, more preferably 0.05% by mass or more, and further preferably 0.1% by mass or more. The liquid skin cleanser according to <21> or <22>, preferably 1.5% by mass or less, more preferably 0.8% by mass or less, and further preferably 0.3% by mass or less.

<24> The liquid skin cleanser according to any one of <1> to <23>, further comprising (H) a nonionic surfactant.
<25> (H) Nonionic surfactant is preferably HLB8 or more, more preferably 9 or more, further preferably 9.5 or more, preferably HLB18 or less, more preferably 16 or less, and 14 or less. The liquid skin cleansing agent according to <24>, wherein is more preferable.
<26> (H) The nonionic surfactant preferably contains one or more selected from polyethylene glycol fatty acid esters, polyoxyethylene alkyl ethers, alkylpolyglucosides and alkylalkanolamides, and alkylalkanols More preferably, an amide is contained, and the following general formula (5):

(Wherein R ⁵ CO represents an acyl group having 8 to 20 carbon atoms, and R ⁶ represents a hydrogen atom, a methyl group or a hydroxyethyl group)
The liquid skin cleanser according to <24> or <25>, wherein the alkyl alkanolamide represented by the formula is more preferable.
The content of <27> component (H) is preferably 0.05% by mass or more in the liquid skin cleanser, more preferably 0.1% by mass or more, and further preferably 0.5% by mass or more. The liquid skin cleanser according to any one of <24> to <26>, preferably 5% by mass or less, more preferably 3% by mass or less, and further preferably 1% by mass or less.

<28> The liquid skin cleanser according to any one of <1> to <27>, further comprising (I) a pearl agent.
<29> (I) The pearling agent is preferably at least one selected from ethylene glycol diolate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate, The liquid skin cleanser according to <28>, wherein at least one selected from a rate, ethylene glycol dilaurate, and ethylene glycol distearate is more preferable.
The content of <30> component (I) is preferably 0.01% by mass or more in the liquid skin cleanser, more preferably 0.1% by mass or more, and further preferably 0.4% by mass or more. The liquid skin cleanser according to <28> or <29>, preferably 4% by mass or less, more preferably 3% by mass or less, and further preferably 2% by mass or less.

The content of the <31> oily component is preferably 3% by mass or less in the liquid skin cleanser, more preferably 2% by mass or less, still more preferably 1% by mass or less, and 0.5% by mass or less. The liquid skin cleanser according to any one of <1> to <30>, more preferably.
<32> The content of the cationic surfactant is preferably 5% by mass or less, more preferably 3% by mass or less, still more preferably 1% by mass or less in the liquid skin cleanser, and 0.5% by mass. % Of the liquid skin cleanser according to any one of the above items <1> to <31>.

<33> The liquid skin cleanser according to any one of <1> to <32>, preferably filled in a pouch container or a bottle container, and more preferably a bottle container.
<34> The viscosity at 30 ° C. is preferably 1000 to 8500 mPa · s, more preferably 1100 to 80000 mPa · s, and further preferably 1200 to 65000 mPa · s, and any one of the above <1> to <33> The liquid skin cleanser as described.

<35> The liquid skin cleanser according to any one of <1> to <34>, preferably a face wash, a body soap, and a hand soap, and more preferably a body soap.
<36> The liquid skin cleanser according to any one of the above <1> to <35>, which is used by applying to the skin, more preferably any of the scalp, face, body, limbs, and the like, and rinsing with water. .

<37> The following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt containing at least one selected from the salts of lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, 5 to 18% by mass,
(B) an anionic surfactant containing at least one selected from alkyl sulfate ester salts, alkyl ether sulfate ester salts, and ether carboxylic acids or salts thereof, 2.2 to 7% by mass,
(C) amphoteric surfactants containing at least one selected from sulfobetaine surfactants and amide betaine surfactants, 0.2 to 4% by mass,
(D) 0.2 to 7% by mass of a carbonate containing at least one selected from sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate,
(E) polyol 0.1 to 10% by mass,
(F) A liquid skin cleanser containing water and having a mass ratio (B) / (C) of component (B) to component (C) of 5/3 to 10.

<38> The following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt containing at least one selected from the salts of lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, 5 to 18% by mass,
(B) an anionic surfactant containing at least one selected from alkyl sulfate ester salts, alkyl ether sulfate ester salts, and ether carboxylic acids or salts thereof, 2.2 to 7% by mass,
(C) amphoteric surfactants containing at least one selected from sulfobetaine surfactants and amide betaine surfactants, 0.2 to 4% by mass,
(D) 0.2 to 7% by mass of a carbonate containing at least one selected from sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate,
(E) polyol 0.1 to 10% by mass,
(F) containing water, the mass ratio [(B) / (C)] of component (B) to component (C) is 1.7 to 4.2, and component (B) relative to component (E) A liquid skin cleanser having a content ratio [(B) / (E)] of 0.5 to 10.

<39> Next components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt containing at least one selected from the salts of lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, 5 to 18% by mass,
(B) an anionic surfactant containing at least one selected from alkyl sulfate ester salts, alkyl ether sulfate ester salts, and ether carboxylic acids or salts thereof, 2.2 to 7% by mass,
(C) amphoteric surfactants containing at least one selected from sulfobetaine surfactants and amide betaine surfactants, 0.2 to 4% by mass,
(D) 0.2 to 7% by mass of a carbonate containing at least one selected from sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate,
(E) polyol 0.1 to 10% by mass,
(F) containing water, the mass ratio [(B) / (C)] of component (B) to component (C) is 1.7 to 4.2, and component (B) relative to component (E) The content ratio [(B) / (E)] is 0.5 to 10, the component (E) contains a divalent polyol, and the liquid contains 5% by mass or more of a divalent polyhydric alcohol in the polyol. Skin cleanser.

<40> The method for using a liquid skin cleanser according to any one of the above <1> to <39>, which is applied to the skin and washed off with water.

<41> The method for producing a liquid skin cleanser according to any one of <1> to <39>, comprising the following step 1, step 2, step 3 and step 4.
(Step 1) A step of previously heating the component (F) to 60 to 80 ° C.,
(Step 2) A fatty acid salt-containing composition obtained by mixing the unneutralized product of component (A) and a neutralizing agent with water heated in Step 1 so that the neutralization rate is 95 to 105%. Obtaining a step,
(Step 3) The fatty acid salt-containing composition obtained in Step 2, the component (B), the component (C), the component (D), the component (E), and other components as necessary are sequentially added and mixed. The process of
(Step 4) A step of cooling the mixture obtained in Step 3 to 20 to 35 ° C.

<42> Any one of the above <1> to <39>, wherein a part of the component (B) is an acidic component and includes the following step 1 ′, step 2 ′, step 3 ′ and step 4 ′ Manufacturing method for liquid skin cleanser.
(Step 1 ′) a step of heating the component (F) to 60 to 80 ° C. in advance,
(Step 2 ′) In the water heated in Step 1 ′, an unneutralized product of component (A), an unneutralized product of component (B), if necessary, other acidic components, and a neutralizing agent. , A step of mixing to obtain a neutralization rate of 95 to 105% to obtain a fatty acid salt-containing composition,
(Step 3 ′) The fatty acid salt-containing composition obtained in Step 2 ′, the remainder of component (B), component (C), component (D), component (E), and other acidic components as necessary Sequentially adding and mixing the components of
(Step 4) A step of cooling the mixture obtained in step 3 ′ to 20 to 35 ° C.

Examples 1 to 39, Comparative Examples 1 to 13
Manufactures liquid skin cleansing agents with the compositions shown in Tables 2 to 5 and measures the viscosity and viscosity upon addition of water, as well as good compatibility with water, foaming, detergency, non-smoothness in rinsing and smooth skin. Was evaluated. The results are also shown in Tables 2 to 5.

(Production method)
(Step 1) The component (F) is heated to 80 ° C. in advance.
(Step 2) In the water heated in Step 1, an unneutralized product of component (A), an unneutralized product of component (B) (polyoxyethylene lauryl ether acetic acid), EDTA, and potassium hydroxide are added. Mixing so that the neutralization rate is 95 to 105% to obtain a fatty acid salt-containing composition.
(Step 3) Fatty acid salt-containing composition obtained in Step 2 and the remainder of component (B) (sodium polyoxyethylene lauryl sulfate), component (C), component (D), component (E), component (G ), Component (H) and component (I) are sequentially added and mixed.
(Step 4) The mixture obtained in Step 3 is cooled to 35 ° C.
(Step 5) Phenoxyethanol and a fragrance were sequentially added to the mixture obtained in Step 4 and mixed to obtain a liquid skin cleanser.

(Evaluation methods)
(1) Viscosity measurement:
Each liquid skin cleanser is filled in a container (screw tube (with cap and packing) transparent NO.7 50 mL 35 x 78 x 20 mm (manufactured by Maruemu)) so that no air bubbles enter, and a water bath set at 30 ° C. The mixture was allowed to stand for about 1 hour to adjust the temperature, and then the viscosity was measured for 1 minute. A viscometer / VISCOMETER TVB-10M (manufactured by TOKI SANGYO CO., LTD) was used as a viscosity measuring machine.
First, measurement is performed under the condition (i). If the measured value is within the accuracy range and a stable measured value is obtained, the measured value is adopted. However, if the measurement value is out of the accuracy range or if a stable measurement value cannot be obtained due to the upper and lower limits of the accuracy range, the measurement is performed under the condition (ii). This operation is repeated to obtain a stable measurement value. Note that the measurement time of the composition at each rotation number was 1 minute.
(i) No. M4: 6 rpm
(ii) No. M4: 12 rpm
(iii) No. M4: 30 rpm
(iv) No. M3: 30 rpm
(v) No. M2: 30 rpm
(iv) No. M1: 30 rpm

(2) Viscosity measurement during water addition:
Each liquid skin cleanser was accurately weighed in a 100 mL beaker, 2 g of ion-exchanged water was added, and the sample was prepared by stirring for 30 minutes so that bubbles did not enter.
Thereafter, the viscosity was measured in the same manner as in (1).
Further, the ratio of the viscosity during addition to the viscosity measured in (1) (viscosity / viscosity during addition) was determined. If this value is 1.0 or less, it indicates that no thickening occurs when water is added.

(3) Good familiarity with water:
3 expert panelists took out 0.5g of each liquid skin cleanser in their palms, added 5g of water and rubbed their hands 10 times, and if they were very familiar with water 5. The case where the familiarity with water was very bad was set to 1, and the evaluation was made in five stages. The result was obtained by calculating an average value of three panelists and rounding off to the first decimal place.

(4) Foaming:
3 expert panelists took out 0.5 g of each liquid skin cleanser into their palms, added 5 g of water and rubbed their hands 10 times, the foaming was 5 when foaming was good, and 1 when foaming was bad, Evaluation was made in 5 stages. The result was obtained by calculating an average value of three panelists and rounding off to the first decimal place.

(5) Detergency:
Three expert panelists applied carbon black-colored model comedo sebum (Table 1) to a 3.5 cmφ circular shape on the forearm, 20 μL, dried for 30 minutes, and then 2.5% by mass of each liquid skin cleanser Lightly massage 1 g of the aqueous solution with your index finger in a circular motion 10 times, and rinse thoroughly with tap water. The state after washing was evaluated in five stages, with 5 being no dirt and 1 being no dirt. The result was obtained by calculating an average value of three panelists and rounding off to the first decimal place.

(6) No sliminess when rinsing:
Three expert panelists use 0.5 g of each liquid skin cleanser to clean one arm's forearm, with a non-smooth state of 5 at the time of rinsing, a very slim state of 1, Evaluation was made in 5 stages. The result was obtained by calculating an average value of three panelists and rounding off to the first decimal place.

(7) Skin smoothness:
Three specialized panelists used 0.5 g of each liquid skin cleanser to wash one arm's forearm, and evaluated the smoothness of the skin 1 minute after towel drying. The skin was very smooth and 5 and the skin was very squeezed as 1 and evaluated in 5 grades. The result was obtained by calculating an average value of three panelists and rounding off to the first decimal place.

All of the liquid skin cleansing agents of the present invention are suppressed in thickening upon addition of water, and have excellent effects in any of the items of familiarity with water, foaming, detergency, smoothness of skin, and slickness during rinsing. It was a thing.
However, as is apparent from Comparative Examples 1 to 4, the addition of a large amount of anionic surfactant other than the fatty acid salt of component (B) improves the smoothness of the skin, but increases the viscosity due to water addition. It can be seen that the familiarity with water is significantly reduced. On the other hand, in Examples 7 to 11 containing the polyol of component (E), thickening due to water can be suppressed even if a large amount of component (B) is contained, and both the familiarity with water and the smoothness of the skin are good. It turns out that it is.
Further, in Comparative Examples 5 to 13 in which a part of the configuration of the present invention is lacking, the familiarity with water, foaming, cleaning power, smoothness of the skin, and rinsing when compared with the liquid skin cleanser of the present invention It was remarkably inferior in any of the items.

Examples 40 and 41
In the same manner as in Examples 1 to 39, bottle skin liquid skin cleansing compositions having the compositions shown in Tables 6 and 7 were produced.
All of the obtained liquid skin cleansers have reduced thickening during water addition, excellent compatibility with water, good foaming, excellent detergency, and reduced luster when rinsed. Was finished smoothly.

Claims (13)

The following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt 5-18% by mass,
(B) Anionic surfactant other than component (A) 2.2-7% by mass,
(C) amphoteric surfactant 0.2-4% by mass,
(D) Carbonate 0.2-7% by mass,
(E) polyol 0.1 to 10% by mass,
(F) A liquid skin cleanser containing water and having a mass ratio (B) / (C) of component (B) to component (C) of 5/3 to 10. The liquid skin cleanser according to claim 1, wherein the mass ratio (B) / (E) of component (B) to component (E) is 0.5 to 10. The liquid skin cleanser according to claim 1 or 2, wherein the mass ratio (B) / (C) of component (B) to component (C) is 1.7 to 6. The liquid skin cleanser according to any one of claims 1 to 3, wherein the component (B) is at least one selected from alkyl sulfate esters, alkyl ether sulfates and alkyl ether carboxylates. The liquid skin cleanser according to any one of claims 1 to 4, wherein component (C) is at least one selected from sulfobetaine surfactants and amide betaine surfactants. The liquid skin cleanser according to any one of claims 1 to 5, wherein the component (E) contains a dihydric polyol. (F) The liquid skin cleanser according to any one of claims 1 to 6, wherein the water content is 40 to 90% by mass. The liquid skin cleanser according to any one of claims 1 to 7, further comprising (G) 0.01 to 1.5% by mass of a water-soluble polymer. 9. The component (G) is one or more selected from acrylic acid / (meth) acrylic acid alkyl copolymers, cellulose to which a hydroxyethyl group or a hydroxypropyl group is added, a highly polymerized polyethylene glycol, and a cationic polymer. The liquid skin cleanser as described. The liquid skin cleanser according to claim 8 or 9, wherein the component (G) is a cationic polymer. The method for using a liquid skin cleanser according to any one of claims 1 to 10, wherein the method is applied to the skin and rinsed with water. The method for producing a liquid skin cleanser according to any one of claims 1 to 10, comprising the following step 1, step 2, step 3 and step 4.
(Step 1) A step of previously heating the component (F) to 60 to 80 ° C.,
(Step 2) A fatty acid salt-containing composition obtained by mixing the unneutralized product of component (A) and a neutralizing agent with water heated in Step 1 so that the neutralization rate is 95 to 105%. Obtaining a step,
(Step 3) The fatty acid salt-containing composition obtained in Step 2, the component (B), the component (C), the component (D), the component (E), and other components as necessary are sequentially added and mixed. The process of
(Step 4) A step of cooling the mixture obtained in Step 3 to 20 to 35 ° C. The liquid skin cleanser according to any one of claims 1 to 10, wherein a part of the component (B) is an acidic component and comprises the following step 1 ', step 2', step 3 'and step 4'. Manufacturing method.
(Step 1 ′) a step of heating the component (F) to 60 to 80 ° C. in advance,
(Step 2 ′) In the water heated in Step 1 ′, an unneutralized product of component (A), an unneutralized product of component (B), if necessary, other acidic components, and a neutralizing agent. , A step of mixing to obtain a neutralization rate of 95 to 105% to obtain a fatty acid salt-containing composition,
(Step 3 ′) The fatty acid salt-containing composition obtained in Step 2 ′, the remainder of component (B), component (C), component (D), component (E), and other acidic components as necessary Sequentially adding and mixing the components of
(Step 4) A step of cooling the mixture obtained in step 3 ′ to 20 to 35 ° C.