JP2017008031A - Liquid skin cleanser - Google Patents

Abstract

An object of the present invention is to provide a liquid skin cleanser that is easy to take out an appropriate amount from a container, that does not melt easily, has excellent cleaning power, and provides a refreshing feeling. The following components (A), (B), (C), (D), (E) and (F): (A) fatty acid salt 9 to 27% by mass, (B) other than component (A) Anionic surfactant of 0.3 to 3.5% by mass, (C) amphoteric surfactant of 0.3 to 3.5% by mass, (D) water-soluble polymer of 0.1 to 1.5% by mass, ( E) Carbonate 1.5-6 mass%, (F) Liquid skin cleansing agent containing water. [Selection figure] None

Description

  The present invention relates to a liquid skin cleanser.

Conventionally, skin cleansing agents are required to have foaming, detergency, a refreshing feeling after washing, etc., and solid soaps mainly composed of higher fatty acid alkali metal salts have been used (for example, Patent Document 1, Patent Document). 2).
However, the bar soap is not easily melted and foamed easily. In addition, it may become dirty during use or performance may deteriorate, and it may not be used up to the end.
On the other hand, liquid skin cleansers are known as means for solving such problems (for example, Patent Document 3). The liquid skin cleanser can easily clean the skin as compared with the soap bar.

JP 2001-64691 A Special table 2014-526436 gazette Special table 2009-529588 gazette

However, the conventional liquid skin cleanser has a problem that it comes out of the container or is excessively used. In addition, soaps with higher cleaning properties have been demanded from recent market demand characteristics.
The present invention relates to a liquid skin cleanser that is easy to take out an appropriate amount from a container, does not melt easily, has excellent cleaning power, and provides a refreshing feeling.

  The present inventors use the fatty acid salt, other anionic surfactants and amphoteric surfactants as cleaning components, and further use the water-soluble polymer and carbonate in combination at a specific ratio to achieve the above problem. It has been found that a liquid skin cleanser that solves the above can be obtained.

The present invention includes the following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt 9-27 mass%,
(B) 0.3 to 3.5% by mass of an anionic surfactant other than component (A),
(C) Amphoteric surfactant 0.3-3.5% by mass,
(D) Water-soluble polymer 0.1 to 1.5% by mass,
(E) Carbonate 1.5-6% by mass,
(F) It relates to a liquid skin cleanser containing water.

Moreover, this invention relates to the manufacturing method of the said liquid skin cleansing agent including the following processes.
(Step 1) Mix the unneutralized product of component (A) with a neutralizer, component (D), or part or all of component (F) so that the neutralization rate is 95 to 100%. Obtaining a fatty acid salt-containing composition,
(Step 2) A step of mixing the fatty acid salt-containing composition obtained in Step 1 with the components (B), (C) and (E).

  The liquid skin cleanser of the present invention is easy to take out an appropriate amount from the container, and when taking out the agent, the agent does not squeeze the thread, and it melts quickly, is easy to stretch, has good foaming, and has a cleaning power. In addition, it is not sticky. Moreover, the take-out property at a low temperature is also good. It is suitable for filling a pouch container and a bottle container.

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

(Wherein R ¹ represents a linear or branched alkyl group 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 of lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, behenic acid, etc., among these, lauric acid, myristic acid, palmitic acid are mentioned. At least one selected from acid, stearic acid and oleic acid salts is preferred. Examples of these salts include alkali metals such as potassium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine and triethanolamine; and basic amino acids such as arginine and lysine.

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, one selected from potassium hydroxide and sodium hydroxide is preferable from the viewpoint of improving skin cleanability and reducing the colorability and odor of the liquid skin cleanser.

  The fatty acid salt of the component (A) can be used singly or in combination of two or more, and from the viewpoint of improving the ease of taking out the liquid skin cleanser from the container and improving the dissolution property, In the total composition, it is 9% by mass or more, preferably 9.5% by mass or more, more preferably 11% by mass or more, further preferably 14% by mass or more, 27% by mass or less, and 25% by mass or less. Preferably, 22 mass% or less is more preferable, and 18 mass% or less is further more preferable. Moreover, content of a component (A) is 9-27 mass% in the whole composition as a fatty acid, 9.5-25 mass% is preferable from the same viewpoint, 11-22 mass% is more preferable, 14-18 mass% is still more preferable.

  The anionic surfactant of the component (B) may be anything other than the component (A), as long as it is used for a normal skin cleanser, for example, alkyl (ether) sulfate, allyl (ether) sulfate, Alkyl ether carboxylates, alkyl benzene sulfonates, alkane sulfonates, olefin sulfonates, alkyl ether sulfonates, glycerin ether sulfonates, alpha methyl ester sulfonates, sulfo fatty acid salts, alkyl sulfates, fatty alcohols Ether sulfate, glycerine ether sulfate, hydroxy mixed ether sulfate, monoglyceride (ether) sulfate, fatty acid amide (ether) sulfate, monoalkylsulfosuccinate, dialkylsulfosuccinate, monoalkylsulfosuccinamide, Dialkyl sulfosucci Amidoates, sulfotriglycerides, amide ether carboxylates and salts thereof, fatty acid isethionate, fatty acid sarcosinate, fatty acid tauride; N-acyl amino acid salts such as acyl lactylate, acyl tartrate, acyl glutamate, acyl aspartate; alkyl Examples include oligoglucoside sulfates, protein fatty acid condensates (wheat-based plant products), alkyl (ether) phosphates, and the like.

Among these, at least one selected from alkyl (ether) sulfates and alkyl ether carboxylates is preferable from the viewpoint of improving low-temperature stability, detergency, and meltability, and more preferably including both. The liquid skin cleanser of the present invention containing at least one selected from these components (B), particularly alkyl (ether) sulfates and alkyl ether carboxylates, is excellent in low temperature stability. The liquid skin cleansing agent can be easily taken out from the container.
In the present invention, the ability to take out the liquid skin cleanser from the container means that an appropriate amount of the liquid skin cleanser can be easily taken out from the container, and that the agent does not cause stringing when the agent is taken out. means.
In general, surfactants contribute to detergency, but in compositions containing them, the surfactants form string micelles, so that the agent tends to twist the yarn when the agent is taken out. However, in the present invention, even if it contains a surfactant, it is excellent in detergency by combining with a specific component, and it is easy to take out an appropriate amount of liquid skin cleanser from the container. In this case, there is a specific effect that the agent does not twist the yarn.

  Component (B) can be used singly or in combination of two or more, and from the viewpoint of improving low-temperature stability, detergency, and meltability, the content is 0.3% by mass in the total composition 0.4 mass% or more is preferable, 0.5 mass% or more is more preferable, 0.7 mass% or more is more preferable, 3.5 mass% or less is preferable, and 3.3 mass% or less is preferable. 3.2 mass% or less is more preferable, and 2.5 mass% or less is further more preferable. Moreover, content of a component (B) is 0.3-3.5 mass% in the whole composition, 0.4-3.3 mass% is preferable, and 0.5-3.2 mass% is more. Preferably, 0.7 to 2.5% by mass is more preferable.

The amphoteric surfactant of component (C) may be any as long as it is used in ordinary skin cleansing agents, such as betaine acetate surfactants such as lauryldimethylaminoacetic acid betaine, lauryldimethylamine oxide and the like. Amine oxide type surfactants, imidazolinium betaine type surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, amide betaine type surfactants such as amidopropyl betaine laurate, lauryl Examples include sulfobetaine type surfactants such as hydroxysulfobetaine.
Of these, at least one selected from sulfobetaine-type surfactants and amide betaine-type surfactants is preferable from the viewpoint of low-temperature stability, detergency, non-stickiness, and ease of melting, and sulfobetaine-type surfactants are preferred. Among the surfactants, lauryl hydroxysulfobetaine is preferable, and among the amide betaine type surfactants, amide propylbetaine laurate is preferable.

  Component (C) can be used singly or in combination of two or more, from the viewpoint of improving the low-temperature stability, detergency, non-stickiness, and ease of melting of the liquid skin cleanser Is 0.3% by mass or more in the total composition, preferably 0.4% by mass or more, more preferably 0.5% by mass or more, still more preferably 0.7% by mass or more, and 0.9% by mass or more. Is more preferably 3.5% by mass or less, preferably 3.3% by mass or less, more preferably 3.1% by mass or less, still more preferably 2.9% by mass or less, and 2.7% by mass or less. Even more preferred. Moreover, content of a component (C) is 0.3-3.5 mass% in the whole composition, 0.4-3.3 mass% is preferable, and 0.5-3.1 mass% is more. Preferably, 0.7 to 2.9% by mass is more preferable, and 0.9 to 2.7% by mass is even more preferable.

  In the present invention, the mass ratio (A) / (C) of the component (A) to the component (C) is 2 from the viewpoint of improving the skin cleansing property and reducing the colorability and odor of the liquid skin cleanser. The above is preferable, 4 or more is more preferable, 6 or more is more preferable, 35 or less is preferable, 20 or less is more preferable, and 12 or less is more preferable. Moreover, 2-35 are preferable, as for mass ratio (A) / (C) of the component (A) with respect to a component (C), 4-20 are more preferable, and 6-12 are more preferable.

The water-soluble polymer of component (D) may be any as long as it is used for a normal skin cleanser.
Examples of water-soluble polymers include acrylic / alkyl (meth) acrylate copolymers such as acrylic acid / alkyl acrylate crosspolymers, cellulose with hydroxyethyl groups or hydroxypropyl groups added, and liquid skin washing. From the viewpoint of improving moderate take-out property and low-temperature stability of the agent, it is mentioned as a suitable water-soluble polymer.
Examples of acrylic acid / (meth) acrylic acid alkyl copolymers include Pemlen TR-1, Pemlen TR-2, Carbopol ETD2020, Carbopol 1382, Carbopol 1342 (manufactured by Lubrizol Advanced Materials), AQUPEC HV. Commercially available products such as -501ER (manufactured by Sumitomo Seika Co., Ltd.) can be used.

In addition, a 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 has a substituent other than these. May be.
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 a 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. 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 (and above, manufactured by ASLAND) Goods can be used.

  Component (D) can be used singly or in combination of two or more, and from the viewpoint of improving the appropriate removal properties and low-temperature stability of the liquid skin cleanser, the content is 0. 1 mass% or more, preferably 0.2 mass% or more, more preferably 0.25 mass% or more, further preferably 0.27 mass% or more, 1.5 mass% or less, and 1.3 mass% The following is preferable, 1 mass% or less is more preferable, and 0.8 mass% or less is more preferable. Moreover, content of a component (D) is 0.1-1.5 mass% in the whole composition from the same viewpoint, 0.2-1.3 mass% is preferable, 0.25-1 mass % Is more preferable, and 0.27 to 0.8 mass% is more preferable.

Examples of the carbonate of the component (E) 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.
Among these, at least one selected from sodium carbonate, potassium carbonate, sodium hydrogen carbonate and potassium hydrogen carbonate from the viewpoint that the properties of the agent are water-soluble, and from the viewpoint of improving the ease of taking out the agent and detergency. preferable.

  Component (E) can be used singly or in combination of two or more, and from the viewpoint of detergency and ease of taking out the liquid skin cleanser, the content is 1.5 mass in the total composition. % Or more, preferably 1.6% by mass or more, more preferably 1.8% by mass or more, further preferably 2.5% by mass or more, 6% by mass or less, and preferably 5.5% by mass or less, 5 mass% or less is more preferable, and 4.5 mass% or less is further more preferable. Moreover, content of a component (E) is 1.5-6 mass% in the whole composition, 1.6-5.5 mass% is preferable, 1.8-5 mass% is more preferable, 2. 5-4.5 mass% is further more preferable.

  In the present invention, the total content of components (D) and (E) is 1.5 mass in the total composition from the viewpoint of improving the skin cleansing property and reducing the colorability and odor of the liquid skin cleanser. % Or more, preferably 2% by weight or more, more preferably 3% by weight or more, preferably 7% by weight or less, more preferably 6% by weight or less, and further preferably 5% by weight or less. In addition, the total content of components (D) and (E) is preferably 1.5 to 7% by mass, more preferably 2 to 6% by mass, and further preferably 3 to 5% by mass in the total composition.

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 preferably 90% by mass or less in the total composition. 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 entire composition.
In the present invention, since the component (E) is contained in the composition, when an acid is present in the composition, the carbonate of the component (E) reacts with the acid to generate carbon dioxide, Viscosity is not realized, and it is difficult to achieve both moderate ease of taking out and melting and collapsing properties. For this reason, when not only a component (A) but a component (D) is an acid, it is preferable that it is neutralized.
The neutralization ratio with respect to the sum total of the component (A) and the component (D) is preferably 0.95 to 1.05, and preferably 0.98 to 1.02 from the viewpoint of improving the compatibility between moderate take-out ease and meltability. Is more preferable.

The liquid skin cleanser of the present invention further comprises components used in ordinary cleansing agents, for example, surfactants other than components (A), (B) and (C), moisturizers, oily components, antiseptics, It can contain inflammatory agents, preservatives, chelating agents, thickeners, salts, pearlizing agents, scrub agents, fragrances, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts and the like.
The liquid skin cleanser of the present invention preferably further contains an ester compound from the viewpoint of improving ease of removal from the container and meltability, and among the ester compounds, glycol difatty acid esters are preferred, ethylene At least one selected from glycol diolate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate is more preferable, and selected from ethylene glycol diolate, ethylene glycol dilaurate and ethylene glycol distearate. At least one is more preferable.
From the same viewpoint, the content of the ester compound is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, further preferably 0.4% by mass or more, and 4% by mass or less. Is preferable, 3 mass% or less is more preferable, and 2 mass% or less is further more preferable. Moreover, 0.01-4 mass% is preferable in the whole composition, as for content of an ester compound, 0.1-3 mass% is more preferable, and 0.4-2 mass% is further 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 and step 2.
(Step 1) Mix the unneutralized product of component (A) with a neutralizer, component (D), or part or all of component (F) so that the neutralization rate is 95 to 100%. Obtaining a fatty acid salt-containing composition,
(Step 2) A step of mixing the fatty acid salt-containing composition obtained in Step 1 with the components (B), (C) and (E).
Thus, by neutralizing the component (A) and the component (D) in advance and mixing with the component (E), generation of carbon dioxide gas is minimized, moderate take-out ease and meltability A liquid skin cleanser having the following can be obtained.

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 preferred because it is easy to remove the liquid skin cleanser and is excellent in 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.
From the viewpoint of moderate ease of taking out the skin cleanser, a pouch container with a spout is preferable.

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

  The liquid skin cleansing agent of the present invention is characterized in that it is easy to take out moderately and that the agent does not comb the yarn when the agent is taken out. In order to improve the ease of taking out the liquid skin cleansing agent, it can be realized by lowering the viscosity. However, there arises a problem that the liquid skin cleanser easily comes out of the container. Increasing the viscosity to suppress it makes it difficult to remove the liquid skin cleanser, makes it easier to comb the thread when removing the agent, and makes the agent less familiar when picked up by the hand. The problem is that it is difficult to stretch. However, in the present invention, the liquid skin cleanser can be taken out moderately by taking the above-described configuration, while suppressing the liquid from flowing out of the container, suppressing the agent from twisting the yarn, and melting and collapsing. Because of its excellent properties, it has an excellent effect of easily extending the agent. In the present invention, moderately easy to take out means that the agent can be easily taken out from the container, while the liquid skin cleanser does not spill out of the container at once. The liquid skin cleansing agent of the present invention can achieve such a performance by adjusting the viscosity to an appropriate level according to the container used.

The liquid skin cleanser of the present invention is liquid at 30 ° C., and the viscosity at 30 ° C. is preferably 1000 to 100000 mPa · s, and 1500 to 90000 mPa · s from the viewpoint of improving ease of moderate removal. Is more preferable, 1800 to 80000 mPa · s is more preferable, and 2000 to 70000 mPa · s is further more preferable.
When the liquid skin cleansing agent of the present invention is filled in a pouch container, the viscosity at 30 ° C. is preferably 5000 to 100000 mPa · s, more preferably 7000 to 70000 mPa · s, and further 9000 to 40000 mPa · s. 10000 to 20000 mPa · s is more preferable.
Moreover, when filling a bottle container and using it, it is preferable that the viscosity in 30 degreeC is 1000-6000 mPa * s, 1500-5500 mPa * s is more preferable, 2000-6000 mPa * s is further 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.

  This invention discloses the following compositions further regarding embodiment mentioned above.

<1> The following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt 9-27 mass%,
(B) 0.3 to 3.5% by mass of an anionic surfactant other than component (A),
(C) Amphoteric surfactant 0.3-3.5% by mass,
(D) Water-soluble polymer 0.1 to 1.5% by mass,
(E) Carbonate 1.5-6% by mass,
(F) Liquid skin cleanser containing water.

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

(Wherein R ¹ represents a linear or branched alkyl group or alkenyl group having 9 to 21 carbon atoms, and X represents an alkali metal, ammonium, alkanolamine-derived ammonium or basic amino acid)
More preferably, at least one selected from lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, and behenic acid salt, lauric acid, myristic acid, The liquid skin cleanser according to <1>, wherein at least one selected from palmitic acid, stearic acid, and oleic acid salt is more preferable.

The content of the <3> component (A) is preferably 9.5% by mass or more, more preferably 11% by mass or more, even more preferably 14% by mass or more, and 25% by mass as the fatty acid in the total composition. % Or less, more preferably 22% by mass or less, and further preferably 18% by mass or less, the liquid skin cleansing agent according to <1> or <2>.
<4> The anionic surfactant of component (B) is preferably at least one selected from alkyl (ether) sulfates and alkyl ether carboxylates, and more preferably includes both. <1> The liquid skin cleanser of any one of-<3>.
The content of <5> component (B) is preferably 0.4% by mass or more, more preferably 0.5% by mass or more, further preferably 0.7% by mass or more, in the total composition. The liquid skin cleanser according to any one of <1> to <4>, preferably 3% by mass or less, more preferably 3.2% by mass or less, and further preferably 2.5% by mass or less.

<6> The amphoteric surfactant of component (C) is preferably at least one selected from sulfobetaine surfactants and amide betaine surfactants, including lauryl hydroxysulfobetaine and lauric acid amidopropyl betaine The liquid skin cleanser according to any one of <1> to <5>, more preferably.
The content of <7> component (C) is preferably 0.4% by mass or more, more preferably 0.5% by mass or more, further preferably 0.7% by mass or more in the total composition, 0% 9.9% by mass or more is more preferable, 3.3% by mass or less is preferable, 3.1% by mass or less is more preferable, 2.9% by mass or less is further preferable, and 2.7% by mass or less is more preferable. The liquid skin cleanser according to any one of <1> to <6>.
<8> The mass ratio (A) / (C) of the component (A) to the component (C) is preferably 2 or more, more preferably 4 or more, further preferably 6 or more, and preferably 35 or less, The liquid skin cleanser according to any one of <1> to <7>, more preferably 20 or less, and still more preferably 12 or less.

<9> The water-soluble polymer of component (D) is preferably at least one selected from a copolymer of acrylic acid / alkyl (meth) acrylate, a cellulose having a hydroxyethyl group and a hydroxypropyl group added thereto. The liquid skin cleanser according to any one of <1> to <8>.
The content of the <10> component (D) is preferably 0.2% by mass or more, more preferably 0.25% by mass or more, further preferably 0.27% by mass or more, in the total composition. The liquid skin cleanser according to any one of <1> to <9>, preferably 3% by mass or less, more preferably 1% by mass or less, and still more preferably 0.8% by mass or less.
<11> The carbonate of component (E) is preferably at least one selected from sodium carbonate, potassium carbonate, sodium bicarbonate and potassium bicarbonate, according to any one of the above <1> to <10> Liquid skin cleanser.
The content of <12> component (E) is preferably 1.6% by mass or more, more preferably 1.8% by mass or more, further preferably 2.5% by mass or more, in the total composition. The liquid skin cleanser according to any one of <1> to <11>, preferably 5% by mass or less, more preferably 5% by mass or less, and still more preferably 4.5% by mass or less.

<13> The total content of components (D) and (E) is preferably 1.5% by mass or more in the total composition, more preferably 2% by mass or more, and further preferably 3% by mass or more, The liquid skin cleanser according to any one of <1> to <12>, preferably 7% by mass or less, more preferably 6% by mass or less, and further preferably 5% by mass or less.
<14> The water content of the component (F) is preferably 40% by mass or more, more preferably 50% by mass or more, further preferably 54% by mass or more, and more preferably 90% by mass or less in the total composition. Preferably, 85 mass% or less is more preferable, and 80 mass% or less is further more preferable, The liquid skin cleansing agent any one of said <1>-<13>.
<15> The neutralization ratio with respect to the sum of the component (A) and the component (D) is preferably 0.95 to 1.05, and more preferably 0.98 to 1.02. 14> The liquid skin cleanser of any one of 14>.

<16> Further, it preferably contains an ester compound, more preferably contains a glycol difatty acid ester, ethylene glycol dioleate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate. The liquid skin cleanser according to any one of <1> to <15>, wherein at least one selected from the group consisting of ethylene glycol diolate, ethylene glycol dilaurate, and ethylene glycol distearate is more preferable. Agent.
The content of the <17> ester compound is preferably 0.01% by mass or more in the total composition, more preferably 0.1% by mass or more, still more preferably 0.4% by mass or more, and 4% by mass. The liquid skin cleanser as described in <16> above, preferably 3% by mass or less, more preferably 2% by mass or less.

<18> The viscosity at 30 ° C. is preferably 1000 to 100,000 mPa · s, more preferably 1500 to 90000 mPa · s, further preferably 1800 to 80000 mPa · s, and further preferably 2000 to 70000 mPa · s. The liquid skin cleanser according to any one of 1> to <17>.
<19> Used in a pouch container, and the viscosity at 30 ° C. is preferably 5000 to 100,000 mPa · s, more preferably 7000 to 70000 mPa · s, still more preferably 9000 to 40000 mPa · s, and more preferably 10,000 to The liquid skin cleanser according to any one of <1> to <18>, wherein 20000 mPa · s is more preferable.
<20> Used in a bottle container, and the viscosity at 30 ° C. is preferably 1000 to 6000 mPa · s, more preferably 1500 to 5500 mPa · s, and further preferably 2000 to 6000 mPa · s. The liquid skin cleanser according to any one of> to <18>.

<21> The method for producing a liquid skin cleanser according to any one of <1> to <20>, including the following step 1 and step 2.
(Step 1) Mix the unneutralized product of component (A) with a neutralizer, component (D), or part or all of component (F) so that the neutralization rate is 95 to 100%. Obtaining a fatty acid salt-containing composition,
(Step 2) A step of mixing the fatty acid salt-containing composition obtained in Step 1 with the components (B), (C) and (E).

Examples 1-1 to 1-26, Comparative Examples 1-1 to 1-10 (liquid skin cleanser with pouch container)
Manufactures liquid skin cleansing agents having the compositions shown in Tables 1 to 3 and measures the viscosity, as well as agent removability (dischargeability, presence / absence of breakage), ease of melting, low temperature stability, detergency and stickiness. Evaluation was made. The results are also shown in Tables 1 to 3.

(Production method)
(F) Potassium hydroxide (neutralizing agent) was added to a part of the water and heated to 80 ° C. (A) Fatty acid and (D) water-soluble polymer were dissolved by heating at 80 ° C., and component (D) was sufficiently dispersed. The (A) / (D) mixture dissolved by heating was added to the 80 ° C. aqueous potassium hydroxide solution prepared above. It was stirred for about 1 hour until uniform. Thereafter, (E) carbonate was dissolved in 80 ° C. water (the remainder of (F) water), ethylene glycol distearate was then added, and the resulting aqueous solution was charged. After cooling to 40 ° C. with stirring, component (B), component (C) and perfume were added. While stirring, the mixture was cooled to room temperature (25 ° C.) to obtain a liquid skin cleanser.
70 g of the obtained liquid skin cleansing agent was filled in a pouch container (a pouch container with a discharge port of 5 mmφ (length 140 × width 87 mm)).

(Evaluation method)
(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. The viscometer used was a B-type viscometer / VISCOMETER TVB-10M (manufactured by TOKI SANGYO CO., LTD).
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

(2-1) Agent takeout property (ejection property):
When three specialist panelists hold the container with the discharge port side perpendicular to the palm at 25 ° C, and gently push it out to remove 2.5g of liquid skin cleanser, the agent can be easily removed from the container. This was evaluated according to the following criteria. The average value of the results of three panelists was used as the evaluation result of the liquid skin cleanser.
5: It is not hard and is not loose and easy to discharge.
4: Slightly hard or slightly loose but easy to discharge.
3: Hard or loose but easy to discharge.
2: Hard or loose and slightly difficult to discharge.
1: It is too hard or too loose to discharge easily.

(2-2) Removability of agent (presence / absence of cutting):
When three specialist panelists each hold a container with the discharge port side perpendicular to the palm at 25 ° C, and gently push it out to remove 2.5g of liquid skin cleanser, it is taken out onto the palm. When the prepared agent was separated from the container palm, the absence of spinnability of the agent (the agent was broken) was evaluated according to the following criteria. Among the results of three panelists, the one with the highest evaluation result was judged as the agent take-out property (presence / absence of cutting).
○: The agent can be cut out from an easy container without stringing.
X: The agent twists the thread and does not easily break from the container.

(3) Ease of melting:
3 expert panelists took out 0.5g of liquid skin cleanser into their palms, added 2g of water and rubbed their hands 10 times, and it was easy to melt. The very slow case was set to 1, and the evaluation was made in five stages. The average value of the results of three panelists was used as the evaluation result of the liquid skin cleanser.

(4) Low temperature (10 ° C) stability:
Three expert panelists store the liquid skin cleanser filled in the container at 10 ° C for 1 week, evaluate the ease of taking out the agent at 10 ° C, and (2-1) agent takeout (dischargeability) Evaluation was made in five stages, with 5 being the dischargeability closest to evaluation 5 in the test and 1 being the farthest.
The average value of the results of three panelists was used as the evaluation result of the liquid skin cleanser.

(5) Detergency:
Three expert panelists applied 20 μL of carbon black-colored model comedo sebum to a 3.5 cmφ circular shape on the forearm, dried for 30 minutes, and then added 1 g of a 2.5% by weight aqueous solution of a liquid skin cleanser, 10 g Lightly massage with your index finger like drawing a circle, 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 average value of the results of three panelists was used as the evaluation result of the liquid skin cleanser.

(6) No stickiness:
Three specialist panelists used 0.5 g of liquid skin cleanser to wash the forearm of one arm and evaluated the non-stickiness after towel drying. The evaluation was made on a five-point scale, with 5 being a non-sticky state and 1 being a very sticky state. The average value of the results of three panelists was used as the evaluation result of the liquid skin cleanser.

Examples 2-1 to 2-21, Comparative Examples 2-1 to 2-9 (liquid skin cleansing agents in bottle containers)
A liquid skin cleanser having the composition shown in Tables 3 to 6 was produced, and the viscosity was measured in the same manner as in Example 1. The agent was easily taken out (dischargeability, presence or absence of breakage), easily melted down, and low temperature. Stability, detergency and non-stickiness were evaluated. The results are shown in Tables 3 to 6.

(Production method)
A liquid skin cleanser was produced in the same manner as in Example 1, and 100 g of the obtained liquid skin cleanser was filled in a bottle container (3 mmφ discharge port, diameter 5 cm, height 12 cm).

  Any of the liquid skin cleansing agents of Examples 1-1 to 1-26 and 2-1 to 2-21 is suitable as a liquid skin cleansing agent in a pouch container or a liquid skin cleansing agent in a bottle container. Further, the agent was easy to take out, melted and disintegrated quickly, easily extended, excellent in cleaning power, non-sticky, and good in low-temperature stability. Furthermore, after washing, all the professional panelists who were the subjects of this test felt that the skin was softly finished.

Examples 3-1 and 3-2
In the same manner as in Examples 1-1 to 2-21, skin cleansing compositions having the compositions shown in Table 7 and Table 8 were produced.
Any of the obtained liquid skin cleansers is suitable as a liquid skin cleanser in a bottle container. Further, the agent was easy to take out, melted and disintegrated quickly, easily extended, excellent in cleaning power, non-sticky, and good in low-temperature stability. Furthermore, after washing, all the professional panelists who were the subjects of this test felt that the skin was softly finished.

Claims (10)

The following components (A), (B), (C), (D), (E) and (F):
(A) Fatty acid salt 9-27 mass%,
(B) 0.3 to 3.5% by mass of an anionic surfactant other than component (A),
(C) Amphoteric surfactant 0.3-3.5% by mass,
(D) Water-soluble polymer 0.1 to 1.5% by mass,
(E) Carbonate 1.5-6% by mass,
(F) Liquid skin cleanser containing water.   The liquid skin cleanser according to claim 1, wherein the total content (D) + (E) of the components (D) and (E) is 1.5 to 7% by mass.   The liquid skin cleanser according to claim 1 or 2, wherein the viscosity at 30 ° C is 1000 to 100,000 mPa · s.   The liquid skin cleansing agent according to any one of claims 1 to 3, which has a viscosity at 30 ° C of 5,000 to 100,000 mPa · s and is used by filling a pouch container.   The liquid skin cleanser according to any one of claims 1 to 3, which has a viscosity at 30 ° C of 1000 to 6000 mPa · s and is used by being filled in a bottle container.   The liquid detergent according to any one of claims 1 to 5, wherein the component (B) is at least one selected from alkyl (ether) sulfates and alkyl ether carboxylates.   The liquid detergent according to any one of claims 1 to 6, wherein the component (C) is at least one selected from sulfobetaine surfactants and amide betaine surfactants.   The liquid detergent according to any one of claims 1 to 7, wherein the mass ratio (A) / (C) of the component (A) to the component (C) is 2 to 35.   Furthermore, the liquid cleaning composition of any one of Claims 1-8 containing an ester compound. The manufacturing method of the liquid skin cleanser of any one of Claims 1-9 including the following processes.
(Step 1) Mix the unneutralized product of component (A) with a neutralizer, component (D), or part or all of component (F) so that the neutralization rate is 95 to 100%. Obtaining a fatty acid salt-containing composition,
(Step 2) A step of mixing the fatty acid salt-containing composition obtained in Step 1 with the components (B), (C) and (E).