TWI750123B - Liquid skin cleanser - Google Patents

Abstract

The liquid skin cleanser provided by the present invention is easy to take out an appropriate amount from a container, dissolves and disintegrates quickly, has excellent cleaning power, and can obtain a refreshing feeling.

The liquid skin cleanser of the present invention contains the following components (A), (B), (C), (D), (E) and (F): (A) 9 to 27% by mass of fatty acid salt, ( B) 0.3 to 3.5 mass % of anionic surfactants other than component (A), (C) 0.3 to 3.5 mass % of amphoteric surfactants, (D) 0.1 to 1.5 mass % of water-soluble polymers, (E) 1.5 mass % of carbonate ~6 mass %, (F) water.

Description

liquid skin cleanser

The present invention relates to liquid skin cleansers.

Conventionally, skin cleansers require foaming, cleansing power, and freshness after washing, and solid soaps mainly composed of alkali metal salts of higher fatty acids are used (eg, Patent Document 1, Patent Document 2).

However, the dissolution and collapse of solid soaps are slower and less prone to foaming. In addition, it may suffer from contamination or performance degradation during use, and there may be cases where it cannot be used up to the end.

On the other hand, liquid skin cleansers are known as means for such a problem (for example, Patent Document 3). Liquid skin cleansers are easier to clean than solid soaps.

[Patent Document 1] Japanese Patent Laid-Open No. 2001-64691

[Patent Document 2] Japanese Patent Publication No. 2014-526436

[Patent Document 3] Japanese Patent Publication No. 2009-529588

The present invention relates to a liquid skin cleanser comprising the following components (A), (B), (C), (D), (E) and (F): (A) 9 to 27 mass % of fatty acid salts, (B) 0.3 to 3.5 mass % of anionic surfactants other than component (A), (C) 0.3 to 3.5 mass % of amphoteric surfactants, (D) water-soluble polymer 0.1-1.5 mass %, (E) carbonate 1.5-6 mass %, (F) water.

Furthermore, the present invention relates to a method for producing the above-mentioned liquid skin cleanser, comprising the following steps: (step 1) unneutralizing the component (A) and the neutralizing agent, the component (D), and the component (F) a part or all of it is mixed according to the mode that the neutralization rate becomes 95~100%, and the step of obtaining the fatty acid salt-containing composition; (step 2) the fatty acid salt-containing composition and components obtained in step 1 are obtained (B), (C) and (E) the step of mixing.

Conventional liquid skin cleansers have problems with over-extrusion from the container, or over-use. In addition, soaps with higher cleaning properties are required from the characteristics required by the market in recent years.

The present invention relates to a liquid skin cleanser which is easy to take out an appropriate amount from a container, dissolves and disintegrates quickly, has excellent detergency, and provides a refreshing feeling.

The present inventors found that by using fatty acid salts, other anionic surfactants and A liquid skin cleanser that solves the above problems can be obtained by using an amphoteric surfactant as a cleansing ingredient in combination with a water-soluble polymer and a carbonate in a specific ratio.

The liquid skin cleanser of the present invention is easy to take out an appropriate amount from the container, and the cleanser does not tangle when taking out the cleanser, dissolves and collapses quickly, stretches easily, foams well, has excellent cleaning power, and does not stain sticky. Moreover, the extractability at low temperature was also favorable. Suitable for filling into soft bag containers and bottle containers.

The fatty acid salt of the component (A) is preferably represented by the general formula (1): [Chemical 1]R ¹ -COOX (1)

(In the formula, R ¹ represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms; X represents an alkali metal, ammonium, ammonium derived from alkanolamine, or basic amino acid).

More specifically, it can be mixed with, for example, salts of lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, behenic acid, and the like, among which, the preferred ones are At least one selected from the salts of lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid. Examples of such 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, for example, by mixing unneutralized fatty acid and a neutralizing agent to form a fatty acid salt in the composition.

The neutralizer is an alkaline compound, such as sodium hydroxide, potassium hydroxide, Triethanolamine, basic amino acid, etc. Among these, it is preferable to select one from potassium hydroxide and sodium hydroxide from a viewpoint of improving skin cleansing property, and a viewpoint of reducing the coloring property and odor of a liquid skin cleansing agent.

The fatty acid salts of the component (A) can be used alone or in combination of two or more. From the viewpoints of the ease of taking out the liquid skin cleanser from the container and the improvement of dissolving and collapsibility, the content is based on the fatty acid. 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, particularly preferred 14% by mass or more, preferably 27% by mass or less, more preferably 25% by mass or less, 22 mass % or less of the most preferred type, and 18 mass % or less of the best type. In addition, the content of the component (A) is 9 to 27 mass % in the total composition in terms of fatty acids, and from the same viewpoint, preferably 9.5 to 25 mass %, more preferably 11 to 22 mass %, and particularly preferably 14 to 18 mass %.

The anionic surfactants of the component (B) are generally used for skin cleansing agents except for the component (A), for example, alkyl (ether) sulfates, allyl (ether) sulfates, Alkyl ether carboxylates, alkyl benzene sulfonates, alkane sulfonates, olefin sulfonates, alkyl ether sulfonates, glyceryl ether sulfonates, alpha methyl ester sulfonates, sulfofatty acid salts, alkanes Alkyl sulfate, fatty alcohol ether sulfate, glycerol ether sulfate, hydroxy mixed ether sulfate, monoglyceride (ether) sulfate, fatty acid amide (ether) sulfate, monoalkylsulfosuccinate, dioxane Sulfosuccinates, monoalkyl sulfosuccinates, dialkyl sulfosuccinates, sulfotriglycerides, amide ether carboxylates and their salts, fatty acid hydroxyethyl Sulfonate, fatty acid sarcosinate, fatty acid tauride (fatty acid tauride); Amino acid salt; alkyl oligoglucoside sulfate, protein fatty acid condensate (small wheat-based plant products), alkyl (ether) phosphates, etc.

Among them, from the viewpoint of improving low temperature stability, cleaning power, and dissolving and collapsing properties, at least one of alkyl (ether) sulfates and alkyl ether carboxylates is preferably selected, and two are more preferred. All contain. In addition, the liquid skin cleanser of the present invention containing these components (B), in particular, containing at least one selected from among alkyl (ether) sulfates and alkyl ether carboxylates, is excellent in low-temperature stability, so The liquid skin cleanser can also be taken out of the container well at low temperature.

In the present invention, "removability of the liquid skin cleanser from the container" means that an appropriate amount of the liquid skin cleanser can be easily taken out of the container, and the cleanser does not become tangled when the cleanser is taken out.

In general, although surfactants contribute to detergency, in compositions containing them, since the surfactants form rope-like cells, the detergents tend to be stretched when the detergents are taken out. However, even if the present invention contains a surfactant, the combination with a specific component can achieve excellent detergency, the liquid skin cleanser can be easily taken out of the container in an appropriate amount, and the cleansing agent does not appear when the cleansing agent is taken out. The unique effect of pulling wire.

Component (B) can be used alone or in combination of two or more, and its content is 0.3 mass % or more, preferably 0.4 in the total composition, from the viewpoint of improving low-temperature stability, cleaning power, and dissolving and collapsing properties. mass % or more, more preferably 0.5 mass % or more, particularly preferred 0.7 mass % or more, and 3.5 mass % or less, more preferably 3.3 mass % or less, more preferably 3.2 mass % or less, and particularly preferred 2.5 mass % or less . Moreover, content of a component (B) is 0.3-3.5 mass % in a total composition, Preferably it is 0.4-3.3 mass %, More preferably, it is 0.5-3.2 mass %, Especially preferably, it is 0.7-2.5 mass %.

The amphoteric surfactant of the component (C) can be used as long as it is usually used in skin cleansers, and examples thereof include betaine acetate type surfactants such as lauryl dimethylamino acetate betaine; Amine oxide type surfactants such as amines; imidazoline betaine type surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazoline betaine; amides such as lauric acid amidopropyl betaine Betaine-type surfactants; sulfobetaine-type surfactants such as lauryl hydroxysulfobetaine, etc.

Among these, from the viewpoints of low temperature stability, detergency, non-stick viscosity, and ease of dissolving and collapsing, it is preferable to select at least one of sultaine-type surfactants and amidobetaine-type surfactants Among the sulfobetaine-type surfactants, lauryl hydroxysulfobetaine is preferred, and among the amide betaine-type surfactants, the preferred system is amidopropyl betaine laurate.

Component (C) can be used alone or in combination of two or more. From the viewpoints of low temperature stability, cleaning power, non-stick viscosity, and ease of dissolving and collapsing of the liquid skin cleanser, the content is in the total. The composition is 0.3 mass % or more, preferably 0.4 mass % or more, more preferably 0.5 mass % or more, particularly preferably 0.7 mass % or more, most preferably 0.9 mass % or more, and 3.5 mass % or less, more preferably 3.3 mass % or less, more preferably 3.1 mass % or less, particularly preferred 2.9 mass % or less, and most preferably 2.7 mass % or less. In addition, the content of the component (C) in the total composition is 0.3 to 3.5 mass %, preferably 0.4 to 3.3 mass %, more preferably 0.5 to 3.1 mass %, particularly preferably 0.7 to 2.9 mass %, and most preferably 0.7 to 2.9 mass %. 0.9 to 2.7 mass %.

In the present invention, the mass ratio (A)/(C) of the component (A) with respect to the component (C) is determined from the From the viewpoint of skin cleansing properties, and from the viewpoint of reducing the coloring property and odor of the liquid skin cleanser, preferably 2 or more, more preferably 4 or more, particularly preferably 6 or more, and more preferably 35 or less, more preferably Department of 20 or less, excellent Department of 12 or less. Moreover, the mass ratio (A)/(C) of the component (A) with respect to the component (C) is preferably 2 to 35, more preferably 4 to 20, and particularly preferably 6 to 12.

The water-soluble polymer of the component (D) may be used in ordinary skin cleansing agents.

Water-soluble polymer From the viewpoint of improving the moderate extraction property and low-temperature stability of the liquid skin cleanser, suitable water-soluble polymer systems include, for example, acrylic acid·(methyl acrylate) such as acrylic acid/alkyl acrylate cross-linked polymer. ) copolymers of alkyl acrylates, cellulose to which hydroxyethyl or hydroxypropyl is added, and the like.

Acrylic acid·(meth)acrylic acid alkyl ester copolymer can be used, for example: PEMULEN TR-1, PEMULEN TR-2, CARBOPOL ETD2020, CARBOPOL 1382, CARBOPOL 1342 (all of the above are Lubrizol Advanced Materials) manufactured); AQUPEC HV-501ER (manufactured by Sumitomo Seika Co., Ltd.) and other commercially available products.

In addition, the hydroxyethyl group or hydroxypropyl group added cellulose has a part of hydrogen atoms of the hydroxyl group of cellulose substituted with hydroxyethyl group or hydroxypropyl group, and may have other substituents.

Specifically, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, etc. are mentioned, for example.

These systems react cellulose with caustic soda to form alkali cellulose, and then react with methyl chloride, monochloroacetic acid, ethylene oxide, propylene oxide, etc. to replace the hydrogen atoms of the hydroxyl groups of cellulose with hydroxyl groups. Ethyl, hydroxypropyl, methyl, carboxymethyl, etc. are obtained.

These celluloses have an average degree of substitution from the viewpoint of improving foamability and foam sustainability. More than 0, more preferably 0.5 or more, more preferably 3 or less, more preferably 2 or less. In addition, the weight average molecular weight is preferably 200,000 or more, more preferably 500,000 or more, particularly preferably 650,000 or more, and more preferably, from the viewpoint of improving the solubility in the liquid detergent composition, foamability, and foam sustainability. It is less than 3,000,000, more preferably less than 2,000,000, and more preferably less than 1,600,000.

In addition, in the present invention, the average degree of substitution is determined by NMR, and the weight average molecular weight is determined by a gel permeation chromatography (GPC)-multi-angle laser light scattering detector (MALLS) using a standard substance of ethylene oxide. ) system to measure.

The hydroxyethyl or hydroxypropyl added cellulose is preferably hydroxyethyl cellulose or hydroxypropyl methyl cellulose, preferably one with an average degree of substitution of 0.5 to 2 and a weight average molecular weight of 650,000 to 1,600,000.

Cellulose to which hydroxyethyl or hydroxypropyl has been added, hydroxyethyl cellulose can be used, for example: CELLOSIZE QP52000H (Dow Chemical); HEC Daicel SE400, SE500, SE600, SE850, SE900 ( All of the above are commercially available products such as Daicel Finechem Co., Ltd.; hydroxypropyl methylcellulose can be used, for example: METOLOSE 60SH, 65SH (all of the above are manufactured by Shin-Etsu Chemical Co., Ltd.); BENECEL E50, E4M , E10M, F4MC, K99C, K4M, K15M, K35M, K100M, K200M (all of the above are manufactured by Ashland) and other commercial products.

Component (D) can be used alone or in combination of two or more. From the viewpoint of improving the moderate take-out property and low-temperature stability of the liquid skin cleanser, the content is in the total composition. Medium is 0.1 mass % or more, preferably 0.2 mass % or more, more preferably 0.25 mass % or more, particularly preferably 0.27 mass % or more, and 1.5 mass % or less, preferably 1.3 mass % or less, more preferably 1 mass % or less, particularly preferred is 0.8 mass % or less. In addition, the content of the component (D) is 0.1 to 1.5 mass %, preferably 0.2 to 1.3 mass %, more preferably 0.25 to 1 mass %, and particularly preferably 0.27 to 0.8 mass % in the total composition from the same viewpoint. %.

Examples of carbonates of the component (E) include alkali metal salts such as sodium carbonate, potassium carbonate, sodium bicarbonate, and potassium bicarbonate; alkali metal salts such as calcium carbonate, magnesium carbonate, and magnesium bicarbonate; ammonium carbonate and ammonium bicarbonate such as ammonium salts and so on.

Among these, from the viewpoints of water solubility in the properties of the detergent, and from the viewpoints of improving the appropriate ease of taking out and cleaning properties of the detergent, sodium carbonate, potassium carbonate, sodium bicarbonate, and bicarbonate are preferred. Select at least one type of potassium.

The component (E) can be used alone or in combination of two or more, and is preferably contained in an amount of 1.5 mass % or more in the total composition from the viewpoints of cleansing power and ease of taking out a liquid skin cleanser moderately. 1.6 mass % or more, more preferably 1.8 mass % or more, particularly preferred 2.5 mass % or more, and 6 mass % or less, preferably 5.5 mass % or less, more preferably 5 mass % or less, and particularly preferred 4.5 mass % %the following. Moreover, content of a component (E) is 1.5-6 mass % in a total composition, Preferably it is 1.6-5.5 mass %, More preferably, it is 1.8-5 mass %, Especially preferably, it is 2.5-4.5 mass %.

In the present invention, the total content of the components (D) and (E) is preferably 1.5 in the total composition from the viewpoints of improving the skin cleansing properties and reducing the coloration and odor of the liquid skin cleansing agent. % by mass or more, more than 2% by mass of the better system, and less than 3% by mass of the best system above, and preferably 7 mass % or less, more preferably 6 mass % or less, and particularly preferably 5 mass % or less. In addition, the total content of the components (D) and (E) in the total composition is preferably 1.5 to 7 mass %, more preferably 2 to 6 mass %, and particularly preferably 3 to 5 mass %.

The water system of the component (F) is used as a solvent, and its content is preferably 40% by mass or more, more preferably 50% by mass or more, particularly preferably 54% by mass or more, and more preferably 90% by mass or less, in the total composition. More preferably, it is 85 mass % or less, and particularly preferable is 80 mass % or less. In addition, the content of the component (F) is preferably 40 to 90 mass %, more preferably 50 to 85 mass %, and particularly preferably 54 to 80 mass % in the total composition.

In the present invention, since the component (E) is contained in the composition, if an acid is present in the composition, the carbonate of the component (E) reacts with the acid to generate carbon dioxide gas, so that an appropriate viscosity cannot be achieved, and it is difficult to achieve both Moderate ease of removal and dissolving collapsibility. Therefore, when not only the component (A) but also the component (D) is an acid, it is preferable to perform neutralization.

The neutralization ratio of the total of the component (A) and the component (D) is preferably 0.95 to 1.05, and more preferably 0.98 to 1.02, from the viewpoint of improving both the ease of taking out moderately and the dissolving collapsibility.

The liquid skin cleanser of the present invention may further contain components generally used in cleansers, such as surfactants other than components (A), (B) and (C), moisturizing agents, oily components, bactericides, Anti-inflammatory agents, preservatives, chelating agents, tackifiers, salts, pearlescent agents, scrubbing agents, fragrances, cooling agents, pigments, UV absorbers, antioxidants, plant extracts, etc.

The liquid skin cleanser of the present invention preferably contains an ester compound from the viewpoint of improving the ease of taking out from the container and the dissolving and collapsibility. Among the ester compounds, glycol difatty acid ester is more preferable, and the From ethylene glycol dioleate, ethylene glycol dilaurate At least one selected from the group consisting of ethylene glycol distearate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate, particularly preferably selected from ethylene glycol dioleate, ethylene glycol dilaurate and At least 1 type is selected from ethylene glycol distearate.

From the same viewpoint, the content of the above-mentioned ester compound is preferably 0.01 mass % or more, more preferably 0.1 mass % or more, particularly preferably 0.4 mass % or more, preferably 4 mass % or less, more preferably 0.4 mass % or more in the total composition. It is 3 mass % or less, and particularly preferably 2 mass % or less. In addition, the content of the ester compound in the total composition is preferably 0.01 to 4 mass %, more preferably 0.1 to 3 mass %, and particularly preferably 0.4 to 2 mass %.

The liquid skin cleanser of the present invention can be produced by mixing the formulation components by a usual method.

For example, it can be manufactured by a method including the following steps 1 and 2.

(Step 1) Mix the unneutralized product of the component (A), the neutralizing agent, the component (D), and a part or all of the component (F) so that the neutralization rate becomes 95 to 100%, and obtain The step of fatty acid salt-containing composition; (step 2) the step of mixing the fatty acid salt-containing composition obtained in step 1 with components (B), (C) and (E).

In this way, by neutralizing the component (A) and the component (D) in advance, and then mixing with the component (E), the generation of carbon dioxide gas can be suppressed to the minimum limit, and a suitable extraction ease and dissolution can be obtained. Dispersible liquid skin cleanser.

The container for accommodating the liquid skin cleanser of the present invention can be selected from various containers such as bottles, hard tubes, pumps, and soft bags according to the viscosity and capacity. Its material is plastic, glass, metal, or a composite of these can be used. Moderate ease of removal from liquid skin cleansers From the viewpoint of being excellent in economical efficiency, a soft bag container or a bottle container is preferable.

The so-called soft bag container refers to, for example, a bag body made of resin that is appropriately laminated with an outer resin film layer that is excellent in printability and has barrier properties to the contents, and an inner resin film layer that is excellent in sealing properties (heat-sealability, etc.). A flat bag-shaped container produced by sealing (heat-sealing, etc.) the left and right edges and bottom edges of the films; or sandwiching another resin film between the above-mentioned resin films, and then sealing the peripheral edge to produce The self-supporting bag-like container (so-called stand-up pouch) and so on.

From the viewpoint of moderate ease of taking out the skin cleanser, a soft bag container with a spout is preferred.

The bottle container is not particularly limited and can be used. The material of the bottle container can be selected from polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol resin, acrylonitrile-styrene resin, ABS resin, polyamide It can be appropriately selected from resin containers and glass containers. Moreover, as for the structure of a bottle container, it is preferable to set it as a single-layer or a two-layer or more layer structure.

The liquid skin cleansing agent of the present invention has the characteristics that it is easy to take out moderately and the cleansing agent does not become tangled when taking out the cleansing agent. In order to improve the ease of removal of the liquid skin cleanser, this can be achieved by reducing the viscosity. However, there is a problem that the liquid skin cleanser tends to flow out of the container. If the viscosity is increased in order to suppress this phenomenon, the liquid skin cleanser is difficult to take out, the cleanser tends to be tangled when taking out the cleanser, and the cleanser has poor cohesion when taken in the palm of the hand, making it difficult to stretch. However, according to the present invention, by having the above-mentioned configuration, the liquid skin cleanser can be easily and moderately taken out, and on the other hand, the outflow from the container is suppressed, the threading of the cleanser is suppressed, and the dissolving and collapsing properties are excellent, so that it is possible to It achieves the excellent effect of easy stretching of the detergent. In the present invention, taking out easily and moderately means that the cleansing agent is easy to take out from the container, and on the other hand, the liquid skin cleansing agent does not overflow from the container all at once. The liquid skin cleanser of the present invention can achieve such performance by adjusting the viscosity to an appropriate viscosity according to the container used.

The liquid skin cleanser of the present invention is liquid at 30°C, and from the viewpoint of improving the ease of taking out moderately, the viscosity at 30°C is preferably 1,000-100,000 mPa·s, more preferably 1,500-90,000 mPa·s, and particularly preferably The range is 1800~80000mPa‧s, and the best range is 2000~70000mPa‧s.

When the liquid skin cleanser of the present invention is filled in a soft bag container for use, the viscosity at 30°C is preferably 5000~100000mPa·s, more preferably 7000~70000mPa·s, particularly preferably 9000~40000mPa·s, The best system is 10000~20000mPa·s.

Furthermore, when filling in a bottle container for use, the viscosity at 30°C is preferably 1000~6000mPa·s, more preferably 1500~5500mPa·s, and particularly preferably 2000~6000mPa·s.

In addition, in the present invention, the viscosity was measured at 30°C using a Brookfield viscometer/VISCOMETER TVB-10M (manufactured by TOKI SANGYO CO., LTD.).

The liquid skin cleansing agent of the present invention is preferably used as, for example, a facial cleanser, a body wash, a hand soap, and the like, and more preferably a body wash.

The liquid skin cleanser of the present invention can be used by applying it to the skin, more specifically, any place such as the scalp, face, body, hands and feet, and then rinsing with water.

Regarding the above-mentioned embodiments, the present invention further discloses the following compositions.

<1> A liquid skin cleanser comprising the following components (A), (B), (C), (D), (E) and (F): (A) 9-27% by mass of fatty acid salt, (B) 0.3 to 3.5 mass % of anionic surfactants other than component (A), (C) 0.3 to 3.5 mass % of amphoteric surfactants, (D) 0.1 to 1.5 mass % of water-soluble polymers, (E) carbonate 1.5 to 6 mass %, (F) water.

<2> The liquid skin cleanser according to the above <1>, wherein the fatty acid salt of the component (A) is preferably represented by the general formula (1): [Chemical 2]R ¹ -COOX (1)

(in the formula, R ¹ represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms; X represents an alkali metal, ammonium, ammonium or basic amino acid derived from alkanolamine) More preferably At least one selected from the salts of lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, and stearic acid, and particularly preferably selected from lauric acid, myristic acid, At least one of the salts of palmitic acid, stearic acid, and oleic acid is selected.

<3> The liquid skin cleanser according to the above <1> or <2>, wherein the content of the component (A) is preferably 9.5 mass % or more in the total composition in terms of fatty acid, more preferably 11 mass % or more, particularly preferred 14 mass % or more, preferably 25 mass % or less, more preferably 22 mass % or less, and particularly preferred 18 mass % or less.

<4> The liquid skin cleanser according to any one of the above <1> to <3>, wherein the anionic surfactant of the component (B) is preferably selected from an alkyl (ether) sulfate and an alkyl At least one of ether carboxylates is selected, and it is more preferable to contain both of them.

<5> The liquid skin cleanser according to any one of the above <1> to <4>, wherein the content of the component (B) is preferably 0.4 mass % or more in the total composition, more preferably 0.5 mass % or more, particularly preferably 0.7 mass % or more, preferably 3.3 mass % or less, more preferably 3.2 mass % or less, and particularly preferably 2.5 mass % or less.

<6> The liquid skin cleanser according to any one of the above <1> to <5>, wherein the amphoteric surfactant of the component (C) is preferably a sulfobetaine-type surfactant and an amide At least one of the betaine-type surfactants is selected, more preferably lauryl hydroxysulfobetaine and lauric acid amidopropyl betaine.

<7> The liquid skin cleanser according to any one of the above <1> to <6>, wherein the content of the component (C) is preferably 0.4 mass % or more in the total composition, more preferably 0.5 mass % or more, particularly preferred 0.7 mass % or more, optimum 0.9 mass % or more, and preferred 3.3 mass % or less, more preferably 3.1 mass % or less, particularly preferred 2.9 mass % or less, and optimum 2.7 mass % or less.

<8> The liquid skin cleanser according to any one of the above <1> to <7>, wherein the mass ratio (A)/(C) of the component (A) to the component (C) is preferably 2 or more, more preferably 4 or more, extra-best 6 or more, and preferably 35 or less, more preferably 20 or less, Special class below 12.

<9> The liquid skin cleanser according to any one of the above <1> to <8>, wherein the water-soluble polymer of the component (D) is preferably an acrylic acid·(meth)acrylic acid alkyl ester Select at least one of the copolymers of , and cellulose to which hydroxyethyl and hydroxypropyl are added.

<10> The liquid skin cleanser according to any one of the above <1> to <9>, wherein the content of the component (D) is preferably 0.2 mass % or more in the total composition, more preferably 0.25 mass % or more, particularly preferably 0.27 mass % or more, preferably 1.3 mass % or less, more preferably 1 mass % or less, and particularly preferably 0.8 mass % or less.

<11> The liquid skin cleanser according to any one of the above <1> to <10>, wherein the carbonate of the component (E) is preferably selected from the group consisting of sodium carbonate, potassium carbonate, sodium hydrogencarbonate, hydrogencarbonate Select at least one type of potassium.

<12> The liquid skin cleanser according to any one of the above <1> to <11>, wherein the content of the component (E) is preferably 1.6 mass % or more in the total composition, more preferably 1.8 mass % % or more, particularly preferably 2.5 mass % or more, more preferably 5.5 mass % or less, more preferably 5 mass % or less, and particularly preferably 4.5 mass % or less.

<13> The liquid skin cleanser according to any one of the above <1> to <12>, wherein the total content of the components (D) and (E) is preferably 1.5% by mass in the total composition above, more preferably 2 mass % or more, particularly preferably 3 mass % or more, more preferably 7 mass % or less, more preferably 6 mass % or less, and particularly preferably 5 mass % or less.

<14> The liquid skin cleanser according to any one of the above <1> to <13>, wherein the water content of the component (F) is preferably 40% by mass or more in the total composition, more preferably More than 50% by mass, more than 54% by mass of the most preferred system, and more than 90% by mass of the preferred system or less, more preferably 85 mass % or less, and particularly preferably 80 mass % or less.

<15> The liquid skin cleanser according to any one of the above <1> to <14>, wherein the neutralization rate to the total of the component (A) and the component (D) is preferably 0.95 to 1.05, or more The best line is 0.98~1.02.

<16> The liquid skin cleanser according to any one of the above <1> to <15>, which preferably further contains an ester compound, more preferably contains a glycol difatty acid ester, and particularly preferably Contains at least one selected from the group consisting of ethylene glycol dioleate, ethylene glycol dilaurate, ethylene glycol distearate, propylene glycol dilaurate and propylene glycol distearate, and the optimum one contains At least one selected from ethylene glycol dioleate, ethylene glycol dilaurate, and ethylene glycol distearate.

<17> The liquid skin cleanser according to the above <16>, wherein the content of the ester compound is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, and particularly preferably 0.4% by mass in the total composition % or more, preferably 4 mass % or less, more preferably 3 mass % or less, and particularly preferably 2 mass % or less.

<18> The liquid skin cleanser according to any one of the above <1> to <17>, wherein the viscosity at 30°C is preferably 1,000 to 100,000 mPa·s, more preferably 1,500 to 90,000 mPa·s, The best system is 1800~80000mPa‧s, and the best system is 2000~70000mPa‧s.

<19> The liquid skin cleanser according to any one of the above <1> to <18>, wherein the liquid skin cleanser according to any one of the above <1> to <18> is used by filling in a soft bag container, and the viscosity at 30° C. is preferably 5,000 to 100,000 mPa·s, The best system is 7000~70000mPa‧s, the best system is 9000~40000mPa‧s, and the best system is 10000~20000mPa‧s.

<20> The liquid skin cleanser according to any one of the above <1> to <18>, wherein the liquid skin cleanser according to any one of the above <1> to <18> is used by filling a bottle container, and the viscosity at 30° C. is preferably 1000 to 6000 mPa·s, or more The best series is 1500~5500mPa‧s, and the best series is 2000~6000mPa‧s.

<21> A method for producing a liquid skin cleanser, which is the method for producing a liquid skin cleanser according to any one of the above <1> to <20>, comprising the following steps 1 and 2: (step 1) The unneutralized product of component (A) and the neutralizing agent, component (D), and a part or all of component (F) are mixed so that the neutralization rate becomes 95 to 100% to obtain a fatty acid salt-containing composition. The step of composition; (step 2) the step of mixing the fatty acid salt-containing composition obtained in step 1 and components (B), (C) and (E).

[Example]

Examples 1-1 to 1-26, Comparative Example 1-10 (liquid skin cleanser in a soft bag container)

Liquid skin cleansers having the compositions shown in Tables 1 to 3 were produced, the viscosity was measured, and the cleansers were evaluated for their take-out properties (ejectability, presence or absence of breakage), ease of dissolving and collapsing, low-temperature stability, detergency, and cleanliness. Dip viscosity. The results are combined and shown in Tables 1 to 3.

(Production method)

Potassium hydroxide (neutralizing agent) was added to a part of (F) water, and it heated to 80 degreeC. The (A) fatty acid and the (D) water-soluble polymer were heated and dissolved at 80° C. to sufficiently disperse the component (D). Into the 80°C potassium hydroxide aqueous solution prepared above, the solution was heated and dissolved. (A)/(D) mixture. It was stirred for about 1 hour until it became homogeneous. Then, (E) carbonate was put into this, it was made to melt|dissolve in 80 degreeC water (remaining (F) water), ethylene glycol distearate was put in next, and the obtained aqueous solution was put in. After cooling to 40 degreeC, stirring, a component (B), a component (C), and a fragrance|flavor were added. It cooled to room temperature (25 degreeC), stirring, and the liquid skin cleanser was obtained.

吐出口的軟袋容器(長140×寬87mm))中。 70 g of the obtained liquid skin cleanser was filled in a soft bag container (with 5 mm

into a soft bag container (length 140×width 87mm) which was spit out.

(Evaluation method)

(1) Viscosity determination:

Fill about 50g of each liquid skin cleanser into a container (spiral tube (with lid and tight), transparent NO. 750mL 35×78×20mm (manufactured by Maruemu)) in such a way that air bubbles are not mixed, After setting the temperature in a water bath set at 30° C. for about 1 hour and adjusting the temperature, the viscosity was measured for 1 minute for the measurement time. As the viscosity measuring machine, a B-type viscometer/VISCOMETER TVB-10M (manufactured by Toki Sangyo Co., Ltd.) was used.

First, the measurement is performed under the condition (i), and if the measured value is within the accuracy range and a stable measured value can be obtained, it is used as the measured value. However, if the measured value is outside the precision range, or when the stable measured value cannot be obtained due to the upper and lower limits of the precision range, the measurement is performed according to the condition (ii). Repeat this operation to obtain a stable measurement value. In addition, the composition measurement time at each rotation number is 1 minute.

(i) NO.M4: 6rpm

(ii) NO.M4: 12rpm

(iii) NO.M4: 30rpm

(iv) NO.M3: 30rpm

(v) NO.M2: 30rpm

(iv) NO.M1: 30rpm

(2-1) Detergent take-out property (spit property)

When three professional reviewers hold the container with their palms facing the spout side at 25°C, and take out 2.5g of the liquid skin cleanser with a light pressure, the ease of taking out the cleanser from the container is as follows: Evaluation was performed according to the following criteria. The average value of the results of the three examiners was used as the evaluation result of the liquid skin cleanser.

5: Not hard, not loose, and easy to spit out.

4: Although slightly hard or slightly loose, it is easy to spit out.

3: Although hard or loose, it is easy to spit out.

2: Hard or loose, slightly difficult to spit out.

1: Too hard or too loose, making it difficult to spit out.

(2-2) Extractability of detergent (with or without disconnection):

At 25°C, three professional reviewers hold the container with their palms vertically facing the side of the spout, and press lightly to take out 2.5g of the liquid skin cleanser. When the cleanser taken out from the palm leaves the container , according to the following criteria, the non-stretching property of the detergent (the detergent is broken) was evaluated. Among the results of the three examiners, those with more evaluation results were judged to be the extractability of the detergent (presence or absence of breakage).

○: The detergent is not tangled and easily disconnected from the container.

×: The cleaning agent was tangled and could not be easily disconnected from the container.

(3) Ease of dissolving and collapsing:

Three professional reviewers took out 0.5g of the liquid skin cleanser on the palm, added 2g of water and rubbed each other 10 times. Regarding the ease of dissolving and collapsing at this time, the evaluation was 5 when the dissolving and collapsing was very fast, and 5 when the dissolving and collapsing was very fast. When it is very slow, the evaluation is 1, and the evaluation is performed in 5 steps. The average value of the results of the three examiners was used as the evaluation result of the liquid skin cleanser.

(4) Low temperature (10℃) stability:

The liquid skin cleanser filled in the container was stored at 10°C for 1 week by 3 professional reviewers, and the ease of taking out the cleanser at 10°C was evaluated, and the one closest to (2-1) was the cleanser. The evaluation of the dischargeability of the evaluation 5 in the sex (exudation property) test was 5, and the evaluation of the most distant person was 1, and the evaluation was carried out in 5 stages.

The average value of the results of the three examiners was used as the evaluation result of the liquid skin cleanser.

(5) Cleaning power:

圓形塗抹經碳黑著色的模型粉刺皮脂(model comedones sebum)20μL，經乾燥30分鐘後，將液體皮膚洗淨劑的2.5質量%水溶液1g，依畫圓10次的方式用食指輕輕按摩，然後利用自來水充分清洗。針對洗淨後的狀態，將完全沒有髒污的狀態評價為5，將髒污完全沒有掉落的狀態評價為1，依5階段施行評價。將3位審查人員的結果平均值設為液體皮膚洗淨劑的評價結果。 3.5cm on the forearm by 3 professional reviewers

Apply 20 μL of model comedones sebum colored with carbon black in a circular shape, and after drying for 30 minutes, apply 1 g of a 2.5% by mass aqueous solution of liquid skin cleanser, and gently massage with the index finger in a circle 10 times. Then rinse thoroughly with tap water. Regarding the state after washing, the state in which there was no contamination at all was evaluated as 5, and the state in which the contamination was not dropped at all was evaluated as 1, and the evaluation was performed in five steps. The average value of the results of the three examiners was used as the evaluation result of the liquid skin cleanser.

(6) Non-stick viscosity:

Three professional reviewers used 0.5g of liquid skin cleanser to wash the forearm of one arm, and evaluated the non-stick viscosity after towel drying. The state with no adhesion at all was evaluated as 5, and the state with very adhesion was evaluated as 1, and the evaluation was performed in 5 steps. The average value of the results of the three examiners was used as the evaluation result of the liquid skin cleanser.

Examples 2-1 to 2-21, Comparative Examples 2-1 to 2-9 (bottle-packed liquid skin cleanser)

Liquid skin cleansers having the compositions shown in Tables 4 to 6 were produced, and the viscosity was measured in the same manner as in Example 1, and the cleansers were evaluated for their extractability (dispensability, presence or absence of breakage), ease of dissolving and collapsing, and low temperature. Stability, cleaning power and non-stick viscosity. The results are combined and shown in Tables 4 to 6.

(Production method)

吐出口、直徑5cm、高度12cm)。 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 mm

Spit port, diameter 5cm, height 12cm).

The liquid skin cleansers of Examples 1-1 to 1-26 and 2-1 to 2-21 are all suitable as liquid skin cleansers in soft bag containers or liquid skin cleansers in bottle containers. In addition, the cleaning agent is easy to take out, dissolves and disintegrates quickly, stretches easily, has excellent cleaning power, does not stick, and has good low-temperature stability. In addition, after washing, the professional examiners who belonged to the test subjects felt that the skin was soft after washing.

Embodiment 3-1, 3-2

Skin cleansers having compositions shown in Tables 7 and 8 were produced in the same manner as in Examples 1-1 to 2-21.

All of the obtained liquid skin cleansers are suitable as bottled liquid skin cleansers. In addition, the cleaning agent is easy to take out, dissolves and disintegrates quickly, stretches easily, has excellent cleaning power, does not stick, and has excellent low temperature stability. In addition, after washing, the professional examiners who belonged to the test subjects felt that the skin was soft after washing.

Claims (12)

A liquid skin cleanser comprising the following components (A), (B), (C), (D), (E) and (F): (A) from lauric acid, myristic acid, palmitic acid, Salt of at least one fatty acid selected from stearic acid and oleic acid 9 to 27 mass %, (B) 0.3 to 3.5 of at least one selected from alkyl (ether) sulfate and alkyl ether carboxylate % by mass, (C) 0.3 to 3.5 mass % of at least one selected from among sulfobetaine-type surfactants and amide betaine-type surfactants, (D) from acrylic acid·(meth)acrylate alkyl ester At least one 0.1-1.5 mass % of the copolymer, hydroxyethyl or hydroxypropyl-added cellulose, (E) carbonate 1.5-6 mass %, (F) water; and component (D) ) and (E) total content (D)+(E) is 1.6-7 mass %. The liquid skin cleanser according to claim 1, wherein the total content (D)+(E) of the components (D) and (E) is 2 to 6 mass %. The liquid skin cleanser according to claim 1, wherein the content of the component (A) is 14 to 18% by mass. The liquid skin cleanser according to claim 1, wherein the content of the component (B) is 0.7 to 2.5 mass %. The liquid skin cleanser according to claim 1, wherein the viscosity at 30°C is 1000~100000mPa·s. The liquid skin cleanser according to claim 1, wherein the viscosity at 30°C is 5,000 to 100,000 mPa·s, and it is filled in a soft bag container for use. The liquid skin cleanser according to claim 1, wherein the viscosity at 30°C is 1000-6000 mPa·s, and it is filled in a bottle container for use. The liquid skin cleanser according to claim 1, wherein the mass ratio (A)/(C) of the component (A) to the component (C) is 2.57 to 35. The liquid skin cleanser according to claim 1, wherein the mass ratio (A)/(C) of the component (A) to the component (C) is 6 to 12. The liquid skin cleanser according to claim 1, which further contains an ester compound. The liquid skin cleanser according to claim 10, wherein the ester compound is a glycol difatty acid ester. A method for producing a liquid skin cleanser, which is the method for producing a liquid skin cleanser according to any one of claims 1 to 11, comprising the following steps: (step 1) adding the fatty acid and neutralizing agent of component (A) , component (D), and a part or all of component (F) are mixed according to the mode that the neutralization rate becomes 95~100%, and the step of obtaining the composition containing fatty acid salt; (step 2) the step 1 obtained The step of mixing the fatty acid salt-containing composition and the components (B), (C) and (E).