JP7329368B2 - Skin cleanser in foamer container - Google Patents

Description

The present invention relates to a skin cleanser in a foamer container.

Skin cleansing products in foam containers have been developed in recent years because they save the trouble of foaming. In such cleansing products, it is particularly required that the foam expelled from the container has elasticity and thickness, is easy to spread on the skin, and has good rinsability.

For example, Patent Document 1 discloses a liquid detergent composition containing N-acyl acidic amino acid or its salt, alkyl ether carboxylic acid or its salt, amphoteric surfactant and water in specific proportions and filled in a foamer container. It is described that the product is thick but spreads easily on the skin, has a long-lasting foam performance, and is easy to rinse.
Patent Document 2 discloses that an N-acyl taurine-type anionic surfactant, a carbobetaine-type or sulfobetaine-type amphoteric surfactant, a polyoxyethylene sorbitan fatty acid ester, and water are contained and filled in a foam discharge container. is described as providing a creamy and stable lather without clogging.
Patent Document 3 discloses that a skin cleanser composition containing an anionic surfactant, a polyol and water in a specific ratio and filled in a specific non-aerosol type container has a fine and elastic good foam quality. It is stated that
In Patent Document 4, an N-acylamino acid-based anionic surfactant, an amphoteric surfactant, a polyoxyethylene alkyl ether sulfate, a polyhydric alcohol and water are contained in specific proportions and filled in a former container. A liquid skin cleanser composition is described.

JP 2018-123342 A JP 2017-193625 A JP 2018-108987 A JP 2017-210416 A

However, with the liquid detergent composition of Patent Document 1, the rinsing speed is not sufficient, and although the foam quality is thick, the foam tends to accumulate at the discharge port of the foamer container due to the thick foam. There was a problem.
In Patent Document 2, the resulting foam has a low foam viscosity and is easy to spread, but the foam lacks elasticity and is loose.
In Patent Document 3, although elastic foam can be obtained, it spreads poorly on the skin and is difficult to spread on the body.
In Patent Document 4, the easiness of expanding the foam is insufficient, and the thickness of the foam is lacking.

As described above, none of the conventional skin cleansers contained in foamer containers are sufficiently satisfactory in terms of foam performance, rinsability, and the like.
In particular, elastic and thick foam tends to be difficult to spread on the skin due to its high density and hardness. Moreover, when the liquid detergent composition is discharged from the container, it tends to remain at the tip of the discharge port, and there is also a problem that the liquid pool is likely to occur.

The present inventors considered speeding up rinsing by reducing the amount of the anionic surfactant, but the foam density was low and the foam became loose, making the above-mentioned problem even more serious. Therefore, as a result of repeated studies, even if the amount of the anionic surfactant is small, an anionic surfactant containing a polyoxyethylene alkyl sulfate, a polyoxyethylene sorbitan fatty acid ester, a polyhydric alcohol, and an amphoteric surfactant are used in combination in a specific proportion to obtain a skin cleanser in a foamer container which solves the above problems.

The present invention provides the following components (A), (B), (C) and (D):
(A) polyoxyethylene sorbitan fatty acid ester,
(B) a polyhydric alcohol,
(C) (C1) anionic surfactant containing polyoxyethylene alkyl sulfate 1 to 10% by mass in terms of acid,
(D) It relates to a skin cleanser in a foamer container, which contains an amphoteric surfactant and has a mass ratio (C)/(B) of component (C) to component (B) of 0.5 or less.

The foam-contained skin cleanser of the present invention provides high-density, white foam with excellent foam elasticity while suppressing the content of the anionic surfactant. In addition, when the foam is spread on the skin, the foam sticks to the skin, and the foam slides on the surface of the foam, making it easy to spread. When rinsing, it can be washed off quickly without being slimy, and the rinsability is also good. Furthermore, when the liquid detergent composition is discharged from the foamer container, it is possible to reduce liquid puddles occurring at the tip of the discharge port.

The skin cleanser in a foamer container of the present invention is obtained by filling a foamer container with a liquid cleanser composition containing components (A) to (D).
The polyoxyethylene sorbitan fatty acid ester of component (A) used in the present invention is one that is used in ordinary detergents, has a fatty acid having an alkyl group of 12 to 22 carbon atoms, and has an ethylene oxide polymerization degree of 10 to 10. 300 is preferred.
Further, component (A) preferably has an HLB of 10 to 20, more preferably 13 to 20, from the viewpoint of low temperature stability and foaming.
Here, the HLB value is an index showing the Hydrophile-Lipophile Balance, and in the present specification, the value calculated by Griffin's formula below is used.

Examples of the polyoxyethylene sorbitan fatty acid ester of component (A) include polyoxyethylene sorbitan coconut oil fatty acid ester, polyoxyethylene sorbitan laurate, polyoxyethylene sorbitan myristate, polyoxyethylene sorbitan palmitate, poly Oxyethylene sorbitan isostearate, polyoxyethylene sorbitan stearate, polyoxyethylene sorbitan oleate, polyoxyethylene sorbitan behenate, polyoxyethylene sorbitan tristearate, polyoxyethylene triisostearate, etc. is mentioned.
Among these, the number of carbon atoms in the alkyl group of the fatty acid constituting the polyoxyethylene sorbitan fatty acid ester is preferably 12 to 18, more preferably 12 to 16, and even more preferably 12 to 14, from the viewpoint of low temperature stability. The degree of polymerization of ethylene oxide is preferably 5-300, more preferably 10-100. More preferably, it is 20-80.
Furthermore, as polyoxyethylene sorbitan fatty acid ester, polyoxyethylene mono fatty acid ester is preferable.

The polyoxyethylene sorbitan fatty acid ester of component (A) can be used alone or in combination of two or more. , preferably 0.2% by mass or more, more preferably 0.5% by mass or more, and even more preferably 1% by mass or more, in the liquid detergent composition, from the viewpoint of improving the skin feeling and the feeling that foam is increasing. Therefore, it is preferably 5% by mass or less, more preferably 4% by mass or less, and even more preferably 3% by mass or less. The content of component (A) is preferably 0.2 to 5% by mass, more preferably 0.5 to 4% by mass, even more preferably 1 to 3% by mass, in the liquid detergent composition.

As the polyhydric alcohol of the component (B) used in the present invention, those used in ordinary detergents, such as ethylene glycol, diethylene glycol, hexylene glycol, polyethylene glycol, propylene glycol, 1,3-propanediol, di Dihydric alcohols such as propylene glycol, polypropylene glycol, isoprene glycol, 1,3-butylene glycol; trihydric or higher alcohols such as glycerin, diglycerin, triglycerin, tetraglycerin, hexaglycerin, decaglycerin, trimethylpropanol; erythritol, sugars or sugar alcohols such as pentaerythritol, dipentaerythritol, glucose, mannose, galactose, sucrose, fructose, maltose, maltitol, xylitol, inositol, sorbitan and sorbitol;
Among these, propylene glycol, 1,3-propanediol, glycerin, sorbitol, 1,3-butylene glycol, and those having a mass average molecular weight of 20,000 or less are selected from the viewpoint of foam elasticity, feeling of increasing foam, and ease of foam spreading. Polyethylene glycol is preferred.

The polyhydric alcohol of component (B) can be used alone or in combination of two or more. 2% by mass or more is preferable, 10% by mass or more is more preferable, and 20% by mass or more is even more preferable. More preferred. The content of component (B) is preferably 2 to 40% by mass, more preferably 10 to 35% by mass, and even more preferably 20 to 30% by mass in the liquid detergent composition.

Polyhydric alcohol of component (B) preferably contains polyethylene glycol from the viewpoint of further improving foam resilience.
The content of polyethylene glycol in the liquid detergent composition is preferably 0.5% by mass or more, more preferably 1% by mass or more, from the viewpoint of improving foam elasticity. From a viewpoint, 10 mass % or less is preferable, 7 mass % or less is more preferable, and 4 mass % or less is further more preferable. The content of polyethylene glycol is preferably 0.5 to 10% by mass, more preferably 1 to 7% by mass, even more preferably 1 to 4% by mass, in the liquid detergent composition.

In the present invention, the mass ratio (A)/(B) of component (A) to component (B) is preferably 0.01 or more, more preferably 0.05 or more, from the viewpoint of foam elasticity and foam slippage. , is more preferably 0.1 or more, preferably 2 or less, more preferably 1.5 or less, and even more preferably 1 or less. Further, the mass ratio (A)/(B) of component (A) to component (B) is preferably 0.01 to 2, more preferably 0.05 to 1.5, and 0.1 to 1 is more preferred.

Component (C) is an anionic surfactant containing (C1) polyoxyethylene alkyl sulfate.
Component (C) may contain (C1) polyoxyethylene alkyl sulfate from the viewpoint of improving sufficient detergency and foamability even in a detergent composition containing a relatively small amount of anionic surfactant. is necessary.
(C1) Polyoxyethylene alkyl sulfate has the general formula (1):
^R1 _{( CH2CH2O} ) _{nSO3M1 (} ¹ )
(wherein R ¹ represents an aliphatic hydrocarbon group having 8 to 22 carbon atoms; M ¹ represents a cation selected from alkali metals, alkaline earth metals, ammonium, alkylammonium, alkanolammonium and glucammonium; n represents the average number of moles added, and is 0.5 to 20)
Those represented by are preferable.

In general formula (1), R ¹ is preferably an aliphatic hydrocarbon group having 8 to 18 carbon atoms, and an aliphatic hydrocarbon group having 8 to 16 carbon atoms, from the viewpoint of improving detergency, foam quality, and foam retention during washing. A group hydrocarbon group is preferred, and an aliphatic hydrocarbon group having 10 to 16 carbon atoms is more preferred. Furthermore, alkyl or alkenyl groups having 8 to 16 carbon atoms are preferred, alkyl or alkenyl groups having 10 to 16 carbon atoms are more preferred, and alkyl or alkenyl groups having 10 to 14 carbon atoms are even more preferred.
n is preferably 0.5 or more, preferably 12 or less, preferably 5 or less, more preferably 4 or less, and even more preferably 2 or less, from the viewpoints of detergency, foam quality, and foam retention during washing. A specific range of n is preferably from 0.5 to 12, more preferably from 0.5 to 5, even more preferably from 0.5 to 4, and even more preferably from 0.5 to 2.
From the viewpoint of improving low-temperature stability, M ¹ is preferably an alkali metal or ammonium, more preferably an alkali metal, and even more preferably sodium.

Specifically, as the component (C1), polyoxyethylene (1) sodium lauryl ether sulfate, polyoxyethylene (1) sodium myristyl ether sulfate, polyoxyethylene (2) sodium lauryl ether sulfate, polyoxyethylene (2 ) polyoxyethylene (1-2) alkyl ether sodium sulfate such as sodium myristyl ether sulfate; In the present specification, the numerical values in parentheses for these compounds mean the average number of added moles of ethylene oxide.
Further, as the component (C1), for example, Emal 125A [manufactured by Kao Corporation, polyoxyethylene (1) sodium lauryl ether sulfate], Emal 227 [manufactured by Kao Corporation, polyoxyethylene (2) sodium lauryl ether sulfate], etc. are commercially available. products can be used.

Component (C1) can be used alone or in combination of two or more. From the viewpoint of foaming and foam retention, the content of component (C1) is 0.5% by mass or more in terms of acid in the liquid detergent composition. is preferably 1% by mass or more, and from the viewpoint of improving rinsability, skin finish, and good foam discharge at low temperatures, it is preferably 8% by mass or less, more preferably 5% by mass or less. The content of component (C1) is preferably 0.5 to 8% by mass, more preferably 1 to 5% by mass, in terms of acid in the liquid detergent composition.

The anionic surfactant of component (C) preferably further contains (C2) an alkyl ether carboxylic acid or a salt thereof from the viewpoint of improving detergency and foamability and reducing irritation to the skin. .
(C2) Polyoxyalkylene alkyl ether carboxylic acid or salt thereof includes polyoxyethylene alkyl ether carboxylic acid represented by the following general formula (2) or salt thereof.
^R2O _{( CH2CH2O} ) _{mCH2COOM2 (} ² )
(In the formula, R ² represents an alkyl group or alkenyl group having 10 to 22 carbon atoms, m is the average number of added moles and represents a number of 0.5 to 10, M ² is a hydrogen atom, an alkali metal, an alkali indicates an earth metal, ammonium or organic ammonium)

In general formula (2), R ² is preferably an alkyl group having 12 to 16 carbon atoms, and an alkyl group having 12 to 14 carbon atoms, from the viewpoint of improving detergency and foamability and reducing irritation to the skin. groups are more preferred. From the above viewpoint, the average added mole number p of ethylene oxide is preferably 2-5.
Alkali metals such as sodium and ^potassium ; alkaline earth metals such as calcium and magnesium; ammonium; alkanolamine-derived ammonium such as monoethanolamine, diethanolamine and triethanolamine; Examples include ammonium derived from basic amino acids. Among these, sodium, potassium, triethanolamine, and arginine are preferable, and sodium and potassium are more preferable, from the above-mentioned viewpoint.

Specific examples of such polyoxyethylene alkyl ether carboxylic acid or salt thereof include polyoxyethylene lauryl ether carboxylic acid or salt thereof, polyoxyethylene myristyl ether carboxylic acid or salt thereof, and polyoxyethylene palmityl ether carboxylic acid. or salts thereof, 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, polyoxyethylene lauryl More preferably, it contains an ether carboxylic acid or a salt thereof.
Examples of these commercially available products include Kao Akipo RLM-45 (manufactured by Kao Corporation), Kao Akipo RLM 45CA (manufactured by Kao Corporation), and Kao Akipo LM 26C (manufactured by Kao Corporation).

Component (C2) can be used alone or in combination of two or more. From the viewpoint of detergency, the content of component (C2) is 0.1% by mass in terms of acid in the liquid detergent composition. 0.5 mass % or more is more preferable, and from the viewpoint of speeding up rinsing, 7 mass % or less is preferable, and 5 mass % or less is more preferable. The content of component (C2) is preferably 0.1 to 7% by mass, more preferably 0.5 to 5% by mass, in terms of acid in the liquid detergent composition.

As the component (C) anionic surfactants, in addition to components (C1) and (C2), anionic surfactants commonly used in skin cleansers, such as N-cocoylglycine salt, N- N-acylglycinates such as lauroyl-N-methylglycine; N-acylglutamates such as N-lauroylglutamate and N-myristoylglutamate; N-lauroyl-β-alanine and N-myristoyl-β-alanine N-acyl alanine salts such as salts; N-acyl aspartates such as N-lauroyl aspartate; N-acyl amino acid type anionic surfactants such as N-acyl serine salts such as N-lauroyl serine; Examples include N-acyl taurine anionic surfactants such as cocoyl methyl taurate, sulfonic acid anionic surfactants such as alkylbenzene sulfonates, and carboxylic acid anionic surfactants such as laurates. These salts include alkali metal salts such as sodium and potassium; alkanolamine salts such as monoethanolamine, diethanolamine and triethanolamine.
Among these, N-acylamino acid type anionic surfactants are preferred, and N-acylglutamates and N-acylglycinates are more preferred, from the viewpoints of foaming properties and good feeling during use.

The total content of component (C) including components (C1) and (C2) is 1% by mass or more and 2% by mass in terms of acid in the liquid detergent composition from the viewpoint of foam retention and foam resilience. % or more, more preferably 5% by mass or more, and from the viewpoint of improving rinsability and skin finish, it is 10% by mass or less, more preferably 9.5% by mass or less, and even more preferably 9% by mass or less. . In addition, the total content of component (C) including components (C1) and (C2) is 1 to 10% by mass, and 2 to 9.5% by mass, in terms of acid, in the liquid detergent composition. More preferably, 5 to 9% by mass is even more preferable.

In the present invention, the mass ratio (A)/(C) of component (A) to component (C) is preferably 0.01 or more, more preferably 0.05 or more, from the viewpoint of foam slippage and rinsing speed. It is preferably 0.1 or more, more preferably 2.5 or less, more preferably 2 or less, and even more preferably 1 or less from the viewpoint of foaming. Further, the mass ratio (A)/(C) of component (A) to component (C) is preferably 0.01 to 2.5, more preferably 0.05 to 2, and 0.1 to 1 is more preferred.

In the present invention, the mass ratio (C)/(B) of component (C) to component (B) is 0.5 or less, and 0.4 or less, from the viewpoint of rinsability, foam resilience, and foam thickness. It is preferably 0.1 or more, more preferably 0.2 or more, from the viewpoint of foot pressure during foam discharge and foam shape retention. Further, the mass ratio (C)/(B) of component (C) to component (B) is 0.5 or less, preferably 0.1 to 0.5, more preferably 0.2 to 0.4. .

The amphoteric surfactant of component (D) may be any one that is used in ordinary skin cleansers. Amine oxide surfactants, imidazolinium betaine surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, amidobetaine surfactants such as lauramidopropyl betaine, lauryl and sulfobetaine-type surfactants such as hydroxysulfobetaine.
Among these, amidobetaine surfactants and sulfobetaine surfactants are preferred from the viewpoint of improving foam resilience and foam thickness.

The amphoteric surfactant of component (D) can be used alone or in combination of two or more. Among them, 0.5% by mass or more is preferable, 1.5% by mass or more is more preferable, 3% by mass or more is even more preferable, and from the viewpoint of improving rinsability and skin finish, 35% by mass or less is preferable. % by mass or less is more preferable, and 10% by mass or less is even more preferable. The content of component (D) is preferably 0.5 to 35% by mass, more preferably 1.5 to 20% by mass, and even more preferably 3 to 10% by mass in the liquid detergent composition.

In the present invention, the mass ratio (C)/(D) of component (C) to component (D) is preferably 0.1 or more, more preferably 1 or more, from the viewpoint of foaming and foam retention during washing. The above is more preferable, 50 or less is preferable, 30 or less is more preferable, and 10 or less is even more preferable. The mass ratio (C)/(D) of component (C) to component (D) is preferably 0.1-50, more preferably 1-30, and even more preferably 3-10.

In the present invention, the liquid detergent composition further comprises (E) (E1) an alkyl glyceryl ether having 4 to 9 carbon atoms and (E2) an alkyl glyceryl ether having 10 to 22 carbon atoms. can contain a nonionic surfactant having a branched alkyl group, and can improve foam retention, foam elasticity, and foam thickness.
In (E1), the branched alkyl group having 4 to 9 carbon atoms includes (2-)ethylhexyl group and the like; in (E2), the branched alkyl group having 10 to 22 carbon atoms includes isodecyl group, (2 -) butyldodecyl group, (2-) heptylundecyl group, (2-) isoheptylundecyl group, (2-) isoheptylisoundecyl group, (2-) dodecylhexyl group, (2-) octyldodecyl group, isostearyl group, octyldodecyl group, decyltetradecyl group, and the like.
Among these, (2-)ethylhexyl group and isodecyl group are preferred. Also, the position of the branched chain in the alkyl group is not limited.

Specifically, (E1) includes glycerin mono-2-ethylhexyl ether and the like, and (E2) includes glycerin monoisodecyl ether, glycerin monoisostearyl ether and the like.
In addition, commercially available products such as glycerin mono-2-ethylhexyl ether (Penetol GE-EH, manufactured by Kao Corporation) and glycerin monoisodecyl ether (Penetol GE-ID, manufactured by Kao Corporation) can be used.

The mass ratio (E1)/(E2) of the components (E1) and (E2) is preferably 1 or more, more preferably 2 or more, from the viewpoint of improving the feeling that the foam is increasing without weakening the foam. From the viewpoint of elasticity, it is preferably 20 or less, more preferably 10 or less, and even more preferably 5 or less. The mass ratio (E1)/(E2) of components (E1) and (E2) is preferably 1-20, more preferably 1-10, and even more preferably 2-5.

The total content of component (E) including components (E1) and (E2) is preferably 0.1% by mass or more, preferably 0.2% by mass, in the liquid detergent composition from the viewpoint of foam thickness and smoothness. It is more preferably at least 0.3% by mass, more preferably at least 0.3% by mass. More preferably, 0.4% by mass or less is even more preferable. Further, the total content of component (E) including components (E1) and (E2) is preferably 0.1 to 0.6% by mass, more preferably 0.2 to 0.5% by mass, in the liquid detergent composition. % is more preferred, and 0.3 to 0.4% by mass is even more preferred.

The liquid detergent composition of the present invention is preferably in the form of a liquid in which the above components are dissolved in water. The content of water is the balance of the components (A) to (D) and other components to be contained as necessary, and from the viewpoint of low temperature stability, detergency and dischargeability, water is contained in the liquid detergent composition. , preferably 40% by mass or more, more preferably 45% by mass or more, more preferably 50% by mass or more, preferably 75% by mass or less, more preferably 70% by mass or less, and further 65% by mass or less preferable. The content of water in the liquid detergent composition is preferably 40 to 75% by mass, more preferably 45 to 70% by mass, and even more preferably 50 to 65% by mass.

The liquid detergent composition of the present invention can contain, in addition to the above components, components that are commonly used in detergent compositions, as long as they do not impair the effects of the present invention. For example, surfactants other than the above; lower alcohols such as ethanol and isopropyl alcohol; aromatic alcohols such as benzyl alcohol and benzyloxyethanol; cellosolves such as ethyl cellosolve and butyl cellosolve; Carbitols; moisturizing ingredients such as sugar (derivatives), amino acids (derivatives), animal and plant (protein) derivatives, and animal and plant extracts; silicone derivatives such as polyoxyalkylene-modified silicone; sodium sulfate, sodium carbonate, sodium hydrogen carbonate, potassium chloride , inorganic or organic salts such as sodium chloride and sodium citrate; pH adjusters such as acids and alkalis; anti-inflammatory agents such as glycyrrhetinic acid, glycyrrhizic acid and derivatives thereof; disinfectants such as isopropylmethylphenol; preservatives, metals Sequestering agents, antioxidants, UV absorbers, anionic polymers, cationic polymers, nonionic polymers, amphoteric polymers, fragrances, thickeners, vitamins, natural pigments, colorants such as tar pigments etc.

The pH of the liquid detergent composition of the present invention is preferably in the range of pH 4.5 to 6.9, more preferably pH 4.8 to 6.4, from the viewpoint of imparting sufficient mildness after washing. more preferred.
In the present invention, the pH is measured by filling a beaker with 100 mL of the liquid detergent composition (undiluted solution), adjusting the temperature to 30°C in a constant temperature bath at 30°C, and then immersing a pH measuring electrode in the beaker for 1 minute.

The liquid detergent in a foam container of the present invention has a liquid composition before being filled into a container, and has a viscosity at 30° C. of 1 to 1 from the viewpoint of forming fine and thick foam. It is preferably 20 mPa·s, more preferably 2 to 15 mPa·s, still more preferably 3 to 13 mPa·s, and even more preferably 5 to 11 mPa·s.
In the present invention, the viscosity was measured at 25° C. with a Brookfield viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.) using a No. rotor. 1. Rotate at a rotation speed of 60 r/min and measure the viscosity 60 seconds after the start of rotation.

The skin cleanser in a foamer container of the present invention is obtained by filling a foamer container, particularly a non-gas foamer container, with a liquid cleanser composition.
As the foamer container, any container can be used as long as it can be mixed with air and discharged as foam. Squeeze foamer containers for discharging are exemplified, and specific examples include foamer containers manufactured by Yoshino Kogyosho Co., Ltd., Yamato Seikan Co., Ltd., and Rieke. For example, the former containers described in JP-A-7-315463, JP-A-8-230961, JP-A-2005-193972, etc. can also be used.
Among them, from the viewpoint of convenience in an environment where a liquid detergent is used, a pump foamer container that discharges by pushing the pump head is preferable, and from the viewpoint of further improving foam quality, a porous membrane filter is installed in the discharge channel. is preferably provided. Such a porous membrane filter is preferably a 50 to 500 mesh filter, more preferably a 100 to 400 mesh filter, and even more preferably a 200 to 400 mesh filter, from the viewpoint of obtaining finer and better foam quality. , 200-305 mesh filters are even more preferred. It is preferable that one to three such porous filters are arranged in the discharge channel. Preferred materials for the mesh of such filters include nylon and polyester.
In addition, the mixing ratio of the liquid detergent composition and air in the pump foamer container is such that the density of the discharged foam (mass of the liquid detergent/volume of air) provides a good amount of foam and a foam quality that is easy to wash the skin. 0.03 to 0.14 g/cm ³ , more preferably 0.05 to 0.11 g/cm ³ from the viewpoint of obtaining high density.

The foam-packed liquid cleanser of the present invention is preferably used for skin cleansing, and more preferably used as hand soap, facial cleanser, and body soap. The cleansing composition of the present invention can be used to cleanse the skin by common skin cleansing methods. For example, it can be used by picking up the foam discharged from the foamer container, applying it directly to the skin without diluting it with water, washing it with foam, and then rinsing it with hot water such as a shower.
Moreover, as a washing method, there are a method of washing by hand, and a method of washing using a sponge, towel, scrubbing brush, etc. made of chemical fibers such as cotton or nylon. In order to reduce irritation to the skin, it can be washed directly by hand, or from the viewpoint of effectively and sufficiently demonstrating the foam performance and feeling of use of the present invention, it can be washed using a soft cotton towel or the like. good.

Examples 1-32, Comparative Examples 1-8
Liquid detergent compositions having the compositions shown in Tables 1 to 4 were prepared by mixing and dissolving each component in water, and adjusted to pH 6.2 with citric acid. The resulting liquid detergent composition was placed in a pump foamer container (a pump foamer container manufactured by Yoshino Kogyosho Co., Ltd. (porous membrane filters provided in the discharge path had two mesh sizes of 200 mesh and one mesh of 305 mesh)). to obtain a skin cleanser in a foamer container. In addition, unless otherwise specified, the numbers for the compounding amounts in the table indicate the compounding amounts of raw materials.
The resulting skin cleanser was evaluated for ease of foam spreading, foam elasticity (cushioning property), foam thickness, foam increasing sensation, and rinsing speed, and foam elasticity and foam diameter were measured. did. The results are also shown in Tables 1 to 4.
In the examples and comparative examples, each cleanser was used in a room at room temperature of 25° C. One push of each skin cleanser (discharge amount per push: about 1 mL) was discharged onto the palm of the dominant hand. Then, the non-dominant arm (elbow to wrist) was washed with the discharged foam using the palm of the dominant hand.

(Evaluation method)
(1) Ease of foam spreading:
Five expert panelists wet both arms with water, dispense foam (liquid volume: 1 mL) into the palm of one hand, and press it against the other forearm for a massage. Evaluation was made according to the following criteria. The results are shown as the average score of 5 people.
4 points: Foam is slippery.
3 points: The foam is slightly slippery.
2 points: Slightly non-slip foam.
1 point: Foam does not slip.

(2) Foam elasticity (cushioning properties):
Five expert panelists wet both arms with water, dispense foam into the palm of one hand (liquid volume: 1 mL), and press it against the forearm of the other hand. evaluated according to the standard. The results are shown as the average score of 5 people.
4 points: The foam has elasticity.
3 points: The foam has some elasticity.
2 points: Foam has little elasticity.
1 point: The foam has no elasticity.

(3) Foam thickness:
Five expert panelists wet both arms with water, dispense foam into the palm of one hand (liquid volume: 1 mL), and press the other forearm to massage the thickness (presence) of the foam. was evaluated according to the criteria of The results are shown as the average score of 5 people.
4 points: thick.
3 points: Slightly thick.
2 points: Slightly thin.
1 point: No thickness.

(4) Feeling of bubbles increasing:
Five expert panelists wet both arms with water, dispense foam (liquid volume: 1 mL) into the palm of one hand, and spread it on the other forearm. It was evaluated according to the following criteria. The results are shown as the average score of 5 people.
4 points: It is felt that bubbles increase.
3 points: It is felt that the foam is slightly increased.
2 points: It is felt that the foam does not increase a little.
1 point: It is felt that bubbles do not increase.

(5) Rinsing speed:
Five expert panelists rinsed the forearm, which had been evenly covered with foam, with the other hand by pouring water over it, and evaluated the speed at which the feeling of sliminess disappeared (rinsing speed) was evaluated according to the following criteria. The results are shown as the average score of 5 people.
4 points: Rinsing is fast.
3 points: Rinsing is slightly fast.
2 points: Rinsing is slightly slow.
1 point: Rinsing is slow.

(6) Foam elasticity measurement:
The normal force FN was measured when the foam was compressed at a compression speed of 5 mm/s immediately after filling (approximately 45 cm ³ ) the foam of the sample in a Petri dish of MCR302/Anton paar, PP50, @RTΦ62 mm.
A: Compressive stress [N] is 0.33 or more.
Good: Compressive stress [N] is 0.28 or more and 0.32 or less.
Δ: Compressive stress [N] is 0.23 or more and 0.37 or less.
x: Compressive stress [N] is 0.22 or less.

(7) Bubble diameter measurement:
Foam is discharged from the foam discharge container into a glass cylinder with a prism, and an image is taken one second after discharging the foam using a dynamic foam analyzer (DFA100-FSM, manufactured by KRUSS of Germany). I found the diameter.
A: The bubble diameter is 70.0 µm or less.
◯: The bubble diameter is 70.1 μm or more and 99.9 μm or less.
(triangle|delta): The bubble diameter is 100 micrometers or more and 109.9 or less.
x: The bubble diameter is 110 μm or more.

Test example 1
The skin cleansers in foaming containers of Examples 1, 5, 10 and Comparative Examples 1, 5, and 7 were evaluated for liquid pooling at the tip of the foam discharge container. Table 5 shows the results.

(Evaluation method)
Stagnant property at the tip of the foam discharge container:
The liquid detergent composition filled in the foam discharge container was stored in a constant temperature room with a temperature of 30° C. and a humidity of 20%, and was discharged once per day (1 mL), and the tip of the discharge port of the container was observed for two weeks. After two weeks, the state of the tip of the ejection port (and the ejected foam) was visually evaluated according to the following criteria.
⊚: No liquid pool is observed at the ejection port.
◯: A small amount of liquid pool is confirmed at the lower part of the ejection port.
Δ: Some liquid pools are observed around the ejection port, but there is no problem with the shape of the ejected foam.
x: A liquid pool is generated, the ejection port is clogged, or the shape of the ejected foam is deformed.

Test example 2
The skin cleansers in foam containers of Examples 1, 5 and 10 and Comparative Examples 1 and 7 were evaluated for adhesion of foam. Table 5 shows the results.

(Evaluation method)
Foam adhesion:
One push (1 mL) of sample foam was placed on MCR302/Anton paar, PP50, @RT, compressed to a gap of 1 mm, scraped off the foam protruding from the jig, and then peeled off at a speed of 5 mm/s. of normal force FN was measured. A larger value indicates higher adhesion.
A: Normal force FN is 0.8 or more.
Good: normal force FN is 0.6 or more and 0.79 or less.
Δ: Normal force FN is 0.41 or more and 0.59 or less.
x: Normal force FN is 0.4 or less.

Claims (6)

The following components (A), (B), (C) , (D) and (E) :
(A) polyoxyethylene sorbitan fatty acid ester,
(B) a polyhydric alcohol,
(C) (C1) anionic surfactant containing polyoxyethylene alkyl sulfate 1 to 10% by mass in terms of acid,
(D) an amphoteric surfactant ,
(E) a nonionic surfactant having a branched alkyl group with 4 to 22 carbon atoms
and the mass ratio (C)/(B) of component (C) to component (B) is 0.5 or less,
Component (E) contains (E1) an alkyl glyceryl ether having 4 to 9 carbon atoms and (E2) an alkyl glyceryl ether having 10 to 22 carbon atoms in a mass ratio of (E1)/(E2)=1 to 20. , a skin cleanser in a foamer container. The skin cleanser in a foamer container according to claim 1 , wherein the mass ratio (A)/(C) of component (A) to component (C) is 0.01 to 2.5. The skin cleanser in a foamer container according to claim 1 or 2 , wherein the content of component (A) is 0.2 to 5% by mass in the liquid cleanser composition. The skin cleanser in a foamer container according to any one of claims 1 to 3 , wherein the content of component (B) is 2 to 40% by mass in the liquid cleanser composition. The skin cleanser in a foam container according to any one of claims 1 to 4 , wherein the mass ratio (C)/(D) of component (C) to component (D) is 0.1-50. The skin cleanser in a foamer container according to any one of claims 1 to 5 , wherein component (C) further comprises (C2) an alkyl ether carboxylic acid or a salt thereof.