JPWO2019097950A1 - Liquid skin cleanser composition - Google Patents

Abstract

At least selected from (A) 2% by mass to 20% by mass of higher fatty acid salts containing laurate and myristate, (B) dimethyldiallylammonium chloride polymer, and dimethyldialylammonium chloride-acrylic acid copolymer. One cationic polymer, (C) a polyoxyethylene alkyl ether having an average addition molar number of 40 to 120, and at least one nonionic surfactant selected from the fatty acid monoethanolamide, and (D). ) Polyhydric alcohol, and the molar ratio of the structural unit derived from the dimethyldialylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 65 mol% or more, and the former container. Provided is a liquid skin cleaning agent composition which is filled with.

Description

The present invention relates to a liquid skin cleansing composition.

Conventionally, liquid skin cleansing composition such as hand soap and body soap has been required to be excellent in all of the properties related to foam, the feel at the time of washing, and the properties as a product. Examples of the properties related to foam include a large amount of foam, elasticity of foam, and good foam retention. Examples of the feeling at the time of washing include a lack of squeaky at the time of washing and a refreshing feeling at the end of rinsing. Properties as a product include, for example, low temperature stability that can prevent precipitation of components of the liquid skin cleansing composition when stored at low temperature. Further, recently, in addition to these, there is a strong demand for providing a liquid skin cleansing composition having a high moisturizing property that can impart a moist feeling to the skin after washing.
So far, liquid skin cleansing compositions containing a fatty acid salt and a fatty acid monoethanolamide have been proposed (see, for example, Patent Documents 1 to 3). However, the above-mentioned proposal has a problem that the moisturizing component is washed away at the time of rinsing and does not remain on the skin, so that the skin feels inferior after washing, and because it contains a large amount of fatty acid salt, it lacks stability at low temperature. ..

In addition, recently, a liquid skin cleansing composition packed in a former container that can be discharged with foam has been used. However, since some of the above proposals contain a thickener, they cannot be discharged from the former pump, and there is a problem that the discharge property is poor.
Therefore, it is desired to provide a skin cleansing composition which is excellent in all of the properties related to foam, the feel at the time of washing, and the property as a product even when filled in a former container, and has good ejection properties.

JP-A-2002-317195 Japanese Unexamined Patent Publication No. 2011-84484 JP 2015-182967

An object of the present invention is to solve the above-mentioned problems in the past and to achieve the following object. That is, the present invention has good foam volume, foam elasticity, foam retention, stability at low temperature, and discharge property, but does not squeak during cleaning and at the end of rinsing. An object of the present invention is to provide a liquid skin cleansing composition having an excellent refreshing feeling and a moist feeling of the skin after towel drying.

As a result of diligent studies by the present inventor in order to solve the above problems, (A) higher fatty acid salt, (B) cationic polymer, (C) nonionic surfactant, and (D) polyhydric alcohol have been obtained. The liquid skin cleansing composition contained in the composition has a large amount of foam, elasticity of foam, good foam retention, stability at low temperature, discharge property, and no squeak during washing due to the synergistic effect of each of these components. It was found that the skin feels refreshed at the end of rinsing and the skin feels moist after towel drying.

The present invention is based on the above-mentioned knowledge by the present inventor, and the means for solving the above-mentioned problems are as follows. That is,
<1> (A) 2% by mass to 20% by mass of higher fatty acid salts containing laurate and myristate,
(B) At least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer.
(C) Polyoxyethylene alkyl ether having an average addition mole number of ethylene oxide of 40 to 120, at least one nonionic surfactant selected from fatty acid monoethanolamide, and (D) polyhydric alcohol. And
The molar ratio of the structural unit derived from the dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 65 mol% or more.
A liquid skin cleansing composition characterized by being filled in a former container.
<2> The liquid skin cleansing composition according to <1>, wherein the mass ratio (A / C) of the (A) higher fatty acid salt to the (C) nonionic surfactant is 2 to 40. ..
<3> The liquid skin cleansing composition according to any one of <1> to <2>, which further contains (E) amidopropyl betaine.
<4> The liquid skin cleansing composition according to any one of <1> to <3>, wherein the pH is 9.5 to 11.0.

According to the present invention, the above-mentioned problems in the prior art can be solved and the above-mentioned object can be achieved, and a large amount of foam, elasticity of foam, good foam retention, stability at low temperature, and ejection property are obtained. It is possible to provide a liquid skin cleansing composition which is good but has excellent non-squeaky feeling at the time of washing, a refreshing feeling at the end of rinsing, and a moist feeling of the skin after towel drying.

(Liquid skin cleansing composition)
The liquid skin cleaning composition of the present invention comprises (A) a higher fatty acid salt, (B) a cationic polymer, (C) a nonionic surfactant, and (D) a polyhydric alcohol, and (E). It preferably contains amidopropyl betaine, and further contains other components as needed.

<(A) Higher fatty acid salt>
The higher fatty acid salt (A) is contained in order to improve the amount of foam, the elasticity of foam, and the goodness of foam.
The higher fatty acid salt of the component (A) contains laurate and myristate, and further contains other higher fatty acid salts such as stearate and palmitate, if necessary.

Examples of the counterion of the higher fatty acid of the higher fatty acid salt of the component (A) include alkali metal ions, ammonium ions, alkanolamines, and basic amino acids.
Examples of the alkali metal ion include sodium ion and potassium ion.
Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol and the like.
Examples of the basic amino acid include lysine and arginine.
The higher fatty acid salt of the component (A) is not particularly limited and may be blended as a higher fatty acid salt, but the higher fatty acid and salts such as potassium hydroxide, triethanolamine and monoethanolamine , May be separately added to the compounding tank and neutralized to obtain a higher fatty acid salt.

As the component (A), a synthetic product may be used, or a commercially available product may be used. Examples of the commercially available product include potassium laurate such as potassium laurate LK-120 (manufactured by Nikko Chemicals Co., Ltd.) and NAA-122 (manufactured by Nikko Chemicals Co., Ltd.), and potassium myristate MK-140 (Nikko Chemicals Co., Ltd.). Examples thereof include potassium myristate such as NAA-142 (manufactured by Nikon Corporation) and potassium palmitate such as non-sar PK-1 (manufactured by Nikon Corporation). These may be used alone or in combination of two or more.

The content of the higher fatty acid salt of the component (A) is the liquid skin cleaning agent composition from the viewpoint of a large amount of foam, elasticity of foam, good foam retention, and stability at low temperature. It is 2% by mass to 20% by mass, preferably 5% by mass to 15% by mass, based on the total amount. If the content is less than 2% by mass, the amount of foam, the elasticity of foam, and the elasticity of foam may be insufficient, and if it exceeds 20% by mass, it is stable at a low temperature. Insufficient sex may occur.

The content of the lauric acid salt is preferably 1% by mass to 18% by mass, more preferably 5% by mass to 16% by mass, based on the total amount of the liquid skin cleansing composition. The content of the myristic acid salt is preferably 0.5% by mass to 10% by mass, more preferably 1% by mass to 6% by mass, based on the total amount of the liquid skin cleansing composition. When the contents of the laurate salt and the myristic acid salt are within the above-mentioned preferable numerical values, the amount of foam, the elasticity of the foam, and the goodness of the foam are good.

The other higher fatty acid salt is not particularly limited as long as it does not inhibit the effect of the present invention, and can be appropriately selected depending on the intended purpose, but palmitate is preferable.
The content of the palmitic acid salt is not particularly limited and may be appropriately selected depending on the intended purpose, but in terms of dischargeability, it is preferably 2% by mass or less based on the total amount of the higher fatty acid salt. More preferably, it is 1% by mass or less. The lower limit of the stearate content is preferably 0% by mass.

<(B) Cationic polymer>
The cationic polymer (B) is contained in order to improve the moist feeling of the skin after towel drying.
The (B) cationic polymer is at least one selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and the said dimethyldialylammonium chloride-acrylic acid copolymer. The molar ratio of the structural unit derived from dimethyldiallyl ammonium chloride is 65 mol% or more.

The dimethyldiallylammonium chloride-acrylic acid copolymer among the components (B) is represented by the following general formula (1).
However, in the general formula (1), n and m indicate the molar ratio of each structural unit to all structural units, n + m = 100, and m is 65 or more.

The molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer among the components (B) is 65 mol% or more from the viewpoint of the moist feeling of the skin after towel drying. Yes, 95 mol% or more is preferable. If the molar ratio is less than 65 mol%, the moist feeling of the skin after towel drying may be insufficient.

The molar ratio of structural units in the dimethyldiallyl ammonium chloride-acrylic acid copolymer among the components (B) can be determined by measuring under the following measurement conditions by nuclear magnetic resonance (NMR).
[Measurement condition]
Solvent: heavy water (D ₂ O)
Measuring instrument: JNM-LA300 (300MHz, manufactured by JEOL Ltd.)

The weight average molecular weight of the cationic polymer of the component (B) is not particularly limited and may be appropriately selected depending on the intended purpose. However, from the viewpoint of the moist feeling of the skin after towel drying, 10,000 to 1 Million is preferable, and 15,000 to 450,000 is more preferable.
The weight average molecular weight of the cationic polymer of the component (B) is, for example, the SEC-MALLS-RI system (measurement conditions: column: TSKgel α series α-M column 30 cm manufactured by Tosoh Corporation, solvent: sodium nitrate 0.3 M aqueous solution). Can be measured with.

As the cationic polymer of the component (B), an appropriately synthesized polymer may be used, or a commercially available product may be used. Examples of the commercially available product include the following.
Marcourt 100 (component name: dimethyldialylammonium chloride polymer, manufactured by Nippon Lubrizol Co., Ltd., viscosity at 25 ° C. with solid content of 39% by mass to 44% by mass: 8,000 mPa · s to 12,000 mPa · s, weight average Molecular weight: 150,000). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 6 rotations / minute using the rotor of 3.

Marcourt 106 (component name: dimethyldialylammonium chloride polymer, manufactured by Nippon Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 30% by mass to 36% by mass: 20 mPa · s to 65 mPa · s, weight average molecular weight: 15, 000). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 60 rotations / minute using one rotor.

Marcourt 280 (ingredient name: dimethyldialyl ammonium chloride-acrylic acid copolymer, manufactured by Nippon Lubrizol Co., Ltd., viscosity at 25 ° C. with solid content of 39% by mass to 43% by mass: 3,000 mPa · s ~ 6,000 mPa · s, weight average molecular weight: 450,000, n: m = 35: 65 (molar ratio) in the general formula (1), molar ratio of structural units derived from dimethyldialyl ammonium chloride is 65 mol%). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 60 rotations / minute using the rotor of 4.

Marcourt 295 (Component name: Dimethyldiallyl ammonium chloride-acrylic acid copolymer, manufactured by Nippon Lubrizol Co., Ltd., viscosity at 25 ° C. with a solid content of 35% by mass to 40% by mass: 3,500 mPa · s ~ 9,000 mPa ·. s, weight average molecular weight: 190,000, n: m = 5: 95 (molar ratio) in the general formula (1), molar ratio of structural units derived from dimethyldialyl ammonium chloride is 95 mol%). The viscosity was determined by using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. It can be measured under the condition of 30 rpm using the rotor of 4.

These may be used alone or in combination of two or more. Among these, Marurt 100 and Marcoat 295 are preferable as the cationic polymer of the component (B) from the viewpoint of moisturizing the skin after towel drying.

The content of the cationic polymer of the component (B) is such that the liquid skin cleansing composition comprises a large amount of foam, no squeak during washing, and a moist feeling of the skin after towel drying. With respect to the total amount, 0.2% by mass to 3% by mass is preferable, and 0.3% by mass to 2% by mass is more preferable. When the content is 0.2% by mass or more, the moist feeling of the skin after towel drying is good, and when it is 3% by mass or less, the amount of foam is large and there is no squeak during washing. Is good.

<(C) Nonion Surfactant>
The nonionic surfactant (C) is contained in order to improve the elasticity of the foam and the goodness of the foam.
The nonionic surfactant (C) is at least one selected from polyoxyethylene alkyl ethers having an average addition mole number of ethylene oxide of 40 to 120, and fatty acid monoethanolamide.

<< Polyoxyethylene alkyl ether >>
The average number of moles of ethylene oxide (EO) added to the polyoxyethylene alkyl ether (hereinafter, also referred to as "POE alkyl ether") (average number of moles of EO added) is the elasticity of the foam and the goodness of the foam. Therefore, it is 40 to 120, preferably 50 to 100, and more preferably 70 to 100. If the average number of moles of EO added is less than 40 moles and exceeds 120 moles, the elasticity of the foam and the stickiness of the foam may be insufficient.
The polyoxyethylene alkyl ether as the component (C) preferably has an alkyl group having 10 to 22 carbon atoms, more preferably 12 to 18 carbon atoms.

As the polyoxyethylene alkyl ether, one synthesized as appropriate may be used, or a commercially available product may be used. Examples of the commercially available products include Emarex 550 (POE (50) oleyl ether), Emarex 750 (POE (50) lauryl ether) (all manufactured by Nippon Emulsion Co., Ltd.), Nonion K-2100W (POE (100)). Lauryl ether, manufactured by Nichiyu Co., Ltd.), Blaunon SR-750 (POE (50) stearyl ether, manufactured by Aoki Yushi Kogyo Co., Ltd.) and the like. The numerical value in parentheses after POE represents the average number of moles of ethylene oxide added.

<< Fatty Acid Monoethanolamide >>
The number of carbon atoms of the fatty acid in the fatty acid monoethanolamide is preferably 8 to 18.

As the fatty acid monoethanolamide of the component (C), those synthesized as appropriate may be used, or commercially available products may be used. Examples of the commercially available product include amizole CME (coconut oil fatty acid monoethanolamide) and amizole SME (stearic acid monoethanolamide) (all manufactured by Kawaken Fine Chemicals Co., Ltd.).

These POE alkyl ethers and fatty acid monoethanolamides may be used alone or in combination of two or more.

The content of the nonionic surfactant of the component (C) is 0.1% by mass with respect to the total amount of the liquid skin cleaning agent composition from the viewpoint of foam elasticity, foam retention, and ejection property. % To 5% by mass is preferable, and 0.2% by mass to 4% by mass is more preferable. When the content is 0.1% by mass or more, the elasticity of the foam and the goodness of the foam are good, and when it is 5% by mass or less, the ejection property is good.

[Mass ratio (A / C)]
The mass ratio (A / C) of the higher fatty acid salt of the component (A) to the nonionic surfactant of the component (C) is determined from the viewpoint of a refreshing feeling at the end of rinsing and no squeaking at the time of washing. 2 to 40 are preferable, and 10 to 30 are more preferable. If the mass ratio (A / C) is less than 2, the refreshing feeling at the end of rinsing may be insufficient, and if it exceeds 40, the squeaky feeling at the time of washing may be insufficient.

<(D) Multivalent alcohol>
The (D) polyhydric alcohol is contained in order to improve the discharge property.
As the polyhydric alcohol of the component (D), propylene glycol, dipropylene glycol, ethylhexyl glycerin, glycerin, and 1,3-butylene glycol are preferable, and propylene glycol, dipropylene glycol, and glycerin are preferable from the viewpoint of dischargeability. More preferred. These may be used alone or in combination of two or more.

As the polyhydric alcohol of the component (D), an appropriately synthesized one may be used, or a commercially available product may be used. Examples of the commercially available products include cosmetic propylene glycol (propylene glycol, manufactured by Adeka Corporation), cosmetic glycerin 85% (glycerin, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.), and 1,3-butylene glycol-P (KH Neochem Co., Ltd.). (Made by company) and so on.

The content of the polyhydric alcohol of the component (D) is 1% by mass with respect to the total amount of the liquid skin cleansing composition from the viewpoint of the large amount of foam, good foam retention, and dischargeability. -20% by mass is preferable, and 5% by mass to 15% by mass is more preferable. When the content is 1% by mass or more, the discharge property is good, and when the content is 20% by mass or less, the amount of foam and the goodness of foam retention are good.

<(E) Amidopropyl Betaine>
The amide propyl betaine of the component (E) is contained to improve transparency.
Examples of the amide propyl betaine of the component (E) include amide propyl betaine laurate, amide propyl betaine of coconut oil fatty acid, and amide propyl betaine myristate. These may be used alone or in combination of two or more. Among these, lauric acid amide propyl betaine and coconut oil fatty acid amide propyl betaine are preferable from the viewpoint of transparency.

As the component (E), a synthetic product may be used, or a commercially available product may be used. Examples of the commercially available product include Energycol L-30B (amide propyl betaine laurate, manufactured by Lion Specialty Chemicals Co., Ltd.), Nikkor AM-3130N (coconut oil fatty acid amide propyl betaine, manufactured by Nikko Chemicals Co., Ltd.) and the like.

The content of the amide propyl betaine of the component (E) is preferably 1% by mass to 15% by mass, based on the total amount of the liquid skin cleansing composition, from the viewpoint of foaminess and transparency. More preferably, 5% by mass to 10% by mass. When the content is 1% by mass or more, the transparency is good, and when it is 15% by mass or less, the foaminess is good.

<Other ingredients>
In addition to the above components (A) to (E), the liquid skin cleansing composition of the present invention may contain other components as necessary without impairing the effects of the present invention. it can.
Examples of the other components include purified water, water-soluble polymers other than the cationic polymer of the component (B), viscosity modifiers, oils, alcohols such as lower alcohols and higher alcohols, lanolin derivatives, protein derivatives, and acrylics. Resin dispersions, chemicals such as vitamins, bactericides, preservatives, pH adjusters, antioxidants, metal sequestering agents, UV absorbers, animal and plant extracts or derivatives thereof, pigments, fragrances, pigments, inorganic powders, clay minerals , Water-insoluble polymer powders such as nylon and polyethylene. These may be used alone or in combination of two or more.

<Former container>
The liquid skin cleansing composition of the present invention is filled in a former container.
Examples of the former container include a non-gas type foam discharge container. The non-gas type foam discharge container is not particularly limited as long as the liquid skin cleansing composition and air can be mixed and discharged in a foamed state, and can be appropriately selected depending on the intended purpose, for example. Examples include a squeeze former container that can discharge bubbles by manually pressing the bottle body, and a pump former container that can discharge bubbles by pushing down the nozzle. As such a former container, for example, a product manufactured by Daiwa Seikan Co., Ltd., a product manufactured by Yoshino Kogyosho Co., Ltd., or the like can be used.
The non-gas type foam discharge container usually has a porous membrane body (preferably a plastic material such as nylon, polyester, or polyolefin) for forming foam, and the skin cleaning agent composition is the porous membrane. Bubbles are formed by passing through the body. The mesh of the porous membrane is not particularly limited and may be appropriately selected depending on the intended purpose. For example, 100 mesh or more is preferable, 100 mesh to 400 mesh is more preferable, and 200 mesh to 350 mesh is preferable. More preferred.
The number of the porous membranes is not particularly limited and may be appropriately selected depending on the intended purpose, but 2 to 4 is preferable from the viewpoint of improving the foam performance. More specifically, the former containers described in JP-A-7-315463, JP-A-8-230961 and JP-A-2005-193972 can be preferably used.

<Manufacturing method>
The method for producing the liquid skin cleansing composition of the present invention is not particularly limited and may be appropriately selected depending on the intended purpose. The components (A) to (E) and, if necessary, the other components. , And the purified water (the remaining amount is blended so that the entire liquid skin cleansing composition is 100% by mass) can be obtained by mixing.
Specifically, it can be manufactured as follows. The higher fatty acid salt of the component (A) and the polyhydric alcohol of the component (D) are dissolved in purified water heated to 70 ° C. to 80 ° C., cooled to 40 ° C. or lower, and then (B). It can be produced by adding the cationic polymer of the component, the nonionic surfactant of the component (C), and if necessary, the amide propyl betaine of the component (E).
The liquid skin cleansing composition may be prepared using an apparatus. The device is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a stirring device having a shearing force and having a stirring blade capable of mixing the whole.
The stirring blade is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a propeller, a turbine and a dispenser.

−pH−
The pH of the liquid skin cleansing composition at 25 ° C. is preferably 9.5 to 11.0, preferably 9.8 to 11.0, from the viewpoints of foam elasticity, foam retention, ejection property, and transparency. 6 is more preferable. When the pH is 9.5 or more, the transparency and the ejection property are good, and when the pH is 11.0 or less, the elasticity of the foam and the goodness of the foam are good.
The pH can be measured, for example, using a pH meter (HM-30R type, manufactured by TOA DKK Corporation).

-Viscosity-
The viscosity of the liquid skin cleansing composition at 25 ° C. is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 4 mPa · s to 50 mPa · s, preferably 8 mPa · s to 20 mPa · s. More preferred. When the viscosity is within the above preferable range, the elasticity of the foam, the goodness of the foam, and the discharge property are good.
The viscosity was determined by using, for example, a BM type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at a sample temperature of 25 ° C., a sample temperature of 25 ° C., a rotation speed of 60 rpm, and No. It can be measured by measuring the viscosity after 1 minute with the rotor of 1.

-Use-
The liquid skin cleansing composition of the present invention has a large amount of foam, elasticity of foam, good foam retention, stability at low temperature, and good ejection property, but does not cause squeak during cleaning. It is used for, for example, cleansing pigments, hand soaps, body soaps, cleansing foams, makeup removers, etc., and is particularly suitable for body soaps, because it has an excellent refreshing feeling at the end of rinsing and a moist feeling of the skin after towel drying. ..

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples, but the present invention is not limited to the following Examples. The contents of each component described in Examples and Comparative Examples are all values converted to pure content.

(Examples 1-33 and Comparative Examples 1-12)
Liquid skin cleansing compositions having the compositions and contents shown in Tables 1 to 8 below were prepared by a conventional method. Specifically, it was prepared by the following method.
The purified water is heated to 70 ° C. to 80 ° C. to dissolve the higher fatty acid salt of the component (A) or the polyhydric alcohol of the comparative component (A) and the component (D), and cooled to 40 ° C. or lower. The total amount of the liquid skin cleansing composition finally obtained by adding the cationic polymer of the component (B) or the comparative component (B) and the nonionic surfactant of the component (C) or the comparative component (C). A liquid skin cleansing composition in an amount of 95% by mass was prepared. After that, if the pH is less than the predetermined pH, potassium hydroxide, which is a common component, is added, the pH is adjusted to the predetermined pH, and purified water is added so that the total amount becomes 100% by mass to obtain the target liquid skin. A cleaning composition was obtained. A propeller was used as the stirring blade, and a three-one motor (HEIDON BL1200, manufactured by Shinto Kagaku Co., Ltd.) was used for stirring. The pH was measured at 25 ° C. using a pH meter (HM-30R type, manufactured by TOA DKK Corporation).
The liquid skin cleansing compositions of Examples 1 to 33 and Comparative Examples 1 to 12 obtained were containers with a former pump dispenser [discharge amount 3 mL, manufactured by Yoshino Kogyosho Co., Ltd., in the table, the container " 1 ”] was filled, and each liquid skin cleansing composition of Comparative Example 13 was placed in a container with a pump dispenser [discharge amount 3 mL, manufactured by Yoshino Kogyosho Co., Ltd., indicated as container“ 2 ”in the table]. Filled.

Next, regarding the obtained liquid skin cleansing composition to be written, as follows, "a large amount of foam", "elasticity of foam", "goodness of foam", and "no squeak during cleaning". , "Refreshing feeling at the end of rinsing", "Moist feeling of skin after towel drying", "Stability at low temperature", and "Dischargeability" were evaluated. The results are also shown in Tables 1 to 8 below.

<Large amount of foam, elasticity of foam>
A large amount of foam and elasticity of foam when 10 expert evaluators took 1 push (about 3 g) of the liquid skin cleansing composition of Examples 1 to 33 and Comparative Examples 1 to 12 on the palm. The sex was observed and evaluated based on the following evaluation criteria. The results were determined based on the following criteria by obtaining the average evaluation points of the 10 expert evaluators.
-Evaluation criteria for "a large amount of bubbles"-
4 points: The amount of foam when 1 push is taken in the hand is the amount that overflows from the palm 3 points: The amount of foam when 1 push is taken in the hand is the same amount as the area of the palm 2 points: The amount of foam when 1 push is taken in the hand is 80% to 50% of the area of the palm 1 point: The amount of foam when 1 push is taken in the hand is the area of the palm Is less than 50% of the amount-Criteria for "large amount of bubbles"-
⊚: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points Δ: 2.0 points or more and less than 3.0 points ×: less than 2.0 points

-Evaluation criteria for "foam elasticity"-
4 points: Feel the thickness but have horns of 1 cm or more 3 points: Feel the thickness but feel the horns of 0.1 cm to 0.9 cm 2 points: Feel the thickness but the horns do not stand 1 point: Do not feel the thickness- "Foam Criteria for "elasticity"-
⊚: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points Δ: 2.0 points or more and less than 3.0 points ×: less than 2.0 points

<Good foaminess>
When 10 expert evaluators hand-washed the liquid skin cleansing composition of Examples 1 to 33 and Comparative Examples 1 to 12 with a total of 6 pushes (about 18 g) of foam, the goodness of foam was observed. , Evaluated based on the following evaluation criteria. The results were determined based on the following criteria by obtaining the average evaluation points of the 10 expert evaluators.

-Evaluation criteria for "good foaminess"-
5 points: Most of the foam left on the body at the beginning of washing when the body is washed 4 points: About 80% to 60% of the foam left on the body at the beginning of washing 3 points: When you finish washing your body, about half of the foam left on your body at the beginning of washing 2 points: When you finish washing your body, about 40% to 20% of the foam you put on your body at the beginning of washing Remaining 1 point: When you finish washing your body, there is almost no foam left on your body at the beginning of washing-Criteria for "good foam retention"-
◎ ◎: 4.0 points or more ◎: 3.5 points or more and less than 4.0 points ○: 3.0 points or more and less than 3.5 points △: 2.0 points or more and less than 3.0 points ×: 2.0 points Less than

<No squeaking during cleaning>
When 10 expert evaluators took 1 push (about 3 g) of the liquid skin cleansing composition of Examples 1 to 33 and Comparative Examples 1 to 12 and rubbed the inner part of the forearm four times, the squeak during washing The lack was evaluated based on the following evaluation criteria. The results were determined based on the following criteria by obtaining the average evaluation points of the 10 expert evaluators.

-Evaluation criteria for "no squeaks during cleaning"-
4 points: I don't feel any squeak
3 points: Slightly squeaky 2 points: Very squeaky 1 point: Very squeaky
-Criteria for "no squeaking during cleaning"-
⊚: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points Δ: 2.0 points or more and less than 3.0 points ×: less than 2.0 points

<Refreshing feeling at the end of rinsing>
Ten expert evaluators took one push (about 3 g) of the liquid skin cleansing composition of Examples 1 to 33 and Comparative Examples 1 to 12, rubbed the inner part of the forearm four times, and then with warm water at 40 ° C. Immediately after rinsing the liquid skin cleansing composition, "a refreshing feeling at the end of rinsing" was evaluated based on the following evaluation criteria. The results were determined based on the following criteria by obtaining the average evaluation points of the 10 expert evaluators.

-Evaluation criteria for "refreshing feeling at the end of rinsing"-
4 points: I feel a refreshing feeling 3 points: I feel a refreshing feeling 2 points: I feel a slightly refreshing feeling 1 point: I do not feel a refreshing feeling
-Criteria for "refreshing feeling at the end of rinsing"-
⊚: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points Δ: 2.0 points or more and less than 3.0 points ×: less than 2.0 points

<Moist feeling of skin after towel drying>
Ten expert evaluators hand-washed the liquid skin cleansing composition of Examples 1 to 33 and Comparative Examples 1 to 12 with a total of 6 pushes (about 18 g) of foam, and then washed the liquid skin with warm water at 40 ° C. The cleaning composition was rinsed off and the water droplets were wiped off with a towel. At this time, the "moist feeling of the skin after towel drying" was evaluated based on the following evaluation criteria. The results were determined based on the following criteria by obtaining the average evaluation points of the 10 expert evaluators.

-Evaluation criteria for "moisturized skin after towel drying"-
5 points: Feels a strong moist feeling 4 points: Feels a moist feeling 3 points: Feels a little moist feeling 2 points: Does not feel a lot of moist feeling 1 point: Feels a moist feeling at all- "Moisturized skin after towel drying" Criteria for "feeling"-
⊚: 4.0 points or more ○: 3.0 points or more and less than 4.0 points Δ: 2.0 points or more and less than 3.0 points ×: less than 2.0 points

<Stability at low temperature>
The liquid skin cleansing compositions of Examples 1 to 33 and Comparative Examples 1 to 12 were placed in a cylindrical transparent glass bottle having a diameter of 4 cm and a height of 7.5 cm, and placed in a constant temperature bath at -5 ° C and -2 ° C for 2 weeks. saved. At this time, 10 expert evaluators visually observed the state of formation of the precipitate (appearance of the liquid skin cleansing composition) and evaluated it based on the following evaluation criteria. The results were determined based on the following criteria by obtaining the average evaluation points of the 10 expert evaluators.

-Evaluation criteria for "stability at low temperature"-
5 points: No precipitation of crystals or solids within 2 weeks at both -5 ° C and -2 ° C 4 points: No precipitation of crystals or solids within 2 weeks at -2 ° C, within 2 weeks at -5 ° C Almost no precipitation of crystals or solids is observed (no problem in terms of commercial value)
3 points: Almost no precipitation of crystals or solids was observed in 2 weeks at both -5 ° C and -2 ° C (no problem in terms of commercial value).
2 points: A small amount of crystals or solids are deposited within 2 weeks at both -5 ° C and -2 ° C. 1 point: A large amount of crystals or solids are deposited within 2 weeks at both -5 ° C and -2 ° C.-" Criteria for "stability at low temperature"-
⊚: 4.0 points or more ○: 3.0 points or more and less than 4.0 points Δ: 2.0 points or more and less than 3.0 points ×: less than 2.0 points

<Dischargeability>
Ten expert evaluators evaluated the discharge property of the liquid skin cleansing composition of Examples 1 to 33 and Comparative Examples 1 to 12 when one push (about 3 g) was performed based on the following evaluation criteria. The results were determined based on the following criteria by obtaining the average evaluation points of the 10 expert evaluators.

-Evaluation criteria for "dischargeability"-
5 points: Pump is very easy to push 4 points: Pump is easy to push 3 points: Pump is easy to push 2 points: Pump is hard to push 1 point: Pump is very hard to push-Criteria for "discharge"
⊚: 5.0 points ○: 4.0 points or more and less than 5.0 points Δ: 3.0 points or more and less than 4.0 points ×: less than 3.0 points

In addition, "POE" in Tables 1-11 is an abbreviation for "polyoxyethylene".
The numbers of the components (A) to (E) and the comparative components (A) to (C) in Tables 1 to 10 represent "mass%".

In addition, (B) dimethyldiallyl ammonium chloride-acrylic acid (30:70) copolymer used in the comparative component and acrylic acid-dimethyldiallyl ammonium chloride-acrylamide (34:31:35) copolymer are the following general. It is a polymer compound having a structure represented by the formula (2).
However, in the general formula (2), n, m, and z represent a molar ratio, and in the dimethyldialylammonium chloride / acrylic acid (30:70) copolymer, the n is 0, the m is 30, and the above. z is 70. Further, in the acrylic acid-dimethyldiallylammonium chloride-acrylamide (34:31:35) copolymer, the n is 34, the m is 31, and the z is 35.

(Examples 34 to 43)
The purified water is heated to 70 ° C. to 80 ° C. to dissolve the higher fatty acid salt of the component (A) and the polyhydric alcohol of the component (D), cooled to 40 ° C. or lower, and then the cation of the component (B). A liquid amount that is 95% by mass of the total amount of the liquid skin cleaning composition finally obtained by adding the sex polymer, the nonionic surfactant of the component (C), and the amide propyl betaine of the component (E). A skin cleansing composition was prepared. After that, if the pH is less than the predetermined pH, potassium hydroxide, which is a common component, is added, the pH is adjusted to the predetermined pH, and purified water is added so that the total amount becomes 100% by mass to obtain the target liquid skin. A cleaning composition was obtained. A propeller was used as the stirring blade, and a three-one motor (HEIDON BL1200, manufactured by Shinto Kagaku Co., Ltd.) was used for stirring. The pH was measured at 25 ° C. using a pH meter (HM-30R type, manufactured by TOA DKK Corporation).
Further, each of the obtained liquid skin cleansing composition of Examples 34 to 43 was filled in a container with a former pump dispenser [discharge amount 3 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Yoshino Kogyosho Co., Ltd.]. ..

Next, in the same manner as in Example 1, "a large amount of foam", "elasticity of foam", "good foaminess", "no squeakyness at the time of washing", and "a refreshing feeling at the end of rinsing". , "Moist feeling of skin after towel drying", "Stability at low temperature", and "Dischargeability" were evaluated. "Transparency" was evaluated as follows. The results are shown in Tables 9 to 10 below.

<Transparency>
In a cylindrical transparent glass bottle having a diameter of 4 cm and a height of 7.5 cm, each liquid skin cleansing composition of Examples 34 to 43 is put into the mouth of the glass bottle, and a pocket-sized near vision card 40 cm (Co., Ltd.) is placed on the back surface of the glass bottle. (Made by TMI) was placed, the mark in the card was observed, and "transparency" was evaluated based on the following evaluation criteria. The results were determined based on the following criteria by calculating the average evaluation score of 10 expert evaluators. If the average evaluation score is 4.0 points or more, the "transparency" is good.

-Evaluation criteria for "transparency"-
5 points: Transparent and the mark can be clearly confirmed 4 points: Slightly muddy but the mark can be confirmed 3 points: Slightly muddy and the mark is difficult to confirm 2 points: Muddy and the mark can hardly be confirmed 1 point: It is cloudy and the mark cannot be confirmed at all-Criteria for "transparency"-
◎ ◎: 5.0 points ◎: 4.0 points or more and less than 5.0 points ○: 3.5 points or more and less than 4.0 points △: 3.0 points or more and less than 3.5 points ×: less than 3.0 points

The raw materials used in the above Examples and Comparative Examples are shown in Table 11 below.

The liquid skin cleansing composition of the present invention has a large amount of foam, elasticity of foam, good foam retention, stability at low temperature, and good ejection property, but does not cause squeak during cleaning. Because it has an excellent refreshing feeling at the end of rinsing and a moist feeling of the skin after towel drying, it is suitable for, for example, cleansing pigments, hand soaps, body soaps, cleansing foams, makeup removers, etc., and is particularly suitable for body soaps. Used.

Claims (4)

(A) 2% by mass to 20% by mass of higher fatty acid salts containing laurate and myristate,
(B) At least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer.
(C) Polyoxyethylene alkyl ether having an average addition mole number of ethylene oxide of 40 to 120, at least one nonionic surfactant selected from fatty acid monoethanolamide, and (D) polyhydric alcohol. And
The molar ratio of the structural unit derived from the dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 65 mol% or more.
A liquid skin cleansing composition characterized by being filled in a former container. The liquid skin cleansing composition according to claim 1, wherein the mass ratio (A / C) of the (A) higher fatty acid salt to the (C) nonionic surfactant is 2 to 40. (E) The liquid skin cleansing composition according to any one of claims 1 to 2, further comprising amidopropyl betaine. The liquid skin cleansing composition according to any one of claims 1 to 3, wherein the pH is 9.5 to 11.0.