JP6739349B2 - Liquid skin cleansing composition - Google Patents

Description

The present invention relates to liquid skin cleansing compositions.

BACKGROUND ART Conventionally, a skin cleansing composition used for cleaning fingers has a good cleaning power for stains on hands, particularly stains of persistent fat and fish odor caused by ingredients such as meat and fish during cooking. It is desired to have, and various proposals have been made to improve these points.
For example, a detergent composition for a finger which contains an amphoteric surfactant and a fatty acid salt, has an excellent cleaning power for greasy dirt, has a mild and refreshing rinsing feel on the skin, and is hard to leave an odor on the hand. Things have been proposed. (For example, see Patent Document 1)
Also, containing fatty acid or its salt, quaternary ammonium salt, and cationic polymer, it is excellent in foaming, creaminess of foam, and smoothness during rinsing and moist feeling after washing, and suppressing slimyness during rinsing. A skin cleansing composition that has been thoroughly washed is proposed. (For example, see Patent Document 2)
Further, it contains a higher fatty acid salt, an ethylene oxide adduct of a fatty acid monoethanolamide type nonionic surfactant, and a semipolar surfactant, and improves the refreshing feeling of the higher fatty acid while improving the foam performance (foaming property, foam quality). , A foam amount) have been proposed. (For example, see Patent Document 3)

However, among the skin cleansing compositions described in the above-mentioned prior art documents, those having high detergency are mainly liquid skin cleansing compositions, and therefore, irritation to the skin is too strong, and sliminess occurs during rinsing. However, there is a problem that foaming is troublesome and the skin becomes sticky after washing. On the other hand, if the detergency of the liquid skin cleansing composition is weakened, there is a contradictory problem that it is not possible to sufficiently clean the stains of fat on the fingers and the smell of fish during cooking.

Therefore, it has excellent long-lasting foam, no oil stains, no fishy odor, no slimy feel during rinsing, no irritation to the skin, no stickiness of the skin after washing, and low temperature environment. It is desired to provide a liquid skin cleansing composition having all the properties of non-clogging.

JP, 2006-182698, A JP, 2005-154360, A JP, 2004-204087, A

An object of the present invention is to solve the above-mentioned problems in the related art and achieve the following object. That is, the present invention is excellent in the persistence of foam, no dirt of fat, no fishy odor, no slimy feeling during rinsing, no irritation to skin, no stickiness of skin after washing, and low temperature. An object of the present invention is to provide a liquid skin cleansing composition having all the properties of no clogging under the environment. In the present invention, the "low temperature environment" means about 5°C.

As a result of intensive studies by the present inventors to solve the above problems, an alkylamine oxide compound was added to enhance the detergency against stains of fat on hands and smell of fish during cooking and further laurate. By using a fatty acid salt consisting of and myristic acid salt together with a specific cationic polymer, it has a high detergency against stains of fat and the smell of fish, and it has no slimy feeling during rinsing and provides a clean wash. It has been found that a liquid skin cleansing composition that can be realized is obtained.

As a result of intensive studies by the present inventors based on the above findings, (A) a fatty acid salt composed of (A1) lauric acid salt and (A2) myristic acid salt, and (B) an alkylamine oxide compound 1% by mass to 4% %, and (C) dimethyldiallylammonium chloride, and 0.04% by mass to 0.12% by mass of a copolymer containing at least one selected from acrylic acid and acrylamide. The mass ratio (A/C) of the fatty acid salt of the component (A) and the copolymer of the component (C) is 65 to 170, and the liquid skin cleansing composition filled in a former container has Due to the synergistic effect of the ingredients, it has excellent foam sustainability, no oil stains, no fishy odor, no slimy feel during rinsing, no irritation to the skin, no sticky skin after washing, and low temperature. It has been found that it has all the performance of non-clogging under the environment.

The present invention is based on the above findings by the present inventors, and means for solving the above problems are as follows. That is,
<1> A fatty acid salt consisting of (A) (A1) lauric acid salt and (A2) myristic acid salt, (B) alkylamine oxide compound 1% by mass to 4% by mass, and
(C) Dimethyldiallylammonium chloride and 0.04 mass% to 0.12 mass% of a copolymer containing at least one selected from acrylic acid and acrylamide,
The mass ratio (A1/A2) of the laurate salt of the component (A1) and the myristate salt of the component (A2) is 1.5 to 6, and the laurate salt of the component (A1) and the The total content (A1+A2) of the component A2) with myristate is 4% by mass to 10% by mass,
In the copolymer of the component (C), the molar ratio (c1:c2) of the dimethyldiallylammonium chloride (c1) to at least one of the acrylic acid and acrylamide (c2) is 20:80 to 70:30. And the viscosity of the copolymer solution at a solid content of 39 mass% to 45 mass% is 1,200 mPa·s to 6,000 mPa·s at 25° C.,
The mass ratio (A/C) of the fatty acid salt of the component (A) and the copolymer of the component (C) is 65 to 170,
A liquid skin cleansing composition characterized by being filled in a foamer container.
<2> The liquid skin cleansing composition according to <1>, wherein the alkylamine oxide compound as the component (B) is lauryldimethylamine oxide.

According to the present invention, it is possible to solve the above-mentioned problems in the related art and achieve the above-mentioned object, excellent in foam persistence, no dirt of fat, no fishy odor, non-lubricity during rinsing, and skin. It is possible to provide a liquid skin cleansing composition having all the properties of no irritation to skin, no stickiness of skin after washing, and no clogging in a low temperature environment.

(Liquid skin cleansing composition)
The liquid skin cleansing composition of the present invention contains (A) a fatty acid salt, (B) an alkylamine oxide compound, and (C) dimethyldiallylammonium chloride, and at least one selected from acrylic acid and acrylamide. It contains a polymer and, if necessary, further contains other components.

<(A) Fatty acid salt>
The fatty acid salt has detergency, long-lasting foam, no greasy oiliness, no fishy odor, no slimy feel during rinsing, no clogging in low temperature environments, and no irritation to the skin. It is contained for the purpose of improving.
The fatty acid salt of the component (A) is composed of (A1) laurate and (A2) myristate.
Examples of the counterion of the laurate as the component (A1) and the myristate as the component (A2) include alkali metals such as sodium and potassium, triethanolamine and the like. Among these, potassium is preferable from the viewpoints of no greasy stains, no fishy odor, persistence of foam, no slimyness during rinsing, and no clogging in a low temperature environment.
The total content (A1+A2) of the laurate salt of the component (A1) and the myristate salt of the component (A2) depends on the sustainability of the foam, no stain of oil, no fishy odor, and sliminess during rinsing. In view of the lack of liquid, the lack of clogging in a low temperature environment, and the lack of irritation to the skin, it is 4% by mass to 10% by mass, and 5% by mass to 9% by mass with respect to the total amount of the liquid skin cleansing composition. % Is preferred.
If the total content (A1+A2) is less than 4% by mass, the sustainability of foam, the stain-freeness of fat, and the lack of fishy odor may decrease. If the total content exceeds 10% by mass, at the time of rinsing. Lubrication, irritation to skin, and clogging may occur in low-temperature environments.

The content of the lauric acid salt of the component (A1) is a liquid in view of lack of sliminess at the time of rinsing, no stain of fat, no fishy odor, persistence of foam, and no irritation to the skin. 2.5 mass%-8.0 mass% is preferable with respect to the skin cleanser composition whole quantity, 3.4 mass%-7.0 mass% is more preferable. When the content is less than 2.5% by mass, slimyness may occur at the time of rinsing, and there may be poor dirtiness of fat and lack of fishy odor, and when it exceeds 8.0% by mass, Problems such as a decrease in foam persistence and a feeling of irritation on the skin may occur.
The content of the myristic acid salt of the component (A2) is such that foam persistence, no oil stain, no fishy odor, no slimy feel during rinsing, and no clogging in low temperature environment. Therefore, 0.6 mass% to 2.5 mass% is preferable, and 0.9 mass% to 2.0 mass% is more preferable with respect to the total amount of the liquid skin cleansing composition. When the content is less than 0.6% by mass, the sustainability of foam, the stain-freeness of fat, and the lack of fishy odor may be inferior. There may be problems such as non-slimness and clogging in a low temperature environment.

The mass ratio (A1/A2) of the laurate salt of the (A1) component and the myristate salt of the (A2) component is such that there is no slimyness during rinsing, no stain of fat, no fishy odor, and foam. From the viewpoints of the durability, the lack of irritation to the skin, and the lack of clogging in a low-temperature environment, it is 1.5 to 6, and 2 to 5 is preferable. When the mass ratio (A1/A2) is less than 1.5, the slimyness during rinsing, the cleanliness of fat, the lack of fishy odor, and the low clogging in a low temperature environment are poor. However, if it exceeds 6, a problem such as a decrease in foam persistence and a feeling of irritation to the skin may occur.
The fatty acid salt of the component (A) is not particularly limited and may be blended as a fatty acid salt, but the fatty acid and potassium hydroxide, triethanolamine, monoethanolamine and the like are separately prepared in a blending tank. A fatty acid salt may be obtained by adding to the above and neutralizing.

<(B) Alkylamine oxide compound>
The alkylamine oxide compound is contained for the purpose of improving the cleanliness of fat, the absence of fishy odor, the non-irritating sensation to the skin, and the non-lubricity during rinsing.
Examples of the alkylamine oxide compound as the component (B) include alkyldimethylamine oxide and dihydroxyethyllaurylamine oxide.
Examples of the alkyldimethylamine oxide include lauryldimethylamine oxide, myristyldimethylamine oxide, coconut alkyldimethylamine oxide, and oleyldimethylamine oxide. These may be used alone or in combination of two or more.
Among these, lauryl dimethylamine oxide is preferable from the viewpoints of no stain of fat and no fishy smell.
The content of the alkylamine oxide compound as the component (B) is such that the composition of the liquid skin cleansing composition is in terms of the fact that the oil does not stain, does not give a fishy odor, does not irritate the skin, and does not have a slimy feel during rinsing. It is 1% by mass to 4% by mass, preferably 1% by mass to 3% by mass, based on the total amount of the product. If the content is less than 1% by mass, the oil may have no stain and the fishy odor may be reduced. If the content exceeds 4% by mass, the skin may be irritated and slimy during rinsing. Such problems may occur.

<(C) Copolymer of dimethyldiallylammonium chloride and at least one selected from acrylic acid and acrylamide>
The copolymer containing dimethyldiallylammonium chloride and at least one selected from acrylic acid and acrylamide as a monomer unit has no sliminess during rinsing, sustainability of foam, and no clogging in a low temperature environment. , And for the purpose of improving the non-greasiness of the skin after washing.
The copolymer represented by the following general formula (1) is preferable as the copolymer of the component (C).
However, in the said General formula (1), n, m, and z show the molar ratio of each monomer unit, it is n+m+z=100 and n is 0-40 preferably. m is preferably 20 to 70. z is preferably 0 to 80, more preferably 0 to 76. The copolymer represented by the general formula (1) contains at least one of n units derived from acrylic acid and z units derived from acrylamide.

The copolymer represented by the general formula (1) is obtained by copolymerizing the monomer B shown below with at least one of the monomer A shown below and the monomer C shown below. , Can be synthesized.

Examples of the monomer A include acrylic acid (AA) represented by the following structural formula.

Examples of the monomer B include dimethyldiallylammonium chloride (DADMAC) represented by the following structural formula.

Examples of the monomer C include acrylamide (AM) represented by the following structural formula.

The molar ratio (c1:c2) of (c1) dimethyldiallylammonium chloride and (c2) at least one of acrylic acid and acrylamide in the copolymer of the component (C) is 20:80 to 70:30. , 20:80 to 35:65 are preferable. If the ratio of the dimethyldiallylammonium chloride to at least one of the acrylic acid and acrylamide is less than 20 mol, sliminess may occur during rinsing, and if it exceeds 70 mol, the sustainability of foam becomes poor. Occasionally, clogging may occur during use in a low temperature environment.

The proportion of each monomer unit in the component (C) can be determined by measurement by nuclear magnetic resonance (NMR) under the following measurement conditions.
[Measurement condition]
Solvent: Heavy water (D ₂ O)
Measuring device: JNM-LA300 (300 MHz, manufactured by JEOL Ltd.)

The weight average molecular weight of the copolymer of the component (C) is not particularly limited and may be appropriately selected depending on the intended purpose, but is 100, from the viewpoint of the durability of the foam and the non-lubricity during rinsing. 000 to 1,000,000 is preferable, and 100,000 to 500,000 is more preferable. When the weight average molecular weight is less than 100,000, slimyness may occur during rinsing, and when it exceeds 1,000,000, foam persistence may decrease.
The weight average molecular weight of the copolymer of the component (C) is, for example, SEC-MALLS-RI system (measurement condition: column: TSK gel α series α-M column 30 cm manufactured by Tosoh Corporation, solvent: sodium nitrate 0.3M aqueous solution). Can be measured at.

The viscosity of the copolymer solution of the component (C) at a solid content of 39% by mass to 45% by mass is 1,200 mPa·s at 25° C. from the viewpoints of foam sustainability and non-lubricity during rinsing. ˜6,000 mPa·s. Further, the viscosity of the copolymer solution of the component (C) at a solid content of 41% by mass to 45% by mass is preferably 1,200 mPa·s to 4,500 mPa·s at 25°C. The viscosity of the copolymer solution of the component (C) at a solid content of 39% by mass to 43% by mass is preferably 3,000 mPa·s to 6,000 mPa·s at 25° C., and 1,200 mPa·s. -4,500 mPa·s is more preferable.
If the viscosity is less than 1,200 mPa·s, sliminess may occur during rinsing, and if it exceeds 6,000 mPa·s, the sustainability of foam may be reduced.
The viscosity can be measured using, for example, a Brookfield viscometer RVF (manufactured by Brookfield) or a Brookfield viscometer LVF (manufactured by Brookfield).

As the copolymer of the component (C), commercially available products can be used, and examples of the commercially available products include the following.

-Mercoat 3940 (Component name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, display name: Polyquaternium-39, manufactured by Lubrizol, solid content: 41% by mass to 45% by mass, viscosity at 25°C: 1, 500 mPa·s to 4,500 mPa·s, weight average molecular weight: 150,000, n:m:z in the general formula (1)=31:29:40, molar ratio (c1:c2)=29:71), For the viscosity, for example, using a Brookfield Digital Viscometer RVF (manufactured by Brookfield), spindle No. It can be measured using a rotor of No. 3 and under the condition of 60 rpm.

-Mercoat 280 (component name: acrylic acid/dimethyldiallylammonium chloride copolymer, display name: polyquaternium-22, manufactured by Lubrizol Co., solid content: 39 mass% to 43 mass%, viscosity: 3,000 mPas-6 2,000 mPa·s, weight average molecular weight: 450,000, n:m:z in the general formula (1)=35:65:0, molar ratio (c1:c2)=65:35), and the viscosity is, for example, , Brookfield Digital Viscometer LVF (manufactured by Brookfield) at 25°C. 4 rotors can be used and it can measure on the conditions of 60 rotations/minute.

-Mercoat 281 (a low pH type of the above-mentioned Marcoat 280, a type that does not contain an antiseptic, component name: acrylic acid/dimethyldiallylammonium chloride copolymer, display name: Polyquaternium-22, manufactured by Lubrizol, solid content: 39% by mass to 43% by mass, viscosity: 4,000 mPa·s to 15,000 mPa·s, weight average molecular weight: 450,000), and the viscosity is, for example, Brookfield Digital Viscometer LVF (manufactured by Brookfield). Spindle No. at 25° C. 4 rotors can be used and it can measure on the conditions of 60 rotations/minute.

-Mercoat 740 (component name: dimethyldiallylammonium chloride-acrylamide copolymer, display name: polyquaternium-7, manufactured by Lubrizol Co., solid content 41% by mass to 45% by mass, viscosity at 25°C: 1,200 mPa-s- 4,500 mPa·s, weight average molecular weight: 120,000, n:m:z=0:24:76 in the general formula (1), molar ratio (c1:c2)=24:76), and the viscosity is For example, using a Brookfield Digital Viscometer RVF (manufactured by Brookfield), the spindle No. It can be measured using a rotor of No. 3 and under the condition of 60 rpm.

Salcare Super 7 AT1 (Display name: Polyquaternium-7, manufactured by BASF, solid content 39% by mass to 41% by mass, viscosity 3,500 mPa.s to 6,000 mPa.s, weight average molecular weight 150,000, the above general formula In (1), n:m:z=0:25:75, molar ratio (c1:c2)=25:75), and the viscosity is measured using, for example, a Brookfield Digital Viscometer RVF (manufactured by Brookfield). Spindle No. at 25°C It can be measured under the condition of 10 revolutions/minute using a rotor of No. 3.

Among these, from the viewpoint of non-lubricity during rinsing, in the general formula (1), the molar ratio (n:m:z) is 0:24:76, and the solid content is 41% by mass to 45% by mass, 25% by mass. Mercoat 740 (“polyquaternium-7”) having a viscosity at 1,200 mPa·s to 4,500 mPa·s is preferably used.
The "polyquaternium-39", the "polyquaternium-22", and the "polyquaternium-7" are names of ingredients indicated by the Japan Cosmetic Industry Federation.

The content of the copolymer of the component (C) is a liquid in view of lack of sliminess during rinsing, persistence of foam, non-greasiness of skin after washing, and non-clogging in a low temperature environment. The amount is 0.04% by mass to 0.12% by mass, preferably 0.05% by mass to 0.1% by mass, based on the total amount of the skin cleanser composition. If the content is less than 0.04% by mass, defects such as sliminess during rinsing and deterioration of foam persistence may occur, and if it exceeds 0.12% by mass, skin after washing Problems such as stickiness and clogging in low temperature environments may occur.

<Mass ratio (A/C)>
The mass ratio (A/C) of the content (mass %) of the fatty acid salt of the component (A) and the content (mass %) of the copolymer of the component (C) is such that the stickiness after washing is not present. From the viewpoint of no stain of fat, no fishy odor, no slimy feel during rinsing, and no irritation to the skin, it is 65 to 170, and 67 to 150 is preferable. If the mass ratio (A/C) is less than 65, the stickiness of the skin after washing, the cleanliness of fat, and the lack of fishy odor may decrease. Lubrication and irritation to the skin may occur.

<Other ingredients>
In the liquid skin cleansing composition of the present invention, in addition to the components (A) to (C) described above, other components may be added, if necessary, within a range that does not impair the effects of the present invention. it can.
Examples of the other components include water, oils, silicones, alcohols such as lower or higher alcohols, polyhydric alcohols, lanolin derivatives, protein derivatives, acrylic resin dispersions, drugs such as vitamins, bactericides, preservatives. Agents, potassium hydroxide, citric acid, hydrochloric acid, pH adjusting agents such as triethanolamine, antioxidants, sequestering agents, ultraviolet absorbers, animal and plant extracts or their derivatives, chelating agents such as edetic acid, dyes, fragrances, Examples thereof include pigments, inorganic powders, clay minerals, water-insoluble polymer compound powders such as nylon and polyethylene. These may be used alone or in combination of two or more.

<Method for producing liquid skin cleansing composition>
The method for producing the liquid skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose. For example, the component (A), the component (B), and the component (C), Further, it can be produced by mixing the above-mentioned other components as necessary. Water in the other components is preferably added as a residual amount so that the total amount of the liquid skin cleansing composition is 100% by mass.
The liquid skin cleansing composition may be prepared using a device. The device is not particularly limited and may be appropriately selected depending on the purpose. Examples thereof include a stirring device having a shearing force and equipped with a stirring blade capable of mixing the whole.
The stirring blade is not particularly limited and may be appropriately selected depending on the purpose, and examples thereof include a propeller, a turbine, and a disper.

The liquid skin cleansing composition of the present invention is of a type that is filled in a foamer container, is discharged in the form of foam, and is not washed off. Since it is foamy, it is easier to use than gel-like or spray-like ones and can be easily sterilized and washed in the absence of water. It is also possible to provide a germicidal detergent product comprising a liquid skin cleansing composition of the type which is not washed off, and a foamer container which contains the liquid skin cleansing composition and discharges it in the form of foam.

The non-wash-off type means a type in which a foamy liquid skin cleansing composition is picked up by hand and spread on a sterilizing/cleaning target, for example, the skin of the hand, the whole body, etc., and then it is used without washing with water or the like. The method of use is not particularly limited and may be appropriately selected depending on the intended purpose. A few times a day, an appropriate amount of 1 g to 15 g is foamed and taken in a hand, and the sterilization/purification target, eg, hand, whole body, etc. There is a method of making it spread.

<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 it can discharge the liquid skin cleansing composition with air in a foamed state, and can be appropriately selected according to the purpose, for example, Examples thereof include a squeeze former container capable of discharging foam by manually squeezing the bottle body, and a pump former container capable of discharging foam by pressing down the nozzle portion. As such a former container, for example, a product made by Yamato Seikan Co., Ltd. or a product made by Yoshino Industry Co., Ltd. can be used.
The non-gas type foam discharge container usually has a porous film body (preferably a plastic material such as nylon, polyester, or polyolefin) for forming bubbles, and the liquid skin cleansing composition is porous. Bubbles are formed by passing through the membrane. The mesh of the porous membrane is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 100 mesh or more, more preferably 100 mesh or more and 400 mesh or less, and 200 mesh or more 350 mesh. The following is more preferable.
The number of the porous membranes is not particularly limited and may be appropriately selected depending on the purpose, but is preferably 2 to 4 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.

-Viscosity-
When the liquid skin cleansing composition is used with a pump former container capable of discharging foam by pushing down a pump and two 200 meshes, the viscosity of the liquid skin cleansing composition under a temperature condition used is: It is not particularly limited and can be appropriately selected depending on the purpose, but at 25° C., 1 mPa·s to 20 mPa·s is preferable, and 1 mPa·s to 10 mPa·s is more preferable.
The viscosity is, for example, using a BL type viscometer (manufactured by Tokyo Keiki Co., Ltd.), at a sample temperature of 25° C., a BL adapter when the sample temperature is less than 10 mPa·s, and a rotation speed of 60 rpm, 10 mPa·s to 20 mPa·s If the rotor No. 1. The viscosity after 1 minute can be measured at a rotation speed of 60 rpm.

-PH-
The liquid skin cleansing composition has a pH of preferably 9.5 to 11.0, and preferably 9.8 to 10.6, from the viewpoint of foam sustainability, no greasy dirt, and no fishy odor. More preferable.
The pH can be measured at 25° C., for example, according to the pH measurement method of the quasi drug raw material standard 2006 general test method.

<Use>
The liquid skin cleansing composition of the present invention has excellent foam persistence, no oil stains, no fishy odor, no slimy feel during rinsing, no irritation to the skin, and no skin irritation after washing. Suitable for body soap, hand soap, foam hand soap, liquid hand soap, face wash, kitchen hand soap, etc. because it has all the properties of non-greasiness and non-clogging in low temperature environment. Can be used for.

The present invention will be specifically described below with reference to examples of the present invention, but the present invention is not limited to these examples. The content of each component is a pure content conversion value.

(Examples 1-32 and Comparative Examples 1-19)
-Preparation of liquid skin cleansing composition-
Liquid skin cleansing compositions (hand soaps) of Examples 1 to 32 and Comparative Examples 1 to 19 each having the composition and content (% by mass) shown in the following table were prepared according to a conventional method. The pH (25° C.) of each liquid skin cleansing composition was adjusted to 10 with potassium hydroxide. The pH was measured at 25°C in accordance with the pH measurement method of the Quasi-drug Raw Material Standard 2006 General Test Method.

-Preparation of liquid skin cleansing composition in a container-
The obtained liquid skin cleansing compositions of Examples 1 to 32 and Comparative Examples 1 to 18 were used for pump former containers (a) [net: 200 mesh, manufactured by Yoshino Industry Co., Ltd. The same as the pump used in Example 2 of 193972)]] to prepare a liquid skin cleansing composition in a pump former container. The liquid skin cleansing composition of Comparative Example 19 was filled in a container (b) with a dispenser [discharge amount 1 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Canyon Inc.], and the liquid skin cleansing composition in a container with a dispenser. It was a thing.

-Evaluation-
Next, for each of the obtained liquid skin cleansing composition in a container, "no fat stain", "no fishy odor", "foam persistence", and "rinsing time" were measured as follows. Evaluation was made on "non-lubrication", "no irritation to skin", "non-greasiness of skin after washing", and "no clogging in low temperature environment". The results are also shown in the table below.

<No dirt of fat>
10 professional panels (2 men, 8 women) spread 1 g of beef tallow over both hands, wet both hands with water, and then took 1 push (approx. 1 g) of liquid skin cleanser composition in each container for 20 hands. After rubbing the hands together for 2 seconds and rinsing with running water (25° C.) at a flow rate of 2 L per minute for 1 minute, the “fat-freeness” was evaluated according to the following evaluation criteria. As for the results, the average value of the scores of 10 professional panels was obtained and judged based on the following judgment criteria.
[Evaluation criteria]
4 points: No greasiness of greasy dirt is felt 3 points: Feeling of greasy dirt slightly adhering, but acceptable level 2 points: Minor greasiness of greasy dirt 1 point: Greasy I feel the stickiness of dirt
[Judgment criteria]
◎: 3.5 points or more and 4.0 points or less ○: 3.0 points or more and less than 3.5 points △: 2.0 points or more and less than 3.0 points ×: Less than 2.0 points

<Lack of fishiness>
Specialized panel 10 people (2 men, 8 women) spread 1 g of raw fish (fillet of mackerel) over both hands, wet both hands with water, and then push 1 push of liquid skin cleanser composition in each container (about 1 g). ), rub hands for 20 seconds, rinse with running water (25°C) at a flow rate of 2 L per minute for 1 minute, and after towel drying, sniff out the smell of the fish remaining in both hands, and "no fishyness" Was evaluated according to the following evaluation criteria. As for the results, the average value of the scores of 10 professional panels was obtained and judged based on the following judgment criteria.
[Evaluation criteria]
5 points: No fishy odor at all 4 points: Very slight fishy odor 3 points: Slight fishy odor is felt but no problem level 2 points: Fishy odor 1 point : Almost no fish smell
[Judgment criteria]
⊚: 4.0 or more and 5.0 or less ○: 3.0 or more and less than 4.0 Δ: 2.0 or more and less than 3.0 x: less than 2.0

<Foam persistence>
Specialized panel 10 people (2 men, 8 women) picked up 1 push (about 1 g) of the liquid skin cleansing composition in each container, rubbed both hands 10 times, and the amount of foam immediately after rubbing 10 times. After the rubbing and rubbing, the amount of foam after standing for 10 seconds was compared to determine "foam persistence" based on the following evaluation criteria. As for the results, the average value of the scores of 10 professional panels was obtained and judged based on the following judgment criteria.
[Evaluation criteria]
5 points: No change in foam amount 4 points: Almost no change in foam amount 3 points: Slight decrease in foam amount 2 points: Significant decrease in foam amount 1 point: No bubbles left on hand [ Judgment criteria]
⊚: 4.0 or more and 5.0 or less ○: 3.0 or more and less than 4.0 Δ: 2.0 or more and less than 3.0 x: less than 2.0

<Dryness when rinsing>
Special panel 10 people (2 men and 8 women) wet their hands with water, picked up 1 push (about 1 g) of the liquid skin cleansing composition in each container and rubbed both hands for 20 seconds. After that, it was rinsed with running water (25° C.) having a flow rate of 2 L/min for 1 minute, and then “non-lubrication during rinsing” was evaluated by the following evaluation criteria. As for the results, the average value of the scores of 10 professional panels was obtained and judged based on the following judgment criteria.
[Evaluation criteria]
5 points: No slimy feel at the time of rinsing 4 points: Slight slimy feel at the time of rinsing 3 points: Slight slimy feel at the time of rinsing but no problem 2 points: Rinsing Feel the sliminess of time 1 point: Almost no slimy feel when rinsing
[Judgment criteria]
⊚: 4.0 or more and 5.0 or less ○: 3.0 or more and less than 4.0 Δ: 2.0 or more and less than 3.0 x: less than 2.0

<No irritation to the skin>
10 specialized panels (2 men, 8 women) who feel that they have sensitive skin pick up 1 push (about 1 g) of liquid skin cleanser composition in each container and rub both hands for 10 seconds. After that, it was rinsed with running water (25° C.) at a flow rate of 2 L/min for 1 minute, towel-dried, and then “not irritating to skin” such as tingling itch and itching was evaluated according to the following evaluation criteria. As for the results, the average value of the scores of 10 professional panels was obtained and judged based on the following judgment criteria.
[Evaluation criteria]
5 points: No irritation to the skin at all 4 points: Almost no irritation to the skin 3 points: Somewhat irritation to the skin 2 points: Irritation to the skin 1 point: Strong irritation to the skin Feel [Judgment criteria]
⊚: 4.5 points or more and 5.0 points or less ○: 4.0 points or more and less than 4.5 points Δ: 3.0 points or more and less than 4.0 points ×: Less than 3.0 points

<Non-greasy skin after washing>
Specialized panel 10 people (2 men, 8 women) picked up 1 push (about 1 g) of liquid skin cleanser composition in each container, rubbed both hands for 10 seconds, and then flowed at 2 L/min. After rinsing with running water (25° C.) for 1 minute and towel-drying, “non-greasy skin after washing” was evaluated based on the following evaluation criteria. As for the results, the average value of the scores of 10 professional panels was obtained and judged based on the following judgment criteria.
[Evaluation criteria]
5 points: No stickiness on the skin at all 4 points: Almost no stickiness on the skin 3 points: Very slight stickiness on the skin but no problem level 2 points: Sensitive on the skin 1 point: Very Feels sticky on the skin [Criteria]
⊚: 4.0 or more and 5.0 or less ○: 3.0 or more and less than 4.0 Δ: 2.0 or more and less than 3.0 x: less than 2.0

<No clogging in low temperature environment>
Each liquid skin cleansing composition was prepared by filling the pump foamer container (a) with the liquid skin cleansing composition of Examples 1 to 33 and Comparative Examples 1 to 18 and containing the pump foamer container. Five pieces were produced for each item. Further, in Comparative Example 19, five liquid skin cleanser compositions in a container with a dispenser filled in the container (b) with a dispenser were prepared.
The liquid skin cleansing composition in each pump former container and the liquid skin cleansing composition in each dispenser container were stored at 5° C. for 1 month in the dark. During storage, press the pump of the pump former container or the pump of the container with dispenser 5 times at a rate of once a week, and about the ease of pressing the first pump, one expert panel based on the following evaluation criteria. Evaluated. As for the result, the average value of the scores for one month was obtained and judged based on the following judgment criteria. If the mesh in the pump former container is clogged, the operation of the pump becomes heavy and it becomes difficult to push.
[Evaluation criteria]
5 points: Pump can be pushed very smoothly 4 points: Pump can be pushed smoothly 3 points: Pump can be pushed slightly smoothly 2 points: Pump is heavy and can only be pushed a little 1 point : Pump cannot be pushed [Criteria]
⊚: 4.0 or more and 5.0 or less ○: 3.0 or more and less than 4.0 Δ: 2.0 or more and less than 3.0 x: less than 2.0

(Example 33)
The preferred formulation examples of the liquid skin cleansing composition (hand soap) are shown below.

The specific contents of the components used in the liquid skin cleansing compositions of Examples 1 to 33 and Comparative Examples 1 to 19 are as shown in Tables 13 and 14 below.

-(C) component and (C) comparative component-
*1: Brookfield viscometer RVF (manufactured by Brookfield), spindle No. 3,60 rpm/25℃
*2: Brookfield viscometer RVF (manufactured by Brookfield), spindle No. 4,60 rpm/25℃

The liquid skin cleansing composition of the present invention has excellent foam persistence, no oil stains, no fishy odor, no slimy feel during rinsing, no irritation to the skin, and no stickiness on the skin after washing. Since it has all the properties of non-drying and non-clogging in low temperature environment, it is suitable for body soap, hand soap, foam hand soap, liquid hand soap, face wash, kitchen hand soap, etc. is there.

Claims (4)

(A) a fatty acid salt consisting of (A1) laurate and (A2) myristate,
(B) Alkylamine oxide compound 1% by mass to 4% by mass, and
(C) Dimethyldiallylammonium chloride and 0.04 mass% to 0.12 mass% of a copolymer containing at least one selected from acrylic acid and acrylamide,
The mass ratio (A1/A2) of the laurate salt of the component (A1) and the myristate salt of the component (A2) is 1.5 to 6, and the laurate salt of the component (A1) and the The total content (A1+A2) of the component A2) with myristate is 4% by mass to 10% by mass,
In the copolymer of the component (C), the molar ratio (c1:c2) of the dimethyldiallylammonium chloride (c1) to at least one of the acrylic acid and acrylamide (c2) is 20:80 to 70:30. And the viscosity of the copolymer solution at a solid content of 39 mass% to 45 mass% is 1,200 mPa·s to 6,000 mPa·s at 25° C.,
The mass ratio (A/C) of the fatty acid salt of the component (A) and the copolymer of the component (C) is 65 to 170,
Liquid skin cleansing composition characterized by being filled in a foamer container (however, polyoxypropylene polyoxyethylene alkyl ether, Po polyoxypropylene polyoxyethylene alkenyl ether, or liquid skin cleansing composition comprising a sorbitol except for). The liquid skin cleansing composition according to claim 1, wherein the alkylamine oxide compound as the component (B) is lauryldimethylamine oxide. The liquid skin cleansing composition according to claim 1, which has a pH at 25° C. of 9.5 to 11.0. The content of (A1) laurate is 3.4% by mass to 7.0% by mass, and the content of (A2) myristate is 0.9% by mass to 2.0% by mass. 4. The liquid skin cleansing composition according to any one of 3 to 3.