JP2021070653A - Skin cleanser - Google Patents

Abstract

To provide a skin cleanser having excellent foamability and foam quality during use, having excellent moist feeling or smoothness of the skin after washing and hardly sensing sliminess during rinsing when used by applying it to the skin during foaming and when a stock solution is applied to the skin.SOLUTION: There is provided a skin cleanser which contains 0.001 to 1.0 mass% of an oil and fat (A1) which is selected from oils and fats (A) which are solid at 28°C and has a fatty acid composition containing 60 mass% or more of a fatty acid component having 12 or 14 carbon atoms, 0.001 to 1.0 mass% of an oil and fat (A2) which is selected from oils and fats (A) which are solid at 28°C and has a fatty acid composition containing 60 mass% or more of a fatty acid component having 16 or 18 carbon atoms, 0.05 to 1.0 mass% of a cationized cellulose, 0.5 to 10 mass% of a polyoxyethylene sorbitan monolaurate in which the average addition molar number of ethylene oxide is 60 to 100 mol and 1.5 to 15 mass% of an anionic surfactant, wherein the content ratio [(A1)/(A2)] of the fat and oil (A1) to the fat and oil (A2) is 10/1 to 1/5.SELECTED DRAWING: None

Description

The present invention relates to a skin cleanser.

Anionic surfactants such as fatty acid soaps and amino acid surfactants are widely used as a base material for general skin cleansers because they have excellent detergency and foaming power. Further, there is known a method of combining an anionic surfactant with a nonionic surfactant or the like to design a formulation having excellent foaming and foam quality while maintaining a feeling of use without sliminess.
For example, Patent Document 1 describes one or more selected from higher fatty acid salts, carbovetaine-type amphoteric surfactants, and sulfobetaine-type amphoteric surfactants, polyoxyethylene sorbitan fatty acid esters solid at 28 ° C., and polyhydric alcohols. Disclosed is a liquid detergent composition which is excellent in foam quality and imparts a refreshing feeling at the time of rinsing by combining the above in a specific ratio.
Further disclosed is a method of blending a cationized polymer, silicones, hydrocarbons, vegetable and animal liquid oils, or semi-solid fats into a cleansing composition for the purpose of enhancing the moisturizing feeling of the skin after washing. ing. For example, Patent Document 2 describes one or more high-HLB polyoxyethylene sorbitan fatty acids selected from N-acyltaurine-type anionic surfactants, carbobetaine-type amphoteric surfactants, and sulfobetaine-type amphoteric surfactants. A liquid cleaning agent composition is disclosed in which a creamy and stable foam is obtained by combining an ester and a polyhydric alcohol in a specific ratio, and the liquid cleaning agent composition is excellent in a long-lasting moisturizing feeling after washing. Further, Patent Document 3 has good foaming and foam quality containing N-acylamino acid salt, solid or semi-solid oil at 28 ° C., and cationized polysaccharide, and gives a moist feeling after towel drying. Excellent skin cleansing compositions are disclosed.
In the conventional general method, a cleaning sponge is impregnated with a liquid detergent, the sponge is rubbed and foamed, and then the skin is rubbed with the sponge and rinsed with water. However, in recent years, due to the growing tendency toward sensitive skin, instead of using a sponge for cleaning, the undiluted solution of the cleaning agent is applied to the skin by hand and foamed on the skin. May be done. Until now, sufficient development has not been made from such a point of view, and there is room for improvement in the sliminess during rinsing when using the undiluted solution.

Japanese Unexamined Patent Publication No. 2014-156537 JP-A-2017-193625 Japanese Unexamined Patent Publication No. 2013-163658

An object of the present invention is not only excellent in foaming and foam quality during use, and also excellent in moisturizing and smoothness of the skin after washing, but also when foaming and applying to the skin and when using the undiluted solution by applying to the skin. The purpose is to provide a skin cleansing agent that does not feel slimy during rinsing.

As a result of repeated studies to solve the above problems, the present inventors have found that a desired skin cleansing agent can be obtained by combining the following components in a specific ratio, and have completed the present invention. It was.
(A) The following two types of fats and oils selected from solid fats and oils at 28 ° C .:
(A1) A fat or oil having a fatty acid composition in which the triglyceride contained in the fat or oil contains 60% by mass or more of a fatty acid component having 12 or 14 carbon atoms;
(A2) A fat or oil having a fatty acid composition in which the triglyceride contained in the fat or oil contains 60% by mass or more of a fatty acid component having 16 or 18 carbon atoms.
(B) Cationized cellulose,
(C) Polyoxyethylene sorbitan monolauric acid ester having an average addition mole number of ethylene oxide of 60 to 100 moles, and
(D) Anionic surfactant.

That is, the skin cleaning agent of the present invention has a fatty acid composition selected from solid fats and oils (A) at 28 ° C. and containing 60% by mass or more of a fatty acid component in which triglyceride contained in the fats and oils has 12 or 14 carbon atoms. A fatty acid component in which the fat (A1) possessed is 0.001 to 1.0% by mass and is selected from the fat (A) solid at 28 ° C. and the triglyceride contained in the fat is 16 or 18 carbon atoms. 0.001 to 1.0% by mass of fat (A2) having a fatty acid composition containing 60% by mass or more, 0.05 to 1.0% by mass of cationized cellulose (B), and an average addition molar of ethylene oxide. The fat and oil containing 0.5 to 10% by mass of the polyoxyethylene sorbitan monolauric acid ester (C) and 1.5 to 15% by mass of the anionic surfactant (D) having a number of 60 to 100 mol. The content ratio [(A1) / (A2)] of the fat (A1) to A2) is 10/1 to 1/5 by mass.

The skin cleansing agent of the present invention is excellent in foaming and foam quality during use, and is not only excellent in moisturizing and smoothness of the skin after washing, but also when foamed and applied to the skin and when the undiluted solution is applied to the skin. It is hard to feel slimy when rinsing in any case when using it.

The skin cleaning agent of the present invention is a fat or oil that is solid at 28 ° C. and has a fatty acid composition containing 60% by mass or more of a fatty acid component in which triglyceride contained in the fat or oil has 12 or 14 carbon atoms. (A1), a fat (A2) which is a solid fat at 28 ° C. and has a fatty acid composition containing 60% by mass or more of a fatty acid component in which triglyceride contained in the fat has 16 or 18 carbon atoms. Contains cationized cellulose (B), polyoxyethylene sorbitan monolauric acid ester (C) having an average addition molar number of 60 to 100 mol of ethylene oxide, and anionic surfactant (D), and is added as necessary. Contains agents and solvents such as water.

The present invention specifically includes the following embodiments.
Oil (A1) selected from solid fats and oils (A) at 28 ° C. and having a fatty acid composition containing 60% by mass or more of a fatty acid component in which triglyceride having 12 or 14 carbon atoms is contained in the fats and oils is 0. .001 to 1.0% by mass, selected from solid fats and oils (A) at 28 ° C., and has a fatty acid composition containing 60% by mass or more of a fatty acid component in which triglyceride contained in the fats and oils has 16 or 18 carbon atoms. Polyoxy in which the fat (A2) is 0.001 to 1.0% by mass, the cationized cellulose (B) is 0.05 to 1.0% by mass, and the average number of moles of ethylene oxide added is 60 to 100 mol. Contains 0.5 to 10% by mass of ethylene sorbitan monolauric acid ester (C) and 1.5 to 15% by mass of anionic surfactant (D), and contains the fat (A1) with respect to the fat (A2). A skin cleaning agent having a mass ratio [(A1) / (A2)] of 10/1 to 1/5 by mass.
Hereinafter, the components of the skin cleanser will be described in order.

(Fat and oil (A) solid at 28 ° C. containing triglyceride as the main component)
The solid oil (A) used in the skin cleansing agent of the present invention can improve the moisturizing feeling such as the moist feeling and smoothness of the skin after washing. Considering the feel of the skin during and after washing, an oil containing triglyceride as a main component is preferable to other oils.
The fats and oils that are solid at 28 ° C. are not particularly limited as long as they are usually used for cosmetics. For example, vegetable oil can be used, and examples thereof include astropotassium murmur seed fat, shea butter, and coconut oil. Cosmetic grade vegetable oils usually contain 80% by weight or more of triglyceride.
When these fats and oils are added to the cleansing agent, the feel of the skin during and after washing differs depending on the length of the carbon chain of triglyceride contained in the fats and oils. As a result of diligent studies, fats and oils (A1) having a fatty acid component having 12 or 14 carbon atoms in the fatty acid composition constituting triglyceride contained in the fats and oils having a content ratio of 60% by mass or more, and those contained in the fats and oils. It has been found that the effect of the present invention is exhibited by combining fats and oils (A2) in which the content ratio of the fatty acid component having 16 or 18 carbon atoms in the fatty acid composition constituting the triglyceride is 60% by mass or more.
Here, the "fatty acid composition constituting triglyceride" or the "fatty acid composition of triglyceride" means the composition of the fatty acid component constituting the molecular structure of triglyceride.
For the fatty acid composition of triglyceride, a method of isolating triglyceride by solution extraction, TLC (thin layer chromatography), etc., and then using LC, LC-MS, GC-MS, etc. alone or in combination, or a reference fat analysis test method. 4.2 It can be analyzed by the FID constant temperature gas chromatograph method in the fatty acid composition (Japan Oil Chemists' Society).
As the fat (A1), for example, astropotassium murumuru seed fat and coconut oil can be used, and astropotassium murumuru seed fat is preferable. As the fat (A2), for example, shea butter and cacao butter can be used, and shea butter is preferable.
Two or more types of fats and oils (A1) may be used in combination, and two or more types of fats and oils (A2) may be used in combination.
The content of the fat (A1) is 0.001 to 1.0% by mass, preferably 0.005 to 0.5% by mass, and more preferably 0.05 to 0% of the total amount of the skin cleansing agent. .2% by mass. Similarly, the content of the fat (A2) is 0.001 to 1.0% by mass, preferably 0.005 to 0.5% by mass, and more preferably 0.05 in the total amount of the skin cleansing agent. ~ 0.2% by mass.
When the content of the fat (A1) or the fat (A2) is less than the above range, the moist feeling, smoothness and foam quality of the skin after washing may be insufficient. On the other hand, when the content of the fat (A1) or the fat (A2) is larger than the above range, foaming and foam quality may be insufficient. In particular, when the content of fats and oils (A2) is too large, the skin tends to become slimy at the time of rinsing, both when it is foamed and applied to the skin and when the undiluted solution is applied to the skin and used.
Regarding the ratio of the content of the fat (A1) to the content of the fat (A2) [(A1) / (A2)], the mass ratio is 10/1 to 1/5 from the viewpoint of preventing sliminess when using the undiluted solution. The range is preferably 5/1 to 1/3, more preferably 2/1 to 1/2, and particularly preferably 3/2 to 2/3.
When the content ratio [(A1) / (A2)] is within the above range, it is possible to obtain an excellent moist feeling and smoothness of the skin after washing without causing a decrease in foaming or sliminess. it can.

(Cationized Cellulose (B))
The component (B) used in the present invention is cationized cellulose in which a cationic functional group is added to cellulose. The component (B) can improve the moist feeling and smoothness of the skin after washing.
Examples of commercially available products of the component (B) include "Product names: Leoguard MGP, KGP" manufactured by Lion Corporation and "Product names: Katinal HC-100, LC-100, HC-100, LC" manufactured by Toho Chemical Industry Co., Ltd. -200 "and the like.
The content of the component (B) is 0.05 to 1.0% by mass, preferably 0.1 to 0.8% by mass, and particularly preferably 0.3 to 0.6% of the total amount of the skin cleansing agent. It is mass%. If it is less than 0.05% by mass, the foam quality and the moist feeling and smoothness of the skin after washing may be reduced. If it is more than 1.0% by mass, foaming may decrease, and there is a risk of sliminess during rinsing both when foaming and applying to the skin and when using the undiluted solution on the skin. There is.

(Polyoxyethylene sorbitan monolauric acid ester (C) in which the average number of moles of ethylene oxide added is 60 to 100 moles)
The component (C) used in the present invention is a polyoxyethylene sorbitan monolauric acid ester, which is blended to impart foaming power and viscosity to a skin cleanser.
In the present invention, the average number of moles of ethylene oxide added (abbreviated as "EO") is 60 to 100 mol, preferably 65 to 95 mol, particularly preferably 70 to 90 mol, of polyoxyethylene sorbitan monolauric acid. The ester is used as the component (C).
Specific commercially available products of such polyoxyethylene sorbitan monolauric acid ester include, for example, polyoxyethylene sorbitan monolauric acid ester (80EO) (“Nonion LT-280” manufactured by Nichiyu Co., Ltd.) and the like. .. The component (C) can be used alone or in combination of two or more.
The content of the component (C) is 0.5 to 10% by mass, preferably 2.0 to 8.5% by mass, and particularly preferably 3.0 to 7.0% by mass, based on the total amount of the skin cleansing agent. Is. If it is less than 0.5% by mass, foaming and foam quality may deteriorate, and if it is more than 10% by mass, it may cause sliminess and stickiness during rinsing, and the foaming speed may decrease and foam quality may deteriorate. There is.

(Anionic Surfactant (D))
The component (D) used in the present invention is blended to impart foaming power and detergency to the skin cleansing agent, and can be used alone or in combination of two or more.
Specific examples of the anionic surfactant include alkyl sulfates, polyoxyethylene alkyl ether sulfates (for example, sodium polyoxyethylene lauryl ether sulfate), alkylamide ether sulfates, polyoxyethylene amide ether sulfates, and the like. Sulfate: Sulfates such as α-olefin sulfonate, N-acyl acetylionate; N-acylmethyl taurine salt (eg, cocoyl methyl taurine sodium), N-acyl glutamate, N-acyl methyl alanine ( For example, N-acylamino acid salts such as lauroylmethyl-β-alanine sodium), N-acylsulfosin salt; potassium laurate higher fatty acid salt; alkylacetate salts such as polyoxyethylene alkyl ether acetate; alkyl phosphate, polyoxy Alkyl phosphate ester salts such as ethylene alkyl ether phosphate; N-acyl polypeptide salts such as coconut oil fatty acid hydrolyzed collagen potassium and lauroyl hydrolyzed silk sodium; alkyls such as dialkyl sulfosuccinic acid and polyoxyalkylene alkyl sulfosuccinate. Examples include sulfosuccinate. Among these, sulfate ester salt, sulfonate, N-acylmethyl taurine salt and N-acylamino acid salt are preferable, and N-acylmethyl taurine salt is more preferable. The carbon number of these alkyl groups or acyl groups is preferably 10 to 18, and more preferably 12 to 14 from the viewpoint of detergency and foaming power.
Examples of the counterion of the above-mentioned anionic surfactant include alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, amino acid salts and the like.
The content of the component (D) is 1.5 to 15% by mass, preferably 3.0 to 12% by mass, and more preferably 5.0 to 10% by mass in the total amount of the skin cleansing agent. If it is less than 1.5% by mass, foaming and foam quality are lowered, and if it exceeds 15% by mass, the moist feeling and smoothness of the skin after washing are lowered.

(Additive)
The skin cleanser may contain additives as long as the effects of the present invention are not impaired. Additives include polyhydric alcohols such as glycerin, diglycerin, polyethylene glycol, sorbitol, martitol, isomartitol; sugars such as lactose, fructose, sucrose, maltose, trehalose, isomaltooligosaccharide; beef fat, pig Natural fats and oils such as fats; waxes such as beeswax and carnauba wax; silicone derivatives such as highly polymerized dimethylpolysiloxane, polyether-modified dimethylpolysiloxane, amino-modified dimethylpolysiloxane; ceramide, cholesterol, protein derivatives, lanolin, lanolin derivatives, Oily bases such as lecithin; amphoteric surfactants such as amide amino acid salts and betaine amidopropyldimethylaminoacetate; polyoxyethylene alkyl ethers, polyethylene glycol fatty acid esters, polyoxyethylene hydrogenated castor oil, polyglycerin fatty acid esters, polyoxy Nonionic surfactants such as ethylene glycerin fatty acid ester, glycerin monofatty acid ester, alkylpolyglucoside, alkanolamide; cationic surfactants such as alkyltrimethylammonium chloride; semipolar surfactants such as alkyldimethylamine oxide; pyrrolidone Organic or inorganic salts such as carboxylates, citrates, malate, salt; acids and alkalis as pH adjusters; bactericides; chelating agents; antioxidants; blood circulation promoters; UV absorbers; UV scatterers Natural extracts derived from animals and plants; ascorbic acid and its derivatives; flavonoids such as anthocyanin and its derivatives; vitamins; amino acids; photosensitizers; pigments; pigments; fragrances and the like.

The skin cleansing agent of the present invention can be produced by a general method for producing a liquid skin cleansing agent.
The skin cleanser of the present invention can be used as a body soap, hand soap, face wash and the like.
The skin cleansing agent of the present invention is used in a method of impregnating a cleansing sponge containing water with the skin cleansing agent of the present invention, kneading the sponge to lather, and rubbing the skin with the sponge, similarly to the conventional cleansing agent. You may.
When the skin cleansing agent of the present invention is used, it is excellent in foaming and foam quality, and not only is excellent in moisturizing feeling such as moisturizing and smoothness of the skin after washing, but also it is difficult to feel slimy when foaming and rinsing.
In particular, when the skin cleanser of the present invention is applied to the skin in the undiluted state and washed by a method that reduces friction on the skin, such as rubbing by hand or weakly with a wash towel with soft fibers, the undiluted solution is applied to the skin. However, even though it is rubbed very gently, it has the effect of not feeling slimy during rinsing. Therefore, the skin cleanser of the present invention is suitable for users with sensitive skin and users with a high awareness of beauty.

Next, the present invention will be described in more detail by way of examples.
[Examples 1 to 5 and Comparative Examples 1 to 3]
1. 1. Preparation of skin cleansing agent A skin cleansing agent was prepared by mixing components A to D, C'components and other components while heating at the blending ratios shown in Table 1. The ratio of the components in Table 1 is mass%.
Specifically, a skin cleanser was prepared according to the following procedure.

2. Materials used In the examples, the following materials were used.
(A1) Ingredient: Astropotassium Murmur Seed fat (A2) Ingredient: Shea butter (B) Ingredient: Polyquaternium-10
Component (C): Polyoxyethylene sorbitan monolauric acid ester (80EO)
(C') Ingredient: Polysorbate 80
(D) Ingredients: Sodium cocoyl methyl taurine Other ingredients (1): Cocamidopropyl betaine Other ingredients (2): Oleyl alcohol

The astropotassium murumuru seed fat used as the component (A1) was of cosmetic grade and contained about 80% by mass to 90% by mass of triglyceride. The content ratio of the fatty acid component having 12 carbon atoms in the fatty acid composition constituting triglyceride contained in the astropotassium mulmul seed fat is about 40% by mass to 55% by mass, and the fatty acid number 14 in the fatty acid composition constituting the triglyceride. The content ratio of the fatty acid component of was about 20% by mass to 30% by mass. The melting point of the astropotassium murumuru seed fat used as the component (A1) was about 35 ° C.
The shea butter used as the component (A2) was cosmetic grade and contained about 80% by mass to 90% by mass of triglyceride. In the fatty acid composition constituting triglyceride contained in the shea butter, the content ratio of stearic acid (18 carbon atoms) is about 40% by mass to 50% by mass, and the content ratio of oleic acid (18 carbon atoms) is about 40% by mass. It was% to 50% by mass. The melting point of the shea butter used as the component (A2) was about 32 ° C.
As the component (C), polyoxyethylene sorbitan monolauric acid ester (80EO.), The trade name "Nonion LT-280" (manufactured by NOF CORPORATION) was used.

3. 3. Evaluation Method Twenty men and women (25 to 45 years old) were used as panelists, and the obtained skin cleansing agent was used to cleanse by the following methods (A) and (B) and evaluated.
[Method (A)]
After lathering the skin cleanser with a sponge, it was applied to the whole body and rinsed off. In this method, (1) foaming, (2) foam quality, (3) moist feeling and smoothness after washing, and (4) sliminess when washing with foaming were evaluated.
[Method (B)]
The undiluted skin cleanser was applied to the whole body and rinsed off. In this method, (5) sliminess when using the undiluted solution was evaluated. The evaluation criteria for each evaluation item are shown below. The evaluation results are shown in Table 1.

(1) Foaming (A) Scoring criteria for individual panelists 2 points: I felt that foaming was good.
1 point: I felt that the bubbling was fair.
0 points: I felt that the foaming was a little bad.
The total score of 20 people was calculated and judged as follows.
(B) Evaluation Criteria for Foaming ⊚: There are no panelists who evaluated the total score as 35 points or more and 0 points. A skin cleanser with very good foaming.
◯: The total score is 30 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less. A skin cleanser with good foaming.
Δ: The total score is 20 points or more and less than 30 points. A skin cleanser with slightly poor foaming.
X: The total score is less than 19 points. A skin cleanser with poor foaming.

(2) Foam quality (A) Scoring criteria for individual panelists 2 points: I felt that the foam quality was creamy.
1 point: I felt that the foam quality was a little creamy.
0 points: I felt that the foam quality was rough.
The total score of 20 people was calculated and judged as follows.
(B) Evaluation Criteria for Foam Quality ⊚: The total score was 35 points or more, and 0 panelists evaluated it as 0 points. A skin cleanser with very good foam quality.
◯: The total score is 30 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less. A skin cleanser with good foam quality.
Δ: The total score is 20 points or more and less than 30 points. A skin cleanser with slightly poor foam quality.
X: The total score is less than 19 points. A skin cleanser with poor foam quality.

(3) Moist feeling and smoothness after washing (A) Scoring criteria for individual panelists 2 points: I felt that my skin was moisturized.
1 point: I felt that my skin was a little moisturized.
0 points: I felt that my skin was dry and not moisturized.
The total score of 20 people was calculated and judged as follows.
(B) Evaluation criteria for moist feeling and smoothness after washing ◎: No panelists evaluated the total score as 35 points or more and 0 points. A skin cleanser that can moisturize the skin after cleansing.
◯: The total score is 30 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less. A skin cleanser that can slightly moisturize the skin after cleansing.
Δ: The total score is 20 points or more and less than 30 points. A skin cleanser that does not easily moisturize the skin after cleansing.
X: The total score is less than 19 points. A skin cleanser that cannot moisturize the skin after cleansing.

(4) Slimy during rinsing when using whipping (A) Scoring criteria for individual panelists 2 points: When using whipping, no slimy feeling was felt during rinsing.
1 point: When using with whipping, I felt almost no slimy feeling during rinsing.
0 points: When using with foaming, I felt slimy when rinsing.
The total score of 20 people was calculated and judged as follows.
(B) Evaluation criteria for sliminess during rinsing when whipping and using ⊚: The total score is 35 points or more, and 0 panelists evaluate it as 0 points. It is a skin cleanser that does not feel slimy when used with foaming.
◯: The total score is 30 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less. It is a skin cleanser that does not feel a little slimy when used with foaming.
Δ: The total score is 20 points or more and less than 30 points. It is a skin cleanser that makes you feel a little slimy when you use it with foam.
X: The total score is less than 19 points. A skin cleanser that feels slimy when used with foaming.

(5) Sliminess during rinsing when using undiluted solution (A) Scoring criteria for individual panelists 2 points: When using undiluted solution applied without foaming, no sliminess was felt during rinsing.
1 point: When the undiluted solution was applied and used without foaming, almost no slimy feeling was felt during rinsing.
0 points: When using the undiluted solution without foaming, I felt slimy during rinsing.
The total score of 20 people was calculated and judged as follows.
(B) Evaluation criteria for sliminess during rinsing when using undiluted solution ⊚: No panelists evaluated the total score as 35 points or more and 0 points. It is a skin cleanser that does not feel slimy when the undiluted solution is applied and used without foaming.
◯: The total score is 30 points or more and less than 35 points, or the total score is 35 points or more and the number of panelists evaluated as 0 points is 1 or more and 2 or less. It is a skin cleanser that does not feel a little slimy when the undiluted solution is applied and used without foaming.
Δ: The total score is 20 points or more and less than 30 points. It is a skin cleanser that makes you feel a little slimy when you apply the undiluted solution without foaming.
X: The total score is less than 19 points. It is a skin cleanser that feels slimy when the undiluted solution is applied and used without foaming.

4. Explanation of Evaluation Results As is clear from the results shown in Table 1, the skin cleansers of Examples 1 to 5 are excellent in foaming and foam quality during use, and are also excellent in moisturizing and smoothness of the skin after washing. However, it was a skin cleanser that did not feel slimy when it was whipped and when it was rinsed when using the undiluted solution.
On the other hand, sufficient performance was not obtained with the skin cleansers of Comparative Examples 1 to 4.
In Comparative Example 1, since the component (A1) was not blended, a slimy feeling was felt during rinsing when using the undiluted solution.
In Comparative Example 2, since polysorbate 80 was used as another nonionic surfactant (C') instead of the polyoxyethylene sorbitan monolauric acid ester which is the component (C), the foam quality was poor and the undiluted solution was used. The result was also insufficient for the slimy feeling when rinsing.
In Comparative Example 3, since the component (B) was not blended, foaming and foam quality were poor, and the moist feeling and smoothness of the skin after washing were also insufficient.
In Comparative Example 4, since the component (D) was not blended, evaluations other than moist feeling and smoothness, that is, foaming, foam quality, slimy feeling when rinsing when foaming, and rinsing when using the undiluted solution The result was bad about the slimy feeling of time.
As described above, the skin cleansing agent of the present invention is excellent in foaming and foam quality, excellent in moisturizing and smoothness of the skin after washing, and is not slimy even when the undiluted solution is used.

Claims (1)

A fat (A1) selected from solid fats and oils (A) at 28 ° C. and having a fatty acid composition containing 60% by mass or more of a fatty acid component having triglyceride having 12 or 14 carbon atoms contained in the fats and oils is 0. .001-1.0% by mass,
A fat (A2) selected from solid fats and oils (A) at 28 ° C. and having a fatty acid composition containing 60% by mass or more of a fatty acid component having 16 or 18 carbon atoms as triglyceride contained in the fats and oils is 0. .001-1.0% by mass,
Cationized cellulose (B) in 0.05-1.0% by mass,
0.5 to 10% by mass of polyoxyethylene sorbitan monolauric acid ester (C) having an average addition mole number of ethylene oxide of 60 to 100 mol, and
Containing 1.5 to 15% by mass of the anionic surfactant (D)
A skin cleanser in which the content ratio of the fat (A1) to the fat (A2) [(A1) / (A2)] is 10/1 to 1/5 by mass ratio.