JP2017214372A - Skin cleansing composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin cleansing composition that can impart a moist feeling and a soft skin touch to the skin after cleansing, and gives massage effect during cleansing and a stop feeling during rinsing.SOLUTION: A skin cleansing composition contains following components (A)-(E): (A) acylamino acid-based surfactant; (B) nonionic surfactant; (C) sugar alcohol; (D) water-soluble polymer; and (E) water.SELECTED DRAWING: None

Description

  The present invention relates to a skin cleansing composition.

  Skin cleansers are required not only to remove dirt on the skin such as sebum and makeup cosmetics, but also to provide a moist skin feel to the washed skin and to have a massage property during washing. . As a technique for such required characteristics, a composition containing 0.1 to 7% by weight of an anionic surfactant, 20 to 65% by weight of polyols and 10 to 50% by weight of water (Patent Document 1), a carboxyvinyl polymer, Water-soluble salt, liquid oil agent, nonionic surfactant, polyhydric alcohol, skin cleanser containing water (Patent Document 2), polar oil, nonionic surfactant less than HLB7, nonionic above HLB7 A cleansing cosmetic (Patent Document 3) containing a surfactant, an alkyl-modified carboxyvinyl polymer and an acylamino acid type surfactant has been proposed.

JP 2001-172168 A JP 2010-280597 A JP 2011-126809 A

However, in recent years, skin conditions and cosmetic behavior have changed, such as an increase in the number of people with deep dryness that can feel skin firmness, and improved use of massage equipment at home, and consumer demand is higher. It is a thing. With the technique of the said patent document 1, massage property is not enough so that the hardness of the skin which is increasing as a recent skin trouble can be eliminated. Further, the technique of Patent Document 2 does not provide a feeling of stop after cleaning, and lacks a refreshing feeling after rinsing, which is one of the recent required characteristics. Furthermore, it has been found that the technique of Patent Document 3 has room for improvement in the moist feeling of the skin after washing and the soft skin feel. As described above, the above-described technique cannot cope with such a request.
Therefore, the subject of this invention is providing the skin cleansing composition which can provide the moist feeling and the soft skin touch to the skin after washing | cleaning, and the massage property at the time of washing | cleaning and the stop feeling at the time of a rinse are obtained.

  Therefore, as a result of various studies to solve the above-mentioned problems, the present inventor has combined a water-soluble polymer, a sugar alcohol, and water with an acylamino acid surfactant and a nonionic surfactant to obtain skin after washing. The present inventors have found that a skin cleanser that significantly improves the feel, has excellent massage properties during washing, and provides a stop feeling during rinsing, has been completed.

That is, the present invention provides a skin cleansing composition containing the following components (A) to (E).
(A) Acylamino acid type surfactant (B) Nonionic surfactant (C) Sugar alcohol (D) Water-soluble polymer (E) Water

When the skin cleansing composition of the present invention is used, a good massage property can be obtained at the time of washing, a stop feeling can be obtained at the time of rinsing, and a moist and soft skin feel can be imparted to the washed skin. Therefore, it is particularly excellent as a skin cleansing agent for humans having a deep dry trouble on the skin and humans who want to obtain a massage feeling during cleaning.
The massage property at the time of washing is that, firstly, when the agent is applied to the skin, the agent has an appropriate hardness suitable for massage, and secondly, when the massage is continued, It means a state where moderate hardness is maintained.

  Component (A) used in the skin cleansing composition of the present invention is an acylamino acid surfactant. The acylamino acid-based surfactant is used as a cleaning base in the skin cleansing agent of the present invention and contributes to imparting a stop feeling upon rinsing. As the acylamino acid surfactant, N-acylamino acid or a salt thereof is used. The acyl group of the N-acylamino acid or salt thereof (A) is derived from a fatty acid having a saturated or unsaturated linear or branched chain having 4 to 30 carbon atoms from the viewpoint of obtaining bubbling, detergency and a feeling of stop when rinsing. More preferably, it is derived from a fatty acid having a saturated or unsaturated linear or branched chain having 6 to 26 carbon atoms, and is preferably a saturated or unsaturated linear or branched chain having 8 to 24 carbon atoms. What derived from the fatty acid which has this is more preferable. Examples of such fatty acids include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid and the like. Among these fatty acids, from the viewpoint of improving foam quality and storage stability, one or more selected from lauric acid, myristic acid, palmitic acid and oleic acid are preferable, and lauric acid is more preferable. The acyl group of the N-acylamino acid may be derived from a mixed fatty acid of the above fatty acid, for example, coconut oil, palm kernel oil or the like. Especially, what was obtained from coconut oil fatty acid and palm kernel fatty acid as a raw material is preferable, and what was obtained from coconut oil fatty acid as a raw material is more preferable.

The amino acid part of the N-acyl amino acid or a salt thereof is preferably a neutral amino acid selected from glycine and alanine, and an acidic amino acid selected from glutamic acid and aspartic acid, from the viewpoint of obtaining foam quality, detergency and a feeling of stopping during rinsing. Neutral amino acids are more preferable, and glycine is more preferable.
As the component (A), N-acylglycine and N-acylalanine are preferable, and N-acylglycine is more preferable.

  The N-acylamino acids or salts thereof may be used alone or in combination of two or more. Among these, N-lauroyl glutamic acid, N-myristoyl glutamic acid, N-cocoyl glutamic acid, N-palm fatty acid glutamic acid, N-lauroyl aspartic acid, N-cocoyl glycine from the viewpoint of obtaining foam quality, detergency and a feeling of stop at the time of rinsing 1 or more selected from N-cocoylalanine and salts thereof, N-lauroylglutamic acid, N-myristoylglutamic acid, N-cocoylglutamic acid, N-palm fatty acid glutamic acid, N-cocoylglycine, N-cocoylglycine and these More preferably, one or more selected from N-cocoyl glycine, N-cocoyl alanine and salts thereof is more preferable, and one or more selected from N-cocoyl glycine and salts thereof is more preferable. Further preferred. In the component (A), the total amount of N-cocoylglycine, N-cocoylalanine or a salt thereof is preferably 90% by mass or more, more preferably 95% by mass or more, further preferably 99% by mass or more, and substantially 100 Even more preferred is mass%.

  As the salt of the N-acylamino acid or a salt thereof, from the viewpoint of improving foaming and foam quality, alkali metal salts such as sodium and potassium; alkaline earth metal salts such as calcium and magnesium; other salts such as aluminum and zinc Inorganic salts; ammonium salts; organic amines such as monoethanolamine, diethanolamine, triethanolamine, AMP (2-amino-2-methyl-1-propanol), 2-amino-2-hydroxymethyl-1,3-propanediol Salts; other organic salts such as basic amino acid salts such as arginine, lysine, histidine, ornithine and the like. The N-acylamino acid or a salt thereof may be one or more salts selected from alkali metal salts, triethanolamine salts, and arginine salts from the viewpoint of reducing irritation to the skin and availability. Preferably, it is more preferably one or more salts selected from sodium salts, potassium salts, triethanolamine salts and arginine salts, more preferably one or more salts selected from sodium salts and potassium salts, A sodium salt is even more preferred.

  Moreover, when mix | blending N-acylamino acid, it neutralizes with a base and uses it. As a base to be neutralized, sodium hydroxide, potassium hydroxide, monoethanolamine, triethanolamine, diethanolamine, ammonia, AMP (2-amino-2-methyl-1-propanol), 2-amino-2-hydroxymethyl -1,3-propanediol, lysine, arginine, histidine, sodium acetate, potassium acetate and the like, sodium salt and potassium salt from the viewpoint of improving foaming and foam quality, reduction of skin irritation and availability A base selected from sodium hydroxide, potassium hydroxide, arginine and triethanolamine so as to be an arginine salt and a triethanolamine salt, and one or two bases selected from sodium hydroxide and potassium hydroxide are More preferred. In addition, in order to finally reach the desired pH value of the skin cleansing agent, it is necessary to add general sodium hydroxide, potassium hydroxide, triethanolamine, ammonia, lysine, arginine, histidine, etc. as necessary. Various bases may be used. In any case, various general acids such as hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, citric acid, malic acid, lactic acid, fumaric acid, and succinic acid are added to adjust the pH of the skin cleanser. May be used.

The content of the component (A) is preferably 0.001% by mass or more, and 0.002% by mass in the skin cleansing composition from the viewpoint of obtaining a feeling of stop at the time of rinsing and improving the cleaning power and foam quality. The above is more preferable, 0.005% by mass or more is further preferable, 1.5% by mass or less is preferable, 1.2% by mass or less is more preferable, 1.0% by mass or less is further preferable, and 0.5 or less is preferable. More preferred is 0.08 or less. The specific range of the content of component (A) is preferably 0.001 to 1.5 mass%, more preferably 0.02 to 1.2 mass%, and further 0.005 to 1.0 mass%. Preferably, 0.005 to 0.5 mass% is more preferable, and 0.005 to 0.08 mass% is more preferable.
In general, soap forms a salt with a metal such as calcium contained in tap water, and scum is generated. By leaving this scum on the skin, there is no feeling of stickiness, and a feeling (stop feeling) with frictional resistance can be obtained. On the other hand, when using a general anionic surfactant that is less irritating to the skin other than soap, scum is less likely to form than soap, so the active agent feels less likely to be washed away from the skin surface. It feels like that (smoothness), and there is no stop feeling.
However, in the present invention, an acylamino acid surfactant is used as the component (A), and a scum is formed by interaction with other specific components, thereby realizing a stop feeling and reducing a feeling of stickiness. can do.

Component (B) used in the present invention is a nonionic surfactant. The nonionic surfactant is considered to contribute to the hardness of the agent at the start of cleaning and the hardness of the agent 30 seconds after the start of cleaning, that is, the persistence of the massage.
Examples of the component (B) include glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, propylene glycol fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene. Examples include polyoxypropylene glycol, alkyl glyceryl ether, polyethylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyethylene hydrogenated castor oil, alkyl alkanolamide, alkyl fatty acid alkanolamide, alkyl polyglucoside and the like.
Among these, glycerin fatty acid ester, polyoxyethylene alkyl ether, alkyl glyceryl ether, and alkyl polyglucoside are preferable from the viewpoint of the sustainability of massage. These components (B) can use 1 type (s) or 2 or more types.
In the present invention, the alkylpolyglucoside as the component (B) has a sugar skeleton, is a disaccharide or more, and specifically has an alkyl group having 6 to 18 carbon atoms shown below. Alkyl polyglucosides are preferred.

(In formula, R shows a C6-C18 linear or branched alkyl group, and the condensation degree p is 4-20.

  The content of component (B) is 0.5% in the skin cleanser composition of the present invention at the start of washing and from the viewpoint of improving the hardness of the agent 30 seconds after the start of washing, that is, the sustainability of massage. % By mass or more is preferable, 0.7% by mass or more is more preferable, 0.8% by mass or more is more preferable, 10% by mass or less is preferable, 6% by mass or less is more preferable, and 3% by mass or less is more preferable. 2 mass% or less is more preferable. As content range of specific component (B), 0.5-10 mass% is preferable, 0.7-6 mass% is more preferable, 0.8-3 mass% is further more preferable, 0.8 More preferably, it is ˜2% by mass.

Component (C) used in the present invention is a sugar alcohol. Sugar alcohol is considered to contribute to imparting a moist and soft skin feel to the skin after washing.
Examples of the component (C) include glucose, maltose, xylitol, lactitol, paranitite, sorbitol, maltitol, mannitol, erythritol, trehalose, glucosyl trehalose, polyoxyalkylene alkyl glucoside and the like. Among these, sorbitol and polyoxyalkylene alkyl glucoside are more preferable. These sugar alcohols can be used alone or in combination of two or more.
Here, examples of the alkyl group of the alkyl glucoside in the polyoxyalkylene alkyl glucoside include alkyl groups having 1 to 4 carbon atoms such as a methyl group and an ethyl group. Of these, polyoxyalkylene methyl glucoside is preferable from the viewpoint of imparting a moist and soft skin feel to the washed skin. Polyoxyalkylene methyl glucoside is represented by the following formula (1).

(In the formula, A represents a linear or branched alkylene group having 2 to 4 carbon atoms, and a, b, c and d represent the average number of added moles and represent a number of 2 to 20).

  As the polyoxyalkylene alkyl glucoside, commercially available products can be used. For example, Macbiobride MG-20E (manufactured by NOF Corporation), MACBIOBRIDE MG-10E (manufactured by NOF Corporation), Glucam E-10 LFG (made by Nippon Lubrizol Co., Ltd.) is mentioned. The number of polyoxyethylene chains (PEO chains) contained in a commercially available polyoxyalkylene alkyl glucoside can be represented by a + b + c + d having the structure shown in (1) above. For example, Macbiobride MG-20E has 20 PEO chains, and Macbiobride MG-10E and Glucam E-10 LFG have 10.

  The content of the component (C) is preferably 1% by mass or more, more preferably 5% by mass or more in the skin cleanser composition of the present invention, from the viewpoint of imparting a moist and soft skin feel to the skin after washing. Preferably, 10% by mass or more is more preferable, 40% by mass or less is preferable, 35% by mass or less is more preferable, 30% by mass or less is further preferable, 25% by mass or less is further preferable, and 20% by mass or less is further preferable. The content of the specific component (C) is preferably 1 to 40% by mass, more preferably 5 to 35% by mass, further preferably 10 to 30% by mass, further preferably 10 to 25% by mass, and 10 to 20%. More preferred is mass%.

  Component (D) used in the present invention is a water-soluble polymer. The water-soluble polymer is considered to increase the viscosity of the cleaning agent and improve the hardness of the agent at the start of cleaning and the hardness of the agent 30 seconds after the start of cleaning, that is, the persistence of the massage. Examples of the component (D) include carrageenan, dextrin, methylcellulose, ethylcellulose, hydroxyethyl group or hydroxypropyl group-added cellulose, polyvinyl alcohol, polyacrylic acid, sodium polyacrylate, polymethacrylic acid, carboxyvinyl polymer, acrylic. Acid / alkyl (meth) acrylate copolymers, xanthan gum, carboxymethyl chitin, chitosan and the like are included. Among these, cellulose, carboxyvinyl polymer, acrylic acid / (meth) acrylic acid alkyl copolymer, and xanthan gum to which a hydroxyethyl group or hydroxypropyl group is added are preferable, and hydroxyethyl cellulose and carboxyvinyl polymer are particularly preferable. These can be used singly or in combination of two or more selected from cellulose having a hydroxyethyl group or hydroxypropyl group added thereto, a carboxyvinyl polymer, and an acrylic acid / (meth) acrylate alkyl copolymer. It is preferable to use hydroxyethyl cellulose and carboxyvinyl polymer.

  Examples of acrylic acid / (meth) acrylic acid alkyl copolymers include Pemlen TR-1, Pemlen TR-2, Carbopol ETD2020, Carbopol 1382, Carbopol 1342 (manufactured by Lubrizol Advanced Materials), AQUPEC HV. Commercially available products such as -501ER (manufactured by Sumitomo Seika Co., Ltd.) can be used.

In addition, a cellulose to which a hydroxyethyl group or a hydroxypropyl group is added is one in which a part of hydrogen atoms in the hydroxyl group of cellulose is substituted with a hydroxyethyl group or a hydroxypropyl group, and has a substituent other than these. May be.
Specific examples include hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, and the like.
These are obtained by reacting cellulose with caustic soda to make alkaline cellulose, and then reacting methyl chloride, monochloroacetic acid, ethylene oxide, propylene oxide, etc. to replace the hydrogen atom in the hydroxyl group of cellulose.

These celluloses have an average degree of substitution of greater than 0, more preferably 0.5 or more, preferably 3 or less, and more preferably 2 or less. The weight average molecular weight is preferably 200,000 or more, more preferably 500,000 or more, more preferably 650,000 or more, and 3,000,000 from the viewpoint of improving the massage sustainability of the skin cleansing composition. The following is preferable, 2,000,000 or less is more preferable, and 1,600,000 or less is still more preferable.
In the present invention, the average degree of substitution is determined by NMR, and the weight average molecular weight is determined by using a gel permeation chromatography (GPC) -multi-angle laser light scattering detector (MALLS) system with polyethylene oxide as a standard substance. Measured by

  The cellulose to which a hydroxyethyl group or a hydroxypropyl group is added is preferably hydroxyethyl cellulose or hydroxypropyl methylcellulose, preferably having an average degree of substitution of 0.5 to 2 and a weight average molecular weight of 650,000 to 1,600,000. .

  Examples of the cellulose to which a hydroxyethyl group or a hydroxypropyl group is added include, for example, CELLOSIZE QP52000H (manufactured by Dow Chemical Co., Ltd.), HEC Daicel SE400, SE500, SE600, SE850, SE900 (manufactured by Daicel Finechem), etc. Commercially available products such as METOLOSE 60SH, 65SH (manufactured by Shin-Etsu Chemical Co., Ltd.), BENECEL E50, E4M, E10M, F4MC, K99C, K4M, K15M, K35M, K100M, K200M (and above, manufactured by ASLAND) Goods can be used.

  In addition, water-soluble polymers such as polyacrylic acid and carboxyvinyl polymer are preferably used in combination with potassium hydroxide or the like as a neutralizing agent. Moreover, 1 or more types can be used for a component (D), and it has a preferable initial viscosity in order to maintain a massage.

  The content of the component (D) is preferably 0.2% by mass or more from the viewpoint of improving the hardness of the agent at the start of cleaning and the hardness of the agent 30 seconds after the start of cleaning, that is, the sustainability of the massage. 0.3 mass% or more is more preferable, 0.5 mass% or more is more preferable, 0.6 mass% or more is further more preferable, 5 mass% or less is preferable, 3 mass% or less is more preferable, and 2 mass%. % Or less is more preferable, 1.5% by mass or less is more preferable, and 1.2% by mass or less is even more preferable. As content range of specific component (D), 0.2-5 mass% is preferable, 0.3-3 mass% is more preferable, 0.5-2 mass% is further more preferable, 0.6 -1.5 mass% is still more preferable, and 0.6-1.2 mass% is still more preferable.

  The component (E) used in the present invention is water. The content of water is the content of the component (D) and the component (E) from the viewpoint of improving the hardness of the agent at the start of cleaning and the hardness of the agent 30 seconds after the start of cleaning, that is, the sustainability of the massage. The mass ratio (D / E) is preferably 0.005 or more, more preferably 0.01 or more, still more preferably 0.015 or more, still more preferably 0.02 or more, and preferably 0.1 or less, 0 0.06 or less is more preferable, 0.04 or less is more preferable, and 0.03 or less is more preferable. The range of D / E is preferably 0.005 to 0.1, more preferably 0.01 to 0.06, still more preferably 0.015 to 0.04, and even more preferably 0.02 to 0.03. preferable.

  In the present invention, from the viewpoint of improving the sustainability of the massage, the total amount (B + D) of the component (B) and the component (D) is preferably 1% by mass or more, more preferably 1.5% by mass or more. % By mass or more is more preferable, 10% by mass or less is preferable, 5% by mass or less is more preferable, and 3% by mass or less is more preferable. The range of (B + D) is preferably 1 to 10% by mass, more preferably 1.5 to 5% by mass, and still more preferably 2 to 3% by mass.

  The skin cleansing composition of the present invention may further contain a polyhydric alcohol excluding component (C) as component (F). By containing the component (F), the moist skin feel after washing is further improved. Component (F) used in the present invention includes, for example, polyethylene glycol such as ethylene glycol, diethylene glycol, and triethylene glycol; polypropylene glycol such as propylene glycol and dipropylene glycol; 1,3-butylene glycol, 1,4-butylene glycol And polyglycerins such as glycerin and diglycerin. Among these, 1 or more types chosen from ethylene glycol, propylene glycol, 1, 3- butylene glycol, and glycerol are preferable, and what contains glycerol is more preferable. A component (F) can use 1 type (s) or 2 or more types.

  The content of the component (F) is preferably 5% by mass or more, more preferably 10% by mass or more, and more preferably 15% by mass or more in the skin cleaning composition from the viewpoint of imparting moist feeling to the skin after washing. More preferably, 30% by mass or more is even more preferable, 60% by mass or less is preferable, 55% by mass or less is more preferable, 50% by mass or less is further preferable, and 48% by mass or less is even more preferable. 5-60 mass% is preferable, as for content of a specific component (F), 10-55 mass% is more preferable, 15-50 mass% is further more preferable, 30-48 mass% is still more preferable.

  In addition to the above-mentioned components, the skin cleanser composition of the present invention further includes components used in ordinary cleansing agents, for example, surfactants other than those described above, moisturizers, oil components, bactericides, anti-inflammatory agents, antiseptics , Chelating agents, thickeners, salts, pearling agents, scrub agents, perfumes, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts and the like. Each of these agents is not limited to the use as each agent, but depending on the purpose, for example, a fragrance is used as a cooling sensation agent, or as a combination with other uses, for example, a fragrance and a cooling sensation agent. It can be used as one that produces the effects as described above.

Other surfactants include polyoxyethylene alkyl ether acetate, higher fatty acid salt, alkyl sulfate ester salt, polyoxyethylene alkyl ether sulfate, N-acyl taurine salt, phosphate ester salt, N-acyl-N. -Carboxyethyl glycine salt, N-alkylamide alkanol sulfate, acyl isethionate, alkylbenzene sulfonate, lauryl dimethylaminoacetic acid betaine, stearyl dimethylaminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazo Examples include linium betaine, lauric acid amidopropyl betaine, and lauryl hydroxysulfobetaine.
Among these, from the viewpoint of improving detergency, polyoxyethylene alkyl ether acetate, more preferably polyoxyethylene (2-6 mol) alkyl ether acetate, for example, in a skin cleanser composition. It is also one of the preferred embodiments to contain 0.01 to 2% by mass, more preferably 0.1 to 1% by mass.
From the same viewpoint, the content of the higher fatty acid salt having 8 to 18 carbon atoms is preferably 1% by mass or less, more preferably 0.5% by mass or less, and more preferably 0.1% by mass in the skin cleanser composition. % Or less is more preferable, and 0% by mass is even more preferable.
The content of surfactants other than component (B), polyoxyethylene (2-6 mol) alkyl ether acetate and higher fatty acid salt having 8 to 18 carbon atoms is a skin cleanser from the viewpoint of reducing skin irritation. In a composition, 5 mass% or less is preferable, 3 mass% or less is more preferable, and 1 mass% or less is further more preferable.

  The content of the oil component is preferably 1% by mass or less, more preferably 0.5% by mass or less, still more preferably 0.1% by mass or less, and still more preferably 0% by mass in the skin cleanser composition.

  In the present invention, the viscosity of the skin cleanser is less than 1000 mPa · s, using a B-type viscometer (TV-B type, Tokyo Keiki), rotor No. 2. Measured at 12 rpm. For the viscosity of 1000 mPa · s or more and less than 100,000 mPa · s, use a B8R type helical stand (TV-B type, Tokyo Keiki), spindle TA, rotation speed of 5 rpm, viscosity of 100,000 mPa · s or more is spindle TB , Measured at 5 rpm.

In order to obtain a massage feeling that is excellent in the hardness of the agent at the initial stage of washing (after 5 seconds) and does not spill from the face, it is preferable that the agent has an appropriate agent hardness and thickness. The viscosity of is preferably 10,000 to 120,000 mPa · s, more preferably 20,000 to 60000 mPa · s, and still more preferably 30,000 to 50,000 mPa · s.
The cleaning agent in such a range can obtain a good stop feeling because the agent hardly remains on the skin at the time of rinsing.

  EXAMPLES Next, an Example is given and this invention is demonstrated still in detail.

Examples 1-13 and Comparative Examples 1-4
(Production method)
To the component (E), the carboxyvinyl polymer of the component (D) is added, mixed, and dispersed. Then, it mixed under 70 degreeC heating with the other component, and cooled at room temperature (25 degreeC) after that.
Evaluation was conducted by 10 professional panelists.
Using 2 g of each skin cleanser, the entire face was washed by hand massage for 30 seconds and then rinsed with water. Tables 1 and 2 show the compositions and evaluation results.

(Cleaning agent massage)
1) Hardness / thickness of the agent when the cleaning agent is applied to the skin and massaged for 5 seconds If the agent is hard, the agent will be thick, and if the agent is not hard, the agent will drip (in the extreme case) Water) There is no thickness. Evaluation was made with 5 having the most suitable hardness / thickness for massage property, 1 being too soft and dripping or 1 being too hard.
2) The firmness and thickness of the agent when applied to the skin and massaged for 30 seconds The firmness and thickness of the agent when massaged for 5 seconds and the firmness and thickness of the agent when massaged for 30 seconds Evaluation was made with 5 having the least difference and 1 having the most difference.
3) Stop feeling at the end of rinsing The panelists scored 5 when the feeling of stopping at the end of rinsing was strong and 1 when it was not felt at all.
4) Moist feeling after washing The panelists scored 5 when the feeling of moistness at the end of rinsing was most moist and 1 when it was not felt at all.
5) The softness of the skin after washing The panelists scored 5 when the softness of the skin at the end of rinsing felt the softest and 1 when it was not felt at all.

Judgment ◎: Average point is 4.5 points or more ○: Average point is 3.5 points or more and less than 4.5 points Δ: Average point is 2.5 points or more and less than 3.5 points ×: Average point is 2. Less than 5 In the table, “◎” to “○” means that the evaluation result is “、”, but among the examples showing “◎” in the same evaluation item, the score is the lowest. “O” to “Δ” mean that the evaluation result is “O”, but the result is the lowest score among the examples showing “O” in the same evaluation item.

  From the results of Tables 1 and 2, the skin cleanser of the present invention is the firmness / thickness of the agent at the initial stage of washing (after 5 seconds), the firmness of the agent after washing (after 30 seconds) (= massage persistence) It was excellent in the feeling of stop at the time of rinsing, moist feeling after washing, and the softness of the skin after washing. On the other hand, the comparative example lacking the configuration of the present invention was inferior in usability.

  Skin cleansing agents having the following formulations were produced in the same manner as in Examples 1-13. Then, when the same test as described above was conducted, the hardness of the agent at the initial stage of washing, the hardness of the agent after washing (after 30 seconds) (= massage persistence), the feeling of stopping when rinsing, the moist feeling after washing It was excellent in the softness of the skin after washing.

Claims (5)

A skin cleanser composition containing the following components (A) to (E).
(A) Acylamino acid type surfactant (B) Nonionic surfactant (C) Sugar alcohol (D) Water-soluble polymer (E) Water   The skin cleansing composition according to claim 1, wherein the content ratio (D / E) of the component (D) and the component (E) is 0.01 or more and 0.05 or less.   The skin cleansing composition according to claim 1 or 2, wherein the content of the component (D) is 0.5 mass% or more and 2 mass% or less.   The skin cleansing composition according to any one of claims 1 to 3, wherein the viscosity is 10,000 mPa · s or more and 120,000 mPa · s or less.   Furthermore, (F) Skin cleansing composition of any one of Claims 1-4 containing polyhydric alcohols other than sugar alcohol.