CN110354014B - Cleansing composition for skin - Google Patents

Abstract

The present invention provides a cleansing composition for skin, which has moderate viscosity, excellent fineness of foam texture even when foaming is difficult, excellent foam volume and foam elasticity, and no slippery feeling after rinsing. This composition contains the following (a) component - (d) component. The mass ratio [a/(b+c)] is 0.1-1.0, and the mass ratio (d/a) is 0.10-0.60. (a) fatty acid salt with 8 to 22 carbon atoms: 1 to 30% by mass (b) amphoteric surfactant: 1 to 30% by mass (c) acyl amino acid anionic surfactant: 1 to 20% by mass ( d) Polyoxyethylene fatty acid diester-type nonionic surfactant represented by formula (1): 1 to 10% by mass R ¹ ‑O‑(CH ₂ ‑CH ₂ ‑O) _n ‑R ² …(1) R ¹ and R ² each independently represent an acyl group having 10 to 18 carbon atoms, and n represents an integer of 50 to 200.

Description

Cleansing composition for skin

technical field

The present invention relates to cleansing agent compositions for skin such as facial cleanser, body wash, and hand wash. In more detail, it relates to a cleansing composition for skin that has moderate viscosity, excellent fineness of foam texture, excellent foam volume and foam elasticity, and no slippery feeling after washing .

Background technique

In general, in skin cleansing compositions such as facial cleanser, body soap, and hand soap, soap containing alkali salts of higher fatty acids is used as a main component. This soap is excellent in foaming and foam quality, but on the other hand, if it is used in makeup cosmetics containing a large amount of oil components such as foundation, eye makeup products, and lipsticks, the foaming will be greatly deteriorated and the cleaning power will not be exhibited.

Therefore, for the purpose of removing oily components that are oily stains, various cleansing cosmetics that contain a large amount of oily components that are easily fused with oily stains have been proposed. However, conventional cleansing cosmetics contain a large amount of oily components. Oily ingredients also remain on the skin, so you can't get a refreshing feeling. Therefore, after use, a step of washing with a normal cleanser is further required, and this becomes a second wash, which causes problems such as troublesome use and heavy burden on the skin. Therefore, it is strongly desired to develop a skin cleanser capable of effectively removing oily make-up cosmetics with just one wash and providing a refreshing feeling after cleansing.

As such a cleansing material, for example, a cream facial cleanser has been proposed, which is improved by containing soap, carboxybetaine type amphoteric surfactant, anionic surfactant, and polyethylene glycol with an average molecular weight of 1000 to 4000. Slippery feeling at the time of foaming or rinsing (Patent Document 1). In addition, a skin cleansing composition has also been proposed, which contains soap, fatty acid polyethylene glycol ester, and fatty acid ester, thereby providing good foaming and improving foam durability for makeup cosmetics.

Although the above-mentioned cleansing agent has a certain degree of effect on any color cosmetics, in fact, it contains a large amount of ultraviolet absorbers or inorganic substances such as titanium oxide and zinc oxide, and improves the adhesion to the skin compared with ordinary cosmetics. In terms of non-toxic sunscreens, they have poor foaming and unsatisfactory foam performance, so that sufficient effects cannot be obtained.

In order to solve such a problem, a cleanser composition containing polyglyceryl-10 laurate or alkyl glycoside in a cleanser mainly composed of soap has been proposed (Patent Document 3). The cleansing agent composition has good foam quality and foam volume for general color cosmetics, but is not satisfactory for sunscreen agents with insufficient foam volume and foam elasticity, leaving a slippery feeling after rinsing.

As mentioned above, in the prior art, in fact, under the situation that the cleansing agent such as the skin coated with sunscreen is not easy to foam, it is impossible to simultaneously satisfy the fineness of the foam texture, foam volume and foam elasticity and No slippery feeling after rinsing. In addition, skin cleansing compositions such as facial cleanser, body wash, and hand wash are desired to have a moderate viscosity from the viewpoint of ease of handling during use.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2011-213693

Patent Document 2: Japanese Patent Laid-Open No. 2016-193838

Patent Document 3: Japanese Patent Laid-Open No. 2008-094812

Contents of the invention

The technical problem to be solved in the present invention

The present invention solves the above-mentioned technical problems, and its object is to provide a skin cleanser composition that has a moderate viscosity, excellent fineness of the texture of the foam even when it is difficult to foam, and excellent foam volume and foam elasticity. No slippery feel after rinsing.

Technical means to solve technical problems

In order to achieve the above object, the inventors of the present application conducted careful studies and found that, by combining the specific components shown below, a skin cleansing composition having an appropriate viscosity and not prone to foaming can be obtained The fineness of the foam texture is also excellent under the condition of the skin, and the foam volume and foam elasticity are excellent at the same time, and there is no slippery feeling after rinsing.

That is, the skin cleansing composition of the present invention is characterized in that it contains the following (a) component to (d) component, and the content of (a) component is relative to the respective contents of (b) component and (c) component The total mass ratio [a/(b+c)] is 0.1 to 1.0, the mass ratio (d/a) of the content of the component (d) to the content of the component (a) is 0.10 to 0.60,

(a) Fatty acid salt having 8 to 22 carbon atoms: 1 to 30% by mass

(b) Amphoteric surfactant: 1 to 30% by mass

(c) Acyl amino acid type anionic surfactant: 1 to 20% by mass

(d) Polyoxyethylene fatty acid diester type nonionic surfactant represented by formula (1): 1 to 10% by mass

R ¹ -O-(CH ₂ -CH ₂ -O) _n -R ² ······(1)

In the formula, R ¹ and R ² each independently represent an acyl group having 10 to 18 carbon atoms, and n is the average added mole number of ethylene oxide, which represents an integer of 50 to 200.

Invention effect

The skin cleanser composition of the present invention has the effects of having moderate viscosity, excellent fineness of foam texture even when it is difficult to foam, excellent foam volume and foam elasticity, and no slippery feeling after rinsing.

detailed description

Embodiments of the present invention will be described below. The skin cleansing composition of the present invention contains at least each of the above-mentioned (a) to (d) components. It demonstrates sequentially from (a) component.

[(a) ingredient]

The component (a) used in the present invention is a fatty acid salt with 8 to 22 carbon atoms, specifically, a salt of a saturated or unsaturated fatty acid with 8 to 22 carbon atoms and an alkali metal, usually called for soap.

As the alkali metal, potassium and sodium are preferable, and potassium is particularly preferable. The skin cleansing composition of the present invention may be blended with a substance previously prepared as a fatty acid salt, or may be blended with a saturated or unsaturated fatty acid having 8 to 22 carbon atoms and an amount equivalent to the fatty acid. Alkaline agent, thereby generating fatty acid salt in the system of the composition.

The fatty acid may be a single fatty acid or a mixture, and examples include saturated fatty acids such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, arachidic acid, and behenic acid. ; Palmitoleic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid and other unsaturated fatty acids; and coconut oil fatty acid, palm oil fatty acid, palm kernel oil fatty acid, tallow fatty acid, hardened tallow as a mixture of these acids Fatty acids and mixtures of these acids. Among these, lauric acid, myristic acid, palmitic acid, stearic acid, and oleic acid are particularly preferable from the viewpoint of fineness of foam texture and foam elasticity.

In this invention, content of the said (a) component is 1-30 mass % in the composition whole quantity, Preferably it is 9-25 mass %, Especially preferably, it is 10-20 mass %. When the content of the component (a) is too small, the texture of foam or the amount of foam may decrease. When the content of the component (a) is too large, a feeling of tightness after rinsing may be produced.

[(b) ingredient]

The (b) component used in this invention is an amphoteric surfactant, For example, surfactant which has the structure which has N-acyl group or N-alkyl group, a cationic group, and anionic group is mentioned.

Examples of amphoteric surfactants include alkyl betaines, alkylamide betaines, alkylhydroxysultaines, alkylamidehydroxysultaines, and alkylcarboxymethylhydroxyethylimidazolium betaines. , Alkylamide hydroxyethyl amino acid amphoteric surfactant, alkyliminodiacetate, etc.

The N-acyl group contained in the above-mentioned amphoteric surfactant is, for example, a straight-chain or branched fatty acid residue having 8 to 18 carbon atoms. Examples of the fatty acid in the fatty acid residue include saturated fatty acids such as caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid; palmitoleic acid, oleic acid, and elaidic acid , unsaturated fatty acids such as linoleic acid and linolenic acid; and coconut oil fatty acid, palm kernel oil fatty acid, tallow fatty acid, hardened tallow fatty acid, etc. which are mixtures of these acids. Among them, lauric acid, myristic acid, palmitic acid, oleic acid, coconut oil fatty acid, and palm kernel oil fatty acid are preferable. Particular preference is given to lauric acid, coconut oil fatty acid, palm kernel oil fatty acid.

The N-alkyl group contained in the above-mentioned amphoteric surfactant is, for example, a hydrocarbon group having 8 to 18 carbon atoms, and also includes a mixed alkyl group derived from a mixed fatty acid. For example, alkyl groups such as capryl, decanoyl, lauryl, myristyl, palmityl, stearyl, and oleyl; mixed alkyl groups such as coconut oil alkyl, palm kernel oil alkyl, and tallow alkyl are mentioned. Among them, lauryl, myristyl, palmityl, coconut oil alkyl, and palm kernel oil alkyl are preferable. Particular preference is given to lauryl, coconut oil alkyl, palm kernel oil alkyl.

Specific examples of the component (b) include lauryl betaine, coconut oil fatty acid amidopropyl betaine, palm kernel oil fatty acid amidopropyl betaine, lauryl hydroxy sultaine, cocamidopropyl Betaine, Sodium Cocoamphoacetate, etc.

(b) The component can be used 1 type or 2 or more types.

In this invention, content of the said (b) component is 1-30 mass % in the composition whole quantity, Preferably it is 5-25 mass %, Especially preferably, it is 13-23 mass %. When the content of the component (b) is too small, the viscosity of the composition, the texture of the foam, and the amount of foam may decrease. When the content of the component (b) is too large, it may feel slippery after rinsing, and foam elasticity may decrease.

[(c) ingredient]

The component (c) used in the present invention is an acylamino acid-based anionic surfactant having an amino acid salt structure having an N-acyl group. For example, N-acyl-N-methyl-β-alanine salt, N-acyl-β-alanine salt, N-acyl sarcosinate, N-acyl glycinate, etc. are mentioned.

The acyl group is, for example, a group derived from a saturated or unsaturated fatty acid having 6 to 20 carbon atoms, and examples thereof include lauroyl, myristoyl, palmitoyl, stearoyl, and oleoyl. In addition, an acyl group derived from a mixed fatty acid can be used, and examples of the acyl group derived from a mixed fatty acid include a coconut oil fatty acid acyl group, a palm kernel oil fatty acid acyl group, and the like.

Preferable examples of the acyl group include lauroyl group, myristoyl group, coconut oil fatty acid acyl group, palm kernel oil fatty acid acyl group, and the like. Particularly preferred are lauroyl, coconut oil fatty acid acyl, and palm kernel oil fatty acid acyl.

Examples of the counter ion of these acyl amino acids include alkali metal salts, alkaline earth metal salts, ammonium salts, alkanolamine salts, amino acid salts, and the like.

Specific examples of the component (c) include sodium cocoyl methyl taurate, sodium cocoyl methyl taurate taurate, sodium cocoyl glutamate, and lauroyl methyl alanine Sodium Acid, etc. (c) The component can be used 1 type or 2 or more types.

In this invention, content of the said (c)component is 1-20 mass % in the composition whole quantity, Preferably it is 3-18 mass %, Especially preferably, it is 5-15 mass %. When the content of the component (c) is too small, the fineness of the texture of the foam and the elasticity of the foam may decrease. When there is too much content of (c)component, foam volume may fall.

[(d) ingredient]

The component (d) used in the present invention is a polyoxyethylene fatty acid diester type nonionic surfactant represented by formula (1).

R ¹ -O-(CH ₂ -CH ₂ -O) _n -R ² ·····(1)

In the formula, R ¹ and R ² are each independently an acyl group having 10 to 18 carbon atoms. ^The fatty acid constituting R1 and R2 is preferably ^a fatty acid having 10 to 18 carbon atoms, particularly preferably a fatty acid having 12 to 14 carbon atoms. In addition, the fatty acid may be any of saturated, unsaturated, linear, and branched chains, but linear saturated fatty acids are particularly preferred. Furthermore, the fatty acid may be a mixed fatty acid which is a mixture of various fatty acids.

As fatty acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, coconut oil fatty acid etc. are mentioned specifically,. Preference is given to lauric acid, myristic acid, particularly preferably lauric acid.

The esterification rate of R ¹ and R ² is preferably 60 to 97%, particularly preferably 70 to 95%, and even more preferably 80 to 90%. If the esterification ratio is within the above range, sufficient foam elasticity can be obtained.

In this specification, the esterification rate is the ratio of the number of fatty acid ester-bonded hydroxyl groups to the total number of hydroxyl groups in component (d), and refers to the halogenation value (SV), acid value (AV), and hydroxyl value of (d) (OHV) was measured, and the value calculated by the method shown below.

Esterification rate=[(SV-AV)/(SV-AV+OHV)]×100

SV, AV, and OHV were measured based on the method described in Japanese Industrial Standards (JIS).

SV; JIS K-0070 4.1

AV; JIS K-0070 3.1

OHV; JIS K-1557 1

n in formula (1) is the average number of added moles of ethylene oxide, and is an integer of 50-200, preferably 55-150, particularly preferably 60-100.

(d) The component can be used 1 type or 2 or more types.

In this invention, content of the said (d) component is 1-10 mass % in the composition whole quantity, Preferably it is 2-8 mass %, Especially preferably, it is 4-6 mass %. When the content of the component (d) is too small, the viscosity of the composition may decrease, resulting in poor usability, and further, the fineness of the foam texture, foam volume, and foam elasticity may decrease. When the content is too large, a slippery feeling may be produced after rinsing.

In the present invention, the mass ratio [a/(b+c)] of the content of the component (a) to the total content of the components (b) and (c) is in the range of 0.1 to 1.0, preferably 0.3 to 1.0, particularly preferably 0.50 to 0.95, more preferably 0.60 to 0.90. If the mass ratio is too small, the fineness, foam volume, and foam elasticity of the foam may decrease, and if the mass ratio is too large, the foam may feel slippery after rinsing.

In addition, the mass ratio (d/a) of the content of the component (d) to the content of the component (a) is in the range of 0.10 to 0.60, preferably in the range of 0.20 to 0.40, particularly preferably in the range of 0.25 to 0.30 . When this mass ratio is too small, the amount of foam may decrease, and it may feel slippery after rinsing. If the mass ratio is too large, the viscosity of the composition may decrease, resulting in poor usability, and further, the texture of the foam, the amount of foam, and the elasticity of the foam may decrease.

The skin cleansing composition of the present invention contains a solvent in addition to the above-mentioned components (a) to (d). Examples of the solvent include water, lower alcohols, and lower alcohol aqueous solutions. As water, purified water, ion-exchanged water, distilled water, RO water, tap water, industrial water etc. are mentioned, for example. As a lower alcohol, ethanol, 2-propanol, ethylene glycol, etc. are mentioned, for example. Among these solvents, water such as purified water is particularly preferable.

The solvent is used in an amount adjusted to a predetermined amount of each component of (a) to (d) and other components that may be contained arbitrarily. Specifically, the content of the solvent in the present invention is 10 to 70% by mass, preferably 20 to 60% by mass, particularly preferably 30 to 50% by mass, in the total amount of the composition.

The skin cleansing composition of the present invention can be prepared according to a usual method. For example, firstly, potassium hydroxide is mixed with fatty acid so that the neutralization rate is 98 to 99%, thereby preparing fatty acid potassium salt of component (a), and then amphoteric surfactant of component (b), amphoteric surfactant of component (c) ) component anionic surfactant and (d) component polyoxyethylene fatty acid diester nonionic surfactant, and then use citric acid to adjust the pH to weak alkaline, such as pH 9.0 to 9.5, thus preparing the present invention Invented skin cleanser composition.

The skin cleanser composition of the present invention can be used as face wash, body wash, hand wash, and the like. In particular, the skin cleansing composition of the present invention foams well even for color cosmetics and sunscreens, and has no slippery feeling after rinsing, so it can be suitably used as a cleanser.

The skin cleansing composition of the present invention may further contain additives commonly used in skin cleansing agents in addition to the above-mentioned components within the range not impairing the effect of the present invention.

Example

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.

The skin cleansing composition shown in Table 1 and Table 2 was prepared and evaluated by the following method.

In addition, in Table 1 and Table 2, the numerical value of each component shows the mass ratio (mass %) of each component. In addition, [a/(b+c)] represents the mass ratio of the content of component (a) to the total of the respective contents of component (b) and component (c), and (d/a) represents the content of component (d) Mass ratio with respect to content of (a) component. In addition, the content of each component is the content converted into active ingredients, not the content of commercially available raw materials themselves.

Furthermore, the numerical value of "E.O." of (d) component and (d') component is n (average addition mole number of ethylene oxide) in formula (1). In addition, the lauric acid residue is a straight-chain acyl group with 12 carbon atoms, the myristic acid residue is a straight-chain acyl group with 14 carbon atoms, and the stearic acid residue is a straight-chain acyl group with 18 carbon atoms. Acyl.

The esterification rate (%) of (d) component and (d') component is as follows.

Polyethylene glycol dilaurate (70E.O.): 85%

Polyethylene glycol dimyristate (70E.O.): 60%

Polyethylene glycol distearate (150E.O.): 97%

Polyethylene glycol dilaurate (12E.O.): 70%

Polyethylene glycol stearate (55E.O.): 38%

(1) Thickening effect

Using a B-type viscometer (manufactured by TOKIMEC), the viscosity of each skin cleansing composition at 25° C. was measured with a measurement time of 100 seconds, and evaluated in the following three ranks. In addition, "(circle)" was evaluated as pass.

○: 500mPa·s or more

△: 200～499mPa·s

×: below 199mPa·s

(2) The fineness of the texture of the foam

With 20 females (25 years old to 43 years old) as participants (paneler), apply commercially available BB (Blemish Balm) cream (SPF (Sun Protection on Factor) as a sunscreen agent with a diameter of about 2 cm on the left forearm. ); 35, PA++), after wiping off the excess, use 0.5g of the skin cleanser composition to massage for 30 seconds to blend it with the BB cream. Then, the right hand was wetted with water, and the massaged part was rubbed back and forth 50 times with the right hand, and the texture fineness of the foam at the time of foaming was evaluated as follows.

2 points: When the texture of the foam is felt to be very delicate;

1 point: When the texture of the foam feels a little delicate;

0 points: When the texture of the foam is felt rough.

(3) Amount of foam

20 women (25 to 43 years old) were tested, and a BB cream (SPF; 35, PA++) commercially available as a sunscreen with a diameter of about 2 cm was applied to the left forearm, and the excess was wiped off. , Massage 0.5g of the skin cleanser composition for 30 seconds to blend it with the BB cream. Then, the right hand was wetted with water, and the massaged part was rubbed back and forth 50 times with the right hand, and the amount of foam at the time of foaming was evaluated as follows.

2 points: When it feels that a large amount of foam is formed, and the foam does not disappear until the end of washing;

1 point: It feels that the amount of foam is slightly large, and some foam remains at the end of washing;

0 points: When the amount of foam is felt to be small, and almost no foam remains at the end of washing.

(4) Foam elasticity

20 women (25 to 43 years old) were tested, and a BB cream (SPF; 35, PA++) commercially available as a sunscreen with a diameter of about 2 cm was applied to the left forearm, and the excess was wiped off. , Massage 0.5g of the skin cleanser composition for 30 seconds to blend it with the BB cream. Then, the right hand was wetted with water, and the massaged part was rubbed 50 times with the right hand, and the foam elasticity at the time of foaming was evaluated as follows.

2 points: when it feels like it has foam elasticity;

1 point: When feeling a little foam elasticity;

0 points: When no foam elasticity is felt.

(5) Slippery feeling after washing

20 women (25 to 43 years old) were tested, and a BB cream (SPF; 35, PA++) commercially available as a sunscreen with a diameter of about 2 cm was applied to the left forearm, and the excess was wiped off. , Massage 0.5g of the skin cleanser composition for 30 seconds to blend it with the BB cream. Then, wet the right hand with water, rub the massaged part back and forth 50 times with the right hand, and make foam. Finally, the slippery feeling after rinsing with running water for 5 seconds was evaluated as follows.

2 points: when there is no slippery feeling;

1 point: When it feels slightly slippery;

0 points: When feeling slippery.

The above-mentioned (2)-(5) were respectively evaluated by the following criteria, and are shown in Table 1 and Table 2, respectively. In addition, "⊚" and "◯" were evaluated as pass.

◎: The total score is 35 points or more

○: The total score is more than 30 points and less than 35 points

△: The total score is more than 25 points and less than 30 points

×: The total score is less than 25 points

(Evaluation results)

The skin cleansing compositions of Examples 1 to 6 of the present invention all have moderate viscosity, and even under the condition that it is difficult to foam, the texture of the foam is excellent, and at the same time, the amount of foam and the elasticity of the foam are excellent, and the foam after rinsing is excellent. Excellent non-slippery feeling.

On the other hand, the skin cleansing composition of Comparative Examples 1-9 did not acquire sufficient performance.

In Comparative Example 1, since the component (b) was not contained, an appropriate viscosity could not be obtained, the fineness of the foam texture decreased, and the amount of foam was insufficient.

In Comparative Example 2, since the component (c) was not contained, the elasticity of the foam was lowered, and the texture of the foam was insufficient.

In Comparative Example 3, since the component (d) was not contained, an appropriate viscosity could not be obtained, the fineness of the foam texture and the foam volume decreased, and the foam elasticity was insufficient.

In Comparative Example 4, since the diester-type nonionic surfactant having an average added mole number of ethylene oxide of 12 was blended instead of the component (d), the amount of foam decreased and the foam elasticity was insufficient.

In comparative example 5, due to containing the (b) component exceeding the upper limit value of the specified range of the present invention, and blending the average addition mole number of ethylene oxide is a monoester type nonionic surfactant of 55 to replace (d ) ingredients, so the appropriate viscosity cannot be obtained, the foam elasticity decreases, and it feels slippery after rinsing.

In Comparative Example 6, since component (c) was contained beyond the upper limit specified by the present invention, and polyethylene glycol 4000 was blended instead of component (d), moderate viscosity could not be obtained, and it felt slippery after rinsing , the fineness of the foam texture decreases, and the foam volume and foam elasticity are not sufficient.

In Comparative Example 7, since polyglyceryl-10 laurate was blended instead of the component (d), an appropriate viscosity was not obtained, and it felt slippery after rinsing, and the foam volume decreased, and the foam elasticity was insufficient.

In Comparative Example 8, since the mass ratio [a/(b+c)] exceeded the upper limit of the specified range of the present invention, the foam volume and foam elasticity decreased, and the texture of the foam was insufficient.

In Comparative Example 9, since the mass ratio (d/a) was lower than the lower limit of the range specified in the present invention, the fineness of the foam texture and the amount of foam decreased, and the foam elasticity was insufficient.

The skin cleansing composition of Examples 7-10 was prepared using the said (d) component: polyethylene glycol dilaurate (70E.O.) and the component shown in Tables 3-6.

Moreover, among the various components shown in Tables 3-6, the component corresponding to (a) component - (c) component of this invention is shown below.

(a) Ingredients: potassium laurate, potassium myristate, potassium palmitate, potassium stearate

(b) Ingredients: Cocamidopropyl Betaine, Sodium Cocoamphoacetate

(c) Ingredients: sodium N-cocoyl-N-methyl taurate, sodium N-lauroyl-N-methyl-β-alanine

[Example 7: transparent body wash]

The composition shown in Table 3 was mixed at 80° C. to obtain a skin cleansing composition (transparent body wash). The skin cleansing composition has an appropriate viscosity, excellent fineness of the foam even when it is difficult to foam, excellent foam volume and foam elasticity, and no slippery feeling after rinsing.

In addition, the mass ratio [a/(b+c)] of this skin cleansing composition was 0.91, and the mass ratio (d/a) was 0.20.

[table 3]

Composition (mass%) Polyethylene glycol dilaurate (70E.O.) 2.00 potassium laurate 5.00 Potassium myristate 3.00 Potassium palmitate 1.00 Potassium stearate 1.00 Cocamidopropyl Betaine 6.00 Sodium N-cocoyl-N-methyl taurate 5.00 Cocamide MEA 0.50 Polyquaternium-51 0.05 Glycerol 5.00 EDTA-2Na 0.01 Hydroxyethyl cellulose 0.50 spices 0.05 water The remaining part total 100

[embodiment 8: pearlescent body wash]

The composition shown in Table 4 was mixed at 80° C. to obtain a skin cleansing composition (pearl-like body wash). The skin cleansing composition has an appropriate viscosity, excellent fineness of the foam even when it is difficult to foam, excellent foam volume and foam elasticity, and no slippery feeling after rinsing.

In addition, the mass ratio [a/(b+c)] of this skin cleansing composition was 0.80, and the mass ratio (d/a) was 0.33.

[Table 4]

Composition (mass%) Polyethylene glycol dilaurate (70E.O.) 4.00 Potassium myristate 10.00 Potassium palmitate 2.00 Cocamidopropyl Betaine 6.00 Sodium N-cocoyl-N-methyl taurate 9.00 Polyquaternium-7 0.50 Propylene Glycol Laurate 1.00 Glycerol 20.00 EDTA-2Na 0.01 Ethylene glycol distearate 2.00 spices 0.05 water The remaining part total 100

[Example 9: Paste facial cleanser]

The composition shown in Table 5 was mixed at 80° C. to obtain a skin cleansing composition (cream face cleanser). The skin cleansing composition has an appropriate viscosity, excellent fineness of the foam even when it is difficult to foam, excellent foam volume and foam elasticity, and no slippery feeling after rinsing.

In addition, the mass ratio [a/(b+c)] of this skin cleansing composition was 1.0, and the mass ratio (d/a) was 0.17.

[table 5]

Composition (mass%) Polyethylene glycol dilaurate (70E.O.) 4.00 potassium laurate 2.00 Potassium myristate 14.00 Potassium palmitate 4.00 Potassium stearate 4.00 Sodium Cocoamphoacetate 8.00 Sodium N-cocoyl-N-methyl taurate 16.00 Polyquaternium-7 0.50 PPG-52 butyl ether 3.00 Glycerol 25.00 EDTA-2Na 0.01 Ethylene glycol distearate 2.00 spices 0.05 water The remaining part total 100

[Embodiment 10: Pressure pump foaming type foam cleaning material]

The composition shown in Table 6 was mixed at 80° C. to obtain a skin cleansing composition (pump-foaming foam cleansing material). The skin cleansing composition has an appropriate viscosity, excellent fineness of the foam even when it is difficult to foam, excellent foam volume and foam elasticity, and no slippery feeling after rinsing.

In addition, the mass ratio [a/(b+c)] of this skin cleansing composition was 1.0, and the mass ratio (d/a) was 0.50.

[Table 6]

Composition (mass%) Polyethylene glycol dilaurate (70E.O.) 2.00 potassium laurate 2.00 Potassium myristate 2.00 Cocamidopropyl Betaine 1.00 Sodium N-lauroyl-N-methyl-β-alanine 3.00 Glycerol 10.00 Sodium citrate 0.02 citric acid 0.05 EDTA-2Na 0.01 water The remaining part total 100

Claims (1)

1. A cleansing composition for skin, characterized by comprising the following components (a) to (d), wherein the mass ratio [ a/(b + c) ] of the content of component (a) to the total content of components (b) and (c) is 0.1 to 1.0, the mass ratio (d/a) of the content of component (d) to the content of component (a) is 0.10 to 0.60,

(a) Fatty acid salts having 8 to 22 carbon atoms: 1 to 30 mass%

(b) Amphoteric surfactant: 1 to 30 mass%

(c) Acylamino acid type anionic surfactant: 1 to 20 mass%

(d) A polyoxyethylene fatty acid diester-type nonionic surfactant represented by formula (1): 1 to 10 mass%

R ¹ -O-(CH ₂ -CH ₂ -O) _n -R ² ······(1)

In the formula, R ¹ And R ² Each represents an acyl group derived from lauric acid, and n is the average molar number of addition of ethylene oxide and is an integer of 60 to 100.