JP2013139439A - Skin cleansing agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin cleansing agent composition which materializes fine foam quality with excellent elasticity and skin with a moist feeling and without stiffness after finishing of washing.SOLUTION: The skin cleansing agent composition contains: (A) 1 to 20 mass% of alkyl ether carboxylic acids represented by general formula (1) (in formula, Rrepresents a 4-22C alkyl group, and n represents a number from 0 to 20), wherein the average number of carbon atoms in Ris 10.8 to 12.8, the content of components in which n=0 is 4.3 to 30 mass%, and the total content of components in which n=1 and components in which n=2 is at least 20 mass% and less than 40 mass%; (B) 1 to 20 mass% of a straight chain or branched chain 10-22C fatty acids; (C) 0.1 to 5 mass% of a cationic polymer; (D) a base; and (E) water. At least a part of the component (A) and a part of the component (B) are present in the form of salts with the component (D), and a molar ratio of the component (D) relative to the component (A) and the component (B) (component (D))/(component (A)+component (B)) is 0.9 to 1.1.

Description

  The present invention relates to a skin cleansing composition.

  In recent years, body cleansing agents are required to be gentle on the skin. In particular, with regard to foam during washing, some consumers believe that continuing to wash with friction with rough, non-elastic foam will cause skin problems such as dry skin, spots and wrinkles. Along with the increase, there is a need for a detergent that can provide more elastic foam.

  One of the cleaning agents that are considered to obtain elastic foam is a paste-like cleaning agent in which fatty acids are crystallized. Patent Document 1 discloses a combination of a fatty acid and a cationic polymer.

  Moreover, in order to give elasticity to the foam, a combination of an anionic surfactant and a specific nonionic surfactant to strengthen the foam film (Patent Document 2), a specific fatty acid salt and another surfactant are combined. Thus, attempts have been made to form a homogeneous and creamy foam (Patent Document 3).

JP 2011-20941 A JP 2008-150303 A JP-A-11-35972

The paste-like cleaning agent crystallized with fatty acid as in Patent Document 1 requires a large amount of fatty acid, and as a feeling of use after cleaning, it tends to give a feeling of tension and dryness, and may not be preferred by some people. is there. On the other hand, a combination of an anionic surfactant and a specific nonionic surfactant as in Patent Document 2 or a combination of a fatty acid salt and another surfactant as in Patent Document 3 forms a creamy foam. There is a problem that the elasticity of bubbles is weakened.
The present invention relates to a skin cleanser composition having fine foam quality, excellent elasticity, and moisturized skin and a reduced feeling of tension.

  When the present inventor uses a combination of a specific alkyl ether carboxylic acid, a specific fatty acid and a cationic polymer, the foam quality is fine and excellent in elasticity, and the washed-out skin is moist and the feeling of tension is suppressed. It was found that a skin cleansing composition was obtained.

The present invention includes the following components (A), (B), (C), (D) and (E):
(A) General formula (1)

(In the formula, R ¹ represents an alkyl group having 4 to 22 carbon atoms, and n represents a number of 0 to 20).
Wherein R ^{1 has} an average carbon number of 10.8 to 12.8, 4.3 to 30% by mass of n = 0, and n = 1 1-20% by mass of an alkyl ether carboxylic acid having a total content of n = 2 components of 20% by mass or more and less than 40% by mass,
(B) General formula (2)

(Wherein R ² represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms)
1 to 20% by mass of a fatty acid represented by
(C) Cationic polymer 0.1-5% by mass,
(D) a base,
(E) It contains water, and components (A) and (B) are at least partially present as component (D) and salt, and component (D) is a molar ratio of components (A) and (B) ( It is related with the skin cleansing composition whose component (D) / (component (A) + component (B)) is 0.9-1.1.

  The skin cleanser composition of the present invention has a fine foam quality and excellent elasticity, and the washed-out skin is moist and the feeling of tension is suppressed. In the present invention, the feeling of tension is a feeling that the surface of the skin is pulled after washing, for example, after towel drying.

The alkyl ether carboxylic acid of component (A) used in the present invention is represented by the general formula (1).
In the formula, R ¹ is an alkyl group having 4 to 22 carbon atoms, preferably an alkyl group having 6 to 20 carbon atoms, further an alkyl group having 8 to 18 carbon atoms, and more preferably an alkyl group having 8 to 16 carbon atoms. An alkyl group of several 10 to 16 is more preferable. The alkyl chain of R ¹ may be either a straight chain or a branched chain, but a straight chain alkyl group is preferred from the viewpoint of foamability. R ^{1 has} an average carbon number of 10.8 to 12.8, preferably 10.8 to 12.5, and more preferably 12.1 to 12.4. If it is in this range, it is excellent in terms of foamability and foam quality, and stability at low temperature, which is preferable.
R ¹ preferably contains two or more alkyl groups, and the component having the largest alkyl chain length is preferably 55% by mass or more and less than 97% by mass, and 60 to 95% by mass. More preferably, it is preferably 70 to 95% by mass because the foam amount and foam quality are excellent.

Moreover, in formula, n shows the number of 0-20, and 0-12 are more preferable. In addition, n shows the addition mole number of ethylene oxyoxide, and the average addition mole number (average value of n) in the composition of a component (A) is 1.5-10 from the point that foam quality is favorable. Preferably, 2.5 to 4.5 is more preferable, 2.5 to 3.4 is more preferable, 2.8 to 3.4 is more preferable, and 2.8 to 3.1 is more preferable.
In the general formula (1), the alkyl ether carboxylic acid of the component (A) includes 4.3 to 30% by mass of the component of n = 0, preferably 4.9 to 27% by mass, and 9.6 to 27% by mass. Is more preferable, 9.9-16 mass% is still more preferable, and it is still more preferable to contain 9.9-15 mass%. By making it within this range, the squeaky feeling at the time of rinsing is improved.
Furthermore, the total content of the component of n = 1 and the component of n = 2 is 20% by mass or more and less than 40% by mass, and preferably 20 to 37% by mass, more preferably 27 from the viewpoint of foam quality and foam amount. It is -36.5 mass%, More preferably, it is 35-36.1 mass%.

  In the general formula (1), the component (A) alkyl ether carboxylic acid has a mass ratio of components of n = 0, 1, 2, 3, and 4 (n = 0 component mass): (n = 1 component) Mass): (mass of n = 2 components): (mass of n = 3 components): (mass of n = 4 components) = 1: 0.99 to 3.50: 0.89 to 3.00: 0 .76 to 3.00: 0.63 to 1.6 is preferable from the viewpoint of compatibility between foamability, detergency, and squeaky feeling during rinsing.

  Furthermore, in general formula (1), the component of n = 0 is contained 9.6 mass% or more and less than 12 mass%, (mass of n = 0 component) :( mass of n = 1 component) :( n = 2 Component mass): (n = 3 component mass): (n = 4 component mass) = 1: 1.53-1.87: 1.59-2.25: 1.33-2.16: 1 .14 to 1.52, or 12 to 17% by mass of n = 0 component, (n = 0 component mass): (n = 1 component mass): (n = 2 Component mass): (n = 3 component mass): (n = 4 component mass) = 1: 0.99 to 1.34: 0.89 to 1.40: 0.76 to 1.23: 0 .63 to 0.99 is preferable from the viewpoint of foaming properties and rinsing properties.

  Further, in the general formula (1), the component of n = 0 is included in the range of 9.9 to 11.5% by mass, (the mass of the n = 0 component): (the mass of the n = 1 component): (the n = 2 component) Mass): (mass of n = 3 components): (mass of n = 4 components) = 1: 1.58-1.84: 1.72-2.17: 1.49-2.00: 1.14 To 1.52 or, in the general formula (1), 13 to 17% by mass of n = 0 component, (n = 0 component mass): (n = 1 component mass): (n = Mass of 2 components) :( mass of n = 3 components) :( mass of 4 components) = 1: 1.00 to 1.31: 0.93 to 1.34: 0.79 to 1.18 : 0.63 to 0.99 is preferable from the viewpoints of the amount of foam, foam quality and rinsing properties.

In the component (A), in the general formula (1), R ¹ is an alkyl group having 4 to 22 carbon atoms, the average carbon number of R ¹ is 10.8 to 12.8, and the most content The component having a large alkyl chain length is 55% by mass or more and less than 97% by mass, n represents a number of 0 to 20, the average value is 1.5 to 10, and the component of n = 0 It is preferable that the total content of the component of n = 1 and the component of n = 2 is 20-37 mass% including 4.9-27 mass%. By doing in this way, foamability can be accelerated.

In the component (A), in the general formula (1), R ¹ is an alkyl group having 6 to 20 carbon atoms, and the average carbon number of R ¹ is 10.8 to 12.8. The component having a large alkyl chain length is 55% by mass or more and less than 97% by mass, n represents a number of 0 to 20, an average value is 2.5 to 4.5, and n = 0. It is preferable that a component is contained 9.6-27 mass%, and the sum total content of the component of n = 1 and the component of n = 2 is 27-36.5 mass%. By doing in this way, foamability can be accelerated.

In the component (A), in the general formula (1), R ¹ is an alkyl group having 8 to 18 carbon atoms, the average carbon number of R ¹ is 10.8 to 12.8, and the most content The component having a large alkyl chain length is 55% by mass or more and less than 97% by mass, n represents a number of 0 to 20, an average value is 2.5 to 3.4, and n = 0. It is preferable that a component is contained 9.6-27 mass%, and the sum total content of the component of n = 1 and the component of n = 2 is 27-36.5 mass%. By doing in this way, the stop feeling property at the time of a rinse can be strengthened.

In the component (A), in the general formula (1), R ¹ is an alkyl group having 8 to 16 carbon atoms, the average carbon number of R ¹ is 10.8 to 12.5, and the most content The component having a large alkyl chain length is 60 to 95% by mass, n represents a number of 0 to 20, the average value is 2.8 to 3.4, and the component of n = 0 is 9 It is preferable that the total content of the component of n = 1 and the component of n = 2 is 27 to 36.5% by mass, including 6.6 to 27% by mass, preferably 9.9 to 16% by mass. By doing in this way, foam amount and foam quality can be improved.

In the component (A), in the general formula (1), R ¹ is an alkyl group having 10 to 16 carbon atoms, the average carbon number of R ¹ is 12.1 to 12.4, and the most content The component having a large alkyl chain length is 60 to 95% by mass, n represents a number of 0 to 20, the average value is 2.8 to 3.1, and the component of n = 0 is 9 It is preferable that the total content of the component of n = 1 and the component of n = 2 is 35 to 36.1% by mass. By doing in this way, the amount of foam, foam quality, and the difficulty of dripping can be improved.

Incidentally, in the components of the present invention (A), the distribution of alkyl chain length of R ^1, the average alkyl chain length of R ^1, components of n = 0, average addition mole number of n, n = 0, 1, 2, The mass ratio of the components 3 and 4 is determined as follows by analyzing the alkyl ether carboxylic acid represented by the general formula (1) by gas chromatography.

[Distribution of alkyl chain length of R ¹ ]
Of the peak areas obtained by gas chromatography, the peak area of each alkyl chain length corresponding to n = 0 mol was determined, and the sum of these was determined as 100, and the percentage of each alkyl chain length distribution was determined. also calculated similarly in n = 1 to 3 mol, and the average value of the percentage of each alkyl chain length distribution of n = 0 to 3 mol, determined the distribution of alkyl chain length of R ¹ (from which, R ¹ The alkyl group component containing the largest amount of the composition can be specified).

[Average alkyl chain length of R ¹ ]
From the distribution of the alkyl chain length of R ¹ determined as described above, the ratio of each component was determined, and the carbon number corresponding to the alkyl chain length corresponding to the ratio thus obtained was multiplied to obtain the sum of these. This was defined as the average alkyl chain length.

[Component content of n = 0, total content of component of n = 1 and component of n = 2]
Among the compositions of R ¹ , the most abundant alkyl chain length was specified, and the areas of gas chromatography corresponding to n = 0 to 10 of the components were totaled. The total amount was 100%, and the total content of n = 0, n = 1 and n = 2 was calculated.

[Average number of moles of n added]
The most alkyl chain length contained in the composition of R ¹ was specified, and the areas of the gas chromatography corresponding to n = 0 to 10 of the components were totaled (the ones with n of 11 or more are trace amounts. Excluded). The total amount was set to 1, and the ratio of each of n = 0 to 10 was obtained. This ratio was multiplied by the number of moles added, and the sum of these was taken as the average number of moles added.

[Mass ratio of components of n = 0, n = 1, n = 2, n = 3, n = 4]
Regarding the ratio of each component having a different number of EO addition moles, the distribution of the alkyl chain length of R ¹ is obtained from the peak area obtained by gas chromatography by the method described above, and the maximum content of the R ¹ composition is determined. The alkyl chain length component was identified, and the maximum component was identified from the area ratio of n = 0, n = 1, n = 2, n = 3, and n = 4.

  The alkyl ether carboxylic acid of component (A) has the composition as described above. From the viewpoint of suppressing the feeling of sticking while obtaining a sufficient amount of foam at the time of washing and good foam quality, 1 in the total composition. It is contained in an amount of not less than 5% by mass, preferably not less than 5% by mass, and more preferably not less than 6% by mass. Further, the content of the component (A) is preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 12% by mass or less in the entire composition. Moreover, it is preferable to contain 1-20 mass% of components (A) in the whole composition, 2-15 mass% is more preferable, Furthermore, it is preferable that 4-12 mass% is contained. In addition, a component (A) can express the above effect, when a part or all forms a salt by a component (D).

The fatty acid of component (B) used in the present invention is represented by the general formula (2).
In the formula, R ² is an alkyl group or alkenyl group having 9 to 21 carbon atoms, which may be linear or branched, more preferably an alkyl group having 11 to 21 carbon atoms, and further an alkyl group having 13 to 17 carbon atoms. Groups are preferred.
As the component (B), myristic acid, palmitic acid, stearic acid or behenic acid is preferable.

Moreover, in the fatty acid of the component (B), in the general formula (2), the fatty acid which is an alkyl group or alkenyl group having 15 to 21 carbon atoms in R ² is preferably 40 to 40 in the total fatty acid of the component (B). The content of 100% by mass, more preferably 50-80% by mass, is preferable from the viewpoint of making the texture of the foam finer and suppressing the feeling of tension.

  Component (B) can be used singly or in combination of two or more, and from the viewpoint of obtaining detergency and foamability, it is contained in an amount of 1% by mass or more, preferably 5% by mass or more, Is preferably 6% by mass or more. In addition, the content of the component (B) in the total composition is preferably 20% by mass or less, more preferably 15% from the viewpoint of coexistence of foam elasticity and suppression of the feeling of tension and ease of foaming due to the viscosity of the composition. It is not more than mass%, and more preferably 12 mass%. Moreover, it is preferable to contain 1-20 mass% of components (B) in the whole composition, 5-15 mass% is more preferable, Furthermore, it is preferable to contain 6-12 mass%.

  In the skin cleanser composition of the present invention, the total content of components (A) and (B) is preferably 2 to 40% by mass in the total composition from the viewpoint of obtaining more elastic foam, 5-30 mass% is more preferable, and it is further preferable that it is 10-30 mass%.

Moreover, in the skin cleansing composition of the present invention, by mixing the components (A) and (B), the solubility of the component (B) is increased, and the component (B) is added to the foam film formed by the component (A). It is considered that the orientation can be improved. As a result, a fine foam quality can be obtained. In particular, the mass ratio of the components (A) and (B) as the acid is preferably (A) / (B) = 0.3 to 5 from the viewpoint of improving the elasticity of the foam and suppressing the stickiness. More preferably, it is 0.5-2, and it is still more preferable that it is 0.5-1.5.
Furthermore, in the component (A) and the component (B), in the general formula (2), the mass ratio as the acid of the fatty acid (component (B-1)) in which R ² is an alkyl group having 15 to 21 carbon atoms is (A) / (B-1) = 0.2-5 is preferable, 0.3-3.5 is more preferable, and 0.3-3.5 from the point which improves the elasticity of a bubble and suppresses a twitching feeling. 2 is more preferable, and 0.4 to 2 is even more preferable.

Examples of the cationic polymer of component (C) used in the present invention include, for example, cationized cellulose, cationized starch, cationized guar gum, cationized cod gum, cationized locust bean gum, cationized fenugreek gum, cationized xanthan gum, diallyldialkyl quaternary. Polymer of quaternary ammonium salt, diallyldialkyl quaternary ammonium salt / acrylamide copolymer, diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer, vinylimidazolium trichloride / vinyl pyrrolidone copolymer, hydroxyethyl cellulose / dimethyl Diallylammonium chloride copolymer, vinylpyrrolidone / quaternized dimethylaminoethyl methacrylate copolymer, polyvinylpyrrolidone / alkylaminoacrylate copolymer Polymer, polyvinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer, vinylpyrrolidone / methacrylamideamidopropyltrimethylammonium chloride copolymer, alkylacrylamide / acrylate / alkylaminoalkylacrylamide / polyethylene glycol methacrylate copolymer, adipic acid / dimethylamino Examples thereof include hydroxypropylethylenetriamine copolymer (Sandos Corp., Cartaletin), and cationic polymers described in JP-A-53-139734 and JP-A-60-36407.
Of these, from the viewpoint of obtaining elastic foam, diallyldialkyl quaternary ammonium salt / acrylamide copolymer, diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer, cationized guar gum, and cationized cellulose are selected. One type or two or more types are preferred.

  Component (C) can be used in one or more kinds, and from the viewpoint of obtaining more elastic foam, it is contained in an amount of 0.1% by mass or more, preferably 0.5% by mass or more, Preferably it contains 5 mass% or less, More preferably, it contains 2 mass% or less. Moreover, it is preferable that content of a component (C) is 0.1-5 mass% in the whole composition, and it is further preferable that it is 0.5-2 mass%.

  Examples of the base of component (D) used in the present invention include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; ammonia; organic amine compounds such as triethanolamine; and basic amino acids such as arginine. Can be mentioned. Among these, alkali metal hydroxides are preferable from the viewpoint of stability, and potassium hydroxide is preferable from the viewpoint of liquidity adjustment.

In the present invention, components (A) and (B) are at least partially present as component (D) and a salt.
Component (D) has a molar ratio (component (D) / (component (A) + component (B)) to components (A) and (B) of 0.9 to 1.1, preferably 0. It is contained so that it may become 0.95-1.05.By using in this way, a more elastic foam can be obtained.

  The skin cleansing composition of the present invention can further contain component (E) water as a solvent. Water is preferably contained in the total composition in an amount of 10% by mass or more, preferably 15% by mass or more, more preferably 30% by mass or more, preferably 96% by mass or less, more preferably 90% by mass or less, 87 mass% or less is still more preferable, and 85 mass% or less is still more preferable. Further, water can be contained in the total composition, preferably 10 to 96% by mass, more preferably 15 to 90% by mass, and still more preferably 30 to 87% by mass, and the component constituting the cleaning composition. And the balance of other components.

  Since the skin cleanser composition of the present invention contains components (A) to (E), the texture of the foam can be made fine and the elasticity of the foam can be improved, so that the skin is not easily damaged during washing. It is possible to enhance the feel and high cleaning feeling, and to suppress the feeling of tension.

The skin cleansing composition of the present invention can further contain (F) a polyol, and can further improve the feeling that the washed-out skin is moist and not sticking.
Examples of such polyols include sorbitol, glycerin, butylene glycol, propylene glycol, dipropylene glycol, erythritol, mannitol, xylitol and the like. Of these, glycerin and sorbitol are preferred from the viewpoint of the skin feel that the washed-up skin is moist and not sticky and the elasticity of the foam.

  As the component (F) polyol, one or more types can be used, and from the viewpoint of the skin feel after washing, the total composition preferably contains 1% by mass or more, more preferably 5% by mass or more, The content is preferably 40% by mass or less, and more preferably 30% by mass or less. Moreover, it is preferable to contain 1-40 mass% in a whole composition, and, as for a component (F), it is more preferable to contain 5-30 mass%.

  The skin cleanser composition of the present invention further comprises components used in ordinary cleansing agents, for example, surfactants other than components (A) and (B), moisturizers, oily components, bactericides, anti-inflammatory agents, Preservatives, chelating agents, thickeners, salts other than component (D), pearling agents, scrub agents, fragrances, cooling agents, dyes, ultraviolet absorbers, antioxidants, plant extracts, etc. .

The skin cleansing composition of the present invention is produced by mixing the compounding ingredients by a usual method. The obtained detergent composition may be either liquid or solid, but when it is liquid, the viscosity when measured with a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at 25 ° C. is 200 to 80,000 mPa · s. It is preferable that it can be adjusted by appropriately selecting the blending components.
Moreover, it is preferable that pH is 3-12, 5-10.5 is more preferable, and it is still more preferable that it is 5-7. In addition, the measurement of pH is a value obtained by diluting each cleaning composition 20 times with ion-exchanged water at 25 ° C.

The skin cleansing composition of the present invention is suitable as, for example, a facial cleanser, body soap, hand soap, etc., and a facial cleanser and body soap are preferred.
The method for washing the skin using the skin cleansing composition of the present invention is, for example, as follows. That is, the skin cleansing composition of the present invention is a method of applying an appropriate amount to the body, that is, the body skin such as the face, limbs, and torso, washing with foaming, and then rinsing using warm water such as a shower. Moreover, it can also wash | clean more effectively by applying a suitable amount to washing aids, such as a resin towel, resin sponge, and a brush, and using it lathering.
The present invention further discloses the following compositions, methods and uses with respect to the above-described embodiments.

<1> The following components (A), (B), (C), (D) and (E):
(A) General formula (1)

(In the formula, R ¹ represents an alkyl group having 4 to 22 carbon atoms, and n represents a number of 0 to 20).
Wherein R ^{1 has} an average carbon number of 10.8 to 12.8, 4.3 to 30% by mass of n = 0, and n = 1 1-20% by mass of an alkyl ether carboxylic acid having a total content of n = 2 components of 20% by mass or more and less than 40% by mass,
(B) General formula (2)

(Wherein R ² represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms)
1 to 20% by mass of a fatty acid represented by
(C) Cationic polymer 0.1-5% by mass,
(D) a base,
(E) It contains water, and components (A) and (B) are at least partially present as component (D) and salt, and component (D) is a molar ratio of components (A) and (B) ( Skin cleanser composition whose component (D) / (component (A) + component (B)) is 0.9-1.1.

<2> In the component (A), in the general formula (1), R ¹ is an alkyl group having 4 to 22 carbon atoms, an alkyl group having 6 to 20 carbon atoms, an alkyl group having 8 to 18 carbon atoms, and Is preferably an alkyl group having 8 to 16 carbon atoms, more preferably an alkyl group having 10 to 16 carbon atoms, and the alkyl chain of R ¹ may be either linear or branched, but is preferably a linear alkyl group. The skin cleansing composition according to <1>.
<3> In the component (A), in the general formula (1), the average carbon number of R ¹ is 10.8 to 12.8, preferably 10.8 to 12.5, more preferably 12.1. The skin cleansing composition according to <1> or <2> above, which is ˜12.4.
<4> In component (A), in general formula (1), R ¹ contains two or more alkyl groups, and the component having the largest alkyl chain length is 55% by mass or more and less than 97% by mass The skin cleanser composition according to any one of <1> to <3>, preferably 60 to 95% by mass, more preferably 70 to 95% by mass.

<5> In the component (A), in the general formula (1), the average value (average number of added moles) of n is preferably 1.5 to 10, more preferably 2.5 to 4.5, and 2.5 to 3.4 is still more preferable, 2.8-3.4 is still more preferable, 2.8-3.1 is still more preferable, The skin cleaning composition in any one of said <1>-<4>.
In <6> component (A), in general formula (1), the component of n = 0 is 4.3-30 mass%, 4.9-27 mass% is preferable, and 9.6-27 mass% is more. Preferably, 9.9-16 mass% is still more preferable, It is still more preferable that it contains 9.9-15 mass%, The skin cleaning composition in any one of said <1>-<5>.

<7> In the component (A), in the general formula (1), the total content of the n = 1 component and the n = 2 component is preferably 20 to 37% by mass, and more preferably 27 to 36.6% by mass. The skin cleanser composition according to any one of <1> to <6>, preferably 35 to 36.1% by mass.
<8> In the component (A), in the general formula (1), R ¹ is an alkyl group having 6 to 20 carbon atoms, and the average carbon number of R ¹ is 10.8 to 12.8. The component having an alkyl chain length with a large number content is 55% by mass or more and less than 97% by mass, n represents a number of 0 to 20, and the average value of n is 2.5 to 4.5, <1> to <7, wherein the content of n = 0 is 9.6 to 27% by mass, and the total content of the component n = 1 and the component n = 2 is preferably 27 to 36.5% by mass. > The skin cleanser composition of any one of>.

<9> In the component (A), in the formula (1), R ¹ is an alkyl group having 8 to 18 carbon atoms, the average number of carbon atoms in R ¹ is 10.8 to 12.8, also one The component having an alkyl chain length with a large number content is 55% by mass or more and less than 97% by mass, and n represents a number of 0 to 20, and the average value of n is 2.5 to 3.4. <1> to <8, wherein the content of n = 0 is 9.6 to 27% by mass, and the total content of n = 1 and n = 2 is preferably 27 to 36.5% by mass. > The skin cleanser composition of any one of>.
<10> In the component (A), in the general formula (1), R ¹ is an alkyl group having 8 to 16 carbon atoms, and the average carbon number of R ¹ is 10.8 to 12.5. The component having an alkyl chain length with a large number content is 60 to 95% by mass, n represents a number of 0 to 20, the average value of n is 2.8 to 3.4, and n = 0 Any of the above <1> to <9>, wherein the total content of the component of n = 1 and the component of n = 2 is preferably 27 to 36.5% by mass 2. A skin cleanser composition according to claim 1.

<11> In the component (A), in the general formula (1), R ¹ is an alkyl group having 10 to 16 carbon atoms, and the average carbon number of R ¹ is 12.1 to 12.4. The component having an alkyl chain length with a large number content is 60 to 95% by mass, n represents a number of 0 to 20, the average value of n is 2.8 to 3.1, and n = 0 Any one of the above items <1> to <10>, wherein 9.9 to 15% by mass of the component is included, and the total content of the n = 1 component and the n = 2 component is preferably 35 to 36.1% by mass 2. A skin cleanser composition according to claim 1.
<12> The alkyl ether carboxylic acid of component (A) is preferably contained in an amount of 1% by mass or more, more preferably 5% by mass or more, and further preferably 6% by mass or more in the entire composition. 20 mass% or less is preferable, 15 mass% or less is more preferable, 12 mass% or less is further more preferable, 1-20 mass% is contained in the whole composition, 2-15 mass% is more preferable, 4- The skin cleanser composition according to any one of the above items <1> to <11>, more preferably 12% by mass.

In <13> component (A), in general formula (1), (mass of n = 0 component) :( mass of n = 1 component) :( mass of n = 2 component) :( mass of n = 3 component) ): (Mass of n = 4 components) = 1: 0.99 to 3.50: 0.89 to 3.00: 0.76 to 3.00: 0.63 to 1.6 The skin cleanser composition according to any one of <1> to <12>.
<14> In the component (A), in the general formula (1), a component of n = 0 is contained in an amount of 9.6% by mass to less than 12% by mass, and (mass of n = 0 component): (mass of n = 1 component) ): (Mass of n = 2 components): (mass of n = 3 components): (mass of n = 4 components) = 1: 1.53-1.87: 1.59-2.25: 1.33 To 2.16: 1.14 to 1.52, or a component of n = 0 is contained in an amount of 12% by mass to 17% by mass, (mass of n = 0 component): (mass of n = 1 component) ): (Mass of n = 2 components): (mass of n = 3 components): (mass of n = 4 components) = 1: 0.99-1.34: 0.89-1.40: 0.76 ~ 1.23: The skin cleanser composition according to any one of <1> to <13>, which is preferably 0.63 to 0.99.

<15> In the component (A), in the general formula (1), the component of n = 0 is included in the range of 9.9 to 11.5% by mass, (the mass of the n = 0 component): (the mass of the n = 1 component) : (Mass of n = 2 components): (mass of n = 3 components): (mass of n = 4 components) = 1: 1.58-1.84: 1.72-2.17: 1.49- 2.00: 1.14 to 1.52 or, in the general formula (1), 13 to 17% by mass of n = 0 component (n = 0 component mass): (n = 1 Component mass): (n = 2 component mass): (n = 3 component mass): (n = 4 component mass) = 1: 1.00 to 1.31: 0.93 to 1.34: The skin cleansing composition according to any one of <1> to <14>, preferably 0.79 to 1.18: 0.63 to 0.99.
<16> In the component (A), in the general formula (1), R ¹ is an alkyl group having 4 to 22 carbon atoms, and the average carbon number of R ¹ is 10.8 to 12.8. The component having an alkyl chain length with a large number content is 55% by mass or more and less than 97% by mass, n represents a number of 0 to 20, an average value is 1.5 to 10, and n = 0 Any one of the above items <1> to <15>, wherein the total content of the components of 4.9 to 27% by mass and the component of n = 1 and the component of n = 2 is preferably 20 to 37% by mass. The skin cleansing composition as described.

<17> In the fatty acid of component (B), in general formula (2), R ² is preferably an alkyl group or alkenyl group having 9 to 21 carbon atoms, and may be either a straight chain or branched chain, and has 11 to 21 carbon atoms. Skin alkyl according to any one of <1> to <16>, more preferably an alkyl group having 13 to 17 carbon atoms, more preferably myristic acid, palmitic acid, stearic acid or behenic acid. Agent composition.
The fatty acid of <18> component (B) can use 1 type (s) or 2 or more types, It is preferable to contain 1 mass% or more in the whole composition, 5 mass% or more is more preferable, 6 mass% or more is preferable. More preferably, 20% by mass or less is preferable, 15% by mass or less is more preferable, 12% by mass is further preferable, 1 to 20% by mass is preferably contained in the total composition, 5 to 15% by mass is more preferable, and 6% by mass. The skin cleansing composition according to any one of the above <1> to <17>, which is further preferably contained in an amount of ˜12% by mass.

<19> The total content of components (A) and (B) is preferably 2 to 40% by mass, more preferably 5 to 30% by mass, and 10 to 30% by mass in the total composition. The skin cleansing composition according to any one of <1> to <18>, which is more preferable.
<20> The component (B) preferably contains 40 to 100% by mass, more preferably 50 to 80% by mass, of the fatty acid having 15 to 21 carbon atoms in R ^{2 in} the general formula (2). The skin cleansing composition according to any one of <1> to <19>.
It is preferable that the mass ratio as an acid of <21> component (A) and (B) is (A) / (B) = 0.3-5, 0.5-2 are more preferable, 0.5 The skin cleanser composition according to any one of <1> to <20>, wherein -1.5 is more preferable.
<22> In the component (A) and the component (B), in the general formula (2), the mass ratio of the fatty acid (component (B-1)) in which R ² is an alkyl group having 15 to 21 carbon atoms as an acid. Is preferably (A) / (B-1) = 0.2-5, more preferably 0.3-3.5, still more preferably 0.3-2, and still more preferably 0.4-2. The skin cleanser composition according to any one of <1> to <21>.

<23> Component (C) is preferably cationized cellulose, cationized starch, cationized guar gum, cationized cod gum, cationized locust bean gum, cationized fenugreek gum, cationized xanthan gum, diallyldialkyl quaternary ammonium salt Polymer, diallyldialkyl quaternary ammonium salt / acrylamide copolymer, diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer, vinylimidazolium trichloride / vinylpyrrolidone copolymer, hydroxyethylcellulose / dimethyldiallylammonium chloride Polymer, vinylpyrrolidone / quaternized dimethylaminoethyl methacrylate copolymer, polyvinylpyrrolidone / alkylaminoacrylate copolymer, polyvinylpyrrolide / Alkylamino acrylate / vinyl caprolactam copolymer, vinyl pyrrolidone / methacrylamidopropyl trimethylammonium chloride copolymer, alkylacrylamide / acrylate / alkylaminoalkylacrylamide / polyethylene glycol methacrylate copolymer, adipic acid / dimethylaminohydroxypropylethylenetriamine Copolymer (Sandos Corp., Cartaletin), a cationic polymer described in JP-A-53-139734, JP-A-60-36407, more preferably a diallyldialkyl quaternary ammonium salt / One or more selected from acrylamide copolymer, diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer, cationized guar gum and cationized cellulose The skin cleanser composition according to any one of <1> to <22> above.
<24> Component (C) can use 1 or more types, It is preferable to contain 0.1 mass% or more in all the compositions, 0.5 mass% or more is more preferable, and 5 mass% or less is contained. The content is preferably 2% by mass or less, more preferably 0.1 to 5% by mass in the total composition, and more preferably 0.5 to 2% by mass. 23> The skin cleansing composition of any one of 23>.

<25> The base of component (D) is preferably alkali metal hydroxide of sodium hydroxide or potassium hydroxide; ammonia; organic amine compound of triethanolamine; basic amino acid of arginine, more preferably potassium hydroxide. The skin cleansing composition according to any one of the above <1> to <24>.
<26> Component (D) preferably has a molar ratio (component (D) / (component (A) + component (B)) to components (A) and (B) of 0.9 to 1.1, 0 The skin cleansing composition according to any one of <1> to <25>, more preferably from .95 to 1.05.
<27> Further, component (E) water is contained as a solvent, and the content is preferably 10% by mass or more, more preferably 15% by mass or more, still more preferably 30% by mass or more, and 96% by mass or less in the total composition. Is preferable, 90% by mass or less is more preferable, 87% by mass or less is more preferable, 85% by mass or less is more preferable, 10 to 96% by mass is preferable in the total composition, and 15 to 90% by mass is more preferable. The skin cleanser composition according to any one of <1> to <26>, wherein 30 to 87% by mass is more preferable.

<28> The skin cleanser composition according to any one of <1> to <27>, which preferably further comprises (F) a polyol.
<29> Component (F) As the polyol, sorbitol, glycerin, butylene glycol, propylene glycol, dipropylene glycol, erythritol, mannitol, and xylitol are preferable, and glycerin and sorbitol are more preferable. .
As the polyol of <30> component (F), one or more kinds can be used, and the total composition preferably contains 1% by mass or more, more preferably 5% by mass or more, and 40% by mass or less. Preferably, 30% by mass or less, more preferably 1 to 40% by mass, and more preferably 5 to 30% by mass in the total composition, the skin according to <28> or <29> Cleaning composition.

<31> The skin cleanser composition of the present invention is produced by mixing the blending components by a usual method, and the resulting cleanser composition may be either liquid or solid, but is liquid. Preferably has a viscosity of 200 to 80000 mPa · s when measured with a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at 25 ° C. <1> to <30> Composition.
<32> The skin cleansing composition of the present invention preferably has a pH of 3 to 12, more preferably 5 to 10.5, and still more preferably 5 to 7 <1> to <31. > The skin cleanser composition of any one of>.
<33> The skin cleanser composition of the present invention is suitable as a face wash, body soap, and hand soap, and preferably a face cleanser and body soap. <1> to <32> Composition.

<34> A method for rinsing the skin after applying the skin cleanser composition according to any one of <1> to <33> to a body skin part and washing the body.
<35> Use of the skin cleanser composition according to any one of <1> to <33> for manufacturing a cleanser applied to the skin and washed with foam.

(Measuring method)
In the present invention, the alkyl composition, EO addition molar distribution, and ratio of each component of the alkyl ether carboxylic acid were measured by gas chromatography (GC) by the following analytical method.

(GC analysis conditions)
GC equipment; Agilent Technologies, 7890A
Column; manufactured by Agilent Technologies, DB-5
(30m, inner diameter 0.25mm, film thickness 0.25μm)
Detector; FID
Carrier; helium gas, 1mL / min
Temperature rising condition: Temperature raised from 100 ° C. to 325 ° C. at 5 ° C./min. Then, hold 325 ° C. for 35 minutes.

(Sample pretreatment method)
150 mg of alkyl ether carboxylic acid was dissolved in 50 mL of methanol. Moreover, about the cleaning composition, it extract | collected so that it might become 150 mg as alkyl ether carboxylic acid, and melt | dissolved in 50 mL of methanol. In addition, when the detergent composition contained a strong anionic surfactant such as polyoxyethylene alkyl ether sulfate, it was collected so as to be 250 mg or less. Take 1 mL of this solution and apply it to a solid-phase cartridge (Biotage, Isolute SAX, 1 g, 3 mL, 500-0100-B) that has been conditioned in advance with 4 mL of methanol, and collect the passing solution in a 10 mL round bottom test tube. Gathered. Thereafter, elution was performed with 6 mL of a solution obtained by adding 100 mL of methanol to 4.6 g of formic acid, and the eluate was also collected in the same test tube. The collected solution was placed in a block heater heated to 50 ° C., blown with nitrogen gas, concentrated to about 1 mL, and further blown with nitrogen gas at room temperature to dry. Thereto, 2 mL of a diazomethane-ether solution was added, and the mixture was allowed to stand at room temperature for 10 minutes with stirring for derivatization. Thereafter, nitrogen gas was blown at room temperature, and the mixture was concentrated to 500 μL or less, and then chloroform was added to make 500 μL, which was subjected to GC analysis.
In addition, the diazomethane-ether solution was prepared in the following procedures using the diazomethane production | generation apparatus (Miyamoto Riken Kogyo make, GM-50). The first and second receptacles, and the second and third receptacles are connected with a silicone rubber stopper and a Teflon (registered trademark) tube. In a second receiver, 0.8 g of N-methyl-N′-nitro-N-nitrosoguanidine was collected and 2.5 mL of ion exchange water was added. In a third receiver, 10 mL of t-butyl methyl ether was collected. The first, second and third receivers were ice-cooled. Subsequently, a plastic syringe was attached to the second receiver, and 3 mL of a solution in which 20 g of sodium hydroxide was dissolved in 100 mL of ion-exchanged water was placed in this syringe. This sodium hydroxide aqueous solution is slowly added dropwise to produce diazomethane gas, and nitrogen gas is gently blown from the first receiver side, dissolved in t-butyl methyl ether of the third receiver, and diazomethane-ether A solution was obtained.
The following reagents were used in the sample pretreatment.
Methanol (manufactured by Kanto Chemical, for high performance liquid chromatography, 25183-1B)
Formic acid (manufactured by Wako Pure Chemical Industries, reagent special grade, 066-00461)
Chloroform (manufactured by Kanto Chemical, deer grade 1, 07278-01)
N-methyl-N'-nitro-N-nitrosoguanidine (manufactured by Kanto Chemical, deer grade 1, 25596-51)
t-Butyl methyl ether (manufactured by Kanto Chemical, deer special grade, 04418-00)
Sodium hydroxide (Wako Pure Chemical Industries, special grade, 196-13761)

  The alkyl ether carboxylic acid of component (A) used in the skin cleansing composition of the present invention can be produced, for example, as follows. Unless otherwise indicated, “%” indicates mass%.

Production Example 1
In a stainless steel autoclave equipped with stirring and temperature control functions, 1144 g (6.14 mol) of lauryl alcohol [trade name: Calcoal 2098, manufactured by Kao], 60.2 g (0 trade name: Calcoal 4098, manufactured by Kao) .281 mol) and 2.68 g (0.0478 mol) of potassium hydroxide were added and dehydration under reduced pressure was performed. Next, 996 g (22.6 mol) of ethylene oxide (EO) was introduced at 155 ° C., and the reaction was carried out at a reaction temperature of 155 ° C. and a reaction pressure of 0.4 MPa for 2 hours. After completion of the reaction, the mixture was stirred for 30 minutes at 80 ° C. under reduced pressure of 6 kPa to remove unreacted ethylene oxide, and then nitrogen was introduced to normal pressure, and 4.82 g (0.0482 mol) of 90% lactic acid was autoclaved. In addition, the mixture was stirred at 80 ° C. for 30 minutes to obtain an alkyl ethoxylate (hereinafter also referred to as “produced AE”) having an EO addition mole number of 3.55 mol.
In a glass reaction vessel equipped with a stirring function, temperature control function and oxygen gas introduction tube, 90 g (0.2 mol) of the above product and 16.7 g of 48% aqueous sodium hydroxide solution (0.2 mol as sodium hydroxide) ), Palladium-platinum-bismuth catalyst (supporting 4% palladium, 1% platinum and 5% bismuth on activated carbon, water content 50%) 0.9 g and 494.4 g water, respectively. Under stirring conditions, the liquid temperature was raised to 70 ° C., and a catalytic oxidation reaction was performed at a reaction temperature of 70 ° C. for 3.5 hours while blowing oxygen at a rate of 27 mol% (vs. production AE / hour). The reaction rate was 89%.
After completion of the reaction, the catalyst was filtered off from the reaction solution to obtain an aqueous solution of alkyl ether carboxylic acid Na salt. Subsequently, 35% hydrochloric acid was added, and a liquid separation operation was performed to obtain an alkyl ether carboxylic acid. This is EC1.

As a result of analysis by gas chromatography, EC1 is M = H in the general formula (1), R ¹ is lauryl group / myristyl group = 95/5, the average carbon number is 12.1, and the average value of n is 2. 8, The component of n = 0 was contained 14.7 mass%, and the total amount of the component of n = 1 and the component of n = 2 was 36.1 mass%.
In addition, regarding the ratio of each component having a different number of EO addition moles, as a result of calculation from the measured value of the maximum component of the R ¹ composition, (n = 0 component mass): (n = 1 component mass): ( n = 2 mass of component): (mass of n = 3 component): (mass of n = 4 component) = 1: 1.22: 1.23: 1.06: 0.83.

Production Example 2
Following production example 1, decyl alcohol [trade name: Calcoal 1098, manufactured by Kao], lauryl alcohol [trade name: Calcoal 2098, manufactured by Kao], myristyl alcohol [trade name: Calcoal 4098, manufactured by Kao], cetyl alcohol [trade name] : Calcoal 6098, manufactured by Kao] at a mass ratio of 10/70/15/5 was reacted with EO to obtain an alkyl ethoxylate having 3.55 mol of EO added. This was subjected to an oxidation reaction as in Production Example 1, and the resulting alkyl ether carboxylate was treated with hydrochloric acid to obtain an alkyl ether carboxylic acid.

As a result of analysis by gas chromatography, in general formula (1), M = H, R ¹ is decyl group / lauryl group / myristyl group / palmityl group = 10/70/15/5, average carbon number is 12.3, The average value of n was 3.3 and 15.2% by mass of n = 0 components, and the total amount of n = 1 and n = 2 components was 31.4% by mass.
In addition, regarding the ratio of each component having a different number of EO addition moles, as a result of calculation from the measured value of the maximum component of the R ¹ composition, (n = 0 component mass): (n = 1 component mass): ( n = 2 mass of component): (n = mass of 3 component): (mass of n = 4 component) = 1: 1.07: 1.00: 0.85: 0.67.

Production Example 3
A glass reaction vessel equipped with stirring and temperature control functions was charged with 372 g (2.00 mol) of lauryl alcohol, the temperature was raised to 70 ° C. under stirring conditions, and 256 g (2.20 mol) of sodium monochloroacetate was added. The reaction was carried out for 5 hours while adding 88 g (2.20 mol) of sodium hydroxide in portions. After completion of the reaction, the precipitate was separated by filtration and subsequently acidified by adding 35% hydrochloric acid to obtain an alkyl ether carboxylic acid (in the general formula (1), M = H, R1 is a lauryl group, n = 0 ).

Production Example 4
Following Production Example 1, EO was reacted with decyl alcohol as a raw material to obtain an alkyl ethoxylate having 3.55 moles of EO added. This was subjected to an oxidation reaction as in Production Example 1, and the resulting alkyl ether carboxylate was treated with hydrochloric acid to obtain an alkyl ether carboxylic acid.
As a result of gas chromatography analysis, in general formula (1), M = H, R ¹ is a decyl group, n has an average value of 3.1, n = 0 contains 16% by mass, and n = 1 The total amount of n = 2 components was 37% by mass.

Production Example 5
Following Production Example 1, EO was reacted with lauryl alcohol as a raw material to obtain an alkyl ethoxylate having 3.55 moles of EO added. This was subjected to an oxidation reaction as in Production Example 1, and the resulting alkyl ether carboxylate was treated with hydrochloric acid to obtain an alkyl ether carboxylic acid.
As a result of analysis by gas chromatography, in general formula (1), M = H, R ¹ is a lauryl group, n has an average value of 3.1, n = 0 contains 16% by mass, and n = 1 The total amount of n = 2 components was 37% by mass.

Production Example 6
According to Production Example 1, EO was reacted with myristyl alcohol as a raw material to obtain an alkyl ethoxylate having 3.55 moles of EO added. This was subjected to an oxidation reaction as in Production Example 1, and the resulting alkyl ether carboxylate was treated with hydrochloric acid to obtain an alkyl ether carboxylic acid.
As a result of analysis by gas chromatography, in general formula (1), M = H, R ¹ is a myristyl group, n has an average value of 3.1, n = 0 contains 16% by mass, and n = 1 The total amount of n = 2 components was 37% by mass.

Production Example 7
Following Production Example 1, EO was added to a raw material in which lauryl alcohol and cetyl alcohol were mixed at a mass ratio of 20/80 to obtain an alkyl ethoxylate having 3.55 moles of EO added. This was subjected to an oxidation reaction as in Example 1, and the resulting alkyl ether carboxylate was treated with hydrochloric acid to obtain an alkyl ether carboxylic acid.
As a result of analysis by gas chromatography, in general formula (1), M = H, R ¹ is lauryl group / palmityl group = 20/80, n average value is 3.1, and n = 0 is 16% by mass. In addition, the total amount of the n = 1 component and the n = 2 component was 37% by mass.

Production Example 8
Following Production Example 1, lauryl alcohol was subjected to EO reaction as a raw material to obtain an alkyl ethoxylate having 4.05 moles of EO added. This was subjected to an oxidation reaction as in Production Example 1, and the resulting alkyl ether carboxylate was treated with hydrochloric acid to obtain an alkyl ether carboxylic acid.

As a result of analysis by gas chromatography, in general formula (1), M = H, R ¹ is a lauryl group, n has an average value of 3.5, and n = 0 contains 11.4% by mass, n = 1 The total amount of the components and n = 2 was 30.6% by mass.
In addition, regarding the ratio of each component having a different number of EO addition moles, as a result of calculation from the measured value of the maximum component of the R ¹ composition, (n = 0 component mass): (n = 1 component mass): ( n = 2 mass of component): (mass of n = 3 component): (mass of n = 4 component) = 1.1.31: 1.38: 1.25: 1.06.

Production Example 9
In a stainless steel autoclave equipped with stirring and temperature control functions, 1144 g (6.14 mol) of lauryl alcohol [trade name: Calcoal 2098, manufactured by Kao], 60.2 g (0 trade name: Calcoal 4098, manufactured by Kao) .281 mol) and 2.6 g (0.0478 mol) of potassium hydroxide were added and dehydration under reduced pressure was performed. Subsequently, 718 g (16.3 mol) of ethylene oxide (EO) was introduced at 155 ° C., and the reaction was carried out at a reaction temperature of 155 ° C. and a reaction pressure of 0.4 MPa for 2 hours. After completion of the reaction, the mixture was cooled and stirred at 80 ° C. under a reduced pressure of 6 kPa for 30 minutes to remove unreacted ethylene oxide, then nitrogen was introduced to normal pressure, and 4.82 g (0.0482 mol) of 90% Lactic acid was added to the autoclave and stirred at 80 ° C. for 30 minutes to obtain an alkyl ethoxylate having 2.55 mol of EO added.
A glass reaction vessel equipped with stirring and temperature control functions was charged with 600 g (2.00 mol) of the above product, the temperature of the solution was raised to 70 ° C. under stirring conditions, and 256 g (2.20 mol) of sodium monochloroacetate was added. ) And 88 g (2.20 mol) of sodium hydroxide were added in portions, and the reaction was carried out for 5 hours. After completion of the reaction, 35% hydrochloric acid was added until the pH reached 2.8 to convert it into an acid form, and the oil layer was separated to obtain an alkyl ether carboxylic acid. This is EC6.

As a result of analysis by gas chromatography, in general formula (1), M = H, R ¹ is lauryl group / myristyl group = 94/6, average carbon number is 12.1, average value of n is 3.1, n = 0% component was included, and the total amount of the n = 1 component and the n = 2 component was 35.4% by mass.
In addition, regarding the ratio of each component having a different number of EO addition moles, as a result of calculation from the measured value of the maximum component of the composition of R1, (n = 0 component mass): (n = 1 component mass): (n = Mass of 2 components) :( mass of n = 3 components) :( mass of n = 4 components) = 1: 1.65: 1.92: 1.74: 1.32.

  In the examples to be described later, regarding EC2, the alkyl ether carboxylic acids obtained in Production Example 5, Production Example 6 and Production Example 7 are mixed at a mass ratio of 78.75 / 15 / 6.25, respectively. EC2.

  In the examples described later, regarding EC3, the alkyl ether carboxylic acids obtained in Production Example 2 and Production Example 3 were mixed at a mass ratio of 90/10 to obtain EC3.

  In the examples described later, regarding EC4, EC1 obtained in Production Example 1 and the alkyl ether carboxylic acid obtained in Production Example 4 were mixed in a mass ratio of 40/60 to obtain EC4.

  In the examples described later, regarding EC5, the alkyl ether carboxylic acids obtained in Production Example 2 and Production Example 8 were mixed at a mass ratio of 40/60 to obtain EC5.

Examples 1-13, Comparative Examples 1-5
Skin cleansing compositions having the compositions shown in Tables 2 to 5 were produced, and the elasticity of the foam and the lack of feeling of tension were evaluated. The results are shown in Tables 2 to 5.
In addition, the structure of the component (A) used in the Examples is as shown in Table 1.

(Production method)
Component (D) was added to component (E) purified water (excluding component (E) corresponding to 5 times the amount of component (C)), dissolved, and heated to 75 ° C. Components (A) and (B) were dissolved in this aqueous solution at 70 ° C., and the mixed solution was added and stirred until uniform. Thereafter, if necessary, component (F) was added, stirred until uniform, and cooled to 25 ° C. Next, what mixed the component (E) and component (C) equivalent to 5 times the amount of a component (C) was added, it stirred until it became uniform, and the skin cleansing composition was obtained.

(Evaluation method)
(1) Bubble elasticity:
After the foaming net [manufactured by Hakugen Co., Ltd.] was moistened with water (about 8 g), 1 g of the cleaning agent was placed on the foaming net. The whipping net was wrapped in the palms of both hands, and the palms of both hands were rubbed together to draw a circle 40 times.
The foamed foam was collected in a petri dish (diameter 6.6 cm, height 1.8 cm), and excess foam was removed with a ruler so that the liquid surface and the petri dish were flush with each other. For the measurement of foam elasticity, a FUDOH rheometer RTC (manufactured by Fudo Kogyo Co., Ltd.) was used, and a dedicated adapter 3 (compression elasticity measurement adapter Dφ = 5) was used. Install the adapter on the surface of the foam on the petri dish, set the sampling direction to 0.1 seconds, the stroke 20 mm, the speed 30 cm / min, the display in g, the foam liquid temperature about 25 ° C, and the stroke direction up and down. Then, the stress applied to the adapter was measured. Among the measured values, the numerical value when the adapter is most loaded is the elasticity, and the numerical value displayed on the rheometer is shown in the table.

(2) No sense of tension:
Five professional panelists washed their face with 1 g of each skin cleanser composition, rinsed with water, and then sensory-evaluated the feeling of squeezing immediately after towel drying based on the following criteria to determine the total score.
3; It's not tangled.
2;
1;
0;

Example 14
Skin cleansing compositions having the following compositions were produced in the same manner as in Examples 1-15.
(Ingredient) (mass%)
EC6 8
Myristic acid 2
Palmitic acid 4
Stearic acid 2
Behenic acid 2
Diallyldialkyl quaternary ammonium salt / acrylamide /
Acrylic acid copolymer * 1 1
Lauryl hydroxysulfobetaine * 2 3
Glycerin 10
Potassium hydroxide 3.1
Water balance
Total 100

* 1: Marcote Plus 3331 (Lubrizol Advanced Materials, Inc.)
* 2: Active ingredient of Amphital 20HD (Kao) The obtained skin cleanser composition had fine foam and excellent elasticity, and the washed-out skin was moist and did not feel a firm feeling.

Example 15
Skin cleansing compositions having the following compositions were produced in the same manner as in Examples 1-15.
(Ingredient) (mass%)
EC1 8
Palmitic acid 4
Stearic acid 4
O- [2-hydroxy-3- (trimethylammonio) propyl] chloride
Guar gum * 3 0.5
Glycerin mono-2-ethylhexyl ether solution * 4 3
Sorbitol 20
Potassium hydroxide 2.4
Water balance
Total 100

* 3: Jaguar C-17K (Rhodia Operations (Novecare))
* 4: Active ingredient of Penetol GE-EH (Kao) The obtained skin cleanser composition has fine foam and excellent elasticity, and the washed-out skin is moist and does not feel a firm feeling. .

Claims (12)

The following components (A), (B), (C), (D) and (E):
(A) General formula (1)

(In the formula, R ¹ represents an alkyl group having 4 to 22 carbon atoms, and n represents a number of 0 to 20).
Wherein R ^{1 has} an average carbon number of 10.8 to 12.8, 4.3 to 30% by mass of n = 0, and n = 1 1-20% by mass of an alkyl ether carboxylic acid having a total content of n = 2 components of 20% by mass or more and less than 40% by mass,
(B) General formula (2)

(Wherein R ² represents a linear or branched alkyl or alkenyl group having 9 to 21 carbon atoms)
1 to 20% by mass of a fatty acid represented by
(C) Cationic polymer 0.1-5% by mass,
(D) a base,
(E) It contains water, and components (A) and (B) are at least partially present as component (D) and salt, and component (D) is a molar ratio of components (A) and (B) ( Skin cleanser composition whose component (D) / (component (A) + component (B)) is 0.9-1.1.   The skin cleanser composition according to claim 1, further comprising (F) a polyol. Component (B), the general formula (2) in claim 1 or 2 skin cleansing composition according the number of carbon atoms in R ² is intended to include 40 to 100 wt% of the fatty acids of 15 to 21.   The skin cleansing composition according to any one of claims 1 to 3, wherein a mass ratio of the components (A) and (B) as an acid is (A) / (B) = 0.3 to 5.   In component (A), the average value (average addition mole number) of n is 1.5-10 in general formula (1), The skin cleanser composition of any one of Claims 1-4. In the component (A), in the general formula (1), R ¹ is an alkyl group having 6 to 20 carbon atoms, an average value of n is 2.5 to 4.5, and a component of n = 0 is 9. The skin cleanser composition according to any one of claims 1 to 5, comprising 6 to 27% by mass. In the component (A), in the general formula (1), R ¹ is an alkyl group having 8 to 18 carbon atoms, the average value of n is 2.5 to 3.4, and the component of n = 0 is 9. The skin cleanser composition according to any one of claims 1 to 6, comprising 6 to 27% by mass. In the component (A), in the general formula (1), R ¹ is an alkyl group having 8 to 16 carbon atoms, an average value of n is 2.8 to 3.4, and a component of n = 0 is 9. The skin cleansing composition according to any one of claims 1 to 7, comprising 6 to 27% by mass, and 27 to 36.5% by mass in total of a component of n = 1 and a component of n = 2.   In component (A), in general formula (1), (mass of n = 0 component): (mass of n = 1 component): (mass of n = 2 component): (mass of n = 3 component): ( n = mass of four components) = 1: 0.99 to 3.50: 0.89 to 3.00: 0.76 to 3.00: 0.63 to 1.6 A skin cleanser composition according to claim 1. In component (A), in general formula (1), R ¹ contains two or more alkyl groups, and the component having the largest alkyl chain length is 55% by mass or more and less than 97% by mass. The skin cleansing composition according to any one of 1 to 9.   In the component (A), in the general formula (1), the component of n = 0 is contained in an amount of 8% by mass or more and less than 12% by mass, (n = 0 component mass): (n = 1 component mass): (n = 2 component mass): (n = 3 component mass): (n = 4 component mass) = 1.1.53-1.87: 1.59-2.25: 1.33-2.16: 1.14 to 1.52, or 12 to 17% by mass of n = 0 component, (n = 0 component mass): (n = 1 component mass): (n = 2 component mass): (n = 3 component mass): (n = 4 component mass) = 1: 0.99 to 1.34: 0.89 to 1.40: 0.76 to 1.23: The skin cleansing composition according to any one of claims 1 to 10, which is 0.63 to 0.99.   A method for rinsing the skin after applying the skin cleansing composition according to any one of claims 1 to 11 to a body skin part and cleaning the body skin part.