TWI542364B - Skin detergent composition - Google Patents

Description

Skin detergent composition

This invention relates to a skin cleanser composition.

In recent years, body cleansers have been required to be mild to the skin. Especially with regard to the foam during washing, there are also consumers who believe that if the foam with a thicker inelastic texture is continuously rubbed, it will cause dry skin, or spots, wrinkles and other skin problems, along with anti-aging. Increased awareness requires a more flexible foaming detergent.

A paste-like detergent obtained by crystallizing a fatty acid is one of the detergents which are generally considered to be capable of obtaining an elastic foam. Patent Document 1 discloses a combination of a fatty acid and a cationic polymer.

Further, in order to impart elasticity to the foam, the inventors attempted to combine the anionic surfactant with a specific nonionic surfactant to strengthen the foam film (Patent Document 2), and by combining a specific fatty acid salt with other surfactants. Thereby, a homogeneous and thick foam texture is formed (Patent Document 3).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2011-20941

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2008-150303

[Patent Document 3] Japanese Patent Laid-Open No. Hei 11-35972

The present invention relates to a skin cleanser composition comprising the following components (A), (B), (C), (D) and (E): (A) alkyl ether carboxylic acid 1-20% by mass , which is represented by the formula (1): [Chemical Formula 1] R ¹ -O-(CH ₂ CH ₂ O) _n -CH ₂ -COOH (1) (wherein R ¹ represents an alkyl group having 4 to 22 carbon atoms; , n represents the number from 0 to 20), the average carbon number of R ¹ is 10.8 to 12.8, and the composition containing n = 0 is 4.3 to 30% by mass, and the total content of the component of n = 1 and the component of n = 2 20% by mass or more and less than 40% by mass; (B) 1 to 20% by mass of the fatty acid, which is represented by the formula (2): [Chemical 2] R ² -COOH (2) (wherein R ² represents carbon The alkyl or alkenyl group of a linear or branched chain of 9 to 21 is represented by (C) a cationic polymer of 0.1 to 5% by mass; (D) a base; (E) water; and the components (A) and (B) At least a part of the component (D) is present in the form of a salt, and the molar ratio of the component (D) to the components (A) and (B) (component (D) / (component (A) + component (B)) is 0.9~1.1.

A paste-like detergent obtained by crystallizing a fatty acid as in Patent Document 1 is required. A large amount of fatty acid, as a feeling of use after washing, tends to be tight and dry, and is unsatisfactory depending on the person. On the other hand, in combination with an anionic surfactant of Patent Document 2 and a specific nonionic surfactant, or a combination of a fatty acid salt of Patent Document 3 and other surfactants, a thick foam texture is formed. , but the problem of weakening the elasticity of the bubble.

The present invention relates to a skin cleansing composition which is fine in texture and excellent in elasticity and which moisturizes the skin after washing to suppress tightness.

The present inventors have found that when a specific alkyl ether carboxylic acid, a specific fatty acid, and a cationic polymer are used in combination, it is possible to obtain a skin which is fine in foam texture and excellent in elasticity, and moisturizes the skin after washing to suppress tightness. Detergent composition.

The skin cleansing agent composition of the present invention is a foam which is fine in texture and excellent in elasticity, and which moisturizes the skin after washing to suppress the feeling of tightness. In the present invention, the feeling of tightness is the feeling that the surface of the skin is tight after the end of washing, for example, after drying with a towel.

The alkyl ether carboxylic acid of the component (A) used in the present invention is represented by the 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 preferably an alkyl group having 8 to 18 carbon atoms, and further preferably having a carbon number of 8 to 16 The alkyl group is more preferably an alkyl group having 10 to 16 carbon atoms. And, R ¹ alkyl chains may be straight or branched of any one of, in terms of the sexual to the foaming, preferably a linear alkyl group. Further, the average carbon number of R ¹ is from 10.8 to 12.8, preferably from 10.8 to 12.5, more preferably from 12.1 to 12.4. When it is in this range, it is excellent in terms of foaming property, foam texture, and low-temperature stability, and therefore it is preferable.

Further, it is preferable that R ¹ contains two or more kinds of alkyl groups, and the component having the highest alkyl chain length is preferably 55 mass% or more and less than 97 mass%, more preferably 60 to 95 mass%, further It is preferably 70 to 95% by mass, and is preferred because of the excellent foam amount and foam texture.

Further, in the formula, n represents a number from 0 to 20, more preferably from 0 to 12. Further, n represents the molar number of addition of ethylene oxide, and the average addition mole number (the average of n) in the composition of the component (A) is preferably 1.5 to the viewpoint of a good foam texture. 10, more preferably 2.5 to 4.5, further preferably 2.5 to 3.4, more preferably 2.8 to 3.4, still more preferably 2.8 to 3.1.

The alkyl ether carboxylic acid of the component (A) is contained in the formula (1), and the component of n = 0 is 4.3 to 30% by mass, preferably 4.9 to 27% by mass, more preferably 9.6 to 27% by mass, and further Preferably, it is 9.9 to 16% by mass, and more preferably 9.9 to 15% by mass. By setting it as this range, the rubbing feeling at the time of washing is improved.

Further, 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 from the viewpoint of the foam texture and the amount of foam. It is 27 to 36.5 mass%, and more preferably 35 to 36.1 mass%.

In the alkyl ether carboxylic acid of the component (A), in the formula (1), the mass ratio of the components of n = 0, 1, 2, 3, 4 is (the mass of the component of n = 0): (n = 1) The mass of the component): (the mass of the component of n=2): (the mass of the component of n=3): (n=4 The mass of the component is =1: 0.99 to 3.50: 0.89 to 3.00: 0.76 to 3.00: 0.63 to 1.6, which is preferable in terms of foaming property, detergency, and frictional feeling during rinsing.

Further, in the general formula (1), the component containing n=0 is 9.6 mass% or more and less than 12 mass%, and is (the mass of the component of n=0): (the mass of the component of n=1): (n) The mass of the component of =2): (the mass of the component of n=3): (the mass of the component of n=4)=1:1.53~1.87:1.59~2.25:1.33~2.16:1.14~1.52, or contain n= The component of 0 is 12% by mass or more and 17% by mass or less, and is (the mass of the component of n = 0): (the mass of the component of n = 1): (the mass of the component of n = 2): (n = 3 The mass of the component): (the mass of the component of n=4) = 1: 0.99 - 1.34: 0.89 - 1.40: 0.76 - 1.23: 0.63 - 0.99, which is preferable from the viewpoint of foaming property and rinsing property.

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

In the component (A), preferably, in the formula (1), R ¹ is an alkyl group having 4 to 22 carbon atoms, and the average carbon number of R ¹ is from 10.8 to 12.8, and further, the alkyl chain having the highest content The long component is 55 mass% or more and less than 97 mass%, and further, n represents the number of 0 to 20, the average value is 1.5 to 10, and the component including n=0 is 4.9 to 27 mass%, and the component of n=1 The total content of the components with n = 2 is 20 to 37% by mass. By setting it as such, the foaming property can be accelerated.

In the component (A), preferably, in the formula (1), R ¹ is an alkyl group having 6 to 20 carbon atoms, and the average carbon number of R ¹ is from 10.8 to 12.8, and further, the alkyl chain having the highest content The long component is 55 mass% or more and less than 97 mass%, and further, n represents a number of 0 to 20, and the average value is 2.5 to 4.5, and the component including n=0 is 9.6 to 27 mass%, and the component of n=1 The total content of the components with n = 2 is 27 to 36.5 mass%. By setting it as such, the foaming property can be accelerated.

In the component (A), preferably, in the formula (1), R ¹ is an alkyl group having 8 to 18 carbon atoms, and the average carbon number of R ¹ is from 10.8 to 12.8, and further, the alkyl chain having the highest content The long component is 55 mass% or more and less than 97 mass%, and further, n represents a number of 0 to 20, and the average value is 2.5 to 3.4, and the component including n=0 is 9.6 to 27 mass%, and the component of n=1 The total content of the components with n = 2 is 27 to 36.5 mass%. By setting it as such, the retention property at the time of rinsing can be enhanced.

In the component (A), preferably, in the 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, and further, the alkyl chain having the highest content The long component is 60 to 95% by mass, and further, n represents a number of 0 to 20, and the average value is 2.8 to 3.4, and the component including n=0 is 9.6 to 27% by mass, preferably 9.9 to 16% by mass, and The total content of the component of n=1 and the component of n=2 is 27 to 36.5 mass%. By setting it as such, the foam amount and the foam texture can be improved.

In the component (A), preferably, in the 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, and further, the alkyl chain having the highest content The long component is 60 to 95% by mass. Further, n represents the number of 0 to 20, the average value is 2.8 to 3.1, and the component containing n=0 is 9.9 to 15% by mass, and the component of n=1 and n=2 The total content of the components is 35 to 36.1% by mass. By setting it as such, it is possible to increase the amount of foam, the texture of the foam, and the degree of difficulty in dripping the foam.

Further, in the present invention the component (A), with respect to R ¹ of the alkyl chain length distribution, the average alkyl chain length of R ^1, n = 0 component amount of the average addition molar number n, the n The mass ratio of the components of =0, 1, 2, 3, and 4 was analyzed by gas chromatography for the alkyl ether carboxylic acid represented by the formula (1), and was determined as follows.

[Distribution of alkyl chain length of R ¹ ]

Among the peak areas obtained by gas chromatography, the peak area of each alkyl chain length corresponding to n=0 moles was determined, and the total of these was set to 100, and the distribution of each alkyl chain length was determined. Percentage. Similarly, when n=1~3 moules, the values of the percentages of the alkyl chain length distributions of n=0~3 mol are averaged, and the distribution of the alkyl chain length of R ¹ is obtained ( Thereby, it is possible to determine the alkyl component having the largest content in the composition of R ¹ ).

[R ¹ average alkyl chain length]

According to the distribution of the alkyl chain length of R ¹ obtained as described above, the ratio of each component is determined, and the obtained ratio is multiplied by the carbon number of the corresponding alkyl chain length portion to obtain the same. The sum of them. This was set to the average alkyl chain length.

[The content of the component of n=0, the component of n=1 and the total content of the component of n=2]

It is determined that the composition of R ¹ contains the most alkyl chain length, and the area of the gas phase chromatography corresponding to n = 0 to 10 of the component is totaled. The total amount thereof was set to 100%, and the total amount of the component amount of n=0, the component of n=1, and the component of n=2 was calculated.

[n the average addition of moles]

It is determined that the composition of R ¹ contains the most alkyl chain length, and the area of the gas chromatography corresponding to n=0 to 10 of the component is totaled (n is a trace amount of 11 or more, and is removed from the calculation). The total amount is set to 1, and each ratio of n=0 to 10 is obtained. This ratio is multiplied by the number of added moles, and the total of these is set to the average addition of n to the number of moles.

[n=0, n=1, n=2, n=3, n=4 mass ratio of components]

Peak area ratios on different EO (Ethylene Oxide, ethylene oxide) adduct molar number of each component, by gas chromatography system in accordance with the obtained, determined by the method described above, R ¹ of alkyl chain length distribution, to determine the composition of the R ¹ alkyl chain length of the maximum content component, and according to the largest component of n = 0, n = 1, n = 2, n = 3, n = 4 the ratio of the area And ok.

The alkyl ether carboxylic acid of the component (A) has a composition as described above, and a sufficient amount of foam at the time of washing, a good foam texture, and a feeling of tightness are suppressed. In particular, it is contained in an amount of 1% by mass or more, preferably 5% by mass or more, and more preferably 6% by mass or more. In addition, the content of the component (A) is preferably 20% by mass or less, more preferably 15% by mass or less, and still more preferably 12% by mass or less based on the total composition. Further, the component (A) is preferably contained in an amount of from 1 to 20% by mass, more preferably from 2 to 15% by mass, even more preferably from 4 to 12% by mass, based on the total composition. Further, by using the component (D), the component (A) forms part or all of a salt to exhibit the above effects.

The fatty acid of the component (B) used in the present invention is represented by the above formula (2).

In the formula, R ² is an alkyl group or an alkenyl group having 9 to 21 carbon atoms, and may be any of a straight chain or a branched chain, more preferably an alkyl group having 11 to 21 carbon atoms, and further preferably a carbon number of 13~ 17 alkyl.

As the component (B), myristic acid, palmitic acid, stearic acid or behenic acid is preferred.

Further, in the fatty acid of the component (B), in the formula (2), the fatty acid having an alkyl group having 15 to 21 carbon atoms or an alkenyl group as R ² preferably contains 40% of all the fatty acids of the component (B). 100% by mass, and more preferably 50 to 80% by mass, is preferable in terms of the texture of the foam being finer and suppressing the feeling of tightness.

The component (B) may be used alone or in combination of two or more. From the viewpoint of obtaining the detergency and the foaming property, it is contained in an amount of 1% by mass or more, preferably 5% by mass or more, and more preferably 6% by mass. %the above. Moreover, the content of the component (B) in all the components is both suppressed by the elasticity and tightness of the foam, and is composed of The foaming degree of the material is preferably 20% by mass or less, more preferably 15% by mass or less, and still more preferably 12% by mass. Further, the component (B) is preferably contained in an amount of from 1 to 20% by mass, more preferably from 5 to 15% by mass, even more preferably from 6 to 12% by mass, based on the total composition.

In the skin detergent composition of the present invention, the total content of the components (A) and (B) is preferably from 2 to 40% by mass, more preferably from the viewpoint of obtaining a more elastic foam. It is 5 to 30% by mass, and more preferably 10 to 30% by mass.

Further, it is considered that in the skin detergent composition of the present invention, the solubility of the component (B) can be improved by mixing the components (A) and (B), and the foam formed by the component (A) can be obtained. The alignment of the component (B) is improved in the film. As a result, a fine foam texture can be obtained. In particular, the mass ratio of the components (A) and (B) as an acid increases the elasticity of the foam and suppresses the feeling of tightness, and is preferably (A) / (B) = 0.3 to 5, more preferably 0.5. ~2, further preferably 0.5 to 1.5.

Further, in the component (A) and the component (B), in the general formula (2), the mass ratio of the fatty acid (component (B-1)) having an alkyl group having 15 to 21 carbon atoms of R ² as an acid is In terms of improving the elasticity of the foam and suppressing the feeling of tightness, it is preferably (A) / (B-1) = 0.2 to 5, more preferably 0.3 to 3.5, still more preferably 0.3 to 2, and further preferably 0.4~2.

Examples of the cationic polymer of the component (C) used in the present invention include cationized cellulose, cationized starch, cationized guar gum, cationized tara gum, cationized locust bean gum, and cationized fenugreek Glue, yang Ionized xanthan gum, polymer of diallyldialkyl quaternary ammonium salt, diallyl dialkyl quaternary ammonium salt / acrylamide copolymer, diallyl dialkyl quaternary ammonium Salt / acrylamide / acrylic acid copolymer, vinyl imidazolium trichloride / vinyl pyrrolidone copolymer, hydroxyethyl cellulose / dimethyl diallyl ammonium chloride copolymer, vinyl pyrrolidine Ketone/quaternary amination of dimethylaminoethyl methacrylate copolymer, polyvinylpyrrolidone/alkylamino acrylate copolymer, polyvinylpyrrolidone/alkylamino acrylate/ethylene Hexylamine copolymer, vinyl pyrrolidone/methacrylamide propyltrimethylammonium chloride copolymer, alkyl acrylamide/acrylate/alkylaminoalkyl acrylamide/poly Ethylene glycol methacrylate copolymer, adipic acid/dimethylaminohydroxypropyl-extended ethyltriamine copolymer (Cartaretin, USA), Japanese Patent Laid-Open No. 53-139734, and Japanese Patent Laid-Open A cationic polymer or the like described in Japanese Patent Publication No. 60-36407.

Among these, from the viewpoint of obtaining a flexible foam, it is preferably selected from diallyldialkyl quaternary ammonium salt/acrylamide copolymer, diallyldialkyl quaternary ammonium One or more of a salt/acrylamide/acrylic acid copolymer, a cationized guar gum, and a cationized cellulose.

The component (C) may be used in an amount of 0.1% by mass or more, preferably 0.5% by mass or more, preferably 5% by mass or less, and more preferably 5% by mass or less, from the viewpoint of obtaining a more elastic foam. The content is preferably 2% by mass or less. Further, the content of the component (C) is preferably from 0.1 to 5% by mass, and more preferably from 0.5 to 2% by mass, based on the total composition.

Examples of the base of the component (D) used in the present invention include hydroxides of alkali metals such as sodium hydroxide and potassium hydroxide; organic amine compounds such as ammonia and triethanolamine; and basic amino acids such as arginine. Wait. Among these, from the viewpoint of stability, a hydroxide of an alkali metal is preferred, and potassium hydroxide is preferred in terms of adjustment of liquid properties.

In the present invention, at least a part of the components (A) and (B) and the component (D) are present in the form of a salt.

The molar ratio (component (D) / (component (A) + component (B))) of the component (D) to the components (A) and (B) is 0.9 to 1.1, preferably 0.95 to 1.05. Contains. By using in this way, a more elastic foam can be obtained.

The skin detergent composition of the present invention may further contain the component (E) water as a solvent. The water is preferably contained 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, and further preferably more preferably 90% by mass or more. It is 87% by mass or less, and more preferably 85% by mass or less. Further, the water may preferably contain 10 to 96% by mass, more preferably 15 to 90% by mass, still more preferably 30 to 87% by mass, based on the total composition, and the above-mentioned components constituting the detergent composition and The remainder of the other ingredients.

Since the skin detergent composition of the present invention contains the components (A) to (E), the texture of the foam can be fine, and the elasticity of the foam can be improved, so that it is not easy to damage the skin during washing, and the smoothness can be improved. The touch is high and the washing is high, and the feeling of tightness can be suppressed.

The skin cleansing composition of the present invention may further contain (F) a polyhydric alcohol, and the skin moisturization at the end of washing may be further enhanced without a tight touch.

Examples of the polyhydric alcohol include sorbitol, glycerin, butylene glycol, propylene glycol, dipropylene glycol, erythritol, mannitol, and xylitol. Among these, glycerin and sorbitol are preferred from the viewpoint of moisturizing the skin which is not moisturized, and the skin feel and the elasticity of the foam.

The polyol of the component (F) may be used in an amount of at least 1% by mass, more preferably 5% by mass or more, more preferably 5% by mass or more, in terms of the touch of the skin after washing. 40% by mass or less, more preferably 30% by mass or less. Further, the component (F) is preferably contained in an amount of from 1 to 40% by mass, more preferably from 5 to 30% by mass, based on the total composition.

The skin detergent composition of the present invention may further contain a component used in a usual detergent, for example, a surfactant other than the components (A) and (B), a moisturizer, an oil component, a bactericide, an anti-inflammatory agent, Preservatives, chelating agents, tackifiers, salts other than the component (D), pearlizing agents, scrub agents, perfumes, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts, and the like.

The skin detergent composition of the present invention is produced by mixing the formulation components by a usual method. The obtained detergent composition may be either a liquid or a solid, and when it is in the form of a liquid, the viscosity at the time of measurement at 25 ° C by a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) is preferably 200~80000 mPa. s, and can be adjusted by appropriately selecting the blending ingredients.

Further, the pH is preferably from 3 to 12, more preferably from 5 to 10.5, and still more preferably 5 ~7. Further, the pH was measured by diluting each of the detergent compositions to 20 times with ion-exchanged water at 25 °C.

The skin detergent composition of the present invention is suitably used, for example, as a facial cleanser, a body soap, a hand soap or the like, and is preferably a facial cleanser or a body soap.

A method of washing the skin using the skin cleansing composition of the present invention is as follows, for example. In other words, the skin cleansing composition of the present invention is applied to the body, that is, the skin parts such as the face, hands, feet, and body, to form a foam and washed, and then rinsed with warm water such as a shower. Further, it can be used by applying a suitable amount to a washing aid such as a resin-made towel, a resin sponge, or a brush to form a foam, and to wash it more effectively.

The present invention further discloses the following compositions, methods, and uses in the above embodiments.

<1> A skin detergent composition comprising the following components (A), (B), (C), (D), and (E): (A) alkyl ether carboxylic acid 1 to 20% by mass, It is represented by the formula (1): [Chemical 3] R ¹ -O-(CH ₂ CH ₂ O) _n -CH ₂ -COOH (1) (wherein R ¹ represents an alkyl group having 4 to 22 carbon atoms, n represents the number from 0 to 20), the average carbon number of R ¹ is 10.8 to 12.8, and the component containing n=0 is 4.3 to 30% by mass, and 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; (B) 1 to 20% by mass of a fatty acid, which is represented by the formula (2): [Chemical 4] R ² -COOH (2) (wherein R ² represents a carbon number a linear or branched alkyl or alkenyl group of 9 to 21); (C) a cationic polymer of 0.1 to 5% by mass; (D) a base; (E) water; and components (A) and (B) At least a part of the component (D) is present in the form of a salt, and the molar ratio of the component (D) to the components (A) and (B) (component (D) / (component (A) + component (B)) is 0.9. ~1.1.

<2> The skin detergent composition according to the above <1>, wherein, in the component (A), in the formula (1), R ¹ is an alkyl group having 4 to 22 carbon atoms, preferably a carbon number of 6 The alkyl group of ~20, further preferably an alkyl group having 8 to 18 carbon atoms, further preferably an alkyl group having 8 to 16 carbon atoms, more preferably an alkyl group having 10 to 16 carbon atoms, and further, an alkane of R ¹ The base chain may be either a straight chain or a branched chain, preferably a linear alkyl group.

<3> The skin detergent composition according to the above <1> or <2>, wherein, in the component (A), the average carbon number of R ^{1 in} the formula (1) is from 10.8 to 12.8, preferably 10.8~12.5, more preferably 12.1~12.4.

The skin detergent composition of any one of the above-mentioned <1>, wherein, in the component (A), in the formula (1), R ¹ contains two or more kinds of alkyl groups, The component having the highest alkyl chain length is preferably 55 mass% or more and less than 97 mass%, more preferably 60 to 95 mass%, still more preferably 70 to 95 mass%.

<5> The skin detergent composition according to any one of the above <1> to <4> wherein, in the component (A), the average value of n in the formula (1) (average addition of the molar The number is preferably from 1.5 to 10, more preferably from 2.5 to 4.5, further preferably from 2.5 to 3.4, further preferably from 2.8 to 3.4, and even more preferably from 2.8 to 3.1.

The skin detergent composition according to any one of the above-mentioned items, wherein, in the component (A), the component (1) contains a mass of 4.3 to 30 of n=0. % is preferably 4.9 to 27% by mass, more preferably 9.6 to 27% by mass, still more preferably 9.9 to 16% by mass, still more preferably 9.9 to 15% by mass.

The skin cleansing composition of any one of the above-mentioned <1>, wherein, in the component (A), in the formula (1), the component of n=1 and n=2 The total content of the components is preferably from 20 to 37% by mass, more preferably from 27 to 36.6% by mass, still more preferably from 35 to 36.1% by mass.

The skin detergent composition according to any one of the above-mentioned items, wherein, in the component (A), R ¹ is a carbon number 6 in the formula (1). The alkyl group of ~20, the average carbon number of R ¹ is 10.8 to 12.8, and the component having the highest alkyl chain length is 55 mass% or more and less than 97 mass%, and further, n represents 0 to 20 The average value of n is 2.5 to 4.5, and the component containing n=0 is 9.6 to 27 mass%, and the total content of the component of n=1 and the component of n=2 is 27 to 36.5 mass%.

The skin detergent composition according to any one of the above-mentioned items, wherein, in the component (A), R ¹ is a carbon number 8 in the formula (1). The alkyl group of ~18, the average carbon number of R ¹ is from 10.8 to 12.8, and the component having the highest alkyl chain length is 55 mass% or more and less than 97 mass%, and further, n represents the number of 0-20. The average value of n is 2.5 to 3.4, and the component containing n=0 is 9.6 to 27 mass%, and the total content of the component of n=1 and the component of n=2 is 27 to 36.5 mass%.

The skin detergent composition according to any one of the above-mentioned items, wherein, in the component (A), R ¹ is a carbon number in the formula (1). The alkyl group of ~16, the average carbon number of R ¹ is 10.8 to 12.5, and the component having the highest alkyl chain length is 60 to 95% by mass. Further, n represents the number of 0 to 20, and the average of n 2.8 to 3.4, the composition containing n=0 is 9.6 to 27% by mass, and the total content of the component of n=1 and the component of n=2 is 27 to 36.5 mass%.

The skin cleansing composition according to any one of the above-mentioned <1>, wherein, in the component (A), R ¹ is a carbon number of 10 in the formula (1). ~ 16 alkyl group, the average carbon number of R ¹ is from 12.1 to 12.4, and having a maximum chain length of the alkyl component content of 60 to 95% by mass, and further, n represents a number of 0 to 20, the average value of n 2.8 to 3.1, the composition containing n=0 is 9.9 to 15% by mass, and the total content of the component of n=1 and the component of n=2 is 35 to 36.1% by mass.

The skin detergent composition according to any one of the above aspects, wherein the alkyl ether carboxylic acid of the component (A) preferably contains all of the components. 1% by mass or more, more preferably 5% by mass or more, further preferably 6% by mass or more, more preferably 20% by mass or less, even more preferably 15% by mass or less, still more preferably 12% by mass based on the total composition. Hereinafter, the total composition is preferably from 1 to 20% by mass, more preferably from 2 to 15% by mass, even more preferably from 4 to 12% by mass.

The skin cleansing composition according to any one of the above-mentioned items (1), wherein, in the component (A), it is preferred that (n = 0) The mass of the component): (the mass of the component of n = 1): (the mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1: 0.99 ~ 3.50 : 0.89~3.00: 0.76~3.00: 0.63~1.6.

The skin cleansing composition of any one of the above-mentioned <1>, wherein, in the component (A), it is preferred that the component (1) contains a component of n=0. 9.6 mass% or more and less than 12 mass%, and becomes (the mass of the component of n=0): (the mass of the component of n=1): (the mass of the component of n=2): (the component of n=3) Mass): (the mass of the component of n=4)=1:1.53~1.87:1.59~2.25:1.33~2.16:1.14~1.52, or 12% by mass or more and 17% by mass or less of the component containing n=0, and become (the mass of the component of n = 0): (the mass of the component of n = 1): (the mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1:0.99~1.34: 0.89~1.40: 0.76~1.23: 0.63~0.99.

The skin detergent composition according to any one of the above aspects, wherein, in the component (A), it is preferred that the formula (1) includes n=0. The composition is 9.9 to 11.5 mass%, and becomes (the mass of the component of n = 0): (the mass of the component of n = 1): (the mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n=4)=1: 1.58~1.84: 1.72~2.17: 1.49~2.00: 1.14~1.52, or 13 to 17% by mass of the component containing n=0 in the general formula (1), and becomes (the mass of the component of n = 0): (the mass of the component of n = 1): (the mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1:1.00~1.31: 0.93~1.34: 0.79~1.18: 0.63~0.99.

The skin detergent composition according to any one of the above-mentioned items, wherein, in the component (A), R ¹ is a carbon number 4 in the formula (1). The alkyl group of ~22, the average carbon number of R ¹ is from 10.8 to 12.8, and the component having the highest alkyl chain length is 55 mass% or more and less than 97 mass%, and further, n represents the number of 0-20. The average value is 1.5 to 10, and the component containing n=0 is 4.9 to 27 mass%, and the total content of the component of n=1 and the component of n=2 is 20 to 37 mass%.

The skin detergent composition according to any one of the above-mentioned items, wherein, in the fatty acid of the component (B), in the formula (2), R ^{2 is} preferably a carbon number of 9 The alkyl or alkenyl group of ~21 may be either a straight chain or a branched chain, more preferably an alkyl group having 11 to 21 carbon atoms, still more preferably an alkyl group having 13 to 17 carbon atoms, and further preferably Myristic acid, palmitic acid, stearic acid or behenic acid.

The skin cleansing composition of any one of the above-mentioned <1>, wherein the fatty acid of the component (B) may be used alone or in combination of two or more. The composition of the portion is preferably 1% by mass or more, more preferably 5% by mass or more, further preferably 6% by mass or more, preferably 20% by mass or less, more preferably 15% by mass or less, still more preferably 12% by mass. The mass % is preferably from 1 to 20% by mass, more preferably from 5 to 15% by mass, even more preferably from 6 to 12% by mass, based on the total composition.

The skin detergent composition according to any one of the above-mentioned items, wherein the total content of the components (A) and (B) is preferably from 2 to 40% by mass based on the total composition. More preferably, it is 5 to 30% by mass, and further preferably 10 to 30% by mass.

The skin detergent composition according to any one of the above aspects, wherein the component (B) preferably contains the formula (2), and the carbon number of R ² is 15 to 21 The fatty acid is 40 to 100% by mass, and more preferably 50 to 80% by mass.

The skin detergent composition according to any one of the above items <1> to <20> wherein the mass ratio of the components (A) and (B) as an acid is preferably (A)/(B). = 0.3 to 5, more preferably 0.5 to 2, and still more preferably 0.5 to 1.5.

The skin detergent composition according to any one of the above-mentioned <1> to <21> wherein, in the component (A) and the component (B), the carbon number of R ^{2 in} the formula (2) The mass ratio of the fatty acid (component (B-1)) which is an alkyl group of 15 to 21 is preferably (A) / (B-1) = 0.2 to 5, more preferably 0.3 to 3.5, and further preferably It is 0.3~2, and more preferably 0.4~2.

<23> A skin detergent composition according to any one of the above <1> to <22> The component (C) is preferably a cationized cellulose, a cationized starch, a cationized guar gum, a cationized tara gum, a cationized locust bean gum, a cationized fenugreek gum, a cationized xanthan gum, and two Polymer of allyl dialkyl quaternary ammonium salt, diallyl dialkyl quaternary ammonium salt / acrylamide copolymer, diallyl dialkyl quaternary ammonium salt / acrylamide / acrylic acid Copolymer, vinyl imidazolium trichloride / vinyl pyrrolidone copolymer, hydroxyethyl cellulose / dimethyl diallyl ammonium chloride copolymer, vinyl pyrrolidone / quaternized a Dimethylaminoethyl acrylate copolymer, polyvinylpyrrolidone/alkylamino acrylate copolymer, polyvinylpyrrolidone/alkylamino acrylate/vinyl caprolactam copolymer , vinyl pyrrolidone / methacrylamide propyl propyl trimethyl ammonium chloride copolymer, alkyl acrylamide / acrylate / alkyl amino alkyl acrylamide / polyethylene glycol methacrylate Copolymer, adipic acid/dimethylaminohydroxypropyl-ethyltriamine copolymer (US The cationic polymer described in the Japanese Patent Laid-Open Publication No. SHO-63-139734, and the Japanese Patent Publication No. Sho 60-36407, more preferably selected from the group consisting of diallyl dialkyl quaternary ammonium One or more of a salt/acrylamide copolymer, a diallyldialkyl quaternary ammonium salt/acrylamide/acrylic acid copolymer, a cationized guar gum, and a cationized cellulose.

The skin detergent composition according to any one of the above-mentioned items, wherein the component (C) may be used alone or in combination, and more preferably 0.1% by mass or more, and more preferably all of the components. 0.5% by mass or more, preferably 5 The mass% or less is more preferably 2% by mass or less, and more preferably 0.1 to 5% by mass, and more preferably 0.5 to 2% by mass, based on the total composition.

The skin detergent composition according to any one of the above-mentioned items, wherein the base of the component (D) is preferably a hydroxide of an alkali metal of sodium hydroxide or potassium hydroxide. An amine; an organic amine compound of triethanolamine; a basic amino acid of arginine, more preferably potassium hydroxide.

The skin cleansing composition of any one of the above-mentioned <1> to <25>, wherein the component (D) is compared with the molar ratio of the components (A) and (B) (ingredient (D)/ (Component (A) + component (B)) is preferably from 0.9 to 1.1, more preferably from 0.95 to 1.05.

The skin detergent composition according to any one of the above-mentioned items <1> to <27> which further contains the component (E) water as a solvent, and the content of all the components is preferably 10% by mass or more, more preferably 15% by mass or more, more preferably 30% by mass or more, more preferably 96% by mass or less, still more preferably 90% by mass or less, still more preferably 87% by mass or less, still more preferably 85% by mass or less, and further preferably It is preferably from 10 to 96% by mass, more preferably from 15 to 90% by mass, even more preferably from 30 to 87% by mass, based on the total composition.

<28> The skin detergent composition according to any one of the above <1> to <27> which further preferably contains (F) a polyol.

<29> The skin detergent composition according to the above <28>, wherein, as the component (F) polyol, sorbitol, glycerin, butylene glycol, propylene glycol, dipropylene glycol, erythritol, mannitol is preferred. , xylitol, more preferably glycerin, sorbitol.

<30> A skin detergent composition according to the above <28> or <29>, which In the above, the polyol of the component (F) may be used alone or in combination, and is preferably contained in an amount of 1% by mass or more, more preferably 5% by mass or more, more preferably 40% by mass or less, and still more preferably 30% by mass based on the total composition. Hereinafter, in all the compositions, it is preferably 1 to 40% by mass, more preferably 5 to 30% by mass.

The skin cleansing composition of any one of the above-mentioned <1> to <30>, wherein the skin cleansing composition of the present invention is produced by mixing the formulated components by a usual method. The detergent composition may be in the form of a liquid or a solid. In the case of a liquid, the viscosity at a measurement of a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) at 25 ° C is preferably 200~. 80000 mPa. s.

The skin detergent composition according to any one of the above aspects, wherein the pH of the skin detergent composition of the present invention is preferably from 3 to 12, more preferably from 5 to 5. 10.5, further preferably 5-7.

The skin cleansing composition according to any one of the above-mentioned items, wherein the skin cleansing composition of the present invention is suitable for use in a facial cleanser, a body soap, a hand soap, preferably. For facial cleanser, body soap.

<34> A skin cleansing method according to any one of the above <1> to <33>, which is applied to the skin part of the body and washed, and then rinsed.

The use of the skin cleansing composition according to any one of the above <1> to <33>, which is used for the manufacture of a detergent which is applied to the skin and which is washed with a foam.

(test methods)

In the present invention, the alkyl group composition of the alkyl ether carboxylic acid, the EO addition molar distribution, and the ratio of each component are determined by gas chromatography (GC, Gas Chromatography) and determined by the following analytical methods. .

(GC analysis conditions)

GC equipment: manufactured by Agilent Technologies, 7890A

Pipe column: manufactured by Agilent Technologies, DB-5

(30 m, inner diameter 0.25 mm, film thickness 0.25 μm)

Detector: FID (Flame Ionization Detector)

Carrier: Helium, 1 mL/min

Heating conditions: The temperature was raised from 100 ° C to 325 ° C at 5 ° C / min. Thereafter, it was kept at 325 ° C for 35 minutes.

(Pretreatment method of sample)

Dissolve 150 mg of alkyl ether carboxylic acid using 50 mL of methanol. Further, regarding the detergent composition, the alkyl ether carboxylic acid was extracted to 150 mg, and dissolved in 50 mL of methanol. In the case where the detergent composition contains a strong anionic surfactant such as polyoxyethylene ethyl ether sulfate, it is extracted in such a manner that it is 250 mg or less. 1 mL of this solution was extracted and applied to a solid phase filter cartridge (manufactured by Biotage, Isolute SAX, 1 g, 3 mL, 500-0100-B) adjusted in advance with 4 mL of methanol in a 10 mL round bottom test tube. Capture through the fluid. Thereafter, it was eluted by using 6 mL of a solution obtained by adding 100 mL of methanol to 4.6 g of formic acid, and the solution was also captured to the phase. In the same tube. The captured solution was placed in a block heater heated to 50 ° C, nitrogen gas was blown in, concentrated to about 1 mL, and then nitrogen gas was blown at room temperature to dry. 2 mL of a diazomethane-ether solution was added thereto, and the mixture was allowed to stand at room temperature for 10 minutes while stirring to carry out derivatization. Thereafter, nitrogen gas was blown at room temperature and concentrated until it became 500 μL or less, and then chloroform was added to prepare 500 μL, which was then supplied to GC analysis.

Further, the diazomethane-ether solution was prepared using a diazomethane generating apparatus (manufactured by Miyamoto Riken Industrial Co., Ltd., GM-50) in the following order. The first and second adapters, the second and third adapters are connected by a rubber plug and a Teflon (registered trademark) pipe. In the second adapter, 0.8 g of N-methyl-N'-nitro-N-nitrosoguanidine was extracted, and 2.5 mL of ion-exchanged water was added. 10 mL of the third butyl methyl ether was extracted from the third adapter. The first, second, and third adapters are cooled by ice. Then, a plastic syringe was attached to the second adapter, and 3 mL of a solution obtained by dissolving 20 g of sodium hydroxide in 100 mL of ion-exchanged water was added to the syringe. The sodium hydroxide aqueous solution was slowly added dropwise to form diazomethane gas, nitrogen gas was slowly blown from the first adapter side, and the third butyl methyl ether of the third adapter was dissolved to obtain a diazomethane-ether solution. .

The reagents used in the pretreatment of the above samples were as follows.

Methanol (manufactured by Kanto Chemical Co., Ltd., high-speed liquid chromatography, 25183-1B)

Formic acid (made by Wako Pure Chemical Industries, special grade reagent, 066-00461)

Chloroform (made by Kanto Chemical, deer (Cica) level, 07278-01)

N-methyl-N'-nitro-N-nitrosoguanidine (made by Kanto Chemical, deer level, 25596-51)

Third butyl methyl ether (manufactured by Kanto Chemical Co., Ltd., Deer grade, 04418-00)

Sodium hydroxide (made by Wako Pure Chemical Industries, special grade, 196-13761)

The alkyl ether carboxylic acid of the component (A) used in the skin detergent composition of the present invention can be produced, for example, in the following manner. In addition, unless otherwise indicated, "%" represents mass %.

[Manufacturing Example 1]

In a stainless steel autoclave equipped with a stirring and temperature-regulating function, lauryl alcohol [trade name: Kalcol 2098, manufactured by Kao] 1144 g (6.14 mol), myristyl alcohol [trade name: Kalcol 4098, manufactured by Kao] 60.2 g was added. (0.281 mol), potassium hydroxide 2.68 g (0.0478 mol), dehydrated under reduced pressure. Then, 996 g (22.6 mol) of ethylene oxide (EO) was introduced at 155 ° C, and the reaction was carried out for 2 hours at a reaction temperature of 155 ° C and a reaction pressure of 0.4 MPa. After completion of the reaction, the mixture was stirred at 80 ° C under a reduced pressure of 6 kPa for 30 minutes to remove unreacted ethylene oxide, and then nitrogen gas was introduced to be normal pressure, which was 90% of 4.82 g (0.0482 mol). Lactic acid was added to the autoclave and stirred at 80 ° C for 30 minutes to obtain an alkyl ethoxylate having an EO addition molar amount of 3.55 mol (hereinafter also referred to as "Alkyl Ethoxylate").

In the glass reaction vessel equipped with a stirring function, a temperature adjustment function and an oxygen introduction tube, 90 g (0.2 mol) of the above product and 16.7 g of a 48% aqueous sodium hydroxide solution (0.2 mol in terms of sodium hydroxide) were respectively added. Ear), palladium-platinum-ruthenium catalyst (activated carbon supported palladium 4%, platinum 1% and 铋 5%, moisture content 50%) 0.9 g, water 494.4 g. Under the stirring conditions, the liquid temperature was raised to 70 ° C, and oxygen gas was blown in a ratio of 27 mol % (produced AE / time) while conducting a contact oxidation reaction at a reaction temperature of 70 ° C for 3.5 hours. The reaction rate was 89%.

After completion of the reaction, the catalyst was separated by filtration from the reaction liquid to obtain an aqueous solution of an alkyl ether carboxylic acid Na salt. Then, 35% hydrochloric acid was added, and a liquid separation operation was carried out to obtain an alkyl ether carboxylic acid. Set it to EC1.

As a result of analysis by gas chromatography, with respect to EC1, in the formula (1), M = H, R ¹ is lauryl/myristyl = 95/5, the average carbon number is 12.1, and the average value of n is 2.8. The content of the component including n=0 was 14.7% by mass, and the total amount of the component of n=1 and the component of n=2 was 36.1% by mass.

Further, the ratio on EO adduct molar number of different components, the composition according to the result of the measurement of the maximum consisting of R ¹ is the value calculated for the (n = 0 by mass of the component) :( n = mass of the component 1) : (the mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1: 1.22: 1.23: 1.06: 0.83.

[Manufacturing Example 2]

In the same manner as in Production Example 1, sterol was produced at a mass ratio of 10/70/15/5 [trade name: Kalcol 1098, manufactured by Kao], lauryl alcohol [trade name: Kalcol 2098, manufactured by Kao], myristyl alcohol [product name: Kalcol 4098, manufactured by Kao], cetyl alcohol [trade name: Kalcol 6098, manufactured by Kao] is reacted with EO to obtain EO addition molar number 3.55 mole alkyl ethoxylation Things. An oxidation reaction was carried out in the same manner as in Production Example 1, and the obtained alkyl ether carboxylate was subjected to hydrochloric acid treatment to obtain an alkyl ether carboxylic acid.

As a result of gas chromatography, in the formula (1), M = H, R ¹ is a decyl group / lauryl / myristyl / palmity = 10/70/15/5, and the average carbon number is 12.3. The average value of n was 3.3, and the component containing n=0 was 15.2% by mass, and the total amount of the component of n=1 and the component of n=2 was 31.4% by mass.

Further, the ratio of each component having a different EO addition molar number is calculated based on the measured value of the largest component in the composition of R ¹ (the mass of the component of n = 0): (the mass of the component of n = 1) : (mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1: 1.07: 1.00: 0.85: 0.67.

[Manufacturing Example 3]

To a glass reaction vessel equipped with a stirring and temperature-adjusting function, 372 g (2.00 mol) of lauryl alcohol was added, and the temperature of the liquid was raised to 70 ° C under stirring, and 256 g of sodium monochloroacetate (2.20) was added in portions. Mohr) and sodium hydroxide 88 g (2.20 mol) were reacted for 5 hours. After completion of the reaction, the precipitate was separated by filtration, and then 35% hydrochloric acid was added for acid formation to obtain an alkyl ether carboxylic acid (in the formula (1), M = H, R ¹ is lauryl, n = 0). .

[Manufacturing Example 4]

Following the production example 1, decyl alcohol was used as a raw material and reacted with EO to obtain an alkyl ethoxylate having an EO addition molar number of 3.55 mol. The oxidation reaction was carried out in the same manner as in Production Example 1, and the obtained alkyl ether carboxylate was subjected to the reaction. Hydrochloric acid treatment gives an alkyl ether carboxylic acid.

The results of gas chromatography analysis, the general formula (1), M = H, R ¹ is a decyl group, n is an average value of 3.1, n = ingredient comprising 16 mass% of 0, and n = 1 component of The total amount of the components with n = 2 was 37% by mass.

[Manufacturing Example 5]

In the same manner as in Production Example 1, lauryl alcohol was used as a raw material and reacted with EO to obtain an alkyl ethoxylate having an EO addition molar number of 3.55 mol. An oxidation reaction was carried out in the same manner as in Production Example 1, and the obtained alkyl ether carboxylate was subjected to hydrochloric acid treatment to obtain an alkyl ether carboxylic acid.

As a result of analysis by gas chromatography, in the formula (1), M = H, R ¹ is a lauryl group, the average value of n is 3.1, and the component containing n = 0 is 16% by mass, and the component of n = 1 The total amount of the components with n = 2 was 37% by mass.

[Manufacturing Example 6]

Following the production example 1, the myristyl alcohol was used as a raw material and reacted with EO to obtain an alkyl ethoxylate having an EO addition molar number of 3.55 mol. An oxidation reaction was carried out in the same manner as in Production Example 1, and the obtained alkyl ether carboxylate was subjected to hydrochloric acid treatment to obtain an alkyl ether carboxylic acid.

As a result of analysis by gas chromatography, in the formula (1), M = H, R ¹ is a myristyl group, the average value of n is 3.1, and the component containing n = 0% by mass, and n = 1 The total amount of the component and the component of n=2 was 37% by mass.

[Manufacturing Example 7]

Model 1 was used to mix lauryl alcohol and cetyl alcohol at a mass ratio of 20/80. The resulting material was subjected to EO addition, and an EO addition of a molar amount of 3.55 moles of alkyl ethoxylate was obtained. An oxidation reaction was carried out in the same manner as in Example 1, and the obtained alkyl ether carboxylate was subjected to hydrochloric acid treatment to obtain an alkyl ether carboxylic acid.

As a result of analysis by gas chromatography, in the general formula (1), M = H, R ¹ is a lauryl/palmityl group = 20/80, an average value of n is 3.1, and a component containing n = 0% by mass is 16% by mass. The total amount of the component of n=1 and the component of n=2 was 37% by mass.

[Manufacturing Example 8]

In the same manner as in Production Example 1, lauryl alcohol was used as a raw material and reacted with EO to obtain an alkyl ethoxylate having an EO addition molar number of 4.05 mol. An oxidation reaction was carried out in the same manner as in Production Example 1, and the obtained alkyl ether carboxylate was subjected to hydrochloric acid treatment to obtain an alkyl ether carboxylic acid.

As a result of analysis by gas chromatography, in the formula (1), M = H, R ¹ is a lauryl group, the average value of n is 3.5, and the component containing n = 0 is 11.4% by mass, and the component of n = 1 The total amount of the components with n = 2 was 30.6 mass%.

Further, the ratio of each component having a different EO addition molar number is calculated based on the measured value of the largest component in the composition of R ¹ (the mass of the component of n = 0): (the mass of the component of n = 1) : (mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1: 1.31:1.38: 1.25: 1.06.

[Manufacturing Example 9]

In a stainless steel autoclave equipped with a stirring and temperature-regulating function, lauryl alcohol [trade name: Kalcol 2098, manufactured by Kao] 1144 g (6.14 mol), myristyl alcohol [trade name: Kalcol 4098, manufactured by Kao] 60.2 g was added. (0.281 mol), potassium hydroxide 2.6 g (0.0478 mol), dehydration under reduced pressure. Then, 718 g (16.3 mol) of ethylene oxide (EO) was introduced at 155 ° C, and the reaction was carried out for 2 hours at a reaction temperature of 155 ° C and a reaction pressure of 0.4 MPa. After completion of the reaction, the mixture was cooled, stirred at 80 ° C under a reduced pressure of 6 kPa for 30 minutes to remove unreacted ethylene oxide, and then introduced into a normal pressure to give 4.82 g (0.0482 mol). 90% lactic acid was added to the autoclave and stirred at 80 ° C for 30 minutes to obtain an alkyl ethoxylate having an EO addition molar amount of 2.55 mol.

600 g (2.00 mol) of the above product was added to a glass reaction vessel equipped with a stirring and temperature-adjusting function, and the temperature of the liquid was raised to 70 ° C under stirring, and 256 g of sodium monochloroacetate (2.20) was added in portions. Mohr) and sodium hydroxide 88 g (2.20 mol) were reacted for 5 hours. After completion of the reaction, 35% hydrochloric acid was added until the pH became 2.8, acidification was carried out, and the oil layer was separated to obtain an alkyl ether carboxylic acid. Set it to EC6.

As a result of gas chromatography, in the formula (1), M = H, R ¹ is a lauryl/myristyl group = 94/6, the average carbon number is 12.1, and the average value of n is 3.1, including n. The component of =0 was 9.9 mass%, and the total amount of the component of n=1 and the component of n=2 was 35.4 mass%.

Further, the ratio of each component having a different EO addition molar number is calculated based on the measured value of the largest component in the composition of R ¹ (the mass of the component of n = 0): (the mass of the component of n = 1) : (the mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1: 1.65: 1.92: 1.74: 1.32.

In the following examples, the alkyl ether carboxylic acid obtained in Production Example 5, Production Example 6, and Production Example 7 was mixed at a mass ratio of 78.75/15/6.25 in terms of mass ratio, and was set as EC2.

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

In the following examples, with respect to EC4, the EC1 obtained in Production Example 1 and the alkyl ether carboxylic acid obtained in Production Example 4 were mixed at a ratio of 40/60 by mass ratio, respectively, and set to EC4. .

In the following examples, regarding the EC5, the alkyl ether carboxylic acid obtained in Production Example 2 and Production Example 8 was mixed at a ratio of 40/60 by mass ratio, and was set to EC5.

[Examples] [Examples 1 to 15 and Comparative Examples 1 to 4]

A skin detergent composition of the composition shown in Tables 2 to 6 was produced, and the degree of elasticity and no tightness of the foam was evaluated. The results are shown together in Tables 2 to 6.

Further, the composition of the component (A) used in the examples is shown in Table 1.

(Production method)

Purification of water to component (E) (removal of component (E) equivalent to 5 times the amount of component (C) The component (D) was added to the original product, and after heating, it was heated to 75 °C. To the aqueous solution, a liquid obtained by dissolving the components (A) and (B) at 70 ° C and mixing them was added, and the mixture was stirred until uniform. Thereafter, the component (F) was added as needed, stirred until uniform, and cooled to 25 °C. Then, a component (E) equivalent to five times the amount of the component (C) is mixed with the component (C), and the mixture is stirred until it becomes uniform to obtain a skin detergent composition.

(evaluation method)

(1) The elasticity of the bubble:

After the foaming net [manufactured by Baiyuan Co., Ltd.] was moistened with water (about 8 g), 1 g of the detergent was placed on the foaming net. Wrap the bubble net with the palm of both hands, and rub the palms of the hands to rub each other with a 40-degree circle.

The cleaved foam was collected into a Petri dish (6.6 cm in diameter and 1.8 cm in height) to remove excess foam by using a ruler to make the liquid level consistent with the height of the Petri dish and flattened. For the determination of the elasticity of the foam, use the FUDOH rheometer RTC (manufactured by Immobilization Co., Ltd.), and use the special adapter 3 (compression elastic measurement adapter). =5). An adapter was placed on the surface of the foam on the Petri dish, and the sampling period was set to 0.1 second, the stroke was set to 20 mm, the speed was set to 30 cm/min, and the display was set to g unit, and the liquid temperature of the foam was about 25 ° C. The stroke direction is set to the top and bottom to measure the stress on the adapter. Among the measured values obtained, the value at which the load applied by the adapter is maximum is set as the elastic force, and the numerical values displayed by the rheometer are shown in the table.

(2) The degree of no tightness:

Each of the professional inspectors used 1 g of the skin detergent composition to wash the surface with 1 g of water, and after rinsing with water, the sensation of the tightness immediately after drying with a towel was evaluated by the following criteria, and the total score was obtained. .

3: Not tight.

2: Almost no tension.

1: A little tight.

0: Tight.

[Example 16]

A skin detergent composition having the composition shown below was produced in the same manner as in Examples 1 to 15.

*1: Merquat Plus 3331 (Lubrizol Advanced Materials, Inc.)

*2: Active ingredient of Amphitol 20HD (Kao)

The obtained skin detergent composition has a fine foam texture and excellent elasticity, and the skin after the cleaning is moistened without feeling a tight feeling.

[Example 17]

A skin detergent composition having the composition shown below was produced in the same manner as in Examples 1 to 15.

*3: Jaguar C-17K (Rhodia Operations (Novecare))

*4: The active ingredient of Penetol GE-EH (King)

The obtained skin detergent composition has a fine foam texture and excellent elasticity, and the skin after the cleaning is moistened without feeling a tight feeling.

Claims (13)

A skin detergent composition comprising the following components (A), (B), (C), (D) and (E): (A) alkyl ether carboxylic acid 1 to 20% by mass, which is Formula (1): R ¹ -O-(CH ₂ CH ₂ O) _n -CH ₂ -COOH (1) wherein R ¹ represents an alkyl group having 4 to 22 carbon atoms, and n represents a number of 0 to 20 The average carbon number of R ¹ is 10.8 to 12.8, and the component containing n=0 is 4.3 to 30% by mass, and 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. (B) fatty acid 1 to 20% by mass, which is represented by the formula (2): R ² -COOH (2) wherein R ² represents a linear or branched alkyl group or alkene having 9 to 21 carbon atoms; (C) cationic polymer 0.1 to 5 mass%; (D) base; (E) water; and at least a part of the components (A) and (B) and the component (D) are present in the form of a salt, the component ( D) The molar ratio (component (D) / (component (A) + component (B))) of the components (A) and (B) is 0.9 to 1.1. The skin detergent composition of claim 1, further comprising (F) a polyol. The scope of the patent skin cleansing composition of item 1, wherein the component (B) comprising lines formula (2), R ² of carbon number of fatty acid of 15 to 21% by mass of 40 to 100. The skin detergent composition of claim 1, wherein the mass ratio of the components (A) and (B) to the acid is (A) / (B) = 0.3 to 5. The skin detergent composition of claim 1, wherein in the component (A), the average value (the average addition molar number) of n in the formula (1) is 1.5 to 10. The skin detergent composition of claim 1, wherein in the component (A), in the formula (1), R ¹ is an alkyl group having 6 to 20 carbon atoms, and the average value of n is 2.5~ 4.5, and contains 9.6 to 27% by mass of the component of n=0. The skin detergent composition of claim 1, wherein in the component (A), in the formula (1), R ¹ is an alkyl group having 8 to 18 carbon atoms, and an average value of n is 2.5 3.4, and contains 9.6 to 27% by mass of the component of n=0. The skin detergent composition of claim 1, wherein in the component (A), in the formula (1), R ¹ is an alkyl group having 8 to 16 carbon atoms, and an average value of n is 2.8. 3.4, the component containing n=0 is 9.6 to 27 mass%, and the component of n=1 and the component of n=2 are 27 to 36.5 mass% in total. The skin detergent composition of claim 1, wherein in the component (A), in the formula (1), the mass of the component (n = 0): (the mass of the component of n = 1) ): (the mass of the component of n=2): (the mass of the component of n=3): (the mass of the component of n=4)=1: 0.99~3.50: 0.89~3.00: 0.76~3.00: 0.63~1.6. The skin detergent composition of claim 1, wherein in the component (A), in the formula (1), R ¹ contains two or more alkyl groups and has the highest alkyl chain length. The composition is 55 mass% or more and less than 97 mass%. The skin detergent composition of the first aspect of the invention, wherein the component (1) contains, in the formula (1), the component of n=0 is 8 mass% or more and less than 12 mass%, and becomes (the mass of the component of n = 0): (the mass of the component of n = 1): (the mass of the component of n = 2): (the mass of the component of n = 3): (the mass of the component of n = 4) = 1:1.53~1.87:1.59~2.25:1.33~2.16:1.14~1.52, or 12% by mass or more and 17% by mass or less of the component containing n=0, and become (the mass of the component of n=0): (n= The mass of the component of 1): (the mass of the component of n=2): (the mass of the component of n=3): (the mass of the component of n=4)=1: 0.99~1.34: 0.89~1.40: 0.76~1.23 : 0.63~0.99. A use of the skin cleansing composition of claim 1 of the patent application, which is applied to the washing of the skin part of the body. A use of the skin cleansing composition of claim 1 for the manufacture of a detergent for application to the skin for washing with a foam.