JP2015229650A - Skin cleansing composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin cleansing composition which is excellent in foaming or a feeling of thickness and viscosity of foam when cleansing, is excellent in smoothness and a stop feeling when rinsing, has no feeling of remaining after rinsing, and can give a moist feeling.SOLUTION: The invention provides a skin cleansing composition containing: (A) 1-8 mass% of alkyl ether carboxylic acid or a salt thereof represented by a general formula (1) in which the average carbon numbers of Ris 10.8-12.8, 4.3-30 mass% of the component of n=0 is contained, the component of n=1 and the component of n=2 are contained in total amount of less than 40 mass%; (B) 8-16 mass% of alkyl or alkenyl carboxylic acid with carbon number 9-21; (C) 0.5-7 mass% of an amphoteric surfactant; (D1) cationized polymer; nonionic gums; and denatured nonionic cellulose. (Ris an alkyl group with carbon number 4-22; n is 0-20; M is an H, alkali metal, alkaline earth metal, ammonium, or organic ammonium.)

Description

  The present invention relates to a skin cleansing composition.

Conventionally, a detergent composition excellent in detergency, foam quality, smooth feel and the like has been studied.
For example, in Patent Document 1, a detergent composition containing a specific amphoteric surfactant and a cationic sugar derivative realizes a rich and smooth foam at the time of washing, and provides rinsing properties and sliding properties at the time of rinsing, A detergent composition is described that provides an after-feel, smoothness and moist feeling after use. Further, in Patent Document 2, a skin cleansing composition containing a specific alkyl ether carboxylic acid or a salt thereof, a cellulose to which a hydroxyethyl group or a hydroxypropyl group is added, and an anionic surfactant is excellent in foaming and foam. It is described that a feeling of thickness comes out, the skin feels soft during washing, and gentleness can be realized. Furthermore, Patent Document 3 discloses that a skin cleanser composition containing a specific alkyl ether carboxylic acid, a fatty acid, and a neutralizer in a specific ratio is excellent in foam quality, amount of foam and rinsing properties, and has a high detergency. Is described.

JP 2011-84484 A JP 2013-184914 A JP 2013-209371 A

Conventional skin cleansing compositions have been focused on development in terms of functions such as cleanability and rinsability. However, in recent years, due to the increase in required characteristics and health consciousness, in addition to the above functional aspects as a cleaning agent, added value such as an image at the time of use (feeling of soft skin and smooth skin) has been required. I came.
The present invention relates to a skin cleanser composition that is excellent in foaming, foam thickness and thickness during washing, excellent in smoothness and stop feeling during rinsing, has no residual feeling after rinsing, and provides a moist feeling.

  The inventors of the present invention have developed a skin cleansing composition comprising a combination of an alkyl ether carboxylic acid having a specific distribution or a salt thereof, a fatty acid, an amphoteric surfactant, and a specific three types of polymers. It has been found that it has excellent thickness and thickness, is excellent in smoothness and stop feeling during rinsing, has no residual feeling after rinsing, and has a moist feeling.

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

(In the formula, R ¹ represents an alkyl group having 4 to 22 carbon atoms, n represents a number of 0 to 20, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or organic ammonium).
Wherein R ^{1 has} an average carbon number of 10.8 to 12.8, contains 4.3 to 30% by mass of n = 0, and n = 1 An alkyl ether carboxylic acid or a salt thereof containing 1 to 8% by mass,
(B) General formula (2)

(Wherein R ² represents an alkyl group or alkenyl group having 9 to 21 carbon atoms, R ² includes at least an alkyl group having 11 carbon atoms, and R ^{2 has} an average carbon number of 11 to 15)
8 to 16% by mass of a fatty acid represented by
(C) Amphoteric surfactant 0.5-7% by mass,
(D1) a cationized polymer having a charge density of 0.5 to 4.5 meq / g,
(D2) nonionic gums,
(D3) Nonionic cellulose to which hydroxyethyl group or hydroxypropyl group is added, and the mass ratio of fatty acids having 11 alkyl groups to all fatty acids (fatty acids having 11 alkyl groups / total fatty acids) is , 0.5 to 1 for a skin cleanser composition.

The skin cleansing composition of the present invention has excellent foaming and foam thickness feeling during washing, thickness, excellent smoothness and stop feeling during rinsing, no residual feeling after rinsing, and a moist feeling. A cleaning composition is provided.
One of the features of the skin cleansing composition of the present invention is that it can provide thick foam. Even if the conventional skin cleansing composition is a foam that is easy to move when spread slowly, under the conditions that the foam is spread quickly as in actual use, the foam is more likely to move and the degree of feeling of the foam It was a decrease. However, in the present invention, even when the foam is quickly expanded, the weight of the foam and the volume of the foam increase (because of the presence of the foam), and the whole body is washed with a smooth, thick and smooth foam. It is possible to feel soft skin with moist and smooth skin.
That is, in the present invention, the thick foam means that the foam is easy to move when the foam is slowly spread on the skin, but when the foam is spread quickly, the volume of the foam is increased and the foam becomes difficult to move.

The alkyl ether carboxylic acid of component (A) or a salt thereof 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, more preferably an alkyl group having 8 to 18 carbon atoms, 8 to 16 carbon atoms, and further 10 to 10 carbon atoms. 16 alkyl groups are more preferred. 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. The average carbon number of R ¹ is 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, although n shows the addition mole number of ethylene oxyoxide, the average addition mole number (average value of n) in a composition of a component (A) is 1.5-10 from the point that foaming is favorable. Preferably, 2.5 to 6.4 is more preferable, 2.5 to 3.7 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) or a salt thereof is 4.3 to 30% by mass, preferably 4.9 to 27% by mass, more preferably 9. 6 to 27% by mass, more preferably more than 9.6% by mass and 27% by mass or less, preferably 9.8 to 27% by mass, more preferably 9.9 to 27% by mass, and still more preferably 9. 9 to 16% by mass, more preferably 9.9 to 15% by mass. By setting it within this range, the foam amount and foam quality are excellent.
Furthermore, it contains less than 40% by mass in total of n = 1 component and n = 2 component, preferably 21% by mass or more and less than 40% by mass, more preferably 27-37% by mass, and further preferably 27-36.5%. It is preferable from a viewpoint of foam quality and the amount of foam to contain 35 mass%, and still more preferably 35-36.1 mass%.

  In the formula, M represents a hydrogen atom; an alkali metal such as sodium or potassium; an alkaline earth metal such as calcium or magnesium; an ammonium; an ammonium derived from an alkanolamine such as monoethanolamine, diethanolamine or triethanolamine; Can be mentioned. Among these, alkali metals are preferable from the viewpoints of foamability, low-temperature stability, and lack of coloration over time.

In the general formula (1), the alkyl ether carboxylic acid of the component (A) or a salt thereof is an alkyl having the maximum content in the composition of R ¹ in which the mass ratio of the components n = 0, 1, 2, 3, 4 is R ^1. In the chain length 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 3.50: 0.89 to 3.00: 0.76 to 3.00: 0.63 to 1.6, foaming property, detergency, squeaky feeling during rinsing From the viewpoint of compatibility, it is preferable.

Further, in the general formula (1), the component of n = 0 include less than 9.9 wt% 12 wt%, in the alkyl chain length components of the maximum content of the composition of R ^1, the (n = 0 component mass ): (Mass of n = 1 component): (mass of n = 2 component): (mass of n = 3 component): (mass of n = 4 component) = 1: 1.53-1.87: 1. 59 to 2.25: 1.33 to 2.16: 1.14 to 1.52, or 12 to 17% by mass of the n = 0 component, and the maximum among the compositions of R ¹ In the alkyl chain length component of content, (mass of n = 0 component): (mass of n = 1 component): (mass of n = 2 component): (mass of n = 3 component): (n = 4 component) Mass) = 1: 0.99 to 1.34: 0.89 to 1.40: 0.76 to 1.23: 0.63 to 1 is preferable from the viewpoints of foam quality and foam amount.

Further, in the general formula (1), the component of n = 0 contains 9.9 to 11.5% by mass, and in the alkyl chain length component of the maximum content in the composition of R ¹ , (mass of n = 0 component) : (N = 1 component mass): (n = 2 component mass): (n = 3 component mass): (n = 4 component mass) = 1: 1.58-1.84: 1.72 To 2.17: 1.49 to 2.00: 1.14 to 1.52, or, in the general formula (1), the component of n = 0 is contained in an amount of 13 to 15% by mass, and the composition of R ¹ In the maximum alkyl chain length component, (n = 0 component mass): (n = 1 component mass): (n = 2 component mass): (n = 3 component mass): (n = Mass of four components) = 1: 1.00 to 1.31: 0.93 to 1.34: 0.79 to 1.18: 0.63 to 1 in terms of foam quality and amount of foam To preferred.

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, and the average value of the number of added moles of n is 1.5 to 10, It is 2.5-6.4, It is preferable to contain 9.8-27 mass% of the component of n = 0, and 27-37 mass% of the component of n = 1 and the component of n = 2 in total. In the formula, M is preferably a hydrogen atom, sodium, potassium, or ammonium. In this way, foaming can be accelerated.

In the component (A), in the general formula (1), R ¹ is preferably 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 from 0 to 20, the average value of n is 2.5 to 3.7, and n = It is preferable to contain 9.8 to 27% by mass of 0 component and 27 to 37% by mass in total of n = 1 component and n = 2 component. In the formula, M is preferably a hydrogen atom, sodium, potassium, or ammonium. 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, and the average value of n is 2.5 to 3.4. It is preferable to contain 9.9 to 27% by mass of 0 component and 27 to 36.5% by mass in total of n = 1 component and n = 2 component. In the formula, M is preferably a hydrogen atom, sodium, potassium, or ammonium. By doing in this way, the stop feeling property at the time of a rinse can be strengthened. In the present invention, the stop feeling refers to a feeling that the palm stops at the end of rinsing when the cleaning composition is applied and washed.

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 of n is 2.8 to 3.4, and n = 0 Is preferably 9.9 to 16% by mass and contains 27 to 36.5% by mass in total of n = 1 and n = 2. In the formula, M is preferably a hydrogen atom, sodium, potassium, or ammonium. 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 70 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 Is preferably 9.9 to 15% by mass and contains 35 to 36.1% by mass in total of n = 1 and n = 2. In the formula, M is preferably a hydrogen atom, sodium, potassium, or ammonium. By doing in this way, foam amount and foam quality 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 the 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 amount of n = 0, total amount 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 set to 100%, and the total amount 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 mass 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 composition of R ¹ The alkyl chain length component was identified from the area ratio of n = 0, n = 1, n = 2, n = 3, and n = 4 of the maximum component.

  The component (A) alkyl ether carboxylic acid or salt thereof has the composition as described above, and the content is foaming, foam thickness, smoothness when rinsing, stop feeling when rinsing, and towel From the viewpoint of improving moist feeling after drying, the acid content in the entire composition is 1% by mass or more, preferably 2% by mass or more, more preferably 3% by mass or more, and 8% by mass or less, and 5% by mass or less. Is preferable, and 4 mass% or less is more preferable. Moreover, content of a component (A) is 1-8 mass% as an acid in the whole composition, 2-5 mass% is preferable, and 3-4 mass% is more preferable.

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, and from the viewpoint of improving the speed of foaming and the feeling of foam thickening, the alkyl group or alkenyl group having 11 to 17 carbon atoms is preferable. An alkyl group having 11 to 15 carbon atoms is more preferable.
More specifically, for example, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachidic acid, behenic acid and the like can be mentioned.
Further, R ² comprises at least an alkyl group having a carbon number of 11, the average number of carbon atoms in R ² is 11 to 15, from the viewpoint of improving the fast foaming, 11-13 preferably, from 11.5 to 12. 5 is more preferable, and 11.5 to 12 is even more preferable.

Furthermore, the mass ratio of the fatty acid having an alkyl group having 11 carbon atoms to the total fatty acid in the skin cleansing composition (fatty acid having 11 alkyl groups / total fatty acid) is the speed of foaming and the feeling of foam thickness. From the viewpoint of improving the ratio, it is 0.5 to 1, preferably 0.50 to 0.80, and more preferably 0.55 to 0.60.
The mass ratio of fatty acids having 11 alkyl groups to fatty acids other than fatty acids having 11 alkyl groups (fatty acids other than fatty acids having 11 alkyl groups / fatty acids having 11 alkyl groups). ) Is preferably from 0.4 to 0.9, more preferably from 0.45 to 0.8, and even more preferably from 0.48 to 0.7, from the viewpoint of improving the thickness feeling of the foam and the thick feeling of the foam. 0.5 to 0.65 is even more preferable.

  The fatty acid of component (B) has the composition as described above, and its content is 8 to 16% by mass in the total composition from the viewpoint of improving foaming, foam thickness feeling, and speed of foaming. 10 to 15% by mass is preferable, and 13.5 to 14.5% by mass is more preferable.

The amphoteric surfactant of the component (C) used in the present invention is not limited as long as it is used in ordinary detergents. For example, betaine acetate type surfactants such as lauryldimethylaminoacetic acid betaine, lauryldimethylamine oxide Amine oxide type surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and the like, and amide betaine type surfactants such as lauric acid amidopropyl betaine And sulfobetaine-type surfactants such as laurylhydroxysulfobetaine.
Of these, amide betaine surfactants such as lauric acid amidopropyl betaine and sulfobetaine surfactants such as lauryl hydroxysulfobetaine are preferable from the viewpoint of improving the speed of foaming and the usability of the detergent composition. .

  One or more amphoteric surfactants of component (C) can be used, and the content thereof is 0.5 to 7% by mass in the total composition from the viewpoint of improving the speed of foaming. Yes, 1-5 mass% is preferable, and 2-4 mass% is more preferable.

  The skin cleansing composition of the present invention comprises, as component (D), (D1) a cationized polymer having a charge density of 0.5 to 4.5 meq / g, (D2) nonionic gums, and (D3) hydroxy By containing three types of nonionic cellulose polymers to which an ethyl group or a hydroxypropyl group is added, foam with a thick feeling can be obtained, and a foam with a thick feeling can be obtained.

The cationized polymer of the component (D1) has a charge density of 0.5 to 4.5 meq / g, and is preferably 4.1 to 4.3 meq / g from the viewpoint of improving the foaming feeling. Here, the charge density of the cationized polymer is the number of moles of cationic groups per gram of polymer × 1000 (meq / g).
The weight average molecular weight of the cationized polymer of the component (D1) is preferably 80,000 to 1,500,000, more preferably 90,000 to 1,000,000, from the viewpoint of improving the foamy feeling and the feeling of use of the cleaning composition. Preferably, 95,000 to 500,000 are more preferable, and 100,000 to 200,000 are even more preferable.

  Examples of the cationized polymer of component (D1) include cationized cellulose, cationized starch, cationized guar gum, cationized tara gum, cationized locust bean gum, cationized fenugreek gum, diallyldialkyl quaternary ammonium salt / acrylamide copolymer. Products, diallyldialkyl quaternary ammonium salts / acrylamide / acrylic acid copolymers, and the like. Of these, diallyldialkyl quaternary ammonium salt / acrylamide copolymer is preferable.

More specifically, as a diallyldialkyl quaternary ammonium salt (DMDAAC) / acrylamide (AM) copolymer, Marquat 550 (weight average molecular weight: 160,000, cationic charge density: 4.22 meq / g, DMDAAC: AM = 50 : 50), Marquat 2200 (weight average molecular weight: 90,000, cationic charge density: 4.22 meq / g, DMDAAC: AM = 50: 50), Marquat S (weight average molecular weight: 260,000, cationic charge density: 4.22 meq) / G, DMDAAC: AM = 50: 50) [Nole, NALCO, copolymer of acrylamide and diallyldimethylammonium salt], Poise C-60H (weight average molecular weight: 600,000, cationic charge density: 1.07 to 1) .78 meq / g), Katachiro M-80 (weight average molecular weight: 800,000, cationic charge density: 0.93 .21 meq / g), Poise C-150L (weight average molecular weight: 1,500,000, cationic charge density: 0.71-1.07 meq / g) [above, Kao Corporation, cationized cellulose (O- [2-hydroxy-chloride] 3- (trimethylammonio) propyl] hydroxyethylcellulose)], Jaguar C17 (weight average molecular weight: 300,000, cationic charge density: 1.07-1.50 meq / g), Jaguar C14 (weight average molecular weight: 300,000, cation Charge density: 0.93 to 1.21 meq / g) [above, Rhodia, cationized guar gum (guar hydroxypropyltriammonium chloride)] and the like.
The cationized charge density of cationized cellulose and guar hydroxypropyltriammonium chloride is based on the nitrogen content ratio (% by mass) in the polymer, assuming that the nitrogen contained in the polymer is 100% cationized. Asked.

  Component (D1) can be used singly or in combination of two or more. From the viewpoint of improving the consistency of foam and the feeling of stop feeling at the time of rinsing, the content is 0.1% in the total composition. -1.5 mass% is preferable, 0.3-1.0 mass% is more preferable, 0.5-0.8 mass% is still more preferable.

Examples of the nonionic gums of component (D2) include guar gum, xanthan gum, gellan gum, carrageenan, roast bean gum, tara gum, and derivatives thereof.
Of these, guar gum and xanthan gum are preferable from the viewpoint of improving the foam thickness and foam thickness.

  Component (D2) can be used alone or in combination of two or more, and the content is 0.05 to 0.5% by mass in the total composition from the viewpoint of improving the foam thickness and foam thickness. Is preferable, 0.1-0.3 mass% is more preferable, 0.1-0.2 mass% is still more preferable.

  The component (D3) cellulose used in the present invention has a hydroxyethyl group or a hydroxypropyl group added thereto. That is, a part of hydrogen atoms in the hydroxyl group of cellulose is substituted with a hydroxyethyl group or a hydroxypropyl group, and may have a substituent other than these.

Specific examples include hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, and the like.
These are obtained by reacting cellulose with caustic soda to make alkaline cellulose, and then reacting methyl chloride, monochloroacetic acid, ethylene oxide, propylene oxide, etc. to replace the hydrogen atom in the hydroxyl group of cellulose.

From the viewpoint of improving the sustainability of foam, the component (D3) cellulose preferably has an average degree of substitution of greater than 0, more preferably 0.5 or more, preferably 3 or less, and more preferably 2 or less. The average molecular weight is preferably 200,000 or more, more preferably 500,000 or more, more preferably 650,000 or more, from the viewpoint of improving the solubility in the cleaning composition and the persistence of the foam, 000,000 or less is preferable, 2,000,000 or less is more preferable, and 1,600,000 or less is more preferable.
In the present invention, the average degree of substitution is determined by NMR, and the average molecular weight is determined by using a gel permeation chromatography (GPC) -multi-angle laser light scattering detector (MALLS) system with polyethylene oxide as a standard substance. Measured.

  Component (D3) is preferably hydroxyethyl cellulose or hydroxypropyl methylcellulose, preferably having an average degree of substitution of 0.5 to 2 and an average molecular weight of 650,000 to 1,600,000.

  As the component (D3), for example, for hydroxyethyl cellulose, CELLOSIZE QP52000H (manufactured by Dow Chemical), HEC Daicel SE400, SE500, SE600, SE850, SE900 (above, Daicel Finechem), etc .; , METALOSE 60SH, 65SH, 90SH (above, manufactured by Shin-Etsu Chemical Co., Ltd.), BENECEL E50, E4M, E10M, F4MC, K99C, K4M, K15M, K35M, K100M, K200M (above, made by ASHLAND) etc. can do.

  Component (D3) can be used singly or in combination of two or more, and from the viewpoint of improving the durability and usability of the foam (ease of taking the liquid into the cleaning tool), its content is in the total composition 0.1 to 1% by mass is preferable, 0.2 to 0.8% by mass is more preferable, and 0.2 to 0.5% by mass is still more preferable.

  In the present invention, the total content of components (D2) and (D3) is 0.1% in the total composition from the viewpoint of improving the speed of foaming and foam persistence, and reducing the residual feeling during rinsing. -0.8 mass% is preferable, 0.2-0.6 mass% is more preferable, 0.3-0.4 mass% is still more preferable.

  In the present invention, the mass ratio (D2) / (D3) of the components (D2) and (D3) is preferably 0.1 to 3 from the viewpoint of improving the speed of foaming and the feeling of foam thickness. 2 to 2.5 is more preferable, and 0.3 to 0.5 is still more preferable.

  In the present invention, the mass ratio (D1) / ((D2) + (D3)) of the component (D1) with respect to the contents of the components (D2) and (D3) indicates the thickness of the foam and the smoothness during rinsing. From a viewpoint of improving, 0.2-2.5 are preferable, 0.25-2 are more preferable, and 1.5-2 are still more preferable.

  Further, in the present invention, the total content of the components (D1), (D2) and (D3) is all from the viewpoint of improving the foam thickness, smoothness at the time of rinsing and lack of residual feeling at the end of rinsing. 0.5-1.6 mass% is preferable in a composition, 0.7-1.4 mass% is more preferable, 1.0-1.2 mass% is still more preferable.

  In the present invention, water is used as a solvent, and the content thereof is preferably 45% by mass or more, more preferably 55% by mass or more, preferably 85% by mass or less, and more preferably 75% by mass or less in the total composition.

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

The foam produced by foaming the skin cleansing composition of the present invention is easy to move when expanded slowly on the skin, and when expanded quickly, the volume of the foam increases and the foam becomes difficult to move, Since the resistance of the foam is increased, even when the foam is quickly expanded, the foam can be felt on the skin (the presence of the foam is increased). With this feature, the whole body can be washed with a thicker and smoother foam, and a soft skin can be realized with a moist and smooth skin.
Furthermore, since the foam having a foam viscosity change of 0 mPa · s or more shown in Test Example 1 described later is more elastic and thick, it is smooth and smooth during the cleaning. The whole body can be washed with foam, and after washing, the skin is moist and smooth, and the soft skin can be strongly felt.
The change in foam viscosity is preferably 0 or more, more preferably 0 to 100 mPa · s, further preferably 5 to 80 mPa · s, and more preferably 10 to 70 mPa from the viewpoint of obtaining a more elastic and thick foam. · S is more preferable, 20 to 65 mPa · s is more preferable, and 30 to 60 mPa · s is particularly preferable.

  In addition, the skin cleansing composition of the present invention is a polyhydric alcohol such as dipropylene glycol, 1,3-butylene glycol, glycerin, propylene glycol, sorbitol, malbitol, diglycerin, raffinose, hexylene glycol and the like from the same viewpoint. Is preferable, and it is more preferable to contain at least one selected from glycerin and propylene glycol.

The skin cleansing composition of the present invention is produced by mixing the compounding ingredients by a usual method. The resulting cleaning composition may be either liquid or solid, but when it is liquid, it is a B-type viscometer (VISCOMETER TVB-10, manufactured by Toki Sangyo Co., Ltd., No. 3 rotor or No. (4 rotor, 30, 12 or 6 rpm, 60 seconds later, 30 ° C.), the viscosity is preferably 200 to 80000, and can be adjusted by appropriately selecting the blending components.
Moreover, it is preferable that pH is 3-12, pH 5-10.5 is more preferable, and pH 5-10 is still more preferable. In addition, the measurement of pH is a value obtained by diluting each cleaning composition 20 times with water at 25 ° C.

The skin cleansing composition of the present invention is suitable as, for example, a facial cleanser, a body soap, a hand soap, etc., and a body soap is more preferable.
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. In addition, an appropriate amount can be applied to cleaning aids such as towels, sponges, brushes, etc., and foamed for cleaning.
This invention discloses the following compositions further regarding embodiment mentioned above.

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

(In the formula, R ¹ represents an alkyl group having 4 to 22 carbon atoms, n represents a number of 0 to 20, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or organic ammonium).
Wherein R ^{1 has} an average carbon number of 10.8 to 12.8, contains 4.3 to 30% by mass of n = 0, and n = 1 An alkyl ether carboxylic acid or a salt thereof containing 1 to 8% by mass,
(B) General formula (2)

(Wherein R ² represents an alkyl group or alkenyl group having 9 to 21 carbon atoms, R ² includes at least an alkyl group having 11 carbon atoms, and R ^{2 has} an average carbon number of 11 to 16)
10 to 14% by mass of a fatty acid represented by
(C) Amphoteric surfactant 0.5-5% by mass,
(D1) a cationized polymer having a charge density of 0.5 to 4.5 meq / g,
(D2) nonionic gums,
(D3) Nonionic cellulose to which hydroxyethyl group or hydroxypropyl group is added, and the mass ratio of fatty acids having 12 alkyl groups to all fatty acids (fatty acids having 12 alkyl groups / total fatty acids) The skin cleansing composition which is 0.5-1.

<2> In the component (A), in the general formula (1), R ¹ is preferably an alkyl group having 6 to 20 carbon atoms, more preferably an alkyl group having 8 to 18 carbon atoms, and 8 to 8 carbon atoms. The <1> foot-and-skin skin cleansing composition is more preferably an alkyl group having 16 alkyl groups, and still more preferably an alkyl group having 10 to 16 carbon atoms.
<3> In the component (A), in the general formula (1), preferably, R ^{1 has} an average carbon number of 10.8 to 12.5, and more preferably 12.1 to 12.4. > Or <2>.
<4> In component (A), in general formula (1), preferably, R ¹ contains two or more alkyl groups, and the component having the largest alkyl chain length is 55% by mass or more and 97% by mass. The skin cleanser composition according to any one of <1> to <3>, more preferably less than%, more preferably from 60 to 95% by mass, and even more preferably from 70 to 95% by mass.
<5> In the component (A), in the general formula (1), preferably, the average value of n (average added mole number of ethylene oxide) is 1.5 to 10, and 2.5 to 6. 4 is more preferable, 2.5 to 3.7 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 still more preferable The skin cleansing composition according to any one of <1> to <4>.

In <6> component (A), the component of n = 0 in general formula (1) becomes like this. Preferably it is 4.9-27 mass%, More preferably, it is 9.6-27 mass%, More preferably, 9. More than 6 mass% and 27 mass% or less, preferably 9.8-27 mass%, more preferably 9.9-27 mass%, still more preferably 9.9-16 mass%, more preferably 9.9. The skin cleanser composition according to any one of <1> to <5>, which is contained in 15% by mass.
In <7> component (A), in general formula (1), the component of n = 1 and the component of n = 2 are total, Preferably they are 21 mass% or more and less than 40 mass%, More preferably, it is 27-37 mass%. The skin cleanser composition according to any one of <1> to <6>, further preferably 27 to 36.5% by mass, and even more preferably 35 to 36.1% by mass.
<8> In the component (A), in the general formula (1), preferably, the mass ratio of the components of n = 0, 1, 2, 3, 4 is the maximum alkyl chain length in the composition of R ¹ In the components, (n = 0 component mass): (n = 1 component mass): (n = 2 component mass): (n = 3 component mass): (n = 4 component mass) = 1 The skin cleansing agent according to any one of <1> to <7>, which is 0.99 to 3.50: 0.89 to 3.00: 0.76 to 3.00: 0.63 to 1.6. Composition.

The content of <9> component (A) is preferably 2% by mass or more, more preferably 3% by mass or more, more preferably 5% by mass or less, and more preferably 4% by mass or less as the acid in the total composition. The skin cleansing composition according to any one of the above <1> to <8>.
<10> fatty acid component (B), in the general formula (2), preferably, in R ² is an alkyl or alkenyl group of 11 to 17 carbon atoms, more preferably an alkyl group having 11 to 15 carbon atoms The skin cleansing composition according to any one of <1> to <9>.
In the general formula (2), the fatty acid of <11> component (B) is preferably an average carbon number of R ² of 11 to 13, more preferably 11.5 to 12.5, and more preferably 11.5 to 12. The skin cleanser composition according to any one of <1> to <10>, wherein 12 is even more preferable.
<12> The mass ratio of the fatty acid having an alkyl group having 11 carbon atoms to the total fatty acid (fatty acid having an alkyl group having 11 carbon atoms / total fatty acid) is preferably 0.55 or more and 0.80 or less. The skin cleanser composition according to any one of <1> to <11>, preferably 0.60 or less.

The content of <13> component (B) is preferably 10% by mass or more, more preferably 13.5% by mass or more, preferably 15% by mass or less, and preferably 14.5% by mass or less in the total composition. The skin cleansing composition according to any one of the above <1> to <12>, which is more preferable.
<14> The amphoteric surfactant of component (C) is preferably an amide betaine type surfactant or a sulfobetaine type surfactant, more preferably amide propyl betaine laurate or lauryl hydroxysulfo betaine <1 The skin cleanser composition according to any one of> to <13>.
The content of <15> component (C) is preferably 1% by mass or more in the total composition, more preferably 2% by mass or more, preferably 5% by mass or less, and more preferably 4% by mass or less. The skin cleansing composition according to any one of <1> to <14>.

<16> The skin cleanser composition according to any one of <1> to <15>, wherein the cationized polymer of component (D1) preferably has a charge density of 4.1 to 4.3 meq / g.
<17> The cationized polymer of component (D1) is preferably cationized cellulose, cationized starch, cationized guar gum, cationized cod gum, cationized locust bean gum, cationized fenugreek gum, diallyldialkyl quaternary ammonium salt / Any one of <1> to <16>, wherein the acrylamide copolymer is a diallyldialkyl quaternary ammonium salt / acrylamide / acrylic acid copolymer, and more preferably a diallyldialkyl quaternary ammonium salt / acrylamide copolymer. Skin cleansing composition.
The content of <18> component (D1) is preferably 0.1% by mass or more, more preferably 0.3% by mass or more, still more preferably 0.5% by mass or more, in the total composition. The skin cleanser composition according to any one of <1> to <17>, preferably 0.5% by mass or less, more preferably 1.0% by mass or less, and still more preferably 0.8% by mass or less.

<19> The nonionic gums of component (D2) are preferably guar gum, xanthan gum, gellan gum, carrageenan, roast bean gum, tara gum, derivatives thereof, and more preferably guar gum and xanthan gum. <18> The skin cleanser composition according to any one of the above.
The content of the <20> component (D2) is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, and preferably 0.5% by mass or less in the total composition. 3 mass% or less is more preferable, 0.2 mass% or less is still more preferable The skin cleaning composition in any one of said <1>-<19>.
<21> The skin cleanser composition according to any one of <1> to <20>, wherein the nonionic cellulose of component (D3) is preferably hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethylmethylcellulose, or hydroxypropylmethylcellulose. object.
The content of <22> component (D3) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more, and preferably 1% by mass or less, and 0.8% by mass in the total composition. % Or less is more preferable, and 0.5 mass% or less is still more preferable, The skin cleaning composition in any one of said <1>-<21>.

The total content of <23> components (D2) and (D3) is preferably 0.1% by mass or more in the total composition, more preferably 0.2% by mass or more, and 0.3% by mass or more. Is more preferable, 0.8 mass% or less is preferable, 0.6 mass% or less is more preferable, 0.4 mass% or less is still more preferable, The skin cleaning composition in any one of said <1>-<22> object.
<24> The mass ratio (D2) / (D3) of the components (D2) and (D3) is preferably 0.1 or more, more preferably 0.2 or more, still more preferably 0.3 or more, 3 or less is preferable, 2.5 or less is more preferable, and 0.5 or less is still more preferable, The skin cleaning composition in any one of said <1>-<23>.
<25> The mass ratio (D1) / ((D2) + (D3)) of the component (D1) to the contents of the components (D2) and (D3) is preferably 0.2 or more and 0 The skin cleanser composition according to any one of <1> to <24>, wherein 25 or more is more preferable, 1.5 or more is more preferable, 2.5 or less is preferable, and 2 or less is more preferable.

The total content of <26> components (D1), (D2), and (D3) is preferably 0.5% by mass or more, more preferably 0.7% by mass or more in the total composition. 0 mass% or more is still more preferable, 1.6 mass% or less is preferable, 1.4 mass% or less is more preferable, 1.2 mass% or less is still more preferable Any one of said <1>-<25>. Skin cleansing composition.
<27> The water content is preferably 45% by mass or more, more preferably 55% by mass or more, preferably 85% by mass or less, and more preferably 75% by mass or less in the total composition <1>. The skin cleansing composition according to any one of to <26>.
<28> Further, it preferably contains a polyhydric alcohol, more preferably dipropylene glycol, 1,3-butylene glycol, glycerin, propylene glycol, sorbitol, malbitol, diglycerin, raffinose, hexylene glycol, glycerin, propylene The skin cleanser composition according to any one of <1> to <27>, wherein glycol is more preferable.

<29> The change in foam viscosity is preferably 0 mPa · s or more, more preferably 0 to 100 mPa · s, further preferably 5 to 80 mPa · s, still more preferably 10 to 70 mPa · s, and more preferably 20 to 65 mPa · s. The skin cleanser composition according to any one of the above items <1> to <28>, more preferably 30 to 60 mPa · s.
<30> A method for rinsing the skin after applying the skin cleansing agent according to any one of <1> to <29> to the skin part and cleaning the skin part.
<31> Use of the composition according to any one of <1> to <29> as a skin cleanser.
<32> A skin cleaning method, wherein the skin cleaning composition according to any one of <1> to <29> is applied to a skin part.

<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)

<Production example>
The alkyl ether carboxylic acid of component (A) used in the frame skin cleanser 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 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 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 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.
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: 1.19: 1.13: 0.94: 1.

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 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, regarding EC2, the alkyl ether carboxylic acids obtained in Production Example 5, Production Example 6 and Production Example 7 were mixed at a mass ratio of 78.75 / 15 / 6.25, respectively. did.

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

  In the examples, 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.

The composition of the component (A) used in the examples is as shown in Tables 1 and 2.
Moreover, the average EO addition mole number of the commercially available alkyl ether carboxylic acid (AKYPO RLM45 (made by Kao company)) used in the Example referred to the catalog value of each company vendor, and the value currently published on the homepage. The unknown alkyl composition, the component amount of n = 0, and the total amount of the component of n = 1 and the component of n = 2 were analyzed by the above method.

Examples 1-16, Comparative Examples 1-8
Manufactures a skin cleanser composition having the composition shown in Table 3 and Table 4, the speed of foaming at the time of washing, the feeling of foaminess at the time of washing, the feeling of thickness of the foam at the time of washing, the smoothness at the time of rinsing, the end point of rinsing Stop feeling at the end of the rinse, no residual feeling at the end of rinsing and moist feeling after towel drying. The results are shown in Table 3 and Table 4 together.

(Production method)
The amount equivalent to 90% of the amount of ion-exchanged water and, if necessary, glycerin was heated to 70 ° C., and then component (D3) was slowly added with stirring to disperse it uniformly. Components (A) and (B) were added and stirred until reaching 70 ° C. Thereafter, a 48% aqueous potassium hydroxide solution was added in an amount to reach pH 9.5, and the mixture was stirred to be uniform. Further, the component (D2) dispersed in the remaining ion-exchanged water (25 ° C.) was added. Component (D1), component (C), and ethylene glycol distearate as necessary were added and stirred to make uniform. Subsequently, after cooling to room temperature while stirring, a fragrance and ethylenediamine tetraacetate were added as necessary and stirred until uniform to obtain a skin cleansing composition.

(Evaluation method)
After wetting the left and right forearms with 30 ° C. tap water, take 1 g of each skin cleanser composition and apply it directly to the opposite forearm (from the elbow to the wrist) and place the palm in the axial direction of the arm. It was reciprocated and bubbled. The speed of foaming at the time of washing was evaluated from the state of foam in the forearm at this time. In addition, from the feel of the forearm and palm from the 16th to the 20th time when reciprocating 20 times, the feeling of foam thickening and the thickness of the foam were evaluated.
Next, rinse with tap water at 30 ° C. Rinse the forearm with the palm of your hand, smoothness at the time of rinsing, no residual feeling at the end of rinsing, feeling that the palm stops at the end of rinsing (rinse The stop feeling at the end point was evaluated. Furthermore, after towel drying, it evaluated about the moist feeling of skin.
Each evaluation was performed according to the following criteria, and the result was shown as an average value of three panelists.

(1) Speed of foaming during cleaning:
5; I felt that foaming was fast.
4; I felt that foaming was a little quick.
3; Neither can be said.
2; I felt that foaming was a little slow.
1; I felt that foaming was slow.

(2) Thickness of foam during washing:
5; I felt a thick and smooth foam.
4; I felt it was a smooth bubble with a little bit.
3; Neither can be said.
2; I felt that the thickening of the bubbles was not a little.
1; I felt there was no thickening of bubbles.

(3) Bubble thickness at the time of washing:
5; I felt that there was foam thickness.
4; I felt that there was a little foam thickness.
3; Neither can be said.
2; I felt that the thickness of the foam was not a little.
1; I felt there was no foam thickness.

(4) Smoothness when rinsing:
5; I felt it was smooth.
4; I felt it was a little smooth.
3; Neither can be said.
2; I felt that it was not smooth.
1; I felt it was not smooth.

(5) Stop feeling at the end of rinsing:
5; I felt that the stop feeling at the end of rinsing was strong.
4; I felt that the stop feeling at the end of rinsing was somewhat strong.
3; I felt that the stop feeling at the end of rinsing was normal.
2; I felt that the stop feeling at the end of rinsing was somewhat weak.
1; I felt that the stop feeling at the end of rinsing was weak.

(6) No residual feeling at the end of rinsing:
5; At the end of rinsing, there was no residual feeling.
4; At the end of rinsing, I felt that there was no residual feeling.
3; Neither can be said.
2; I felt that there was some residual feeling at the end of rinsing.
1; I felt that there was a residual feeling at the end of rinsing.

(7) Moist skin feeling after towel drying:
5; Moist.
4; Slightly moist.
3; Neither can be said.
2; Does not moist a little.
1; not moist.

Test example 1
With respect to the skin cleanser compositions of Examples 2 and 6 and Comparative Examples 5, 7, and 8, changes in foam viscosity were examined.
That is, 6 mL of each skin cleansing composition was placed on a nylon towel (20 cm × 100 cm), 90 mL of 35 ° C. tap water was added, and the resulting mixture was rubbed 50 times to be foamed. Rheology measurement (step shear flow test) of the obtained foam was performed under the following conditions.
Rheometer: Physica MCR300
Measurement temperature: 30 ° C
Measurement condition cell: Parallel plate with a diameter of 50 mm, gap 0.5 mm (PP50 / Ti-SN1786; d = 0.5 mm)
Shear speed setting: 0.1, 0.3, 1, 3, 10, 30, 100, 300, 1000, 3000 s ^-1
From 0.1 s ^-1 to 3000 s ^-1 , the speed was increased stepwise while holding at each shear rate for 5 seconds.
Number of measurement points: Viscosity measurement (mPa · s) at 5 points per second and 25 points at each shear rate.
Measurement time: 50 seconds in total

The value of the foam viscosity after 5 seconds at a shear rate of 300 s ⁻¹ (mPa · s: 40 seconds after the start of measurement) and the value of the foam viscosity after 5 seconds at a shear rate of 1000 s ⁻¹ (mPa · s: start of measurement 45) Seconds later), and the change value of the foam viscosity was calculated by the following formula. The results are shown in Table 5.

  From the above test, the change value of the foam viscosity was positive in the skin cleanser composition of the example and negative in the skin cleanser composition of the comparative example. The example is a skin cleanser composition that can feel excellent foam thickness and thickness. In particular, Example 2, which has a large change in foam viscosity, is elastic and thick even in thick foam. I felt it was a bubble with a feeling.

Formulation Example 1
In the same manner as in the production method of Example 1, a skin cleanser composition having the following components (pH: 9.5, fatty acid average carbon number: 13.00, fatty acid C12 ratio: 0.57, fatty acid total amount: 14.00, content of component (D) (D1 + D2 + D3): 1.10, D1 / (D2 + D3): 1.75, D2 / D3: 0.33, D2 + D3: 0.40, C12 / other higher fatty acids: 1 .33) was obtained.
The obtained skin cleanser composition was excellent in foaming, foam thickness and thickness, had good rinsing properties, had no residual feeling after rinsing, and had a moist feeling. Furthermore, the whole body could be washed with smooth, smooth and smooth foam, and soft skin with a moist and smooth skin could be realized.

(component)
EC13 (mass%)
Lauric acid 3
Stearic acid 8
Isostearic acid 5
Polyoxyethylene (2) sodium lauryl ether sulfate * 2 0.15
Dimethyldiallylammonium chloride / acrylamide copolymer * 3
0.7
Hydroxypropyl guar gum * 6 0.1
Hydroxypropyl methylcellulose * 8 0.3
Lauric acid amidopropyl betaine 3
Ethylene glycol distearate 2
EDTA-2Na proper amount perfume appropriate amount 48% potassium hydroxide appropriate amount
Ion exchange water balance
Total 100

Formulation example 2
In the same manner as in the production method of Example 1, a skin cleanser composition having the following components (pH: 9.5, fatty acid average carbon number: 13.00, fatty acid C12 ratio: 0.57, fatty acid total amount: 14.00, content of component (D) (D1 + D2 + D3): 1.10, D1 / (D2 + D3): 1.75, D2 / D3: 0.33, D2 + D3: 0.40, C12 / other higher fatty acids: 1 .33) was obtained.
The obtained skin cleanser composition was excellent in foaming, foam thickness and thickness, had good rinsing properties, had no residual feeling after rinsing, and had a moist feeling. Furthermore, the whole body could be washed with smooth, smooth and smooth foam, and soft skin with a moist and smooth skin could be realized.

(component)
EC63 (mass%)
Lauric acid 3
Stearic acid 8
Isostearic acid 5
Polyoxyethylene (2) sodium lauryl ether sulfate * 2 0.15
Dimethyldiallylammonium chloride / acrylamide copolymer * 3
0.7
Hydroxypropyl guar gum * 6 0.1
Hydroxypropyl methylcellulose * 8 0.3
Lauric acid amidopropyl betaine 3
Ethylene glycol distearate 2
EDTA-2Na proper amount perfume appropriate amount 48% potassium hydroxide appropriate amount
Ion exchange water balance
Total 100

Claims (6)

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

(In the formula, R ¹ represents an alkyl group having 4 to 22 carbon atoms, n represents a number of 0 to 20, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, or organic ammonium).
Wherein R ^{1 has} an average carbon number of 10.8 to 12.8, contains 4.3 to 30% by mass of n = 0, and n = 1 An alkyl ether carboxylic acid or a salt thereof containing 1 to 8% by mass,
(B) General formula (2)

(Wherein R ² represents an alkyl group or alkenyl group having 9 to 21 carbon atoms, R ² includes at least an alkyl group having 11 carbon atoms, and R ^{2 has} an average carbon number of 11 to 15)
8 to 16% by mass of a fatty acid represented by
(C) Amphoteric surfactant 0.5-7% by mass,
(D1) a cationized polymer having a charge density of 0.5 to 4.5 meq / g,
(D2) nonionic gums,
(D3) Nonionic cellulose to which hydroxyethyl group or hydroxypropyl group is added, and the mass ratio of fatty acids having 11 alkyl groups to all fatty acids (fatty acids having 11 alkyl groups / total fatty acids) is The skin cleansing composition which is 0.5-1.   Component (D1) is cationized cellulose, cationized starch, cationized guar gum, cationized tara gum, cationized locust bean gum, cationized fenugreek gum, diallyldialkyl quaternary ammonium salt / acrylamide copolymer, diallyldialkyl quaternary ammonium The skin cleansing composition according to claim 1, which is at least one selected from a salt / acrylamide / acrylic acid copolymer.   In the alkyl ether carboxylic acid represented by the general formula (1) or a salt thereof, the component of n = 0 exceeds 9.6% by mass and is 27% by mass or less, and the component of n = 1 and the component of n = 2 in total. The skin cleansing composition according to claim 1 or 2, comprising 21% by mass or more and less than 40% by mass.   The skin cleansing composition according to any one of claims 1 to 3, wherein the total content of the components (D2) and (D3) is 0.1 to 0.8 mass%.   The skin cleansing composition according to any one of claims 1 to 4, wherein a mass ratio (D2) / (D3) of the components (D2) and (D3) is 0.1 to 3.   The mass ratio (D1) / ((D2) + (D3)) of the component (D1) with respect to the contents of the components (D2) and (D3) is 0.2 to 2.5. The skin cleanser composition of any one of Claims.