JPS62226921A - Skin detergent composition - Google Patents

Abstract

PURPOSE:The titled composition readily usable even under low temperature and high temperature, having improved shelf stability, washing properties, foaming properties, etc., obtained by blending an N-acylglutamate-containing composition with a specific component such as N-acyl-N-methyltaurine salt, etc. CONSTITUTION:(A) 10-40wt% N-acylglutamate, preferably a compound shown by formula I (R1 is 7-21C alkyl or 7-21C alkenyl; M1 and M2 are H, alkali metal, etc.), (B) 0.2-20wt% N-acyl-N-methyltaurine salt, preferably a compound shown by formula II (R2 is 7-17C alkyl or 7-17C alkenyl; M2 is Na or K), (C) 0.5-20wt% N-acyl-N-methyl-beta-alanine salt, preferably a compound shown by formula III (R3 is R2; M4 is M3), (D) 20-50wt% polyhydric alcohol (e.g. glycerin or sorbitol) and (E) 10-50wt% water.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention is easy to use even at low and high temperatures, has excellent storage stability, cleansing properties, foaming properties, and texture during use, and is comfortable to the skin. This invention relates to a creamy skin cleansing agent that is less irritating to the skin.

[Prior art]

N-acylglutamate, which is an acidic amino acid-based surfactant, is less irritating to the skin and has good cleansing and foaming properties. It is used as a base.

However, when N-acylglutamate coexists with large amounts of oily substances, its detergency and foaming properties decrease, and cream-like detergents based on N-acylglutamate become hard in winter, making it difficult to remove them from the container. However, there was a problem in that it became soft during the summer and would flow out of the container.

[Problem that the invention seeks to solve]

The object of the present invention is to have appropriate hardness at both low and high temperatures, and therefore be easy to use.

Good cleaning and foaming properties in the presence of oily substances,
To provide a skin cleansing composition that feels good when used and causes less irritation to the skin.

[Means for solving problems]

As a result of intensive research aimed at improving the above-mentioned drawbacks of cream skin cleansers containing N-acylglutamate, the present inventors have found that the above-mentioned drawbacks can be improved by adjusting the main ingredients to a predetermined composition. I found it.

Namely, 1 the creamy skin cleansing agent of the present invention contains N-acylglutamate, N-acyl-N-methyltaurate, N-acylglutamate, N-acyl-N-methyltaurate,
-Acyl-N-methyl-β-alanine salt, polyhydric alcohol and water.

As the N-acylglutamate used in the present invention, those represented by the following general formula (1) are preferred.

R, CONHCH-COOMl ・・
-(1) CH2CH2C00M2 (In the formula, R1 is an alkyl group or alkenyl group having 7 to 21 carbon atoms. Both M1 and M2 are hydrogen.

It is a cation derived from an alkali metal or an alkanolamine. ) A specific example of the compound represented by the general formula (1) is monosodium N-lauroylglutamate.

Monosodium N-myristoylglutamate.

N-i4 monosodium lumitoylglutamate.

Examples include monosodium N-stearoylglutamate, monopotassium N-stearoylglutamate, monosodium N-oleoylglutamate, monosodium N-cocoylglutamate, and monotriethanolamine N-cocoylglutamate. These may be used alone or in combination of two or more.

The N-acyl-N-methyltaurine salt used in the present invention is preferably one represented by the following general formula (2).

R2C0NCH2CH2SO3M3...
(2) CH.

(In the formula, 5R2 is an alkyl group having 7 to 17 carbon atoms or an alkenyl group 1M3 is sodium or potassium.) Specific examples of the compound represented by the general formula (2) include N-lauroyl-N-methyltaurine, N-lauroyl-N-methyltaurine, -Myristoil-N
- List sodium salts, potassium salts, etc. of methyltaurine, N-valmitoyl-N-methyltaurine, N-stearoyl-N-methyltaurine, N-oleoyl-N-methyltaurine, N-cocoyl-N-methyltaurine, etc. I can do it. These may be used alone or in combination of two or more.

N-acyl-N-methyl-β used in the present invention
- As the alanine salt, those represented by the following general formula (3) are preferable.

R3C0NCH2CH2C00M4...(
3) H3 (In the formula, R3 is an alkyl group having 7 to 17 carbon atoms or an alkenyl group 1M4 is sodium or potassium.) As a specific example of the compound represented by general formula (3).

N-lauroyl-N-methyl-β-alanine.

N-myristoyl-N-methyl-β-alanine, N-valmitoyl-N-methyl-β-alanine.

N-stearoyl-N-methyl-β-alanine, N-oVy? '(Rue N-methyl-β-alanine.

Examples include N-cocoyl-N-methyl-β-alanine nonodium salt and potassium salt. These may be used alone, or two or more types may be used in combination.

Examples of polyhydric alcohols used in the present invention include glycerin, polyglycerin, ethylene glycol, 1.
Examples include 3-butylene glycol, propylene glycol, sorbitol, maltitol, and polyethylene glycol, which may be used alone or in combination of two or more.

The amount of N-acylglutamate to be blended is preferably in the range of 10 to 40% by weight, particularly preferably in the range of 15 to 30% by weight, based on the one-component anastomoses.

If it is less than 10% by weight, the foaming power will decrease and the viscosity will be low, while if it exceeds 40% by weight, the composition will become hard at low temperatures, which is not preferable.

The amount of N-acyl-N-methyltaurine salt blended is preferably in the range of 0.2 to 20% by weight based on the entire composition, and 1
A range of 10% by weight is preferred. If it is less than 0.5% by weight, the composition will not be soft at high temperatures, and if it exceeds 20% by weight, it will become hard at low temperatures, which is not preferred.

N-acyl-N-methyl-β-alanine salt) blending amount is:
The range is preferably from 0.5 to 20% by weight, and particularly preferably from 1 to 10% by weight, based on the total composition. If it is less than 0.5% by weight, the composition will not be hard at low temperatures and the foaming power will also be reduced, and if it exceeds 20% by weight, the composition will become soft and easily separate at high temperatures, which is not preferred.

The blending amount of polyhydric alcohol is 20 to 20% of the total composition.
A range of 50% by weight is preferred, and a range of 25 to 40% by weight is particularly preferred. If it is less than 20% by weight, it will be difficult to dissolve the N-acylglutamate and the composition will be too hard, making it difficult to formulate a formulation. On the other hand, if it exceeds 50% by weight, the foaming power decreases and separation occurs during composition production, which is not preferable.

The amount of water blended is preferably in the range of 10 to 50% by weight, particularly preferably in the range of 20 to 40% by weight, based on the entire composition.

Other components may be added to the skin cleansing composition of the present invention as required. Such components include fatty acids, higher alcohols, hydrocarbons, oils and fats, lanolin, cholesterol, superfat agents such as esters; glycyrrhizin; allantoin; vitamins: trichlorocarpanilide; 2.4.4'-) +J chloro- 2'-Hydroxydiphenyl ether; Medicines such as aloe powder and crude drugs; Polyethylene particles, scrubs made from crushed plant seeds or shells, etc.; Pyrrolidone carboxylate; Pigments; Fragrances; Conditioners, water-soluble polymers, etc. It will be done.

〔Effect of the invention〕

According to the skin cleansing composition of the present invention, it has appropriate hardness at both low and high temperatures.

Therefore, it is easy to use, has good cleaning properties and foaming properties in the coexistence of oily substances, has a good feel when used, and exhibits excellent results in that it is less irritating to the skin.

〔Example〕

EXAMPLES Hereinafter, Examples and Comparative Examples of the present invention will be shown to specifically explain the effects of the present invention. Before explaining each side, we will explain the test methods adopted by each side.

Appearance After producing the composition, it was allowed to stand for one day at a temperature of 20 to 25°C, and then its appearance, such as color, uniformity, and condition, was observed with the naked eye.

A storage-stable composition packed in a polyethylene chip was left in a constant temperature bath maintained at 35°C for 6 months, and its condition was observed. "unstable"
, those that maintained a uniform state were evaluated as "stable".

Ease of removal from tube The composition packed in a polyethylene tube was left in a constant temperature bath maintained at 5°C for 5 days, and evaluated by 20 female panelists according to the following criteria, and the total evaluation score was calculated based on the number of people. The average value was taken as the evaluation value.

4 points: Can be easily pushed out by applying a light force. 3 points: Can be pushed out relatively easily by applying some force. 2 points: Can be pushed out by relatively strong pressure. 1 point: Can be pushed out with a relatively strong force. A polyethylene cheese filled with the molding composition was left in a constant temperature bath maintained at 35° C. for 5 days.

Evaluations were made by 20 female 4ners according to the following criteria, and the evaluation value was the average of the total evaluation scores.

4 points: The shape of the mouth of the tube remains in the cross section of the extruded composition. 3 points: The cross section of the extruded composition is somewhat oval. 2 points: The cross section of the extruded composition is slightly horizontal. 1 item with a wide oval shape: Foaming that causes the composition to flow and spread when extruded, and the feel when washing the face A face washing test was conducted by 20 female 9-year-olds and evaluated according to the following criteria. The evaluation value was the average of the total number of participants.

5 points, 2 good points, 4 points: Somewhat good, 3 points: Neither good nor bad, 2 points: Not good, 1 point: Bad Example 1 After putting the following ingredients (1) to (4) into a beaker and mixing and dissolving them. , to make a mixture (4) at 70°C.

(1) Polyethylene glycol 1500 10
Weight% (2) Propylene glycol 25
(3) Pyrrolidone carboxylic acid) IJ'
7mu 4 〃50% aqueous solution (4) Water
17 tt total 56 Next, the following components (5) to (7) were added to the above mixture (N and stirred and dissolved to prepare a mixture ω at 70°C).

(5) N-myristoylglutamic acid 20% by weight
Monosodium (6) N-cocoyl-N-methyltaurine 8
〃Sodium 30% aqueous solution (7) N-cocoyl-N-methyl-β-ara 10
〃Nin sodium 25% aqueous solution 8 N Separately, put the following ingredients (8) to α into a beaker.

A mixture (C) was prepared by heating and dissolving at 70°C.

(8) Myristic acid 2% by weight (9
) Monopyroglutamic acid monoisostearyl 2
〃P, O, E (40 mol) hardening and mustard oil (to) Sorbitan monolaurate 1 〃α■ Ethylene glycol distearate 1 〃6
〃 Add mixture (C) to the above mixture (B) and heat at 70°C for 1
After stirring for 0 minutes to make the mixture uniform, the mixture was stirred and cooled to room temperature under reduced pressure to obtain a homogeneous and stable cream composition.

Example 2 In Example 1, the following components (1) to (4) were used as the components of the mixture (G), the following components (5) to (7) were used as the components added to the mixture, and the mixture (C) was A homogeneous and stable cream-like composition was obtained in the same manner as in Example 1, except that the following components (9) to α) were used as components of (a).

(1) Polyethylene glycol 400
20% by weight (2) Sorbitol 1
5 (3) Sodium pyrrolidone carboxylate
5 50% aqueous solution (4) Water 20 (5) Monosodium N-lauroylglutamate 22 (6) Sodium N-lauroyl-N-methyltaurate 5 (7) N-
Lauroyl-N-methyl-β-alanine 8 30% sodium aqueous solution (8) Monopyroglutamic acid monoisostearic acid 3 P, O, E, (25 mol) glycerin (9) Glyceryl monostearate
1 αO diethylene glycol distearate
1 Comparative Example I An N-myristoylglutamic acid monosodium composition was obtained.

■ Comparative Example 2 2-lauryl-N-trichloride instead of 30% aqueous solution of sodium N-cocoyl-N-methyltaurate? xymethyl-N
-Hydroxyethylimidazolinium betaine 30q6
A cream composition was obtained in the same manner as in Example 1, except that .

■ Comparative Example 3 N -=t: Iyl-N-meF-ru β-alanine sodium 25% aqueous solution was replaced with 2-lauryl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine 25% aqueous solution. Example 1 except that
A cream composition was obtained in the same manner as above.

Comparative Example 4 A cream composition was obtained in the same manner as in Example 1, except that 35% ethanol was used instead of 10% polyethylene glycol 1500 and 25% propylene glycol.

The results of evaluating each performance of the creamy compositions of Example 1.2 and Comparative Examples 1 to 4 are shown in Table 1 below.

Table 1 As is clear from Table 1, the cream compositions of Examples 1 and 2 had good appearance and storage stability.

It is easy to take out from the tube and has good shape retention.

It lathers well and feels great when washing your face. On the other hand, none of the compositions of Comparative Examples 1 to 4 using components outside the scope of the present invention exhibited good performance.

Comparative Examples 5 to 7 ■ Comparative Example 5 Sodium N-cocoyl-N-methyltaurate and N
A cream composition was obtained in the same manner as in Example 1, except that monosodium N-myristoylglutamate was used instead of sodium cocoyl-N-methyl-β-alanine.

■ Comparative Example 6 A cream composition was obtained in the same manner as in Example 1, except that sodium N-cocoyl-N-methyl-β-alanine was used instead of sodium N-cocoyl-N-methyltaurate. Ta.

■ Comparative Example 7 N-:lI:r A cream was prepared in the same manner as in Example 1, except that sodium N-cocoyl-N-methyltaurate was used instead of sodium yl-N-methyl-β-alanine. A composition was obtained.

The evaluation results of the compositions of Comparative Examples 5 to 7 are shown in Table 2 below.

Table 2 As is clear from Table 2, N is an essential component of the present invention.
-Acyl-N-methyltaurine salt and N-acyl-N
The compositions of Comparative Examples 5 to 7 that do not contain either or both of the -methyl-β-alanine salts have poor performance.

Example 3 7 was prepared in the same manner as in Example 1, except that the content of monosodium N-myristoylglutamate was changed and the amount of water was adjusted so that the total amount was 100% by weight.
Prepare seed composition.

When their performance was evaluated, the results shown in Table 3 below were obtained.

As is clear from Table 3, particularly favorable results are obtained when the content of monosodium N-myristoylglutamate is 15 to 30% by weight.

Example 4 Except for changing the content of sodium N-cocoyl-N-methyltaurate and adjusting the amount of water blended so that the total amount was 100% by weight.

−21= Eight types of compositions were prepared in the same manner as in Example 1.

When their performance was evaluated, the results shown in Table 4 below were obtained.

Table 4 As is clear from Table 4, particularly favorable results are obtained when the content of sodium N-cocoyl-N-methyltaurate is 1 to 10% by weight.

Example 5 The same procedure as in Example 1 except that the content of sodium N-cocoyl-N-methyl-β-alanine was changed and the amount of water was adjusted so that the total amount was 100% by weight. When eight types of compositions were prepared and their performances were evaluated, the results shown in Table 5 below were obtained.

Table 5 As is clear from Table 5, particularly favorable results are obtained when the content of sodium N-cocoyl-N-methyl-β-alanine is 1 to 10% by weight.

Example 6 The content of propylene glycol was changed, and the total amount was 10
Eight types of compositions were prepared in the same manner as in Example 1, except that the amount of water was adjusted to 0% by weight, and their performance was evaluated. The results are shown in Table 6 below. Got the results.

Table 6 As is clear from Table 6, particularly favorable results are obtained when the polyhydric alcohol content is 25 to 40% by weight.

Claims (6)

[Claims] (1) A skin cleansing composition containing N-acylglutamate, N-acyl-N-methyltaurine salt, N-acyl-N-methyl-β-alanine salt, polyhydric alcohol, and water. . (2) The N-acylglutamate has the following general formula (1
2. The skin cleansing composition according to claim 1, which comprises one or more compounds represented by the following formulas. ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(1) (In the formula, R_1 is an alkyl group or alkenyl group having 7 to 21 carbon atoms, and M_1 and M_2 are both derived from hydrogen, an alkali metal, or an alkanolamine. ) (3) The skin cleansing composition according to claim 1, wherein the N-acyl-N-methyltaurine salt comprises one or more compounds represented by the following general formula (2). ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(2) (In the formula, R_2 is an alkyl group or alkenyl group having 7 to 17 carbon atoms, and M_3 is sodium or potassium.) (4) The N-acyl-N-methyl-β alanine salt is
The skin cleansing composition according to claim 1, which comprises one or more compounds represented by the following general formula (3). ▲There are mathematical formulas, chemical formulas, tables, etc.▼...(3) (In the formula, R_3 is an alkyl group or alkenyl group having 7 to 17 carbon atoms, and M_4 is sodium or potassium.) (5) Claim 1, wherein the polyhydric alcohol is one or more of glycerin, polyglycerin, ethylene glycol, 1,3-butylene glycol, propylene glycol, sorbitol, maltitol, and polyethylene glycol. The skin cleansing composition described. (6) 10 to 40% by weight of the N-acyl glutamate and 0.5 to 40% by weight of the N-acyl-N-methyltaurine salt.
20% by weight, 0.5 to 20% by weight of the N-acyl-N-methyl-β-alanine salt, and 20% by weight of the polyhydric alcohol.
The skin cleansing composition according to claim 1, containing 10 to 50% by weight of the water.