JPH06264091A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain a detergent compsn. having a mild action on skin and hair, an excellent foaming power, creamy foam properties, and an excellent conditioning effect on hair by using a specified salt of an N-acrylaspartic acid and a specific amphoteric beta-alanine surfactant. CONSTITUTION:This detergent compsn. comprises a salt of an N-acylaspartic acid of formula I (wherein R1 is 7-12C alkyl or alkenyl; and M1 and M2 are each H, an alkali metal, ammonium, or an org. amine, provided than M1 and M2 are not simultaneously H), and an amphoteric beta-alanine surfactant of formula II (wherein R2 is a 6-18C hydrocarbon group; (m) is 0 to 9; (n) is 1 to 10; m+n is 1 to 10; and M3 is M1).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition having a mild action on skin and hair, an excellent foaming power and a creamy foam quality, and further showing an excellent conditioning effect on hair.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
Anionic surfactants such as alkyl sulfate ester salts, polyoxyethylene alkyl ether sulfate salts, and α-olefin sulfonates are widely used as detergent surfactants. However, all of these anionic surfactants have the disadvantage that they are inferior in skin irritation to some extent.

By the way, the amino acid type surfactant N-acylaspartate is known as a mild detergent for the skin. However, this activator is not sufficient in foaming and detergency, and is used in combination with other activators, for example, in combination with betaine (JP-A-2-51597), tertiary alkylamine oxides and alkyl ether sulfates. Combined use (JP-A-2-92998) and the like have been proposed. However, foaming, creamy foam quality, and conditioning effect on hair after washing are still insufficient.

On the other hand, the β-alanine type amphoteric surfactant is useful as one component of a detergent, has good detergency and excellent dispersibility of metal soap (scum), and is mild to skin and hair. It is known that (Japanese Patent Publication Sho 53-420)
41, Japanese Patent Publication No. 57-39280). However, it is difficult to use it as a main surfactant of a cleaning agent because it lacks a foaming power and lacks a rich feeling of foam quality.

In view of the above circumstances, the present inventor has conducted extensive studies, and as a result, a composition containing an N-acyl aspartate and a β-alanine-type amphoteric surfactant has excellent foaming power and creaminess. The present invention was found to be a detergent composition having a foam quality, less skin irritation, and an excellent conditioning effect on hair, and the present invention has been completed.

That is, an object of the present invention is to provide a detergent composition having a mild action on the skin and hair, an excellent foaming power and a creamy foam quality, and further showing an excellent conditioning effect on the hair. It is in.

[0007]

Means for Solving the Problems The present invention which achieves the above-mentioned object includes (a) a general formula (A)

[Chemical 3] (In the formula, R ₁ represents an alkyl group or an alkenyl group having 7 to 21 carbon atoms, and M ₁ and M ₂ represent hydrogen, an alkali metal, ammonium or an organic amine, provided that M ₁ and M ₂
Are not hydrogen at the same time. ) And an N-acyl aspartate represented by the formula (b) and the general formula (B)

[Chemical 4] (In the formula, R ₂ is a hydrocarbon group having 6 to 18 carbon atoms, m and n are integers, m = 0 to 9, n = 1 to 10, m + n = 1 to 10,
M ₃ represents hydrogen, alkali metal, ammonium or organic amine. And a β-alanine type amphoteric surfactant represented by the formula (4).

The N-acyl aspartate represented by the general formula (A) used in the present invention is L-form or D-form.
-Body or a mixture of both may be used, suitable examples being N-lauroyl aspartic acid,
N-myristoyl aspartic acid, N-palmitoyl aspartic acid, N-stearoyl aspartic acid, N-
Examples thereof include sodium salt, potassium salt, ammonium salt and triethanolamine salt of oleoyl aspartic acid and N-cocoyl aspartic acid. Also, N
Instead of using the acyl aspartate, N-acylaspartic acid may be used together with caustic soda, triethanolamine, etc. to form a salt in the detergent composition.

In the β-alanine type amphoteric surfactant represented by the above general formula (B) used in the present invention, R ₂
Is a hydrocarbon group having 6 to 18 carbon atoms, and examples thereof include single alkyl such as octyl, decyl, lauryl, myristyl, palmityl, stearyl and isostearyl, or a mixture thereof. Specifically, N- (2
-Hydroxydodecyl) -N- (2-hydroxyethyl) -β-alanine sodium salt, N- (2-hydroxydodecyl) -N- (polyoxyethylene (3E.
O. ))-Β-Alanine sodium salt, N- (2-hydroxyalkyl) -N- (2-hydroxyethyl) -β
-Alanine triethanolamine salt (2-hydroxyalkyl group is C ₁₂ , C ₁₄ ) and the like.

The total amount of the components of the general formulas (A) and (B) is
It is about 1 to 30% by weight, more preferably 3 to 20% by weight, based on the total amount of the detergent composition. If it is less than 1% by weight, the effect is not exhibited, and if it exceeds 30% by weight, it becomes difficult to obtain a uniform and stable composition. The weight ratio of the compound of general formula (A) to the compound of general formula (B) is about 10 /
It is preferable to use it in the range of 1 to 1/10, and the effect is not sufficiently exhibited at a weight ratio other than this range.

In addition to the above-mentioned essential components, the detergent composition of the present invention may contain components and additives that are commonly used in detergents. For example, higher fatty acids, higher alcohols, silicones, silicone derivatives, oily components such as lanolin derivatives and fatty acid esters of polyethylene glycol, nonionic surfactants such as fatty acid alkanol amides, polyoxyethylene alkyl ethers and alkyl amine oxides, alkylaminoacetic acid. Zwitterionic surfactants such as betaine and acylamidopropyl betaine,
Cationic surface active agents such as stearyl trimethyl ammonium chloride, cationic polymers [Polymer JR
(Manufactured by Union Carbide Corporation), polycoat NH (manufactured by Henkel), mercoat 550 (manufactured by Merck), gaff cut 755N (manufactured by GAF), cationized guar gum, methacrylic amphoteric / cationic polymer, etc.], bactericide, chelating agent , UV absorbers, pH adjusters, dyes and fragrances. The cleaning composition of the present invention is applied to shampoos, body cleaning agents, facial cleansers, kitchen detergents and the like.

[0012]

The present invention will be described in more detail with reference to examples. The effect was measured by the following evaluation method.

Foaming Foaming power was measured according to the loss miles test method. However,
The sample is a 2% aqueous solution (using CaCO ₃ 50 ppm artificial hard water) at a temperature of 40 ° C. ∘: Very good foaming, foaming power of 250 mm or more ◯: Good foaming, foaming power of 210 mm or more, 250 mm
Less than △: Foaming is normal, foaming power is 170 mm or more, 210 mm
Less than ×: Poor foaming, foaming power less than 170 mm

Fineness of Bubbles (Creamyness) A virusman foam measuring device was used to rotate the brush for 1000 rotations for 5 minutes, and then the bubbles were collected, and the viscosity thereof was measured with a B-type viscometer. The sample is a 2% aqueous solution. The finer the foam, the higher the foam viscosity. ◎ ... Good foam fineness, foam viscosity 1500 cps or more ○ ... Foam fineness is normal, foam viscosity 700-1500 c
ps x ... Poor foam fineness, foam viscosity 700 cps or less

Skin irritation (protein denaturation rate) test method The ovalbumin denaturation rate when the sample was added to an ovalbumin pH7 buffer solution at a sample concentration of 1% using aqueous high performance liquid chromatography was 220 nm. It measured using the absorption peak of. Denaturation rate (%) = (Ho-Hs) / Ho × 100 Ho: height of 220 nm absorption peak of ovalbumin Hs: 2 when sample is added to ovalbumin buffer solution
The height evaluation standard for the 20 nm absorption peak was set as follows. ◎ ... Ovalbumin denaturation rate of less than 30% ◯ ... Ovalbumin denaturation rate of 30% or more and less than 60% △ ... Ovalbumin denaturation rate of 60% or more and less than 80% × ... Ovalbumin denaturation rate of 80% or more

Ease of tying hair after washing (conditioning effect) This is an evaluation method by a sensory test. 5.0 g of the sample shampoo composition was applied to hair, shampooed, rinsed, and towel-dried. (The number of panelists is 20 women, and the evaluation score is the average score.) Evaluation 1; When hair is very difficult to put together 2; When hair is not easily put together 3; Hair is easy to put together 4; When hair is easy to put together 5; When hair is very easy to put together

Examples 1 to 5 and Comparative Examples 1 to 5 Shampoos having the blending compositions shown in Tables 1 and 2 were prepared by a usual method, and the effects of each essential component were investigated. The results are shown in Tables 1 and 2. .

[0018]

[Table 1]

[0019]

[Table 2]

As is clear from Examples 1 to 5, the cleaning agents using the components of the present invention all showed excellent performance. On the other hand, in Comparative Examples 1 and 2 lacking either of the essential components, sufficient performance cannot be obtained. Also, with one of the essential ingredients,
Usually, the combination with a surfactant used as a detergent (Comparative Examples 3 to 5) is inferior in terms of fineness of foam, skin irritation, and easiness of gathering hair after washing.

Example 6 A shampoo composition shown below was prepared and evaluated by the method described above. All items were evaluated as excellent as in Examples 1 to 5. (Wt%) N-cocoyl aspartic acid triethanolamine 10 [General formula B] R ₂ : C ₁₀ , m = 0, n = 1, M is triethanolamine Component (5) 6 Coconut oil fatty acid diethanolamide 3 Stearyl trimethyl ammonium chloride 1 Cationized cellulose (Polymer JR400, manufactured by UCC) 0.4 Perfume, preservative A suitable amount Purified water Residual

Example 7 The body shampoo shown below foamed and had excellent creaminess of the foam and had extremely low irritation to the skin. (Wt%) N-myristoyl aspartic acid triethanolamine 15 In the general formula B, R: C ₁₂ , m = 1, n = 2, and M is sodium. Component (6) 8 Lauroyl sarcosine triethanolamine 2 Concentrated glycerin 2 Fragrance, antiseptic, proper amount Purified water Residual

[0023]

Industrial Applicability As described above, the present invention is a detergent having a mild action on the skin and hair, an excellent foaming power and a creamy foam quality, and further showing an excellent conditioning effect on the hair. It is clear to provide a composition.

Claims (1)

[Claims] 1. (a) General formula (A): (In the formula, R ₁ represents an alkyl group or an alkenyl group having 7 to 21 carbon atoms, and M ₁ and M ₂ represent hydrogen, an alkali metal, ammonium or an organic amine, provided that M ₁ and M ₂
Are not hydrogen at the same time. N-acyl aspartate represented by the formula (b), and (b) the general formula (B): (In the formula, R ₂ is a hydrocarbon group having 6 to 18 carbon atoms, m and n are integers, m = 0 to 9, n = 1 to 10, m + n = 1 to 10,
M ₃ represents hydrogen, alkali metal, ammonium or organic amine. ) A cleaning composition comprising a β-alanine type amphoteric surfactant represented by