JPH05156282A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition comprising a specific acylamino acid and an ampholytic surfactant, having low irritation to skin and hair, excellent slipperiness, foaming properties, foam removal and feeling in use, suitable for cleaning skin, etc. CONSTITUTION:The objective composition comprising (A) a salt of a secondary amide type N-acylamino acid of the formula (R<1>CO is 10-16C straight-chain acyl; n is 1 or 2; M<1> is sodium, potassium or alkanolammonium when n is 1 and M<1> is potassium or alkanolammonium when n is 2), (B) an ampholytic surfactant such as carbobetaine-based surfactant and preferably (C) a salt of a higher fatty acid (e.g. sodium laurate). The blending ratio of the components A to the component C is preferably A/B=50/1 to 5/1 and C/(A+B)=1/10 to 1/3 by weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition, and more particularly to a detergent composition having a low irritation to skin and hair, an excellent foaming property and a good feeling after washing. Regarding

[0002]

2. Description of the Related Art Body cleansing compositions generally contain an anionic surfactant as a main component. Soaps, that is, higher fatty acid salts, are used for cleaning the skin, and alkyl sulfates and alkyl sulfones are used for cleaning the hair. The acid salt is mainly used. Soap used for skin cleansing has a drawback that it causes squeak and tightness at the time of rinsing, and alkylsulfates and alkylsulfonates used for hair washing are
It has excellent detergency, but has a problem in terms of irritation. Therefore, it has been investigated to use a specific N-acylated amino acid type surfactant as a main base of a detergent as a surfactant having excellent feeling of use and low irritation. In terms of, it was not sufficiently satisfactory at a practical level.

[0003]

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a detergent composition having a low irritation, an excellent foaming property and a good feeling in use.

[0004]

Under the circumstances, as a result of intensive investigations by the present inventors, as a result of the combination of an amphoteric surfactant and a secondary amide type N-acyl amino acid salt having a specific structure, The present invention has been completed by finding that a detergent composition having excellent foamability, no irritation to the skin and the like, good foam breakage and slippage after washing, and having a good feeling in use can be obtained.

That is, the present invention provides the following components (A) and (B) (A) a secondary amide type N- represented by the following general formula (1).
Acyl amino acid salt R ¹ CONH (CH ₂ ) _n COOM ¹ (1) (In the formula, R ¹ CO represents a linear acyl group having 10 to 16 carbon atoms, n represents a number of 1 or 2, and M ¹ represents When n is 1, sodium, potassium or alkanolammonium is shown, and when n is 2, potassium or alkanolammonium is shown. (B) An amphoteric surfactant is contained. Is.

The secondary amide type N-acyl amino acid salt of the component (A) used in the present invention has the property of reacting with calcium contained in tap water to form plate crystals with high lubricity. It shows the effect of imparting a good feeling of use such as slippage after washing to a detergent composition containing the above. Here, the lubricity of the plate-like crystals produced by the reaction of the secondary amide type N-acyl amino acid salt and calcium is, for example, the plate on which dried pork skin (Aloask, manufactured by Antibody Chemical Industries) is regenerated with physiological saline. It is determined by measuring the coefficient of static friction of crystal-like crystals, and those having a coefficient lower than that of the blank from the time of containing water to the time of drying are evaluated as good.

In the above-mentioned secondary amide type N-acyl amino acid salt, in the general formula (1), the linear acyl group represented by R ¹ CO has 10 to 16 carbon atoms, particularly 12 to 14 carbon atoms.
Is preferable, and specifically, a caprinoyl group, a lauroyl group, or a myristoyl group is preferable. When the number of carbon atoms exceeds 16, it is not preferable because the lubricity of the plate-like crystals to be formed is lowered, and when the number of carbon atoms is less than 10, foaming is lowered, which is not preferable. In addition, it is very important that the secondary amide type N-acyl amino acid salt has a secondary amide type structure in which the N-acyl group is composed of the linear acyl. That is, when the acyl group constituting the N-acyl group is branched or the amide structure is a tertiary amide type, the production of plate crystals is suppressed, and the physical properties of the produced crystals are poor in lubricity. However, it is difficult to obtain a desirable feeling because it is sticky. Further, in the general formula (1), the one in which n is 2 and M ¹ is a sodium salt has a high Kraft point and is inferior in water solubility, so that it is not preferable when used in a liquid detergent.

Examples of the amphoteric surfactant as the component (B) used in the present invention include carbobetaine surfactants, amidobetaine surfactants, sulfobetaine surfactants,
Examples thereof include betaine-based surfactants such as hydroxysulfobetaine-based surfactants, amide sulfobetaine-based surfactants and phosphobetaine-based surfactants.

More specific examples of the betaine-based surfactant in the present invention include the following. (1) A carbobetaine-based surfactant having an alkyl group, an alkenyl group, or an acyl group having 8 to 24 carbon atoms. (2) An amidobetaine-based surfactant having an alkyl group, an alkenyl group, or an acyl group having 8 to 24 carbon atoms. (3) A sulfobetaine-based surfactant having an alkyl group, an alkenyl group, or an acyl group having 8 to 24 carbon atoms. (4) A hydroxysulfobetaine-based surfactant having an alkyl group, an alkenyl group, or an acyl group having 8 to 24 carbon atoms. (5) An amide sulfobetaine-based surfactant having an alkyl group, an alkenyl group, or an acyl group having 8 to 24 carbon atoms. (6) A phosphobetaine-based surfactant having an alkyl group, an alkenyl group, or an acyl group having 8 to 24 carbon atoms.

Preferable examples of the component (B) include coconut oil alkyldimethylaminoacetic acid betaine, coconut oil fatty acid amidopropyldimethylaminoacetic acid betaine, stearyldihydroxyethylaminoacetic acid betaine, laurylhydroxysulfobetaine, laurylsulfobetaine, laurylphosphonate. Examples include betaine.

These betaine surfactants as the component (B) can be used either individually or in combination of two or more, and are used in an amount of 0.5 to 25% by weight, particularly 1 to 25% by weight, based on the total composition of the detergent of the present invention. It is preferable to add 10% by weight.

Component (A) in the cleaning composition of the present invention
The mixing ratio of the component (B) and the component (B) is A / B = 100/1 by weight.
˜2 / 1, especially 50/1 to 5/1 are preferred. The total amount of the components (A) and (B) varies depending on the dosage form of the detergent composition, but is 5 to 50% by weight in the case of a liquid detergent and 15 to 70% by weight in the case of a paste detergent. %, And in the case of a solid detergent, it is preferably 40 to 95% by weight.

By adding a higher fatty acid salt (C) to the detergent composition of the present invention, in addition to the above characteristics,
Furthermore, a detergent having a good foaming property and a good foam feeling can be obtained. Here, examples of the higher fatty acid salt (C) include basic salts of fatty acids having 8 to 22 carbon atoms. Specific examples include single fatty acids such as lauric acid, myristic acid, palmitic acid, isostearic acid and oleic acid, as well as basic salts of mixed fatty acids such as coconut oil fatty acid and tallow fatty acid. Here, as the salt, inorganic basic salts such as sodium and potassium, ammonium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt (hereinafter abbreviated as TEA), 2-amino-2-methylpropanol, 2- Examples thereof include alkanolamine salts such as amino-2-methylpropanediol and basic amino acids such as lysine and arginine. These higher fatty acid salts (C) do not necessarily have to be blended as fatty acid salts, and fatty acids and bases may be blended independently to form fatty acid salts in the formulation system. These higher fatty acid salts may be used alone or in combination of two or more. The blending amount of the higher fatty acid salt (C) in the detergent composition of the present invention varies depending on the blending amounts of the components (A) and (B).
(C) / (A) + (B) = 1/20 to 1/2 by weight ratio,
Particularly preferably 1/10 to 1/3.

The detergent composition of the present invention includes other surfactants such as alkyl sulfates, alkyl sulfonates, polyoxyethylene alkyl sulfates, alkylbenzene sulfonates, N-acyl sarcosine salts and N-acyl salts. Anionic surfactant such as -N-methyl taurine salt, alpha olefin sulfonate, higher fatty acid ester sulfonate, alkyl ether acetate, polyoxyethylene alkyl ether acetate, fatty acid amide, polyoxyethylene alkyl ether, sugar Nonionic surfactants such as ester-based, sugar ether-based, and sugar amide-based surfactants can be optionally used in combination as long as the effects of the present invention are not impaired.

Further, as other additives, components usually used in detergents can be optionally used in combination within a range that does not impair the effects of the present invention. For example, propylene glycol, sorbitol, humectants such as glycerin, carboxyvinyl polymer, methyl cellulose, ethanol, viscosity modifiers such as polyoxyethylene glycol distearate, pearling agents, fragrances, dyes, ultraviolet absorbers, antioxidants, A bactericidal agent, an anti-inflammatory agent, a preservative and the like can be added.

The detergent composition of the present invention is manufactured by a conventional method and can be made into a paste form, a gel form, a liquid form, a solid form or the like, and is suitable as a detergent for the body such as skin or hair. In particular, it is preferably used for cleaning the skin.

[0017]

EXAMPLES Next, the present invention will be described in detail based on examples. However, the present invention is not limited to the examples shown below.

Example 1 A detergent composition having the composition shown in Table 1 and Table 2 below was prepared, and the foaming amount of each of these detergent compositions was measured by the following method, and the feeling of use was also determined by the following method. It evaluated based on the method and criteria. The results are shown in Tables 1 and 2 below. In addition, No. The detergent compositions of 16 to 18 are comparative products.

(Measurement of Bubbling Amount) A 20-fold diluted aqueous solution is prepared for each detergent composition, and 100 ml of this solution (liquid temperature 40 ° C.) is poured into a graduated cylinder. Then
A stirring blade was installed in the above solution, and the volume (ml) of the foam generated 30 seconds after the start of stirring was measured and defined as the foaming amount. The rotation speed of the stirring blade is 1000 rpm, and
Reversed every second.・ Evaluation criteria ◎; foaming amount of 250 ml or more ○; foaming amount of 200 ml or more and less than 250 ml △; foaming amount of less than 200 ml (evaluation of feeling of use) For each cleaning composition, 10 parts for each gender
A famous panelist was made to wash his body and sensory evaluation was performed. For evaluation, an average value was calculated according to the following criteria, and when the average value was 4.5 or more, it was very good (⊚), 3.5 to 4.
The case of 4 was judged to be good (◯), the case of 2.5 to 3.4 was normal (Δ), and the case of 2.4 or less was judged to be bad (x). (1) Defoaming during rinsing 5; Good defoaming 4; Good defoaming 3; Normal 2; Bad defoaming 1; Bad defoaming (2) Sliding during rinsing, (3) After rinsing And (4) slippage after drying 5; good slippage 4; good slippage 3; normal 2; poor slippage 1; bad slippage

[0020]

[Table 1]

[0021]

[Table 2]

Example 2 (Compounding composition) (% by weight) (1) Lauroyl-β-alanine TEA 27 (2) Lauryl dimethylamino-2-hydroxypropyl sulfobetaine 3 (3) TEA 4 laurate (4) Myristin Acid TEA 2 (5) Fragrance 0.5 (6) Dibutylhydroxytoluene 0.2 (7) Ethanol 3 (8) Purified water balance In accordance with the above composition, the above components (1) to (4) are dissolved in heated water. After cooling, the above components (5) to (7) are added,
A liquid detergent composition was prepared. When the body was washed with the obtained detergent composition, it was found to have good foaming and defoaming, and good slipperiness from the time of rinsing to the time of drying, resulting in excellent usability.

Example 3 (Compounding composition) (% by weight) (1) Lauroyl-β-alanine K 20 (2) Lauryl dimethylamino-2-hydroxypropyl sulfobetaine 2 (3) Laurate K 2 (4) Myristin Acid K 2 (5) Fragrance 0.5 (6) Dibutylhydroxytoluene 0.3 (7) Ethanol 4 (8) Purified water balance According to the above composition, the above components (1) to (4) are dissolved in heated water. After cooling, the above components (5) to (7) are added,
A liquid detergent composition was prepared. When the body was washed with the obtained detergent composition, it was found to have good foaming and defoaming, and good slipperiness from the time of rinsing to the time of drying, and was excellent in usability.

[0024]

The cleaning composition of the present invention has a high foaming power,
Not only is it less irritating to the skin and hair, but it also has good foam breakage and slippage after washing, and has a good feeling in use, and is particularly suitable for washing the skin.

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Claims (2)

[Claims] 1. The following components (A) and (B) (A) A secondary amide type N- represented by the following general formula (1):
Acyl amino acid salt R ¹ CONH (CH ₂ ) _n COOM ¹ (1) (In the formula, R ¹ CO represents a linear acyl group having 10 to 16 carbon atoms, n represents a number of 1 or 2, and M ¹ represents When n is 1, sodium, potassium or alkanolammonium is shown, and when n is 2, potassium or alkanolammonium is shown. (B) An amphoteric surfactant is contained, The cleaning composition characterized by the above-mentioned. 2. The cleaning composition according to claim 1, which further comprises (C) a higher fatty acid salt.