JPH05156287A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain the subject composition comprising a calcium insusceptible carboxylic acid type anionic surfactant and a salt of a specific acylamino acid, having low irritation to skin and hair, not causing sliminess, excellent detergency, foam removal and feeling in use, suitable for cleaning skin, etc. CONSTITUTION:The objective composition comprising (A) a calcium insusceptible carboxylic acid type anionic surfactant such as salt of N-acyl-N-alkylamino acid, (B) 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) and preferably (C) a salt of a higher fatty acid such as sodium laurate. The blending ratio of the components A to the component C is preferably A/B=1/8 to 1/1 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 which is mild to skin and hair, has a high detergency, and has an excellent feeling after use.

[0002]

2. Description of the Related Art A detergent composition for body and hair generally contains an anionic surfactant as a main component, and an example of the anionic surfactant is N-acyl amino acid which is a calcium-insensitive carboxylic acid type surfactant. Salt, N-acyl-
N-alkyl amino acid salts, alkyl ether carboxylates and the like are widely used.

However, although the detergents containing these anionic surfactants as the main components are excellent in the washing effect, they are poor in defoaming at the time of rinsing and have a feeling of use such as feeling slimy on the skin after washing. There was a problem in terms.

On the other hand, a surfactant other than an anionic surfactant, for example, a detergent containing an amphoteric surfactant as a main component or an anionic surfactant in a reduced amount is mixed with another surfactant as a main component. Although detergents and the like have been developed, it is difficult to obtain a sufficiently satisfactory detergent because the detergent effect and the foaming power are deteriorated, and the improvement is liable to be restricted by the formulation.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a detergent composition having high detergency, low irritation, and a good feeling after use.

[0006]

[Means for Solving the Problems] Under the circumstances, as a result of intensive investigations by the present inventors, a calcium-insensitive carboxylic acid type anionic surfactant and a calcium-sensitive secondary amide type N-acyl amino acid salt having a specific structure It was found that a detergent composition having excellent cleaning effects, no irritation to the skin, etc., and having good foam breakage and slippage after cleaning can be obtained by blending in combination, and completed the present invention.

That is, the present invention provides the following components (A) and (B) (A) calcium-insensitive carboxylic acid type anionic surfactant (B) 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).

The calcium-insensitive carboxylic acid type anionic surfactant which is the component (A) of the present invention does not easily bind to a divalent metal ion such as calcium ion in water and forms an insoluble salt (scum). It is a carboxylic acid type anionic surfactant that does not form, and specific examples thereof include N-acyl amino acid salts, N-acyl-N-alkyl amino acid salts, and alkyl ether carboxylates.

Here, the amino acid residues of the N-acyl amino acid salt include glutamic acid and aspartic acid, and the amino acid residues of the N-acyl-N-alkyl amino acid salt include glutamic acid, glycine and β-alanine. Is mentioned. In addition, examples of the alkyl group of the N-acyl-N-alkylamino acid salt include methyl, ethyl, propyl, and isopropyl groups. Examples of the acyl group include lauroyl, myristoyl, palmitoyl groups and the like, and salts of these include sodium, potassium, lithium, monoethanolamine, diethanolamine, triethanolamine (hereinafter abbreviated as TEA) and the like salts. Is mentioned. As preferable specific examples of these,
Examples of N-acyl amino acids include N-lauroyl glutamic acid, N-myristoyl glutamic acid and N-cocoyl glutamic acid, and examples of N-acyl-N-alkyl amino acids include N-lauroyl-N-isopropylglycine and N-lauroyl sarcosine. , N-myristoyl sarcosine, N-palmitoyl sarcosine, N-lauroyl-N-methyl-β-alanine and the like, further examples of the alkyl ether carboxylate include polyoxyethylene alkyl ether acetic acid, polyglyceryl alkyl ether acetic acid and the like, These salts such as sodium, potassium, lithium, monoethanolamine, diethanolamine, triethanolamine and the like can be mentioned.

The secondary amide type N-acyl amino acid salt of the component (B) used in the present invention is sensitive to calcium and reacts with calcium contained in tap water or the like to form a plate crystal with high lubricity. Since it has properties, it exhibits an effect of imparting a good feeling in use such as slippage after washing to a detergent composition containing the same. Here, the lubricity of the plate crystal produced by the reaction of the secondary amide type N-acyl amino acid salt and calcium is, for example, dry pig skin (Aloask,
It is determined by measuring the coefficient of static friction of the plate crystals on a regenerated product of Antibody Kasei Kogyo Co., Ltd. with physiological saline, and the coefficient of static friction from the time of hydration to the time of drying is evaluated as good.

In the above secondary amide type N-acyl amino acid salt, the linear acyl group represented by R ¹ CO in the general formula (1) has 10 to 16 carbon atoms, and 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.

Component (A) in the cleaning composition of the present invention
The blending ratio of the component (B) and the component (B) is A / B = 1/10 by weight.
10/1, especially 1/8 to 1/1 are preferred. Further, the total amount of the components (A) and (B) mixed varies depending on the dosage form of the detergent composition, but is 5 to 50% by weight in the composition for a liquid detergent and 15 to 70 for 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,
Further, a detergent having a good foaming property and a good feel of foam 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, 2-amino-2-methylpropanol, 2-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 amount of the higher fatty acid salt (C) added to the detergent composition of the present invention depends on the components (A) and (B).
(C) / (A) + by weight ratio
(B) = 1/20 to 1/2, 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-N-methyl taurine salts. , Alpha olefin sulfonate, higher fatty acid ester sulfonate, alkyl ether acetate, anionic surfactant such as polyoxyethylene alkyl ether acetate, fatty acid amide, polyoxyethylene alkyl ether, sugar ester-based, sugar ether-based A nonionic surfactant such as a sugar amide-based surfactant and an amphoteric surfactant such as an imidazoline-based or betaine-based surfactant may 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 Tables 1 and 2 below was prepared, and the foaming amount of each of the detergent compositions was measured by the following method, and the lubricating plate shape was obtained. The crystal depositability and feeling of use were evaluated based on the following methods and criteria.
The results are shown in Tables 1 and 2 below. In addition, No. Two
2 to 25 detergent compositions 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 is 5
Reversed every second.・ Evaluation criteria ◎; foaming amount of 200 ml or more ○; foaming amount of 150 ml or more and less than 200 ml △; foaming amount of less than 150 ml (evaluation of deposition property of lubricating plate crystals) For each detergent composition, a 20 times diluted aqueous solution is deionized water 1 ml of each of the solutions prepared above was poured into 40 ml of 4 ° DH hard water at 40 ° C, and after 10 seconds, the generation of crystals was visually judged and evaluated according to the following criteria.・ Evaluation Criteria ◎: A large amount of crystals are generated and the liquid becomes cloudy ○: Crystals are generated and the liquid is slightly cloudy ×: No crystals are generated and the liquid is transparent (evaluation of feeling of use) For each cleaning composition, 10 for men and 10 for men
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 (Composition) (% by weight) (1) TEA 15 cocoylglutamate (2) Lauroyl-β-alanine TEA 15 (3) TEA 4 laurate (4) TEA myristic acid 2 (5) Perfume 0 .5 (6) Dibutylhydroxytoluene 0.2 (7) Ethanol 3 (8) Purified water balance According to the above composition, the above components (1) to (4) are dissolved in heated water, and after cooling, the above (5) ~ (7) component is 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-N-methyl-β-alanine Na 10 (2) Lauroyl-β-alanine K 10 (3) Laurate K 2 (4) Myristic acid K 2 (5) Perfume 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 high detergency,
Not only is it less irritating to the skin and hair, it also has good defoaming after washing, does not cause sliminess, 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) Calcium-insensitive carboxylic acid type anionic surfactant (B) 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). 2. The cleaning composition according to claim 1, which further comprises (C) a higher fatty acid salt.