JP3087400B2 - Detergent composition - Google Patents

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 skin composition and a hair, which have a low irritation, a very good foaming property, and an excellent feeling upon use after washing. The present invention relates to a cleaning composition.

[0002]

2. Description of the Related Art Body cleansing compositions generally contain an anionic surfactant as a main component, and soap or higher fatty acid salts for skin cleansing, and alkyl sulfates or alkyl sulfones for hair cleansing. Acid salts are mainly used. Soaps used for skin cleansing have the disadvantage of causing squeaks and tension during rinsing, and alkyl sulfates and alkyl sulfonates used for hair cleansing are:
Although excellent in detergency, there was a problem in terms of irritation.

[0003] Therefore, the use of a specific N-acylated amino acid type surfactant as a main base of a detergent has been studied as a surfactant having excellent feeling upon use and low irritation.
This alone was not sufficiently satisfactory on a practical level in terms of foaming properties.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a detergent composition having a high foaming power, a low irritation, and a good feeling upon use after washing.

[0005]

Under these circumstances, the present inventors have conducted intensive studies, and as a result, by combining a secondary amide type N-acyl amino acid salt having a specific structure with an amine oxide, the foaming property is improved. The present invention has been found to provide a detergent composition which is excellent in skin resistance, has no irritation to the skin and the like, has no squeak from washing to rinsing, and has good foam removal and sliding after washing.

That is, the present invention relates to the following components (A) and (B): (A) a secondary amide N-type represented by the following general formula (1):
Acyl amino acid salt R ¹ CONH (CH ₂ ) _n COOM ¹ (1) (wherein, R ¹ CO represents a straight-chain acyl group having 10 to 16 carbon atoms, n represents a number of 1 or 2, and M ¹ represents When n is 1, it represents sodium, potassium or alkanolammonium, and when n is 2, it represents potassium or alkanolammonium.) (B) An amine oxide is provided. .

The secondary amide type N-acyl amino acid salt of the component (A) used in the present invention has a property of reacting with calcium contained in tap water or the like to form plate crystals having high lubricity. The compound has an effect of imparting a good feeling of use such as slippage after washing to a detergent composition containing the same. Here, the lubricity of the plate-like crystals formed by the reaction between the secondary amide type N-acylamino acid salt and calcium is determined, for example, by examining the plate on dried pork skin (Aloask, manufactured by Antibody Chemical Industry) on physiological saline. The coefficient of static friction of the crystal is determined by measuring the coefficient of static friction, and a coefficient from the time of wetness to the time of drying is lower than that of the blank, and 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, particularly 12 to 14 carbon atoms.
And specifically, a caprinoyl group, a lauroyl group or a myristoyl group is preferred. If the number of carbon atoms exceeds 16, the lubricating properties of the resulting plate-like crystal will decrease, which is not preferable. If the number of carbon atoms is less than 10, foaming will decrease, which is not preferable. 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 when the amide structure is a tertiary amide type, the formation of plate-like crystals is suppressed or the properties of the generated crystals are poor in lubricity. It is difficult to obtain a preferable feeling because of stickiness. Further, those in which n is 2 and M ¹ is a sodium salt in the general formula (1) have a high Kraft point and are inferior in water solubility, and therefore are not preferred when used as a liquid detergent.

The amine oxide of the component (B) used in the present invention includes, for example, those represented by the following general formula (2).

[0010]

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Wherein R ² represents an alkyl or alkenyl group having 10 to 20 carbon atoms, and R ³ and R ⁴ each represent an alkyl group having 1 to 3 carbon atoms.

Specific examples of such an amine oxide include lauryl dimethyl amine oxide, myristyl dimethyl amine oxide, palmityl dimethyl amine oxide, stearyl dimethyl amine oxide and the like.

Further, as the amine oxide of the component (B), cocoamidopropylamine oxide represented by the following general formula (3) can also be used.

[0014]

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(Wherein R ⁵ CO represents an acyl group derived from coconut oil fatty acid) These amine oxides can be used alone or in combination of two or more.

The amount of the component (B) to be added to the detergent composition of the present invention varies depending on the dosage form, but may be from 0.1 to 10% by weight, especially from 1 to 10% by weight.
~ 5% by weight is preferred.

Component (A) in the cleaning composition of the present invention
A / B = 100/1 in terms of weight ratio with the component (B).
To 2/1, particularly preferably 50/1 to 5/1. The total amount of the components (A) and (B) varies depending on the type of the detergent composition, but is 5 to 50% by weight of the composition for a liquid detergent, and 15 to 70% by weight for a paste-like detergent. % By weight, and 40 to 95% by weight in the case of a solid detergent.

The detergent composition of the present invention may further contain a higher fatty acid salt (C) to provide the above-mentioned properties.
Further, a detergent having good foaming properties and good foam feel can be obtained. Here, examples of the higher fatty acid salt (C) include a base salt of a fatty acid having 8 to 22 carbon atoms. Specific examples include base salts of single fatty acids such as lauric acid, myristic acid, palmitic acid, isostearic acid, and oleic acid, as well as mixed fatty acids such as coconut oil fatty acids and tallow fatty acids. Here, examples of the salt include inorganic basic salts such as sodium and potassium, ammonium salts, monoethanolamine salts, diethanolamine salts, triethanolamine salts (hereinafter abbreviated as TEA), 2-amino-2-methylpropanol, and 2-amino-2-methylpropanol. 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 need to be compounded as fatty acid salts, and fatty acids and bases may be independently compounded to form fatty acid salts in a formulation. 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) in the detergent composition of the present invention varies depending on the amounts of the components (A) and (B).
(C) / (A) + (B) = 1/20 to 1/2 by weight ratio,
In particular, 1/10 to 1/3 are preferable.

The detergent composition of the present invention contains other surfactants such as alkyl sulfate, alkyl sulfonate, polyoxyethylene alkyl sulfate, alkylbenzene sulfonate, N-acyl sarcosine, N-acyl. Anionic surfactants such as -N-methyltaurine salt, alpha olefin sulfonate, alkyl ether acetate, polyoxyethylene alkyl ether acetate, fatty acid amide, polyoxyethylene alkyl ether, sugar ester, sugar ether, A nonionic surfactant such as a sugar amide and an amphoteric surfactant such as an imidazoline and a betaine can be optionally used in combination as long as the effects of the present invention are not impaired.

Further, as other additives, components commonly used in detergents can be optionally used in combination as long as the effects of the present invention are not impaired. For example, humectants such as propylene glycol, sorbitol and glycerin, carboxyvinyl polymers, methylcellulose, ethanol, viscosity modifiers such as polyoxyethylene glycol distearate, pearling agents, fragrances, dyes, ultraviolet absorbers, antioxidants, A bactericide, an anti-inflammatory agent, a preservative and the like can be added.

The detergent composition of the present invention can be produced by a conventional method and can be in the form of a paste, gel, liquid, or solid, and is suitable as a detergent for the body such as skin or hair. It is particularly preferable to use it for skin washing.

[0022]

Next, the present invention will be described in detail with reference to examples. However, the present invention is not limited to the embodiments described below.

Example 1 A cleaning composition having the composition shown in Tables 1 and 2 below was prepared, and the foaming amount of each of these cleaning compositions was measured by the following method. The evaluation was based on the method and criteria. The results are shown in Tables 1 and 2 below. In addition, No. The cleaning compositions 13 to 15 are comparative products.

(Measurement of Foaming Amount) For each detergent composition, a 20-fold diluted aqueous solution is prepared, and 100 ml of this solution (liquid temperature 40 ° C.) is poured into a graduated cylinder. Then
The stirring blade was placed in the above solution, and the volume (ml) of the foam generated 30 seconds after the start of the stirring was measured to determine the foaming amount. The rotation speed of the stirring blade was 1000 rpm, and
Inverted every second. Evaluation criteria 基準: Foaming amount 250 ml or more ○: Foaming amount 200 ml or more and less than 250 ml △: Foaming amount less than 200 ml (Evaluation of feeling of use)
A panel of names was used to wash the body, and a sensory evaluation was performed. In the evaluation, an average value was calculated according to the following criteria, and when the average value was 4.5 or more, very good (◎), 3.5 to 4.0.
The case of 4 was judged as good (○), the case of 2.5 to 3.4 was judged as normal (△), and the case of 2.4 or less was judged as bad (×). (1) Bubble removal during rinsing 5; Bubble removal is good 4; Bubble removal is slightly good 3; Ordinary 2: Bubble removal is slightly bad 1; Bubble removal is poor (2) Slip during rinsing, (3) After rinsing Slip and (4) Slip after drying 5; Slip good 4; Slightly good 3; Normal 2; Slightly bad 1;

[0025]

[Table 1]

[0026]

[Table 2]

Example 2 (Blending composition) (% by weight) (1) Lauroyl-β-alanine TEA 27 (2) Lauryl dimethylamine oxide 3 (3) TEA 4 laurate (4) TEA 2 myristate (5) Fragrance 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) ) To (7)
A liquid detergent composition was prepared. When the body was washed with the obtained detergent composition, the foaming and foaming were good, there was no creaking during washing and rinsing, and the sliding was good from rinsing to after drying, and the feeling of use was excellent.

Example 3 (Blending composition) (% by weight) (1) Lauroyl-β-alanine K 20 (2) Lauryl dimethylamine oxide 2 (3) Lauric acid K 2 (4) Myristic 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, and after cooling, the above (5) ) To (7)
A liquid detergent composition was prepared. When the body was washed with the obtained detergent composition, it was found that the foaming and foaming were good, and the slick was good from the time of rinsing to the time after drying, and the feeling of use was excellent.

[0029]

The cleaning composition of the present invention has a high foaming power,
Not only is it less irritating to skin and hair, it has no squeak from washing to rinsing, it has good foaming and slip after washing, and has a good feeling of use, and is particularly suitable for skin washing. .

Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) C11D 1/10 A61K 7/075 A61K 7/50 C11D 1/75 CA (STN) REGISTRY (STN)

Claims (2)

(57) [Claims] 1. The following components (A) and (B): (A) a secondary amide-type N-amine represented by the following general formula (1):
Acyl amino acid salt R ¹ CONH (CH ₂ ) _n COOM ¹ (1) (wherein, R ¹ CO represents a straight-chain acyl group having 10 to 16 carbon atoms, n represents a number of 1 or 2, and M ¹ represents When n is 1, it represents sodium, potassium or alkanol ammonium, and when n is 2, it represents potassium or alkanol ammonium.) (B) A cleaning composition comprising an amine oxide. 2. The cleaning composition according to claim 1, further comprising (C) a higher fatty acid salt.