JP2630528B2 - 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 personal cleansing composition, and more particularly, to a personal cleansing composition which has a low irritation to the skin and hair, a high foaming power and a good feeling upon use.

[0002]

2. Description of the Related Art A body cleansing composition generally contains an anionic surfactant as a main component.
Soaps, i.e. higher fatty acid salts, also for hair washing
Alkyl sulfates and alkyl sulfonates are mainly used. Soaps used for skin cleansing have the disadvantage of causing squeaks and tension when rinsed.Alkyl sulfates and alkyl sulfonates used for hair cleansing have excellent detergency but are problematic in terms of irritation. was there.
Therefore, it has been studied to use a specific N-acylated amino acid type surfactant as a main base of a detergent as a surfactant having excellent feeling in use and having low irritation. In terms of the above, it was not sufficiently satisfactory at a practical level.

[0003]

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.

[0004]

Under these circumstances, the present inventors have conducted intensive studies, and as a result, have found that a secondary amide type N-acyl amino acid salt having a specific structure and a fatty acid amide derivative are combined and blended. Excellent foam, skin,
The present inventors have found that a cleaning composition which has no irritation to hair and the like, has good foaming and slippage after washing, and has a good feeling in use can be obtained, and completed the present invention.

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):
Acylamino acid salt R ¹ CONH (CH ₂ ) _n COOM ¹ (1) (wherein, R ¹ CO represents a linear acyl group having 10 to 16 carbon atoms, n represents 1 or 2, and M ¹ represents (B represents potassium or alkanol ammonium) (B) Fatty acid amide derivative represented by the following general formula (2)

[0006]

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(Wherein, R ² represents an alkyl group having 8 to 20 carbon atoms, R ³ and R ⁴ are the same or different and each represent a hydrogen atom,
Alkyl group having 1 to 3 carbon atoms, or hydroxyalkyl group having 1 to 3 carbon atoms _{^{- (C 2 H 4 O)}} m H group (wherein m is 2
(Indicating the number of 1 to 4) 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-like 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. When the number of carbon atoms exceeds 16, the lubricating properties of the resulting plate-like crystal are reduced, which is not preferable. When the number of carbon atoms is less than 10, foaming is reduced, which is not preferable. It is very important that the secondary amide N-acyl amino acid salt has a secondary amide 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, in the general formula (1), those in which n is 2 and M ¹ is a sodium salt are not preferred when used as a liquid detergent because of their high Krafft point and poor water solubility.

In the general formula (2) representing the fatty acid amide derivative of the component (B) used in the present invention, the alkyl group represented by R ² has 8 to 20 carbon atoms, preferably 12 to 18 carbon atoms. , R ³ and R ⁴ are preferably a combination in which both are a hydroxyalkyl group, especially a hydroxyethyl group, or a case where one is a hydroxyalkyl group, especially a hydroxyethyl group and the other is a hydrogen atom. The amount of the component (B) to be added to the cleaning composition of the present invention varies depending on the dosage form, but is preferably 0.1 to 10% by weight, particularly preferably 1 to 5% 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) = 1 by weight.
The ratio is from 00/1 to 2/1, preferably from 50/1 to 5/1. The total amount of the components (A) and (B) varies depending on the type of the detergent composition, but 5 to 50% by weight of the liquid detergent and 15 to 70% by weight of the paste. %, And 40 to 95% by weight in the case of a solid detergent.

By further blending a higher fatty acid salt (C) with the detergent composition of the present invention, a detergent having good foaming properties and good foam feeling can be obtained in addition to the above-mentioned properties. . 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. It shows 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 may contain 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, polyoxyethylene alkyl ether, sugar ester, sugar ether, sugar amide A nonionic surfactant such as a nonionic surfactant and an amphoteric surfactant such as an imidazoline-based or betaine-based surfactant can be arbitrarily used in a range that does not impair the effects of the present invention.

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, glycerin, carboxyvinyl polymer, methylcellulose, ethanol,
Viscosity modifiers such as polyoxyethylene glycol distearate, pearlizing agents, fragrances, dyes, ultraviolet absorbers, antioxidants, bactericides, anti-inflammatory agents, preservatives, and the like can be added.

The detergent composition of the present invention can be prepared 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.

[0016]

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 of Nos. 16 to 18 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; Normally 2; Bubble removal is slightly bad 1; Slip and (4) Slip after drying 5; Slip good 4; Slightly good 3; Normal 2; Slightly bad 1;

[0019]

[Table 1]

[0020]

[Table 2]

Example 2 (Blending composition) (% by weight) (1) Lauroyl-β-alanine TEA 27 (2) Lauric acid diethanolamide 3 (3) Lauric acid TEA 4 (4) Myristic acid TEA 2 (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, it was found that the foaming and foaming were good, the slidability 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) Coconut oil fatty acid diethanolamide 2 (3) Lauric acid 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, and after cooling, the above ( 5) to (7) components are added,
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, the slidability was good from rinsing to after drying, and the feeling of use was excellent.

[0023]

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

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location C11D 1:52) (C11D 10/04 1:04 1:52 9:02)

Claims (3)

(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 linear acyl group having 10 to 16 carbon atoms, n represents a number of 1 or 2, and M ¹ represents (B represents potassium or alkanol ammonium) (B) Fatty acid amide derivative represented by the following general formula (2) (Wherein, R ² represents an alkyl group having 8 to 20 carbon atoms;
³ and R ⁴ are the same or different and each represent a hydrogen atom,
Alkyl group, or hydroxyalkyl group having 1 to 3 carbon atoms _{- (C 2 H 4 O)} m H group body, wherein (where m is a number of 2 to 4) to contain the indicating) a Detergent composition. 2. The personal cleansing composition according to claim 1, wherein the mixing ratio of component (A) to component (B) is (A) / (B) = 100/1 to 2/1 by weight. 3. The personal cleansing composition according to claim 1, further comprising (C) a higher fatty acid salt.