JPH083030A - Skin cleansing composition - Google Patents

Abstract

PURPOSE:To obtain a composition for cleansing the skin, excellent in foaming power, capable of simultaneously washing foulings sticking to the skin surface and sulci cutis and providing an excellent touch due to the lubricity on the skin in use, hardly causing irritation to the skin after the use and providing a good touch. CONSTITUTION:This composition for cleansing the skin contains (A) 1-90wt.% higher fatty acid salt, e.g. potassium laurate or potassium myristate, (B) 0.01-20wt.% water-insoluble solid powder, e.g. an inorganic substance powder having 0.01-10mum average particle diameter or an organic substance powder having 10mum to 1mm average particle diameter, (C) 0.1-30wt.% amino acid-based surfactant having acylated N, e.g. an acylaminocarboxylic acid, an acylaminosulfonic acid or an amidoamine type amphoteric surfactant and further, as necessary, (D) 0.1-10wt.% amine oxide, e.g. a compound of the formula (R1 is a 10-20C alkyl or alkenyl; R2 and R3 are each a 1-3C alkyl). The foaming power and touch after use thereof are more improved by blending the ingredient (D) therein.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cleansing composition, and more particularly, it has an excellent foaming power and is capable of cleaning dirt adhering to the skin surface and sulcus and at the same time smoothing the skin. The present invention relates to a cleansing composition which gives a better feeling, less irritation to the skin after use, and a good feeling.

[0002]

2. Description of the Related Art Conventionally, higher fatty acid salts have been widely used as cleaning ingredients for soaps and the like, and are well known for giving a refreshing feel. For example, lauric acid triethanolamine salt and lauric acid potassium salt are often used as liquid soap, and myristic acid potassium salt is often used as a main component of a paste-like detergent. However, since these ingredients remove too much sebum at the time of use, lubricity on the skin becomes poor, giving a large squeaky feeling and an unpleasant sensation, and at the same time, it makes the face, hands, body, etc. feel tight and dry after use. There is a problem of giving a feeling.

Further, the amino acid-based surfactant having an acylated N has a characteristic of being less irritating to the skin, but when it is used alone, its foaming property and detergency are not sufficient, It has a slimy feel when used and lacks a refreshing feel even after use.

On the other hand, the water-insoluble solid powder is known to be excellent in lubricity on the skin and to be effective in cleaning the dirt adhering to the skin surface and sulcus, and higher fatty acids. It has been proposed to mix a water-insoluble powder in order to improve the feeling of use of a detergent containing a salt and a sugar-based surfactant (Japanese Patent Laid-Open No. 372700/1992). Not only is there a problem in feeling, but it is not known what kind of result will be produced when the water-insoluble powder is mixed with detergents having different powder stability and composition. Further, even if only a nonionic surfactant such as a sugar-based surfactant is combined with the water-insoluble powder, the detergency due to the synergistic effect is not sufficient.

It is known that amine oxide, when used alone, is irritating to the skin, has poor foaming properties and detergency, and gives a noticeable slimy feel during use.

DISCLOSURE OF THE INVENTION The present inventors have solved the drawbacks of higher fatty acid salt-based surfactants, have a good foaming power and show a creamy foam quality, and remove stains adhering to the skin surface and sulci. Repeated research to develop a detergent composition that gives a refreshing feel with no slippery feeling or blemishes due to lubricity on the skin at the same time of washing and less irritation to the skin after use. It was

[0006]

As a result, by adding an amino acid-based surfactant having an acylated N to a mixed solution of a higher fatty acid salt and a water-insoluble solid powder, the above-mentioned effects can be obtained and the stability can be extremely improved. I have found that an excellent composition can be obtained.

Further, it has been found that when an amine oxide is added to this composition, the foaming property and the feeling after use can be further improved without impairing the above effects.

The present invention is based on these findings,
(1) Skin characterized by containing (A) a higher fatty acid salt, (B) a water-insoluble solid powder and (C) an amino acid-based surfactant having an acylated N, or (D) an amine oxide. It relates to a cleaning composition.

Examples of the higher fatty acid salt as the component (A) used in the present invention include salts of fatty acids having 8 to 22 carbon atoms and bases. Specifically, in addition to single fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, and oleic acid, coconut oil fatty acid,
Mention may be made of salts of mixed fatty acids such as beef tallow fatty acids and bases. Examples of the base that forms a salt here include inorganic bases such as sodium, potassium, and calcium, ammonium, monoethanolamine, diethanolamine, triethanolamine, 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol. Basic amino acids such as alkanolamines, lysine, and arginine are used. These higher fatty acid salts (A)
Does not necessarily have to be blended as a fatty acid salt, and a fatty acid and a base may be blended alone to form a fatty acid salt in the formulation system. These higher fatty acid salts may be used alone or in combination of two or more. However, if the order of addition is not proper or the temperature conditions are not proper, it is necessary to note that a sparingly soluble gel may occur. Generally, a higher fatty acid oil phase heated to 70 ° C. or higher,
It is preferable to generate the higher fatty acid salt by a method of adding an aqueous phase in which a base and water are dissolved, but at this time, a production facility with a strong stirring force is necessary because a region of high viscosity is generated during the addition of the aqueous phase. is there.

The content of the component (A) in the detergent composition of the present invention varies depending on the dosage form, but is preferably 1 to 90% by weight (hereinafter, simply expressed as%), particularly preferably 1 to 50%.

As the water-insoluble solid powder of the component (B),
Examples of the inorganic powders include bentonite, talc, mica, mica, sericite, silica, titanium oxide, barium sulfate, and calcium carbonate. The water-insoluble solid powder may be a powder of an organic inorganic substance obtained by modifying an inorganic substance with an organic reaction agent such as a quaternary ammonium salt, and examples thereof include distearyldimethylammonium chloride-treated bentonite and dimethyldistearylammonium chloride. Examples of the powder include treated hectorite and benzyldimethylstearyl ammonium chloride-treated hectorite. Further, as organic powder, natural polymer powder such as cellulose-for example, hydrocarbon polymer such as polyethylene, polypropylene and polystyrene, polyamide polymer such as nylon, polyvinyl chloride, polyacrylonitrile, polyvinyl acetate, polyvinylidene fluoride, etc. Examples thereof include synthetic polymer powders such as vinyl polymers, polyester polymers, polyurethane polymers, and copolymers of these.

The average particle size of the water-insoluble solid powder (B) is 0.01 to 100 in the case of inorganic powder and organic inorganic powder.
μm, particularly 0.01 to 10 μm is preferable, and in the case of organic powder, 0.01 μm to 1 mm, particularly 10 μm to 1 mm is preferable. These water-insoluble solid powders may be used alone or in combination of two or more. However, in order to obtain a composition having good dispersion stability, in order to prevent aggregation and settling of the water-insoluble solid powder, a high concentration (20 to 50%) of powder dispersion in which the water-insoluble powder is sufficiently wetted with a higher fatty acid salt in advance. It is preferable to prepare a liquid and mix it with a higher fatty acid salt to prepare a mixed liquid of the higher fatty acid salt and the water-insoluble powder. Generally, when an organic powder is used, a powder whose particle size, shape and hardness are selected in advance may be used. In order to prepare the water-insoluble powder dispersion liquid using the inorganic powder and the organic inorganic powder, it is preferable that the particle size and shape are arbitrarily adjusted by using a disper, a colloid mill, a homomixer or the like in the step.

The content of the component (B) in the detergent composition of the present invention varies depending on the dosage form, but is preferably 0.01 to 20%, particularly preferably 0.05 to 10%.

The component (C), an amino acid-based surfactant having an acylated N, is a general term for surfactants having an acidic group such as a carboxyl group or a sulfonic acid group in addition to the acylated N. . It includes surfactants such as acylaminocarboxylic acids, acylaminosulfonic acids or amidoamine type amphoteric surfactants (commonly known as imidazoline type or betaine type amphoteric surfactants). The amidoamine type surfactant does not have an acylated N in a state of forming an imidazoline ring, but when dissolved in water, the N-acylated amine acid group or a quaternary ammonium salt type N is formed by ring cleavage when dissolved in water. Known to produce. The acyl group usually has a large number of carbon atoms of 10 to 20.

Examples of acylaminocarboxylic acid or sulfonic acid type surfactants include N-acyl sarcosine,
N-acyl alanine, N-acyl taurine, N-acyl glutamic acid etc. are mentioned. These are usually used in the form of organic ammonium salts such as alkali metal salts and ethanolamine salts. N-acyl glutamate can form a mono-salt and a di-salt, but either one may be used.

Examples of the amidoamine salt type surfactant include 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, coconut oil alkyl-N-carboxyethyl-N-hydroxyethylimidazolinium betaine, 2-beef tallow alkyl (or undecyl) -N-hydroxyethyl-N-carboxymethyl imidazolinium betaine and the like can be mentioned, which has an amino group or ammonium group and a carboxyl group which are acylated by cleavage of the imidazoline ring in water. It becomes a surfactant.

Specific examples of the acylaminocarboxylic acid type or acylaminosulfonic acid type surfactants include cocoyl sarcosine sodium, lauroyl sarcosine sodium, myristoyl sarcosine sodium, cocoyl sarcosine potassium, sodium lauroyl alanine,
Sodium cocoyl alanine, Sodium myristoyl alanine, Sodium cocoyl glutamate, Sodium lauroyl glutamate, Sodium myristoyl glutamate, Sodium palmitoyl glutamate, Sodium stearoyl glutamate, Sodium cocoyl taurine, Sodium lauroyltaurine, Sodium myristoyl taurine, Sodium palmitoyl taurate, Stearoyl taurine sodium Examples thereof include potassium, lauroyl taurine potassium, and myristoyl taurine potassium. These amino acid-based surfactants having an acylated N may be used alone or in combination of two or more.

The content of the component (C) in the detergent composition of the present invention varies depending on the dosage form, but is 0.1% to 30%, particularly 1 to
10% is preferable.

As the amine oxide as the component (D),
For example, those represented by the following general formula can be given.

[0020]

Embedded image (In the formula, R ₁ represents an alkyl or alkenyl group having 10 to 20 carbon atoms, and R ₂ and R ₃ 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 dimethylamine oxide etc. are mentioned.
These amine oxides may be used alone or in combination of two or more.

The content of the component (D) in the detergent composition of the present invention varies depending on the dosage form, but is 0.1 to 10%, particularly 0.1.
-5% is preferable.

In the detergent composition of the present invention, in addition to the above-mentioned essential components, components usually used as a detergent can be optionally used in combination within a range that does not impair the effects of the invention. For example, alcohols such as ethanol, isopropanol and butanol, polyols such as propylene glycol, sorbitol and glycerin, carboxyvinyl polymers, polymer compounds such as methylcellulose, polyoxyethylene glycol, polyoxyethylene polyoxypropylene copolymer, squalane. , Squalene, liquid paraffin, lanolin derivative, fatty acid, higher alcohol, super fat agent such as polyether modified silicone, pearling agent, fragrance, dye, UV absorber, antioxidant, bactericide, anti-inflammatory agent, preservative, etc. Can be blended.

The dosage form of the detergent composition of the present invention is preferably liquid or paste, but may be dry powder if necessary. To prepare the liquid or paste-like detergent composition, for example, a method of adding a water phase in which a base and water are dissolved to an oil phase of a higher fatty acid heated to 70 ° C. or higher according to a conventional method After producing the higher fatty acid salt with, a high concentration (20 to 50%) powder dispersion liquid in which the water-insoluble solid powder is sufficiently wetted with the higher fatty acid salt is added in advance and uniformly mixed and dispersed with the higher fatty acid salt. A mixture of higher fatty acid salt and powder is prepared. A mixture of the higher fatty acid salt and the powder is uniformly mixed with an acylated amino acid surfactant having N, or further with amine oxide,
After being dispersed, the product can be finished by cooling.
The components (C) and / or (D) contribute as a surfactant for obtaining a product bulk liquid in which the water-insoluble powder is stably dispersed.

Next, the present invention will be described in detail with reference to examples, but the present invention is not limited thereto.

Example 1 A cleaning composition was prepared by uniformly mixing the components shown in Table 1. About the obtained detergent composition, specialized panel 1
Asked 0 people to wash their hands, its foaming ability, the feeling during use,
Regarding the feel of the skin after washing, sensory evaluation was performed according to the following criteria. Further, each of the obtained detergent compositions was filled in a glass screw tube and sealed, and stored for 1 month in a constant temperature bath at 0 to 5 ° C and for 1 month in a constant temperature bath at 40 ° C. Regarding the preserved product, the liquid state of the contents was observed, and the stability was evaluated according to the following criteria.
Table 1 shows the results.

[0026]

[Table 1]

Sensory Evaluation Criteria Stability Evaluation Criteria Very good ... ◎ Uniform liquid ・ ・ ・ ◎ Good ・ ・ ・ ○ Very slight separation ・ ・ ・ ○ Not very good ・ ・ ・ △ Clear separation ・ ・ ・△ Poor ・ ・ ・ × No fluidity ・ ・ ・ ×

As is clear from Table 1, (A) and (B)
And the cleaning composition of the present invention containing the three components (C) and the cleaning composition of the present invention containing the component (D) therein, have foaming properties, feel during use, and after cleaning compared to the control product. The skin feel, 0-5 ° C storage stability and 40 ° C storage stability were all excellent.

Example 2 (Body shampoo) (Composition) (%) Potassium laurate 10.0 Potassium myristate 10.0 Talc 0.3 Lauroyl methyl taurine sodium 5.0 Lauric acid diethanolamide 3.0 Ethylene glycol distearate 1.5 Propylene glycol 3.0 Water balance ───────────────────────────── Total 100.0

With the above composition, the foaming property is excellent and a creamy foam quality is exhibited, and the dirt adhering to the skin surface and sulcus is washed, and at the same time, the lubricity on the skin at the time of use causes a slimy feel and a stain. A body shampoo having no feeling, less irritation to the skin after use and a refreshing feel was obtained. This body shampoo was also excellent in stability at low and high temperatures.

Example 3 (Facial cleansing foam) (Composition) (%) Potassium laurate 4.0 Potassium myristate 25.0 Potassium palmitate 2.5 Potassium stearate 2.5 Silica 1.0 Lauroyl sarcosine sodium 3.0 Lauryl dimethylamine oxide 1.0 Glycerin 10.0 Water balance ────────────────────────────── Total 100.0

With the above composition, the foaming property is excellent and a creamy foam quality is exhibited, and at the same time, the dirt adhering to the skin surface and the skin groove is washed, and at the same time, the lubricity on the skin at the time of use causes a slimy feel and a stain. A face cleansing foam having no feeling, less irritation to the skin after use, and giving a refreshing feel was obtained. Further, this facial cleansing foam was also excellent in stability at low and high temperatures.

[0033]

EFFECT OF THE INVENTION The cleaning composition of the present invention has an excellent foaming power and exhibits a creamy foam quality. It cleans stains adhering to the skin surface and skin crevices, and at the same time, it has a smoothness on the skin during use. It has no slimy feeling or blemishes, has less irritation to the skin after use, and gives a refreshing feeling, and is particularly effective for cleaning the skin of the face, hands, head, body and the like. It also has excellent storage stability.

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Claims (2)

[Claims] 1. A skin cleansing composition comprising (A) a higher fatty acid salt, (B) a water-insoluble solid powder, and (C) an amino acid-based surfactant having an acylated N. 2. A skin comprising (A) a higher fatty acid salt, (B) a water-insoluble solid powder, (C) an amino acid surfactant having an acylated N, and (D) an amine oxide. Cleaning composition.