JPH0867622A - Skin cleaning agent - Google Patents

Abstract

PURPOSE: To obtain a pasty or liquid skin-cleaning agent containing a combination of inorganic powder and an anionic surfactant and giving a unique feeling to the skin to form a smooth skin after the cleaning treatment without causing skin stimulation problem. CONSTITUTION: This pasty or liquid skin-cleaning agent contains 15-60% inorganic powder and 0.1-40% anionic surfactant. Preferably the particle shape of the inorganic powder is platy and a mean particle diameter is 1-20μm. Kalin is preferable as the inorganic powder. The skin cleaning agent may be further mixed with 10-50% humectant and optionally 0.05-10% thickener may be mixed. Both of the humectant and the thickener may also be mixed in combination. The skin cleaning agent has an effect of removing dirty sebum on the skin and excellent effects to remove excess cuticle on the skin and roughness from the skin surface. The agent gives unique feeling to the skin to form a smooth skin after cleaning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cleanser, and more particularly, it has an effect of removing sebum stains on the skin, and also an effect of removing excess keratin on the skin and making the skin surface rough. The present invention relates to a skin cleansing agent which is excellent and provides a unique feeling of use that makes the skin slippery after washing.

[0002]

2. Description of the Related Art Conventionally, a solid soap or a paste-like face-washing foam has been used for cleaning the skin. All of these have a surfactant as a main component, and have obtained a cleaning effect by solubilizing or dispersing dirt and excess sebum on the skin by the surface activity.
The action of these surfactants has a sufficient effect of removing excess sebum and the like, but the effect of removing excess keratin on the skin surface is very weak, and especially keratinization is promoted. There is little effect in removing excess keratin in the part that was removed. Those extra calluses
On the face, especially around the nose, the forehead, between the eyebrows, and the chin, it is felt as rough skin, which is unpleasant to the touch, lacks aesthetics, and has a poor foundation finish. Therefore, it is necessary to remove them.

On the other hand, packs and masks have been conventionally used for the purpose of removing these excess calluses.
Packs and masks are roughly classified into peel-off type (dry and peel-off type), wipe or wash-off type, and patch type. Among them, the peel-off type is mainly used to remove excess calluses. It is used, and this type has an excellent keratin-removing effect due to the adsorbing action of the film-forming agent contained therein. However, the peel-off type pack has the drawback of requiring a long treatment time (the time left after application), which makes it difficult to use in everyday busy life, and it also requires extra sebum and extra keratin. In order to remove all, it is necessary to wash with soap etc. and pack separately,
It lacked convenience.

[0004]

In addition to the above situation, in recent years, when quickness and simplicity of cosmetics are being demanded, it can be easily used and even with a single operation, excess sebum and dirt on the skin can be removed. There is a need for a skin cleanser that can remove excess calluses. For that purpose, for example, even if the amount of the surfactant to be added to the detergent is simply increased, the effect of removing extra keratin is hardly obtained, and the skin irritation becomes strong, which is not preferable for safety. , You can't get anything satisfactory. The present inventor has conducted extensive studies in order to solve such a problem, and as a result, a combination of an inorganic powder and an anionic surfactant to form a paste-like or liquid skin cleansing agent causes a problem of skin irritation. In addition to the effect of removing excess sebum and dirt, it is also excellent in removing excess keratin and roughening the skin, and a skin cleansing agent with a unique feeling of use that makes the skin smooth after washing can be obtained. The present invention has been completed and the present invention has been completed.

[0005]

According to the first aspect of the present invention,
Characteristic of containing an inorganic powder and an anionic surfactant, the content of the inorganic powder is 15 to 60%, and the content of the anionic surfactant is 0.1 to 40%, a paste form Alternatively, it is a liquid skin cleanser. According to a second aspect of the invention, the particle shape of the inorganic powder is tabular and the average particle size is 1
The skin cleansing agent according to claim 1, which has a thickness of 20 μm. The invention according to claim 3 is the skin cleansing agent according to claim 1 or 2, wherein the inorganic powder is kaolin. Claim 4
The described invention further comprises a humectant in an amount of 10 to 50%,
The skin cleansing agent according to claim 1. The invention according to claim 5 is the skin cleansing agent according to any one of claims 1 to 4, further containing 0.1 to 10% of a thickener.

The structure of the present invention will be described in detail below. Examples of the inorganic powder used in the present invention include talc, carion, mica, sericite, muscovite, phlogopite, synthetic mica, phlogopite, biotite, lithia mica,
Permiculite, magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate,
Tungstic acid metal salt, silica (anhydrous silicic acid), zeolite, barium sulfate, calcined calcium sulfate (calculated gypsum), calcium phosphate, calcium hydrogen phosphate, titanium dioxide, fluoroapatite, hydroxyapatite, ceramic powder, boron nitride, etc. . One or more of these inorganic powders can be arbitrarily selected and used. Among these inorganic powders, those having a flat particle shape and an average particle diameter of 1 to 20 μ are preferable, and as such an inorganic powder, talc,
Examples thereof include kaolin, mica, sericite, muscovite, phlogopite, and calcium hydrogen phosphate. Among them, particularly preferred inorganic powder is kaolin.

Examples of the anionic surfactant used in the present invention include a base for soap, fatty acid soap such as sodium laurate and sodium palmitate, higher alkyl sulfate ester salt such as sodium lauryl sulfate and sodium myristyl sulfate, Polyoxyethylene (hereinafter abbreviated as POE) lauryl sulfate triethanolamine, POE sodium lauryl sulfate and other alkyl ether sulfate ester salts, lauroyl sarcosine sodium, etc.
Higher fatty acid amide sulfonates such as N-acyl sarcosinic acid, N-myristoyl-N-methyl taurine sodium, coconut oil fatty acid methyl tauride sodium, lauryl methyl tauride sodium, POE oleyl ether phosphate sodium, POE stearyl ether phosphate Phosphate ester salts such as sodium di-2-ethylhexyl sulfosuccinate, monolauroyl monoethanolamide sodium polyoxyethylene sulfosuccinate, sulfosuccinates such as sodium lauryl polypropylene glycol sulfosuccinate, sodium linear dodecylbenzene sulfonate, linear dodecylbenzene Alkylbenzene sulfonates such as triethanolamine sulfonate, N-lauroyl glutamate monosodium, N-stearoyl glutamate disodium, N- N-acylglutamates such as monosodium ristoyl glutamate, hydrogenated coconut oil fatty acid glycerin sulfate, higher fatty acid ester sulfates such as sodium sulfate, sulfated oil such as funnel oil, POE alkyl ether carboxylic acid, POE alkyl allyl ether carboxylate , Α-olefin sulfonate, higher fatty acid ester sulfonate, secondary alcohol sulfate ester salt, higher fatty acid alkylolamide sulfate ester salt, lauroyl monoethanolamide sodium succinate, N-
Palmitoyl aspartate ditriethanolamine,
Examples include casein sodium and the like. One or two or more of these anionic surfactants can be arbitrarily selected and used.

Examples of the moisturizing agent used in the present invention include propylene glycol, dipropylene glycol, 1,3-butanediol, glycerin, sorbitol, maltitol, polyethylene glycol and polyoxyethylene methyl glucoside. One or more of these moisturizers can be arbitrarily selected and used.

Examples of the thickener used in the present invention include gum arabic, carrageenan, karaya gum,
Tragacanth gum, carob gum, quince seed (quince), casein, dextrin, gelatin, sodium pectate, sodium alginate, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, polyacrylic acid. Examples thereof include sodium, carboxyvinyl polymer, locust bean gum, guar gum, tamarind gum, dialkyldimethylammonium sulfate cellulose, xanthan gum, magnesium aluminum silicate, bentonite, and hectorite. One or more of these thickeners can be arbitrarily selected and used.

In the present invention, the blending amount of the inorganic powder is 15
The range is -60%. If the blending amount is 15% or less, sufficient skin roughness is not obtained, while 60%
If the blending amount exceeds 10, it will be difficult to formulate, and it will become a very hard paste or flake, so it will not spread well on the skin and it will not dissolve in water easily. Absent. In the present invention, the content of the anionic surfactant is in the range of 0.1 to 40%,
It is more preferably 1 to 20%. When the amount is less than 0.1%, sufficient cleaning effect for sebum and dirt cannot be obtained. On the other hand, when the amount is more than 40%, it is difficult to formulate, and it becomes a very hard paste or solid. Satisfactory results cannot be obtained in any case, such as a heavy spread on the surface, which is uncomfortable to use and is not preferable in terms of safety. In the skin cleansing agent according to claim 4 of the present invention, the blending amount of the moisturizing agent is 10 to 50%. If the blending amount is 10% or less, the appearance is not smooth. On the other hand, if the blending amount exceeds 50%, the amount of water is small, which may result in a very hard paste or solid. The feeling of use is not good, such as the heavy spread, and no favorable results are obtained in any case. The compounding ratio of the anionic surfactant and the moisturizer is preferably 1:30 to 2: 1 and the compounding ratio of the powder and the moisturizer is preferably 2: 5 to 6: 1. In the skin cleansing agent according to claim 5 of the present invention, the content of the thickener is 0.05 to 10%. If the blending amount is less than 0.05%, it is difficult to use because the viscosity is too low. On the other hand, if the blending amount is more than 10%, the viscosity is too high, the skin spreads heavily, and it is difficult to dissolve in water. Is poor, and no favorable result is obtained in any case.

In the skin cleansing agent according to the present invention, in addition to the above-mentioned essential constituents, if necessary, components generally used in cleansing agents, cosmetics and the like can be added. Liquid paraffin, higher alcohols,
Ester oil, oil such as methylpolysiloxane, amphoteric surfactant such as N-alkyl-N, N-dimethylaminoacetic acid betaine, nonionic surfactant, preservative, bactericide, UV absorber, chelating agent, oxidation Examples include inhibitors and fragrances.

[0012]

The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. Prior to the examples, the evaluation method used in each example will be described.

[Sebum-cleansing effect test method] The sebum-cleansing test was carried out by using the forehead of five healthy panelists and using naturally secreted sebum at the time 2 hours after washing the face. Prior to washing with the test sample, a glass cup having a diameter of 2 cm was placed on the right side of the forehead, and acetone-diethyl ether (1:
1) 2 ml of the mixed solvent was added, and sebum was extracted for 5 minutes. Then, with 2 g of the test sample and tap water at about 37 ° C., the entire face was washed in the same manner as when washing the face with ordinary soap or a face-wash foam, and the water was removed and dried. After that, sebum was extracted from the left side of the forehead by the same method as before washing the face. After removing the solvent under reduced pressure, the extracted sebum was subjected to trimethylsilylation treatment, and the sebum component was quantified by gas chromatography. As the sebum component, the total amount of squalene, triglyceride, free fatty acid, and wax ester was taken as the sebum extraction amount. Cleaning efficiency (%) based on the amount of sebum extracted before washing and the amount of sebum extracted after washing
I asked. A0: Amount of sebum extracted before washing A1: Evaluation of amount of sebum after washing ○: Good sebum cleaning power Cleaning efficiency 90% or more △: Normal sebum cleaning power 60% or more ×: Poor sebum cleaning power Cleaning efficiency less than 60%

[Examination of dead skin cells] The amount of old dead skin cells on the skin surface was photographed by enlarging the skin surface 100 times with a video microscope equipped with a fiber light source, and inputting the image to an image processing device. The area ratio of the portion of the stratum corneum where scaling has occurred (the portion that shines white) was determined in% by binarization processing, and was used as the amount of old stratum corneum. The exfoliating effect test was carried out using the forehead of 5 healthy panelists. Prior to washing with the test sample, the old angular mass of the skin surface was measured. After that, the entire face was washed with 2 g of the test sample and tap water at about 37 ° C. in the same manner as when washing the face with ordinary soap or face wash foam. Then, the old angular mass after washing was measured at the same site. The exfoliation rate (%) was determined from the old horn mass before washing and the old horn mass after washing. A0: Old horn mass before washing A1: Old horn mass after washing ◯: Exfoliating power is good, exfoliation rate 60% or more △: Exfoliation power is normal, Exfoliation rate is 30% or more ×: Exfoliation power is poor Exfoliation rate Less than 30%

[Sensory Evaluation Test] In the sensory evaluation, a panel of 5 healthy females was used to wash the face with the test sample, and the difference in the feel of the skin before and after the face washing was scored as follows. Was evaluated as. Score 2: The skin was not rough, and the skin had a smooth feel. 1: The skin was slightly rough. 0: Roughness of the skin does not disappear. Evaluation: Average score of 1.0 or higher Δ: Average score of 0.5 or higher ×: Average score of less than 0.5

[Evaluation of Appearance State] The appearance state was evaluated as follows from the viewpoint of ease of use as a skin cleanser. ○: Liquid or smooth paste form △: Very hard paste or solid form ×: Flake form or powder form

Examples 1 to 12 and Comparative Examples 1 to 4 A cleaning agent having the composition shown in the following Tables 1 and 2 was prepared, and its appearance was evaluated, sebum cleaning effect test, and exfoliation effect test. A sensory evaluation test was conducted.

[0018]

[Table 1]

[0019]

[Table 2]

As is clear from Tables 1 and 2, the skin cleanser of the present invention is excellent in the effect of removing sebum and at the same time the effect of removing old keratin. In Table 1, when the content of the inorganic powder is less than 15% (Comparative Example 1), the keratin-removing effect is not sufficient, and when it exceeds 60% (Comparative Example 2), the appearance is poor and it is used as a skin cleanser. Not in an easy state. In Table 2, when the content of the anionic surfactant is less than 0.1% (Comparative Example 3), neither the sebum cleaning effect nor the keratin removing effect is sufficient, and 40
If it exceeds% (Comparative Example 4), the appearance is not good and satisfactory results cannot be obtained.

A skin cleansing agent having the following formulation was prepared using powders of the types shown in Table 3, and a sebum cleansing effect test, a callus removal effect test, and a sensory evaluation test were conducted. The results are shown in Table 3. Examples 13 to 23 and Comparative Examples 5 to 7 (1) 40% by weight of powder of the type described in Table 3 (2) N-coconut fatty acid-N-methyl taurine sodium (30% aqueous solution) 15 (3) Glycerin 30 ( 4) 1,3-Butanediol 10 (5) Carboxymethylcellulose 1 (6) Ion-exchanged water 4

[0022]

[Table 3]

In Table 3, when the powder is an organic powder (Comparative Examples 5 to 7), satisfactory results are not obtained. Among the inorganic powders, the particle shape is flat and the average particle diameter is 1
Those having a thickness of -20 μm are particularly preferable.

Example 24 (1) Bentonite 4% by weight (2) 1,3-butanediol 10 (3) Glycerin 21 (4) Purified water 10 (5) Kaolin 40 (6) N-coconut fatty acid-N-methyl Sodium taurine (30% aqueous solution) 15 (7) Fragrance Suitable amount

The production method (1) is dispersed in (2), (3) and (4), (5) is mixed and stirred, and then (6),
(7) was mixed to obtain a paste-like cleaning material. The results of the evaluation were “good” for both the sebum cleaning effect and the keratin removing effect.

Example 25 (1) Hydroxyethyl cellulose 0.3% by weight (2) 1,3-butanediol 10 (3) Sorbitol liquid (70%) 22.7 (4) Purified water 10 (5) Talc 25 (6) Kaolin 15 (6) Calcium carbonate 10 (6) N-stearoyl glutamate disodium 4 (7) Perfume proper amount

Manufacturing method According to Example 24. The results of the evaluation were “good” for both the sebum cleaning effect and the keratin removing effect.

Example 26 (1) Stearic acid 5% by weight (2) Palmitic acid 5 (3) Myristic acid 6 (4) Lauric acid 2 (5) Coconut oil 1 (6) Potassium hydroxide 3 (7) Polyethylene glycol 1500 5 (8) Glycerin 7 (9) Glycerol monostearate 1 (10) Polyoxyethylene (20) Sorbitan monostearate 1 (11) Mica (muscovite) 20 (12) Kaolin 20 (13) Sodium alginate 0.05 (14) Purified water 24 (15) Perfume Suitable amount

The production methods (1), (2), (3), (4) and (5) are dissolved by heating at 70 ° C. and (6) is partially dissolved in (14) and neutralized. (7), (8) and (9) are melted by heating and added and mixed, and then (11), (12), (13) and (14) are mixed and added. After adding (15), the mixture was stirred and mixed under reduced pressure at 70 ° C., and cooled to 25 ° C. through a heat exchange device. The obtained paste-like cleansing agent was evaluated as ◯ for both sebum cleaning effect and keratin removing effect.

[0030]

EFFECTS OF THE INVENTION The skin cleansing agent according to the present invention has an excellent effect of removing sebum stains on the skin surface, and at the same time, has an excellent effect of removing old keratin on the skin surface and removing roughness of the skin. It is possible to obtain a smooth and unique feeling.

Claims (5)

[Claims] 1. A paste-like or liquid skin cleansing agent containing 15 to 60% of inorganic powder and 0.1 to 40% of anionic surfactant. 2. The skin cleansing agent according to claim 1, wherein the inorganic powder has a flat particle shape and an average particle diameter of 1 to 20 μm.
A skin cleanser that is. 3. The skin cleansing agent according to claim 1 or 2, wherein the inorganic powder is kaolin. 4. A skin cleansing composition according to any one of claims 1 to 3, further containing 10 to 50% of a moisturizer. 5. The skin cleansing composition according to any one of claims 1 to 4, further comprising a thickener in an amount of 0.05 to 10%.