JPH0725726A - Skin cleansing agent - Google Patents

Abstract

PURPOSE:To obtain a skin cleansing agent having high refreshing feeling in cleansing and further enhanced in cleansing effects by improving foaming property. CONSTITUTION:This skin cleansing agent is characterized by at least including 15-30wt.% of an anionic surfactant and an amphoteric surfactant, 30-60wt.% of oil and water. The agent is characterized by further containing at least one kind of compound among 1,3-butylene glycol, propylene glycol and polyethylene glycol and 0.01-5wt.% of a liquid fatty acid.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a skin cleanser,
In particular, it relates to a cleaning agent such as foundation and lipstick.

[0002]

2. Description of the Related Art As a method for effectively removing a foundation, conventionally, a method has been generally used in which oily components such as oily cleansing cream and oil are soaked in the foundation and well wiped off, and then washed off with soap or cleansing foam. Was used. But,
Since these methods use an oily component, they have a sticky feeling and have problems such as damaging the stratum corneum during wiping. Furthermore, it is troublesome because it requires two steps of removing the foundation with an oily component and further washing with soap or the like.

As a method for solving these problems, a cleaning agent for a liquid crystal structure is disclosed in Japanese Patent Publication No. 1-52845. After applying this cleansing agent to the skin and making it familiar,
Although it has the feature that it can remove foundations and stains only by washing with water, it has a problem that it does not feel refreshed during washing because of low foaming at the time of use, and the usability is low.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, the present invention improves foaming and provides a high refreshing feeling during washing,
Moreover, it is an object of the present invention to provide a skin cleansing agent having a further improved cleaning effect.

[0005]

The skin cleansing agent of the present invention comprises:
It is characterized by containing at least 15 to 30% by weight of an anionic surfactant and amphoteric surfactant, 30 to 60% by weight of oil, and water. Particularly preferred is a mixture of at least one of 1,3-butylene glycol, propylene glycol and polyethylene glycol, and a liquid fatty acid.

[0006]

Actions and Embodiments The skin cleansing agent of the present invention is prepared by dispersing oil in a mixed aqueous solution of an anionic surfactant and an amphoteric surfactant, and mixing the surfactant in the cleansing agent in an amount of 5 to 3
It is obtained by adjusting the amount of oil to 0% and the amount of oil to 30 to 60%, which makes it possible to obtain a skin cleansing agent which is excellent in feeling of use during skin cleansing, refreshing feeling after cleansing, and cleansing power. That is,
In addition to the good "feel" of the cleaning agent on the skin, it has a high feeling of use.
Since the foaming is extremely excellent, the refreshing feeling during cleaning is greatly improved.

Since the skin cleansing agent of the present invention contains an anionic surfactant and an amphoteric surfactant, the stability of the emulsion, particularly at high temperature, is significantly improved, and it is Also in this case, the properties of the skin cleanser can be maintained for a long period of time.

Further, the skin cleansing agent of the present invention is an o / w type, and has a non-greasy feeling and a refreshingly high feeling of use even though oil is blended at a high concentration.

In the present invention, it is preferable to add a liquid fatty acid, which further improves the detergency of the detergent. In addition, by blending at least one of 1,3-butylene glycol, propylene glycol and polyethylene glycol, the "spreading" of the detergent on the skin can be further improved.

Next, the components of the invention will be described in detail.

The anionic surfactants and amphoteric surfactants of the present invention are used in ordinary cosmetic bases and the like, and any one or two or more of them are selected and used. .

Examples of the anionic surfactant include a base for soap, a fatty acid soap such as sodium laurate and sodium palmitate; a higher alkyl sulfate ester salt such as sodium lauryl sulfate and potassium lauryl sulfate; POE lauryl triethanolamine sulfate. PO
E Alkyl ether sulfate salts such as sodium lauryl sulfate, N-acyl sarcosinic acid such as sodium lauroyl sarcosine, N-myristoyl-N-methyl taurine sodium, higher fatty acid amides such as coconut oil fatty acid methyl tauride sodium and sodium lauryl methyl tauride Sulfonate: POE oleyl ether phosphate sodium, POE stearyl ether phosphate, etc. phosphate salt; Di-2-ethylhexyl sodium sulfosuccinate, monolauroyl monoethanolamide sodium polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate And other sulfosuccinates; sodium linear dodecylbenzene sulfonate, triethanolamine linear dodecylbenzene sulfonate Alkylbenzenesulfonates such as linear dodecylbenzenesulfonic acid; N-acylglutamates such as N-lauroylglutamate monosodium, N-stearoylglutamate disodium, N-myristoyl-L-glutamate monosodium; hydrogenated coconut oil fatty acid glycerin sodium sulfate, etc. Higher fatty acid ester sulfate ester salt; sulfated oil such as funnel oil; PO
E alkyl ether carboxylic acid; POE alkyl allyl ether carboxylate; α-olefin sulfonate;
Higher fatty acid ester sulfonate; secondary Delcol sulfate ester salt; higher fatty acid alkylolamide sulfate ester salt; lauroyl monoethanolamide sodium succinate; N-palmitoyl aspartate ditriethanolamine; sodium caseinate and the like. As a commercially available product, for example, Eyescope DAM-S (manufactured by Toho Kagaku) is preferably used.

Specific examples of the amphoteric surfactant include, for example, an amidobetaine type amphoteric surfactant represented by the formula (1) (commercially available products are Levon 2000 (manufactured by Sanyo Kasei), Anon BDF (manufactured by NOF Corporation). Etc.), Amidosulfobetaine-type amphoteric surfactant represented by the formula (2) (commercially available products include Lonzain CS (manufactured by Lonza) and Miratain CBS (manufactured by Milanol)), A betaine-type amphoteric surfactant represented by the formula (3) (commercially available products are Anon BL (manufactured by NOF Corporation), Dehainton A)
B-30 (made by Henkel), etc.), Sulfobetaine-type amphoteric surfactant represented by formula (4) (commercially available products include Lonzain 12CS (manufactured by Lonza)), Imidazolinium-type amphoteric surfactant represented by the formula (5) (commercially available products include Obazoline 662N (manufactured by Toho Kagaku) and Anon GLM (manufactured by NOF Corporation)) Etc. In formulas (1) to (5), R ₁ is
An alkyl group or an alkenyl group is preferable, and its carbon number is preferably 9 to 21. More preferable carbon number is 11
To 17, and most preferably 11 to 13. R ₂
Is an alkyl group or an alkenyl group having 10 to 18 carbon atoms. Further, x is an integer of 2 to 4, y is an integer of 0 to 3, and z is 1 or 2.

The compounding amount of the anionic surfactant and the amphoteric surfactant is 15 to 30% by weight based on the total amount of the cosmetic. When it is 15% or more, the foaming is high and the refreshing feeling during washing is excellent, and the high detergency is obtained. If it exceeds 30%, the viscosity becomes very large, the handleability in production is deteriorated, and the "spread" on the skin is deteriorated, and the usability is deteriorated. Further, the amount of the anionic surfactant blended is preferably 5% or more, and when it is 5% or more, foaming is further improved, and a refreshing feeling during cleaning and cleaning power are further improved. In general, an ionic surfactant may show skin irritation, but since it contains an amphoteric surfactant, irritation can be suppressed. Particularly, the compounding ratio of the anionic surfactant to the amphoteric surfactant is 1
The following are preferred. Within this range, irritation is further suppressed and foaming is also improved.

The oil used in the skin cleansing agent of the present invention is widely applied from polar oils to nonpolar oils. For example, hydrocarbons such as liquid paraffin, branched light paraffin, paraffin wax, cesylene and squalane; beeswax. , Whale wax, carnauba wax and other waxes; olive oil, camellia oil,
Natural animal and vegetable oils such as jojoba oil and lanolin; ester oils such as isopropyl myristate, cetyl-2-ethylhexanoate, cetyl isooctanoate, glycerin trioctanoate; decamethylpentasiloxane, dimethylpolysiloxane, methylphenyl Silicone oils such as polysiloxane; higher alcohols such as cetyl alcohol, stearyl alcohol, oleyl alcohol and the like can be mentioned, and these may be used alone or in combination of two or more kinds. Further, it may be dissolved in a solvent before use. In addition, the stability of the emulsion is further improved by using a non-polar oil.

The amount of oil blended is 30 to 6 in the total amount of the skin cleanser.
It is 0% by weight. A stable emulsion is obtained at 30% or more,
A skin cleansing agent having a high foaming property can be obtained at 60% or less.

The liquid fatty acid added to the detergent of the present invention is a fatty acid having 6 to 18 carbon atoms and liquid at room temperature. Specific examples thereof include n-heptanoic acid, 2-ethylheptanoic acid, pelargonic acid, caprylic acid, isostearic acid, oleic acid, linoleic acid, and linolenic acid.
Of these, particularly preferred representative examples include isostearic acid, oleic acid, and linolenic acid. As commercially available products, iserystearic acid (Emery # 871, # 87
5) is preferably used.

The amount of the fatty acid compounded is preferably 0.01 to 5% by weight. If it is 0.01% or more, the cleaning power is further improved, and the refreshing feeling during and after cleaning is also improved. On the other hand, if it exceeds 5%, stickiness may be felt, and it is preferably 5% or less.

The skin cleansing agent of the present invention preferably contains a moisturizer used in cosmetics. In addition to the original moisturizing effect, the moisturizing agent reduces the viscosity of the anionic surfactant when the concentration of the anionic surfactant is high, facilitates preparation, and gives a pleasant after-feeling to the skin to increase the effect of the present invention. Let As such a moisturizing agent, for example, glycerin, diglycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, polyethylene glycol, polyoxypropylene (9) diglyceryl ether, etc. are preferably used, and these are used as an interface. The solubility of the active agent is increased and the formulation becomes easier. In particular, when 1,3-butylene glycol, propylene glycol, or polyethylene glycol is blended, not only the ease of preparation but also the "spreading" of the skin cleansing agent is improved and the usability is improved.

In addition to the above-mentioned components, the cleaning composition of the present invention may optionally contain other components generally used in cosmetics.

[0021]

EXAMPLES The present invention will be described in more detail with reference to the following examples.

First, a method of evaluating the effect of the present invention will be described.

1) "Noby" 15 female panelists applied 5 g of the sample directly to the face and evaluated the "noby" when they were accustomed to stains. The evaluation is carried out on a 4-point scale, and if it is extremely good, ◎,
If it was good, it was evaluated as ◯, if it was normal, it was evaluated as Δ, and if it was poor, it was evaluated as x.

2) Refreshing Feeling During Washing 15 female panelists applied 5 g of the sample directly to the face to make the stains fit, and then the refreshing feel when washed off with water was evaluated by sensory evaluation. The evaluation is a four-level evaluation,
Remarkably good, ⊚, good, good, fair, poor, bad.

3) Refreshing sensation after washing 15 female panelists evaluated sensoryly the refreshing sensation immediately after 5 g of the sample was directly applied to the face to make it smear with the stain and washing with water. The evaluation was carried out by a four-stage evaluation, and marked with "Excellent", "Good", "Good", "Fair", and "Poor" with "Poor".

4) Detergency 5 samples of 5 g were directly applied to the face of 15 female panels made up with the same foundation and washed with water.
The lotion was wiped off with cotton and the degree of transfer of the foundation to cotton was visually evaluated. The evaluation was carried out by a four-stage evaluation, and marked with "Excellent", "Good", "Good", "Fair", and "Poor" with "Poor".

5) Stability The prepared sample was allowed to stand at 50 ° C. for 1 month, and then the size of the emulsified particles was examined by a microscope.

⊚: No coalescence of particles occurred at all ○: Minor coalescence of particles occurred at least Δ: Conspicuous coalescence of particles ×: Coalescence of particles 6) Foaming power test Add 5% of the sample and 0.1% of commercially available foundation to 70 ppm artificial hard water to prepare 400 ml of a mixed solution under the condition of 40 ° C. The amount of foaming was measured using a cylindrical cylinder equipped with a stirrer. The evaluation was based on the following criteria.

∘: Very good foaming: foam amount 2000
ml or more ○: Good foaming: foam amount 1500 or more and less than 2000 ml △ ... foaming normal: foam amount 1000 or more and less than 1500 ml × ... poor foaming: foam amount less than 1000 ml (Examples 1 to 5 and Comparative Examples 1 to 1) 3) Washing creams for makeup cosmetics having various compositions shown in Table 1 were prepared, and each evaluation was performed according to the above-mentioned evaluation method. The results are shown in Table 2.

[0030]

[Table 1]

[0031]

[Table 2] As shown in Table 2, the cleaning creams of Examples 1 to 5 exhibit high characteristics in any evaluation, and the skin cleansing agent of the present invention has a high feeling of use, excellent cleaning power, and highly stable cleaning. It turns out that it is a fee.

In particular, as shown in Examples 3 and 4, it was found that polyethylene glycol or 1,3-butylene glycol was added, the "spread" of the cleaning cream was further improved, and the feeling of use was further improved. It was Furthermore, Example 5 containing isostearic acid exhibited extremely high detergency. In addition, as in Examples 2, 4, and 5, in which the nonpolar oil was used as the oil, the stability of the emulsion was further improved.

On the other hand, although not shown in the table, a similar evaluation was conducted on the cleaning cream prepared by changing the ratio of the anionic surfactant and the amphoteric surfactant. When the activator (weight ratio) was 1 or less, the foaming slightly decreased, but the performance was higher than that of the comparative example.

(Examples 6 and 7) Next, the makeup cleansing creams shown in Table 3 were prepared and evaluated in the same manner as in Example 1. The results are shown in Table 4.

[0035]

[Table 3]

[0036]

[Table 4] As shown in Table 4, the cleaning cream is composed of anionic surfactant, amphoteric surfactant and water, and further addition of liquid fatty acid and polyethylene glycol (or propylene glycol) reduces other properties. It was possible to further improve the "spreading" and the detergency of the cleaning cream without any use, and it was possible to obtain a cleaning cream having extremely high properties.

[0037]

As described above, according to the first aspect of the present invention, since foaming is high, the refreshing feeling is excellent and the cleaning power is excellent.
A highly stable skin cleansing agent can be provided.

Further, according to the invention of claim 2, a skin cleansing agent having further improved spreadability and feeling of use is obtained, and according to the invention of claim 3, there is provided a skin cleansing agent having further improved detergency. Is possible.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Michihiro Yamaguchi 1050 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa Shiseido Daiichi Research Center

Claims (3)

[Claims] 1. A skin cleanser containing at least 15 to 30% by weight of an anionic surfactant and amphoteric surfactant, 30 to 60% by weight of oil, and at least water. 2. The skin cleansing agent according to claim 1, which contains at least one of 1,3-butylene glycol, propylene glycol and polyethylene glycol. 3. The skin cleansing agent according to claim 1, which contains 0.01 to 5% by weight of a liquid fatty acid.