JPS63179817A - Aqueous cleansing agent - Google Patents

Abstract

PURPOSE:To obtain an aqueous cleansing agent having good feeling in use, high cleansing effects, excellent stability with time and skin safety, containing a specific nonionic surface active agent and cetostearyl alcohol. CONSTITUTION:An aqueous cleansing agent containing (A) 0.1-10wt.% nonionic surface active agent having >=12 HLB value, such as polyoxyethylene sorbitan fatty acid ester, sucrose fatty acid ester or polyoxyethylene alkyl ether and (B) 0.1-10wt.% cetostearyl alcohol, a mixture of higher aliphatic alcohols, such as a mixture of cetyl alcohol and stearyl alcohol in a ratio of 4:1-1:4. Further the agent may be optionally mixed with water-soluble components such as water-soluble high polymer, humectant, alcohol, antiseptic, and a very small amount of perfume, dyestuff, etc.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a new aqueous cleansing agent, which aims to provide a novel aqueous cleansing agent that is pleasant to use, has a high cleansing effect, and is stable over time and skin safe. The purpose is to provide a good aqueous cleansing agent.

[Prior Art] Conventionally, cleansing agents for removing makeup come in cream, emulsion, and liquid forms, and are categorized into emulsion types, oil-based types, and water-based types. There are several types, each of which is used to take advantage of its characteristics.

In general, aqueous cleansing agents have a cleansing effect mainly by blending detergent surfactants, and they can be easily washed off with water, can be wiped off, and are not sticky after use. It is characterized by a light and good feeling of use.

[Problems to be Solved by the Invention] However, although conventional water-based cleansing agents are easy to use and have a pleasant feeling when used as described above, they are difficult to remove oil-based stains and are insufficiently effective in this respect. there were.

Therefore, in order to enhance the cleansing effect, various studies have been conducted on surfactants with high detergency, and efforts have been made to use relatively large amounts of surfactants. However, even in such cases, nothing that satisfactorily meets expectations in terms of cleansing function and skin safety has not been obtained, and in particular, as interest in skin safety has been increasing in recent years, surfactant There are limits to expecting cleansing effects from agents alone.

Under these circumstances, the reality is that not many aqueous cleansing agents have been commercialized.

[Means for Solving the Problems] In view of the above points, the present inventors have developed an aqueous cleansing agent that is comfortable to use, has a good cleansing effect, and has good stability over time and good skin safety. As a result of intensive research, we discovered that the functionality of conventional aqueous cleansing agents can be further improved by using a hydrophilic nonionic surfactant and cetostearyl alcohol, a type of higher alcohol. The present invention has been completed.

That is, the present invention relates to an aqueous cleansing agent characterized by containing a nonionic surfactant having an HLB value of 12 or more and cetostearyl alcohol as essential ingredients.

The nonionic surfactant having an HLB value of 12 or more used in the present invention may be one that can be used in the cosmetics field, and can be suitably used as long as it is highly safe for the human body. For example, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene phytosterol, polyoxyethylene polyoxypropylene Alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene lanolin derivative, polyoxyethylene alkylamine, polyoxyethylene fatty acid amide, monopyroglutamic acid monoisostearin buty polyoxyethylene Glycerin, monopyroglutamic acid monoisostearic acid polyoxyethylene hydrogenated castor oil, etc. with an HLB value of 12 or higher.”
− can be mentioned.

In addition, the amount used is not particularly limited, but
If used in the range of 0.1 to 10% by weight, it is a sufficient amount for the present invention and is practically preferable.

That is, within the above range, the object of the present invention can be effectively achieved.

Furthermore, cetyl alcohol and stearyl alcohol, which is essential in the aqueous cleansing agent of the present invention, is a mixture of higher aliphatic alcohols, and generally has a ratio of cetyl alcohol and stearyl alcohol of 4:1 to 1:4. are known and can be suitably used. The amount of cetostearyl alcohol blended in the present invention is not particularly limited, but is preferably 0.1 to 10% by weight.

If it is less than 0.1% by weight, it will not be possible to obtain a good cleansing effect, and if it is used in excess of 10% by weight, the washability will be poor and the oiliness will increase, resulting in a poor feeling of use. Since it becomes difficult to maintain stability, the above range is sufficient for the present invention.

In addition to the above-mentioned essential components, the aqueous cleansing agent of the present invention may contain water-soluble components such as water-soluble polymers, humectants, alcohol, preservatives, and trace amounts of fragrances, pigments, etc., as necessary. In particular, it is preferable to incorporate a water-soluble polymer thickener because it can impart viscosity to the product and improve its stability, thereby broadening the range of applications. Examples of such water-soluble polymers include salts of methylcellulose, ethylcellulose, carboxymethylcellulose-oxyethylcellulose, hydroxypropylcellulose, and carboxyvinyl polymer.

The aqueous cleansing agent of the present invention is composed of the above-mentioned components, has a transparent to translucent appearance, is used as a lotion-like to gel-like product, and is washable with water. It can be used not only as a cleansing agent, but also as a wipe-off type cleansing agent.

[Example] Next, the present invention will be further described with reference to Examples. These do not limit the present invention in any way.

Examples [1], [2] First, aqueous cleansing agents of Examples [1], [2] and Comparative Examples [1] to [4] whose formulations are shown in Table 1 were prepared, and the cleansing effect, feeling of use, The effect on stability over time was investigated. The results are shown in Table 1.

In addition, in the table, the compounding amount is shown in weight%, and it was manufactured according to a conventional method.

(Leaving space below) Table 1 Among the evaluation items, the evaluation of cleansing effect and feeling of use was conducted through a use test on a panel of 20 women. Using the aqueous cleansing agent in the example, the cleansing effect, the refreshing feeling during and after use, and the lack of stickiness were compared. Each panel scored 3 points for each evaluation item, 3 points for ``very good'', and 3 points for ``very good''.
``Good'' or ``Average'' was scored as 2 points, and ``Bad'' as 1 point. Δ, less than 1.5 points were expressed as ×. In addition, stability evaluation over time was performed by storing the product at 40°C or 5°C for 1 month and visually observing changes in the state such as cleaning, separation, gelation, and putty formation.
0 indicates "stable without change", Δ indicates "change", and "x" indicates "significant change".

As is clear from the results in Table 1, Example [1] according to the present invention
The aqueous cleansing agent of 1 and [2] had an excellent feeling of use with a light feeling and no stickiness, had a good cleansing effect, and was stable with no change in condition over time. . On the other hand, when cetostearyl alcohol is not contained (Comparative Example [1]), the cleansing effect is inferior, and when the content is high (Comparative Example [1]), the cleansing effect is poor.
2]) became oily and had a poor feeling of use, and separation of oil components over time was also observed. On the other hand, when cetyl alcohol and stearyl alcohol were added alone instead of cetostearyl alcohol (Comparative Example [3], [
4]) did not show much improvement in cleansing effect,
Moreover, when stored at 5°C, it became a hard gel-like substance, and lacked usability.

That is, the aqueous cleansing agents of Examples [1] and [2] according to the present invention had good effects in terms of cleansing effect, feeling of use, and stability over time. Further, the aqueous cleansing agent of the above example was satisfactory from the viewpoint of skin safety.

Example [3] (Formulation) (% by weight) (1) Monoisostearic acid poly 5.0 oxyethylene hydrogenated castor oil (50E, 0.) (HLB value 12) (2) Sucrose monolauric acid ester 3.0 l (HLB value 18) (3) Cetostearyl alcohol 1.0 (4
) Propylene glycol 10.0 (5)
Ethanol 10.0 (6)
Methyl cellulose 0.15 ('7) Purified water Remaining amount (manufacturing method) A (5) ~ (Heat and dissolve at 60°C.

B(1) to (4) are heated and dissolved.

Add B to CA and mix by stirring.

D. Cool to make a product.

The aqueous cleansing agent of Example [31] obtained as described above is a lotion-like product that is transparent and has an appropriate viscosity, and has a good feeling of use and an excellent cleansing effect. there were.

Example L4] (Formulation) (Weight%) (1)
Polyoxyethylene polyoxy 2.0 dipropylene cetyl ether (20E, 0..8P, 0.) (HLB value 12.5) (
2) Sucrose monolaurate ester 2.0 l (H
LB value 18) (3) Cetostearyl alcohol 5.0 (
Methyl 4-paraoxybenzoate 0.2(5) Glycerin 5.0(()) Dipropylene glycol 5.0('7) Purified water
Remaining amount (manufacturing method) A Heat and dissolve (1) to (6) at 60°C.

B (heat to 60'C and add to A, stir and mix.

C. Cool to produce a product.

The aqueous cleansing composition of Example [41] obtained as described above was in the form of a translucent lotion, had a good feeling of use, and had an excellent cleansing effect.

[Effects of the Invention] As described in detail below, the present invention improves the HLB value! By using two or more nonionic surfactants and cetostearyl alcohol in combination as essential ingredients, an aqueous cleansing needle that is comfortable to use and has an excellent cleansing effect can be obtained.

In other words, despite being an aqueous type, the present invention not only has a better cleansing effect than conventional ones, but also has a non-sticky, light and good feeling of use, and is stable over time and safe for the skin. It has now become possible to provide an extremely useful aqueous cleansing agent that is also good in terms of properties.

that's all

Claims (1)

[Claims] (1) An aqueous cleansing agent characterized by containing a nonionic surfactant with an HLB value of 12 or more and cetostearyl alcohol as essential ingredients.