JPH0840827A - Gel cleansing agent - Google Patents

Abstract

PURPOSE:To obtain a gel cleansing agent which has excellent cleansing effect for make-up cosmetics of high adhesion with good washing-off properties and gives good application feeling because of its high spreadability and fitness to the skin without clamminess after washing off. CONSTITUTION:This cleansing agent comprises (A) 0.1-10wt.% of a nonionic surfactant of the formula (R is a 8-36C straight or branched alkyl or alkenyl; X is 1-60; Y is 3-60), (B) 0.1-8wt.% of a higher fatty acid salt such as sodium oleate, triethanolammonium stearate, (C) 30-90wt.% of oil such as squalane or fluid paraffin, (D) 5-20wt.% of a tri- or more polyhydric alcohol such as glycerol or pentaerythritol and (E) 0.5-30wt.% of water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gel cleansing agent, and more particularly to a gel cleansing agent having excellent cleansing power, wash-off property and good feeling after use.

[0002]

2. Description of the Related Art Conventionally, cleaning agents have been provided for the purpose of removing dirt, removing makeup and the like. Examples of such a cleaning agent include toilet soap, facial cleansing cream, liquid soap, etc., but in recent years, a gel type cleansing agent with a higher cleaning power has been newly developed and has gained good support from consumers. There is.

[0003]

However, as a result of the development of cosmetics having a high adhesion to the skin, which contains a methacrylic acid-based polymer or a fluorine-based polymer, the gel-type cleansing agent has a function of removing makeup. It ’s not enough.

Further, gel cleansing agents containing a thickening agent have drawbacks such as a slimy feel after wash-off, giving the user great discomfort, and having insufficient wash-off property. Have

The present invention has been made in view of the above circumstances and is excellent in cleansing power, has good wash-off property, spreads well on the skin during use, is well-known and does not become slimy after wash-off. An object is to provide a gel cleansing agent having a good feeling.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor used a specific nonionic surfactant having extremely high hydrophilicity, in combination with a higher fatty acid salt. Furthermore, when a gel composition containing oil, a polyhydric alcohol having a valence of 3 or more, and water is used, the cleansing power is excellent, the wash-off property, the elongation during use, the familiarity are good, and the feeling after use is good. The present invention has been completed by discovering that an excellent gel cleansing agent can be obtained.

That is, the present invention comprises (a) 0.1 to 10% by weight of a nonionic surfactant represented by the following general formula (1), (b) 0.1 to 8% by weight of a higher fatty acid salt, (c) ) Oil content 30 to 90% by weight (d) Trihydric or higher polyhydric alcohol 5
Provided is a gel cleansing agent containing 20% by weight (e) of 0.5 to 30% by weight of water.

The present invention will be described in detail below.

The specific nonionic surfactant used in the present invention is represented by the following general formula (1).

[0010]

Embedded image RO (C ₄ H ₈ O) _x (C ₃ H ₅ (OH) O) _Y H (1) (wherein R is a linear or branched alkyl group having 8 to 36 carbon atoms) Represents a group or an alkenyl group, X represents an integer of 1 to 60, and Y represents an integer of 3 to 60.)

If the carbon number of R in the general formula (1) is less than 8, a good gel cannot be formed, and if it is more than 36, the hydrophilicity decreases and the wash-off property deteriorates. When X is 0, the hydrophilicity of the polyglycerin group is too strong and the function as an activator is extremely reduced. On the other hand, when X is larger than 60, hydrophilicity is lowered. When Y is less than 3, hydrophilicity is not sufficient, and when Y is more than 60, a good gel cannot be formed.

The blending amount of the nonionic surfactant of the general formula (1) is preferably 0.1 to 10% by weight. 0.1% by weight
If the amount is smaller, it is not possible to sufficiently remove the highly adherent cosmetics. Further, even if the amount is more than 10% by weight, the improvement in detergency is slight.

As the higher fatty acid salt, higher fatty acid alkali metal salt, higher fatty acid ethanolamine salt and the like can be used, and specifically, sodium laurate, potassium laurate, diethanolamine laurate, triethanolamine laurate, olein can be used. Sodium acid salt, potassium oleate, diethanolamine oleate, triethanolamine oleate, sodium myristate, potassium myristate, diethanolamine myristate, triethanolamine myristate, sodium stearate, potassium stearate, diethanolamine stearate, tristearate stearate Ethanolamine,
Sodium 12-hydroxystearate, potassium 12-hydroxystearate, diethanolamine 12-hydroxystearate, triethanolamine 12-hydroxystearate, sodium behenate, potassium behenate, diethanolamine behenate, triethanolamine behenate and the like can be mentioned. And one or more of these are used.

The blending amount of the higher fatty acid salt is 0.1-8.
% By weight is preferred. If it is less than 0.1% by weight, the improvement of the detergency will be insufficient. On the other hand, if it exceeds 8% by weight, the stability of the emulsion is deteriorated, which is not preferable.

The oil may be any of those normally used in cosmetics, including squalane, liquid paraffin, petrolatum, olive oil, glycerol tris-2-ethylhexanoate, mink oil, isopropyl myristate, myristyl myristate, octyl oleate. Dodecanol,
Examples include jojoba oil, beeswax, lanolin, methyl polysiloxane, and methylphenyl polysiloxane.

The blending amount of oil is preferably in the range of 30 to 90% by weight. If it is less than 30% by weight, the cleansing power is poor, and if it exceeds 90% by weight, the stability of the gel over time becomes unstable, which is not preferable.

Examples of the trihydric or higher polyhydric alcohol include glycerin, diglycerin, triglycerin, polyglycerin, trismethylolpropane, pentaerythritol, sorbitan, sorbitol, glucose, sucrose, mannitol, maltitol and trehalose. , One or more of these are used.

The trihydric or higher polyhydric alcohol is blended in an amount of 5 to 20% by weight. If it is less than 5%, the stability of the gel will deteriorate, and if it exceeds 20%, usability and cleansing function will deteriorate.

Water is added in the range of 0.5 to 30% by weight. If it is less than 0.5% by weight, the stability of the gel over time is poor and 3
If it is blended in an amount of more than 0% by weight, the feel during use will deteriorate, which is not preferable.

In addition, components that are usually added to detergents, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, etc. within the range that does not impair the effects of the present invention,
Glycerin fatty acid ester, polyglycerin fatty acid ester, ethylene oxide derivative of glycerin fatty acid ester, propylene glycol fatty acid ester, ethylene oxide derivative of propylene glycol fatty acid ester, polyethylene glycol fatty acid ester, polyethylene alkyl ether, polyoxyethylene alkyl ether,
Nonionic surfactants such as polyoxyethylene alkyl phenyl ether, polyoxyethylene castor oil derivative, polyoxyethylene hydrogenated castor oil derivative, polyoxyethylene phytostanol, phytosterol derivative, and POE-POP block polymer may be contained. .

As a method for obtaining the gel cleansing agent of the present invention, a method which has been conventionally used, for example, a so-called agent in oil method in which a surfactant is previously added to an oil phase is used. In the manufacturing process, a method that utilizes the heavy viscosity immediately after phase inversion, a paste method, that is, a method in which an emulsifier is added to a small amount of an aqueous phase and an oil phase is added little by little to this, and an oil-in-gel emulsion in a surfactant is used. Any of the manufacturing methods such as the method described above can be preferably used.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

The ingredients shown in Table 1 were used to produce gel cleansing agents of Examples 1-8.

[0024]

[Table 1]

[0025]

Comparative Example Using the components shown in Table 2, gel cleansing agents of Comparative Examples 1 to 5 were produced.

[0026]

[Table 2]

Test Example 1. With respect to the cleansing materials of Examples 1 to 7 and Comparative Examples 1 to 5, the gel state was observed. Good gel condition was marked with ◯, and separated gel was marked with x.

Test Example 2. With respect to the gel cleansing agents of Examples 1 to 7 and Comparative Examples 1 to 5, 0.1 g of a liquid foundation excellent in adhesiveness containing 0.2% by weight of an acrylic acid-octyl acrylate copolymer was added to the inner arm of the upper arm for 3 ×. Three
cm size, further apply gel cleansing agent and cleanse several times, then rinse with warm water to remove residual amount of foundation ◎: No foundation remains ○: Foundation hardly remains △: Slightly The foundation remained x: Evaluation was made according to the criteria that the foundation remained considerably.

Test Example 3. The gel cleansing agents of Examples 1 to 7 and Comparative Examples 1 to 5 were used by specialized panelists, and a sensory evaluation was performed on three items: the feeling during use, the feeling after use, and the wash-off property. The criteria are all 3 items: ⊚: very good ∘: good Δ: normal ×: bad

Table 3 shows the evaluation results of Test Examples 1 to 3.

[0031]

[Table 3]

As is clear from the results in Table 3, the gel cleansing agent of the present invention has excellent detergency even for a makeup cosmetic having high adhesiveness, has good spreadability during application, and is well known to the skin, and after washing off. It was also refreshing and did not give a sticky feeling. The gel cleansing agent of the present invention was also excellent in stability.

[0033]

EFFECTS OF THE INVENTION The gel cleansing agent of the present invention is excellent in detergency for high-adhesion makeup cosmetics,
A cleansing agent that spreads well when applied and fits well to the skin and does not give a refreshing, sticky feeling even after washoff. Further, the cleansing agent of the present invention is excellent in stability over time.

Claims (1)

[Claims] 1. A nonionic surfactant represented by the following general formula (1) in an amount of 0.1 to 10% by weight, (b) a higher fatty acid salt in an amount of 0.1 to 8% by weight, and (c) an oil content of 30. ~ 90% by weight
(D) Trihydric or higher polyhydric alcohol 5 to 20% by weight (e)
A gel cleansing agent containing 0.5 to 30% by weight of water. Embedded image RO (C ₄ H ₈ O) _x (C ₃ H ₅ (OH) O) _Y H (1) (wherein R is a linear or branched alkyl group having 8 to 36 carbon atoms) Represents a group or an alkenyl group, X represents an integer of 1 to 60, and Y represents an integer of 3 to 60.)