JPH05208905A - Gel composition for skin cleansing - Google Patents

Abstract

PURPOSE:To provide the subject gel composition good in cosmetic removal, washability in cosmetic removing, and refreshing feeling after such washing away. CONSTITUTION:The objective composition comprises (A) as the base, a two- phase gel-like structure composed of a hydrophobic nonionic surfactant, a polyhydric alcohol having >= tervalency an oil ingredient, and water and (B) an anionic surfactant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel gel composition for cleansing the skin, more specifically, for cleansing the skin, which has a good cleansing property, a washability when the cosmetic product is dropped, and a refreshing feeling after washing. The present invention relates to a gel composition.

[0002]

2. Description of the Related Art Conventionally, as a cleansing product for removing makeup, dosage forms such as creams, emulsions and lotions have been known, and recently, in addition to these, oil and gel type products having further improved detergency. Has been used.

Various techniques are known for the gel composition for skin cleansing (Japanese Patent Laid-Open No. 62-53).
In these compositions, it is necessary to increase the amount of oil in order to improve makeup removal in order to provide a makeup removing effect by dispersing makeup cosmetics such as foundation with oil. ..

However, since the blending amount of the oil component is limited in the gel composition of the one-phase region, the two-phase region must be taken to increase the blending amount of the oil component. The product had a drawback that it had a sticky feeling during and after use, had low water solubility, and lacked stability over time.

[0005]

Under the circumstances, the present invention provides a good gel state, good makeup removal, stability, washability and a refreshing feeling after washing. It was made for the purpose of providing a gel composition for skin cleansing, which is based on a gel structure in the two-phase region.

[0006]

Means for Solving the Problems The present inventors have earnestly studied to develop a skin cleansing composition based on a gel structure having a two-phase region, which has good usability and excellent storage stability. As a result, the composition based on a gel structure in the two-phase region consisting of a hydrophilic nonionic surfactant, a trihydric or higher polyhydric alcohol, an oil component and water, and containing an anionic surfactant It was found that the object could be achieved depending on the product, and the present invention was completed based on this finding.

That is, the present invention is based on a gel structure in the two-phase region consisting of a hydrophilic nonionic surfactant, a trihydric or higher polyhydric alcohol, an oil component and water, and an anionic surfactant. The present invention provides a gel composition for skin cleansing, which comprises:

Examples of the hydrophilic nonionic surfactant used in the composition of the present invention include polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, ethylene oxide derivative of glycerin fatty acid ester, and ethylene oxide of propylene glycol fatty acid ester. Derivative, polyethylene glycol fatty acid ester,
H such as polyoxyethylene alkyl phenyl ether
The LB value is 10 or more.

These nonionic surfactants may be used alone or in combination of two or more, and the compounding amount thereof is usually 1 to 3 based on the weight of the gel structure.
It is selected in the range of 0% by weight, preferably 10 to 25% by weight.

Examples of trihydric or higher polyhydric alcohols include glycerin, sorbit, diglycerin, polyglycerin, trimethylolpropane, erythritol, pentaerythritol, sorbitan, glucose,
Examples thereof include maltitol, saccharose, trehalose, polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside, and of these, glycerin and sorbitol are particularly preferable.

These trihydric or higher polyhydric alcohols may be used alone or in combination of two or more, and the blending amount thereof depends on the feel and viscosity of the gel composition. However, it is usually 1 to 5 based on the total weight of the composition.
It is selected in the range of 0% by weight, preferably 5 to 15% by weight.

On the other hand, the oil component used in the composition of the present invention is an oil component commonly used as a component of cosmetics, pharmaceuticals and the like, and examples thereof include hydrocarbons and higher alcohol higher fatty acids. There are esters, higher alcohols, higher fatty acids, animal and vegetable fats and oils, cholesterol fatty acid esters, among which glyceryl triisooctanoate, liquid paraffin, isostearyl cholesteryl ester, 2-ethylhexanoic acid triglyceride, octadecyl myristate. , Olive oil and the like are particularly preferable. These oil components may be used alone or in combination of two or more. The blending amount is usually 1 to 90% by weight based on the weight of the gel structure,
It is preferably selected in the range of 30 to 80% by weight.

The water content is appropriately selected according to the purpose of use of the composition and appropriate physical properties, but is usually selected in the range of 1 to 40% by weight, preferably 5 to 30% by weight based on the weight of the gel structure. Be done.

The two-phase region gel structure referred to in the present invention is semi-transparent in appearance and is in a slightly cloudy gel state. Structurally, it is mainly composed of an oil in a surfactant, but since an oil component is also present as a dispersoid, it is characterized by being able to solubilize a large amount of makeup cosmetics such as foundation.

In such a gel structure, for example, a nonionic surfactant, a polyhydric alcohol having a valence of 3 or more, and water are mixed in respective required ratios, and the mixture is heated and dissolved, and then the heated oil component is gradually added. It can be prepared by adding and cooling to room temperature with stirring.

The anionic surfactant contained in the gel structure is, for example, sodium N-lauroylsarcosine, sodium N-coconut oil fatty acid acyl-L-glutamate, polyoxyethylene alkyl ether phosphate, polyoxyethylene. Nonyl phenyl ether phosphate etc. are mentioned.

These anionic surfactants may be used alone or in combination of two or more, and the compounding amount thereof is usually selected in the range of 0.1 to 20% by weight. This anionic surfactant is usually used together with a nonionic surfactant when preparing a gel structure having a two-phase region.

In the composition of the present invention, if necessary, various additives conventionally used in the composition for skin cleansing, such as preservatives, may be used as far as the object of the present invention is not impaired.
Dyes, antioxidants, vitamins, plant extracts, fragrances and the like can be added.

[0019]

The function of the present invention is estimated as follows. That is, the gel composition for skin cleansing of the present invention is applied to the skin and then massaged to increase the temperature due to body temperature, change in HLB due to water evaporation, and change in structure due to stress. In this state, it becomes a mixture of the oil component and the activator and is softened or liquefied. When water is added thereafter, the activator immediately becomes a continuous phase via the gel-like structure before coating, and the oil component becomes a dispersed phase. After that, the oil component becomes extremely fine oil-in-water type emulsified particles with a large amount of water and is easily removed from the skin. By using an anionic surfactant in combination here, the dispersibility in water is increased, and the ratio of fine oil-in-water emulsified particles is increased without going through a gel-like structure, thereby facilitating washing with water and washing off. After refreshing, the refreshing feeling is improved.

[0020]

EFFECT OF THE INVENTION The gel composition for skin cleansing of the present invention has a gel form that is easy to handle, and when applied to the skin, it softens due to evaporation of water, so that it has an excellent feeling of use such as spreadability and slipperiness, Good penetration of details. Further, when water is added, the combined use of the anionic surfactant makes the oil component easily fine oil-in-water particles and is removed from the skin, so that the base component does not remain,
You can get a refreshing feeling with good washability.

[0021]

EXAMPLES The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The characteristics of the composition were evaluated as follows.

(1) Appearance Visual observation. (2) Feeling of use A panel test by 10 female panelists evaluated the washability, the refreshing feeling after washing, and the makeup removing effect in a sensory manner. In this panel test, about 2 g of the composition was applied to the face, massaged for about 60 seconds, washed with warm water, and evaluated according to the following criteria. ○: good, △: somewhat bad, ×: bad

Example 1 Surfactant obtained by heating and dissolving and mixing a surfactant of the type and amount shown in Table 1, a polyhydric alcohol having a valence of 3 or more and water in the amount shown in Table 1 at about 70 ° C. The amount of glyceryl triisooctanoate heated to about 70 ° C. in the phase was slowly added while stirring, and then this was stirred and cooled to room temperature to prepare a gel composition, and its properties were evaluated. The results are shown in Table 1. However, No. 1-3,5,7
And 9 are comparative examples.

[Table 1]

Example 2 In the same manner as in Example 1, 55% by weight of glyceryl triisooctanoate, 6.0% by weight of glycerin, and sorbit 6.
A base consisting of 6% by weight and 12.4% by weight of purified water was added to Table 2
A gel composition containing the surfactant of the type and amount shown in 1 was prepared and its performance was evaluated. The results are shown in Table 2.

[Table 2] In addition, No. Regarding 3, 4, 11, and 12, a markedly refreshing feeling was exhibited. In addition, No. 3 and 4 were particularly excellent in gel forming property.

Example 3 1.8 parts by weight of glycerin, 10.8 parts by weight of sorbit,
12.4 parts by weight of purified water, POE (40) hydrogenated castor oil 1
6.0 parts by weight, 1.0 part by weight of N-coconut oil fatty acid acyl-L-glutamate and 3.0 parts by weight of POE (8) trialkyl ether phosphoric acid were dissolved and mixed by heating at about 70 ° C. 55.0 parts by weight of glyceryl triisooctanoate heated to 70 ° C. was slowly added with stirring, and then cooled to room temperature to prepare a gel composition for skin cleansing. This product had a semi-transparent gel-like appearance, and was good in all of the washability, the refreshing feeling after washing, and the makeup removing effect.

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Claims (2)

[Claims] 1. A gel-like structure in a two-phase region composed of a hydrophilic nonionic surfactant, a polyhydric alcohol having a valence of 3 or more, an oil component and water, as a base, and containing an anionic surfactant. A gel composition for skin cleansing, comprising: 2. A gel-like composition having a hydrophilic nonionic surfactant in an amount of 1 to 30% by weight and a trihydric or higher polyhydric alcohol in an amount of 1 to 5.
0 wt%, oil component 1-90 wt% and water 1-40 wt%
The content of the anionic surfactant is 0.1 to 2
The gel composition for skin cleansing according to claim 1, which is 0% by weight.