JPH01102012A - Cosmetic - Google Patents

Abstract

PURPOSE:To obtain a hydrophilic cosmetic, containing a gel composition prepared by blending an anionic surfactant with a liquid oil, water-soluble substance having >=3 hydroxyl groups and water at a specific ratio as a base and having excellent high-temperature preservation stability,usability and water-washing properties. CONSTITUTION:A cosmetic containing a gel composition prepared by blending (A) an anionic surfactant, preferably polyhydric alcohol ester of a fatty acid or polyoxyethylene adduct of a polybasic acid ester salt, especially polyoxyethylene hardened castor oil succinic acid ester salt with (B) a liquid oil, (C) a water-soluble substance having >=3 hydroxyl groups and (D) water as a base. The amounts of the ingredients based on the total amount of the gel composition are 8-30wt.% ingredient (A), 20-80wt.% ingredient (B), 5-50wt.% ingredient (C) and 2-30wt.%, preferably 5-20wt.% ingredient (D). The cosmetic has excellent high-temperature stability and long-period preservation stability and is readily washable away with water or lukewarm water after use.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to cosmetics that have good high temperature stability and long-term storage stability and can be easily washed off with water or lukewarm water after use.

[Conventional technology] Conventionally, cleansing products for removing makeup include cleansing creams and cleansing lotions, and recently, cleansing oils and cleansing gels with improved cleaning power against oil-based stains (makeup, etc.) have been introduced. It is being used. The technology for such gel-like cleansing cosmetics is disclosed in Patent Publication No. 59-46123.60-
115509.62-53910 etc.

These products have a gel-like appearance and have good detergency and water washability, but their storage stability, especially high temperature stability, is poor (they cannot be stored in the summer or in the bathroom). There were some problems such as oil separation.

[Problems to be solved by the invention] In view of the current situation, the present inventors have developed a method with good characteristics (usability).
In search of cosmetics with good storage stability,
As a result of extensive studies, we have discovered that a gel composition that satisfies the intended purpose can be obtained by using an anionic surfactant and blending each component in the following composition, leading to the present invention. . Note that the gel composition as used in the present invention is a structure that has a transparent appearance at room temperature, that is, is transparent or translucent, regardless of whether it is anisotropic or isotropic.

[Means for Solving the Problems] That is, the present invention uses 8 to 30% by weight of anionic surfactant.
, liquid oil 20-80! The present invention relates to a cosmetic based on a gel composition obtained by blending 5 to 50% by weight of a water-soluble substance having three or more hydroxyl groups, and 2 to 30% by weight of water.

Hereinafter, the configuration of the present invention will be explained in detail.

The anionic surfactants used in the present invention include polyoxyethylene alkyl ester polybasic acid ester salt type, polyoxyethylene alkyl ether polybasic acid ester salt type, polyoxyethylene polyhydric alcohol fatty acid ester polybasic acid ester salt type, It is a polyglycerol fatty acid ester succinate salt type and consists of a relatively large lipophilic portion, a polar group portion such as a polyoxyethylene chain, and a carboxylate portion. The lipophilic portion of the anionic surfactant used in the present invention is usually composed of a higher fatty acid and has about 10 to 30 carbon atoms, preferably 12 to 24 carbon atoms. Next, regarding the degree of polymerization of the polyoxyethylene chain, a good value is about 5 to 120 (average). Regarding polybasic acids, usually
Dibasic acids such as oxalic acid, succinic acid and maleic acid are used, but tribasic acids such as malonic acid and citric acid also give good gel compositions. The basic substances used to neutralize polybasic acid residues include metal hydroxides such as sodium and potassium, organic amines such as triethanolamine and isopropanolamine, and bases such as arginine and lysine. and amino acids. Neutralization of polybasic acid residues with a basic substance may be either partial or complete neutralization, but stability at high temperatures is better when it is closer to complete neutralization.

Specific examples of these anionic surfactants used in the present invention include polyoxyethylene fatty acid ester succinate potassium salt, polyoxyethylene sorbitan fatty acid ester succinate sodium salt, polyoxyethylene eicosyl ether succinate, Polyoxyethylene glycerin fatty acid ester succinate ester salt, polyoxyethylene hydrogenated castor oil succinate ester salt, polyglycerin fatty acid succinate ester potassium salt, trisaccharide fatty acid ester succinate sodium salt, polyoxyethylene sorbitol fatty acid succinate ester salt Among them, polyoxyethylene sorbitan fatty acid ester succinate ester sodium salt, polyoxyethylene hydrogenated castor oil succinate ester salt, and polyglycerol fatty acid succinate ester potassium salt are particularly preferred.

Further, these surfactants can be used alone or in combination.

In addition to the surfactant of the present invention, nonionic surfactants and the like that are commonly used in cosmetics can also be blended as appropriate.

The amount of anionic surfactant used in the present invention is 8 to 30% by weight based on the total amount of the gel composition.

If the anionic surfactant content is less than 8% by weight, the washability after use will not be good, that is, the feel will not be smooth after washing. Moreover, if it is blended in an amount exceeding 30% by weight, the storage stability will be poor, such as separation occurring, making it unsuitable as a product.

The aqueous gel obtained by mixing the anionic surfactant used in the present invention and the aqueous phase is very stable with respect to temperature and has little change in viscosity. Therefore, the gel composition of the present invention obtained by adding the oil phase of the present invention, which will be described later, to this aqueous gel has good storage stability at various temperatures.
There are no problems with separation between the temperatures. on the other hand,
In the case of ordinary nonionic surfactants, the aqueous gel that forms together with the aqueous phase is easily affected by temperature (at high temperatures, it loses its viscosity and no longer exhibits a gel state; In addition, when a gel cleanser is used, separation occurs at high temperatures.

The liquid oils used in the present invention include those commonly used in cosmetics, such as hydrocarbons, higher fatty acids, higher alcohols, fatty acid esters, vegetable oils, animal oils, or synthetic oils. Shaped and semi-solid oils are also suitable for cleansing.

It can be blended within a range that does not lose its spreadability and lightness.

Preferred liquid oils include liquid paraffin, squalane, cetyl iso-octanate, 2-ethylhexanoic acid triglyceride, olive oil, silicone oil, and ocdildodecanol, which may be used alone or in combination, but after cleansing. From the standpoint of water removal, it is easier to wash off if you use more polar oil.

The amount of liquid oil used in the present invention is 20 to 80% by weight based on the total amount of the gel composition. If the liquid oil has less than 20 layers, the cleaning power against oily stains such as makeup will not be sufficient, and the performance as a cleansing cosmetic will be poor. Furthermore, if the amount exceeds 80% by weight, oil separation occurs and the storage stability becomes poor, making it unsuitable as a product.

Examples of water-soluble substances having three or more hydroxyl groups used in the present invention include trihydric alcohols such as glycerin, trimethylolpropane, and 1,2,6-hexandriol, tetrahydric alcohols such as pentaerythritol, and xylitol. pentavalent alcohols such as sorbitol, hexavalent alcohols such as mannitol, polyhydric alcohol polymers such as triglycerin, tetraglycerin, polyglycerin, sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose , fructose, starch-degrading sugar, maltose, xylitol, starch-degrading sugar-reducing alcohol, and other sugar alcohols.

The amount of the water-soluble substance having three or more hydroxyl groups used in the present invention is 5 to 50% by weight. If it is less than 5% by weight, a gel may be formed, and if it exceeds 50 parts, the cleaning power will be poor, which is not preferable.

The amount of water used in the present invention is 2 to 30% by weight, preferably 5 to 20% by weight.

The cosmetic composition of the present invention uses the above-mentioned gel composition as a base and usually includes:
Oil ingredients, drugs, disinfectants, coloring materials used in cosmetics, etc.
It can be obtained by appropriately blending powder or the like during or after the preparation of the gel composition.

In addition to being used as a cleansing cosmetic for removing makeup, the gel composition according to the present invention can also be used as a medicinal flower cosmetic or pharmaceutical by mixing various agents into the gel composition. .

Examples of methods for producing the gel composition of the present invention include the following method. That is, first, an anionic surfactant is sufficiently dissolved in an aqueous phase consisting of water and a water-soluble substance having three or more hydroxyl groups to obtain a highly viscous translucent gel. An oil phase is then gradually added to this gel to form the gel composition of the present invention. The gel obtained here has very good temperature stability, and its physical properties hardly change with temperature changes. In particular, regarding high-temperature stability, compared to the gel-like material obtained when using a nonionic surfactant, which undergoes two-phase separation in 1 to 2 days at a temperature of 45 to 50 °C, the anionic interface of the present invention The gel composition obtained using the active agent can maintain its initial state for several months even at this temperature and has very good stability.

[Effects of the Invention] The present inventors have long focused on the properties of anionic surfactants and have repeatedly studied their applications. By blending in accordance with certain regulations, it is possible to obtain hydrophilic cosmetics with excellent high-temperature storage stability, ease of use, and washability.

[Example] Next, the present invention will be explained in detail with reference to Examples. Note that the present invention is not limited to this. The blending amount is in weight%.

Prior to Examples, test methods and evaluation methods are shown below.

five dishes Appearance was determined visually.

After preparing the sample, it was stored in a constant temperature bath at -10°C and 45°C, and changes over time were observed. The evaluation criteria are as follows.

0...Very good O...Good Δ...Slightly good This test was based on the evaluation of the feeling of dullness when washing the face. Evaluation was performed on a five-point scale from 1 (bad) to 5 (good), and those with an average of 4 or more were judged as "good", and those with an average of 4 or more were judged as "poor".

Examples 1 to 5 and Comparative Examples 1 to 5 are shown in Table 1 and Table 2.

(The following is a blank space) As can be seen from Table 1.2, the examples of the present invention were excellent in external strength, stability, and washability.

<Example 6> Purified water 8 Glycerin 161.3-Butylene glycol 4 Diisostearic acid decaglycerin succinate potassium salt 18 Tri-2-ethylhexanoic acid glycerin 33.8 Squalane
10 olive oil
10 fragrances
0゜2 is an aqueous phase component based on the above formulation,
Purified water, glycerin, and 1,3-butylene glycol are mixed, heated to 50°C, and decaglycerin diisostearate is added and mixed to obtain a highly viscous gel. Next, the mixed oil phase was added thereto under stirring, cooled to 30° C., and defoamed to obtain a transparent gel composition for lensing.

<Example 7> Purified water 7 Glycerin 8 Sorbitol solution (70%) 10 Polyoxyethylene (50 mol addition) Hydrogenated castor oil succinate potassium salt 20 Cetyl isooctanoate 52 Vaseline 3 Same as Example 1 based on the above recipe A gel composition was obtained by the method.

<Example 8> Purified water 11 Glycerin 4 Dipropylene glycol 10 Polyoxyethylene (
40 moles added) Sorbitan succinate sodium salt 10 pieces wax 2 petrolatum
15 medium chain fatty acids (Ca, 1o
) Triglyceride 48 Example 1 based on the above formulation
A gel composition for pine surge was obtained in the same manner as above.

<Example 9> Purified water 29.6 Glycerin 10 Maltitol solution (70%) 20 Polyoxyethylene (20 mole addition) Stearic acid Glycerin succinate triethanolamine salt 15 Squalane
5 octyldodecanol 10 dimethyl silicone (10c
ps) 10 ethylparaben
0.2 fragrance
0.2 A milky lotion was obtained in the same manner as in Example 1 based on the above formulation.

Examples 6 to 9 were excellent in effects such as high temperature stability.

Patent applicant: Shiseido Co., Ltd.

Claims (3)

[Claims] (1) Anionic surfactant 8-30% by weight, liquid oil 20%
~80% by weight, water-soluble substance having 3 or more hydroxyl groups5~
A cosmetic based on a gel composition obtained by blending 50% by weight and 2 to 30% by weight of water. (2) The cosmetic according to claim (1), wherein the anionic surfactant is a polyoxyethylene adduct of a salt of a polyhydric alcohol fatty acid ester polybasic acid ester. (3) Claim No. 1 in which the anionic surfactant is a polyoxyethylene hydrogenated castor oil succinate salt.
Cosmetics listed in ).