JPH05163131A - Skin cosmetic - Google Patents

Abstract

PURPOSE:To obtain a skin cosmetic having improved stability with time, excellently astringing action and conditioning and protecting action on skin by using both a polyphenol compound and an alkylglycoside. CONSTITUTION:A skin cosmetic using both a polyphenol (e.g. tannin of Japanese persimmon or pyrogallol) and an alkylglycoside (e.g. dodecyl-beta-D-maltoside) having excellently pharmaceutically manufacturing function without forming a complex between both molecules. For example, toilet lotion, milky lotion, cream, pack, cleansing, face washing agent, make-up base, foundation, lip cream or lipstick may be cited as the cosmetic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention has good stability over time,
The present invention relates to a skin cosmetic having excellent astringent action and skin conditioning / protecting action.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
Zinc compounds (for example, zinc paraphenolsulfonate, zinc oxide) and aluminum compounds (for example, aluminum chloride, basic aluminum chloride, etc.) as active ingredients for astringent action and skin conditioning / protecting action on skin are contained in skin cosmetics. Are included, but are they accompanied by skin irritation?
There was a problem that the effect was insufficient, etc., and a satisfactory product could not be obtained.

In view of such a situation, the present inventor has found that the condensed tannin contained in persimmon has an extremely excellent astringent action and skin conditioning / protecting action, and has no skin irritation and is incorporated into a skin cosmetic composition. It was found that the active ingredient is very suitable for the treatment (Japanese Patent Laid-Open No. 61-236713).

On the other hand, the polyoxyethylene-addition type nonionic surfactant can be arbitrarily set in the polyoxyethylene chain length and the alkyl chain length, and is therefore widely used in skin cosmetics as an emulsifier, a solubilizer and a dispersant. Has been done. However, when a skin cosmetic comprising a combination of a polyoxyethylene addition type nonionic surfactant and a polyphenol compound is produced, a complex is produced as an insoluble substance due to an interaction between both molecules, and therefore, as a skin cosmetic. It was found that the formulation function is impaired, and at the same time, the astringent action on the skin and the skin conditioning / protecting action are not sufficiently satisfied.

The inventors of the present invention have made extensive studies as a remedy for this drawback. As a result, when a polyphenol compound and an alkyl glycoside are used in combination, an excellent formulation function is achieved without forming a complex between both molecules. It was found that a skin cosmetic having the following can be obtained, and the present invention was completed.

That is, an object of the present invention is to provide a skin cosmetic having good stability over time and having excellent astringent action and skin conditioning / protecting action.

[0007]

In order to achieve the above object, the skin cosmetic of the present invention has the following constitution. That is, it is a skin cosmetic containing a polyphenol compound and an alkyl glycoside.

Examples of the polyphenol compound in the present invention include gallic acid, gallic acid esters (propyl ester, isoamyl ester, octyl ester, dodecyl ester, etc.), pyrogallol, phloroglysin, catechin, epicatechin, gallocatechin, catechin gallate, gallocatechin. Galate, epicatechin gallate, epigallocatechin gallate, epigallocatechin, glucogallin, proanthocyanidins and polymers thereof, flavones (for example, rutin, quercetin, quercetagin, quercetaginine, gosipetin, etc.), ellagic acid, penta-O-galloyl glucose , Tannic acid, gallotannin (tannin of peony extract), ellagitannin (genoshoko, red-skinned wrinkles, pomegranate skin, sanshuyu, koshiko, etc.) Each tannin) has, condensed tannins (astringent persimmon, tea, cinnamon, Uncaria gambir Roxburgh, each tannin extracted from Chinire tea, etc.), Quercus salicina bark, oak bark, may be mentioned the tannin or the like extracted from the nuts and the like.

The alkyl glycoside in the present invention is composed of an alkyl group or an alkenyl group having 8 to 22 carbon atoms and a sugar moiety derived from 1 to 5 reducing sugars having 5 to 6 carbon atoms. Examples of monosaccharides include glucose, galactose, xylose, fructose, mannose, lyxose, and apibinose, and examples of disaccharides or more include maltose, xylobiose, isomannose, lactose, sucrose, raffinose, maltotriose, and the like.
Of these, particularly preferable raw materials are glucose, fructose, maltose, and sucrose from the viewpoint of cost. And, in the case of an alkyl glycoside composed of two or more sugar moieties, the binding mode of the sugar chain is 1-2,
It is possible to use 1-3, 1-4, 1-6 bonds, further α, β-pyranoside bonds, or furanoside bonds and any mixture thereof. Therefore, for example, decyl-β-D-glycoside, tetradecyl-α-D-fructoside, dodecyl-β-D-maltoside, octadecyl-α-D-sucroside and the like can be mentioned.

The skin cosmetics of the present invention include, for example, lotion, emulsion, cream, pack, cleansing, face wash, makeup base, foundation, lip balm, lipstick, etc., but are not particularly limited thereto. Instead, it can be applied to other skin cosmetics and quasi drugs.

[0011]

The present invention will be described in more detail by way of examples. The parts shown in the examples mean parts by weight.

Before describing the embodiments in detail, the test method used therein will be described.

1. Method for testing stability over time Immediately after the production of the skin cosmetics shown in Examples and Comparative Examples and 4
After leaving it in a closed container in a thermostat at 0 ° C. for 6 months (acceleration test), the appearance was visually evaluated.

2. Utility (astringent effect on skin and skin conditioning
Protective Effect) Test Method Regarding the astringent effect of the skin cosmetics shown in Examples and Comparative Examples on the skin, 10 professional inspectors selected from those who have rough skin are tested once a day for 7 consecutive days. After 0.3 g of skin cosmetics was uniformly applied to the skin and a practical test was performed, the skin condition on the 8th day was judged and evaluated according to the following criteria. 5: The astringent action of the skin is very good. 4: The astringency of the skin is slightly good. 3: Normal astringency of the skin. 2: The astringency of the skin is rather poor. 1: Skin has poor astringency. Further, from the viewpoint of improving rough skin, the skin conditioning / protecting action was also judged in the same manner as above, and evaluated on the basis of the same 5 grades.
The average value of the evaluation points by 10 professional inspectors was used as the score of each sample.

Example 1 (Astringent lotion) (1) Formulation Ethanol 10.0 parts Persimmon tannin (condensation type) 0.5 parts Sodium citrate 0.05 parts Citric acid 0.05 parts Erythorbic acid 0.4 parts EDET Disodium acid salt 0.1 part Dodecyl-β-D-maltoside 0.4 part Perfume 0.05 part Purified water 88.45 part (2) Production method

Ingredients (1) to (5) are dissolved in the above ingredients, and the solution and the ingredients and the ingredients are dissolved,
A uniform system was obtained by mixing to obtain the astringent lotion of the present invention. Performed the above-mentioned tests using this astringent lotion as a sample,
The results obtained are shown in Table 1. Astringent action and skin conditioning
The protective action (improvement of rough skin) was very good, and the appearance after standing for 6 months was transparent with no precipitates and had a formulation function as a cosmetic.

[0017]

[Table 1]

Comparative Example 1 Astringent lotion of Comparative Example 1 was obtained by the same formulation and manufacturing method except that polyoxyethylene (20 mol) sorbitan oleate was used in place of the formulation components described in Example 1. The above-mentioned various tests were carried out using this as a sample, and the obtained results are shown in Table 1. Immediately after the preparation of the sample, the sample became cloudy and the perfume floated or separated. The astringent effect on the skin was poor, and the skin conditioning / protecting effect was also poor. In addition, the appearance after being left for 6 months was in a two-layer separated state, white turbidity remained, and the formulation function as a cosmetic was lost.

Example 2 (Cream) (1) Formulation 1 Squalane 25.0 parts 2 Cetyl alcohol 3.0 parts 3 Glycerin tri-2-ethylhexanoate 5.0 parts 4 Decyl glucoside (β / α = 1) 1 0.0 part 5 tetradecyl glucoside (β / α = 1) 1.0 part 6 stearic acid 0.5 part 7 xanthan gum 0.1 part 8 dodecyl maltoside (β / α = 3) 0.7 part 9 paraoxybenzoic acid Methyl 0.2 part 10 Disodium edetate 0.1 part 11 Sodium citrate 0.1 part 12 L-Ascorbic acid 0.1 part 13 Tannic acid (hydrolyzable) 0.1 part 14 Perfume 0.1 part 15 Purified water 63.0 parts (2) Manufacturing method

The above components 1 to 5 are uniformly dissolved at about 80 ° C. (solution I). A part of the water-soluble components 7 to 9 and 15 of the above components are uniformly dissolved at about 80 ° C. (Solution II). Ingredient 15
Dissolve 10 to 13 uniformly in the rest of the solution at room temperature (Solution III
). Next, while stirring Solution I with a homogenizer,
Solution II is added, emulsified and cooled. In the cooling process, component 14 was added at 70 ° C and the temperature was lowered to 30 ° C.
I was added and stirring was stopped. The creams thus obtained were used as samples for the above-mentioned tests, and the results are shown in Table 1. The skin astringent action and skin conditioning / protecting action were slightly good, and the appearance after being left for 6 months had a good texture and was uniform, and had a formulation function as a cosmetic.

Comparative Example 2 The same as Example 2 except that polyoxyethylene (2 mol) cetyl ether was used in place of the formulation component and polyoxyethylene (20 mol) oleyl ether was used in place of component and. Comparative Example 2 depending on the formulation and manufacturing method
Got the cream. The above-mentioned various tests were carried out using this as a sample, and the obtained results are shown in Table 1. As for the appearance of the sample immediately after the production, the cream had a bad texture and poor emulsification. When the efficacy of the formulation was tested, the skin astringent effect was poor,
The skin conditioning and protective effects were also poor. In addition, the appearance after being left for 6 months was such that the aqueous phase and the oil phase were separated and the formulation function as a cosmetic was lost.

[0022]

EFFECTS OF THE INVENTION As described above, the skin cosmetic of the present invention has good stability over time and has a very excellent astringent action and skin conditioning / protecting action.

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Claims (1)

[Claims] 1. A skin cosmetic containing a polyphenol compound and an alkyl glycoside.