JP2902842B2 - Skin cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art
In skin cosmetics, a zinc compound (for example, zinc paraphenolsulfonate, zinc oxide) and an aluminum compound (for example, aluminum chloride, basic aluminum chloride, etc.) are contained as active ingredients for exhibiting an astringent action and a skin conditioning / protecting action on the skin. But these are accompanied by skin irritation,
There were problems such as insufficient effects, and satisfactory products could not be obtained.

[0003] In view of such circumstances, the inventor of the present invention has concluded that condensed tannin contained in persimmon has an extremely excellent astringent action, skin conditioning and protective action, has no skin irritation, and is incorporated into skin cosmetics. It has been found that this is an active ingredient which is very suitable for carrying out the method (JP-A-61-236713).

On the other hand, polyoxyethylene-added nonionic surfactants can be used in skin cosmetics as emulsifiers, solubilizers and dispersants because the polyoxyethylene chain length and alkyl chain length can be set arbitrarily. Have been. However, when producing a skin cosmetic comprising a combination of a polyoxyethylene addition type nonionic surfactant and a polyphenol compound, a complex due to an interaction between both molecules is formed as an insoluble substance, so that the skin cosmetic is used as a skin cosmetic. It has been found that the function of the preparation is impaired, and at the same time, the astringent action on the skin and the skin conditioning / protecting action are not sufficiently satisfied.

Therefore, the present inventors have conducted intensive studies to improve this drawback, and as a result, when a polyphenol compound and an alkyl glycoside are used in combination, excellent formulation function is obtained without forming a complex between both molecules. Have been found, and have completed the present invention.

[0006] That is, an object of the present invention is to provide a skin cosmetic composition which has good aging stability, and has an excellent astringent action and a skin conditioning / protecting action.

[0007]

Means for Solving the Problems To achieve the above object, the skin cosmetic of the present invention has the following constitution. That is, a skin cosmetic comprising 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. Gallate, epicatechin gallate, epigallocatechin gallate, epigallocatechin, glucogalin, proanthocyanidins and polymers thereof, flavones (eg, rutin, quercetin, quercetagine, quercetagitin, gossypetin, etc.), ellagic acid, penta-O-galloylglucose , Tannic acid, gallotannins (tannins of peonies extract), ellagitannins (extracted from genoshoko, akamegawiwa, pomegranate skin, sanshuyu, lye, 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 comprises an alkyl group or 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. Monosaccharides include glucose, galactose, xylose, fructose, mannose, lyxose, apivinose and the like, and disaccharides and more include maltose, xylobiose, isomannose, lactose, sucrose, raffinose, maltotriose and the like.
Particularly preferred raw materials among these are glucose, fructose, maltose and sucrose from the viewpoint of cost. And in the case of an alkyl glycoside in which the sugar moiety is composed of two or more, the sugar chain binding mode is 1-2,
1-3, 1-4, 1-6 bonds, furthermore, α, β-pyranoside or furanoside bonds and any mixture thereof are possible. Accordingly, for example, decyl-β-D-glycoside, tetradecyl-α-D-fructoside, dodecyl-β-D-maltoside, octadecyl-α-D-scroside and the like can be mentioned.

The skin cosmetics of the present invention include, for example, lotions, emulsions, creams, packs, cleansings, facial cleansers, makeup bases, foundations, lip balms, lipsticks and the like, but are not particularly limited thereto. And can be applied to other skin cosmetics and quasi-drugs.

[0011]

The present invention will be described in more detail with reference to examples. Parts shown in the examples mean parts by weight.

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

1. Daily stability test method The skin cosmetics shown in Examples and Comparative Examples were prepared immediately after production and
After standing for 6 months in a closed container in a thermostat at 0 ° C. (acceleration test), the appearance was visually evaluated.

2. Usefulness (astringent effect on skin and skin conditioning
Protective action) Test method Regarding the astringent action of the skin cosmetics shown in the examples and comparative examples on the skin, ten specialist inspectors selected from persons with rough skin once a day for seven consecutive days After applying 0.3 g of skin cosmetics uniformly to the skin and performing a practical test, the condition of the skin 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 somewhat good. 3: The astringency of the skin is normal. 2: The astringency of the skin is somewhat poor. 1: The astringency of the skin is poor. Further, from the viewpoint of improving rough skin, skin conditioning / protecting action was also determined in the same manner as described above, and evaluated based on the same five-point standard.
In addition, the average value of the evaluation points by ten specialist inspectors was used as the score of each sample.

Example 1 (astringent lotion) (1) Formulation 10.0 parts of ethanol Persimmon tannin (condensation type) 0.5 part 0.05 parts of sodium citrate 0.05 parts of citric acid 0.4 parts of erythorbic acid 0.4 parts of edet Disodium acid salt 0.1 part Dodecyl-β-D-maltoside 0.4 part Fragrance 0.05 part Purified water 88.45 parts (2) Production method

Ingredients (1) and (2) are dissolved in the above components, and a solution obtained by dissolving the components and components in the components is added to this solution.
The mixture was made uniform to obtain the astringent lotion of the present invention. Performing the above-described tests using this astringent lotion as a sample,
Table 1 shows the obtained results. Astringent action of skin and skin conditioning
The protective action (rough skin improving property) was very good, and the appearance after standing for 6 months was transparent without forming a precipitate, and had a formulation function as a cosmetic.

[0017]

[Table 1]

Comparative Example 1 An astringent lotion of Comparative Example 1 was obtained by the same formulation and production method except that polyoxyethylene (20 mol) sorbitan oleate was used instead of the ingredients described in Example 1. Using these as samples, the above tests were carried out, and the results obtained are shown in Table 1. Immediately after the production of the sample, the sample became cloudy and the fragrance floated or separated. The astringent action of the skin was poor, and the skin conditioning / protective action was somewhat poor. In addition, the appearance after standing for 6 months showed a two-layer separation state, opacity 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 Decylglucoside (β / α = 1) 1 1.0 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 Fragrance 0.1 part 15 63.0 parts of purified water (2) Production method

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

COMPARATIVE EXAMPLE 2 The same procedure as in Example 2 was repeated except that polyoxyethylene (2 mol) cetyl ether was used in place of the ingredients and polyoxyethylene (20 mol) oleyl ether was used in place of the ingredients. Comparative Example 2 depending on formulation and manufacturing method
I got a cream. Using these as samples, the above tests were carried out, and the results obtained are shown in Table 1. Immediately after the production of the sample, the texture of the cream was poor and the emulsification was poor. When the effectiveness of the formulation was tested, the astringent action of the skin was poor,
Skin conditioning and protection were also poor. In addition, after standing for 6 months, the aqueous phase and the oil phase were separated, and the formulation function as a cosmetic was lost.

[0022]

As described above, the skin cosmetic composition of the present invention has good stability over time and has an extremely excellent astringent action and skin conditioning / protecting action.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI A61K 7/00 A61K 7/00 W

Claims (1)

(57) [Claims] 1. A skin cosmetic comprising a polyphenol compound and an alkyl glycoside.