JPH10130138A - Skin cleansing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a skin-cleansing agent excellent in skin aging preventing effect by including a plant of the family Betulaceae and a higher fatty acid soap. SOLUTION: This skin-cleansing agent comprises 0.001-10wt.% extract of a plant belonging to the genus platyphylla of the family Betulaceae and/or a plant belonging to the genus Alnus and 5-40wt.% 12-18C higher fatty acid soap (e.g. lauric acid). The plant extract is obtained by preferably using bark of the plant and extracting the bark with a solvent such as ethanol or water. The skin-cleansing agent can be prepared in the form of solid, paste, liquid, gel, foam, etc. Thereby, a skin-cleansing agent having promotion of proliferation and differentiation of epidermal cell, turn over promotion of horny layer, improving effect on keratin and skin-beautifying effect, etc., and excellent in prevention of skin aging is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cleanser excellent in skin aging prevention effect.

[0002]

2. Description of the Related Art In aging skin, the cell activity of the epidermis and the dermis is reduced, and as a result, dry skin due to a decrease in the function of the stratum corneum and inelastic skin due to a decrease in the function of the dermal fibroblasts are obtained. In order to restore the activity of such aged skin, a search for a cell activator was performed, and as a result, epidermal cells prominently proliferated in an extract of birch belonging to birch or alder belonging to alder in the birch family. It has an effect of promoting the function of the stratum corneum and improving the function of the stratum corneum. On the other hand, the most desirable opportunity to activate epidermal cells is immediately after removing excess dirt and grime, but conventional skin cleansers have only the function of removing dirt. doing. Therefore, development of an excellent skin aging prevention cleaning agent has been desired.

[0003]

Means for Solving the Problems The present inventors have intensively studied a skin cleansing agent having an excellent effect of preventing skin aging, and as a result, have found that plants belonging to the birch genus and / or plants belonging to the genus Alnus in the birch family. Extract and total carbon number 12 ~
The present inventors have found that a skin cleanser containing 18 higher fatty acid soaps is effective in preventing skin aging, and completed the present invention.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The birch birch plant extract used in the present invention is, for example, birch (Betula platyph).
ylla var. japonica), birch birch (Betula pl)
atyphylla var.platyphylla), Betula (Betula)
platyphylla var.szechanica), European birch (Betula pendula), birch (Betula pubescens),
Tortoise birch (Betula pubescens var.tortuos
a), Iberian birch (Betula certiberica), Betula papyrifera, Betula papyrifera
It is an extract from Kenaiica (Betula kenaica), Betula populifolia, and the like. In addition, alder plant extracts of the same family include, for example, alder (Alnus japonica) and Ezo alder (yellow alder).
(Alnus japonica var.arguta), cherry alder (A
lnus trabeculosa, Nepal alder (Alnus nepale)
nsis), Alder hirsuta (Alnus hirsuta), Alder arbor (Alnus hirsuta var. sibirica), Alder arbor (Alnus matsumurae), Alpine arboretum (Alnus inokumae), Alder alder (Alnu)
s serrulatoides). Among these plants, especially birch (Betula platyphyllavar.japonic)
a), Betula platyphylla var.pl
atyphylla, European birch (Betula pendul)
a) is preferred.

[0005] These extracts can be used at any site such as leaves, xylem, and bark of the plant, with bark being preferred. Although the extraction solvent is not particularly limited, benzene, ethyl ether, chloroform, ethyl acetate, butyl acetate, acetone, methanol, ethanol or 1,3-butylene glycol, water and the like can be exemplified, and ethanol and water are particularly preferable. These extraction solvents may use one kind or a mixture of two or more kinds. The extraction operation is carried out by a conventional method, and the extract can be used as it is, or can be blended in the form of a soft extract obtained by concentrating the extract, or an extract powder that has been evaporated to dryness.

The content of these extracts is 0.001 to 10% by weight, especially 0.01 to 5% by weight, based on the total amount of the cosmetic.
% By weight is preferred. If the amount is less than 0.001% by weight, the effect of preventing skin aging cannot be sufficiently exhibited. Also, 1
Even when the amount is more than 0% by weight, no further improvement in the effect of preventing skin aging is observed.

The higher fatty acid soap having 12 to 18 carbon atoms used in the present invention includes lauric acid, myristic acid, palmitic acid, oleic acid, stearic acid, coconut oil fatty acid, sodium, potassium, triethanolamine salts of tallow fatty acid and the like. The compounding amount is 5 to 40% by weight, preferably 10 to 30% by weight. If the amount is less than 5% by weight, the intended effect cannot be obtained, and if it exceeds 40% by weight, safety is impaired.

[0008] The skin cleanser of the present invention can be in various forms, such as solid, paste, liquid, gel, and foam using a foam discharge container. As long as the effects of the invention are not impaired, known components (bases, dyes, fragrances, preservatives, nonionic surfactants,
Anionic surfactants, cationic surfactants, amphoteric surfactants, pigments, antioxidants, etc.).

[0009]

EXAMPLES Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto. Unless otherwise specified, [%] indicates [% by weight]. The cleaning agents shown in Table 1 were prepared, and the skin aging prevention effect (keratin improvement effect, beautiful skin effect) was evaluated. The evaluation method will be described.

[0010] 1. Keratin Improvement Effect Test For 20 middle-aged and elderly subjects, the skin is washed for 4 weeks in each of Examples 1 to 4 and Comparative Examples 1 to 3. A scotch tape was adhered to the skin of the test area before and after the start of the test, and when the scotch tape was peeled off, the state of the keratinocytes adhered to the tape was examined in detail by a scanning electron microscope. Classify stratum corneum detachment,
The number of persons judged as “effective” and “slightly effective” is shown. <Criterion criteria> Evaluation point 1: No scale is recognized Evaluation point 2: Small scale scattered Evaluation point 3: Small to medium scale remarkable Evaluation point 4: Large scale remarkable <Criterion> Evaluation point is lower than before test start +2 or more: Effective evaluation point +1: Slightly effective Evaluation point ± 0: No effect

2. Beautiful skin effect test Female subjects complaining of rough and dry skin (30s-50s)
Once a day for 20 people with the cleaning agent of Example 1 and Comparative Example 1 3
After three months of use, the effect after three months was evaluated. The test results were indicated by the number of respondents in five steps for each item of skin wettability, flexibility, and elasticity.

[0012]

[Table 1]

[0013]

[Table 2]

Example 5 (Body shampoo) Ingredients Compounding amount (%) Birch extract 1.5 Potassium laurate 20.0 Potassium myristate 10.0 10.0 3-butylene glycol 5.0 Coconut oil fatty acid diethanolamide 3 0.0 Methyl paraoxybenzoate 0.1 Perfume 0.2 Purified water Remainder Total 100.0 The above components were uniformly heated and dissolved, mixed, and a body shampoo was prepared and evaluated.

Example 6 (facial cleansing agent) Ingredients Content (%) Birch extract 0.5 Potassium laurate 5.0 Potassium myristate 15.0 Potassium palmitate 10.0 Potassium stearate 10.0 Polyethylene glycol 5 2.0 coconut oil fatty acid diethanolamide 2.0 polyoxyethylene coconut oil fatty acid glyceryl 1.0 concentrated glycerin 10.0 methyl peroxybenzoate 0.1 fragrance 0.2 purified water balance total 100.0 The above components are uniformly heated By dissolving and mixing, a face wash was prepared and evaluated. These Examples 5 and 6 were also found to be excellent in the effect of preventing skin aging as in the other Examples.

[0016]

Industrial Applicability The present invention is intended to promote the proliferation and differentiation of epidermal cells,
It has the effect of promoting the turnover of the stratum corneum, improving the stratum corneum, beautiful skin, etc., improving the skin function and exerting an excellent effect in preventing skin aging.

Claims (1)

[Claims] A skin cleanser comprising a birch plant extract and / or alder plant extract of the birch family, and a higher fatty acid soap having a total carbon number of 12 to 18.