JPH04279510A - Cosmetic - Google Patents

Abstract

PURPOSE:To obtain a cosmetic effective for preventing chapped skin and improving the luster of skin by using an active component consisting of the extract of Pyrrosia lingua which is known to be from old times as a herb drug having diuretic action. CONSTITUTION:Easily available dried whole grass of Pyrrosia lingua is extracted by stirring and heating in a water-soluble organic solvent (e.g. ethanol) or an aqueous solution of the organic solvent, the extract is filtered and the filtrate is used as a raw material for the objective cosmetic. The cosmetic containing the extract of Pyrrosia lingua is effective for preventing chapped skin, moisturizing the skin, suppressing the aging of skin and keeping the fresh skin. The extract exhibits active oxygen suppressing effect.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cosmetics that prevent rough skin and improve skin luster.

0002

[Prior art] The scientific name for single leaf is Pyrrosia.
lingua Farwell (Cyclophor
us lingua Desv. ) It is a plant of the phylum Odontophyta, subclass Saccharidae, order Pteroptera, family Aurabaceae, and genus Aphinidae, found in the humid regions of Honshu, southern Kanto, Ryukyu, southern Korea, Taiwan, southern China, and Indochina. Distributed on rocks, slopes, and at the base of trees.

[0003] It has been used internally for medicinal purposes since ancient times, and when the dried whole plant is infused and drunk, it has a diuretic effect and is effective for swelling, swelling, itchiness, and kidney disease. However, the single leaf has not been used in cosmetics until now, and only the rhizome of Hakamauraboshi, which also belongs to the family Uraboshiceae, has been used as a hair growth promoter.

0004

[Problems to be Solved by the Invention] An object of the present invention is to find ingredients that are effective in preventing skin roughness, moisturizing the skin, suppressing skin aging, and maintaining youthful skin. Furthermore, it is an object of the present invention to find this ingredient among natural products, especially cosmetic raw materials that are easily harvested plants and are guaranteed to be highly safe for human skin, and to provide a cosmetic containing this ingredient.

[0005]

[Means for Solving the Problem] As a result of intensive research on various plants, the present inventors have found that extracts from dried whole plants with single leaves contain substances that are effective as cosmetics. Heading, the invention was completed. That is, the present invention is a cosmetic containing a single leaf extract.

[0006] Single-leaf dried whole plants are commercially available. In addition, it grows in clusters south of the southern Kanto region of Japan, and as it is an easily available plant, it satisfies the requirements as a cosmetic raw material. To extract an effective substance, a single leaf is collected and dried, or a dried commercial product is used and extracted with a water-soluble organic solvent such as ethanol, methanol, acetone, etc.

[0007] Ethanol is optimal for using the extract itself as a raw material for cosmetics. Further, during extraction, water may be added to a water-soluble organic solvent to extract with an aqueous solution, but the amount of water is preferably 60% by weight or less. In order to extract efficiently in a short time, the extract is stirred, heated, and filtered, and the resulting liquid is used as a raw material for cosmetics.

[0008] Depending on the dosage form of the cosmetic, this extract may be dried and used as a powder. The ethanol extract of a single leaf can be obtained in an amount of 0.00001 to 5% by weight of the dried whole plant of a single leaf, although it varies in terms of solid matter. This extract or powder is blended into cosmetics, but care must be taken in the case of lotions, as they tend to form precipitates when the ethanol concentration is low. There are no other problems in formulation, and it can be incorporated into creams, packs, emulsions, etc. The amount incorporated into cosmetics is preferably in the range of 0.0001 to 0.5% by weight, considering both effectiveness and economy.

[0009]

[Action] It is not yet clear what components in the single leaf extract are effective. As described later, the effectiveness of this extract was confirmed by the active oxygen suppressing effect and the sensory test based on actual use.

0010

EXAMPLES The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited to these Examples. (Production example) For 10g of dried whole plant with one leaf, 50
100 ml of wt% ethanol was added and stirred for 12 hours. This extract was filtered and the extract was used as a raw material.

(Example 1) Cream A


(Weight%) Squalane

25.0% olive oil
5
．． 0% jojoba oil

3.0% beeswax

2.
0% Setanol

3.0% Glyceryl monostearate
2.0% Sorbitan monostearate
3.0% B purified water

31.0% polyoxyethylene (20 E.O.) sorbitan monostearate
5.0% polyoxyethylene (60 E.O.
．． ) hydrogenated castor oil
1.0% glycerin

5.0% 1,3 butylene glycol
5.0% Production example single leaf extract
10.0%

[
(Example 2) Lotion purified water

65.0% ethanol

20.0%
Production example of one-leaf extract
15.0
%

(Comparative Example 1) The one leaf extract in the production example of Example 1 was replaced with purified water. (Comparative Example 2) The one leaf extract in the production example of Example 2 was replaced with purified water. thing

(Example 2 by measurement of active oxygen suppression ability)
, Evaluation of Comparative Example 2) The active oxygen suppressing ability was measured by the nitro blue tetrazolium method. The sample was once evaporated to dryness, ground in a mortar, and made up to its original volume with purified water. There is 21% oxygen in the atmosphere, and without it no living things (except anaerobic ones) could exist. However, oxygen becomes active oxygen under the influence of ultraviolet rays, enzymes, etc. Active oxygen oxidizes fatty acids and generates peroxides. It also oxidizes phospholipids in the biological membranes of living organisms, causing damage. Additionally, the generated peroxides and active oxygen are said to damage DNA and accelerate aging. It also affects the ability to produce melanin from tyrosine and is involved in the darkening of the skin. Suppressing this active oxygen is important for the skin, in other words, it is one of the important elements required for cosmetics. There are various methods to measure the effect of suppressing active oxygen, but this time we used the following method.

pH 7.8, 50mM potassium phosphate buffer
133ml
(1.3mM DETAPA
(containing C) 40 units/ml 5 ml of the above potassium phosphate buffer for catalase
2mM Nitroblue Tetrazolium in the above potassium phosphate buffer 5ml 1.8mM xanthine in the above potassium phosphate buffer
17ml


(+

Total: 160ml 2.4ml of the above reagent mixture, 0.3ml of sample
In addition, xanthine oxynase (preliminarily use the sample as water and adjust it with the above potassium phosphate buffer so that the absorbance increases by around 0.02 per minute when conducting the experiment)
0.3 ml of the solution was added and the absorbance (560 nm) was immediately measured. Measurements are made in 2nd quartiles to confirm linearity. Calculation formula As a result of this measurement, the concentration for inhibiting active oxygen production by 50% was 1.6% in Example 2, and 1.6% in Comparative Example 2. Even with the undiluted solution, there was no inhibition of 50%.

(Sensory Test) Regarding the above Examples and Comparative Examples, 20 women were divided into left and right faces and used Example 1 and Comparative Example 1, and Example 2 and Comparative Example 2 for 3 months. (Evaluation criteria) Good Bad Very large difference +4 -4 Large difference
+3 -3 difference
+2 -2 There is a slight difference +1 -1 There is no difference
0 0 This total value is shown in Table 1.

[0017]

[Table 1]

[0018]

[Effects of the Invention] It has been found that a cosmetic containing a single leaf extract is effective in preventing skin roughness, improving skin luster, and keeping skin youthful.

Claims (1)

[Claims] [Claim 1] A cosmetic containing a single leaf extract.