JP2514651B2 - Skin cosmetics - Google Patents

Description

TECHNICAL FIELD The present invention relates to a skin cosmetic. More specifically, it is a skin cosmetic containing a component in which an extract obtained from a biologically difficult-to-decompose organic substance is made water-soluble, imparting skin nutrition, beautification and flexibility to the skin, elasticity, and freshness.
The present invention relates to a basic cosmetic product for keeping smooth and healthy skin.

[Conventional technology]

Conventionally, skin cosmetics, especially basic cosmetics, apply cosmetics containing appropriate lipids and water to the skin surface for the purpose of skin nutrition and beautification to form a protective film on the skin surface and prevent evaporation of water. In addition, it holds a proper amount of lipid on the surface of the skin to form smooth and soft skin, and protects the skin from the external environment, that is, environmental outdoor sports (tennis, golf, skis, etc.) due to the spread of air pollution heating and cooling equipment. It protects the skin from the external environment by applying makeup. However, the essential role of the basic cosmetics is, in particular, moisture in the stratum corneum of the skin, usually 10 to
It is said that the behavior of 30% by weight of water in the stratum corneum governs the elasticity and softness of the skin, and how to control this is an important role of this basic cosmetic.

The regulation is 10 to 30% by weight existing in this stratum corneum.
It is to retain water, specifically to prevent evaporation of this water and to promote water supply and secretion. Originally, it is said that the human body naturally possesses it as a natural activity, and as a result of various studies, it has been revealed that it is a synergistic action of chemical substances in the stratum corneum. The substances that normally maintain the release, absorption, penetration, and retention actions of liquids and gases in the stratum corneum are keratin, lipoids (lipids), and hygroscopic water-soluble substances. It is said that this hygroscopic water-soluble substance (hereinafter referred to as Na
tural Moisturizing Factor (NMF) is said to be dominant. That is, the main cause of rough skin is this NM
It is said that there is a shortage of F. Specifically, firstly, when the NMF is removed from the stratum corneum, the stratum corneum loses its hygroscopicity, and the above-mentioned balance of water content of 10 to 30% by weight is lost, and the water absorbing ability is further lost. The component composition of the NMF includes amino acids, pyrrolidone carboxylate, lactic acid, urea, ammonia, uric acid, glucosamine, creatinine, citrate, sodium, potassium, calcium, magnesium and other metals, sugars, organic acids, peptides, etc. It is clarified that it is made up of substances. In this way, the stratum corneum from which this NMF has been lost for some reason loses its ability to absorb water and becomes a so-called dry skin, and the skin loses elasticity and causes various disorders. In No. 2, there is a so-called barrier layer (defense layer) that protects the moisture absorption component from volatilization of the retained water of 10 to 30% by weight from the skin surface. There are various theories about the function of this barrier layer, but this is not a specific layer that exists in a part of the stratum corneum, but a complex composed of a hydrophilic substance containing lipids, proteins and NMF. That is, the entire stratum corneum, including sebum components and cellular lipids, plays a role of a barrier layer and plays the role of water sieber. Incidentally, the composition components of sebum secreted from the sebaceous glands in this are squalene, wax ester, cholesterol,
Examples include cholesterol ester, triglyceride, diglyceride, monoglyceride, free fatty acid, paraffin and the like.

That is, normal skin can be said to be how to secure the retention of water in the skin. That is, firstly, it depends on how to prevent hydrophilic components such as NMF having a high hygroscopic property and moisture retention from flowing out, and secondly, how to seal components such as sebum components and cell lipids. In the above-mentioned meaning, the role of basic cosmetics is, firstly, in the case of normal skin, when this moisturizing mechanism is temporarily collapsed, for example, when sebum is removed temporarily by washing the face, etc. It can be said that it is to supplement the sebum until the recovery, and to reduce this temporary extreme difference in skin activity as much as possible. Secondly, the youthfulness and beauty of the skin is maintained by the secretion of sebum, and such secretion of sebum in the human body is large during the growth period and gradually decreases during adulthood, and is particularly low during the old age. There are generally fewer women than men.

According to the measurement of Green, etc., the lower extremity in each part of the human body has the least amount of secretion, which is about 1/80 of the most amount in the forehead. In addition, even in the same face, the cheek area is about one third of the forehead area, and the skin in the area where these secretions are small has a tendency to dry easily. [RS Greene et al; J. Innes
t Permatol., 54 , 240 (1970)] Therefore, it can be said that it is most natural and preferable to raise the secretion of sebum for beautifying and health of the skin of women after middle age when the amount of sebum secretion decreases. .

In this sense, components such as γ-oryzanol, pantethine fatty acid ester and branched fatty acid cholesteryl ester have been conventionally blended in cosmetics. Then, this component forms a kind of barrier layer on the stratum corneum, and prevents the evaporation of 10 to 30% by weight of moisture present in this stratum corneum and actively secretes sebum. Is to promote. Thirdly, there is a way of thinking when considering the route of water evaporation from the surface of the skin. There are two possible transpiration pathways from the sweat gland and the surface of the stratum corneum. From the sweat gland, water vapor constantly evaporates in an invisible form, which is insensitive sweating and moisture from the skin surface. It is said that 4/5 of transpiration is equivalent to this, and the remaining 1/5 is transpiration from the general stratum corneum surface.

There is a kind of barrier membrane at the boundary between the stratum corneum and the living cell layer below, and at the part of the transparent layer, which restricts the entry and exit of water and other substances. Ie yes This is one of the reasons why the water in the stratum corneum or Malpighian layer does not evaporate excessively through the stratum corneum, but it is considered that the sebum on the epidermis secondarily regulates the evaporation of skin moisture. It actively seeks to promote the secretion of sebum.

Fourthly, the NMF component, which is the dominant factor for the regulation of water content in the stratum corneum, is positively replenished.

That is, the conventional basic cosmetics have a good oily component and a moisturizing property when the natural skin moisturizing mechanism is out of balance due to various external conditions or intrinsic conditions and it becomes difficult to maintain normal skin. It played a role of lightening the burden on the skin by giving a highly hydrophilic hydrophilic substance to the skin in a well-balanced manner.

[Problems to be solved by the invention]

However, in these conventional basic cosmetics, as described above, when the natural skin moisturizing mechanism is out of balance due to various external conditions or intrinsic conditions, a good oily component and a hydrophilic substance having high moisturizing property are balanced. The reality is that it is not out of the scope of the passive treatment of giving well and reducing the burden of returning to the original metabolism of the skin.

In addition, a cosmetic composition containing a skin secretagogue has not been satisfactory yet.

In particular, even when the action of promoting sebum secretion is recognized, it is not without drawbacks such as the promotion of acne, for example, due to continued use depending on the individual characteristics and constitution of the user.

Furthermore, in terms of promoting metabolism as a whole, if the efficacy effect, which should be originally intended as a cosmetic product, is too strong, secondary effects are promoted, which is not preferable. Further, it is not preferable to add an artificially synthesized component, because there are still many unknown parts in its action.

Therefore, the present inventor positively replenishes the fourth NMF component or a similar component among the various factors for retaining moisture in the stratum corneum described above, and prevents evaporation of moisture, which is a secondary role of the sebum component. It is believed that the combination with and is effective for beautifying the skin, imparting flexibility and elasticity, and has completed the present invention through intensive research and study.

That is, it is an object of the present invention to provide a basic cosmetic for the purpose of imparting skin nourishment, beautification, and softness and elasticity to the skin to keep the skin fresh and smooth and healthy.

[Means for solving problems]

The constitution of the present invention is a skin cosmetic characterized in that an extract extracted from a biologically difficult-to-decompose organic substance by a supercritical gas extraction method is added as an active ingredient.

The biologically persistent organic substance used in the present invention refers to persistent organic substances not only in the soil but also in more general biogenic origins such as humic substances which have long been called in the field of soil science. , For example, biologically persistent organic substances distributed throughout land, sea, rivers, lakes and their waters and throughout the globe.

Among them, as will be described later, from the viewpoints of the content of the extract components, the extraction method, the extraction efficiency, the abundance of raw material resources, the ease of handling, etc., the soil organic matter, that is, the crude humus type, the mul type, and the intermediate moder Terrestrial rot plant, which is said to be
It is preferable to use low-grade peat, intermediate peat, high-grade peat, semi-terrestrial rot plants such as black mud, and aquatic rot plants as raw materials, and among these, particularly preferred are semi-terrestrial rot plants. Of the rot plants, low peat is most preferred.

The extraction method for obtaining the extract used in the present invention is a supercritical gas extraction method. Distillation, which is known as an ordinary extraction method, has a drawback that the lower the vapor pressure of the substance to be separated, the more the mixture of substances to be separated has to be heated to a higher temperature, and the vacuum distillation is also known. The application of C.sub.2 expands its range of use, but only increases its boiling range to about 100-150.degree. In that respect, the supercritical gas extraction method described below is an effective method because the mixture quality can be extracted and separated by a simple method.

Further, as a conventionally known extraction method, a solvent extraction method such as water, various alcohols, various hydrocarbons, an aqueous solution of caustic soda, an aqueous solution of acid, etc. could not obtain the extract component containing the moisturizing component required in the present invention. This is because the moisturizing component was not selectively extracted or even if it was extracted a little,
It is considered that the other components having no moisturizing component were extracted in a larger amount and the content of the moisturizing component was diluted.

The supercritical gas extraction method is an extraction technology that uses a supercritical gas as a solvent, and is an extraction method that combines the features of conventional elemental separation technology, such as distillation and liquid-liquid extraction, and a new separation technology with wide applicability. Has been attracting attention. Here, the supercritical gas means a gas in a state in which the temperature exceeds a critical temperature at which gas and liquid can coexist, and is a high-density liquid that cannot be properly called a gas or a liquid. Therefore, the supercritical gas extraction may be referred to as supercritical fluid extraction or high-density gas extraction.

 Next, the principle of supercritical gas extraction will be briefly described.

1) Features near the critical point The existence of the critical point is a major feature of a substance, and the following phenomena are observed in the vicinity of it.

Its main feature is that the gas density near the critical point is similar to that of liquids,
Viscosity is about several times that of ordinary gas.

 On the other hand, the diffusion coefficient is about 100 times larger than that of liquid.

Near the critical point, the density change with the pressure change is remarkable.

2) Principle of supercritical gas extraction It is a major feature that the density changes abruptly with a slight pressure change near the critical point as described above.

That is, with respect to the supercritical gas slightly above the critical temperature, the solubility and pressure of the target component to be extracted increase exponentially as the pressure increases. Since the gas phase density increases rapidly with increasing pressure, the solubility of the solute, which is the component of interest for extraction, increases rapidly in the region above the critical pressure. On the contrary, this means that if the pressure is reduced, the solubility in the supercritical gas can be drastically reduced, and it is possible to separate the solute and the extraction medium (supercritical gas) simply by decompressing. Show. That is, as shown in FIG. 1, the solute may be extracted in a high pressure type extraction tank and separated from the extraction medium in a low pressure type separation tank. Alternatively, the temperature of the separation tank can be raised to lower the density of the gas, and the solubility can be reduced to separate it from the extraction medium. Also, the use of an adsorbent that adsorbs solutes well or the inertness that lowers the solubility It may be possible to facilitate the separation from the extraction medium by mixing the gas.

As described above, in the supercritical gas extraction process, one of the great advantages is that evaporation latent heat energy is not required for dissolution and recovery, and that gas components as an extraction medium hardly remain in the extract. Next, regarding the operating conditions of the supercritical gas extraction method, the temperature varies depending on the type of the supercritical gas used, but the temperature is in the temperature range of −100 to + 300 ° C., preferably in the range of 0 to 200 ° C. Is advantageous, and basically, the higher the pressure, the better, but practically up to about 1000 atm is preferable, and this condition is determined from operational problems, extraction efficiency, energy balance and the like. As the type of supercritical gas, inorganic gas or saturated or unsaturated lower hydrocarbon compound is used. Typical examples of this are carbon dioxide as the inorganic gas, methane, ethane, propane, butane, ethylene, propylene as the saturated or unsaturated lower hydrocarbon compounds and the corresponding halogenated hydrocarbon compounds derived therefrom, for example chlorocarbons. It is a hydrogen compound or a fluorohydrocarbon compound. However, inorganic gas, especially carbon dioxide, is most preferable because it has no effect on the human body, is inert, has no problem in terms of resources, and is inexpensive.

The extraction method for obtaining the extract of biologically difficult-to-decompose organic matter used in the present invention will be described in detail below. First, on the basis of the principle as described above, the present inventor temperature is room temperature to 100 ℃,
Preferably 20 to 60 ° C. and pressure 10 to 1000 kg / cm ² preferably
Biologically persistent organic substances were extracted using carbon dioxide in the supercritical state of 200-700 kg / cm ² . The results will be described.

First, the biologically persistent organic matter used in this experiment is typically peat, which is a biologically persistent organic matter obtained from the ground at a depth of 4 m from the surface of the Kamisarobetsu wilderness in Tomi-cho, Teshio-gun, Hokkaido. Is. The extraction method using the supercritical gas extraction / separation system shown in FIG. 1 as a raw material for extraction will be described. Peat is placed in the extraction tank 1. The extraction tank 1 is a usual packed column used in the chemical industry, which is packed with packing materials such as Raschig rings, glass balls, and stainless steel spiral wires, and a packing plate is attached to the entrance and exit of the packed column. The peat becomes a thin film with a large surface area as it flows down through the packing. The carbon dioxide comes into contact with the surface of the thin film of peat on the packing fed into the bottom of the extraction tank 1 by the pump from the cylinder 3 in a supercritical state of temperature and pressure.

The carbon dioxide containing the peat extract is sent to the separation tower 2 taken out from the top of the extraction tank 1. In the separation tower, the pressure-reduced carbon dioxide is taken out from above and circulated to the bottom of the extraction tank by a pump.

 The results of this experiment are summarized in Table 1.

The extract component extracted from these peat is a solid that exhibits a color from ocher to dark brown, and as a result of analysis and analysis by an analytical instrument such as infrared spectrophotometer, elemental analysis and nuclear magnetic resonance, the skeleton of the molecule is It has a relatively aliphatic form having 20 or more carbon atoms, and has a carboxyl group and a phenolic hydroxyl group in the molecule,
In addition, it contained a nitrogen content presumed to be of amino acid or protein type. As means for making these extract components extracted from this peat water-soluble, a monovalent cation may be reacted with the extracted extract components under appropriate conditions, or an acid or polyvalent compound may be added under appropriate conditions. It is obtained by reacting alcohol, alkylene oxide or the like.

Lithium, sodium, potassium, ammonium and the like are suitable as the former cation, and one or more of these cations are reacted with the extract to obtain a water-soluble product of the target extract.

Specifically, for example, in order to obtain the sodium salt of the extract, the extract is stirred while being dispersed in water, and an aqueous sodium hydroxide solution is added to the mixture for reaction. According to the purpose of use, the water-soluble solution is used as it is, or the water-soluble solution is dried to obtain the water-soluble salt of the extract. As the acid in the latter case for obtaining the water-soluble substance, sulfuric acid, anhydrous sulfuric acid, fuming sulfuric acid, chlorosulfonic acid, sulfamic acid, phosphoric acid, phosphorus pentoxide, phosphorus oxychloride, phosphorus trichloride, etc. are used. . Further, as the polyhydric alcohol, sorbitol, polyethylene glycol,
Polyvinyl alcohol or the like is used, and as the alkylene oxide, ethylene oxide, propylene oxide or the like is used.

As a means for making the above-mentioned extracted extract components water-soluble, the former method of reacting with the cation is preferable from the viewpoint of reactivity, easiness in operation and the like.

The skin cosmetic of the present invention may contain one or more water-soluble substances of the extract, and the total amount of the water-soluble substances of these extracts is 0.01 to 15% by weight in the cosmetic.
(Hereinafter, unless otherwise specified, weight% is simply referred to as%), and preferably in the range of 0.05 to 10%. If it is less than 0.01%, a sufficient moisture retaining and absorbing effect cannot be obtained, which is not preferable.
In addition, the upper limit is not particularly limited, but even if a large amount is blended, not only the moisturizing and water-absorbing effect will reach a ceiling, but it will be difficult to adjust the color tone of the cosmetics. It is preferable to appropriately determine the blending amount.

In the cosmetic of the present invention, in addition to the above-mentioned essential components, if necessary, depending on the type of cosmetic, oil, water, a surfactant, a moisturizer, an alcohol, a thickener, an antioxidant, a chelating agent, Ingredients usually used in cosmetics such as dyes, preservatives and antifungal agents can be added. Further, the dosage form of the present invention is arbitrary, and it is used for various basic cosmetics such as lotion, emulsion and cream.

〔Example〕

Next, the present invention will be specifically described with reference to Examples and Comparative Examples. The present invention is not limited to this. The compounding standard is shown by weight% unless otherwise specified.

Example 1 A 1% aqueous solution of sodium water-soluble salt of the extracted extract component obtained by reacting the extracted extract component obtained by the supercritical gas pouring method using peat as a raw material, with a caustic soda aqueous solution,
Apply 0.2 ml of this to 2 ^cm x 2 ^cm paper, and keep it at 25 ℃ and humidity of 50
The water evaporation rate in% was assumed from the change in the weight of the paper. Further, as Comparative Example-1, the evaporation rate of water was measured in accordance with Example 1 using only pure water containing no extract component.

The measurement results of Example-1 and Comparative Example-1 are shown in Table-2. From this result, it can be seen that the evaporation rate of water is suppressed in the aqueous sodium salt solution of the extract component extracted from peat, and the sodium salt of the extract component has a moisturizing effect or a water evaporation suppressing effect.

Examples 2-10, Comparative Examples 2-10 As Examples 2-10, cosmetic creams were prepared by blending the sodium salt of the extract component extracted from the peat obtained in Example 1.

Example 2 (Composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-arginine 0.5 peat extract component sodium salt 1.0 Water balance 100.0 Example-3 is (composition) monocetyl phosphate 1.0 (%) lipophilic glycerin monostearate 2.5 2-octyldodecyl myristate 30.0 butylparaben 0.1 methylparaben 0.1 propyleneglycol 6.0 L-arginine 0.5 peat extract extract sodium salt 0.5 water Remaining amount 100.0 Example-4 is (composition) Monocetyl phosphoric acid 1.0 (%) Lipophilic glyceryl monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-Arginine 0.5 Mud Coal extract component sodium salt 0.1 Water Balance 100.0 Example -5 (composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L- arginine 0.5 peat extract component sodium salt 5.0 water Balance 100.0 example -6 (composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 butylparaben 0.1 methylparaben 0.1 propylene glycol 6.0 in L- arginine 0.5 peat extract component sodium salt 0.05 water Balance 100.0 example -7 example -1, using a potassium hydroxide aqueous solution instead of the aqueous sodium hydroxide solution and the other in the same manner, 1% potassium water-soluble salt An aqueous solution was prepared.

(Composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-arginine 0.5 peat extract component sodium salt 1.0 Water Balance 100.0 Example - 8 Again, the same sodium salt of the peat extract component as in Example-1 was used. The same applies hereinafter.

(Composition) self-emulsifying glyceryl monostearate 1.5 (%) lipophilic glycerin monostearate 2.0 acetyl alcohol 4.0 Vaseline 4.0 Squalane 7.0 peat extract component sodium salt 1.0 Glycerin 5.0 Methylparaben 0.1 butyl paraben 0.1 Water Balance 100.0 Example - 9 (composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 butylparaben 0.1 methylparaben 0.1 propylene glycol 6.0 L-arginine 0.5 peat extract component sodium salt 10.0 water Balance 100.0 exemplary Example-10 is (composition) monocetyl phosphate 1.0 (%) lipophilic glyceryl monostearate 2.5 2-octyldodecyl myristate 30.0 butylparaben 0.1 methylparaben 0.1 propylene glycol 6.0 L-arginine 0.5 peat extract The kiss ingredients sodium salt 15.0 Water Balance 100.0, as a comparative example 2-3, Comparative Example 2 was prepared cosmetic cream of the following composition in which the sodium salt of peat extract obtained was 0.005% formulation in Example 1 .

(Composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-arginine 0.5 peat extract component sodium salt 0.005 Water Balance 100.0 Comparative Example 3 Prepared a cosmetic cream having the following composition.

(Composition) Monosechirurin acid 1.0 (%) The lipophilic glycerin monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-arginine 0.5 Water balance 100.0, as a comparative example 4-10, Comparative Example 4 is water as an extraction solvent, Comparative example 5 is ethanol, Comparative example 6 is methanol, Comparative example 7 is isopropyl alcohol, Comparative example 8 is n-hexane, and Comparative example 9 is 0.1N caustic soda solution. Comparative Example 10 was an extraction extract from peat under the extraction conditions shown in Table 3 by a solvent extraction method using a 5% nitric acid aqueous solution,
The extracted extract thus obtained was converted to a sodium salt according to Example 1. The extraction conditions and the extraction results are shown in Table-3.

Further, a cosmetic cream having the following composition was prepared by using a fixed amount of each of the sodium salts of the solvent-extracted extract components obtained in Comparative Examples 4 to 10.

Comparative Example 4 (Composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-arginine 0.5 peat extract component sodium salt 1.0 water remainder by water Amount 100.0 Comparative Example 5 (Composition) Monocetyl phosphate 1.0 (%) Lipophilic glyceryl monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-Arginine 0.5 Ethanol peat extract extract sodium salt with ethanol 1.0
Water Balance 100.0 Comparative Example 6 (Composition) Monosechirurin acid 1.0 (%) Peat extract component sodium by lipophilic glycerin monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-arginine 0.5 Methanol Salt 1.0
Water Balance 100.0 Comparative Example 7 (Composition) Monosechirurin acid 1.0 (%) Peat extract component by lipophilic glycerin monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 Propylene glycol 6.0 L-arginine 0.5 Isopropyl alcohol with sodium salt 1.0 water Balance 100.0 Comparative example 8 (composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 butylparaben 0.1 methylparaben 0.1 propylene glycol 6.0 L-arginine 0.5 n-hexane Peat extract extract component sodium salt 1.
0 Water Balance 100.0 Comparative Example 9 (Composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 Butylparaben 0.1 Methylparaben 0.1 peat with propylene glycol 6.0 L-Arginine 0.5 0.1 N sodium hydroxide aqueous solution extract components sodium salt 1.0 water Balance 100.0 Comparative example 10 (composition) Monosechirurin acid 1.0 (%) lipophilic glycerol monostearate 2.5 2-octyldodecyl myristate 30.0 butylparaben 0.1 methylparaben 0.1 propylene glycol 6.0 L-arginine 0.5 5 % Peat Extract Extraction Component Sodium Salt with Nitric Acid Solution
1.0 Water Balance 100.0 Example -11 peat extract component of the skin in its moisture of the water-soluble salts, water absorption effects.

The moisturizing ability of each of the cosmetic creams formulated according to Examples 2 to 10 and Comparative Examples 2 to 10 was measured using the following skin keratin water content measuring device, and the results are shown in Table 4.

(Measurement device for keratin water content on skin surface) ・ MODEL SKIDON-200 ・ Product made by IBS Co., Ltd. ・ Setting place Constant temperature and humidity chamber 20 ℃ × HR60% (Measurement method for keratin water content on skin surface) Method of displaying results A) Outline This device is a device that easily and quickly measures the high-frequency conductance of the stratum corneum of the epidermis based on the change in Q of the tuning circuit. Specifically, it does not measure the moisture content of the stratum corneum, but the ease of passing electricity through the stratum corneum, that is, the conductivity of the stratum corneum depends on the amount of moisture contained in the stratum corneum, especially this is the surface layer, This is an application that correlates well with the amount of water in the stratum corneum.

B) Measurement method a. A 2 ^cm x 2 ^cm part of the forearm flexion side of a 24-year-old man was enclosed and used as a test site.

b. The forearm flexion side was washed with normal soap.

c. Enter the constant temperature and humidity set in the measuring instrument SKICON-200, and after 2 hours, measure the water content of the test part (referred to as blank).

d. The measuring method was based on the instruction manual of SKICON-200.

e. To the test area (4 cm ² ), 10 μl of each cream or the like obtained according to the present invention was applied.

f. About 10 seconds, 1 minute, 5 minutes, 10 minutes, 15 immediately after applying various creams
After 5 minutes, 30 minutes, 45 minutes, and 60 minutes, the water content on the skin surface keratin was measured at 5 points within 4 cm ^{2 of} the test area, and the average value was obtained.

g. The measurement result display method is the μ displayed on the SKICON-200.
This was done using digital values in Ω.

The blank value in this device was in the range of 5 to 20.
The results are shown in Table-4.

[Effects of the Invention] The skin cosmetic of the present invention has improved skin moisture absorption and absorption ability by incorporating a water-soluble salt of an extract of a biologically difficult-to-decompose organic substance as shown in Examples. Perhaps because the amino acids, higher fatty acid ester compounds, etc. contained in the extracted extract component have moisturizing properties, they give the skin gloss and give a smooth sensation, and lead to healthy skin. It is a skin cosmetic having.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a supercritical gas extraction separation system, in which 1 is an extraction tank, 2 is a separation tank, 3 is a carbon dioxide cylinder,
4 is cooling water, warm water, 5 is cooling water, 6 is a heat exchanger, 7 is a filter, and 8 is a compressor.

Claims (1)

(57) [Claims] 1. A skin cosmetic comprising an extract extracted from a biologically difficult-to-decompose organic substance by a supercritical gas extraction method as an active ingredient.