KR20120000251A - Cosmetic composition containing kelp extract - Google Patents

Abstract

The present invention relates to a skin moisturizing cosmetic composition comprising a kelp extract as an active ingredient. Specifically, since the kelp extract of the present invention has an excellent moisturizing effect, not only the skin aging prevention and wrinkle improvement effect is recognized, but also the problem of side effects by using a natural substance as an active ingredient, the kelp extract effective The cosmetic composition containing the component is recognized for its excellent skin moisturizing effect.

Description

Cosmetic composition containing a seaweed extract {A COSMETIC COMPOSITION COMPRISING LAMINARIA JAPONICA}

The present invention relates to a cosmetic composition having a moisturizing effect.

Human skin becomes sensitive due to changes in the environment, stress caused by internal factors, stimuli caused by external factors, and the like, and water retention may be lowered. In this case, various skin problems may occur. In particular, when the moisture retention of the skin is lowered with respect to the progress of aging, the skin may become dry, less elastic, more wrinkles are generated, and the skin color may change to a dull color. In addition, when the skin's moisture retention is reduced, it is easily sensitive to external weak stimuli and takes a long time to recover.

In addition, dermatologically, the most important role of the skin is a barrier function to prevent the loss of biological components such as water, electrolytes and at the same time prevent harmful substances from the outside environment into the skin. In other words, while the skin is exposed to a much drier external environment than in vivo, it plays an important role as a protective film to protect the living body from the external environment. In particular, the outermost stratum corneum of skin in direct contact with the external environment prevents the invasion of physical and chemical harmful components and prevents the loss of internal moisture into the external environment that is drier than the body. The stratum corneum has a variety of functions to maintain the flexibility to retain the appropriate moisture inside the stratum corneum.

More specifically, the skin moisture is generally about 70% in the dermis and decreases toward the epidermis and is known to be about 10% to 30% in the outermost stratum corneum. Moisture supplied from the dermis is mainly diffused to the top of the stratum corneum by passive diffusion, and moisture diffused to the top of the stratum corneum is lost to the outside. This is called Trans Epidermal Water Loss (TEWL), and it is known to prevent sebum and epidermal lipids, which are lipid components of the stratum corneum.

Therefore, the moisture retention ability of the stratum corneum is important not only from the viewpoint of biological defense, but also smooth and flexible skin surface is very important from the cosmetic point of view. However, despite the role of the skin, especially the stratum corneum of the skin, the harsh external conditions such as wind, cold weather, sunlight, etc., or the stimulating factors such as face wash and shaving, and aging factors in combination This can be lost and the skin will become dry due to the loss of moisture.

Therefore, a lot of efforts have been made to solve the moisture loss of the skin which causes the skin trouble, and the representative method is to block the moisture loss of the skin as much as possible using cosmetics including natural vegetable ingredients and stimulants. It is proposed.

In the past, cosmetics, which were previously thought to be used by women, are used not only as a beauty expression tool but also as household goods for men and women of all ages, and as the industry develops, the demand for high-quality and diversification of cosmetics increases. As a result, there is a growing interest in 'functional' products that expect a particular effect or efficacy.

The functional cosmetics currently recognized in Korea are whitening products that help to whiten the skin, skin moisturizing products that help to moisturize the skin, and sunscreen products that help to burn the skin finely or protect the skin from UV rays. .

In general, such functional cosmetics are interpreted as cosmetics that affect the structure or function of the body as well as cosmetic effects, and prevent and treat. In particular, recently, as the sales proportion of functional cosmetics in the total sales of cosmetics significantly increased, researches to find new efficacy ingredients on the human body and use them effectively on the skin have been actively conducted.

In accordance with this tendency, research on the most important function of cosmetics is to limit the loss of moisture of the skin to keep the skin smooth and moist.

Specifically, cosmetics are used to make artificial membranes on the skin to prevent external irritation, to prevent moisture loss from inside the skin, and to supply a certain amount of moisture to the skin to maintain smooth and moist skin. However, humectants, such as water-soluble polyhydric alcohols, sodium pyrrolidone carboxylic acid, urea, amino acids, elastin, and the like, which are used as active ingredients in cosmetics for conventional moisturizing purposes, have respective problems. For example, in relation to the water-soluble polyhydric alcohols most commonly used as moisturizers in cosmetics, glycerin, solitol, and the like having three or more OH groups have a problem of feeling unpleasant when used due to being sticky in contrast to excellent moisturizing power. In addition, pyrrolidone carboxylic acid sodium (PCA-Na), sodium lactate (Na-lactate), or urea, which are natural moisturing factors (NMF), have strong electrolytic properties, which impair the emulsion stability of products such as cosmetics. , Amino acids, collagen, elastin, etc. also have a moisturizing ability, but the moisturizing ability was limited.

Recently, recent researches related to functional materials have been focused on natural material materials derived mainly from natural products in conjunction with environmentally friendly hot air. However, these studies focus only on the functional cosmetics mentioned above, and are limited in terms of moisturizing effects. In addition, with respect to such natural materials, research is mainly conducted on herbs or herbs used as herbal medicine, and research on seaweed is limited in some regions.

Therefore, the three sides of the sea, considering the geographical environment of Korea, which is rich in marine resources, the necessity of research on materials that can improve the moisturizing effect from marine resources including seaweed is increasing.

The present invention is to improve the problems of the prior art as described above, an object of the present invention to provide a cosmetic composition comprising a natural substance as an active ingredient.

In order to achieve the above object, the present invention provides a cosmetic composition comprising the kelp extract as an active ingredient. The cosmetic composition relates to a cosmetic composition for skin moisturizing excellent moisturizing effect.

The inventors of the present invention while researching the functionality of natural product extracts derived from natural substances that have not raised the issue of resistance or safety, in particular in consideration of the characteristics of Korea, the three sides of the sea, the seaweed extract, Unlike the eight different seaweeds that were tested, it was found to have a remarkably good skin moisturizing effect, and the kelp extract was used as a moisturizing effect as well as because it was prepared from natural substances that can be used as food additives. It has been studied that the present invention can be widely used in the cosmetics-related industry without being a problem of resistance, thereby completing the present invention.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a cosmetic composition comprising the kelp extract as an active ingredient.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a skin moisturizing cosmetic composition comprising a kelp extract as an active ingredient.

The kelp (Laminaria japonica) is a seaweed belonging to the seaweed belonging to the seaweed (Phaeophyta) Phaeophyceae kelp (Laminariales) kelp (Laminariaceae), the appearance is divided into the upper part of the leaf, stems, roots, frond is long in the shape of a band, The central part of lobe is thick middle part, and both sides of middle part are vertically flawed. Stems are usually columnar, upright, and the roots are dendritic, branching from the bottom of the stem to the tea phase. The kelp has been widely used for food in Korea, Japan and China since ancient times.

The kelp extract may be prepared according to a conventional plant extract, in particular, seaweed extract preparation method, for example by extracting by adding an extraction solvent to the stem, leaves or roots or pulverized product of kelp or extracted with an extraction solvent It may be prepared by fractionation by adding a fractional solvent to the crude extract prepared.

The extraction solvent may be at least one selected from the group consisting of water and an organic solvent. The organic solvent may be a polar solvent such as alcohol having 1 to 5 carbon atoms, the alcohol dilution water, ethyl acetate or acetone and a nonpolar solvent of ether, chloroform, benzene, hexane or dichloromethane, or a mixed solvent thereof. The alcohol having 1 to 5 carbon atoms may be a dihydric alcohol such as ethylene glycol, propylene glycol, pinacol, or a monohydric alcohol such as methanol, ethanol, propanol, butanol, isopropanol, but is not limited thereto. In addition, the alcohol dilution water may be a dilution of monohydric alcohol or dihydric alcohol in water from 10% (v / v) to 99.9% (v / v).

Extraction solvent of the kelp extract of the present invention is preferably at least one selected from the group consisting of water, alcohol having 1 to 5 carbon atoms, alcohol dilution water and mixtures thereof, more preferably dihydric alcohol dilution water, And even more preferably 30% (v / v) to 70% (v / v) propylene glycol dilution water based on volume (v / v). Since the propylene glycol dilution water as the extraction solvent is to ensure the safety that both water and propylene glycol can be used in cosmetics, the extract has a desirable effect in that it can be added directly to cosmetics without removing the extraction solvent.

For example, the extraction process may be performed at 4 ° C. to 120 ° C., or 50 ° C. to 90 ° C., or 60 ° C. to 80 ° C., but is not limited thereto. In addition, the extraction time is not particularly limited, but may be 10 minutes to 12 hours.

Kelp extract of the present invention may be prepared according to the conventional method for producing a plant extract, specifically may be cold extraction, hot extraction, thermal extraction, ultrasonic extraction, etc., conventional extraction equipment, ultrasonic grinding extractor or fractionator It is available.

In addition, the extract extracted with the solvent may be further subjected to the fractionation process with any one solvent selected from the group consisting of hexane, methylene chloride, acetone, ethyl acetate, ethyl ether, chloroform, water and mixtures thereof. Two or more solvents may be used in the fractionation, and each solvent fraction may be prepared by sequentially using or mixing the solvent according to the polarity of the solvent.

The prepared extract or the fraction obtained by performing the fractionation process can be filtered or concentrated or dried to remove the solvent, it can be carried out both filtration, concentration and drying. Specifically, the filtration may be performed using a filter paper or a reduced pressure filter, the concentration may be concentrated under reduced pressure using a reduced pressure concentrator, for example, a rotary evaporator, and the drying may be performed by, for example, a lyophilization method.

When treating the cosmetics containing 10% of the kelp propylene glycol dilution water solvent extract of the present invention, it was confirmed that it has a remarkably excellent skin moisturizing effect compared to the case of using a cosmetic containing no solvent extract. Therefore, the kelp solvent extract is excellent in the skin moisturizing effect, because it is extracted from the kelp used for food, there is no problem related to safety and side effects, it can be used for the purpose of enhancing the skin moisturizing function in cosmetics.

The kelp extract as an active ingredient of the cosmetic composition of the present invention is not only excellent in moisturizing effect, but also remarkably excellent in that it is hypoallergenic and safe since it is a substance derived from a natural substance used for food. Therefore, the cosmetic composition of the present invention can be applied to the skin for anti-aging or anti-wrinkle by skin moisturizing and the skin moisturizing.

Therefore, the cosmetic composition of the present invention may be a cosmetic composition for skin moisturizing cosmetic composition.

The cosmetic composition may be included in the kelp extract 0.0001 to 50% by weight, preferably 0.001 to 30% by weight based on the total composition. More specifically, the content of the kelp extract should be more than the minimum value in order to achieve the skin moisturizing effect, but can be freely controlled within the above range in consideration of whether the skin irritation and decrease in the feeling of use due to excessive addition and the applicability to various formulations. In this regard, the content of the kelp extract is most preferably 10% by weight of the best moisturizing effect. At this time, the content of the active ingredient and the content of the additional component may be appropriately adjusted within the above range according to the content of the components contained in the formulation or cosmetic composition.

The cosmetic composition of the present invention may be provided for use in skin external ointments, basic cosmetics, makeup cosmetics, body cosmetics or shaving cosmetics, and the like, and examples of the basic cosmetics include essences, lotions, creams, gels, lotions, packs, massages, and the like. There may be creams, latexes, and the like, and examples of the makeup cosmetics may include foundation, lipstick, eyeshadow, eyeliner, mascara, eyebrow pencil, makeup base, and the like, and body cosmetics include soap, liquid cleaner, and bathing agent. , Sun screen cream, sun oil, and the like, and shaving cosmetics include aftershave and shaving cream.

The cosmetic composition of the present invention, in addition to containing the kelp extract as an active ingredient, may further include a substance such as a functional substance having a skin moisturizing or moisturizing effect or an excipient for improving physical properties, a diluent, and the like.

For example, the cosmetic composition may be additionally added to the perfume, pigments, fungicides, antioxidants, preservatives, moisturizers, thickeners, inorganic salts or synthetic polymer materials to improve physical properties. In addition to the blending components that may be added, it may be a fat or oil component, an emollient agent, a surfactant, an organic pigment, an inorganic pigment, an organic powder, an ultraviolet absorber, a pH adjuster, an alcohol, a blood circulation accelerator, a cooling agent, a limiting agent, or purified water.

In addition, the cosmetic composition may further include one or more selected from the group consisting of water-soluble vitamins, oil-soluble vitamins, polymer peptides, polymer polysaccharides, sphingolipids and seaweed extract.

The compounding component which may be added other than the said active ingredient is not limited to this, Any said component can be mix | blended within the range which does not impair the objective and effect of this invention.

In addition, the cosmetic composition may take the form of a solution, an emulsion, a viscous mixture, and the like, and any formulation commonly prepared in the art, for example, emulsion, cream, lotion, pack, foundation, lotion, essence, hair cosmetic, etc. It may be a formulation of.

More specifically, the cosmetic composition of the present invention is a skin lotion, skin softener, skin toner, astringent, lotion, milk lotion, moisturizing lotion, nutrition lotion, massage cream, nutrition cream, moisturizing cream, hand cream, foundation, essence, nutrition essence And formulations of packs, soaps, cleansing foams, cleansing lotions, cleansing creams, body lotions and body cleansers.

For example, when the formulation of the present invention is a paste, cream or gel, the carrier component is animal fiber, vegetable fiber, wax, paraffin, starch, trakant, cellulose derivative, polyethylene glycol, silicone, bentonite, silica, talc or zinc oxide. This can be used.

When the formulation of the present invention is a powder or spray, lactose, talc, silica, aluminum hydroxide, calcium silicate or polyamide powder may be used as the carrier component, and especially when the formulation of the present invention is a spray, additionally chlorofluoro Propellants such as rohydrocarbon, propane / butane or dimethyl ether.

When the formulation of the present invention is a solution or emulsion, a solvent, solvating agent, or emulsifying agent is used as the carrier component, such as water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, 1,3 Fatty acid esters of butylglycol oil, glycerol aliphatic ester, polyethylene glycol or sorbitan.

When the formulation of the present invention is a suspension, a carrier such as water, a liquid diluent such as ethanol or propylene glycol, a suspending agent such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, Cellulose, aluminum metahydroxide, bentonite, agar or tracant, etc. may be used.

When the formulation of the present invention is an interfacial active agent-containing cleansing, the carrier component may include aliphatic alcohol sulfate, aliphatic alcohol ether sulfate, sulfosuccinic acid monoester, isethionate, imidazolinium derivative, methyltaurate, sarcosinate, fatty acid amide Ether sulfates, alkylamidobetaines, aliphatic alcohols, fatty acid glycerides, fatty acid diethanolamides, vegetable oils, linolenic derivatives or ethoxylated glycerol fatty acid esters.

As described above, the cosmetic composition comprising the kelp extract of the present invention as an active ingredient is not only remarkably excellent moisturizing effect compared to other seaweeds, and is also manufactured from kelp, a natural substance that has been used for food in the past, thereby ensuring safety. It is also economically advantageous because it can be manufactured from materials that can be easily collected anywhere in the coast of Korea due to the characteristics of Korea, which has three sides of the sea, and it is economically advantageous. Cosmetic composition to be said that the effect is very large industrially.

1 is a graph confirming the moisturizing effect of eight kinds of algae through corneometry test, in contrast to a sample without adding the algae extract according to an embodiment of the present invention, the number 1 at the bottom of the graph is a control (placebo) 2, the hearing ( codium) cosmetics with fragile extract, No. 3 Undaria pinnatifida) was added to extract cosmetics, No. 4 bluish (Enteromorpha linza ) Cosmetics with No. 5 Ulva cosmetics with pertusa extract, No. 6 Sargassum horneri ) cosmetics with extract, No. 7 톳 ( Hizikia fusiformis ) Cosmetics No. 8 with Capsosiphon fulvescens Extract Cosmetics No. 9 Laminaria japonica ) with cosmetic extract and No. 10 Ecklonia cava ) means cosmetics to which the extract is added.
Figure 2 is a graph confirming the moisturizing effect of increasing the content of kelp extract according to an embodiment of the present invention.
Figure 3 is a graph confirming the persistence of the moisturizing effect by measuring the water content with increasing time when the present invention and the control group was added to the kelp extract according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention are described. However, the following examples are only preferred embodiments of the present invention, and the present invention is not limited to the following examples.

Example 1: Confirming the moisturizing effect of seaweed extract

Example 1-1; Preparation of Seaweed Extract and Cosmetic Composition

In order to identify active ingredients used in cosmetics from seaweeds, in particular, active ingredients that can improve the moisturizing effect, experiments were conducted on nine kinds of seaweeds. The nine kinds of seaweeds include Laminaria japonica , Codium fragile , Undaria pinnatifida , Seaweed (Enteromorpha linza ), Ulva pertusa , Sargassum horneri , and 구멍 ( Hizikia fusiformis). ), Capsosphon fulvescens and Ecklonia cava .

The nine kinds of algae used were collected from the southern coast of South Korea, such as Busan Cheongsapo, and the collected algae were removed from adherent organisms attached to the fronds of the algae, washed with clean fresh water and dried at room temperature, and then crushed. It was ground using.

Seaweed extract was prepared using the dried and pulverized seaweed pulverized product.

More specifically, to 500 mg of the pulverized seaweed pulverized product, 20 ml of a mixed solvent of 50% (v / v) water and 50% (v / v) propylene glycol based on volume is added to During the extraction using a shaking incubator rotating at 122 rpm at room temperature. The extracted crude extract was separated for 5 minutes at 4,000 rpm and filtered using a paper filter to obtain an extract. The solvent of the extract is a solvent that can be used in cosmetics, it is mainly included in the cosmetics was used as it is without removing the solvent by a separate decompression process. Each extract obtained was refrigerated until use.

Cosmetics containing the seaweed extract was prepared in the formulation of the cream, was prepared in the composition of Table 1 in relation to the ingredients and contents, in the following Table 1, the seaweed extract was used for each extract prepared above. The algae extract refers to an extract without removing the extraction solvent.

Composition Weight% (w / w) Seaweed Extract
Disodium EDTA
Butylene Glycol
Methylparaben
Triethanolamine
Sorbitan Stearate (Sucrose Cocoate)
Solbitan Sesquioleate
Polysorbate 60
Stearic Acid
Cetaryl Alcohol
Cetyl Ethylhexanoate
Captylic / Capric Triglyceride
Cyclomethicone
Limnanthes Alba Seed Oil
Dimethicone
Tocopheyl Acetate
Propylparaben
Carbomer
Purified water (Water, demineralized) 10.00
0.10
6.00
0.20
0.25
4.50
0.50
0.50
1.50
1.50
8.00
2.00
4.00
2.00
0.50
0.20
0.10
0.25
to 100

Example  1-2; Confirmation of moisturizing effect

The moisturizing effect of the cream, which is a cosmetic composition comprising the seaweed extract prepared in Example 1-1, was confirmed.

First, 30 women with an average age of 27 years old (24 to 31 years old) were described for the experiment and consent was obtained. The thirty women were randomly selected and each group consisted of three groups, each of whom performed an experiment. The mean value of each group was used as an experimental measurement value. The test subjects were kept in an equilibrium state for at least 1 hour before performing the test after washing the test subject area with water soap according to the investigator's instructions.

Experiment of the moisturizing effect is the cosmetic composition prepared in Example 1-1 in the forearm region, specifically 6cm ² site with 8μl content per 1cm ² based on the active ingredient in the embodiment 1-1 Was applied, and the skin moisturization was measured by performing a corneometry test using the corneometer lead on the site, and the results are shown in FIG. 1.

As shown in FIG. 1, seaweeds (2, 3, 4 and 10) exhibiting a similar skin hydration level or lower moisture level than the control (Placebo, No. 1) to which no extract is added. And algae (No. 5, No. 6 and No. 7) were found to have a moisturizing effect. From the above results, the skin hydration level was improved by about 14.4% compared to the control group, and the kelp extract, No. 8 extract, was recognized as an effective ingredient for improving the moisturizing effect of cosmetics. It was found to be suitable.

Example  2: confirm the moisturizing effect of kelp extract

The kelp extract, which was confirmed to have the best moisturizing effect in Example 1, was identified as an active ingredient of the cosmetic composition for moisturizing, and the cosmetic prepared by corneometry test used in Example 1 using the kelp extract prepared in Example 1 above. The moisturizing effect of the composition was confirmed.

Example  2-1; Moisturizing effect according to added amount of kelp extract-Confirmation of optimum amount

A cosmetic composition (control, 1% (w / w), 3% (w / w), in which the amount of the kelp extract of Example 1 was adjusted in the range of 1% (w / w) to 15% (w / w), Experiments were performed on 5% (w / w), 7% (w / w), 10% (w / w) and 15% (w / w)). 21 people were selected and the experiment was performed by the method of Example 1. The experimental results are shown in FIG. 2.

As shown in FIG. 2, it was confirmed that the moisturizing effect was improved from the water content in the test group to which the kelp extract was added as compared to the control group (0% (w / w)) to which no extract was added. Of note, the moisturizing effect increased as the concentration increased in the experimental group added 10% (w / w), but rather compared to the experimental group added 10% (w / w) in the experimental group added 15% (w / w). It was confirmed that the moisturizing effect slightly decreased. From these results, the optimum content for preparing the cosmetic composition was found to be 10% (w / w) based on the weight of the total composition of the kelp extract.

Example  2-2; Confirmation of Persistence of Moisturizing Effect of Kelp Extract

The moisturizing effect of the kelp extract was compared by comparing the control composition (0% (w / w)) with the cosmetic composition added with 10% (w / w), which is the extract content identified as the optimum content in Example 2-1. Persistence was confirmed. In the experiment, the experiment was performed by the method of Example 1 by dividing into two groups by arbitrarily selecting 10 people from the experimenter of Example 1. After applying the cosmetic composition, that is, the cream, the moisture content (1 minute, 3 minutes, 5 minutes, 10 minutes, 15 minutes, 30 minutes, 60 minutes, 90 minutes and 120 minutes) over time was measured for 2 hours. The experimental results are shown in FIG. 3.

As shown in FIG. 3, the test group to which the kelp extract was added compared to the control group to which no extract was added (0% (w / w)) showed high moisture content and was found to have excellent moisturizing effect. In particular, the relative moisture content measured over time increased from about 120% (1 minute) to about 130% (30 minutes) and about 150% (90 minutes). The degree was clearly confirmed. From the above results, the kelp extract was evaluated to be suitable for use in moisturizing cosmetics such as creams, which must maintain a moisturizing effect for a long time.

Taken together, the seaweed extract has a remarkably superior moisturizing effect compared to other seaweeds, and this moisturizing effect can be maintained for a long time, and kelp is a seaweed that has been ingested for a long time with less problems such as safety and side effects. Therefore, the kelp extract is used to improve the moisturizing effect of cosmetics, it can be used in various cosmetic compositions and external compositions including skin moisturizing cosmetic composition, furthermore skin moisturizing cosmetic composition for preventing wrinkles and anti-aging. It was expected.

Manufacturing example

Preparation Example 1 Preparation of Skin Ointment

To the skin ointment was prepared in the composition of Table 2 (unit: wt%).

Composition weight % Kelp Extract
Diethyl sebacate
Prepayment
Polyoxyethylene Oleyl Ether Phosphate
Sodium benzoate
vaseline 10
8
5
6
Suitable amount
to 100

Preparation Example 2: Preparation of Cosmetics (Cream)

To prepare a cream in the composition of Table 3 (unit: wt%).

Composition weight % Kelp Extract
Stearic acid
Cetanol
Fiji-20 sorbitan monostearate
Sorbitan monostearate
Mineral oil
Trioctanoate
Triethanolamine
Carbomer
glycerin
Propylene glycol
antiseptic
incense
Purified water 10
1.0
2.0
1.0
1.0
10.0
5.0
0.5
0.2
5.0
3.0
Suitable amount
Suitable amount
to 100

Preparation Example 3 Preparation of Cosmetic (Flexible Cosmetic)

To the flexible composition was prepared in the composition of Table 4 (unit: wt%).

Composition weight% Kelp Extract
ethanol
Polyoxyethylene Cured Castor Oil
Paraoxybenzoic Acid Methyl
glycerin
1,3-butylene glycol
incense
Pigment
Purified water 10
10.0
1.0
2
5.0
6.0
Suitable amount
Suitable amount
to 100

Claims (4)

A cosmetic composition for moisturizing skin comprising Laminaria japonica extract as an active ingredient. The method of claim 1,
Kelp extract is a cosmetic composition for moisturizing skin is extracted from at least one selected from the group consisting of kelp water, alcohol having 1 to 5 carbon atoms and mixtures thereof. The method of claim 2,
The extraction solvent is a skin moisturizing cosmetic composition, characterized in that propylene glycol and water is a mixed solvent mixed 1: 1 in volume. The method of claim 1,
Cosmetic composition for skin moisturizing the content of kelp extract is 10% by weight based on the total composition.

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