KR20050054677A - Skin moisturizing cosmetic composition - Google Patents

Abstract

The present invention relates to a skin moisturizing cosmetic composition, 0.005 to 10% by weight of any one of the oil-soluble cellulose compounds selected from the group consisting of cellulose, cellulose derivatives and mixtures thereof based on the total weight of the composition; And 0.01 to 5% by weight higher alcohol; characterized in that it contains. The cosmetic composition for skin moisturizing of the present invention is not only skin irritation and excellent moisturizing effect and feeling, but also good long-term storage stability without addition of emulsifier.

Description

Cosmetic composition for skin moisturizing {SKIN MOISTURIZING COSMETIC COMPOSITION}

The present invention relates to a skin moisturizing cosmetic composition, and more particularly to a skin moisturizing cosmetic composition effective to improve dry skin by containing an oil-soluble cellulosic compound and a higher alcohol in an appropriate amount.

In the human body, the skin acts as a protective film to protect the living body from the external environment. It prevents the loss of biological components such as water or electrolytes and prevents harmful substances from entering the body. . Such skin is largely divided into epidermal layer, dermis layer and subcutaneous fat layer. The epidermal layer is composed of keratinocytes and melanocytes. Since the keratinocyte layer on the outermost surface of the skin is in direct contact with the external environment, strong resistance to physical, chemical, or permeation of the substance is required, and moisture is lost from the body to the outside. In addition, it must maintain flexibility by retaining adequate moisture on its own.

Generally, the moisture content of the skin is about 70% in the dermal layer, but decreases gradually toward the epidermal layer, which is about 10 to 30% in the keratinocyte layer. The water supplied from the dermal layer is mainly moved up the stratum corneum by passive diffusion and finally discharged to the outside. This is called Trans Epedermal Water Loss (TEWL), which is known to be maintained at an appropriate level by the sebaceous component and the epidermal lipid, which are the lipid membrane components of the keratinocyte layer. In addition, in the keratinocyte layer, a substance having a hydrophilic water retention capability called a natural moisturizing factor (NMF) is known to play an important role in moisturizing the skin. When the moisture of the keratinocyte layer is maintained at about 10 to 30%, the skin is smooth and soft, and the body protects normally.

However, when the moisture content of the keratinocyte layer is less than 10%, the skin becomes rough and the body loses its protective function, causing aging. For example, in the case of dry skin, the cohesion of keratinocytes is weakened, and the scale phenomenon in which keratinocytes are peeled off from the surface of the skin like scales appears. This is because it is less than normal skin. In addition, even healthy skin may suffer from a lack of moisture due to harsh external environment, ie, wind, cold weather, sunlight, face wash, shaving, and so on, may cause a bad skin condition. Therefore, it is very important to properly maintain the water content of the keratinocyte layer of the skin.

To this end, cosmetics such as sebum-like components, NMF components, or moisturizers such as polyols were added and used. For example, glycerin, sorbitol, etc., which have three or more hydroxyl groups (OH groups) as water-soluble polyols, have been added, but they exhibit excellent moisturizing power, but are sticky, causing unpleasant feelings and depriving moisture in the skin according to relative humidity. In addition, propylene glycol, 1,3-butylene glycol, etc. having two hydroxyl groups (OH groups) may cause side effects of the skin upon addition. In addition, additives such as sodium pyrrolidone carboxylate (PCA-Na), sodium lactate, and urea, which are other natural moisturizing factors, are highly electrolytic and have a problem of impairing the emulsion stability of cosmetics.Amino acids, collagen, elastin The back has moisturizing ability, but its moisturizing ability is limited. On the other hand, Japanese Patent Laid-Open No. 2000-212020 discloses a technique for solving the above-mentioned problems by containing a branched fatty acid cholesterol ester, hydrogenated lecithin and dialkyl ether. However, cholesterol derivatives have a problem in solubility, and when used in a large amount, heaviness and stickiness appear, so the feeling of use decreases.

Accordingly, the technical problem to be achieved by the present invention is to solve the above problems, to provide a skin moisturizing cosmetic composition that is excellent in long-term storage stability as well as excellent skin moisturizing effect and excellent moisturizing effect and feeling.

In order to achieve the above technical problem, the present invention is 0.005 to 10% by weight of any one of the oil-soluble cellulose compounds selected from the group consisting of cellulose, cellulose derivatives and mixtures thereof based on the total weight of the composition; And higher alcohol 0.01 to 5% by weight; provides a skin moisturizing cosmetic composition containing.

In the skin moisturizing cosmetic composition of the present invention, as the oil-soluble cellulose compound, cellulose, cellulose acetate, ethyl cellulose, methyl ethyl cellulose and the like can be used. As the higher alcohol, a higher alcohol having 12 to 22 carbon atoms, for example Lauryl alcohol, cetyl alcohol, isostearyl alcohol, stearyl alcohol, cetostearyl alcohol, batyl alcohol and behenyl alcohol may be used alone or in combination thereof.

Hereinafter, the cosmetic composition for moisturizing the skin of the present invention will be described in detail.

The inventors of the present invention while studying a cosmetic composition excellent in skin moisturizing effect, when the oil-soluble cellulose-based compound and a higher alcohol is added properly to the cosmetics to produce an emulsion having excellent long-term storage stability even without using an emulsifier to stimulate the skin by the emulsifier In addition to this, the cellulose-based compound forms a thin film when applied to the skin to prevent evaporation of moisture in the skin, thereby making it excellent in moisturizing effect and exhibiting excellent usability that is not sticky or greasy, thus completing the present invention. .

The skin moisturizing cosmetic composition of the present invention contains 0.005 to 10% by weight of the oil-soluble cellulose compound, and 0.01 to 5% by weight of the higher alcohol.

The oil-soluble cellulose-based compound and the higher alcohol added to the skin moisturizing cosmetic composition of the present invention form an oily gel network structure in the emulsion to stabilize long-term preservation of the emulsion even without using an emulsifier, and form a thin film when applied to the skin. This prevents evaporation of moisture in the skin, so the moisturizing effect is maintained for a long time.

As the oil-soluble cellulose compound, oil-soluble cellulose and its derivatives such as cellulose, cellulose acetate, ethyl cellulose and methyl ethyl cellulose may be used alone or in combination of one or more thereof. The oil-soluble cellulose compound is preferably included in 0.005 to 10% by weight based on the total weight of the cosmetic composition. If the content is less than 0.005% by weight, there is a problem in the long-term storage stability of the emulsion without the emulsifier, the moisturizing effect is insignificant, and when the content is more than 10% by weight, the oil phase to dissolve the polymer is too high, it is difficult to manufacture the emulsion.

In the cosmetic composition for moisturizing the skin of the present invention, the higher alcohol includes 12 to 22 carbon atoms such as lauryl alcohol, cetyl alcohol, isostearyl alcohol, stearyl alcohol, cetostearyl alcohol batyl alcohol and behenyl alcohol. Alcohol etc. can be used individually or in mixture of 1 or more types. The content of the higher alcohol is preferably included in 0.01 to 5% by weight based on the total weight of the cosmetic composition. If the content is less than 0.01% by weight, there is a problem in the long-term storage stability of the emulsion without the emulsifier, when it exceeds 5% by weight of the excess higher alcohol is difficult to prepare a stable emulsion. The content ratio (% by weight) of the preferred oil-soluble cellulosic compound / higher alcohol is 500 to 0.1. Therefore, by adding the oil-soluble cellulose compound and the higher alcohol in an appropriate content and ratio, an emulsion having good long-term storage stability and skin safety is produced even without adding an emulsifier.

In addition to the above-mentioned components, the skin moisturizing cosmetic composition of the present invention includes, if necessary, conventional ingredients, such as oil, water, humectants, lower alcohols, thickeners, chelating agents, pigments, preservatives, and fragrances. May be added further.

The cosmetic composition for moisturizing the skin of the present invention is used for the skin, and is a common cosmetic form such as a nutrient emulsion, nourishing cream, massage cream, essence, pack, skin adhesive patch, skin adhesive gel, powder, ointment, or cosmetic liquid. And various conventional carriers and additives suitable for each of these formulations and well known in the art. In addition, the cosmetic composition may be made of a skin contact material in contact with the skin, such as cosmetics, detergents, and fibers.

Hereinafter, the present invention will be described in detail with reference to Examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the invention should not be construed as limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

Nutritional fluids

Examples 1-2 and Comparative Examples 1-3

Nutritional milk was prepared according to the ingredients and contents shown in Table 1 below. First, the aqueous phase and the oil phase were heated and dissolved at about 75 to 80 ° C., respectively, and the mixture obtained by adding the oil phase to the aqueous phase was emulsified for 5 minutes while stirring at a speed of 5,000 rpm with a homomixer, and cooled to prepare a nutrient emulsion. In Table 1 the units are weight percent.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 cellulose 0.10 - - 0.1 - Ethyl cellulose 0.50 1.00 - 0.5 - Cetostearyl alcohol 0.50 0.50 - - 0.50 Isostearyl Alcohol 0.50 0.50 - - 0.50 Beeswax 0.30 0.30 0.30 0.30 0.30 Squalane 4.00 4.00 4.00 4.00 4.00 Isocetyloctanoate 4.00 4.00 4.00 4.00 4.00 Dimethyl Polysiloxane 2.30 2.30 2.30 2.30 2.30 Polysorbate 60 - - - - 0.50 Sorbitan stearate - - - - 1.00 Concentrated glycerin 4.00 7.00 4.00 4.00 4.00 Dipropylene glycol 4.00 7.00 4.00 4.00 4.00 Carboxy Polymer 0.15 0.15 0.15 0.15 0.15 Triethanolamine 0.20 0.20 0.20 0.20 0.20 antiseptic Quantity Quantity Quantity Quantity Quantity Spices Quantity Quantity Quantity Quantity Quantity Pigment Quantity Quantity Quantity Quantity Quantity Purified water Remaining balance Remaining balance Remaining balance Remaining balance Remaining balance

Essence manufacturer

Examples 3-4 and Comparative Examples 4-5

Essence was prepared according to the ingredients and contents shown in Table 2 below. First, the aqueous and oil phases were heated and dissolved at about 75 to 80 ° C., respectively, and the mixture obtained by adding the oil phase to the aqueous phase was emulsified for 5 minutes while stirring at a speed of 5,000 rpm with a homomixer, and then cooled to prepare an essence. In Table 2 the units are weight percent.

division Example 3 Example 4 Comparative Example 4 Comparative Example 5 cellulose 0.10 - - - Ethyl cellulose 0.80 1.20 - - Stearyl alcohol 0.50 1.50 0.50 1.50 Isostearyl Alcohol 0.50 0.50 0.50 0.50 Octanoin 2.00 2.00 2.00 2.00 Squalane 5.00 5.00 5.00 5.00 Neopentylglycol Dicaprate 4.00 4.00 4.00 4.00 Cyclomethicone 3.00 3.00 3.00 0.30 Polysorbate 60 - - - 0.50 Sorbitan stearate - - - 1.00 Concentrated glycerin 8.00 8.00 8.00 8.00 Dipropylene glycol 4.00 4.00 4.00 4.00 Betaine - 4.00 - 4.00 Xanthan Gum 0.20 0.20 0.20 0.20 Carboxy Polymer 0.15 0.15 0.15 0.15 Triethanolamine 0.20 0.20 0.20 0.20 antiseptic Quantity Quantity Quantity Quantity Spices Quantity Quantity Quantity Quantity Pigment Quantity Quantity Quantity Quantity Purified water Remaining balance Remaining balance Remaining balance Remaining balance

Nutrition Cream

Examples 5-6 and Comparative Examples 6-7

Nutritional cream was prepared according to the line segment and the content shown in Table 3. First, the aqueous phase and the oil phase were heated and dissolved at about 75 to 80 ° C., respectively, and the mixture obtained by adding the oil phase to the aqueous phase was emulsified for 5 minutes while stirring at a speed of 5,000 rpm with a homomixer, and then cooled to prepare a nourishing cream. In Table 3, the unit is weight percent.

division Example 5 Example 6 Comparative Example 6 Comparative Example 7 Cellulose acetate 0.50 - - - Ethyl cellulose 0.50 1.50 - - Cetostearyl alcohol 1.50 1.50 1.50 1.50 Isostearyl Alcohol 1.50 1.50 1.50 1.50 Beeswax 0.80 0.80 0.80 0.80 Squalane 5.00 7.00 5.00 7.00 Macadamia Oil 7.00 7.00 7.00 7.00 Cyclomethicone 3.00 3.00 3.00 0.30 Polysorbate 60 - - 0.50 1.50 Sorbitan stearate - - 1.00 1.50 Concentrated glycerin 8.00 8.00 8.00 8.00 Dipropylene glycol 4.00 4.00 4.00 4.00 Butylene glycol 2.00 5.00 2.00 5.00 Betaine 2.00 4.00 2.00 4.00 Xanthan Gum 0.20 0.20 0.20 0.20 Carboxy Polymer 0.15 0.15 0.15 0.15 Triethanolamine 0.20 0.20 0.20 0.20 antiseptic Quantity Quantity Quantity Quantity Spices Quantity Quantity Quantity Quantity Pigment Quantity Quantity Quantity Quantity Purified water Remaining balance Remaining balance Remaining balance Remaining balance

Examples 1 to 6 and Comparative Examples 1 to 7 prepared by the above-described method were evaluated by dividing them into items of long-term storage stability, moisture retention ability, dry skin improvement effect, skin safety, and ease of use.

[Long-term storage stability]

The compositions obtained in Examples 1 to 6 and Comparative Examples 1 to 7 were prepared in units of 1 week, 1 month, and 6 months at 0 ° C., 40 ° C., 45 ° C., 50 ° C., in a thermostat of a cycle, and at room temperature. It evaluated according to the evaluation criteria and shown in Table 4.

◎ Evaluation criteria

(O: Good, △: Unstable, ×: Separation)

Item Example Comparative example One 2 3 4 5 6 One 2 3 4 5 6 7 0 ℃ 1 week O O O O O O × O O △ O O O 1 month O O O O O O × △ O × O O O 6 months O O O O O O × × O × O O O 40 ℃ 1 week O O O O O O × △ O × O O O 1 month O O O O O O × × O × O O O 6 months O O O O O O × × O × O O O 45 ℃ 1 week O O O O O O × △ O × O O O 1 month O O O O O O × × O × O O O 6 months △ O O O O O × × O × O O O 50 ℃ 1 week O O O O O O × △ O × O O O 1 month O O O O O O × × O × O O O 6 months △ △ O O O O × × △ × △ △ O Cycle 1 week O O O O O O × △ O × O O O 1 month O O O O O O × × O × O O O 6 months △ △ △ O O O × × △ × △ △ O Room temperature 1 week O O O O O O × O O △ O O O 1 month O O O O O O × △ O × O O O 6 months O O O O O O × × O × O O O

As shown in Table 4, it can be seen that the cosmetic composition of Examples 1 to 6 according to the present invention has excellent long-term storage stability of the emulsion by the oily gel network structure without an emulsifier because it contains an appropriate amount of an oil-soluble cellulose-based compound and a higher alcohol. have. On the other hand, Comparative Example 1 does not contain an emulsifier can be seen that the stability is very poor. This is a clear example showing that the role of emulsifiers is very important in preparing conventional conventional cosmetic emulsions. In addition, Comparative Examples 2 and 4 are used in the case where only the higher alcohol is used without adding the oil-soluble cellulose compound, it can be seen that such cosmetics are very poor in long-term storage stability without the addition of an emulsifier.

[Moisture retention evaluation]

The water retention performance of the compositions obtained in Comparative Examples 3, 5 and 7 and Examples 2, 4 and 6 was evaluated. Moisture retention capacity was measured using SKICON-200 (IBS, Japan), and the electrical conductivity of the skin surface was measured. The measurement condition was 0.03g per 16 cm² of skin in a constant temperature and humidity room maintained at 22 ° C and 50% relative humidity. After application, it was measured at each time period and repeated three times. The test subjects were 30 people.

(Unit: μ / Ω) Experiment item Example 2 Example 4 Example 6 Comparative Example 3 Comparative Example 5 Comparative Example 7 Primary 30 minutes after application 194 200 220 180 191 195 120 minutes after application 161 176 191 95 94 101 Secondary 30 minutes after application 200 205 221 185 194 196 120 minutes after application 165 179 195 97 99 103 3rd 30 minutes after application 193 195 218 179 186 190 120 minutes after application 163 171 198 92 97 102

As shown in Table 5, Examples 2, 4, 6 according to the present invention can be seen that the moisture retention capacity is superior to Comparative Examples 3, 5, 7. In particular, the cosmetic composition of the present invention after 30 minutes and 2 hours can be seen that the water retention ability is superior to the conventional general cosmetics. This indicates that the moisturizing effect is superior.

[Evaluation of Dry Skin Improvement]

In order to evaluate the moisturizing power of the compositions obtained in Comparative Examples 5 and 6 and Examples 4 and 5 by another method, a dry skin improvement effect evaluation test was performed. The test was conducted on 24 adult men and women with dry hand region twice a day for 3 months.

First, before using the sample, the scale generated on the skin of an area of 4 cm × 4 cm in the back of the subject's hand was selected as a dry evaluation parameter, and then the scale of the back of the hand was measured by a handheld microscope (Handy Scope). The scale area was measured using. Then, the moisturizing cream and milk croquettes prepared according to Examples 4 and 5 and Comparative Examples 5 and 6 were respectively used for 3 months on the back of 24 test subjects, and then the scale area was measured. 6 is shown. In Table 6 the figures are% of scale area over the total area.

division Example 4 Example 5 Comparative Example 5 Comparative Example 6 Before use 15.2 14.9 15.1 14.8 after use 3.2 3.6 5.2 5.4

As shown in Table 6, in the case of using the composition prepared according to Examples 4 and 5, the scale area was significantly reduced compared to Comparative Examples 5 and 6, which shows that Examples 4 and 5 have very good dry skin improvement effect. Indicates.

[Skin Safety]

Skin safety was evaluated by skin splenic experiment with Examples 1, 3, and 5 and Comparative Examples 3 and 7. Total 90 patients (73: male, 17: male) who had experienced skin side effects by cosmetics After the application of the patch on the patient's back 48 hours after the patch was removed, the first judgment was made after 1 to 2 hours, after 72 hours or 96 hours was determined and the results are shown in Table 7 below.

Item Positive reaction % Example 1 0 (+) 0.0 Example 3 1 (+) 1.1 Example 5 1 (+) 1.1 Comparative Example 3 3 (+) 3.5 Comparative Example 7 5 (+) 5.7

As shown in Table 7, the cosmetic compositions of Examples 1, 3 and 5 according to the present invention do not contain an emulsifier as compared to Comparative Examples 3 and 7, it can be seen that the skin safety is excellent.

[Ease of use]

Ease of use was evaluated for Comparative Examples 3, 5, and 7 and Examples 2, 4 and 6. In other words, each of the comparative sample and the example sample (comparative example 3, example 2, (comparative example 3, example 4), etc.) by five persons was sensually evaluated for a total of 45 subjects. The results are shown in Table 8 below.

Item Comparative Example 3 Comparative Example 5 Comparative Example 7 Example 2 Example 4 Example 6 No shine 4.7 4.7 2.8 5.7 5.7 5.7 Sticky 5.0 4.3 5.5 5.7 5.7 5.7 Moist 5.5 5.9 5.7 6.0 6.4 6.6 pepper 4.7 4.7 4.3 6.4 6.4 6.6

◎ Evaluation criteria

1 (very bad), 2 (bad), 3 (slightly bad), 4 (medium)

5 (slightly good), 6 (good), 7 (very good)

As shown in Table 8, the examples were evaluated as having the best ease of use because there is no shine and stickiness, moist, and no irritation.

As described above, the moisturizing cosmetic composition according to the present invention is a cosmetic composition containing an oil-soluble cellulose-based compound and a higher alcohol in an appropriate amount, and an emulsion having excellent long-term storage stability is prepared even without using an emulsifier, thereby causing skin irritation by the emulsifier. There is no In addition, when applied to the skin, the cellulose-based compound forms a thin film to prevent evaporation of moisture in the skin, thereby providing an excellent moisturizing effect, and also exhibiting excellent usability that is not sticky or greasy.

Claims (6)

Cosmetic composition for skin moisturizing, based on the total weight of the composition 0.005 to 10% by weight of any of the oil-soluble cellulose compounds selected from the group consisting of cellulose, cellulose derivatives, and mixtures thereof; And 0.01-5% by weight of higher alcohol; cosmetic composition for moisturizing the skin, characterized in that it contains. The cosmetic composition for moisturizing skin according to claim 1, wherein the weight ratio of the oil-soluble cellulose-based compound / higher alcohol is 500 to 0.1. The cosmetic composition for moisturizing skin according to claim 1, wherein the oil-soluble cellulose compound is any one selected from the group consisting of cellulose, cellulose acetate, ethyl cellulose and methyl ethyl cellulose. The cosmetic composition for moisturizing skin according to claim 1, wherein the higher alcohol is a higher alcohol having 12 to 22 carbon atoms. According to claim 4, wherein the higher alcohol having 12 to 22 carbon atoms is any one selected from the group consisting of lauryl alcohol, cetyl alcohol, isostearyl alcohol, stearyl alcohol, cetostearyl alcohol, batyl alcohol and behenyl alcohol Cosmetic composition for skin moisturizing which is. According to claim 1, wherein the cosmetic composition is formed in any one formulation selected from the group consisting of nutrient fluid, nourishing cream, massage cream, essence, pack, skin patch, skin adhesive gel, powder, ointment, and essence. Cosmetic composition for skin moisturizing, characterized in that.