KR20180129087A - Cosmetic composition comprising curd of non-uniform particle and method for manufacturing the same - Google Patents

Abstract

The present invention relates to a cosmetic composition for exfoliation comprising a curd of non-uniform particles, and a method for preparing the same. More specifically, the method comprises the following steps: (A) heating an oily phase and an aqueous phase containing milk to 70-80°C, and mixing the mixture; (b) adding an acid to the mixture at 70-80°C; and (c) cooling the mixture to 25-30°C. According to the method of the present invention, by adding an acid directly to a preparation containing milk and decreasing the pH to 5.5 or less, a natural milk protein scrub may be formed due to rapid coagulation actions, and further, there may be formed a cosmetic composition which has exfoliating effects due to a mild chemical peeling effect and physical abrasion.

Description

[0001] Cosmetic compositions comprising non-uniform particles of curd and methods of making the same [0002]

The present invention relates to a cosmetic composition for exfoliating comprising a curd of uneven particles and a method for producing the same.

Smooth skin means glossy, clear and elastic skin. As the aging process progresses, the human skin loses its elasticity and glossiness, and after a series of processes that are horny and rough, wrinkles are generated, and the skin aging is progressed.

The skin surrounds the whole body and protects the living body from various stimuli, obstacles and drying from the outside. It is divided into three layers of epidermis, dermis and subcutaneous tissue in order from the outside. The epidermis is divided into the horny layer, the granular layer, the polar layer and the basal layer, and the stratum corneum is a part directly contacted by the cosmetics on the outermost layer of the epidermis and has a physical and chemical resistance, which is also related to the properties of the cosmetic face.

The differentiation process of epidermal cells is called keratinization, and the process of keratinization is repeated through the process of elimination of cells into old keratinocytes in the outermost layer through the basal layer, the anterior layer, the granular layer, and the stratum corneum. Cells that arrive at the stratum corneum are keratinized, flat-dead cells, where millions of dead keratinocytes are removed from the skin and replaced with new keratinocytes. The flattened keratinocytes are firmly connected to each other as if they were stacked bricks, making the stratum corneum stronger and at the same time obtaining flexibility explained by free movement and functioning as a barrier. The keratinocytes are continuously formed in sequence, and the epidermis maintains a constant thickness because the old keratinocytes in the outermost layer sometimes disengage. This turnover is usually referred to as a turnover, and the turnover of the epidermis in normal skin, depending on site and age, is said to be about four weeks.

However, if this keratinization process is not smooth, abnormal keratinocytes are formed and piled on the surface of the skin, thickening the stratum corneum, making the skin rough, making the skin dull, making it difficult to make up or not appearing. Therefore, women are trying to overcome this phenomenon, and cosmetics companies are launching various cosmetics using peeling and moisturizing to remove the dullness of skin.

On the other hand, it has long been known that milk has several cosmetic beneficial effects. Therefore, there have been many attempts to use milk or milk ingredients in cosmetics. For example, a method of adding milk to water or ethanol, which is the main base (solvent) of cosmetics, has been studied, but only a very limited amount has been used because of problems such as feeling, stability, and uniformity of particles, It has been common to manufacture and use cosmetics.

In order to solve such a problem, there has been an attempt to incorporate the defatted milk-derived cream into the external preparation for skin (Korean Patent Publication No. 10-2012-0075718).

However, attempts have not been made for an exfoliating cosmetic composition containing a curd produced by adding an acid to milk.

On the other hand, in the case of the exfoliating agent containing the conventional natural cellulose, the exfoliating effect was shown due to the physical friction, and this had a problem in that the effect was insufficient in comparison with chemical peeling such as AHA.

Under these circumstances, the present inventors have found that when an acid is directly added to a milk-containing formulation at a temperature of about 75 캜 to lower the pH to 5.5 or less, a natural milk protein scrub is formed due to a rapid protein coagulation action, It is possible to remove the exfoliation due to the physical friction together with the peeling effect, thereby completing the cosmetic composition for exfoliating.

Korean Patent Publication No. 10-2012-0075718

SUMMARY OF THE INVENTION An object of the present invention is to provide (a) an oil phase; And water to a temperature of 70 to 80 占 폚 and mixing them; (b) further mixing an acid with the mixture at 70 to 80 占 폚; And (c) cooling the mixture to 25 to 30 占 폚.

It is still another object of the present invention to provide a cosmetic composition for exfoliating, which comprises a curd of uneven particles produced according to the above-mentioned production method.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and to achieve the object of the present invention, And water to a temperature of 70 to 80 占 폚 and mixing them; (b) further mixing an acid with the mixture at 70 to 80 占 폚; And (c) cooling the mixture to 25 to 30 占 폚.

In another aspect, the present invention provides a cosmetic composition for exfoliating comprising a curd of uneven particles prepared according to the above-described production method.

Hereinafter, the present invention will be described in detail.

The present invention is a method of manufacturing a cosmetic composition for exfoliating skin based on the finding that particles are rough and scrub is produced when the acid is added to milk in different methods.

More specifically, oil phase; And a method for manufacturing a cosmetic composition having an effect of removing the exfoliation of the particles by roughly adhering the acid under a certain condition after warming the aqueous phase containing the milk.

In the present invention, (a) oil phase; And water to a temperature of 70 to 80 占 폚 and mixing them; (b) further mixing an acid with the mixture at 70 to 80 占 폚; And (c) cooling the mixture to 25 to 30 占 폚.

In the present invention, the step (a) may comprise: And milk are heated to 70 to 80 캜 and mixed therein. This is a pretreatment process for preparing a mixture of oil phase and water phase before adding curd to milk by adding an acid thereto.

In the present invention, the term " oil phase "means an oil phase-containing phase and" water phase "means an oil phase-containing phase. May be used without limitation. The mixing of the oil phase and the water phase may be carried out by specifically introducing the oil phase into the water phase.

The oil phase may further include at least one of an oil and an emulsifier.

The oil may be a polar oil, a non-polar oil or a mixture thereof.

The non-polar oil may be a silicone oil or a hydrocarbon oil, but is not limited thereto.

The silicone oil may be selected from the group consisting of dimethicone, lauryl dimethicone, cyclopentasiloxane, cyclohexasiloxane, trisiloxane, methyltrimethicone, phenylmethicone, dimethicone polyol, Dimethicone polyol acetate, silicone glycol copolyol, But are not limited to, cone, methylpolysiloxane, methylphenylpolysiloxane, dimethicone copolyol methyl ether, methylcyclopolysiloxane, dimethylpolysiloxane, hexamethyldisiloxane, or caprylylmethylpolysiloxane.

The hydrocarbon oil includes, but is not limited to, isododecane, isohexadecane, squalane, hydrogenated polyisobutene, vaseline, paraffin, ceresin, or mineral oil such as petrolatum.

The emulsifier may be selected from the group consisting of cetearyl alcohol, phage-100 stearate, sorbitan olivate, glyceryl stearate, lecithin, polyglyceryl-3 methyl glucoside distearate, phage-40 castor oil, polysorbate 60 And specifically may be cetearyl alcohol, glyceryl stearate, and / or phage-100 stearate, and more specifically may be cetearyl alcohol, but is not limited thereto.

The water phase may further comprise milk and a preservative. Specifically, in the present invention, milk may be contained in the water phase, and a curd may be generated by adding an acid diluted in the milk in a subsequent step. When the curd is produced according to the method of the present invention, it is possible to produce emulsified particles having uniform particle and very soft feeling.

Examples of the preservative include 1,2-hexanediol, propanediol, caprylylglycol, phenoxyethanol, ethylparaben, methylparaben and the like, and 1,2-hexanediol may be specifically used.

The term "milk" in the present invention means any dairy product derived from milk and milk such as raw milk, colostrum, milk, powdered milk, condensed milk, curdled milk, fermented milk, yogurt, whey, ice cream, fresh cream, butter, cheese and the like.

The oil phase and water phase can be heated to 70 to 80 ° C, specifically to 75 ° C, and the oil phase and the water phase can be easily mixed according to the heating. Specifically, emulsifiers and waxes contained in an oil phase can not exist in a liquid state at a low temperature, and therefore, when they are produced in a state in which they are not warmed up, emulsified particles of a certain size can not be produced. Therefore, uniform emulsified particles can be formed through the warming process.

The mixing step may be performed at 70 to 80 ° C. If the temperature is lower than 70 ° C, there may be a problem that the oil phase and the water phase are not mixed well. If the temperature is higher than 80 ° C, the hardness of the curd is hardened and the fitness as a cosmetic product may be deteriorated.

The step (a) is a pretreatment step for the acid addition step, which is an essential step of the present invention to be described later.

In the present invention, the step (b) is a step of further mixing an acid with the mixture at 70 to 80 ° C, and through this step, a curd having a coarse particle size can be produced from milk.

In the above step, the acid may be further mixed at 70 to 80 ° C, specifically 75 ° C. If the amount is outside of the above range, rapid protein coagulation of the milk does not occur in the step of mixing the acid thereafter, and the emulsion particle size is relatively uniform, which may deteriorate the effect as a cosmetic composition for exfoliating.

In one embodiment of the present invention, it was confirmed that the emulsion particle uniformity was lower than that at 45 캜 when the acid was introduced at a temperature of 75 캜, and more scrub was generated, and the effect as a cosmetic composition for exfoliating was excellent (Table 3).

When an acid is adducted according to the production method of the present invention, it is possible to produce a seed having a non-uniform particle size. The step of adding the acid may be specifically carried out after emulsification. More specifically, the step of mixing the acid may be a direct introduction of the acid while stirring the mixture.

In one embodiment of the present invention, the cosmetic composition exhibits a coarse particle size and excellent scrub formation effect when the lactic acid stock solution is directly injected after the high temperature treatment of the oil phase and the water phase, (Table 3).

In the present invention, "scrub" may mean fine grains contained in the cosmetic composition for exfoliation, and the skin may be rubbed lightly to obtain a skin exfoliation effect.

In the present invention, scrub can be produced by mixing the acid.

The acid added in the present invention is preferably an undiluted acid stock solution. In one embodiment of the present invention, it was confirmed that when the lactic acid was directly added without dilution, the lactic acid was added to the purified water to dilute the purified water to 5%, thereby producing curds having more uneven particles (Table 3).

In addition, the acid added in the present invention can be mixed in an amount of 0.01 to 10% by weight, more specifically 0.1 to 1% by weight, and more specifically 0.5% by weight, based on the whole cosmetic composition. In addition, the pH of the acid added in the present invention may be 1 to 5, and may be 2 to 4 in particular. A curd is formed within the pH range, and when the pH is more than 6, there is a fear that a curd is not formed. Here, the pH means the pH of the acid to be added to the mixture.

The "acid" in the present invention may be, but is not limited to, lactic acid, citric acid, fumaric acid, tartaric acid, succinic acid, maleic acid, malic acid, oxalic acid, ascorbic acid, aspartic acid, formic acid or glutamic acid.

Curd can be produced by mixing the acid with the mixture.

In the present invention, "curd" means that milk is solidified by an acid or an enzyme, and the main component of the curd is a coagulum of casein, which is a main protein of milk. Generally, milk can form curds through the coagulation of proteins and the like as the pH is lowered.

The curd may be a non-uniform particle.

The acid may be used to lower the pH of the milk to produce curd, a coagulated milk protein. Specifically, before adding the acid, it exists in the form of a simple milk, and when the acid is added, the coagulation action of the protein contained in the milk may cause the granule having the graininess. In addition, when an acid is added, a chemical peeling effect may also occur.

In the present invention, the step (c) is a step of cooling the mixture to 25 to 30 캜 so that the generated curd is rapidly cooled to have more uneven particles.

In this step, the solution may be cooled to 25 to 30 ° C, specifically to 28 ° C. When the uniformly formed emulsion particles having fluidity at high temperature are cooled to room temperature, the fluidity is reduced and the emulsion particles can be stored in a stable state for a long time.

The cooling step may be carried out at 25 to 30 占 폚. If the value is out of the above-mentioned range, the curd may not be rapidly cooled, which may result in deterioration of the exfoliation effect of the cosmetic composition.

The step (c) may further include defoaming, in order to prevent the viscosity from increasing or decreasing beyond the expected value by influencing the viscosity measurement of the mixture when bubbles are present in the mixture.

In the present invention, "defoaming" may mean removing bubbles or bubbles.

In another aspect of the present invention, there is provided a cosmetic composition for exfoliating, which comprises a curd of uneven particles produced by the method for producing a cosmetic composition as described above.

The viscosity of the curd may be 5000 to 7000 cps, and may be specifically 6100 cps. It is possible to provide a cosmetic composition excellent in exfoliation effect in the viscosity range.

The pH of the cosmetic composition may be 4 to 7 days, and a mild, high-mage type scrub agent may be formed in the above range, and a mild chemical peeling effect due to nutrients and weak acidity of milk may be expected.

The particle size of the curd may be distributed from 1 to 10,000 mu m. It is possible to provide a cosmetic composition excellent in the exfoliation effect in the particle size range. Particularly, the particle size can be distributed in a range of 1 to 1,000 μm when viewed at a simple particle size, but can be increased up to 10,000 μm or more when the curd particles are rolled together in a hand during the exfoliation process. At this time, as the curd particles aggregate, they provide physical frictional force, which can increase the exfoliation effect of the skin.

The cosmetic composition according to the present invention can provide an exfoliating cosmetic composition having a nonuniform particle size and capable of forming a scrub using a method of adding lactic acid after warming an aqueous phase containing milk and milk.

Meanwhile, the cosmetic composition according to the present invention can be used as a cosmetic composition in the form of a solution, an ointment for external use, a cream, a foam, a nutritional lotion, a softening water, a pack, a soft water, an emulsion, a makeup base, It may be formulated as a suspension, emulsion, paste, gel, lotion, powder, soap, surfactant-containing cleansing, oil, powder foundation, emulsion foundation, wax foundation, patch and spray, But is not limited to.

In addition, the cosmetic composition of the present invention may further comprise at least one cosmetically acceptable carrier to be incorporated in a general skin cosmetic composition, and examples thereof include oil, water, a surfactant, a moisturizer, A thickening agent, a chelating agent, a coloring matter, an antiseptic, a perfume, and the like may be appropriately compounded, but the present invention is not limited thereto.

The cosmetically acceptable carrier to be contained in the cosmetic composition of the present invention varies depending on the formulations.

When the formulation of the present invention is an ointment, a paste, a cream or a gel, the carrier component may be an animal oil, a vegetable oil, a wax, a paraffin, a starch, a tracer, a cellulose derivative, polyethylene glycol, silicone, bentonite, silica, talc, zinc oxide Mixtures of these may be used.

When the formulation of the present invention is a powder or a spray, lactose, talc, silica, aluminum hydroxide, calcium silicate, polyamide powder or a mixture thereof may be used as the carrier component, Propellants such as fluorohydrocarbons, propane / butane or dimethyl ether.

When the formulation of the present invention is a solution or emulsion, a solvent, a dissolving agent or an emulsifying agent is used as a carrier component, and examples thereof include water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, 1,3-butyl glycol oil may be used, in particular fatty acid esters of cottonseed oil, peanut oil, corn oil, olive oil, castor oil and sesame oil, glycerol aliphatic esters, polyethylene glycols or sorbitan may be used have.

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 suspension such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, Crystalline cellulose, aluminum metahydroxide, bentonite, agar or tracant, etc. may be used.

When the formulation of the present invention is a soap, an alkali metal salt of a fatty acid, a fatty acid hemiester salt, a fatty acid protein hydrolizate, isethionate, a lanolin derivative, an aliphatic alcohol, a vegetable oil, glycerol, .

According to the method for producing a cosmetic composition of the present invention, when an acid is directly added to a milk-containing formulation at a temperature of 75 ° C or higher and the pH is lowered to 5.5 or lower, a natural milk protein scrub is formed owing to the rapid solidification action, A cosmetic composition having an exfoliating effect due to physical friction can be produced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an image obtained by measuring the appearance roughness of a cosmetic composition according to one embodiment of the present invention and (b) a comparative example by a microscope.
FIG. 2 is an image obtained by observing under microscope whether (a) an embodiment of the present invention and (b) a scrub (comparative example) of Comparative Example 5 is formed.
FIG. 3 is a graph showing the skin horny area ratio in one embodiment of the present invention and Comparative Example 5. FIG.
4 is an image of the skin horny evaluation of an embodiment of the present invention and Comparative Example 5;

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are for further illustrating the present invention, and the scope of the present invention is not limited by these examples.

Manufacturing example  : Curd  Included Cosmetics  Method for producing a composition

The cosmetic compositions of Examples and Comparative Examples 1 to 5 were prepared under different conditions by combining the ingredients listed in Table 1 below.

Ingredients Content (total 100% by weight) One Cetearyl alcohol One 2 Glyceryl stearate and < RTI ID = 0.0 > 3 3 oil 10 4 milk To 100 5 Purified water 10 6 Lactic acid 0.5 7 1,2-hexanediol 2

The content of each component is as shown in Table 1, and the specific processes in the production of Examples and Comparative Examples 1 to 5 are as follows.

Example  : 75 ° C Adjudication , Lactic acid stock solution

First, an oil phase was prepared by mixing cetearyl alcohol, glyceryl stearate and fat-100 stearate, and oil and heating to 75 DEG C, and milk, purified water, and 1,2-hexanediol were mixed, To prepare the aqueduct. The oil phase was added to the aqueous phase and mixed for 5 minutes with HM5000RPM and 20Pd. Lactic acid was added as it was in the state where the homogenizer was operated at a temperature of 75 ° C, HM5000RPM, and 20Pd, followed by mixing for 3 minutes. Thereafter, the mixture was cooled to 28 deg. C and defoamed to prepare a cosmetic composition.

Comparative Example  1: No lactic acid input process

First, an oil phase was prepared by mixing cetearyl alcohol, glyceryl stearate and fat-100 stearate, and oil and heating to 75 DEG C, and milk, purified water, and 1,2-hexanediol were mixed, To prepare the aqueduct. Thereafter, the oil phase was added to the water phase, mixed with HM5000RPM and 20Pd for 5 minutes, cooled to 45 deg. C and defoamed. Thereafter, they were mixed at 45 DEG C for 3 minutes at a speed of HM5000RPM, 20Pd. The mixture was cooled to 28 ° C and defoamed to prepare a cosmetic composition.

Comparative Example  2: Lactic acid Pilot  After heating to 75 ° C

First, an oil phase was prepared by mixing cetearyl alcohol, glyceryl stearate and PGE-100 stearate, and oil and heating to 75 DEG C, and milk, purified water, 1,2-hexanediol, and lactic acid were added The water was heated to 75 DEG C to prepare an aqueous phase. Thereafter, the oil phase was added to the water phase, mixed with HM5000RPM and 20Pd for 5 minutes, cooled to 45 deg. C and defoamed. Thereafter, they were mixed at 45 DEG C for 3 minutes at a speed of HM5000RPM, 20Pd. Thereafter, the mixture was cooled to 28 deg. C and defoamed to prepare a cosmetic composition.

Comparative Example 3: 75 ° C Adjudication , Diluted lactic acid

First, an oil phase was prepared by mixing cetearyl alcohol, glyceryl stearate and fat-100 stearate, and oil and warming to 75 DEG C, mixing milk and 1,2-hexanediol, and warming to 75 DEG C The awards were prepared. The oil phase was added to the aqueous phase and mixed for 5 minutes with HM5000RPM and 20Pd. At the temperature of 75 ° C, HM5000RPM and 20Pd, the lactic acid dissolved in the purified water was added at a rate of 1 ml / 3s while the homogenizer was operated, followed by mixing for 3 minutes. Thereafter, the mixture was cooled to 28 deg. C and defoamed to prepare a cosmetic composition.

Comparative Example 4: 45 ° C Adjudication , Lactic acid stock solution

First, an oil phase was prepared by mixing cetearyl alcohol, glyceryl stearate and fat-100 stearate, and oil and heating to 75 DEG C, and milk, purified water, and 1,2-hexanediol were mixed, To prepare the aqueduct. After the oil phase was added to the water phase, it was mixed with HM5000RPM and 20Pd for 5 minutes, and then cooled to 45 deg. C and defoamed. At the temperature of 45 ° C, HM5000RPM, 20Pd, the lactic acid was put in the state where the homogenizer was operated at the speed and mixed for 3 minutes. Thereafter, the mixture was cooled to 28 deg. C and defoamed to prepare a cosmetic composition.

Comparative Example 5: 45 ° C Adjudication , Diluted lactic acid

First, an oil phase was prepared by mixing cetearyl alcohol, glyceryl stearate, and fat-100 stearate, and oil, followed by heating to 75 DEG C, mixing milk and 1,2-hexanediol, The water was prepared by heating. Thereafter, the oil phase was added to the water phase, mixed with HM5000RPM and 20Pd for 5 minutes, cooled to 45 deg. C and defoamed. At the temperature of 45 ° C, HM 5000RPM and 20Pd, the lactic acid dissolved in the purified water was added at a rate of 1 ml / 3s and the mixture was stirred for 3 minutes. Thereafter, the mixture was cooled to 28 deg. C and defoamed to prepare a cosmetic composition.

Table 2 below summarizes the differences in the processes of the above-described Examples and Comparative Examples 1 to 5.

fair Example Comparative Example One 2 3 4 5 Lactic acid input temperature (℃) 75 - 75 75 45 45 Pre-emulsification (front) - - ○ - - - After emulsification (add) ○ - - ○ ○ ○ Direct injection of lactic acid ○ - ○ - ○ - Dilution of lactic acid
(5% diluted solution of purified water) - - - ○ - ○ No lactic acid input process - ○ - - - -

Experimental Example  1: pH, viscosity, Feeling / Appearance, emulsion particle uniformity evaluation

The cosmetic compositions prepared in Examples and Comparative Examples 1 to 5 were evaluated for pH, viscosity, uniformity of emulsified particles, and scrub (gomage) formation.

The pH of the solution was measured immediately after addition of lactic acid.

The viscosity (cps, # 4, 30RPM) was evaluated by viscosity forming ability and the first-order viscosity was measured.

The uniformity of the emulsion particles was evaluated by a microscope and a particle size analyzer.

Uniformity: ◎

To some extent, uniformity:

Inhomogeneity: X

Whether or not the scrub (gomaju) was formed was visually observed whether the scrub (gomaju) was pushed out when the cosmetic composition was applied to the skin and then rubbed.

Created: ◎

Slightly generated: △

Not created: X

The measurement results are shown in Table 3.

Example Comparative Example One 2 3 4 5 pH 4.39 6.60 4.35 4.30 4.33 4.32 Viscosity 6100 2600 6000 6200 6100 6100 Emulsion particle uniformity X ◎ △ △ △ ◎ Whether scrub (gomaju) is generated ◎ X △ △ △ X

In the examples obtained by emulsifying the raw lactic acid solution at 75 캜, the emulsion particles were very uneven when compared with Comparative Examples 1 to 5, and it was confirmed that the scrub (gomaju) was pushed out when rubbed after applying to the skin (Figs. 1 and 2).

On the other hand, in Comparative Example 1 in which lactic acid was not added and in Comparative Example 5 in which lactic acid diluted at 45 ° C was added after emulsification, the emulsified particles were very uniform, Gomaju) did not come out at all.

In the case of Comparative Examples 2 to 4, the uniformity of emulsified particles was somewhat lowered after the addition of lactic acid, and the particles became larger, and it was confirmed that the scrub (gomaju) was pushed very weakly when rubbed after applying to the skin.

Experimental Example  2: Confirm skin irritation

The skin irritation degrees of the cosmetic compositions of Examples and Comparative Examples 1 to 5 were evaluated and shown in Table 4.

The skin irritation was assessed by visual inspection of the skin irritation after 24 hours after application of the sample to the inner part of the arm of 25 women in their 20s and 30s.

-: No erythema or unusual phenomenon

+ -: slightly reddish from the surroundings

+: Significantly reddened than surrounding

+ +: More reddened and swollen than around

The stimulus level is the number of subjects to be tested = [{(+ -) Number X 1} + {(+) Number X 2} + {(++)

sample
Number of test subjects (persons) Judgment result Irritation degree ++ + + - - Example 25 - - - 25 0.00 Comparative Example 1 25 - - One 24 0.04 Comparative Example 2 25 - - One 24 0.04 Comparative Example 3 25 - - - 25 0.00 Comparative Example 4 25 - - One 24 0.04 Comparative Example 5 25 - - - 25 0.00

As shown in Table 4, in the case of the examples, erythema or a specific phenomenon did not appear and it was confirmed that there was no irritation.

Experimental Example 3: Confirmation of exfoliation effect

The cosmetic composition of Example and Comparative Example 5 was evaluated for exfoliation effect.

The exfoliation evaluation was performed on the forearm in 5 to 20 women in their 30s and 30s by using the test product twice a day for 7 days followed by a wash-off.

Specifically, the D-Squame Disc was attached to the forearm evaluation area with a constant pressure for 5 seconds and then peeled off. Then, the sticker was peeled off using Visioscan VC 98, a magnifying image measuring instrument, After measuring the area as a percentage (%), the product was used for 7 days at the evaluation site and remeasured to determine the degree of reduction of the keratin.

At this time, the keratinization improvement rate (%) is an average value obtained by calculating the improvement rate of each evaluator, and the improvement rate (%) is as shown in equation (1).

[Formula 1]

X 100Improvement rate (%) =

X 100

FIG. 3 is a graph showing percent area ratios (%) of the skin of Examples and Comparative Example 5, and FIG. 4 is an image of skin crest evaluation images of Examples and Comparative Example 5.

Table 5 shows the reduction rate (%) of keratin in Examples and Comparative Example 5.

Example Comparative Example 5 Percent reduction of keratin (%) 21.13 12.64

As shown in Table 5, it was confirmed that the example shows a superior keratinization reduction rate as compared with Comparative Example 5.

In the case where the scrub (gomaju) is pushed out after rubbing after application to the skin, the scratch is remarkably improved on the 7th day after use compared to Comparative Example 5 in which scrub (gomaju) does not come out when the material is applied to the skin .

Claims (16)

(a) oil phase; And water to a temperature of 70 to 80 占 폚 and mixing them;
(b) further mixing an acid with the mixture at 70 to 80 占 폚; And
(c) cooling the mixture to 25 to < RTI ID = 0.0 > 30 C. <
Gt;
The method according to claim 1,
Wherein the cosmetic composition is for exfoliation.
The method according to claim 1,
Wherein the acid has a pH of 1 to 5. < Desc / Clms Page number 19 >
The method according to claim 1,
Wherein the step of mixing the acid comprises introducing the acid directly while stirring the mixture.
The method according to claim 1,
Wherein the cooling step further comprises defoaming.
The method according to claim 1,
Wherein the step of mixing the oil phase and water phase comprises introducing an oil phase into an aqueous phase containing milk.
The method according to claim 1,
Wherein the step of mixing the acid produces a curd.
8. The method of claim 7,
Wherein the curd has non-uniform particles.
The method according to claim 1,
Wherein the step of mixing the acid produces a scrub.
The method according to claim 1,
Wherein the oil phase further comprises at least one member selected from the group consisting of oils and emulsifiers.
The method according to claim 1,
Wherein the aqueous phase further comprises a preservative.
The method according to claim 1,
Wherein the acid is at least one selected from the group consisting of lactic acid, citric acid, fumaric acid, tartaric acid, succinic acid, maleic acid, malic acid, oxalic acid, ascorbic acid, aspartic acid, formic acid and glutamic acid.
13. A cosmetic composition for exfoliating, comprising a curd of uneven particles prepared according to any one of claims 1 to 12.
14. The method of claim 13,
Wherein the curd has a viscosity of 5000 to 7000 cps.
14. The method of claim 13,
Wherein the pH of the cosmetic composition is from 4 to 7.
14. The method of claim 13,
Wherein the particle size of the curd is from 1 to 10,000 mu m.

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