KR20220084863A - Cosmetic composition capable of forming a film with excellent strength and cosmetic including the same - Google Patents

Abstract

It relates to a cosmetic composition capable of forming a film having excellent tensile strength and a cosmetic comprising the same, and more particularly, the cosmetic composition is characterized in that it adheres smoothly to the skin of the human body in a thin thickness and has excellent film strength.

Description

COSMETIC COMPOSITION CAPABLE OF FORMING A FILM WITH EXCELLENT STRENGTH AND COSMETIC INCLUDING THE SAME

The present invention relates to a cosmetic composition capable of forming a film having excellent tensile strength and a cosmetic comprising the same, and more specifically, the cosmetic composition is smoothly adhered to the skin of the human body in a thin thickness and has excellent film strength. do.

Skin cells are the first line of defense responsible for innate immunity and include all barriers of the skin and mucous membranes covering the surface of our body. The skin plays an important role in not only immunity, but also homeostasis such as thermoregulation and protection from external stimuli.

However, skin aging is easy due to ultraviolet rays, electromagnetic waves, stress, lack of moisture, etc., and when skin aging progresses, it is not good for health, but it is not good for aesthetics, so interest in skin anti-aging is increasing. In particular, since skin moisturizing is related to skin aging, interest in skin moisturizing is increasing.

On the other hand, after applying a skin moisturizing product, it is important to make the moisturizing effect last for a long time after application to the skin so that these moisturizing ingredients can exhibit a sufficient skin moisturizing effect. In addition, in modern society, there is an increasing demand for products with multiple functions at once rather than using various cosmetics in a busy life.

Korean Patent Publication No. 10-2018-0018904 relates to a mask pack cosmetic with improved adhesion and moisturizing power, and the contents (effective ingredients such as essence) deposited on the non-woven fabric sheet are gelled to increase the adhesion, and the contents such as essence flow. It is possible to improve the phenomenon of falling down or the nonwoven fabric sheet falling off, and as the nonwoven fabric sheet, which is a support, is gelled, the skin is elastically pulled and moisture persistence is increased, thereby improving adhesion and moisturizing power.

Korean Patent Laid-Open Publication No. 10-2016-0110769 relates to a gel mask pack composition, and the contents (effective ingredients such as essence) deposited on the nonwoven sheet are gelled, thereby increasing adhesion and reducing the flow or falling of the nonwoven sheet. It can enhance the effect of effective ingredients (contents such as essence) and increase activity during pack.

However, in the conventional mask packs, including the prior literature, there is no particular mention about maintaining the moisturizing component of the moisturizing agent for a long time. In addition, there is no particular mention about replacing several cosmetics having respective functions with one cosmetic. In addition, since the nonwoven fabric is used, it may be difficult to attach it for a long time, and there may be problems that the nonwoven fabric should be disposed of later.

In other words, if you live a busy life, modern people are in need of products with multiple functions at once rather than using various cosmetics. In addition, in the case of the mask pack disclosed in the above literature, it is generally not possible to lead a daily life with the mask pack attached, so the need for cosmetics that enables external activities after application to the skin like a normal skin This is being discussed.

Accordingly, the present inventors developed a cosmetic composition containing polyurethane and acrylate having excellent adhesion to the skin while researching to solve the above problems, and the cosmetic composition as described above is applied to the skin of the human body with a thin thickness. The present invention was completed by discovering that it adheres smoothly, can maintain a moisturizing effect for a long time, and maintain excellent strength.

The present invention has been devised to solve the problems of the prior art, and an object of the present invention is to provide a cosmetic composition comprising a polymer solution, polyurethane (PU) and acrylate.

Another object of the present invention is to provide a cosmetic comprising the cosmetic composition.

As a technical means for achieving the above-described technical problem, one aspect of the present invention is,

polymer solution; polyurethane (PU); and acrylate; and provides a cosmetic composition comprising, a tensile strength of 300 gf/25 mm to 600 gf/25 mm.

Based on 100 parts by weight of the polymer solution, the content of the polyurethane (PU) may be 1 to 10 parts by weight.

Based on 100 parts by weight of the polymer solution, the content of the acrylate may be 1 to 10 parts by weight.

The polymer solution may include a solvent and polyvinyl alcohol (PVA).

Based on 100 parts by weight of the solvent, the content of the polyvinyl alcohol (PVA) may be 1 to 10 parts by weight.

The weight average molecular weight of the polyurethane (PU) may be 50,000 to 100,000, and the weight average molecular weight of the polyvinyl alcohol (PVA) may be 50,000 to 100,000.

The cosmetic composition may further include a moisturizing agent.

The content of the moisturizing agent may be 100 to 300 parts by weight based on 100 parts by weight of the polymer solution.

The cosmetic composition may form a film that prevents moisture evaporation when applied to the skin.

The film may be physically and uniformly removable, or may be washed with an aqueous solution.

The cosmetic composition may further include at least one additive selected from the group consisting of preservatives, whitening agents, sunscreens, antioxidants, wrinkle improving agents, fragrances, pigments, and combinations thereof.

The adhesive force of the cosmetic composition may be 100 gf/25 mm to 400 gf/25 mm.

In addition, another aspect of the present invention,

It provides a cosmetic comprising the cosmetic composition.

The cosmetic composition according to the present invention as described above is smoothly adhered to the skin of the human body with a thin thickness, and has high strength, so it can have an effect of maintaining a moisturizing effect for a long time. In addition, the cosmetic composition may form a film on the applied surface, that is, the applied skin (hereinafter, skin). Therefore, it is possible to prevent problems such as peeling or cracking of the coating due to high strength, and when physically removing it, the entire coating may be easily removed without being fragmented.

In addition, by forming the film, there is an effect of blocking external contaminants such as fine dust adhering to the skin, and may have a UV blocking function or a blue light blocking function. In addition, depending on the additive added to the cosmetic composition, it may further exhibit effects such as a whitening function and a wrinkle improvement function.

Finally, the film has a property of being easily soluble in an aqueous solution, for example, water. Therefore, when the film is to be removed, it may be very convenient because it can be removed by simply washing with an aqueous solution or the like.

1 is a photograph showing an excellent degree of peeling after 8 hours of a cosmetic composition according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail. However, the present invention may be embodied in various different forms, and the present invention is not limited by the embodiments described herein, and the present invention is only defined by the claims to be described later.

In addition, the terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the entire specification of the present invention, 'including' any component means that other components may be further included, rather than excluding other components, unless otherwise stated.

The first aspect of the present application is

polymer solution; polyurethane (PU); and acrylate; and provides a cosmetic composition comprising, a tensile strength of 300 gf/25 mm to 600 gf/25 mm.

The second aspect of the present application is

It provides a cosmetic comprising the cosmetic composition.

Hereinafter, the cosmetic composition according to the first aspect and the cosmetic according to the second aspect of the present application will be described in detail.

In one embodiment of the present application, the cosmetic composition may be used in cosmetics that are generally applied to the skin, and the cosmetic composition may preferably have a liquid or semi-solid formulation. On the other hand, the cosmetic composition may be used directly on the skin to which nothing is applied, or it may be used together in the step of using a skin, essence, lotion, cream, etc. commonly used as basic cosmetics, or it may be used after the use of basic cosmetics. .

In one embodiment of the present application, the cosmetic composition may have an excellent tensile strength of 300gf/25mm to 600gf/25mm. Therefore, since it is smoothly applied to the skin of the human body with high strength, there may be no problems such as cracking or tearing. That is, after the cosmetic composition is applied to the skin, even if the user makes a large movement, it is not easily peeled off or damaged, so that the excellent effect can be continuously maintained. In addition, when it is physically removed, the entire film can be easily removed without fragmentation, thereby preventing problems such as requiring additional washing. In particular, in the case of a user with atopic dermatitis or dry skin, it may be possible to maintain an excellent moisturizing effect for a long time by applying the cosmetic composition to any part of the body including the face.

On the other hand, the tensile strength may be measured by a method of measuring the tensile strength of a material by applying a tensile load to the specimen using a tensile tester. The specimen had a size of 1 inch x 10 cm and the test speed was 12 inch/min. Since the cosmetic composition according to the present invention has excellent tensile strength by including polyurethane and acrylate, there is an effect that it is not easily torn when applied to the skin.

In one embodiment of the present application, the cosmetic composition may include a polymer solution. In this case, the polymer solution may include a solvent and polyvinyl alcohol (PVA). That is, since the polymer solution contains polyvinyl alcohol (PVA), the cosmetic composition may have excellent moisturizing power.

In one embodiment of the present application, the cosmetic composition may include polyurethane (PU) and acrylate. Since the polyurethane (PU) has excellent adhesion to the skin of the human body, the cosmetic composition including the same may be smoothly adhered to the skin with a thin thickness. In addition, since the polyurethane (PU) has a UV blocking function The cosmetic composition including the same may also have an excellent UV protection effect. On the other hand, the acrylate may be added to improve adhesion to the skin as an organic thickener, and the cosmetic composition may have excellent tensile strength by further including acrylate. In this case, the acrylate may be an acrylate/C10-30 alkyl acrylate crosspolymer.

In one embodiment of the present application, the cosmetic composition may have a viscosity of 10,000 to 40,000 cps. If the viscosity of the cosmetic composition is less than 10,000 cps, its strength is too weak to achieve the effect of the cosmetic composition having high strength characteristic of the present invention as described above, and when it exceeds 40,000 cps, fluidity compared to when within the above range This is low, and there is a possibility of forming a thick film.

In one embodiment of the present application, the cosmetic composition may be in liquid or semi-solid form. The cosmetic composition preferably has a thin liquid or semi-solid formulation, such as cosmetics often called "skin" or "essence". Since the cosmetic composition has a thin liquid or semi-solid formulation, it can have an advantageous effect in forming a thinner film compared to a high viscosity formulation often called “cream” or “gel”.

In one embodiment of the present application, based on 100 parts by weight of the polymer solution, the content of the polyurethane (PU) may be 1 to 10 parts by weight, preferably 3 to 7 parts by weight, more preferably 5 to 6 parts by weight. When the content of the polyurethane (PU) is less than 1 part by weight relative to 100 parts by weight of the polymer solution, the content of the polyurethane (PU) is too small, and the intrinsic effect that can be expressed by including the polyurethane (PU) as described above may not appear, and when it is more than 10 parts by weight, the content of the polymer solution containing polyvinyl alcohol (PVA) is relatively small, which may cause a problem in that the moisturizing effect is lowered.

In one embodiment of the present application, with respect to 100 parts by weight of the polymer solution, the content of the acrylate may be 1 to 10 parts by weight, preferably 4 to 8 parts by weight, more preferably 6 parts by weight. It may be in an amount of parts to 7 parts by weight. When the content of the acrylate is less than 1 part by weight relative to 100 parts by weight of the polymer solution, the effect that can be expressed by adding the acrylate as described above may not appear, and when it is more than 10 parts by weight, relatively polyvinyl alcohol ( The content of the polymer solution containing PVA) may be too small, which may cause a problem in that the moisturizing effect is lowered.

In one embodiment of the present application, the polymer solution may include a solvent and polyvinyl alcohol (PVA), wherein the solvent may be used without limitation as long as it is a solvent commonly used in cosmetics, preferably purified water, A solvent selected from the group consisting of hot spring water, glycerin, phenoxyethanol, hexanediol, and combinations thereof may be used.

In one embodiment of the present application, based on 100 parts by weight of the solvent, the content of the polyvinyl alcohol (PVA) may be 1 to 10 parts by weight, preferably 5 to 10 parts by weight, more preferably It may be 6 to 8 parts by weight. When the content of the polyvinyl alcohol (PVA) is less than 1 part by weight relative to 100 parts by weight of the solvent, the content of polyvinyl alcohol (PVA) is too low, so that the polymer solution containing it and the polyurethane (PU) are smoothly mixed There may be a problem of not losing weight, and when it is more than 10 parts by weight, the content of the solvent is relatively small, so that a problem in dispersibility with the solvent may occur.

In one embodiment of the present application, the total content of the polyurethane (PU), polyvinyl alcohol (PVA) and acrylate may be 1 to 10 parts by weight based on 100 parts by weight of the total cosmetic composition, preferably 4 to 10 It may be a part by weight, and most preferably, may be 6 to 8 parts by weight. If the total content of the polyurethane (PU), polyvinyl alcohol (PVA) and acrylate is out of the above range, the cosmetic composition containing them may not be able to express unique effects such as excellent strength, moisturizing effect, and UV blocking function. have.

In one embodiment of the present application, the weight average molecular weight of the polyurethane (PU) may be 50,000 to 100,000, and the weight average molecular weight of the polyvinyl alcohol (PVA) may be 50,000 to 100,000. When the weight average molecular weight of the polyurethane (PU) is less than 50,000 or more than 100,000, or when the weight average molecular weight of polyvinyl alcohol (PVA) is less than 50,000 or more than 100,000, the moisturizing effect of the cosmetic composition is can be lowered In addition, when the weight average molecular weight of the polyurethane (PU) and polyvinyl alcohol (PVA) is within the above range, the cosmetic composition including them may have excellent elongation, elasticity, adhesion and breathability.

In one embodiment of the present application, the cosmetic composition may further include a moisturizing agent. The moisturizing agent may be one using commonly used moisturizing ingredients, for example, propylene glycol (Propylene Glycol), hexanediol (1,2-Hexanediol), trehalose (Trehalose), betaine (Betaine), Trimethylglycine, Caprylyl Glycol, Butylene Glycol, Aloe vera, Allantoin, Lactic Acid, Cetyl Alcohol, Arginine, Arbutin, Adenosine, Niacinamide, amino acid, cetearyl alcohol, ceramide (Ceramide), phenoxyethanol, hyaluronic acid (oligomer), hyaluronic acid (polymer), sodium PCA (sodium-PCA), hydrogenated castor oil (castor oil), It may be to use a material selected from the group consisting of jojoba oil, petrolatum, mineral oil, vegetable oil, collagen, and combinations thereof. Preferably trehalose, betaine, arginine, allantoin, arbutin, adenosine, niacinamide, amino acids, hyaluronic acid (oligomer), hyaluronic acid (polymer), hexanediol (1,2-Hexanediol) ), phenoxyethanol, citric acid, and a material selected from the group consisting of combinations thereof may be used. At this time, the hyaluronic acid (oligomer) makes the hyaluronic acid (polymer) ultra-low molecular to facilitate absorption into the skin, maximizes the skin moisturizing effect, and at the same time activates the epidermal stem cell ability, and promotes differentiation into skin cells. It may be one having an effect of preventing skin aging by promoting it.

In one embodiment of the present application, the content of the moisturizing agent may be 100 to 300 parts by weight based on 100 parts by weight of the polymer solution, preferably 100 to 200 parts by weight, more preferably 140 to 160 parts by weight. It may be parts by weight. When the content of the moisturizing agent is less than 100 parts by weight relative to 100 parts by weight of the polymer solution, the moisturizing effect of the cosmetic composition including it may be insignificant because the content of the moisturizing agent is too small, and when it is more than 300 parts by weight, relatively polymer solution, polyurethane And the content of the acrylate is reduced, and the inherent effect that can be expressed by including it may not appear.

On the other hand, the moisturizing ingredients may be mixed with a solvent, and the solvent is the same as the solvent included in the polymer solution, which is a group consisting of purified water, hot spring water, glycerin, phenoxyethanol, hexanediol, and combinations thereof. A solvent selected from may be used.

In one embodiment of the present application, preferably, the moisturizer is based on 60 parts by weight of the solvent, 10 to 20 parts by weight of the trehalose, 1 to 10 parts by weight of the betaine, 0.001 to 0.005 parts by weight of the arginine, 0.1 to 0.1 to the allantoin 0.5 parts by weight, the arbutin 0.5 to 3 parts by weight, the adenosine 0.1 to 0.5 parts by weight, the niacinamide 1 to 10 parts by weight, the amino acid 1 to 10 parts by weight, the hyaluronic acid (oligomer) 0.5 to 3 parts by weight, the It may include 5 to 15 parts by weight of hyaluronic acid (polymer), 0.1 to 3 parts by weight of the hexanediol (1,2-Hexanediol), and 0.1 to 1 parts by weight of the phenoxyethanol. More preferably, based on 60 parts by weight of the solvent, 15 parts by weight of the trehalose, 5 parts by weight of the betaine, 0.002 to 0.004 parts by weight of the arginine, 0.2 parts by weight of the allantoin, 1 part by weight of the arbutin, 0.2 parts by weight of the adenosine , The niacinamide 1 to 5 parts by weight, the amino acid 1 to 5 parts by weight, the hyaluronic acid (oligomer) 1 part by weight, the hyaluronic acid (polymer) 9 parts by weight, the hexanediol (1,2-Hexanediol) 1 weight parts and 0.5 parts by weight of the phenoxyethanol.

Based on 60 parts by weight of the solvent, the trehalose is included in less than 10 parts by weight or more than 20 parts by weight, the betaine is included in less than 1 part by weight or more than 10 parts by weight, or the arginine is less than 0.001 parts by weight or 0.005 parts by weight is included in excess of parts, or less than 0.1 parts by weight or more than 0.5 parts by weight of allantoin, less than 0.5 parts by weight or more than 3 parts by weight of arbutin, or less than 0.1 parts by weight or more than 0.5 parts by weight of adenosine Or, the niacinamide is included in less than 1 part by weight or more than 10 parts by weight, or the amino acid is included in less than 1 part by weight or more than 10 parts by weight, or the hyaluronic acid (oligomer) is less than 0.5 parts by weight or 3 parts by weight Included in excess, the hyaluronic acid (polymer) is included in less than 5 parts by weight or more than 15 parts by weight, or the hexanediol is included in less than 0.1 parts by weight or more than 3 parts by weight, or the phenol siethanol is 0.1 parts by weight When included in less than 1 part by weight, the moisturizing effect of the cosmetic composition may be reduced. In addition, when out of the above range, the elongation, elasticity, adhesion and breathability of the cosmetic composition including the same may be deteriorated.

In one embodiment of the present application, the trehalose has a cell membrane protection, moisture evaporation prevention and antioxidant effect, the betaine is a moisturizing effect, the allantoin is a skin moisturizing and soothing effect, the arbutin is a whitening and whitening effect, and the adenosine is Anti-inflammatory and anti-wrinkle effect, the niacinamide has a whitening function, the amino acid has a moisturizing effect, the hyaluronic acid has a moisturizing and wound healing effect, the hexanediol has a moisturizing and preserving effect, and the phenoxyethanol has an antiseptic effect. have.

In one embodiment of the present application, the oils may include at least one selected from jojoba, macadamia, vitamin E acetate, polysorbate 80, and caprylic/capric triglyceride.

In one embodiment of the present application, the oils are based on 40 parts by weight of the macadamia, 20 to 40 parts by weight of the jojoba, 1 to 10 parts by weight of the vitamin E acetate, 10 to 20 parts by weight of the polysorbate 80 and 10 to 20 parts by weight of the car It may contain 5 to 15 parts by weight of prilic/capric triglyceride. Preferably, based on 40 parts by weight of the macadamia, 30 parts by weight of the jojoba, 5 parts by weight of the vitamin E acetate, 15 parts by weight of the polysorbate 80, and 10 parts by weight of the caprylic/capric triglyceride. have. Based on 40 parts by weight of the macadamia, the jojoba is included in less than 20 parts by weight or more than 40 parts by weight, or the vitamin E acetate is included in less than 1 part by weight or more than 10 parts by weight, or the polysorbate 80 is 10 When included in less than 20 parts by weight or in excess of 20 parts by weight, or when the caprylic/capric triglyceride is included in less than 5 parts by weight or more than 15 parts by weight, the moisturizing effect of the cosmetic composition may be reduced. In addition, when out of the above range, the elongation, elasticity, adhesion and breathability of the cosmetic composition including the same may be deteriorated.

In one embodiment of the present application, the macadamia and the jojoba serve as a moisturizing agent, the vitamin E acetate has an antioxidant effect, the polysorbate 80 serves as a solubilizer and an emulsifier, and the caprylic/capric triglyceride is a moisturizing agent and serving as a preservative.

In one embodiment of the present application, the cosmetic composition may have a pH of 5 to 8, preferably 5.5 to 6. If the pH is less than 5 or exceeds 8, the range may be appropriate because it may cause sensitive skin irritation.

In one embodiment of the present application, the cosmetic composition may further include at least one additive selected from the group consisting of preservatives, whitening agents, sunscreens, antioxidants, wrinkle improving agents, fragrances, pigments, and combinations thereof. have. In addition, caffeine, aloe vera leaf juice, carbomer, octafluoropentyl methacrylate, myristoyl pentapeptide-11, kaolin, bentonite, cholesterol, lecithin, capryl glycol, apple cell culture extract, myristoyl pentapeptide -8, Ethylhexylglycerin, King tangerine seed extract, Silk amino acid, Acetylhexapeptide-8, H-polypeptide-11, S H-oligopeptide-1, Ethyl Ascorbyl Ether, Licorice extract, Vitamin C, It may further include a material selected from the group consisting of coenzyme, sorbitol, methylparaben, propylparaben, methylpropanediol, phenylpropanol, retinol, fragrance, and combinations thereof.

In one embodiment of the present application, the cosmetic composition may further include a thickener. The thickener is a material that increases the viscosity, and may mean a material that increases the viscosity by adding it to a colloidal solution, a polymer solution, or the like. The thickener may include xanthan gum, cellulose gum, polyacrylamide, gum arabic, tragacanth gum, galactan, pectin, quince seed extract, brown algae powder, dextran, pullulan, succinoglycan, casein, Albumin, polyvinyl methyl ether, glycyrrhizin acid, glycyrrhizinate, alginic acid, alginic acid salt, and may further include a material selected from the group consisting of combinations thereof.

In one embodiment of the present application, the adhesive strength of the cosmetic composition may be 100gf/25mm to 400gf/25mm, preferably 300gf/25mm to 400gf/25mm, more preferably 350gf/25mm to 400gf/ It may be 25 mm. In principle, the adhesive strength is obtained by adhering the test piece tape to a stainless steel plate of a certain size from which foreign substances are removed after curing for a certain period of time by meeting the constant temperature and humidity conditions of the standard using a roller of a certain load (2 kg), It may be measured by the test method of measuring the load value or strength value by peeling it with The cosmetic composition according to the present invention may include polyurethane (PU) and acrylate, and thus have excellent adhesion and thus have an effect of well adhering to the skin.

In one embodiment of the present application, the cosmetic composition may have an elongation of 150 to 300%, preferably having an elongation of 250%. Meanwhile, the elongation may be measured by applying a tensile load to the specimen using a tensile tester to measure the elongation of the material. The specimen had a size of 1 inch x 10 cm and the test speed was 12 inch/min. The cosmetic composition according to the present invention may include polyurethane and acrylate, thereby increasing elongation and thus having excellent elasticity.

In one embodiment of the present application, the cosmetic composition may have an air permeability of 500 to 20,000 g/m ² in 24 hrs. In this case, the air permeability may be measured by a method of measuring the amount of air permeated or the air flow rate for a predetermined area for a predetermined time by allowing air to pass vertically under a predetermined area and pressure of the prepared film. That is, the air permeability of the cosmetic composition as described above represents an air permeability value almost similar to that of artificial skin, and the user may feel comfortable due to the excellent air permeability when applying it to the skin.

In one embodiment of the present application, the cosmetic composition may form a film that prevents moisture evaporation when applied to the skin. That is, the cosmetic composition may form a film when applied to the skin, and when it is applied on other cosmetics, there may be an effect of preventing evaporation of the active ingredient contained in the cosmetic due to the formed film. Therefore, the user primarily applies the cosmetic to the skin, and then, by additionally applying the cosmetic composition, the active ingredient contained in the primarily applied cosmetic is not evaporated to achieve the effect of being well absorbed into the skin. can On the other hand, since the cosmetic composition forms a film, it may be possible to block external contaminants such as fine dust physically adhering to the skin, and may have a UV blocking function or a blue light blocking function. In addition, it may exhibit effects such as a whitening function, a wrinkle improvement function, etc. depending on the additive added additionally. In addition, the cosmetic composition may also have the effect of increasing the luster of the skin because it forms a film having a constant surface by filling the curves formed on the skin, that is, the skin irregularities.

In one embodiment of the present application, the film (film) formed by the cosmetic composition may be physically and uniformly removable or may be washed with an aqueous solution. That is, since the cosmetic composition has excellent strength, the entire film may be easily removed without being physically fragmented when removing it, and since it is formed of water-soluble substances, it may be removed even by washing with an aqueous solution. . Accordingly, the user can physically remove the film using his/her hands when removing the film or easily remove it by washing face, which may be more convenient.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in several different forms and is not limited to the embodiments described herein.

Example . cosmetics Preparation of the composition (PU, PVA and acrylate include)

A cosmetic composition was prepared by mixing the compositions shown in Table 1 below.

[Table 1]

On the other hand, the moisturizing agent was prepared by mixing the compositions shown in Table 2, and the content ratio thereof is also shown in Table 2 below.

[Table 2]

comparative example . cosmetics Preparation of the composition (polyurethane and acrylate included X)

A cosmetic composition was prepared in the same manner as in the above example, except that polyurethane (PU) and acrylate were not included, and the content of polyvinyl alcohol was 7.05 wt% and mixed.

Experimental example 1. Skin improvement sensory test

In order to examine the effect of the cosmetic composition prepared according to the above example on skin change, a skin application test was performed as follows. The cosmetic composition according to the example was applied to the skin of a group consisting of 10 subjects (10 females) in their 10s to 50s who did not usually have skin diseases or allergies. After about 20 minutes, a questionnaire was conducted using a 5-point item scale method (5 points: very good, 4 points: good, 3 points: average, 2 points: bad, 1 point: very bad) for the moisturizing power and skin elasticity of the test site. received, and the results are shown in Tables 4 and 5 below.

[Table 3]

As shown in Table 3, it was confirmed that the cosmetic composition according to the embodiment of the present invention had a uniformly excellent effect in terms of spreadability, moisturizing, whitening, gloss, and skin elasticity when applied to the actual skin, and in particular, spreadability, moisturizing and It was confirmed that an excellent effect was exhibited in terms of gloss.

Experimental example 2. Adhesion test

In order to measure the adhesive strength of the cosmetic compositions prepared in the Examples and Comparative Examples, a roller of a certain load (2 kg) is used on a stainless steel plate of a certain size from which foreign substances are removed after curing for a certain time by satisfying the standard constant temperature and constant humidity conditions. The test piece tape was adhered and peeled at 180° or 90° to measure the load value or strength value, and the results are shown in Table 6 below.

[Table 4]

As shown in Table 4, it was confirmed that the cosmetic composition prepared according to the example of the present invention had an adhesive strength of about 390 gf/25mm, which was very excellent compared to the comparative example showing 180 gf/25mm. It was determined that this is because the cosmetic composition contains polyurethane (PU) and acrylate.

Experimental example 3. Tensile strength and elongation measurement experiment

In order to measure the tensile strength and elongation of the cosmetic compositions prepared in Examples and Comparative Examples, a tensile load was applied to the specimen using a tensile tester to measure the tensile strength and elongation of the material, and the results are shown in Table 5 below. . At this time, the size of the specimen was 1 inch x 10 cm, and the test speed was conducted under the condition of 12 inch/min.

[Table 5]

As shown in Table 5, it was confirmed that the cosmetic composition according to the embodiment of the present invention had higher tensile strength and elongation compared to the comparative example. Therefore, it can be inferred that the film formed when the cosmetic composition is applied to the skin is not easily damaged because it has a high tensile strength, and can have excellent flexibility by having a high elongation. Therefore, it was expected that the film would be able to maintain its shape well even if the user makes a large movement after applying it.

Experimental Example 4. Peeling degree measurement experiment

In order to measure the excellent degree of peeling of the cosmetic composition prepared in the above example, a photograph is taken after the cosmetic composition is applied to the skin (face) of the human body (upper photograph in Fig. 1), and a photograph of peeling it after 8 hours (Fig. 1) is shown in FIG. 1 .

As shown in FIG. 1, it was confirmed that the cosmetic composition prepared according to the embodiment of the present invention was well applied to the skin (face) of the human body, and it did not break even when peeled off afterwards, and it was confirmed that the entire film was well peeled. .

Above, the present invention has been described in detail with preferred embodiments with reference to the drawings, but the scope of the technical idea of the present invention is not limited to these drawings and examples. Accordingly, various modifications or equivalent ranges of embodiments may exist within the scope of the technical spirit of the present invention. Therefore, the scope of the technical idea according to the present invention should be interpreted by the claims, and the technical idea within the equivalent or equivalent scope should be interpreted as belonging to the scope of the present invention.

Claims (13)

polymer solution; polyurethane (PU); and acrylate;
A cosmetic composition, characterized in that the tensile strength is 300gf/25mm to 600gf/25mm.
According to claim 1,
Based on 100 parts by weight of the polymer solution, the content of the polyurethane (PU) is a cosmetic composition, characterized in that 1 to 10 parts by weight.
According to claim 1,
Based on 100 parts by weight of the polymer solution, the cosmetic composition, characterized in that the content of the acrylate is 1 to 10 parts by weight.
According to claim 1,
The polymer solution is a cosmetic composition comprising a solvent and polyvinyl alcohol (PVA).
5. The method of claim 4,
Based on 100 parts by weight of the solvent, the content of the polyvinyl alcohol (PVA) is 1 to 10 parts by weight of the cosmetic composition.
5. The method of claim 4,
The weight average molecular weight of the polyurethane (PU) is 50,000 to 100,000, and the weight average molecular weight of the polyvinyl alcohol (PVA) is 50,000 to 100,000 cosmetic composition.
According to claim 1,
The cosmetic composition further comprises a moisturizing agent.
8. The method of claim 7,
The content of the moisturizing agent is a cosmetic composition, characterized in that 100 to 300 parts by weight based on 100 parts by weight of the polymer solution.
According to claim 1,
The cosmetic composition is a cosmetic composition, characterized in that to form a film that prevents moisture evaporation when applied to the skin.
10. The method of claim 9,
The film is physically and uniformly removable, or a cosmetic composition, characterized in that it can be washed with an aqueous solution.
According to claim 1,
The cosmetic composition further comprises at least one additive selected from the group consisting of preservatives, whitening agents, sunscreens, antioxidants, wrinkle improving agents, fragrances, pigments, and combinations thereof.
According to claim 1,
The cosmetic composition has an adhesive strength of 100 gf/25 mm to 400 gf/25 mm.
A cosmetic comprising the cosmetic composition of claim 1.

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