KR100589958B1 - Peel Off Type Pack Cosmetic Composition - Google Patents

Abstract

The present invention relates to a peel off type pack cosmetic composition. The composition according to the present invention increases the tensile strength of the film is not only easy to remove the pack agent but also excellent in antibacterial activity.

Description

Peel Off Type Pack Cosmetic Composition

The present invention relates to a peel-off pack cosmetic composition, and more particularly, by using chitosan and an inorganic salt in combination with polyvinyl alcohol (PVA), which is mainly used as a film forming agent for cosmetic pack products, to increase the tensile strength of the film. The present invention relates to a peel-off type pack cosmetic composition, which is characterized by easy removal of the pack agent and excellent antibacterial activity.

Pack is one of the cosmetics that has been used for a long time, and it helps to keep the skin healthy and beautiful through moisturizing action that keeps the skin moisturized, cleansing action that absorbs and removes skin contamination, and promotes blood circulation. These pack products are divided into various types according to the dosage form and the method of use. The first is a peel-off type to remove the film after drying, and the second is a tissue-off type to remove with tissue. off type), a third is a wash-off type for removing with water, and a fourth is an application type in which a nonwoven fabric is dipped in a lotion. Because they have advantages and disadvantages, researchers who prescribe products need to choose the right type of formulation for their various consumer preferences. Among them, the peel-off type product which peels off the film after drying is relatively used because of its ease of use. By the way, while the peel-off type pack product has the advantage of easy to use, there is a problem that the irritation is felt when peeling off after drying, or the strength of the film is weak, so that the peel off type pack is not easily removed.

On the other hand, in the conventional peel-off type pack products, a polymer component called PVA is mainly used as a film forming agent, and PVA has a problem in that the film is torn or the pieces of the film remain on the skin when the film has a weak tensile strength. In order to solve this problem, it is necessary to increase the content of PVA in the formulation, or to use other polymer materials such as polyvinylpyrrolidone (PVP), hydroxyethyl cellulose (HEC), carboxymethyl cellulose (CMC), and xanthan gum. It is common to mix and use. The content of PVA is usually 10 to 15% by weight. In order to significantly increase the tensile strength of the film, the content of PVA should be used at a high concentration of 15% by weight or more. However, when PVA is used at a high concentration of 15% by weight or more, the tensile strength of the film is increased, but the drying speed is slowed or the viscosity of the product is too high, so the spreadability is poor and the feeling of use is very bad. In addition, when using polymer materials such as PVP, HEC, CMC, xanthan gum and the like, the tensile strength of the film does not increase to a desired level, so it is difficult to fundamentally improve the film strength.

U.S. Patent No. 5,747,022 uses a mixture of PVA and lipophilic acrylate or methacrylate polymer material, which is only intended to speed up the drying, not to increase the tensile strength of the film. U.S. Patent No. 5,194,253 invents a cosmetic pack product containing ammonium hyaluronate, deoxyribohexane salt, etc., which also has a weak tensile strength and a slow drying speed. Japanese Patent Laid-Open No. 10-45531 invented a cosmetic pack product that knows the drying time by adding a silicone derivative to change the color of the film during drying. It is not related to increasing the tensile strength of the film except to make it known.

Although various efforts have been made by the inventors to improve the quality of cosmetic pack products, there has been no significant increase in tensile strength of the film to facilitate removal of the pack agent after drying.

Therefore, the inventors of the present inventors have made intensive studies to solve the problem that the film is torn or the film fragments remain on the skin when the pack agent is removed after drying when the pack product of the peel-off type is used. When the phosphorus chitosan and the inorganic salts are added, the tensile strength of the film is significantly increased, thereby solving the problem of tearing or film fragments remaining after removing the film and drying the film.

The present invention is a film forming agent of 7 to 20% by weight, preferably 10 to 15% by weight of polyvinyl alcohol, 0.1 to 5% by weight, preferably 0.5 to 3% by weight of chitosan to increase the tensile strength of the film and inorganic The present invention relates to a pack cosmetic composition of the peel-off type which is easy to remove the pack by increasing the tensile strength of the film, characterized by containing 0.05 to 3% by weight of salt, preferably 0.1 to 3% by weight.

The present invention also contains from 1 to 30% by weight of ethanol, preferably from 5 to 20% by weight, polyhydric alcohols from 1 to 20% by weight and the rest of the purified water to impart a moisturizing feel and to soften the film in order to promote the drying rate. .

PVA used in the present invention is a product of Nippon Synthetic Chemical Co., Ltd. and has a molecular weight of about 60,000 to 100,000, a saponification value of 86.5 to 89.0 mol%, sold under the trade name of Gosenol EG-25. It is becoming. If the amount is less than 7% by weight, the strength of the film is remarkably low, making it difficult to commercialize, and when used in excess of 20% by weight, the viscosity is very high and the usability is not good.

The chitosan used to increase the tensile strength of the film in the present invention is a cationic natural biopolymer material obtained by alkali deacetylation of chitin present in a large amount of squid bone, crab shell, etc. It is widely used as an adsorbent and health food. In the present invention, chitosan having a molecular weight of about 500,000 to 5,000,000 and a deacetylation degree of 80% or more, which is sold under the brand name HYDAGEN CMFP by Hekel, Germany, was used. If the amount is less than 0.1% by weight, the tensile strength of the film does not increase so much, and when it is used in excess of 5% by weight, solubility is poor, it is difficult to commercialize and the drying speed of the film is slow.

As the inorganic salt, purity of 95% or more used for cosmetics is used, and one or two or more selected from the group consisting of sodium chloride, potassium chloride, magnesium sulfate, and borax is used. It does not increase the strength very much, and when used in excess of 3% by weight, the film gels, resulting in poor usability.

In the present invention, when the ethanol is used in less than 1% by weight, the drying rate is not very fast, and when used in excess of 30% by weight, it is not preferable because it is irritating to the skin. In addition, the polyhydric alcohol uses one or two or more selected from the group consisting of glycerin, propylene glycol and 1,3-butylphenglycol, and when used below 1% by weight, the moisturizing effect is insignificant and the film is not soft. When using more than 20% by weight, the drying rate is too late.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the technical scope of the present invention is not limited in any way by these Examples.

Examples 1-3 and Comparative Examples 1-2

The following Examples 1 to 3 using the composition of Table 1 was prepared as follows. First, PVA was slowly added to the aqueous phase heated to 80 ℃ and mixed well for 30 minutes or more to disperse. After preparing a 5% by weight aqueous solution of lactic acid in a separate container, chitosan was added thereto, followed by heating and dissolving. The mixture was added slowly to an aqueous PVA solution and then mixed by addition of an ethanol phase, followed by cooling to room temperature to obtain a product. In the preparation of Comparative Examples 1 and 2, except that chitosan was dissolved in an aqueous lactic acid solution and added, the remainder was prepared in the same manner as in Examples 1 to 3.

TABLE 1

Example 4 and Comparative Examples 3 to 6

Using the compositions shown in Table 2 below, Example 4 and Comparative Examples 3 to 6 were prepared as follows. The remaining polymer component except PVA and chitosan was first dispersed in the aqueous phase heated to 80 ° C., and then PVA was dispersed, and the remaining processes were prepared in the same manner as in Examples 1 to 3.

TABLE 2

The drying time, tensile strength and antimicrobial activity test were carried out for the above Examples and Comparative Examples.

Drying time measurement

In order to measure the drying time of the film, a moisture analyzer (Moisture Analyzer, Satorius Model MA50) was used. First, 2 g of sample is precisely weighed and uniformly coated on an aluminum plate, the weight change is measured while evaporating moisture at 40 ° C., and the drying time is determined based on the time when there is no further weight change (drying). Table 3 shows.

TABLE 3

As can be seen from Table 3, the drying rate of the film did not increase so much as chitosan was added to the peel-off type pack containing PVA as a main component.

Tensile strength measurement of film

Tensile strength of the film was measured using a universal testing machine (Chatillon, Model Vitrodyne V1000). Each sample was applied to a constant thickness (0.1 mm) and then dried in a 40 ° C. thermostat for 30 minutes, and the resulting film was cut into a size of 1.5 × 1.5 cm 2 and subjected to a tension test (3 mm / sec) using a universal testing machine. . The point of time at which the film was cut due to the tensile force (force) was determined as the tensile strength, and the measurement results are shown in Table 4.

TABLE 4

As shown in Table 4, Example 4 containing the inorganic salt can be seen that the tensile strength of the film is significantly increased compared to Comparative Examples 3 to 6 that do not contain it.

Antibacterial test

In order to determine the antimicrobial activity of the examples and comparative examples, a challenge test according to the inoculation of microorganisms such as bacteria and fungi was conducted. As a test method, samples were added to the agar medium, inoculated with bacteria and fungi, and then stored in a thermostat, and the number of viable cells was measured after 1 day, 7 days, 14 days, 21 days, and 28 days. Bacteria were mixed with E. coli, Pseudomonas aeruginosa, Staphylococcus aureus, and fungi were Candida albicans and Aspergillus. A mixture of Niger (Aspergilus niger) was used.

TABLE 5a

TABLE 5b

As shown in Tables 5a and 5b it can be seen that the examples containing chitosan have superior antimicrobial activity as compared to other comparative examples containing no chitosan.

As described above, the composition according to the present invention increases the tensile strength of the film is not only easy to remove the pack agent but also excellent in antibacterial activity.

Claims (4)

A pack cosmetic composition comprising 7 to 20% by weight polyvinyl alcohol, 0.1 to 5% by weight chitosan and 0.05 to 3% by weight inorganic salt. The composition of claim 1, wherein the polyvinyl alcohol has a molecular weight of 60,000 to 100,000 and a saponification value of 86.5 to 89.0 mol%. The composition of claim 1, wherein the chitosan has a molecular weight of 500,000 to 5,000,000 and a degree of deacetylation of at least 80%. The composition according to claim 1, wherein the inorganic salt is in the form of one species selected from the group consisting of sodium chloride, potassium chloride, magnesium sulfate and borax.