KR100301078B1 - Cosmetic composition for foot care - Google Patents

Abstract

The present invention is formulated with an appropriate amount of one or two or more of the base of the alpha hydroxy acids (AHA) or salts thereof and an antimicrobial cosmetic pigment, thereby preventing skin keratinization by promoting moisturizing effect and exfoliation. To improve the skin exfoliation of the soles through, as well as excellent sterilization function foot care excellent cosmetic composition for foot care.

Description

[Name of invention]

Cosmetic composition for foot care

[Purpose of invention]

The present invention relates to a cosmetic composition for foot care. More specifically, the present invention is formulated by combining an appropriate amount of one or two or more of the base of the alpha hydroxy acids (AHA) or salts thereof and a gel base containing an antimicrobial cosmetic pigment, thereby promoting moisturizing effect and exfoliation. The present invention relates to a cosmetic composition for foot care that is excellent in removing foot odor with an excellent sterilization function as well as improving skin keratin of the sole by preventing skin keratinization.

[Technical field to which the invention belongs and the prior art in that field]

In general, cosmetics refers to an article used by painting, spraying or the like in order to clean or beautify the human body and keep skin or hair healthy, and has a slight effect on the human body. However, the skin of the human body varies depending on various factors, such as individual, site, season, age, etc., and various products, such as detergent, lotion, milk, cream, gel, essence, etc. Products are available on the market, most of them for face, hand and whole body.

Recently, along with the development of science and technology and economic abundance, cosmetics suitable for the characteristics of each part of the body, ie, around the eyes, the neck, the chest, the legs, and the products for development are also commercially available. By the way, the most vulnerable and skin-care area of the human body so far is the foot, especially the part that absorbs shock from the outside and acts as a balance and lever for blood. Despite the concentration of the circulatory organs, there was a lack of attention because it was the most easily polluted, dirty, and smelly part of the body, and depending on age and season, especially when the weather became cold and dry, keratin of the soles occurred and cracked. In severe cases, there are many cases of abnormal symptoms accompanied by scars and pains.

Unlike general cosmetics, these foot care products require several functions, that is, the skin at the bottom of the foot has a strong moisturizing function because there are no hair follicles and sweat glands. The effect should be excellent, and because it is easy to be contaminated by microorganisms, the antiseptic sterilization function should be excellent, but also have a good feeling without stickiness or oil.

However, it is very difficult to manufacture a product with all the necessary functions mentioned above, and various foot care products have been proposed so far, but it is not satisfactory. In other words, US Patent No. 44454949 gives a foot care cosmetic composition a microbial contamination using various organoaluminum composites. However, except for the antiseptic function of microorganisms, it prevents hyperangularity and moisturizing effect on the skin of the foot. U.S. Patent No. 4,434,43 claims that the mixture of magnesium sulfate, sodium chloride, papaya enzyme, salicylic acid and clay to remove hyperkeratinized keratinocytes and softens the skin. Weak.

On the other hand, U.S. Patents No. 5,556,811 and 45,50035 show that softeners, fragrances and absorbent powders, deodorants, such as talc, zeolites, soy protein, borax, silica, starch, etc., are effective in removing odors and moisturizing the feet. It has been proposed, but this is not so great moisturizing function and bad feeling, that is, it is not absorbed quickly on the skin and has a lot of sticky disadvantages, it is not suitable as a foot care cosmetic. EP 489524 proposes that emulsions containing polymer composites and polyacrylates exhibit excellent moisturizing effects as foot care cosmetics, but this also has limitations in improving dry skin of the feet.

In addition, although World Patent No. 95128849 suggests that the composition based on starch, which is a polymer material, is excellent as a foot care cosmetic, it has little function as a foot care cosmetic except that it is not sticky and neat, so it is recognized as a foot care cosmetic. it's difficult. US Patent No. 5209932 proposes a cosmetic using a fine porous powder, but also did not solve the fundamental problems such as drying phenomenon of the skin of the skin and preservation of microorganisms. In Japanese Patent No. 81133434, an antiseptic agent derived from an undecylenic acid was applied, but it did not give the function as the foot care cosmetics mentioned above.

[Technical problem to be achieved]

Accordingly, the present inventors have intensively researched to solve various problems of the prior art and invent a composition having all functions as a foot care cosmetic, and as a result, one or two or more of the alpha hydroxy acids or salts thereof and the antimicrobial cosmetics By formulating an appropriate amount of gel base containing a pigment for the development of the moisturizing, anti-keraking and foot odor removal effect, but has developed a cosmetic composition dedicated to the foot care excellent in use.

[Configuration and Function of Invention]

The present invention is a cosmetic composition for foot care, characterized in that the formulation of one or two or more of the alpha hydroxy acid or salts thereof in a gel base containing 0.1 to 15.0 parts by weight and an antimicrobial cosmetic pigment 0.5 to 30.0 parts by weight. It is about.

The alpha hydroxy acid used in the present invention refers to acids having a hydroxyl group (-OH) at the alpha carbon position as acids having the following general formula. For example, glycolic acid, lactic acid, malic acid, The hydroxybutyric acid and the like, these are excellent components of keratin exfoliation, cell regeneration, moisturizing, anti-aging effect, which is widely used in cosmetics recently, the structural formula is as follows.

The salt of alpha hydroxy acid refers to the neutralization of alpha hydroxy acid with alkali, that is, sodium hydroxide, potassium hydroxide, etc., and these are used for the purpose of controlling the pH of the preparation and alleviating irritation. According to hydroxy acid. As the salt of alpha hydroxy acid, sodium glycolate, potassium glycolate, sodium lactate, potassium lactate, sodium hydroxybutyrate, potassium hydroxybutyrate, sodium malate or potassium malate can be used.

Meanwhile, in the present invention, the gel base containing the antimicrobial cosmetic pigment refers to a dispersion of the antimicrobial cosmetic pigment in a water-soluble gel composed of xanthan gum, glycerin, diethylene glycol ether and octylene glycol. Here, the pigment for antimicrobial cosmetics is developed by LG Chemical Co., Ltd., and the surface of inorganic pigment for cosmetics such as silica, talc, mica, titanium dioxide, zinc oxide, aluminum oxide, etc., which has an average particle diameter of 0.1 ~ 50㎛. It means a pigment coated with a metal such as silver, copper, zinc, etc., which is harmless to the human body and has excellent antibacterial effect, which is known from Korean Patent Application No. 94-1659.

According to the present invention, alphahydroxy acid or a salt thereof, ie, glycolic acid, potassium glycolate, sodium glycolate, lactic acid, potassium lactate, for the purpose of preventing keratinization of the skin of the sole by promoting exfoliation or moisturizing and improving the skin keratin condition. 0.1 to 15.0 parts by weight of sodium lactate, hydroxybutyric acid, sodium hydroxybutyrate, potassium hydroxybutyrate, malic acid, sodium malate, potassium malate, or one or more of them, for moisturizing effect and antiseptic and bactericidal action For the purpose of removing foot odor by mixing 0.5-30.0 parts by weight of the gel base containing the pigment for antimicrobial cosmetics to prepare a cosmetic composition. Cosmetic formulations can be prepared in the form of creams, gels, essences, emulsions.

In the present invention, the content of alpha hydroxy acid or salt thereof is 0.1 to 15.0 parts by weight, preferably 0.5 to 10.0 parts by weight. When 0.5 parts by weight or less of alpha hydroxy acid or its salt is used, the effect of hyperkeratosis is insignificant, and when 10.0 parts by weight or more is used, side effects and stability of the formulation deteriorate. On the other hand, the gel base containing the antimicrobial cosmetic pigments is used in the 0.5 ~ 30.0 parts by weight, and also less than 0.5 parts by weight of moisturizing and antimicrobial effect is less than 30.0 parts by weight of stability is difficult to formulate and effective Does not rise too much. Here, the gel base containing the antimicrobial pigment is composed of 1.0 parts by weight of xanthan gum, 40.0 parts by weight of glycerin, 2.5 parts by weight of diethylene glycol ether, 2.5 parts by weight of octylene glycol, 30.0 parts by weight of antibacterial cosmetic pigment and 24.0 parts by weight of purified water. It is not only moisturizing action by osmotic action but also excellent antiseptic sterilization effect, so it is very effective for skin fungus, which is the main cause of athlete's foot and foot odor, and especially in case of antimicrobial cosmetic pigment, it is pointed out as a problem in conventional formulations besides antibacterial effect. There is a characteristic that greatly improves the feeling of use, that is, stickiness or oil. It is preferable that the antimicrobial cosmetic pigment is coated with one or two kinds of silver, copper and zinc on the surface of inorganic pigment for cosmetics such as silica, talc, mica, titanium dioxide, zinc oxide and aluminum oxide.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.

Example 1 Preparation of Gel Base Containing Pigment for Antimicrobial Cosmetics

Next, the aqueous solution consisting of glycerin, diethylene glycol ether, octylene glycol and purified water according to the composition ratio of Table 1 was prepared by dispersing antibacterial cosmetic pigment and xanthan gum in order by mixing the homomixer at 3000 to 6000 rpm at room temperature.

Table 1 Composition of gel base containing antimicrobial pigment

EXAMPLES 2-4

Following the composition ratios shown in Table 2, the water raw materials 1 to 5 and the oily raw materials 6 to 10 were heated to 70 ° C., respectively, and mixed with the paddle mixer 60 rpm and the homo mixer 6000 rpm for 5 minutes while gradually adding the oil phase to the water phase. After cooling, the additive raw material 11 was added at 50 ° C., stirred for 2 minutes at 60 rpm for paddles and 6000 rpm for a homomixer, and cooled to 28˜30 ° C. to prepare a foot care cream.

TABLE 2

[Comparative Examples 1-4]

According to the composition ratios shown in Table 3, the raw materials 1-8 and the oil-based raw materials 9-13 were heated to 70 ° C., respectively, and dispersed well, and then the oil phase was slowly added to the aqueous phase and stirred at a paddle mixer 60 rpm and a homo mixer 6000 rpm for 5 minutes. . After cooling, the additive raw material 14 was added at 50 ° C., stirred for 2 minutes at a paddle mixer 60 rpm and a homo mixer 6000 rpm, and then cooled to 28˜30 ° C. to prepare a cosmetic.

TABLE 3

In order to measure the effect of the cosmetics of the Examples and Comparative Examples was carried out the following test.

[Skin Exfoliation Evaluation]

Samples prepared according to the above Examples and Comparative Examples were applied to the soles of the foot every day by applying 1g / 10cm2 at the heel, using xanthopren of silicon material at 0, 3, 6, 9, and 12 weeks, respectively. Replica was taken and the depth of the stratum corneum was measured by an image analyzer to evaluate the exfoliation effect and the degree of improvement of the skin.

The evaluators tested 15 patients with severely angled soles of 350 ± 10 μm, 5 per sample, and the results are their average.

Table 4. Evaluation result of keratin improvement effect

* Remark: Normal person has wrinkle depth of 100 ± 20㎛.

In addition to the emulsion form, such as the creamy cosmetics as described above, the skin, gel, essence, water-type cosmetics, etc. gave the skin keratin improvement effect.

[Preservative Sterilization Evaluation]

50 g each of the samples of Examples and Comparative Examples were placed in a product container, and bacteria, which were parasitic on the feet of Staphylococcus aureus ATCC and Rhizophyton mentagrophytes, were placed at 37 ° C. on a nutrient agar medium at 24 ° C. After incubation for 48 hours, the cells were suspended in sterile saline and inoculated at 106 cells / g to measure the number of bacteria according to time, and the preservation and bactericidal activity against microorganisms was evaluated.

[Table 5] Evaluation of antiseptic sterilization

[Moisture retention capacity evaluation]

The following tests were conducted to evaluate the effects of anti-cornering and drying prevention by skin moisturizing. In a constant temperature and humidity room at 25 ° C. and a relative humidity of 60%, 5 samples each of the samples prepared according to the above examples and the comparison were applied to the heel area of the foot by applying a predetermined amount (1 g / 10 cm 2) to the skin after 2 hours of application. The skin moisture content measuring device (Skicon 200), which measures the electrical conductivity, was evaluated for about 3 months, and the subject was evaluated by selecting a very dry tester whose skin electrical conductivity was 20 ± 10 μ / Ω.

[Table 6] Measurement results of skin electrical conductivity

[Stability evaluation]

In order to evaluate the stability, the samples prepared in Examples and Comparative Examples were stored at 0 ° C., 50 ° C., -15 ° C. to 45 ° C. in a circulating thermostat and at room temperature until two weeks, one month, three months and one year later. It was. The evaluation results are shown in Table 7 below.

[Table 7] Stability Evaluation Results

Claims (2)

0.1 to 15.0 parts by weight of an alpha hydroxy acid or salt thereof and 0.1 to 15.0 parts by weight of an antimicrobial cosmetic pigment are blended with 0.5 to 30.0 parts by weight of a gel base, and the antimicrobial cosmetic pigment is silica, talc, mica or dioxide. A cosmetic composition for foot care, characterized by coating one or two kinds of silver, copper, and zinc on the surface of inorganic pigments for cosmetics such as titanium, zinc oxide and aluminum oxide. The gel base of claim 1, wherein the gel base containing the antimicrobial cosmetic pigment comprises 1.0 parts by weight of xanthan gum, 40.0 parts by weight of glycerin, 2.5 parts by weight of diethylene glycol ether, 2.5 parts by weight of octylene glycol, 30.0 parts by weight of antibacterial cosmetic pigment, and A cosmetic composition for foot care, comprising a mixture of 24.0 parts by weight of purified water.