JPH0940518A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the film-forming property, moisture retention, stability and safety of a water-based cosmetic usable as a foundation cosmetic. SOLUTION: The objective cosmetic is an aqueous solution containing sorbitol which is a reduced glucose known as a moisture retention agent, pullulan which is a polysaccharide obtained from starch and known as a film-forming component and sodium chloride as an osmotic pressure imparting component. The amounts of sorbitol, pullulan and sodium chloride in the total cosmetic are 10-40 wt.%, 1-15wt.% and 0.1-2wt.%, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based cosmetic which is a basic cosmetic having excellent film-forming property, moisturizing property and stability.

[0002]

A lotion, which is widely used as a water-based cosmetic among basic cosmetics used for smoothing physiological functions of the skin and maintaining a healthy state, is a moisturizer. , Mucilage, alcohols, water as the main raw materials, glycerin, polyethylene glycol,
It is well known that propylene glycol, sorbitol, etc. are used as moisturizers, and animal and plant systems, cellulose derivatives, synthetic polymers, inorganic substances, etc. are mucus ("Chemical Handbook Applied Edition", 3rd edition, March 15, 1980, Maruzen). Issue, pp. 1184-1186).

Moisturizers are used to prevent the evaporation of water and to prevent the dry deterioration of the cosmetics themselves and to prevent keratinization of the skin. Mucus spreads thinly and evenly on the skin surface and prevents peeling. It is for fixing.

Therefore, the basis is to form and maintain a stable film on the surface of the skin for a long time, to clean the skin, to provide appropriate water and to improve blood circulation, that is, to maintain the skin in a healthy state. The selection of mucus is very important for achieving the cosmetic goals.

As mucus used in cosmetics, various gums, pectin, starch, sodium alginate,
Animal and plant systems such as gelatin and casein, cellulose derivatives such as methyl cellulose and ethyl cellulose, synthetic polymers such as polyvinyl alcohol, polyvinyl ether and polyethylene oxide, and inorganic substances such as bentonite are known. Among these, synthetic polymers are of stable quality. It is widely used because of its excellent points.

Considering the influence of such mucus on the skin when it adheres for a long time, natural mucus is preferable, but there is no one which is sufficiently satisfactory in terms of stability, and a preservative,
It may be necessary to add antioxidants and the like.

The present invention is excellent in film forming property, moisturizing property and stability by using only a substance obtained from a natural product without using a synthetic product, and does not require additives for maintaining and improving the function. The object of the invention is to provide a water-based cosmetic material that can be safely used.

[0008]

That is, the present invention provides an aqueous solution of sorbitol, pullulan and sodium chloride, particularly 10 to 40% sorbitol and 1 to pullulan in the total weight.
The above problems were solved by mixing 15% and sodium chloride in the range of 0.1 to 2% (each weight ratio).

Although sorbitol itself is already known as a moisturizer, this glucose reducing substance has more water molecules than other sugars and has a small tendency to crystallize, and therefore has excellent moisturizing property. It has the characteristics of non-browning, non-reactivity with amino acids and proteins, and difficult growth of microorganisms and therefore excellent stability. In addition, it has protein stabilizing action, lipid oxidation preventing action, and permeability. According to the present invention, it is judged that these properties are effective for solving the problem, and the substance is used.

[0010] Next, as a result of examination of substances that replace known mucus as a film-forming component, pullulan, which is a polysaccharide obtained by culturing black yeast using starch as a raw material, is effective in solving the problems of the present invention. I found that there is.

That is, pullulan is obtained by culturing black yeast using starch as a raw material, removing the cells from the yeast, purifying and concentrating it, and neutralizing maltotriose with α-1.6 binding, It is an odorless, amorphous, non-binding and edible polysaccharide with a molecular weight of about 200,000. In addition, this substance is excellent in stability and water retention, is easily water-soluble, and has a relatively low viscosity such that a 5% aqueous solution is about 100 cp at room temperature, but is a highly tacky aqueous solution, and This aqueous solution forms a transparent film having excellent film-forming properties, gas barrier properties, oil resistance, adhesive properties, high tensile strength, high elasticity, and gloss.

Further, in the present invention, in order to improve the function of the basic cosmetics to smooth the physiological function of the skin and to provide appropriate water for that purpose and to improve blood circulation, sodium chloride is added for proper penetration. It has a bactericidal and stimulating effect as well as a pressure.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A moisturizer as the main component, that is, sorbitol, has a poor anti-drying effect in a small amount, and conversely, if it is in an unnecessarily large amount, the compounding amount of other components is compressed, resulting in an aqueous property and film formation. Since the property is impaired, it is decided to use it in a range of 10 to 40% by weight relative to the total weight.

In addition, pullulan, which is a film-forming component, cannot form a thin and evenly spread film with a small amount, and conversely, with an excessively large amount, the amount of other components compounded will be compressed, and the moisturizing property of sorbitol will function effectively. For this reason, it causes a disadvantage that it must be applied thickly, so that it is decided to use it in a range of 1 to 15% by weight relative to the total weight.

Further, sodium chloride creates an aqueous atmosphere on the skin surface with appropriate permeability for skin cells and interstitial fluid, and together with the expectation of a bactericidal effect, the total weight is It was decided to use it in the range of 0.1 to 2% by weight.

As water for mixing these into an aqueous solution, purified water used in cosmetics is generally used, but physiological saline is used as it is, or if desired, diluted with purified water. Alternatively, sodium chloride may be added thereto to adjust the concentration to the required level, and sorbitol and pullulan may be mixed and dissolved. Also, although they dissolve at room temperature,
When adjusted by mixing and dissolving in water heated to about 70 ° C. or lower, the dissolving time is shortened.

The cosmetic of the present invention is basically water-based, and each of the above components has excellent stability.
It does not require the use of auxiliary substances for maintaining or improving the quality and function, but it does not prevent the addition of animal or plant-based oily raw materials, flavors and the like as desired.

Further, the cosmetic of the present invention is provided to the consumer by filling it in the same container as a normal cosmetic, and the consumer moves it from the container to the palm and applies it to a desired place to spread it thinly to form a film. It is used without any difference from ordinary cosmetics. However, the film that pullulan forms, that is,
Although the coating has excellent adhesiveness and is well settled on the skin surface, it also dissolves easily in cold water, so it is necessary to be careful not to touch it.For that reason, cosmetics remaining on the palm should be removed. There is an advantage that it can be easily removed by washing with water.

Pullulan forms a stable film that protects the skin surface from the external environment by its film-forming property, gas barrier property, oil resistance and adhesiveness, and its water-retaining property and sorbitol's moisture-retaining property and permeability. And the osmotic pressure of sodium chloride work together to provide appropriate water to the skin and improve blood circulation, and also to keep sweat and fat excreted from the skin on the skin surface to prevent dry keratinization. However, since each component is a harmless substance obtained from a natural product and free from deterioration, it can be safely used without causing skin disorders.

[0020]

EXAMPLES Next, the formulation examples of the present invention and the results of the evaluation tests thereof will be shown. The numerical value of each component in the formulation example of Table 1 is the weight ratio in the total weight.

[0021]

[Table 1]

The evaluation test is conducted in the twenties, thirties and four.
A test in which 1 g each of Prescription Example 1 and Prescription Example 2 is applied to each of the inner arms of both upper arms in exactly the same manner as the use of a normal aqueous basic cosmetic for 10 women in their 0s and left for 24 hours for washing and removal. Was repeated every day for 10 days. Among the evaluation items shown in Table 2, the safety was evaluated based on whether or not skin abnormality was observed at the completion of the final test, and the other items were comprehensively evaluated through each test. Among the 10 persons, the items which were evaluated as good by 8 or more were indicated by O, the items by 7 or less by 5 were indicated by Δ, and the items by 4 or less were indicated by X.

[0023]

[Table 2]

According to the evaluation results of Table 2, the cosmetic of the present invention has good elongation on the surface of the skin, is well fixed and gives a moist feel without stickiness for a long time, and further gives the above-mentioned to the skin. It turns out that it can be used safely without.

Claims (1)

[Claims] 1. Sorbitol, pullulan, and sodium chloride are dissolved in water, and sorbitol is 10 to 40%, pullulan is 1 to 15%, and sodium chloride is 0.1 to 2% (each of the total weight). A weight ratio).