JPH10245320A - Pack cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a pack cosmetic that contains polyvinyl alcohol and agar, and is easy to apply, can be dried in a short time, allows thick coating with sufficient feeling in use, and has high aging stability by mixing polyethylene glycol at room temperature with the cosmetic preparation. SOLUTION: This pack cosmetic is prepared by compounding polyvinyl alcohol in which 80% or more of polyvinyl acetate is saponified, and whose molecular weight is 5,000-1,000,000, in a quantity of 5-15wt.% based on the whole weight of the cosmetic, polyethylene glycol which is waxy or solid at 20 deg.C and has average molecular weight of 4,000-30,000, in a quantity of 3-15wt.%, and powdered agar or viscous material obtained from red algae in a quantity of 0.5-7wt.%, and adding polyhydric alcohol in a quantity of 5-25wt.% for stabilization of the cosmetic and such powder as sericite and alumina for acceleration of drying of the pack film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pack cosmetic.

[0002]

2. Description of the Related Art Conventionally, wastes and secretions have been removed to clean the skin surface, to promote the penetration of medicinal components into the skin, and to promote blood circulation of the skin by the occlusion effect on the skin surface. Pack cosmetics are used for the purpose of enhancing metabolism. As such a pack cosmetic, a peel-off type pack cosmetic and a sheet-like pack cosmetic aiming at an effect of removing waste products utilizing the tension and adhesive force given to the skin are known.

[0003] However, peel-off type pack cosmetics are generally manufactured in consideration of viscosity and spreadability so that they can be easily applied to the skin surface. For this reason, it is generally difficult to apply them thickly and uniformly. There is a problem that different parts have different drying speeds, and when peeled off, a thin part or an undried part tends to remain on the skin surface. If the viscosity is increased and it is easy to apply thickly, it is easy to give the user the feeling of packing because the thickness of the pack film will be thicker and it will always improve the moisturizing effect, but apply it to the skin It is difficult and the time required for drying becomes too long, resulting in poor value as a product. It is also common practice to incorporate adhesive or adsorptive components in order to remove waste products on the skin surface, but there is a problem that some components may cause unpleasant pain when peeled off. In particular, when a component having high tackiness and adsorptivity is used, this tendency is strongly recognized. On the other hand, a pack cosmetic using a water-soluble natural polymer that does not form a strong film is known, but in this case, there are problems such as slow drying, insufficient film strength, and difficulty in peeling. In addition, it is possible to improve the film strength by using a formulation that uses a film forming agent such as polyvinyl alcohol in combination. I can't solve the pain problem. In addition, when a water-soluble polymer having a gelling property such as agar is used, problems such as inability to mix uniformly due to compatibility problems and solidification during production or before use arise.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object the purpose of uniform application, short drying time and no pain at the time of peeling. It is an object of the present invention to provide a pack cosmetic which can be applied in a thick coat with a high real feeling and is stable over time.

[0005]

Means for Solving the Problems In view of the current situation, the present inventors have conducted intensive studies and as a result, the present inventors have found that the above-mentioned cosmetics containing polyvinyl alcohol and agar can be combined with polyethylene glycol which is solid at room temperature. The inventors have found that the problem can be solved, and have completed the present invention.

That is, the present invention provides 5 to 15% by weight of polyvinyl alcohol, 5 to 15% by weight of waxy or solid polyethylene glycol at 20 ° C., and 0.5 to 7% of agar.
It is a pack cosmetic characterized by containing by weight.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The polyvinyl alcohol used in the present invention is obtained by saponifying polyvinyl acetate, and it is desirable that 80% or more of the polyvinyl acetate is saponified. The average molecular weight of polyvinyl alcohol is preferably about 5,000 to 1,000,000, particularly preferably about 50,000 to 500,000. If the average molecular weight is less than 10,000, the strength of the formed film becomes insufficient, and if it exceeds 1,000,000, the film becomes unpleasantly painful when peeling off the film. The amount to be blended is preferably 5 to 15% by weight of the total amount of the pack cosmetic, and if it is less than 5% by weight, the strength of the formed film becomes insufficient, and if it exceeds 15% by weight, strong pain is caused when the film is peeled off. It is not desirable because you will feel it.

[0008] The polyethylene glycol used in the present invention is preferably waxy or solid at 20 ° C, and has an average molecular weight of about 1,000 or more.
30,000 solids are particularly preferred. This 20 ℃
The waxy or solid polyethylene glycol is contained in an amount of 3 to 15% by weight based on the total amount of the pack cosmetic. When the amount of the polyethylene glycol is less than 3% by weight, the formed film sticks easily to stickiness, and a strong pain is felt at the time of peeling. Even if the content exceeds 15% by weight, no significant improvement in the effect is observed.

The agar used in the present invention is a powder obtained by powdering a viscous substance obtained from red algae seaweed such as tengusa and magsa. Commercially available agar can be used as long as it can be used in cosmetics. Specifically, there can be mentioned, for example, PS-6 agar powder (manufactured by Ina Food Industry). The pack cosmetic of the present invention contains 0.5 to 7% by weight. If it is less than 0.5% by weight, the film does not have a sufficient thickness when applied to the skin, and a satisfactory pack effect cannot be expected. In addition, the reduction of pain at the time of peeling is not good.
If it is contained in excess of 7% by weight, the viscosity becomes high, making it difficult to apply, and the film upon drying becomes hard and unnecessarily thick, which is not preferable. Further, the pack cosmetic itself becomes unstable, and phenomena such as separation and gelation easily occur during storage. It is particularly preferable to add 1 to 5% by weight, since it is easy to apply with an appropriate thickness and has a high pack effect.

[0010] In addition to the above-mentioned components, components commonly used in cosmetics can be incorporated into the pack cosmetic of the present invention as long as the effects of the present invention are not impaired. Such optional components include, for example, ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,4 butylene glycol, glycerin, diglycerin, polyglycerin, polyhydric alcohols such as polyethylene glycol which is liquid at 20 ° C., Sugar alcohols such as sorbitol, maltitol, xylitol, monosaccharides such as glucose, galactose and fructose; polysaccharides such as maltose, lactose and trehalose; sulfated polysaccharides such as heparin, heparinoid, chondroitin sulfate and sulfated trehalose; POE Alkyl ether, POE branched alkyl ether, sorbitan ester, POE sorbitan ester, glycerin fatty acid ester, POE glycerin fatty acid ester, polyglycerin fatty acid ester, hydrogenated castor POE adducts, surfactants such as polyoxyethylene-modified silicone surfactants, ascorbic acid, magnesium ascorbate phosphate, vitamin A, γ-oryzanol, β-glycyrrhetinic acid, hinokitiol, allantoin, chlorophyll, dipotassium glycyrrhizinate, witch Medicinal ingredients such as hazel extract, peach leaf extract, ginkgo leaf extract, chamomile extract, horse chestnut extract, ginseng extract, etc., montmorillonite, bentonite, laponite, hectorite, synthetic hectorite, smecton, synthetic smecton, etc. Water-swellable clay minerals, carrageenan, sodium alginate, xanthan gum,
Water-soluble polymers such as pullulan, methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer, dimethyldiallylammonium chloride / acrylamide copolymer, talc, kaolin, Mica, sericite, titanium dioxide, zinc oxide, aluminum oxide, silicon oxide,
Inorganic powders such as calcium silicate, aluminum silicate, aluminum magnesium silicate, barium sulfate, red iron oxide, yellow iron oxide, navy blue, ultramarine, hydroxyapatite, aluminum powder, crystalline cellulose, microcrystalline cellulose, nylon powder, poly Methylsilsesquioxane powder, acrylic resin powder, polymethacrylic acid powder,
Organic powders such as polyethylene beads, preservatives, bactericides,
And antioxidants.

[0011] Among these optional components, it is preferable to blend a polyhydric alcohol in an amount of about 5 to 25% by weight, since the pack cosmetic can be further stabilized. However, if the amount of the polyhydric alcohol is too large, the drying time of the pack film becomes long. Therefore, considering this point, it is preferable to set the amount to 10 to 20% by weight. In addition, when powders such as sericite, kaolin, silica, titanium dioxide, silicic anhydride, red iron oxide, yellow iron oxide, calcium silicate, aluminum magnesium silicate, and alumina are mixed, the effect of accelerating the drying time of the pack film is improved. By adjusting the amount of these powders, it is possible to adjust the fluctuation of the drying time due to the amount of the polyhydric alcohol, which is preferable.

Although the pack cosmetic of the present invention can be applied thicker than usual, it becomes a pack cosmetic having a high level of makeup realization, but the drying time is sufficiently short despite the thick coating film.

[0013]

Examples and Comparative Examples Hereinafter, the present invention will be described in detail with reference to Examples and Comparative Examples. Pack cosmetics having the compositions shown in Tables 1 and 2 were mixed and produced according to a conventional method.

[0014]

[Table 1]

<Production method> Agar powder was dispersed in a mixed solution of water and 1,3BG, and dissolved by heating from 80 ° C to 100 ° C. The component A was added to the solution and dispersed by stirring. After confirming the dispersion, the mixture was cooled. When the temperature reached about 5 ° C., the B component was added and stirred, and when the mixture was cooled to about 30 ° C., it was taken out to obtain a product.

[0016]

[Table 2]

<Manufacturing method> A manufacturing method was performed in the same manner as in the example.

Paneler 1 for the above Examples and Comparative Examples
The following evaluation test was conducted by 0 persons to determine the effect of the pack cosmetic of the present invention. <Judgment criteria> Pain when peeling X: Painful Δ: Normal ○: Not painful Thickness at the time of application ×: Thin △: Normal ○: Thick Drying time ×: Slow △: Normal ○: Fast moist feeling ×: No △ : Normal ○: Some stability after 2 weeks ×: Gelation △: Increase in viscosity ○: No change

[0019]

[Table 3]

As is evident from the results in Table 3, the pack cosmetic of the present invention has a quick drying time and no pain at the time of peeling, despite the fact that it contains a considerable amount of agar powder. In addition, the thickness of the film at the time of application is sufficient, and it is a pack cosmetic having a high practical feeling.

[0021]

According to the present invention, it is possible to provide a pack cosmetic which has a quick drying time and has no pain at the time of peeling, despite the fact that the thickness of the coating is increased and the feeling of using the pack and the moisturizing effect are high.

Claims (4)

[Claims] 1 to 5% by weight of polyvinyl alcohol,
A pack cosmetic comprising 3 to 15% by weight of polyethylene glycol which is waxy or solid at 20 ° C and 0.5 to 7% by weight of agar. 2. The pack cosmetic according to claim 1, wherein the polyethylene glycol has an average molecular weight of 4,000 to 30,000. 3. The pack cosmetic according to claim 1, further comprising a polyhydric alcohol. 4. The pack cosmetic according to claim 1, further comprising an inorganic powder.