JPH059109A - Pack cosmetic - Google Patents

Abstract

PURPOSE:To obtain a pack cosmetic, having a gentle change in temperature on the skin and capable of providing a comfortable warm feeling to the skin, excellent in persistence of exothermic temperature and good in promoting effects on blood circulation by blending a thermogenic substance coated with a specific coating agent with other ingredients. CONSTITUTION:A coating agent which is a semisolid to solid at ordinary temperature is selected from (A) an oil, e.g. a hydrocarbon, a wax, a hardened oil or a higher fatty acid, (B) a surfactant e.g. glycerol ester of a fatty acid, a polyoxyethylene alkyl ether or polyoxyethylene hardened castor oil, (C) a water- swellable film-forming agent, e.g. a polymer compound prepared by copolymerizing at least 1 to 3 kinds of alkylaminoethyl (meth)acrylates, alkyl (meth)acrylates and (meth)acrylic acid, and converting the resultant copolymer into an amphoteric substance with a halogenated acetic acid and (D) a hydrophobic film-forming agent, e.g. ethyl cellulose having >=1.5 substitution degree or vinyl acetate resin. The resultant coating agent is used to coat a thermogenic substance (e.g. magnesium sulfate, sodium carbonate or calcium chloride).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pack cosmetic composition containing a heat-generating substance coated with a specific coating agent and having excellent heat generation.

[0002]

2. Description of the Related Art Heretofore, it has been practiced to mix a pyrogen such as plaster of gypsum into cosmetics to raise the temperature of the skin surface to promote blood circulation and bring out a further cosmetic effect.

[0003] For example, in Japanese Patent Laid-Open No. 57-114506, pack cosmetics are mixed with calcined gypsum to promote the metabolism of the skin. Further, JP-A-57-99514 discloses that cosmetics such as hair shampoo, hair rinse, hair treatment, hand cleaner and the like are blended with an inorganic substance that generates heat when contacted with water or a solvent in the cosmetic, so that it is comfortable to use. A method of providing warmth and promoting blood circulation is described.

Here, the heat generated on the skin is that the temperature change is gentle and the constant temperature is maintained for a long time.
It is preferable in terms of comfortable warmth and blood circulation promoting effect. However, in these conventional cosmetics, a pyrogen is simply blended, or a curing rate adjusting agent such as sodium chloride, tartrate, gelatin, agar, gum arabic or a gelling polymer such as hydroxypropyl cellulose or methyl cellulose is used. It was only used in combination. For this reason, it is difficult to control the exothermic temperature, and a large amount of exothermic substance must be mixed in order to increase the sustainability of the exothermic temperature, which is a safety problem. Further, in the case of a material having a high reactivity with water, there is a problem that the heat generation state varies depending on the method of use.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention provides a pack cosmetic having a mild temperature change on the skin, giving a comfortable warm feeling to the skin, and having an excellent fever temperature continuity and a good blood circulation promoting effect. The purpose is to provide.

[0006]

Under such circumstances, the present inventors have conducted diligent research and found that a pack cosmetic containing a heat-generating substance coated with a specific coating agent satisfies the above requirements. Completed the invention.

That is, the present invention is selected from an oil agent, a surfactant, a water-swellable film-forming agent and a hydrophobic film-forming agent.
It is intended to provide a pack cosmetic containing a heat-generating substance coated with one or two or more kinds of a semi-solid to solid coating agent at room temperature.

The exothermic substance used in the present invention is not particularly limited, but inorganic anhydrides, hydrates and the like can be mentioned. Specifically, calcium chloride (CaCl ₂ , CaCl ₂ .H
₂ O, CaCl ₂ · 2H ₂ O), magnesium chloride (MgCl ₂ , MgCl ₂ · 2H
₂ O, MgCl ₂・ 4H ₂ O), aluminum chloride (AlCl ₃ , AlCl ₃・ 6
H ₂ O), ferric chloride (FeCl ₃ , FeCl ₃ · 2.5H ₂ O), zinc chloride (ZnCl ₂ ) and other chlorides; magnesium sulfate (MgSO ₄ , MgSO _4
4・ H ₂ O, MgSO ₄・ 4H ₂ O), zinc sulfate (ZnSO ₄・ H ₂ O), ferrous sulfate (FeSO ₄ , FeSO ₄・ H ₂ O), aluminum sulfate (Al ₂ (SO _2
4 ) ₃ ), calcium sulfate (CaSO ₄ , CaSO ₄・ 1 / 2H ₂ O, CaSO ₄・
2H ₂ O) and other sulfates; dry alum, calcium oxide (CaO), sodium carbonate (Na ₂ CO ₃ ), sodium hydrogen phosphate (Na ₂ HPO ₄ ), and the like. Further, the amount of heat generated by these exothermic substances is peculiar to each type, and generally, the less the amount of crystal water of the same inorganic substance, the greater the amount of heat generated. These can be used alone or in combination of two or more, and the temperature is 10 to 80 depending on the reaction with water.
It is preferable that the temperature is adjusted to 20 ° C. according to the purpose and the temperature is controlled to 20 to 50 ° C. on the skin when used as a cosmetic.

Among the coating agents used in the present invention,
As an oil agent, hydrocarbons, waxes, which are usually used in cosmetics,
Hardened oils, higher fatty acids, higher alcohols, ester oils, and the like, specifically, solid paraffin wax, ceresin wax, microcrystalline wax, carnauba wax, candelilla wax, beeswax, mokuro, polyethylene wax, rosin acid pentaerythritol ester,
Examples thereof include stearic acid, lauric acid, myristic acid, behenic acid, cetyl alcohol, stearyl alcohol, lauryl alcohol, myristyl myristate, and glyceryl monostearate.

Examples of the surfactant include glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, sorbitan fatty acid ester and the like, which are generally used in cosmetics, and specifically polyoxyethylene. Polyethylene glycol monostearate, polyoxyethylene cetyl ether, polyoxyethylene hydrogenated castor oil,
Examples thereof include sorbitan sesquistearate.

The oil agent and the surfactant can be used alone or in combination of two or more kinds, but in any case, it is necessary that they are semisolid to solid as a whole. Therefore, a liquid oil agent or surfactant may be used, and as a result of mixing with another oil agent or surfactant, it may be a semi-solid to solid substance.

The water-swellable film-forming agent is a substance which causes a film formed on the surface of a heat-generating substance to swell with the passage of time, and the heat-generating substance reacts with water that has passed through the film. To do. Specifically, for example, at least 1 to 3 kinds of acrylic acid alkylaminoethyl ester, methacrylic acid alkylaminoethyl ester, acrylic acid alkyl ester, methacrylic acid alkyl ester, acrylic acid and methacrylic acid are copolymerized to obtain halogen. Polymeric compounds amphoterized with denatured acetic acid, and commercially available products include Yucaformer AM-75 (manufactured by Mitsubishi Petrochemical Co., Ltd.).

Further, as the hydrophobic film forming agent, the degree of substitution is
Examples thereof include ethyl cellulose, acetyl cellulose, nitrocellulose, vinyl acetate resin, acrylic resin, silicone film-forming agent, high-polymerization degree silicone, ester gum and the like which are usually used in cosmetics.

The amount of the coating agent used varies depending on the heat-generating substance, the type of the coating agent and the coating method, but 0.001 to 1 part by weight of the heat-generating substance is used so that the control of the heat generation time and the reaction with water are smooth. It is preferably 20 parts by weight, particularly 0.01 to 5 parts by weight. If it is less than 0.001 part by weight, the effect is not sufficient, and if it exceeds 20 parts by weight, heat generation may be weakened due to less contact between the heat generating substance and water.

The method for coating the exothermic substance with the coating agent is not particularly limited, and a conventional coating method, for example, (1) a method in which the coating agent is heated and dissolved, and the exothermic substance is added and mixed, (2) the coating agent Is dissolved or dispersed in a solvent, a heating substance is added and mixed, and the solvent is removed, (3) a heating substance is flowed in a gas phase, a coating agent dissolved in the solvent is sprayed, and a method of drying ( 4) A method of mixing and dissolving or dispersing a heat-generating substance and a coating agent in a solvent and spray-drying this is used.

The solvent used here is not particularly limited as long as it is something other than water in which the coating agent dissolves or disperses. For example, ethyl alcohol, isopropyl alcohol, light liquid isoparaffin, volatile silicone and the like are generally used. Used. The amount of the solvent used varies depending on the treatment method, but is preferably 0.1 to 100 parts by weight with respect to 1 part by weight of the coating agent.

The exothermic material coated as described above is
1 to 100% by weight, especially 20 to 80% in the pack cosmetic of the present invention
It is preferable to add the composition in a weight percentage.

In the pack cosmetic of the present invention, in addition to the above-mentioned essential components, components usually used in cosmetics can be added within a range that does not impair the effects of the present invention. Examples of such components include polyhydric alcohols, lower alcohols, water-soluble polymers, ultraviolet absorbers, antioxidants, preservatives, fragrances, dyes, coloring pigments, organic / inorganic powders, and cosmetic ingredients.

[0019]

The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

Example 1 Pack cosmetics were prepared based on the formulations shown in Table 1, Table 2 and Table 3 and reacted with water to measure the exothermic temperature over time. (Preparation Method) A. Add No. 5-17 heated and dissolved to No. 18 and dissolve or disperse. B. Add Nos. 1 to 4 to A and mix uniformly. C. Heat B to volatilize No.18. D. Add No. 19 to C and mix and disperse. (Test method) Add 10 parts of a sample and 10 parts of water to a beaker and mix and stir for 30 seconds. The temperature was measured 30 seconds, 5 minutes and 10 minutes after adding water. The results are shown in Table 1, Table 2 and Table 3.

[0021]

[Table 1]

[0022]

[Table 2]

[0023]

[Table 3]

As is clear from Table 1, Table 2 and Table 3,
The product of the present invention controls the reaction between the heat generating substance and water,
The temperature rise was slow, and the exothermic temperature persistence was good. On the other hand, Comparative Examples 1, 2 and 3 in which a heat-generating substance was blended alone without using a coating agent, and Comparative Example 4 in which the same components as the coating agent were used but were simply coated without coating the heat-generating substance.
In, at the same time as the addition of water, showing a rapid temperature rise,
After 30 seconds, the exothermic temperature only dropped.

Example 22 (Component) (wt%) 1. Anhydrous magnesium sulfate 30 2. Silicon-based film forming agent (trimethylsiloxysilicic acid) 1 3. Ethyl alcohol 20 4. Crystalline cellulose 49

Example 23 (Component) (wt%) 1. Anhydrous magnesium sulfate 30 2. Dimethylpolysiloxane (1 million cs) 3 3. Decamethylcyclopentasiloxane 20 4. Crystalline cellulose 47

Example 24 (Component) (wt%) 1. Anhydrous magnesium sulfate 30 2. Ester gum 1 3. Light liquid isoparaffin 20 4. Crystalline cellulose 49 (Production method) Prepared according to Example 1. Examples 22-24
The reaction between the exothermic substance and water was controlled, the temperature rise was slow, and the heat generation was good.

[0028]

Since the pack cosmetic of the present invention is coated with the heat-generating substance contained therein, the reaction between the heat-generating substance and water is controlled, and since the temperature change is gentle, the skin feels warm and comfortable. Moreover, since the exothermic temperature is excellent in persistence, the blood circulation promoting effect is also good.

Claims (1)

Claims: 1. A semi-solid to solid coating at room temperature comprising one or more selected from an oil agent, a surfactant, a water-swellable film-forming agent and a hydrophobic film-forming agent. A pack cosmetic containing a coated pyrogen.