JP3174640B2 - Cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic which generates heat when it comes into contact with and mixes with moisture, and has an effect of effectively warming the skin.

[0002]

2. Description of the Related Art When a cosmetic is given heat build-up, various effects collectively referred to as a heating effect, for example, a pleasant sensation at the time of application based on a warm sensation and an activity of the skin by promoting blood circulation. Effects (recovery from fatigue, activation of metabolism, improvement of aesthetics, etc.), effects such as expansion of pores and removal of epidermal stains due to heat, and when cosmetics contain drugs,
It can be expected that fever will have the effect of promoting skin permeability of the drug. As means for imparting exothermicity to bring about such effects, application of chemical reactions such as oxidation-reduction reaction, neutralization reaction, and hydration reaction has been conventionally studied. Since it does not use powerful drugs, its safety is high, and application to the cosmetics field is the most preferable heating means.

Japanese Patent Application Laid-Open No. 51-104443 discloses a method using heat generated by mixing a first agent composed of an aqueous viscous substance and a second agent in which calcium oxide is dispersed in an oil agent at the time of use. A method for causing a hair removing component to act on a hair root portion quickly is disclosed. In this method, heat generated when calcium oxide reacts with water to change to calcium hydroxide is used. Also, Japanese Patent Application Laid-Open No. 57-11450
No. 6, JP-A-62-30704, JP-A-63-30704
JP-A-54308 proposes a pack cosmetic utilizing the heat generated when anhydrous inorganic salts mainly composed of calcined gypsum absorb water of crystallization. Although the hydration reaction of such inorganic salts has a feature that the calorific value per unit weight is relatively large, it prevents the inorganic salts from coming into contact with moisture before use, and also maintains the shape of the cosmetic. Since the non-aqueous medium used for the purpose has insufficient hydrophilicity and thermal conductivity, the thermal effect was not always satisfactory. In addition, since the non-aqueous medium has low hydrophilicity, the hydration reaction of the inorganic salts is suppressed, and only a small amount of the expected heat is generated. Furthermore, since the hydration reaction occurs in the vicinity of the inorganic salt particles dispersed in the cosmetic, a large amount of heat is locally generated, but only the vicinity of the inorganic salt particles is small due to the low thermal conductivity of the surrounding medium. High temperature. When the inorganic salts hydrate, a part of them dissolves in the aqueous phase, but the diffusion of the generated ions is slow due to the low hydrophilicity of the medium. Exposed to For this reason,
As a result, the heating effect was not only insufficient on the whole, but also caused an unpleasant irritation to the skin.

On the other hand, some alcohols (ethanol,
It is known that propylene glycol, glycerin, etc.) generate heat of hydration, and warming cosmetics utilizing their hydration reaction are known (JP-A-54-49334, JP-A-54-49334). 57-75909). However, the heat of hydration of polyols is generally very small compared to the amount of heat generated by the hydration reaction of inorganic salts and other chemical reactions, and the persistence of heat generation is unsatisfactory. Did not.

[0005] Cosmetics utilizing the heat of hydration of activated zeolite are known (JP-A-4-89424, EP 187912, US Pat. No. 3,250,680).
issue). In these cosmetics, polyols and polyethylene glycol are used for the purpose of dispersing the activated zeolite. From the viewpoint of stabilizing the formulation, it has been proposed that the activated zeolite be subjected to an ion exchange treatment in advance. ing. However, in the known cosmetics in which these activated zeolites are dispersed in polyols or polyethylene glycol, the exotherm ends at the moment of mixing the water. It is necessary to disperse at a concentration, which is inconvenient in terms of economy and production operation. In addition, cosmetics containing a high concentration of activated zeolite have a problem in terms of safety, such as burns, because the temperature is temporarily increased when water is mixed.

[0006] Accordingly, there has been a demand for a cosmetic having an excellent effect of warming the skin.

[0007]

Under these circumstances, the present inventors have conducted intensive studies and found that the average degree of polymerization was 200.
If the activated zeolite is dispersed in polyethylene glycol of ~ 1000 and a hydrophilic polymer compound which is hardly soluble in polyethylene glycol is further blended, mild heat is generated from mixing with water, and the heat is generated for 5 to 10 minutes. The present inventors have found that a cosmetic can be obtained and completed the present invention.

That is, according to the present invention, the average degree of polymerization is 200
~ 1000 polyethylene glycol, activated zeolite and contains a hydrophilic polymer compound that is hardly soluble in polyethylene glycol, and the hydrophilic polymer compound is blended in the form of powder or particulate beads, mixed with water It is intended to provide a substantially non-aqueous cosmetic which sometimes generates heat.

The polyethylene glycol used in the present invention must have an average degree of polymerization of 200 to 1,000. Within this range, the amount of heat of hydration generated per unit weight is extremely large, and the interaction with zeolite is weak, so that the decrease in the calorific value is small. It is preferable that these polyethylene glycols be blended in an amount of 20 to 99.9% by weight (hereinafter simply referred to as "%"), particularly 40 to 90% in the total composition.

[0010] As the activated zeolite is not particularly limited, from the standpoint of easy availability and economical efficiency, the following _{equation: Na 2 O · Al 2 O} 3 · 2SiO 2 · zH 2 O (z is optional Zeolite A-
3, zeolite A-4, zeolite A-5, and the like are preferable, and zeolite that has been subjected to a special treatment such as ion exchange and neutralization can also be used. The particle size of these activated zeolites is preferably from 0.1 to 200 μm from the viewpoints of hydration speed, feeling of use, and the like.

[0011] Such a zeolite can be obtained by production, purification, pulverization, calcination and classification by a usual method. In order to obtain a zeolite having a desired activity, for example, as described in EP 187912, about 300
After baking and dehydration at ~ 600 ° C, it may be stored in dry air. In the present invention, these activated zeolites constitute 0.1 to 50%, especially 0.5 to 50%, of the total composition.
It is preferable to mix them.

The hydrophilic high molecular compound which is hardly soluble in polyethylene glycol used in the present invention includes, for example, synthetic high molecular compounds such as polyvinylpyrrolidone, polyvinyl alcohol, polyacrylamide, polyacrylate, carrageenan, xanthan gum, gelatin, dextrin And semi-synthetic polymer compounds such as methylcellulose, carboxymethylcellulose, hydroxyethylcellulose and cationized hydroxyethylcellulose. These polymer compounds can be used alone or in combination of two or more, and also in the form of a copolymer.

[0013] These high molecular compounds in the total composition is 0.0
It is preferable to mix in the form of powder or fine-particle beads so that the content is 0.01 to 20%, particularly 0.01 to 10%. By using these high molecular compounds, unlike the easily soluble high molecular compounds, it is possible to prevent difficulties in production due to thickening, unfavorable feel, and further deterioration of cosmetics.

It is not clear why the blending of these polymer compounds achieves a sustained and mild exotherm, but the result is that the water absorption of the polymer compound and the hydration of the activated zeolite compete with each other when mixing water. It is considered that the hydration rate of the activated zeolite is suppressed. Further, the polymer compound absorbs water in a free state in the cosmetic being manufactured, so that the cosmetic can be kept non-aqueous, and even when the activated zeolite is blended at a high concentration, the zeolite particles can be used. Can be prevented from agglomeration due to moisture, and not only can the production be facilitated, but also no roughness can be felt when the cosmetic is applied to the skin. Further, the polymer compound may substitute the function as a film agent described later in the cosmetic of the present invention.

In the cosmetic of the present invention, in addition to the above essential components,
The following surfactants, inorganic salts other than zeolite, shape retaining agents, lubricants, filming agents, and other components can be blended as long as the effects of the present invention are not impaired.

Among these, a surfactant is used when the cosmetic of the present invention is used as a face wash, a shaving agent, or the like.
It is blended for the purpose of imparting foaming properties and detergency. The surfactant can be arbitrarily selected from known anionic, nonionic, cationic, and amphoteric surfactants, and the combination and the amount and ratio of the surfactant are compatible with the polyethylene glycol used in the present invention. In addition to blending stability, it can be determined by comprehensively judging from rheological properties such as viscosity and fluidity, and detergency, rinsing properties, touch surface and other properties. When these surfactants are used in the cosmetic of the present invention, the ratio of the entire surfactant is 1 to 20%.
It is desirable that If it is less than 1%, the detergency is not sufficient when used as a facial cleanser, and when used as a shaving agent, the razor cannot be sufficiently prevented from being contaminated with sebum or shavings. On the other hand, if the content exceeds 20%, excessive foaming occurs when water is mixed, and the same inconvenience as shaving with a shaving foam or soap foam occurs when the shaving agent is used. However, if it is desired to perform shaving while enjoying the sensation of foam volume and soft touch, the mixing ratio of water (hot water) and the cosmetic of the present invention may be adjusted as desired. By adjusting the degree of kneading on the palm and the application surface, the cosmetic of the present invention can also be foamed as desired.

The inorganic salts are formulated to further enhance the sustained release of heat of hydration achieved by the polyethylene glycol and the activated zeolite. That is, heat is generated by contact with moisture or air, or light energy is converted into heat. Alternatively, a material that suppresses heat dissipation to the outside air (heat storage property) and that causes little skin irritation is desirable. Specifically, anhydrous or low water content lithium chloride, calcium chloride, magnesium chloride, sodium sulfate, potassium sulfate, magnesium sulfate, aluminum sulfate, potassium aluminum sulfate, sodium carbonate,
Suitable examples include potassium carbonate, trisodium phosphate, sodium hexametaphosphate, sodium acetate, potassium acetate and the like.

The salts exemplified above have the property of dissolving in water almost simultaneously with hydration or gradually dissolving in water after absorbing water, and generate a large amount of heat. It is desirable to mix the inorganic salts while dispersing them in the cosmetic of the present invention at a weight ratio of 0.5 to 50%. Further, in consideration of dispersibility, water solubility and feel, the average particle size of the inorganic salts is 0.1 to 0.1.
It is preferable to set it in the range of 200 μm.

The shape-retaining agent is added for the purpose of suppressing heat dissipation and stabilizing the dispersion of inorganic salts. Examples of the shape retaining agent, polyacrylic acid, hydroxypropyl cellulose,
Natural and synthetic polypeptides and polyoxyalkylenes
Semi-synthetic polymer compounds, cellulose beads, chitosan beads, polyethylene beads, polystyrene beads, nylon beads, silicone beads, Teflon beads, titania powder, alumina powder, silica powder, gypsum powder, talc powder, kaolin, mineral powder, wood powder, Animal, vegetable, organic, and inorganic powders such as keratin powder, fiber powder, ceramic powder, and diatomaceous earth, and simple powders such as sulfur powder, iron powder, and carbon powder can be given. 0.1 to 10%, if necessary
It is preferable to mix them.

The lubricant improves the operability of the razor when used as a shaving agent. As the lubricant, various known highly lubricating oils can be used, and polyoxyalkylene is particularly preferable from the viewpoint of having a shape retaining property. The best example is an average degree of polymerization of 2,0
A polyoxyethylene, polyoxypropylene and a copolymer of both, having a mixing ratio of 0.1 to 10%. When the rate is high, it mainly exhibits lubricity and contributes to improving the operability of the razor.

The film agent is used when the cosmetic of the present invention is used as a pack, and examples thereof include polyvinyl alcohol, polyvinylpyrrolidone, carboxymethylcellulose, and vinyl acetate resin emulsion. In the case of a powder pack, there is no need to provide a coating agent, and a mixture obtained by kneading kaolin, talc, zinc oxide or the like is used.

Other components include higher alcohols,
Pyrrolidone carboxylate, urea, amino acid, known wetting agents, preservatives, bactericides, anti-inflammatory agents, astringents, hemostats, analgesics, vitamins and their derivatives, chelating agents, viscosity modifiers, foaming agents, cooling agents , A cooling sensation agent, a metal rust inhibitor, an animal or plant extract, a pigment, an antioxidant, a fragrance, and the like.

The cosmetic of the present invention can be produced by mixing the above components by a conventional method, and is substantially non-aqueous. In use, when quickly mixed with almost the same weight of water, the maximum thermal effect can be easily exhibited in a short time, and the amount of heat of hydration can be easily adjusted by adjusting the amount of water to be mixed. Can control. In order to maintain mild heat generation for a long period of time, the components may be gradually supplied, for example, by spontaneously absorbing moisture in the air, moisture on the skin surface, and water vapor emanating from the skin.

The form of the cosmetic of the present invention is not particularly limited, and it can be formulated into any of lotion, emulsion, cream, gel, paste, pack, plaster, ointment and solid state. Further, since it is excellent in miscibility with a known aerosol propellant, there is no restriction on the discharge from the aerosol container. Furthermore, since the cosmetic of the present invention exerts a large thermal effect in a short time when mixed with water of almost the same weight, the cosmetic and the aqueous liquid of the present invention are separately and simultaneously discharged from an aerosol container. Thus, it can be easily mixed (hydrated) on the spot, and can be applied while generating heat, which is convenient. In addition, the cosmetic of the present invention can be used not only for simply applying and contacting the skin, but also as a cleanser for the skin and hair by utilizing the effect of improving the detergency by heat.

[0025]

EFFECT OF THE INVENTION The cosmetic composition of the present invention is excellent in heat build-up and its persistence, so that skin and hair can be effectively warmed. It excels in the activation of skin, expansion of pores, and removal of skin stains due to heat. Therefore, when the cosmetic of the present invention is used as a shaving agent, for example, it effectively supplies heat to the hair and skin of the portion to be shaved, helps the razor to sharpen, smoothes the razor, and finishes the razor. It is excellent in feeling. Further, when used as a facial cleanser, a pack, or the like, pores are opened by continuous heat, and dirt can be easily removed.

[0026]

Next, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Example 1 The components shown in Table 1 were mixed to produce a warming pack. A certain amount of this is brought into contact with the skin of the arm, at 30 ° C and 75% relative humidity.
The temperature of the skin surface was measured over time under the following conditions. Table 2 shows the results.

[0028]

[Table 1]

[0029]

[Table 2]

As is clear from the results shown in Table 2, the temperature of 46 to 50 ° C. is maintained for 0.5 to 10 minutes after the start of application on the skin surface to which the warming pack of the present invention has been applied,
Gentle heat generation was maintained for a long time compared to the comparative product.

Example 2 The ingredients shown in Table 3 were mixed to produce a warming cream.
At room temperature, the same weight of water was quickly mixed with the mixture, and the temperature of the mixture was measured over time. Table 4 shows the results.

[0032]

[Table 3]

[0033]

[Table 4]

As is clear from the results in Table 4, it was confirmed that the warming cream of the present invention reached a temperature of 50 ° C. or more within 10 seconds after mixing water, and had an extremely large calorific value.

Example 3 An aerosol-type warm feeling shaving agent having the composition shown in Table 5 was produced, and its performance was evaluated by having ten men shave. Table 6 shows the results.

[0036]

[Table 5]

[0037]

[Table 6]

As is evident from the results in Table 6, the shaving agent of the present invention was excellent in all of the degree of heat generation, the feeling when applied to the skin, the shaving taste of the beard, and the finished feeling.

Example 4 A warming facial cleanser having the composition shown in Table 7 was produced and evaluated for heat build-up and removal of dirt from pores. Table 8 shows the results.

[0040]

[Table 7]

[0041]

[Table 8]

As is clear from the results shown in Table 8, the face wash of the present invention has good heat generation and is very effective in removing pore dirt.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI A61K 7/48 A61K 7/48 7/50 7/50

Claims (3)

(57) [Claims] 1. A method comprising: a polyethylene glycol having an average degree of polymerization of 200 to 1000; an activated zeolite; and a hydrophilic polymer compound which is hardly soluble in polyethylene glycol, wherein the hydrophilic polymer compound is in the form of powder or fine-particle beads. A substantially non-aqueous cosmetic that generates heat when mixed with water. 2. The cosmetic according to claim 1, wherein the amount of the polyethylene glycol is 20 to 99.9% by weight of the total composition. 3. The cosmetic according to claim 1, which is a shaving agent, a face wash or a pack.