JP2001122723A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect skin and enable to activate a horny layer. SOLUTION: This cosmetic is obtained by dispersing a platinum colloid in a base material. The base material a water soluble ingredient for adhering the platinum colloid to a human body and the platinum colloid is produced by sequentially carrying out a reduction processing and a filtration processing. Polysorbate 80 is used as a surfactant, a chloroplatinic acid solution as a platinum ion solution and a sodium hydrogen carbonate as a pH compensator. Oxidation-reduction potential after finishing the reduction expresses <=-400 mV. Horny layers are activated by applying the cosmetic on the human skin by electric double layer effect which the negatively charged platinum colloid has.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a cosmetic product utilizing the high surface active energy of a metal cluster, particularly the active energy of a platinum colloid.

[0002]

2. Description of the Related Art Cosmetics are distinguished from pharmaceuticals by the Pharmaceutical Affairs Law, are used by rubbing, spraying and similar methods, and are said to have a relaxing effect on the human body.

Some cosmetics are customarily regarded as cosmetics, but are not regarded as cosmetics by law. For example, hair dyes, part of hair tonics (they have the effect of preventing hair loss and hair growth), hair removers, agents for permanent waves, baby powder (they have the effect of preventing rash and soreness), acne, rough skin, and rash In addition, in the present invention, cosmetics include those treated as quasi-medical products.

[0004] In general, the skin usually refers to the epidermis, among which the outermost stratum corneum. The stratum corneum of healthy and beautiful skin is composed of 14 layers of flat stratum corneum, arranged in an orderly manner, preventing moisture from the body and protecting against invasion of irritants from the outside. In healthy skin, the stratum corneum retains 10 to 30% of water, when the water in the stratum corneum is less than 10%, the keratinocytes are turned up, and when the skin is dull or more severe, powder is removed. May cause skin irritation.

It has already been clarified that the water content of the stratum corneum is the basis of skin suppleness and freshness. This mechanism of holding a certain amount of moisture is originally one of the functions originally possessed by the skin, and is called "moisturizing function". Not only functions within the stratum corneum but also between the stratum corneum and the basal layer It is known that a certain spinous layer plays an important role.

[0006] Creams are typical cosmetics used on the skin. The cream makes the skin soft and smooth, and at the same time, creates a thin oily film on the skin surface, reduces the effect of the outside air or sunlight on the skin, and also flattens the skin surface to improve make-up It is said to work.

[0007]

On the other hand, the human body is a conductor, and when it is viewed from the skin, the stratum corneum is negatively charged and the stratum corneum is positively charged. A buffer band is formed between the layers, and the buffer band forms an "electric double layer". The function of the electric double layer prevents the passage of ions into the inside, and also prevents water from entering. Working as a barrier.

For this reason, electrolytes are very difficult to be absorbed in normal skin, but if the buffer band is damaged by trauma or inflammation, electrolyte absorption becomes easy, and even in normal skin, the stratum corneum When the electric charge of the buffer decreases, the buffer band loses its electrical properties in view of the behavior of the ions, and becomes more permeable to electrolytes.As a result, not only can water in the stratum corneum be retained, but also irritants can penetrate and the entire skin However, it was not intended for cosmetics to protect the skin under such circumstances.

An object of the present invention is to pay attention to the fact that the electric double layer function in the skin is the same as the physical properties of the platinum colloid, and in particular, to exert the electric double layer function of the highly concentrated and highly active platinum colloid on the skin. Accordingly, it is an object of the present invention to provide a platinum colloid-containing cosmetic that protects the skin and activates the stratum corneum.

[0010]

Means for Solving the Problems To achieve the above object, a cosmetic according to the present invention is a cosmetic in which a platinum colloid is dispersed in a base, wherein the base is a water-soluble component, It is added to make the colloid adhere to the human body.

[0011] The platinum colloid is produced by a precipitation method.

Platinum colloid is produced by sequentially performing a reduction treatment and a filtration treatment. Ethanol is used as a reducing agent, polysorbate 80 is used as a surfactant, chloroplatinic acid solution is used as a platinum ion solution, and carbonic acid is used as a pH compensating agent. Using sodium hydrogen, the oxidation-reduction potential after the completion of the reduction reaction shows a negative value of 400 mV or more.

Further, the present invention is a cosmetic in which a platinum colloid is dispersed in a base material. The platinum colloid activates the stratum corneum by the electric double layer effect of the negatively charged platinum colloid.

The platinum colloid contributes to the maintenance of homeostasis inherent in the skin due to the electric double layer structure created by the surface active energy produced by the nano-sized (nm) ultrafine particles of the platinum colloid.

[0015] In addition, the platinum colloid acts on the cuticle of the hair by the electric double layer effect of the negatively charged platinum colloid in the same manner as the action on the skin, thereby protecting and moisturizing the cuticle. is there.

The inventors have, for many years, developed gold, silver, platinum,
He has been researching ultrafine particle technology for precious metals and precious metals such as palladium. As a result, it was found that the use of a high-concentration and high-activity platinum colloid has an excellent effect of protecting and activating skin and hair.

In FIG. 1, the skin usually refers to the epidermis 1 and, among them, the outermost stratum corneum 2. The cells created by the cell division of the innermost basal cells of the epidermis 1 are pushed upward while changing their shapes little by little to end their lives, and become horny cells to form the horny layer 2.

Generally, it takes 14 from the basal layer to the stratum corneum.
It is said that the skin is reborn in a cycle of about 28 days, about 14 days before the keratinocytes reach the skin surface and peel off. In the stratum corneum of healthy and beautiful skin,
About 14 layers of flat keratinocytes are stacked and arranged in an orderly manner, preventing water evaporation from the body and protecting against invasion of stimuli from the outside.

As described above, the stratum corneum 2 contains 10 to 30
% Moisture is kept. As described above, when the water content of the stratum corneum 2 becomes 10% or less, the keratinous cells are turned up, and the skin becomes bulky and dull, and when it becomes more severe, the skin may be roughened like dusting.

The moisture of the stratum corneum 2 is the skin's suppleness,
It is the basis of freshness. This mechanism of retaining a certain amount of water is originally called “moisturizing function” as one of the functions originally possessed by the skin, and the spiny layer 3 between the stratum corneum and the basal layer plays an important role. The buffer zone 4 between the stratum corneum 2 (negatively charged) and the stratum corneum 3 (positively charged) has an “electric double layer” having H ⁺ on the stratum corneum side and OH ⁻ on the stratum corneum side.
Which, as described above, blocks the passage of ions and also acts as a barrier against water ingress. The principle of the electric double layer in the skin and its function have already been confirmed (“Cosmetic Science” by Tetsusaku Ikeda, Nanzando, 1
968)

By the way, in normal skin, electrolytes are very difficult to be absorbed, and if this buffer band is lost due to trauma or inflammation, electrolyte absorption becomes easy. In addition, when the charge of the stratum corneum is reduced even in normal skin, the ionic buffer zone loses its electrical properties and easily penetrates the electrolyte, so that not only can water in the stratum corneum be retained but also irritants can enter. ,
The result is that the entire skin is affected.

The present inventors have paid attention to the fact that the function of the skin is the same as the physical properties of the metal colloid. By applying the electric double layer effect to the skin, the skin is kept (moisturizing action). It was thought that it was possible to activate the stratum corneum (improve electric charge) by an electrostatic electric field.

FIG. 2 is a diagram used for explaining the principle of electrophoretic light scattering. When a metal colloid is dispersed in a solution of cosmetics or the like, it is electrically negatively or positively charged due to dissociation of its surface polar group or adsorption of ions.

The platinum colloid is negatively charged.
Negative ions act on the human body in the form of reductive synthesis from the viewpoint of substance metabolism, and, if appropriate, have the action of stimulating the parasympathetic nerves of the human body, causing abnormal in vivo functions to occur in a physiological state. Let me restore. It is also said to correct blood acid-alkali balance, reduce blood pressure, restore anemia, enhance reticuloendothelial system function, eliminate fatigue, bring about effects such as healing of necrosis, inflammation, and wound healing. (See “Water and Life”, Doctor of Medicine, Keiichi Morishita, Midori Shobo, 1992).

In FIG. 2, in the vicinity of the particle 5, there are diffusely distributed ions having the opposite sign and ions having a small amount which are present in excess to neutralize the interface charge. And these ions form an electric double layer.

In FIG. 2, it is considered that the negative ions outside the ions 5 and in the diffusion layer 6 retain the skin. Further, the zeta potential generated on the slip surface 8 near the boundary between the fixed layer 7 and the diffusion layer 6 is on the order of -22 mV. It is easily assumed that the electrostatic electric field caused by this also has an effect on the skin.
The electric double layer made of platinum colloid is characterized by its persistence, and ultrafine platinum particles are not reduced by a general chemical reaction or the like.

In other words, by continuously realizing the electric double layer function of the skin that has already been confirmed, the substance of platinum does not act directly, but the nano-size (nm) of platinum colloid. It is thought that the electric double layer structure created by the surface active energy provided by the ultrafine particles of (1) contributes to the maintenance of homeostasis inherent in the skin.

In the present invention, the platinum colloid is prepared by dispersing the colloid in a base. The base is basically added to adhere the platinum colloid to a human body. Or, it is not expected to work as hair care. The base is a water-soluble component which can be dissolved in water among the components of cosmetics, and for example, concentrated glycerin, butylene glycol, polyethylene glycol, carboxyvinyl polymer and the like are used. Further, when an oily component is used as the base, the oil wraps around the platinum colloid, and the effect of the negative electrode due to the electric double layer structure produced by the platinum colloid does not seem to be sufficiently exhibited. Cosmetics can be used in such forms as creams, lotions, emulsions, balms, and hair tonics.

However, oiliness, neutrality,
It may be necessary to use properly such as weak oiliness. As an effect of activating skin by the electric double layer of platinum colloid contained in cosmetics, for example, an effect on ultraviolet rays can be considered.
Ultraviolet rays affect the skin, causing skin irritation due to sunburn and darkening of the skin after sunburn.

At present, cosmetics such as sunscreens have B ultraviolet rays (UVB: also expressed as B wave, which act on the surface of the skin and cause red inflammation and blistering when bathed for a long time)
SPF (sun protection f
actor: The higher the value of SPF, the more effective).

In order to increase the SPF value, a method of absorbing chemically harmful ultraviolet energy with an ultraviolet absorber or physically blocking ultraviolet light by an absorption scattering effect of a metal fine particle powder or the like is adopted. In the case of cosmetics using fine metal particles, titanium dioxide is made into ultrafine particles. However, there is a clear difference in the particle size between the fine particles and the platinum colloid. It can be expected to have a great effect on absorption or blocking, but it has not been confirmed at present. In addition, as a favorable effect on skin, the effect of far-infrared rays due to the surface activity of ultrafine platinum colloid particles can be expected.

Furthermore, an effect on hair can be expected. Hair contains about 11-16% moisture. It is also sensitive to the external humidity. If the humidity is high, it absorbs the moisture in the air and swells and expands. If the humidity is low, it dries and shrinks. The hair (hair shaft) is divided into three layers, from the outside "cuticle (hair epidermis)""cortex (fur cortex)"
It is called "medula".

Among them, cortex is about 8
It accounts for 0% and determines its physical properties. Its main component is a protein that is softer than cuticles.
The structure of cortex is divided into cortical cells and cell mesenchyme, and each has a role. Among them, what is present between the cortical cells is the cell mesenchyme, which controls the water in the hair and determines the softness and suppleness of the hair.

The cuticle is generally negatively (-) charged, and it is considered that the inside of the hair also forms an electric double layer. Similar to the action of the platinum colloid on the skin, the electric double layer effect of the negatively charged platinum colloid is obtained for the cuticle, and the cuticle is protected and moisturized.

Further, it is considered that hair follicles represented by hair papilla are also effective, and improvement of alopecia can be expected. As described above, platinum colloid can be expected as a component of new hair care cosmetics.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a cosmetic according to the present invention will be described below. The cosmetic according to the present invention has been prepared by dispersing a platinum colloid in a base.

The colloidal platinum is produced by sequentially performing a reduction treatment and a filtration treatment. Ethanol is used as a reducing agent, polysorbate 80 is used as a surfactant, chloroplatinic acid solution is used as a platinum ion solution, and sodium hydrogen carbonate is used as a pH compensating agent. And the oxidation-reduction potential after the completion of the reduction reaction is a negative value of 400 mV or more.

The base is added to adhere the platinum colloid to the human body. When processing into a creamy cosmetic, water and water are used as in the case of facial cleansing cosmetics, and water-soluble components such as butylene glycol, polyethylene glycol, and carboxyvinyl polymer can be used as described above.

According to experiments conducted by the inventors on the reduction treatment and the filtration treatment for producing the platinum colloid, a surfactant (protective colloid) must be contained to stably produce a high-concentration platinum colloid. It is important to adjust the reducing agent and pH compensating agent to water in a well-balanced manner to reduce the platinum ions, and it is important to adjust the amount of ethanol or sodium bicarbonate added as a reducing agent. It turned out to be essential for maintaining stability.

Prior to the reduction treatment, the treatment liquid is adjusted.
Water as a treatment liquid to be mixed with a platinum ion solution (in the case of platinum, chloroplatinic acid solution) (purified water from which impurities have been removed by filtration), and a surfactant to be added to the water (a nonionic surfactant) And reducing agent (alcohols) and pH
Prepare a compensating agent (alkali metals). It is important to adjust the amount of each component of the processing solution mixed with the platinum ion solution.

The volume ratio of the platinum ion solution was 1 /
It is assumed that an amount of 5 platinum ions is included. When 400 to 500 times the volume of water is used as the base of the treatment liquid with respect to the platinum ion solution 1 in terms of volume ratio, the amount of the surfactant (nonionic surfactant) added is 0.2% of the platinum ion solution. ２2 times, the amount of the reducing agent added is 40 to 60 times the platinum ion solution, and the amount of the pH compensating agent is 5% concentration, which should be set within the range of 10 to 30 times the platinum ion solution. is there.

The larger the amount of surfactant added in the treatment liquid, the more the surfactant aggregates. Conversely, if the amount of surfactant added is small, the platinum colloid formed in the treatment liquid will It will precipitate inside.

The reason for setting the amount of the surfactant to be 0.2 to 2 times the amount of the platinum ion solution is determined in relation to the amount of other additives, ie, the reducing agent and the pH compensating agent. Should be. This is the same for the reducing agent and the pH compensating agent.

Needless to say, the reducing agent promotes the reduction reaction of the platinum ion solution.
The formed platinum colloid will precipitate at more or less than the range of 40 to 60 times the platinum ion solution.

The pH compensating agent adjusts the pH of the treatment solution to be acidic to neutral or weakly alkaline by adding a platinum ion solution. Therefore, the pH compensating agent is added to the treatment solution simultaneously with the platinum ion solution.
If the amount of the pH compensating agent is more or less than the range of 10 to 30 times the platinum ion solution, the formed platinum colloid will precipitate.

Incidentally, when the amount of water is larger than the amount of the platinum ion solution, the concentrations of the platinum ion solution, the reducing agent and the pH compensating agent in the water are relatively reduced, and the concentration of the platinum ion solution in the processing solution is reduced. There is a problem in the stability of the colloidal state of platinum colloid.

(A) Reduction treatment The reduction treatment is a treatment for reducing platinum ions in water (purified water that has been filtered).
First, the temperature is raised while stirring the water, and after reaching a certain temperature, a surfactant and a reducing agent are added to the water, and then a platinum ion solution and a pH compensator are added to the treatment liquid. ,
A platinum ion contained in the platinum ion solution is reduced in water by the action of a reducing agent to form a platinum colloid in the treatment liquid.

By controlling the amount of the surfactant added to the purified water to 0.2 to 2 times the amount of the platinum ion solution when adding the surfactant and the reducing agent to the treatment solution, Colloid stability is ensured.

Further, the reduction reaction of the platinum ion solution proceeds by adding the reducing agent. The timing of the addition of the platinum ion solution is important. The temperature of the processing solution is further increased, and after reaching a certain temperature, a platinum ion solution is added.

The pH compensating agent is added simultaneously with the addition of the platinum ion solution in order to adjust the pH of the processing solution. The stirring is continued while keeping the temperature of the processing solution to which the platinum ion solution is added at a constant temperature, and when the platinum ions are reduced (in the case of platinum, the color of the solution changes to black), the heating and stirring of the processing solution is started. Upon completion, a platinum colloid is obtained in the processing solution.

As described above, in the embodiment, the treatment liquid contains
After forming a reducing atmosphere in the processing solution by adding a reducing agent and a surfactant, a platinum ion solution was added, or conversely, the temperature of the processing solution was increased and a surfactant was added, and the temperature was maintained at a constant temperature. After that, a platinum ion solution and a pH compensator may be added to the treatment liquid, and then a reducing agent may be added to form a reducing atmosphere in the treatment liquid. In this case, the treatment liquid enters a standby state in a reducing atmosphere, and the reduction reaction starts and proceeds as soon as the platinum ion solution is added.

(B) Filtration Treatment The filtration treatment is a treatment for preventing dust and the like from being mixed into the platinum colloid. As a filtration treatment, the treatment liquid containing the platinum colloid is filtered and allowed to stand for a while to confirm the completion of the reduction reaction, and the color in the liquid (black in the case of platinum) is confirmed. Subsequently, ultrafiltration is performed while adding purified water to the treatment liquid in order to remove low-molecular ions other than the platinum colloid and to remove salts. Then, after performing filtration again, a processing liquid is filled into a container. In the above series of treatments, the colloidal state of the platinum colloid formed in the liquid is kept stable by reducing the platinum ions while applying a surfactant (a nonionic surfactant) to the platinum ion solution. .

After a sterilization treatment is performed as a final treatment, inspection is carried out, and if necessary, dehydration is performed. The obtained platinum colloid is mixed with a water-soluble base to obtain a product. When processing into creamy cosmetics, water and glycerin are used as a base, as in the case of facial cleansing cosmetics, as described above.
Water-soluble components such as butylene glycol, polyethylene glycol and carboxyvinyl polymer can be used.

When processing into a lotion-like cosmetic, a wetting agent such as alcohol and glycerin and purified water are used. In order to further increase the adhesive force, butylene glycol added to cream emulsions can be used. Of course,
Can be processed into hair cosmetics. For example, a hair liquid can be obtained by adding platinum colloid using a component that dissolves in alcohol / water base as a base, and a hair cream by adding platinum colloid to a base obtained by adding a higher alcohol or polyethylene glycol to hair cream oil. Can be processed.

(Examples) Examples of the present invention will be described below. Platinum colloid was produced according to the following procedure. (1) Preparation of treated water <Water A> The purified water was filtered through a 1 μm mesh filter paper,
4,300 ml were prepared. <Reducing agent B> 500 ml of ethanol (CH ₃ CH ₂ OH) was measured. <Surfactant C> Polysorbate 80 (Tween8
0) was selected and weighed 5 ml. <Platinum ion solution D> chloroplatinic acid solution (H ₂ PtC1 ₆₎
Was prepared, and 10 ml (containing 2 g of Pt) of this chloroplatinic acid solution was weighed. <PH compensator E> Sodium bicarbonate (NaHCo ₃ )
10 g of this was prepared, and 10 g of this sodium hydrogen carbonate (NaHCo ₃ ) was dissolved in 200 ml of filtered purified water.

(A) Reduction Treatment The above-mentioned water A was placed in a container as a treatment liquid, and the temperature was increased while stirring the water. When the temperature of water reaches 60 ° C., water A
Was added with the reducing agent B and the surfactant C. After the addition of the reducing agent B and the surfactant C, the temperature is increased while stirring the water A, and when the temperature of the treatment liquid reaches 70 ° C., the platinum ion solution D and the pH compensating agent E are simultaneously added. did.

While maintaining the temperature at 70 ° C., the stirring of the treatment liquid is continued, and when the platinum ions are reduced, the stirring is continued.
The heating was stopped to obtain a platinum colloid solution.

(B) Filtration Treatment After the completion of stirring, the platinum colloid solution was filtered through a 1 μm mesh filter paper and allowed to stand for 12 hours. After standing, the molecular weight cut off 1
Filtration was performed using a 000 ultrafiltration membrane while adding 8,000 ml of purified water, and the mixture was filtered again with a 1-μm filter paper and dispensed into product containers. As a commercialization process, raise the temperature in the product container to 85 ° C, sterilize for 10 minutes,
0.5 g of platinum colloid was obtained in 00 cc of water.

It was found that the platinum colloid formed in the treatment solution by the above method had high activity and was stable. It is considered that the platinum colloid obtained by the above method has high activity and excellent stability for the following reasons. That is, as the colloidal platinum increases its interfacial area due to its formation, the increase in the interfacial energy between the particles and water must be externally supplemented. At this time, if the surfactant is present, it is adsorbed on the interface and the interface energy is reduced, so that the generation of the dispersion system becomes easier.

Further, since the surfactant adsorbing layer surrounds the fine particles by directing the hydrophilic group toward water, the particles can be prevented from being buffered by the repulsive force of the electric charge between the particles and the hydration layer.

Since the nonionic surfactant has no charge, it does not affect the charge of the formed platinum colloid, and can utilize the charge of the platinum colloid.
However, surfactants are themselves made up of hydrophobic and hydrophilic groups, and nonionic surfactants are substances that do not ionize when dissolved in water.Hydroxy groups and ether groups have hydrophilic properties. Since it is weak, it is designed to be very high polymer to increase hydrophilicity.

This means that when the concentration of the nonionic surfactant in the platinum colloid exceeds a certain range, these polymers rather increase the interface energy of the colloidal algae,
It leads to hindering stability.

The colloid particles constantly collide due to Brownian motion and the like, but in a stable colloid solution,
There are causes that prevent the bonds between particles when the particles collide with each other.

The reason for this is that the colloid particles are charged and the colloid particles are hydrated by binding to the dispersion medium. As described above, the platinum colloid is hydrated surrounded by the surfactant, but the fact that the colloid particles are charged can be understood from the following facts.

When a substance becomes ultra-fine particles (nanometer = 10 °) composed of several to several hundred condensates in terms of the number of atoms / molecules, it has a very large surface energy, so that its physicochemical properties are remarkable. Although it is known that a change appears, these fine particles are electrically negatively (-) or positively (+) due to adsorption of ions or ions on the back surface of the platinum colloid.

With respect to the platinum colloid produced by the method of the above example, the oxidation-reduction potential in the processing solution in which the reduction reaction proceeds was measured. Table 1 shows the measurement results.

[0067]

[Table 1]

Table 1 shows that the electric double layer is formed on the platinum particles and turns into a colloid, that is, the electric double layer is formed on the platinum particles. First, the potentials of the platinum ion solution and the treatment solution after the addition of the pH compensating agent are +
The value of 64 mV changed to a negative potential as the reduction reaction progressed, and the value increased with the passage of time. When an electric double layer is formed on the particles, an electrostatic repulsion acts between the platinum particles, and the platinum particles cannot be bonded to each other.

Regardless of whether the particle charge is positive (+) or negative (-), the higher the potential, the more stable the colloid of platinum becomes. Thus, a value of -406 mV or less and a value of -415 mV after filtration were obtained. Table 1 also shows that the platinum colloid produced by the method of the above example has a negative value of 400 mV or more in the oxidation-reduction potential of the platinum colloid produced by the method of the above example. It has a high activity.

In order to confirm the activity of the platinum colloid obtained by the method of the example, a reaction decomposition test of aqueous hydrogen peroxide (H ₂ O ₂ ) was performed. For comparison, see JP-A-10-68
No. 008 (Production method of highly active metal fine particles) (Prior example 1)
The platinum colloid produced by the method described in (1) was used. The method of the preceding example 1 proposes a method of stabilizing the colloidal state of a metal colloid by reducing metal ions without necessarily relying on a surfactant.

That is, the method of Precedent Example 1 is a method for producing highly active metal fine particles in which a reducing agent is added to a metal ion solution, and a reduction treatment is performed while controlling the temperature and pH to precipitate metal fine particles in the solution. And the temperature of the solution is 20 during the reaction period.
The temperature is controlled to be higher than low temperature in the range of ~ 80 ° C, and the pH is set to 4-1
1, the reduction treatment is a method of reducing metal ions and maintaining a colloidal state without depending on a surfactant (protective colloid).

As a result of the comparative test, the platinum colloid obtained by the method of the above example showed that the aqueous hydrogen peroxide (H) was about four times as fast as the platinum colloid produced by the conventional example 1.
₂ O ₂ ) could be decomposed. Further, the colloidal platinum produced by the method of the present invention showed a decomposition reaction even when the reaction decomposition test was continuously performed 50 times, and no precipitation was observed in the colloid. As a result, a decomposition reaction was observed, but colloidal precipitation was confirmed.

The solution of the platinum colloid produced by the method of the above example was concentrated 6 times, and the solution was kneaded with concentrated glycerin, butylene glycol, polyethylene glycol or the like used as a base to obtain a creamy cosmetic. Was. When the platinum cream (called platinum cream) according to the above embodiment was used on the skin, it made the skin soft and smooth, and at the same time, formed a thin oily film on the skin surface,
In addition to the original effect as a cosmetic cream that reduces the influence of the outside air or sunlight on the skin, the symptoms on the skin surface and various symptoms occurring inside the skin were improved. As described above, Tables 2, 3 and 4 show improvement examples in which the symptoms were improved when the platinum cream produced in the example was used for various symptoms.

[0074]

[Table 2]

[0075]

[Table 3]

[0076]

[Table 4]

The platinum colloid contained in the platinum cream produced by the method of the above embodiment is highly active and stable, and is improved on the skin by the electric double layer effect of the platinum colloid. This is considered to be basically due to activation of the stratum corneum. According to the cases of Tables 2 to 4, even after the symptoms have been improved,
The improved condition seems to persist.

The reason why the improved state is maintained is considered to be largely due to the healing power inherent in humans. However, the ionic electric field (negative (-) electrode) created by the platinum colloid is used as an antibody for immunoglobulin. Extracted,
There may be a place due to that work.

In any case, the improvement effect of the cases shown in Tables 2 to 4 is not unique to the case using the platinum colloid produced according to the embodiment of the present invention, but can be obtained by the method shown in Conventional Example 1. A considerable degree of effect can be obtained even using platinum colloid.

Incidentally, as a method for producing platinum colloid, a so-called combustion method and a precipitation method (metal salt reduction reaction method) are known. The method for producing a platinum colloid described in Examples and the method described in Conventional Example 1 is referred to as a precipitation method (metal salt reduction reaction method), and a platinum colloid having a higher concentration and higher activity than a combustion method is used. It is possible to get.

In the combustion method, a metal ion solution is poured into hydrogen gas or phosphorus to cause a reduction reaction, and then heated by combustion to accelerate the reaction, and the generated metal fine particles are received in a liquid dispersion medium. After the reduction is completed, a process of stabilizing the metal colloid using a surfactant is performed.

According to the experience of the inventors, it seems that it is difficult to produce a high-concentration and high-activity platinum colloid by the "combustion method". If the concentration of the platinum colloid used is low and the activity is low, the effect of improving the symptoms expected by the present invention cannot be obtained.

[0083]

As described above, according to the present invention,
Used for skin and hair as cosmetics for skin care or hair care, it contributes to the maintenance of the homeostasis inherent in the skin and hair and activates it. Healing of injured parts such as cuts, and even pain such as joint pain and muscle pain,
It has excellent efficacy in alleviating itching of athlete's foot.

[Brief description of the drawings]

FIG. 1 is a diagram showing an electric double layer structure in a foreskin.

FIG. 2 is a diagram showing an electric double layer structure composed of colloid particles.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Surface layer 2 Stratum corneum 3 Spinous layer 4 Buffer zone 5 Particle 6 Diffusion layer 7 Fixed layer 8 Sliding surface

Claims (6)

[Claims] 1. Cosmetics in which a platinum colloid is dispersed in a base, wherein the base is a water-soluble component, and is added to adhere the platinum colloid to a human body. Cosmetics. 2. The cosmetic according to claim 1, wherein the platinum colloid is produced by a precipitation method. 3. A colloidal platinum is produced by sequentially performing a reduction treatment and a filtration treatment. Ethanol is used as a reducing agent, polysorbate 80 is used as a surfactant, chloroplatinic acid solution is used as a platinum ion solution, and carbonic acid is used as a pH compensating agent. The cosmetic according to claim 1, wherein the oxidation-reduction potential after completion of the reduction reaction is a negative value of 400 mV or more using sodium hydrogen. 4. A cosmetic in which platinum colloid is dispersed in a base material, characterized in that the platinum colloid activates the stratum corneum by the electric double layer effect of the negatively charged platinum colloid. And cosmetics. 5. The platinum colloid should contribute to the maintenance of homeostasis inherent in the skin by the electric double layer structure created by the surface active energy produced by the nano-sized (nm) ultrafine particles of the platinum colloid. The cosmetic according to claim 4, characterized in that: 6. The colloidal platinum has a similar effect to the skin, and the electric double layer effect of the negatively charged platinum colloid acts on the cuticle of the hair to thereby protect and moisturize the cuticle. The cosmetic according to claim 5, wherein the cosmetic is provided.