JP2012171871A - Bath agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath agent which simply and safely enables bathing in hydrogen water.SOLUTION: Fine-grained magnesium hydride is incorporated into a bath agent. When the magnesium hydride is added to a bathtub having a water depth of 20 cm at 40°C at a ratio of 2.5 mg per liter water, the amount of hydrogen after 30 min becomes 0.01 mmol/L or more and it is preferred that the magnesium hydride has such a particle diameter as not to surface. Further, the average particle diameter is preferably 10-120 μm.

Description

  The present invention relates to a bath agent that can be simply and safely bathed with hydrogen water.

  When gaseous hydrogen is dissolved in water, the water (hydrogen water) becomes functional water to which the oxidation-reduction potential (ORP) is shifted to the reduction side and to which antioxidant ability is imparted. It is expected to be applied in a wide range of fields such as preventing skin aging, reducing oxidative stress, preventing adult diseases, and maintaining health through anti-aging.

  Attempts have also been made to use hydrogen water having such functionality as hot water for a bath. For example, Patent Document 1 discloses a method for continuously producing hydrogen water, a production apparatus therefor, and a bath apparatus and a bathroom apparatus using hydrogen water. Patent Document 2 discloses a hydrogen generator in which a powder of a hydrogen compound such as an alkaline earth metal hydride is embedded in a water-soluble compound such as polyethylene glycol, xylitol, or trehalose. It is described to be used as a bath agent.

JP 2008-6365 A Japanese Patent No. 4384227

  However, the bathing apparatus disclosed in Patent Document 1 has a problem in that it involves a risk of gas leakage and the like because the hydrogen gas supply unit is provided. In addition, special equipment is necessary and it is not suitable for home use. On the other hand, the hydrogen generating agent of Patent Document 2 reacts with an alkaline earth metal hydride and water to generate hydrogen in water, but polyethylene glycol, xylitol, or trehalose is used to control the amount of hydrogen generated. It was necessary to embed it in acid or to contain acid. In addition, there is a problem that it is difficult to stably control the amount of hydrogen generation.

  An object of the present invention is to provide a bath agent that can be simply and safely bathed with hydrogen water.

  As a result of intensive studies by the present inventors in order to achieve the above object, it has been found that hydrogen can be stably generated with good reproducibility by the reaction between finely divided magnesium hydride and water, and the present invention is completed. It came to.

  That is, the bath agent of the present invention is characterized by containing finely divided magnesium hydride.

  In the present invention, when the magnesium hydride is added in a ratio of 2.5 mg to 1 liter of water in a 40 ° C. water tank having a water depth of 20 cm, the amount of dissolved hydrogen after 30 minutes is The particle diameter is preferably 0.01 mmol / L or more and does not float.

  In the present invention, when the magnesium hydride is added in a ratio of 2.5 mg to 1 liter of water in a 40 ° C. water tank having a water depth of 20 cm, the amount of dissolved hydrogen after 30 minutes is It is preferable that the particle size is 0.01 mmol / L or more, the amount of volatilized hydrogen to the outside air is 0.03 mmol or less, and does not float.

  Moreover, it is preferable that the average particle diameter of the said magnesium hydride is 10-120 micrometers.

  The bath agent of the present invention is preferably prepared such that 0.5 to 125 mg of the magnesium hydride is added to 1 liter of bath water.

  According to the bath agent of the present invention, hydrogen can be generated by a reaction between finely divided magnesium hydride and water, and the amount of dissolved hydrogen in the hot water of the bath can be stably increased with good reproducibility. Therefore, bathing with hydrogen water can be performed simply and safely, and the antioxidant effect and blood flow promoting effect of the hydrogen water can be expected.

6 is a chart showing an average of results of fluctuations in dissolved hydrogen amount in Test Example 1. It is a graph which shows the result of the fluctuation | variation of the expiration | expired_air hydrogen amount of the test example 2 for every panelist.

Magnesium hydride is a compound that holds hydrogen in the gaps between metal atoms of magnesium, and decomposes while releasing hydrogen by reacting with water according to the reaction formula of the following formula (1).
MgH ₂ + 2H ₂ O → Mg (OH) ₂ + 2H ₂ (1)

  Although there are various methods for producing magnesium hydride, it can be efficiently produced by, for example, methods disclosed in Japanese Patent No. 4083786 and Japanese Patent No. 4425990.

  Specifically, as disclosed in Japanese Patent No. 4083786, a raw material powder containing magnesium as a main component is held in a hydrogen gas atmosphere sealed in a sealed container, While maintaining the pressure of the hydrogen gas atmosphere at a predetermined pressure, the temperature of the hydrogen gas atmosphere in the enclosure is on the equilibrium curve between the reaction in which single magnesium and hydrogen molecules combine to produce magnesium hydride and the reverse reaction. The coating on the surface of the raw material powder is removed by maintaining at a temperature higher than the temperature corresponding to the predetermined pressure and at a temperature difference from the temperature within a predetermined value for a predetermined first period, Next, without returning the temperature of the hydrogen gas atmosphere in the enclosure to room temperature, the temperature is lower than the temperature corresponding to the predetermined pressure on the equilibrium curve, and the temperature difference from the temperature is within a predetermined value. is there Time to, by maintaining a predetermined second period, the production of magnesium hydride from the raw material powder. According to this method, magnesium hydride having a high hydrogenation rate can be efficiently produced. Further, as disclosed in Japanese Patent No. 4425990, instead of powder raw material, a compressed product is prepared by compressing a plurality of flakes mainly composed of magnesium and compressing them in a hydrogen gas atmosphere. You may make it react with gas. According to this method, magnesium hydride having a high hydrogenation rate is manufactured more safely than a method of manufacturing from a powder raw material that may cause a dust explosion because it is manufactured from a flake mainly composed of magnesium. It can be manufactured efficiently.

The hydrogenation rate is a percentage of the amount of hydrogen that can be ideally occluded according to the molecular weight 26 of MgH ₂ and the molecular weight 24 of Mg, and the mass before and after hydrogen occlusion is measured when magnesium hydride is produced. It is obtained as in (2).

  Magnesium hydride obtained by the above method usually has a hydrogenation rate of about 70 to 100, more preferably about 90 to 100%, which is higher than other hydrogen storage alloys and is resistant to chemical deterioration. Although it is stable and easy to handle in terms of workability such as transportation, supply, storage, etc., it is an excellent hydrogen storage material, but on the other hand, it reacts slowly with water in water, and from the aspect of hydrogen generation rate There are difficulties.

Therefore, finely divided magnesium hydride is used for the bath agent of the present invention. According to this, even if the reaction is not promoted with an acid or the like, hydrogen generation suitable as a bath agent can be realized as shown in the examples described later. Further, since hydrogen is generated as fine gas particles, the generated hydrogen does not volatilize to the outside air, and it is easy to make a dissolved state with water. The average particle size of magnesium hydride is preferably 10 to 120 μm, and more preferably 20 to 80 μm. When the average particle size is large, the hydrogen generation rate tends to decrease, and when used in hot water, the rough feeling of magnesium hydride tends to remain. If the average particle size is too small, static electricity increases due to atomization and wettability decreases, so that when used in hot water, it tends to float on the surface, making it difficult to increase the amount of dissolved hydrogen. Specifically, when the magnesium hydride is added at a rate of 2.5 mg to 1 liter of water in a 40 ° C. water tank having a water depth of about 20 cm, the dissolved hydrogen amount after 30 minutes is 0.01 mmol / L. As described above, it is more preferable that the particle size is 0.03 mmol / L or more and does not float. Furthermore, it is preferable that the amount of volatilized hydrogen to the outside air is 0.03 mmol or less, preferably 0.01 mmol or less under the conditions.
As a measuring method for obtaining the average particle size of magnesium hydride, a method of estimating the particle size value from the analysis of the diffraction peak shape observed by a powder X-ray diffractometer is simple and preferably used. The fine particles may be formed by a known method, and there are no particular restrictions on the apparatus and method. For example, a jet mill or a high-pressure gas ultrafine pulverizer can be used. Also, pulverization in a mortar can be used as a simple method.

  The bath agent of the present invention preferably contains 0.1 to 25 g of the above magnesium hydride, more preferably 0.5 to 20 g, and more preferably 0.5 to 10 g in 25 g of a 200 L bath agent. It is most preferable to contain. The dosage form is preferably a powder formed by mixing together with a raw material having a low water content in order to prevent the magnesium hydride from reacting with water.

  In addition to the above magnesium hydride, known additives and other components can be added to the bath agent of the present invention. Examples thereof include alcohols such as ethanol, nonionic surfactants, polysaccharides, low molecular sugars, natural fats and oils, emulsifiers, and fragrances.

  The bath agent of the present invention is preferably prepared such that the magnesium hydride is added in an amount of 0.5 to 125 mg, more preferably 2.5 to 50 mg, per liter of bath water. At the time of use, the amount of dissolved hydrogen increases to 0.01 mmol / L or more within 15 minutes after the bath agent is added to hot water, and then increases to 0.03 mmol / L or more by 60 minutes. It is preferable that the amount of dissolved hydrogen increases to about 0.04 mmol / L within 15 minutes after the bath agent is added to hot water, and then increases to about 0.05 mmol / L by 60 minutes. More preferably, it is prepared.

  The present invention will be specifically described below with reference to examples, but these examples do not limit the scope of the present invention.

<Production Example 1>
Ingot-shaped magnesium hydride (hydrogenation rate: 90 to 95%) is prepared by the method disclosed in Japanese Patent No. 4425990, and this is coarsely crushed by a mill and pulverized to about 0.1 mm. Milled with a mill. The particle size of the obtained magnesium hydride was 60 μm according to analysis using a powder X-ray diffractometer.

<Test Example 1>
0.5 g of the magnesium hydride obtained in Production Example 1 was blended with a commercially available bath agent component to prepare 25 g (200 L) of a bath agent.

  Moreover, hot water 50L (water depth 20 cm) was put into a water tank for tropical fish (width 60 cm × length 30 cm × depth 40 cm), and the water temperature was kept at 40 ° C. with a heater to form a bathtub model. To this was added 6.25 g of the ¼ amount of the above bath agent, and the mixture was stirred twice with a 50 cm long plastic ruler. Thereafter, the water flow was not particularly caused, and the dissolved hydrogen concentration was measured 0, 15, 30, 60, 120, and 180 minutes after the bathing agent was added. For measurement, a dissolved hydrogen meter “Micro-sensor Multi-Meter (H2 sensor)” (manufactured by UNISENSE) was used, and the measured value for each time was observed while the electrode was kept in the hot water in the water tank. The room was not ventilated, and the temperature and humidity were controlled by the installed air conditioning. The test was performed a total of 8 times with different dates.

  Table 1 shows the results of eight tests in total, and FIG.

  As a result, the amount of dissolved hydrogen increased to an average of about 0.036 mmol / L between 0 and 15 minutes after putting the bath agent, and the amount of dissolved hydrogen gradually increased over time. Although not shown in Table 1 and FIG. 1, the amount of dissolved hydrogen when the measurements of tests 6 to 8 are continued after 180 minutes reaches a maximum of 0.1 mmol / L, and thereafter tends to maintain that value. Was recognized. This concentration was a high value corresponding to 12.5% of the saturated dissolved hydrogen concentration.

<Test Example 2>
The increase or decrease in the amount of hydrogen in the human breath when bathing with hydrogen water was examined.

  Therefore, 25 g of the bathing agent used in Test Example 1 was put in 200 L of hot water, and the panel was bathed about 30 minutes after the amount of dissolved hydrogen was stabilized, and the amount of hydrogen was measured by collecting the exhalation at each elapsed time. . For the measurement, “Breath Gas Analyzer MODEL TGA-2000” (manufactured by TERAMECS) was used. Regarding the collection of exhaled air, a collection container with a three-way cock attached to an aluminum pouch was used, and after exhaling air in the airway, only exhaled gas that passed through the lungs was collected as much as possible. In addition, in order to avoid taking in hydrogen from breathing as much as possible, the bathtub is covered, and the gap between the panel and the panel is covered with vinyl, blocking hot water and the respiratory organs as much as possible, and ventilation in the bathroom. I went with enough. The test was conducted by a total of 13 panelists at different times.

  Table 2 shows the test results for each panel, and FIG. 2 shows the results in a graph.

  As a result, although there were individual differences, there was a tendency for the amount of hydrogen in the exhalation to increase by bathing in hot water containing a bath preparation formulated with magnesium hydride obtained in Production Example 1. The increase in the amount of hydrogen in the breath of the panelist was because the amount of hydrogen in the bathroom air near the respiratory of the paneler measured at the time of the test was constant at about 1.0 to 6.8 ppm. It was thought that dissolved hydrogen in hot water was absorbed from the skin during bathing. During the test, the concentration of hydrogen gas in the bathroom air was much lower than the explosion limit of 4 to 75 (v / v)%, and there was no danger of explosion.

  According to the bath agent of the present invention, bathing with hydrogen water having functionality such as antioxidant ability can be enjoyed simply and safely.

Claims (5)

  A bath agent characterized by containing finely divided magnesium hydride.   The magnesium hydride has a dissolved hydrogen content of 0.01 mmol / L after 30 minutes when the magnesium hydride is added at a rate of 2.5 mg to 1 liter of water in a 40 ° C. water bath having a water depth of 20 cm. The bath preparation according to claim 1, wherein the particle size is such that the particle size does not float.   The magnesium hydride has a dissolved hydrogen content of 0.01 mmol / L after 30 minutes when the magnesium hydride is added at a rate of 2.5 mg to 1 liter of water in a 40 ° C. water bath having a water depth of 20 cm. The bath agent according to claim 1, wherein the particle size is such that the volatilized hydrogen amount to the outside air is 0.03 mmol or less and does not float.   The bath magnifying agent according to any one of claims 1 to 3, wherein the magnesium hydride has an average particle size of 10 to 120 µm.   The bath preparation according to any one of claims 1 to 4, which is prepared so that 0.5 to 125 mg of the magnesium hydride is added to 1 liter of bath water.