JPS63250316A - Bathing agent - Google Patents

Abstract

PURPOSE:To obtain a bathing agent settling in bathtub, having no change in color, long evolving time of carbonic acid gas and low moisture absorption, comprising a carbonate, sesquicarbonate or bicarbonate of alkali metal and potassium dihydrogenphosphate as main components, by making size of tablet and pH during dissolution in water into specific ranges. CONSTITUTION:One or more of carbonate, sesquicarbonate and bicarbonate of alkali metal or alkaline earth metal are blended with potassium dihydrogenphosphate and, if necessary, other bathing components, an excipient, a moisture absorption inhibitor, perfume and a dyestuff. The blend is molded into >=1.0g per tablet and has 4.5-8.0pH when 1g of the tablet is dissolved in 100ml water. The blend is tableted by press into tablets and preferably is optionally mixed with a surface active agent, an excipient and a binder such as polyethylene glycol, CMC, HPC and gelatin.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a bath-use product that generates and dissolves carbon dioxide gas bubbles when added to a bath, and the carbon dioxide gas and dissolved components exert the effect as an active ingredient for baths. This is related to drugs.

The university recognizes the effectiveness of hot springs, and the corresponding symptoms are determined by the components of the hot springs.

Natural hot springs can be roughly divided into (simple springs), salt springs, and mirabilis springs.

Alkaline springs 1 gypsum spring, bitter earth spring, meyo spring, iron spring, sulfur spring,
There is a carbonated spring (radium spring), and the content is Nt;
, Ca″:Mi, P;′, CI′, 8r′, SO′,
',PO;',JIBOj,',HCO',,H5
:Contains inorganic ions such as SiO'z, and bath preparations are commercially available with this combination.Other artificial bath preparations include soju, valerian, ginseng, cinnamon bark, fennel, chimpi, etc. herbal medicine ingredients (b), flavoring ingredients such as methyl salicylate, menthol, turpentine oil (c), and soybean oil.

Oily ingredients (d) such as rice bran oil, liquid paraffin, squalane, and lecithin, potash soap, and surfactants.

Decontamination ingredients such as enzymes (e), egg yolk, skim milk powder, nutritional ingredients such as vitamins (e), pigments, clay, magnesium carbonate,
Colored and cloudy ingredients (g) such as mica powder are also said to be effective.

(Prior art) Although the bath preparations containing the above-mentioned active ingredients (a) to (g) have respective medicinal effects, they cannot reproduce the natural hot springs as they were, but research efforts are being made to approximate them as much as possible. has been done. One of them is carbonated springs, which, apart from drinking, have been shown to be effective against neurosis and skin allergies, and ++co/3. It is said that not only the dissolved ions of CO; but also the foaming phenomenon of CO□ are important factors.

About this foaming type: ■Sodium carbonate.

■Contains organic acids such as tartaric acid, succinic acid, and fumaric acid using sodium bicarbonate as the carbonate source; ■Contains phosphoric acid and sodium hydrogen phosphate; ■Double salt of sodium carbonate and sodium sulfate and organic acids. It is known that the composition is as follows. Also, briquette-like products made from a combination of succinic acid and sodium bicarbonate are commercially available.

(Problems to be Solved by the Invention) In the prior art sodium bicarbonate and succinic acid combinations described above, the acid substance for generating CO□ is an organic acid. Even if other solid organic acids such as tartaric acid, citric acid, malic acid, and adipic acid can be used, secondary organic acids are not recognized as active ingredients in (a) to (g) above, that is, they are useless ingredients. And they are relatively expensive.

Regarding the briquette type, commercially available products are large and when put into a bath, they initially settle and foam vigorously, but eventually they float to the top of the bath water and the foaming effect of CO2 is no longer observed. The drawback is that the duration is short, less than 5 minutes even for an 80g product.

What is more important is that in mixed preparations of alkali carbonates and acids, it is naturally expected that reactions will occur, and this will deteriorate over time during storage. Since this reaction occurs in the presence of moisture, a chemical with low hygroscopicity should be selected. For example, there is a proposal to substitute adipic acid, which has improved hygroscopicity among the known organic acids mentioned above.

(Method for Solving the Problems and Effects) The present invention comprises one or more carbonates of alkali metals or alkaline earth metals, sesquicarbonates, bicarbonates, and potassium dihydrogen phosphate (KIlzPO4) as main components. Then, when necessary, other bath ingredients, excipients, moisture absorption inhibitors, fragrances, 2 pigments, etc. are added, and the mixture is made into 1.
Molded into a tab left of 0g or more, 1g of it is 100m・
It is characterized by a PR of 4.5 to 8.0 when dissolved in 1 liter of water.

The carbon dioxide gas generation mechanism of the present invention, taking baking soda as an example, converts NaHCOx+ into HzPOa=NaKIIPOs+
HtO+COt---(1), and the Na' produced by this is combined with @PO4, /// and C (h is an active ingredient for bathing).

It is said that C(h) generated in baths adheres to the skin of the human body, especially near the pores, and promotes metabolic function.Also, the truth or falsity of the theory that the ultrasonic waves generated when bubbles burst have a beauty effect. Apart from this, the foaming phenomenon during bathing is certainly refreshing.Thus, when we think about household bath products, home bathtubs are 160~200A. The Ministry of Health and Welfare has set a customary standard for the amount of the agent at 25g per ingredient.This means that even if this amount is injected, the carbon dioxide gas will be absorbed into the bathtub in a concentrated manner and no foaming will occur. Even if a powdered product is added, the foaming of CO□ is instantaneous and does not last long and does not work during bathing.

Therefore, it is necessary to locally increase the concentration of both drugs.

For this purpose, in the present invention, the blended product was press-tableted into a tablet shape. Surfactants, polyethylene glycol, and CMC are used as necessary for this molding.

Excipients such as HPC, gelatin, starch, binders, disintegrants, lubricants, etc. can be added. Since tablets undergo the reaction (1) in the presence of moisture, this must be kept in mind during formulation and storage. When placed in a bath, CO2 gas is generated and the tablet dissolves. However, at this time, strangely, if the tablet is too small, the CO□ generated wraps around the tablet, reducing its specific gravity.
It floats to the surface of the bath. Since this phenomenon is undesirable as it interferes with the tranquilizing effect during bathing, the tablet should sink to the bottom of the bathtub. This condition is affected by the size of the tablet, so
An experiment was conducted on tablets molded at the same pressure of 100 kg/ca+''.

The sample composition is as follows. (wtχ) Invention product: Na)IcO: + 37.4. KHzP
Ot 60.6. Excipient 2.0 conventional product ■: NaHCO
z 42.0. NaHzPOa 56.0. Excipient 2
．． 0 Conventional product■: Na1lCO356,7, succinic acid
41.3. Excipient 2.0 conventional crystal ■: Na1CO326
, O+ NazSOa 35.0 Tartaric acid 37. O excipient 2.0 Table 1 Symbol A in the table: floats on the surface.

B: Floating near the bath surface.

C: Move to the middle to upper surface of the bath.

D: Move to the lower to middle level of the bathhouse.

E: Sediments to the lower part of the bathtub.

As shown in Table 1, the conventional product does not sink to the bottom of the bathtub unless it is of a considerable size, but the product of the present invention will settle in the bathtub if it weighs more than 1 g. This has the advantage of increasing the number of foaming sources because several foaming bath additives can be added when taking a bath.If the foaming bath additive is placed in a position where it floats to the surface of the bath, CO2 gas will be unnecessarily released into the air, so it cannot be used as a bath additive. There is no effect.

The reason why the product of the present invention does not float is thought to be due to the balance between the carbon dioxide gas generated and the released gas, although it is also related to its specific gravity. This is because the reaction does not occur instantaneously, but continues uniformly over time. Table 2 shows the results of measuring the duration (minutes) of carbon dioxide gas generation using the briquettes shown in Table 1.

Table 2 Next, a problem with foaming bath agents is their deterioration over time.

As mentioned above, since it is a mixture of alkaline and acid chemicals, the reaction tends to proceed when moisture is present and the temperature is high.

Therefore, care is taken to seal the product with aluminum foil to prevent it from getting exposed to moisture in the air, but even so, it is inevitably used in a bathroom with high humidity, so consumers stock it near this area, so packaging is difficult. There have been cases of large scale and rupture accidents.

Furthermore, when the product is transported and stored at high temperatures, sodium hydrogen carbonate self-decomposes and releases H,0, which triggers the rapid progress of the reaction (1). This comparative experiment was conducted under various conditions using 5.0 g of the briquettes, and the results are shown in Table 3.

Table 3 The degree of deterioration in the table is (CO□ generation after test/CO before test
2 generation amount) X100.

The next problem was the discoloration of the bathtub material. If the bathtub is made of resin or tiles, there will be no change, but if the bathtub is made of metals such as stainless steel or aluminum, rainbow-colored discoloration or, in severe cases, black spots may be observed. When investigating the cause of this, it became clear that when the tablets that had sunk to the bottom of the bathtub melted, a highly concentrated solution formed at the contact surface, which had an effect on the metal.

This discoloration phenomenon is particularly noticeable on 13Crl plates, and although it does not lead to corrosion, it impairs the aesthetic appearance. As a countermeasure to this problem, we investigated various drug formulations and found that the drug does not appear if the pH of the solution is at least between 4.5 and 8.0. The measured concentration of PH in this place is 1.0g/Loo
This is carried out using a solution dissolved in ml. In other words, a normal household bathtub is 1
Since 801 is the standard, it is 0.12g/1, but
It is clearer if the concentration is 100 times higher.

In this pH range, the phenomenon of discoloration of the contact surface between the briquette and the stainless steel plate (water stainless steel) does not occur with the formulation of the present invention, but the tartaric acid formulation exhibits a phenomenon in which the discoloration is particularly significant.

The significance of setting PR between 4.5 and 8.0 may be thought of as common sense, but it is important in relation to discoloration of bathtubs. That is, in the reaction [1] above, Na''-H
Since the reaction between C0 and - is a buffering reaction, when complete carbon dioxide gas generation is expected, the theoretical value is 5.8, but when actually measured, it is 4.5 or less. Therefore, the objective can be achieved by adding more salts of polyvalent inorganic substances than the theoretical value of [1], but even in this case, if it is immediately dissolved in the bath, the pH will be higher than 4.5 due to other components in the water. This does not affect the bathtub material, but when it is made into tablets, the concentration is high where it begins to dissolve, so it has a large effect.

Therefore, it is better to mix more carbonate than the theoretical value, and the pH at this time is Ig/100ml concentration, and the above 4.
, 5 to 8.0.

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(Example) Example 2 Dry sodium sulfate 12.0 parts by weight Sodium chloride io, o Sodium hydrogen carbonate 29.0 Potassium dihydrogen phosphate 46
．． 4. Arum extract 0.1. Flavoring 0.5. Lactose 2.0. Coloring agent trace amount. Ethanol 1.5. Total 101.5. The above was mixed and compression molded into massifuku molds each weighing 50 g to obtain the product of the present invention. Obtained. 6.81 When the product of the present invention was placed in a bath, it did not rise to the surface of the bath for about 8 minutes, and no water stain phenomenon was observed, in which the product bubbled and dissolved from the bottom of the bath.

Example 3 Anhydrous potassium carbonate/sodium 43 Part by weight Potassium dihydrogen phosphate 30 Potassium polysulfide 5 Magnesium carbonate 1O Sodium acid sulfate 2 Sodium primary borate 5 Starch
3 Polyethylene glycol 2
A total of 100 pieces were mixed and molded into 20g pieces to obtain a product of the present invention.

PH is 7.2. It is. This bath agent generates carbon dioxide gas, and colloidal sulfur precipitates in the bath, making it cloudy and allowing you to enjoy the feeling of a natural hot spring.

(Effects of the Invention) (1) Among carbon dioxide foaming bath additives, the products of the present invention contain more active ingredients for bathing than conventional products containing organic acids.

2. It is observed that carbon dioxide gas is generated more stably and for a longer time than conventional carbon dioxide foaming bath agents.

3. The product of the present invention sinks to the bottom of the bathtub and rises to the surface, so there is no ineffective release of carbon dioxide gas.

4. Has low hygroscopicity and can withstand changes over time.

5. Discoloration and corrosion of metal materials can be avoided.

that's all

Claims (1)

[Claims] One or more carbonates, sesquicarbonates, and bicarbonates of alkali metals or alkaline earth metals, potassium dihydrogen phosphate, and, if necessary, other bath components, excipients, and moisture absorption inhibitors. , fragrance, and pigment, and mold the mixture into tablets each weighing 1.0 g or more.
PH is 4.5-8 when g is dissolved in 100ml of water.
．． A bathing agent characterized by having a concentration of 0.