JPS6178717A - Foamable bathing agent - Google Patents

Abstract

PURPOSE:To provide the titled bathing agent composed mainly of adipic acid and sodium bicarbonate and/or sodium carbonate, effective to keep the bicarbonate ion concentration, and capable of giving the remedying effect of a hot spring. CONSTITUTION:The objective foamable bathing agent contains sodium bicarbonate and/or sodium carbonate and adipic acid as essential components, wherein the molar ratio of adipic acid to the carbonate falls within the range of ABCD in the figure. The bathing agent may be compounded freely with one or more salts e.g. sulfate such as sodium sulfate, chloride such as sodium chloride, etc. in an amount of <=50wt%. The effect of hot spring can be further promoted by adding perfumery, pigment, vitamins, active component of hot spring, various extracts, crude drugs, etc. to the agent. EFFECT:The agent can be stored relatively stably for a long period, and the damage of the bath heater and bathtub can be mitigated.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a method of dissolving bicarbonate ions a by adding them into bath water and foaming them.
The present invention relates to an effervescent bath agent that lasts for a long time and provides hot spring therapeutic effects to bathers.

(Prior art) Hot spring therapeutic effect by generating carbon dioxide gas bubbles in the bath water, in other words, by giving appropriate stimulation to the skin surface, it activates blood circulation, gives a feeling of relaxation, relieves fatigue, ``#The effect of promoting ``Cheng Dynasty'' has been known for a long time. In the past, various effervescent bath agents, which basically consist of a combination of carbonates such as sodium bicarbonate and sodium carbonate, and organic acids, have been studied. For example, cargo 5f!156-
Publication No. 38124 includes a number about improving the storage stability of effervescent bath additives by a combination of carbonate and tartaric acid, and
JP-A-59-70609 discloses carbonate and succinic acid,
There is a description of the reduction in damage to bathtubs due to the combination of fumaric acid, phosphoric acid, and IJium salts of these organic acids.

In this way, conventional combinations of various carbonates and active acids and combinations of these with sulfates, hydrochlorides, magnesium oxide, aluminum/sodium acids, OMO, )IPO, gelatin, starch, etc. have been conventionally used. As a result, it is possible to provide a stabilizing effect on long-term storage and a corrosive reducing effect on bathtubs and bathtubs, and some of them have become popular.

(Problems to be Solved by the Invention) However, when tracking changes over time in the ion concentration of charcoal, a foaming bath agent that has been used in the past, it is found that after adding the bath agent,
It rises rapidly, but then shows a clear downward trend, and about 1
It was found that after some time, the concentration of bicarbonate ions decreased to below the maximum bicarbonate ion concentration.

(Means to Solve the Problems) The present inventors have solved these problems by using an economical bicarbonate ion +
It is ideal as a foaming bath agent because of its low rate of decrease in /fi degree, that is, it is stable for long-term storage, and
As a result of intensive research into foaming bath additives that do not damage bathtubs or bathtubs, we found that n-lithography, which is an organic acid that has been widely used in the past,
It has been found that a significant improvement can be observed by using anopic acid in place of cono-phosphoric acid, fumaric acid, malic acid, citric acid, and the inorganic acid phosphorus, and the present invention has been completed.

That is, the present invention provides an effervescent bath agent containing a carbonate consisting of sodium bicarbonate and/or sodium carbonate and an organic acid as basic components, in which adipic acid is used as the organic acid, and the ratio of adipic acid to the mole of carbonate is This foaming bath agent is characterized in that the molar ratio of .

Unless the organic acid is adipic acid, a long-lasting hot spring effect cannot be obtained, and the molar ratio of the combined charge of adipic acid to 1 mole of carbonate is 0.96 (mermaid) as shown in Figure 1.
, 0.47 (point B), o, os (point C), 0.56 (
The above objective cannot be achieved unless it exists within the customary area surrounded by point D).

If the molar ratio of adipic acid is above the line AB in Figure 1, the pH will be below 5.7, which may cause damage to the slightly acidic human body, and may cause damage to the bathtub. , the corrosion of the bathtub increases significantly. In the following regions (see the line connected by OD in Figure 1), it is inappropriate to have a pH of 7.0 or higher because dissociation into bicarbonate ions will be inhibited. Furthermore, by using adipic acid, the hygroscopic property of adipic acid can be effectively utilized, and the adverse effects of moisture absorption can be suppressed during long-term storage, resulting in a very stable bath agent.

The carbonate used in the present invention is sodium bicarbonate, sodium carbonate alone or a mixture thereof. Also, sodium sesquicarbonate, which is originally a mixture of sodium bicarbonate and sodium carbonate, can be used.

In addition to the above, the bath additive of the present invention includes sulfuric acid, IJum (
Glauber's salt), sulfates such as magnesium sulfate and zinc sulfate, and hydrochlorides such as sodium chloride and magnesium chloride may be used alone or in combination of two or more. Its fecal dosage is 50% by weight or less as a bath additive.

Furthermore, commonly used fragrances, pigments, vitamins, active ingredients of hot springs, various extracts, herbal medicines, surfactants, etc. can be added to further enhance the hot spring effect.

The bath preparation of the present invention can be formed into powder, granules, tablets, etc., and OMO, HP
O, excipients such as gelatin, crystalline cellulose, and starch;
Binders, disintegrants, lubricants, etc. can be added.

(Effects) The effervescent bath agent of the present invention can maintain the amount of bicarbonate ions contained in the bath at a high concentration for a long period of time. It has been thought that the hot spring-like effect decreases drastically after 2 hours or more, but with the present invention, the hot spring-like effect can be sustained for 2 hours or more, making it possible to impart the hot spring-like effect to more bathers. Become. In addition, the low hygroscopicity of anopic acid,
Due to its characteristics such as low corrosiveness, it is relatively stable during long-term storage and also has the effect of reducing damage to bathtubs and bathtubs.

(Example) Hereinafter, it will be explained in detail by giving examples.

Examples 1 to 8 and Comparative Examples 1 to 5 Effervescent bath preparations shown in Table IK were formulated, and 500η/tablet samples were prepared. These were added to a constant temperature water bath at 40°C so that the concentration on the bath side was 0.025%, and the pH and
Changes in IC (inorganic carbon) were measured. The results are shown in Table-1. The amount of carbon decomposed at 160° C. was measured using an IC1ViTOO analyzer (TOCIOB, Shimadzu Corporation), and was converted to the amount of monocarbon acid ions.

Table-1 (Double amount %) (Note) Numbers in parentheses indicate the number of moles of Keido.

Example 9 The tablets of Example 7 and Comparative Examples 3 and 4 were heated at 40°C and 70RH%.
It was left in this environment for 3 days. As a result, no difference was observed in the thickness of the tablets of Example 7 compared to before the test, but the tablets of Comparative Examples 3.4 were significantly swollen and their shapes were destroyed.

Example 10 Using the tablets of Example 7 and Comparative Examples 3 and 4, the solid content conductivity was 0.
．． 10 tons of copper powder was added to 1 ton of aqueous solution adjusted to 3 wt% and left for 1 week at 40°C.Cu+ dissolved in the water was measured using an atomic absorption spectrometer. The amount of bath output was low.

[Brief explanation of drawings]

FIG. 1 is a graph showing the ratio (weight molar ratio) of adipic acid to carbonate in the present invention. Patent developer Asahi Kasei Corporation Figure 1

Claims (1)

[Claims] 1. Effervescent bath agent mainly consisting of sodium hydrogen carbonate and/or sodium carbonate and adipic acid 2. The molar ratio of sodium hydrogen carbonate and/or sodium carbonate to adipic acid is as shown in FIG. The foaming bath agent according to claim 1, which is present in the area surrounded by ABCD in the foaming bath agent.