Method for using bath agent

Abstract

To provide a method for using a bath agent that can maintain sterilization and disinfection effects in bath water containing a chlorine agent while suppressing changes in the color tone of the bath water.SOLUTION: Bath water W is circulated and used in a circulation-type bathtub 1, and a sterilization and disinfection effect is exhibited by the addition of a chlorine agent. The bath agent added to the bath water W contains a tar pigment and an ammonium salt, and the bath water W to which the bath agent has been added is colored by the tar pigment. Due to the presence of chlorine from the chlorine agent and the ammonium salt contained in the bath agent, the bath water W can maintain sterilization and disinfection effects while suppressing color tone changes of the pigment within a combined chlorine concentration range of 3 to 10 mg / L, thereby suppressing changes in the color tone of the bath water W.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technical field of this specification relates to a method for using a bath additive that is added to bath water containing a chlorine agent and contains a pigment to impart color, and that can suppress changes in the color tone of the bath water while maintaining the bactericidal and disinfecting effects of the chlorine agent. [Background technology]

[0002] Public baths, super sento, hot spring baths, and other facilities use circulating baths, which circulate bath water to reduce the amount of water used. Because circulated bath water can breed bacteria harmful to the human body, such as Legionella spp., chlorine is added for sterilization and disinfection. Bath additives are used in these public baths, super sento, and hot spring baths. These bath additives are added to the bath water to color the water with dyes, providing bathers with a sense of mental relaxation and enhancing the bathing experience. However, there is a problem in that some of the dyes contained in the bath additives are bleached by the chlorine from the chlorine additive, causing the color of the bath water to change over time. In response to this, bath additives that can suppress changes in the color tone of bath water have been known for some time, and Patent Documents 1 and 2 describe bath additives that can suppress changes in the color tone of bath water by incorporating a chlorine neutralizer into the bath additive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 53-27770 [Patent Document 2] Special Publication No. 59-6283 Summary of the Invention [Problem to be solved by the invention]

[0004] However, although bath water containing a bath additive containing a chlorine neutralizer can prevent changes in the color of the bath water, it has the problem of neutralizing the chlorine from the chlorine agent used for sterilization and disinfection, thereby eliminating the sterilization and disinfection effects of the bath water.

[0005] The problem that the technology of this specification aims to solve has been made in consideration of the above points, and its object is to provide a method for using a bath additive that can suppress changes in the color tone of bath water containing chlorine agents while maintaining the sterilizing and disinfecting effects. [Means for solving the problem]

[0006] A method for using a bath agent according to an embodiment of the present specification is a method for using a bath agent that is added to bath water in a bathtub, The bathtub is a circulating bathtub in which the bath water is circulated and used, The bath agent contains a tar colorant and an ammonium salt and is added to the bath water, The bathing water contains a chlorine agent for sterilization and disinfection, and has a combined chlorine concentration of 3 to 10 mg / L. It is characterized by:

[0007] According to the method for using the bath additive of the embodiment, bath water is circulated in a circulating bathtub and used, and a chlorine agent is added to the bath water to achieve sterilization and disinfection effects. The bath additive contains a tar dye and an ammonium salt, and the bath water to which the bath additive has been added is colored with the tar dye. Due to the presence of chlorine from the chlorine agent and the ammonium salt contained in the bath additive, the bath water can maintain its sterilization and disinfection effects while suppressing color changes in the dye, thereby suppressing color changes in the bath water, at a combined chlorine concentration in the range of 3 to 10 mg / L.

[0008] Here, in the method of using the bath additives, the tar dye may be one or more selected from Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2, Orange No. 205, Yellow No. 202 (1), Green No. 201, Green No. 204, and Blue No. 205.

[0009] This makes it possible to suppress changes in the color of bath water while maintaining the sterilizing and disinfecting effects.

[0010] In addition, in the method for using the bath additive, the tar dye may be one or more selected from Red No. 2, Red No. 102, Yellow No. 4, Yellow No. 5, Green No. 3, and Blue No. 2.

[0011] This makes it possible to suppress changes in the color of bath water while maintaining the sterilizing and disinfecting effects.

[0012] In the method for using the bath agent, the ammonium salt may be ammonium sulfate or ammonium chloride.

[0013] This makes it possible to maintain the sterilizing and disinfecting effects while suitably suppressing changes in the color tone of the bath water.

[0014] In the method for using the bath agent, the chlorine agent may be sodium hypochlorite or sodium dichloroisocyanurate.

[0015] This allows the bath water to be suitably sterilized and disinfected, and also allows changes in the color tone of the bath water to be suitably suppressed. [Effects of the Invention]

[0016] According to the method of using the bath agent of the embodiment, it is possible to suppress changes in the color tone of the bath water while maintaining the bactericidal and disinfecting effects. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a conceptual diagram of an example of a circulating bathtub in which the bath agent of the present invention is used. DETAILED DESCRIPTION OF THE INVENTION

[0018] The following describes a method of using the bath additive according to an embodiment of the present specification. However, the technology of the present specification is not limited to these embodiments. The bath additive according to the embodiment is used in a circulating bathtub 1 shown in FIG. 1, in which bath water W is circulated. Circulating bathtubs 1 are used, for example, in public baths, super public baths, or hot spring baths (hereinafter sometimes referred to as public baths, etc.). The bath water W in the circulating bathtub 1 is circulated and used, and a chlorine agent is added for sterilization and disinfection.

[0019] The chlorine agent is a compound that is added to bath water W and exerts a sterilizing and disinfecting effect on the bath water W. Examples of chlorine agents that can be used include hypochlorites such as sodium hypochlorite and calcium hypochlorite, and chlorinated isocyanuric acids such as trichloroisocyanuric acid and sodium dichloroisocyanurate. In another embodiment, sodium hypochlorite, which is a hypochlorite, or sodium dichloroisocyanurate, which is a chlorinated isocyanuric acid, can be used, and in yet another embodiment, sodium hypochlorite can be used. Note that, instead of chlorine agents, bromine agents (bromine-based disinfectants) such as 1-bromo-3-chloro-5,5-dimethylhydantoin can also be used as compounds that exert a sterilizing and disinfecting effect on the bath water W.

[0020] The bath agent of the embodiment contains a tar dye and an ammonium salt.

[0021] Tar dyes are synthetic dyes made from coal tar, petroleum tar, or naphtha. Bath additives containing tar dyes are used in bath water W at public baths and other facilities to color the bath water W, providing bathers with a sense of mental relaxation and enhancing the bathing experience. However, tar dyes are easily decomposed by chlorine in chlorine agents, and are easily bleached and change in color as a result. Therefore, bath water W colored with tar dyes is prone to color changes due to the presence of chlorine in chlorine agents.

[0022] Examples of tar dyes include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2, Red No. 201, Red No. 213, Red No. 227, Red No. 230 (1), Red No. 230 (2), Red No. 231, Red No. 232, Orange No. 205, Orange No. 207, Yellow No. 202 (1), and Yellow No. 202. (2), Yellow No. 203, Green No. 201, Green No. 204, Green No. 205, Blue No. 202, Blue No. 203, Blue No. 205, Brown No. 201, Red No. 401, Red No. 502, Red No. 503, Red No. 504, Red No. 506, Orange No. 402, Yellow No. 402, Yellow No. 403, (1), Yellow No. 406, Yellow No. 407, Green No. 401, Green No. 402, Purple No. 401, Black No. 401, etc. can be used.

[0023] Among tar dyes, those that have excellent coloring properties but are susceptible to color tone changes due to chlorine from chlorine agents include Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2, Orange No. 205, Yellow No. 202 (1), Green No. 201, Green No. 204, and Blue No. 205. Further examples include Red No. 2, Red No. 102, Yellow No. 4, Yellow No. 5, Green No. 3, and Blue No. 2. Even when these tar dyes are added as bath additives to bath water W to which a chlorine agent has been added, the inclusion of an ammonium salt in the bath additive can suppress color tone changes of these tar dyes.

[0024] Ammonium salts are compounds with the structure NH X "Y" is a general term for salts of Y-type nitrogen-containing compounds. The present inventors discovered that, when the combined chlorine concentration is in the range of 3 to 10 mg / L, the presence of the chlorine in the chlorine agent added to bath water W and the ammonium salt contained in the bath agent can suppress color changes in the tar dye added to bath water W and maintain the sterilizing and disinfecting effects of bath water W. The combined chlorine concentration refers to the concentration of chlorine in a chlorine compound formed when the chlorine in the chlorine agent reacts with other substances, such as ammonium salts. When an excess of ammonium salt is added relative to the chlorine agent, only combined chlorine is formed from the chlorine in the chlorine agent. Furthermore, ammonium salts do not liberate ammonia unless in a strongly alkaline environment (pH 10 or higher), so they do not emit an ammonia odor even at high concentrations.

[0025] Examples of ammonium salts that can be used include ammonium chloride, ammonium sulfate, triammonium phosphate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, ammonium nitrate, ammonium bromide, ammonium iodide, ammonium carbonate, ammonium hydrogen carbonate, ammonium oxalate, ammonium acetate, ammonium lactate, and ammonium citrate. In another embodiment, ammonium chloride or ammonium sulfate, which are excellent in chemical stability, can be used, and in yet another embodiment, ammonium sulfate can be used.

[0026] Furthermore, organic ammonium salts can also be used as the ammonium salt, and primary ammonium salts and secondary ammonium salts can be used as the organic ammonium salts. Note that primary ammonium salts are those in which one hydrogen atom of an ammonium ion is substituted with a carbon-containing group, and secondary ammonium salts are those in which two hydrogen atoms of an ammonium ion are substituted with carbon-containing groups.

[0027] Other ingredients such as inorganic salts, herbal medicines, and moisturizers may be added to the bath additive.

[0028] Inorganic salts are ingredients that enhance the warming and cleansing effects of bathing and also have the effect of softening the water. Inorganic salts that can be used, excluding ammonium salts, include sodium sulfate, magnesium sulfate, potassium aluminum sulfate (potassium alum), sodium chloride, potassium chloride, magnesium chloride, calcium carbonate, sodium carbonate, sodium bicarbonate, and sodium metasilicate.

[0029] Herbal medicines are ingredients that have the effect of enhancing the thermal effect of bathing. Examples of herbal medicines that can be used include fennel, Scutellaria root, spruce, cinnamon bark, magnolia bark, tangerine peel, chili pepper, mugwort, mint, Cnidium rhizome, Angelica acutiloba, ginger, sophora rhizome, licorice, Phellodendron bark, Salicylic acid fruit, and kaoka.

[0030] Moisturizers are ingredients that have the effect of moisturizing the skin. Examples of moisturizers that can be used include glycerin, propylene glycol, polyethylene glycol, dextrin, squalane, plant extracts (such as mugwort extract and seaweed extract), and plant oils (such as jojoba oil, olive oil, and rice bran oil).

[0031] Next, a method of using the bath additive of this embodiment will be described. FIG. 1 is a conceptual diagram of an example of a circulating bathtub 1 in which the bath additive of this embodiment is used. In the circulating bathtub 1, bath water W is kept clean by circulating through a purifying circulation pipe 20 during business hours at a public bath or the like, and is used without complete water replacement. Bath water W is supplied through a supply port 11 and drawn into the circulation pipe 20 from an intake port 12 of the bathtub 10 by the suction force of a pump 22. Hair and other impurities contained in the bath water W are removed by a hair collector 21. A chlorine agent is added from a chlorine injector 25. Fine contaminants contained in the bath water W are filtered by a filter 23. The bath water W is then heated to an appropriate temperature in a heat exchanger 24 and returned to the bathtub 10 through an outlet 13.

[0032] The bath agent containing the tar colorant and the ammonium salt is added directly to the bathtub 10 or from the hair collector 21.

[0033] The chlorine agent can be added so that the combined chlorine concentration of the bath water W is 3 to 10 mg / L. This is because the bath water W can be sufficiently sterilized and disinfected. If the combined chlorine concentration is less than 3 mg / L, the sterilizing and disinfecting effect of the bath water W may be insufficient. On the other hand, if the combined chlorine concentration exceeds 10 mg / L, the sterilizing and disinfecting effect of the bath water W may plateau, making it uneconomical, and the bath water W may have a chlorine smell. In another embodiment, the combined chlorine concentration of the bath water W may be 3 to 8 mg / L, and in yet another embodiment, it may be 3 to 6 mg / L.

[0034] The tar dye in the bath additive can be added in an amount of 0.05 to 4.0 mg / L relative to the bath water W. This is because the bath water W is moderately colored, providing the bather with a pleasant color and enhancing the bathing experience. If the amount of tar dye added is less than 0.05 mg / L, the color (coloring) of the bath water W may be light, which may not enhance the bathing experience for the bather. On the other hand, if the amount of tar dye added is more than 4.0 mg / L, the color (coloring) of the bath water W may be strong, which may cause the bather to feel uncomfortable and may not enhance the bathing experience. In another embodiment, the tar dye can be added in an amount of 0.1 to 3.0 mg / L relative to the bath water W, and in yet another embodiment, the tar dye can be added in an amount of 0.15 to 2.5 mg / L relative to the bath water W.

[0035] When the ammonium salt in the bath additive is ammonium sulfate, it can be added in an amount of 2.5 to 25 mg / L to the bath water W. This is because it is possible to suppress color changes in the tar dyes and thereby suppress color changes in the bath water W while maintaining the bactericidal and disinfecting effects of the bath water W. If the amount of ammonium salt added is less than 2.5 mg / L, the amount of combined chlorine formed by reaction with the chlorine agent will be insufficient, which may result in insufficient bactericidal and disinfecting effects in the bath water W and in failure to suppress color changes in the tar dyes. On the other hand, if the amount of ammonium salt added exceeds 25 mg / L, the effect of suppressing color changes in the tar dyes may plateau, making the addition uneconomical. In another embodiment, the amount of ammonium sulfate added as the ammonium salt can be 5 to 25 mg / L to the bath water W, and in yet another embodiment, it can be 7.5 to 25 mg / L to the bath water W. In addition, when the ammonium salt is ammonium chloride, it can be added in an amount of 2 to 20 mg / L to the bath water W, and in another embodiment, the amount of ammonium chloride added as the ammonium salt can be 4 to 20 mg / L to the bath water W, and in yet another embodiment, it can be 6 to 20 mg / L to the bath water W.

[0036] The bath additives of the present embodiment are used in the form of powder or tablets. The bath additives are used in public baths with circulating bathtubs 1 as shown in Fig. 1, and are added to bath water W so that the tar dye concentration is 0.05 to 4.0 mg / L, or 2.5 to 25 mg / L if the ammonium salt is ammonium sulfate. A chlorine agent is added to the bath water W for the circulating bathtub 1 so that the combined chlorine concentration is 3 to 10 mg / L.

[0037] According to the method for using the bath additive of this embodiment, bath water W is circulated in a circulating bathtub 1 and used, and the addition of a chlorine agent provides sterilizing and disinfecting effects. The bath additive added to the bath water W contains a tar dye and an ammonium salt, and the bath water W to which the bath additive has been added is colored by the tar dye. Due to the presence of chlorine from the chlorine agent and the ammonium salt contained in the bath additive, the bath water W can maintain its sterilizing and disinfecting effects while suppressing color changes in the dye, thereby suppressing color changes in the bath water W, at a combined chlorine concentration in the range of 3 to 10 mg / L. [Example]

[0038] The present invention will be described in more detail below with reference to examples. In the examples, the bath additives were used in a circulating bathtub 1, and the color retention of the bath water W was evaluated. The storage stability of the bath additives was also evaluated. These evaluation methods are described below.

[0039] <Bath water color retention> To measure color retention, a chlorine agent was added to bath water W containing bath additives, and the color difference between before and after 2 hours of adding the chlorine agent was measured. * 50 cm of hot water at 40°C was added to a bathtub 10 (temperature: 90°C or higher), and 100 g of the bath additive of the present invention was added to 1000 L of hot water. Sodium hypochlorite was added as a chlorine agent so that the combined chlorine concentration was 5 mg / L, and this was used as bath water W. The color difference was measured by taking a photograph of the bath water W from above the bathtub 10 before and two hours after the addition of the chlorine agent, and comparing the color of the printed photograph with the CIELAB (L * a *b * ) and the color difference between two colors (ΔE * =[(ΔL * ) 2 +(Δa * ) 2 +(Δb * ) 2 ] 1 / 2 ) was calculated. Then, the color difference (ΔE * ) is 20 or less, and the color difference (ΔE * ) is more than 20 and less than 25, it is △, color difference (ΔE * ) exceeding 25 was evaluated as ×.

[0040] <Storage stability of bath additives> Storage stability was evaluated by sealing 100g of bath additives in a 1L polyethylene container and storing them at 45℃ for 7 days, and evaluating any changes that occurred. The evaluation was then carried out with a ○ mark if no changes were observed, and an × mark if abnormalities such as deformation of the polyethylene container or the emission of an unpleasant odor were observed.

[0041] The ingredients of the bath agents of the test examples and the evaluation results thereof are shown in Table 1. Test examples 1 to 4 and 6 to 8 are working examples, and test example 5 is a comparative example.

[0042] [Table 1]

[0043] (Test Example 1) Test Example 1 is a bath additive that uses ammonium sulfate as the ammonium salt, Red No. 2 and Yellow No. 5 as tar dyes, and sodium sulfate as the inorganic salt. All of the bath additives in the test examples contain added fragrance, dextrin (a moisturizing agent), and silica. The bath additive in Test Example 1 has a color difference (ΔE * ) was 20 or less, and the bath water had excellent color retention and storage stability.

[0044] (Test Example 2) Test Example 2 is a bath additive that uses ammonium chloride as the ammonium salt, Red No. 102, Yellow No. 5, and Blue No. 2 as tar dyes, and sodium sulfate and sodium chloride as inorganic salts. The bath additive of Test Example 2 was used to measure the color difference (ΔE * ) was 20 or less, and the bath water had excellent color retention and storage stability.

[0045] (Test Example 3) Test Example 3 is a bath additive that uses ammonium sulfate as the ammonium salt, Yellow No. 4 and Blue No. 1 as tar dyes, and sodium sulfate and sodium chloride as inorganic salts. The bath additive of Test Example 3 was used to measure the color difference (ΔE * ) was 20 or less, and the bath water had excellent color retention and storage stability.

[0046] (Test Example 4) Test Example 4 is a bath additive that uses ammonium chloride as the ammonium salt, Yellow No. 4 and Yellow No. 5 as the tar dyes, and sodium sulfate and sodium chloride as the inorganic salts. The bath additive of Test Example 4 was used to measure the color difference (ΔE * ) was 20 or less, and the bath water had excellent color retention and storage stability.

[0047] (Test Example 5) Test Example 5 is a bath additive that does not contain ammonium salts. Test Example 5 is a bath additive that uses Red No. 2 and Yellow No. 5 as tar dyes and sodium sulfate as inorganic salts. The bath additive of Test Example 5 does not contain ammonium salts and does not generate combined chlorine, so the color difference (ΔE * ) exceeded 25, and obvious discoloration was observed, indicating that the bath water had poor color retention.

[0048] (Test Example 6) Test Example 6 is a bath additive that uses ammonium chloride as the ammonium salt, Red No. 102, Yellow No. 5, and Blue No. 2 as tar dyes, and sodium sulfate and sodium chloride as inorganic salts. The bath additive in Test Example 6 contained a small amount of ammonium salt, and the generation of combined chlorine was insufficient. Therefore, the color difference (ΔE * ) was greater than 20 and less than 25, and slight discoloration was observed, indicating that the color retention of the bath water was somewhat poor.

[0049] (Test Example 7) Test Example 7 is a bath additive that uses ammonium sulfate as the ammonium salt, Yellow No. 4 and Blue No. 1 as tar dyes, and sodium sulfate and sodium bicarbonate as inorganic salts. The bath additive of Test Example 7 was used to measure the color difference (ΔE * ) was 20 or less, and although the color retention of the bath water was excellent, the ammonium sulfate and sodium bicarbonate reacted and decomposed, resulting in a lack of storage stability. Note that the storage stability of the bath agent in Test Example 7 can be improved by packaging the ammonium sulfate and sodium bicarbonate separately as a two-component bath agent.

[0050] (Test Example 8) Test Example 8 is a bath additive that uses ammonium carbonate as the ammonium salt, Yellow No. 4 and Yellow No. 5 as the tar dyes, and sodium sulfate as the inorganic salt. The bath additive of Test Example 8 was used to measure the color difference (ΔE * ) was 20 or less, and the color retention of bath water was excellent, but the storage stability was poor due to the decomposition of ammonium carbonate. [Explanation of symbols]

[0051] 1. Circulating bathtub 10 Bathtub 11 Supply port 12 Intake port 13 Outlet 20 Circulation piping 21 Hair collector 22 Pump 23 Filter 24 Heat exchanger 25 Chlorine injection equipment W Bath water

Claims

1. A method for using a bath additive added to bath water in a bathtub, comprising: The bathtub is a circulating bathtub in which the bath water is circulated and used, The bath agent contains a tar colorant and an ammonium salt and is added to the bath water, The bath water contains a chlorine agent for sterilization and disinfection, and has a combined chlorine concentration of 3 to 10 mg / L. A method for using a bath additive.

2. 2. The method for using the bath additive according to claim 1, wherein the tar dye is one or more selected from Red No. 2, Red No. 3, Red No. 102, Red No. 104 (1), Red No. 105 (1), Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue No. 2, Orange No. 205, Yellow No. 202 (1), Green No. 201, Green No. 204, and Blue No.

205.

3. 2. The method for using the bath additive according to claim 1, wherein the tar dye is one or more selected from Red No. 2, Red No. 102, Yellow No. 4, Yellow No. 5, Green No. 3, and Blue No.

2.

4. 2. The method for using the bath agent according to claim 1, wherein the ammonium salt is ammonium sulfate or ammonium chloride.

5. 2. The method for using the bath agent according to claim 1, wherein the chlorine agent is sodium hypochlorite or sodium dichloroisocyanurate.

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