WO2017018194A1

WO2017018194A1 - Solid effervescent bathing product

Info

Publication number: WO2017018194A1
Application number: PCT/JP2016/070490
Authority: WO
Inventors: 靖博志田原; 智海石井
Original assignee: 花王株式会社
Priority date: 2015-07-30
Filing date: 2016-07-12
Publication date: 2017-02-02
Also published as: TW201707679A; CN107735071B; CN107735071A; TWI702054B; JP2017031072A; JP6640481B2

Abstract

Provided is a solid effervescent bathing product which is effectively prevented from sticking to a tableting pestle during production and, when put into bath water before using in such a manner that the solid effervescent bathing product is directly in contact with the legs or palms of a user, which can provide a sufficient warm sensation to the user. The solid effervescent bathing product according to the present invention comprises (A) 20-50 mass% inclusive of carbonate(s) containing 15-100 mass% inclusive of sodium hydrogen carbonate, (B) an organic acid, and (C) an inorganic compound which generates 150-500 cal/g inclusive of heat when dissolved in water, wherein the ratio by mass of component (C) to sodium hydrogen carbonate [(C)/sodium hydrogen carbonate] is 0.6-7.0 inclusive.

Description

Solid foaming bath agent

The present invention relates to a solid foaming bath agent.

Traditionally, bath preparations containing carbonates and organic acids generate carbon dioxide bubbles in the bath water, and this carbon dioxide gas can provide a blood circulation promoting effect, a heat retaining effect, and enjoy a feeling of foaming. It is widely known as an excellent bath agent, and further, those having various performances have been developed.

For example, Patent Document 1 discloses a bath agent in which a carbonate and an organic acid are combined with silver hydroxycarboxylate, and can suppress the propagation of various bacteria while generating carbon dioxide gas when used. Patent Document 2 discloses a footbath that uses a specific amount of a carbonate and / or bicarbonate and an organic acid, and a hygroscopic agent such as sodium sulfate in a specific amount. According to such a footbath, It is possible to prevent the release of carbon dioxide during storage, reduce the volatilization of carbon dioxide on the surface of the bath water, and ensure the concentration of carbon dioxide in the bath water.

Furthermore, Patent Document 3 discloses a composition for heating containing an inorganic salt or zeolite having a specific value for the standard dissolution enthalpy in water, carbonate, and fumaric acid as a heat generating material that generates heat by a hydration reaction. It can be applied to a wide range of dosage forms such as creams, packs, powders, etc., and a thermal effect can be obtained by applying or adhering it to the body.

On the other hand, Patent Document 4 discloses a tablet-type effervescent bath agent having a three-layer structure containing an acid and a carbonate, which occurs when tableting is performed by mixing an acid and a carbonate. We are trying to prevent the trouble of tableting (sticking).

(Patent Document 1) JP 2010-37264 (Patent Document 2) JP 2005-200350 (Patent Document 3) JP 11-318967 (Patent Document 4) JP 03-74321

The present invention includes the following components (A) to (C):
(A) Carbonate containing 15% by mass or more and 100% by mass or less of sodium bicarbonate 20% by mass
50% by mass or less (B) Organic acid (C) An inorganic compound having a calorific value of 150 cal / g or more and 500 cal / g or less when 1.0 g is dissolved in water, and component (C) for sodium hydrogen carbonate The mass ratio ((C) / sodium bicarbonate) of the solid foamable bath agent is 0.6 or more and 7 or less.
The present invention also includes the following components (A) to (C):
(A) Carbonate containing 15% by mass or more and 100% by mass or less of sodium hydrogen carbonate 20% by mass or more and 50% by mass or less (B) Organic acid (C) The calorific value when 1.0 g is dissolved in water is 150 cal / g Containing an inorganic compound of 500 cal / g or less, the mass ratio of component (C) to sodium bicarbonate ((C) / sodium bicarbonate) being 0.6 or more and 7.0 or less, and at least in the bath water The present invention relates to a solid foaming bath agent for use in contact with the skin of a part of the body.

For example, when bathing water is used so that the surface of the bath agent is in direct contact with the skin of the foot or hand, the agents described in Patent Documents 1 and 2 cannot fully realize the thermal effect, and patents In the composition described in Document 3, even if it is attempted to be molded into a solid state, there is a possibility that adhesion to a tableting punch or a mold cannot be prevented due to insufficient releasability. Furthermore, even the agent described in Patent Document 4 requires a specific process for obtaining a three-layered agent, and still has room for improvement as an agent that directly provides sufficient thermal effect to the skin in bath water. There is.

Therefore, the present invention effectively suppresses adhesion to the tablet punch and mold during production, and in use, when used in direct contact with skin such as feet and hands in bath water, The present invention relates to a solid foaming bath agent capable of realizing a sufficient thermal effect.

Therefore, the present inventors have made various studies and found that using sodium hydrogen carbonate as the carbonate can effectively prevent adhesion to the tablet punch and mold, but it is difficult to have a high thermal effect. Met. Therefore, by further study, using a specific inorganic compound at a specific mass ratio with respect to sodium hydrogen carbonate while using a specific amount of carbonate containing a specific amount of sodium hydrogen carbonate and an organic acid, It was found that a solid foaming bath agent capable of effectively suppressing adhesion to a metal mold and exhibiting a high thermal effect can be obtained.

According to the solid foaming bath agent of the present invention, it is possible to effectively suppress adhesion to the tablet punch and mold during production without giving a special layer structure, It is possible to improve productivity. In addition, in bathing water at the time of use, it can exert a sufficient thermal effect, so it can be used by directly touching the skin of a part of the body such as feet and hands while enjoying a good foaming feeling. When you do, you can feel a comfortable thermal effect.

Detailed Description of the Invention

Hereinafter, the present invention will be described in detail.
The solid foamable bath agent of the present invention contains 20% by mass or more and 50% by mass or less of carbonate as the component (A), and the carbonate contains 15% by mass or more and 100% by mass or less of sodium bicarbonate. Thus, when the carbonate is contained in an amount of 20% by mass or more and 50% by mass or less, when the solid foaming bath agent of the present invention is used in bath water, the organic acid of the component (B) described later is used. In addition, the amount of carbon dioxide gas generated can be secured to provide a good foaming feeling, and a good warming feeling can be imparted to the skin by exhibiting an excellent blood circulation promoting effect. Then, by containing 15% by mass or more and 100% by mass or less of sodium hydrogen carbonate, which is highly useful as a component for suppressing adhesion of the bath preparation to the tablet punch or mold, When producing the foaming bath agent, the releasability between the bath agent and the tableting punch or mold can be improved, and unnecessary adhesion to the tableting punch or mold can be effectively suppressed.

The content of sodium hydrogen carbonate is 15% by mass or more in the carbonate of the component (A) from the viewpoint of effectively suppressing the adhesiveness of the bath preparation to the tablet punch and mold during production, Preferably it is 25 mass% or more, More preferably, it is 35 mass% or more. Further, the content of sodium hydrogen carbonate is 100% by mass or less, preferably 85% by mass or less, in the carbonate of the component (A) from the viewpoint of securing a high thermal effect in the bath water during use. Yes, more preferably 70% by mass or less. The content of sodium hydrogen carbonate is 15% by mass or more and 100% by mass or less, preferably 25 to 85% by mass, more preferably 35 to 70% by mass in the carbonate of component (A). It is.
Further, the content of sodium hydrogen carbonate is 3% by mass or more in the solid foamable bath agent from the viewpoint of effectively suppressing the adhesiveness of the bath agent to the tableting punch and mold during production. More preferably, it is 8 mass% or more, More preferably, it is 13 mass% or more. Further, the content of sodium hydrogen carbonate is preferably 50% by mass or less, more preferably 40% by mass or less, in the solid foamable bath agent from the viewpoint of securing a high thermal effect in the bath water during use. More preferably, it is 30 mass% or less. The content of sodium hydrogen carbonate is preferably 3 to 50% by mass or less, more preferably 8 to 40% by mass, and further preferably 13 to 30% by mass in the solid foamable bath agent. is there.

The carbonate of the component (A) can contain one or more selected from sodium carbonate, magnesium carbonate, potassium carbonate, and calcium carbonate in addition to the sodium hydrogen carbonate. Among these, from the viewpoint of ensuring a high thermal effect in the bath water during use, one or two selected from sodium carbonate and calcium carbonate are preferable, and sodium carbonate is more preferable.
The sodium hydrogen carbonate contained in the component (A) is, for example, a component having a high endothermic property (dissolution enthalpy: +54) as compared with the exothermic component (dissolution enthalpy: −60.0 cal / g) of sodium carbonate. .2 cal / g), the thermal effect in the bath water during use generally tends to be reduced. However, in the solid foaming bath agent of the present invention, both the components described below and their contents and specific mass ratio are used. In combination, it is possible to exert an excellent thermal effect.

The content of the component (A) is combined with the organic acid of the component (B) described later to secure a carbon dioxide gas generation amount, and from the viewpoint of imparting a good foaming feeling during use, for the solid foamable bath of the present invention. In an agent, it is 20 mass% or more, Preferably it is 25 mass% or more, More preferably, it is 30 mass% or more. Further, the content of the component (A) is 50% by mass or less, preferably 45% by mass or less, in the solid foamable bath agent of the present invention, from the viewpoint of maintaining good storage stability. More preferably, it is 40 mass% or less. The content of the component in the solid foamable bath agent of the present invention is 20% by mass or more and 50% by mass or less, preferably 25 to 45% by mass, more preferably 30 to 40% by mass. It is.

The solid foaming bath agent of the present invention contains an organic acid as component (B). As this component (B), one or two kinds selected from fumaric acid, citric acid, malic acid, tartaric acid, succinic acid, maleic acid, phthalic acid, glutaric acid, adipic acid, benzoic acid, salicylic acid, and oxalic acid The above is mentioned. Among these, from the viewpoint of ensuring a high thermal effect in the bath water during use, one or more selected from fumaric acid, citric acid, malic acid, tartaric acid, and succinic acid are preferable, fumaric acid, citric acid, One or more selected from malic acid and tartaric acid are more preferable.

Almost all organic acids are endothermic components, but in selecting the component (B) for use in the solid foamable bath agent of the present invention, a viewpoint of exerting an excellent thermal effect during use. Therefore, the value of the enthalpy of dissolution of these organic acids can be used as an index, and it is preferable to select one having a small value. When obtaining a specific value of dissolution enthalpy, a value obtained by measuring a heat balance when each organic acid is dissolved in water under the same conditions may be used as an index.

The content of the component (B) is preferably 20% by mass or more in the solid foamable bath agent of the present invention from the viewpoint of enhancing the thermal effect in the bath water during use while securing the amount of carbon dioxide generated. Yes, more preferably 25% by mass or more, still more preferably 30% by mass or more. The content of the component (B) is preferably 50% by mass or less, more preferably 45% by mass or less in the solid foamable bath agent of the present invention from the viewpoint of maintaining good storage stability. More preferably, it is 40 mass% or less. The content of component (B) is preferably 20 to 50% by mass, more preferably 25 to 45% by mass, and further preferably 30 to 40% by mass in the solid foamable bath agent of the present invention. % By mass.

In the solid foamable bath agent of the present invention, the ratio (X / Y) of the alkali molar equivalent X of the component (A) to the acid molar equivalent Y of the component (B) effectively secures the amount of carbon dioxide generated. From the viewpoint that a sufficient amount of carbon dioxide gas can be dissolved in the bath water to enjoy the blood flow promoting effect of carbon dioxide gas during use while improving the foaming feeling during use, preferably 0.7 or more More preferably, it is 0.75 or more, More preferably, it is 0.8 or more. From the same viewpoint, the ratio (X / Y) of the alkali molar equivalent X of the component (A) to the acid molar equivalent Y of the component (B) is preferably 1 or less, more preferably 0.97 or less. More preferably, it is 0.95 or less. The ratio (X / Y) of the alkali molar equivalent X of the component (A) to the acid molar equivalent Y of the component (B) is preferably 0.7 to 1, more preferably 0.75 to 0.00. 97, more preferably 0.8 to 0.95.
The alkali molar equivalent X of component (A) is calculated from {content of component (A) × alkali valence of component (A)} / {molecular weight of component (A)}. When a plurality of types of carbonate are included, X is the total number of alkali molar equivalents determined for each component. Similarly, the acid molar equivalent Y of component (B) is also calculated from {content of component (B) × acid number of component (B)} / {molecular weight of component (B)}.

The solid foamable bath agent of the present invention contains an inorganic compound having a calorific value of 150 cal / g or more and 500 cal / g or less as a component (C) when 1.0 g is dissolved in water. The mass ratio of component (C) ((C) / sodium bicarbonate) is 0.6 or more and 7 or less. As described above, the solid foamable bathing agent of the present invention is a specific amount of sodium hydrogen carbonate that is highly useful as a component that suppresses the adhesiveness of the bathing agent to the tablet punch and mold in the component (A). Although included, such sodium bicarbonate is a component that is not suitable for enhancing the thermal effect in bath water during use because its dissolution enthalpy is +54.2 cal / g, that is, it is a highly endothermic component. is there. However, in the present invention, the amount of heat generated when 1.0 g of the inorganic compound (C) is dissolved in water is 150 cal / g or more and 500 cal / g or less, that is, it is a highly exothermic component. Therefore, by using such a component in the above-mentioned mass ratio with respect to sodium bicarbonate, the effect of suppressing adhesion to a tableting punch or a mold at the time of manufacture, which could not be realized by a conventional bath preparation, and at the time of use This is due to the fact that it was possible to achieve both excellent thermal effects.

In addition, since the inorganic compound of component (C) is more exothermic than, for example, an inorganic salt such as sodium sulfate, it is possible to effectively improve the thermal effect during use, and calcium chloride, magnesium chloride, etc. Since it is not necessary to worry about the generation of a characteristic odor or precipitation of insoluble matter compared to the inorganic salt, good usability can be ensured.

Specific examples of the inorganic compound (C) include anhydrous magnesium sulfate (MgSO ₄ : dissolution enthalpy: −180.4 cal / g, anhydrous aluminum sulfate (Al ₂ (SO ₄ ) ₃ ), anhydrous calcium sulfate (CaSO ₄ ) and other sulfates, anhydrous calcium chloride (CaCl ₂ ), anhydrous magnesium chloride (MgCl ₂ ), anhydrous aluminum chloride (AlCl ₃ ) and other chlorides, and one or more selected from calcium oxide .
Among these, from the viewpoint of high heat generation and safety, and from the viewpoint of suppressing the base odor, one or two kinds selected from anhydrous calcium chloride and anhydrous magnesium sulfate are preferable, and from the viewpoint of preventing undissolved residue, Anhydrous magnesium sulfate is more preferred.

The mass ratio of the component (C) to the sodium hydrogen carbonate contained in the component (A) ((C) / sodium hydrogen carbonate) is 0.6 or more from the viewpoint of ensuring a good thermal effect during use. Thus, it is preferably 1.0 or more, more preferably 1.1 or more. In addition, the mass ratio of component (C) to sodium bicarbonate ((C) / sodium bicarbonate) is 7.0 or less from the viewpoint of favorably securing the effect of suppressing adhesion to tableting punches and molds during production. It is preferably 2.5 or less, and more preferably 1.7 or less. The mass ratio of component (C) to sodium hydrogen carbonate ((C) / sodium hydrogen carbonate) is 0.6 or more and 7.0 or less, preferably 1.0 to 2.5, and more preferably. Is 1.1 to 1.7.

The content of the component (C) is preferably 10% by mass or more, more preferably 15% by mass in the solid foamable bath agent of the present invention, from the viewpoint of ensuring excellent thermal effects during use. % Or more, more preferably 18% by mass or more. In addition, the content of the component (C) is preferably from the viewpoint of ensuring a good anti-adhesion effect on the tableting punch and mold during production, and from the viewpoint of ensuring an excellent thermal effect during use. It is 40 mass% or less, More preferably, it is 30 mass% or less, More preferably, it is 25 mass% or less. The content of component (C) is preferably 10 to 40% by mass, more preferably 15 to 30% by mass, and still more preferably 18 to 25% by mass.

The solid foaming bath agent of the present invention combines the effect of suppressing the adhesion to tableting dies and molds and the high thermal effect during use, the effect of ensuring a sufficient amount of carbonic acid foaming, and the generation of odors and insoluble matter. An inorganic salt other than the component (A) and the component (C) can be contained within a range that does not impair the effect of preventing the precipitation and securing a good feeling of use. Examples of such inorganic salts include one or more selected from sodium sulfate, calcium chloride, and magnesium chloride.

The content of the inorganic salt other than the component (A) and the component (C) is preferably 30% by mass or less, more preferably 15% by mass or less in the solid foamable bath agent of the present invention. Or it is preferable not to contain inorganic salts other than a component (A) and a component (C) except the case where it mixes unavoidable.

In addition, the solid foamable bath agent of the present invention preferably restricts the content of sorbitol from the viewpoint of satisfactorily maintaining the effect of suppressing the adhesion to tablet punches and molds. The content of the sorbitol is preferably 7.5% by mass or less, more preferably 5% by mass or less, and further preferably 3.0% by mass or less in the solid foaming bath agent of the present invention. Yes, or the solid foamable bath agent of the present invention preferably contains no sorbitol.

The solid foamable bathing agent of the present invention is a component other than the above-mentioned components, which is usually used in bathing agents, such as nonionic surfactants; water-soluble polymers; saccharides; crystalline silica, amorphous silica. Water-insoluble excipients such as amorphous aluminosilicates; oily components such as fatty acid esters and glycerides, higher fatty acids and higher alcohols; CGRP response promoters such as carrots, asunalo, cucumbers, birch and their extracts; vitamins Proteolytic enzymes; bactericidal preservatives; fragrances; pigments and the like may be appropriately contained.

The solid effervescent bath agent of the present invention is obtained by mixing the above ingredients and then molding into a solid form according to a conventional method, and does not require a special process, and is attached to a tablet punch or a mold. Is effectively suppressed. As a specific form, a tablet-like tablet or a briquette-like tablet is mentioned, and powdery and granular tablets are not included. In the case of a tablet tablet, it is molded by a rotary tableting machine, a hydraulic tableting machine, an eccentric tableting machine or the like, and in the case of a briquette tablet, it is molded by a briquetting machine, a compacting machine or the like. In particular, tablet preparations and compression granulation preparations (for example, briquette tablets) are preferable. Here, the “briquette tablet” refers to a tablet having a major diameter of 3 to 25 mm.

The mass per one solid foamable bath agent of the present invention (g / 1) may vary depending on the mode of bathing, but is preferably 30 to 60 (g / 1), more preferably 35. 55 (g / 1 piece). The calorific value per 100 g of the solid foamable bath agent of the present invention (cal / 100 g) is preferably 1000 to 5000 cal / 100 g, more preferably 1300 to 5000 from the viewpoint of providing a comfortable thermal effect during use. 4000 cal / 100 g, more preferably 2000 to 3200 cal / 100 g.
The calorific value per 100 g of the solid foamable bath agent of the present invention can be calculated based on the mass ratio of each component in the bath agent and the value of the dissolution enthalpy per 100 g of each of the above components.

The tablet strength (kgf) of the solid effervescent bath preparation of the present invention is preferably 5 kgf or more, more preferably 7 kgf or more, more preferably 9 kgf from the viewpoint of preventing the tablet from cracking or chipping during transportation. More preferably, it is the above. Further, from the viewpoint of increasing the dissolution rate of the solid foaming bath agent in the bath water, it is preferably 21 kgf or less, more preferably 18 kgf or less, and even more preferably 15 kgf or less. When measuring the tablet strength, if the tablet has a corner such as a rectangle, the tablet is placed at a point 5 mm from the top of any corner toward the center of the tablet, and when the tablet has a corner, the tablet is horizontal. The center of the pin of the hardness meter is applied to a point of 5 mm from the end toward the center on the line of the tablet corresponding to the maximum delivery length on the projection surface, and a load is applied for measurement.

The solid foaming bath agent of the present invention is used by putting it in bath water and immersing at least a part of the body in the bath water. The mode of bathing is not particularly limited, and may be a whole body bath that immerses the entire body, or a partial bath that immerses only a part of the body such as a foot, hand, arm, neck, or shoulder. Good. In particular, from the viewpoint of fully enjoying the excellent thermal effect during use, providing a pleasant thermal effect directly on the skin, and realizing a comfortable foaming feeling, this is applied to at least part of the body skin in bath water. It is preferable to use the solid foaming bath agent of the invention in contact, and in this case, specifically, it is more preferable that the body part is a foot, an arm or a hand, and the sole is a foot. Further preferred. More specifically, for example, the solid foaming bath agent of the present invention may be disposed at the bottom of a bathtub to which bath water is supplied, and a part of the body may be in contact with the surface of the bath agent. For example, a body part such as a foot may be placed from the upper surface of the placed bath agent so that the skin of the body part directly touches the bath agent.

The temperature of the bath water into which the solid foamable bath agent of the present invention is charged is preferably 30 to 45 ° C., more preferably 35 to 43 ° C., and still more preferably from the viewpoint of sufficiently enjoying the thermal effect. 38-43 ° C. The immersion time is preferably 1 minute or more in a bath water of 30 to 45 ° C., more preferably 3 minutes or more, still more preferably 5 minutes or more, and preferably 1 to a bath water of 35 to 43 ° C. Min. Or more, more preferably 3 min. Or more, further preferably 5 min. Or more, or 1 min. Or more in bath water at 38 to 43 ° C., preferably 3 min. Or more, more preferably 5 min. More than a minute.

In particular, when the solid foamable bath agent of the present invention is used in contact with the skin of the sole, that is, when the solid foamable bath agent of the present invention is used as a footbath, the solid foamable bath of the present invention is used. The amount of the agent added to the bath water is preferably 3 g or more, preferably 4.5 g or more, with respect to 1 L of the bath water from the viewpoint of dissolving a sufficient amount of carbon dioxide gas in the bath water and providing a good thermal feeling. More preferably, it is 6 g or more. Further, when the solid foaming bath agent of the present invention is used as a foot bath agent, the amount of the solid foaming bath agent of the present invention to be added to the bath water is when carbon dioxide gas is effectively used and the hot water temperature is raised. From the viewpoint of suppressing burns, the amount is preferably 140 g or less, more preferably 70 g or less, still more preferably 50 g or less, and even more preferably 25 g or less with respect to 1 L of bath water.

And when using the solid foaming bath agent of the present invention as a foot bath agent, it is preferable to raise the temperature of the bath water. Specifically, the temperature rise of the bath water is preferably 0.1 ° C. or more. From the viewpoint of providing a good thermal feeling, it is preferably 0.15 ° C. or higher, more preferably 0.2 ° C. or higher. Further, when the solid foam bath agent of the present invention is used as a foot bath agent, the temperature rise of the bath water is preferably 1.5 ° C. or less, more preferably from the viewpoint of suppressing burns due to an increase in hot water temperature. Is 1.3 ° C. or lower, more preferably 1.0 ° C. or lower.

The following tablet-type effervescent bath agent is further disclosed in relation to the above-described embodiment of the present invention.
[1] The following components (A) to (C):
(A) Carbonate containing 15% by mass or more and 100% by mass or less of sodium hydrogen carbonate 20% by mass or more and 50% by mass or less (B) Organic acid (C) The calorific value when 1.0 g is dissolved in water is 150 cal / g A solid foaming bath agent containing an inorganic compound of 500 cal / g or less and having a mass ratio of component (C) to sodium bicarbonate ((C) / sodium bicarbonate) of 0.6 to 7.0 .
[2] The following components (A) to (C):
(A) Carbonate containing 15% by mass or more and 100% by mass or less of sodium hydrogen carbonate 20% by mass or more and 50% by mass or less (B) Organic acid (C) The calorific value when 1.0 g is dissolved in water is 150 cal / g Containing an inorganic compound of 500 cal / g or less, the mass ratio of component (C) to sodium bicarbonate ((C) / sodium bicarbonate) being 0.6 or more and 7.0 or less, and at least in the bath water A solid foaming bath agent for use in contact with the skin of a part of the body.
[3] The solid foaming bath agent according to [2], wherein the body part is a foot, arm, or hand.
[4] The content of sodium hydrogen carbonate in the component (A) is preferably 25% by mass or more, more preferably 35% by mass or more, preferably 85% by mass or less, more preferably 70%. The solid foamable bath agent according to any one of the above [1] to [3], which is not more than mass%.
[5] The solid foamable bath agent according to any one of the above [1] to [4], wherein the component (A) comprises one or more selected from sodium carbonate, magnesium carbonate, potassium carbonate, and calcium carbonate .
[6] The content of the component (A) is preferably 25% by mass or more, more preferably 30% by mass or more, preferably 45% by mass or less, and more preferably 40% by mass or less. [1] to [5] The solid foaming bath agent according to any one of [1] to [5].

[7] One or two components (B) selected from fumaric acid, citric acid, malic acid, tartaric acid, succinic acid, maleic acid, phthalic acid, glutaric acid, adipic acid, benzoic acid, salicylic acid, and oxalic acid More than one species, preferably one or more selected from fumaric acid, citric acid, malic acid, tartaric acid, and succinic acid, more preferably selected from fumaric acid, citric acid, malic acid, and tartaric acid The solid foaming bath agent according to any one of the above [1] to [6], which is one kind or two or more kinds.
[8] The content of component (B) is preferably 20% by mass or more, more preferably 25% by mass or more, still more preferably 30% by mass or more, and preferably 50% by mass or less. The solid foamable bath agent according to any one of the above [1] to [7], which is more preferably 45% by mass or less, and further preferably 40% by mass or less.
[9] The ratio (X / Y) of the alkali molar equivalent X of the component (A) to the acid molar equivalent Y of the component (B) is preferably 0.7 or more, more preferably 0.75 or more, More preferably, it is 0.8 or more, preferably 1 or less, more preferably 0.97 or less, and further preferably 0.95 or less, in any one of the above [1] to [8] solid forms Effervescent bath agent.

[10] The mass ratio ((C) / sodium bicarbonate) of component (C) to sodium bicarbonate contained in component (A) is preferably 1.0 or more, more preferably 1.1 or more. The solid foamable bath agent according to any one of the above [1] to [9], which is preferably 2.5 or less, more preferably 1.7 or less.
[11] One or two components (C) preferably selected from anhydrous magnesium sulfate, anhydrous aluminum sulfate, anhydrous calcium sulfate, anhydrous calcium chloride, anhydrous magnesium chloride, anhydrous aluminum chloride (AlCl ₃ ), and calcium oxide More preferably, it is one or two selected from anhydrous calcium chloride and anhydrous magnesium sulfate, and more preferably anhydrous magnesium sulfate, any one of the above-mentioned [1] to [10] solid foaming properties Bath agent.
[12] The content of component (C) is preferably 10% by mass or more, more preferably 15% by mass or more, still more preferably 18% by mass or more, and preferably 40% by mass or less, The solid foamable bath agent according to any one of [1] to [11], which is more preferably 30% by mass or more, and further preferably 25% by mass or more.
[13] The content of the inorganic salt other than the component (A) and the component (C) is preferably 30% by mass or less, more preferably 15% by mass or less in the tablet-type foaming bath agent of the present invention. The solid foamable bath agent according to any one of the above [1] to [12], which is present or preferably contains no inorganic salt other than the components (A) and (C).
[14] The content of sorbitol is preferably 7.5% by mass or less, more preferably 5% by mass or less, still more preferably 3.0% by mass or less, or the above [1] containing no sorbitol. ] To [13] The solid foamable bath agent.

[15] The solid foamable bath agent according to any one of the above [1] to [14], wherein the form is a tablet tablet or a briquette tablet.
[16] The calorific value per 100 g (cal / 100 g) is preferably 1000 to 5000 cal / 100 g, more preferably 1300 to 4000 cal / 100 g, and further preferably 2000 to 3200 cal / 100 g [1] [15] Any one of the solid foamable bath agents.
[17] The tablet strength is preferably 5 kgf or more, more preferably 7 kgf or more, further preferably 9 kgf or more, preferably 21 kgf or less, more preferably 18 kgf or less, more preferably 15 kgf or less. The solid foamable bath agent according to any one of the above [1] to [16].

[18] The solid foamable bath agent according to any one of the above [1] to [17], which is used in contact with at least a part of the skin in bath water.
[19] The solid foamable bath agent according to [18], wherein a part of the body is a foot, arm, or hand, preferably the sole.
[20] Use of the solid foamable bath agent according to any one of the above [1] to [19], which is used by being poured into bath water and in contact with at least a part of the skin of the body.
[21] The above-mentioned [20], wherein the tablet-type foaming bath agent of the present invention is placed at the bottom of a bathtub to which bath water is supplied, and a part of the body such as a foot is placed on the top of the placed bath agent. Use of a solid foaming bath agent.
[22] Use of the solid foaming bath agent according to the above [20] or [21], wherein the body part is a foot, arm or hand, preferably the sole.
[23] The solid foaming bath agent according to any one of [1] to [19] above is poured into bath water, and at least a part of the body is immersed in the bath water, so that at least a part of the body in the bath water. A bathing method in which a solid foaming bath agent is brought into contact with the skin of the skin.

Hereinafter, the present invention will be specifically described based on examples. In addition, unless otherwise indicated in a table | surface, content of each component shows the mass%.

[Examples 1 to 16, Comparative Examples 1 to 8]
According to the prescription shown in Table 1, 45 g of one tablet and a regular octagonal tablet with a diagonal length of 60 mm were produced using a rotary tableting machine.
The obtained tablet was placed at the bottom of a bath with 6 L of bath water at 40 ° C., and then the foot was put on the top of the tablet so that the skin and the tablet surface were in direct contact with each other, and the foot bath was performed for 10 minutes. . Each measurement and evaluation was performed according to the following method.
In addition, the calorific value (cal / 100g) of the obtained tablet was calculated based on the content of each component in 100g of the tablet and the value of dissolution enthalpy of each component as described above.
The results are shown in Table 1.

<Tablet strength>
The strength of each tablet was measured using a hardness measuring machine (model number 02040001) manufactured by Kiyama Seisakusho. The load when the tablet breaks when a load is applied so that the center of the pin of the hardness meter (stainless steel, tip diameter is 5 mm) hits the 5 mm portion from the top of any corner of the tablet toward the center of the tablet Was the tablet strength. Two tablets were measured and the average value was used as the evaluation value. The unit is expressed in kgf.
In addition, when the strength of the tablet was 21 kgf or more which is the detection limit of the hardness measuring machine, the measurement was impossible.

《Adhesion to tablet punches》
The degree of tableting failure (unevenness transferred to the tablet surface) caused by unevenness due to the adhesion of the tablet components to the tableting punch at the time of production was evaluated visually according to the following criteria.
0: Large amount of adhesion to the tablet punch and transfer (printing) occurred on 20% or more of the tablet surface 1: Slightly much adhesion to the tablet punch and transferred to 10% or more but less than 20% of the tablet surface ( 2: Printing did not occur, and adhesion to the tablet punch was not confirmed, and the transfer on the tablet surface was less than 10% and there was no problem

《Heat effect on feet》
When the foot bath was performed, the thermal sensation felt on the skin of the sole was evaluated according to the following criteria. An evaluation of “2” indicates that a good thermal effect can be obtained, and an evaluation of “3” indicates that a further excellent thermal effect can be obtained.
0: I felt cold 1: I didn't feel cold or warm 2: I felt a little warm 3: I felt a good warmth and were comfortable 4: I felt a little warmer 5: Very warm Felt

<Foaming feeling>
When the foot bath was performed, the feeling of foaming felt on the skin of the sole was evaluated according to the following criteria.
0: The foaming feeling was weak or did not feel the foaming feeling 1: The foaming feeling was felt moderately 2: The strong foaming feeling was obtained and comfortable

Claims

The following components (A) to (C):
(A) Carbonate containing 15% by mass or more and 100% by mass or less of sodium hydrogen carbonate 20% by mass or more and 50% by mass or less (B) Organic acid (C) The calorific value when 1.0 g is dissolved in water is 150 cal / g A solid foaming bath agent containing an inorganic compound of 500 cal / g or less and having a mass ratio of component (C) to sodium bicarbonate ((C) / sodium bicarbonate) of 0.6 to 7.0 .
The following components (A) to (C):
(A) Carbonate containing 15% by mass or more and 100% by mass or less of sodium hydrogen carbonate 20% by mass or more and 50% by mass or less (B) Organic acid (C) The calorific value when 1.0 g is dissolved in water is 150 cal / g Containing an inorganic compound of 500 cal / g or less, the mass ratio of component (C) to sodium bicarbonate ((C) / sodium bicarbonate) being 0.6 or more and 7.0 or less, and at least in the bath water A solid foaming bath agent for use in contact with the skin of a part of the body.
3. The solid foaming bath preparation according to claim 2, wherein a part of the body is a foot, an arm, or a hand.
The solid foaming bath agent according to any one of claims 1 to 3, wherein the content of sorbitol (D) is 7.5% by mass or less.
Component (B) is one or more selected from fumaric acid, citric acid, malic acid, tartaric acid, succinic acid, maleic acid, phthalic acid, glutaric acid, adipic acid, benzoic acid, salicylic acid, and oxalic acid The solid foaming bath agent according to any one of claims 1 to 4.
The solid foamable bath agent according to any one of claims 1 to 5, wherein the component (A) contains one or more selected from sodium carbonate, magnesium carbonate, potassium carbonate, and calcium carbonate.
The solid foamable bath agent according to any one of claims 1 to 6, wherein the component (C) is anhydrous magnesium sulfate.
The solid effervescent bath preparation according to any one of claims 1 to 7, wherein the form is a tablet tablet or a briquette tablet.
Use of the solid foaming bath agent according to any one of claims 1 to 8, which is used by putting it in bath water and bringing it into contact with at least a part of the skin of the body.
The use according to claim 9, wherein the body part is a foot, an arm, or a hand.
The solid foamable bath preparation according to any one of claims 1 to 8 is poured into bath water, and at least a part of the body is immersed in the bath water, so that at least a part of the skin of the body is immersed in the bath water. A bathing method in which a solid foaming bath agent is brought into contact with the bath.
The bathing method according to claim 11, wherein the body part is a foot, an arm, or a hand.