JP6829620B2 - Solid bath salt - Google Patents

Description

The present invention relates to solid bath salts.

Conventionally, bath salts containing a carbonate and an organic acid generate carbon dioxide bubbles in the bath water, and the carbon dioxide gas promotes blood circulation and gives a feeling of warmth. Widely known as an excellent bath salt. Research has also been conducted to bring about additional effects and synergistic effects by further adding various components to such bath salts.

For example, Patent Document 1 discloses a solid bath composition using malic acid as an organic acid and a specific amount of fumaric acid, and describes that inorganic salts such as sardine can also be used, and has excellent moldability. It has a soft and moist feeling, eliminates floating substances, and improves the surface condition of the bath water. Further, Patent Document 2 describes organic acids such as citric acid, fumaric acid, tartaric acid and adipic acid, carbonates, inorganic salts such as sodium sulfate, sodium thiosulfate and potassium sulfate, and specific binders and oils. A solid bathing agent having a specific hardness, which is obtained by pressure-molding a powder containing and, is disclosed, and exhibits quick solubility and high foaming power at the time of use to enhance the feeling of use.

On the other hand, it is also known that magnesium sulfate, which is an inorganic salt, is useful in trying to further enhance the warm bath effect in such bath salts, and its hydrate has been approved as an active ingredient of quasi-drugs. There is.

Japanese Unexamined Patent Publication No. 2004-83584 Japanese Unexamined Patent Publication No. 2014-129262

However, when magnesium sulfate hydrate is used as one component of the solid bathing agent, the presence of water molecules contained in the magnesium sulfate hydrate increases the risk of deterioration in moldability and storage stability. Even if magnesium sulfate hydrate is used, it is difficult to prevent the occurrence of sticking during production, and after long-term storage, it cannot show sufficient solubility in bath water, and it is still improved. There is room.

That is, in the present invention, magnesium sulfate hydrate is used to effectively enhance the feeling of warmth, ensure good moldability, and exhibit excellent solubility in bath water even after long-term storage. Regarding solid bath salts that can be made.

Therefore, as a result of various studies, the present inventor hydrated magnesium sulfate while using fumaric acid, which is said to have low solubility in bath water, as the main component of the organic acid to be used in combination with carbonate. By using a substance and sodium sulfate in combination at a specific total content and a specific mass ratio, a solid bath that can unexpectedly solve the problems peculiar to magnesium sulfate hydrate and exert excellent effects. It was found that the agent could be obtained.

Therefore, the present invention describes the following components (A), (B), (C), and (D):
(A) An organic acid containing 35% by mass or more of fumaric acid,
(B) Carbonate,
It contains (C) magnesium sulfate hydrate and (D) sodium sulfate, and the total content of the component (C) and the component (D) is 0.1% by mass or more and 25% by mass or less, and the component (C). ) To the mass ratio ((C) / (D)) of the content of the component (D) is 0.28 or more and 2.0 or less.

According to the solid bath salt of the present invention, while using magnesium sulfate hydrate as one component, it prevents the occurrence of sticking and secures good moldability, and is excellent in bath water even after long-term storage. In addition to being able to express solubility, it is possible to further enhance the blood circulation promoting effect and effectively enhance the feeling of warmth.

Hereinafter, the present invention will be described in detail.

The solid bath salt of the present invention contains an organic acid containing 35% by mass or more of fumaric acid as the component (A). Although fumaric acid has a particularly low solubility in bath water among organic acids, magnesium sulfate hydrate of component (C) and sodium sulfate of component (D), which will be described later, have a specific total content and a specific mass. Combined with the coexistence of ratio, it is possible to suppress the deterioration of moldability and storage stability due to the unexpected presence of magnesium sulfate hydrate, and excellent dissolution in bath water even after long-term storage. It becomes possible to express sex.

The content of fumaric acid is 35 in the component (A) from the viewpoint of ensuring the amount of carbon dioxide generated, maintaining good storage stability, and exhibiting excellent solubility even after long-term storage. It is mass% or more, preferably 50 mass% or more, more preferably 95 mass% or more, and preferably 100 mass% or less. The content of fumaric acid in the component (A) is 35% by mass or more, preferably 50 to 100% by mass, more preferably 95 to 100% by mass, and further preferably 100% by mass. %.

In addition to the fumaric acid described above, the component (A) may also contain other organic acids. Examples of the organic acid other than fumaric acid include one or two selected from malic acid, tartaric acid, citric acid, maleic acid, succinic acid, phthalic acid, glutaric acid, adipic acid, benzoic acid, salicylic acid, oxalic acid and the like. The above can be mentioned. Among them, one or more selected from citric acid, malic acid, and succinic acid are preferable from the viewpoint of ensuring storage stability.

The content of the component (A) secures the amount of carbon dioxide generated, sufficiently enhances the blood circulation promoting effect in combination with the component (C) and the component (D) described later, and effectively enhances the feeling of warmth and its sustainability. From the viewpoint, in the solid bath salt of the present invention, it is preferably 15% by mass or more, more preferably 20% by mass or more, further preferably 30% by mass or more, and preferably 70% by mass or less. It is more preferably 60% by mass or less, and further preferably 50% by mass or less.

The solid bath salt of the present invention contains a carbonate as a component (B). When the solid bath salt of the present invention is put into bath water, the component (B) generates carbon dioxide gas together with the component (A) to bring about a blood circulation promoting effect and give a good feeling of warmth. it can.
The component (B) is selected from monoalkalimetal carbonates such as sodium hydrogencarbonate and potassium hydrogencarbonate, and carbonates of divalent or higher metals such as calcium carbonate; dialkalimetal carbonates such as sodium carbonate and potassium carbonate. One kind or two or more kinds are mentioned.

Among them, carbonic acid is preferably contained from the viewpoint of ensuring good moldability and high storage stability while effectively enhancing the feeling of warmth, and carbonic acid from the viewpoint of ensuring a good foaming feeling. More preferably, it contains sodium. That is, it is preferable to use a mono-alkali metal carbonate and a di-alkali metal carbonate in combination. The content of the dialkali metal carbonate is preferably 50% by mass or more, more preferably 53% by mass or more in the component (B) from the viewpoint of ensuring good moldability and high storage stability. Yes, more preferably 55% by mass or more, preferably 100% by mass or less, more preferably 90% by mass or less, still more preferably 80% by mass or less. The content of the dialkali metal carbonate in the component (B) is preferably 50 to 100% by mass, more preferably 53 to 90% by mass, and further preferably 55 to 80% by mass.

The content of the component (B) secures the amount of carbon dioxide generated, sufficiently enhances the blood circulation promoting effect in combination with the component (C) and the component (D) described later, and effectively enhances the feeling of warmth and its sustainability. From the viewpoint, in the solid bath salt of the present invention, it is preferably 15% by mass or more, more preferably 20% by mass or more, further preferably 30% by mass or more, and preferably 70% by mass or less. It is more preferably 60% by mass or less, and further preferably 50% by mass or less.

The solid bath salt of the present invention contains magnesium sulfate hydrate as the component (C). Although such a component (C) is an active ingredient capable of enhancing a feeling of warmth, when used as one component of a solid bath salt, moldability and storage stability may be deteriorated, but in the solid bath salt of the present invention. , It is possible to effectively prevent the occurrence of sticking and the like during production to ensure good moldability, and it is possible to exhibit sufficient solubility in bath water even after long-term storage.

Examples of such a component (C) include magnesium sulfate trihydrate and magnesium sulfate heptahydrate. Of these, magnesium sulfate trihydrate is preferable from the viewpoint of ensuring good moldability and storage stability, and from the viewpoint of handleability.

The content of the component (C) is preferably 0.03% by mass or more in the solid bath salt of the present invention from the viewpoint of effectively enhancing the feeling of warmth in combination with the component (D) described later and other components. Yes, more preferably 0.1% by mass or more, still more preferably 1% by mass or more. Further, the content of the component (C) is contained in the solid bath salt of the present invention from the viewpoint of ensuring good moldability and storage stability, and from the viewpoint of ensuring good solubility in bath water after long-term storage. In addition, it is preferably 12.5% by mass or less, more preferably 10% by mass or less, and further preferably 5% by mass or less. The content of the component (C) is preferably 0.03 to 12.5% by mass, more preferably 0.1 to 10% by mass, and further preferably 0.1 to 10% by mass in the solid bath salt of the present invention. It is 1 to 5% by mass.

The solid bath salt of the present invention contains sodium sulfate as a component (D). Such a component (D) has an action of promoting the enhancement of the feeling of warmth caused by the component (C), and can effectively suppress a decrease in moldability and storage stability due to the presence of the component (C).

The content of the component (D) is preferably 0.03% by mass or more in the solid bath salt of the present invention from the viewpoint of effectively enhancing the feeling of warmth in combination with the component (C) and other components. It is more preferably 0.1% by mass or more, and further preferably 1% by mass or more. Further, the content of the component (D) is contained in the solid bath salt of the present invention from the viewpoint of ensuring good moldability and storage stability, and from the viewpoint of ensuring good solubility in bath water after long-term storage. In addition, it is preferably 19.5% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less. The content of the component (C) is preferably 0.03 to 19.5% by mass, more preferably 0.1 to 15% by mass, and further preferably 0.1 to 15% by mass in the solid bath salt of the present invention. It is 1 to 10% by mass.

In the solid bath salt of the present invention, the total content of the component (C) and the component (D) is the solid bath salt of the present invention from the viewpoint that these components are combined to effectively enhance and maintain the feeling of warmth. Among them, it is 0.1% by mass or more, preferably 1% by mass or more, more preferably 2% by mass or more, and further preferably 3% by mass or more. Further, the total content of the component (C) and the component (D) is determined from the viewpoint of ensuring good moldability and storage stability, and from the viewpoint of ensuring good solubility in bath water after long-term storage. In the solid bath salt of the present invention, it is 25% by mass or less, preferably 20% by mass or less, more preferably 15% by mass or less, and further preferably 10% by mass or less. The total content of the component (C) and the component (D) is 0.1% by mass or more and 25% by mass or less, preferably 1 to 20% by mass, in the solid bath salt of the present invention. It is more preferably 2 to 15% by mass, and even more preferably 3 to 10% by mass.

In the solid bath salt of the present invention, the mass ratio ((C) / (D)) of the content of the component (C) to the content of the component (D) gives a feeling of warmth while ensuring good moldability. From the viewpoint of enhancing, it is 0.28 or more, preferably 0.29 or more, and more preferably 0.3 or more. Further, the mass ratio ((C) / (D)) of the content of the component (C) to the content of the component (D) is from the viewpoint of effectively combining good solubility in bath water after long-term storage. , 2.0 or less, preferably 1.0 or less, more preferably 0.8 or less, still more preferably 0.5 or less. The mass ratio ((C) / (D)) of the content of the component (C) to the content of the component (D) is 0.28 or more and 2.0 or less, preferably 0.29 to 0.29 to 2.0. It is 1.0, more preferably 0.3 to 0.8, and even more preferably 0.3 to 0.5.

Mass ratio of the total content of component (A) and component (B) to the total content of component (C) and component (D) ({(A) + (B)} / {(C) + (D) )}) Is preferably 3 or more, more preferably 4 or more, still more preferably 5 or more, from the viewpoint of obtaining a good foaming feeling due to the generated carbon dioxide gas. Further, the mass ratio of the total content of the component (A) and the component (B) to the total content of the component (C) and the component (D) ({(A) + (B)} / {(C) + (D)}) is preferably 100 or less, more preferably 75 or less, from the viewpoint of effectively enhancing the feeling of warmth and ensuring good solubility in bath water after long-term storage. , More preferably 50 or less. Then, the mass ratio of the total content of the component (A) and the component (B) to the total content of the component (C) and the component (D) ({(A) + (B)} / {(C) + (D)}) is preferably 3 to 100, more preferably 4 to 75, and even more preferably 5 to 50.

The solid bath salt of the present invention preferably further contains a water-soluble polymer (E) from the viewpoint of exhibiting good moldability and solubility. Examples of such component (E) include synthetic water-soluble polymers such as polyethylene glycol, polyvinylpyrrolidone, sodium polyacrylic acid, polyethyleneimine, and polyvinyl alcohol; starch, gelatin, collagen protein, casein, sodium alginate, carrageenan, and furcereran. Natural water-soluble polymers such as tamarind gum, pectin, arabic gum, guar gum, xanthan gum, tragant gum, locust bean gum, dextrin, dextran, agar, starch; carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, cellulose acetate, One or more selected from semi-synthetic water-soluble polymers such as propylene glycol alginate, oxidized starch, esterified starch, etherified starch, and cationic starch can be mentioned. Among them, one or two selected from polyethylene glycol and dextrin are preferable, and polyethylene glycol is more preferable.

The content of the component (E) is preferably 1% by mass or more, more preferably 1.5% by mass or more in the solid bath salt of the present invention from the viewpoint of ensuring good moldability and solubility. Yes, more preferably 2% by mass or more. Further, the content of the component (E) is preferably 25% by mass or less, more preferably 20% by mass or less, and further preferably 20% by mass or less in the solid bath salt of the present invention from the viewpoint of ensuring the amount of carbon dioxide gas generated. It is preferably 15% by mass or less.

The solid bath salt of the present invention may contain an oil agent. By containing such an oil agent, the bubbles of carbon dioxide gas generated by the component (A) and the component (B) can be made finer to bring about a good feeling of use, and it is also possible to promote the enhancement of the feeling of warmth. Examples of such oils include cetyl octanoate, cetyl isooctanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isocetyl myristate, octyldodecyl myristate, isopropyl palmitate, isostearyl palmitate, isopropyl adipate, stearic acid. Fatty acid esters such as butyl acid acid, isocetyl stearate, isostearyl isostearate, isotridecyl isononanoate, decyl oleate, cholesterol isostearate;
Fatty acid triglyceride such as tri (caprylic acid / capric acid) glycerin and glyceryl tricaprylate;
Natural fats and oils such as soybean oil, nuka oil, jojoba oil, avocado oil, almond oil, olive oil, cacao fat, sesame oil, persic oil, castor oil, coconut oil, mink oil, beef fat, pork fat, and hydrogenated these natural fats and oils. Hardened oil and glycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride;
Hydrocarbon oils such as liquid paraffin, petrolatum, paraffin, microcrystalline wax, selecin, squalane, squalene, dioctylcyclohexane, and pristane;
Higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, lanolinic acid, isostearic acid;
Hakka oil, jasmine oil, show brain oil, hinoki oil, peppermint oil, ryu oil, terepine oil, coconut skin oil, bergamot oil, orange oil, shove oil, pine oil, lavender oil, bay oil, clove oil, hiba oil, Rose oil, eucalyptus oil, lemon oil, thyme oil, peppermint oil, rose oil, sage oil, menthol, cineole, eugenol, citral, citroneral, borneol, linalol, gellerall, camphor, timole, spirantol, pinen, limonen, terpen Essential oils such as compounds;
One type or two or more types selected from silicone oil and the like can be mentioned.

Among them, from the viewpoint of realizing fine bubbles and enhancing the feeling of use after bathing, isopropyl myristate, myristyl myristate, isosetyl myristate, octyldodecyl myristate, isopropyl palmitate, isostearyl palmitate, isostearate isostearate. One or more selected from stearyl, tri (caprylic acid / capric acid) glycerin and glyceryl tricaprylate are preferable.

The solid bath salt of the present invention may appropriately contain a component usually used for a bath salt as a component other than the above-mentioned components. Such components include, for example, nonionic surfactants such as sucrose fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, and other surfactants; potassium chloride, sodium chloride, potassium nitrate. , Sodium nitrate, sodium polyphosphate, ammonium chloride, iron sulfate, sodium phosphate, sodium thiosulfate, and other inorganic salts other than the above components; excipients such as calcium silicate and glucose; disintegration aids; medicinal properties of crude drugs, etc. Ingredients; pigments; fragrances and the like.

The solid bath salt of the present invention can be produced according to a conventional method such as a compression molding method using a press tableting machine or a briquette machine, or a compression granulation method such as extrusion granulation, and the form thereof is a briquette tablet or tablet. , Powder, granules, granules and the like. Further, a part of the component may be granulated or molded in advance, mixed with the remaining component, and then molded. Among them, the tablet form is preferable from the viewpoint of ensuring high solubility even after longer-term storage.

Hereinafter, the present invention will be specifically described based on examples. Unless otherwise specified in the table, the content of each component indicates mass%.

[Examples 1 to 8 and Comparative Examples 1 to 5]
Each bath salt was obtained according to the formulation shown in Table 1.
For tablets in the form of tablets, 100 tablets are continuously compression-molded with a rotary tableting machine using a powder obtained by mixing each component with a mass of 39 to 41 g, and then moldability (presence or absence of sticking). Was evaluated. For briquettes in the form, 10 kg of the above composition is put into a briquette (manufactured by Shinto Kogyo: laboratory briquette BGS-0L, φ10 mm) using powder obtained by mixing each component and continuously compressed. After molding, the moldability (sticking) was evaluated.
Using the obtained bath salt, each evaluation was performed according to the method shown below. The results are shown in Table 1.

<< Moldability (presence or absence of sticking) >>
During the compression process during the production of bath salts, the presence or absence of sticking was visually evaluated according to the following criteria.
A: No adhesion to the pestle or roll B: Slight adhesion to the surface of the pestle or roll, but the surface of the agent was smooth C: Adhesion to the surface of the pestle or roll, unevenness on the surface of the agent D: There was a clear adhesion on the surface of the pestle or roll, which affected the shape of the agent.

<< Warmth while taking a bath >>
After putting 150 L of bath water at 40 ° C into the bathtub and adding 40 g of the obtained bath salt to completely dissolve it, the panelists were immediately bathed for 10 minutes, and the feeling of warmth during the bath was evaluated on a 6-point scale. (1 to 6 points, 6 points is the highest evaluation), and after calculating the average value of 10 panelists, the evaluation result was further determined according to the following criteria.
〔Evaluation criteria〕
6 points: I felt very warm 5 points: I felt warm 4 points: I felt a little warm 3 points: Equivalent to Sarayu 2 points: I did not feel much warm 1 point: I did not feel warm [Judgment criteria] ]
AA: 5 points or more A: 4.5 points or more and less than 5 points B: 4 points or more and less than 4.5 points C: 3.5 points or more and less than 4 points D: less than 3.5 points

《Foam feeling》
In the above evaluation of the feeling of warmth during bathing, the feeling of foaming obtained when the bath salt was dissolved in bath water was evaluated on a 6-point scale (6 points from 1 point to 6 points is the highest). Evaluation), after calculating the average value of 10 panelists, the evaluation result was further calculated according to the following criteria.
〔Evaluation criteria〕
6 points: I felt strong foaming 5 points: I felt foaming 4 points: I felt some foaming 3 points: I can't say either 2 points: I didn't feel much foaming 1 point: I didn't feel foaming [Judgment criteria] ]
AA: 5 points or more A: 4.5 points or more and less than 5 points B: 4 points or more and less than 4.5 points C: 3.5 points or more and less than 4 points D: less than 3.5 points

《Sustainability of warmth after bathing》
In the above evaluation of the feeling of warmth during bathing, the temperature sensation of the toes at the time when 30 minutes have passed after bathing for 10 minutes was evaluated on a 9-point scale (9 points from 1 point to 9 points is the highest evaluation). ), After calculating the average value of 10 panelists, the evaluation result was further calculated according to the following criteria.
〔Evaluation criteria〕
9 points: Very warm 8 points: Very warm 7 points: Warm 6 points: Slightly warm 5 points: Neither 4 points: Slightly cold 3 points: Cold 2 points: Very cold 1 point: Very cold [Criteria]
AA: 8 points or more A: 7 points or more and less than 8 points B: 6 points or more and less than 7 points C: 5 points or more and less than 6 points D: 5 points or less

《Solubility in bath water after long-term storage》
The obtained bath salt immediately after production is stored at 40 ° C. for 6 months, then put into bath water at 40 ° C. and 150 L, and the degree of dissolution of the bath salt is changed to the bath water after long-term storage based on the following formula (1). After calculating the degree of elongation (X) of the dissolution time of the above, the evaluation was made using the obtained value of X as an index to use as the following criteria.
(Degree of extension of dissolution time in bath water after long-term storage (X))
= {Dissolution time after long-term storage / Initial dissolution time} × 100 Equation (1)
[Criteria]
AA: X <122
A: 122 ≤ X <125
B: 125 ≤ X <130
C: 130 ≤ X <140
D: 140 ≤ X

Claims (7)

The following components (A), (B), (C), and (D):
(A) An organic acid containing 35% by mass or more of fumaric acid,
(B) Carbonate,
It contains (C) magnesium sulfate hydrate and (D) sodium sulfate, and the total content of the component (C) and the component (D) is 0.1% by mass or more and 25% by mass or less, and the component (C). ) To the mass ratio ((C) / (D)) of the content of the component (D) is 0.28 or more and 2.0 or less. The solid bath salt according to claim 1, wherein the content of the dialkali metal carbonate in the component (B) is 50% by mass or more and 100% by mass or less. Mass ratio of the total content of the component (A) and the component (B) to the total content of the component (C) and the component (D) ({(A) + (B)} / {(C) + (D) )}) The solid bath salt according to claim 1 or 2, wherein 3 or more and 100 or less. The total content of the component (C) and the component (D) is 0.1% by mass or more and 10% by mass or less, and the mass ratio of the content of the component (C) to the content of the component (D) ((C). ) / (D)) is 0.28 or more and 0.8 or less. The solid bath agent according to any one of claims 1 to 3. The solid bath salt according to any one of claims 1 to 4 , wherein the content of the component (A) is 15% by mass or more and 70% by mass or less. (E) The solid bath salt according to any one of claims 1 to 5 , which contains 1% by mass or more and 25% by mass or less of a water-soluble polymer. The solid bath salt according to any one of claims 1 to 6 , wherein the content of the component (C) is 0.03% by mass or more and 12.5% by mass or less.