JPH0665055A - Bathing agent composition - Google Patents

Abstract

PURPOSE:To obtain a bathing agent capable of providing skin with high moisture retaining effects and refreshing touch after bathing. CONSTITUTION:A bathing agent composition comprises a magnesium salt and a carbonate, has 40-80wt.% magnesium salt in the composition and adjusts water in a bathtub to pH 8-9 (0.01wt.% aqueous solution).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath agent composition having a high heat retention effect and an excellent skin feel after bathing.

[0002]

2. Description of the Related Art Bath agents have hitherto been put on the market with various kinds of hot spring ingredients blended in order to meet the demand for easily realizing hot springs at home. In particular, magnesium sulfate is known to have a high heat-retaining effect (for example, Journal of Japanese Society of Biometeorology, 29 (1): 25-33, 1992).
It is known that the effect is further enhanced by further combining a specific inorganic salt (JP-A-63-5132).
No. 2).

[0003]

However, the conventional bathing agents containing these inorganic salts do not yet have a sufficient heat-retaining effect, and even if the heat-retaining effect is obtained, it is refreshing to the skin after bathing. There was a problem that it was not possible to give that feeling. Therefore, there has been a demand for a bath agent having a high heat retaining effect and capable of imparting a refreshing feel to the skin after bathing.

[0004]

[Means for Solving the Problems] Under such circumstances, as a result of intensive studies by the present inventors, if magnesium salt and carbonate are blended and the bath water at the time of use is adjusted to a specific pH, It was found that a bath agent composition having a high heat retention effect and giving a refreshing feel to the skin after bathing can be obtained.
The present invention has been completed.

That is, the present invention contains a magnesium salt and a carbonate, the content of the magnesium salt is 40 to 80% by weight of the composition, and the pH of the bath water during use is 8 to 8.
It is intended to provide a bath agent composition adjusted to 9 (0.01% by weight aqueous solution).

Examples of the magnesium salt used in the present invention include inorganic magnesium salts such as magnesium sulfate, magnesium chloride and magnesium carbonate; and soluble carboxylic acid magnesium salts such as magnesium lactate and magnesium citrate. Of these, anhydrous or hydrous magnesium sulfate is particularly preferable.

These magnesium salts have a composition of 4
0 to 80% by weight (hereinafter referred to simply as%), preferably 5
It is preferable that the concentration of magnesium salt in the bath water is 40 to 270 ppm, especially 50 to 230 ppm. If it is less than 40%, the heat retaining effect is not sufficient, and if it exceeds 80%, it is difficult to obtain a refreshing feeling on the skin.

Examples of the carbonate used in the present invention include sodium carbonate, potassium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, sodium sesquicarbonate and the like. Of these, sodium carbonate and sodium hydrogen carbonate are particularly preferable. These carbonates can be used alone or in combination of two or more, and it is particularly preferable to use 60% or more of dibasic carbonate such as sodium carbonate and potassium carbonate in the carbonate.

These carbonates have a composition of 20 to 60 in the total composition.
%, Particularly 30 to 50% is preferable, and the concentration in the bath water is 10 to 400 ppm, especially 30 to 400 ppm.
Is preferred.

The bath composition of the present invention is required to have a pH of 8 to 9 when made into a 0.01% aqueous solution (40 ° C.). If the pH is less than 8, bicarbonate ion [HC
O ₃ ⁻ ] and carbonate ion [CO ₃ ²⁻ ] are present in a small amount, and a sufficient refreshing feeling cannot be obtained. If the pH exceeds 9, the bath material is adversely affected, which is not preferable.

In addition to the above-mentioned essential components, other general-purpose raw materials used in ordinary bath additives can be used in the bath additive composition of the present invention. When an acidic substance or alkaline substance is added, the final composition PH of bath water when using
It is necessary to consider so that it becomes ~ 9.

Examples of such general-purpose raw materials include boric acid,
Inorganic acids such as metasilicic acid and silicic acid anhydride; organic acids such as benzoic acid, citric acid, fumaric acid, succinic acid, tartaric acid, pyrrolidonecarboxylic acid, adipic acid, salicylic acid; sodium chloride, sodium sulfate, sodium nitrate, potassium chloride, Inorganic salts such as sodium polyphosphate;
Crude drugs such as spruce, spruce, swordfish, cockpit, chamomile, peach; oils and fats such as liquid paraffin, squalane, jojoba oil, isopropyl palmitate; alcohols such as ethanol and stearyl alcohol; many such as glycerin, propylene glycol, sorbitol, etc. Polyhydric alcohols; surfactants such as polyoxyethylene alkyl ether sulfate and polyoxyethylene alkyl ether; other titanium oxide, zinc oxide, talc, sulfur, fragrances, dyes, humectants, etc. It can be appropriately blended within a range that does not impair the effect.

The bath agent composition of the present invention can be produced by a conventional method, and can be made into various forms such as powder, granules, tablets and the like.

[0014]

The bathing agent composition of the present invention has a bath water pH of 8
By allowing magnesium ions and bicarbonate ions or carbonate ions to exist in the bath water so as to be ~ 9,
It has a high heat retention effect and gives a refreshing feel to the skin after bathing.

[0015]

EXAMPLES Next, the present invention will be further described with reference to examples, but the present invention is not limited to these examples.

Example 1 A bathing agent composition having the composition shown in Table 2 was produced by a conventional method, and the warm feeling and refreshing feeling after bathing were evaluated. The average value of the results is shown in Table 2. (Evaluation method) 25 ° C, 50% R by 10 panelists
In the room of H, a whole-body bath was performed at 40 ° C. for 5 minutes, and the warm feeling after the bath and the refreshing feeling of the skin after the bath were evaluated according to the following criteria. The bath additive was used by dissolving 20 g in 200 l of bath water.

[0017]

[Table 1] Evaluation criteria: (Warm feeling after bathing) 5: Very warm. 4: It gets warm. 3: It gets a little warm. 2: Neither can be said. 1: Does not heat up. (Refreshing feeling after bathing) 5: Very refreshing. 4: Refresh. 3: A little refreshing. 2: I don't feel. 1: Sticky.

[0018]

[Table 2]

Claims (1)

[Claims] 1. A magnesium salt and a carbonate are contained, the content of the magnesium salt is 40 to 80% by weight of the composition, and the pH of the bath water at the time of use is 8 to 9 (0.01% by weight).
Bath solution composition prepared as an aqueous solution).