JPH07309743A - Bathing agent composition - Google Patents

Abstract

PURPOSE:To obtain a bathing agent composition, containing an alkali metallic salt of silicic acid and/or metasilicic acid and an organic acid under specific conditions, having skin beautifying effects due to an improvement in flexibility, elasticity and wrinkles of the skin after bathing and excellent in preservation stability and solubility. CONSTITUTION:This bathing agent composition contains an alkali metallic salt of silicic acid and/or metasilicic acid coated with a water-soluble polymer which is a solid at normal temperatures and a solid water-soluble organic acid (e.g. citric acid or tartaric acid). The coating treatment is carried out by using a method for mixing and stirring the powdery alkali metallic salt of silicic acid and/or metasilicic acid (e.g. sodium salt) with the solid water-soluble polymer (e.g. polyethylene glycol) at 1:(0.5-1.5) weight ratio and mechanically coating the alkali metallic salt with the water-soluble polymer, treating the water-soluble polymer liquefied by heating and then cooling and granulating the treated alkali metallic salt, etc. The bathing agent composition is completely soluble in hot water without floating foreign materials and flocculating mutual particles during the preservation.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention contains silicic acid as an active ingredient, an alkali metal salt of metasilicic acid, and an organic acid as a pH adjusting agent to improve the softness, elasticity and wrinkle of the skin. And a bath composition having excellent solubility and storage stability.

[0002]

BACKGROUND OF THE INVENTION Bath compositions are generally sodium sulfate,
A mixture of inorganic salts such as sodium hydrogen carbonate with fragrances and pigments to give a scent and color to the bath water, and to relieve fatigue and give a relaxed feeling by the effect of blood circulation promotion and heat retention due to the action of inorganic salts. It is a thing.

[0003] However, the consumer's preference has also changed from a conventional product that promotes a heat retaining effect to a product that promotes a beautiful skin effect.

Therefore, the present inventors have previously filed Japanese Patent Application No. 5-3.
No. 51938 proposes a collagen metabolism-improving agent containing a silicic acid-related substance (silicic acid, metasilicic acid, orthosilicic acid, water glass) or a salt thereof as an active ingredient, and a bath agent composition for activating collagen metabolism.

[0005]

However, the above-mentioned silicic acid-related substances such as silicic acid and metasilicic acid alkali metal salts are not preferable for the skin because the pH shows alkaline when dissolved in water, and they are not suitable as organic substances as pH adjusters. In practice, it is necessary to add an acid in combination so that the pH after adding to hot water is in the neutral range. However, when an organic acid is directly added to a bath agent composition containing an alkali metal such as silicic acid or metasilicic acid, when the product is stored for a long period of time, the powdery alkali metal silicate and the organic acid react with each other to form a lump. As well as
There is a problem that it becomes insoluble in hot water.

[0006]

The inventor of the present invention has arrived at the present invention as a result of extensive studies to solve the above problems. That is, it is achieved by a bath agent composition characterized by mixing an alkali metal salt of silicic acid and / or metasilicic acid coated with a solid water-soluble polymer at room temperature with a solid organic acid.

Powdered silicic acid used in the present invention and /
Further, examples of the alkali metal salt of metasilicic acid include sodium salt and potassium salt.

As the water-soluble polymer which is solid at room temperature used in the present invention, dextrin, xanthene gum,
Natural high molecular substances such as starch, agar, mannan, gelatin, casein, albumin, collagen, polyvinylpyrrolidone, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, alginate, polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer, polyalkylene An oxide etc. can be mentioned. In particular, when polyethylene glycol having a molecular weight of 4,000 to 20,000 (hereinafter abbreviated as PEG) having surface activity is used, when dissolved in hot water, gas dissolved in water is expelled and Further, it is possible to expect an incidental effect that the bubbles are retained without disappearing for a long time.

Examples of the solid water-soluble organic acid used in the present invention include oxalic acid, citric acid, succinic acid, tartaric acid, fumaric acid, malic acid, etc., and any water-soluble solid organic acid may be used. Can be used in the present invention.

As a method of coating the alkali metal salt of silicic acid and / or metasilicic acid, which constitutes the present invention, with a water-soluble polymer, powdery alkali metal salt of silicic acid and / or metasilicic acid and solid state A method in which a water-soluble polymer is mixed in a weight ratio of 1.0: 0.5 to 1.0: 5.0 and mechanically coated by stirring, and a water-soluble polymer dissolved in an organic solvent is used. A method in which an alkali metal salt of silicic acid and / or metasilicic acid is treated and then desolvated and pulverized, or a method in which a water-soluble polymer liquefied by heating is treated and then cooled and granulated can be used.

Further, as the amount of the solid water-soluble organic acid which constitutes the present invention, an amount by which the alkalinity of the alkali metal salt of silicic acid and / or metasilicic acid is neutralized is used.

The amount of the bath composition of the present invention used is 1 to 1,0.
5 to 30 per day at a concentration of 00 mg / l
It is appropriate to take a minute bath.

As the substances that can be blended in the bath composition of the present invention, the following commonly used known raw materials can be blended, but the substances are not limited to the exemplified ones.

1) Inorganic salts Sodium carbonate, sodium sesquicarbonate, sodium hydrogen carbonate, sodium chloride, sodium sulfate, sodium thiosulfate, ammonium sulfate, magnesium carbonate, borax, calcium nitrate, potassium nitrate, sodium nitrate,
Aluminum sulfate, sodium polyphosphate, ammonium chloride, iron sulfate, sodium phosphate, magnesium sulfate, calcium oxide, magnesium carbonate, sodium sulfide, potassium sulfide, etc.

2) Polyhydric alcohol Glycerin, dipropylene glycol, sorbitol, etc.

3) Crude drugs, herbs Chimp, Toki, carrot, peony, ginger, perilla, mugwort, chamomile, peppermint, psyllium, peach, aloe, loofah, etc.

4) Dyes Blue No. 1, Blue No. 2, Yellow No. 4, Yellow No. 5, Yellow 202
No. (1), Red No. 106, Orange No. 205, riboflavin, etc.

5) Fragrances

[0019]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. The coating treatment method and bathing effect evaluation test method used in the present invention are as follows.

(Coating treatment method) 1) Sodium metasilicate / PEG Powder of sodium metasilicate having a particle diameter of 0.5 to 1.0 mm and PEG (molecular weight 4,000) melted by heating are mixed by stirring and then cooled. 5.0-10mm
Sodium metasilicate coated with PEG of particle size was produced.

2) Sodium silicate / polyvinylpyrrolidone 20% of sodium silicate powder having a particle size of 0.5 to 1.0 mm and polyvinylpyrrolidone (molecular weight 40,000)
Ethanol solution is stirred and mixed, and ethanol is removed from this dispersion with a drier, and then 2.0 to 5.0 m with a pulverizer.
A sodium silicate coated with polyvinylpyrrolidone of m particle size was prepared.

(Bathing Effect Evaluation Test Method) 30 g of the bath composition of Examples 1 and 2 or 1 of the bath composition of Comparative Example 3 was used.
5 grams was poured into hot water at 41 ° C. And female test subjects (35-55) who complain of rough skin, fine wrinkles, dry skin, etc.
20 years old, the test sample was used every day for 3 consecutive months, and then evaluated for improvement of skin flexibility, elasticity, and wrinkles. For each item, the number of respondents who answered "improved skin flexibility", "improved skin elasticity", and "improved skin wrinkles" was shown.

Examples 1 and 2, Comparative Examples 1 to 3 Sodium metasilicate or sodium silicate coated and granulated with PEG or polyvinylpyrrolidone and powder of anhydrous citric acid or tartaric acid were mixed, and each component shown in Table 1 was mixed. Was prepared. Also, as a comparative example,
Those not containing the constituents of the present invention were prepared at the same time. These preparations were filled in a glass container and stored at 30 ° C. for 1 month, and the change with time was observed. As a result, in Comparative Examples 1 and 2, the particles were aggregated and changed into lumps, but in Examples 1 and 2 and Comparative Example 3, the initial state was maintained. Next, according to the method described above, Examples 1 and 2 and Comparative Example 1 which are test samples
3 to 3 were poured into hot water, and a bathing effect evaluation test was performed.
However, since Comparative Examples 1 and 2 were poured into hot water but did not dissolve, no evaluation test of bathing effect was conducted. Table 2 shows the evaluation results at that time. Further, when Example 1 using PEG was poured into hot water, the gas dissolved in water was expelled to form bubbles on one side, and the effect that the bubbles were retained without disappearing for a long time was obtained.

[0024]

[Table 1]

[0025]

[Table 2]

As is clear from Table 2, the effect was found in the practical test.

[0027]

EFFECTS OF THE INVENTION The bath composition of the present invention is
It has elasticity and a beautiful skin effect due to the improvement of wrinkles, does not agglomerate particles during storage, and does not completely dissolve in hot water to float foreign substances, and is extremely excellent as a bath composition. There is.

Claims (1)

[Claims] 1. An alkali metal salt of silicic acid and / or metasilicic acid coated with a water-soluble polymer that is solid at room temperature,
A bath agent composition prepared by mixing with a solid water-soluble organic acid