JPS60215614A - Weak-acidity bath preparation - Google Patents

Abstract

PURPOSE:A weak-acidity bath preparation that is obtained by adding extract of sea weeds to a bath preparation which contains a carbonate salt and an acid and develops a weak-acidity pH in the bath, thus developing enhanced synergism of blood flow stimulation and good skin moistening feel. CONSTITUTION:The objective weak-acidity bath preparation is formed by adding 0.001-10%, preferably 0.01-2%, based on the total composition, of a sea algae selected from green algae such as Ulva stenophyla, Codium fragile; brown algae such as Padina arborescens, Nemcystus decipiens and red algae such as Acanthopeltis japonica to a weak-acidity preparation containing a carbonate such as sodium sesquicarbonate, potassium carbonate or ammonium carbonate and an acid such as succinic, fumaric or phosphoric acid or their acidic salts. Since carbon dioxide exists in the free form in the preparation, it develops good effect to stimulate blood flow in the skin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a novel weakly acidic bath additive, more specifically, a seaweed extract is blended into a bathing additive that contains carbonate and acid and exhibits a weakly acidic bath water pH during use. In particular, the present invention relates to a weakly acidic bath additive that synergistically enhances the effect of promoting blood circulation and the firmness and feeling of the skin.

Bath additives are generally a mixture of inorganic salts such as mirabilite, borax, sulfur, salt, and carbonates, combined with fragrances, colorants, plant extracts, and organic acids. By applying moderate stimulation to the surface, it activates blood circulation, relieves fatigue, and improves metabolism. Among these bath additives, there are effervescent bath additives that combine carbonate and acid, which generate carbon dioxide gas bubbles in the bath water, increasing the feeling of relaxation and refreshment, and making bathing more enjoyable. have an effect.

However, conventional foaming bath additives are neutral or slightly alkaline, and almost all of the carbon dioxide gas generated does not dissolve in the water and evaporates into the air, so the carbon dioxide bubbles are simply a sensation. It only had a mechanical effect.

Therefore, the inventors of the present invention conducted various research and created a bath additive that contains carbonate and acid and makes the pH of the bath water slightly acidic, thereby retaining carbon dioxide gas in the bath liquid and promoting blood circulation. 9 Furthermore, the present inventor has discovered that when seaweed extract is added to this bath additive, the blood circulation promoting effect and the moist feeling of the skin are synergistically enhanced. Completed the invention.

That is, the present invention provides a weakly acidic bathing agent containing a carbonate and an acid, which contains a sebum secretion stimulant.

Examples of the carbonate to be incorporated into the weakly acidic bath additive of the present invention include sodium hydrogen carbonate, sodium carbonate, sodium sesquicarbonate, potassium hydrogen carbonate, potassium carbonate, potassium sesquicarbonate, ammonium hydrogen carbonate salt, and ammonium carbonate. salts, sesquiammonium carbonate salts, etc.
These can be used alone or in combination of two or more.

Further, as the acid, both organic acids and inorganic acids can be used, but water-soluble and solid acids are preferred.

Examples of organic acids include straight chain fatty acids such as formic acid, acetic acid, propionic acid, butyric acid, and valeric acid; oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, fumaric acid, maleic acid, phthalic acid, Dicarboxylic acids such as isophthalic acid and terephthalic acid; acidic amino acids such as glutamic acid and aspartic acid; gelcholic acid, lactic acid, hydroxyacrylic acid, α-oxybutyric acid, glyceric acid, tartronic acid,
Malic acid, tartaric acid, citric acid, salicylic acid (o, m
.

pL Oxyacids such as gallic acid, mandelic acid, tropic acid, ascorbic acid, gluconic acid; cinnamic acid, benzoic acid, phenylacetic acid, nicotinic acid, kainic acid, sorbic acid, pyrrolidonecarboxylic acid, trimellitic acid, benzenesulfonic acid, Mention may be made of toluenesulfonic acid and acid salts of these organic acids. Examples of inorganic acids include phosphoric acid, potassium dihydrogen phosphate, sodium dihydrogen phosphate, sodium saliva sulfate, potassium sulfite, sodium pyrosulfate (sodium metabisulfite), potassium pyrosulfate (potassium metabisulfite) , acidic sodium hexametaphosphate, acidic potassium hexametaphosphate, acidic sodium birophosphate, acidic potassium pyrophosphate, sulfamino acid, and the like. Particularly preferred are aliphatic dicarboxylic acids such as co-phosphoric acid, fumaric acid, phosphoric acid, and acid salts thereof. Examples of seaweeds that can be used as raw materials for the seaweed extract of the present invention include Anasasa, Mil, Usuba Aonori, Green algae plants such as Hitoegusa, Sujiaonori, Kasanori, Heraiwatsuda, Hanemo, Nagamil;
Brown algae plants such as Matsuo, Iwahige, Habanori, Urushigusa, Casino, Macompu, Wakame, Tororo kelp, Hijiki, Arame, Sargassum, Sea Trap, Sugimori, and Obamori; , Fukurofunori, Toriashi, Hikadenori, Tosakanoori, Togekirinsai, Akabaginnanso, Kotojitsunomata, Tsunomata, Ayanishiki, Makuri, Egonori, Ogonori, and Ibaranori, among which, brown algae are preferred.

The method for extracting active ingredients from seaweed is not particularly limited, and any of organic solvents, inorganic solvents, polar solvents, and non-polar solvents can be used. For example, an extract can be obtained from brown algae plants as follows.

■ Cut the brown gravel into small pieces and wash with cold water at about 10℃ to remove inorganic substances (aluminum, calcium, etc.) and impurities attached to the surface. Next, after performing centrifugation, it is swollen with a sodium chloride solution to form a highly viscous colloid, and then centrifuged again. Dry to make a powdered product.

■ The brown algae are washed with seawater, crushed, and then dehydrated by squeezing in calcium chloride acidic water. Next, extraction is performed using a mixed solvent of lower alcohol and hexane.

The blending amounts of carbonate and acid in the weakly acidic bath additives of the present invention are such that when the bath additives are added to the bath water, the bath water exhibits weak acidity, i.e., the pH of 0.01% by weight of the bath additives in the armpit is 4. ~7,
Particularly preferably, it is necessary to adjust the pH to 6.0 to 6.7. If the pH is lower than 4, there is a strong stinging effect on the skin and there is a tendency to damage bathtubs, etc., and I) H is 7.
If it exceeds this value, the effects of the present invention will not be achieved.

The effect of the present invention is that when the pH is acidic, carbon dioxide gas is CO
This is based on the principle that, although PF exists as two molecules and exhibits a blood flow promoting effect, on the alkaline side, the effect is not observed at all because it exists as carbon dioxide co3'''- ions or HCO,- ions. It is.

The blending amounts of carbonate and acid that meet these conditions vary depending on the type of carbonate and acid, but for the entire composition, carbonate should be mixed with 5 to 80 g, especially 10 to 50 g, and acid should be mixed with 10 to 80 g. 15 to 50 is particularly preferred.

In addition, seaweed extract can be added in a wide range of amounts, but generally 0.001 to 10 parts, especially 0.01 parts to the total composition.
~2゜ is preferable.

Furthermore, the bath additives of the present invention may contain fragrances, pigments, vitamins, active ingredients of hot springs, proteolytic enzymes, sodium alginate, dinoline, silicone,
The effects can be further enhanced by adding crude drugs or their extracts.

The weakly acidic bath additives of the present invention include powders, granules, crystals, tablets, etc.
Particularly preferably, they can be in the form of tablets, and for their formulation, excipients, binders, disintegrants,
A lubricant or the like may also be added.

As shown above, the slightly acidic bath additive of the present invention has a pH that is approximately the same as that of human skin, so it has a favorable effect on the skin.

Moreover, the carbon dioxide gas generated when pouring into the bath water does not have the effect of promoting blood flow in alkaline conditions because it exists as ions, but in acidic conditions as in the present invention, it exists as CO2 molecules and has an excellent effect of promoting blood circulation in the skin. play.

Next, an example will be given and explained.

Example 1 14 g of HF was added to the bath additives having the compositions shown in Table 1, and each bath additive was added to bath water to make a 0.01% aqueous solution, and 30 panelists used it according to the usual method for one month. The bath additives were evaluated for their overall evaluation (overall feeling of use), the feeling of swelling, whether or not the water cooled, and the feeling of moisturizing the skin.

Margin below Table 1 The results are shown in Table 2.

Table 2 that's all

Claims (1)

[Claims] 1. A weakly acidic bathing agent containing a carbonate and an acid, which is characterized by containing a seaweed extract.