JPH01175928A - Bathing agent - Google Patents

Abstract

PURPOSE:To obtain a bathing agent exhibiting the action and effect close to those of natural hot spring, imparting the skin with smooth feeling in bathing and giving refreshing feeling after bath, by adding a metal sequestering agent to sodium carbonate used as a main component. CONSTITUTION:A metal sequestering agent is added to a bathing agent composed mainly of Na2CO3 and exhibiting pH 9-10.5 when dissolved in bath water. The sequestering agent is sodium polyphosphate, sodium citrate, etc., and the amount is 0.1-10wt.% based on the whole bathing agent. The amount of Na2CO3 is 50-90wt.% based on the whole bathing agent. The concentration of Na2CO3 in the bath water should be adjusted to 30-300ppm, preferably 50-200ppm. The bathing agent does not precipitate powder on the bottom of bathtub, gives nearly transparent bath water and is suitable for person who does not like milk-white bath water.

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a bath product that exhibits excellent heat retention and fatigue recovery, as well as provides a smooth feel to the skin during bathing, and provides a refreshing and refreshed feeling to the skin after bathing. Regarding drugs.

[Prior art]

Conventionally used bath additives are mainly composed of a mixture of inorganic salts such as sodium sulfate and sodium hydrogen carbonate, and are blended with auxiliary ingredients such as oils, fragrances, and colorants. It is widely used because it gives fragrance and color, makes you feel refreshed when taking a bath, promotes blood circulation, activates metabolism, and is effective against sensitivity to cold and recovery from fatigue.

In addition to these benefits such as making you feel more comfortable while bathing, keeping you warm, and relieving fatigue, so-called hot springs have recently become popular, giving your skin a smooth feel while bathing and leaving your skin feeling refreshed after bathing. There is a desire for bath additives that exhibit unique effects.

In order to meet these demands, a large number of various bath additives have been proposed, but these bath additives have not fully satisfied the above requirements. For example, JP-A-57-5
Publication No. 6420 discloses a bath agent that contains one or more organic acids as an essential component and further contains an inorganic salt such as sodium carbonate to make the pH slightly alkaline.
Although this product has a clarifying effect in baths, etc., it does not give a sufficiently smooth and refreshing feel to the skin during or after bathing. Moreover, the effects proposed in Japanese Patent Application Laid-open No. 59-70610, Japanese Patent Application Laid-Open No. 59-109709, etc. were insufficient.

The present inventors have previously discovered that a bath agent containing sodium carbonate as a main ingredient and exhibiting a pH value of 9 to 10.5 when dissolved in a bath causes calcium ions in the bath to precipitate as fine particulate calcium carbonate. In addition to the conventional heat-retaining and fatigue-relieving effects, we discovered that it gives the skin a smooth and smooth feel during bathing, and a refreshing feeling after bathing.
(Japanese Patent Application No. 61-291926).

However, although this bath additive has excellent performance as mentioned above, the precipitated calcium carbonate tends to be slightly larger, and when left in the bath at night, a large amount of powder accumulates at the bottom of the bathtub, detracting from its aesthetic appearance. It has the disadvantage of causing damage and discomfort.

[Problem that the invention seeks to solve]

An object of the present invention is to provide a bath agent that suppresses the accumulation of powder at the bottom of a bathtub while retaining the effect of calcium carbonate precipitation, which provides an excellent skin feel during and after bathing.

[Means for solving problems]

According to the present invention, a bath agent containing sodium carbonate as a main component exhibiting a PI (value of 9 to 10.5 when dissolved in bath water), characterized in that it contains a metal ion sequestering agent. is provided.

In the present invention, the blending amount of sodium carbonate is 50 to 90% by weight based on the total amount of the bath agent, but the concentration of sodium carbonate in the bath water is 30 to 300 ppm, preferably 50 to 90% by weight.
It is necessary to adjust the pH to ~200 ppH.

If the concentration in the bath water is less than 30 ppm, it will not be able to give the skin a smooth and smooth feel or a light and refreshing feeling.If the concentration exceeds 300 ppm, the skin will not feel smooth when taking a bath. A slimy feeling develops, which is undesirable.

Furthermore, the bath agent of the present invention has a concentration of 9 to 9 when dissolved in bath water.
Must have a PI value of 10.5. p
If the H value is less than 9, it will not be able to give the skin a smooth, smooth feel or a light and refreshing feeling.On the other hand, if the pH value is more than 10.5, the skin will feel slimy when bathing. A stinging sensation develops, making it impossible to achieve the intended purpose of the present invention.

Furthermore, in the present invention, in order to suppress the generation of large particle size powder that accumulates on the bottom of the bathtub after being left overnight, a sequestering agent that is effective in capturing calcium ions is used. As the metal ion sealant, disodium edetate, sodium polyphosphate, sodium metaphosphate, sodium citrate, etc. can be used, but sodium polyphosphate and sodium citrate are particularly preferred. The blending amount is 0.1 to IO% by weight, preferably 0.5-5% by weight, and less than 0.1% is insufficient to suppress powder accumulation.

Moreover, if it exceeds 10%, the smooth and smooth feel on the skin and the light and refreshing feeling will decrease.

The bath agent of the present invention can be made into a foaming bath agent by adding organic acids such as succinic acid, malic acid, and citric acid. It is necessary to keep the amount within a range that does not inhibit the production of calcium carbonate. In actual use, no problem will arise if the amount is 20% by weight or less, preferably about 5 to 10% by weight, based on the total amount of the bath agent.

In addition to calcium carbonate, any other component may be added to the bath agent of the present invention as long as it does not significantly inhibit the production of carbonic acid sillum. Namely, sodium chloride, potassium iodide, sodium sulfate, sodium hydrogen carbonate, aluminum sulfate, potassium sulfate, boric acid, borax, silicic anhydride, silicic acid, sodium sulfite, phosphoric acid, sodium hydrogen phosphate, dihydrogen phosphate. Potassium, sodium silicate, sodium polyphosphate, calcium hydrogen phosphate,
Inorganic substances such as sodium phosphate, sulfur, and yunohana may be added.Furthermore, in addition to the above-mentioned ingredients, the bath preparation of the present invention may also contain crude drugs, adhesives, essential oils, oils, vitamins, Amino acids, proteolytic enzymes, humectants, and other ingredients can also be added. Specific examples thereof are shown below.

Examples of herbal medicines include Sojura, Biyakujutsu, Valerian, Keigai, Kouboku, Senkyu, Spruce,
Angelica, Shokimi, Scutellariae, Sansin, Gaiyou, Aloe, Carrot, Keihi, Peony, Heart leaf,
Scutellariae, Bukuriyou, Calamus, Pinus japonica, Japanese beak, saffron, Acanthus japonica, Fennel, Chimpi, Gampi,
Chamomile, radish, willow, camphor tree, elderberry, Japanese radish, Japanese radish, Japanese radish, Japanese radish, and mugwort.

Hypericum perforatum, yuzu, Japanese radish, peach, cypress, loquat, honeysuckle, japonica, Japanese daisy, yarrow, yarrow, hop, rosemary, birch, pine,
There are japonica, lantana, licorice, quince, horse chestnut, etc. These may be powders or extracts thereof.

Examples of adhesives include casein, sodium carboxymethyl cellulose, water-soluble gelatin, pectin, starch, methyl cellulose, ethyl cellulose, sodium alginate, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methyl ether, polyethylene glycol, gum karaya, locust bean gum, gum tracanth, and carrageenan. , carbopol, acasha gum,
There are Kanten etc.

Examples of essential oils include peppermint oil, jasmine oil, calamus oil, cypress oil, spruce oil, rhubarb oil, turpentine oil, cinnamon bark oil, bergamot oil, tangerine oil, calamus oil,
Pine oil, lavender oil, Pei oil, clove oil, cypress oil, rose oil, eucalyptus oil, lemon oil, thyme oil, peppermint oil, rose oil, sage oil, menthol, cineole, eugenol, citral, citronellal, borneol, linalool, These include geraniol, camphor, thymol, spilanthol, pinene, limonene, and terpene compounds.

Examples of oils include olive oil, soybean oil, almond oil, fallen beef oil, castor oil, coconut oil, palm oil, tardle oil, bran oil, avocado oil, mink oil, egg yolk oil, beef tallow,
These include lanolin, squalene, jojoba oil, silicone, liquid paraffin, petrolatum, paraffin, etc.

Examples of vitamins include vitamin A, vitamin B
, vitamin C, vitamin D, vitamin E, vitamin F,
Examples include vitamin K, vitamin P, vitamin U, carnitine, ferulic acid, α-oryzanol, α-lipoic acid, orotic acid and derivatives thereof.

Examples of amino acids include glycine, alanine, valine, leucine, isoleucine, serine, threonine, phenylalanine, tyrosine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, glutamic acid, arginine, histidine, lysine and derivatives thereof. etc.

Examples of proteases include pepsin, trypsin, chymotrypsin, cathepsin, papain, promelain, ficin, and proteases derived from bacterial yeasts and molds.

Examples of humectants include polyhydric alcohols such as propylene glycol and glycerin; peptides, polyamino acids,
Collagen hydrolyzates and derivatives thereof: Mucopolysaccharides such as hyaluronic acid; Nucleic acids, proteins such as elastin, and derivatives thereof.

Other ingredients include, for example, tar-based pigments (xanthine-based, etc.) for pharmaceuticals, quasi-drugs, and cosmetics, surfactants (anionic, cationic, surface, and nonionic),
Examples include seaweed extract, fragrances, and fungicides.

〔effect〕

The bath additive of the present invention has the above-mentioned structure, and can impart a smooth and smooth feel to the skin during bathing, which is a feature of calcium carbonate precipitated bath additives, as well as provide a dry and refreshing feeling to the skin after bathing. It exhibits effects similar to those of natural hot springs, such as the ability to absorb water, and has the advantage that there is almost no powder buildup at the bottom of the bathtub. Although it is a calcium carbonate precipitate bath additive, it has a slightly transparent appearance, making it a useful bath additive for some people who do not like dark milky white water.

〔Example〕

Next, the present invention will be explained in more detail with reference to Examples.

Examples 1 to 3, Comparative Examples 1 to 4 Bath additives having the composition and pH as shown in Clothes-1 below were prepared, and each bath additive was added to a bathhouse at a concentration of 150 ppm, and when bathing. The smoothness of the skin, the refreshing feeling after bathing, and the presence or absence of powder precipitation after being left overnight were evaluated.

[Smooth feeling during bathing, refreshing feeling after bathing] One of the left and right forearms was placed in plain hot water at 42°C, and the other was placed in a bath at 42°C with each bath agent added at a concentration of 150 ppm for 5 minutes each. Soaking, the smooth feeling of the skin during soaking, and the refreshing feeling of the skin after towel drying were evaluated according to the following criteria.

Note that the calcium concentration of the bath water is 30 ppm.

(Evaluation criteria) ◎: Very superior effect compared to Sarayu.

O: Superior effect compared to Sarayu.

Δ: Slightly better effect than Sarayu.

×: The effect is equal to or less than that of Sarayu.

(Powder Precipitation) Each bath agent was added to a 200Q bathtub at a concentration of 150 pp+m, and the amount of precipitation after standing for 12 hours was evaluated based on the following criteria.

0: No or very slight precipitation observed.

Δ: Slight precipitation is observed.

X: Considerable precipitation is observed.

Examples 5 to 7 Bath additives having the following component compositions (% by weight) were prepared and evaluated in the same manner as in Example 1. As a result, almost no powder precipitation was observed in any of the bath preparations after being left overnight, and they were excellent in terms of smoothness of the skin during bathing and refreshing feeling after bathing.

Example 5 (powder) Sodium carbonate 70.0 Sodium bicarbonate Balanced sodium tripolyphosphate 5.0 Touki
0.5 Aloe 0.5 Scutellariae 0.5 Fragrance
1.0 dye 0.1 total too,
.

Example 6 (powder) Sodium carbonate 70.0 Sodium bicarbonate Balanced sodium tripolyphosphate 3.0 Sodium citrate
1.0 Chitin Chitosan 1.0 Mink Oil 1.0 Squalene 1.0 Menthol
0.5 mint oil
0°5 Flavor 0.5 Example 7 (granules) Sodium carbonate 65.0 Sodium hydrogen carbonate 15.0 Sodium sulfate
Balance Sodium Tripolyphosphate
1.0 Sodium citrate 4.0 Hyaluronic acid 0.50-Z oil
0.5 papain enzyme (100L
I) 0.5 fragrance 1.0

Claims (3)

[Claims] (1) A bathing agent whose main component is sodium carbonate, which exhibits a pH value of 9 to 10.5 when dissolved in bath water, characterized in that it contains a metal ion sequestering agent. (2) The bath preparation according to claim 1, wherein the sequestering agent is sodium polyphosphate or sodium citrate. (3) The amount of metal ion sequestering agent added to the total amount of bath agent is 0.
．． 1 to 10% by weight of claim 1 or 2.
Bath additives listed in section.