JPH09291024A - Bathing agent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bathing agent composition capable of decomposing and removing calcium salt of soap attached to skin after cleaning soap, excellent in action capable of promoting swelling of keratin and reduced in irritation to skin, capable of providing mild skin care effect on a person having roughed skin and obtaining fresh and refreshing feeling free from stickiness after bathing. SOLUTION: This bathing agent composition does not contain an inorganic alkali metal salt and contains saccharides and an organic acid at a weight ratio of (1/5) to (5/1).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a bath agent composition which is excellent in keratin swelling promoting action and has reduced irritation to the skin.

[0002]

2. Description of the Related Art Bath agents have been used for the purpose of easily using at home bathing therapy such as hot springs and medicated baths, which have been widely used for treating diseases and wounds and maintaining health since ancient times. Bath agents using hot springs are mainly composed of inorganic salts such as mirabilite and baking soda, which are the components contained in hot springs, and alkaline carbonates and organic acids in combination.
Those that adjust H and generate carbon dioxide gas in hot water are commercially available. In addition, as an application of medicinal hot water, in order to conveniently use crude drugs, one that encloses the chopped dried crude drug in an extraction bag made of non-woven fabric and extracts the components in the bath water,
For example, there is a plant extract that is extracted in advance. These exhibit various effects such as enhancing the effect of warm bathing by bathing, recovering fatigue and promoting the effect of relieving chills and stiff shoulders by promoting blood circulation and heat retention. In addition, by adding fragrances and coloring agents, the effect of making the mood during bathing fun and relaxing is added.

On the other hand, in recent years, interest in the skin care effect by bathing has increased, and many proposals have been made for bath agents having a skin care effect. In addition, bathing treatment has been reviewed for relieving skin troubles such as atopic dermatitis, and there is a demand for a bath preparation which can be easily used at home and is effective. In order to meet these demands, bath agents containing various medicinal ingredients have been proposed. Particularly in the application of plant extracts to bath agents, the pharmacological effects of plant extracts, such as anti-inflammatory action, analgesic / sedative action, blood circulation promoting action, skin A large number of bath agents formulated with the expectation of a metabolism promoting action, an antiallergic action, etc. have been proposed and put on the market. In addition, an auxiliary effect of these bath agents for treating atopic dermatitis has been reported. In addition, the addition of moisturizing ingredients such as polyhydric alcohols, polysaccharides and milk ingredients has been devised to prevent the skin from drying out after bathing. Including such bath agents, the skin care effect of bath agents has become a new main function of bath agents.

[0004]

However, there are some problems described below in order for such a bath agent component to sufficiently exert its action. One of them is metal soap such as calcium salt of soap that remains on the skin after washing the body with soap during bathing. The calcium salt of soap is an insoluble salt in which the soap component reacts with calcium in tap water, and remains on the skin even after thorough rinsing. This makes the surface of the skin extremely hydrophobic, hindering the action of baths and bath components. Therefore, how to modify the hydrophobicity of the skin by the calcium salt of this soap so that the bath agent component dissolved in the bath water acts efficiently is an issue. Another problem is the bathing time. Since the keratin swelling effect of a warm bath increases in proportion to the bathing time, long-term bathing is effective in expecting the effects of bath agent components. However, the bathing time is generally about 10 minutes or less, which is not sufficient for manifesting the effect. Therefore, the issue is how to promote keratin swelling. Furthermore, depending on the components of the bath agent, especially in the case of those who are damaged by dry skin, there is a tingling sensation that the skin is tingling in some cases. There is a problem that the components are easily altered.

The present invention is capable of decomposing and removing the calcium salt of soap adhering to the skin after washing with soap, has an excellent action to promote keratin swelling, and also reduces the feeling of irritation to the skin, even for people with rough skin. An object of the present invention is to provide a bath agent composition which can impart a mild skin care effect and can provide a refreshing feeling without a sticky feeling after bathing.

[0006]

According to the present invention, there is provided a bath agent composition containing no alkali metal salt, containing a saccharide and an organic acid, and using the saccharide and the organic acid in a weight ratio of 1: 1.
The bath agent composition is characterized by being / 5 to 5/1.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that an inorganic alkali metal salt, which has hitherto been an essential component in this type of bathing agent, has a blood circulation promoting effect and a refreshing feeling after bathing. Surprisingly, it does not make any contribution to the keratin swelling promoting action, and that a mixture of sugar and organic acid in a specific ratio has a keratin swelling promoting action and a unique action effect to alleviate the sensation of irritating the skin. It was found that The present invention has been made based on such findings.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The bath agent composition of the present invention does not contain inorganic alkali metal salts such as sodium hydrogen carbonate, sodium carbonate and sodium sulfite, which have been conventionally required as essential components. That is, the inorganic alkali metal salt does not have a keratin swelling action, but it also causes a neutralization reaction with an organic acid having a keratin swelling promoting action in the composition or in a bath to give a keratin swelling promoting action of the organic acid. It also slows down the decomposition of the calcium salt of soap attached to the skin.

In the present invention, an organic acid and a saccharide are used as essential components of the bath agent. The organic acid is used to exert a swelling promoting action on the stratum corneum. As the organic acid in the present invention, any one can be used as long as it can be dissolved in a bath water, and examples thereof include citric acid, malic acid, tartaric acid, lactic acid, glycolic acid, succinic acid, oxalic acid and fumaric acid. To be These organic acids may be used alone or in combination of two or more.

Further, in the bath agent composition of the present invention,
When a saccharide is added, the saccharide has an effect of alleviating the sensation of irritation to the skin due to the addition of the organic acid. Therefore, when the organic acid is added and a saccharide is further added, the keratin swelling promoting action is excellent and the skin is excellent. A bath agent that can relieve the irritation to the skin is obtained. As the saccharide, any one can be used as long as it can be dissolved in a bath water, but a water-soluble non-reducing monosaccharide-trisaccharide or a monosaccharide-sugar alcohol obtained by reducing a trisaccharide is preferable. Examples thereof include sucrose, trehalose, sorbitol, maltitol and lactitol sugar. These may be used alone or in combination of two or more. These sugars are inactive and stable with respect to the reaction with the above-mentioned organic acid, and can be stably compounded with the fragrance and other bath additive components which will be described later.

The weight ratio of the organic acid to the sugar is 5/1.
˜1 / 5, preferably 3/1 to 1/3. If the usage ratio is less than 5/1, the keratin swelling promoting action is not sufficient, and if the usage ratio is more than 1/5, the skin feels sticky after bathing, which is not preferable. The concentration of the organic acid and the saccharide in the bath is such that the organic acid is 15 ppm or more, preferably 20 ppm or more.
ppm or more, and the saccharide content is 20 ppm or more, preferably 30 ppm or more. If the concentration of the organic acid is less than 15 ppm, the keratin swelling promoting action becomes insufficient, and if the concentration of the saccharide is less than 20 ppm, the stimulating action of the organic acid is not sufficiently exhibited.

In the bath composition of the present invention, in addition to the above-mentioned components, inorganic salts, crude drug powders, plant extracts, amino acids, etc. may be added, as long as the effects of the bath composition of the present invention are not impaired. Ingredients usually added to bath agents such as vitamins, fragrances, pigments, oils, fluidizing agents and the like can be added.

The dosage form of the bath agent of the present invention is not particularly limited,
It can be adjusted to a usual form such as powder or liquid, and a usual mixing method can be used.

[0014]

The reason why the bath composition of the present invention has the above-mentioned effects is not clear, but it is presumed as follows. In bath water that does not contain inorganic alkali metal salts, the calcium salt of soap that remains on the skin after soap washing is decomposed into fatty acids and calcium ions by organic acids, and the calcium ions are either dissolved in the bath water or captured as a chelate by the organic acid. Therefore, the swelling of the stratum corneum of the skin is promoted. Further, the organic acid penetrates deeper into the swollen stratum corneum to the skin damaged by rough skin and dryness, and the swelling action of the stratum corneum is sufficiently exerted, but the skin irritating action is also enhanced. In this regard,
Sugars protect the rough skin without impairing the keratin swelling promoting action of organic acids, and since they have the function of relieving the irritation of the skin by organic acids, the further addition of sugars makes the skin feel irritating to organic acids. It is thought to be alleviated.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments. The bath agent compositions of Examples and Comparative Examples having the compositions shown in Table 1 were prepared under the following conditions, and their performances were evaluated by the evaluation methods shown below. Table 1 shows the results. still,
The numerical value in each table is the blending weight%.

<Preparation of Sample Sample> Each component was uniformly mixed to obtain a sample sample.

<Evaluation Method> [1] Effect of Improving Skin Quality After soap washing, squeaky feeling of skin felt by adhesion of metal salt of soap and appearance of skin repelling hot water were observed, and how it was observed in sample bath Sensory evaluation of whether it changes,
The effect was to improve the skin after soap treatment. The evaluation method and evaluation criteria are as follows. Method: Put 40 ℃, 30 liters of hot water in a water tank, 3g of each sample
Dissolve the sample bath. Wash the forearm with soap and wash it with lukewarm water (tap water: 40 ℃).
Rinse thoroughly until the skin feels squeaky with a calcium hardness of 4). The forearm is immersed in the sample bath for 10 minutes, and changes in the feel of the skin and the repellency of hot water are evaluated. Evaluation Criteria ◎: The squeaky feeling of the skin disappeared quickly (within 3 minutes) and the skin became easy to wet ○: The squeaky feeling of the skin disappeared within 7 minutes, and the skin became easy to wet △: Within 10 minutes Did not change much at all x: did not change at all

[2] Keratin swelling effect Method: Dried pig skin (manufactured by Taiho Pharmaceutical Co., Ltd.) is sufficiently reconstituted with purified water, immersed in each sample bath (100 ppm, 40 ° C.) for 10 minutes, and the length of the pig skin before and after immersion The ratio of the obtained difference to the length before the sample bath was determined and used as the expansion coefficient to substitute for the keratin swelling effect. Evaluation criteria ◎: Expansion coefficient 10% or more ○: Expansion coefficient 7 to 10% △: Expansion coefficient 3 to 7% ×: Expansion coefficient 3% or less

[3] Sensation of irritation on the skin Method: 40 ° C., 30 l of hot water was placed in a water tank, and 3 g of each sample
Use as a melted sample. The forearm was degreased with acetone / ether (1: 1) and then immersed in a 1% SDS solution to create artificial rough skin. The forearm is soaked in the sample bath for 10 minutes, and the irritation feeling (irritation) of the skin is evaluated during and after the bathing by comparing with the hot water bath (blank). Evaluation criteria ◎: No irritation was felt at all (equal to or less than that of hot water) ○: Almost no irritation was felt △: Some irritation was felt ×: Clear irritation was felt

[4] Sensation of stickiness on the skin Water of 30 liters at 40 ° C. is placed in a water tank, and 3 g of each sample is melted to obtain a sample. After washing the forearm with soap, rinse it thoroughly and immerse it in the sample bath for 10 minutes. After the immersion, the cloth is lightly towel-dried, air-dried for 10 minutes, and the stickiness of the skin is evaluated by sensory evaluation. Evaluation Criteria ◎: There is no sticky feeling at all, and it is dry. ◯: There is no sticky feeling (equivalent to hot water). Δ: A little sticky is felt. X: Clearly sticky.

[0021]

[Table 1]

[0022]

The bath agent composition of the present invention does not contain an inorganic alkali metal salt and contains an organic acid and a saccharide in a specific ratio. Therefore, after the body wash with soap, which is generally performed at the time of bathing, the skin is removed. Effectively decomposes and removes calcium salts of soap remaining, has a high skin quality modification effect and keratin swelling promotion effect, and has a mild skin care effect even for people with rough skin without irritating the skin It is possible to impart a refreshing feeling without stickiness after bathing.

Claims (1)

[Claims] 1. A bath agent composition containing no inorganic alkali metal salt, containing a saccharide and an organic acid, wherein the weight ratio of the saccharide and the organic acid is 1/5 to 5/1. A featured bath agent composition.