JPH08319230A - Skin care bath agent - Google Patents

Abstract

PURPOSE: To obtain a new skin care bath agent preventing skin roughness, mild for skin, and not causing the reduction in the water content of corneum, even when the cortex on the surface of the skin is reduced due to the washing of the skin. CONSTITUTION: This bath agent contains as a main ingredient a moisture- retaining agent comprising the reaction product of hydrolyzed collagen with chitosan modified with a carboxylic acid, and further suitably contains a silver ceramic agent.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention has an adsorptive coating property on the skin,
The present invention also relates to a skin care bath agent containing a smooth moisturizer. The present invention also relates to a skin care bath agent containing a moisturizing agent which is a reaction product of carboxylic acid-modified chitosan and hydrolyzed collagen, and optionally a silver ceramic antibacterial agent as an additional component.

[0002]

2. Description of the Related Art Conventional bath agents contain inorganic salts such as sodium sulfate, sodium carbonate, sodium hydrogencarbonate, borax, etc. as a main ingredient, and also a mineral component and a carbon dioxide gas generating component, and an appropriate amount of fragrance or coloring agent. In addition, many people said that bathing enhances the effect of warm bathing, improves blood circulation, and is effective for relieving fatigue, stiff shoulders, coldness, neuralgia, and back pain. In addition, by adding titanium oxide to the bath agent, a bath agent for the feeling of a milk bath, herbs and herbal medicine powder,
In some cases, non-fat dry milk was added to indicate "kindness to the skin" and sometimes its medicinal effect. On the other hand, the use form of the bath agent includes a powder form, a tablet form, and a paste form, and it is common to dissolve the required amount in a bath at the time of bathing. Further, among commercially available bath agents, many of the products correspond to quasi-drugs, which have effects such as coldness, rheumatism, stiff shoulders, neuralgia, back pain, blood circulation improvement, and fatigue recovery. In addition, cosmetics that are effective for cleansing and cleansing the skin are also on the market, but the indication of medicinal effects on the body such as hot spring effect is not recognized, and the range of usable compounds is narrow. The current situation is that the number of bath agents that are overwhelmed by external products and are included in the category of cosmetics is decreasing.

[0003]

[Problems of the prior art] With conventional bath agents, it is explained that the blood circulation improves and the fatigue is healed, and the effects of coldness, rheumatism, stiff shoulders, etc. are explained. Since the oil on the skin surface is removed during removal, it is necessary to care for the skin with a cosmetic oil or moisturizer after bathing, especially for those with rough skin and weak skin. This is because the sebum on the skin surface plays an important role in maintaining keratin water, and when sebum decreases due to bathing, the evaporation suppression ability of keratin water decreases thereafter, and water decreases over time, so skin health is improved. As was not desirable. In order to keep the skin in a healthy state, it is necessary for the keratin to contain about 20% of water, and when the water content of the keratin decreases, the flexibility of the skin is lost and the skin becomes rough. For this reason, when sebum is lowered by taking a bath, it is difficult to maintain the water content of keratin, and the skin is often roughened, and symptoms are often aggravated in atopic diseases and allergic diseases. As a countermeasure against this, body lotion using castor oil, glycerin, etc. was performed after bathing, but it requires labor to apply the body lotion, it is complicated, and the skin feels sticky, and it is not preferred. There wasn't. If a bathing agent simultaneously provides a skin-protecting effect, the need for care by a body lotion after bathing becomes unnecessary, which is convenient, but no product that meets such needs has been developed.

[0004]

Further, if a bathing agent provides a smooth and soft moisturizing effect, not only for people with weak skin or people with atopic or allergic diseases, but also for general people. It is effective and convenient for the skin health of
Castor oil, which was conventionally used for body lotions,
When glyphorin or the like was added to the bath agent, the feeling after use was sticky and not suitable. There are also known products that require moisturizing skin care by blending skim milk powder into a bath agent, but problems such as stickiness due to moisture absorption of skim milk, easy removal without adsorption to the skin, unstable and easy deterioration was there. In addition, as a moisturizing skin care product, there is a cosmetic containing carboxymethyl chitosan and collagen (Japanese Patent Laid-Open No. 6-279231), which has excellent moisturizing ability due to the synergistic effect of carboxymethyl chitosan and collagen, but does not have hygroscopicity. Since it is strong, it is not suitable as a bath agent as it leaves sticky skin. Further, since these moisturizers have weak film-forming covering power, the moisturizing protective effect was not sufficient under severe conditions such as low temperature and low humidity conditions and rubbing of the skin. Therefore, in order to address this problem, the present invention aims to provide skin care for preventing skin roughness, and provides a new skin care bath agent that does not cause a decrease in water content of keratin even if sebum on the skin surface is reduced by washing. is there.

[0005]

According to the present invention, chitosan is modified to be water-soluble with a carboxylic acid, and a reaction product of chitosan and hydrolyzed collagen is used as a moisturizer to have smoothness which has adsorptivity to skin. A film-forming coating having a certain property is obtained, and this coating has a high moisturizing property, and due to its moisturizing power and coating effect, it has an effect of maintaining keratin moisture even under severe conditions. Further, since this moisturizing agent has adsorptivity to the skin, it is possible to further enhance the effect by blending it with a bath agent. Further, since the moisturizing agent of the present invention has adsorptivity to the skin, it is not removed by washing and is most suitable for moisturizing with smoothness and flexibility. In addition, the bath agent of the present invention provided refreshing smoothness and excellent moisturizing properties, and was able to eliminate stickiness caused by conventional moisturizing agents. The adsorption of this moisturizer to the skin makes it possible to more effectively adsorb and coat the skin with the bath. The bath agent of the present invention is, of course, effective for the health management of human skin of general constitution, but is particularly effective for maintaining the skin health of people with dry skin roughness, atopic diseases and allergic diseases. Is.

The moisturizing agent in the present invention is prepared by mixing chitosan with carboxylic acid, optionally adding water and stirring at 20 to 50 ° C. for 4 to 8 hours, and then adding hydrolyzed collagen and stirring. A moisturizer is obtained.
It may be mixed with sodium carbonate or the like as appropriate and molded into a tablet. To obtain a powdery moisturizer, chitosan and hydrolyzed collagen are mixed uniformly, put in the upper part of a steamer with two layers inside, and carboxylic acid is put in the lower part to close and heat chitosan. Of the carboxylate of
The action of hydrolyzed collagen on this can be performed by a gas phase method. Furthermore, in order to prevent the decomposition of hydrolyzed collagen contained in the moisturizer, the addition of a silver ceramic antibacterial agent is effective in terms of the sustainability of the action.
As the carboxylic acid for modifying chitosan, at least one component selected from the group consisting of ascorbic acid, citric acid, lactic acid, malic acid and adipic acid can be used. In the present invention, the moisturizer is used as a main agent of a bath agent for skin care, but even if the moisturizer is added to a conventional bath agent having an inorganic salt as a main agent, it is compared with a case where it is added as a main agent. Although there are some differences in the effects, similar effects are exhibited.

[0007]

Example 1 500 g of powdered chitosan, 500 lactic acid
g and 200 g of water were mixed and stirred at 40 ° C. for 5 hours, then 600 g of hydrolyzed collagen was added and stirred at 30 ° C. for 3 hours to obtain a moisturizing agent. 30 parts of the above moisturizing agent, 58 parts of sodium carbonate, 7 parts of vitamin C, 2 parts of vitamin E and 3 parts of silver zeolite were mixed and kneaded to form a bath agent of 25 g each. One 25 g was put into a 200 L bath and dissolved. Bathing in this bath resulted in the formation of a silky, moisturizing coating with excellent smoothness and made the skin soft.
As a result of taking this bath every day, the skin became less rough one week later.

[0008]

[Example 2] 500 g of powdered chitosan and 500 g of hydrolyzed collagen were uniformly mixed and placed in the upper part of the inside of a two-layer steamer, 600 g of lactic acid was placed in the lower part, and the mixture was sealed and heated at 150 ° C for 3 hours. Thus, a powdery chitosan / collagen moisturizer was obtained. 25 g of a mixture obtained by mixing 25 parts of the powdery moisturizing agent, 40 parts of titanium oxide, 6 parts of vitamin C, 2 parts of vitamin E, 25 parts of sodium carbonate and 2 parts of silver zeolite was put in a 200 L bath and dissolved. After bathing in this bath, the rough skin became smooth and soft, and the skin was soft on the next day due to the moisturizing coating. The performance of this moisturizer was able to maintain the same effect even after 6 months.

Claims (3)

[Claims] 1. A skin care bath agent containing a moisturizing agent comprising a reaction product of chitosan modified with carboxylic acid and hydrolyzed collagen. 2. The skin care bath preparation according to claim 1, wherein the carboxylic acid for modifying chitosan is at least one component selected from the group consisting of ascorbic acid, citric acid, lactic acid, malic acid and adipic acid. 3. A skin care bath agent according to claim 1, which contains a silver ceramic antibacterial agent.