JPH10291924A - Skin cosmetic for wet skin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject cosmetic capable of keeping refreshing skin sensation and not causing adhesion to clothing by including spherical powder having an average particle diameter in a specific range, an oily substance having specific physical properties and water. SOLUTION: This cosmetic not causing whitening of applied parts is obtained by including (a) 1-40 wt.% spherical powder having 1-20 μm average particle diameter, (b) 1-20 wt.% oily substance having <=30 dyn/cm surface tension at 25 deg.C and <=200 cst viscosity at 25 deg.C [in a weight ratio of the components (a)/(b) of (1/10) to (10/1)] and (c) water in an amount of 0.5-100 times by weight based on total amount of the components (a) and (b) and as necessary, (d) 1-40 wt.% planar, scaly or amorphous powder and (e) 0.01-2 wt.% aqueous polymer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cosmetic for wet skin which gives a skin care effect to water-wet skin, and more particularly, it is applied directly to wet skin after bathing or showering and, if necessary, water. The present invention relates to a skin cosmetic for wet skin that gives a long-term skin care effect to the skin after rinsing with water.

[0002]

2. Description of the Related Art Conventionally, skin cosmetics that have been used after bathing or after showering include nutritional creams containing oily components, skin care agents such as lotions containing natural moisturizing oils and glycerin, and inorganic substances such as talc and kaolin. Examples of such agents include powders, powders having an antiperspirant action and an astringent action, and the like, which enhance the feel to the skin (giving the skin a dry feeling). None of these skin cosmetics was developed for the purpose of imparting skin care effect to the skin after bathing or showering, but when used after bathing or showering, it has the effect of enhancing the skin care effect and skin feel. It has been used since ancient times.

[0003]

However, although a nutritional cream containing an oily component, a lotion containing a natural moisturizing oil, and glycerin have a high moisturizing effect on the skin, they have a sticky property on the skin when sweating. Notably, use in the summer was not comfortable. In addition, when powdered inorganic powders such as talc and kaolin and powders having an antiperspirant action and an astringent action are applied to the skin after bathing, it absorbs sweat and gives a dry feeling to the skin, which is highly effective in preventing hot flashes and the like. Have been. However, these powder preparations have a problem in use because the powder soars when the powder is pressed into the skin, so that the powder may enter the lungs or enter the eyes during inhalation. Was. In addition, such a powder formulation has a problem that after application, it easily falls off the skin due to perspiration or washing with water.

[0004] Therefore, a product has been put on the market in which the powder is prevented from rising by adding water to the powder to make a liquid powder or blending it into a cream or ointment. But,
When using these products, the application site often becomes white, the formulation often adheres to clothing,
Usage problems remain.

[0005] Therefore, the present invention does not whiten the application site, does not adhere to clothing, does not easily fall off the skin even by washing with water, and provides a refreshing skin feeling even under high humidity after showering or bathing. An object of the present invention is to provide a skin cosmetic for wet skin that is maintained.

[0006]

In view of such circumstances,
The present inventors have conducted intensive studies in order to achieve the above object, and as a result, a cosmetic containing a spherical powder having an average particle diameter of 1 to 20 μm, an oily substance having specific physical properties, and water, after bathing or after showering. In the case of applying to wet skin and drying as it is, towel drying after application, or washing off with bath water or shower water after application, the powder in the cosmetic adheres to the skin, For this reason, it has been found that a refreshing skin sensation such as a dry feeling on the skin can be maintained, and that the application site does not whiten or adhere to clothing, and the present invention has been completed.

That is, the present invention provides the following components (a) to
(C): (a) 1 to 40 spherical powders having an average particle size of 1 to 20 μm
Weight%, (b) the surface tension at 25 ° C. is 30 dyn / cm
The present invention provides a skin cosmetic for wet skin containing 1 to 20% by weight of an oily substance having a viscosity of not more than 200 centistokes (cs) at 25 ° C and (c) water.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The skin cosmetic for wet skin of the present invention comprises:
After being applied to the skin, it can be washed with water or hot water. Conventionally, soap, liquid soap, shampoo, rinse agent, etc., at the time of use, after applying the preparation to the body or sponge, towels, etc. These formulations are intended to remove body stains by positively incorporating a surfactant, and to change the skin feel by adding a cationic compound to the skin, whereas powders The cosmetic of the present invention for the purpose of adhering the body to the skin is not intended for cleaning, is substantially free of a surfactant intended for cleaning, and is essentially completely different.

In the present invention, a spherical powder is used as the powder. Thereby, when the skin cosmetic is applied, the elongation is good and a dry feeling can be imparted. Such effects are remarkable when the cosmetic of the present invention is applied to wet skin such as at the time of perspiration or bathing.

In the present invention, the term "spherical powder" refers to a powder having a substantially spherical shape, and does not need to be perfectly spherical. Usually, spherical powders composed of organic synthetic polymers obtained by suspension polymerization or the like can be used. Examples of the material of the spherical powder include silicone resin powder, silicone rubber powder, polyamide, nylon, polyester, polystyrene, polyethylene, polypropylene, polytetrafluoroethylene, polyvinyl chloride, polyurethane, acrylic acid or acrylate polymer, and methacrylic acid. Alternatively, a methacrylate polymer, an ethylene / acrylic acid copolymer, an acrylic acid / styrene copolymer, a styrene / divinylbenzene copolymer, a vinyl resin, a polycarbonate resin, a cellulose resin, and the like can be given.
Among these, silicone resin powder is particularly preferred from the viewpoint of imparting good stretchability and smooth feeling when applied to the skin.

When the particle size of the spherical powder is too small, the smear tends to be strong, and when it exceeds 20 μm, the roughness tends to be generated. Therefore, the average particle size must be 1 to 20 μm. It is preferably 1 to 10 μm. The particle size of the spherical powder can be measured using a laser diffraction / scattering particle size distribution analyzer, an electron microscope, or the like.

The amount of the spherical powder in the skin cosmetic for wet skin of the present invention must be 1 to 40% by weight, preferably 1 to 15% by weight. 1 amount
By adjusting the content to 40% by weight, a refreshing skin feel such as a dry feeling can be imparted to the skin.

The oily substance used in the present invention has a surface tension at 25 ° C. of not more than 30 dyn / cm and a temperature of 25 ° C.
Is less than 200 centistokes (cs). By incorporating an oily substance having such physical properties, the spherical powder can be easily attached to the skin, hardly fall off even by washing with water or the like, and a refreshing skin feeling can be maintained. Examples of such oily substances include silicone oils. Specific examples include methylpolysiloxane, dimethylpolysiloxane, methylcyclopolysiloxane, diethylpolysiloxane, methylphenylpolysiloxane, fatty acid-modified polysiloxane, and higher alcohol-modified polysiloxane. And amino-modified polysiloxane. Among them, methyl polysiloxane, dimethyl polysiloxane and methyl cyclopolysiloxane are particularly preferred.

The amount of such an oily substance in the skin cosmetic for wet skin of the present invention must be 1 to 20% by weight, preferably 2 to 10% by weight. With such an amount, the spherical powder easily adheres to the skin, becomes hard to be dropped even by washing with water, etc., and can maintain a refreshing skin sensation.

The mixing ratio (weight ratio) of the spherical powder to the oily substance is preferably 1/10 to 10/1, and particularly preferably 1/1 to 5/1. When the compounding ratio is 1/10 to 10/1, the above effect is further improved.

In the present invention, water is used to disperse the above-mentioned spherical powder and oily substance, and it is usually preferable to mix the powder in an amount of 0.5 to 100 times by weight based on the total amount of the spherical powder and the oily substance. , 1 to 25 times by weight.

In the present invention, it is preferable to add 1 to 40% by weight, more preferably 1 to 20% by weight, of a plate-like, scale-like or amorphous powder. 1 to 40 of flat, scaly or irregular shaped powder
By blending by weight%, when applied to wet skin at the time of bathing, etc., the elongation becomes good and the refreshing skin feeling is further improved. In addition, the sweat that has been sweated can be spread and the skin can be efficiently kept dry.

Examples of the flat, flaky or amorphous powder include talc, calcium carbonate, sepiolite, clay, bentonite, titanium oxide, mica, antimony trioxide, sericite, magnesium carbonate, zinc oxide, kaolin and the like. Preferred examples thereof include talc and kaolin.

In the present invention, it is preferable to further incorporate a water-soluble polymer as a dispersant. As a result, the spherical powder, the oily substance, and the like are uniformly dispersed and stably present in the skin cosmetic for wet skin at a specific concentration (a low concentration and a high concentration that is easy to use), and the usability is improved.

Examples of the water-soluble polymer include carbopol, polyacrylic acid, sodium polyacrylate, hydroxycellulose, methylcellulose, hydroxymethylcellulose, cationized cellulose, polyvinylpyrrolidone, polyvinyl alcohol, cationized polyvinylpyrrolidone, and acrylic acid. / Alkyl methacrylate copolymer, crystalline cellulose and the like. Among them, carbopol, acrylic acid / alkyl methacrylate copolymer, carboxymethyl cellulose, crystalline cellulose and the like are preferable. The amount of the water-soluble polymer in the skin cosmetic for wet skin is preferably 0.01 to 2% by weight, and particularly preferably 0.01 to 1% by weight.

The skin cosmetic for wet skin of the present invention can be produced by mixing the above components according to a conventional method.

The skin cosmetic for wet skin of the present invention is characterized by the method of directly applying it on wet skin, but it can provide a dry skin feel even when used on dry skin.
However, in this case, the agent cannot be applied over a wide area, and the powder partially adhered to the skin may remain white or the powder may adhere to clothing.

The method of using the skin cosmetic for wet skin of the present invention includes a method of applying it to wet skin after bathing or showering, preferably applying it to the body and then drying it as it is, a method of applying it to wet skin and then drying it with a towel After application, it is preferable to use a method of rinsing with bath water or shower water and towel drying. The skin cosmetic for wet skin of the present invention is characterized in that spherical powder specifically adheres to swollen keratin after bathing or showering, and is used on wet skin, so that a small amount of coating is applied to the whole body. Spreads, the powder does not detach from the skin when it is dried as it is or when dried with a towel, and a sufficient amount of powder remains on the skin even when it is washed with bath water or shower water. A long-lasting skin sensation can be given to the skin for a long time. In addition, by blending moisturizing ingredients, anti-inflammatory agents, whitening agents, UV care agents, bactericides, antiperspirants, cooling agents, fragrances, etc., it is possible to functionally condition the skin after bathing and after showering. You can also enjoy the hydration, refreshing sensation and aroma.

The skin cosmetic of the present invention contains an alcohol, a moisturizing component, an anti-inflammatory agent, a whitening agent, a UV care agent, a bactericide, an antiperspirant, a fragrance, etc. as long as the effects of the present invention are not impaired. be able to.

Preferred examples of the alcohol include ethyl alcohol, propylene alcohol, 1,3-butylene alcohol, glycerin, sorbitol and the like. These may be used alone or in combination of two or more. You may. Glycerin,
Lactic acid, ceramide, cholesteryl ester and the like can be mentioned. Examples of the anti-inflammatory agent include glycyrrhizinate, β-glycyrrhetinic acid, allantoin, indomethacin, guaiazulene, guaiazulene sulfonate and the like. Vitamin C derivatives (eg magnesium ascorbate phosphate), arbutin, kojic acid, chamomile extract, Versol MC as whitening agents and UV care agents
X, escalol 507, oxybenzone, ubinal and the like. Fungicides include benzalkonium chloride, benzethonium chloride, triclocarbamide, cetylpyridinium chloride, isopropylmethylphenol and the like. Examples of antiperspirants include aluminum chloride, chlorohydroxyaluminum, aluminum lactate, allantoin aluminum derivatives, zinc p-phenolsulfonate, and the like.

[0026]

Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to the following examples.

Examples 1 to 9 and Comparative Examples 1 to 4 The components shown in Tables 1 to 4 were mixed using a homomixer.
Purified water was added to this to make up to 100 parts by weight to prepare a skin cosmetic. Comparative Example 3 was a powder because no purified water was added. The obtained cosmetics were used by 100 men and women aged 20 to 40 years in the following manner, and the feeling of use was evaluated according to the following evaluation criteria. The evaluation result is shown by the number of people.

(How to use) Apply to wet skin after shower, wash with water and dry with towel.

(Evaluation items) Ease of application Towel dryness (easiness of wiping off water droplets) Skin feel after towel dry (smoothness) ○: good △: slightly bad ×: bad

Adhesion of powder to skin (whether it looks white) Adhesion of powder to clothing Soaring of powder ○: No △: Somewhat ×: Yes

Redispersibility ：: Powder hardly settles in container ○: Powder is easily dispersed by shaking container △: Powder is dispersed by shaking container ×: Powder settles and solidifies End up

[0032]

[Table 1]

[0033]

[Table 2]

[0034]

[Table 3]

[0035]

[Table 4]

From Tables 1 to 4, it was confirmed that all of Examples 1 to 9 were superior to Comparative Examples 1 to 4 in all items.

[0037]

EFFECT OF THE INVENTION In the skin cosmetic for wet skin of the present invention, spherical powder adheres effectively to wet skin, and the powder sufficiently remains on the skin even after removal of water droplets, and the powder remains for a long time. It gives the skin a moderate skin sensation.
The formulation does not adhere to clothing. In addition, the redispersibility of the preparation was enhanced by the incorporation of a water-soluble polymer, and a product having a good feeling in use was obtained.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuhiko Takeuchi 2-1-3 Bunka, Sumida-ku, Tokyo Inside Kao Co., Ltd. Laboratory (72) Inventor Shuichi Tsuchiya 2606 Kabane-cho, Akabane, Haga-gun, Tochigi Kao Co., Ltd. In the laboratory

Claims (6)

[Claims] 1. The following components (a) to (c): (a) spherical powder 1 to 40 having an average particle size of 1 to 20 μm
Weight%, (b) the surface tension at 25 ° C. is 30 dyn / cm
A skin cosmetic for wet skin containing 1 to 20% by weight of an oily substance having a viscosity of not more than 200 centistokes (cs) at 25 ° C and (c) water. 2. The weight ratio of component (a) to component (b) is 1
The skin cosmetic for wet skin according to claim 1, which is / 10 to 10/1. 3. The skin cosmetic for wet skin according to claim 1, further comprising component (d): 1 to 40% by weight of a flat, scaly or amorphous powder. 4. Component (e): water-soluble polymer in an amount of 0.0
The skin cosmetic for wet skin according to any one of claims 1 to 3, which contains 1 to 2% by weight. 5. The skin cosmetic for wet skin according to any one of claims 1 to 4, which is used by applying it to water wet skin and then drying it. 6. The method according to claim 1, wherein the composition is applied to skin wet with water, rinsed with water, and then dried.
The skin cosmetic for wet skin according to any one of claims 1 to 4.