JP3696873B2 - Water based skin cosmetics - Google Patents

Description

  The present invention relates to a skin cosmetic that provides skin care effects on the skin, more specifically, when applied to wet skin after bathing or after showering, or applied to wet skin after bathing or after showering, The present invention relates to a water-based skin cosmetic that gives a skin care effect to the skin for a long time when used after being washed away.

Conventional skin cosmetics used after bathing or after showering include skin care agents such as nutritional creams containing oily ingredients, lotions containing natural moisturizing oil and glycerin; inorganic powders such as talc and kaolin, antiperspirants There are agents that enhance the skin feel (provide a dry feeling to the skin) such as powders that have an action and a convergence action. None of these skin cosmetics were developed for the purpose of giving skin care effects to the skin after bathing or after showering, but when used after bathing or after showering, skin care effects and skin touching effects are obtained. It has been used since ancient times.
However, although nutritional creams containing oily ingredients, natural moisturizing oils, and lotions containing glycerin have a high moisturizing effect on the skin, they are very sticky on the skin when sweating, etc. It couldn't be said. In addition, when powdered with inorganic powders such as talc and kaolin and antiperspirant and astringent powders are applied to the skin after bathing, it absorbs sweat and gives the skin a feeling of dryness. Has been. However, these powder preparations have a problem in use, because the powder soars when it is dusted onto the skin, and the powder may enter the lungs or enter the eye during inhalation. It was.
In view of this, products that suppress the rising of the powder by adding water to the powder to form a liquid powder or by blending it into a cream or ointment are on the market. However, when these products are used, the application site often turns white, or the preparation adheres to clothing, and problems in use remain.

  Accordingly, an object of the present invention is to provide a skin cosmetic containing powder that does not soar in use, does not whiten the application site, and adheres to clothing.

  In view of such circumstances, the present inventor has conducted intensive studies. As a result, water-based skin cosmetics in which a water-insoluble powder having an average particle size of 0.1 to 50 μm is dispersed in water are obtained after bathing or after showering. When it is applied to wet skin and dried as it is; towel drying after application, washing with bath water or shower water after application, powder in cosmetics is adsorbed to the skin, For this reason, it has been found that the skin feels smooth and the like. Further, it has been found that if an oily substance is added to this water-based skin cosmetic, the skin care effect is improved, and the powder soars, whitening of the application site, adhesion to clothing, etc. can be further prevented. Furthermore, it has been found that if a cooling sensation agent is added to this water-based skin cosmetic, not only a refreshing feeling can be obtained but also the refreshing feeling can be sustained dramatically for a long time. Furthermore, it has been found that if a thickener is added to this water-based skin cosmetic, the dispersion stability of the powder is improved and it is easy to apply uniformly to the skin, and the touch when applied is further improved. .

That is, the present invention includes the following components (A) to (D):
(A) 5 to 60% by weight of a water-insoluble powder having an average particle size of 0.1 to 50 μm,
(B) an oily substance having a weight ratio of 0.1 to 1 with respect to the component (A),
(C) l-menthol or a derivative thereof,
(D) An aqueous skin cosmetic containing 0.4 to 100 times as much water as the component (A) is provided.
Furthermore, the present invention provides the water-based skin cosmetic composition further containing a thickener.

Furthermore, the present invention provides a skin care method for a body, wherein the water-based skin cosmetic is applied to skin wet with water and then towel-dried.
Furthermore, the present invention provides a skin care method for a body characterized in that the above-mentioned aqueous skin cosmetic is applied to skin wet with water, rinsed with water, and then towel-dried.

  The water-based skin cosmetic of the present invention can be washed off after being applied to the skin. Conventionally, there are soaps, liquid soaps, shampoos, conditioner agents, etc. that are washed away after application, but these preparations are formulated with a purpose of positively adding a surfactant to cleanse the body and a cationic compound. The cosmetics of the present invention for the purpose of adsorbing powder to the skin are not intended to be washed, but are intended to be washed. Are substantially different and are essentially completely different.

  The water-insoluble powder used in the present invention is not particularly limited as long as it is usually blended in cosmetics. For example, talc, sericite, mica, kaolin, bengara, clay, bentonite, silicic acid, anhydrous Silica, Magnesium silicate, Mica, Magnesium oxide, Zinc oxide, Titanium oxide, Aluminum oxide, Aluminum sulfate, Alum, Calcium sulfate, Barium sulfate, Magnesium sulfate and other inorganic powders, Polyamide, Polyester, Polyethylene, Polypropylene, Polystyrene, Examples thereof include organic powders such as ethylene / acrylic acid copolymer, styrene / acrylic acid copolymer, polyurethane, vinyl resin, polycarbonate resin, nylon, silk, cellulose resin, silicone resin, and polyacrylic acid. Among these, talc, sericite, mica, kaolin, and silicone powder are particularly preferable for the water-based skin cosmetic of the present invention because they have a feeling on wet skin and a feeling after towel drying.

  The shape of the powder is not particularly limited, and may be any of a plate shape, a lump shape, a scale shape, a spherical shape, and the like, but a plate shape, a scale shape, a spherical shape, and the like are more preferable for enhancing skin feel. .

  In order to improve the feeling of use, the powder having an average particle size of 0.1 to 50 μm is used, and an average particle size of 1 to 20 μm is particularly preferable. When the average particle size is less than 0.1 μm, the skin is not smooth, and when the particle size is more than 50 μm, the effect of the present invention is impaired since the surface is rough.

  The blending amount of these powders is preferably 1 to 60% by weight (hereinafter simply expressed as%) in the cosmetic of the present invention, 5 to 60% is more preferable from the viewpoint of use feeling, and 5 to 25% is particularly preferable. preferable.

  In the present invention, it is preferable to use a combination of a spherical powder and a plate powder as the powder. Thereby, when the skin cosmetic is applied, the elongation is good, and a smooth feeling can be imparted even in a high temperature and high humidity environment. Such an effect becomes prominent when the cosmetic of the present invention is applied to wet skin such as when sweating or bathing. That is, when a cosmetic containing a spherical polymer powder alone, which has good elongation and a smooth feel, is used, the effect is not always sufficient when applied to wet skin. By blending both spherical powder and plate-like powder in combination, excellent elongation and smoothness can be imparted even when applied to wet skin.

In the present invention, the spherical powder means a powder having a substantially spherical shape, and does not need to be a perfect spherical shape. Spherical powder materials include silicone powder, nylon, polystyrene, polyethylene, polypropylene, polytetrafluoroethylene, polyvinyl chloride, acrylic acid or acrylate polymer, methacrylic acid or methacrylic acid ester polymer, acrylic acid / styrene Examples thereof include a copolymer and a styrene / divinylbenzene copolymer. Among these, silicone powder is particularly preferable in terms of imparting good elongation and a smooth feeling when applied to the skin together with the plate-like powder.
Silicone powder is powdered silicone resin or silicone rubber, and has a substantially spherical shape. There are no particular restrictions on the type of organopolysiloxane, the filler, the curing agent, the molar ratio of the organic group to silicon, etc., as long as the silicone resin is powdered. Examples of commercially available silicone powders include Tospearl (Toshiba Silicone), Trefil (Toray Dow Corning), and Silicon Powder (Shin-Etsu Chemical).

  The plate-like powder refers to a plate-like or rod-like powder, and examples thereof include talc, sericite, kaolin, and magnesium silicate. Of these, talc is particularly preferable in that it provides good elongation and a smooth feeling when applied to the skin together with the spherical powder.

  The blending ratio (weight ratio) of the spherical powder and the plate-like powder sufficiently improves the good elongation and the smooth feeling, and from the viewpoint of the smooth feeling in a high temperature and high humidity environment, 20: 1 to 1: 20 is preferable, 10: 1 to 1:10 is particularly preferable, and 5: 1 to 1: 5 is most preferable.

  Even if it is a case where spherical powder and plate-shaped powder are used together, this invention cosmetics can also mix | blend powder of another shape. Of the total powder blending amount, the spherical powder and the plate-like powder preferably occupy 50 to 100%, particularly 60 to 100%.

  In the cosmetic of the present invention, it is preferable that the powder is basically dispersed in water, and the amount of water added is 0.4 to 100 times by weight, especially 0.5 -50 weight times is preferable.

  In the present invention, the particle size of the powder can be measured using a microscope, and the particle size of the plate-like powder is the length of the longest part of the powder.

The skin cosmetic of the present invention can further contain an oily substance for the purpose of imparting a moist feeling to the skin, and the oily substance is not particularly limited as long as it is liquid at room temperature, Avocado oil, camellia oil, turtle oil, corn oil, olive oil, wheat germ oil, soybean oil, jojoba oil, peanut oil, cocoa butter, lanolin, liquid paraffin, squalane, squalene, petrolatum, cholesteryl ester And silicone oil are preferable examples.
In addition, in order to enhance the feeling of use, especially the moisture wiping effect when towel drying when used on wet skin and the sweat wiping effect when sweating, an oily substance having a surface tension of 30 dyn / cm or less at 25 ° C. It is more preferable to mix 1 type or 2 types or more. Examples of such oily substances include silicone oils. Specifically, methylpolysiloxane, dimethylpolysiloxane, methylcyclopolysiloxane, diethylpolysiloxane, methylphenylpolysiloxane, fatty acid-modified polysiloxane, higher alcohol-modified polysiloxane. And amino-modified polysiloxane. Among these, methylpolysiloxane and dimethylpolysiloxane are particularly preferable, and those having a viscosity at 25 ° C. of 200 centistokes (cs) or less are particularly preferable from the viewpoint of enhancing the feeling of use.
The oily substance having a surface tension of 30 dyn / cm or less is preferably added in an amount of 0.1 to 20%, particularly preferably 1 to 10%, in the total composition.

  The blending ratio of these oily substances and the powder is preferably 1:20 to 20: 1 in terms of weight ratio from the viewpoint of usability in a high temperature and high humidity environment, and increases the residual rate of the powder on the skin. To 1: 1 to 1:10 are particularly preferred.

In the present invention, as described above, when a cooling sensation agent is added, not only a refreshing feeling can be obtained when the cosmetic is applied to the skin, but the refreshing feeling lasts for a long time.
The cooling sensation agent used in the present invention is not particularly limited as long as it does not give irritation or stickiness when it is mixed with the aqueous skin cosmetic of the present invention and applied to the skin, and the refreshing feeling lasts for a long time. However, l-menthol and derivatives thereof (for example, menthyl lactate, menthyl acetate, menthone, etc.), light cargo oil, camphor and the like are preferable, and l-menthol and derivatives thereof are particularly preferable.

The blending amount of the cooling sensation agent is preferably 0.05 to 5% by weight, particularly 0.07 to 1% by weight, in the aqueous skin cosmetic of the present invention, in order to sufficiently impart a refreshing feeling to the skin. Preferably, it is 0.1 to 0.5% by weight.
The blending ratio (weight ratio) between the water-insoluble powder and the cooling sensation agent is preferably 200: 1 to 10: 1 in order to keep the cooling sensation by the cooling sensation for a long time, and 180: 1 to Particularly preferred is 40: 1.

In the present invention, by adding a thickener, the dispersion stability of the powder is improved, the applicability when applied to the skin is improved, and the feel is also improved. Examples of the thickener include (meth) acrylic acid / (meth) alkyl acrylate copolymer; (meth) acrylic acid-based polymer (carboxyvinyl polymer, etc.); methacrylic acid / acrylic acid copolymer; guar gum, xanthan gum, Examples thereof include polysaccharides such as methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose or derivatives thereof; other water-soluble polymers such as polyvinyl alcohol. Of these, (meth) acrylic acid / (meth) acrylic acid alkyl copolymers are particularly preferred. The (meth) acrylic acid / (meth) acrylic acid alkyl copolymer has a function as an emulsifier in addition to a function as a thickener. In general, nonionic surfactants and cationic surfactants are used as surfactants to be blended in cosmetics, but the stickiness increases when these are used. On the other hand, when a (meth) acrylic acid / (meth) acrylic acid alkyl copolymer is used, it is possible to obtain a smooth feeling without being sticky. In addition, by using this (meth) acrylic acid / (meth) acrylic acid alkyl copolymer, a stable emulsion can be formed without using a nonion, a cationic surfactant, etc. Can be formed.
The (meth) acrylic acid / (meth) acrylic acid alkyl copolymer used in the present invention has the following formula (1):

(In the formula, R represents an alkyl group having 10 to 30 carbon atoms, X and Y represent mol% of each unit in the copolymer, X = 80.0 to 99.9 mol%, Y = 0. A copolymer having a structure of 1 to 20.0 mol% is preferred. As such a copolymer, a commercially available product can be used. F. Examples include PEMULEN TR-1 and PEMULEN TR-2 manufactured by Goodrich. These may be used alone or in combination of two or more. Of these, acrylic acid / alkyl methacrylate copolymers are particularly preferred.

  The blending amount of the thickener in the cosmetic of the present invention is preferably 0.01 to 5%, more preferably 0.01 to 2% from the viewpoint of dispersion stability of the powder and feel to the skin.

  Alcohols can be further blended in the cosmetic of the present invention. Examples of alcohols include ethyl alcohol, propylene glycol, 1,3-butylene glycol, glycerin, sorbitol and the like, and these may be used alone or in combination of two or more. . The blending amount of these alcohols is preferably from 0.01 to 60%, particularly preferably from 0.1 to 20%, from the point of use feeling.

Furthermore, physiologically effective moisturizing ingredients, anti-inflammatory agents, whitening agents, UV care agents, bactericides, antiperspirants, fragrances and the like can also be blended with the cosmetics of the present invention. Examples of the moisturizing component include glycerin, lactic acid, ceramide, cholesteryl ester and the like. The blending amount of the humectant is preferably 0.1 to 40% in the cosmetic composition of the present invention, and preferably 1 to 10% from the point of use feeling.
Examples of the anti-inflammatory agent include glycyrrhizinate, β-glycyrrhetinic acid, allantoin, indomethacin, guaiazulene, guaiazulene sulfonate, herbal extract and herbal extract. The blending amount is preferably 0.01 to 10% in the cosmetic of the present invention, and particularly preferably 0.1 to 2% from the viewpoint of the effect.
Examples of whitening agents and UV care agents include vitamin C derivatives (such as magnesium ascorbate phosphate), arbutin, kojic acid, chamomile extract, Versole MCX, Escalol 507, oxybenzone, and ubinal. The blending amount is preferably 0.01 to 10% in the cosmetic of the present invention, and particularly preferably 0.1 to 5% from the viewpoint of the effect.
Examples of the disinfectant include benzalkonium chloride, benzethonium chloride, triclocarbamide, cetylpyridinium chloride, isopropylmethylphenol, and the like. The blending amount is preferably 0.01 to 5% in the cosmetic of the present invention, and particularly preferably 0.1 to 1% from the viewpoint of the effect.
Examples of antiperspirants include aluminum chloride, chlorohydroxyaluminum, aluminum lactate, allantoin aluminum derivatives, zinc p-phenol sulfonate, and the like. The blending amount of the antiperspirant is preferably 0.01 to 10% in the cosmetic composition of the present invention, and particularly preferably 0.05 to 5% from the viewpoint of the effect.

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

The cosmetics of the present invention are preferably used as skin, especially body cosmetics, more preferably used for the purpose of skin care of the body, because they are excellent in touch in a high temperature and high humidity environment as described above. It is preferably used as a skin care agent for body during summer, especially as a skin care agent for wet skin after bathing or showering.
The cosmetics of the present invention can be used on wet skin after applying to wet skin after bathing or showering, followed by drying, applying to wet skin, towel drying, applying water, A method such as washing with shower water and towel drying is preferred.
When the cosmetic of the present invention is applied to wet skin, the powder specifically adsorbs to the swollen keratin after bathing or showering, spreads throughout the whole body with a small amount of application, and is allowed to dry as it is. Even if you dry the towel, the powder will not come off the skin, and even if you wash it off with bath water or shower water, a sufficient amount of powder will remain on the skin, so you can have a moderate and smooth skin feel. 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, fragrances, etc., skin after bathing and after showering can be functionally conditioned. You can also enjoy the scent.

  Hereinafter, the present invention will be described in detail, but the present invention is not limited to these examples.

Examples 1-11 and Comparative Examples 1-3
The components shown in Tables 1 to 4 were mixed using a homomixer, and purified water was added thereto to make 100 parts by weight to prepare a skin cosmetic. Comparative Example 3 is a powder since purified water is not added.
The obtained cosmetics were used by 100 men and women 20 to 40 years old in the following usage, and the usability was evaluated according to the following evaluation criteria. The evaluation result is shown by the number of people.
(how to use)
After applying to wet skin after showering, towel drying is performed.
(Evaluation item)
Ease of application Ease of towel drying (ease of wiping water drops)
Skin feel after towel drying (smooth feeling)
○: Good △: Slightly bad ×: Bad Powder adhesion to skin (whether it looks white)
Powder adherence to clothing Soaring powder ○: None △: Somewhat ×: Some

  From Tables 1 to 4, it was confirmed that all of Examples 1 to 11 were superior to Comparative Examples 1 and 2 in all items.

Examples 12-19
The ingredients shown in Table 5 were mixed using a homomixer, and purified water was added thereto to make 100% to prepare a skin cosmetic.
The obtained cosmetics were used by 100 men and women 20 to 40 years old in the following usage, and the usability was evaluated according to the following evaluation criteria. The evaluation result is shown by the number of people.
(how to use)
After applying to wet skin after showering, towel drying is performed.
(Evaluation item)
Table 5 shows the number of people who responded that the skin feel (smooth feeling) was evaluated when the towel was dried and the humidity was 75% and the environment was 20, 30 or 35 ° C.

  From Table 5, the cosmetic of the present invention using both spherical powder and plate-like powder had a good feel when applied to the body, and was particularly excellent in the dry feeling in a high temperature environment. In addition, when the weight ratio of the spherical powder and the plate-like powder was 1:20 to 20: 1, the smooth feeling in a high temperature and high humidity environment was particularly good. In addition, the cosmetics of the present invention had good usability because the skin of the application part looked white, the powder adhered to the clothing, and the powder did not rise during application.

Examples 20-27 and Comparative Examples 3-4
Each component shown in Table 6 and Table 7 was added while stirring purified water, and the mixture was stirred and mixed to prepare an aqueous skin cosmetic. In addition,% of compounding quantity represents weight%.
In addition, 100 males and females aged 20 to 40 applied each obtained water-based skin cosmetic to wet skin after showering, followed by towel drying, immediately after application, 15 minutes after application, and 30 minutes after application. The presence or absence of a refreshing feeling was determined. The results are shown in Tables 6 and 7.

  From Table 6 and Table 7, it was confirmed that any of Examples 20 to 27 had a refreshing feeling in any case immediately after application, after 15 minutes after application, and after 30 minutes from Comparative Examples 3 and 4. .

Examples 28-31
The components shown in Table 8 were mixed using a homomixer, and purified water was added thereto to make 100 parts by weight to prepare an aqueous skin cosmetic.
100 males and females aged 20 to 40 years old applied the obtained cosmetics to wet skin after showering and then used it by a towel drying method to evaluate the skin feel and the dispersion state of the cosmetics. As a result, the cosmetic compounded with (meth) acrylic acid / (meth) acrylic acid alkyl copolymer, pemulene TR-1, which is a thickener, has a skin feel and a dispersed state as compared with a cosmetic which does not contain this. Both were significantly superior.

Examples 32 and 33
Water-based skin cosmetics were prepared using the components shown in Table 9. The obtained cosmetic was applied to wet skin after showering, then towel-dried, and evaluated for ease of hand picking, ease of spreading to the whole body, and uniformity of skin feel. Example 32 The ~ 35 cosmetics were all better than those without the thickener.

Claims (3)

The following components (A) to (D):
(A) A water-insoluble powder having an average particle size of 0.1 to 50 μm, and 50 to 100% of the powder is composed of a spherical powder and a plate-like powder, and the spherical powder and the plate-like powder. 5 to 60% by weight of water-insoluble powder having a body weight ratio of 5: 1 to 1: 5,
(B) an oily substance having a weight ratio of 0.1 to 1 with respect to the component (A),
(C) 0.05 to 5% by weight of l-menthol or a derivative thereof,
(D) 0.4 to 100 weight times water of the component (A),
A skin care method for a body comprising applying an aqueous body cosmetic composition containing water to skin wet with water, rinsing with water, and then drying with a towel.   The skin care method for a body according to claim 1, wherein a water-based body cosmetic containing silicone powder is used as the spherical powder.   The skin care method according to claim 1 or 2, wherein a water-based body cosmetic containing talc is used as the plate-like powder.