JP2015067542A - Skin cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin cosmetic which has extremely quickly drying properties, a refreshing feeling, and a dry touch feeling, and further has an excellent re-dispersibility.SOLUTION: The invention provides a skin cosmetic comprising nylon powders, polyethylene powders, ethanol powders, and water, wherein the total amount of the content of the nylon powders and the content of the polyethylene powders is 0.4-10.0 mass%, the content of the polyethylene powders to 1.0 part by mass of the content of the nylon powders is 1.0-5.0 parts by mass, the content of the ethanol is 30.0-90.0 mass%.

Description

  The present invention relates to a skin cosmetic.

  2. Description of the Related Art Conventionally, as a cosmetic for giving a refreshing feeling or a smooth feeling after application, a two-layer cosmetic containing a powder in a liquid such as water or alcohol is known (Patent Document 1 and Patent Document 2). ). Since such a two-layer cosmetic is separated into two layers when left standing, after the powder is dispersed throughout the cosmetic by shaking the container containing the cosmetic just before use, Apply to the body. Therefore, such cosmetics are not only excellent in properties that give quick drying after application, a refreshing sensation, and a smooth sensation, but also easily disperse the powder when shaken (“redispersibility”). It is also required to be excellent.

  In order to enhance the above-mentioned quick-drying and refreshing feeling, it is effective to use high-concentration ethanol as the liquid containing the powder, but in that case, the powder tends to aggregate and solidify, There is a problem that the redispersibility is lowered. In order to alleviate such a problem, a technique (Patent Document 3) containing polyoxyethylene alkyl ether phosphoric acid, a technique (Patent Document 4) containing an organic acid and / or a salt thereof, and a nonionic surfactant were added. A technique (Patent Document 5) and a technique (Patent Document 6) containing a water-soluble aluminum salt are known.

  However, with such prior art, although redispersibility is somewhat improved, it is still not sufficient.

JP 2003-095906 A JP 2004-262887 A JP 2001-163725 A JP 2001-354512 A JP 2001-348317 A JP 2007-246465 A

  Therefore, the subject of this invention is providing the skin cosmetics which have the further excellent redispersibility, having high quick-drying property, a refreshing feeling, and a smooth feeling.

That is, the gist of the present invention is as follows.
[1] including nylon powder, polyethylene powder, ethanol and water,
The total amount of the content of the nylon powder and the content of the polyethylene powder is 0.4 to 10.0% by mass,
The content of the polyethylene powder is 1.0 to 5.0 parts by mass with respect to 1.0 part by mass of the nylon powder,
It is related with the skin cosmetics whose content of the said ethanol is 30.0-90.0 mass%; and [2] skin cosmetics as described in said [1] which is a lotion.

  According to the present invention, the effect of not only being excellent in quick-drying on the skin, refreshing feeling and smooth feeling but also being able to further improve the redispersibility of the powder which is a component is exhibited.

  The skin cosmetic of the present invention contains nylon powder, polyethylene powder, ethanol, and water as essential components. The skin cosmetic of the present invention preferably further contains an electrolyte, and may contain components other than nylon powder, polyethylene powder, ethanol, water, and electrolyte (other components). As the components contained in the skin cosmetic of the present invention, for example, nylon powder, polyethylene powder, electrolyte, etc., each may be used alone or in combination of two or more.

  A wide variety of powders are known in the cosmetics field, but the present invention has one feature in that two types of powders, nylon powder and polyethylene powder, are used as essential components. By using a combination of nylon powder and polyethylene powder at a specific ratio, the characteristics (redispersibility) that the powder easily disperses when shaken after the skin cosmetic is left standing are extremely excellent.

[Nylon powder]
The nylon powder in the skin cosmetic composition of the present invention is a powder that is blended together with polyethylene powder to give the user a smooth feeling. Examples of the material of the nylon powder include nylon 6 and nylon 12. Only one type of nylon powder may be used, or two or more types may be used.

  The average particle size of the nylon powder in the skin cosmetic of the present invention is not particularly limited, but is preferably 1.0 to 40.0 μm, more preferably 1.0 to 20.0 μm, and still more preferably 3.0 to 10. 0 μm.

  A commercially available product can be used as the nylon powder in the skin cosmetic of the present invention. As said commercial item, the product name "Ganz Pearl GPA-550" by Aika Kogyo Co., Ltd .; the product name "Orgasol (R) 2002 EXD NAT COS" by Arkema Co., Ltd., etc. are mentioned, for example.

[Polyethylene powder]
The polyethylene powder in the skin cosmetic of the present invention is a powder that is blended together with nylon powder in order to give a smooth feeling to the user. The polyethylene powder may be used alone or in combination of two or more.

  The average particle diameter of the polyethylene powder in the skin cosmetic of the present invention is not particularly limited, but is preferably 1.0 to 40.0 μm, more preferably 3.0 to 20.0 μm, and still more preferably 5.0 to 15. 0 μm.

  A commercially available product can be used as the polyethylene powder in the skin cosmetic of the present invention. As said commercial item, the Sumitomo Seika Co., Ltd. make, brand name "flow beads CL-2080R"; Honeywell company make, brand name "ASENSA SC202" etc. are mentioned, for example.

[Other powders]
The skin cosmetic of the present invention may contain powders other than polyethylene powder and nylon powder (sometimes referred to as “other powders”). Although it does not specifically limit as said other powder, For example, a silica, a polystyrene, a polymethylmethacrylate (PMMA), a urethane, a talc, a silicone powder, a hydroxyapatite etc. are mentioned. When the skin cosmetic of the present invention contains other powder, the content of the other powder in the skin cosmetic of the present invention is 0 with respect to 100 parts by mass of the total content of polyethylene powder and nylon powder. 0.01-10.0 mass parts is preferable, More preferably, it is 0.05-1.0 mass part. The average particle size of the other powders is not particularly limited, but is preferably 0.1 to 40.0 μm, more preferably 1.0 to 20.0 μm.

[Electrolytes]
The skin cosmetic of the present invention preferably further contains an electrolyte. By including the electrolyte, the effect of improving the redispersibility of the powder is exhibited.

  The electrolyte is not particularly limited, and examples thereof include monovalent metal salts and divalent or higher polyvalent metal salts. The metal salt may be an inorganic salt or an organic salt. Examples of the metal salt include sodium salt, potassium salt, calcium salt, magnesium salt, zinc salt, ammonium salt, aluminum salt and the like. Specifically, zinc paraphenol sulfonate, sodium chloride, potassium chloride, calcium chloride, magnesium chloride, magnesium sulfate, alum, sodium carbonate, sodium bicarbonate, potassium bicarbonate, ammonium chloride, sodium phosphate, dihydrogen phosphate Examples thereof include sodium, sodium dihydrogen phosphate, sodium citrate (trisodium citrate), disodium edetate, and potassium aluminum sulfate. The electrolyte further includes benzalkonium chloride and chlorohydroxyaluminum. Only 1 type may be used for the said electrolyte and 2 or more types may be used for it. Among these, from the viewpoint of further improving redispersibility, zinc paraphenolsulfonate, benzalkonium chloride, chlorohydroxyaluminum, and potassium aluminum sulfate are preferable.

  When the skin cosmetic of the present invention contains an electrolyte, the content of the electrolyte is not particularly limited, but is preferably 0.05 to 20.0% by mass, more preferably 100% by mass of the skin cosmetic of the present invention. Is 0.1-10.0 mass%, More preferably, it is 0.1-1.0 mass%. From the viewpoint of promoting the formation of an aggregate of polyethylene powder and nylon powder, it is preferably 0.05% by mass or more, and if the electrolyte is excessively added, the smooth feeling may be lowered. The following is preferable.

  In the skin cosmetic of the present invention, ethanol and water are essential liquid components.

[ethanol]
The content of ethanol in the skin cosmetic of the present invention is 30.0 to 90.0% by mass, preferably 35.0 to 85.0% by mass, in 100% by mass of the skin cosmetic of the present invention. More preferably, it is 40.0-60.0 mass%. From the viewpoint of imparting quick-drying and refreshing feeling to skin cosmetics, the content is 30.0% by mass or more. % Or less.

[water]
Although content of water in the skin cosmetics of this invention is not specifically limited, For example, 5.0-69.0 mass% is preferable in 100 mass% of skin cosmetics of this invention, More preferably, 20.0 It is -60.0 mass%.

[Other ingredients]
The skin cosmetic of the present invention may contain components other than nylon powder, polyethylene powder, ethanol, water, and electrolyte (other components). Examples of other components include surfactants, fats and oils, hydrocarbon oils, waxes, higher fatty acids, fatty acid ester oils, higher alcohols, lower alcohols, sterols, humectants, viscosity modifiers, pH adjusters, inorganic pigments. , Pigments, antioxidants, ultraviolet absorbers, vitamins, astringents, whitening agents, animal and plant extracts, sequestering agents, and the like.

[Skin cosmetic]
The skin cosmetic of the present invention can be produced by a conventional method. For example, the product of the present invention can be produced by adding a powder component to a container charged with a liquid component and stirring at room temperature.

  The total amount of the content of the nylon powder and the content of the polyethylene powder in the skin cosmetic of the present invention is 0.4 to 10.0% by mass in 100% by mass of the skin cosmetic of the present invention. 0.0-5.0 mass% is preferable, More preferably, it is 1.5-4.0 mass%. From the viewpoint of imparting a smooth feeling to the skin cosmetic, the total amount is 0.4% by mass or more, and from the viewpoint of preventing the skin after application from becoming excessively white (whitening), the total amount is 10.0. It is below mass%.

  In the skin cosmetic composition of the present invention, the content of polyethylene powder is 1.0 to 5.0 parts by mass with respect to 1.0 part by mass of nylon powder with respect to the ratio of nylon powder to polyethylene powder, and 2.0 It is preferable that it is -4.0 mass parts, More preferably, it is 2.5-3.5 mass parts. From the viewpoint of redispersibility, the polyethylene powder is 1.0 part by mass or more, and from the viewpoint of imparting a smooth feeling to the skin cosmetic, the polyethylene powder is 5.0 parts by mass or less.

  Although the pH of the skin cosmetics of this invention is not specifically limited, From a viewpoint of the influence on a human body, it is 3.0-8.0 at 25 degreeC, for example, More preferably, it is 4.0-7.0. The pH of the skin cosmetic can be adjusted by adding an acid or alkali as appropriate.

The skin cosmetic of the present invention contains a relatively high concentration of ethanol. Thereby, it is excellent in quick-drying after apply | coating skin cosmetics, and can provide a still higher refreshing feeling. Furthermore, a smooth feeling can be provided by including polyethylene powder and nylon powder.
However, in general, in skin cosmetics containing powder, when the ethanol concentration is increased, the powder tends to aggregate during storage, and the redispersibility of the powder during use is reduced. .

  In contrast, the present inventors have found that by using polyethylene powder and nylon powder in combination, the redispersibility of the powder is greatly improved even in the presence of a high concentration of ethanol. completed. As the mechanism for improving the redispersibility of the powder in this way, the details are unknown, but by using polyethylene powder and nylon powder together, the polyethylene powder and nylon powder form an aggregate, and this aggregate Are accumulated in a sparse state, so it is assumed that they can be easily re-dispersed by gentle shaking.

  In addition, it is preferable to add an electrolyte because an aggregate of polyethylene powder and nylon powder is more easily formed and redispersibility is further improved.

  As shown in the examples below, the combination of silica powder, polystyrene powder and talc did not improve redispersibility, so in the present invention, polyethylene powder and nylon powder are essential powders. In addition, by limiting the mass ratio of both to a specific range, the effect of improving the redispersibility is exhibited.

  The skin cosmetic of the present invention is preferably a lotion, for example. Moreover, it can also be used as a sheet cosmetic by impregnating the skin cosmetic of the present invention which is the above-mentioned lotion into a sheet substrate such as a nonwoven fabric.

  Hereinafter, the present invention will be described in more detail based on examples and the like, but the present invention is not limited only to such examples.

(1) Preparation of skin cosmetics According to the compositions described in Tables 1 to 3, each skin cosmetic of Examples 1 to 21 and Comparative Examples 1 to 11 was prepared by a conventional method and subjected to the following evaluation.

(2) Evaluation of skin cosmetics The skin cosmetics prepared in each Example and each Comparative Example were evaluated as follows.

(2-1) Redispersibility After filling the skin cosmetics prepared in each Example and each Comparative Example into a transparent cylindrical polypropylene (PP) container (capacity 170 ml), transported by a distance of about 1000 km by truck. did. After that, it was shaken at a speed of 3 reciprocations / second. The redispersibility of the powder when shaken was evaluated according to the following evaluation criteria.
<Evaluation criteria for redispersibility>
A (very good): Re-dispersed by reciprocal shaking.
○ (Good): Re-dispersed by 2-4 reciprocating shakes.
Δ (insufficient): Re-dispersed by 5-10 reciprocating shakes.
X (Bad): Not redispersed even by 10 reciprocating shakes.

(2-2) Quick-drying, dry feeling after application and whitening The skin cosmetics (about 1 ml) prepared in each Example and each Comparative Example were applied to the inner side of the forearm of a specialized panel, and the skin was applied according to the following criteria. The quick drying property above, the smoothness after application and the degree of whitening were evaluated. The evaluation test was conducted by 20 professional panelists in a room at a temperature of 23 ° C. and a relative humidity of 60%.

<Evaluation criteria for quick drying>
Each expert panel scored 1 point when it felt fast drying, 0 points when it felt fast-drying of usable level, and -1 point when it felt slow drying. Evaluation was made according to the following criteria from the average score of 20 professional panelists.
A (very good): The average score is 0.5 or more.
○ (Good): The average score is 0 or more and less than 0.5.
X (defect): The average score is less than 0 points.

<Evaluation criteria for whitening>
1 point if each professional panelist feels that no whiteness is recognized, 0 point if he feels that white is slightly recognized, and if he feels that white is clearly recognized A score of -1 was assigned. Evaluation was made according to the following criteria from the average score of 20 professional panelists.
A (very good): The average score is 0.5 or more.
○ (Good): The average score is 0 or more and less than 0.5.
X (defect): The average score is less than 0 points.

<Evaluation criteria for smooth feeling after application>
◎ (Very good): More than 16 out of 20 responded that they felt smooth.
○ (Good): 11 to 15 out of 20 responded that they felt smooth.
Δ (insufficient): 6 to 10 out of 20 responded that they felt smooth.
X (defect): 5 or less of 20 responded that they felt a smooth feeling.

(3) Results and discussion The results are shown in Tables 1 to 3 below.

The details of each raw material in the table and the following formulation examples are as follows. In addition, the amount described in the table is not the amount of merchandise but the amount of each component (amount of active ingredient).
Ethanol (Takara Shuzo Co., Ltd., trade name: 95 ° general fermented alcohol)
Nylon powder (Aika Industry Co., Ltd., trade name: Gantz Pearl GPA-550, average particle size: 4.0 to 6.0 μm)
Polyethylene powder (manufactured by Sumitomo Seika Co., Ltd., trade name: Flow beads CL-2080R, average particle size: 8.0 to 11.1 μm)
Silica powder (manufactured by JGC Catalysts & Chemicals, trade name: Silica Microbeat P-1500, average particle size: 5.0 to 6.5 μm)
Polystyrene powder (Aika Kogyo Co., Ltd., trade name: Ganzpearl GS-1105M, average particle size: 8.5 to 12.5 μm)
Talc (Nippon Talc Co., Ltd., trade name: Talc MS, average particle size: 13.0 to 19.0 μm)

Zinc paraphenol sulfonate (Matsumoto Fine Chemical Co., Ltd., trade name: Zinc sulfocoborate)
Potassium chloride (made by Ako Kasei Co., Ltd., trade name: potassium chloride pharmacopoeia)
Chlorhydroxyaluminum (manufactured by Taki Chemical Co., Ltd., trade name: PAC # 1000)
Sodium citrate (Product name: Trisodium citrate (Crystal) S)
Edetate disodium (product name: Dissolvin NA-2, manufactured by Lion Corporation)
Isopropylmethylphenol (Osaka Kasei Co., Ltd., trade name: Isopropylmethylphenol)
Menthol (Takasago International Corporation, trade name: Mentor JP COS)

  From the results shown in Tables 1 and 3, it was found that the products of the present invention (Examples) were very good or good in all evaluation items.

  On the other hand, it was found that the redispersibility was inferior with the composition of only the nylon powder (Comparative Example 1) and the polyethylene powder (Comparative Example 2) as the powder. In Comparative Examples 2 and 5, the powder floated on the upper layer of the liquid component. Since this state is not preferable from the viewpoint of stability, the redispersibility of this example was determined to be x (defective) (* 1).

  The composition with a small amount of ethanol (Comparative Example 3) was inferior in terms of quick drying. In compositions where the mass ratio of nylon powder to polyethylene powder is outside the range of the present invention (Comparative Examples 4 and 5), redispersibility is poor, and in compositions where the ratio of polyethylene powder is low (Comparative Example 4), the smooth feeling after coating It was also inferior. When the total content of the nylon powder and the polyethylene powder was outside the range of the present invention (Comparative Examples 6 and 7), the dry feeling was inferior or the whitening was inferior. Furthermore, redispersibility was not improved even when combined with powdered silica powder, polystyrene powder or talc, which are widely used in the cosmetics field, instead of the combination of nylon powder and polyethylene powder. This suggests that the effect of improving redispersibility by a combination of using nylon powder and polyethylene powder as a powder is unique in cosmetics having a relatively high ethanol concentration.

  In addition, although the skin cosmetics of the composition whose ethanol is 95.0 mass% was prepared, since irritation | stimulation to skin was too strong, it was judged that the use as cosmetics cannot be performed.

Formulation Example 1 [Lotion]
Isopropyl methylphenol: 0.1% by mass
Dipotassium glycyrrhizinate: 0.1% by mass
1,3-butylene glycol: 2.0% by mass
Propylene glycol: 1.0% by mass
l-Menthol: 0.1% by mass
Polyethylene powder: 1.4% by mass
Nylon powder: 0.7% by mass
Ethanol: 30.0% by mass
Purified water: 64.6% by mass

Formulation Example 2 [Lotion]
Isopropyl methylphenol: 0.1% by mass
Citric acid: 0.1% by mass
Sodium citrate: 0.3% by mass
1,3-butylene glycol: 5.0% by mass
Propylene glycol: 1.0% by mass
l-Menthol: 0.2% by mass
Fragrance: 0.2% by mass
Polyethylene powder: 2.0% by mass
Nylon powder: 0.7% by mass
Ethanol: 40.0% by mass
Purified water: 50.4% by mass

  The skin cosmetic of the present invention can be used, for example, as a lotion.

Claims (3)

Including nylon powder, polyethylene powder, ethanol and water,
The total amount of the content of the nylon powder and the content of the polyethylene powder is 0.4 to 10.0% by mass,
The content of the polyethylene powder is 1.0 to 5.0 parts by mass with respect to 1.0 part by mass of the nylon powder,
Skin cosmetics whose content of the said ethanol is 30.0-90.0 mass%.   The skin cosmetic according to claim 1, further comprising an electrolyte, wherein the content of the electrolyte is 0.05 to 20.0 mass%.   The skin cosmetic according to claim 1 or 2, which is a skin lotion.