JPH01172312A - Cosmetic - Google Patents

Abstract

PURPOSE:To obtain a cosmetic giving good feeling to the skin and having excellent cosmetic function, dispersibility and storage stability, by compounding cosmetic powder surface-coated with N-acylamino acid amide. CONSTITUTION:Surface of cosmetic powder is coated by using N-acylamino acid amide as a surface-coating agent for cosmetic powder. The coating is carried out e.g. by dissolving N-acylamino acid amide in a polar solvent such as methanol, ethanol or chloroform, dispersing the powder in the solution, distilling out the solvent under stirring, drying the distillation residue and pulverizing the product. The coated powder is used by adding and compounding to a cosmetic base. The weight ratio of N-acylamino acid amide to the cosmetic powder is (0.1-50):100. The amount of the coated powder is 1-95wt.% based on the cosmetic base.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a cosmetic composition containing a cosmetic powder whose surface is coated with an N-acylamino acid amide, and more particularly, to a cosmetic composition containing a cosmetic powder having good water repellency. It does not easily disturb makeup, and it also has excellent usability and functionality, such as spreading on the skin, adhesion to the skin, and moisturizing feeling.In addition, the lipophilicity of the powder is increased, making it homogeneous and miscible with oil-based cosmetics. The object of the present invention is to provide a cosmetic with good dispersibility and good stability over time.

[Prior Art] Cosmetic powders such as various inorganic and organic pigments have traditionally been added and blended into cosmetics.

Particularly in makeup cosmetics, cosmetic powders play a major role, and there are many types that are used depending on the cosmetic purpose and functionality, and in reality, the amount of powder used is also large. The reality is that it is being used. In order to bring out product characteristics, formulations and studies have been carried out by utilizing and combining the characteristics of individual powders.

In actual commercialization, the properties of the cosmetic powder will greatly influence the product characteristics, as mentioned above. Cosmetic powders generally have a hydrophilic surface, which makes them difficult to mix with oily ingredients, making it difficult to achieve uniform dispersion during formulation, and making it difficult to spread when applied to the skin. Unfortunately, it feels heavy, or when it is desired to improve the longevity of makeup, it has poor water repellency, and after being applied to the skin, it tends to fade due to sweating or the like.

Therefore, as a means to deal with such problems, methods have been adopted in which the powder surface is coated and modified. For example, typical hydrophobic treatments for powder include coating the powder surface with a highly water-repellent oil or metal soap, or baking methylhydrodiene polysiloxane onto the powder surface. .

[Problems to be Solved by the Invention] However, the previously known hydrophobic treatment of powder described above is superior in terms of imparting water repellency, preventing makeup from fading, and improving makeup durability. However, it has poor adhesion to the skin, feels dry and lacks moisture.
It has been pointed out that it feels hard and heavy when used, and that it has poor compatibility with cosmetic oils, causing powder settling and color separation in formulated products, resulting in poor dispersion stability. Each of them has its own merits and demerits and was not completely satisfactory.

Therefore, attempts have been made and reported to improve the above-mentioned problems. As can be seen from these situations, it is desirable to consider and improve the feel of use during application, adhesion to the skin, functionality, uniform miscibility with oil-based ingredients, and dispersion stability. was.

[Means for Solving the Invention] Under the circumstances, the inventors of the present invention have made extensive studies to overcome the above-mentioned drawbacks, and as a result, have discovered that the surface of a cosmetic powder is coated with N-acylamino acid amide. By doing so, it is possible to impart water repellency to the powder, and it has good adhesion to the skin and feels good when used.
We also discovered that it has properties such as increased lipophilicity and good miscibility with oily ingredients, and by incorporating this coated powder, we can improve the feeling of use such as feel and makeup persistence, functionality, and aging. The present invention was completed because an extremely excellent cosmetic material having a satisfactory combination of stability could be obtained.

That is, the present invention relates to a cosmetic product characterized by containing a cosmetic powder surface-treated with N-acylamino acid amide.

The configuration of the present invention will be explained below.

N-acylamino acid amide is a type of N-acylamino acid derivative, and as an amino acid oil gelling agent,
In addition, as a technology that applied this property to cosmetics,
-27776 is known.

In the present invention, the N-acylamino acid amide is used as a surface coating treatment agent for cosmetic powder,
The object of the present invention can only be achieved by blending the coated powder.

More specifically, N-acylamino acid amides are exemplified by:
N-lauroyl-glutamic acid-α,γ-di-n-
Butylamide (trade name, Coagulan GP-1) is mentioned. N-lauroyl-glutamic acid-α, γ-
Di-n-butyramide is a type of dialkylamide of N-acylglutamic acid.

Next, as the cosmetic powder used in the present invention, any powder that can be normally used in cosmetics can be used, such as talc, mica, kaolin, magnesium carbonate, calcium carbonate, aluminum silicate, and calcium silicate. , magnesium silicate, barium sulfate, silica, titanium dioxide,
White pigments such as zinc oxide, colored pigments such as black iron oxide, yellow iron oxide, red iron oxide, ultramarine blue, navy blue, and chromium oxide, pearling agents such as titanium mica, yellow iron oxide-coated mica, black iron oxide-coated mica, and bismuth oxychloride. , organic powders such as nylon powder, crystalline cellulose, and silk powder. In particular, when it is an inorganic powder, it can be expected to be more effective in improving the feel and dispersion stability. In the present invention, one or more of them may be selected from among them as necessary, and the mixture may be subjected to coating treatment.

In the present invention, the amount of the N-acylamino acid amide coated on the cosmetic powder is not limited, but the weight ratio of the former to the latter is in the range of about 0.1:100 to 50:100. , more preferably in the range of 0.5:100 to 20:Ioo.

The method of coating cosmetic powder with N-acylamino acid amide is not particularly limited; After dispersing the powder in a pre-dissolved N-acylamino acid amide in a suitable solvent, the solvent is distilled off with stirring, and then dried and ground;
- After dispersing the powder in a lower alcohol solution in which an acylamino acid amide has been dissolved, purified water is added to this while stirring (approximately 10 times the amount of alcohol), followed by filtration, washing with water, What is necessary is just to carry out by drying at 80 degreeC - 120 degreeC.

The coated powder of the present invention thus obtained has the powder surface coated with N-acylamino acid amide, and is imparted with water repellency and has good affinity with oily components. Since it has improved dispersibility and a good feel, it is used by adding and blending it into cosmetic base materials due to its properties.

The blending amount at that time can be arbitrarily selected depending on the type of cosmetic and the purpose of use, and is used in the range of about 1 to 95% by weight.

The cosmetics of the present invention are not particularly limited as long as they contain powder as a component, such as white powder, foundation, lipstick, cheek rouge, eyeliner, mascara, eye shadow,
Prepared as base cream, emulsion, cream, etc.
Widely available.

[Example] Next, the present invention will be further explained by giving examples.

Note that these do not limit the present invention in any way.

Example H] Emulsified eyeliner (formulation) (parts by weight) (1)
Beeswax 3.0 (2)
Setanol 0.4 (3)
Stearic acid 1.0 (4) Sorbitan sesquioleate 0.5 (average) Polyoxydimonooleate 0.9 tyrene sorbitan (20
E, 0. ) (0N-lauroyl-L-gluta 13.0 minic acid-
α,γ-di-n-butylamide treated black iron oxide $1-1) □ (7) 1,3-butylene gellicol
7.0(8) Methyl roseoxybenzoate 0.
1(9) Polymethacrylic acid 2.2
00) Triethanolamine 1.1 (b)
Purified water 70.8*+-1) N-lauroyl-glutamic acid-α.

γ-di-n-butyramide, 10 g ethanol, 1
1 kg of black iron oxide was added thereto and mixed and dispersed. Next, 10 kg of purified water was added to the stirred mixture, followed by filtration and washing with water (once). Thereafter, this was dried at 105°C and then ground to obtain the desired treated powder.

(Manufacturing method) A Components (1) to (5) are mixed, heated and dissolved, and then the components are mixed and dispersed and kept at about 80°C.

B Mix ingredients (7) to (1), heat and dissolve at about 80°C.
Keep warm.

Add B to CA while stirring to emulsify and cool.

A product is obtained by filling a container with DC.

Comparative Example [11 In the formulation of Emulsified Eyeliner Example [11], the coated black iron oxide of the present invention as component (6) was replaced with untreated black iron oxide without the coating treatment. Except for this, a product was obtained in the same manner as in Example [11].

A sensory test was carried out on Example [1] and Comparative Example [1] obtained as described above, and the samples were compared and evaluated.

In the sensory test, 120 female panelists selected evaluation items such as spreadability on the skin, uniformity of the makeup finish film, lack of powderiness (finish condition), and makeup persistence. Evaluation items were evaluated. The evaluation method was an absolute evaluation based on five grades of 1 to 5 for each evaluation item.

The results are shown in Table 1. The numerical values in the table are expressed as average scores, and the higher the score, the better the characteristics of the above-mentioned evaluation item are.

Table 1 As seen in the results in Table 1, the cosmetics containing the pigments treated with the coating treatment of the present invention spread well on the skin during use, do not become uneven, and form a uniform cosmetic film. It has a beautiful finish, especially compared to cosmetics using untreated pigments.
In the finished state, it did not give a powdery feeling and had a feeling of adhesion, and the water repellency was imparted to the pigment, making it difficult for the makeup to come off, and the makeup was extremely long-lasting.

In addition, the stability over time was investigated by filling cosmetics into glass bottles (content: 801) and leaving them at room temperature. As a result, even after 6 months, the cosmetics of the present invention showed no signs of pigment sedimentation or odor. No change was observed, and the results were extremely good.

Example [2] Powder foundation (formulation)
(Parts by weight) (1) N-lauroyl-L-gluta 90.0 Mic acid-α, γ-Z-n-
Butylamide-treated mixed powder $2-1) (2) Methyl paraoxybenzoate 0.1 (
3) Squalane l010 (4
) Flavor 0.1$2-1) N-lauroyl-glutamic acid-α.

40 g of γ-di-n-butylamide was heated and dissolved in 1 kg of isopropanol, and a mixed powder of the following composition was added to this.
After dispersing 1 kg, while stirring, under reduced pressure, 80 to 100
Isopropanol was distilled off at ℃. Thereafter, this was dried and then ground to obtain the desired treated powder.

(Parts by weight) (a) Titanium oxide 16.0 (b) Mica
53.5 (c) Talc 9
．． 0) Kaolin 2.0 (e) Alumina 2.0 (f) Crystalline cellulose 1.0 (t) Nylon powder 9.0 (t) Yellow iron oxide
3.5 (1 sword red iron oxide 3.5) Black iron oxide 0.5 (manufacturing method) A Components (2) to (4) are added to component (1), thoroughly mixed to make it homogeneous, and then crushed.

BA is filled into a container and press-molded to obtain a product.

Comparative Example [2] Powder Foundation In the formulation of Example [2], an untreated mixed powder without coating was used instead of the coated mixed powder of the present invention with component +11. A product was obtained in the same manner as in Example [2] except for the following.

A sensory test was carried out for Example [2] and Comparative Example [2] obtained as described above, and the results were compared and evaluated.

The sensory test was conducted in the same manner as in Example [1] described above. However, the following four evaluation items were mainly selected: spreadability on the skin, adhesion to the skin, moist feeling (no powderiness), and makeup persistence.

The results are shown in Table 2, and the numerical values in the table are expressed as average points.

Table 2 As seen in the results in Table 2, the cosmetics using the coated powder of the present invention were more easily applied and applied to the skin than the cosmetics using the untreated powder. It spreads well on the skin, has a smooth feel, is not powdery, has a moist feel, and also has good adhesion to the skin, has excellent makeup retention, and does not easily come off. It became clear that it was.

Furthermore, even when left at room temperature for 6 months, there was no change such as odor, and the product had good stability over time.

Example [3] Non-aqueous eyeliner (formulation) (parts by weight) (11
Rosin acid pentaerythritol 25.0 ester (odor starch fatty acid ester 4.0 (3)
Aluminum isostearate 1.0 μm+4 N-lauroyl-L-gluta 6.0 Minic acid-α,γ-di-n-butylamide treated black iron oxide $3-1) (5) Red iron oxide treated with the above $3-2) 2 ．． .

(6) Same as above treated yellow iron oxide $3-3) 3.0
(7) Same as above treated titanium oxide $3-4) z.

(8) Low boiling point isoparaffin 57.0ne3-
1) The same material as in Example [11-1) was used.

$3-2, 3, 4) The same procedure as in Example [1] 1l-1) was carried out except that red iron oxide, yellow iron oxide, and titanium oxide were used instead of black iron oxide. The desired treated powder was obtained.

(Manufacturing method) A Components (1) to (3) and (8) are mixed and heated and dissolved.

After adding and mixing components (4) to (7) to BA, they are uniformly dispersed using three rolls.

A product is obtained by filling a container with CB.

The product of Example [3] obtained as described above spreads smoothly and is easy to apply when used, has good adhesion, does not cause discoloration due to sweat or sebum, and has excellent makeup durability. there were.

At the same time, in the formulation of Example [3], components (4) to (7)
A non-aqueous eyeliner was prepared in the same manner using untreated pigment in place of the coated pigment of the present invention in Example 1. This was used as a comparative product and the stability over time was evaluated together with Example [3]. The method involves placing each product in a wide-mouth glass bottle (inner volume,
801), left at room temperature, and observed changes in state. As a result, after 6 months,
In contrast to the comparative product, color separation occurred on the inner wall and mouth of the glass container, and pigments settled and separation phenomena were observed, whereas the product of the present invention (Example [3]) did not have such problems. ,
It has excellent stability over time and is easy to use.

Example [41 Mascara (formulation) (parts by weight) (1)
Rosin acid pentaerythritol 20.0 ester ((a) Starch fatty acid ester 5.0 (
3) Aluminum isostearate 1.0 μm (4) Polyethylene wax 8.0 (5
) Soybean phospholipid 0.5 (6)
Silicic anhydride 1.0 (7) N-lauroyl-L-gluta 20.0 Minic acid-α, γ-di-n-butylamide treated black iron oxide $4-1) (8) Isoparaffin 44.5 $
4-1) N-lauroyl-glutamic acid-α.

Except that 40 g of γ-di-n-butylamide was used.
The desired treated powder was obtained in the same manner as in Example [11, 1l-1).

Ta.

(Manufacturing method) A Components (11 to (5) and (8)) are mixed and heated and dissolved.

Component (7) is added and mixed to BA and uniformly dispersed.

A product is obtained by filling a container with CB.

The product of Example [4] obtained as described above has excellent adhesion to eyelashes, resistance to makeup deterioration due to sweat and sebum, and long-lasting makeup, as well as stability over time. It was good.

Example [5] Nail enamel (formulation) (parts by weight) (11
Nitrocellulose 13.0 (odor) Alkyd resin 9.0 (3) Acrylic resin 5.0 (4) Acetyl tributyl citrate 3.0 (5) Organic bentonite 0.5 (6) Old camphor
2.0(7) Butyl acetate
25. .

(8) Ethyl acetate 1000 (odor)
Butanol 3.0CIO)
Yellow No. 401 0.05 (1 Li Red No. 226 0.0302) Silicic anhydride 0.503) N-lauroyl-L-gluta 2.0 Mic acid-α,γ-di-n-butylamide treated yellow iron oxide coated mica Titanium 5-1) (River Toluene 26.92$5
-1) N-lauroyl-L-glutamic acid-α.

1l-1) of Example [1] except that γ-di-n-butylamide, 20 g, and yellow iron oxide-coated mica titanium were used.
The desired treated powder was obtained in the same manner as above.

(Manufacturing method) A Mix ingredients (1) to (9) and (1) to make it homogeneous.

Add and mix components 6G) to (+3) to BA and uniformly disperse.

A product is obtained by filling a container with CB.

In the product of Example [5] obtained as described above, the Burl pigment maintained a uniformly dispersed state, the finished film appearance was clean, and no sedimentation or color separation was observed over time. Storage stability was also good.

[Effects of the Invention] As detailed above, the present invention is characterized in that it contains a cosmetic powder whose surface is coated with N-acylamino acid amide. ” In other words, the powder coated with N-acylamino acid amide has increased lipophilicity as well as water repellency, and has a good feel, and the effect is exerted by making use of these properties.

The coated powder of the present invention is water-repellent, making it possible to obtain cosmetics that do not easily discolor makeup and have excellent long-lasting makeup, and is lipophilic, so powder components can be In the case of the main type of makeup cosmetics, it is possible to produce products that repel sweat and the like, blend easily with sebum, and maintain a soft feeling for a long time, especially in terms of finish.

Furthermore, since the coated powder of the present invention is lipophilic, it has good miscibility with oil-based ingredients, particularly improves mixing and dispersibility in oil-based cosmetics, and eliminates color unevenness during application. ,
The finished film is uniform, does not feel heavy, has a smooth and stretchy feel, and has no settling of powder and good dispersion stability.

Furthermore, the coated powder of the present invention has good adhesion to the skin, is not powdery, and has a moist feel, so it is possible to obtain a product that has both of these properties at the same time. It has the following advantages.

Therefore, the present invention has made it possible to provide cosmetics with improved usability, cosmetic function, and dispersion/storage stability compared to those of the past.

that's all Applicant: Kobayashi Kose Co., Ltd.

Claims (1)

[Claims] (1) A cosmetic product characterized by containing cosmetic powder whose surface is coated with N-acylamino acid amide.