JP2880084B2 - Powder cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder cosmetic containing a rod-like powder under specific conditions. More specifically, the present invention relates to a powder cosmetic which has less whitening, has excellent adhesion, and has little caking, because the rod-shaped powder is uniformly oriented on the skin when applied to the skin.

[0002]

2. Description of the Related Art Conventionally, rod-like powders have been widely used as additives and reinforcing materials for plastics and paints. On the other hand, in the case of cosmetics, as disclosed by the present inventor in Japanese Patent Publication No. 94-448, a technique that focuses on the adhesiveness obtained from the shape of the powder itself is known.

On the other hand, the present inventor has analyzed the state of application of a conventionally known powder cosmetic at the time of application to the skin. As a result, plate-like powder such as sericite, titanium oxide having a submicron size, It has been found that powders such as iron oxide are often present separately on the skin. In other words, the binder (oil agent) blended in the powder cosmetic is often localized in the portion of the powder having a size of submicron or smaller. Body and
It was found that the plate-like powder behaved separately on the skin.

[0004] In this case, it has been recognized that the plate-like powder may be detached from the skin over time because the amount of the binder in the plate-like powder is small. Further, this tendency has been frequently observed in powder cosmetics using a fluorinated pigment which has recently become popular.

[0005] In addition, when the above-mentioned mixture of the powder and the binder is formed, there arises a problem that the hiding power of titanium oxide cannot be sufficiently utilized.

The present inventors have conducted intensive studies to solve these problems, and as a result, by blending the bar-shaped powder under specific conditions, the bar-shaped powder has a property of being uniformly oriented on the skin when applied to the skin. At the same time, it was found that the binder was not locally present and was uniformly dispersed. And, it was found that this powder cosmetic had characteristics of less whitening, excellent adhesion, and little caking.

This characteristic will be described in more detail. For example, when rod-shaped titanium oxide is blended, the same hiding power can be obtained with a smaller amount than conventional pigment-grade titanium oxide. In addition, since the rod-like powder enters between the plate-like powders, the cushioning property of the stamping surface is improved, and a powder cosmetic in which caking does not easily occur can be obtained.
And, since the binder is homogenized, the bonding force between the powder and the skin increases, and the rod-like powder having excellent adhesion to the skin is uniformly oriented on the skin, so that the powder having excellent adhesion can be obtained. A body cosmetic can be obtained.

Therefore, an object of the present invention is to provide a powder cosmetic which is characterized by blending a rod-shaped powder under specific conditions.

[0009]

In order to achieve the above object, a first aspect of the present invention is directed to a titanium oxide, a titanate, and a carbon dioxide.
Calcium oxide, silica, alumina, zirconia, nitride
It is selected from one of iodine, halosite, and iron oxide.
0.005 to 0.5 μm, and the ratio of the minor axis to the major axis is 1:10
１ ： 1: 2000, a rod-shaped powder having a major axis of 1 μm or more ,
A powder cosmetic comprising a plate-like powder having a major axis of 1 μm or more, iron oxide, and an oil agent .
And the compounding amount of the rod-shaped powder is 0.5 to 20 parts by weight,
A powder cosmetic comprising a volatile component in an amount of 0 to 15 parts by weight and a rod-shaped powder oriented at the time of applying the cosmetic.

[0010] Further, according to a second aspect of the present invention, the rod-shaped powder is
2. A composite powder or a surface-treated powder comprising at least one of titanium oxide, titanate, calcium carbonate, silica, alumina, zirconia, silicon nitride, halloysite, and iron oxide. It is a powder cosmetic.

Hereinafter, the configuration of the present invention will be described in detail. Dedicated powder used in the present invention is titanium oxide, titanate, calcium carbonate, silica, alumina, zirconia, silicon nitride,
Halloysite, selected from one or more of iron oxides, the size of which is 0.005 to 0.50 μm in minor axis, and the ratio of minor axis to major axis is in the range of 1:10 to 1: 2000. , And the major axis is 1 μm or more.

As a method for measuring the particle size, observation with a transmission electron microscope (TEM) or a scanning electron microscope (SE
M) Use the particle size obtained from observation.

[0013] In addition, the special powder of the present invention comprises titanium oxide,
A composite powder or a surface-treated powder comprising at least one of titanate, calcium carbonate, silica, alumina, zirconia, silicon nitride, halloysite, and iron oxide may be used. For example, a titanium oxide doped with iron oxide, a titanate surface-treated with alumina, or the like is applicable.

Since the rod-like powder generally has a high activity, it may affect the stability of cosmetics and the like, and it is preferable that the above-mentioned surface treatment or the surface treatment by a conventionally known method is performed. . As the type of surface treatment, for example, inorganic treatment with a metal oxide such as titania, amino acid,
Treatment with metal soap, silane coupling agent, titanium coupling agent, aluminum coupling agent, treatment with silicone, fluorine compound, fatty acid treatment, oil treatment,
Examples include treatment with natural products such as polysaccharides and DNA, treatment with silk, acylated lysine, keratin, and the like, treatment with a resin such as PMMA, treatment with plasma, treatment with mechanochemical, and the like.

The rod-shaped powder used in the present invention is a cosmetic 100
It is blended in a range of 0.5 to 20 parts by weight based on parts by weight. If the amount is less than 0.5 part by weight, the characteristics of the powdery powder cannot be sufficiently exhibited, and if it exceeds 20 parts by weight, there is a problem that the hiding power and the coloring power become too strong.

The powder cosmetic of the present invention must contain a plate-like powder, iron oxide, and an oil agent in addition to the above-mentioned dedicated powder. The plate-like powder referred to here is a powder having a plate-like shape such as sericite, talc, mica, kaolin, mica titanium, plate-like titanium oxide, plate-like iron oxide (MIO), and has a major axis of 1 μm. Refers to the above. Therefore, there are powders that are not applicable even in a plate shape, such as fine sericite. The major axis is 1
Powders smaller than μm exhibit the same behavior as conventional pigment-grade titanium oxide and iron oxide pigments, and cannot sufficiently exhibit the effects intended by the present invention.

The iron oxide has a major axis of 0.00%.
Iron oxide pigments in the range from 5 to 0.5 μm correspond. However, in the case of spherical powder, the average primary particle diameter is 0.00
It refers to one in the range of 5 to 0.5 μm. For example, yellow iron oxide, red iron oxide, black iron oxide, transparent iron oxide, and the like are applicable.

The oils correspond to all oils conventionally used in cosmetics. For example, higher alcohols such as cetyl alcohol, isostearyl alcohol, lauryl alcohol, hexadecyl alcohol, octyl dodecanol, fatty acids such as isostearic acid, undecylenic acid, and oleic acid, glycerin, sorbitol, ethylene glycol, propylene glycol, and polyethylene glycol Esters such as polyhydric alcohol, myristyl myristate, hexyl laurate, decyl oleate, isopropyl myristate, hexyldecyl dimethyloctanoate, glyceryl monostearate, diethyl phthalate, ethylene glycol monostearate, liquid paraffin, petrolatum, Hydrocarbons such as squalane, lanolin,
Examples include waxes such as reduced lanolin and carnauba wax, and oils such as mink oil, cocoa butter, coconut oil, palm kernel oil, camellia oil, sesame oil, castor oil, and olive oil.

Examples of other forms of oils include dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, polyether-modified organopolysiloxane, fluoroalkyl / polyoxyalkylene co-modified organopolysiloxane, Alkyl-modified organopolysiloxane, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, amodimethicone, amino-modified organopolysiloxane, silicone gel, acrylic silicone, trimethylsiloxysilicic acid, silicone compounds such as silicone RTV rubber, perfluoropolyether, Fluorine compounds such as pitch fluoride and fluoroalcohol are exemplified.

The cosmetic of the present invention requires that the rod-shaped powder be oriented on the skin when the cosmetic is applied. Specifically, it is necessary that the rod-shaped powder is oriented in the same direction, that is, oriented when using a powder cosmetic on the skin using an applicator such as a sponge or a chip for makeup. is there. The rod-shaped powder is generally oriented in a direction parallel to the direction in which the applicator is used, and as a degree of orientation, it is preferable that 60% or more of the powders in the number of the rod-shaped powders are oriented. And more preferably 70% or more. However, the definition of the oriented powder refers to a powder whose axis is oriented in a range of 40 degrees left and right (360 degrees in the entire circumference) with respect to the use direction of the applicator.

In the present invention, as a method for confirming the orientation, a cosmetic is applied to a human face and the cosmetic is applied to a cryo-SEM.
Although the method of observing using the method of (1) is preferable, the work is complicated, and therefore, generally, the following method is used instead.

A conductive double-sided tape is stuck on the sample stand for SEM, and human skin peeled off by sunburn is stuck on the tape, and the direction of application can be confirmed using an applicator with a powder cosmetic applied thereon. In a certain direction. This sample stage is vapor-deposited by an ordinary method, SEM observation is performed, and the ratio of oriented rod-shaped powder is calculated from the image. Generally, the orientation can be sufficiently confirmed by visual observation, but in the case of delicate cases, it is preferable to determine the orientation by image analysis using a computer.

In the powder cosmetic of the present invention, the compounding amount of volatile components such as water, cyclic silicone, isoparaffin and alcohol is 0 to 15 parts by weight per 100 parts by weight of the cosmetic.
And preferably 0 parts by weight. 15 volatile components
If the amount exceeds the weight part, a problem arises in that the orientation of the rod-shaped powder is disturbed.

In the powder cosmetic of the present invention, the compounding amount of the non-plate-like powder having an average primary particle diameter of 5 μm or more other than the rod-like powder is 0 to 15 parts by weight based on 100 parts by weight of the cosmetic. Part. Examples of the non-plate-like powder include resin powder and spherical resin beads. When these powders are added in an amount exceeding 15 parts by weight, the orientation of the rod-shaped powder is often disturbed.

Further, in the powder cosmetic of the present invention, 20 parts by weight or more of the powder surface-treated with the fluorine compound is mixed with 100 parts by weight of the powder mixed in the powder cosmetic. In some cases, the effect of the present invention is remarkable,
This is particularly remarkable when the plate-like powder is surface-treated with a fluorine compound. Examples of the fluorine compound here include perfluoroalkylphosphate triethanolamine salt, teflon, perfluoroalkylorganosilicone, perfluoroalkylsilane, perfluoroalkyl alcohol, perfluoroalkylcarboxylic acid, perfluoropolyether, and fluorine. And the like.

Powders treated with fluorine compounds often have very low surface free energy, which tends to repel binders conventionally used in cosmetics, resulting in localization of the binder. By blending the rod-shaped powder under the specific conditions of the present invention, localization of the binder can be prevented, and a cosmetic with a higher cosmetic effect can be obtained.

In the powder cosmetic of the present invention, powders conventionally used in cosmetics can be blended as powders other than those described above. For example, colored pigments such as yellow iron oxide, red iron oxide, black iron oxide, chromium oxide, carbon black, ultramarine, navy blue, cobalt blue, lower titanium oxide, blue No. 1, red No. 201, zinc oxide, titanium oxide White pigments such as cerium oxide, zirconium oxide, aluminum oxide and silicon oxide, extender pigments such as talc, mica, sericite, kaolin, mica, montmorillonite, pearl pigments such as mica titanium, barium sulfate, calcium carbonate, magnesium carbonate, Metal salts such as aluminum silicate and magnesium silicate, organic-coated pigments such as N-acyl aspartic acid-coated mica and metal soap-treated pigments, nylon powder, silk powder, urethane powder, Teflon powder, cellulose powder, silicone powder, gold-dyed silk powder , Polyethylene pow Polymeric powders, such as chromatography, N- organic powders such acylated lysine, further the fine particles of titanium oxide, zinc oxide particles, alumina-coated titanium oxide fine particles, fine particles powder, such as silica-coated fine particles of titanium oxide,
Bentonite, smectite and the like can be blended.

Further, in the powder cosmetic of the present invention, a surfactant, an ultraviolet absorber, a preservative,
Fungicides, preservatives, antioxidants, anti-inflammatory agents, hormonal agents,
Vitamins, moisturizers, fragrances and the like can be simultaneously added.

Examples of the types of cosmetics of the present invention include foundation, pressed powder, blusher, white powder, eyeshadow and the like.

[0030]

The present invention will be described in detail below with reference to examples and comparative examples. The evaluation methods of the examples and the comparative examples used in the present invention are as follows.

Evaluation of Orientation A conductive double-sided tape was stuck on a sample stand for SEM, human skin peeled off by sunburn was stuck thereon, and an applicator with the cosmetics of Examples and Comparative Examples stuck thereon. It was applied in a certain direction so that the application direction could be confirmed. Palladium was vapor-deposited on this sample stage, and SEM observation (magnification: 20) was performed using a SEM (S-800, manufactured by Hitachi, Ltd.).
00) and evaluated according to the criteria shown in Table 1.

[0032]

[Table 1]

Evaluation of White Floating The cosmetics of Examples and Comparative Examples were applied to the face, and photographed using an instant camera (made by Fujifilm) using a flash. The photographs were visually judged and evaluated according to the criteria shown in Table 2.

[0034]

[Table 2]

Sensory Evaluation (Evaluation of Adhesiveness and Feeling) Ten female panelists aged 20 to 40 years old were allowed to use the cosmetics prepared in Examples and Comparative Examples to obtain good stickiness (adhesiveness) and excellent feel. The number of respondents who responded that they were present was used as an index for sensory evaluation. Therefore, the greater the number, the better the adhesion,
Shows excellent feel.

Example 1, Comparative Examples 1-4 (Eye Shadow)

Example 1 A sample was produced according to the formulation shown in Table 3. The rod-shaped powder is 2% alumina-treated titanium oxide (short diameter 0.02 μm, long diameter 5 μm)
It was used.

[0038]

[Table 3]

(Production Method) Each component was mixed with a mixer, pulverized with a hammer mill, and pressed on a metal plate to obtain a product.

Comparative Example 1 A prototype was produced in the same manner as in Example 1 except that the rod-shaped powder of Example 1 was changed to pigment-grade titanium oxide (average primary particle diameter 0.23 μm).

Comparative Example 2 A prototype was produced in the same manner as in Example 1 except that the rod-like powder of Example 1 was changed to fine-particle titanium oxide (average primary particle diameter: 0.035 μm).

Comparative Example 3 A prototype was produced in the same manner as in Example 1 except that talc in Example 1 was changed to silicone beads (average primary particle diameter 10.0 μm).

(Comparative example 4) Example 1 was used as the rod-shaped powder.
Same as alumina 2% treated titanium oxide (minor diameter 0.02μ)
m, major axis 5 μm).

[0044]

[Table 4]

(Production Method) After mixing the component A (powder, oil) with a mixer, adding the component B (cyclic silicone), pulverizing with a paint shaker, and filling the mixture into a container to obtain a product.

Examples 2 to 4, Comparative Examples 5 to 6 (Foundation)

Example 2 A sample was prepared according to the formulation shown in Table 5. As the rod-like powder, potassium 3 titanate treated with 3% silicone (short diameter 0.2 μm, long diameter 1
5 μm).

[0048]

[Table 5]

(Production Method) After the powder components were mixed with a Henschel mixer, the liquid components that had been mixed in advance were added, and the mixture was further stirred and mixed.
Next, after pulverization was performed using an atomizer, the product was punched using a mold to obtain a product.

Example 3 A sample was prepared according to the formulation shown in Table 6. As the rod-shaped powder, calcium carbonate (short diameter 0.05 μm, long diameter 1 μm) treated with 5% perfluoroalkylphosphate triethanolamine salt was used. In addition, the perfluoroalkylphosphoric acid triethanolamine salt 5% treatment is hereinafter abbreviated as fluorine treatment.

[0051]

[Table 6]

(Production Method) After the powder components were mixed with a Henschel mixer, the liquid components that had been mixed in advance were added, and the mixture was further stirred and mixed.
Next, after pulverization was performed using an atomizer, the product was punched using a mold to obtain a product.

Example 4 A sample was prepared according to the formulation shown in Table 7. As the rod-shaped powder, titanium oxide composite-treated titanium oxide (short diameter 0.02 μm, long diameter 20 μm)
Was used, a sample of which was surface-treated with alumina 1% and silica 1%.

[0054]

[Table 7]

(Production Method) After the powder components were mixed with a Henschel mixer, the liquid components that had been mixed in advance were added, and the mixture was further stirred and mixed.
Next, after pulverization was performed using an atomizer, the product was punched using a mold to obtain a product.

(Comparative Example 5) A sample was produced according to the formulation shown in Table 8. Example 2 was used as the rod-shaped powder.
The same silicone 3% -treated potassium titanate as that of
2 μm, major axis 15 μm).

[0057]

[Table 8]

(Production Method) After the powder components were mixed with a Henschel mixer, the liquid components that had been mixed in advance were added, and the mixture was further stirred and mixed.
Next, after pulverization was performed using an atomizer, the product was punched using a mold to obtain a product.

Comparative Example 6 A prototype was produced in the same manner as in Example 3 except that the powder-like powder of Example 3 was changed to a fluorinated pigment grade titanium oxide (average primary particle diameter: 0.23 μm).

Table 9 shows the results of the evaluation of the orientation and the whitening evaluation for Examples 1 to 4 and Comparative Examples 1 to 6.
Shown in

[0061]

[Table 9]

From the results shown in Table 9, it was clarified that all the examples were highly oriented, and that the examples were less likely to cause whitening as compared with the comparative examples.

Table 10 shows the results of the sensory evaluation of Examples 1 to 4 and Comparative Examples 1 to 6.

[0064]

[Table 10]

From the results shown in Table 10, the examples had better tackiness (adhesiveness) and more excellent feel than the comparative examples. Also, from the results of Tables 9 and 10, it can be seen that the examples show excellent effects in all of the evaluation items. Furthermore, as the impression of the panelists at the time of sensory evaluation,
As compared with many of the comparative examples, it was confirmed that the cosmetics were easily removed and hard to cake.

[0066]

From the above, according to the present invention, the invention whitening less, excellent adhesion, it is either bright we provide caking less powder cosmetics.

Claims (2)

(57) [Claims] 1. Titanium oxide, titanate, calcium carbonate
, Silica, alumina, zirconia, silicon nitride, halo
Site, selected from iron oxides, with a minor axis of 0.005 to
0.5 μm, the ratio of the minor axis to the major axis is 1:10 to 1: 200
0, rod-shaped powder having a major axis of 1 μm or more , major axis of 1 μm
A powder cosmetic comprising the above plate-like powder, iron oxide and an oil agent, wherein 100 parts by weight of the cosmetic is mixed with a rod-like powder.
The amount of the body is 0.5 to 20 parts by weight,
A powder cosmetic comprising: 0 to 15 parts by weight, and the rod-shaped powder is oriented at the time of applying the cosmetic. 2. A rod-shaped powder comprising titanium oxide, titanate,
The powder cosmetic according to claim 1, wherein the powder cosmetic is a composite powder or a surface-treated powder composed of one of calcium carbonate, silica, alumina, zirconia, silicon nitride, halothite, and iron oxide.