JP3100413B2 - Makeup cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a makeup cosmetic. More specifically, the present invention relates to a makeup cosmetic which has excellent spreadability and coverability, has a good feeling of close contact, and hardly causes line unevenness.

[0002]

BACKGROUND OF THE INVENTION Makeup cosmetics are produced by blending an antioxidant, a plasticizer, a solvent, and the like in addition to an oily base, a powder, a colorant, and the like. In recent years, such makeup cosmetics are often blended with a spherical powder in order to impart a good feeling of use, for example, good slippage and light spread. As such a spherical powder, an organic spherical powder or an inorganic spherical powder having a substantially spherical shape and an average particle diameter of about 1 to 50 μm is used. For example, examples of the organic spherical powder include an organic spherical powder composed of a polyamide resin, a polyolefin resin, an alkyl (meth) acrylate resin, a cellulose resin, or a styrene resin. , Silica, alumina or magnesium carbonate.

[0003] By using such a spherical powder, since the form of the spherical powder is spherical, the feeling of use of the makeup cosmetic is improved, but these spherical powders
Since the refractive index is low, it is difficult to obtain a makeup cosmetic having good hiding power. It is conceivable to use a high-refractive-index spherical powder having a high hiding power in combination to complement the characteristics of such makeup cosmetics.However, when a plurality of powders having different refractive indexes are used, sufficient uniformity and It is difficult to obtain a make-up cosmetic having stability. For example, in the case of a solid foundation, color unevenness and color floating are likely to occur.

[0004] In order to solve the above-mentioned problems in makeup cosmetics, coated particles having an outer wall formed around a spherical powder have been used. For example, JP-A-61 -257908
In the publication, an outer wall is formed around the core powder by mixing and compression using an inorganic or organic powder having an average particle diameter of 1/5 or less of the average particle diameter of the core powder. A makeup cosmetic containing the prepared coated particles having an outer wall is disclosed. By incorporating such coated particles, the make-up cosmetics can be improved to some extent (extensibility), but there is room for further improvement in the sense of adhesion and the occurrence of streaks of the make-up cosmetics. is there.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems in the prior art, and has good stretchability (extensibility), covering power (hiding ability) and good sense of close contact, and has uneven stripes (or colors). An object of the present invention is to provide a makeup cosmetic which is less likely to cause unevenness and has a beautiful finish.

[0006]

Makeup cosmetics of the present invention SUMMARY OF THE INVENTION, in May caps cosmetic containing the coated inorganic particles, the outer periphery of the coated inorganic particles, the average nucleus inorganic particles and the nucleic inorganic particles with a particle size 1~30μm And the spherical organic fine powder having an average particle diameter of 1/10 or less of the core inorganic particles is adhered to the outer periphery of the core inorganic particles by a spray drying method. It is characterized by having.

[0007] The makeup cosmetic of the present invention contains coated inorganic particles having an outer wall formed by the spray-drying method as described above, so that the makeup (extensibility), the covering power (concealing properties) and the adhesion are provided. The feeling is good, and stripe unevenness (or color unevenness) hardly occurs, and the finish becomes beautiful.

[0008]

DETAILED DESCRIPTION OF THE INVENTION Next, the makeup cosmetics of the present invention will be described specifically. The makeup cosmetic of the present invention contains coated inorganic particles. The coated inorganic particles are composed of core inorganic particles and a spherical organic fine powder adhered to the outer periphery of the core inorganic particles.

The core inorganic particles have an average particle diameter of 1 to 3.
Inorganic powders in the range of 0 μm, preferably in the range of 1 to 15 μm, more preferably in the range of 3 to 10 μm are used. Further, it is preferable that the core inorganic particles have a uniform particle size, and in particular, an inorganic powder having a particle size distribution measured by a sedimentation method usually in the range of 1 to 50, preferably 3 to 15 is used. . Further, as the nuclear inorganic particles, those having various shapes from a true spherical shape to a plate-like shape can be used.

[0010] Examples of such powders which become the core inorganic particles include titanium oxide, talc, mica, kaolin, silica, zinc oxide, barium sulfate, magnesium carbonate, calcium carbonate, dibasic calcium phosphate, iron oxide, and iron oxide. chromium,
Mention may be made of powders such as ultramarine, navy blue and alumina. For example, inorganic powders having a plate-like shape such as talc, mica and sericite have not so good dispersibility in makeup cosmetics. Use of a spherical organic fine powder is highly useful.

[0011] The spherical organic fine powder adhered to the outer periphery of the core inorganic particles has an average particle diameter of 1/10 or less, preferably 1/20 or less of the average particle diameter of the nuclear inorganic particles. ing. By using the spherical organic fine powder having a ratio of the average particle diameter to the core inorganic particles is within the above range, the flowability of the obtained coated inorganic particles becomes very good, and the charge amount can be easily adjusted, Further, the coated inorganic particles hardly aggregate.

This spherical organic fine powder is formed from an organic substance. For example, this fine powder can be formed of a resin and / or an organic pigment, but in the present invention, an organic fine powder made of a resin is particularly preferable. Examples of the resin for forming the fine powder include (meth) acrylic acid-based resins [eg, (meth) acrylic acid (co) polymer, (meth) acrylic acid alkyl ester (co) polymer], polyamide-based resins Resins, polyolefin-based resins, cellulose-based resins, various resins such as polystyrene-based resins and mixtures of these resins may be mentioned, and these resins may be homopolymers or copolymers. . In particular, in the present invention, it is preferable that the resin has heat resistance of such a degree that its form is not significantly changed by heating when adopting the spray drying method.For example, when a thermoplastic resin is used, It is preferable to use a resin having a melting point of 50 ° C. or higher. In the present invention, among these resins, a (meth) acrylic acid-based resin is preferable.

The organic fine powder needs to be spherical. Here, the spherical shape means that the value of the maximum diameter / the minimum diameter is 2
A sphere within the range of 範 囲 1 is meant. Therefore, in the present invention, it is possible to use from fine spherical powder to fine elliptical powder. In particular, in the present invention, the maximum diameter /
It is preferable to use a spherical organic fine powder having a minimum diameter in the range of 1.5 to 1, and it is particularly preferable to use a spherical organic fine powder in the range of 1.2 to 1. That is, in the present invention, it is preferable to use a spherical organic fine powder having a shape as close to a true sphere as possible.

[0014] Such a spherical organic fine powder can be produced by various methods such as a method of pulverizing a resin prepared by a usual polymerization method and then classifying the resin. In the present invention, in particular, an emulsifier is used without using an emulsifier. It is preferable to use an organic fine powder prepared by a soap-free polymerization method (a non-emulsion polymerization method) in which polymerization is performed in an aqueous solvent. For example, a spherical solvent composed of polymethyl methacrylate by adding methyl methacrylate, a reaction initiator, a dispersant, and the like to an aqueous solvent such as ion-exchanged water, and polymerizing methyl methacrylate in an inert gas stream such as nitrogen under stirring. Organic fine powder can be prepared. Here, a water-soluble polymer such as polyvinyl alcohol is used as the dispersant. As the reaction initiator, peroxides such as potassium persulfate and benzoyl peroxide are used. The reaction temperature in this soap-free polymerization is usually 75 to 80 ° C, and the reaction time is 2 hours.
~ 6 hours.

[0015] The spherical organic fine powder prepared by the soap-free polymerization method as described above has low hygroscopicity, does not easily aggregate, and has high uniformity. Further, it becomes easy to adjust the charge amount of the coated inorganic particles prepared using such a spherical organic fine powder.

The makeup cosmetic of the present invention contains coated inorganic particles having a spherical organic fine powder adhered to the outer periphery.
The coated inorganic particles are prepared by a spray drying method. For example, when using a spherical organic fine powder prepared by a soap-free polymerization method or the like, the inorganic particles are put into an aqueous medium by adding inorganic particles into an aqueous medium in which the spherical organic fine powder is dispersed. Prepare a dispersed dispersion. At this time, as the aqueous medium in which the spherical organic fine powder is dispersed, the spherical organic fine powder can be separated from the reaction solution and used by newly dispersing it in the aqueous medium. Instead, it is preferable to use the dispersion obtained in this preparation step as it is.

The spherical organic fine powder is usually 1 to 40 parts by weight, preferably 1 to 3 parts by weight, based on 100 parts by weight of the inorganic particles.
It is used in an amount of 0 parts by weight, more preferably 5 to 20 parts by weight.

The dispersion in which the spherical organic fine powder and the inorganic particles thus prepared are dispersed is dried with a spray drier. The spray drier disperses the dispersion,
This is a device for atomizing and spraying a hot gas or the like into a drying chamber such as a hot gas chamber or a hot cylinder, and instantaneously evaporating and drying volatile components (eg, water) in the dispersion. Here, the temperature of the hot air that blows the dispersion liquid into the drying chamber is usually set to a temperature equal to or higher than the boiling point of the dispersion medium. However, when an aqueous medium is used, the temperature of the hot air falls within the range of 120 to 200 ° C. It is preferable to set The drying conditions are set so that the temperature of the gas exhausted after being blown by the above-described hot air falls within the range of 60 to 100 ° C. That is, it is preferable to set the spray drying conditions so that the temperature difference between the hot air for supplying the dispersion to the dryer and the exhaust gas is about 50 to 100 ° C.

In the coated inorganic particles prepared by the spray drying method in this way, spherical organic fine powder is adhered around inorganic particles as a nucleating agent, and the spherical organic fine powder adhered to the outer periphery is The spherical shape is maintained almost as it is. FIGS. 1 to 4 show electron micrographs of the surface of the coated inorganic particles on which the spherical organic fine powder is adhered. In FIG. 1, talc having an average particle diameter of 5 μm is used as the core inorganic particles, and in FIGS. 2 and 3, the average particle diameter is 4 μm.
In FIG. 4, the average particle size is 1 mica.
0 μm sericite is used. As the spherical organic fine powder, a polymethyl methacrylate fine powder prepared by a soap-flow polymerization method is used.
The average particle size of this poly (methyl methacrylate) fine powder is 0.1.
4 μm. The mixing weight ratio between the core inorganic particles and the spherical organic fine powder is 95: 5.

As can be seen from the photographs at the top (× 1000) of FIGS. 1 to 4, the outer periphery of the core inorganic particles is almost uniformly covered with the spherical organic fine powder. And the lower row (× 50
As can be seen from the photograph of (00), in the case of the coated inorganic particles, the spherical organic fine powder adheres to the surface of the core inorganic particles while essentially maintaining its shape. It is considered that this spherical organic fine powder is mainly adhered to the surface of the core inorganic particles by an electric locking force. 1 to 4
The figure shows an aspect in which a relatively small amount of a spherical organic fine powder having a relatively small diameter is used, and shows a state in which the spherical organic fine powder is deposited on the surface of the core inorganic particles at a relatively low density. By adjusting the diameter and the amount of the spherical organic fine powder, the spherical organic fine powder can also be applied in a layered (or wall) manner on the surface of the core inorganic particles.

As described above, the spherical organic fine powder is applied by the spray drying method, and physical stress is not positively applied to the spherical organic fine powder during the application. At the time of wearing, the spherical organic fine powder (further, the core inorganic particles) is not deformed or broken. In this respect, for example, it has a fundamentally different structure from coated particles formed by mixing and compression as described in JP-A-61-257908.

In the makeup cosmetic of the present invention,
The coated inorganic particles as described above are usually 1 to 70% by weight,
It is preferably 10 to 60% by weight, particularly preferably 20 to 5% by weight.
It is contained in an amount of 0% by weight.

[0023] Makeup cosmetics are generally oily,
There are aqueous and solid forms, and the coated inorganic particles as described above can be incorporated into any form of cosmetic.

The makeup cosmetic of the present invention is blended with other components generally used in cosmetics according to its use. For example, in the case of a foundation, it includes an oily base, a coloring agent, a fragrance, a dispersant, and the like. If necessary, an antioxidant, a plasticizer, a solvent and the like may be added.

Examples of the oily base include liquid paraffin, lanolin, squalane, isopropylidyl sebacate, beeswax, etc. Examples of the coloring agent include titanium oxide, kaolin, calcium carbonate, magnesium carbonate and the like. , Magnesium silicate, silicic anhydride, zinc oxide, red iron oxide, yellow iron oxide, black iron oxide, chromium oxide, chromium hydroxide, carbon black, gunjou, metal soap (eg magnesium stearate, calcium stearate, zinc laurate) , Fish scale foil, red pigment, β-carotene, cochineal, chlorophyll and the like. Further, a surfactant such as polyoxyethylene sorbitan monooleate, esters such as diisostearyl malate, a fungicide such as butyl paraoxybenzoate, and the like can be added.

The makeup cosmetic of the present invention can be produced by uniformly mixing the above components. This mixing can be performed while heating as required.

[0027] The makeup cosmetic of the present invention comprises an oily foundation, an emulsion foundation, a creamy foundation, a solid (cake) type foundation,
It can be used as lipstick, blusher, eyeliner, eyeshadow, mayuzumi, powdered paste, solid paste, etc.

[0028]

Since the makeup cosmetic of the present invention contains specific coated inorganic particles, it has good spreadability (extensibility), covering power (concealing properties) and close contact, and has uneven stripes (or uneven color). ) Is less likely to occur and the finish is beautiful.

[0029]

Next, the present invention will be specifically described with reference to examples, but the present invention should not be construed as being limited to these examples.

[0030]

Example 1 [Preparation of spherical organic fine powder by soap-free emulsion polymerization]
100 parts by weight of methyl methacrylate, 200 parts by weight of ion-exchanged water, 0.3 parts by weight of potassium persulfate and 0 parts by weight of vinyl alcohol were placed in a 1-liter four-necked flask equipped with a stirrer, a thermometer, a nitrogen gas inlet tube and a reflux condenser. .1
The reaction was carried out at 80 ° C. for 5 hours in a nitrogen stream with stirring.

After the polymerization reaction, the reaction solution was cooled to obtain a dispersion in which particles (spherical organic fine powder) having an average particle size of 0.35 μm were dispersed. The nonvolatile content in this dispersion was 33% by weight.

[Preparation of talc having outer peripheral wall] 200 parts by weight of talc having an average particle diameter of 5 µm and ion-exchanged water 2 were added to 100 parts by weight of the dispersion obtained as described above.
The mixture was mixed at a ratio of 00 parts by weight, and the mixture was stirred well to sufficiently disperse the spherical organic fine powder and talc in the dispersion medium.

The dispersion thus prepared was heated at a hot air temperature of 1
Dry using a spray drier set at 80 ° C. and exhaust air temperature of 80 ° C., and talc particles (core inorganic particles)
To obtain coated talc particles (talc-treated body) in which a spherical organic fine powder is adhered to the periphery. An electron micrograph showing the particle structure of the coated talc particles is shown in FIG. In FIG. 1, the upper magnification is 1000 times and the lower magnification is 500 times.
It is 0 times.

The ratio of the talc content to the spherical organic fine powder content measured from the electron micrograph was 95: 5. [Production of Powder Foundation] The coated talc particles obtained as described above were mixed with the following components, pulverized and molded to produce a powder foundation.

Ingredient Content (parts by weight) Coated talc particles 45.0 Mica 30.0 Titanium dioxide 8.0 Coloring pigment 2.4 butyl paraoxybenzoate 0.2 POE sorbitan monooleate 1.0 squalane (squalane) 1.0 Diisostearyl malate 5.0 Perfume 0.4 Magnesium stearate 2.0 As described above The powder foundation thus manufactured was used by 10 subjects, and the foundation was evaluated for “spread”, “covering power”, “closeness”, “streak unevenness”, and “finish”. Table 1 shows the results.

The meanings of the symbols in Table 1 are as follows.・ Expansion 90% of the examinees felt comfortable to spread ... ◎ 70% of the subjects felt comfortable to grow ... ○ 50% of the subjects Those who felt that the spread was good ... △ 30% of the subjects felt that it was good ... × ・ Coverage 90% of the test subjects felt that the cover was good What
・ ◎ 70% of the examinees felt that the coverage was good
・ ○ 50% of the subjects felt that the covering power was good ・ ・
・ △ 30% of the examinees felt that the coverage was good.
・ × ・ Adhesion 90% of the examinees feel that the adhesion is good ...
◎ What 70% of the examinees felt good in adhesion
○ What 50% of the examinees feel good in contact ...
△ What 30% of the examinees felt good feeling of adhesion ...
× ・ Streak unevenness 10% of the subjects suffered streaks ・ ・ ・ ◎ 30% of the subjects suffered streaks ・ ・ ・ ○ 50% of subjects In the case where streaks occurred in the subject ... △ In the case where streaks occurred in 90% of the subjects ・ ・ ・ × ・ Finish The subject which 90% of the subjects felt good in the finish ・ ・
・ ◎ 70% of the examinees felt that the finish was good
・ ○ 50% of the subjects felt that the finish was good
・ △ 30% of the examinees felt that the finish was good
・ ×

[0037]

[Example 2] [Preparation of mica having outer peripheral wall] In Example 1, 200 parts by weight of mica having an average particle diameter of 5 µm and ion exchange were added to 100 parts by weight of the dispersion obtained by preparation of the spherical organic fine powder. Water was mixed at a ratio of 200 parts by weight, and the mixture was stirred well to sufficiently disperse the spherical organic fine powder and mica in the dispersion medium.

The dispersion thus prepared was dried using a spray drier in the same manner as in Example 1, and coated with mica particles (core inorganic particles) coated with spherical organic fine powder (core inorganic particles). Mica treated body) was obtained. FIG. 2 shows an electron micrograph showing the particle structure of the coated mica particles. In FIG. 2, the magnification at the top is 1000 times and the magnification at the bottom is 5000 times.

The ratio of the mica content to the content of the spherical organic fine powder actually measured from the electron micrograph was 95: 5. [Production of Powder Foundation] The coated mica particles obtained as described above were mixed with the following components, pulverized and molded to produce a powder foundation.

Ingredient Content (parts by weight) Coated mica particles 30.0 Talc 45.0 Titanium dioxide 8.0 Coloring pigment 2.4 butyl parahydroxybenzoate 0.2 POE sorbitan monooleate 1.0 squalane 1.0 1.0 Diisostearyl malate 5.0 Perfume 0.4 Magnesium stearate 2.0 The powder foundation manufactured as described above was used by a subject in the same manner as in Example 1, and the foundation was "spread", "covering power", "closeness", and "streak".
And "finish" was evaluated. Table 1 shows the results.

FIG. 3 shows an electron micrograph of the coated mica particles prepared by changing the ratio of the mica content to the content of the spherical organic fine powder. The powder foundation prepared by using the coated mica particles and having the same composition as described above was excellent in “growth”, “covering power”, “closeness”, “stripe unevenness”, and “finish”.

[0042]

Example 3 [Production of powder foundation] The coated talc particles and the coated mica particles prepared in Examples 1 and 2 were mixed with the following components, pulverized and then molded to produce a powder foundation.

Component Content (parts by weight) Coated talc particles 45.0 Coated mica particles 30.0 Titanium dioxide・ ・ ・ 8.0 Color pigment ・ ・ ・ ・ ・ ・ 2.4 Butyl paraoxybenzoate ・ ・ ・ ・ 0.2 POE Sorbitan monooleate ・ 1.0 Squalane ・ ・ ・ ・ ・ ・1.0 Diisostearyl malate 5.0 Perfume 0.4 Magnesium stearate 2.0 Above The powder foundation produced as described above was used by a subject in the same manner as in Example 1, and the foundation was found to have “expansion”, “covering power”, “closeness”, and “streak”.
And "finish" was evaluated. Table 1 shows the results.

[0044]

[Example 4] [Preparation of sericite having outer peripheral wall] In Example 1, 200 parts by weight of sericite having an average particle diameter of 5 µm was added to 100 parts by weight of the dispersion obtained by preparing the spherical organic fine powder. The spherical organic fine powder and sericite were well dispersed in a dispersion medium by mixing and mixing well in a ratio of 200 parts by weight of ion-exchanged water.

The dispersion thus prepared was dried using a spray drier in the same manner as in Example 1 to obtain a coated sericite having spherical organic fine particles adhered around sericite particles (nuclear inorganic particles). Particles (treated with sericite) were obtained. An electron micrograph showing the particle structure of the coated sericite particles is shown in FIG. In FIG. 4, the magnification at the top is 1000 times and the magnification at the bottom is 5000 times.

The ratio of the content of sericite to that of the spherical organic fine powder actually measured from the electron micrograph was 95: 5. [Production of powder foundation] The coated talc particles, coated mica particles and coated sericite particles obtained as described above were mixed with the following components, pulverized, and then molded to produce a powder foundation.

Component Content (parts by weight) Coated talc particles 45.0 Coated mica particles 10.0 Coated sericite particles ··· 20.0 Titanium dioxide ······ 8.0 Color pigment ···· 2.4 Butyl paraoxybenzoate ··· 0.2 POE mono Sorbitan oleate 1.0 Squalane 1.0 Diisostearyl malate 5.0 Fragrance 0 2.4 Magnesium stearate... 2.0 The powder foundation produced as described above was used by a subject in the same manner as in Example 1, and “foundation”, “covering power”, and “closeness” of the foundation were applied. , "Sujimura"
And "finish" was evaluated. Table 1 shows the results.

[0048]

Comparative Example 1 [Production of foundation] A powder foundation was produced in the same manner as in Example 1, except that talc having no outer peripheral particle wall was used as it was in place of the coated talc particles. The composition of this powder foundation is shown below.

Component content (parts by weight) Talc ... 45.0 Mica ... 30.0 Titanium dioxide ... 8.0 Coloring pigment 2.4 Butyl paraoxybenzoate 0.2 POE Sorbitan monooleate 1.0 Squalane 1.0 Diisostearyl malate 5.0 Perfume 0.4 Magnesium stearate 2 2.0 The powder foundation produced as described above was used by a subject in the same manner as in Example 1, and the foundation was set to have “expansion”, “covering power”, “closeness”, and “streak”.
And "finish" was evaluated. Table 1 shows the results.

[Brief description of the drawings]

FIG. 1 is an electron micrograph showing the particle structure of coated talc particles.

FIG. 2 is an electron micrograph showing the particle structure of the coated mica particles.

FIG. 3 is an electron micrograph showing the particle structure of the coated mica particles.

FIG. 4 is an electron micrograph showing the particle structure of coated sericite particles.

Continuation of front page (72) Inventor Noriyuki Osaka 130 Kamihirose, Sayama-shi, Saitama Soken Chemical Co., Ltd. Sayama Works (56) References JP-A-63-93707 (JP, A) JP-A-63-126813 ( JP, A) JP-A-1-47711 (JP, A) JP-A-63-30313 (JP, A) JP-A-63-27410 (JP, A) JP-A-63-208511 (JP, A) JP-A-61-69708 (JP, A) JP-A-56-68604 (JP, A) JP-A-63-179972 (JP, A) JP-A-63-199273 (JP, A) JP-A-1-63035 (JP, A) , A) JP-A-63-27414 (JP, A) JP-A-61-257908 (JP, A) JP-A-3-181411 (JP, A) JP-A-4-230306 (JP, A) (58) Surveyed field (Int.Cl. ⁷ , DB name) A61K 7/02

Claims (4)

(57) [Claims] 1. A Mei caps cosmetic containing the coated inorganic particles, the coated inorganic particles, an average particle diameter 1~30μ
m of core inorganic particles and spherical organic fine powder adhered to the outer periphery of the core inorganic particles, and 1/10 of the core inorganic particles
A makeup cosmetic, wherein the spherical organic fine powder having the following average particle diameter is adhered to the outer periphery of the core inorganic particles by a spray drying method. 2. The method according to claim 1, wherein the spherical organic fine powder is a powder prepared by a soap-free polymerization method.
The makeup cosmetic according to the item. 3. An amount of 1 to 40 with respect to 100 parts by weight of nuclear inorganic particles.
2. The makeup cosmetic according to claim 1, wherein the spherical organic fine powder is applied by a spray drying method using a part by weight of the spherical organic fine powder. 4. The method according to claim 1, wherein the spherical organic fine powder is provided around the outer periphery of the core inorganic particles.
The makeup cosmetic according to any one of claims 1 to 3, wherein the makeup is applied in a wall shape while maintaining the form of the powder .