JP2012167052A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cosmetic that attains both natural finish and covering performance.SOLUTION: The cosmetic contains a component (A) flaky glass including a metal oxide fine particle and a component (B) an orientation improvement agent for containing an orientation of the flaky glass, wherein the component (B) contains at least a boron nitride.

Description

  The present invention relates to a cosmetic.

Conventionally, cosmetics containing flaky glass are known.
For example, Patent Document 1 describes flaky glass in which metal oxide fine particles such as titanium oxide are dispersed in an amount of 1 to 60% by weight in the form of single particles. This flaky glass is said to have high ultraviolet shielding ability, high transparency to visible light, and high surface smoothness.

  Boron nitride is known to be used for cosmetic applications (for example, Patent Documents 2 to 7).

JP-A-7-315859 JP 2001-58925 A JP 2002-212032 A JP 2003-55151 A JP 2006-151917 A JP 2006-151918 A JP 2010-77043 A

  However, in the cosmetic as described in Patent Document 1, the blended flaky glass (glass powder) tends to adhere to the skin although it has smoothness, and the orientation of the glass powder is disturbed on the skin. It was difficult to form a coating film. Also, the orientation is disturbed due to the variation in the size of the flake glass, and the edge portion of the glass powder appears on the surface of the coating film, so that light scattering occurs at the edge or the light reflection is inhibited. The gloss properties of glass cannot be fully exhibited. Furthermore, since the glass powder is not oriented like a coating film, the light transmission is also inhibited. Therefore, the effect of controlling the light transmission by the inclusion of the metal fine particles has not been sufficiently obtained. That is, the conventional cosmetics cannot sufficiently exhibit the optical function of the flaky glass enclosing the metal fine particles, so the glass powder has smoothness and transparency, but it is expected when blended in cosmetics. There was no improvement in glossiness and covering power.

  The present invention has been made in view of the above circumstances, and its object is to improve the orientation of glassy flakes and improve the ability to form a film (adhesiveness) when applied to the skin. An object of the present invention is to provide a cosmetic that can exhibit both an optical function, in particular, gloss properties and light transmission controllability, and can achieve both a natural finish and a covering power.

According to the present invention, the following components:
(A) Flaked glass containing metal oxide fine particles (B) containing an orientation improver that improves the orientation of the flaky glass,
A cosmetic is provided in which the component (B) contains at least boron nitride.

  According to this invention, by using boron nitride in combination with the flake glass, the orientation of the flake glass when applied to the skin is improved, so that the adhesion to the skin is improved and the flake glass has Gloss characteristics and light transmission controllability can be fully exhibited, and gloss and blurring effects can be imparted to the skin in a well-balanced manner. Therefore, a cosmetic that can achieve both a natural finish and covering power can be realized.

  ADVANTAGE OF THE INVENTION According to this invention, the cosmetics which can make a natural finish and cover power compatible are provided.

It is a figure explaining the effect of this invention.

Embodiments of the present invention will be described below.
The present invention contains a flaky glass containing component (A) metal oxide fine particles and a component (B) an orientation improver for improving the orientation of the flaky glass, and component (B) contains at least boron nitride. , Cosmetics.

First, the component (A) will be described.
As the flaky glass of the component (A), glass flakes generally used in cosmetics and those containing metal oxide fine particles can be used. Encapsulating metal oxide fine particles means that the metal oxide fine particles are included in the particle material. That is, the flaky glass of the present invention does not include particles whose surface is coated with a single layer or multiple layers with a metal oxide fine particle layer. The metal oxide fine particles are preferably dispersed well and uniformly in the particle material.
The surface of the flaky glass is preferably smooth. The degree of “smoothness” can be expressed by the surface roughness Ra, and is preferably 100 nm or less, particularly 1 to 20 nm. If it is within this range, the light scattering due to the unevenness is suppressed, so that the gloss is not impaired. The surface roughness Ra can be measured using a field emission electron beam three-dimensional roughness analyzer ERA-8900FE (manufactured by Elionix).

The shape of the flaky glass is not limited, but is preferably a plate shape. The thickness of the flaky glass is preferably 0.4 to 2 μm, and if it is 0.7 to 1.5 μm, the skin is glossy, color unevenness and pore concealment (covering power), natural The finish and covering power can be obtained, and the orientation can be effectively improved by combination with boron nitride, which is more preferable. When the thickness of the flaky glass is 2 μm or less, the feeling of use is good without impairing roughness during coating. On the other hand, when it is 0.4 μm or more, gloss and covering power are improved without impairing surface smoothness. Moreover, it is preferable that an average particle diameter is 1-500 micrometers. The average aspect ratio is preferably 10 to 100, and if it is 5 to 25, a natural finish and covering power can be obtained, and the combination with boron nitride can effectively improve the adhesion to the skin. preferable.
In the present specification, “average particle size” means a particle size of 50% cumulative volume of particle size distribution measured by a laser scattering method.
In the case of flaky glass, the particle size is a value represented by the square root of the area S when the flaky glass is viewed in plan. The average thickness is an average of n = 50 samples measured with a scanning electron microscope, and the average aspect ratio is a value represented by (average particle diameter / average thickness).

  The metal oxide fine particles contained in the flaky glass may be a metal oxide obtained by oxidizing one or more metals selected from the group consisting of Ti, Sn, Si, Fe, Zr, Al, Zn, and Ce. preferable. In addition, the shape of the metal oxide fine particles is not particularly limited, and examples thereof include a spherical shape, a hollow shape, a porous shape, a rod shape, a fiber shape, a plate shape, and an indefinite shape. Among these, a spherical shape is preferable. The average particle size is preferably 10 to 300 nm. Their existence can be known by X-ray diffraction.

The flaky glass preferably contains at least (A-1) titanium oxide (TiO ₂ ) as metal oxide fine particles. Commercially available products such as titanium oxide-encapsulated silica flakes; TSG30, NTS30K3TA, NPT30K3TA (manufactured by Nippon Sheet Glass Co., Ltd.) can be used as the titanium oxide-encapsulated flake glass.

In addition to the component (A-1), it is more preferable to encapsulate (A-2) iron oxide (Fe ₂ O ₃ ) and (A-3) titanium / iron composite oxide in flaky glass. . Component (A-3) titanium-iron composite oxide is composed of pseudo brookite (Fe ₂ TiO ₅ ) and urbo spinel (Fe ₂ TiO ₄ ) formed by firing component (A-1) and component (A-2). In addition, it is preferably made of a complex oxide such as ilmenite (FeTiO ₃ ), and more preferably made of pseudo brookite. By combining the white color of component (A-1), the red color of component (A-2), and the yellow color of component (A-3), the skin color is absorbed while absorbing the short and medium wavelength components of the incident light. The permeability which exhibits can be improved. Accordingly, it is possible to give the skin a covering power due to the blurring effect while coloring it in a natural skin color. The titanium-iron composite oxide-encapsulated flake glass encapsulating such component (A-1), component (A-2), and component (A-3) is referred to as “composite oxide-encapsulated glass” in this specification. It is called “flakes”. Examples of the composite oxide-encapsulating glass flake include those described in JP-A-7-330542. Moreover, it is preferable to use the following complex oxide inclusion glass flakes.

The composite oxide-encapsulated glass flakes have a straight transmittance T _{(650) at 650} nm of 0.7 to 1.5, a straight transmittance T _{(550) at 550} nm of 0.6 to 1.4, and 450 nm. It is preferable that the straight-line transmittance T ₍₄₅₀₎ is 0.5 to 1.1 and that T ₍₄₅₀₎ <T ₍₅₅₀₎ ≦ T ₍₆₅₀₎ . Moreover, T ₍₆₅₀₎ is 0.75 to 1.20, and T ₍₅₅₀₎ is 0.75 to 1 from the point that light is absorbed on the short and medium wavelength side and long wavelength light is scattered in the skin. More preferably, T ₍₄₅₀₎ is 0.60 to 0.90. The straight transmittances T ₍₆₅₀₎ , T ₍₅₅₀₎ , and T ₍₄₅₀₎ are 15 mg with a sponge on a 10 × 15 cm fine-adhesive film (manufactured by Exeal Corporation) using 1 μm thick flaky glass. The sample is prepared by applying a variable angle spectral reflectance measuring instrument GCMS-4 (manufactured by Murakami Color Research Co., Ltd.), and in the transmission measurement mode, the opal plate is adjusted as a standard calibration plate, the incident angle is 0 degree, It is a value measured under a measurement condition with a transmission angle of 15 degrees.

The composite oxide-encapsulated glass flakes have a glossiness of G _(45-0) when the incident angle is 45 degrees and the light receiving angle is 0 degree, the incident angle is 45 degrees, and the light receiving angle is 45 degrees. when the glossiness was _{G (45-45), 2.0 ≦ G} (45-45) / G (45-0) is preferably represented by ≦ 5.0. Further, the lower limit of G _(45-45) / G _(45-0) is more preferably 3.5 or more in consideration of the angle dependency, and the upper limit is more preferably 4.8 or less. In addition, glossiness means what was measured using the variable angle spectroscopic measurement system (Murakami Color Research Laboratory make, GCMS-4).

  Furthermore, the composite oxide-encapsulated glass flakes preferably have a total transmittance (Tt) of 60% or more and a haze value (H) of 60% or more. The haze value (H) is more preferably 70% or more, and particularly preferably 80% or more. In cosmetics containing such flaky glass, a higher blurring effect can be obtained against pores and uneven skin color. Accordingly, it is possible to show a moderate soft soft gloss that is not glaring. The upper limit of the haze value is not particularly limited, but can be 95% or less, for example. The total transmittance (Tt) is a powder dispersion containing 20% by mass of flaky glass by mixing flaky glass and amino-modified silicone (SF8417, manufactured by Toray Dow Corning) with a Hoovermarler. A medium is prepared, the powder dispersion medium is formed on a glass plate with a coater so as to have a thickness of 15 μm, and the obtained powder dispersion film is measured in accordance with ISO13468-1. Further, the haze value is a value obtained by measuring the above powder dispersion film in accordance with ISO14782.

The hue angle of the composite oxide-encapsulating glass flakes can be set to 50 degrees to 75 degrees, and more preferably 55 degrees to 70 degrees. Thereby, skin can be colored with natural skin color. In the present invention, the hue angle is obtained by putting a dedicated cell (Powder Cell CR-A50, manufactured by Minolta Co., Ltd.), measuring a ^* value and b ^* value using a color difference meter (CR-300 manufactured by Minolta Co., Ltd.). The value calculated based on the following formula (1) using the obtained a ^* value and b ^* value.
Hue angle (h ^* ) = tan ⁻¹ (b ^* / a ^* ) (1)

  The composite oxide-encapsulating glass flake can be produced as follows. First, the titanium (Ti) content in the composite oxide-encapsulated glass flake is 7% by mass to 38% by mass in terms of titanium oxide, and the iron (Fe) content in the complex oxide-encapsulated glass flake is iron oxide. In terms of 2 to 13 mass%, the particulate (a1) titanium raw material and (a2) iron raw material are blended with the (a4) silica raw material as the base material. The ratio of the titanium content and the iron content in the composite oxide-encapsulated glass flakes is preferably 2.5: 1 to 10: 1 in terms of the mass ratio of titanium oxide and iron oxide. (A1) As the titanium raw material, titanium compounds such as alkoxide, titanium oxide fine particles, and titania sol can be used. In addition, (a2) iron raw materials may be iron ions such as nitrates, iron compounds such as alkoxides, iron-containing colloids, iron oxide colloids, or iron oxide fine particles. (A1) The average particle diameter of the titanium raw material is preferably 1 to 100 nm, particularly preferably 10 to 100 nm. Moreover, it is preferable that the average particle diameter of the (a2) iron raw material is 100 to 300 nm.

  Silica sol is preferably used as the silica raw material of component (a4). For example, a silica sol can be used as the component (a4), a titanium near sol as the component (a1), and iron oxide fine particles as the component (a2) to prepare a sol solution.

  The sol liquid may contain any of water, an organic solvent, and a catalyst. The organic solvent is preferably a water-soluble organic solvent, and examples thereof include alcohols such as methanol, ethanol, propanol, and butanol, ketones, and esters. As the catalyst, an acid catalyst or a base catalyst is used. The acid catalyst is preferably a protonic acid, and specifically includes nitric acid, hydrochloric acid, acetic acid, trifluoroacetic acid, trichloroacetic acid, citric acid, sulfuric acid, phosphoric acid, and toluenesulfonic acid. Although the addition amount of an acid is not specifically limited, 0.001-2 are preferable by molar ratio with respect to the silica raw material of a component (a4). As the base catalyst, potassium hydroxide or sodium hydroxide can be used.

  In addition, an organic thickener or the like may be added to change the characteristics of the sol solution.

  Next, the prepared sol solution is applied to the surface of a substrate, preferably a substrate having a smooth surface, using a known technique (for example, JP-A-07-315859, JP-A-91-110452, etc.). . At this time, it may be applied so as to form a thin film of a sol solution of 0.06 to 50 μm on the substrate. The material of the substrate can be metal, glass or plastic. The silica sol thin film thus formed shrinks when dried, but the substrate does not shrink. Therefore, cracks occur in the film, and an unfired flaky glass can be obtained.

  Thereafter, the unfired composite oxide-encapsulated glass flakes are heat-treated. The temperature and time of the heat treatment are such that the component (a2) iron raw material reacts with the surface of the component (a1) titanium raw material to produce the component (a3) titanium-iron composite oxide, particularly pseudo brookite, It is sufficient if the matrix containing the silica raw material (a4) is transferred to glass. Specifically, it can be heated at 700 to 1200 ° C. for 10 minutes to 24 hours, and more preferably 900 to 1100 ° C. for 5 to 10 hours.

  By firing in this way, the silica raw material of component (a4) becomes the fired (a4) silica glass, and the iron raw material of component (a2) reacts with the surface of the titanium raw material of component (a1) to produce component (A- The titanium raw material of the component (a1) that has not reacted with the component (a2) after the titanium / iron composite oxide of 3) is formed becomes the titanium oxide of the component (A-1) and reacts with the component (a1). The iron raw material of the component (a2) which did not become iron oxide of a component (A-2). The component (A-1) titanium oxide, the component (A-2) iron oxide, and the component (A-3) titanium-iron composite oxide are formed by the component (A-4) silica glass. Encapsulated flaky glass having a smooth surface (composite oxide-encapsulated glass flakes) is obtained. The inclusion ratio of the metal oxide (the total of the inclusion ratio of the component (A-1), the inclusion ratio of the component (A-2), and the inclusion ratio of the component (A-3)) with respect to the entire composite oxide-encapsulated glass flake is From the viewpoint of nature and covering power, it is preferably 10% by mass or more, particularly preferably 20% by mass or more. Moreover, it is preferable to set it as 55 mass% or less from a viewpoint of manufacturability, and 50 mass% is more preferable. Content of (A-4) silica glass in flake shaped glass can be 50-90 mass%, for example. It has been confirmed that the average particle diameters of titanium oxide and iron oxide are almost the same before and after firing.

  In this invention, it is preferable to make the whole cosmetics contain 0.1-40 mass% flake shaped glass of a component (A). The flaky glass can be used after appropriately hydrophobizing depending on the purpose of the cosmetic to be contained. Examples of the hydrophobizing treatment include methylhydrogenpolysiloxane, high-viscosity silicone oil, treatment with a silicone compound such as a silicone resin, treatment with a surfactant such as an anionic surfactant and a cationic surfactant, nylon, polymethyl methacrylate, Treatment with polymer compounds such as polyethylene, Teflon (registered trademark), polyamino acid, treatment with fluorine compounds such as perfluoroalkyl phosphate ester, perfluoroalkylsilane, lecithin, collagen, metal soap, lipophilic wax, polyhydric alcohol Examples of the method include treatment with a partial ester or a complete ester. Generally, any method can be used as long as it is applicable to the hydrophobizing treatment of powder, and the method is not limited to these methods.

  Further, the content of the flaky glass is preferably appropriately changed depending on the form of the cosmetic. For example, in the case of a powder solid such as a powder foundation or an osmotic powder or a powder cosmetic, the flaky glass is added to the entire powder solid. 5 to 40% by mass, particularly 0.5 to 20% by mass, and further 0.5 to 15% by mass gives an appropriate gloss to the skin, concealment of color unevenness and pores (covering power), And preferred in terms of use. In the case of a water-in-oil emulsion or an oil-in-water emulsion, 0.1 to 20% by mass, particularly 0.3 to 10% by mass, more preferably 0.3 to 5% by weight of flaky glass in the whole emulsion. It is preferable to contain it in terms of imparting gloss, color unevenness and pore concealability (covering power), stability, and feeling during use.

Next, component (B) will be described.
The component (B) improves the orientation of the flaky glass and needs to contain at least boron nitride. However, only boron nitride may be used as the component (B), or boron nitride and other components may be used. You may use together with an orientation improving agent. The average particle size of the orientation improver is preferably 1 to 25 μm because the orientation of the flaky glass can be improved and the adhesion to the skin can be effectively improved. Examples of orientation improvers other than boron nitride include inorganic plate powders such as talc, mica, silica, and bismuth oxychloride, and organic plate powders such as Nε-lauroyl lysine and N-lauroyl taurine calcium. Of these, mica and talc are particularly preferable.

  The boron nitride of component (B) used in the present invention can be used without particular limitation as long as it is generally used in cosmetics. Examples of the form of boron nitride include hexagonal crystals, wurtzite structures, cubic crystals, rhombohedral crystals, and turbostratic structures, but hexagonal crystals are most preferable from the viewpoint of usability. In the present invention, from the viewpoint that the orientation of the flaky glass can be effectively improved, those having an average particle diameter of 3 to 18 μm are preferable, and from the viewpoint of obtaining a natural luster, it is 3 to 12 μm. More preferably, it is 5-10 micrometers. Examples of such commercially available products include SHP-3 (average particle size 5.3 μm) and SHP-6 (average particle size 9.6 μm) manufactured by Mizushima Alloy Iron Co., Ltd.

The content of boron nitride is preferably 3 to 35% by mass with respect to the entire cosmetic, and if it is 5 to 30% by mass, the orientation of the flaky glass is effectively improved and the flake glass is improved. It is more preferable because the optical characteristics can be sufficiently exhibited.
The ratio of boron nitride to (A) metal oxide-encapsulated flake glass (boron nitride / A) improves the adhesion of the flake glass when applied to the skin, thus improving the adhesion to the skin. From the point of making it, 1/1 to 150/1 is preferable, and 1/1 to 50/1 is particularly preferable, and 2/1 to 25/1 is more preferable.

  Although the orientation improver of component (B) may be used as it is, in order to improve the water repellency and the sustainability of cosmetics, the same fluorine compound treatment and silicone compound as the metal oxide-encapsulated flake glass of component (A) Surfaces such as treatment and metal soap treatment can be applied. In particular, by performing silicone treatment, water repellency can be imparted without impairing the feeling of use of boron nitride.

  Further, the content of the orientation improving agent other than boron nitride is preferably 10 to 80% by mass relative to the entire cosmetic, and if it is 15 to 70% by mass, the effect of improving the orientation of the flaky glass by boron nitride. Can be improved.

The cosmetic of the present invention is used in various dosage forms according to conventional methods, and the dosage form is not particularly limited, but may be a water-in-oil cosmetic or an oil-in-water cosmetic. . Moreover, powder cosmetics, powder solid cosmetics, and oil-based solid cosmetics may be sufficient.
Further, the cosmetics are used as makeup cosmetics such as lotion, milky lotion, cream, ointment, aerosol cosmetics, base cosmetics, liquid foundation, powder foundation, white powder, powder eye shadow, lipstick and the like. The use as a base makeup cosmetic is more preferred. In the present invention, the base makeup cosmetic is selected from the group consisting of a foundation, an interesting, and a base cosmetic.

  In addition to the component (A) and the above-described colored pigment inclusion polymer, the cosmetic of the present invention includes, for example, inorganic powders other than those described above, organic powders, oily components, surfactants, water-soluble polyhydric alcohols, Other components that are usually used in cosmetics such as antioxidants, preservatives, thickeners, ultraviolet absorbers, and fragrances can be blended as needed. Listed below.

  Examples of the inorganic powder are those other than those included in the orientation improver, such as inorganic white pigments such as zinc oxide and titanium oxide; coloring of bengara, yellow iron oxide, black iron oxide, carbon black, ultramarine blue, etc. Examples of pigments include pearl pigments such as titanium oxide-coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, fish scale foil, and colored titanium oxide-coated mica.

  Examples of the organic powder include silicone powder, urethane powder, polyethylene powder, polystyrene powder, benzoguanamine resin powder, polytetrafluoroethylene powder, distyrenebenzene polymer powder, epoxy resin powder, acrylic resin powder, microcrystalline cellulose, Etc. In addition, these resin powders may be colored by coating, encapsulating, and coloring pigments, pigments, dyes, metal ions, and the like by ordinary methods. In particular, from the viewpoint of natural finish with covering power and transparency, a resin powder in which an inorganic pigment such as titanium oxide or iron oxide, zinc oxide or the like is dispersed can be preferably used. As such an encapsulating resin, polymer powders described in JP 2008-162941, JP 2003-192538, and the like can be used.

  Further, in the cosmetic of the present invention, the content of the total powder including the component (A) metal oxide-encapsulated flake glass and the component (B) compounding improver is 60 in the case of powder cosmetic and powder solid cosmetic. It is preferable that it is -99 mass%, especially 85-98 mass%. In the case of emulsified cosmetics, the content is preferably 0.1 to 50% by mass.

  As the oil component, a solid, semi-solid or liquid oil component at 25 ° C. can be used. Specifically, squalane, paraffin wax, liquid paraffin, petrolatum, microcrystalline wax, ozokerite, ceresin, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, cetyl alcohol, hexadecyl alcohol, oleyl alcohol, 2- Cetyl ethylhexanoate, 2-ethylhexyl palmitate, 2-octyldodecyl myristate, neopentyl glycol di-2-ethylhexanoate, glycerol tri-2-ethylhexanoate, 2-octyldodecyl oleate, isopropyl myristate, tri Glycerol isostearate, coconut oil fatty acid glycerol, olive oil, avocado oil, camellia oil, jojoba oil, beeswax, whale wax, carnauba wax, myristyl myristate, mink Various hydrocarbons and lanolin, higher fatty acids, fats and oils, esters, higher alcohols, waxes and silicone oils such as volatile silicone and a nonvolatile silicone oil. In the case of powder cosmetics and powdered solid cosmetics, the content of these oily components is preferably 0.1 to 40% by mass, and particularly preferably 1 to 20% by mass, with respect to the total cosmetics. In the case of an emulsified cosmetic, it is preferably 1 to 60% by mass, particularly 10 to 50% by mass.

  Surfactants include polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene hydrogenated castor oil alkyl sulfate ester, polyoxyethylene alkyl sulfate ester, alkyl Examples thereof include phosphoric acid esters, polyoxyethylene alkyl phosphoric acid esters, fatty acid alkali metal salts, sorbitan fatty acid esters, and glycerin fatty acid esters. In the case of powder cosmetics and powdered solid cosmetics, the content of these oily components is preferably 0.1 to 20% by mass, particularly 1 to 10% by mass, based on the total cosmetics. In the case of an emulsified cosmetic, the content is preferably 0.5 to 20% by mass, particularly 1 to 15% by mass.

  The water-soluble polyhydric alcohol is a water-soluble polyhydric alcohol having two or more hydroxyl groups in the molecule. For example, ethylene glycol, propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, dipropylene glycol Glycerin, and polyglycerin such as diglycerin, triglycerin, tetraglycerin, glucose, maltose, maltitol, sucrose, fructose, xylitol, sorbitol, maltotriose, threitol, erythritol, amylolytic sugar reducing alcohol, etc. .

  Moreover, antioxidants, such as (alpha) -tocopherol; Preservatives, such as a butyl paraben and methyl paraben; Thickeners, such as a xanthan gum and carrageenan, etc. can be mix | blended suitably.

  Next, the effect of the present invention will be described with reference to FIG. In this invention, the orientation of the flake glass when applied to the skin is improved by using boron nitride (shown as BN) as an orientation improver together with the flake glass (shown as GF). FIG. 1 shows a model when flaky glass is applied on the skin. The flake glass is difficult to adhere to the skin, and the orientation of the flake glass is disturbed due to the difference between the size of the flake glass and the uneven structure of the skin, or the variation in the size of the flake glass itself. Further, when the thickness of the flaky glass is increased or the aspect ratio is decreased, the disorder of orientation becomes more remarkable. Since the flake glass can reflect the light L on a smooth surface, it has gloss characteristics. Moreover, by encapsulating metal fine particles (indicated as P in the figure) in the flaky glass, light (L) is transmitted, or light is scattered by reflecting light from the encapsulated metal fine particles, Light transmittance can also be controlled. However, when the orientation is disturbed, as shown in FIG. 1 (b), light scattering occurs at the edge, and reflection and transmission of light are hindered, so that the optical function of such glassy flakes can be sufficiently exhibited. I can't. On the other hand, by using glassy flakes together with boron nitride, as shown in FIG. 1A, the orientation of the glassy flakes is improved, and light reflection and light transmission can be controlled as designed.

  With such a mechanism, in the present invention, the orientation of the flaky glass when applied to the skin can be improved, so that the adhesion to the skin is improved and the gloss characteristics and light transmission of the flaky glass are improved. Controllability can be fully exerted, and gloss and blurring effects can be imparted to the skin in a well-balanced manner. Therefore, a cosmetic that can achieve both a natural finish and covering power can be realized.

  As mentioned above, although embodiment of this invention was described, these are illustrations of this invention and various structures other than the above are also employable.

Production Example 1 (Production of complex oxide-encapsulated flake glass)
A flaky glass was produced according to the following production example. The particle diameters of titania sol and iron oxide are average particle diameters measured by Microtrac (Nikkiso Co., Ltd.).
Silica sol (SiO _2, manufactured by Nippon Chemical Industrial Co., Ltd.) 233 g (70.0 wt%), titania sol (TiO _2, particle size 30 nm) 75 g (22.5 wt%), iron oxide _(Fe 2 _{O 3,} particle diameter 200 nm) 7.5 g (7.5 mass%) was mixed and cured at 50 ° C. for 18 hours to obtain a coating solution. The film was applied to a polyethylene terephthalate (PET) film having a width of 10 cm using a bar coater. Next, the PET film was placed in a drying furnace having an atmospheric temperature of 120 ° C. for 1 minute, and the thin film formed on the PET film was dried. Next, while spraying water at room temperature onto the PET film, the thin film was lightly rubbed with a felt or a scraper to peel off the PET film. The peeled thin film was dried at 80 ° C. for 24 hours and sintered at 1000 ° C. for 7 hours.

Production Example 2 (Production of complex oxide-encapsulated flake glass)
Silica sol (SiO ₂ ) 200 g (60.0 mass%), titania sol (TiO _2, particle diameter 30 nm) 100 g (30 mass%), iron oxide (Fe ₂ O ₃ , particle diameter 200 nm) 10 g (10 mass%) are mixed. Except that, it was the same as Production Example 1.

About the flake shaped glass obtained by manufacture example 1-2, it measured about the following items. The results are shown in Table 1.
1. Average thickness, average particle diameter Measured with a simple electron microscope (manufactured by Keyence Corporation).
2. Hue angle Placed in a dedicated cell (Minolta, powder cell CR-A50), measured a ^* value and b ^* value with a color difference meter (Minolta CR-300), and obtained a ^* value and b ^* Using the value, the hue angle was calculated based on the formula (1).
Hue angle (h ^* ) = tan ⁻¹ (b ^* / a ^* ) (1)
3. Straight transmittance 1 μm-thick flaky glass was used to prepare a sample by applying 15 mg with a sponge on a 10 × 15 cm fine-adhesive film (manufactured by Exeal Corporation), and a variable angle spectral reflectance measuring instrument GCMS- 4 (manufactured by Murakami Color Research Co., Ltd.), in the transmission measurement mode, the opal plate was adjusted as a standard calibration plate, and the measurement was performed under measurement conditions of an incident angle of 0 degree and a transmission angle of 15 degrees. The straight transmittance at a wavelength of 650 nm was T ₍₆₅₀₎ , the straight transmittance at a wavelength of 550 nm was T _(550), and the straight transmittance at a wavelength of 450 nm was T ₍₄₅₀₎ .
4). Haze value (H%), total transmittance (Tt%)
A powder dispersion medium in which flaky glass and amino-modified silicone (SF8417, Toray Dow Corning) are mixed with a Hoover Mahler so that the content of flaky glass is 20% by mass is coated on a glass plate with a coater of 15 μm. The film was formed to be With this haze meter HM-150 (manufactured by Murakami Color Research Co., Ltd.), this powder dispersion film is measured for haze value (H) according to ISO14782, and total transmittance (Tt) is measured according to ISO13468-1. did.
5. Glossiness Glossiness is a glossiness G _(45-0) with an incident angle of 45 degrees and a light receiving angle of 0 degrees using a variable angle spectroscopic measurement system (GCMS-4, manufactured by Murakami Color Research Laboratory _). G _(45-45) was measured for the glossiness when the incident angle was 45 degrees and the light receiving angle was 45 degrees, and G _(45-45) / G _(45-0) was determined.
6). Surface roughness (Ra)
It was measured by a field emission electron beam three-dimensional roughness analyzer ERA-8900FE (manufactured by Elionix).

Examples 1-5 and Comparative Examples 1-4
A powder foundation having the composition shown in Table 2 was prepared by the following method. The fluorine compound treatment in the table is a 5% by mass treatment of perfluoroalkyl phosphoric acid.
The components 19 and 20 are added to the components 1 to 18 which are uniformly stirred and mixed, and the components are mixed and stirred uniformly. The mixture was pulverized and pressed into a dish to obtain a powder foundation.
The sensory evaluation test method is to have 10 female panelists apply the test product to the skin and use each powder foundation, "color unevenness is not noticeable", "pores are not noticeable", "natural finish" The items of “preferably glossy (no glare)”, “beautiful finish” and “good” were evaluated according to the following evaluation criteria. The evaluation results are shown in Table 2.
(Evaluation criteria)
A: More than 7 people thought they thought B: 5-6 people thought they thought C: 3-4 people thought they thought D: Less than 2 people thought so

Examples 6-7
White powder (white) having the composition shown in Table 3 was prepared by the following method. The component 14 is added to the place where the components 1 to 13 are uniformly stirred and mixed, and the mixture is stirred and mixed uniformly. The fluorine compound treatment in the table is a 5% by mass treatment of perfluoroalkyl phosphoric acid. The mixture was pulverized and pressed into a dish to obtain white powder.
The sensory evaluation test methods were as follows: 10 female panelists applied the test product to their skin, and when using each of them, “color unevenness was inconspicuous”, “pores were inconspicuous”, “natural finish”, “ The items “beautiful finish” and “good” were evaluated according to the aforementioned evaluation criteria. The evaluation results are shown in Table 3. The obtained white powder was good in all of “good”, “uneven color inconspicuous”, “inconspicuous pores”, “natural finish”, and “beautiful finish”.

Claims (5)

The following ingredients:
(A) Flaked glass containing metal oxide fine particles (B) containing an orientation improver that improves the orientation of the flaky glass,
Cosmetics, wherein the component (B) contains at least boron nitride.   The cosmetic according to claim 1, wherein the boron nitride has an average particle size of 3 to 12 µm.   Cosmetics of Claim 1 or 2 whose content of the said boron nitride is 3-35 mass% with respect to this cosmetics whole.   Cosmetics of any one of Claims 1 thru | or 3 whose content of the said flaky glass is 0.1-40 mass% with respect to this whole cosmetics. The flaky glass contains the following component (A-1) titanium oxide (A-2) iron oxide (A-3) titanium / iron composite oxide as the metal oxide fine particles. The cosmetic according to item 1.

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