JP2007055949A - Cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic comprising ceramic particles and having good feeling of use, etc. <P>SOLUTION: The cosmetic comprises the ceramic particles in a base. The ceramic particles satisfy the requirement (I) and requirement (II): (I) ≥80 wt.% of the total amount of Al<SB>2</SB>O<SB>3</SB>or MgO and SiO<SB>2</SB>and (II) 0.1-15 weight ratio of the Al<SB>2</SB>O<SB>3</SB>or MgO to the SiO<SB>2</SB>[(Al<SB>2</SB>O<SB>3</SB>or MgO)/SiO<SB>2</SB>]. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cosmetic containing specific ceramic particles in a base material.

  Cosmetics are usually formulated with a base material containing oil, moisture, wax, etc., and makeup cosmetics such as foundation, white powder, blusher, eye shadow, eyebrow, body powder, baby powder, etc. It is used as body cosmetics.

  In cosmetic base materials, high-refractive white pigments such as zinc oxide (refractive index 2.0) and titanium oxide (refractive index 2.5 to 2.7) are used to hide the difference in brightness due to uneven skin color and uneven surface. Used as a masking agent. This is because a scattering phenomenon caused by a difference in refractive index between oil and wax (refractive index of 1.4 to 1.5) used in pigments and cosmetics and paints is effective in hiding color unevenness. However, since zinc oxide and titanium oxide have a refractive index that is too high and is inferior in transparency, for example, when blended in cosmetics, it may cause whitening or thick makeup. Appropriate light diffusivity is such that the difference in refractive index between the pigment and the oil / wax is about 0.02 to 0.4. From this point of view, barium sulfate (refractive index 1.65) is preferably used as an extender for cosmetics. (For example, Patent Document 1 and Patent Document 2).

Japanese Patent Laid-Open No. 6-171932 JP-A-8-59232

However, barium sulfate has to be devised such that it must be synthesized so that sulfide (S ²⁻ ) and soluble barium ions (Ba ²⁺ ) harmful to the human body do not elute (Patent Document 2). Moreover, since specific gravity is as high as 4.5, in order to express effective light diffusivity, you have to mix | blend highly.

  The present invention is a cosmetic material that is excellent in light diffusivity, light transmittance and safety, and contains ceramic particles having a low specific gravity in a base material, and has high concealability and a feeling of bare skin (transparency). The object is to provide excellent cosmetics.

As a means for solving the problems, the present invention provides a cosmetic containing ceramic particles in a base material, wherein the ceramic particles satisfy requirements (I) and (II).
(I) The total amount of Al ₂ O ₃ or MgO and SiO ₂ is 80% by weight or more.
(II) The weight ratio of Al ₂ O ₃ or MgO to SiO ₂ [(Al ₂ O ₃ or MgO) / SiO ₂ ] is 0.1 to 15.

As another means for solving the problems, the present invention provides a cosmetic containing ceramic particles in a base material, wherein the ceramic particles satisfy the following requirements (III) and (IV) in the flame: A cosmetic that is obtained by melting in the above is provided.
(III) The total amount of Al ₂ O ₃ or MgO and SiO ₂ is 80% by weight or more.
(IV) The weight ratio of Al ₂ O ₃ or MgO to SiO ₂ [(Al ₂ O ₃ or MgO) / SiO ₂ ] is 0.1 to 17.

  According to the present invention, the specific ceramic particles are excellent in light diffusibility and light transmittance, do not easily elute ions harmful to the human body, and have a low specific gravity. Further, it is possible to provide a cosmetic that is excellent in concealing property, light transmittance, and bare skin (transparent) feeling, and also has an excellent touch.

  The present inventors have found that ceramic particles of a specific composition are excellent in light diffusibility and safety and have a low specific gravity, and achieve the object of the present invention by adding the ceramic particles to a substrate. The cosmetics according to the following first aspect and second aspect have been completed.

[1] First Embodiment A first embodiment is a cosmetic comprising ceramic particles in a base material, and the ceramic particles satisfy the requirements (I) and (II). .
(I) The total amount of Al ₂ O ₃ or MgO and SiO ₂ is 80% by weight or more.
(II) The weight ratio of Al ₂ O ₃ or MgO to SiO ₂ [(Al ₂ O ₃ or MgO) / SiO ₂ ] is 0.1 to 15.

[Requirement (I)]
In the requirement (I), Al ₂ O ₃ or MgO and SiO ₂ are included from the viewpoint of securing suitable light diffusibility, light transmittance and low specific gravity, but MgO is preferably included.

In the requirement (I), from the same viewpoint, the content ratio of Al ₂ O ₃ and SiO ₂ or the content ratio of MgO and SiO ₂ is 80% by weight or more, preferably 90% by weight or more, more preferably Is 95% by weight or more, particularly preferably 100% by weight.

In the ceramic particles used in the present invention, examples of what can be contained in a component other than the component composed of Al ₂ O ₃ or MgO and SiO ₂ (hereinafter also referred to as “subcomponent”) include, for example, CaO. , Fe ₂ O ₃ , TiO ₂ , K ₂ O, Na ₂ O, ZrO _{2, and} other metal oxides and carbon.

In order to impart good concealability and bare skin (transparency) to the cosmetic, it is preferable that the whiteness of the ceramic particles is high. From this viewpoint, the total amount of subcomponents is 20% by weight or less in the ceramic particles. Yes, preferably 10% by weight or less, more preferably 5% by weight or less. When Fe ₂ O ₃ and carbon are contained in the subcomponents, particularly from the viewpoint of whiteness, the content of Fe ₂ O ₃ and carbon is preferably 1% by weight or less, more preferably 0.5% by weight or less. Preferably, 0.1 weight% or less is especially preferable.

[Requirement (II)]
In the requirement (II), and preferably the refractive index of the ceramic particles, suitable light diffusing property, from the viewpoint of securing optical transparency and low specific gravity, the weight ratio of _Al 2 _{O 3} and SiO _{2 Al 2 O} 3 / SiO ₂ or, the weight ratio MgO / SiO ₂ of MgO and SiO _2, is 0.1 to 15, preferably from 0.2 to 12, more preferably from 0.3 to 9.

[2] Second Embodiment The second embodiment is a cosmetic comprising ceramic particles in a base material, wherein the ceramic particles satisfy the following requirements (III) and (IV) It is a cosmetic obtained by melting particles in a flame.
(III) The total amount of Al ₂ O ₃ or MgO and SiO ₂ is 80% by weight or more.
(IV) The weight ratio of Al ₂ O ₃ or MgO to SiO ₂ [(Al ₂ O ₃ or MgO) / SiO ₂ ] is 0.1 to 17

[Requirement (III)]
In the requirement (III), Al ₂ O ₃ or MgO and SiO ₂ are included from the viewpoint of securing suitable light diffusibility, light transmittance and low specific gravity, but MgO is preferably included.

In requirement (III), from the same viewpoint, the content ratio of Al ₂ O ₃ and SiO ₂ or the content ratio of MgO and SiO ₂ is 80% by weight or more, preferably 90% by weight or more. Preferably it is 95 weight% or more, Most preferably, it is 100 weight%.

In the ceramic particles used in the present invention, examples of what can be contained in a component other than the component composed of Al ₂ O ₃ or MgO and SiO ₂ (hereinafter also referred to as “subcomponent”) include, for example, CaO. , Fe ₂ O ₃ , TiO ₂ , K ₂ O, Na ₂ O, ZrO _{2, and} other metal oxides and carbon.

In order to impart good concealability and bare skin (transparency) to the cosmetic, it is preferable that the whiteness of the ceramic particles is high. From this viewpoint, the total amount of subcomponents is 20% by weight or less in the ceramic particles. It is preferably 10% by weight or less, and more preferably 5% by weight or less. When Fe ₂ O ₃ and carbon are contained in the subcomponents, particularly from the viewpoint of whiteness, the content of Fe ₂ O ₃ and carbon is preferably 1% by weight or less, more preferably 0.5% by weight or less. Preferably, 0.1 weight% or less is especially preferable.

[Requirement (IV)]
Requirements In (IV), and preferably the refractive index of the ceramic scan particles, from the viewpoint of securing preferred light diffusibility and optical transparency, _Al 2 _{O 3} and the weight ratio of _{SiO 2 Al 2 O 3 / SiO} 2, or, the weight ratio MgO / SiO ₂ of MgO and SiO ₂ are 0.1 to 17, preferably from 0.2 to 15, more preferably 0.3 to 12.

[3] Further preferred embodiment of ceramic particles Further preferred embodiments of the ceramic particles used in the first and second embodiments will be described.

[Light diffusion and transparency]
The light scattering intensity of the ceramic particles is preferably 50% or more, more preferably 70% or more, further preferably 80% or more, and the total transmittance is preferably 70% or more, more preferably 80% or more, and further preferably. Is preferably 90%. Such light scattering intensity can be adjusted by satisfying the requirements (I), (II) or (III), (IV) and the average particle size within the following range.

[Average particle size]
The average particle diameter of the ceramic particles used in the present invention ensures suitable light diffusibility and light transmission, and ensures mechanical strength when manufacturing the light diffusing member by adding the ceramic particles to the substrate. In view of the above, it is preferably 100 μm or less, more preferably 50 μm or less, further preferably 30 μm or less, and further preferably 20 μm or less.

  Further, from the viewpoint of suppressing aggregation and coalescence of the particles and not increasing the particle size distribution of the ceramic particles or from the viewpoint of sphericity, 0.01 μm or more is preferable, 0.1 μm or more is more preferable, and 1 μm or more is more preferable. 5 μm or more is more preferable.

  From the viewpoint of combining the above viewpoints, 0.01 to 100 μm is preferable, 0.01 to 50 μm is more preferable, 0.1 to 50 μm is further preferable, and 1 to 20 μm is further preferable. The average particle diameter is measured by the method described in the examples.

[Sphericality]
The sphericity of the ceramic particles used in the present invention is preferably 0.95 or more, more preferably 0.96 or more, from the viewpoint of improving the feel of the cosmetic material and ensuring suitable concealability and bare skin (transparent) feeling. Preferably, 0.98 or more is more preferable. When the sphericity is within this range, the dispersibility to the base material is good, high addition is possible, and it becomes easy to impart a concealing property and a bare skin (transparent) feeling based on optical properties to the cosmetic. The sphericity is measured by the method described in the examples.

[Water absorption rate]
From the viewpoint of improving the feel of the cosmetic, it is desirable that the surface of the ceramic particles used in the present invention is smooth, that is, there are few pores. As the degree of pores on the surface, the water absorption rate of ceramic particles can be used as an index.

  The pores of the ceramic particles tend to be less when the water absorption is lower. The water absorption is preferably 0.8% by weight or less, more preferably 0.5% by weight or less, and further preferably 0.3% by weight or less. The water absorption can be reduced by increasing the average particle diameter of the ceramic particles, and the water absorption can be further reduced by flame melting treatment. The water absorption is measured by the method described in the examples.

[color]
The color of the ceramic particles used in the present invention is preferably white from the viewpoint of ensuring light transmittance. As for the whiteness, the L * value measured by a spectroscopic colorimeter is preferably 85 or more, more preferably 90 or more, and particularly preferably 95 or more. Such whiteness can be obtained by adjusting the amount and composition of the subcomponents in the ceramic particles as described for the requirement (I). The whiteness is measured by the method described in the examples.

[Crystal structure]
The ceramic particles used in the present invention are a composite compound containing as a main component a component composed of Al ₂ O ₃ or MgO and SiO ₂ , and the structure thereof is an amorphous structure (amorphous). Alternatively, although it can have a crystal structure (crystalline), a crystalline one is preferable from the viewpoint of excellent water resistance, heat resistance, chemical resistance or light resistance and ensuring stable light diffusibility. Such high crystallization can be obtained by adjusting the firing temperature during production of ceramic particles to 1200 to 1850 ° C. and the firing time to 1 to 5 hours.

As the ceramic particles used in the present invention, those having a weight ratio [(Al ₂ O ₃ or MgO) / SiO ₂ ] of 0.3 to 9 between Al ₂ O ₃ or MgO and SiO ₂ are used. When high crystallization was performed, the main peak was obtained from No. of JCPDS (Joint Committee on Powder Diffraction Standards) by X-ray diffraction pattern measurement. It is preferred from the viewpoint of improving light diffusibility and light transmittance, which is attributed to the peak attributed to Mullite of 15-776, the peak attributed to Forsterite of JCPDS No. 34-189 or Clinostatite of JCPDS No. 35-610.

[surface treatment]
The ceramic particles used in the present invention may be surface-treated with a silane coupling agent, silicone, fatty acid soap or the like from the viewpoint of improving dispersibility in the substrate.

[specific gravity]
The ceramic particles used in the present invention have a specific gravity of 3.5 to 4 and lower than that of barium sulfate, and can make the cosmetics exhibit desired properties with a small addition amount.

[Liquidity]
The ceramic particles used in the present invention preferably have appropriate fluidity from the viewpoint of improving the feeling of use of the cosmetic. The fluidity is based on the angle of repose measured by a powder tester, and the angle of repose is preferably 55 degrees or less, more preferably 50 degrees or less, and even more preferably 48 degrees or less. It can be adjusted to a preferable range by reducing the water absorption rate. The angle of repose can be measured by the method described in the examples.

[4] Method for Producing Ceramic Particles The ceramic particles of the present invention may be obtained by mixing Al ₂ O ₃ or MgO using a method such as a mixing method, a precipitation method, a sol-gel method, a spray pyrolysis method, a hydrothermal method, a CVD method, a total amount of SiO ₂ is 80 wt% or more, as _Al 2 _{O 3} or MgO / SiO ₂ weight ratio is 0.1 to 15, the precursor containing the _Al 2 _{O 3} or MgO, and SiO ₂ It can be obtained by firing and grinding the body.

  As a raw material for forming a precursor, it can use individually or in mixture of 2 or more types in each raw material source mentioned below.

Examples of the Al ₂ O ₃ source include aluminum alkoxides such as aluminum oxide, aluminum hydroxide, boehmite, aluminum sulfate, aluminum nitrate, aluminum chloride, alumina sol, and aluminum isopropoxide.

Examples of the SiO ₂ source include silica, silica sand, quartz, cristobalite, amorphous silica, feldspar, pyrophyllite, fumed silica, ethyl silicate, silica gel, and the like.

  Examples of the MgO source include magnesium carbonate, magnesium oxide, magnesium hydroxide and the like.

Examples of (MgO and SiO ₂ ) sources include kaolin, bauxite, mica, sillimanite, andalusite, zeolite, montmorillonite, and hyrosite.

  The method of spheroidizing the ceramic particles of the present invention includes a spray drying method in which spray drying is performed at the time of precursor formation, an emulsification method in which a surfactant is used at the time of precursor formation, a fired body or a precursor directly in flame Examples of the melting method include a flame melting method. From the viewpoint of improving the sphericity and reducing the water absorption rate, it is preferable to spheroidize by the flame melting method.

(1) Composition of raw material powder particles Al ₂ O ₃ or MgO and SiO ₂ are contained at 80% by weight or more, and the Al ₂ O ₃ or MgO / SiO ₂ weight ratio is 0.1 to 17, preferably the average particle size is Powder particles having a size of 100 μm or less are used as a starting material. The starting material is preferably MgO.

The content ratio of Al ₂ O ₃ or MgO and SiO ₂ in the powder particles is preferably 85% by weight or more, more preferably 90% by weight or more, particularly preferably 100% by weight, and Al ₂ O ₃ or MgO / SiO 2 The weight ratio of ₂ is 0.1-17, preferably 0.3-15, more preferably 0.3-12.

From the viewpoint of obtaining spherical particles having a narrow particle size distribution, it is more preferably 1.5 to 10. In order to obtain the desired ceramic particles, the powder particles as the starting material are used by adjusting the weight ratio of Al ₂ O ₃ or MgO / SiO ₂ within the above range in consideration of component evaporation during melting. It is preferable to do.

(2) Average particle diameter and shape of raw material powder particles The upper limit of the average particle diameter of the raw material powder particles is preferably 100 μm or less, more preferably 50 μm or less, further preferably 40 μm or less, further preferably 30 μm or less, and more preferably 20 μm or less. Further preferred.

  Further, from the viewpoint of suppressing the particle size and the sphericity from being in a wide range, the lower limit is preferably 0.01 μm or more, more preferably 0.1 μm or more, further preferably 1 μm or more, and further preferably 5 μm or more.

  Further, from the viewpoint of combining the above viewpoints, 0.01 to 100 μm is preferable, 0.01 to 50 μm is more preferable, 0.1 to 40 μm is further preferable, 1 to 30 μm is further preferable, and 1 to 20 μm is further preferable.

  In addition, it is preferable to select the shape of the raw material powder particles from the viewpoint of promptly spheroidizing in a flame and obtaining ceramic particles having high sphericity and not having a very wide particle size distribution. As a shape, it is preferable that the major axis diameter / minor axis diameter ratio of the raw material powder particles is 9 or less, more preferably 4 or less, from the viewpoint of ensuring residence time in the flame, melting, and quickly spheroidizing. More preferably, it is 2 or less.

(3) Moisture content of raw material powder particles When the powder particles that are the starting material are melted, if the particles contain water, the water will evaporate. In some cases, a large number of openings are formed. Therefore, the water content (% by weight) of the starting material is preferably 10% by weight or less, more preferably 3% by weight or less, more preferably 1% by weight from the viewpoint of adjusting the water absorption and sphericity of the obtained particles to an appropriate range. More preferred are: The water content can be determined from the formula of (weight before heating−weight after heating) / weight before heating × 100 by measuring the weight loss when 1 g of powder particles is heated at 800 ° C. for 1 hour.

(4) Example of raw material powder particles (in the case of Al ₂ O ₃ )
Examples of the raw material for the A1 ₂ O ₃ source include bauxite, bang shale, aluminum oxide, aluminum hydroxide, boehmite, aluminum sulfate, aluminum nitrate, aluminum chloride, alumina sol, aluminum alkoxide such as aluminum isopropoxide, and the like. .

Examples of the raw material for the SiO ₂ source include silica, silica sand, quartz, cristobalite, amorphous silica, feldspar, pyrophyllite, fumed silica, ethyl silicate, silica gel, and the like.

Examples of the raw material of the (A1 ₂ O ₃ + SiO ₂ ) source include kaolin, van earth shale, bauxite, mica, sillimanite, andalusite, mullite, zeolite, montmorillonite, and hyrosite.

  These raw materials can be used alone or in admixture of two or more. The selected starting material is preferably used after calcining in order to reduce its moisture content or to facilitate its melting. Examples of the calcined raw material powder particles include calcined van pages, calcined mullite, calcined bauxite, a mixture of calcined aluminum hydroxide and kaolin, and the like.

(In the case of MgO)
Examples of the raw material for the MgO source include magnesium carbonate, magnesium oxide, magnesium hydroxide, olivine, pyroxene dunstone, serpentine, and olivine minerals.

Examples of the raw material for the (MgO + SiO ₂ ) source include forsterite, clinoenstatite, enstatite, olivine, pyroxene, dunstone, serpentinite, basalt, olivine mineral, and talc.

  These raw materials can be used alone or in admixture of two or more. The selected starting material is preferably used after calcining in order to reduce its moisture content or to facilitate its melting. Examples of the calcined raw material powder particles include calcined serpentine, calcined olivine, calcined pyroxene, calcined dunstone forsterite, calcined enstatite, and the like.

(5) Spheronization by flame melting method In the spheronization process of raw material powder particles, a flame melting method is applied in which the raw material powder particles are dispersed in a carrier gas such as oxygen and melted by being put into a flame, and then spheroidized. It is preferable to do.

The flame is generated by burning fuel such as propane, butane, methane, natural liquefied gas, LPG, heavy oil, kerosene, light oil, and pulverized coal with oxygen. Further, a plasma jet flame generated by ionizing N ₂ inert gas or the like may be used.

  The volume ratio of the fuel to oxygen is preferably 1.01 to 1.3 from the viewpoint of complete combustion. From the viewpoint of generating a high-temperature flame, it is preferable to use an oxygen / gas burner. Although the structure of the burner is not particularly limited, the burners disclosed in JP-A-7-48118, JP-A-11-132421, JP-A-2000-205523, or JP-A-2000-346318 are disclosed. preferable.

  The flame temperature is preferably equal to or higher than the melting point of the raw material powder particles from the viewpoint of melting and spheronizing the raw material powder particles. Specifically, 1700 ° C. or higher is preferable, 2000 ° C. or higher is more preferable, and 2600 ° C. or higher is further preferable.

The powder particles are preferably introduced into the flame by being dispersed in a carrier gas. As the carrier gas, oxygen is preferably used. In this case, the carrier gas oxygen has an advantage that it can be consumed for fuel combustion. The concentration of the powder in the gas is preferably 0.1 to 20 kg / Nm ^{3 and} more preferably 0.2 to 10 kg / Nm ³ from the viewpoint of ensuring sufficient dispersibility of the powder particles. Furthermore, when thrown into the flame, it is more preferable to pass through a mesh, a static mixer or the like to improve dispersibility.

[5] Cosmetics The cosmetics of the present invention preferably contain the ceramic particles according to the present invention in a base material containing oil such as liquid oil, water, wax such as solid fat or semi-solid fat as a constituent component. In the range that does not impair the effects of the present invention, if necessary, components that are blended in ordinary cosmetics, for example, various surfactants, powders other than the ceramic particles according to the present invention, water-soluble polymers, Oil-soluble polymers, polymer latexes, antioxidants, preservatives, drugs, pigments, fragrances, humectants, ultraviolet absorbers, thickeners, pH adjusters, water, and the like can be blended.

(1) Compounding component of base material In the base material used in the present invention, as the liquid oil, for example,
Liquid hydrocarbon oils such as liquid paraffin, squalane and squalene;
Vegetable oils such as cottonseed oil, sesame oil, linseed oil, sunflower oil, soybean oil, safflower oil, castor oil, avocado oil, camellia oil, macadamia nut oil, olive oil, jojoba oil, coconut oil;
Higher fatty acids such as lauric acid, oleic acid, isostearic acid;
Higher alcohols such as cetanol, hexadecyl alcohol, oleyl alcohol; cetyl 2-ethylhexanoate, di-2-ethylhexyl, 2-octyldodecyl myristate, neopentyl glycol di-2-ethylhexanoate, tri-2-ethyl Esters such as glycerol hexanoate, oleic acid-2-octyldodecyl, isopropyl myristate, glycerol triisostearate, 2-ethylhexanoic acid diglyceride, di-paramethoxycinnamic acid-mono-2-ethylhexanoic acid glyceryl;
Silicone oils such as dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane;
Widely used in cosmetics such as fluoro oils such as perfluorodecalin, perfluoroadamantane, perfluorobutyltetrahydrofuran, perfluorooctane, perfluorononane, perfluoropentane, perfluorodecane, perfluorododecane and perfluoropolyether. Liquid oil is used.

  From the viewpoint of the feeling of use of the cosmetic, liquid paraffin, squalane, castor oil, olive oil and cetanol are preferred.

  In the base material used in the present invention, as the solid fat or semi-solid fat, for example, petrolatum, lanolin, paraffin wax, beeswax, carnauba wax, ceresin, microcrystalline wax, candelilla wax, acrylic ester copolymer having fluoroalkyl A solid fat or semi-solid fat generally used in cosmetics such as these is used. Vaseline, beeswax and carnauba wax are preferred from the viewpoint of the feeling of use of the cosmetic.

  When a surfactant is added to the substrate used in the present invention, for example, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin Nonionic surfactants such as fatty acid esters, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitol fatty acid esters; anionic surfactants typified by fatty acid soaps such as sodium stearate and triethanolamine palmitate; and cations Surfactants generally used in cosmetics such as ionic surfactants and amphoteric surfactants are used.

  When a water-soluble polymer is added to the substrate used in the present invention, for example, carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, tragacanth gum, carrageenan, locust bean gum, dextrin, dextrin fatty acid ester, carboxyvinyl polymer Water-soluble polymers widely used in cosmetics such as xanthan gum, gelatin, sodium alginate, gum arabic and the like are used.

  When adding a humectant to the substrate used in the present invention, for example, sorbitol, xylitol, glycerin, maltitol, propylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, sodium pyrrolidonecarboxylate, lactic acid, Moisturizers commonly used in cosmetics such as sodium lactate and polyethylene glycol are used.

  When a preservative is added to the base material used in the present invention, for example, a preservative widely used in cosmetics such as paraoxybenzoic acid alkyl ester, sodium benzoate, potassium sorbate and the like is used.

  As said chemical | medical agent mix | blended as needed, the chemical | medical agent generally used for cosmetics, such as vitamins, a crude drug, an anti-inflammatory agent, and a disinfectant, is used, for example. Examples of the UV absorber blended as necessary include cosmetics such as paraaminobenzoic UV absorbers, anthranyl UV absorbers, salicylic acid UV absorbers, cinnamic acid UV absorbers, and benzophenone UV absorbers. A commonly used ultraviolet absorber is used.

When adding a powder other than the ceramics particles according to the present invention to the substrate used in the present invention, for example,
Talc, mica, sericite, bentonite, vermiculite, hectorite, hydrite, aluminum hydroxide, muscovite, synthetic mica, phlogopite, red mica, biotite, lithia mica, magnesium carbonate, calcium carbonate, diatomaceous earth, calcium silicate, Inorganic powders such as barium silicate, strontium silicate, hydrous silicic acid, anhydrous silicic acid, metal tungstate, hydroxyapatite, barium sulfate, boron nitride, barium sulfate treated mica;
Organic powders such as nylon powder, polymethyl methacrylate powder, polyethylene powder, polystyrene powder, benzoguanamine powder, silicone resin powder, fluororesin powder, microcrystalline cellulose powder, silk powder, rice starch, Nε-lauroyl-L-lysine;
Fatty acid polyvalent metal salts (for example, calcium stearate, zinc stearate, magnesium stearate, magnesium myristate, etc.) Alkyl phosphate polyvalent metal salts (for example, monoalkyl zinc phosphate, calcium cetyl phosphate, zinc sodium cetyl phosphate), amides Surfactant polyvalent metal salt powder of sulfonic acid polyvalent metal salt, acylated amino acid polyvalent metal salt (N-ralloyl-β-alanine calcium salt, etc.);
Inorganic white pigments such as titanium oxide, zinc oxide and zirconium oxide; Inorganic red pigments such as iron oxide (Bengara), iron titanate and calamine; Inorganic yellow pigments such as iron hydroxide, γ-iron oxide and ocher;
Inorganic black pigments such as black iron oxide, carbon black, low-order titanium oxide;
Inorganic blue pigments such as mango violet, cobalt violet, ultramarine blue and bitumen;
Inorganic green pigments such as chromium oxide, chromium hydroxide and cobalt titanium; Pearl pigments such as titanium oxide coated mica, titanium oxide coated bismuth oxychloride, bismuth oxychloride, titanium oxide coated talc, fish scale foil, colored titanium oxide coated mica;
Metal powders such as aluminum powder, stainless steel powder, and copper powder; powders commonly used in cosmetics such as UV protective powders such as fine particle titanium oxide, fine particle zinc oxide, flaky zinc oxide, fine particle zirconium oxide, and fine particle cerium oxide be able to.

  The weight ratio (A) / (B) of the powder (A) other than the ceramic particles and the liquid oil (B) is preferably 0.1 to 50 / 0.1 to 50, preferably 0.1 to 40 / 0.5. -40 are more preferable, and 0.1-30 / 1-30 are still more preferable. It is preferable for the weight ratio (A) / (B) to be within the above-mentioned range since the feeling of use and feel of the cosmetics are improved.

When adding a pigment to the substrate used in the present invention, for example,
Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 203, Red No. 204, Red No. 205, Red No. 213, Red No. 219, Red No. 220, Red No. 226, Red No. 227 No., Red 228, Red 230, Red 401, Red 405, Red 505, Yellow 4, Yellow 5, Yellow 202, Yellow 203, Yellow 204, Yellow 205, Yellow 401, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 205, Orange 206 No., orange color 207 tar pigments;
β-carotene, anato, crocin, capsanthin, shisonin, hibiscus pigment, grape skin extract, safrole yellow, cacao pigment, riboflavin, riboflavin butyrate, carminic acid, lacainate, chlorophyll, curcumin, betanin, red yeast rice pigment, bradylin, Various powders and pigments widely used in cosmetics such as natural pigments such as caramel are used.

  The various powders and pigments can be used as they are, but inorganic treatment agents such as silica treatment, alumina treatment, silica alumina treatment, titania treatment, barium sulfate treatment, or silicone treatment, higher fatty acids and their Metal soap treatment, higher alcohol treatment, ester treatment, wax treatment, acylglutamic acid, amino acid treatment such as N-mono long chain acyl basic amino acid, hydrogenated lecithin and lecithin treatment, acylated collagen treatment, polyethylene treatment, polyacrylic acid treatment Various types of surface treatments by one or a combination of two or more organic treatment agents such as treatment with alkyl phosphate ester, treatment with metal salt of alkyl phosphate, treatment with treatment agent containing perfluoroalkyl group in the molecule Powders and pigments can also be used.

  From the viewpoint of ensuring good concealability and a bare skin (transparent) feeling of the cosmetic, the content of the ceramic particles in the cosmetic is particularly preferably 0 in the cosmetic from the viewpoint of ensuring good light diffusibility. .1% by weight or more, more preferably 1% by weight, still more preferably 4% by weight or more, particularly from the viewpoint of ensuring light transmission, preferably 95% by weight or less, more preferably 80% by weight or less, and still more preferably Is 60% by weight or less, more preferably 45% by weight or less.

  From the viewpoint of combining the above viewpoints, 0.1 to 95% by weight is preferable, 1 to 80% by weight is more preferable, 1 to 60% by weight is further preferable, 4 to 45% by weight is further preferable, and 1 to 10% by weight is preferable. Is more preferable.

  In particular, the powder foundation is preferably 30 to 70% by weight, more preferably 40 to 60% by weight, from the viewpoint of ensuring good concealability of the cosmetic and a bare skin (transparent) feeling.

From the viewpoint of ensuring a good usability of the cosmetic, the components contained in the cosmetic base are preferably in the following blending weight ratio (% by weight).

(2) Manufacturing conditions In the cosmetic of the present invention, for example, the powder is mixed by a mixer such as a ball mill, a V-type blender, a ribbon mixer, a Henschel mixer, a high speed mixer, a nauter mixer, and the liquid component is mixed there. After adding and kneading, it is molded with a press. Of these, the method of mixing with a Henschel mixer is preferred.

(3) Applications The cosmetics of the present invention are liquid foundations, creamy foundations, oily foundations, powder foundations, powdery, solid tedious, blushers, eye shadows, lipsticks, eyeliner and other makeup cosmetics, emulsions, creams, etc. Can be used as basic cosmetics, body powders such as body powders, baby powders, medicinal cosmetics such as sunscreens, and external medicines such as anti-inflammatory agents and skin protection agents. It can be made into a wide variety of forms such as emulsion, oil, and gel.

〔Measuring method〕
(1) Sphericality The sphericity is obtained by determining the area of the particle projection cross section of the SEM image obtained by measuring with ceramics particles with a real surface view microscope VF-7800 (manufactured by Keyence Corporation) and the perimeter of the cross section. Next, [circumferential length of a perfect circle having the same area as that of the particle projected cross section] / [peripheral length of the particle projected cross section] is calculated, and the obtained values are averaged for any 50 particles. .

(2) Composition Elemental analysis is performed by a fluorescent X-ray method (JIS R2216 “Fluorescent X-ray analysis method of refractory brick and refractory mortar”) to quantify the composition of each atom of Al, Mg, and Si. X-ray diffraction measurement is performed, and the presence of Al ₂ O ₃ , MgO, SiO ₂ or a composite compound thereof is confirmed from the diffraction pattern. If a diffraction pattern cannot be obtained, the presence of Al ₂ O ₃ , MgO, and SiO ₂ is confirmed by measurements such as Raman spectroscopy, IR, and NMR. From the above, it calculates the _Al 2 _{O 3} or MgO, the total amount of SiO _2, and the _Al 2 _{O 3} or MgO, the weight ratio of SiO ₂ to _[(Al 2 _{O 3} or MgO) / SiO _2].

(3) Average particle diameter The average particle diameter means D50 (medium particle diameter of 50% by volume) and is measured by a laser diffraction / scattering method by Horiba LA-920.
(4) Refractive index The refractive index of ceramic particle | grains and base-material resin is based on B method (Immersion method using a microscope (Becke line method)) among JISK7142 "The refractive index measuring method of a plastics". However, instead of the immersion liquid used in JIS K7142, the liquid of Table 2 is used as the immersion liquid, and the temperature of the immersion liquid is measured at 15 to 20 ° C. As a microscope, a polarizing microscope “Optiphoto” (manufactured by Nikon) is used.

(5) Water absorption rate The water absorption rate is measured according to the method of measuring the water absorption rate of JIS A1109 fine aggregate.

(6) Angle of repose The angle of repose is measured according to JIS R9301-2-2. As a powder tester used for measuring the angle of repose, TYPE PT-E manufactured by Hosokawa Micron Corporation is used.

(7) Total transmittance and light diffusivity Ceramic particles are treated with Hoover Mahler (Yasuda Seiki Seisakusho) so that its concentration is 20% by weight in silicone oil (amino-modified silicone: SF 8417 made by Toray Silicone, refractive index 1.41). And mixed uniformly.

  Thereafter, a thin film having a thickness of 15 μm was formed on a glass plate using an applicator, and a parallel light transmittance (Tp) and a scattered light transmittance were measured with a haze meter (manufactured by Murakami Color Research Laboratory (type: HR-100)). (Td) was measured, the total transmittance was calculated from Tp + Td, and [Td / (Tp + Td)] × 100 was calculated to determine the light scattering intensity.

(8) Evaluation method of cosmetic properties The average score of evaluation of 16 panelists was determined by 16 in-house professional panelists based on the following criteria for the following items 1 to 4.
Item 1: Feeling of use Item 2: Feeling of the skin (transparency)
Item 3: Cosmetic feel Item 4: Concealment of makeup (difficulty in seeing spots and freckles)
(Evaluation criteria)
4 points: Excellent.
3 points: Excellent.
2 points: Normal.
1 point: Inferior.
0 point: Very inferior.

[Production Example 1]
(1) Manufacturing conditions for ceramic particles 1 Alumina (purity 99.9%) and silica (purity 99.9%) are wet-mixed in ethanol so that the Al ₂ O ₃ / SiO ₂ weight ratio is 2.6. The vacuum-dried powder was fired at 1500 ° C. for 3 hours, and dry pulverized to obtain ceramic particles 1.
(2) Regarding the ceramic particles 1, the properties shown in Table 3 were obtained.

[Production Example 2]
(1) Raw material powder particles Ceramic particles 1 were used as raw material powder particles.
(2) Spheroidization conditions The powder particles were put into a flame (2000 ° C.) in which oxygen was used as a carrier gas and LPG (propane gas) was burned at an oxygen ratio (volume ratio) of 1.1, and ceramic particles. 2 was obtained.
(3) Regarding the ceramic particles 2, the properties shown in Table 3 were obtained.

[Production Example 3]
(1) Manufacturing conditions for ceramic particles 3 An aluminum sulfate aqueous solution (0.7 mol / L) and fumed silica were mixed so that the Al ₂ O ₃ / SiO ₂ weight ratio was 2.6. This was dried at 120 ° C., fired at 1400 ° C. for 3 hours, and wet pulverized to obtain ceramic particles 3.
(2) Regarding the ceramic particles 3, the properties shown in Table 3 were obtained.

[Production Example 4]
(1) Raw material powder particles Ceramic particles 1 were used as raw material powder particles.
(2) Spheroidization conditions Ceramic particles 4 were obtained in the same manner as in Production Example 2.
(3) For the ceramic particles 4, the properties shown in Table 3 were obtained.

[Production Example 5]
(1) Manufacturing conditions for ceramic particles 5 24 ml of a surfactant (Kao Emulgen 108) was added to a solution obtained by stirring and mixing 2400 ml of n-butanol and 2600 ml of carbon tetrachloride. To this solution, 200 ml of a solution in which 10% by weight of alumina sol and colloidal silica were mixed at an Al ₂ O ₃ / SiO ₂ weight ratio of 2.6 was added dropwise to obtain a spherical gel. This was filtered, dried at 60 ° C. to obtain a powder, and fired at 1200 ° C. for 1 hour.
(2) For the ceramic particles 5, the properties shown in Table 3 were obtained.

[Production Example 6]
(1) Manufacturing conditions for ceramic particles 6 Alumina sol and colloidal silica were mixed so that the weight ratio of Al ₂ O ₃ / SiO ₂ was 2.6, and ultrasonic spray drying was performed at 300 ° C. The obtained powder was baked at 1000 ° C. for 3 hours.
(2) Regarding the ceramic particles 6, the properties shown in Table 3 were obtained.

[Production Example 7]
(1) Manufacturing conditions for ceramic particles 7 Ethyl silicate [Si (OC ₂ H ₅ ) ₄ ] is 4 mol / L in a mixed solution of ethanol / water / hydrochloric acid (molar ratio 5: 1: 0.01). Mix and stir at room temperature for 24 hours. Thereto was added magnesia (purity 99.9%) so that the MgO / SiO ₂ weight ratio was 1.3, and the mixture was stirred at room temperature for 24 hours. The obtained gel was vacuum dried at 80 ° C., fired at 1200 ° C. for 3 hours, and dry-pulverized to obtain ceramic particles 7.
(2) For the ceramic particles 7, the properties shown in Table 3 were obtained.

[Production Example 8]
(1) Raw material powder particles and spheroidizing conditions Ceramic particles 8 were obtained in the same manner as in Production Example 2 using ceramic particles 7 as raw material powder particles.
(2) For the ceramic particles 8, the properties shown in Table 3 were obtained.

[Production Example 9]
(1) Raw material powder particles and spheroidizing conditions Ceramic particles 7 were wet pulverized to obtain ceramic particles 9.
(2) Regarding the ceramic particles 9, the properties shown in Table 3 were obtained.

[Production Example 10]
(1) Raw material powder particles and spheroidizing conditions Ceramic particles 10 were used as raw material powder particles, and ceramic particles 10 were obtained in the same manner as in Production Example 2.
(2) About the ceramic particle | grains 10, the property of Table 3 was obtained.

[Example 1]
The following ingredients were blended to produce a powder foundation as a cosmetic. The weight ratio (A) / (B) of the powder (A) to the liquid oil (B) was 39.8 / 8.
(1) Mica 6.4
(2) Ceramic particles 1 50
(3) Talc 20
(4) Titanium oxide 10
(5) Bengala 0.8
(6) Yellow iron oxide 2.5
(7) Black iron oxide 0.1
(8) Liquid paraffin 8
(9) Beeswax 2
(10) Preservative 0.1
(11) Fragrance 0.1
Total 100
[Composition conditions]
Components (1) to (7) are mixed and pulverized using a Henschel mixer, and components (8) to (10) are mixed uniformly, then component (11) is added, mixed and pulverized, and passed through a sieve. This was compression molded with a metal pan to obtain a powder foundation.

[Examples 2 to 10]
In Example 1, the ceramic particles 1 were replaced with ceramic particles 2 to 9, and a powder foundation was produced under the same conditions as in Example 1.

[Comparative Example 1]
A powder foundation was produced under the same conditions as in Example 1 by replacing the ceramic particles 1 with commercially available barium sulfate powder.

表３から明らかな通り、本発明の化粧料は、比較例１（硫酸バリウム）と比べると、使用感、素肌感、感触、隠蔽性が優れており、特に火炎溶融法を適用して球状化処理したセラミックス粒子を用いた場合には各効果がより優れていた。

As is apparent from Table 3, the cosmetic of the present invention is superior in use feeling, bare skin feeling, feel and concealment compared to Comparative Example 1 (barium sulfate), and is particularly spheroidized by applying the flame melting method. When the treated ceramic particles were used, each effect was more excellent.

Claims (7)

A cosmetic comprising ceramic particles in a base material, wherein the ceramic particles satisfy the requirements (I) and (II).
(I) The total amount of Al ₂ O ₃ or MgO and SiO ₂ is 80% by weight or more.
(II) The weight ratio of Al ₂ O ₃ or MgO to SiO ₂ [(Al ₂ O ₃ or MgO) / SiO ₂ ] is 0.1 to 15.   The cosmetic according to claim 1, wherein the ceramic particles are produced by a flame melting method. A cosmetic comprising ceramic particles in a base material, wherein the ceramic particles are obtained by melting powder particles satisfying the following requirements (III) and (IV) in a flame.
(III) The total amount of Al ₂ O ₃ or MgO and SiO ₂ is 80% by weight or more.
(IV) The weight ratio of Al ₂ O ₃ or MgO to SiO ₂ [(Al ₂ O ₃ or MgO) / SiO ₂ ] is 0.1 to 17.   The cosmetic according to any one of claims 1 to 3, wherein the ceramic particles have an average particle size of 0.01 to 100 µm.   The cosmetic according to any one of claims 1 to 4, wherein the ceramic particles have a water absorption rate of 0.8% by weight or less and a sphericity of 0.95 or more.   The cosmetic according to any one of claims 1 to 5, wherein the content of the ceramic particles is 0.1 to 95% by weight in the cosmetic.   The base material further contains a powder (A) other than the ceramic particles according to any one of claims 1 to 6 and a liquid oil (B), and a weight ratio (A) / (B) of (A) and (B). ) Is 0.1-50 / 0.1-50.