JP2011132155A - Composite powder, and cosmetic blended with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powdery material capable of finishing the skin brightly while holding a bare skin feeling over the whole of the skin, also having an effect of correcting the flabbiness of the skin and finishing as a younger face by blending it with the cosmetic. <P>SOLUTION: A composite powdery material is provided by including a base powdery material and the super fine particles of zinc oxide having an approximately hexagonal form and attached on the surface of the base powdery material, and at least a part of the zinc oxide particles constitutes the form of the following (A), (B) and (C), or the form of mixed presence of ≥2 of them. (A) The form of coalescent particles is made by the gathering of at least the part of the zinc oxide particles of the super fine particle form, having approximately hexagonal form and attaching on the surface of the base powdery material; (B) the form of the hexagonal plates is made by the growth of the coalescent particles; and (C) the form of a chain like particles is made by the chain-formation or linking of the coalescent particles or hexagonal plates. Also, by using the composite powdery material, the cosmetic capable of obtaining an excellent bare kin feeling, finishing the face (skin) brightly and correcting the flabbiness of the skin is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a composite powder, more specifically, a novel composite powder in which ultrafine zinc oxide particles are fixed on the surface of a base powder (for example, flaky powder) so as to form a specific shape or form ( The present invention relates to ultrafine zinc oxide-base powder composite powder), and cosmetics containing the same, particularly makeup cosmetics.

  Conventionally, the blur effect by diffuse reflection of spherical powder has been used as a method of correcting physical unevenness of skin such as pores and fine lines on the bare skin.

  Particularly recently, for such purposes, as a spherical powder, refraction of barium sulfate (refractive index 1.63), alumina (refractive index 1.74) or the like from conventional resin powder such as PMMA (refractive index 1.49) or nylon. Non-spherical inorganic powder having a rate of 1.49 to 1.74 is used.

  For example, spherical barium sulfate having an average particle diameter of 0.1 to 4 μm has been developed. In cosmetics using these, color unevenness such as spots and freckles is observed while making uneven skin irregularities such as pores and wrinkles less noticeable. It has been reported that it is difficult to see and gives a good sense of transparency and skin (for example, see Patent Document 1).

  Refraction of light by providing a composite powder in which fine spherical resin powder is uniformly combined on the surface of flaky powder such as talc, mica, alumina, barium sulfate, etc., and a titanium oxide layer or silica layer on the surface of spherical silica particles. Development of composite powders that improve the diffusibility of light by increasing the rate and enhance the blur effect is also underway.

  For example, a composite powder in which the surface of a flaky powder such as mica or talc is coated with barium sulfate having an average particle diameter of 0.5 to 2.0 μm has been proposed (see, for example, Patent Documents 2 and 3).

  In addition, a composite powder has been developed in which flaky surfaces such as mica and talc are coated with ultrafine particles with an average particle size of 0.1 μm or less. This powder has excellent adhesion and extensibility to the skin, and also has a light scattering effect. It has been reported that it is excellent (see, for example, Patent Document 4).

  On the other hand, by using a high refractive index titanium oxide pigment (titanium oxide (R) n = 2.71, titanium oxide (A) n = 2.52), skin color defects, skin pores, fine lines, etc. There is a method of concealing the unevenness.

  Moreover, as a method of correcting the color defects exemplified by dull skin, freckles, redness, dark circles around the eyes, etc., the refractive index is mainly from 2.52 (anatase type) to 2.71 (rutile type). Titanium oxide pigments with strong hiding power and coloring power have been used.

  Furthermore, it is also known that correction based on powder spectral characteristics is effective as a method for correcting such color defects.

  Powders aiming at a finish that is naturally adapted to the skin have been developed by doping titanium oxide with iron oxide and coloring it to yellow-orange (see, for example, Patent Document 5).

JP-A-8-283124 Japanese Examined Patent Publication No. 2-42387 Japanese Examined Patent Publication No. 2-42388 Japanese Patent No. 3184608 Japanese Patent Laid-Open No. 7-3181

  However, the spherical powder used for obtaining the blur effect due to diffuse reflection is relatively difficult to uniformly disperse in the cosmetic, and the presence of the spherical powder in an aggregated state deteriorates the diffuse reflection characteristics or reduces the spherical shape. The powder may fall into the skin crevice (skin part) and make the skin irregularities such as pores and fine wrinkles stand out, which is hardly satisfied from the viewpoint of uniform finish of the makeup skin. Furthermore, if the amount of spherical powder is increased, it will be difficult to obtain a moist feeling on the decorative film when applied, it will tend to be a makeup film with a smoother feeling, will not be able to cope with the skin quality, and at the same time, the moldability in compression solidification will decrease. Such a defect has become apparent.

  In addition, in the composite powder obtained by uniformly coating the surface of the flaky powder with a fine resin powder, the surface formed by the dense adhesion state of the fine resin powder of 0.5 μm or less becomes a surface regular reflection and strong. Give gloss. In addition, since the refractive index of the resin powder is 1.5 or less, it is familiar with the oil in the cosmetics (refractive index: 1.3 to 1.4) and easily transparentized, and the expected diffuse reflection characteristics are obtained. On the contrary, the unevenness of the skin is conspicuous, and it is hardly satisfied from the viewpoint of the uniform finish of the cosmetic. Even with the composite powders described in Patent Documents 2 and 3, etc., the wrinkle hiding effect due to the light scattering effect was insufficient.

  As described above, as an example of compounding inorganic powder having a refractive index of 1.5 or more in Patent Document 4 and the like, ultrafine sulfuric acid having an average particle diameter of 0.1 μm on the surface of a flaky powder such as mica or talc It has been reported that the composite powder coated with barium is excellent in light scattering effect. However, with such a composite powder, the effect of correcting the unevenness of the skin and achieving a uniform finish can be obtained while minimizing the effects of oil in the cosmetics and sebum on the skin. The involved texture is not obtained, and it is difficult to obtain a foundation with a feeling of bare skin, which is not satisfactory.

  On the other hand, in the method using a high refractive index titanium oxide pigment (titanium oxide (R) n = 2.71, titanium oxide (A) n = 2.52), the skin color defects, skin pores, fine lines, etc. It is possible to hide the unevenness of the surface and make it appear as a uniform finish, but the texture is a matte matte state, and the foundation finish is pale due to strong light scattering due to high refractive index, never natural It did not give a nice finish. In addition, no translucency was felt, giving only a foreign impression that was far from the actual skin.

  The invention of the above-mentioned Patent Document 5 was made to solve this problem, but although this invention makes a certain contribution to the effect of making the finish look natural, it can be said that the problem has been sufficiently solved. There wasn't.

  Furthermore, in order to obtain a finish that is close to the actual bare skin, powders that focus on the structure of the skin tissue have been developed. However, there is a limit to imitating complex skin tissue, and a natural finish can be obtained. Not only is it not concealed, but it does not cover the color defects such as dullness and color unevenness because of its low concealment property, so that a sufficient effect cannot be expected at present.

  Therefore, in order to express more youth, especially in makeup cosmetics, the skin tone of the skin color is excellent and the finish is bright, and the sagging of the face is highly difficult to deal with by methods other than the conventional treatment of fine lines and pores. Development of a material (composite material) excellent in optical correction is desired.

  In order to correct skin irregularities and color defects, correction by powder diffuse reflection characteristics and spectral characteristics is the most effective correction method for the natural finish. Various corrections are necessary in cosmetics.

  The object of the present invention is to blend into cosmetics to have an effect of brightening the skin while maintaining a feeling of bare skin on the entire skin and correcting the sagging of the skin, and can make a more youthful face. It is to provide a composite powder and a cosmetic containing the composite powder.

  As a result of intensive studies aimed at solving the above problems, the present inventors have found that ultra-fine zinc oxide (particles, multiple particles, coalesced particles, chained particles, etc.) having a specific shape or form has a retroreflected light. There is a scattering effect due to each single light of regular reflection light, diffuse reflection light and phase difference scattered light, and complex interaction (interference action etc.) of those reflected light. However, it has been found that there is an effect of brightening the skin while maintaining the feeling of the whole skin. The ultrafine zinc oxide particles are primary particles having a substantially hexagonal cross section, and preferably have an average particle size of about 0.03 to 0.05 μm. Further, at least a part of the ultrafine zinc oxide can be united or assembled in the course of crystal growth on the surface of the base powder to form coalesced particles. The average size of the primary particles is preferably about 0.08 to 0.4 μm, more preferably about 0.08 to 0.3 μm. The average size of the primary particles is about More preferably, the thickness is about 0.1 μm and the distribution width is about 0.08 to 0.15 μm. In addition, the coalesced particles are grown at least partially (laminated or assembled) to form a hexagonal plate, and then linked or connected, or without forming the hexagonal plate. Chain-like particles can be formed by chaining or linking, or by chaining or linking at least a part of the coalesced particles and the hexagonal plate. For the hexagonal plate, the average length of the primary particles is preferably about 0.1 to 0.3 μm, and for the chain particles, the average length of the primary particles is preferably 0. About 1 to 1.0 μm, more preferably about 0.13 to 0.8 μm. Further, with regard to the chain-like particles, it is more preferable that the average length of the primary particles is about 0.3 μm and the distribution width is about 0.13 to 0.65 μm. The crystal growth of zinc oxide in the ultrafine particles, that is, the form that the zinc oxide in the ultrafine particles can take, is the amount of reaction water of the liquid in which the base powder is uniformly dispersed, the reaction time, the pH adjustment during the reaction, the alkali It can be controlled by controlling the dropping speed of the solution. The coalesced particles and the chain-like particles have fine irregularities and a hexagonal smooth surface on the surface thereof, and light is complicatedly reflected on the surface.

  A composite powder obtained by bonding (adhering) such ultrafine zinc oxide (particles, multiple particles, coalesced particles, chained particles, etc.) to the surface of the base powder (flaky powder) Reflects light from the front of the skin to give it a color close to the skin (giving a tone close to natural skin color), reflects light from the front of the face (skin) to give a color close to the skin, and sagging In the shadow part, the small piece has the effect of reflecting light at various angles like a reflex plate used in photography, and the effect of optically correcting the sagging of the skin (effect that makes you look more youthful) According to the cosmetic compounded with such a composite powder, an excellent feeling of bare skin is obtained, the face (skin) is finished brightly, and the sagging of the skin can be corrected. The present invention has been completed based on these findings.

That is, in the present invention,
A base powder and ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface, and at least a part of the zinc oxide particles is in the form of the following (A), (B) or (C) Composite powder characterized by constituting a form in which two or more of these forms are mixed (hereinafter also referred to as “composite powder of the present invention”):
(A) Form of coalesced particles formed by assembling at least a part of ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface of the base powder;
(B) the form of a hexagonal plate formed by further growth of the coalesced particles;
(C) It is possible to provide a form of chain-like particles formed by chaining or linking the coalesced particles and / or the hexagonal plates.

  In the present invention, the base powder is preferably a flaky powder.

  In the present invention, the flaky powder is preferably one or more selected from the group consisting of plate-like powder, mica titanium, and colored pigment-coated pearl pigment, One or more selected from the group consisting of talc, sericite, mica, kaolin, synthetic mica, synthetic talc, fish scale foil, bismuth oxychloride, silver luster pearl pigment, iris foil pearl pigment and colored pigment coated pearl pigment It is preferable that

  Moreover, in this invention, the particle diameter of the zinc oxide particle of the ultrafine particle which has the said substantially hexagonal shape can be represented by an average particle diameter, and can be 30-50 nm.

  In another aspect of the present invention, there is provided a cosmetic (characterized as “the cosmetic of the present invention”), preferably a makeup cosmetic, characterized in that the composite powder described above is blended. Can do.

  In the present invention, the composition ratio (mass ratio) of the zinc oxide particles and the base powder is preferably 90/10 to 10/90.

  According to the present invention, light from the front of the face (skin) is specularly reflected to show a color close to the skin (giving a tone close to a natural skin color), and a small piece of the composite powder is photographed in a shadow portion due to sagging It is possible to provide a composite powder having an effect of reflecting light at various angles and an effect of optically correcting the sagging of the skin (an effect that makes it look more youthful) like the reflex plate used in the above.

  Furthermore, using the composite powder, it is possible to easily and simply produce a cosmetic that has a bright face (skin), is excellent in skin feel when applied, and also corrects skin sagging. Therefore, the present invention is extremely useful industrially, particularly in the cosmetic field.

2 schematically shows the process of crystal growth on the surface of a base powder of zinc oxide particles constituting the composite powder of the present invention. The reflection characteristics of the composite powder of the present invention are schematically illustrated. 2 is a SEM photograph (× 6,000) of the composite powder of the present invention. 2 is a SEM photograph (× 100,000) of the composite powder of the present invention. On the surface of the composite powder, the zinc oxide particles constituting the composite powder form a coalesced particle. 2 is a SEM photograph (× 100,000) of the composite powder of the present invention. On the surface of the composite powder, the zinc oxide particles constituting the composite powder form a chain-like particle form.

  In the following, a composite powder comprising a base powder and ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface, wherein the zinc oxide particles constitute a specific shape or form, Although the form for implementing this invention is demonstrated in detail centering on the composite powder of this invention, and the cosmetics which mix | blended this, it is not limited to these.

  In the present invention, the “ultrafine particle” means an average particle diameter of about 30 to 50 nm. In addition, the average particle size can be easily measured by a scanning electron microscopy (SEM) which is a known method. However, when specified in the present invention, the particle size at the nm level is , By SEM.

  In the present invention, the “unified particles” are formed by unifying or assembling at least a part of ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface of the base powder. Particles in the form of clusters or aggregates.

  Further, in the present invention, the “chain particle” means that the hexagonal plate formed by the growth of the coalesced particles is further linked or connected, or without forming the hexagonal plate. This refers to a particle in the form of a chain-like particle shape or connected body formed by chaining or linking, or by linking or linking the coalesced particles and the hexagonal plate.

(Composite powder of the present invention)
The composite powder of the present invention includes a base powder and ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface, and at least a part of the zinc oxide particles has a specific shape or form, That is, the following (A), (B) or (C) form or a form in which two or more of these forms are mixed:
(A) Form of coalesced particles formed by assembling at least a part of ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface of the base powder;
(B) the form of a hexagonal plate formed by further growth of the coalesced particles;
(C) A form of chain-like particles formed by chaining or linking the coalesced particles and / or the hexagonal plates.

  The base powder (also referred to as a substrate) used in the present invention is not particularly limited, and any powder of inorganic powder and organic powder may be selected, but is usually used for cosmetics. A powder is selected. Examples of such powder include clay mineral, metal oxide, metal hydroxide, composite oxide, resin powder, clay mineral-metal oxide composite, clay mineral-metal hydroxide composite, resin powder-metal. Examples thereof include oxide composites, resin powder-metal hydroxide composites, and resin powder-composite oxide composites.

  For the base powder, mica, synthetic mica, talc, synthetic talc, sericite, kaolin, titanium mica (silver luster pearl pigment, iris foil pearl pigment, etc.), colored pigment-coated pearl pigment, bismuth oxychloride, barium sulfate, Alumina, bismuth oxychloride, silica, boron nitride, titanium oxide, glass, iron oxide, PMMA, nylon, polyethylene, polypropylene, lauroyl lysine, zinc oxide (other than ultrafine zinc oxide constituting the above specific shape or form) 1), fish scale foil, and silicone elastic resin, one or more can be selected, and it is more preferable to select synthetic mica and / or mica titanium.

  There is no restriction | limiting in particular in the particle shape of the said base powder. For example, various shapes such as flaky shape, scaly shape, plate shape, spherical shape, spun shape, X shape, star shape, petal shape, starfish shape, ribbon shape, needle shape, hemispherical shape, rod shape and the like can be mentioned. In addition to being relatively inexpensive and easy to obtain and relatively easy to obtain the same reflection curve as the skin characteristics, it is easy to form a uniform film or layer on the surface, and stable optical characteristics are easily obtained. In this respect, it is preferable that the particle shape is any one of a flaky shape, a plate shape, a rod shape, and a spinning shape.

  The size of the powder particles used as the base powder is preferably about 1 to 100 μm, more preferably about 3 to 50 μm, and still more preferably about 5 to 30 μm, expressed as an average particle diameter. In the present invention, the particle diameter and average particle diameter are based on SEM unless otherwise specified.

  About the particle diameter of the zinc oxide particle of the ultrafine particle which has the said substantially hexagonal shape, it represents with an average particle diameter, Preferably the range of about 30-50 nm is selected.

  About the composition and amount of zinc oxide particles (including coalesced particles, chained particles, etc.) to be fixed, although depending on the type of base powder used in the present invention and the average particle size, etc., Zinc oxide so that the fixing rate of the zinc oxide particles is preferably about 10 to 100% by mass, more preferably about 10 to 80% by mass, and still more preferably about 20 to 70% by mass with respect to the base powder to be fixed. Particles can be used. When the fixing rate of the zinc oxide particles is less than 10% by mass, the surface of the base powder cannot be suppressed due to insufficient fixing or covering particles. Depending on the type of the base powder, shine, glitter, Since a flickering characteristic may be seen, it is not preferable. On the other hand, when the adhesion rate of zinc oxide particles exceeds 100% by mass, the powder (composite powder) tends to have a rough feeling, particularly when the base powder is an extender pigment such as talc, sericite, or mica. Yes, not preferable in terms of use feeling. Further, when the base powder is mica titanium, the interference color disappears excessively, and the finish tends to be whitish and thick to the skin, which may significantly impair the cosmetic effect. The sticking rate can be measured by the fluorescent X-ray method, but when prescribed in the present invention, it is determined by the fluorescent X-ray method.

  Moreover, the target effect is further improved by fixing the zinc oxide particles constituting a specific shape or form on the surface of the base powder so as to cover the surface. At this time, it is preferable that the coverage of zinc oxide particles (including coalesced particles, chained particles, etc.) fixed to the surface of the base powder is 10 to 80% of the surface area of the base powder. When the coverage is more than 80%, especially in the case of extender pigments such as talc, sericite and mica, the powder may feel rough, and in the case of titanium mica, the interference color May disappear excessively, resulting in a whitish and thick finish on the skin. When the coverage is less than 10%, the coating particles are too few to exhibit the diffusion characteristics, and the reflection characteristics of the base powder can be suppressed, but the characteristics such as shine, glitter, and flickering are observed. There is a case. The coverage can be obtained by quantifying the amount of zinc on the surface of the base powder by the fluorescent X-ray method and converting this to an oxide. It shall be based on such a method.

  In the composite powder of the present invention, at least a part of ultrafine zinc oxide particles having a specific shape ((A) substantially hexagonal shape fixed to the surface of the base powder on the surface of the base powder) (B) a hexagonal plate formed by further growth of the coalesced particles; (C) a chain of the coalesced particles and / or the hexagonal plates. Or a composite powder to which the zinc oxide particles constituting the linked particles are fixed). The form formed (configured) by the zinc oxide particles is the production conditions ( Refer also to Examples and the like below.) In particular, depending on the difference in the amount of water used (zinc ion concentration), reaction temperature, pH during the reaction, alkali dropping rate, addition of metal ions, etc., specific forms in the present invention Can be prepared.

  The composite powder of the present invention has a specific form in which zinc oxide particles (ultrafine zinc oxide particles having a substantially hexagonal shape) are fixed to the surface of the base powder particles constituting the composite powder. It is formed by. FIG. 1 schematically shows a crystal growth process of zinc oxide particles fixed on one surface of a base powder. As shown in FIG. 1, according to the present invention, ultrafine zinc oxide having a substantially hexagonal cross section (hexagonal polyhedron) is formed on the surface of the base powder by the following manufacturing method. The generated particles are further crystal-grown based on this, and the grown particles form coalesced particles and further grow to form hexagonal plate particles and chain particles. In addition, it is preferable to have many particles of such a form on the surface of the base powder.

  With respect to zinc oxide to be fixed to the base powder constituting the composite powder of the present invention, preferably at least about 30% by mass, more preferably at least about 50% by mass is fixed with the chain-like particles with respect to the total zinc oxide. It is preferable.

  The average particle diameter of zinc oxide constituting a specific form fixed on the base powder is preferably about 0.08 to 1.0 μm.

  That is, at least a part of ultrafine zinc oxide can be united or aggregated in the process of crystal growth on the surface of the base powder to form coalesced particles. The size is preferably about 0.08 μm to 0.4 μm, more preferably about 0.08 μm to 0.3 μm. When the average particle diameter is less than 0.08 μm, most of the light is transmitted, so that the diffusion characteristics may not be fully exhibited, which is not preferable.

  Further, at least a part of the coalesced particles further grows (stacks or aggregates) to form hexagonal plates and chain-like particles. With regard to the chain-like particles, the average length of the primary particles The thickness is preferably about 0.1 μm to 1.0 μm, more preferably about 0.13 μm to 0.8 μm. When the average particle diameter exceeds 1.0 μm, when a flaky powder or a plate-like powder is selected, a bright finish with a bare skin feeling may be impaired, and when mica titanium is selected. The interference color of the iris foil or the like tends to disappear, which may impair the texture of the makeup skin such as bare skin or transparency, and may also impair the effect on sagging skin, which is not preferable.

  In addition, the shape of the single particle which comprises the coalesced particle or the chain-like particle is a shape as shown in the following (1) and (2), that is, the corner portion composed of the surface and the surface (in a plurality of surfaces). The part which is comprised and has an angle | corner may have the shape which has a rounded curved surface. It is more preferable that a single particle having such a shape is included, because a higher light diffusion reflected light is exhibited by the reflected light from the lamination of these particles and their grain boundaries.

(1)

(2)

  What has a specific shape or form composed of such zinc oxide particles is preferably fixed to the base powder as a contact. Moreover, as understood from SEM observation (see FIG. 3), those having a specific shape or form composed of such zinc oxide particles adhere as uniformly and as much as possible to the entire surface of the base powder. Is preferable.

  About the composite powder of this invention, in the range which does not impair the effect, it can surface-treat using the surface treating agent normally used for cosmetics. Examples of the surface treatment method include silicone treatment, acrylic silicone treatment, metal soap treatment, lecithin treatment, amino acid treatment, fluorine treatment (eg, fluorine acrylate / polyalkylene glycol copolymer polymer treatment), collagen treatment, Disclosed in elastin treatment, hydrogenated lecithin treatment, higher alcohol treatment, higher fatty acid treatment, ester treatment, wax wax treatment, surfactant treatment, moisturizing treatment, and JP-A Nos. 2001-72527 and 2002-80748 It is possible to select a method using one or two or more types selected from currently used processing methods (methods of treating with a surface treatment agent to form two layers (mybrid treatment)).

(Production method)
There is no particular difficulty in producing the composite powder of the present invention, and it can be easily produced according to the description of the present specification, particularly the examples described later.

  About 29 to 130 times (mass) of water is used with respect to the amount of the base powder used. The amount of zinc compound used in the production of zinc oxide is about 2.5 to 25% by mass, more preferably about 2.5 to 10% by mass, based on the total mass including the base powder. The dispersion obtained by uniformly dispersing the base powder in water and dissolving the zinc compound therein is preferably heated to about 30 to 100 ° C. (more preferably about 40 to 80 ° C.) until the reaction is completed. Keep this temperature. The reaction time is about 4 to 15 hours, more preferably about 6 to 10 hours. This dispersion is preferably adjusted to a pH in the range of 5 to 12 (more preferably in the range of pH 6 to 9), and the alkaline solution is added dropwise under these conditions while adjusting to the consumption rate (disappearance rate) of the dropped alkali. After completion of dropping, cooling is performed at 20 to 50 ° C., filtering, washing with water, drying and pulverization to produce a composite powder in which ultrafine zinc oxide having a substantially hexagonal shape is fixed on the surface of the base powder. be able to.

  The zinc compound is not particularly limited as long as zinc ions are generated in a medium such as water or alcohol. Examples of such a zinc compound include zinc nitrate, zinc sulfate, zinc chloride, zinc carbonate, and zinc acetate. Of these, zinc nitrate and zinc sulfate are preferred because it is easy to suppress the generation of by-products and achieve the simplicity of the process.

  The amount of water used (zinc ion concentration), reaction temperature, reaction time, pH during the reaction, alkali dropping rate, etc. are control elements for the shape or form of the particles. The intensity of diffuse reflection and the change of gloss depending on the angle can be given. In addition, if necessary, a metal ion (for example, a saturated solution of a saturated solution such as a saturated metal oxide or a metal hydroxide) is added to the above dispersion for the purpose of controlling zinc oxide crystal growth. It can be added as long as it does not inhibit the formation of a specific form.

  Examples of the metal ions include zinc ions, magnesium ions, aluminum ions, and calcium ions, and these may be used alone or in combination of two or more. Each ion can be provided as a saturated solution of the corresponding metal hydroxide or oxide or carbonate compound.

  Examples of metal compounds for giving metal ions include magnesium compounds such as magnesium oxide, magnesium hydroxide and magnesium carbonate, aluminum compounds such as aluminum hydroxide and aluminum oxide, calcium compounds such as calcium hydroxide and calcium oxide, zinc oxide, Zinc compounds such as zinc hydroxide can be used.

  The composite powder of the present invention can be blended in a dispersion or cosmetic by the same method as blending a conventional powder or pigment.

  Next, considering the mechanism of action, in the present invention, zinc oxide prepared so as to constitute a specific shape or form is fixed to the surface of the base powder (base powder). As shown in FIG. 2, in the composite powder of the present invention, retroreflected light, specularly reflected light, diffusely reflected light in which light incident from a certain angle is reflected at various angles, and interference of these lights. Phase difference scattered light (reflection light of light transmitted through zinc oxide particles, substrate powder, or the interaction between the reflected light from the substrate powder surface and the reflected light from the substrate and zinc oxide composite layer) Interaction with the reflected light of the light that has passed through. That is, the effect of the present invention is obtained by the interaction of the return reflected light, the regular reflected light, the diffuse reflected light, and the phase difference scattered light. The composite powder of the present invention has an excellent feeling of bare skin, shows a color close to the skin (gives a tone close to natural skin color), brightens the skin, and optically corrects the sagging of the skin (more youthful) This interaction can be cited as a main reason for having the effect of making it look like.

  Further, the coated particles generally used are, for example, barium sulfate and the like, and the refractive index of 1.63 is close to the refractive index of skin 1.55, so that a transparent feeling is easily obtained. However, the refractive index of oils blended in cosmetics and sebum secreted from the skin is about 1.3 to 1.4, and the difference in refractive index between the coated particles and those oils is small and easy to be transparent. The function of the coated particles is often impaired. In the present invention, the refractive index of the zinc oxide particles to be fixed or coated is 2.0, and the difference between the cosmetic oil and sebum secreted from the skin is large. Furthermore, the ultrafine zinc oxide is composed of coalesced particles or chain particles. Since it constitutes a form and acts as primary particles, it has the effect of brightening the skin and optically correcting the sagging phenomenon while maintaining a feeling of bare skin on the entire skin. Moreover, as a result of observation over time clearly from the above-mentioned theory and test results, no transparency phenomenon is seen, and the sustainability of the effect can be sufficiently expected.

  In addition, coalesced particles, chain-shaped particles, and particles in the form of a hexagonal plate are fixed on the surface of the base powder, so there are fewer contact points between the powder and the skin, or the shape of the hexagonal plate Due to the state of the smooth surface etc. of the surface of a certain particle, the feeling of use becomes light, and when blended with cosmetics, it is excellent in fit and smoothly spread evenly on the skin. Favorable results are obtained.

  Since the composite powder of the present invention contains zinc oxide, it has an action or effect of blocking ultraviolet rays and also has a sebum absorption effect. The composite powder of the present invention can be used in combination with a commonly used ultraviolet absorber, and in that case, the ultraviolet blocking effect can be further enhanced.

  Examples of the ultraviolet absorber include octyl cinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate, ethyl-2,4-diisopropyl cinnamate, methyl-2,4-diisopropyl cinnamate. Propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, octyl-p-methoxycinnamate, 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p- Cinnamic acid UV absorption such as methoxycinnamate, ethyl-α-cyano-β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate Agent; 2,4- Hydroxybenzophenone, 2,2'-dihydroxy-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone 2-hydroxy-4-methoxy-4′-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4′-phenyl-benzophenone-2-carboxylate Benzophenone ultraviolet absorbers such as 2-hydroxy-4-n-octoxybenzophenone and 4-hydroxy-3-carboxybenzophenone; PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-di Paraaminobenzoic acid UV absorbers such as ethoxy PABA ethyl ester, N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, N, N-dimethyl PABA methyl ester; amino salicylate, menthyl salicylate, homomenthyl salicylate , Salicylic acid UV absorbers such as octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate; anthranilic acid UV absorbers such as methyl anthranilate; and 3- (4′-methylbenzylidene) -d-camphor -, 3-benzylidene-d, 1-camphor, urocanic acid, urocanic acid ethyl ester, octyl triazone, 2-phenyl-5-methylbenzoxazole, 2- (2'-hydroxy) 5 'methyl phenyl) benzotriazole, 4-methoxy-4'-t-butyl-dibenzo yl ultraviolet absorbers such as methane and the like.

(Cosmetics of the present invention)
The cosmetic of the present invention is a cosmetic containing the composite powder described above (the composite powder of the present invention). That is, the composite powder can be prepared as described above.

  In the cosmetic of the present invention, one or more of the composite powders can be used, and such a cosmetic is naturally included in the cosmetic of the present invention.

  In the present invention, there is no particular difficulty in prescribing cosmetics, and the intended cosmetics are based on techniques that have been used conventionally, in particular, techniques that use powders in cosmetics (for example, emulsification and the like). Obtainable.

  In the present invention, when selecting a composite powder prepared by selecting an extender pigment such as synthetic mica as the base powder and blending it into a cosmetic, the type of the cosmetic is not particularly limited. From the viewpoint of optical properties, it is particularly preferable to select a makeup cosmetic.

  When the composite powder of the present invention is blended in a cosmetic (cosmetic composition), particularly when a makeup cosmetic is selected, the blending amount is not particularly limited, but is preferably included in the total cosmetic composition. Is about 0.05 to 30% by mass, more preferably about 1 to 20% by mass, and still more preferably about 5 to 15% by mass.

  For example, when skin care cosmetics such as a milky lotion are selected, by blending the composite powder with about 0.5% by mass, an effect of maintaining a feeling of skin and making the skin look bright and uniform can be obtained. . In addition, when a makeup cosmetic such as a powder foundation is selected, for example, a zinc oxide-extreme pigment composite obtained by fixing zinc oxide to, for example, about 30% by mass of an extender pigment (for example, muscovite) is used. According to this, the effect of optically correcting the sagging of the skin can be seen conspicuously while maintaining a feeling of bare skin and making the skin look even brighter. However, when blended in an amount of 30% by mass or more, there is a tendency that the form retention, the feeling of bare skin, the effect of making the skin look bright and uniform, the effect of correcting skin sagging, etc. tend to be impaired, and the entire finish becomes powdery. This is not preferable because it may cause an adverse effect.

  In the case of using a composite powder prepared using a pigment having an interference color such as titanium mica as the base powder, it can be blended in an amount of 0.5% by mass or more based on the cosmetic. In addition, in order to impart the effect of brightening the entire skin while maintaining a feeling of bare skin, it is preferable to blend 1% by mass or more, and when considering the optical finish described above, 3% by mass or more is blended. It is more preferable to do. However, if it is blended in an amount of 20% by mass or more, it is not preferable because the interference color tends to be excessively emphasized and an unnatural finish tends to be exerted on the finished surface.

  In addition to the above composite powder, the cosmetics of the present invention include generally used powders and composite powders such as talc, kaolin, sericite, hydroxyapatite, barium sulfate, alumina, silica, and aluminum hydroxide. Powder, silica-alumina-titanium oxide-mica composite, hydroxyapatite-zinc oxide-sericite composite, hydroxyapatite-mica composite, silica-barium sulfate composite, silica-zinc oxide composite, hydroxylated An aluminum-mica complex, a bismuth oxychloride-mica complex, and the like can be blended as necessary within a range that does not impair the cosmetic effect in the present invention. In addition, ingredients conventionally blended in normal cosmetics, such as various oils, surfactants, water-soluble polymers, other powders, moisturizers, preservatives, drugs, ultraviolet absorbers, dyes, inorganic salts, organic A salt, a fragrance, a chelating agent, a pH adjuster, water and the like can be appropriately blended.

  Examples of the oil include liquid paraffin, petrolatum, paraffin wax, squalane, beeswax, carnauba wax, olive oil, lanolin, higher alcohol, fatty acid, higher fatty acid, ester oil, ceresin, microcrystalline wax, candelilla wax, diglyceride, triglyceride, Examples include oils commonly used in cosmetics such as silicone oil, perfluoropolyether, perfluorodecalin, perfluorooctane, jojoba oil, octyldodecyl myristate, and neopentyl glycol dioctanoate.

  Examples of the surfactant include polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene hydrogenated castor oil , Nonionic surfactants such as polyoxyethylene sorbitol fatty acid esters; anionic surfactants typified by fatty acid soaps such as sodium stearate and triethanolamine palmitate; and cationic surfactants and amphoteric surfactants And surfactants widely used in cosmetics such as these.

  Examples of water-soluble polymers include carboxymethylcellulose, methylcellulose, hydroxymethylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, tragacanth gum, carrageenan, locust bean gum, dextrin, dextrin fatty acid ester, carboxyvinyl polymer, xanthan gum, gelatin, sodium alginate, gum arabic. And water-soluble polymers widely used in cosmetics such as

  Examples of the drug include vitamin A oil, retinol, retinol palmitate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, nicotinic acid DL-α-tocopherol, magnesium ascorbate phosphate, vitamin D2 (ergocassipherol), dl-α-tocopherol, dl-tocopherol, 2-L-ascorbic acid diester potassium, dl-α-tocopherol acetate, pantothenic acid, vitamins such as biotin, hormones such as estradiol and ethinylestradiol, arginine, aspartic acid, cystine, Amino acids such as cysteine, methionine, serine, leucine, tryptophan, anti-inflammatory agents such as allantoin, glycyrrhetinic acid, azulene, whitening agents such as arbutin, astringents such as tannic acid, L- Ntoru, fresheners or sulfur camphor, lysozyme chloride, pyridoxine chloride, .gamma.-oryzanol, and the like. In addition, the drug can be used in a free state, and those capable of salt formation are used in the form of an acid or base salt, and those having a carboxylic acid group are used in the form of an ester. Can do.

  About the said ultraviolet absorber, the same thing as what was described in the composite powder of the said this invention can be used.

  The form and type of the cosmetics in the present invention are not particularly limited, and any form of cosmetics presently present and all cosmetic dosage forms sold in the future can be selected. For example, conventionally known dosage forms can be selected such as emulsion, cream, solid, paste, gel, powder, multilayer, mousse, and spray. Specifically, as makeup cosmetics, makeup foundation, powder foundation, liquid foundation, oil foundation, stick foundation, pressed powder, face powder, foot powder, body powder, lipstick, lipstick overcoat, lip gloss, concealer, rouge , Eyeshadow, eyebrow, eyeliner, mascara, water-based nail enamel, oil-based nail enamel, emulsified nail enamel, enamel top coat, enamel base coat, whitening cream, milky lotion, neck (neck) cream, lotion, essence, pack , Carmine lotion, body lotion, liquid face wash, face wash foam, face wash cream, face wash powder, makeup cleansing, body gloss, sunscreen or sun cream etc. Hair gloss, hair cream, hair shampoo, hair rinse, hair color, hair spray, spray; roll-on type, powder type deodorant products, other soaps, bath preparations Etc. can be exemplified.

(Uses other than cosmetics)
The composite powder (composite powder of the present invention) is applicable not only to cosmetics but also to paints, pharmaceuticals and quasi drugs. In addition, when applying the composite powder of the said description to these products, these can be implemented easily with reference to the description content in the cosmetics of the said this invention.

  Hereinafter, the present invention will be described in more detail by way of examples. In addition, this invention is not limited by this, The compounding quantity of each component in the Example of cosmetics is shown by the mass% with respect to cosmetics whole quantity.

[Example 1]
Weigh out 33.5 g of muscovite with an average particle size of 6 μm as a flaky powder (base powder), put it in a 3,000 ml round bottom separable flask, and add 750 ml of ion-exchanged water and saturated aluminum hydroxide. 60 ml of the supernatant was added, stirred and mixed, and uniformly dispersed. Zinc nitrate (58.0 g) was added to the dispersion and completely dissolved in the dispersion to obtain a muscovite slurry dispersion. Subsequently, this dispersion was heated to 75 ° C., and thereafter this temperature was maintained until the end of the reaction. When this temperature was stabilized, 50 ml of 1N NaOH was added dropwise, then, 100N of 1.5N NaOH and 110.7 ml of 1.75N NaOH were successively added over 8 hours and 41 minutes. Stirring was continued at 75 ° C. for 30 minutes from the end of dropping. Thereafter, it was cooled to 40 ° C., filtered and dried at 70 ° C. After drying, pulverization was performed to obtain a composite powder of zinc oxide-muscovite. In addition, the adhesion rate of zinc oxide in the obtained composite powder was 32% by mass.

  An SEM photograph of the obtained composite powder was taken and shown in FIG. 4 (× 100,000). From this figure, it can be seen that in the product of the present invention, many coalesced particles are fixed on the surface of the base powder.

[Comparative Example 1]
32 g of fine particle zinc oxide was added to 68 g of muscovite, and after sufficiently stirring, it was pulverized with a pulverizer to obtain a comparative sample.

[Example 2]
Weigh 19.0 g of red interference system mica titanium with an average particle size of 6 to 48 μm as a base powder, put it in a round bottom separable flask with a volume of 3,000 ml, add 600 ml of ion exchange water to this and stir and mix. , Uniformly dispersed. To this dispersion, 58.0 g of zinc nitrate was added and completely dissolved in the dispersion to obtain a slurry dispersion of red interference system titanium mica. The dispersion was then heated to 70 ° C. and thereafter kept at this temperature until the reaction was completed. When this temperature was stabilized, 50 ml of 1N NaOH, 100 ml of 1.5N NaOH, 100 ml of 1.75N NaOH, and 7.9 ml of 2.0N NaOH were successively added dropwise over 9 hours and 8 minutes. Stirring was continued at 70 ° C. for 60 minutes from the end of dropping. Thereafter, it was cooled to 40 ° C., filtered and dried at 70 ° C. After drying, a pulverization process was performed to obtain a red white powder. In addition, the adhesion rate of fine particle zinc oxide in the obtained composite powder was 46 mass%.

  About the obtained composite powder, the SEM photograph was taken and it showed in FIG. 5 (* 100,000). From this figure, it can be seen that in the product of the present invention, many chained particles are fixed on the surface of the base powder.

[Comparative Example 2]
After adding 46 g of fine particle zinc oxide to 54 g of red interference pigment mica titanium, the mixture was sufficiently stirred and pulverized with a pulverizer to obtain a comparative sample.

[Examples 3 to 5]
39.5 g of various extender pigments (Example 3; synthetic mica, Example 4; talc, Example 5; spherical alumina) having an average particle diameter of about 8 μm were weighed as the base powder, and any of these was weighed 3,000 ml. Was added to a round bottom separable flask, and 750 ml of ion-exchanged water was added thereto and mixed by stirring to disperse uniformly. To this uniform dispersion, 58.0 g of zinc nitrate was added and completely dissolved in the dispersion to obtain slurry dispersions of various extender pigments. The dispersion was then heated to 70 ° C. and held at this temperature until the reaction was complete. From the time when the temperature of 70 ° C. was stabilized, 50 ml of 1N NaOH, 100 ml of 1.5N NaOH, and 109.8 to 110.1 ml of 1.75N NaOH were successively added dropwise over 9 hours 15 minutes to 9 hours 40 minutes. When the dropping was completed, stirring was continued at 70 ° C. for 30 minutes. Thereafter, it was cooled to 40 ° C., filtered and dried at 70 ° C. After drying, pulverization was performed to obtain a composite powder of zinc oxide based on each extender pigment. In addition, the adhesion rate of the fine particle zinc oxide in the obtained composite powder was 29 mass%.

[Example 6]
Weigh out 33.5 g of muscovite with an average particle size of 6 μm as a flaky powder (base powder), put it in a 3,000 ml round bottom separable flask, and add 750 ml of ion-exchanged water and saturated aluminum hydroxide. 60 ml of the supernatant was added, stirred and mixed, and uniformly dispersed. Zinc nitrate (58.0 g) was added to the dispersion and completely dissolved in the dispersion to obtain a muscovite slurry dispersion. Subsequently, this dispersion was heated to 75 ° C., and thereafter this temperature was maintained until the end of the reaction. When this temperature was stabilized, 50 ml of 1N NaOH was added dropwise, then, 100N of 1.5N NaOH and 110.7 ml of 1.75N NaOH were successively added over 8 hours and 41 minutes. Stirring was continued at 75 ° C. for 30 minutes from the end of dropping. Further, 9 g of one-end trimethoxy-modified dimethyl silicone / IPA solution (1: 1 (mass%)) was added. Thereafter, it was cooled to 40 ° C., filtered and dried at 70 ° C. After drying, a pulverization treatment was performed to obtain a zinc oxide-muscovite mica composite powder surface-treated with trimethoxy-modified dimethyl silicone.

[Example 7]
Example 6 is the same as Example 6 except that disodium stearolyl glutamate (Ajinomoto Co., Inc. HS-21P) is used instead of the one-terminal trimethoxy-modified dimethyl silicone / IPA solution (1: 1 (mass%)). By the method, a zinc oxide-muscovite mica composite powder surface-treated with stearoyl glutamic acid was produced.

[Comparative Example 3]
29 g of fine particle zinc oxide was added to 71 g of synthetic mica and stirred sufficiently, and then pulverized with a pulverizer to prepare a comparative sample.

[Comparative Example 4]
A comparative sample was produced in the same manner as in Comparative Example 3 except that talc was used instead of synthetic mica.

[Comparative Example 5]
A comparative sample was produced in the same manner as in Comparative Example 3 except that spherical alumina was used instead of synthetic mica.

[Examples 8 to 10]
19.0 g of various interference type mica titaniums having an average particle diameter of 6 to 48 μm (Example 8; yellow interference color, Example 9; green interference color, Example 10; blue interference color) as the base powder were weighed. Any one of the above was placed in a 3,000 ml round bottom separable flask, and 600 ml of ion exchange water and 60 ml of a saturated magnesium hydroxide supernatant were added thereto, stirred and mixed to uniformly disperse. To this dispersion, 58 g of zinc nitrate was added and completely dissolved in the dispersion to obtain various interference color slurry dispersions. The dispersion was heated to 75 ° C., and this temperature was maintained until the reaction was completed. When this temperature was stabilized, 50 ml of 1N NaOH, 100 ml of 1.5N NaOH, 1100 ml of 1.75N NaOH, and 7.9 to 8.4 ml of 2N NaOH were successively added dropwise over 8 hours 58 minutes to 9 hours 10 minutes. Stirring was continued for 60 minutes from the end of dropping. Thereafter, the mixture was cooled to 40 ° C., filtered, and dried at 70 ° C. After drying, it was pulverized to obtain various mica titanium-based white powders. In addition, the adhesion rate of fine particle zinc oxide in the obtained composite powder was 46 mass%.

[Comparative Example 6]
After adding 46 g of fine particle zinc oxide to 54 g of yellow interference color white powder and sufficiently stirring, it was pulverized with a pulverizer to prepare a comparative sample.

[Comparative Example 7]
A comparative sample was produced in the same manner as in Comparative Example 6 except that a red interference white powder was used instead of the yellow interference white powder.

[Comparative Example 8]
A comparative sample was produced in the same manner as in Comparative Example 6 except that a green interference white powder was used instead of the yellow interference color white powder.

[Comparative Example 9]
A comparative sample was produced in the same manner as in Comparative Example 6 except that a blue interference color white powder was used instead of the yellow interference color white powder.

[Example 11, Comparative Examples 10 and 11] Production of Powder Foundation Based on the composition shown in Table 1 below, various powder foundations were produced by the following production methods.

(Production method)
The component (A) was put into a Henschel mixer, mixed with stirring, taken out, and pulverized with a pulverizer. Thereafter, the pulverized product was transferred again to a Henschel mixer, and the component (B) was further added. After sufficiently stirring and mixing, the pulverized product was taken out, pulverized, and then filled into an intermediate dish to obtain the desired powder foundation.

Example 12 and Comparative Example 12 Production of Face Powder Various face powders were produced by the following production method based on the composition shown in Table 2 below.

(Production method)
The component (A) was put into a Nauter mixer, stirred and mixed, taken out, and pulverized with a pulverizer. Thereafter, the pulverized product was transferred to a Henschel mixer, and the component (B) was further added. After sufficiently stirring and mixing, the pulverized product was taken out. .

[Evaluation Example 1] Comparative evaluation between the cosmetics obtained in each Example and the cosmetics obtained in each Comparative Example The various cosmetics obtained in the above Examples and Comparative Examples were evaluated.

(Evaluation methods)
For various cosmetics, an actual use test with 12 female panels was conducted, and the skin feel, the effect of brightening the skin, the effect of correcting skin sagging, the natural finish, and the feeling of use (smoothness) when applied The evaluation was made based on the following criteria.

Evaluation criteria for actual use characteristics

(Evaluation results)
(1) Powder foundation The results are shown in Table 3.

  As is apparent from Table 3, the cosmetic of the present invention, that is, the cosmetic containing the composite powder obtained in Example 1 (powder foundation of Example 11) has an effect of brightening the skin and sagging of the skin. It had a correction effect and gave a natural finish with a feeling of bare skin. In addition, it was smooth and light to the touch. On the other hand, the cosmetic containing the powder obtained in Comparative Example 1 (powder foundation of Comparative Example 10) does not exhibit the effect of correcting skin sagging, and further provides a natural finish with a feeling of bare skin. It was not a thing. Similarly, the powder foundation of Comparative Example 11 did not exhibit the effect of brightening the skin or correcting the sagging of the skin, and did not give a natural finish due to lack of skin feeling.

(2) Face powder The results are shown in Table 4.

  As is apparent from Table 4, the cosmetic (the face powder of Example 12) containing the composite powder obtained in Example 2 and the composite powder obtained in Example 8 has an effect of brightening the skin. It had a skin sagging correction effect and gave a natural finish with a feeling of bare skin. In addition, it was smooth and light to the touch.

[Example 13] Manufacture of milky lotion Based on the composition shown in Table 5 below, a milky lotion was produced by the following method.

(Production method)
The component (A) was mixed while being kept at 75 ° C. and dispersed uniformly. A mixture of the component (B) dissolved and uniformly mixed (dispersed) at 75 ° C. was gradually added thereto and emulsified. When the emulsification was completed, the emulsion was cooled to 30 ° C. and filled into a container to obtain a desired emulsion.

[Example 14] Production of powder eye shadow A powder eye shadow was produced by the following production method based on the composition shown in Table 6 below.

(Production method)
The component (A) was put into a Henschel mixer, mixed uniformly, taken out, and pulverized with a pulverizer. After that, the pulverized product is transferred again to the Henschel mixer, and then the component (B) is added, stirred and homogenized, taken out, pulverized with a pulverizer, passed through a blower shifter, filled into an inner dish and the desired powder. I got an eye shadow.

Example 15 Production of O / W Type Foundation Based on the composition shown in Table 7 below, an O / W type foundation was produced by the following production method.

(Production method)
The component (A) was mixed while being kept at 75 ° C. and dispersed uniformly. The mixture of component (B) dissolved and mixed (dispersed) at 75 ° C. was gradually added and emulsified. When the emulsification was completed, the emulsified product was cooled to 30 ° C., and the component (C) was added thereto, stirred, and filled into a container to obtain a desired O / W type foundation.

[Evaluation Example 2] Evaluation of Cosmetics Obtained in Examples 13-15 Various cosmetics obtained in Examples 13-15 were evaluated.

(Evaluation results)
The cosmetics obtained in Examples 13 to 15 were all excellent in the effect of brightening the skin while maintaining a feeling of bare skin, were able to correct the sagging of the skin, and gave a natural finish. Furthermore, it had a smooth and light touch when used.

  According to the present invention, it is possible to easily and simply produce a cosmetic material that has a bright face (skin), is excellent in skin feel when applied, and also corrects skin sagging. Therefore, the present invention is extremely useful industrially, particularly in the cosmetic field.

1: Retroreflected light 2: Regularly reflected light on the surface of zinc oxide particles having a specific shape or form 3: Regularly reflected light on the surface of the substrate powder 4: Diffuse reflected light 5: Reflection of light transmitted through the zinc oxide particles Light (phase difference scattered light)
6: Reflected light (phase difference scattered light) transmitted through the substrate powder
7: Zinc oxide particles having a specific shape or form 8: Base powder

Claims (8)

A base powder and ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface, and at least a part of the zinc oxide particles is in the form of the following (A), (B) or (C) A composite powder characterized in that two or more of these forms are mixed together:
(A) Form of coalesced particles formed by assembling at least a part of ultrafine zinc oxide particles having a substantially hexagonal shape fixed to the surface of the base powder;
(B) the form of a hexagonal plate formed by further growth of the coalesced particles;
(C) A form of chain-like particles formed by chaining or linking the coalesced particles and / or the hexagonal plates.   The composite powder according to claim 1, wherein the base powder is a flaky powder.   The composite powder according to claim 2, wherein the flaky powder is one or more selected from the group consisting of plate-like powder, mica titanium, and colored pigment-coated pearl pigment.   The plate-like powder is selected from the group consisting of talc, sericite, mica, kaolin, synthetic mica, synthetic talc, fish scale foil, bismuth oxychloride, silver luster pearl pigment, iris foil pearl pigment and colored pigment-coated pearl pigment. The composite powder according to claim 3, which is one kind or two or more kinds.   The composite powder according to any one of claims 1 to 4, wherein a particle diameter of the zinc oxide particles of the ultrafine particles having a substantially hexagonal shape is 30 to 50 nm in terms of an average particle diameter.   Cosmetics which mix | blended the composite powder as described in any one of Claims 1 thru | or 5.   The cosmetic according to claim 6, which is a makeup cosmetic.   The cosmetic according to claim 6 or 7, wherein the composition ratio (mass ratio) of the zinc oxide particles and the base powder is 90/10 to 10/90.