JP2003055573A - Laminate type coherent spheroidal pigment and cosmetic formulating the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a cosmetic excellent in usability such as slip properties and coloring in a coherent color which are unattainable in conventional technology, capable of concealing shape troubles of the skin such as wrinkles, poil foramens and roughness of texture together with improving color tone troubles such as ruddy face, freckle, blot and dark skin. SOLUTION: This invention solves the above problems by providing (1) a laminated type coherent spheroidal pigment comprising mono dispersed spheroidal particles, having a core-shell structure comprising alternating layers of a metal oxide having a low refractive index and a metal oxide having a high refractive index, and (2) a laminated type coherent spheroidal pigment, having a core-shell structure comprising alternating three or more layers of the metal oxide having the low refractive index and the metal oxide having the high refractive index. This invention also solves the above problems by providing the cosmetic including the laminated type coherent spheroidal pigment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is in the technical field of a light interference material acting as an interference coloring material and a cosmetic material containing the light interference material.

[0002]

2. Description of the Related Art Recently, various coherent coloring materials have been widely used in response to demands for the design of cosmetics and the variety of colors of cosmetics and cosmetic coating films. That is, the coherent coloring material is a pigment utilizing the phenomenon of interference of light, and a typical example that has been used for a long time is mica titanium, which is a thin flaky mica coated with titanium dioxide. That is, mica titanium is titanium dioxide having a slightly higher refractive index (refractive index n = 2.3 to 2.2) on the surface of mica flakes (refractive index n = 1.5 to 2.0) made of flake-like mica. 7) The optical thickness (Optical T
Hickness: product of refractive index and geometrical thickness). However, conventional mica titanium
Although various colors can be formed, since titanium dioxide is a single layer, the light reflectance is low and the color is very pale.

In addition, in recent years, Japanese Patent Laid-Open No. 07-24636
6 gazette, special table 2000-501774 gazette, special table 2
For the purpose of solving the above-mentioned problems, there is proposed a multilayer interference pigment in which a transparent carrier material is coated with alternating layers of a low-refractive-index metal oxide and a high-refractive-index metal oxide in order to solve the above-mentioned problems. Moreover, these publications are based on the following known basic principles.

Thus, products having an interference color are interrelated in the thickness of these layers. The interference color appearing in a thin layer is the optical thickness, where n is the refractive index of the layer and d is the geometrical thickness of the layer. Assuming that reflected light is generated upon incidence of vertical light, the color of such a thin film has an increase of light of arbitrary wavelength λ = (4 / 2N−1) · nd and an attenuation of light of arbitrary wavelength λ = ( 2 / N) .nd (where N is a positive integer). The color change that occurs as the film thickness increases results from the increase or attenuation of the wavelength of arbitrary light due to interference. For example, 2.0
A 115 nm thick film of titanium dioxide having a refractive index of 115 nm has an optical thickness of 115 × 2.0 = 230, and light of wavelength 2 × 230 = 460 nm (blue) is attenuated during reflection, As a result, the reflected light becomes yellow. In the case of multilayer interference pigments, the interference color is determined by the increase (or attenuation) of light of any wavelength, and if two or three layers in the multilayer interference pigment have the same optical thickness, the color of the reflected light is even stronger. And becomes more complete as the number of layers increases. That is, in the above-mentioned publication, the reflectance of conventional mica titanium is increased by coating the transparent carrier material with alternate layers of a low-refractive index metal oxide and a high-refractive index metal oxide, that is, dark interference light. The present invention relates to the provision of a multilayer interference pigment that develops a color.

However, the above-mentioned multilayer interference pigments currently provided have particles such as flake-like or plate-like mica as a carrier material, silica, and the like, and cosmetics containing them lack smoothness. The problem is recognized. Furthermore, since the conventional interference pigments generally have a very high gloss, the blending amount thereof in the cosmetics tends to be limited.

Further, it is intended to avoid the above-mentioned problems caused by the carrier material being flaky or plate-shaped.
No. 36315 discloses a refractive index n = 1.
40 to 1.60 spherical particles have a refractive index n = 2.00
There is a proposal of a coloring composition which is coated with the coating components in 2.90 to obtain a desired interference color. However, although the composite powder proposed in this publication improves the lack of smoothness of conventional flaky or plate-like interference pigments and suppresses excessive luster, it is a cause of interference pigments. There was a drawback in that the color of interference color, which can be said to be the case, was very weak.

[0007]

DISCLOSURE OF THE INVENTION The present invention has excellent usability such as slipperiness and excellent interference color development, which has not been achieved by the prior art, and has a wrinkle, a pore, and a rough texture. It is an object of the present invention to provide a cosmetic composition which can conceal the morphological troubles and improve the color tone troubles such as reddish face, spots, freckles, and dullness.

[0008]

Means for Solving the Problems As a result of intensive studies, the present inventor has formed a plurality of layers of metal oxides having a specific relationship in refractive index between the layers, and has a specific structure and a specific shape. It has been found that a laminated interference spherical pigment can solve the above problems.

The present invention has been made based on the above findings, and comprises an alternating layer of a metal oxide having a low refractive index and a metal oxide having a high refractive index, and has a core-shell structure,
Further, the present invention provides a laminated interference spherical pigment characterized by being monodisperse spherical particles.

Further, the present invention is characterized by comprising at least three or more alternating layers of a metal oxide having a low refractive index and a metal oxide having a high refractive index, and having a core-shell structure. A type interference spherical pigment is provided.

Further, the present invention provides a cosmetic containing the above-mentioned laminated interference spherical pigment.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION [Layered interference spherical pigment]
The laminated interference spherical pigment of the present invention will be described in detail based on its preferred embodiment.

The present invention is a laminated interference spherical pigment composed of alternating layers of a metal oxide having a low refractive index and a metal oxide having a high refractive index, having a core-shell structure, and having monodisperse spherical particles. (Hereinafter, this invention is referred to as "first invention".)
Is provided. Hereinafter, the first invention will be described in detail. The laminated interference spherical pigment of the invention (first invention) is
Because of the above-mentioned constitution, when applied to cosmetics,
Good slidability, strong interference color development, morphological trouble improvement effect and color tone trouble improvement effect, and further an effect of obtaining a natural finish.

The multilayer interference spherical pigment of the present invention has a spherical shape having a core-shell structure. When applied to cosmetics, this spherical shape acts as a kind of ball bearing during application of the cosmetics, and has the effect of dramatically improving the slipperiness of the cosmetic substrate. Further, the spherical shape exerts an effect of effectively scattering light on the surface of the cosmetic coating film and concealing morphological troubles of the skin due to light reflection. Here, the term “spherical shape” means a true spherical shape or a substantially spherical shape, but a true spherical shape is preferable in order to further exert the effects of the present invention.

In the present invention, the core-shell structure is a structure composed of a core portion (a core portion) and a shell portion (a shell portion) covering the core portion. Here, the core portion is preferably spherical because the laminated interference spherical pigment of the present invention is finally spherical.

The core-shell structure in the laminated interference spherical pigment of the present invention is composed of alternating layers in which a metal oxide having a low refractive index and a metal oxide having a high refractive index are alternately coated. The core-shell structure in the present invention may have a two-layer structure including a core portion and a single shell portion layer, or may have a laminated structure including three or more layers including a core portion and a plurality of shell portions. The laminated structure of the alternating layers can effectively develop color by light having an arbitrary wavelength. Further, when a strong interference effect is desired, a laminated structure of three or more layers including a core portion and a shell portion is preferable. In addition, in the present invention, the core portion is counted as one layer.

The positions of the metal oxide having a low refractive index and the metal oxide having a high refractive index in the alternating layers are different from those in the case where the metal oxide having a low refractive index is arranged in the core portion as the first layer. , Respectively, depending on the case where a metal oxide having a high refractive index is arranged. That is, when the core portion as the first layer is a metal oxide having a low refractive index,
The shell portion as the second layer is a metal oxide having a high refractive index, the shell portion as the third layer is a metal oxide having a low refractive index, ... On the other hand, when the core portion as the first layer is a metal oxide having a high refractive index, the shell portion as the second layer is a metal oxide having a low refractive index, and the shell portion as the third layer is Are sequentially arranged alternately with a metal oxide having a high refractive index, .... In any case, the core is preferably made of a material whose optical thickness can be controlled.

The metal oxide having a low refractive index and the metal oxide having a high refractive index used in the present invention are not particularly limited in their types etc. as long as they have a relationship in which the refractive indexes are different from each other (relationship between high and low). It is not limited.

The difference in refractive index between the metal oxide having a low refractive index and the metal oxide having a high refractive index is preferably 0.1 or more in order to further improve the effects of the present invention.

Here, a metal oxide material having a low refractive index
As a body example, SiO_Two, Al_TwoO _Three, And these gold
Examples include complex metal oxides that are complex metal oxides.
It

On the other hand, a specific example of a metal oxide having a high refractive index
As an example, TiO_Two, Ti₂O, TiO, Ti
_TwoO_Three, Ti_ThreeO₅, Ti_FourO, ZrO_Two, Fe
_TwoO_Three, Fe_ThreeO _Four, ZnO and their metal oxides
Examples thereof include composite metal oxides obtained by compounding.

In particular, a metal having a low refractive index is used because it is relatively easy to ensure the independence of components in each layer of the laminated layer (alternate layer) including the core portion and to form a coating film. It is preferable to use SiO ₂ (silica) as the oxide and TiO ₂ (titanium dioxide) as the high-refractive-index metal oxide.

If desired, the layer formed of the metal oxide having a low refractive index may contain an alkali metal oxide and an alkaline earth metal oxide as its constituent components. At this time, the alkali / alkaline earth metal oxide is a relationship between a layer formed of the metal oxide having the low refractive index and a layer adjacent to the layer (layer formed of the metal oxide having the high refractive index). It is used in a range that does not adversely affect (high and low refractive index).

The laminated interference spherical pigment of the present invention is, as described above, monodisperse spherical particles. Therefore, particularly in the effect of light interference, the effect of enhancing the color development of the interference light and sufficiently improving the color tone trouble is exhibited by the retroreflection. In addition, since the laminated interference spherical pigment of the present invention is thus monodisperse particles, the core portion, which is the core material, is naturally monodisperse particles, especially those having a uniform particle size. preferable.

The term "monodisperse" as used in the present invention means that the particle size distribution is narrow, and the coefficient of variation of the particle size (standard deviation of the particle size based on the average particle size in percentage). The indicated value) is preferably 10% or less, more preferably 5% or less.

To obtain the monodisperse spherical particles, known means,
For example, as described in Japanese Patent Publication No. 08-11681 or Japanese Patent Publication No. 07-91066, hydrolysis of metal alkoxide and subsequent polycondensation method may be used. In particular, in order to obtain particles having a uniform particle size, it is preferable to classify commercially available spherical particles with a sieve or the like.

The laminated interference spherical pigment of the present invention is capable of visually exhibiting the effect of improving skin morphological troubles in the same visual sense.
As the spherical pigment, those having a particle size in the entire range which can be practically used for cosmetics can be applied, and in particular, the volume average particle size (volume cumulative average particle size) is 0.15 to 2.0 μm. preferable. This range is a particle size range in the same level as the visible light wavelength, and is preferable because the diffusion efficiency of visible light can be increased. Further, those in such a range, by the spherical shape of the laminated interference spherical pigment of the present invention, in particular to diffuse the light on the surface to reduce the difference in brightness between the skin crest and skin groove. In addition, the effect of concealing morphological troubles such as wrinkles can be further improved in combination with the action mechanism.

The volume average particle diameter of the laminated interference spherical pigment of the present invention has a great influence on the above-mentioned light interference effect, but when the particle diameter range deviates more than the range of the same level as the visible light wavelength. In some cases, the spherical pigment becomes achromatic (that is, the saturation decreases), and interference light cannot be obtained. In the present invention, when simply referred to as “average particle size” or “particle size”, the volume cumulative average particle size is shown.

When the laminated interference spherical pigment of the present invention is surface-treated with a known treating agent, the effect of the present invention may be reduced. For this reason, it is desirable that the laminated interference type spherical pigment of the present invention does not change the surface composition or the composition as a simple substance by physical treatment or chemical treatment.

However, when the surface treatment is applied to the laminated interference type spherical pigment of the present invention, as the surface treatment agent, a silicone compound such as dimethylpolysiloxane or methylhydrogenpolysiloxane or a fluoro compound such as fluoroalkyl phosphate ester is used. In the case of using, since the chemical structure or refractive index of the laminated interference-type spherical pigment is not extremely changed, the effect of the present invention can be sufficiently exhibited and can be applied in the present invention.

The laminated interference spherical pigment of the present invention is not particularly limited in its production method. For example, when the alternating layers are composed of two layers, a substance which forms the core part by a wet method ( The low refractive index material or the high refractive index material) is coated with the material forming the shell portion. That is, by appropriately selecting a metal oxide having a low refractive index and / or a metal oxide having a high refractive index for forming the shell portion, and hydrolyzing a water-soluble metal compound corresponding thereto, the core The material forming the part can be coated as a hydrated metal oxide. Then, the core portion coated with the obtained hydrated metal oxide is separated, dried,
Then, the pigment produced as desired is calcined to obtain the laminated interference spherical pigment of the present invention.

For example, in the case of coating titanium dioxide, hydrous titanium dioxide is deposited on the surface of the substance forming the core portion (core particle) in an aqueous solution of an inorganic acid salt of titanium (eg, titanyl sulfate). Then, a method of heating this in the atmosphere or a method of hydrolyzing and baking the titanium alkoxide while contacting the titanium alkoxide with the core particles in a solvent can be used.

Further, for example, in the case of coating with silica, in a sodium hydroxide aqueous solution whose pH is adjusted, the sodium silicate solution is brought into contact with the surfaces of the core particles,
A method in which hydrochloric acid is added to precipitate hydrous silica, which is washed, dried, and heated can be used.

When the number of laminated layers (alternate layers) including the core portion is three or more, the above-described coating operation for forming the shell portion may be repeated as many times as necessary so that the desired number of layers is obtained.

The laminated interference spherical pigment of the present invention is
The effect of the present invention is exhibited by blending with cosmetics. In order to achieve the effect more efficiently, it is preferable that the multilayer interference spherical pigment in the cosmetic coating film is present in a state close to a single layer. When the layer formed by the laminated interference spherical pigment in the cosmetic coating film is thick, the transparency of the cosmetic coating film is lost, that is, transmitted light is internally diffused and attenuated in the layer formed of the laminated interference spherical pigment. As a result, the complementary color effect may not be exhibited, and the natural finish feeling according to the present invention may be lost.

In order to effectively use the laminated interference-type spherical pigment of the present invention, it is preferable to arrange the pigment on the skin surface or the cosmetic coating film surface in a state close to a single layer.
For example, when the laminated interference spherical pigment of the present invention is used for a foundation or the like, it is preferable to spread it thinly and uniformly. Further, when the laminated interference spherical pigment of the present invention is used in cosmetics for makeup finishing and cosmetics for redressing, the effect of the present invention is more effective by a coating method such that a thin film is formed by the pigment. Is expressed.

Here, the effect of improving color tone troubles by the laminated interference spherical pigment of the present invention will be described in detail. The laminated coherent spherical pigment of the present invention can cause light of an arbitrary wavelength to interfere and develop color due to a light interference effect due to its structure. That is, when white light is incident on the laminated interference spherical pigment of the present invention, reflected interference light and transmitted light are different,
By making this transmitted light a wavelength of light near the complementary color to the scattered light of the part that is recognized as a skin tone problem,
It is possible to make skin color problems less noticeable.

As a method for simply evaluating the phenomenon in which the reflected light and the transmitted light are different from each other, it is possible to visually evaluate the phenomenon that a laminated type interference spherical pigment having a different structure is thinly applied on black artificial leather. There is a method of evaluating the color tone of reflected light. In this evaluation method, light having a wavelength near the complementary color of the color of the reflected light recognized by visual observation is transmitted.

The layered coherent spherical pigment of the present invention has good usability such as slipperiness and is excellent in color development of interference color even if light of any wavelength interferes and develops color, but the effect of the present invention In order to effectively bring out (especially the effect of improving the color tone trouble), the following is preferable.

That is, among the color tone troubles, in order to exert the effect of concealing the yellow-red color tone trouble, the transmitted light has a maximum reflection peak (blue-green) at a wavelength of 400 to 550 nm. It is preferable to add it to cosmetics. Further, in the case of exhibiting the effect of concealing the blue-green color tone trouble, the laminated coherent spherical pigment of the present invention has a maximum reflection peak (yellow-red) in transmitted light at a wavelength of 550 to 750 nm. It is preferable to make it into a composition and mix it with a cosmetic.

For example, in order to hide a color tone trouble portion where a bluish purple color of the skin is strongly recognized, such as blue bruise (eg, Ota nevus), the laminated interference spherical pigment of the present invention can be used as a transmitted light. However, it is preferable to employ a material capable of obtaining a reflection peak near a wavelength of 570 nm (yellowish green). Further, as long as it hides a color tone trouble portion where reddish purple color such as red bruise (hemangiomas) is strongly recognized, the laminated coherent spherical pigment of the present invention has a transmitted light wavelength of around 550 nm. It is preferable to adopt a material capable of obtaining a reflection peak in (green).

The mechanism for exhibiting the effect of concealing color tone troubles by the laminated interference spherical pigment of the present invention is as described above.
By appropriately selecting and adopting the multi-layered interference spherical pigment, in addition to obtaining transmitted light having a complementary color relationship with the color for which skin tone trouble is recognized, when white light is incident, The color tone of the reflected light obtained according to the particle size of the pigment is also involved in the color tone.

That is, in the present invention, spot-like color tone troubles of the skin, that is, partial unevenness of the skin color in the yellow-red system or partial unevenness of the skin color in the blue-green system. The sex can be visually assimilated and made inconspicuous by diffuse reflection light having a similar color tone.

Further, as described above, the spot-like effect is not exhibited, and a yellow-red color tone trouble (dullness, reddish face, etc.) over a wide range of the skin is recognized, that is,
As long as the scattered light is in the wavelength range of 580 to 700 nm (yellow-red) and the color tone trouble having a wide range of broad reflection peaks is eliminated, the transmitted light as the laminated coherent spherical pigment of the present invention is Wavelength 475-550nm (blue-
It is preferable to adopt a material capable of having a reflection peak in (green).

Further, in this case, the wavelength of the transmitted light (and the reflected light) selected and adopted by the theory of the action mechanism of the complementary color relation described above causes a slight deviation. When eliminating the problem, the transmitted light (and reflected light) that is selected and adopted for the color tone trouble is set to the long wavelength side, and when the "reddish face" is eliminated, the transmitted light that is selected and adopted for the color tone trouble. (And, by setting the laminated interference pigment so that the reflected light is shifted to the short wavelength side, the color tone trouble is more effectively eliminated (in the expression of the effect related to the improvement of the color tone trouble over a wide range of skin). Is, the color tone of the reflected light may be dominant).

The present invention also relates to a laminated interference spherical pigment having a core-shell structure, which comprises at least three or more alternating layers of a metal oxide having a low refractive index and a metal oxide having a high refractive index. (Hereinafter, this invention is referred to as "second invention".
Say. ) Is provided. The present invention (second invention)
The laminated interference spherical pigment of No. 1 has the same constitution as the above-mentioned first except that the constitutional requirements are that the alternating layers are at least three layers or more, and that the monodisperse spherical particles are not constitutional requirements. It is similar to the invention. Therefore, with respect to points not particularly detailed in the section of the present invention,
The matters described in the section of the invention are appropriately applied.

The second invention will be described in detail below. Since the laminated interference spherical pigment of the present invention (the second invention) has the above-mentioned constitution, it exhibits good slipperiness and interference especially when applied to cosmetics. It produces strong coloration, morphological trouble improving effect, color tone trouble improving effect, and further an effect that a natural finish can be obtained.

The core-shell structure of the present invention has a laminated structure of three or more layers consisting of a core portion and a plurality of shell portions. Such a laminated structure of three or more layers can develop color effectively by light of an arbitrary wavelength.

The laminated interfering spherical pigment of the present invention is not particularly limited to its particle size distribution, and it is possible to use monodisperse spherical particles having a narrow particle size distribution, which is also a normal distribution.
It is also possible to use spherical particles having a wide distribution width. In terms of the effect of light interference, the monodisperse spherical particles are preferable from the viewpoint that the effect of enhancing the color development of the interference light and sufficiently improving the color tone trouble is further exhibited by the retroreflection. Further, since the laminated interference spherical pigment of the present invention is preferably monodisperse particles as described above, the core portion, which is the core material thereof, is also monodisperse particles, particularly those having a uniform particle diameter. Is preferred.

For the same reason as in the first invention, the laminated interference spherical pigment of the present invention preferably has a coefficient of variation in particle diameter of 10% or less, more preferably 5% or less, and , The volume average particle diameter is 0.15 to 2.0 μ
It is preferably m.

[Cosmetic] Next, the cosmetic of the present invention will be described in detail based on preferred embodiments thereof. The cosmetic of the present invention contains the above-mentioned laminated interference spherical pigment. Therefore, for the details of the laminated interference spherical pigment contained in the cosmetic of the present invention, the matters described in the section of the above "laminated interference spherical pigment of the present invention" are appropriately applied.

In the cosmetic of the present invention, for the purpose of improving the above-mentioned color tone trouble, in order to obtain a desired color tone (transmitted light and reflected light), a single type of the laminated interference spherical pigment is used. It is also possible to use them in combination with each other.

In the cosmetic of the present invention, the above-mentioned laminated interference spherical pigment is compounded by the same method as the conventional compounding method of powder for cosmetics.

The content of the laminated interference spherical pigment in the cosmetic of the present invention is appropriately determined depending on the dosage form and form of the cosmetic, and further the purpose of incorporating the laminated interference spherical pigment into the cosmetic. The amount can be selected and is not particularly limited, but is usually 0.2% by weight or more, preferably 10% by weight or more with respect to the cosmetic. Here, if the content of the multilayer interference spherical pigment is less than 0.2% by weight in the cosmetic of the present invention, the visual effect of the present invention may not be obtained.

When the cosmetic composition of the present invention is used as a cosmetic composition for makeup finish or a cosmetic composition for remake, it is possible to compose the cosmetic composition with 100% by weight of the laminated interference spherical pigment.

In particular, when the effect of improving the yellow-red color tone trouble is desired, the cosmetic of the present invention has a maximum reflection peak (blue-blue) at a transmitted light wavelength of 400 to 550 nm.
It is preferable not to add a laminated interference spherical pigment other than the laminated interference spherical pigment having green). That is, yellow-
When the effect of improving the reddish color tone is desired, when the maximum reflection peak of the transmitted light described above is in the yellow-reddish color, there is a risk that the expression of the effect of the present invention may be hindered. There is a risk that red color tone problems will be noticeable.

Further, when the effect of improving blue-green color tone trouble is desired, the cosmetic of the present invention has a maximum reflection peak (yellow-red) of transmitted light at a wavelength of 550 to 750 nm. It is preferable not to add a laminated interference spherical pigment other than the laminated interference spherical pigment having That is, when the effect of improving blue-green color tone trouble is desired, when the maximum reflection peak of the transmitted light described above is in the blue-green system, there is a possibility that the expression of the effect of the present invention is hindered, and further, There is a risk that the blue-green color tone problem of the skin may be noticeable.

In addition to the above-mentioned laminated interference spherical pigment, various powders used in ordinary cosmetics can be blended in the cosmetic of the present invention. Examples of such powder include magnesium silicate, kaolin, clay, bentonite, red iron oxide, titanium-coated mica, bismuth oxychloride, zirconium oxide, magnesium oxide, zinc oxide,
Titanium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, iron oxide, ultramarine blue, chromium oxide, chromium hydroxide, calamine and carbon black and inorganic powders such as composites thereof, polyamide, Polyester, polypropylene, polystyrene, polyurethane, vinyl resin, urea resin, phenol resin, fluororesin, silicone resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, divinylbenzene-styrene copolymer, silk powder, cellulose and these Examples thereof include organic powders such as composites, and those obtained by surface-treating these with a surfactant, silicone, metallic soap, lecithin, amino acid, collagen, polymer, fluorine compound and the like.

Further, in the cosmetic of the present invention, in addition to the above-mentioned components, components used in ordinary cosmetics, for example, petrolatum, lanolin, ceresin, microcrystalline wax, carnauba wax, candelilla wax, higher fatty acids, higher alcohols. Liquid oil such as solid / semi-solid oil such as squalane, liquid paraffin, ester oil, diglyceride, triglyceride, silicone oil, fluorinated oil such as perfluoropolyether, perfluorodecalin, perfluorooctane, water-soluble and oil-soluble Polymer, water,
Inorganic and organic pigments, metallic soap-treated or silicone-treated inorganic and organic pigments, coloring agents such as organic dyes, surfactants, ethanol, preservatives, antioxidants, pigments, thickeners,
A pH adjusting agent, a fragrance, an ultraviolet absorber, a moisturizing agent, a blood circulation promoting agent, a cooling sensation agent, an antiperspirant, a bactericidal agent, a skin activating agent and the like can be appropriately added within a range that does not impair the effects of the present invention.

The cosmetics of the present invention are emulsified base cosmetics, powder foundation, base makeup cosmetics such as face powder, powder lips, cheek color,
It can be applied mainly to point makeup cosmetics such as eye color shadow, mascara, eyeliner, and eyebrow, as well as other cosmetics of various dosage forms.

[0061]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.
In addition, unless otherwise specified, the compounding ratio is part by weight.

Production Example 1 [ Production of Laminated Interfering Spherical Pigment (1)] Commercially available monodisperse spherical silica (volume average particle diameter 0.3 μm,
A refractive index of 1.46) was suspended in deionized water and the suspension was heated to about 75 ° C. Further, an aqueous titanium tetrachloride solution was measured and dropped into this suspension. During the dropping, the pH was kept constant at 2.2 with an aqueous sodium hydroxide solution. After completion of the dropping, heating and stirring were performed at the same temperature to precipitate the powder. At this time, the charged amount of titanium tetrachloride was adjusted so that titanium dioxide was 89 parts with respect to 11 parts of monodisperse spherical silica.
After the precipitated powder is filtered and washed, the powder is heated to 250 ° C.
And dried at 900 ° C. for 3.5 hours. As a result, a two-layer type monodisperse spherical powder in which the core portion to be the first layer was silica and the shell portion to be the second layer was titanium dioxide was obtained.

Subsequently, the two-layer type monodisperse spherical powder obtained above was dispersed in an aqueous sodium hydroxide solution, and a sodium silicate solution was measured and dropped into this dispersion. At this time, the pH of the aqueous solution was kept constant at a pH of more than 7.5 with hydrochloric acid.
After completion of the dropping, heating and stirring were performed at the same temperature to precipitate the powder. At this time, the charged amount of sodium silicate was adjusted so that silica was 64 parts with respect to 36 parts of the two-layer type monodisperse spherical powder. After the precipitated powder was filtered and washed, this powder was dried at 250 ° C. for 12 hours and subsequently calcined at 750 ° C. for 3.5 hours. As a result, a multilayer interference pigment (1) (monodisperse spherical particles) in which the first layer is silica, the second layer is titanium dioxide, and the third layer is silica Obtained.

From the quantification result, the obtained multilayer interference spherical pigment (1) was found to have 4 parts of silica in the core portion as the first layer, 32 parts of titanium dioxide in the shell portion as the second layer, and the third layer. It was found that the amount of silica in the shell part was 63 parts. It was also found that the laminated interference spherical pigment (1) had a volume average particle diameter of 0.85 μm and a coefficient of variation of 5%. When the laminated interference spherical pigment (1) was applied on black artificial leather, strong red interference light was observed.

Production Example 2 [ Production of Multilayer Interfering Spherical Pigment (2)] Monodisperse spherical titanium oxide (volume average particle diameter 0.36 μm,
The refractive index 2.3) was dispersed in an aqueous sodium hydroxide solution, and a sodium silicate solution was measured and dropped into this dispersion. At this time, the pH of the aqueous solution was kept constant at a pH of more than 7.5 with hydrochloric acid. After completion of the dropping, heating and stirring were performed at the same temperature to precipitate the powder. At this time, the charged amount of sodium silicate was adjusted so that silica was 92 parts with respect to titanium oxide 8 parts. After filtering and washing the precipitated powder, the powder is dried at 250 ° C. for 12 hours, and then 900
Baking at 3.5 ° C. for 3.5 hours. As a result, a multilayer interference spherical pigment (2) (monodisperse spherical particles) in which the core portion to be the first layer was titanium dioxide and the shell portion to be the second layer was silica was obtained.

The obtained laminated interference spherical pigment (2) was found to have 8% titanium dioxide in the core portion as the first layer based on the quantitative results.
It was found that the silica in the shell part, which is the second layer, is 92 parts. Further, it was found that the laminated interference spherical pigment (2) had a volume average particle diameter of 1.0 μm and a coefficient of variation of 8%. When the laminated interference type spherical pigment (2) of the present invention was applied onto black artificial leather, strong blue interference light was observed.

Production Example 3 [ Production of Laminated Interfering Spherical Pigment (3)] Monodisperse spherical titanium oxide (volume average particle diameter 0.30 μm,
The refractive index 2.3) was dispersed in an aqueous sodium hydroxide solution, and a sodium silicate solution was measured and dropped into this dispersion. At this time, the pH of the aqueous solution was kept constant at a pH of more than 7.5 with hydrochloric acid. After completion of the dropping, heating and stirring were performed at the same temperature to precipitate the powder. At this time, the charged amount of sodium silicate was adjusted so that silica was 94.5 parts with respect to titanium oxide of 5.5 parts. After filtering and washing the precipitated powder, the powder is dried at 250 ° C. for 12 hours, followed by
Baking was performed at 900 ° C. for 3.5 hours. As a result, a multilayer interference pigment (3) (monodisperse spherical particles) in which the first layer has a core portion of titanium dioxide and the second layer has a shell portion of silica
Got

The obtained laminated interference spherical pigment (3) was found to have 5% titanium dioxide in the core layer as the first layer, based on the quantitative results.
Part, the shell part forming the second layer was found to be 95 parts silica. Further, it was found that the laminated interference spherical pigment (3) had a volume average particle diameter of 1.0 μm and a coefficient of variation of 10%. When the laminated interference spherical pigment (3) was applied on black artificial leather, extremely strong green interference light was observed.

The resulting laminated interference spherical pigment (1),
An example of using (2) and (3) in a cosmetic is shown below.

Powder Foundation Examples 1, 2 and Comparative Examples 1, 2, 3 The powder component (A) shown in Table 1 was mixed in a Henschel mixer, and at the same time, the oil component (B) separately heated and mixed was added. did. Further, these were thoroughly mixed and press-molded to obtain a powder foundation.

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[Table 1]

Face Powder Examples 3 and 4, Comparative Examples 4, 5 and 6 The powder component (A) shown in Table 2 was mixed in a Henschel mixer, and at the same time, the oil component (B) separately heated and mixed was added. did. Further, these were thoroughly mixed to obtain a face powder.

[0073]

[Table 2]

Evaluation Method With respect to the powder foundation and face powder obtained in Examples 1 to 4 and Comparative Examples 1 to 6, the effect of application and the feeling of finish were evaluated by 5 expert panelists. The evaluation was performed by the following five-level evaluation, and the average value was symbolized and shown. The results of sensory evaluation of the powder foundation are shown in Tables 3 and 4, and the results of sensory evaluation of the face powder are shown in Tables 5 and 6, respectively.

[0075] 1: Very bad 2: Somewhat bad 3: Normal 4: Somewhat good 5: Very good

Average value 1 or more and less than 2: x 2 or more and less than 3: △ 3 or more and less than 4: ○ 4 or more and 5 or less: ◎

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[Table 3]

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[Table 4]

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[Table 5]

[0080]

[Table 6]

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EFFECTS OF THE INVENTION According to the laminated interference spherical pigment of the present invention, it is excellent in usability such as slipperiness, especially when it is contained in cosmetics (the ball bearing effect due to having a spherical shape is exhibited. ), Color development due to interference of light of any wavelength (light interference effect, that is, effect of wavelength selectivity of reflected light is expressed), hiding morphological problems such as wrinkles, pores, and rough texture of skin (having a spherical shape (Due to the light diffusion effect caused by), at the same time, nevus, hemangiomas, red face, spots,
Color tone troubles such as freckles and dullness can be hidden (the effect of wavelength selectivity of transmitted light is exhibited), and a natural finish can be obtained. Further, according to the present invention, a cosmetic having the above-mentioned excellent effects is provided by containing the above-mentioned laminated interference spherical pigment.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C09C 3/06 C09C 3/06 // C01B 33/12 C01B 33/12 Z F term (reference) 4C083 AB171 AB172 AB232 AB241 AB242 AB432 AC072 AC352 AC482 AD152 BB25 BB26 BB51 CC01 CC12 DD17 DD21 EE06 EE07 EE11 FF01 FF05 FF06 4G072 AA41 BB07 GG02 HH14 JJ26 QQ09 UU30 4J037 AA08 AA15 AA18 A14EE04 EE20 CA22EE04 CA25EE05 EE25

Claims (6)

[Claims] 1. A laminated type, comprising alternating layers of a metal oxide having a low refractive index and a metal oxide having a high refractive index, having a core-shell structure, and being monodisperse spherical particles. Interfering spherical pigment. 2. A laminated coherent sphere, comprising at least three or more alternating layers of a metal oxide having a low refractive index and a metal oxide having a high refractive index, and having a core-shell structure. Pigments. 3. The multilayer interference pigment according to claim 2, wherein the multilayer interference spherical pigment is monodisperse spherical particles. 4. The multi-layer coherent spherical pigment according to claim 1, wherein the multi-layer coherent spherical pigment is a monodisperse spherical particle having a volume average particle diameter of 0.15 to 2.0 μm. Spherical pigment. 5. The laminated interference according to claim 1, wherein the metal oxide having the low refractive index is silica, and the metal oxide having the high refractive index is titanium dioxide. Spherical pigment. 6. A cosmetic comprising the laminated interference spherical pigment according to claim 1. Description: