Photovolatile pigment having a film containing zirconium oxide

Abstract

In consideration of the diversification of required properties, the present disclosure improves a bright pigment from a viewpoint other than vividness and intensity of coloring. The present disclosure provides a bright pigment comprising a flake-like base and a coating film that is on the flake-like base and that contains zirconium oxide, wherein the mean deviation (MMD) of mean frictional coefficient is not more than 1.5. Also provided is a bright pigment comprising a flake-like base and a coating film that is on the flake-like base and that contains zirconium oxide, wherein specific surface area is not less than 0.5 cm2 / g.

Description

Technical Field

[0001] The present invention relates to a bright pigment, particularly a bright pigment having a film on its surface.

Background Art

[0002] Bright pigments may be added to compositions where appearance is important, such as paints, inks, and cosmetics. When a bright pigment exhibits a nacreous luster, it is also called a nacreous pigment, a pearl pigment, etc. Generally, a bright pigment includes a flaky substrate such as glass or mica, and a film formed on the substrate. As the film, a film containing titanium oxide is usually used. In order to develop more vivid colors, it has also been proposed to attach metal fine particles typified by gold fine particles to the surface of the flaky substrate or the metal oxide film (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventionally, bright pigments have been developed with an emphasis on strong brilliance and vivid color. However, as the applications expand, the required characteristics of bright pigments are diversifying. The present invention aims to improve bright pigments from a perspective different from the intensity and vividness of color development.

Means for Solving the Problems

[0005] According to one aspect of the present invention, it includes a flaky substrate and a film containing zirconium oxide on the flaky substrate, and provides a bright pigment having an average deviation of the average coefficient of friction (MMD) of 1.5 or less.

[0006] From another aspect of the present invention, a flaky substrate and a film containing zirconium oxide on the flaky substrate are provided, a brilliant pigment having a specific surface area of 0.5 cm 2 / g or more is provided.

[0007] From yet another aspect of the present invention, a pigment-containing composition containing the brilliant pigment according to the present invention is provided, From still another aspect of the present invention, a coated body including a substrate and a coating film on the substrate is provided, wherein the coating film contains the brilliant pigment according to the present invention.

[0008] From yet another aspect of the present invention, a method for producing a brilliant pigment, wherein the brilliant pigment includes a flaky substrate and a film containing zirconium oxide on the flaky substrate, contacting a liquid containing a tin-containing salt with the surface of the flaky substrate, and forming a film containing zirconium oxide on the surface contacted with the liquid by a liquid phase film formation method, is provided.

Advantages of the Invention

[0009] The brilliant pigment according to the present invention may have characteristics different from those of conventional brilliant pigments. This characteristic is, for example, the smoothness given to the skin, and also, for example, a color that is not too strong, such as silver, or a color ranging from yellow to orange, or red or other colors.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Modes for Carrying Out the Invention

[0011] Embodiments of the present invention will be described below, but the following description is not intended to limit the present invention to specific embodiments.

[0012] In this specification, "main component" means the component with the highest content rate. MMD is an abbreviation for mean deviation of mean friction coefficient (MIU; mean friction coefficient). MMD is an index corresponding to the smoothness of skin feel. The lower the MMD, the better the smoothness of the feel. Details of the method for measuring MMD will be described in the Examples section.

[0013] The bright pigment of the present embodiment includes a flaky substrate and a film containing zirconium oxide on the flaky substrate (zirconium oxide-containing film). The bright pigment has at least one, preferably both, of the following characteristics. 1) The MMD of the bright pigment is 1.5 or less 2) The specific surface area of the bright pigment is 0.5 cm 2 / g or more

[0014] Titanium oxide is known as a film-forming material that can achieve vivid color development due to its high refractive index. However, there is room for considering alternative materials, at least in terms of improving the tactile sensation given to the skin. As a result of studying various materials, the inventor has found that zirconium oxide is suitable for achieving a low MMD. The preferred MMD of the bright pigment is 1.0 or less, 0.8 or less, more preferably 0.6 or less, and particularly 0.5 or less. The lower limit of MMD is not particularly limited, but is, for example, 0.01 or more.

[0015] MMD is also affected by the type of flaky substrate. For example, when the flaky substrate is mica, synthetic mica, flaky alumina, sericite, flaky titania, or flaky iron oxide, it is generally difficult to achieve a low MMD. However, according to this embodiment, even when using these flaky substrates, an MMD of 1.5 or less, for example, exceeding 1.0 and 1.5 or less can be achieved. On the other hand, when the flaky substrate is flaky glass or flaky silica, according to this embodiment, it is possible to achieve an MMD in the range described above (for example, 0.6 or less) that is 1.0 or less and even lower than this.

[0016] The glitter pigment according to this embodiment can have an MIU of, for example, 2.1 or less, preferably 2.0 or less, more preferably 1.5 or less, and in some cases 1.0 or less. The lower limit of MIU is not particularly limited, but is, for example, 0.01 or more.

[0017] The formation of the coating on the flaky substrate is generally carried out by a liquid phase film formation method. In order to obtain a zirconium oxide-containing film with a sufficiently low MMD, it is desirable to perform a pretreatment on the surface on which zirconium oxide is to be deposited. An example of the pretreatment is a contact treatment of the surface with a liquid containing a tin-containing salt.

[0018] It has been found that the pretreatment with a liquid containing a tin-containing salt increases the specific surface area of the glitter pigment. The increase in the specific surface area can be a factor contributing to the improvement of the touch and other properties affected by the specific surface area. The preferable range of the specific surface area is 0.8 cm 2 / g or more, 1.0 cm 2 / g or more, 2.0 cm 2 / g or more, 2.5 cm 2 / g or more, 3.0 cm 2 / g or more, 3.5 cm 2 / g or more, 4.0 cm 2 / g or more. The specific surface area may be 4.5 cm 2 / g or more. The upper limit of the specific surface area is not particularly limited, but is, for example, 100.0 cm 2 / g or less, 50.0 cm 2 / g or less, 20.0 cm2 / g or less, and 18.0 cm 2 / g or less, in some cases 15.0 cm 2 / g or less.

[0019] Although the sense of brilliance imparted by the zirconium oxide-containing film is somewhat modest, it has been found that in makeup cosmetics such as foundations, it can actually be a factor in imparting a high sense of transparency. * a * b * Based on the color system, L is between 30 and 70, and more preferably between 35 and 68, and especially between 40 and 65. * The titanium oxide-containing film may have the above L * is usually more than 70. Furthermore, if the film thickness is appropriately adjusted, the zirconium oxide-containing film can achieve the color development desired for makeup cosmetics, specifically, colors ranging from silver to yellow, orange, red, and even purple. The method for measuring the reflected color will be explained in the Examples section.

[0020] Zirconium oxide-containing films are inferior to titanium oxide-containing films in terms of imparting strong brilliance and color development. However, zirconium oxide-containing films are superior to titanium oxide-containing films in terms of preventing complementary colors that are sometimes prominently observed in titanium oxide-containing films. When complementary colors are prominently observed, the color developed by the luster pigment may be observed to be somewhat dull. Complementary colors are likely to cause problems when a large amount of luster pigment is added.

[0021] The flake-like substrate and coating that constitute the bright pigment will be described below. (Flake-like substrate) The flaky substrate is a minute plate-like flake, also called a scaly substrate or the like. The flaky substrate is, for example, at least one selected from the group consisting of flaky glass, flaky alumina, flaky graphite, flaky iron oxide, flaky titania, flaky silica, bismuth oxychloride, mica, talc, and sericite. The flaky substrate is preferably flaky glass, flaky alumina, or mica. Mica may be natural mica or synthetic mica. Hereinafter, flaky glass, which is a particularly preferred flaky substrate, will be described.

[0022] The glass composition constituting the flaky glass may further contain a metal oxide other than silicon oxide together with silicon oxide. Specifically, it may contain at least one selected from the group consisting of aluminum oxide, calcium oxide, and sodium oxide together with silicon oxide. In the glass composition, silicon oxide may be the main component. The content rate of silicon oxide in the glass composition is not particularly limited. For example, it may be 40 mass% or more, 45 mass% or more, and may be 75 mass% or less. The glass composition may have a transmittance exceeding 60%, and further 70%, over a wavelength range of 400 to 800 nm when converted to a thickness of 100 μm. Specifically, the glass composition may correspond to at least one selected from the group consisting of soda-lime glass, A glass, C glass, E glass, borosilicate glass, and aluminosilicate glass. The flaky glass constituted by these multi-component glass compositions is suitable for being manufactured by a melting method with excellent mass productivity.

[0023] The preferred average particle size of the flaky glass is 1 to 180 μm, 3 to 120 μm, and in some cases 5 to 100 μm. The average particle size of the flaky glass is determined by the particle size (D50) corresponding to 50% of the volume accumulation from the smaller particle size side in the particle size distribution of the light scattering equivalent diameter measured by the laser diffraction method. The preferred thickness of the flaky glass is 0.1 to 10 μm, more preferably 0.2 to 5 μm, and particularly preferably 0.25 to 2 μm. If the average particle size and thickness are too large, it becomes difficult to obtain a light volatile pigment having a sufficiently good touch. However, regarding the thickness, an extremely good touch may be obtained from flaky glass with a thickness of 1 to 3 μm. These numerical ranges are also the preferred average particle size and thickness of flaky substrates other than flaky glass.

[0024] The flaky glass can be produced, for example, by the blow method. The blow method is a method in which a raw material cullet is melted, the molten glass is continuously taken out from a circular slit, and at this time, a gas such as air is blown from a blow nozzle provided inside the circular slit to expand the molten glass into a balloon shape, and the expanded and thinned glass is pulverized into a flaky (scaly) shape. As the flaky glass, for example, commercially available products sold as the Glass Flake (registered trademark) series by Nippon Sheet Glass Co., Ltd. can be used.

[0025] The surface of the flaky glass is superior in smoothness compared to crystalline grains such as mica. For this reason, the flaky glass is particularly suitable for realizing a sufficiently low MMD.

[0026] In a preferred embodiment, the glitter pigment comprises flaky glass and a single-layer zirconium oxide-containing film formed directly on its surface. However, a primer film may be formed on the surface of the flaky substrate. In this case, the film containing zirconium oxide is formed on the surface of the primer film. The primer film may be a single layer or a multilayer. The primer film may be a film containing an oxide.

[0027] (Zirconium oxide-containing film) The zirconium oxide-containing film contains at least zirconium oxide. The zirconium oxide-containing film may have zirconium oxide as the main component. The preferred film thickness of the zirconium oxide-containing film is 40 to 160 nm, more preferably 50 to 140 nm, particularly 70 to 120 nm, and in some cases 90 to 110 nm. The color development by the zirconium oxide-containing film can be appropriately adjusted by controlling the film thickness. Generally, as the film thickness increases, the color changes from silver to yellow, orange, red, and purple. In a preferred embodiment, the surface of the zirconium oxide-containing film is exposed.

[0028] Considering the use in makeup cosmetics, the film thickness of the zirconium oxide-containing film is preferably 50 to 140 nm, from which color development from silver to red via yellow and orange is easily obtained. Considering the use in foundation, the film thickness of the zirconium oxide-containing film is preferably 50 to 120 nm, from which color development from silver to orange via yellow is easily obtained. However, in makeup cosmetics other than foundation, color development from red to purple, which is easily obtained from a film thickness in the range exceeding 120 nm and not exceeding 160 nm, may be useful.

[0029] For forming a zirconium oxide-containing film on a flaky substrate, a liquid-phase film-forming method is suitable. This liquid-phase film-forming method is usually carried out by dispersing a flaky substrate in a liquid containing a zirconium-containing salt and stirring this liquid. The liquid may be an aqueous solution in which a zirconium-containing salt is dissolved. The zirconium-containing salt is, for example, zirconium sulfate, zirconium oxychloride, or ammonium zirconium carbonate. If necessary, a pH adjuster such as an acid may be added to the liquid. The pH can be adjusted, for example, to the range of 1.9 to 4.0, and further to 2.0 to 3.5.

[0030] As described above, by the pretreatment using a liquid containing a tin-containing salt, it becomes easy to obtain a sufficiently low MMD from the zirconium oxide-containing film. Although the mechanism of the MMD reduction by this pretreatment is not clear at present, the surface and density of the generated zirconium oxide may be affected, and as a result, the MMD may be reduced. The liquid containing a tin-containing salt may be an aqueous solution in which the tin-containing salt is dissolved. The tin-containing salt is, for example, tin chloride, more specifically, tin(II) chloride, tin(IV) chloride, tin(II) chloride dihydrate, or tin(IV) chloride pentahydrate.

[0031] Hereinafter, a composition and a coated body containing a fluorescent pigment will be described. (Composition and Coated Body) The pigment-containing composition of the present embodiment contains the fluorescent pigment of the present embodiment. Examples of the composition include at least one selected from paints, inks, cosmetics, and resin compositions. Examples of the resin composition include artificial marble molded products. The coated body of the present embodiment includes a substrate and a coating film thereon, and the coating film contains the fluorescent pigment of the present embodiment. Examples of the coated body include coated paper. However, the substrate is not limited to paper and may be metal, resin, ceramics, or others. The coating film may contain the pigment-containing composition according to the present invention.

[0032] The characteristics of the fluorescent pigment of the present embodiment are easily recognized as advantages when the pigment is used as a cosmetic. The cosmetics are not particularly limited and may be, for example, basic cosmetics such as creams, hair care cosmetics such as hair styling agents, body care products such as body creams, body powders, antiperspirants, sunscreen agents, and bath agents. Preferably, they are makeup cosmetics such as foundations, mascaras, eyeshadows, eyeliners, lipsticks, glosses, blushes, and nail polishes. The makeup cosmetics may be point makeup cosmetics such as lipsticks and blushes, or base makeup cosmetics such as concealers, foundations, and finishing powders.

[0033] The form of the cosmetic is not particularly limited, and examples thereof include powders, sticks, pencils, creams, emulsions, dispersions, oils, tablets, capsules, liners, paints, gels, and others. For example, foundations can be of any of the cake type, powder type, cream type, or liquid type. The cosmetic can contain components that have been conventionally used as components other than the glitter pigment. The components other than the glitter pigment are appropriately selected according to the type of the cosmetic. The cosmetic may contain pigments other than the glitter pigment.

[0034] For example, foundations are formulated with extender pigments, coloring pigments, white pigments, nacreous pigments, etc. Extender pigments are used to impart spreading property, adhesiveness, and further gloss, and are also used as extenders. Coloring pigments are used to impart basic color tones. White pigments are used to impart hiding power and whiteness. Nacreous pigments are used to give nacreous luster (pearl effect). The blending amount of the nacreous pigment that only needs to impart gloss locally to the foundation is at most about 8% by mass of the total amount of the foundation. On the other hand, the extender pigment is a basic component that forms the framework of the foundation, and is usually blended in a larger amount than the above to adjust the properties of the whole foundation.

[0035] The cosmetic may contain a small amount of the glitter pigment of the present embodiment, in other words, an amount such that the glitter pigment functions as a nacreous pigment, or may contain a substantial amount, in other words, an amount such that the glitter pigment functions substantially as an extender pigment or a pigment similar thereto. In the latter case, the content of the glitter pigment with respect to the total amount of the cosmetic may be, for example, 10% by mass or more, particularly 12 to 30% by mass.

[0036] Hereinafter, specific examples of the present invention will be described by way of examples, but the following examples are not presented with the intention of limiting the present invention. The properties of the light-emitting pigment were evaluated as follows.

[0037] (Touch feeling; MIU and MMD) MIU corresponding to slipperiness and MMD corresponding to smoothness were measured using the friction sensation tester "KES-SE" manufactured by Kato Tech Co., Ltd. A 10 mm square silicone element was used as the friction element, and the measurement conditions were a static load of 50 g and a measurement speed of 1 mm / second. The sample to be measured was prepared by uniformly spraying a fluorescent pigment on black artificial leather ("Protein Leather (registered trademark) Supplier" manufactured by Idea Tex Japan Co., Ltd.) so that the mass per unit area was 1.3 mg / cm 2 Note that the relative humidity during the measurement was 54%.

[0038] (Reflected light; luminance and color) The luminance L of the reflected light * was measured using a colorimeter "CR-400" manufactured by Konica Minolta Inc. The sample to be measured was prepared by applying a composition in which a fluorescent pigment was added and mixed at 10% by mass to a transparent acrylic resin ("Nippe Acryl 'Auto Clear Super' manufactured by Nippon Paint Co., Ltd.) on a white / black ground hiding rate measurement paper. The composition was applied so that the thickness of the coating film was 9 mil (about 228.6 μm), but the thickness of the dried coating film was 70 to 80 μm. The light source used was a D65 light source, and the measurement surface was the black-coated surface. The measured reflected light was vertical reflected light. The measured reflected light was observed using the CIE 2° field metamerism function.

[0039] (Film thickness, substrate thickness) The film thickness of the coating and the thickness of the substrate were measured by observing the cross section of the fluorescent pigment using a scanning electron microscope (SEM).

[0040] (Average particle diameter D50) The average particle diameter of the flaky substrate was measured by dispersing the flaky substrate to be measured in water and measuring the volume cumulative 50% equivalent diameter (D50) with "MT3300" manufactured by Microtrac Co., Ltd.

[0041] (Specific surface area) The BET specific surface area was measured by the nitrogen gas method using "NOVA4200e" manufactured by Quantachrome Instruments Co., Ltd.

[0042] (Sample 1) · Pretreatment of Flaky Substrate As the flaky substrate, flaky glass with an average particle size (D50) of 80 μm and a thickness of 1.3 μm was used. The flaky glass used in this example and the subsequent examples is all Glass Flake (registered trademark) manufactured by Nippon Sheet Glass Co., Ltd. and is composed of multi-component glass. This multi-component glass contains SiO2, Al2O3, MgO, and CaO, and further contains an alkali component (at least one selected from Li2O, Na2O, and K2O). First, 150 g of the flaky substrate was mixed with 1.5 L of water and stirred. Then, hydrochloric acid was added thereto to adjust the pH to 1.45 - 1.55. Subsequently, 9.06 mL of an aqueous solution of tin(IV) chloride with a concentration of 1.3 mass% was added thereto. Thereafter, stirring was continued, and the powder and the liquid were separated by filtration. The separated powder was dispersed in water and filtered again to obtain a pretreated flaky substrate.

[0043] · Formation of Zirconium Oxide - Containing Film 150 g of the pretreated flaky substrate and 1.5 L of water were mixed and heated to 75 ± 3°C. Then, hydrochloric acid and sodium hydroxide were added thereto to adjust the pH to 2.0 - 3.5. Subsequently, an aqueous solution of zirconium sulfate with a concentration of 20 mass% and an aqueous solution of sodium hydroxide with a concentration of 10 mass% were simultaneously dropped over 4 hours while maintaining the above pH to coat a zirconia film. Thereafter, the powder and the liquid were separated by filtration. The separated powder was dispersed and stirred in an aqueous solution adjusted to pH 2.0 - 3.5 with hydrochloric acid and then filtered, and this operation was performed twice. Then, the powder was dispersed and stirred in water and then filtered, and this operation was performed twice. Finally, the powder was dried in an atmosphere of 180°C for 12 hours and fired at 600°C for 2 hours. Thus, a flaky substrate with a zirconium oxide - containing film formed on the surface was obtained.

[0044] (Sample 2) A flaky substrate with a zirconium oxide - containing film formed on the surface was obtained in the same manner as in Sample 1, except that flaky glass with an average particle size (D50) of 25 μm and a thickness of 0.5 μm was used as the flaky substrate.

[0045] (Sample 3) A flaky substrate with a zirconium oxide-containing film formed on its surface was obtained in the same manner as Sample 1, except that flaky glass with an average particle size (D50) of 8 μm and a thickness of 0.3 μm was used as the flaky substrate.

[0046] (Sample 4) A flaky substrate with a zirconium oxide-containing film formed on its surface was obtained in the same manner as Sample 1, except that the dropping time of the zirconium sulfate and sodium hydroxide aqueous solutions in the formation process of the zirconium oxide-containing film was set to 3 hours and 30 minutes.

[0047] (Sample 5) A flaky substrate with a zirconium oxide-containing film formed on its surface was obtained in the same manner as Sample 4, except that flaky glass with an average particle size (D50) of 18 μm and a thickness of 1.3 μm was used as the flaky substrate.

[0048] (Sample 6) A flaky substrate with a zirconium oxide-containing film formed on its surface was obtained in the same manner as Sample 4, except that flaky glass with an average particle size (D50) of 8 μm and a thickness of 0.3 μm was used as the flaky substrate.

[0049] (Sample 7) A flaky substrate with a zirconium oxide-containing film formed on its surface was obtained in the same manner as Sample 4, except that flaky glass with an average particle size (D50) of 120 μm and a thickness of 1.3 μm was used as the flaky substrate.

[0050] (Sample 8) A flaky substrate with a zirconium oxide-containing film formed on its surface was obtained in the same manner as Sample 4, except that flaky glass with an average particle size (D50) of 160 μm and a thickness of 1.3 μm was used as the flaky substrate.

[0051] (Sample 9) In the formation process of the zirconium oxide-containing film, a flaky substrate with a zirconium oxide-containing film formed on the surface was obtained in the same manner as Sample 1, except that the dropping time was set to 4 hours and 30 minutes.

[0052] (Sample 10) In the formation process of the zirconium oxide-containing film, a flaky substrate with a zirconium oxide-containing film formed on the surface was obtained in the same manner as Sample 1, except that the dropping time was set to 4 hours and 45 minutes.

[0053] (Sample 11) In the formation process of the zirconium oxide-containing film, a flaky substrate with a zirconium oxide-containing film formed on the surface was obtained in the same manner as Sample 1, except that the dropping time was set to 6 hours.

[0054] (Sample 12) Without performing pretreatment on the flaky substrate, a zirconium oxide-containing film was formed as follows. The flaky substrate used was the same as Sample 1. · Formation of Zirconium Oxide-Containing Film Hydrochloric acid was added to 150 mL of water to adjust the pH to 2.0 - 3.5. 0.5 g of urea and 21 g of zirconium sulfate were sequentially added thereto. Subsequently, 6 g of the flaky substrate was added thereto and further stirred. Then, the powder and the liquid were separated by filtration. Thereafter, the obtained powder was washed with water, dried at 90 °C for 1.5 hours, and further calcined at 800 °C for 1 hour. Thus, a flaky substrate with a zirconium oxide-containing film formed on the surface was obtained.

[0055] (Sample 13) “Meta Shine (registered trademark) MT1080RS” manufactured by Nippon Sheet Glass Co., Ltd. was used.

[0056] (Sample 14) A flaky substrate with a zirconium oxide-containing film formed on the surface was obtained in the same manner as Sample 1, except that synthetic mica manufactured by Nippon Kogaku Kogyo Co., Ltd. with an average particle size (D50) of 10 μm was used as the flaky substrate. The thickness of the synthetic mica was several μm or less.

[0057] (Sample 15) "Timiron Ice Crystal" manufactured by Merck & Co., Inc., in which a titanium oxide-containing film was formed on the surface of synthetic mica, which is a flaky substrate, was used.

[0058] The results of the evaluation are shown in Tables 1 and 2. In Tables 1 and 2, "-" means not measured, and "*" in Table 2 means "a wide range from submicrons to several micrometers".

[0059] [Table 1]

[0060] [Table 2]

[0061] From Tables 1 and 2, it can be understood that the zirconium oxide-containing film is superior to the titanium oxide-containing film in terms of the smoothness imparted by the fluorescent pigment. The improvement in smoothness was remarkable when flaky glass was used as the flaky substrate. Also, it can be understood that the zirconium oxide-containing film is suitable for realizing suppressed luminance compared to the titanium oxide-containing film. It can also be understood that the tin pretreatment of the flaky substrate contributes to the reduction of MMD and the increase in specific surface area.

[0062] Note that the MIU of Samples 1 to 13 was in the range of 0.8 to 3.8. The MIU became 1.5 or less for Samples 1, 4, 9 - 11, in which the D50 of the flaky substrate was 100 μm or less and the thickness was in the range of 1 to 3 μm and which had a zirconium oxide-containing film.

[0063] Using the fluorescent pigments of Samples 4 to 11, 13, and 15, foundations were prepared based on the formulations in Table 3. The foundations were applied to the skin, and their appearance was evaluated based on the following criteria. 4 points: The skin looks naturally bright. There is no glitter. 3 points: The skin looks bright, but there is a little glitter. Point 2: The skin has a slightly unnatural color tone. Point 1: Unnatural glitters can be seen on the skin.

[0064]

Table 3

[0065] The results are shown in Table 4 together with the touch sensations (MIU and MMD) of the pearlescent pigments.

[0066]

Table 4

[0067] In addition, when pearlescent pigments having a titanium oxide-containing film (Samples 13 and 15) were blended into the foundation according to the same formulation as above and the appearance was evaluated, all the results were "Point 1". As a pigment added to adjust the characteristics of the whole foundation, the pearlescent pigment having a zirconium oxide-containing film is superior to the pearlescent pigment having a titanium oxide-containing film.

[0068] The results of observing the flaky substrate formed with the zirconium oxide-containing film using SEM are shown in FIGS. 1 and 2. In the cross-section shown in FIG. 1, a zirconium oxide-containing film with a film thickness of 90 nm is shown. As shown in FIGS. 1 and 2, the zirconium oxide-containing film was densely composed of particles with a size of about several tens of nm.

Claims

1. A glitter pigment comprising flaky glass and a film containing zirconium oxide on the flaky glass, wherein the average particle size of the flaky glass is 180 μm or less, the film thickness of the film is in the range of 40 nm to 160 nm, and the average deviation (MMD) of the average coefficient of friction is 0.6 or less.

2. The glitter pigment according to claim 1, wherein the average deviation (MMD) of the average coefficient of friction is 0.5 or less.

3. The specific surface area is 2.5 cm 2 / g or more, and the fluorescent pigment according to claim 1.

4. The reflected color has an L ＊ a ＊ b ＊ value of 30 or more and less than 70 based on the colorimetric system, ＊ The luminous pigment according to claim 1.

5. The glitter pigment according to claim 1, wherein the film is a single-layer zirconium oxide-containing film directly formed on the surface of the flaky glass.

6. The glitter pigment according to claim 1, wherein the film thickness of the film is 120 nm or less.

7. A pigment-containing composition comprising the glitter pigment according to claim 1.

8. The pigment-containing composition according to claim 7, which is a makeup cosmetic.

9. Comprising a substrate and a coating film on the substrate, wherein the coating film is a coated body containing the glitter pigment according to claim 1.

10. A method for producing a glitter pigment, wherein the glitter pigment is the glitter pigment according to claim 1, comprising flaky glass and a film containing zirconium oxide on the flaky glass, the method comprising contacting a liquid containing a tin-containing salt with the surface of the flaky glass, and forming a film containing zirconium oxide on the surface contacted with the liquid by a liquid phase film forming method.

11. A method for producing a glitter pigment, wherein the glitter pigment comprises flaky glass and a film containing zirconium oxide on the flaky glass, the average particle size of the flaky glass is 180 μm or less, the film thickness of the film is in the range of 40 nm to 160 nm, the specific surface area is 2.5 cm2 / g or more, and the production method comprises contacting a liquid containing a tin-containing salt with the surface of the flaky glass, and forming a film containing zirconium oxide on the surface contacted with the liquid by a liquid phase film forming method.

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