Pearlescent pigment composition having silver interference color and method for producing the same

Abstract

To provide a nacreous pigment having a good silver color and a method for producing the same. 【Solution means】A nacreous pigment composition having a silver interference color containing a plurality of multilayer nacreous pigments, wherein the plurality of multilayer nacreous pigments are multilayer nacreous pigments having three layers of a high refractive index layer (a) of a metal oxide, a low refractive index layer (b) of silica, and a high refractive index layer (c) of a metal oxide on the surface of a flaky substrate, Each multilayer nacreous pigment has an L * value in the range of 57.00 to 79.00, an a * value in the range of -7.00 to 7.70, and a b * in the range of -16.00 to 15.00, but those having an a * value in the range of -4.50 to -1.00 and a b * in the range of -6.00 to -1.00 are substantially not included, The nacreous pigment composition having a silver interference color after mixing the plurality of multilayer nacreous pigments has an L * value in the range of 60.00 to 80.00, an a * value in the range of -4.50 to -1.00, and a b * in the range of -6.00 to -1.00, A nacreous pigment composition having a silver interference color.

Description

[Technical Field]

[0001] This invention relates to a pearlescent pigment composition having silver interference color and a method for producing the same. [Background technology]

[0002] Pearlescent pigments with a silver color are widely used in fields such as cosmetics, plastics, films, paints, and inks. While pearlescent pigments with a silver color, such as those made by coating mica or silica with titanium dioxide, are known, their silver luster is often insufficient, and improvements have been needed. In response to this, a multilayer pearlescent pigment has been developed in which two layers of titanium dioxide with a high refractive index and a low refractive index layer between them are provided on the surface of the substrate, and it has been reported that a pearlescent pigment with high brightness and silver interference color can be obtained (Patent Documents 1 and 2). However, the term "silver interference color" as used here includes cases where the interference color has a slightly pastel hue (Patent Document 2). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2002-195245 [Patent Document 2] Special Publication No. 2013-502468 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, although the aforementioned multilayer pearlescent pigments had high brightness, they produced pastel-toned interference colors at all thickness designs, making it impossible to obtain a good silver interference color, and thus they could not be applied in fields such as paints. Therefore, the object of the present invention is to provide a pearlescent pigment composition that has good silver interference color despite being a multilayer pearlescent pigment, and a method for producing the same.

Means for Solving the Problem

[0005] Therefore, the present inventor has conducted various studies to eliminate the drawbacks of the multilayer nacreous pigment having three layers of a high refractive index layer (a) of metal oxide, a low refractive index layer (b) of silica, and a high refractive index layer (c) of metal oxide on the surface of the flaky substrate. As a result, quite unexpectedly, it has been found that a nacreous pigment composition having a good silver interference color can be obtained by using a combination of two or more of these multilayer nacreous pigments.

[0006] That is, the present invention provides the following [1] to [9]. [1] A nacreous pigment composition having a silver interference color and containing a plurality of multilayer nacreous pigments, wherein the plurality of multilayer nacreous pigments are multilayer nacreous pigments having three layers of a high refractive index layer (a) of metal oxide, a low refractive index layer (b) of silica, and a high refractive index layer (c) of metal oxide on the surface of a flaky substrate, each multilayer nacreous pigment has an L * value in the range of 57.00 to 79.00, an a * value in the range of -7.00 to 7.70, and a b * in the range of -16.00 to 15.00, but substantially does not include those in which the a * value is in the range of -4.50 to -1.00 and the b * is in the range of -6.00 to -1.00, and the nacreous pigment composition having a silver interference color after mixing the plurality of multilayer nacreous pigments has an L * value in the range of 60.00 to 80.00, an a * value in the range of -4.50 to -1.00, and a b * in the range of -6.00 to -1.00, A nacreous pigment composition having a silver interference color. [2] Each of the multilayer nacreous pigments has an L * value in the range of 57.00 to 79.00, an a * value in the range of -7.00 to 7.70, a b * in the range of -16.00 to 15.00, a chroma (C * ) in the range of 4.00 to 17.50, and a hue angle (h) in the range of 80.00 to 350.00, but the a* The value is between -4.50 and -1.00, and b * Values ​​in the range of -6.00 to -1.00 are essentially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00~80.00, a * The value is -4.50 to -1.00, b * The range is -6.00 to -1.00, and the saturation (C * The h-value is in the range of 1.30 to 7.60, and the h-value is in the range of 190.00 to 265.00. [1] A pearlescent pigment composition having the silver interference color described in [1]. [3] A pearlescent pigment composition having a silver interference color according to [1] or [2], wherein the flake-like substrate is mica and the metal oxide is titanium dioxide. [4] A pearlescent pigment composition having a silver interference color according to any one of [1] to [3], wherein the refractive index of the high refractive index layer is n≧1.8 and the refractive index of the low refractive index layer is n<1.8. Cosmetics, plastics, films, paints, or inks containing a pearlescent pigment composition having a silver interference color as described in any of [5][1] to [4]. [6] A method for producing a pearlescent pigment composition having silver interference color containing multiple multilayer pearlescent pigments, The aforementioned multilayer pearlescent pigments are multilayer pearlescent pigments having three layers on the surface of a flake-like substrate: a high refractive index layer of metal oxide (a), a low refractive index layer of silica (b), and a high refractive index layer of metal oxide (c). Each multilayer pearlescent pigment is L * The value is 57.00~79.00, a * The value is between -7.00 and 7.70, and b * The range is -16.00 to 15.00, but a * The value is between -4.50 and -1.00, and b * Values ​​in the range of -6.00 to -1.00 are essentially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00~80.00, a *The value is between -4.50 and -1.00, and b * The range is -6.00 to -1.00. A method for producing a pearlescent pigment composition having silver interference color. [7] Each of the multilayer pearlescent pigments is L * The value is 57.00~79.00, a * The value is -7.00 to 7.70, b * The range is -16.00 to 15.00, and the saturation (C * ) is in the range of 4.00 to 17.50, and the hue angle is in the range of 80.00 to 350.00, a * The value is between -4.50 and -1.00, and b * Values ​​in the range of -6.00 to -1.00 are essentially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00~80.00, a * The value is -4.50 to -1.00, b * The range is -6.00 to -1.00, and the saturation (C * The h-value is in the range of 1.30 to 7.60, and the h-value is in the range of 190.00 to 265.00. [6] A method for producing a pearlescent pigment composition having silver interference color as described in [6]. [8] A method for producing a pearlescent pigment composition having a silver interference color according to [6] or [7], wherein the flake-like substrate is mica and the metal oxide is titanium dioxide. [9] A method for producing a pearlescent pigment composition having a silver interference color according to any one of [6] to [8], wherein the refractive index of the high refractive index layer is n≧1.8 and the refractive index of the low refractive index layer is n<1.8. [Effects of the Invention]

[0007] The pearlescent pigment composition having silver interference color according to the present invention is a pearlescent pigment composition that has a good silver color while having appropriately adjusted saturation, which could not be achieved with raw material multilayer pearlescent pigments, and is applicable to cosmetics, plastics, films, paints, inks, and the like. [Modes for carrying out the invention]

[0008] Terms used herein shall be used in the sense commonly used in the art unless otherwise specified.

[0009] In this specification, pearlescent pigments refer to materials that exhibit properties that create a finish that reflects light specularly, like a metallic surface, resulting in a strong, luminous appearance, or a finish that emits various colors like pearls or rainbows, thus creating a so-called pearlescent effect. They are also called pearl agents or luster agents. Among such pearlescent pigments, those with silver interference colors, i.e., silver interference colors, are used in a wide range of fields, including paints, inks, and cosmetics. As a pearlescent pigment having such silver interference colors, multilayer pearlescent pigments have been developed, in which two or more layers are provided on the surface of the substrate, as mentioned above. The present invention provides a pearlescent pigment composition having a silver interference color, and a method for producing the same, using such a multilayer pearlescent pigment to provide an even better pearlescent pigment composition having a silver interference color.

[0010] One aspect of the present invention is a pearlescent pigment composition having a silver interference color containing a plurality of multilayer pearlescent pigments, The aforementioned multilayer pearlescent pigments are multilayer pearlescent pigments having three layers on the surface of a flake-like substrate: a high refractive index layer of metal oxide (a), a low refractive index layer of silica (b), and a high refractive index layer of metal oxide (c). Each multilayer pearlescent pigment is L * The value is 57.00~79.00, a * The value is between -7.00 and 7.70, and b * The range is -16.00 to 15.00, but a * The value is between -4.50 and -1.00, and b * If the value falls within the range of -6.00 to -1.00, it does not contain any actual oil. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00~80.00, a * The value is between -4.50 and -1.00, and b *The range is -6.00 to -1.00. This is a pearlescent pigment composition having silver interference colors. Another aspect of the present invention is a cosmetic, plastic, film, paint, or ink containing the pearlescent pigment composition having the silver interference color. Another aspect of the present invention is a method for producing a pearlescent pigment composition having a silver interference color containing a plurality of multilayer pearlescent pigments, Each multilayer pearlescent pigment is L * The value is 57.00~79.00, a * The value is between -7.00 and 7.70, and b * The range is -16.00 to 15.00, but a * The value is between -4.50 and -1.00, and b * Values ​​in the range of -6.00 to -1.00 are essentially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00~80.00, a * The value is between -4.50 and -1.00, and b * The range is -6.00 to -1.00. This is a method for producing a pearlescent pigment composition having silver interference color.

[0011] The pearlescent pigment composition having silver interference color according to the present invention contains multiple multilayer pearlescent pigments. The multiple multilayer pearlescent pigments used in the present invention are multilayer pearlescent pigments having three layers on the surface of a flaky substrate: a high refractive index layer of metal oxide (a), a low refractive index layer of silica (b), and a high refractive index layer of metal oxide (c). Examples of flake-like substrates constituting the pearl pigment composition include mica (natural mica, synthetic mica), glass flakes, silica, alumina, polymers, and bismuth oxychloride. However, one or more selected from mica, glass flakes, silica, and alumina are preferred, and mica (including natural mica and synthetic mica) is more preferred. These substrates are preferably in the form of thin flakes, with a particle size of 5 to 100 μm and an aspect ratio of 20 to 200.

[0012] Examples of metal oxides used in the high refractive index layers ((a) and (c)) include titanium dioxide, iron oxide, zirconium dioxide, zinc oxide, tin dioxide, and antimony oxide. However, from the viewpoint of obtaining a good silver interference color, one or more selected from titanium dioxide and iron oxide are preferred, with titanium dioxide being more preferred. From the viewpoint of obtaining a good silver interference color, the refractive index of the high refractive index layers ((a) and (c)) is preferably n ≥ 1.8. The thickness of the high refractive index layers ((a) and (c)) is preferably 40 nm or more and 200 nm or less, respectively.

[0013] From the viewpoint of obtaining a good silver interference color, silica (silicon dioxide) is preferred as the material used for the low refractive index layer (b) provided between the high refractive index layers ((a) and (c)). From the viewpoint of obtaining a good silver interference color, the refractive index of the low refractive index layer (b) is preferably n < 1.8. The thickness of the low refractive index layer (b) is preferably 30 nm or more and 200 nm or less.

[0014] These multilayer pearlescent pigments can be manufactured by providing a high refractive index layer (a) on the surface of a flake-like substrate, then a low refractive index layer (b), and further providing a high refractive index layer (c) on its surface. More specifically, a flake-like substrate is dispersed in water to form a slurry, and an acidic metal chloride and a basic solution are added to precipitate metal oxides, thereby creating a high refractive index layer (a) on the flake-like substrate. Next, a water glass and an acidic solution are added to precipitate silica, thereby creating a low refractive index layer (b). Furthermore, a high refractive index layer (c) is created using the same method as the high refractive index layer (a), thereby obtaining a multilayer pearlescent pigment. The acidic metal chloride used here is a chloride of the metal that constitutes the metal oxide. As the basic solution, alkaline aqueous solutions such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate, and potassium bicarbonate can be used. As the acidic solution, acidic aqueous solutions consisting of inorganic acids such as hydrochloric acid, sulfuric acid, and nitric acid, and organic acids such as organic sulfonic acid and organic carboxylic acid can be used.

[0015] Each of the multilayer pearlescent pigments used in the present invention is L * The value is 57.00~79.00, a * The value is between -7.00 and 7.70, and b * The range is -16.00 to 15.00, but a * The value is between -4.50 and -1.00, and b * It is preferable that those in the range of -6.00 to -1.00 are substantially excluded, and each multilayer pearlescent pigment is L * The value is 56.00~78.00, a * The value is between -7.00 and 7.60, and b * The range is -15.50 to 14.50, but a * The value is between -4.50 and -1.00, and b * It is more preferable that those in the range of -6.00 to -1.00 are substantially excluded, and each multilayer pearlescent pigment is L * The value is 55.00~78.00, a * The value is -6.50 to 7.60, and b * The range is -15.00 to 14.00, but a * The value is between -4.50 and -1.00, and b * It is even more preferable to exclude values ​​that fall within the range of -6.00 to -1.00. Furthermore, each of the aforementioned multilayer pearlescent pigments is L * The value is 57.00~79.00, a * The value is -7.00 to 7.70, b * The range is -16.00 to 15.00, and the saturation (C *) is in the range of 4.00 to 17.50, and the hue angle (h) is in the range of 80.00 to 350.00, but a * value is in the range of -4.50 to -1.00, and b * is preferably substantially free of those in the range of -6.00 to -1.00, and L * value is in the range of 56.00 to 78.00, a * value is in the range of -7.00 to 7.60, b * is in the range of -15.50 to 14.50, chroma (C * ) is in the range of 4.500 to 17.0, and the hue angle (h) is in the range of 82.00 to 348.00, but a * value is in the range of -4.50 to -1.00, and b * is more preferably substantially free of those in the range of -6.00 to -1.00, and L * value is in the range of 55.00 to 78.00, a * value is in the range of -6.50 to 7.60, b * is in the range of -15.00 to 14.00, chroma (C) is in the range of 5.00 to 17.00, and the hue angle (h) is in the range of 84.00 to 345.00, but a * value is in the range of -4.50 to -1.00, and b * is even more preferably substantially free of those in the range of -6.00 to -1.00. Here, being substantially free of means that the corresponding component is not contained at 5% by mass or more, preferably not contained at 1% by mass or more, and more preferably not contained at 0.5% by mass or more. These multilayer pearlescent pigments are not the pearlescent pigments having the silver interference color targeted in the present invention, but are silver-based pearlescent pigments. The color characteristics are L * (lightness), a * (red-green axis), and b * (yellow-blue axis) of the three coordinates of the CIELab color system, and a * and b * of the color coordinates are represented by polar coordinates C * (chroma) and h* (color angle, color locus). In the present invention, a plurality of the multilayer nacreous pigments, that is, two or more kinds thereof are required, preferably two to four kinds, more preferably two or three kinds. Each of the multilayer nacreous pigments does not have the optical properties aimed at in the present invention, but by mixing and using a plurality of them, a composition having the optical properties aimed at in the present invention can be obtained. For example, when one of the multilayer nacreous pigments is mixed with another multilayer nacreous pigment, the values of a * and b * can be adjusted according to the mixing ratio. Utilizing this property, by using a plurality of the multilayer nacreous pigments and adjusting the mixing ratio, a multilayer nacreous pigment having a desired silver interference color can be obtained. Here, the plurality of multilayer nacreous pigments may be multilayer nacreous pigments each manufactured with the same raw material composition, with the L * value, a * , and b * within the above ranges and at least one of them being different, or may be multilayer nacreous pigments each manufactured with different raw material compositions, with the L * value, a * , and b * within the above ranges and at least one of them being different. However, in order to obtain a composition having the desired optical properties, the former is preferred.

[0016] The particle size distribution of the plurality of multilayer nacreous pigments used in the present invention is not particularly limited, but the volume average particle diameter D50 of the particle diameter measured by MT-3300EXII (Microtrac Bell Co., Ltd.) is preferably 1 to 500 μm, more preferably 5 to 300 μm. Also, the aspect ratio is preferably 10 to 200. Further, the film thickness of the plurality of multilayer nacreous pigments is preferably 20 nm or more and 90 nm or less for each high refractive index layer (a), more preferably 30 nm or more and 80 nm or less, and even more preferably 40 nm or more and 70 nm or less. The low refractive index layer (b) of silica is preferably 50 nm to 140 nm, more preferably 60 nm to 130 nm, and even more preferably 70 nm to 120 nm. The metal oxide high refractive index layer (c) is preferably 20 nm to 160 nm, more preferably 30 nm to 150 nm, and even more preferably 40 nm to 140 nm.

[0017] The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00~80.00, a * The value is between -4.50 and -1.00, and b * It is preferable that L is in the range of -6.00 to -1.00. * The value is 62.00~79.00, a * The value is between -4.50 and -1.00, and b * It is more preferable that L is in the range of -6.00 to -1.00. * The value is 63.00~78.00, a * The value is between -4.50 and -1.00, and b * It is even more preferable that the value is in the range of -6.00 to -1.00. Furthermore, the pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00~80.00, a * The value is -4.50 to -1.00, b * The range is -6.00 to -1.00, and the saturation (C * Preferably, the h-value is in the range of 190.00 to 265.00, and L * The value is 62.00~79.00, a * The value is -4.50 to -1.00, b * The range is -6.00 to -1.00, and the saturation (C * It is more preferable that the h-value is in the range of 1.35 to 7.55 and the h-value is in the range of 192.00 to 263.00. * The value is 63.00~78.00, a * The value is -4.50 to -1.00, b * The range is -6.00 to -1.00, and the saturation (C *It is even more preferable that the h-value is in the range of 1.40 to 7.50 and the h-value is in the range of 193.00 to 262.00. Pigment compositions with such optical properties are pearlescent pigment compositions that have a good silver color while also possessing a silver interference color with appropriately adjusted saturation, which could not be achieved with the multilayer pearlescent pigments used as raw materials. To obtain a pigment composition having such optical properties, the mixing ratio of the multiple multilayer pearlescent pigments is preferably 1:10 to 10:1, more preferably 2:8 to 8:2, and even more preferably 3:7 to 7:3 in the case of a two-component mixture. In the case of a three-component or four-component mixture, the mixing ratio of each multilayer pearlescent pigment is preferably in the range of 1 to 10, more preferably in the range of 2 to 8, and even more preferably in the range of 3 to 7.

[0018] The pearlescent pigment composition having silver interference color according to the present invention can be applied to cosmetics, plastics, films, paints, inks, and the like. [Examples]

[0019] The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples. In this specification, the color tone of the pigment was measured with a colorimeter CM-2500. The particle size was measured with an MT-3300EXII (Microtrac-Bell Co., Ltd.) The measurement was performed using [a specific method]. The average particle size is approximately 90 μm.

[0020] Manufacturing Example 1 A slurry was prepared by dispersing 1500 ml of synthetic mica (average particle size 90 μm) in 1500 ml of water. Hydrochloric acid was added to the slurry while stirring to adjust the pH to 1.5. Next, 2.0 g of tin(IV) chloride solution (1.0 M) was added, and the mixture was heated to 80 ± 5 °C for 30 minutes to form a very thin SnO2 layer. Then, an aqueous titanium tetrachloride solution with a chlorine content of 39.8 wt% and a titanium content of 16.5 wt% was added dropwise to this slurry at a dropping rate of 1.5 g / min. Simultaneously, an aqueous sodium hydroxide solution of 20 wt% was added dropwise to adjust the pH of the slurry to 1.2 ± 0.2. In this way, the aqueous titanium tetrachloride solution was hydrolyzed, and titanium dioxide hydrate was precipitated on the surface of the raw material synthetic mica particles, forming a coating film. The titanium tetrachloride solution was added dropwise so that the thickness of the coating film on the synthetic mica was approximately 60 nm. The endpoint was reached by dropping a predetermined amount of titanium tetrachloride aqueous solution, and a high refractive index layer (a) was formed. Next, an aqueous sodium hydroxide solution was added to adjust the pH of the slurry to 7.5. 200 g of 47° sodium silicate No. 1 was added to this slurry at a dropping rate of 1.0 g / min. Simultaneously, hydrochloric acid was added dropwise to adjust the slurry's pH to 7.5 ± 0.5. The addition of a predetermined amount of 47° sodium silicate No. 1 marked the endpoint, creating a low refractive index layer (b). Next, the slurry was filtered using a Buchner funnel, and the filtration residue was washed with pure water. The filtration residue was dried at 105°C to obtain a powder with a low refractive index layer (b). This process was repeated three times to obtain approximately 450 g of work-in-progress powder. Next, 150 g of the work-in-progress powder was dispersed in 1500 ml of water to prepare a slurry. Hydrochloric acid was added to the slurry while stirring to adjust the pH to 1.5. Then, 2.0 g of tin(IV) chloride solution (1.0 M) was added, and the mixture was heated to 80 ± 5 °C for 30 minutes to form a very thin SnO2 layer. Next, an aqueous solution of titanium tetrachloride with a chlorine content of 39.8 wt% and a titanium content of 16.5 wt% was added dropwise to this slurry at a dropping rate of 1.5 g / min. Simultaneously, an aqueous solution of sodium hydroxide with a 20 wt% pH was added dropwise to adjust the pH of the slurry to 1.2 ± 0.2. In this way, the aqueous solution of titanium tetrachloride was hydrolyzed, and hydrated titanium oxide was precipitated on the surface of the raw material synthetic mica particles, forming a coating film. The titanium tetrachloride aqueous solution was added dropwise so that the thickness of the coating film on the synthetic mica was approximately 40-60 nm. The process was terminated by dropping a predetermined amount of titanium tetrachloride aqueous solution to create a high refractive index layer (c). Next, the slurry was filtered using a Buchner funnel, and the filtered residue was washed with pure water. After drying the filtered residue at 105°C, it was calcined at 800°C to obtain one multilayer pearlescent pigment (Sample A). Furthermore, using the work-in-progress powder, the amount of titanium tetrachloride aqueous solution added was increased in proportion to the thickness so that the titanium oxide thickness was approximately 70-90 nm and approximately 100-120 nm, respectively. The same procedure as when preparing sample A was performed to obtain samples B and C, respectively.

[0021] Example 1 Table 1 shows the color tones of the multilayer pearlescent pigments manufactured according to Manufacturing Example 1. The pearlescent pigment composition of the present invention was prepared by mixing the three types of multilayer pearlescent pigments listed in Table 1. 1 g of the pigment sample was mixed with 15 g of acrylic lacquer and coated to a thickness of 4 mil on black and white glossy paper. The black area of ​​the glossy paper coated with the sample was measured with a colorimeter CM-2500 and calculated as SCI. Here, SCI is the value obtained by measuring all reflected light, including specular reflection. Table 1 shows the color tones of the samples before mixing, and Table 2 shows the color tones of the samples after mixing the three pigments.

[0022] [Table 1]

[0023] [Table 2]

[0024] Example 2 Table 3 shows the color tones of the sample before mixing, measured in the same manner as in Example 1, and Table 4 shows the color tones of the sample after mixing the three pigments.

[0025] [Table 3]

[0026] [Table 4]

[0027] Example 3 Table 5 shows the color tones of the sample before mixing, measured in the same manner as in Example 1, and Table 6 shows the color tones of the sample after mixing the three pigments.

[0028] [Table 5]

[0029] [Table 6]

[0030] Example 4 Table 7 shows the color tones of the samples before mixing, measured in the same manner as in Example 1, and Table 8 shows the color tones of the samples after mixing the three pigments.

[0031] [Table 7]

[0032] [Table 8]

[0033] Example 5 Table 9 shows the color tones of the sample before mixing, measured in the same manner as in Example 1, and Table 10 shows the color tones of the sample after mixing the three pigments.

[0034] [Table 9]

[0035] [Table 10]

[0036] Example 6 Table 11 shows the color tones of the sample before mixing, measured in the same manner as in Example 1, and Table 12 shows the color tones of the sample after mixing the two pigments.

[0037] [Table 11]

[0038] [Table 12]

[0039] Example 7 Table 13 shows the color tones of the sample before mixing, measured in the same manner as in Example 1, and Table 14 shows the color tones of the sample after mixing the two pigments.

[0040] [Table 13]

[0041] [Table 14]

[0042] Example 8 Table 15 shows the color tones of the sample before mixing, measured in the same manner as in Example 1, and Table 16 shows the color tones of the sample after mixing the two pigments.

[0043] [Table 15]

[0044] [Table 16]

[0045] As is clear from Examples 1 to 8, it was found that a pearlescent pigment composition with a good silver color and appropriately adjusted silver interference color can be obtained, which could not be achieved with the raw material multilayer pearlescent pigment.

Claims

1. A pearlescent pigment composition having a silver interference color containing multiple multilayer pearlescent pigments, The aforementioned multilayer pearlescent pigments are multilayer pearlescent pigments having three layers on the surface of a flake-like substrate: a high refractive index layer of metal oxide (a), a low refractive index layer of silica (b), and a high refractive index layer of metal oxide (c). Each multilayer pearlescent pigment is L * The value is 57.00 to 79.00, a * The value is between -7.00 and 7.70, and b * The range is -16.00 to 15.00, but a * The value is between -4.50 and -1.00, and b * Values ​​in the range of -6.00 to -1.00 are essentially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00 to 80.00, a * The value is between -4.50 and -1.00, and b * The range is -6.00 to -1.

00. A pearlescent pigment composition having silver interference colors.

2. Each of the above multilayer nacreous pigments has an L * value of 57.00 to 79.00, an a * value of -7.00 to 7.70, a b * of -16.00 to 15.00, a chroma (C * ) of 4.00 to 17.50, and a hue angle (h) in the range of 80.00 to 350.00, provided that those with an a * value of -4.50 to -1.00 and a b * of -6.00 to -1.00 are substantially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00 to 80.00, a * The value is -4.50 to -1.00, b * The range is -6.00 to -1.00, and the saturation (C) * The h-value is in the range of 1.30 to 7.60, and the h-value is in the range of 190.00 to 265.

00. A pearlescent pigment composition having a silver interference color as described in claim 1.

3. The pearlescent pigment composition having a silver interference color according to claim 1, wherein the flake-like substrate is mica and the metal oxide is titanium dioxide.

4. The pearlescent pigment composition having a silver interference color according to claim 1, wherein the refractive index of the high refractive index layer is n ≥ 1.8 and the refractive index of the low refractive index layer is n < 1.

8.

5. A cosmetic, plastic, film, paint, or ink containing a pearlescent pigment composition having a silver interference color as described in any one of claims 1 to 4.

6. A method for producing a pearlescent pigment composition having silver interference color containing multiple multilayer pearlescent pigments, The aforementioned multilayer pearlescent pigments are multilayer pearlescent pigments having three layers on the surface of a flake-like substrate: a high refractive index layer of metal oxide (a), a low refractive index layer of silica (b), and a high refractive index layer of metal oxide (c). Each multilayer pearlescent pigment is L * The value is 57.00 to 79.00, a * The value is between -7.00 and 7.70, and b * The range is -16.00 to 15.00, but a * The value is between -4.50 and -1.00, and b * Values ​​in the range of -6.00 to -1.00 are essentially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00 to 80.00, a * The value is between -4.50 and -1.00, and b * The range is -6.00 to -1.

00. A method for producing a pearlescent pigment composition having silver interference color.

7. Each of the aforementioned multilayer pearlescent pigments is L * The value is 57.00 to 79.00, a * The value is -7.00 to 7.70, b * The range is -16.00 to 15.00, and the saturation (C) is 15.

00. * ) is in the range of 4.00 to 17.50, and the hue angle is in the range of 80.00 to 350.00, a * The value is between -4.50 and -1.00, and b * Values ​​in the range of -6.00 to -1.00 are essentially excluded. The pearlescent pigment composition having a silver interference color after mixing the plurality of multilayer pearlescent pigments is L * The value is 60.00 to 80.00, a * The value is -4.50 to -1.00, b * The range is -6.00 to -1.00, and the saturation (C) * The h-value is in the range of 1.30 to 7.60, and the h-value is in the range of 190.00 to 265.

00. A method for producing a pearlescent pigment composition having a silver interference color as described in claim 6.

8. A method for producing a pearlescent pigment composition having a silver interference color according to claim 7, wherein the flaky substrate is mica and the metal oxide is titanium dioxide.

9. A method for producing a pearlescent pigment composition having a silver interference color according to any one of claims 6 to 8, wherein the refractive index of the high refractive index layer is n ≥ 1.8 and the refractive index of the low refractive index layer is n < 1.8.

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