Effect pigment capable of realizing same color from different angles and preparation method thereof

Abstract

Effect pigments exhibiting substantially the same color when viewed from different angles and methods of making the same are disclosed. The effect pigment of the present invention comprises: a sheet-like substrate; and a pigment particle layer formed by adhering pigment particles to at least a part of the surface of the base material. In the pigment particle layer, the pigment particles are discontinuously present on the surface of the base material in the form of islands-type.

Description

Technical Field

[0001] The present invention relates to an effect pigment and a preparation method thereof, and more particularly to a novel effect pigment which shows the same color when viewed from different angles and a preparation method thereof. Background Art

[0002] Effect pigments are used in many areas of industry, in particular in the automotive, decorative coatings, plastics, paints, printing inks and in cosmetic formulations.

[0003] The effect pigments can show various colors, such as bright colors such as red, gold, and pearl, and dark colors such as black, depending on the type.

[0004] In particular, the effect pigment used in the technical field to which the present invention belongs has the effect of showing a significant color deviation depending on the viewing angle. Thus, when the color deviates greatly depending on the viewing angle, the color is different depending on the viewing angle, which affects the appearance.

[0005] In particular, if the color of a white effect pigment such as a pearlescent pigment greatly varies depending on the viewing angle, a dark color other than a white color may be seen at a specific angle.

[0006] Therefore, there is a need for new effect pigments whose colors do not deviate greatly with the viewing angle and which can maintain a consistent color. Summary of the invention

[0007] Technical issues

[0008] The object of the present invention is to provide a novel effect pigment whose color does not vary greatly depending on the viewing angle and can maintain substantially the same color, and a method for preparing the same.

[0009] Technical Solution

[0010] The effect pigment of the embodiment of the present invention for achieving the above-mentioned purpose comprises: a flake substrate; a pigment particle layer formed by attaching pigment particles to at least a portion of the surface of the substrate. In the pigment particle layer, the pigment particles are discontinuously present on the surface of the substrate in an island-type.

[0011] Preferably, the pigment particles may include one or more of metal oxides, zinc sulfide (ZnS) and barium sulfate (BaSO 4 ), and may also include organic pigments.

[0012] The effect pigment of the present invention may contain titanium dioxide (TiO 2 ), which is a preferred example of the above-mentioned metal oxide, to exhibit a white color.

[0013] The sheet-like substrate may be a plate-like material including one or more of synthetic mica, natural mica, glass flakes, plate-like glass, plate-like iron oxide, plate-like aluminum oxide, plate-like silicon dioxide, plate-like aluminum, and plate-like titanium dioxide.

[0014] Furthermore, based on 100 weight percent of the total effect pigments, the effect pigment of the present invention may contain 1 weight percent to 20 weight percent of the above-mentioned pigment particles.

[0015] The standard deviation of the HUE values ​​of the effect pigments of the present invention measured at -15°, 15°, 25°, 45°, 75° and 110° may be 10 or less.

[0016] Meanwhile, a method for preparing an effect pigment according to another embodiment of the present invention for achieving the above-mentioned purpose may include: step (a), preparing an organic binder solution containing pigment particles; step (b), mixing a flaky substrate and a solvent, stirring and dispersing the mixture to prepare a substrate suspension; and step (c), coating the pigment particles on the surface of the flaky substrate by mixing the substrate suspension and the organic binder solution.

[0017] The step (a) may include: step (a1), adding pigment particles into an organic binder solution; and step (a2), preparing an organic binder solution containing pigment particles by crushing the pigment particles.

[0018] The preparation method of the present invention may further include, after the above step (c): step (d), washing and dehydrating the above sheet-like substrate; step (e), drying the washed sheet-like substrate; and step (f), separating the substrate larger than a specified size from the dried sheet-like substrate by screening.

[0019] As described above, the pigment particles may include one or more of metal oxides, zinc sulfide, and barium sulfate, and may also include organic pigments.

[0020] The effect pigment of the present invention may contain titanium dioxide, which is a preferred example of the above-mentioned metal oxide, to exhibit a white color.

[0021] The sheet-like substrate may be a plate-like material including one or more of synthetic mica, natural mica, glass flakes, plate-like glass, plate-like iron oxide, plate-like aluminum oxide, plate-like silicon dioxide, plate-like aluminum, and plate-like titanium dioxide.

[0022] Furthermore, the effect pigment of the present invention may contain 1 to 20 weight percent of the above-mentioned pigment particles based on 100 weight percent of the total effect pigment.

[0023] Effects of the Invention

[0024] The effect pigment of the present invention has pigment particles attached to a flake-shaped substrate so that the color deviation with the viewing angle is small and the color can be kept consistent.

[0025] Therefore, the effect pigment of the present invention has an effect of showing substantially the same color from any angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 and Figure 2 The following is a scanning electron microscope (SEM) photograph showing the effect pigment of the present invention.

[0027] Figure 3 This is a sequence diagram showing the preparation process of the effect pigment of the present invention. DETAILED DESCRIPTION

[0028] Advantages and features of the present invention and methods for achieving the same will become more apparent with reference to the embodiments described in detail below and the accompanying drawings.

[0029] However, the present invention is not limited to the embodiments disclosed below, but can also be implemented in a variety of different forms. This embodiment is only provided to complete the disclosure of the present invention and to enable ordinary technicians in the technical field to which the present invention belongs to fully understand the scope of the present invention. The present invention is only defined by the scope of the protection scope of the invention.

[0030] The effect pigment and preparation method thereof according to the embodiment of the present invention are described in detail below.

[0031] Effect Pigments

[0032] First, the effect pigment of the present invention is described in detail.

[0033] The effect pigment of the present invention comprises: a flake-like substrate; and a pigment particle layer formed by attaching pigment particles to at least a portion of the surface of the substrate. In the pigment particle layer, the pigment particles are discontinuously present in the form of islands on the surface of the substrate.

[0034] Reference Figure 1 and Figure 2 It can be confirmed that the effect pigment of the present invention has pigment particles attached to the surface of the flaky substrate.

[0035] The pigment particles are present discontinuously in the form of islands on the surface of the substrate. In the present invention, the collection of the pigment particles is referred to as a pigment particle layer.

[0036] As described above, the effect pigment of the present invention has pigment particles attached to the surface of a flake-like substrate, and the pigment particles are present discontinuously in an island-type on the surface of the substrate. Therefore, the effect pigment of the present invention exhibits an effect of small color deviation depending on the viewing angle.

[0037] The type of the flaky substrate used in the effect pigment of the present invention is not particularly limited, and a plate-like material including one or more of synthetic mica, natural mica, glass flakes, plate-like glass, plate-like iron oxide, plate-like aluminum oxide, plate-like silicon dioxide, plate-like aluminum, and plate-like titanium dioxide can be used.

[0038] Next, the effect pigment of the present invention includes a pigment particle layer formed by attaching pigment particles to at least a portion of the surface of the sheet-like substrate.

[0039] As described above, in the present invention, the above-mentioned set of pigment particles is expressed as a pigment particle layer.

[0040] Preferably, the pigment particles may include one or more of metal oxides, zinc sulfide and barium sulfate, and may also include organic pigments.

[0041] The effect pigment of the present invention may contain titanium dioxide, which is a preferred example of the above-mentioned metal oxide, to exhibit a white color.

[0042] At the same time, as the titanium dioxide particles as the pigment particles are attached to the surface of the flaky substrate, the white color of the effect pigment of the present invention has little deviation depending on the viewing angle. In other words, the effect pigment of the present invention maintains substantially the same white color at multiple angles.

[0043] Preferably, the pigment particles may have an average particle size of 500 nm or less. More preferably, the pigment particles may have an average particle size of 100 to 300 nm. If the average particle size of the pigment particles is greater than 500 nm, poor adhesion to the surface of the sheet substrate may occur, causing the pigment particles to agglomerate. Therefore, when the average particle size of the pigment particles is greater than 500 nm, no pigment particle layer is formed on the surface of the sheet substrate, but the standard deviation of the HUE value described later may increase.

[0044] Preferably, based on 100 weight percent of the total effect pigments, 1 weight percent to 20 weight percent of the above-mentioned pigment particles may be included.

[0045] If the pigment particles are contained in an amount less than 1 weight percent, the color deviation of the pigment will increase due to the small amount of coating of the pigment particle layer. On the contrary, if the pigment particles are contained in an amount greater than 20 weight percent, the color deviation of the pigment will increase due to the increased amount of coating of the pigment particle layer.

[0046] Preferably, the standard deviation of the HUE values ​​of the effect pigments of the present invention measured at -15°, 15°, 25°, 45°, 75° and 110° may be 10 or less, more preferably, 8 or less, most preferably, 5 or less.

[0047] If the standard deviation of the HUE value is greater than 10, the color deviation with viewing angle is very large, so that the color varies with viewing angle.

[0048] In the present invention, the above-mentioned HUE value refers to a value measured in the following manner: After preparing a coating by mixing and dispersing a pigment and a resin for coating film formation, the coating is drawn down using a coating machine and then dried at room temperature to prepare a test piece, and the color difference value of the test piece is analyzed 10 times using a colorimeter (BYK, MAC i) and the average value is calculated to measure the Hue value.

[0049] The resin for forming the coating film may be a resin commonly used in the technical field to which the present invention belongs, for example, an acrylic resin (product name: Na clear) or the like may be used.

[0050] The effect pigment of the present invention described above has pigment particles attached to the surface of a flake-like substrate, and the pigment particles are present discontinuously in the form of islands on the surface of the substrate. Therefore, the effect pigment of the present invention exhibits an effect of small color deviation depending on the viewing angle.

[0051] The product to which the effect pigment of the present invention is applicable may have any form of automotive coatings, ordinary coatings, coatings, powder coatings, printing inks, coating compositions, plastics, adhesives, papermaking raw materials, building materials, rubber compositions, and cosmetic-related compositions. Preferably, the effect pigment may be used in a content range of 0.01 weight percent to 30 weight percent based on the total weight of the above-mentioned products.

[0052] Method for preparing effect pigments

[0053] Hereinafter, a method for preparing an effect pigment according to another embodiment of the present invention will be described in detail.

[0054] Figure 3 The present invention is a flowchart showing a method for preparing an effect pigment according to an embodiment of the present invention.

[0055] Reference Figure 3The method for preparing the effect pigment of the present invention comprises: step (a), preparing an organic binder solution containing pigment particles (step S110); step (b), mixing a sheet substrate and a solvent, stirring and dispersing them to prepare a substrate suspension (step S120); and step (c), coating the pigment particles on the surface of the sheet substrate by mixing the substrate suspension and the organic binder solution (step S130).

[0056] First, the above step (a) (step S110 ) is a step of preparing an organic binder solution containing pigment particles.

[0057] The organic binder solution used in the above step (a) (step S110) may include one or more of polymers or copolymers of cellulose, cellulose acetate, polyamide, epoxy resin, polyester, melamine resin, polyurethane, resin vinyl resin, silicone resin, acrylate, methacrylate, styrene, ethylene, propylene, acrylic resin and their derivatives, but the organic polymer resin used in the present invention is not particularly limited to the above examples.

[0058] Preferably, the organic binder solution contains 5 to 50 parts by weight of the organic polymer resin relative to 100 parts by weight of the organic binder solution. If the organic polymer resin is less than 5 parts by weight, it is difficult to obtain the required resin adhesion. On the contrary, if the organic polymer resin is greater than 50 parts by weight, the content of the organic polymer resin is higher than the amount of the binder resin, which may cause aggregation of particles or substrates.

[0059] The pigment particles used in the present invention can be used without particular limitation as long as they can express a desired color.

[0060] Preferably, the pigment particles may include one or more of metal oxides, zinc sulfide and barium sulfate, and may also include organic pigments.

[0061] The effect pigment of the present invention may contain titanium dioxide, which is a preferred example of the above-mentioned metal oxide, to exhibit a white color.

[0062] Preferably, the pigment particles may be included in an amount of 5 to 60 parts by weight relative to 100 parts by weight of the organic binder solution. If the pigment particles are included in an amount of less than 5 parts by weight, the amount of the organic polymer resin and the binder resin relative to the pigment particles is relatively large, thereby reducing the bonding efficiency. On the contrary, if the pigment particles are included in an amount of more than 60 parts by weight, the amount of the organic polymer resin and the binder resin is relatively small, thereby making it difficult to obtain the desired bonding effect.

[0063] Furthermore, the organic binder solution may further contain a dispersant and a defoaming agent as necessary.

[0064] The above-mentioned dispersant can be any known dispersant in the technical field to which the present invention belongs without limitation, and preferably, 1 to 5 parts by weight are included relative to 100 parts by weight of the above-mentioned organic binder solution. If the above-mentioned dispersant is less than 1 part by weight, the required dispersing effect cannot be obtained, and if it is greater than 5 parts by weight, the dispersing efficiency will be reduced due to the excessive concentration of the dispersant.

[0065] The defoaming agent can be any defoaming agent known in the technical field of the present invention without limitation, and preferably, 1 to 5 parts by weight are included relative to 100 parts by weight of the organic binder solution. If the dispersant is less than 1 part by weight, the desired defoaming effect cannot be obtained, and if it is greater than 5 parts by weight, the defoaming efficiency will be reduced due to the high concentration of the defoaming agent.

[0066] Meanwhile, the above step (a) (step S110) may include: step (a1), adding pigment particles into an organic binder solution; and step (a2), preparing an organic binder solution containing pigment particles by crushing the above pigment particles.

[0067] Furthermore, the step (a) (step S110) may further include: a step (a1') of crushing the pigment particles; and a step (a2') of adding the crushed pigment particles into an organic binder solution to prepare an organic binder solution containing pigment particles.

[0068] The method for pulverizing the above-mentioned pigment particles can use a known pulverization method without particular limitation. However, from the perspective of process efficiency, it is preferred that the above-mentioned pigment particles contained in the above-mentioned organic binder solution are pulverized into appropriate sizes using a grinding device with a grinding force.

[0069] Next, the step (b) (step S120 ) is a step of mixing the sheet-like substrate and the solvent and then stirring and dispersing them to prepare a substrate suspension.

[0070] Among them, preferably, the above-mentioned sheet substrate is not particularly limited as long as it is a plate-like substrate, and a substrate comprising a plate-like material can be used, and the above-mentioned plate-like material includes one or more of synthetic mica, natural mica, glass flakes, plate-like glass, plate-like iron oxide, plate-like aluminum oxide, plate-like silicon dioxide, plate-like aluminum and plate-like titanium dioxide.

[0071] The above-mentioned solvent can use the organic solvent known in the technical field to which the present invention belongs, specifically, can use: hexane, octane, silane, isodecane, cyclohexane, methylcyclohexane, toluene, xylene, ethylbenzene and other hydrocarbon solvents; methanol, ethanol, propanol, isopropanol, butanol, isobutanol, hexanol, benzyl alcohol, cyclohexanol, and other alcohol solvents; ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, dipropylene glycol dimethyl ether, diethylene glycol monobutyl ether, butyl triethylene glycol, methyl dipropylene glycol, methyl cellosolve acetate, propylene glycol monomethyl ether ethyl The organic solvents used in the present invention include ethyl ether, dipropylene glycol butyl ether acetate, diethylene glycol monobutyl ether acetate, etc.; ether solvents such as ethyl ether, dipropyl ether, methyl cyclopropyl ether, tetrahydrofuran, dioxane, anisole, etc.; ketone solvents such as methyl ethyl ketone, diethyl ketone, methyl isobutyl ketone, cyclohexanone, isophorone, acetophenone, etc.; ester solvents such as methyl acetate, ethyl acetate, butyl acetate, propyl acetate, methyl butyrate, ethyl butyrate, caprolactone, methyl lactate, ethyl lactate, etc.; halogenated solvents such as chloroform and dichloromethane; amine solvents such as dimethylformamide, dimethylacetamide, 2-pyrrolidone, N-methylpyrrolidone, caprolactam, etc.; dimethyl sulfoxide, cyclopentane, tetramethyl urea, ethylene carbonate, propylene carbonate, dimethyl carbonate, etc. However, the type of organic solvent used in the present invention is not particularly limited.

[0072] Preferably, the stirring speed in the above step (b) (step S120) is maintained at 100-500 rpm. If the above stirring speed is less than 100 rpm, the dispersion effect will be reduced and the pigment particles will agglomerate with each other. If it is greater than 500 rpm, the dispersion efficiency will be reduced.

[0073] Next, the step (c) (step S130 ) is a step of coating the pigment particles on the surface of the sheet-like substrate by mixing the substrate suspension and the organic binder solution.

[0074] After the above step (c), the following steps may be further included as needed: step (d), washing and dehydrating the above sheet-like substrate; step (e), drying the washed sheet-like substrate; and step (f), separating substrates larger than a specified size from the dried sheet-like substrate by screening.

[0075] Preferably, the drying step (e) is performed at a temperature of 60 to 180° C. If the drying temperature is lower than 60° C., the drying time is too long, resulting in reduced productivity, while if the drying temperature is higher than 180° C., the pigment particles are damaged, resulting in reduced properties after drying.

[0076] Preferably, the screening step of step (f) above separates the sheet substrate having a particle size greater than 100 μm. In addition, the above step (f) can also be used to remove the agglomerated particles formed in the reaction. The screening method of the above screening step can be performed using a mesh with a preset size, but is not particularly limited.

[0077] Example

[0078] The structure and function of the present invention are described in more detail below through the preferred embodiments of the present invention, but these are only presented as preferred examples of the present invention and should not be interpreted as limiting the present invention in any aspect.

[0079] The contents not described here can be fully deduced by ordinary technicians in the technical field to which the present invention belongs in a technical manner, and therefore, the description thereof will be omitted.

[0080] 1. Example 1

[0081] (1) Preparation of organic binder solution

[0082] 55 g of acrylic organic binder resin, 25 g of primary distilled water, 0.15 g of dispersant, and 0.4 g of defoamer were placed in a 250 ml beaker and stirred for more than 1 hour using a magnetic bar. After the binder solution was stirred and mixed, 45 g of titanium dioxide pigment was added and stirred for 1 hour. The average particle size of the titanium dioxide pigment was 100 to 200 nm.

[0083] The high-purity titanium dioxide organic binder solution prepared by the above process was placed in a 500 ml polyethylene bottle (PE Bottle) for ball milling together with 150 g of zirconium dioxide balls (ZrO2 Ball), and then ground using a grinding equipment for 10 to 72 hours.

[0084] (2) Preparation of effect pigments

[0085] 150 g of a plate-like mica substrate and 150 g of ethanol were placed in a 1 L beaker and stirred and dispersed at 150 rpm at a temperature of 35 to 40° C. to prepare a substrate suspension.

[0086] Next, 8.4 g of the organic binder solution was dropped into the substrate suspension using a pump.

[0087] Then, the reaction was terminated after stirring for 30 minutes, and the mixture was washed with water and dehydrated, and then dried at 120° C. for 30 minutes. The substrate was screened using a net to remove substrates larger than a predetermined size or aggregated particles generated during the reaction.

[0088] The effect pigment including the pigment particle layer formed by titanium dioxide particles attached to the surface of the substrate is synthesized through the above process.

[0089] In the pigment of Example 1, the content of titanium dioxide particles is 2 weight percent relative to the total pigment.

[0090] 2. Example 2

[0091] The effect pigment of Example 2 was prepared in the same manner as in Example 1, except that the content of the titanium dioxide particles was 5 weight percent relative to 100 weight percent of the total pigment.

[0092] 3. Example 3

[0093] The effect pigment of Example 3 was prepared in the same manner as in Example 1, except that the content of the titanium dioxide particles was 10 weight percent relative to 100 weight percent of the total pigment.

[0094] 4. Example 4

[0095] The effect pigment of Example 3 was prepared in the same manner as in Example 1, except that the content of the titanium dioxide particles was 15 weight percent relative to 100 weight percent of the total pigment.

[0096] 6. Comparative Examples

[0097] Four types of commercially available effect pigments from CQV Co., Ltd. were prepared as comparative examples.

[0098] The following four effect pigments are all coated evenly with a titanium dioxide coating on a flake-shaped substrate.

[0099] Comparative Example 1: Adamas AE-901K-SP

[0100] Comparative Example 2: R901S

[0101] Comparative Example 3: A-801K-OP

[0102] Comparative Example 4: Adamas AE-901K-OP

[0103] Evaluation of Physical Properties of Examples

[0104] 1. Observe the paint surface

[0105] The surfaces of the effect pigments of Examples 1 and 2 prepared in the above manner were observed using a scanning electron microscope. Figure 1 to Figure 2 shown.

[0106] Reference Figure 1 and Figure 2 It can be confirmed that the titanium dioxide particles of the effect pigment of the present invention are coated on the surface of the sheet-like substrate in an island shape.

[0107] 2. Analyze the standard deviation of HUE values

[0108] The HUE values ​​of the pigments of Examples and Comparative Examples at -15°, 15°, 25°, 45°, 75°, and 110° were measured, and the standard deviation of each HUE value was calculated.

[0109] The samples of Examples 1 to 5 and Comparative Examples 1 to 4 were respectively mixed and dispersed with a coating film forming resin (product name: NA Clear) at a ratio of 6:94 to prepare coatings, and the coatings were applied by a coating machine and dried at room temperature to prepare test pieces.

[0110] Then, the color difference value of the test piece was analyzed 10 times using a colorimeter (MAC i, BYK) and the average value was calculated to obtain the Hue value of the coating resin.

[0111] Table 1

[0112]

[0113] Table 2

[0114] HUE value deviation Example 1 4.3 Example 2 3.5 Example 3 5.8 Example 4 4.8 Comparative Example 1 13.6 Comparative Example 2 15.3 Comparative Example 3 12.0 Comparative Example 4 11.1

[0115] Referring to Table 1 and Table 2, it can be confirmed that the standard deviation of the HUE values ​​of the effect pigments of the embodiments of the present invention at -15°, 15°, 25°, 45°, 75° and 110° is less than 10.

[0116] Therefore, it was confirmed that the effect pigment of the present invention has a small standard deviation of the HUE value measured at a plurality of angles, and thus can express a color of substantially the same color system at a plurality of angles.

[0117] However, it was confirmed that the standard deviation of the HUE values ​​of the pigment of Comparative Example 1 having no coating layer to which pigment particles are attached was larger than 10 at -15°, 15°, 25°, 45°, 75°, and 110°.

[0118] Different from the examples, the effect pigments of Comparative Examples 1 to 4 have large standard deviations of HUE values ​​measured at multiple angles, and therefore exhibit different colors at multiple angles.

[0119] The embodiments of the present invention are described above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, but can be transformed into other various forms. It should be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical concept or essential features of the present invention. Therefore, it should be understood that the embodiments described above are only examples and not limitations in any aspect.

Claims

1. An effect pigment, characterized in that Include: Sheet substrate; The pigment particle layer is formed by attaching pigment particles to at least a portion of the surface of the substrate. In the pigment particle layer, the pigment particles are present discontinuously in the form of islands on the surface of the substrate.

2. The effect pigment according to claim 1, characterized in that The pigment particles include one or more of metal oxides, zinc sulfide, and barium sulfate.

3. The effect pigment according to claim 2, characterized in that The above-mentioned metal oxides include titanium dioxide.

4. The effect pigment according to claim 1, characterized in that The sheet-like substrate is a plate-like material including one or more of synthetic mica, natural mica, glass flakes, plate-like glass, plate-like iron oxide, plate-like aluminum oxide, plate-like silicon dioxide, plate-like aluminum, and plate-like titanium dioxide.

5. The effect pigment according to claim 1, characterized in that Based on 100 weight percent of the total effect pigments, 1 weight percent to 20 weight percent of the above pigment particles are included.

6. The effect pigment according to claim 1, characterized in that The standard deviation of the HUE values ​​measured at -15°, 15°, 25°, 45°, 75°, and 110° was 10 or less.

7. A method for preparing an effect pigment, characterized in that: include: Step (a), preparing an organic binder solution containing pigment particles; Step (b), mixing the flaky substrate and the solvent, stirring and dispersing the mixture to prepare a substrate suspension; as well as Step (c) is to coat the pigment particles on the surface of the sheet-like substrate by mixing the substrate suspension with the organic binder solution.

8. The method for preparing the effect pigment according to claim 7, characterized in that: The above step (a) comprises: Step (a1), adding pigment particles into an organic binder solution; and Step (a2) is to prepare an organic binder solution containing pigment particles by pulverizing the above-mentioned pigment particles.

9. The method for preparing the effect pigment according to claim 7, characterized in that: The above step (a) comprises: Step (a1'), crushing the pigment particles; and In step (a2'), the crushed pigment particles are added to an organic binder solution to prepare an organic binder solution containing pigment particles.

10. The method for preparing the effect pigment according to claim 7, characterized in that: The organic binder solution further includes a dispersant and a defoaming agent.

11. The method for preparing the effect pigment according to claim 7, characterized in that: The pigment particles include one or more of metal oxides, zinc sulfide, and barium sulfate.

12. The method for preparing the effect pigment according to claim 11, characterized in that: The above-mentioned metal oxides include titanium dioxide.

13. The method for preparing the effect pigment according to claim 7, characterized in that: The sheet-like substrate is a plate-like material including one or more of synthetic mica, natural mica, glass flakes, plate-like glass, plate-like iron oxide, plate-like aluminum oxide, plate-like silicon dioxide, plate-like aluminum, and plate-like titanium dioxide.

14. The method for preparing the effect pigment according to claim 7, characterized in that: After the above step (c), the method further comprises: Step (d), washing and dehydrating the sheet substrate; Step (e), drying the washed sheet substrate; and Step (f) is to separate substrates larger than a specified size from the dried flaky substrates by screening.

15. The method for preparing the effect pigment according to claim 7, characterized in that: Based on 100 weight percent of the total effect pigments, 1 weight percent to 20 weight percent of the above pigment particles are included.

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