Paint for forming multicolored patterns, method for forming a film of paint for forming multicolored patterns, coated article, and method for manufacturing paint for forming multicolored patterns

Abstract

To achieve a multicolor pattern-formable coating or the like which easily achieves a coating layer excelling in a glaring, powerful brightness or the like.SOLUTION: A multicolor pattern-formable coating comprises a binder resin, first colored flakes, second colored flakes that are different in color tone from the first colored flakes, and a glitter comprising glass flakes as a substrate, wherein, the first and second colored flakes are 150 μm or less in thickness.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a paint for forming a multicolor pattern, a method for forming a film of the paint for forming a multicolor pattern, a coated article, and a method for producing the paint for forming a multicolor pattern. [Background technology]

[0002] Multicolor paints have traditionally been used for exterior wall painting. Multicolor paints are often used on the exterior walls of houses, and JIS K-5667 states that "multicolor paints are liquid or gel-like paints containing suspended particles of two or more colors, and can produce a scattered pattern with a single coat" (JIS K 5567-2003 1. Scope and Notes).

[0003] In recent years, various paints containing glittering materials have been proposed for the purpose of achieving more vivid designs.

[0004] For example, Patent Document 1 discloses "a multicolored pattern paint comprising a dispersion medium and colored dispersed particles dispersed in the dispersion medium in a state where they are not dissolved, and which, in addition to the colored dispersed particles, contains scale-like pigments having an average diameter in the upward direction of the plate of 1 to 10 mm and whose surface is coated with a synthetic resin film that does not impair transparency," and states that this "makes it possible to form a patterned coating film with a partially sparkling, cracked texture similar to that of natural granite." Examples of the scale-like pigments include mica flakes, plastic film flakes, and glass flakes. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 08-151541 (Claim 1, Claim 2, Paragraph 0013) Summary of the Invention [Problem to be solved by the invention]

[0006] Among the glittering materials, those based on glass flakes have the characteristic of high surface smoothness, which gives them a strong, dazzling shine and makes the design of the coating film more vivid. There has been a demand for multicolored pattern paints that take advantage of the characteristics of glass flakes.

[0007] However, when glass flakes are used as the scale-like pigment in the multicolored paint described in Patent Document 1, the resulting paint film sometimes does not fully utilize the bright, powerful shine that is characteristic of glass flakes and the three-dimensional effect of the coated surface.

[0008] The present invention has been made in consideration of the above matters, and aims to provide a paint for forming a multicolored pattern that can easily produce a coating film that has an excellent, dazzling, powerful shine. [Means for solving the problem]

[0009] In order to solve the above problems, a paint for forming a multicolored pattern is provided, which contains a binder resin, first colored flakes, second colored flakes having a color tone different from that of the first colored flakes, and a glittering material (glittering pigment) having glass flakes as a base material. The paint of the present invention is referred to as a "paint for forming multicolored patterns" because the paint of the present invention does not fall under the category of "a liquid or gel-like substance containing suspended particles of two or more colors" and, strictly speaking, does not fall within the category of "multicolored pattern paint" as defined by the aforementioned JIS K-5667.

[0010] This paint for forming multicolor patterns makes it easier to realize multicolor pattern coating films that have an excellent, dazzling, powerful shine. The inventors of the present invention have conducted extensive research and development to solve the above problems. Surprisingly, they have discovered that the above problems can be solved by replacing the colored gel particles used in multicolor paints with colored flakes. The following explains the possible mechanisms behind this.

[0011] As mentioned above, multicolor paints are characterized by the fact that they contain suspended particles of two or more colors in liquid or gel form (hereinafter referred to as colored gel particles, etc.), allowing for the creation of scattered patterns with a single coat of paint. In order to achieve this "scattered pattern" design, it was necessary to include large colored gel particles, etc. Recently, in particular, designs such as those seen in natural stone designs, where each color is large and the multicolored pattern is clearly recognizable even from a distance, have become popular. Therefore, to create such large patterns, it was necessary to use multicolor paints containing large colored gel particles, etc., several millimeters in size.

[0012] However, when glass flakes are blended into such multicolored paints, the strong, dazzling brightness that is characteristic of glass flakes may not be fully utilized. This phenomenon occurs when the orientation of the glass flakes becomes difficult to align after film formation, resulting in scattering of reflected light, or when the colored gel particles are destroyed, causing the pigments in the particles to diffuse into the dispersion medium, resulting in color bleeding and clouding.

[0013] That is, the entire glass flake or its edges may climb up on large colored gel particles or the like, causing the glass flake to tilt, and this tilt may remain even after the coating film has dried. Some of the colored gel particles are roughly spherical, and when they dry, they tend to have a raised center. As a result, the glass flakes that are entirely mounted on the colored gel particles also tend to tilt. In the past, this phenomenon caused the glass flakes to become misaligned, scattering the reflected light and preventing the glass flakes from taking full advantage of their distinctive bright, powerful brilliance.

[0014] Furthermore, colored gel particles tend to settle during storage. Multicolored paints that experience this settling must be thoroughly stirred before use to ensure uniform dispersion of the colored particles. However, during stirring, glass flakes can penetrate the colored gel particles, destroying them. This can cause the pigments in the colored gel particles to diffuse into the dispersion medium, resulting in a blurred, cloudy color. This can prevent (or hinder) the glass flakes' distinctive, vibrant sparkle.

[0015] The paint for forming multicolored patterns of the present invention solves this problem by using colored flakes instead of colored gel particles and blending in a glittering material based on glass flakes. In other words, the paint for forming a multicolored pattern of the present invention makes it easy to align the orientation of the glass flakes, so even with a relatively small amount of the paint, it is easy to achieve a multicolored patterned coating film with an excellent, dazzling, powerful shine. Furthermore, during stirring before painting, the pigments of the colored flakes do not diffuse into the dispersion medium, causing the color to blur and become cloudy, and the bright, powerful brilliance that is unique to glass flakes is not easily impaired. Furthermore, when a film is formed on a panel with a recessed finish, it becomes easier to create a colorful patterned coating that takes advantage of the three-dimensional effect created by the recessed finish. In addition, even if the glass flakes pierce the colored flakes during stirring, the pigments and the like do not bleed out from the inside, making the pattern unclear, and the size of the colored flakes is unlikely to decrease.

[0016] It is also preferable that the first colored flakes and the second colored flakes are paints for forming a multicolored pattern and have a thickness of 150 μm or less.

[0017] In this paint for forming a multicolored pattern, even if the end of a glass flake lands on the first colored flake or the second colored flake, the inclination of the glass flake with respect to the panel is reduced, which allows the glass flake to efficiently reflect specularly reflected light onto the panel, resulting in a strong sense of sparkle. The thickness of the first colored flakes and the second colored flakes is more preferably 20 to 120 μm, even more preferably 40 to 100 μm, and most preferably 60 to 90 μm.

[0018] It is also preferable that the first colored flakes and the second colored flakes are paints for forming a multicolored pattern, including flakes that do not pass through a sieve with an opening size of 1.3 mm.

[0019] This paint for forming multicolored patterns contains large colored flakes, making it easy to create a so-called "scattered pattern" design.

[0020] The glittering material is preferably a paint for forming a multicolored pattern, having an average particle size of 15 to 800 μm.

[0021] The larger the average particle size of the luster material based on glass flakes, the more brilliant it becomes. However, if the average particle size of the luster material exceeds 800 μm, the luster may be impaired. The average particle size of the luster material is more preferably 80 to 800 μm, even more preferably 230 to 800 μm, and most preferably 480 to 600 μm. The average particle size here can be determined as the median diameter (d50, volume basis) based on cumulative distribution from the particle size distribution measured by the laser diffraction / scattering method using a commercially available laser diffraction / scattering particle size distribution analyzer.

[0022] The above-mentioned glittering material is also preferably a paint for forming a multicolored pattern, in which the thickness of the glass flakes serving as the base material is 0.1 to 10 μm.

[0023] A lustrous material based on glass flakes of such a thickness has an improved lustrous feel and can therefore be suitably used in paints for forming colorful patterns. The thickness of the glass flakes is more preferably 0.2 to 10 μm, even more preferably 0.5 to 6 μm, and most preferably 1 to 5 μm.

[0024] It is also preferable that the lustrous material is contained in an amount of 0.5 to 5.0% by weight of the solid content of the paint for forming a multicolor pattern. This paint for forming a multicolor pattern makes it easier to realize a multicolor pattern coating film that is excellent in terms of a dazzling, powerful lustre.

[0025] The content of the luster material in the solid content of the paint for forming a multicolored pattern is more preferably 0.7 to 4.0% by weight, even more preferably 1.0 to 3.5% by weight, and most preferably 1.2 to 2.0% by weight.

[0026] It is also preferable that the first colored flakes and the second colored flakes contain an acrylic silicone resin and a pigment, and that the paint is for forming a multicolored pattern.

[0027] Acrylic silicone resins are particularly excellent in weather resistance, so by using colored flakes containing acrylic silicone resins and pigments, it is possible to form coating films with excellent durability and with little change in color tone over time.

[0028] The above-mentioned problem can also be solved by a paint for forming a multicolored pattern, which includes a binder resin, first colored flakes, second colored flakes having a different color tone from the first colored flakes, and a lustrous material based on glass flakes, wherein the first colored flakes and the second colored flakes have a thickness of 150 μm or less and include flakes that do not pass through a sieve with an opening size of 1.3 mm, the lustrous material has an average particle size of 15 to 800 μm and a thickness of 0.1 to 10 μm, and the lustrous material is contained in an amount of 0.5 to 5.0 wt % of the solid content of the paint for forming a multicolored pattern.

[0029] The above problem can also be solved by a method for forming a film of a paint for forming a multicolored pattern, which includes an enamel coating film forming step of applying an enamel paint to the surface of a surface to be painted, such as an exterior wall, to form a film, and a multicolored pattern coating film forming step of applying any of the above-mentioned paints for forming a multicolored pattern to the surface of the enamel coating film formed in the enamel coating film forming step to form a film. The enamel paint described here is a paint that has colored pigments dispersed in a clear paint made from a resin solution to ensure hiding properties. Unless otherwise specified, this will be the same hereafter.

[0030] Furthermore, the above-mentioned problems are solved by a painted article having a multicolored pattern coating film formed by any one of the paints for forming a multicolored pattern described above.The above-mentioned problems are also solved by a painted article having a multicolored pattern coating film formed on the surface side of a panel by any one of the paints for forming a multicolored pattern described above.

[0031] In addition, the above-mentioned problems are also solved by a method for producing a paint for forming a multicolored pattern, which includes a paint-making step of mixing a binder resin, first colored flakes, second colored flakes having a color tone different from that of the first colored flakes, and a glitter material based on glass flakes to produce a paint. [Effects of the Invention]

[0032] The present invention makes it possible to realize a coating material for forming a multicolored pattern that can easily produce a coating film that has an excellent, bright and powerful shine. DETAILED DESCRIPTION OF THE INVENTION

[0033] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below by way of example. A paint for forming a multicolored pattern contains a binder resin, first colored flakes, second colored flakes, and a glittering material. The present invention will be illustrated below by giving specific embodiments and examples, but the present invention is not limited to the following embodiments.

[0034] 1. Binder resin The binder resin is a resin that disperses the first colored flakes, the second colored flakes, and the metallic pigment.

[0035] The binder resin is not particularly limited. For example, known synthetic resins such as acrylic resin, ethylene-acrylic resin, vinyl acetate-acrylic resin, styrene-acrylic resin, urethane resin, silicone resin, urethane-acrylic resin, and acrylic-silicone resin can be used as the binder resin, as well as rubber latexes such as chloroprene latex and acrylic butadiene latex. Among these, it is preferable to use an acrylic silicone resin from the viewpoint of weather resistance. For example, an acrylic silicone resin or a ceramic-modified acrylic silicone resin is suitable. An example of an acrylic silicone resin is "Polydurex G-625" manufactured by Asahi Kasei Corporation.

[0036] The binder resin is usually used in the form of a binder resin solution, for example, by dissolving it in a solvent or dispersing it in a solvent (particularly a water solvent) to form a resin emulsion.

[0037] 2. First colored flakes The first colored flakes are colored flaky powder. The flake shape includes flat plate shapes such as plates and scales. The colored flakes preferably contain a resin and a pigment.

[0038] Such colored flakes can be obtained, for example, by applying a thin layer of a liquid raw material containing a resin and a pigment to a peelable substrate, drying it, peeling it off from the substrate, and pulverizing it. The first method for producing colored flakes will now be described by way of example.

[0039] First, a liquid raw material is prepared as the base for the colored flakes. The liquid raw material can contain a synthetic resin, a solvent, a coloring pigment as a coloring component, etc. In addition, it may contain an extender pigment, an aggregate, a thickener, a leveling agent, etc.

[0040] As the synthetic resin, various synthetic resins and rubber latexes can be used. Among them, it is preferable to use an acrylic silicone resin from the viewpoint of weather resistance. For example, an acrylic silicone resin or a ceramic-modified acrylic silicone resin is suitable. An example of an acrylic silicone resin is "Polydurex H-7650" manufactured by Asahi Kasei Corporation.

[0041] The synthetic resin can be used in the form of a resin emulsion in which the synthetic resin is dissolved in a solvent or dispersed in a solvent (particularly, a water solvent).

[0042] Examples of coloring pigments that can be used include titanium oxide, yellow iron oxide, red iron oxide (ferric oxide: red iron oxide), phthalocyanine blue, ochre, ultramarine blue, carbon black, black iron oxide, etc. Examples of extender pigments that can be used include calcium carbonate, clay, talc, kaolin, bentonite, silica powder, diatomaceous earth, white carbon, etc.

[0043] As the aggregate, materials that are finely grained when mined, such as silica sand, for example, natural stones such as kansui stone, granite, marble, etc., crushed into fine particles, as well as glass beads, plastic beads, kansui sand or silica sand cores coated with paint or glaze can be used.

[0044] One method for producing colored flakes is to apply the liquid raw material to a flat, peelable substrate using a coating method that can ensure a constant film thickness (e.g., a film applicator: JIS-K5101) and then dry it. It is preferable to apply the raw material to a thickness that results in a dry thickness of 150 μm or less. Most preferably, the raw material is applied to a thickness that results in a dry thickness of 75 μm ± 15 μm. Thereafter, the coating film is peeled off from the substrate and crushed by crushing means to obtain colored flakes.

[0045] The colored flakes thus obtained can be sieved through a sieve with a predetermined mesh size, and those that pass through the sieve can be used as the first colored flakes. For example, those that pass through a sieve with a mesh size of 2.38 mm can be used as the first colored flakes.

[0046] As described below, the obtained colored flakes can also be sieved to classify them into large-diameter colored flakes, medium-diameter colored flakes, small-diameter colored flakes, etc., and these can be mixed in any ratio to use as the first colored flakes.

[0047] The first color flakes can be composed of color flakes of a single color, for example, only white color flakes, only gray color flakes, or only black color flakes.

[0048] 3. Second colored flakes The second colored flakes are also colored flaky powders, just like the first colored flakes. However, the second colored flakes must have a different color tone from the first colored flakes. A different color tone means that the difference in hue, saturation, or brightness is such that it can be distinguished at a glance. For example, the color difference ΔE between the two colored flakes can be greater than 10. The color difference ΔE between two colors can be calculated by using their brightness (L value), redness (a value), and yellowness (b value) (ΔL 2 +Δa 2 +Δb 2 ) ‐1 / 2 ΔL is the difference between the L values ​​of the two colors, Δa is the difference between the a values ​​of the two colors, and Δb is the difference between the b values ​​of the two colors.

[0049] The method for producing the second colored flakes is the same as the method for producing the first colored flakes, so we will not explain it here.However, as mentioned above, in order to achieve a different color tone from the first colored flakes, the type and blending ratio of the color pigments must be different from those of the first colored flakes.

[0050] 4. Bright material The glittering material is based on glass flakes. Glass flake-based glittering materials have superior surface smoothness compared to glittering materials based on aluminum flakes or mica, and therefore have a bright, powerful shine.

[0051] The surfaces of the glass flakes are preferably coated with various coatings, such as metal coatings of gold or silver, or metal oxide coatings. The metal oxide used for coating is not particularly limited as long as it can exhibit a lustrous appearance. Examples of metal oxides include titanium oxide, iron oxide, zinc oxide, tin oxide, aluminum oxide, silicon oxide, copper oxide, nickel oxide, and cobalt oxide. These metal oxides can be used alone or in combination of two or more.

[0052] Among these, it is preferable that the metal oxide used for the coating is at least one of titanium oxide and iron oxide, in which case the manufacturing cost of the lustrous material is low and good lustrous properties can be exhibited at low cost.

[0053] The average particle size of the luminous material is preferably 15 to 800 μm. This average particle size range exhibits particularly excellent luminous properties. Furthermore, it is preferable that 20% by weight or more of the luminous material is of a size that will not pass through a sieve with an opening size of 300 μm.

[0054] The thickness of the glass flakes serving as the substrate is preferably 0.1 to 10 μm.Within this range of average particle size, particularly excellent brilliance is exhibited.

[0055] 3. Manufacturing method of paint for forming multicolored patterns The binder resin, the first colored flakes, the second colored flakes, and the luster material are used to produce a paint for forming a multicolored pattern. Specifically, in the paint-making process, a binder resin solution such as an emulsion resin solution, the first colored flakes, the second colored flakes, and the luster material are mixed and dispersed in a predetermined ratio to produce a paint.

[0056] As the first colored flakes and the second colored flakes, those that have passed through a sieve with an opening size of 2.38 mm can be used as described above. The first and second colored flakes can be classified into large, medium, and small colored flakes, and these can be blended in any ratio. For example, a weight ratio of 1:1 large colored flake to 1.5 to 2.5 medium colored flakes and 2.5 to 3.5 small colored flakes can be blended into a paint for forming a multicolored pattern. In this case, a mixture of large, medium, and small colored flakes in a predetermined ratio may be prepared in advance.

[0057] The blending ratio of the first color flakes and the second color flakes is not particularly limited and can be adjusted appropriately depending on the design of the desired multicolored coating film. The combined blending amount of the first color flakes and the second color flakes (total blending amount of color flakes) is also not particularly limited. For example, it can be 20 to 60% by weight of the paint solids. The total blending amount of color flakes is preferably 30 to 55% by weight of the paint solids, more preferably 35 to 50% by weight of the paint solids.

[0058] The blending ratio of the lustrous material is not particularly limited, but it is preferably blended so that it is contained in an amount of 0.5 to 5.0 wt % of the solid content of the paint for forming a multicolor pattern. Even when the blending amount of the lustrous material is relatively small, the paint for forming a multicolor pattern of the present invention can form a multicolor pattern coating film that is excellent in a dazzling, powerful lustrous feeling.

[0059] The paint for forming the multicolored pattern may contain various fillers such as colored beads and mica, as long as they do not significantly impair weather resistance or workability. Furthermore, various additives such as matting agents such as silica and acrylic beads, leveling agents, and dispersants may also be added.

[0060] 4. Method for forming a coating of paint for forming a multicolored pattern The coating material for forming the multicolored pattern thus obtained can be applied directly to the surface to be coated, such as an exterior wall, but it is preferable to apply it to the surface of a base coating film that has been formed after applying a base coating. Examples of exterior walls include panels made of concrete, lightweight aerated concrete (ALC), extruded cement boards, gypsum boards, ceramic sanding, metal siding, and resin siding. These panels can have smooth or recessed surfaces. By forming a multicolored pattern coating on the surface of these panels, a dazzling, powerful shine can be achieved. In particular, when a coating is formed on a recessed panel, it becomes easier to achieve a multicolored pattern coating that takes advantage of the three-dimensional effect of the recessed surface.

[0061] A preferred method for forming a film of a paint for forming a multicolored pattern is one that includes an enamel coating film forming step in which an enamel paint is applied to the surface of a surface to be painted, such as an exterior wall, to form a base coating film, and a multicolored pattern coating film forming step in which a paint for forming a multicolored pattern is applied to the surface of the enamel coating film formed in the enamel coating film forming step to form a film. The enamel coating film serves as the base coating film. The enamel coating applied to the surface of the surface to be painted conceals defects such as dirt and cracks on the surface and also provides protection from ultraviolet rays, etc., and the paint for forming colorful patterns applied to the surface of the enamel coating ensures high designability. [Example]

[0062] The present invention will now be described in detail with reference to examples, but the present invention is not limited to these examples. In the examples, the ratios and the like are based on weight.

[0063] Example 1 In Example 1, white colored flakes were used as the first colored flakes, and gray colored flakes were used as the second colored flakes.

[0064] 1. Preparation of the first colored flakes and the second colored flakes 1) Preparation of liquid raw materials Based on the formulation in Table 1 below, a white liquid raw material that will be the basis for the first colored flakes and a gray liquid raw material that will be the basis for the second colored flakes were prepared. An acrylic silicone resin (Asahi Kasei Corporation's "Polydurex G-625") was used as the resin, and this was dispersed in water to form an acrylic resin emulsion. Titanium oxide (Teika Corporation's JR-701) and yellow iron oxide (Toyocolor Corporation's Liofast Ochre RD-230) were used as color pigments, and calcium carbonate (Toyo Fine Chemical Co., Ltd.'s Whiten H) was used as the extender pigment.

[0065] (Table 1) Liquid raw material composition table TIFF0007778308000001.tif73162

[0066] 2) Film formation and pulverization of liquid raw materials Each of the two liquid materials obtained was applied to a Teflon sheet using a film applicator so that the dried film thickness was 75±15 μm, and then dried to form a dried coating film. The resulting dried coating film was peeled off from the Teflon sheet and finely pulverized using a pulverizer to obtain a white pulverized material (first colored flakes) and a gray pulverized material (second colored flakes).

[0067] 3) Classification of crushed material In this example, the two types of pulverized products (colored flakes) obtained were sieved and classified into large-diameter colored flakes, medium-diameter colored flakes, and small-diameter colored flakes.

[0068] Specifically, for each of the two types of pulverized material (colored flakes), those that passed through a sieve with a mesh size of 2.38 mm but not through a sieve with a mesh size of 1.30 mm were designated large-diameter colored flakes, those that passed through a sieve with a mesh size of 1.09 mm but not through a sieve with a mesh size of 0.544 mm were designated medium-diameter colored flakes, and those that passed through a sieve with a mesh size of 0.544 mm were designated small-diameter colored flakes.

[0069] 2. Bright material The luminous material used was glass flakes with a surface treatment of the surface with titanium oxide (Metashine GT5600RS, manufactured by Nippon Sheet Glass Co., Ltd.). The thickness of the glass flakes used as the luminous material was approximately 5 μm. The average particle size of the luminous material was approximately 600 μm. Furthermore, 50% by weight or more of the luminous material was too large to pass through a sieve with a mesh size of 300 μm.

[0070] 3. Binder resin An acrylic silicone resin (Polydurex G-625, manufactured by Asahi Kasei Corporation) was used as the binder resin for the paint used to form the multicolored pattern. An emulsion resin solution (solid content 45% by weight) was prepared using this resin, and this was used as the binder resin solution.

[0071] 4. Manufacturing of paints for forming multicolor patterns A paint was made according to the formulation of Example 1 in Table 2 using the above emulsion resin solution, the first colored flakes, the second resin flakes and the luster material.

[0072] (Table 2) Paint formulation and evaluation results TIFF0007778308000002.tif226140

[0073] A film was formed on the surface of an ALC panel that had been engraved with the obtained paint for forming a multicolored pattern of Example 1. Specifically, a normal enamel paint was applied to the surface of the ALC panel that had been engraved to form a film, and then the paint for forming a multicolored pattern was spray-painted onto that surface.

[0074] The resulting coatings were evaluated for brilliance, regular reflectivity (mirror reflectivity), and the highlighting effect of the embossed finish. Brilliance was determined by visually observing the sparkle of the coating due to the luminous material. Regular reflectivity is an index used to evaluate the dazzling, powerful brilliance of the coating, and was determined by visually observing the sparkle of the luminous material when the coated board was illuminated with regular reflected light (the coating was placed at a 45° angle in a standard light booth, light source D65). The highlighting effect of the embossed finish was determined by visually observing the degree of unevenness on a coated board with embossed finish. Each evaluation was carried out by 5 to 10 people, and the case where 80% or more of the evaluators judged it to be good was evaluated as ⊚, the case where 50% or more but less than 80% judged it to be good was evaluated as ○, the case where 20% or more but less than 50% judged it to be good was evaluated as △, and the case where less than 20% judged it to be good was evaluated as ×. The evaluations in each of the examples and comparative examples described later were also carried out in the same manner.

[0075] The resulting multicolored patterned coating film had good brilliance. It also had good regular reflectivity, giving it a strong, dazzling shine. The effect of highlighting the recessed pattern was also excellent, and the recessed pattern on the ALC panel being coated was utilized, resulting in a good three-dimensional effect.

[0076] (Example 2) (Example 3) (Example 4) These examples are blending systems in which the amount of glass flake-based luster material is increased in the blending of Example 1. Note that these examples differ from Example 1 in that not only medium-sized first colored flakes but also large and small-sized first colored flakes are blended with the second colored flakes.

[0077] A paint was made using the formulation of each example in Table 2, and as in Example 1, a film was formed on the surface of an ALC panel with a recessed finish, and the brilliance, regular reflectivity, and the effect of highlighting the recessed finish were evaluated.

[0078] The resulting multicolored coating films were excellent in all of brilliance, regular reflectivity, and the effect of highlighting the recessed pattern in Examples 2 and 3. Example 4 was excellent in brilliance and regular reflectivity, and also had a good effect of highlighting the recessed pattern.

[0079] (Example 5) (Example 6) (Example 7) (Example 8) These examples are blending systems in which the average particle size of the glass flake-based luster material is varied in the blending of Example 2. Luster materials with an average particle size of 20 μm, 80 μm, 230 μm, and 480 μm were used, respectively.

[0080] A paint was prepared using the formulation of each example in Table 2 and evaluated in the same manner as in Example 1.

[0081] All of the resulting multicolored pattern coating films had excellent brilliance. Furthermore, all of them had good or better specular reflectivity, and it was found that the use of a brilliance material with a particularly large average particle size resulted in excellent specular reflectivity and a brilliant, powerful brilliance. Furthermore, all of them had a good effect of highlighting the recessed pattern. In particular, Example 8, which used a brilliance material with an average particle size of 480 μm, had an excellent effect of highlighting the recessed pattern, similar to Example 2, which used a brilliance material with an average particle size of 600 μm.

[0082] (Example 9) (Example 10) (Example 11) These examples are blends of the first colored flakes, the second colored flakes, and the third colored flakes (black). Example 9 uses a luster material based on glass flakes with an average particle size of 600 μm, Example 10 adds a luster material based on glass flakes with an average particle size of 20 μm, and Example 11 adds a pearl luster material.

[0083] The formulation of the black liquid raw material that forms the basis of the third colored flakes is shown in Table 1. Carbon black (Lyofast Black M-232A, manufactured by Toyocolor Co., Ltd.) was used as the color pigment, and calcium carbonate, the same as that used in Example 1, was used as the extender pigment. Furthermore, a mica base material coated with titanium dioxide and having a particle size of 15 to 150 μm was used as the pearlescent material.

[0084] Then, in the same manner as in Example 1, the liquid raw material (black liquid raw material) was subjected to film formation and pulverization, and the pulverized material was classified to obtain third colored flakes.

[0085] The obtained third colored flakes were used to prepare paints according to the formulations of the respective examples shown in Table 2, and the paints were evaluated in the same manner as in Example 1.

[0086] The resulting multicolored coating films of Examples 9 and 10 were excellent in brilliance, regular reflectivity, and the effect of highlighting the recessed pattern. Example 11, which contained a small amount of pearlescent pigment, had good brilliance, regular reflectivity, and the effect of highlighting the recessed pattern.

[0087] (Comparative Example 1) (Comparative Example 2) (Comparative Example 3) These comparative examples are formulations using conventional colored gel particles (colored polymer particles). Comparative Examples 1 and 2 use only conventional colored gel particles without using colored flakes, and Comparative Example 3 is a formulation using both colored flakes and conventional colored gel particles.

[0088] In this example, white and gray colored gel particles were used. Colored gel particles themselves are well known and can be obtained by various known techniques. The colored gel particles used in this example will be described below.

[0089] First, a thermosensitive gelling emulsion composition having the composition shown in Recipe a) in Table 3 below and an aqueous medium having the composition shown in Recipe b) were prepared by uniformly mixing the components. Asahi Kasei's Polydurex X1767 was used as the silicone-modified acrylic resin emulsion. Asahi Kasei's Hardener A12 was used as the aqueous ammonia solution of the zinc compound. The aqueous medium was then heated to 70°C, and the thermosensitive gelling emulsion composition was added dropwise over approximately 60 minutes while stirring (500 rpm). After the addition was complete, stirring was continued for 10 minutes while heating to maintain the temperature at 70°C. 30 minutes after the end of heating, stirring was stopped and the mixture was allowed to cool, yielding colored gel particles.

[0090] (Table 3) Colored gel particle formulation TIFF0007778308000003.tif97167

[0091] The resulting gel particles were then sieved to classify them into large, medium and small sized colored gel particles.

[0092] Specifically, for each of the two types of colored gel particles, those that passed through a sieve with a mesh size of 2.38 mm but not through a sieve with a mesh size of 1.30 mm were designated large-diameter colored gel particles, those that passed through a sieve with a mesh size of 1.09 mm but not through a sieve with a mesh size of 0.544 mm were designated medium-diameter colored gel particles, and those that passed through a sieve with a mesh size of 0.544 mm were designated small-diameter colored gel particles.

[0093] Each comparative example in Table 2 was formulated into a paint, and in the same manner as in Example 1, a film was formed on the surface of an ALC panel with a recessed finish, and the brilliance, regular reflectivity, and the effect of highlighting the recessed finish were evaluated.

[0094] The multicolored coating films obtained in all comparative examples had excellent brilliance. However, comparative examples 1 and 2 had problems with regular reflectivity and the effect of highlighting the recessed pattern. Comparative example 3 also had good regular reflectivity, but had problems with the effect of highlighting the recessed pattern.

[0095] Comparative Example 4 This is a blend system using colored gel particles as in Example 1, and a pearlescent material as the lustrous material.

[0096] The resulting multicolored coating film had issues with glitter, regular reflectivity, and the highlighting effect of the recessed pattern.

[0097] (Comparative Example 5) This is a blending example in which the same materials as in Example 1 are used, but the blending amount of the luster material is reduced.

[0098] The resulting multicolored pattern coating film had poor brilliance and had problems with regular reflectivity and the highlighting effect of the recessed pattern.

[0099] (Comparative Example 6) This is a blending example in which the same materials as in Example 1 are used, but the blending amount of the luster material is increased.

[0100] The resulting multicolored pattern coating film had excellent brilliance and regular reflectivity, but there was a problem with the highlighting effect of the recessed pattern.

[0101] The present invention has been described above with reference to specific embodiments and examples, but the present invention is not limited to the above embodiments, and various changes and modifications can be made by those skilled in the art without departing from the scope of the claims attached to the application of this application.

Claims

1. A binder resin, a first colored flake; a second colored flake having a different color tone from the first colored flake; A glittering material based on glass flakes, A paint for forming a multicolor pattern, The first color flake and the second color flake are The thickness is 150 μm or less, The glitter material is The solid content of the paint for forming the multicolor pattern is 0.5 to 5.0% by weight. Paint for forming multicolored patterns.

2. The first color flake and the second color flake are Including those that do not pass through a sieve with a mesh size of 1.3 mm. The paint for forming a multicolor pattern according to claim 1.

3. The lustrous material has an average particle size of 15 to 800 μm. The paint for forming a multicolor pattern according to claim 1 or 2.

4. The glittering material has a glass flake substrate having a thickness of 0.1 to 10 μm. The paint for forming a multicolor pattern according to any one of claims 1 to 3.

5. The first color flake and the second color flake are Contains acrylic silicone resin and pigment. The paint for forming a multicolor pattern according to any one of claims 1 to 4.

6. A binder resin, a first colored flake; a second colored flake having a different color tone from the first colored flake; A glittering material based on glass flakes, The first color flake and the second color flake are The thickness is 150 μm or less and does not pass through a sieve with an opening size of 1.3 mm, The glitter material is The average particle size is 15 to 800 μm and the thickness is 0.1 to 10 μm, The lustrous material is The solid content of the paint for forming a multicolor pattern is 0.5 to 5.0% by weight. Paint for forming multicolored patterns.

7. An enamel coating film forming process in which enamel paint is applied to the surface of the surface to be painted, such as an exterior wall, to form a film; a multicolored pattern coating film forming step of applying a coating material for forming a multicolored pattern according to any one of claims 1 to 6 to the surface of the enamel coating film formed in the enamel coating film forming step to form a film; A method for forming a coating film of a paint for forming a multicolor pattern, comprising:

8. A multicolored pattern coating film is formed using the paint for forming a multicolored pattern according to any one of claims 1 to 6. Painted items.

9. A multicolored pattern coating film is formed on the surface side of a panel using the paint for forming a multicolored pattern according to any one of claims 1 to 6. Painted items.

10. A binder resin, a first colored flake; a second colored flake having a different color tone from the first colored flake; A paint-making process is provided in which the paint is made by mixing the glass flake-based luminous material with the paint. A method for producing a paint for forming a multicolor pattern, The first color flake and the second color flake are The thickness is 150 μm or less, In the paint production process, The lustrous material is The paint is formulated so that the content of the colorant in the solid content of the paint for forming the multicolor pattern is 0.5 to 5.0 wt %. A method for manufacturing paint for forming multicolor patterns.

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