Painted products and their manufacturing methods

Abstract

To obtain a painted product that has a three-dimensional appearance while making the most of the design features of multi-colored patterned paints, even without containing large particles. [Solution] In a painted object comprising a workpiece, a base coat film formed on at least a part of the surface of the workpiece, and a multi-color patterned coating film formed on the base coat film, a multi-color patterned coating film is formed by applying a multi-color patterned paint, which is formulated with gel-like particles that are different but similar in color to the base coat film, onto the base coat film so that the base coat film is visible through the gaps between the overlapping gel-like particles.

Description

[Technical Field]

[0001] This invention relates to a painted product and a method for manufacturing the same. [Background technology]

[0002] The surfaces of objects such as wall materials are often coated with paint for protection or decoration. Paints used for this purpose include those in which gel-like colored particles, encapsulated in a gel film, are dispersed in a dispersion medium. Emulsion paints belong to the water-based paint category and have higher environmental compatibility compared to conventional solvent-based paints. Furthermore, by encapsulating the emulsion paint with a gel film, the colored particles are stably dispersed in the dispersion medium. Therefore, by using several types of emulsion paints, a multi-colored paint with a mixture of colored particles of different shades can be created, forming a multi-colored paint film.

[0003] On the other hand, in recent years, there has been a demand for paints that can form a three-dimensional coating in order to create a more substantial and robust design. For example, Patent Document 1 proposes a paint that can form a coating film with an uneven surface, which contains aggregates with a particle size of 100 μm or more (e.g., silica sand, glass, silica, alumina, talc, clay, etc.).

[0004] However, as described in Patent Document 1, paints containing aggregates had inferior aesthetic appeal because the aggregates were exposed on the surface of the paint film. Moreover, the aggregates were prone to falling off the surface of the paint film, making it difficult to maintain the three-dimensional appearance of the paint film. Therefore, Patent Document 2 proposes a three-dimensional pattern paint composition containing a multi-color pattern paint and foamed resin powder.

[0005] According to the invention of Patent Document 2, since it contains foamed resin powder with large particle size, a coating film with a three-dimensional feel can be formed. Moreover, the foamed resin powder is easily covered by the multi-colored pattern paint and is not easily exposed on the surface of the coating film. Therefore, a coating film with excellent design can be formed, and the foamed resin powder is not easily detached from the surface of the coating film. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2009-263425 [Patent Document 2] Japanese Patent Publication No. 2015-071732 [Overview of the project] [Problems that the invention aims to solve]

[0007] The method described in Patent Document 2 allows for a three-dimensional appearance while preserving the design appeal of multi-colored patterned paints. However, because it uses foamed resin powder with large particle sizes, it is difficult to avoid particle shedding after the coating dries. In view of the above circumstances, the present invention aims to provide a painted product that can obtain a three-dimensional appearance while making use of the design properties of multi-color patterned paints, even without containing large particles. [Means for solving the problem]

[0008] To solve the above problems, the present invention employs the following configuration. [1] comprising an object to be coated, a base coat film formed on at least a part of the surface of the object to be coated, and a multi-color patterned coating film formed on the base coat film, The aforementioned multi-color patterned coating film is a coating film formed from a multi-color patterned coating containing multiple types of gel-like particles in which emulsion coating is encapsulated within a gel film. The multiple types of gel-like particles contained in the aforementioned multi-colored paint include gel-like particles (X) whose Hunter Lab value of the paint film formed from the contained emulsion paint satisfies both of the following formulas (1) and (2), and gel-like particles (Y) that do not satisfy at least one of the following formulas (1) and (2). The ratio of the gel particles (X) to the total amount of the gel particles (Y) is 5 to 50% by mass. A coated article in which the area where the base coating film can be visually recognized between the plurality of types of gel-like particles constituting the multi-colored pattern coating film is 3 to 60% of the total area of the base coating film under the multi-colored pattern coating film. 10 ≦ |ΔL| ≦ 30 ··· Formula (1) 0 ≦ Δab ≦ 8 ··· Formula (2) However, ΔL = L1 - L2 Δab = ((a1 - a2) 2 + (b1 - b2) 2 ) 1 / 2 L1 is the lightness of the base coating film, L2 is the lightness of the coating film formed from the emulsion paint encapsulated in the gel-like particles, a1 and b1 are the chromaticities of the base coating film, and a2 and b2 are the chromaticities of the coating film formed from the emulsion paint encapsulated in the gel-like particles.

[0009] [2] A method for manufacturing a coated article, comprising coating a base coating material on at least a part of the surface of an object to be coated to form a base coating film, and coating a multi-colored pattern coating material on the obtained base coating film to form a multi-colored pattern coating film, The multi-colored pattern coating material contains a plurality of types of gel-like particles in which an emulsion paint is encapsulated in a gel film, The plurality of types of gel-like particles contained in the multi-colored pattern coating material include gel-like particles (X) in which the Hunter Lab value of the coating film formed from the encapsulated emulsion paint satisfies both of the following formula (1) and the following formula (2), and gel-like particles (Y) that do not satisfy at least one of the following formula (1) and the following formula (2), The ratio of the gel-like particles (X) to the total amount of the gel-like particles (X) and the gel-like particles (Y) is 5 to 50% by mass, A method for manufacturing a coated article, wherein the multi-colored pattern coating material is applied so that the area where the base coating film can be visually recognized between the plurality of types of gel-like particles constituting the multi-colored pattern coating film is 3 to 60% of the total area of the base coating film under the multi-colored pattern coating film. 10 ≦ |ΔL| ≦ 30 ··· Formula (1) 0 ≦ Δab ≦ 8 ··· Formula (2) However, ΔL = L1 - L2 Δab = ((a1 - a2) 2 + (b1 - b2) 2 ) 1 / 2 L1 is the lightness of the base coating film, L2 is the lightness of the coating film formed from the emulsion paint encapsulated in the gel particles, a1 and b1 are the chromaticities of the base coating film, and a2 and b2 are the chromaticities of the coating film formed from the emulsion paint encapsulated in the gel particles.

Advantages of the Invention

[0010] According to the coated object and its manufacturing method of the present invention, a coated object with a three-dimensional appearance can be obtained while making use of the design property of the multicolor pattern paint without containing particles with a large particle size.

Modes for Carrying Out the Invention

[0011] In this specification and the claims, "~" indicating a numerical range means including the numerical values described before and after it as the lower limit value and the upper limit value. The coated object of this embodiment includes a substrate to be coated, a base coating film formed on at least a part of the substrate to be coated, and a multicolor pattern coating film formed on the base coating film.

[0012] <Substrate to be coated> The substrate to be coated is typically a wall material. Examples of substrates to be coated such as wall materials include mortar, ceramic siding, ALC (lightweight cellular concrete), tiles, and laminates in which mortar is laminated on the surface of a base material (such as ceramic siding). The surface on which the coating film of the substrate to be coated is formed is basically a flat surface, but in order to enhance the design property, unevenness may be formed. For example, a coating film may be formed on a surface where decorative grooves are provided to raise the height of the parts other than the decorative grooves (design parts) to enhance the three-dimensional effect.

[0013] The primers described later may be applied directly onto these substrates, or they may be applied over primers, sealers, etc., to improve the adhesion of the paint film to the substrate or to prevent the substrate from absorbing the paint. Examples of sealers include water-based sealers, organic solvent-based sealers, and solvent-free sealers. The resin used in the primer or sealer can be the same resin used in the multi-color paint described later. It may also contain other components, such as additives similar to those used in the multi-color paint described later.

[0014] <Undercoat> The undercoat is formed on at least a portion of the surface of the object to be coated. That is, the undercoat is formed on a portion or all of the surface of the object to be coated. The primer film is a coating formed from the primer paint. The primer paint can be any type of paint that serves a coloring purpose, but typically it contains a resin, a coloring component, and other components as needed, in an aqueous medium.

[0015] As the aqueous medium, the same aqueous medium as the dispersion medium used in the multi-color pattern paint described later can be used. As the resin, the same aqueous resin as the resin used in the multi-color pattern paint described later can be used. In particular, it is preferable to include an acrylic paint in order to ensure good adhesion with the multi-color pattern paint. Coloring components include coloring pigments and dyes, but coloring pigments are preferred in terms of weather resistance. As coloring pigments, those similar to the pigments contained in the gel-like particles in the multi-color pattern paint described later can be used. Other components include decorative materials and additives used in the multi-color paints described later.

[0016] <Multicolored patterned coating> A multi-color patterned coating is a coating formed from a multi-color patterned paint containing multiple types of gel-like particles with different color tones. Preferably, the multi-color patterned paint contains a binder resin and a dispersion medium in addition to the gel-like particles. It may also contain various additives.

[0017] [Gel-like particles] The plurality of types of gel particles contained in the colorful pattern paint of this embodiment are particles in which an emulsion paint is encapsulated in a gel film. The plurality of types of gel particles include gel particles (X) whose colorimetric result based on JIS Z 8741-4:2013 of the coating film formed from the encapsulated emulsion paint satisfies both the following formula (1) and the following formula (2), and gel particles (Y) that do not satisfy at least one of the following formula (1) and the following formula (2).

[0018] 10≦|ΔL|≦30 ··· Formula (1) 0≦Δab≦8 ··· Formula (2)

[0019] However, ΔL = L1 - L2 Δab = ((a1 - a2) 2 +(b1 - b2) 2 ) 1 / 2 L1 is the lightness of the base coating film, L2 is the lightness of the coating film formed from the emulsion paint encapsulated by the gel particles, a1 and b1 are the chromaticities of the base coating film, and a2 and b2 are the chromaticities of the coating film formed from the emulsion paint encapsulated by the gel particles.

[0020] The colorimetry of the base coating film and the colorimetry of the coating film formed from the emulsion paint encapsulated by the gel particles are performed by forming each coating film on the same type of base material so that the surface of the base material is completely hidden. Specifically, it follows the method described in the examples below.

[0021] The ratio of the gel particles (X) to the total amount of the gel particles (X) and the gel particles (Y) is 5 to 50% by mass, preferably 10 to 40% by mass, and more preferably 20 to 35% by mass. When the ratio of the gel particles (X) is 5 to 50% by mass, a three-dimensional appearance can be obtained.

[0022] The gel-like particles in the multi-color patterned paint can take on various shapes, such as flake-like (which can also be described as flaky, flat, plate-like, or thin flake-like), spherical, cubic, or linear. Among these, flake-like or spherical particles are preferred, and flake-like particles are particularly preferred, from the standpoint of productivity, ease of application, and good design.

[0023] In this invention, "flake-shaped" means a shape having opposing first and second surfaces and an aspect ratio of 2 or more. The aspect ratio can be determined by (major axis ÷ thickness). In the case of a flake-shaped shape, the major axis means the longer of the distance between the two farthest points on the outer circumference of the first surface and the distance between the two farthest points on the outer circumference of the second surface. In the case of a flake-shaped shape, the thickness means the distance between the farthest parts of the first surface and the second surface. There are no particular limitations on the shapes of the opposing first and second faces; various shapes such as circles, ellipses, triangles, and quadrilaterals can be used. They are usually circular or elliptical.

[0024] When the gel-like particles contained in the multi-colored paint are flake-shaped, the average length of the particles is preferably 500 μm or more, more preferably 1,000 μm or more. Furthermore, it is preferably 10 mm or less, and more preferably 8 mm or less. If the average of the major axis of the gel-like particles falls within the above range, the shadows of the gel-like particles will be more pronounced.

[0025] When the gel-like particles contained in the multi-color patterned paint are flake-shaped, the average thickness is preferably 5 μm or more, more preferably 50 μm or more, and most preferably 100 μm or more. Furthermore, it is preferably 1000 μm or less, more preferably 500 μm or less, and most preferably 300 μm or less. If the average thickness is above a desirable lower limit, the color of the gel-like particles is more easily reflected in the coating. If the average thickness is below a desirable upper limit, the average aspect ratio is more easily kept below a desirable upper limit.

[0026] When the gel-like particles contained in the multi-color patterned paint are flake-shaped, the average aspect ratio (average length of major axis ÷ average thickness) is preferably 2 to 500, and more preferably 5 to 200. When the average aspect ratio is below a preferred upper limit, it is easier to orient the gel-like particles in the resulting coating film, and the color of those gel-like particles is more easily reflected in the coating film. When the average aspect ratio is above a preferred lower limit, the adhesion of the gel-like particles to the substrate is improved, and the color of those gel-like particles is more easily reflected in a wide range of coating films.

[0027] In this invention, "spherical" refers to a three-dimensional shape that does not have faces that can be clearly divided by line segments, such as a cube or a triangular pyramid, and has an aspect ratio of less than 2. The aspect ratio can be calculated by (major axis ÷ minor axis). In the case of a spherical particle, the major axis refers to the distance between the two points on the outer surface of the gel-like particle that are far apart (the straight-line distance between the two points, not the distance along the outer circumference), and the minor axis refers to the distance between the two points on the outer surface of the particle that are closest to each other (the straight-line distance between the two points, not the distance along the outer circumference), which corresponds to the thickness in the case of a flake-like particle.

[0028] When the gel-like particles in the multi-color patterned paint are spherical, the average length of the particles is preferably 500 μm or more, and more preferably 1 mm or more. Furthermore, the average length of the particles is preferably 5 mm or less, and more preferably 4 mm or less. If the average of the major axis of the gel-like particles falls within the above range, the shadows of the gel-like particles will be more pronounced.

[0029] The average values ​​of the major axis and thickness when the gel-like particles are flake-shaped, and the average values ​​of the major axis and minor axis when the gel-like particles are spherical, are obtained by randomly selecting 20 gel-like particles from the multi-color patterned paint and taking the arithmetic mean of the individual measurements taken with a ruler or microscope.

[0030] The gel-like particles consist of droplets in which at least a coloring pigment is dispersed, and a gelling film covering the surface of the droplets. The gelling film has a three-dimensional network structure. In addition to the dispersed coloring pigment, the droplets may also contain various raw material components, such as unreacted colloid-forming substances and gelling agents, as described later in the method for producing the gel-like particle dispersion.

[0031] The proportion of gel-like particles in the multi-color patterned paint (excluding the dispersion medium on the outside of the gel-like particles) is preferably 5 to 70% by mass, and more preferably 7 to 55% by mass. When the proportion of gel-like particles is above the lower limit of the preferred range, the coating film exhibits excellent weather resistance and other performance characteristics. When it is below the upper limit of the preferred range, the paint application is easy to apply.

[0032] [Method for producing a gel-like particle dispersion] A gel-like particle dispersion containing gel-like particles can be produced by reacting an emulsion paint in which at least a coloring pigment and a colloid-forming substance are dispersed in a dispersion medium with a gelling agent solution containing at least a gelling agent. The emulsion paint preferably contains a resin.

[0033] Examples of coloring pigments include inorganic pigments such as carbon black, titanium dioxide, iron oxide, lead chromate, cadmium yellow, and cadmium red; organic pigments such as phthalocyanine blue, phthalocyanine green, and quinacridone red; and colored resin chips. These may be used individually or in combination of two or more types.

[0034] The average particle size of the coloring pigment is preferably 10 to 1000 nm, and more preferably 10 to 800 nm. When the average particle size of the coloring pigment is above the lower limit, the color of the coloring pigment is more easily reflected in the color of the gel-like particles. When the average particle size of the coloring pigment is below the upper limit, it is easier to stably disperse it in the dispersion medium. The average particle size of the coloring pigment is the median diameter (50% cumulative particle diameter) value calculated from the volume-average diameter measured by laser diffraction / scattering.

[0035] The proportion of colored pigment in the gel-like particles is preferably 1 to 70% by mass, more preferably 2 to 60% by mass, and particularly preferably 3 to 55% by mass. A proportion of colored pigment above the lower limit of the preferred range results in excellent opacity. A proportion below the upper limit of the preferred range results in excellent coating film performance, such as water resistance.

[0036] The colloid-forming material can be any material capable of forming a gelled film upon reaction with a gelling agent. Examples of colloid-forming materials include cellulose derivatives, polyethylene oxide, polyvinyl alcohol, and natural polymers such as casein, starch, galactomannan, guar gum, and locust bean gum. These colloid-forming materials may be used individually or in combination of two or more. The content of colloid-forming material (dry solids) is preferably 0.1 to 20% by mass, and more preferably 0.5 to 15% by mass, relative to the total emulsion paint.

[0037] As described above, the gelling agent reacts with the colloid-forming material and crosslinks to form a gelled film containing a three-dimensional network structure. Examples of gelling agents include montmorillonite, bentonite, tannic acid, borate, aluminum salt, barium salt, calcium salt, and magnesium salt. These gelling agents may be used individually or in combination of two or more. The gelling agent (dry solids) content is preferably 0.1 to 20% by mass, and more preferably 0.5 to 15% by mass, relative to the total gelling agent solution.

[0038] The ratio of the gelling agent (dry solids) to the colloid-forming substance (dry solids) is preferably in the range of 3:1 to 1:3, and more preferably in the range of 2:1 to 1:2. By keeping the amount of gelling agent (dry solids) used relative to the colloid-forming substance (dry solids) within the above range, a stable gelled film can be obtained.

[0039] The resin is an aqueous resin that can be dissolved or dispersed in an aqueous medium. A resin that can be dispersed in an aqueous medium (aqueous dispersible resin) is preferred as the aqueous resin. By incorporating resin into the emulsion paint, it is possible to obtain gel-like particles that do not easily lose their shape during painting.

[0040] There are no particular restrictions on the type of water-based resin; it can be selected appropriately according to the performance required for the coating film. Examples of resin types include acrylic resin, urethane resin, vinyl acetate resin, silicone resin, fluororesin, acrylic urethane resin, acrylic silicone resin, acrylic fluororesin, acrylic styrene resin, acrylonitrile resin, vinyl chloride resin, epoxy resin, beova (branched fatty acid vinyl ester), natural rubber, synthetic rubber, and copolymers thereof.

[0041] These water-based resins may be used individually or in combination of two or more. Among them, synthetic resins such as acrylic resins, acrylic silicone resins, and acrylic fluororesins are preferred due to their excellent weather resistance and water resistance. The resin content is preferably 5 to 70% by mass, and more preferably 10 to 50% by mass, relative to the total amount of the emulsion coating.

[0042] Extender pigments may be used as raw materials to obtain a gel-like particle dispersion. Extender pigments are a general term for achromatic pigments used in paints. Examples of extender pigments include kaolin, barium sulfate, hydrated magnesium silicate, and calcium carbonate. Extender pigments may be used individually or in combination of two or more. The extender pigment may be incorporated into either the emulsion paint or the gelling agent solution.

[0043] Other design materials and additives besides coloring pigments may be used as raw materials to obtain a gel-like particle dispersion. Examples of decorative materials include lustrous pigments, aggregates, and matte beads. Examples of lustrous pigments include pearl pigments, mica pigments, mica-coated pearl pigments, aluminum powder, and stainless steel powder.

[0044] Examples of additives include emulsifiers, pH adjusters, defoamers, viscosity modifiers, film-forming aids, freeze inhibitors, dispersants, wetting agents, penetration aids, preservatives, surface modifiers, UV absorbers, antioxidants, and heat shielding agents. Other design materials and additives besides coloring pigments may be incorporated into either the emulsion paint or the gelling agent solution.

[0045] The dispersion medium for emulsion coatings is water alone, or an aqueous medium in which a water-compatible solvent is added to water. The proportion of water in the aqueous medium is preferably 50% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more. For the water used, deionized water or tap water can be used. Examples of solvents compatible with water include alcohols such as ethanol and isopropyl alcohol, and ethylene glycol. The solvent used in the gelling agent solution can be the same as the dispersion medium used in emulsion paints.

[0046] [Binder resin] The binder resin may consist solely of a resin derived from the gel-like particle dispersion, solely of a resin compounded separately from the gel-like particle dispersion, or a combination of a resin derived from the gel-like particle dispersion and a resin compounded separately from the gel-like particle dispersion.

[0047] As the binder resin to be added separately from the gel-like particle dispersion, an aqueous resin similar to the resin listed as a raw material for the gel-like particle dispersion can be used. Since the separately added binder resin exhibits excellent elasticity of the coating film, it is preferable that its dispersion form and type are the same as the resin used as a raw material for the gel-like particle dispersion. As an example, both the separately added binder resin and the raw material resin for the gel-like particle dispersion may be acrylic silicone resins that can be dispersed in an aqueous medium. An example where the binder resin and the raw material resin of the gel-like particle dispersion are different is when the binder resin is acrylic silicone resin and the raw material resin of the gel-like particle dispersion is acrylic resin.

[0048] The proportion of binder resin (including the resin inside the gel-like particles) in the multi-color pattern paint is preferably 7 to 70% by mass, and more preferably 10 to 70% by mass. When the proportion of binder resin is above the lower limit of the preferred range, the coating film exhibits excellent weather resistance and other performance characteristics. When it is below the upper limit of the preferred range, the paint application is easy to apply.

[0049] The additives may consist solely of additives derived from the gel-like particle dispersion, solely of additives formulated separately from the gel-like particle dispersion, or a combination of additives derived from the gel-like particle dispersion and additives formulated separately from the gel-like particle dispersion. The additives used in multi-color patterned paints can be the same as those used in the resins listed as raw materials for gel-like particle dispersions. Multi-color patterned paints may contain unreacted colloid-forming substances or gelling agents (raw materials for gel-like particle dispersions).

[0050] The dispersion medium for multi-color patterned paints preferably includes a dispersion medium derived from a gel-like particle dispersion, as well as a dispersion medium formulated separately from the gel-like particle dispersion. As a dispersion medium to be added separately from the dispersion medium derived from the gel-like particle dispersion, an aqueous medium similar to the dispersion medium listed as a raw material for the gel-like particle dispersion can be used.

[0051] The dry solid content concentration of the multi-color pattern paint is preferably 15 to 80% by mass, and more preferably 25 to 70% by mass. When the dry solids content of the multi-color patterned paint is above a preferred lower limit, it exhibits excellent coating performance such as weather resistance. When it is below a preferred upper limit, it results in good paint application workability.

[0052] The viscosity of multi-color patterned paint at 23°C, measured with a Type B viscometer (TVB-10, manufactured by Toki Sangyo Co., Ltd.), is preferably 10 to 200 Pa·s, and more preferably 30 to 150 Pa·s. When the viscosity of the multi-colored paint is above a desirable lower limit, dripping during painting is less likely to occur. When it is below a desirable upper limit, painting is easier and the finished appearance is better.

[0053] [Area ratio] The multi-color patterned coating is formed on the base coating such that the area in which the base coating is visible through the multiple types of gel-like particles constituting the multi-color patterned coating is 3 to 60% of the total area of ​​the base coating beneath the multi-color patterned coating. Preferably, the area in which the base coating is visible is 10 to 45% of the total area of ​​the base coating beneath the multi-color patterned coating, and more preferably 20 to 30%.

[0054] By ensuring that the visible area of ​​the base coat is 3-60% of the total surface area of ​​the base coat beneath the multi-colored patterned coating, a three-dimensional appearance can be achieved. The percentage of the area where the undercoat is visible is the percentage of the area where the undercoat is visible from between the multiple types of gel-like particles that make up the multi-color patterned coating. It is also the percentage of the total area of ​​the undercoat beneath the multi-color patterned coating. Therefore, if there are areas on the base coat where the multi-colored patterned coating has not been formed, or if there are areas where the multi-colored patterned coating has been formed on areas where there is no base coat, those areas will not be taken into consideration.

[0055] <Method of manufacturing painted objects> The method for manufacturing a painted object in this embodiment involves applying a primer to at least a portion of the surface of the object to be painted to form a primer film, and then applying a multi-color patterned paint on the obtained primer film to form a multi-color patterned film. In the manufacturing method of the painted object of this embodiment, a primer or sealer may be applied to the surface of the object to be painted before applying the base coat.

[0056] [Application of primer or sealer] The method of applying the primer or sealer is not limited as long as it can be applied to the surface of the object to be painted with the base coat. Examples of known painting methods include brush painting, trowel painting, roller painting, spray painting, roll painting, and flow painting. Applying a primer or sealer can improve the adhesion of the paint film to the object to be painted and prevent the object from absorbing the paint.

[0057] The temperature during application of the primer or sealer is preferably 5 to 40°C, and more preferably 10 to 30°C. Drying after painting only requires the removal of the water-based medium, and can be done at room temperature or by heating. The drying temperature is, for example, 5 to 90°C. The drying time varies depending on the drying temperature, but is, for example, 5 minutes to 48 hours.

[0058] The amount of primer or sealer applied before drying can be appropriately selected according to the average film thickness to be formed, but generally ranges from 100 to 1000 g / m². 2 Preferably, 150-800 g / m² 2 This is more preferable. When the amount of paint applied before drying is within the above range, good adhesion between the object to be coated and the paint film is achieved. The dry coating amount of primer or sealer is 10-800 g / m². 2 Preferably, 20-700 g / m² 2 This is more preferable. When the dry coating amount is within the above range, good adhesion between the object to be coated and the coating film is achieved.

[0059] [Applying primer] There are no restrictions on the application method of the primer, as long as it can be applied to the surface of the object to be painted. Examples of known application methods include brush painting, trowel painting, roller painting, spray painting, roll painting, and flow painting. By applying a primer and forming a primer film on the surface of the object to be painted, the water resistance and durability of the building material can be improved.

[0060] The temperature of the primer paint during painting is preferably 5 to 40°C, and more preferably 10 to 30°C. Drying after painting only requires the removal of the water-based medium, and can be done at room temperature or by heating. The drying temperature is, for example, 5 to 90°C. The drying time varies depending on the drying temperature, but is, for example, 5 minutes to 48 hours.

[0061] The amount of primer applied before drying can be appropriately selected according to the average film thickness to be formed, but generally ranges from 100 to 1000 g / m². 2 Preferably, 150-800 g / m² 2 This is more preferable. If the amount of paint applied before drying is above the lower limit of the preferred range, the coating performance, such as water resistance, is excellent. If it is below the upper limit of the preferred range, defects such as cracking of the coating are less likely to occur during drying.

[0062] The dry coating amount of the primer is 30-800 g / m². 2 Preferably, 50-700 g / m² 2 This is more preferable. When the dry coating amount is above the lower limit of the preferred range, the coating film performance, such as water resistance, is excellent. When it is below the upper limit of the preferred range, defects such as cracking of the coating film are less likely to occur during drying.

[0063] [Painting with multi-colored paint] Multicolor patterned paints are applied over a base coat. There are no restrictions on the application method for multi-color patterned paints; for example, known application methods such as brush painting, trowel painting, roller painting, spray painting, roll painting, and flow painting can be used. Among these, spray painting is preferred from the viewpoint of obtaining a good appearance.

[0064] The temperature of the multi-color paint during application is preferably 5 to 40°C, and more preferably 10 to 30°C. Drying after painting only requires the removal of the water-based medium, and can be done at room temperature or by heating. The drying temperature is, for example, 5 to 90°C. The drying time varies depending on the drying temperature, but is, for example, 5 minutes to 48 hours.

[0065] The amount of multi-color patterned paint applied before drying is determined within a range such that the area in which the base coat is visible through the multiple types of gel-like particles constituting the multi-color patterned coating is 3 to 60%, preferably 10 to 45%, and more preferably 20 to 30%, of the total area of ​​the base coat beneath the multi-color patterned coating. Specifically, 250-800 g / m 2 Preferably, 300-600 g / m 2 This is preferable.

[0066] The dry coating amount of the multi-color patterned paint is determined within a range such that the area in which the base coat is visible through the multiple types of gel-like particles constituting the multi-color patterned coating is 3 to 60%, preferably 10 to 45%, and more preferably 20 to 30%, of the total area of ​​the base coat beneath the multi-color patterned coating. Specifically, 30-640 g / m 2 Preferably, 90-420 g / m² 2 This is preferable.

[0067] However, if the particle size of the gel-like particles is small, the visible area of ​​the base coat tends to be smaller even with the same amount of paint applied. Therefore, when using gel-like particles with a small diameter and thickness, it is preferable that both the amount of paint applied before drying and the amount of paint applied after drying be relatively small within the ranges described above.

[0068] <Effects and Effects> According to this embodiment, by incorporating gel-like particles (X) that are similar in color to but different from the underlying coating into a multi-color patterned paint, and creating a multi-color patterned paint that allows the underlying coating to be seen through the gaps between the overlapping gel-like particles, a three-dimensional appearance can be achieved. This is thought to be because the presence of gel-like particles (X) in the multi-colored patterned coating creates a gradient effect, giving the illusion of areas being illuminated by light and areas being in shadow.

[0069] If the amount of gel-like particles (X) is too much or too little, or if the proportion of the area where the base coating is visible between the gel-like particles is too large or too small, the gradation effect will be impaired, and this illusion will be less likely to occur. Furthermore, it is acceptable for the gel-like particles (Y) to be predominantly the same color as the base coat film, or to be predominantly the same color as the base coat film. This is because a gradient effect can be obtained based on the color of the base coat film and the color of the gel-like particles (X). [Examples]

[0070] The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples.

[0071] <Raw materials> The raw materials used in each example are as follows: Slate board: Complies with JIS 5430. 30cm (length) x 20cm (width) x 0.3cm (thickness).

[0072] Extender pigment: Manufactured by Nippon Talc Co., Ltd., hydrated magnesium silicate, average particle size 2.0 μm, 4% by mass dispersion in water. Gelling agent: Ammonium borate, 5% by mass aqueous solution, manufactured by Yoneyama Chemical Industry Co., Ltd. Water-soluble polymer compound: Sodium carboxymethylcellulose, manufactured by Kanto Chemical Co., Ltd., 1% by mass solution.

[0073] Resin emulsion: Dow Coating Materials, Ltd., "Primal® E-357", acrylic-styrene resin emulsion, Tg 45℃. Hydrophilic colloid-forming substance: DuPont's "MEYPRO HPG(registered trademark) 8111," a nonionic gual gum derivative, 1.5% by mass aqueous solution. Dispersant: Orotan® 731A, manufactured by Dow Chemical Company, anionic polymer dispersant, 100% solids. Anionic polymer dispersion.

[0074] Red pigment: Toda Kogyo Co., Ltd., "TODA COLOR 130ED", iron oxide for coloring, average BET particle size 0.016 μm. Yellow pigment: "TAROX(registered trademark) LL-XLO" manufactured by Titanium Industries Co., Ltd., synthetic iron oxide pigment, needle-shaped particles. White pigment: "TIPAQUE® R-930" manufactured by Ishihara Sangyo Co., Ltd., titanium dioxide produced by sulfuric acid method, average particle size 0.25 μm. Black pigment: "Dipyroxide (registered trademark) Black9596" manufactured by Dainichi Seika Co., Ltd. Brown pigment: "Dipyroxide (registered trademark) Brown9290," manufactured by Dainichi Seika Co., Ltd.

[0075] <Primer paint> [Preparation of primer] According to the formulations shown in Table 1, the resin emulsion, pigment, dispersant, and water were thoroughly stirred and mixed to obtain primers A-1 to A-4.

[0076] [Color measurement of the undercoat] The color of the primer film obtained with each primer was measured as follows. On art paper, apply each primer at a rate of 250g / m². 2 The surface was spray-painted to a wet finish and dried for 8 hours under conditions of 20°C and 50% relative humidity. The obtained undercoat film was color-measured at 10 arbitrary locations using a colorimeter "CM-2500d" (product name, manufactured by Konica Minolta) under the following conditions: observation field of view: 2 degrees, observation light source: C, measurement diameter / illumination diameter: φ8 mm / φ11 mm. The average value was then calculated. The results are shown in Table 1.

[0077] [Table 1]

[0078] <Emulsion paint> [Preparation of emulsion paints] Emulsion paints B-1 to B-4 were obtained by thoroughly stirring and mixing the resin emulsion, hydrophilic colloid-forming substance, pigment, dispersant, and water according to the formulations shown in Table 2.

[0079] [Color measurement of emulsion coatings] Except for using each of the resulting emulsion coatings instead of the primer coating, the color of the emulsion coating film formed from the emulsion coating was measured in the same manner as the color measurement of the primer coating film. The results are shown in Table 2.

[0080] [Table 2]

[0081] <Gelling agent solution> 25 parts by mass of extender pigment, 5 parts by mass of gelling agent, and 25 parts by mass of water-soluble polymer compound were mixed and vigorously stirred, and then diluted with 45 parts by mass of water to obtain a gelling agent solution.

[0082] <Gel-like particle dispersion> [Preparation of gel-like particle dispersion] 40 parts by mass of the gelling agent solution prepared above were mixed with 60 parts of emulsion paint B-1 under stirring, and stirring was continued to obtain gel-like particle dispersion liquid C-1. As shown in Table 3, emulsion paints B-2 to B-4 were used instead of emulsion paint B-1 to obtain gel-like particle dispersions C-2 to C-4.

[0083] [Longest axis and thickness of gel-like particles] Twenty flake-shaped gel particles were randomly selected from each prepared gel particle dispersion, and their major axis and thickness were measured using a microscope. The arithmetic mean values ​​of each measurement are shown in Table 3.

[0084] [Table 3]

[0085] [Types of gel-like particles] The color difference (ΔL and Δab) between each substrate and emulsion coating was calculated from the color measurement data of the substrate coating in Table 1 and the color measurement data of the emulsion coating in Table 2. The results are shown in Table 4. Furthermore, the classification of each gel particle dispersion into gel particle (X) and gel particle (Y) was determined by calculating ΔL and Δab. The results are shown in Table 4.

[0086] [Table 4]

[0087] As shown in Table 4, for example, the gel particles dispersed in gel particle dispersion C-1 correspond to gel particles (X) in relation to the primer film formed from primer A-1, but correspond to gel particles (Y) in relation to the primer film formed from primer A-2. Furthermore, for example, the gel particles dispersed in gel particle dispersion C-2 correspond to gel particles (Y) in relation to the primer film formed from primer A-1, but correspond to gel particles (X) in relation to the primer film formed from primer A-2.

[0088] <Examples, Comparative Examples> [Example 1] Apply primer A-1 to the slate boards, using a coating rate of 250g / m². 2 The surface was spray-painted to a wet state and dried for 8 hours under conditions of 25°C and 50% relative humidity to form a primer film.

[0089] On the other hand, gel-like particle dispersions C-1 and C-2 were mixed with a resin emulsion in the formulations shown in Table 5 to produce a multi-color pattern paint. The resulting multi-colored paint was applied to the base coat at a rate of 170g / m². 2 The material was spray-painted to a wet state and dried for 8 hours under conditions of 25°C and 50% relative humidity to form a multi-colored patterned coating, obtaining the coated product of Example 1.

[0090] After forming the multi-colored patterned coating, within the 10cm x 10cm evaluation area (the total area of ​​the base coating beneath the multi-colored patterned coating) where the multi-colored patterned coating is formed on top of the base coating, the area Acm of the portion where the base coating is visible through the gel-like particles constituting the multi-colored patterned coating is measured. 2This is determined by measuring the area where the color of the base coat can be observed using a Keyence VHX-8000, and is calculated as Acm. 2 The area of ​​the evaluation range is 100 cm². 2 The visible area of ​​the substrate coating was determined by dividing by [a specific factor]. As a result, the visible area of ​​the substrate coating was 25%.

[0091] Furthermore, the ratio of gel-like particles (X) to the total amount of gel-like particles (Y), "(X) / (X+Y)," was calculated. From the results in Table 4, gel particle dispersion C-1 contains gel particles (X) and gel particle dispersion C-2 contains gel particles (Y), so the ratio "(X) / (X+Y)" in Example 1 was 50% by mass.

[0092] [Examples 2-10, Comparative Examples 1-7] Except for changing the type of primer, the formulation and amount of the multi-color pattern paint as shown in Tables 5 and 6, the primer film and multi-color pattern paint film were formed on the slate strips in the same manner as in Example 1, and the painted products of each example were obtained. Furthermore, the visible area of ​​the undercoat and "(X) / (X+Y)" were determined in the same manner as in Example 1. The results are shown in Tables 5 and 6.

[0093] <Evaluation of three-dimensionality> Five panelists visually inspected the appearance of each painted example and evaluated its three-dimensionality using the following evaluation criteria. The average of the five panelists' evaluation results was determined using the following criteria. The results are shown in Tables 5 and 6.

[0094] (Evaluation Criteria) 4: The overall image has shading and a strong sense of depth. 3: It has shading and a sense of depth. 2: A sense of three-dimensionality can be felt only in certain parts. 1: It lacks a sense of depth.

[0095] (Judgment criteria) ◎: The average score of the evaluation results from the five panelists is 3 or higher. ○: The average of the evaluation results from the five panelists is between 2 and 3. △: The average of the evaluation results from the five panelists is between 1 and 2. ×: The average of the evaluation results from the five panelists is less than 1.

[0096] [Table 5]

[0097] [Table 6]

[0098] As shown in Table 5, a good sense of three-dimensionality was obtained in all of the examples. On the other hand, Comparative Example 1, where "(X) / (X+Y)" was too small, and Comparative Example 2, where it was too large, both lacked a sense of three-dimensionality. Similarly, Comparative Example 3, where the base coating was not visible, and Comparative Example 4, where the visible area of ​​the base was too large, both lacked a sense of three-dimensionality. Furthermore, Comparative Examples 5 and 6, which used multi-color pattern paints containing only gel-like particles with a large difference in ΔL or Δab from the base coating, both lacked a sense of three-dimensionality. Finally, Comparative Example 7, which used multi-color pattern paints containing only gel-like particles with a ΔL that was too small from the base coating, also lacked a sense of three-dimensionality.

Claims

1. The device comprises an object to be coated, a base coating film formed on at least a portion of the surface of the object to be coated, and a multi-color pattern coating film formed on the base coating film. The aforementioned multi-color patterned coating film is a coating film formed from a multi-color patterned coating containing multiple types of gel-like particles in which emulsion coating is encapsulated within a gel film. The multiple types of gel-like particles contained in the aforementioned multi-colored paint include gel-like particles (X) whose Hunter Lab value of the coating film formed from the contained emulsion paint satisfies both of the following formulas (1) and (2), and gel-like particles (Y) that do not satisfy at least one of the following formulas (1) and (2). The ratio of the gel particles (X) to the total amount of the gel particles (Y) is 5 to 50% by mass. A painted object in which the multi-colored pattern coating is formed such that the area in which the base coating can be seen from between the multiple types of gel-like particles constituting the multi-colored pattern coating is 3 to 60% of the total area of ​​the base coating beneath the multi-colored pattern coating. 10≦|ΔL|≦30...Formula (1) 0≦Δab≦8...Formula (2) however, ΔL=L １ -L ２ Δab=((a １ -a ２ ) ２ + (b １ -b ２ ) ２ ) １／２ L １ L is the brightness of the aforementioned undercoat film. ２ The brightness of the coating film formed from an emulsion paint containing gel-like particles, a １ and b １ The chromaticity of the aforementioned undercoat film, a ２ and b ２ This refers to the chromaticity of a paint film formed from an emulsion paint containing gel-like particles.

2. A method for manufacturing a painted object, comprising applying a primer to at least a portion of the surface of the object to be painted to form a primer film, and then applying a multi-color patterned paint on the obtained primer film to form a multi-color patterned paint film, The aforementioned multi-color patterned paint contains multiple types of gel-like particles in which the emulsion paint is encapsulated within a gel film. The multiple types of gel-like particles contained in the aforementioned multi-colored paint include gel-like particles (X) whose Hunter Lab value of the coating film formed from the contained emulsion paint satisfies both of the following formulas (1) and (2), and gel-like particles (Y) that do not satisfy at least one of the following formulas (1) and (2). The ratio of the gel particles (X) to the total amount of the gel particles (Y) is 5 to 50% by mass. A method for manufacturing a painted object, comprising applying a multi-colored paint such that the area in which the base coat is visible from between the multiple types of gel-like particles constituting the multi-colored patterned paint is 3 to 60% of the total area of ​​the base coat beneath the multi-colored patterned paint. 10≦|ΔL|≦30...Formula (1) 0≦Δab≦8...Formula (2) however, ΔL=L １ -L ２ Δab=((a １ -a ２ ) ２ + (b １ -b ２ ) ２ ) １／２ L １ L is the brightness of the aforementioned undercoat film. ２ The brightness of the coating film formed from an emulsion paint containing gel-like particles, a １ and b １ The chromaticity of the aforementioned undercoat film, a ２ and b ２ This refers to the chromaticity of a paint film formed from an emulsion paint containing gel-like particles.

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