Method for forming a decorative coating surface

Abstract

To provide a formation method of a decorative coating surface having a fine appearance with a contrast.SOLUTION: A formation method of a decorative coating surface includes steps of: forming a colored coating surface on a surface to be coated; and forming a clear coating by applying a clear paint on the colored coating surface by using a roller; in which the roller is a roller brush in which at least two kinds of liquid absorbing materials having each different hardness and / or density are mixed on a cylindrical outer peripheral surface.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a method for forming a novel decorative film surface.

Background Art

[0002] <ã Conventionally, decorative films having various patterns have been formed on the wall surfaces of buildings, civil engineering structures, etc. In particular, in recent years, with the design of many highly designed buildings, for example, various decorative films such as natural stone finish, wood grain finish, metal finish, leather finish, porcelain (glaze) finish, antique finish, etc. are desired. As an example of such a decorative film, a decorative film formed by partially overlapping a plurality of coating materials to form a pattern can be mentioned. <í

[0003] For example, Patent Document 1 describes a method of applying a primer paint over the entire surface and then applying a paint (pattern paint) that is darker in color than the primer paint to create a pattern. However, in Patent Document 1, there is a risk that the contrast in color, texture, etc. may be insufficient, resulting in a monotonous and artificial finish. [[ID=1ē]]

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] [[ID=3ē]]In view of such problems, the present invention has been made, and an object thereof is to provide a method for forming a decorative film surface with high aesthetic properties, which can obtain a natural finish with contrast.

Means for Solving the Problems

[0006] It should be noted that there are some unclear symbols in the original text (such as <ĩ , <í , <ã , <ē0000097~), which are retained as they are in the translation for the sake of following the rules. If these are incorrect or unclear in the original, it may be necessary to further clarify the source text for a more accurate translation.To solve these problems, the inventors diligently studied and came up with a method for forming a decorative coating surface by forming a colored coating surface on the surface to be coated and applying a clear coating paint in a specific manner to the colored coating surface, thereby completing the present invention.

[0007] In other words, the present invention has the following features. 1. A method for forming a decorative coating surface, A process of forming a colored film on the surface to be coated, The process involves applying a clear coating unevenly to the above-mentioned colored coating surface using a painting roller to form a discontinuous clear coating. Includes, The above clear coating contains a synthetic resin and a transparent powder. The above-mentioned transparent powder is selected from glass pulverized material, glass flakes, transparent resin flakes, mica, and calcined mica. The above clear coating forms a colorless, transparent clear film. A method for forming a decorative coating surface, characterized in that the above-mentioned painting roller is a roller brush in which at least two or more liquid-absorbing materials with different hardness and / or density are mixed on the cylindrical outer surface. 2. The method for forming a decorative coating surface according to 1, characterized in that the colored coating surface has at least two or more colored regions mixed together. 3. The method for forming a decorative coating surface according to 1, characterized in that the above-mentioned colored coating is a matte coating. 4. The method for forming a decorative coating surface according to 1, characterized in that the colored coating has a specular gloss of 40 or less. [Effects of the Invention]

[0008] The present invention is a method for forming a decorative coating surface, which includes the steps of forming a colored coating surface on a surface to be coated, and applying a clear coating to the colored coating surface using a specific painting roller to form a clear coating. This method provides a natural finish with contrast and a highly aesthetically pleasing decorative coating surface. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1(I) is a front view showing an example of a colored coating surface, and (II) is a front view showing an example of a decorative coating surface of the present invention formed on (I) with a clear coating. [Figure 2] Figure 2(I) is a front view showing an example of a colored coating surface, and (II) is a front view showing an example of a decorative coating surface of the present invention formed on (I) with a clear coating. [Figure 3] Figure 3 is a cross-sectional view of the roller brush used in the present invention. [Explanation of Symbols]

[0010] 1. Decorative coating surface 2. Colored coating surface 2a. Colored area A 2b. Colored area B 3. Clear coating 4. Paint roller 4a~4e. Sponge material 4f. Outer surface of the cylinder 4g. Outer diameter direction of the cylinder [Modes for carrying out the invention]

[0011] The following describes embodiments for carrying out the present invention.

[0012] The present invention relates to a method for forming a decorative coating surface, characterized by comprising the steps of forming a colored coating surface on a surface to be coated (first step), and applying a clear coating to the colored coating surface using a specific painting roller to form a clear coating (second step). The decorative coating surface formed by the present invention has a clear coating applied unevenly to the surface side of the colored coating surface. As a result, when the decorative coating surface is viewed from the front or at an angle, at least areas with different contrasts are mixed together, resulting in a natural finish with contrast and a highly aesthetic decorative coating surface.

[0013] Figure 1 shows an example (front view) of a decorative coating surface formed by the present invention. Figure 1(I) is an example of a colored coating formed on a surface to be coated, and (II) is an example of a decorative coating surface formed by applying a clear coating on the colored coating surface of (I). According to the method for forming a decorative coating surface of the present invention, as shown in Figure 1(II), when viewed from the front, the clear coating is formed unevenly, and it is possible to form a highly aesthetic decorative coating surface with contrast due to differences in gloss, color tone, depth, texture, etc. (hereinafter also referred to as "differences in gloss, etc.").

[0014] In the present invention, as a first step, a coating material is applied to the surface to be coated to form a colored film surface (Figure 1(I)). As the coating material for forming the colored film, a material containing resin and pigment can be used. In the present invention, the color, gloss, etc. can be set by adjusting the type of pigment, the mixing ratio, etc. The mixing ratio of resin and pigment is preferably 5 to 500 parts by weight (more preferably 20 to 400 parts by weight, and even more preferably 30 to 300 parts by weight) of pigment per 100 parts by weight of resin solids.

[0015] Examples of resins include water-soluble resins, water-dispersible resins, solvent-soluble resins, solvent-free resins, non-water-dispersible resins, or composites thereof. These may also have crosslinking reactivity, and their form is not particularly limited; they may be one-component or two-component. In the present invention, water-dispersible resins and / or water-soluble resins are particularly preferred. Examples of usable resins include cellulose, polyvinyl alcohol, ethylene resin, vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, silicone resin, acrylic resin, urethane resin, acrylic silicone resin, fluororesin, or composites thereof. In the present invention, it is desirable not to use hydraulic binders such as cement, as they may limit the color of the coating.

[0016] As pigments, known coloring pigments, extender pigments, etc., can be used. Examples of coloring pigments include titanium dioxide, zinc oxide, carbon black, lamp black, bone black, graphite, black iron oxide, copper chromium black, cobalt black, copper manganese iron black, red iron oxide, molybdate orange, permanent red, permanent carmine, anthraquinone red, perylene red, quinacridone red, yellow iron oxide, titanium yellow, first yellow, benzoimidazolone yellow, chromium green, cobalt green, phthalocyanine green, ultramarine, Prussian blue, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet, aluminum flake pigment, pearl pigment, and luminous pigment. By using one or more of these coloring pigments, any hue can be achieved.

[0017] Examples of extender pigments include heavy calcium carbonate, crushed stone, light calcium carbonate, white carbon, talc, kaolin, clay, earthenware clay, china clay, diatomaceous earth, barite powder, barium sulfate, precipitated barium sulfate, silica sand, silica powder, quartz powder, resin beads, glass beads, hollow balloons, etc., and one or more of these can be used. By appropriately setting the type of extender pigment, mixing ratio, etc., the coating material can be adjusted to the desired gloss level.

[0018] In the first step, the colored coating formed by the coating material is preferably a matte coating. In this case, it is possible to easily form an aesthetically pleasing pattern with contrast due to differences in gloss (sheen), etc. The term "matte" here includes not only what is generally called matte, but also those referred to as 30% gloss, 50% gloss, etc.

[0019] Specifically, in this invention, gloss can be defined by specular gloss. The specular gloss of the colored film is preferably 40 or less (more preferably 20 or less, and even more preferably 0.1 to 10). Note that "specular gloss" is a value measured in accordance with JIS K5600-4-7 "Specular Gloss".

[0020] In addition to the components described above, the coating material of the present invention may also contain known additives, such as aggregates, dyes, thickeners, wetting agents, antifreezes, film-forming aids, preservatives, antifungal agents, antialgal agents, antimicrobial agents, dispersants, defoaming agents, ultraviolet absorbers, light stabilizers, antioxidants, catalysts, diluent solvents, etc., to the extent that they do not significantly impair the effects of the present invention. The coating material can be manufactured by uniformly mixing each of the above components by conventional methods.

[0021] Figure 2 shows another example (front view) of a decorative coating surface formed by the present invention. When viewed from the front as in Figure 2(I), it is preferable that the colored coating surface of the present invention has at least two or more colored regions (for example, colored region A, colored region B, etc.) mixed together. In the case of such a colored coating surface, as in Figure 2(II), a more aesthetically pleasing decorative coating surface can be formed by a combination of color contrast due to the colored coating and contrast due to differences in gloss (sheen) due to the clear layer. As a method for forming a surface in which at least two or more colored regions are mixed together in the first step, for example, the following method can be used. (1-1) Method using two or more covering materials with different color tones (1-2) A method using a coating material containing two or more colored particles with different shades.

[0022] First, let me explain the method described in (1-1) above. In the method described in (1-1) above, a colored coating can be formed by using two or more coating materials with different color tones so that two or more colored areas are mixed together. Specifically, (1-1A) A method in which the first coating material is applied to the entire surface, and then the second coating material is applied discontinuously (partially). (1-1B) Method of applying the first coating material and the second coating material discontinuously (partially). Examples include the following. The shape of each colored region when the colored coating is viewed from the front is not particularly limited and may include, for example, square, rectangular, circular, elliptical, triangular, rhombus, polygonal, irregular, striped, or grid-like shapes.

[0023] In the present invention, it is preferable to use two or more coating materials having different color tones with a color difference (ΔE) of at least 3 or more (more preferably 5 or more). By having the color difference (ΔE) be a specific value in this way, a highly aesthetic film having a contrast between the colored regions can be formed. The upper limit of the color difference (ΔE) is not particularly limited, but is preferably 90 or less, and can be set according to the desired design. For example, when forming a unified and calm design while imparting contrast, the upper limit of the color difference (ΔE) is preferably 20 or less. On the other hand, when forming an accent design with a clear contrast between the colored regions, it is preferable to set the color difference (ΔE) to more than 20 and 90 or less.

[0024] Note that the color difference (ΔE) in the present invention is a value measured using a color difference meter for colors. Specifically, each coating material is applied to a standard white paper using a film applicator with a gap of 250 μm, and the L * value, a * value, and b * value (average value of three or more measurement points) can be calculated by the following formula. <Formula> ΔE = { (L *1 - L *2 ) 2 + (a *1 - a *2 ) 2 + (b *1 - b *2 ) 2} 0.5 (In the formula, L *1 , a *1 , and b *1 are the L * , a * , and b * of the first coating material, respectively. L *2 , a *2 , and b *2 are the L * , a * , and b * of the second coating material, respectively. )

[0025] In (1-1A) above, the amount of the first coating material to be applied should be set appropriately considering the type and condition of the surface to be coated, the desired finish, etc., but preferably 30 to 500 g / m². 2 More preferably 80-400 g / m² 2 More preferably 90-300 g / m² 2 When the amount of the first coating material applied meets the above range, a continuous film covering the entire surface to be coated is easily formed. The amount of the second coating material applied can be set appropriately according to the desired finish (pattern, etc.), but it is preferable that the amount of the second coating material applied is less than that of the first coating material, preferably 100 g / m². 2 More preferably, 5-90 g / m 2 More preferably 10-80 g / m 2 Therefore, when the amount of the second coating material applied satisfies the above range, a discontinuous film is easily formed, and a colored film surface with mixed colored regions of different colors can be stably formed. In this invention, "α~β" is synonymous with "α or more and β or less".

[0026] In (1-1B) above, the application amount of the first coating material and the second coating material is preferably 100 g / m² for at least one of them. 2 The following (more preferably 5-90 g / m²) 2 More preferably 10-80 g / m 2 ) is sufficient. The other type of coating material can be set appropriately considering the type, condition, and finish of the surface to be coated, but preferably 500g / m 2 Less than or equal to (more preferably 100 g / m²) 2 More preferably, 5 to 90 g / m 2 Particularly preferably 10-80 g / m 2 ) is the case. In the above (1-1B), the application amounts of the first coating material and the second coating material are 100 g / m² each. 2 The following range is preferable.

[0027] The coating material in this invention can be diluted with various solvents at the time of application. The dilution ratio of the coating material is preferably 0 to 50% by weight (more preferably 0 to 30% by weight) relative to the coating material. The viscosity of the coating material at the time of application is preferably 0.1 to 10 Pa·s (more preferably 0.5 to 9.5 Pa·s). The viscosity is the value measured using a BH-type viscometer (rotation speed 20 rpm) under standard conditions (temperature 23°C, relative humidity 50%) (pointer value at the 4th rotation).

[0028] In (1-1A) and (1-1B) above, the timing of applying the second coating material is not particularly limited, but it is preferable to apply it after the first coating material (the previously applied colored coating material) has reached a state such as touch-dry, semi-cured, or fully cured as specified in JIS K5400. In the present invention, it is preferable to apply the second coating material after the first coating material has reached touch-dry (more preferably after semi-cured, and even more preferably after fully cured). In the present invention, drying and curing may preferably be carried out at room temperature (5-40°C).

[0029] Examples of application tools for coating materials include sprayers, rollers, brushes (including paintbrushes, etc.), and pressing tools (including tapping tools, etc.). Examples of rollers include fibrous rollers and porous (sponge-like) rollers, while examples of pressing tools include those made of sponge, felt, woven fabric, non-woven fabric, etc.

[0030] In the above (1-1A), when applying the colored coating material to the entire surface to be coated, it is desirable to use, for example, a spray, roller, or brush. A fibrous roller is particularly suitable as a roller.

[0031] In the present invention, when applying the colored coating material discontinuously as described in (1-1A) and (1-1B) above, it is preferable to use a sponge-like material. In the present invention, by using such a sponge-like material when applying the coating material discontinuously, it is possible to create a non-linear (intricate) boundary between colored areas while providing contrast, thereby further enhancing the aesthetic appeal.

[0032] Next, we will explain the method described in (1-2) above. In the above method (1-2), a colored film can be formed by using a coating material containing two or more colored particles with different shades, such that two or more colored areas are mixed together. With this method, a colored film with two or more colored areas mixed together can be formed in a single painting application.

[0033] Specifically, the covering material in (1-2) above is: • A coating material in which non-film-forming colored particles are dispersed in a dispersion medium containing a binder. • A coating material in which film-forming colored particles are dispersed in a dispersion medium. These are some examples. The shape of each colored region when the colored film is viewed from the front depends on the shape of the colored particles after painting, and examples include circular, elliptical, and irregular shapes.

[0034] As for the colored particles in the coating material described in (1-2) above, gel-like or liquid-like particles are preferred. Such colored particles can be obtained by gelling or encapsulating a coloring material containing a binder and a coloring pigment. As non-film-forming colored particles, gel-like colored particles in which the coloring material has been gelled can be used, and as film-forming colored particles, encapsulated colored particles containing a liquid coloring material can be used. The same binder and coloring pigment as described above can be used. Known methods can be used to gel or encapsulate the coloring material.

[0035] In the application of the coating material described in (1-2) above, known application tools such as sprayers and rollers can be used. The amount of such coating material applied depends on the form of the coating material, but is preferably 50 to 800 g / m² in terms of solid content. 2 This is the extent of the viscosity. When painting, the viscosity can be adjusted as needed by mixing in a diluent such as water. The coating material can be dried at room temperature (5-40°C).

[0036] In the present invention, as a second step, a clear coating is applied to the colored coating surface using a specific painting roller to form a clear coating (Figure 1(II), Figure 2(II)). As a result, a clear coating with an uneven pattern is formed on the colored coating surface, such as a clear coating with uneven thickness (having irregularities), a discontinuous clear coating (e.g., a mesh-like or island-like pattern), or a clear coating with both uneven and discontinuous thickness. As a result, when the decorative coating surface is viewed from the front or at an angle, at least areas with different contrasts are mixed together, and a highly aesthetic decorative coating surface with contrast due to differences in gloss (sheen) can be obtained. In the present invention, a discontinuous clear coating, or a clear coating with both uneven and discontinuous thickness, is preferred.

[0037] The clear coating is not limited to any material that forms a transparent film, and the binder can be any material capable of forming a transparent film, such as acrylic resin, urethane resin, epoxy resin, vinyl acetate resin, silicone resin, fluororesin, acrylic vinyl acetate resin, acrylic urethane resin, and acrylic silicone resin. These can be used individually or in combination of two or more. Among such synthetic resins, water-based resins such as water-dispersible resins (resin emulsions) and water-soluble resins are particularly preferred.

[0038] Furthermore, the clear coating may be colorless and transparent, or colored and transparent, and may be glossy or matte (including 70% gloss, 50% gloss, 30% gloss, etc.). Such a clear coating can be mixed with coloring pigments, extender pigments, and other powder components to the extent that the transparency of the clear film can be maintained. The same coloring pigments and extender pigments as described above can be used. As other powder components, transparent powders are preferred, and for example, glass pulverized material, glass flakes, transparent resin flakes, mica, calcined mica, etc. can be used. In particular, the clear coating of the present invention preferably contains one selected from glass flakes, mica, calcined mica, pearl pigments, and luminous pigments. This makes it possible to form a light-reflective transparent coating with uneven light reflection (sparkle) when the decorative coating surface is viewed from the front or at an angle, and the contrast due to differences in gloss (sheen) is further enhanced, resulting in a highly aesthetic decorative coating surface.

[0039] The average particle size of the above powder component is preferably 0.01 to 1000 μm (more preferably 0.02 to 800 μm, and even more preferably 0.03 to 600 μm). The content of the powder component is preferably 0.01 to 50 parts by weight (more preferably 0.03 to 30 parts by weight, and even more preferably 0.05 to 20 parts by weight) per 100 parts by weight of solid content of the above binder. The average particle size can be measured using a laser diffraction particle size analyzer.

[0040] The opacity of the film formed by the clear coating is preferably 60% or less (more preferably 1-50%). The viscosity of the clear coating at the time of application is preferably 0.1-10 Pa·s (more preferably 0.5-9.5 Pa·s).

[0041] The painting roller used in the present invention is characterized by a roller brush having at least two or more liquid-absorbing materials (Figure 3: 4a to 4e) with different hardness and / or density mixed on the cylindrical outer surface (Figure 3: 4f), as shown in Figure 3. By using such a specific roller brush, an uneven pattern can be created. In particular, if the cylindrical outer surface has an uneven shape, an even more aesthetically pleasing pattern can be created. In the present invention, the outer diameter of the roller brush (Figure 3: R) can be set appropriately according to the desired pattern, but is preferably 20 to 60 mm (more preferably 30 to 50 mm).

[0042] In the roller brush described above, the cylinder is hollow so that a handle with a shaft can be attached, and the handle shaft can be attached to the hollow for use. The cylinder (tubular core material) is not particularly limited, and for example, core materials made of plastic, wood, metal, paper, etc. can be used. Furthermore, in order to improve the adhesion between the handle shaft and the core material, a reinforcing material made of plastic, rubber, glass, metal, fiber, etc. can be used between the handle shaft and the core material. The reinforcing material may be integrated with the handle shaft.

[0043] Furthermore, examples of liquid-absorbing materials mixed on the outer surface of the cylinder include felt, nonwoven fabric, and sponge material. At least two or more (preferably three or more) of these materials with different hardness, density, or both are mixed and used. In the present invention, it is preferable to use a combination of two or more (preferably three or more) sponge materials. The hardness of each liquid-absorbing material is preferably 10 to 3000 N (more preferably 20 to 2000 N, even more preferably 30 to 1500 N), and the density is preferably 1 to 300 kg / m³. 3 (comfortable 3-200 kg / m 3 More preferably 5-150 kg / m 3). By using a roller brush that combines such liquid-absorbing materials, it is possible to form patterns that correspond to the degree of deformation of each liquid-absorbing material and the transferability of the coating material. Here, "hardness" refers to the hardness value (Method C) measured from the force when the test piece is compressed to 40% of its thickness, in accordance with JIS K6400-2. Also, "density" refers to the apparent density value calculated from the weight and dimensions of the test piece, in accordance with JIS K7222.

[0044] Furthermore, the above-mentioned liquid-absorbing material is preferably fixed in a form that covers the outer surface of the cylinder, and more preferably in a form in which at least two or more (preferably three or more) liquid-absorbing materials with different hardness and / or density are fixed in a stacked manner in the outer diameter direction of the cylinder (Figure 3: 4g). Moreover, it is even more preferable that the multiple liquid-absorbing materials are compression-molded so that they are randomly mixed in the outer circumference and outer diameter directions. The effects of the present invention can be enhanced by using a roller brush having such a liquid-absorbing material.

[0045] The above-mentioned liquid-absorbing material is a three-dimensional shape with an irregular outer shape, and the size of each individual material is preferably 1 to 30 mm (more preferably 2 to 20 mm). Such liquid-absorbing materials come together to form a liquid-absorbing layer. In the present invention, it is preferable that multiple liquid-absorbing materials of different sizes are mixed together. In such a case, liquid-absorbing materials with different hardness and / or density as well as size are randomly mixed on the outer surface of the cylinder, which can further enhance the effects of the present invention. Furthermore, irregular uneven shapes are easily formed between the liquid-absorbing materials, which can further enhance the effects of the present invention. The "size" referred to here is the longest axis of the outer shape, and is measured, for example, by sieving with a sieve having a grid of predetermined dimensions on one side. The thickness of the liquid-absorbing layer fixed to the outer surface of the cylinder depends on the size of the individual liquid-absorbing materials, but is preferably 50 mm or less (more preferably 1 to 30 mm, and even more preferably 2 to 15 mm). Furthermore, in the present invention, it is preferable to provide an uneven shape on the outer surface of the liquid-absorbing layer according to a desired pattern. Methods for creating an uneven surface include embossing during the compression molding of the liquid absorbent material, or partially removing the compressed liquid absorbent material. This can further enhance the effects of the present invention. When partially removing the compressed liquid absorbent material, known methods such as pinching or plucking tend to produce random uneven surfaces.

[0046] Clear coatings can form an uneven film by using the specific painting roller described above. Specifically, in this invention, after loading the clear coating onto the painting roller, the clear coating is applied unevenly by rolling it in contact with the colored film surface. The amount of clear coating applied is preferably 10 to 300 g / m². 2 (comfortably 20-250g / m 2 )

[0047] <Surface to be coated> The surface to be coated in the present invention is preferably a substrate surface of a building, civil engineering structure, etc., particularly a substrate that constitutes the surface of interior and exterior walls, ceilings, joinery, etc. Examples of such substrates include gypsum board, concrete, mortar, porcelain tile, brick, cement board, fiber-reinforced cement board, cement calcium silicate board, perlite board, ALC board, siding board, extruded board, plywood, wood board, steel plate, plastic plate, glass plate, etc. The surface of these substrates may have been treated with some kind of surface treatment (e.g., sealer, surfacer, filler, etc.), or may already have a coating film formed on it, or may have wallpaper attached to it. [Examples]

[0048] The following examples illustrate the features of the present invention.

[0049] The following materials were prepared as covering materials.

[0050] ·Coating material 1-1 A light gray coating material (L) whose main components are acrylic resin emulsion and pigments (titanium dioxide, carbon black, yellow iron oxide, extender pigments). * Value: 89.1, a * Value: -0.3, b * Value: 4.1, Glossiness: 11, Heat Residue: 54% by weight, Viscosity: 3.5 Pa·s, Opacity: 97%, Pigment Ratio: 130 parts by weight per 100 parts by weight of resin solids)

[0051] ·Coating material 1-2 A white coating material (L) mainly composed of acrylic resin emulsion and pigments (titanium dioxide, extender pigments) * Value: 97.4, a * Value: -0.4, b * Value: 1.6, Glossiness: 11, Heat Residue: 57% by weight, Viscosity: 5 Pa·s, Opacity: 97%, Pigment Ratio: 134 parts by weight per 100 parts by weight of resin solids, Color Difference △E with Coating Material 1-1: 8.7)

[0052] ·Coating material 2-1 A dark gray coating material (L) whose main components are acrylic resin emulsion and pigments (titanium dioxide, carbon black, extender pigments). * Value: 36.5, a * Value: -0.2, b * Value: -1.8, Glossiness: 10, Heat Residue: 40% by weight, Viscosity: 2.1 Pa·s, Opacity: 98%, Pigment Ratio: 140 parts by weight per 100 parts by weight of resin solids)

[0053] ·Coating material 2-2 A black coating material (L) whose main components are acrylic resin emulsion and pigments (carbon black, yellow iron oxide, extender pigments) * Value: 26.4, a * Value: 0.1, b * Value: -0.3, Glossiness: 10, Heat Residue: 56% by weight, Viscosity: 4.8 Pa·s, Opacity: 98%, Pigment Ratio: 138 parts by weight per 100 parts by weight of resin solids, Color Difference △E with Coating Material 2-1: 10.2)

[0054] • Clear paint 1 Clear coating primarily composed of acrylic resin emulsion (heat residue: 35% by weight, viscosity: 3.0 Pa·s) • Clear paint 2 Clear coating primarily composed of acrylic resin emulsion and calcined mica (average particle size 200 μm) (heat residue: 35% by weight, viscosity: 3.0 Pa·s, calcined mica ratio: 5 parts by weight per 100 parts by weight of resin solids)

[0055] (Example 1) As the first step, apply coating material 1-1 to the base material (slate board) at a rate of 120g / m². 2 The entire surface was then coated with a fibrous roller and allowed to dry for 24 hours to form a colored coating. Next, as the second step, clear paint 1 was applied at a rate of 20g / m². 2As shown in Figure 3, five types of sponge materials 1 to 5 (each sponge material being an irregularly shaped solid with a size of 2 to 18 mm) with different hardness and / or density were mixed together and applied to the cylindrical outer surface using a roller brush (outer diameter 45 mm, liquid absorption thickness 2 to 10 mm) with a random uneven surface. After drying for 24 hours, a discontinuous clear coating was formed. Painting and drying were all carried out under standard conditions. Using the above method, a highly aesthetic decorative coating surface with contrast due to differences in gloss (sheen) was obtained on a light gray colored coating surface. • Sponge material 1: Hardness 45-60N, density 50-100kg / m³ 3 • Sponge material 2: Hardness 75-110N, density 15-30kg / m 3 • Sponge material 3: Hardness 110-140N, density 15-50kg / m³ 3 • Sponge material 4: Hardness 110-300N, density 30-85kg / m³ 3 • Sponge material 5: Hardness 10-12kN, density 5-15kg / m³ 3

[0056] (Example 2) As the first step, apply coating material 1-1 to the base material (slate board) at a rate of 120g / m². 2 The entire surface was then coated with a fibrous roller and allowed to dry for 2 hours until it was dry to the touch or better. Next, coating material 1-2 was applied at a rate of 40g / m². 2 Sponge-like material (hardness 75-110N, density 15-30kg / m³) 3 The paint was applied discontinuously using a special tool, and allowed to dry for 24 hours to form a colored film surface. Next, as the second step, clear paint 1 was applied at a rate of 30 g / m². 2 The coating was applied using a roller brush similar to that used in Example 1, and allowed to dry for 24 hours to form a discontinuous clear coating. Painting and drying were all carried out under standard conditions. By this method, a highly aesthetic decorative coating surface was obtained in which light gray and white areas were mixed, and further contrast was created by differences in gloss (sheen).

[0057] (Example 3) As the first step, apply coating material 2-1 to the base material (slate board) at a rate of 120g / m². 2 The entire surface was then coated with a fibrous roller and allowed to dry for 2 hours until it was dry to the touch or better. Next, coating material 2-2 was applied at a rate of 50g / m². 2 Sponge-like material (hardness 75-110N, density 15-30kg / m³) 3 The paint was applied discontinuously using a special tool, and allowed to dry for 24 hours to form a colored film surface. Next, as the second step, clear paint 1 was applied at a rate of 30 g / m². 2 The coating was applied using a roller brush similar to that used in Example 1, and allowed to dry for 24 hours to form a discontinuous clear coating. Painting and drying were all carried out under standard conditions. By this method, a highly aesthetic decorative coating surface was obtained in which dark gray and black areas were mixed, and further contrast was created by differences in gloss (sheen).

[0058] (Example 4) As the first step, apply coating material 1-1 to the base material (slate board) at a rate of 120g / m². 2 The entire surface was then coated with a fibrous roller and allowed to dry for 24 hours to form a colored coating. Next, as the second step, clear paint 2 was applied at a rate of 20g / m². 2 The coating was applied using a roller brush similar to that in Example 1, and dried for 24 hours to form a discontinuous clear coating. Painting and drying were all carried out under standard conditions. By the above method, a highly aesthetic decorative coating surface was obtained in which the light gray colored coating surface partially reflects light (glitter) and has contrast due to differences in gloss (sheen).

Claims

1. A method for forming a decorative coating surface, A process of forming a colored film on the surface to be coated, The process involves applying a clear coating unevenly to the above-mentioned colored coating surface using a painting roller to form a discontinuous clear coating. Includes, The above clear coating contains a synthetic resin and a transparent powder. The above-mentioned transparent powder is selected from glass pulverized material, glass flakes, transparent resin flakes, mica, and calcined mica. The above clear coating forms a colorless, transparent clear film. A method for forming a decorative coating surface, characterized in that the above-mentioned painting roller is a roller brush in which at least two or more liquid-absorbing materials with different hardness and / or density are mixed on the cylindrical outer surface.

2. The method for forming a decorative coating surface according to claim 1, characterized in that the above-mentioned colored coating surface has at least two or more colored regions mixed together.

3. The method for forming a decorative coating surface according to claim 1, characterized in that the above-mentioned colored coating is a matte coating.

4. The method for forming a decorative coating surface according to claim 1, characterized in that the above-mentioned colored coating has a specular gloss of 40 or less.

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