Method for forming decorative coating surface

Abstract

To provide a method for forming a decorative coating surface that has a complicated natural pattern and that has high beauty.SOLUTION: A method for forming a decorative coating surface according to the present invention includes the steps of: forming a first coating by applying a first coating material to the whole coating surface; and forming a second coating by discontinuously applying a second coating material onto the first coating. As an applicator for use in applying the second coating material, used is a roller or a presser. The first coating is a coating having uneven color tones and / or glossiness.SELECTED DRAWING: None

Description

[Technical field]

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

[0002] Conventionally, decorative coatings having various patterns have been formed on the wall surfaces of buildings, civil engineering structures, etc. In particular, in recent years, as many highly designed buildings are being designed, various decorative coatings are required, such as natural stone, wood grain, metal, leather, ceramic (glaze) and antique looks. One example of such decorative coatings is a decorative coating in which a pattern is formed by partially applying multiple coating materials over each other.

[0003] For example, Patent Document 1 describes a method of applying a colored base paint to the entire surface, and then applying multiple colored paints of different colors in a spotted pattern on the surface to create a colorful pattern. However, the spotted pattern in Patent Document 1 may end up looking monotonous and artificial. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2000-140750 A Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE PRESENT EMBODIMENT The present invention has been made in consideration of the above problems, and has as its object to provide a method for forming a decorative coating surface having a complex and natural pattern and a highly aesthetic appearance. [Means for solving the problem]

[0006] In order to solve these problems, the inventors conducted extensive research and came up with the idea of ​​a method for forming a decorative coating surface in which a first coating material is applied to the entire surface to be coated to form a specific first coating, and then a second coating material is applied discontinuously, thereby completing the present invention.

[0007] That is, the present invention has the following features. 1. Apply the first coating material to the surface to be coated. Spread in random directions A process of applying the coating to the entire surface to form a first coating; applying a second coating material discontinuously onto the first coating to form a second coating; As an application tool for applying the second coating material, At least two types of sponge materials with different hardness and / or density are randomly mixed. Use a roller or pressure tool to the first coating material is a metallic coating material containing a scale-like pigment, A method for forming a decorative coating surface, wherein the first coating is a coating having non-uniform color tone and / or gloss. 2. The method for forming a decorative coating surface according to claim 1, wherein the second coating material contains a scale-like pigment. Effect of the Invention

[0008] The present invention includes a step of applying a first coating material to the entire surface to be coated to form a first film, and a step of applying a second coating material discontinuously on top of the first coating to form a second coating, and since the first coating is a coating having a non-uniform color tone and / or gloss, it is possible to obtain a highly aesthetic decorative coating surface having a complex, natural pattern. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 shows an example of a decorative coating surface formed according to the present invention, in which (I) is a front view and (II) is a cross-sectional view. [Diagram 2] FIG. 2 is a cross-sectional view showing an example of a pressing tool that can be used in the present invention. [Diagram 3] FIG. 3 is a cross-sectional view showing an example of a roller that can be used in the present invention. [Figure 4]FIG. 4 is a front view showing an example of a decorative coating surface formed according to the present invention. [Explanation of symbols]

[0010] 1. Decorative coating surface 1a. Colored area A 1b. Colored area B 1c. Colored area C 11.First coating 12.Second coating 2. Pressing tool 2a~2e. Sponge material 2f. Height direction 3. Roller 3a~3e. Sponge material 3f. Cylinder outer surface 3g. Outer diameter direction of cylinder 4.Surface to be coated DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described.

[0012] The present invention includes a step of applying a first coating material to the entire surface of a coating object to form a first coating, and a step of applying a second coating material discontinuously on the first coating to form a second coating, the first coating being a coating having non-uniform color tone and / or gloss. When viewed from the front, the decorative coating surface formed by the present invention has an intricate pattern formed by mixing the first and second coatings.

[0013] FIG. 1 shows an example of a decorative coating surface formed by the present invention [FIG. 1(I): front view, (II): cross-sectional view of X-X' portion]. According to the method for forming a decorative coating surface of the present invention, when viewed from the front as in FIG. 1(I), a coating is obtained in which a colored region A [FIG. 1(I): 1a] and a colored region B [FIG. 1(I): 1b] are mixed. As shown in FIG. 1(II), this coating is formed by forming a first coating [FIG. 1(II): 11] over the entire surface of the coating surface [FIG. 1(II): 4], and then laminating a second coating [FIG. 1(II): 12] discontinuously on the first coating, and when viewed from the front, the first coating portion is visually recognized as the colored region A, and the laminated portion of the first coating and the second coating is visually recognized as the colored region B. In addition, the color tone and / or gloss of the colored region A by the first coating is non-uniform, so that a decorative coating surface with a high aesthetic appearance having a complex and natural pattern can be formed.

[0014] The method for forming the decorative coating surface shown in FIG. 1 will be described below as an example.

[0015] The method for forming the decorative coating surface shown in FIG. 1 is as follows: (First step) A step of applying the first coating material to the entire surface to be coated to form the first coating. (Second step) A step of discontinuously applying a second coating material onto the first coating to form a second coating. In this case, for example, the first coating forms a colored region A [FIG. 1(I): 1a], and the second coating forms a colored region B [FIG. 1(I): 1b].

[0016] In the first step, the first coating formed by the first coating material is a coating having a non-uniform color tone and / or gloss, and is characterized in that it is formed by one type of coating material. In the present invention, "non-uniform color tone" refers to a first coating formed on a substrate surface in which at least two or more regions having different color tones are visible. More specifically, a mixture of regions having a color difference (ΔE) of preferably 0.5 or more (more preferably 1 or more). The upper limit of the color difference is not particularly limited, but is preferably 90 or less, and can be set according to the desired design. For example, when forming a calm design with a sense of unity while providing contrast, it is preferable that the upper limit of the color difference (ΔE) is 20 or less. On the other hand, when forming an accent design with a clear contrast between colored regions, it is preferable that the color difference (ΔE) is more than 20 and 90 or less.

[0017] Moreover, "non-uniform gloss" refers to at least two or more areas with different gloss levels being visible in the first coating formed on the substrate surface. More specifically, the difference in gloss level is preferably 1 or more (more preferably 2 or more). The upper limit of the difference in gloss level is preferably 90 or less (more preferably 60 or less). By having a difference in gloss level, it is possible to form a coating having contrast and three-dimensional shadows, and thus having a high aesthetic appearance.

[0018] In the present invention, the color difference (ΔE) is a value measured using a colorimeter. * Value, a * Value, b * The values ​​can be measured and calculated using the following formula. <Formula>△E={(L *1 -L *2 ) 2 +(a *1 -a *2 ) 2 +(b *1 -b *2 ) 2} 0.5 (In the formula, L *1 , a *1 , b *1are the L of the first measurement point, respectively. * , a * , b * .L *2 , a *2 , b *2 are the L of the second measurement point, respectively. * , a * , b * )

[0019] The term "glossiness" refers to a value measured in accordance with JIS K5600-4-7 "specular glossiness." Specifically, the value is obtained by measuring the specular glossiness (measurement angle 60 degrees) of each of the portions of the formed coating that have different glossiness.

[0020] The first coating film having non-uniform color tone and / or gloss as described above can be, for example, (I) The type of the first coating material (e.g., multicolored paint, coating material containing special pigment, etc.); (II) Application method of the first coating material (e.g., application tool, application thickness, etc.), (III) Type of coated surface (e.g., uneven pattern, material, surface properties, absorption, repelling, etc.), In the present invention, a method that combines the above (I) and (II) is particularly suitable, and is suitable for forming a pattern with unclear boundaries, such as an uneven pattern, a blurred pattern, a wavy pattern, or a flickering pattern.

[0021] The amount of the first coating material to be applied may be appropriately determined taking into consideration the type and condition of the surface to be coated, the finish, etc., but is preferably 30 to 500 g / m 2 (More preferably 80 to 400 g / m 2 , and more preferably 90 to 300 g / m 2 When the coating amount of the first coating material satisfies the above range, a continuous coating film that covers the entire surface to be coated is easily formed. Furthermore, the coating amount of the first coating material applied to the entire surface of the surface to be coated is preferably 10 to 500 g / m2 in terms of solid content. 2 , more preferably 20 to 400 g / m 2 In the present invention, "a to b" is synonymous with "a or more and b or less."

[0022] The first coating material can be diluted with various solvents when applied. The dilution ratio of the first coating material is preferably 0 to 50% by weight (more preferably 1 to 50% by weight, more preferably 2 to 40% by weight) based on the coating material. In this case, a coating film with non-uniform color tone and / or gloss can be formed more efficiently. The viscosity of the first coating material when applied is preferably 0.1 to 8 Pa·s (more preferably 0.5 to 6 Pa·s). In such a case, a continuous coating film that covers the entire surface of the coating surface is likely to be formed, and a coating film with non-uniform color tone and / or gloss is likely to be formed. The viscosity is a value (indicator value at the fourth rotation) measured using a BH type viscometer (rotation speed 20 rpm) under standard conditions (temperature 23°C, relative humidity 50%).

[0023] When applying the first coating material, it is sufficient to apply the first coating material to the entire surface of the surface to be coated, and examples of the application tools that can be used include sprays, rollers, brushes (including brushes, etc.), and pressing tools (including beaters, etc.). Among these, examples of the rollers include fibrous rollers and porous (sponge) rollers, and examples of the pressing tools that can be used include those having sponges, felt, woven fabrics, nonwoven fabrics, etc. In the present invention, it is particularly preferable to use rollers and / or brushes, and it is further preferable to spread the material in random directions and apply it to the entire surface of the surface to be coated. This makes it easy to form a coating with uneven color tone and / or gloss.

[0024] In the second step, the second coating material applied on the first coating is not particularly limited, and various coating materials can be used. In the present invention, it is preferable to use a coating material of a different color from the first coating material as the second coating material. The different color means that the color difference (ΔE) between the first coating material and the second coating material is preferably 3 or more (more preferably 5 or more). The upper limit of the color difference is not particularly limited, but is preferably 90 or less, and can be set according to the desired design. For example, when forming a calm design with a sense of unity while providing contrast, it is preferable that the upper limit of the color difference (ΔE) is 20 or less. On the other hand, when forming an accent design with a clear contrast between colored areas, it is preferable that the color difference (ΔE) is more than 20 and 90 or less.

[0025] The second coating material may have a glossiness different from that of the first coating material. The difference in glossiness is preferably 2 or more (more preferably 3 or more, and even more preferably 5 or more). The upper limit of the difference in glossiness is preferably 90 or less (more preferably 60 or less). By having a difference in glossiness, it is possible to form a coating film with contrast and three-dimensional shadows, which has a high aesthetic appearance.

[0026] The color difference (△E) between the first and second coating materials is a value measured using a colorimeter. Specifically, each coating material is applied to a standard white paper using a film applicator with a gap of 250 μm, and the coating surface is placed horizontally and dried for 48 hours under standard conditions (temperature 23°C, relative humidity 50%. The same applies below.) The L of the coating is * Value, a * Value, b * It can be calculated using the following formula from the value (average value of 10 or more measurement points). <Formula>△E={(L *1 -L *2 ) 2 +(a *1 -a *2 ) 2 +(b *1 -b *2 ) 2} 0.5 (In the formula, L *1 , a*1 , b *1 are the L of the first coating material, respectively. * , a * , b * .L *2 , a *2 , b *2 are the L of the second coating material, respectively. * , a * , b * )

[0027] The "glossiness" is a value measured according to JIS K5600-4-7 "Specular glossiness." Specifically, the coating material is applied to one side of a glass plate using a film applicator with a gap of 150 μm, the coated surface is placed horizontally, and the plate is dried under standard conditions for 48 hours, after which the specular glossiness (measurement angle 60 degrees, average value of 10 or more measurement points) is measured.

[0028] The amount of the second coating material applied may be appropriately determined depending on 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, and is preferably 100 g / m 2 Less than or equal to 5 to 90 g / m 2 , and more preferably 10 to 80 g / m 2 When the amount of the second coating material applied satisfies the above range, a discontinuous coating is easily formed, and a decorative coating surface having an intricate pattern with a mixture of the first and second coatings can be stably formed. The amount of the discontinuously applied second coating material is preferably 100 g / m2 in terms of solid content. 2 or less, more preferably 1 to 80 g / m 2 , and more preferably 5 to 40 g / m 2 In the present invention, a preferred embodiment is one in which the amount of the second coating material applied is less than the amount of the first coating material applied.

[0029] The second coating material can be diluted with various solvents when applied. The dilution ratio of the second coating material is preferably 1 to 50% by weight (more preferably 2 to 40% by weight). This makes it easier to form a discontinuous coating. In the present invention, the dilution ratio of the second coating material can also be smaller than the dilution ratio of the first coating material.

[0030] The viscosity of the second coating material during application is preferably 0.5 to 10 Pa·s (more preferably 1 to 9.5 Pa·s). In this case, an appropriate amount of the coating material is contained in the applicator, and a discontinuous coating is easily formed, improving the design. The viscosity of the second coating material can also be made higher than that of the first coating material.

[0031] In the second step, the timing of applying the second coating material is not particularly limited, but is preferably after the first coating material (the coating material applied first) has become non-flowing. This makes it possible to provide a stable finish and a decorative coating with high aesthetics that is less likely to mix with each other. In particular, when the surface to be coated is large in area, a remarkable effect can be obtained. In the present invention, the "non-flowing state" refers to a state in which the coating loses fluidity after the first coating material is applied, and specifically refers to a state in which the coating is dried and cured to such an extent that the coating does not bleed even when the second coating material is applied, or the coating materials do not mix with each other. This "non-flowing state" also includes states such as touch-dry, semi-cured dry, and cured dry as specified in JIS K5400. In the present invention, it is preferable to apply the second coating material after the first coating material has dried to the touch (more preferably after semi-cured dry, and even more preferably after cured dry). In the present invention, the drying and curing may be preferably performed at room temperature (5 to 40°C).

[0032] Examples of application tools that can be used when applying the second covering material include sprays, rollers, brushes (including paintbrushes), and pressing tools (including beaters). Among these, examples of rollers include fibrous rollers and porous (sponge) rollers, and examples of pressing tools that can be used include those having sponges, felt, woven fabrics, nonwoven fabrics, etc.

[0033] In the second step, in the step of discontinuously applying the second coating material, for example, a roller, a brush, a pressing tool, or the like may be used to apply the coating material to the surface to be coated so that the coating material is partially applied. To apply the second coating material discontinuously, an application tool may be brought into intermittent (partial) contact with the surface to be coated, and for example, a method of applying the coating material by pressing, a method of applying the coating material by tapping, a method of applying the coating material while rubbing, or the like may be adopted. When applying the coating material discontinuously, an application tool having a sponge material is particularly suitable, and a roller or pressing tool having a sponge material is more suitable. When using a roller having a sponge material, it is preferable to apply the coating material by rolling discontinuously, that is, to contact and roll the roller intermittently (partially) with the surface to be coated. At this time, it is preferable to contact and roll the roller in a random direction. By using such an application tool, the effect of making the boundaries between the colored regions nonlinear (intricate) is further enhanced, and the aesthetic appearance can be further improved.

[0034] As the sponge material, for example, a resin such as an acrylic resin, a urethane resin, an ester resin, or an ethylene resin that has been made porous in a sponge form can be used. The hardness of the sponge material is preferably 10 to 3000 N, more preferably 20 to 2000 N, and even more preferably 30 to 1500 N. The density of the sponge material is preferably 1 to 300 kg / m 3 , more preferably 3 to 200 kg / m 3 , more preferably 5 to 150 kg / m 3 Here, "hardness" refers to the hardness (C method) value measured from the force applied 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.

[0035] The shape of the sponge material may be, for example, a polygonal cross section such as a triangle, a square, a rhombus, a pentagon, a hexagon, etc., a curved shape such as a circle, an ellipse, a drop shape, etc., or an irregular shape, or a combination of these shapes. The size may be appropriately set according to the desired pattern.

[0036] As the sponge material, one type of sponge material satisfying the above conditions can be used, but it is preferable to apply it by using, for example, a pressing tool in which at least two types of sponge materials (2a to 2e in FIG. 2) with different hardness and / or density are randomly mixed, as shown in FIG. 2, or a roller in which at least two types of sponge materials (3a to 3e in FIG. 3) with different hardness and / or density are mixed on the cylindrical outer peripheral surface (3f in FIG. 3) as shown in FIG. In such an application tool, it is sufficient that at least one type (preferably two or more types) of sponge material satisfies the above conditions. By using such a specific application tool, the finish quality, aesthetics, etc. can be further improved.

[0037] 2 and 3, the sponge material is preferably fixed in a piled-up state, and more preferably compressed and molded so that a large number of sponge materials are randomly mixed.

[0038] The sponge material in Fig. 2 and Fig. 3 has an irregular three-dimensional shape, and each of the sponge materials has a size of preferably 1 to 30 mm (more preferably 2 to 20 mm). In the present invention, it is preferable that a large number of sponge materials of different sizes are mixed. In such a case, irregular uneven shapes are easily formed between the sponge materials, so that the effect of the present invention can be further improved. 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 square of a predetermined dimension on one side. The thickness of the sponge material (thickness in the 2f direction in Fig. 2, thickness in the 3g direction in Fig. 3) is preferably 2 to 50 mm (more preferably 3 to 30 mm), depending on the size of each sponge material.

[0039] Fig. 4 shows another example (front view) of a decorative coating surface formed by the method of forming a decorative coating surface of the present invention. Fig. 4 shows a decorative coating surface formed by applying three types of coating materials, a first coating material, a second coating material, and a third coating material, in that order, to form a decorative coating surface having a colored area A by the first coating material, a colored area B by the second coating material, and a colored area C by the third coating material (Fig. 4: 1a to 1c). The decorative coating surface shown in Fig. 4 can be formed by the same method as in Fig. 1 above, for example, (First step) A step of applying the first coating material to the entire surface to be coated to form the first coating. (Second step) A step of discontinuously applying a second coating material onto the first coating to form a second coating. (Third step) A step of discontinuously applying a third coating material The method can be formed by a method including the steps of:

[0040] The amount of the third coating material applied is preferably 100 g / m 2 Less than or equal to 2 to 80 g / m 2 , and more preferably 5 to 60 g / m 2 ) In addition, it is preferable that the amount of the third coating material applied is less than the amounts of the first and second coating materials applied. In addition, the amount of the third coating material applied discontinuously is preferably 100 g / m2 in terms of solid content. 2 or less, more preferably 1 to 60 g / m 2 , and more preferably 2 to 30 g / m 2 and it is preferable that the amount of coating is less than the amount of coating of the first coating material and the second coating material. Also, when four or more different coating materials are used, the coating materials (first coating material, second coating material, third coating material, fourth coating material, ..., etc.) are applied in the same manner as above (first step, second step, third step, fourth step, ..., etc.) to form a decorative coating surface having colored region A, colored region B, colored region C, colored region D, ..., etc.

[0041] In addition, in the method for forming a decorative coating surface of the present invention, after forming a decorative coating surface by the above steps, at least one of the coating materials used in each step can be selected and applied discontinuously using, for example, a roller, a brush, a pressing tool, etc., to adjust the pattern. This makes it possible to obtain a decorative coating surface with a good balance (arrangement) of the pattern and a high aesthetic appearance.

[0042] In the method for forming a decorative coating surface of the present invention, a clear coating material can be applied to the outermost surface to provide a clear layer for the purposes of surface protection, improving weather resistance, stain resistance, etc., as long as the effects of the present invention are not impaired.

[0043] <Surface to be coated> The coated surface in the present invention is preferably a substrate surface of a building, civil engineering structure, etc., particularly a substrate constituting the surface of an interior or exterior wall, ceiling, fittings, etc. Examples of such substrates include gypsum board, concrete, mortar, porcelain tile, brick, cement board, fiber-mixed cement board, cement calcium silicate board, perlite board, ALC board, siding board, extrusion molding board, plywood, wood board, steel plate, plastic plate, glass plate, etc. The surface of these substrates may be subjected to some surface treatment (e.g., sealer, surfacer, filler, etc.), may already have a coating film formed thereon, or may have wallpaper attached thereon.

[0044] <Coating material> First, common features of the coating materials (first coating material, second coating material, third coating material, etc.) of the present invention will be described. The coating material used in the present invention may contain a resin and a pigment. 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 the resin and the pigment is preferably 5 to 500 parts by weight (more preferably 10 to 400 parts by weight) of the pigment per 100 parts by weight of the resin solid content.

[0045] Examples of the resin include water-soluble resins, water-dispersible resins, solvent-soluble resins, solventless resins, non-water-dispersible resins, and the like, or composites thereof. These may have crosslinking reactivity, and the form is not particularly limited, and may be either one-liquid type or two-liquid type. In the present invention, water-dispersible resins and / or water-soluble resins are particularly preferably used. Examples of the types of resins that can be used 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, and the like, or composites thereof. In the present invention, hydraulic binders such as cement can be used as long as they do not impair the effects of the present invention, but it is preferable not to use them because they may limit the color of the coating.

[0046] As the pigment, known color pigments, extender pigments, etc. can be used. Among them, examples of color pigments include titanium oxide, zinc oxide, carbon black, lamp black, bone black, graphite, black iron oxide, copper chrome 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, fast yellow, benzimidazolone yellow, chrome green, cobalt green, phthalocyanine green, ultramarine blue, Prussian blue, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet, colored mica, metal flake pigments, pearl pigments, and luster pigments. By using one or more of these color pigments, it is possible to color the material to any hue.

[0047] Examples of the extender pigment include heavy calcium carbonate, kansui stone, light calcium carbonate, white carbon, talc, mica, kaolin, clay, china clay, diatomaceous earth, barite powder, barium sulfate, precipitated barium sulfate, silica sand, silica stone 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, the mixing ratio, etc., the coating material can be adjusted to a desired glossiness.

[0048] In addition to the above components, the coating material of the present invention may contain known additives, such as aggregates, dyes, thickeners, wetting agents, antifreeze agents, film-forming assistants, preservatives, antifungal agents, anti-algae agents, antibacterial agents, dispersants, antifoaming agents, UV absorbers, light stabilizers, antioxidants, catalysts, diluting solvents, etc., within the scope of not significantly impairing the effects of the present invention. The coating material can be produced by uniformly mixing the above-mentioned components by a conventional method.

[0049] As the first coating material of the present invention, any material containing the above-mentioned components can be used, but it is preferable that the first coating material is capable of forming a coating film with non-uniform color tone and / or gloss by application. As such a first coating material, for example, a multicolored pattern paint, a coating material containing a special pigment, etc. are suitable, and in particular, a coating material containing a scale-like pigment as the special pigment is preferable. Examples of the scale-like pigment include colored mica, metal flake pigments, pearl pigments, glitter pigments, mica, etc., and one or more of these can be used. In the present invention, it is particularly preferable to contain a metal flake pigment (more preferably an aluminum flake pigment). When such a scale-like pigment is contained, a coating film with non-uniform color tone and / or gloss is easily formed by randomly or by agglomerating and unevenly distributing the scale-like pigment, and a complex and natural pattern can be formed. In addition, the coating film formed in this way can have a calm metallic appearance, and is therefore suitable for use in buildings, civil engineering structures, etc.

[0050] The mixing ratio of the resin and the scaly pigment is preferably 5 to 200 parts by weight (more preferably 10 to 100 parts by weight) of the scaly pigment per 100 parts by weight of the resin solid content. In such a case, a coating having non-uniform color tone and / or gloss is likely to be formed, and the effect of the present invention can be further enhanced.

[0051] The second coating material of the present invention may contain the above-mentioned components and may be the same as or different from the first coating material. In the present invention, the second coating material preferably contains the above-mentioned scaly pigment. This allows the formed second coating to have a non-uniform color tone and / or luster, allowing the formation of a more complex and natural pattern, and improving the aesthetic appearance.

[0052] The heating residue of the coating material is preferably 10% by weight or more, more preferably 15 to 80% by weight. The heating residue is a value measured by the method of JIS K5601-1-2, the heating temperature is 105° C., and the heating time is 60 minutes. EXAMPLES

[0053] The following examples will clarify the features of the present invention.

[0054] The following coating materials were prepared:

[0055] ·Coating material 1-1 Red metallic coating material mainly composed of acrylic resin emulsion and pigment (aluminum flake pigment, red iron oxide) (heating residue: 20% by weight, viscosity: 2.0 Pa s, pigment ratio: 35 parts by weight per 100 parts by weight of resin solids)

[0056] ·Coating material 1-2 Silver-based metallic coating material with acrylic resin emulsion pigment (aluminum flake pigment) as the main component (heating residue: 24% by weight, viscosity: 3.6 Pa·s, pigment ratio: 38 parts by weight per 100 parts by weight of resin solids)

[0057] ·Coating material 2-1 Beige metallic coating material mainly composed of acrylic resin emulsion and pigments (aluminum flake pigment, yellow iron oxide, titanium oxide) (heating residue: 20% by weight, viscosity: 2.3 Pa s, pigment ratio: 38 parts by weight per 100 parts by weight of resin solids)

[0058] ·Coating material 2-2 A gold-colored metallic coating material whose main component is acrylic resin emulsion pigment (aluminum flake pigment, yellow iron oxide) (heating residue: 24% by weight, viscosity: 3.8 Pa·s, pigment ratio: 36 parts by weight per 100 parts by weight of resin solids)

[0059] Example 1 In the first step, the coating material 1-1 was applied to the substrate (slate board) at a coating weight of 120 g / m 2 The entire surface was coated with a roller (a fiber roller) in a random direction, and the coating was dried for 2 hours until the surface was dry to the touch, forming a reddish metallic coating film with an uneven color tone and a mottled pattern. Next, in the second step, Coating Material 1-2 was applied in an amount of 40 g / m 2 Sponge material (hardness 110-140N, density 15-50kg / m 3 ) was used] and dried for 24 hours. All painting and drying was carried out under standard conditions. By using the above method, a highly aesthetic decorative coating surface was obtained, with a complex mixture of red metallic areas with uneven patterns and silver metallic areas.

[0060] Example 2 In the first step, the coating material 2-1 was applied to the substrate (slate board) at a rate of 120 g / m 2 The coating was then applied to the entire surface in a random direction using a roller (a fiber roller was used), and dried for 2 hours until the surface was dry to the touch, forming a beige metallic coating film with an uneven color tone and a mottled pattern. Next, in the second step, Coating Material 2-2 was applied in an amount of 50 g / m 2 The mixture was applied discontinuously with a roller (using rollers with five types of sponge materials as shown in Figure 3). Sponge material 3a: hardness 45-60N, density 50-100kg / m 3, Sponge material 3b: hardness 75~110N, density 15~30kg / m 3 , Sponge material 3c: Hardness 110~140N, Density 15~50kg / m 3 , Sponge material 3d: Hardness 110~300N, Density 30~85kg / m 3 , Sponge material 3e: Hardness 1000~1500N, Density 10~20kg / m 3 ) and dried for 24 hours. All painting and drying was done under standard conditions. By using the above method, a highly aesthetic decorative coating surface was obtained, with a complex mixture of beige metallic areas with uneven patterns and gold metallic areas.

Claims

1. A step of spreading the first coating material over the entire surface of the substrate in random directions to form a first coating film; applying a second coating material discontinuously onto the first coating to form a second coating; A roller or a pressing tool having at least two or more kinds of sponge-like materials having different hardness and / or density randomly mixed therein is used as an application tool for applying the second coating material, the first coating material is a metallic coating material containing a scaly pigment, A method for forming a decorative coating surface, wherein the first coating is a coating having non-uniform color tone and / or gloss.

2. 2. The method for forming a decorative coating surface according to claim 1, wherein the second coating material includes a scale-like pigment.

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