Film formation method

Abstract

To obtain an ornamental film surface with excellent texture, natural color and excellent appearance.SOLUTION: A film formation method of the invention forms an ornamental film surface on which at least two types of colored areas are mixed and it comprises a step of applying a coating material (p) to a surface to be applied and forming a colored film (P) and a step of applying the coating material (q) using an applicator and forming a design film (Q) after the colored film (P) goes into a not-fluid state.The coating material (p) and the coating material (Q) have different colors and both have a heating residue equal to or greater than 25 wt.%. The applicator has a liquid-absorbable layer in which at least two types of liquid-absorbable materials having different hardness and / or density are mixed. The liquid-absorbable layer has such a shape that the outer peripheral edges of the surface to be coated have been removed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a coating method capable of forming a novel 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. 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 in which an undercoat paint is applied to the entire surface, and then a paint (patterning paint) of a darker color than the undercoat paint is applied before the undercoat paint dries to create a pattern. However, in Patent Document 1, the patterning paint is applied before the undercoat paint dries, so the undercoat paint and the patterning paint tend to mix on the surface to be coated, which may reduce the contrast in color, texture, etc. In addition, Patent Document 1 can only obtain a flat pattern. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-266911 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a method for forming a decorative coating surface which has excellent texture, natural coloring, 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 coating formation method in which a specific number of coating materials are applied to a surface to be coated using a specific applicator, thereby completing the present invention.

[0007] That is, the present invention has the following features.

[0008] 1. A coating forming method for forming a decorative coating surface having at least two or more types of colored regions, comprising the steps of: A process of applying a coating material (p) to a surface to be coated to form a colored coating (P); The method includes a step of applying a coating material (q) using an applicator to form a pattern coating (Q) after the color coating (P) has become non-flowable, The coating material (p) and the coating material (q) are different in color and each has a heating residue of 25% by weight or more, The applicator has a liquid-absorbent layer in which at least two or more types of liquid-absorbent materials having different hardness and / or density are mixed, and the liquid-absorbent layer has an edge portion on the outer periphery of the application surface. Random Removal processing The uneven shape is A coating forming method comprising the steps of: 2. The liquid-absorbent layer is formed on the edge of the outer periphery of the application surface. However, random removal by plucking and scraping 1. The method for forming a coating according to 1, characterized in that the coating has an uneven shape. Effect of the Invention

[0009] According to the present invention, it is possible to obtain a decorative coating surface that has excellent texture, natural coloring, and a highly aesthetic appearance. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a front view showing an example of a decorative coating surface formed according to the present invention. [Diagram 2] FIG. 2 shows an example of the applicator of the present invention. [Diagram 3] FIG. 3 shows an example of the applicator of the present invention. [Figure 4] FIG. 4 shows an example of a conventional applicator. [Diagram 5] FIG. 5 shows an example of the applicator of the present invention. [Figure 6] FIG. 6 shows an example of the applicator of the present invention. [Explanation of symbols]

[0011] 1: Decorative coating surface P: Colored area P Q: Colored area Q A: Liquid absorbent layer a1~a5: Liquid absorbing material A: Painted surface Ae: Edge part At: thickness direction B: Support part C: Handle DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described.

[0013] The present invention is a coating method for forming a decorative coating surface having at least two or more types of colored regions, which includes a step of applying a coating material (p) to a surface to be coated to form a colored coating (P) and a step of applying a coating material (q) to form a patterned coating (Q), characterized in that a specific coating material is used for each step, and the coating material (q) is applied with a specific applicator. The decorative coating surface formed by the present invention has at least two or more types of colored regions (e.g., colored region P, colored region Q, ...) mixed together when viewed from the front.

[0014] An example (front view) of a decorative coating surface formed by the present invention is shown in Fig. 1. According to the coating formation method of the present invention, when viewed from the front as in Fig. 1, a colored area P (Fig. 1: P) by the colored coating (P) and a colored area Q (Fig. 1: Q) by the patterned coating (Q) are mixed, and a decorative coating surface with excellent texture and natural coloring and high aesthetic appearance can be formed.

[0015] <Surface to be coated> Examples of the surface to be coated include the surfaces of substrates such as buildings and civil engineering structures, specifically the surfaces of interior and exterior walls, ceilings, and fittings. Examples of substrates constituting these surfaces to be coated include gypsum boards, concrete, mortar, porcelain tiles, bricks, cement boards, fiber-mixed cement boards, cement calcium silicate boards, perlite boards, ALC boards, siding boards, extrusion-molded boards, plywood, wood boards, steel boards, plastic boards, and glass boards. The surfaces of these substrates may be those that have been subjected to some surface treatment, may already have a coating film formed thereon, or may have wallpaper attached thereto. In addition, a primer material or the like may be applied to the surface of the substrate before the coating material (p) is applied. Examples of such primer materials include known primer materials (e.g., sealers, surfacers, fillers, etc.). The color tone of such primer materials can be appropriately set, and for example, they can be the same color or the same color as the coating material (p).

[0016] <Coating material (p), coating material (q)> The coating material (p) and the coating material (q) can be of different colors, and specifically, it is preferable to use coating materials having a color difference (ΔE) of 3 or more (more preferably 5 or more). In this way, by using coating materials having different colors, it is possible to form a coating film having a high aesthetic appearance with contrast between the colored regions. 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 is 30 or less. On the other hand, when forming an accent design with a clear contrast between the colored regions, it is preferable that the color difference is more than 30 and 90 or less.

[0017] In the present invention, the color difference (ΔE) is a value measured using a colorimeter. Specifically, each coating material is applied to a standard white paper in an amount of 1 kg / m. 2 The coating was applied with a 100% RH coating, placed horizontally and dried for 48 hours under standard conditions (temperature 23°C, relative humidity 50%; same below). * Value, a * Value, b *It can be calculated using the following formula from the value (average value of three 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 coating material (p), * , a * , b * .L *2 , a *2 , b *2 are the L of the coating material (q), * , a * , b * )

[0018] In the present invention, various multicolor patterns can be formed by combining coating materials (p) and (q) of any color tone that satisfies the above conditions. Furthermore, in the present invention, by applying the coating material (q) using a specific applicator, a discontinuous pattern coating is formed on the colored coating, and a decorative coating having a pattern with excellent texture and natural coloring can be obtained. As a result, in the present invention, it is also possible to easily form, for example, a weathered stone (earthen wall) pattern, a rust-like pattern, etc.

[0019] The coating materials [coating materials (p) and (q)] in the present invention can be those having a heating residue of 25% by weight or more. For example, those containing a resin, a color pigment, and a filler can be used as such coating materials. In the present invention, the color tone, heating residue, etc. can be set by adjusting the type and mixing ratio of the color pigment and / or the filler. In the present invention, by using such homogeneous coating materials as the coating materials (p) and (q), a natural aesthetic appearance can be obtained without any sense of incongruity in the overall texture.

[0020] 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.

[0021] Examples of color pigments include titanium oxide, 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, fast yellow, benzimidazolone yellow, chrome green, cobalt green, phthalocyanine green, ultramarine blue, Prussian blue, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet, aluminum pigments, pearl pigments, and luster pigments.

[0022] By using one or more of these color pigments, the coating material can be colored to a desired color tone. The mixing ratio of the color pigment is preferably 3 to 500 parts by weight (more preferably 5 to 300 parts by weight, and even more preferably 10 to 200 parts by weight) relative to 100 parts by weight of the resin solid content. In the present invention, "a to b" is synonymous with "a or more and b or less."

[0023] As the filler, for example, known extender pigments, aggregates, etc. can be used. Specifically, as the filler, for example, heavy calcium carbonate, kansui stone, light calcium carbonate, white carbon, talc, kaolin, 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. can be mentioned. These can be used alone or in combination of two or more. As the filler, those having an average particle diameter of preferably 1 μm to 5 mm can be used. Specifically, as the extender pigment, those having an average particle diameter of preferably 1 to 50 μm can be used. The particle diameter of the extender pigment is the average value measured using a laser diffraction type particle size distribution measuring device (measurement conditions are distribution standard: volume, refractive index: 1.60-0.10i). On the other hand, as the aggregate, those having an average particle diameter of more than 50 μm and 5 mm or less can be used. The average particle size of the aggregate is a value obtained by sieving the aggregate using a metal mesh sieve specified in JIS Z8801-1:2000 and calculating the average value of the weight distribution.

[0024] In the present invention, by appropriately setting the type of filler, the mixing ratio, etc., the coating material can be adjusted to a desired heating residue, and it is also possible to impart a three-dimensional texture. It is also possible to impart a texture with reduced gloss (texture, touch, etc.). The mixing ratio of the filler is preferably 150 to 2000 parts by weight (more preferably 250 to 1800 parts by weight, and even more preferably 350 to 1600 parts by weight) relative to 100 parts by weight of the resin solid content.

[0025] In addition to the above components, the coating material may contain known additives, such as 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.

[0026] In the present invention, the heating residue of the coating material is 25% by weight or more, preferably 45 to 95% by weight, and more preferably 55 to 90% by weight. In the present invention, the heating residue of the coating material is within such a range, which is suitable for imparting contrast and texture, and further shortens the time required for drying and curing, and allows a non-flowing state to be obtained quickly. The heating residue is a value measured by the method of JIS K5601-1-2, and the heating temperature is 105°C and the heating time is 60 minutes.

[0027] <Applicator> FIG. 2 shows a perspective view of the applicator of the present invention. The applicator of the present invention comprises a specific liquid-absorbent layer, and the liquid-absorbent layer is characterized in that the edge portion of the outer periphery of the application surface has been removed.

[0028] Fig. 3 shows a cross-sectional view [Fig. 2: X-X'] of the liquid-absorbent layer of Fig. 2. The liquid-absorbent layer of the present invention is characterized by the mixture of at least two or more types of liquid-absorbent materials with different hardness and / or density [Fig. 3: a1-a5]. By using such a specific liquid-absorbent layer, a natural color pattern with a mixture of different colors can be easily and effectively imparted.

[0029] The liquid-absorbing material is not particularly limited as long as it can contain a coating material, but examples include felt, nonwoven fabric, sponge material (urethane-based, melamine-based, acrylic-based, nylon-based), etc., and at least two or more (preferably three or more) types of these materials differing in either or both of hardness and density are used in combination. In the present invention, it is preferable to use a combination of two or more (preferably three or more) types of sponge material (preferably including a urethane-based sponge material). 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 / m 3 (More preferably 3 to 200 kg / m 3 , and more preferably 5 to 150 kg / m 3) By using a liquid-absorbent layer that combines such liquid-absorbent materials, it is possible to form a pattern that corresponds to the degree of deformation of each liquid-absorbent material and the transferability of the covering material. The term "hardness" used here refers to the hardness (C method) value measured from the force applied when a test piece is compressed to 40% of its thickness in accordance with JIS K6400-2. Furthermore, the term "density" refers to the apparent density value calculated from the weight and dimensions of the test piece in accordance with JIS K7222.

[0030] The outer shape of each of the liquid-absorbent materials is not particularly limited, but is preferably an indefinite three-dimensional shape. The size of each of the liquid-absorbent materials is preferably 1 to 30 mm (more preferably 2 to 20 mm). In the present invention, it is preferable that a plurality of liquid-absorbent materials of different sizes are mixed. In such a case, liquid-absorbent materials of different sizes as well as hardness and / or density are randomly mixed in the liquid-absorbent layer, so that the effect of the present invention can be further enhanced. The "size" referred to here is the longest axis of the outer shape, and is measured, for example, by sieving through a sieve having a square of a specified dimension on one side.

[0031] The liquid-absorbent layer of the present invention is preferably one in which the above-mentioned liquid-absorbent material is formed (fixed) in a block shape. Specifically, the liquid-absorbent layer of the present invention may have at least one type of liquid-absorbent material fixed in the thickness direction of the liquid-absorbent layer, but a form in which two or more types are fixed so as to be stacked is more preferable. Furthermore, as shown in Fig. 2, a form in which a plurality of liquid-absorbent materials are fixed so as to be stacked so as to be randomly mixed in the thickness direction is even more preferable. By having such a liquid-absorbent layer, the effects of the present invention can be enhanced.

[0032] The general shape of the block-shaped liquid-absorbent layer is not particularly limited, and examples of the block-shaped shapes include rectangular parallelepiped, cubic, triangular prism, square prism, polygonal prism, cylinder, semi-cylinder, and semi-sphere. In this case, the general shape of the application surface of the liquid-absorbent layer is, for example, triangular, quadrilateral (rectangular or square), polygonal, circular, semicircular, etc. The area of ​​the application surface may be appropriately set as desired, but is preferably 3 to 500 cm. 2 (More preferably, 5 to 400 cm 2, 10~300cm 2 The height (thickness of the liquid-absorbent layer) varies depending on the size of each liquid-absorbent material, but is preferably 50 mm or less (more preferably 1 to 30 mm, and even more preferably 2 to 15 mm).

[0033] In particular, the liquid-absorbent layer of the present invention is characterized in that the edge portion of the outer periphery of the application surface has a shape that has been processed to remove it. The "shape of the edge portion of the outer periphery of the application surface that has been processed to remove it" in the present invention will be explained. Fig. 4 shows applicators that have been used conventionally (for example, JP Patent Publication No. 2003-211062, Utility Model Registration No. 3217177, etc.). These applicators have an edge portion (corner portion) [Fig. 4: Ae (enlarged partial cross-sectional view in the Y direction of part Ae)] on the outer periphery of the application surface [Fig. 4: As]. In contrast, Fig. 5 shows an example of an enlarged view of the edge portion of the applicator of the present invention (enlarged partial cross-sectional view in the Y direction of part Ae in Fig. 3). As shown in Fig. 5, the applicator of the present invention is not particularly limited as long as it has a shape in which the edge portion of Fig. 5 has been processed to remove it, and examples of such shapes include, for example, -Shape with chamfered edges [Fig. 5(i)] - A shape with rounded edges (R chamfering) [Fig. 5(ii)], - A shape with unevenness on the edge (ridge line) [Fig. 5 (iii)] - A shape that has been processed to have rounded edges and uneven shapes [Figure 5 (iv)], In the present invention, the shape may be one in which at least one of the above processes has been applied, but may be a combination of these. In the present invention, the shape is preferably one in which the edge portion is processed to have an uneven shape [Fig. 5 (iii) and (iv)]. In the present invention, instead of a linear pattern, a natural pattern (eg, having intricate patterns, light and shade patterns, etc.) in which the color boundaries are non-linear can be easily and efficiently imparted.

[0034] Furthermore, the shape of the surface of the application surface is not particularly limited, and may be smooth or uneven, but in the present invention, it is preferable that the surface has an uneven shape [Fig. 3, Fig. 5 (iii), (iv), etc.]. This allows a more natural pattern to be imparted, and the effects of the present invention can be enhanced. The size of the uneven shape of the edge part of the outer periphery of the application surface and the surface of the application surface is not particularly limited, but the height difference between the concave and convex parts is preferably 0.3 to 15 mm (more preferably 0.5 to 10 mm, and even more preferably 0.8 to 5 mm). When such a range is satisfied, the effects of the present invention can be enhanced.

[0035] The method for forming the liquid-absorbent layer is not particularly limited, but may be, for example, (1) A method of molding by filling a mold having a desired shape with at least two or more types of liquid-absorbing materials, (2) A method in which at least two or more types of liquid-absorbing materials are formed into a block having a desired general shape, and then the edge portion of the outer periphery of the application surface is removed; After the above (1), the edge portion of the outer periphery of the application surface may be further removed.

[0036] In the above (1) and (2), when the liquid-absorbent material is molded, it is preferable to use compression molding, which can enhance the effects of the present invention. In the above (1), as the mold to which the desired shape is transferred, it is preferable to use a mold to which the shape of the edge portion of the outer periphery of the application surface (if necessary, the surface shape of the application surface) has been transferred in advance. In the above (2), when removing the edge portion of the outer periphery of the application surface, a uniform process such as chamfering or R-chamfering can be performed, an uneven shape can be created by a removal process such as cutting, or a random removal process such as tearing or scraping can be performed to create an uneven shape. In the present invention, it is particularly preferable to create an uneven shape by random removal of the edge portion of the outer periphery of the application surface. This allows a more natural pattern to be efficiently imparted.

[0037] As shown in Fig. 6, the applicator of the present invention preferably has a support part [Fig. 6: B] on the surface opposite to the application surface of the liquid-absorbent layer. The support part may be any part capable of supporting the liquid-absorbent layer, and may have sufficient rigidity to allow the application surface of the applicator to apply a uniform load when it comes into contact with the surface to be coated. The material for the support part may be, for example, metal, synthetic resin (plastic), wood, ceramic, etc. The thickness of the support part is not particularly limited, but is preferably 0.1 mm to 10 cm (more preferably 0.5 mm to 5 cm). In this case, it is possible to suppress the deviation of the pattern due to uneven application pressure, and efficiently form a pattern with excellent aesthetics.

[0038] A handle portion (FIG. 6: C) can be connected to the support portion. The shape and material of the handle portion are not particularly limited as long as the above-mentioned effects can be obtained.

[0039] <How to form decorative coating surface> The method for forming the decorative coating surface shown in FIG. 1 will be used as an example for explanation. FIG. 1 shows a decorative coating surface formed by applying coating material (p) and coating material (q) in that order to the surface to be coated. (Step P) A step of applying a coating material (p) to the surface to be coated to form a colored coating (P); (Step Q) After the colored coating becomes non-flowable, a coating material (q) is applied using an applicator to form a patterned coating (Q). The present invention is characterized by comprising:

[0040] In the above (step P), when the coating material (p) is applied to the surface to be coated, for example, a spray, a roller, a trowel, a spatula, etc. can be used. The coating material (p) is preferably applied in an amount of 0.1 kg / m 2 More preferably, it is 0.15 kg / m or more. 2 More preferably, 0.2 to 5 kg / m 2When the coating amount of the coating material (p) satisfies the above range, a coating film that covers the entire surface of the substrate and has a continuous texture (three-dimensional effect, texture, touch, etc.) can be formed. In the present invention, the coating amount refers to the weight of the coating material applied to the substrate.

[0041] In addition, in the present invention, a concave-convex pattern can also be formed on the coating of the coating material (p) before the coating formed by the coating material (p) becomes non-flowable. Such a concave-convex pattern can be formed when or after the coating material (p) is applied. In the latter case, it is desirable to form the concave-convex pattern while the colored coating is in a flowable state after the coating material (p) is applied (preferably immediately after the coating material (p) is applied). The concave-convex pattern can be formed by appropriately selecting, for example, a coating tool, a coating method, a coating surface treatment tool, a coating surface treatment method, etc.

[0042] Examples of methods for imparting an uneven pattern when applying the coating material (p) include a method of spraying the coating material (p) in the form of beads, and a method of applying the coating material using a distribution roller, a fibrous roller (wool roller), a porous roller, etc.

[0043] The uneven pattern can be imparted after application of the coating material (p) by treating the coating surface with one or more tools selected from a design roller, a trowel, a brush, a comb, a spatula, etc. Such treatment is carried out, for example, by partially pressing, lifting, or removing the coating surface of the coating material (p) before it becomes non-flowable, depending on the desired uneven pattern.

[0044] Examples of the types of uneven patterns formed by such a method include stucco, sprayed tile, citron peel, uneven, moon surface, comb, wave, stripe, wormhole, sandstone, broken stone, lithic, bumpy, fan, streak, urushi, clay wall, wood grain, canyon, brick, swirl, ripple, geometric, etc. The height difference of the uneven pattern is preferably 0.1 to 8 mm, more preferably 0.2 to 5 mm.

[0045] In the above (step Q), the timing of applying the coating material (q) is not particularly limited as long as it is after the colored coating (P) becomes non-flowing. In the present invention, the "non-flowing state" refers to a state in which the colored coating (P) formed by applying the coating material (p) has lost its fluidity, specifically, a state in which the coating material (q) is dried and cured to such an extent that it does not bleed even when 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 coating material (q) after the colored coating (P) becomes touch-dry (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).

[0046] Unlike the present invention, if the coating material (q) is applied while the colored coating (P) is in a fluid state, the coating material (p) and the coating material (q) may gradually mix in the application tool during the painting process, which may cause the finish of the coating to become unstable. The coating materials may also mix on the surface to be coated, which may reduce contrast and prevent the formation of a pattern with natural coloring. Furthermore, the texture may be impaired. In contrast, in the present invention, the coating material (q) is applied after the colored coating has become non-fluid, which makes it difficult for the coating materials to mix, provides a stable finish, and allows the production of a decorative coating with excellent texture and natural coloring and high aesthetic appeal.

[0047] In the above (step Q), it is desirable to apply the coating material (q) discontinuously. In this case, in the above (step Q), the coating material (q) may be applied to the colored coating (P) in a partial manner according to the desired pattern using the applicator. Examples of the application method include tapping and pressing. In the present invention, for example, by partially (discontinuously) tapping the coating material (q), it is possible to form a decorative coating having excellent aesthetics and a natural coloring in which different colors are mixed while making use of the texture of the colored coating (P).

[0048] The amount of coating material (q) applied may be appropriately determined depending on the desired finish (pattern, etc.), but it is preferable that the amount of coating material (q) applied is less than that of coating material (p), and is preferably 0.5 kg / m 2 Less than or equal to 0.005 to 0.3 kg / m 2 , and more preferably 0.01 to 0.2 kg / m 2 When the coating material (q) is applied in an amount that satisfies the above range, a discontinuous coating is easily formed, and a decorative coating surface having a mixture of different colored regions can be stably formed.

[0049] In the present invention, when the coating material (q) is applied discontinuously, the application tool described above is used to impart contrast while making the boundaries between colored regions nonlinear (intricate), and a decorative coating with natural coloring and high aesthetics can be formed. When the coating material (q) is applied discontinuously using a fibrous material such as a wool roller, it is difficult to obtain a nonlinear (intricate) state at the boundaries between colored regions as when the application tool of the present invention is used, and aesthetics are likely to be insufficient.

[0050] <Application example 1 of decorative coating surface formation method> In the present invention, as the colored coating (P) in the above (step P), a decorative coating (P') having at least two or more types of colored regions may be formed. Examples of methods for forming such a decorative coating surface include: (Step P1) A step of applying a coating material (p1) to a surface to be coated; (Step P2) After the coating material (p1) becomes non-flowable, a coating material (p2) is discontinuously applied to form a decorative coating (P'); (Step Q) Next, a step of applying a coating material (q) to the surface having the decorative coating (P') using the application tool to form a pattern coating (Q); It is preferred that the compound contains

[0051] In this case, the coating material (p1) and the coating material (p2) can be of different colors. This can further improve the design and aesthetics. In addition, in the above (step P1), the same coating tool as the coating material (p) can be used as the coating tool for applying the coating material (p1). It is desirable to apply the coating material (p1) so as to cover the entire surface to be coated. In addition, in the above (step P2), when the coating material (p2) is applied discontinuously, a known pattern roller (for example, JP 2019-025473 A, etc.) or a coating tool such as a sponge material can be used.

[0052] In the above (step Q), the coating material (q) can be of a different color from at least one of the coating materials (p1) and (p2). For example, a coating material (q) having a different color from both the coating material (p1) and the coating material (p2), or a coating material (q) having the same color (preferably ΔE is less than 3) as at least one of the coating materials (p1) and (p2) can be used. In the former case, a different color pattern can be imparted to the decorative coating (P'), thereby improving the design. On the other hand, in the latter case, the pattern balance of the decorative coating (P') can be adjusted, thereby improving the aesthetics. In the latter case, the coating material (q) can be of the same type or the same coating material as at least one of the coating materials (p1) and (p2).

[0053] <Application example 2 of decorative coating surface formation method> Furthermore, in the present invention, a decorative coating (Q') having at least two or more kinds of colored regions mixed therein can be formed as a pattern coating (Q) on the surface of the colored coating (P) or the decorative coating (P'). Examples of methods for forming such a pattern coating include: After the above (step P), or after the above (step P1) and (step P2), (Step Q1) a step of applying a coating material (q1) to a surface having the colored coating (P) or the decorative coating (P') using the applicator; (Step Q2) A step of discontinuously applying a coating material (q2) after the coating material (q1) has become non-flowable to form a decorative coating (Q'); It is preferable to carry out the following.

[0054] In such a process, it is preferable that the coating material (q1) and the coating material (q2) have different colors. In this case, the color tones of the coating material (q1) and the coating material (q2) can be set arbitrarily as long as they are different colors.

[0055] In the present invention, the decorative coating surface may be divided to form a joint pattern. When forming the joint pattern, for example, a method of adhering a joint material to the surface to be coated, applying the coating material, and then removing the joint material can be adopted.

[0056] In the coating film forming method of the present invention, a clear layer can be provided by applying a clear coating material to the outermost surface, for example, for the purpose of surface protection, improving weather resistance, stain resistance, etc., so long as the effects of the present invention are not impaired. Such a clear layer may be either colorless and transparent or colored and transparent, and may be either glossy or matte (including 70% gloss, 50% gloss, 30% gloss, etc.). EXAMPLES

[0057] The following examples will clarify the features of the present invention.

[0058] The following coating materials were prepared:

[0059] ·Covering material 1 A light yellow coating material (L) consisting mainly of 200 parts by weight of acrylic resin emulsion (solid content 50% by weight), 25 parts by weight of color pigment (titanium oxide, carbon black, yellow iron oxide, red iron oxide), and 600 parts by weight of filler (calcium carbonate with an average particle size of 10 μm, diatomaceous earth with an average particle size of 40 μm). * Value: 84.8, a * Value: 1.3, b * Value: 22.5, Heating residue: 76% (by weight)

[0060] ·Covering material 2 A light brown coating material (L) consisting mainly of 200 parts by weight of acrylic resin emulsion (solid content 50% by weight), 50 parts by weight of color pigments (titanium oxide, carbon black, yellow iron oxide, red iron oxide), and 600 parts by weight of fillers (calcium carbonate with an average particle size of 10 μm, diatomaceous earth with an average particle size of 40 μm). * Value: 75.4, a * Value: 12.7, b * value: 42.0, heating residue: 77% by weight, △E with coating material 1: 24.5)

[0061] Example 1 In the first step, 0.8 kg / m of coating material 1 was applied to a slate board that had been given a primer coat (same color as coating material 1). 2 The entire surface was painted with a wool roller to form a colored film. The colored film was then dried for 2 hours until it became non-fluid (dry to the touch or better). Next, in the second step, the coating material 2 is applied in an amount of 0.06 kg / m 2 The coating was discontinuously applied with a tapping tool (see Fig. 6) (thickness of the liquid-absorbent layer: 10 mm, sponge material a1: hardness 45-60 N, density 50-100 kg / m 3 , sponge material A2: hardness 75~110N, density 15~30kg / m 3 , Sponge material A3: Hardness 110~140N, Density 15~50kg / m 3 , sponge material A4: hardness 110~300N, density 30~85kg / m 3 , sponge material A5: hardness 1000~1500N, density 10~20kg / m 3 , edge removal processing: Figure 5 (iv)) was used] and it was dried for 24 hours. All painting and drying was done under standard conditions (temperature 23°C, relative humidity 50%). By using the above method, a decorative coating surface with a texture similar to that of a clay wall was obtained, with a well-balanced mixture of pale yellow and light brown areas with natural shades.

[0062] Example 2 In the first step, 0.8 kg / m of coating material 1 was applied to a slate board that had been given a primer coat (same color as coating material 1). 2The entire surface was painted with a wool roller to form a colored film. The colored film was then dried for 2 hours until it became non-fluid (dry to the touch or better). Next, in the second step, the coating material 2 is applied at a coating amount of 40 g / m 2 The coating was discontinuously applied with a roller (using a roller with a pattern having projections and recesses as described in FIG. 3 of JP 2019-025473 A) and then dried for 2 hours until the coating was dry to the touch or better. Next, in the third step, the coating material 1 is applied at a coating amount of 0.06 kg / m 2 [the applicator shown in Fig. 6 (thickness of the liquid-absorbent layer: 10 mm, the applicator having the same five types of sponge material as in the second step of Example 1 was used)] and dried for 24 hours. All painting and drying was carried out under standard conditions (air temperature 23°C, relative humidity 50%). As a result of the above method, a decorative coating surface with a texture similar to that of an earthen wall was obtained, with a well-balanced mixture of pale yellow areas and pale brown areas with natural shades.

Claims

1. A coating forming method for forming a decorative coating surface having at least two or more types of colored regions, comprising the steps of: A step of applying a coating material (p) to a surface to be coated to form a colored coating (P); The method includes a step of applying a coating material (q) using an applicator to form a pattern coating (Q) after the color coating (P) has become non-flowable, The coating material (p) and the coating material (q) are different in color and each has a heating residue of 25% by weight or more, The above-mentioned applicator has a liquid-absorbent layer in which at least two or more types of liquid-absorbent materials differing in hardness and / or density are mixed, and the liquid-absorbent layer has an uneven shape at the edge portion of the outer periphery of the application surface due to random removal processing.

2. 2. The method for forming a coating film according to claim 1, wherein the liquid-absorbent layer has an uneven shape at the edge portion of the outer periphery of the application surface due to random removal processing such as picking or scraping.

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