Coating method and coating material set

Abstract

To provide a method for easily forming a highly aesthetic coating surface having natural texture in which different color tones are mixed.SOLUTION: In a coating formation method for forming a coating surface with a mixture of different color tones by using coating materials of two different kinds of color, wherein each of the coating materials contains 20-500 pts by weight of extender pigment and 3-30 pts by weight of binder based on 100 pts by weight of aggregate, wherein at least one kind of the coating materials contains 1-100 pts by weight of coloring pigment, the method performs, on the coating surface, (1) a step of applying the coating materials of the at least two kinds to form a coating surface and (2) a step of drying the coating surface.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for forming a coating surface that can be applied to the surface decoration of interior and exterior walls of buildings, civil engineering structures, etc. [Background technology]

[0002] Conventionally, coatings having various patterns have been formed on the wall surfaces of buildings, civil engineering structures, etc. One example of such a coating is one in which a pattern having a mixture of different color tones is formed using a plurality of coating materials.

[0003] Patent Document 1 discloses a method of forming a patterned coating by sequentially applying two or more colored emulsion paints with different color tones and then pressing the coating while it is in a fluid state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-263565 Summary of the Invention [Problem to be solved by the invention]

[0005] However, Patent Document 1 uses a colored emulsion paint whose main components are a resin emulsion and a colored pigment. Therefore, the color of the formed coating is based on the color development of a paint, and there is room for improvement in terms of texture. Furthermore, with the method of Patent Document 1, when two or more colors of colored emulsion paints are in a fluid state, they tend to mix with each other, which may result in the formed coating becoming monochromatic.

[0006] The present invention has been made in consideration of such problems, and aims to provide a method by which a highly aesthetic coating surface having a natural texture with a mixture of different color tones can be easily formed. [Means for solving the problem]

[0007] As a result of extensive research into solving the above problems, the present inventors came up with the idea of ​​using at least two specific coating materials, and thus completed the present invention.

[0008] That is, the present invention has the following features. 1. A coating forming method for forming a coating surface with a mixture of different color tones using at least two different color coating materials, The above coating materials are each composed of 100 parts by weight of aggregate, 100 parts by weight of extender pigment, 70 and 3 to 30 parts by weight of a binder; At least one of the coating materials further contains 1 to 100 parts by weight of a color pigment, For the coated surface, (1) At least two of the above coating materials , spread it using a trowel A process of forming a coating surface; (2) A step of drying the coated surface; A coating forming method characterized by carrying out the steps of: 2. In the above step (1) Then, water and / or solvent is applied to the surface and the surface is leveled using a trowel. 1. The method for forming a coating according to 1., characterized in that a coated surface is formed. 3. A coating material set for forming a coating surface with a mixture of different colors, The coating set comprises at least two different color coatings, The at least two coating materials each contain 100 parts by weight of aggregate, 100 parts by weight of extender pigment, 70 and 3 to 30 parts by weight of a binder; At least one of the above coating materials further contains 1 to 100 parts by weight of a color pigment. A coating material set characterized by: [Effects of the Invention]

[0009] According to the present invention, it is possible to easily form a coating surface with a high aesthetic appearance and a natural texture in which different color tones are mixed. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail.

[0011] The present invention is a coating formation method for forming a coating surface having a mixture of different color tones using at least two different color coating materials.

[0012] [Coating material] In the present invention, at least two coating materials, i.e., a coating material set, are used. Each of these coating materials contains 20 to 500 parts by weight of an extender pigment and 3 to 30 parts by weight of a binder per 100 parts by weight of aggregate, and at least one of these coating materials contains a color pigment. In the present invention, by using at least two coating materials of different colors, it is possible to easily form a highly aesthetic coating surface with a natural texture that combines different color tones. Note that, in the present invention, "α to β" is synonymous with "α or more and β or less."

[0013] The reasons for this effect of the present invention include, but are not limited to, the following: when forming a painted surface by applying multiple coating materials, the coating material's properties, which are primarily composed of aggregates and extender pigments with a small amount of binder, allow for efficient painting work, and the resulting coating surface is prevented from becoming monochromatic, revealing a mixture of multiple colored regions with a natural texture, while the bleeding of the colored pigments reduces color changes near the boundaries between the coating materials, resulting in a visually blurred state. It is believed that this visual effect of the present invention results in the appearance of natural shade changes and enhances aesthetics.

[0014] The coating material of the present invention contains aggregate as a main component. Such aggregate is a component that contributes to imparting a natural texture and preventing monochromaticity. Examples of aggregate include crushed materials such as marble, granite, serpentine, granite, fluorite, kansuiite, feldspar, silica stone, and silica sand; crushed porcelain, crushed ceramics, crushed glass, glass beads, crushed resin, resin beads, and metal particles; as well as materials having colored coatings on their surfaces. These materials can be used alone or in combination of two or more.

[0015] In the present invention, a colored aggregate can be included as the aggregate. As the colored aggregate, an aggregate that can be visually recognized as having some color can be used. The color of the colored aggregate may be, for example, a naturally occurring color or an artificially imparted color. In the present invention, the use of such a colored aggregate enables a complex color development by the color pigment and the colored aggregate, thereby improving the texture, natural feel, fineness, etc., and also enhancing the effect of suppressing monochromatism, etc.

[0016] The aggregate desirably has a larger average particle size than the extender pigments and color pigments described below. The average particle size of the aggregate is preferably 0.05 to 3 mm, more preferably 0.06 to 1 mm, even more preferably 0.07 to 0.5 mm, and particularly preferably 0.075 to 0.2 mm. When the aggregate has such an average particle size, a highly aesthetic coating surface can be formed with a relatively small amount of coating, and the coating can also be made thinner and lighter. 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 weight distribution.

[0017] In the present invention, the extender pigment is a component that contributes to imparting a natural texture, imparting shade variation, preventing monochromaticity, and improving coating workability. Examples of extender pigments include heavy calcium carbonate, light calcium carbonate, kaolin, clay, china clay, diatomaceous earth, hydrous finely powdered silicic acid, talc, baryte powder, barium sulfate, precipitated barium sulfate, barium carbonate, magnesium carbonate, silica powder, and aluminum hydroxide, and one or more of these can be used. The average particle size of the extender pigment is preferably less than 50 μm, more preferably 0.5 to 45 μm, and even more preferably 1 to 40 μm. The average particle size of the extender pigment is a value measured using a laser diffraction particle size analyzer.

[0018] The blending ratio of the extender pigment is 20 to 500 parts by weight, preferably 70 to 350 parts by weight, more preferably 90 to 300 parts by weight, and even more preferably 100 to 250 parts by weight, per 100 parts by weight of aggregate. Having a blending ratio of the extender pigment equal to or greater than the lower limit is advantageous in terms of imparting a natural texture, imparting shade variation, preventing monochromaticity, improving coating workability, etc. Having a blending ratio of the extender pigment equal to or less than the upper limit is advantageous in terms of imparting a natural texture, improving coating workability, preventing coating cracking, etc.

[0019] In the present invention, at least one coating material contains a color pigment. The color pigment is a component that contributes to the color development of the coating surface. Examples of color pigments include titanium oxide, zinc oxide, carbon black, graphite, black iron oxide, iron-manganese composite oxide, iron-copper-manganese composite oxide, iron-chromium composite oxide, iron-chromium-cobalt composite oxide, copper-chromium composite oxide, copper-manganese-chromium composite oxide, copper-magnesium composite oxide, bismuth-manganese composite oxide, 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, and pearl pigments. These pigments can be used alone or in combination of two or more. The average particle size of the color pigment is preferably 2 μm or less, more preferably 0.01 to 1 μm. The average particle size of the color pigment is a value measured by a laser diffraction particle size distribution measuring device.

[0020] When the coating material contains a color pigment, the mixing ratio of the color pigment is 1 to 100 parts by weight, preferably 2 to 80 parts by weight, more preferably 3 to 60 parts by weight, and even more preferably 4 to 40 parts by weight, calculated as solid content per 100 parts by weight of aggregate. When the mixing ratio of the color pigment is at least the above-mentioned lower limit, it is preferable in terms of color development, hiding power, and imparting shade variations. When the mixing ratio of the color pigment is at most the above-mentioned upper limit, it is preferable in terms of imparting a natural texture and suppressing coating cracking. When two or more coating materials contain a color pigment, it is sufficient that at least one (preferably two or more) of the coating materials satisfies the above-mentioned color pigment mixing ratio conditions.

[0021] The binder in the coating material is a component that plays a role in fixing aggregates, extender pigments, color pigments, etc. Various resins can be used as the binder. Examples of resins include cellulose, polyvinyl alcohol, ethylene resin, vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, acrylic resin, urethane resin, acrylic silicone resin, fluororesin, etc., as well as composites thereof. These can be used alone or in combination of two or more. Examples of binder forms include water-soluble resins, water-dispersible resins (resin emulsions), solvent-soluble resins, solventless resins, non-water-dispersible resins, and powdered resins. Among these, water-soluble resins and / or water-dispersible resins are preferred, and embodiments containing water-dispersible resins are particularly suitable. The use of water-soluble resins and / or water-dispersible resins allows for the production of an aqueous coating material. Furthermore, these binders may be either crosslinkable or non-crosslinkable.

[0022] When a binder having cross-linking reactivity is used as the binder, the durability and weather resistance of the coating can be improved, defects such as cracking, peeling, and swelling can be prevented, and the initial aesthetic appearance can be maintained for a long period of time. Examples of such binders include those that undergo a cross-linking reaction between a binder containing a reactive functional group and its cross-linking agent, and those that undergo a cross-linking reaction between binders containing reactive functional groups.

[0023] Examples of such combinations of reactive functional groups include combinations of a carboxyl group and a carbodiimide group, a carboxyl group and an epoxy group, a carboxyl group and an aziridine group, a carboxyl group and an oxazoline group, a hydroxyl group and an isocyanate group, a carbonyl group and a hydrazide group, an epoxy group and a hydrazide group, an epoxy group and an amino group, an aldo group and a semicarbazide group, a keto group and a semicarbazide group, alkoxysilyl groups, and a carboxyl group and a metal compound. These can be used alone or in combination of two or more.

[0024] The mixing ratio of the binder is 3 to 30 parts by weight, preferably 4 to 25 parts by weight, more preferably 5 to 20 parts by weight, and even more preferably 6 to 19 parts by weight, based on 100 parts by weight of aggregate. Having the mixing ratio of the binder at or above the lower limit is preferable in terms of improving coating workability and preventing coating cracking. Having the mixing ratio of the binder at or below the upper limit is preferable in terms of improving coating workability and imparting a natural texture.

[0025] The coating materials may contain other components than those described above, provided that the effects of the present invention are not significantly impaired. Examples of such components include thickeners, film-forming aids, leveling agents, wetting agents, plasticizers, antifreeze agents, pH adjusters, preservatives, antifungal agents, anti-algae agents, antibacterial agents, dispersants, antifoaming agents, adsorbents, fibers, water repellents, hydrophilizing agents, crosslinking agents, coupling agents, UV absorbers, light stabilizers, antioxidants, and catalysts.

[0026] The coating material of the present invention can be produced by uniformly mixing the above-mentioned aggregate, extender pigment, color pigment, binder, and, if necessary, the above-mentioned components, etc., in a conventional manner.

[0027] The viscosity of the coating material is preferably 5 to 150 Pa·s, more preferably 15 to 100 Pa·s, and even more preferably 25 to 75 Pa·s. Having a coating material with such a viscosity ensures ease of application of the coating material while enhancing effects such as preventing the formed coating from becoming monochromatic, imparting shade variation, and improving aesthetics. The viscosity referred to here is the viscosity measured at 20 rpm (the index value at the fourth rotation) using a BH-type viscometer at a temperature of 23°C.

[0028] The coating material set of the present invention comprises at least two different colored coating materials. In the present invention, the color tones of the at least two coating materials need only be visually distinguishable, and the color difference (ΔE) between them is preferably 1 or more, more preferably 2 or more. The color tone of each coating material can be appropriately set by, for example, blending aggregates, color pigments, etc. When the coating material set comprises two coating materials, it is sufficient that the color tones of the coating materials are different from each other. When the coating material set comprises three or more coating materials, it is sufficient that at least one of the other coating materials is a different color from one reference coating material.

[0029] In the present invention, by setting the color difference between each coating material to a relatively small value (for example, a color difference of 1 to 10), it is possible to form a coating surface with a subtle change in color tone. On the other hand, by setting the color difference between each coating material to a relatively large value (for example, a color difference of more than 10), it is possible to form a coating surface in which the color shading, etc., is clearly visible.

[0030] The color difference (ΔE) in the present invention is a value measured using a colorimeter for the dried coating film of each coating material (formed on a standard white paper with a dry thickness of 1 mm), and the L * 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 is the L of the standard type of coating material * , a * , b * .L * 2, a * 2, b * 2 is the L of other coating materials * , a * , b * )

[0031] The coating material set of the present invention comprises at least two coating materials that satisfy the above-mentioned conditions. At least one of these coating materials contains a color pigment. When such a coating material set comprises two coating materials, the following embodiments are possible: One coating material contains color pigments, and the other coating material does not contain color pigments. Both coating materials contain color pigments etc.

[0032] In addition, when the coating material set is composed of three or more types of coating materials, the form thereof is as follows: One coating material contains color pigments, and the other coating material does not contain color pigments. Two or more coating materials contain color pigments, and the other coating materials do not contain color pigments. Three or more coating materials all contain color pigments etc.

[0033] In the coating material set of the present invention, it is desirable that the average particle size of the aggregate contained in each coating material is approximately the same. The absolute value of the difference between the average particle sizes of the aggregate contained in each coating material is preferably 0.1 mm or less, more preferably 0.05 mm or less.

[0034] [Film formation method] In the present invention, a coating is formed using at least two different color coating materials as described above. (1) a step of applying at least two coating materials to form a coating surface; (2) A step of drying the coated surface; Do the following.

[0035] Examples of the surface to be coated include those constituting the interior and exterior walls of buildings and civil engineering structures. Examples of the substrate constituting the surface to be coated include concrete, mortar, porcelain tile, fiber-mixed cement board, cement calcium silicate board, slag cement perlite board, cement board, ALC board, siding board, gypsum board, plywood, extrusion molding board, steel plate, plastic plate, etc. The surface of these substrates may be subjected to some kind of surface treatment (for example, treatment with putty, sealer, surfacer, filler, etc.), or may already have a coating film formed thereon, wallpaper, etc. When a primer such as a sealer, surfacer, or filler is used, the color tone of the primer can be set to an approximate color (common color) of the covering material.

[0036] In step (1), at least two types of coating materials are applied to such a surface to be coated to form a coated surface. In step (1), each coating material is applied to the surface to be coated so that the coating materials are mixed on the surface to be coated, and then the coating material is spread to form a coated surface. This makes it possible to form a coated surface with a mixture of different color tones. The amount of coating material applied (total amount of each coating material applied) is preferably 0.1 to 3 kg / m 2 , more preferably 0.2 to 2 kg / m 2 , and more preferably 0.3 to 1 kg / m 2 , and particularly preferably 0.4 to 0.9 kg / m 2 In the present invention, a coating surface with excellent aesthetics can be formed with a relatively small amount of coating, and the coating can also be made thinner and lighter.

[0037] When applying each coating material to a substrate, tools such as a sprayer, roller, trowel, or spatula can be used. The coating materials can be applied to the substrate so that the coating materials are mixed together on the same substrate before drying. For example, the coating materials can be applied in a scattered state, adjacent to each other, partially mixed, or overlapping on the substrate. The shape and amount of each coating material applied to the substrate can be determined appropriately depending on the desired finish, aesthetics, etc.

[0038] When spreading the coating material, tools such as a trowel, spatula, roller, etc. can be used. When using a trowel, spatula, etc. to spread the coating material, it is easier to obtain a flat coating surface by leveling the coating surface.

[0039] In the present invention, it is desirable to form the coating surface using a trowel in step (1). Specifically, it is desirable to use a trowel at least when spreading the coating material, and it is more desirable to use a trowel when applying the coating material to the surface to be coated and when spreading the coating material.

[0040] In step (1), water and / or solvent can be applied to the coating surface. For example, water and / or solvent can be applied to a tool such as a trowel, spatula, or roller, or by using a spray bottle or other means. This allows for sufficient color effects, such as natural shade changes, to be imparted, further enhancing aesthetics. This effect is thought to be achieved by the bleeding action of color pigments on the coating surface before drying, which makes it easier for the boundaries between coating materials of different colors to become visually blurred.

[0041] The type of water and / or solvent supplied to the coating surface may be selected appropriately depending on the coating material used. Examples of solvents include alcohol-based solvents, ether-based solvents, and ester-based solvents. When using an aqueous coating material, water or a mixture of water and solvent can be used. The amount and timing of supplying water and / or solvent to the coating surface may be determined appropriately, taking into account the drying speed and aesthetics of the coating surface. For example, water and / or solvent can be supplied to the coating surface when and / or after spreading the coating material. Specifically, water and / or solvent can be supplied to the coating surface after spreading the coating material, and then lightly pressed (leveled) with a trowel, spatula, roller, or the like. In this case, it is desirable to supply water and / or solvent to the coating surface within 30 minutes (more preferably within 15 minutes) after spreading the coating material. Any water and / or solvent remaining on the coating surface can be removed as needed.

[0042] In step (2), the coated surface obtained by the above method is dried. The drying temperature is preferably 0°C or higher and 40°C or lower (room temperature), and heating can be performed if necessary. The drying time is preferably 2 hours or longer.

[0043] The above method allows for the production of a coating surface with a natural texture and excellent aesthetics, incorporating a mixture of different colors. The color of the coating surface formed by the present invention is based on the color tones of at least two coating materials. However, partial blending of the coating materials and bleeding of color pigments can produce color effects such as gradation and shading, imparting natural variations in shade. For example, by using a white or gray coating material, a coating surface with an aesthetic appearance such as mortar or concrete can be formed. The coating surface formed by the present invention can be flat, but various textured patterns can also be imparted. The dry film thickness of such a coating surface is preferably 0.03 to 2 mm, more preferably 0.05 to 1 mm, and even more preferably 0.1 to 0.5 mm.

[0044] In the present invention, after the above steps, a polishing step and / or a clear coating step may be carried out.

[0045] The polishing treatment can be carried out for the purpose of improving the smoothness of the coating surface. The polishing treatment may be carried out by a known method using a coated abrasive or the like. The particle size of the coated abrasive can be selected appropriately depending on the desired degree of smoothness. The treatment may also be carried out using two or more types of coated abrasive. Furthermore, in the polishing treatment, the coating surface may be wetted with water or the like as necessary while polishing. Powder generated by polishing may be removed with an air blower or a rag or the like.

[0046] The clear coating process can be carried out for purposes such as surface protection, improved weather resistance, improved stain resistance, and improved finish. Examples of coating materials used in clear coating include clear coating materials using acrylic resin, urethane resin, epoxy resin, acrylic silicone resin, fluororesin, etc. as a binder. The clear coating material may be either water-based or solvent-based, 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.).

[0047] The clear coating material can be applied by various methods such as brush coating, spray coating, roller coating, etc. The amount of coating is preferably 0.01 to 0.5 kg / m. 2 , more preferably 0.03 to 0.4 kg / m 2 Within this range of application amount, it is possible to apply the coating in multiple steps. [Example]

[0048] The following examples will be given to clarify the features of the present invention, but the present invention is not limited to these examples.

[0049] The following raw materials were used to manufacture the coating material: Aggregate A: White silica sand (average particle size 150 μm) Aggregate B: Gray silica sand (average particle size 100 μm) Extender pigment A: Heavy calcium carbonate (average particle size 15 μm) Extender pigment B: Heavy calcium carbonate (average particle size 28 μm) Extender pigment C: Talc (average particle size 8 μm) Binder A: Acrylic resin emulsion (solid content 50% by weight, glass transition temperature 30°C) Binder B: Alkoxysilyl group-containing acrylic resin emulsion (solid content 50% by weight, glass transition temperature 22°C) Binder C: Carbonyl group-containing acrylic resin emulsion (solid content 50% by weight, glass transition temperature 28°C) Crosslinker A: Adipic acid dihydrazide Color pigment A: Black pigment dispersion (20% by weight dispersion of carbon black (average particle size 0.05 μm)) Color pigment B: Yellow pigment dispersion (50% by weight dispersion of yellow iron oxide (average particle size 0.5 μm)) Color pigment C: Red pigment dispersion (50% by weight dispersion of red iron oxide (average particle size 0.2 μm)) Color pigment D: White pigment dispersion (60% by weight dispersion of titanium dioxide (average particle size 0.3 μm)) Fiber: inorganic fiber (average fiber length 0.1 mm) Dispersant: Polycarboxylic acid dispersant Coalescence agent: Ether-based coalescence agent Thickener: Hydroxyethyl cellulose 3% by weight aqueous solution Antifoaming agent: Silicone-based antifoaming agent

[0050] Example 1 -Production of coating material 1 Coating material 1 (light gray, viscosity 48 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A, 150 parts by weight of extender pigment A, 32 parts by weight of binder A (16 parts by weight in terms of solids content), 0.03 parts by weight of coloring pigment A, 0.03 parts by weight of coloring pigment B, 0.01 parts by weight of coloring pigment C, 11 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 10 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0051] -Production of coating material 2 Coating material 2 (dark gray, viscosity 47 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A, 150 parts by weight of extender pigment A, 32 parts by weight of binder A (16 parts by weight in terms of solids content), 3 parts by weight of coloring pigment A, 3 parts by weight of coloring pigment B, 1 part by weight of coloring pigment C, 6 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 10 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0052] As a result of the above, a coating material set consisting of coating material 1 and coating material 2 was obtained. The color difference between coating material 1 and coating material 2 was 17.

[0053] A slate board that had been previously coated with a gray sealer was prepared as the surface to be coated. Coating material 1 and coating material 2 were applied to the surface with a trowel so that they were mixed and adjacent to each other with some overlapping, and then immediately spread and smoothed with a trowel to form a coated surface (coating amount of coating material 1: 0.3 kg / m). 2 , coating amount of coating material 2: 0.3 kg / m 2 ) Next, water was sprayed onto the surface of the coating, the surface was smoothed again with a trowel, and then it was left to dry for 24 hours. This method resulted in the formation of a flat, mortar-like coating surface (dry film thickness 0.3 mm) with a mixture of light and dark gray areas, and visible changes in shade due to the intermediate color tones.

[0054] Example 2 -Production of coating material 3 Coating material 3 (pale orange, viscosity 47 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A, 120 parts by weight of extender pigment A, 28 parts by weight of binder A (14 parts by weight in terms of solids content), 0.2 parts by weight of coloring pigment B, 0.3 parts by weight of coloring pigment C, 11 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 10 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0055] -Production of coating material 4 Coating material 4 (deep orange, viscosity 46 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A, 120 parts by weight of extender pigment A, 28 parts by weight of binder A (14 parts by weight in terms of solids content), 0.2 parts by weight of coloring pigment A, 6 parts by weight of coloring pigment B, 10 parts by weight of coloring pigment C, 6 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 10 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0056] As a result of the above, a coating material set consisting of coating material 3 and coating material 4 was obtained. The color difference between coating material 3 and coating material 4 was 22.

[0057] A slate board that had been previously coated with an orange sealer was prepared as the surface to be coated. Coating material 3 and coating material 4 were applied to the surface with a trowel so that they were mixed and adjacent to each other with some overlapping, and then immediately spread and smoothed with a trowel to form a coated surface (coating amount of coating material 3: 0.3 kg / m). 2 , coating amount of coating material 4: 0.3 kg / m 2 ) Next, water was sprayed onto the surface of the coating, the surface was smoothed again with a trowel, and then it was left to dry for 24 hours. This method resulted in the formation of a flat orange coating surface (dry film thickness 0.3 mm) with a mixture of light orange and dark orange areas, and visible changes in shade due to the intermediate color tones between these.

[0058] Example 3 -Production of coating material 5 Coating material 5 (light gray, viscosity 52 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A with 210 parts by weight of extender pigment A, 35 parts by weight of binder A (17.5 parts by weight in terms of solids content), 0.03 parts by weight of coloring pigment A, 0.03 parts by weight of coloring pigment B, 0.01 parts by weight of coloring pigment C, 11 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 26 parts by weight of thickener, 14 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0059] ·Production of coating material 6 Coating material 6 (dark gray, viscosity 50 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A with 210 parts by weight of extender pigment A, 35 parts by weight of binder A (17.5 parts by weight in terms of solids content), 3 parts by weight of coloring pigment A, 3 parts by weight of coloring pigment B, 1 part by weight of coloring pigment C, 6 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 26 parts by weight of thickener, 14 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0060] As a result of the above, a coating material set consisting of coating material 5 and coating material 6 was obtained. The color difference between coating material 5 and coating material 6 was 16.

[0061] When coating materials 5 and 6 were used instead of coating materials 1 and 2 and a coating surface was formed in the same manner as in Example 1, a flat, mortar-like coating surface (dry film thickness 0.3 mm) was obtained, which had a mixture of light gray and dark gray areas and visible changes in shade due to the intermediate color tones between these.

[0062] Example 4 ·Production of coating material 7 Coating material 7 (light gray, viscosity 46 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A, 100 parts by weight of extender pigment A, 20 parts by weight of binder A (10 parts by weight equivalent to solids), 0.03 parts by weight of coloring pigment A, 0.03 parts by weight of coloring pigment B, 0.01 parts by weight of coloring pigment C, 11 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 6 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0063] ·Production of coating material 8 Coating material 8 (dark gray, viscosity 46 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A, 100 parts by weight of extender pigment A, 20 parts by weight of binder A (10 parts by weight equivalent to solids), 3 parts by weight of coloring pigment A, 3 parts by weight of coloring pigment B, 1 part by weight of coloring pigment C, 6 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 6 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0064] As a result of the above, a coating material set consisting of coating material 7 and coating material 8 was obtained. The color difference between coating material 7 and coating material 8 was 17.

[0065] When coating materials 7 and 8 were used instead of coating materials 1 and 2 and a coating surface was formed in the same manner as in Example 1, a flat, mortar-like coating surface (dry film thickness 0.3 mm) was obtained, which had a mixture of light gray and dark gray areas and visible changes in shade due to the intermediate color tones between these.

[0066] Example 5 ·Production of coating material 9 Coating material 9 (light gray, viscosity 54 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A with 100 parts by weight of extender pigment A, 70 parts by weight of extender pigment B, 38 parts by weight of binder B (19 parts by weight in terms of solids content), 0.03 parts by weight of coloring pigment A, 0.03 parts by weight of coloring pigment B, 0.01 parts by weight of coloring pigment C, 11 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 6 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0067] · Manufacture of coating material 10 Coating material 10 (dark gray, viscosity 52 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate A with 100 parts by weight of extender pigment A, 70 parts by weight of extender pigment B, 38 parts by weight of binder B (19 parts by weight in terms of solids content), 3 parts by weight of coloring pigment A, 3 parts by weight of coloring pigment B, 1 part by weight of coloring pigment C, 6 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 30 parts by weight of thickener, 6 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0068] As a result of the above, a coating material set consisting of coating material 9 and coating material 10 was obtained. The color difference between coating material 9 and coating material 10 was 18.

[0069] When coating materials 9 and 10 were used instead of coating materials 1 and 2 and a coating surface was formed in the same manner as in Example 1, a flat, mortar-like coating surface (dry film thickness 0.3 mm) was obtained, which had a mixture of light gray and dark gray areas and visible changes in shade due to the intermediate color tones between these.

[0070] Example 6 ·Production of coating materials 11 Coating material 11 (light gray, viscosity 36 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate B with 110 parts by weight of extender pigment B, 20 parts by weight of extender pigment C, 16 parts by weight of binder C (8 parts by weight in terms of solids content), 0.2 parts by weight of crosslinker A, 0.1 part by weight of coloring pigment B, 0.03 part by weight of coloring pigment C, 38 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 38 parts by weight of thickener, and 1 part by weight of antifoaming agent in a conventional manner.

[0071] ·Production of coating materials 12 Coating material 12 (dark gray, viscosity 35 Pa s) was produced by mixing and stirring 100 parts by weight of aggregate B with 110 parts by weight of extender pigment B, 20 parts by weight of extender pigment C, 16 parts by weight of binder C (8 parts by weight in terms of solids content), 0.2 parts by weight of crosslinker A, 2 parts by weight of coloring pigment D, 3 parts by weight of fiber, 1 part by weight of dispersant, 3 parts by weight of film-forming aid, 22 parts by weight of thickener, 8 parts by weight of water, and 1 part by weight of antifoaming agent in a conventional manner.

[0072] As a result of the above, a coating material set consisting of coating material 11 and coating material 12 was obtained. The color difference between coating material 11 and coating material 12 was 26.

[0073] When coating materials 11 and 12 were used instead of coating materials 1 and 2 and a coating surface was formed in the same manner as in Example 1, a flat, mortar-like coating surface (dry film thickness 0.3 mm) was obtained, which had a mixture of light gray and dark gray areas and visible changes in shade due to the intermediate color tones between these.

Claims

1. A coating forming method for forming a coating surface having a mixture of different color tones using at least two different color coating materials, comprising: The coating material contains 70 to 500 parts by weight of an extender pigment and 3 to 30 parts by weight of a binder, relative to 100 parts by weight of an aggregate, At least one of the coating materials further contains 1 to 100 parts by weight of a color pigment; For the coated surface, (1) spreading the at least two coating materials using a trowel to form a coating surface; (2) A step of drying the coated surface; A coating forming method characterized by carrying out the steps of:

2. The method for forming a coating according to claim 1, characterized in that in the step (1), the coating is spread using a trowel, and then water and / or a solvent is supplied to the coating surface, and the coating surface is leveled using a trowel to form a coating surface.

3. A coating material set for forming a coating surface having a mixture of different color tones, The coating set comprises at least two different color coatings, Each of the at least two coating materials contains 70 to 500 parts by weight of an extender pigment and 3 to 30 parts by weight of a binder relative to 100 parts by weight of an aggregate, At least one of the coating materials further contains 1 to 100 parts by weight of a color pigment. A coating material set characterized by: