Covering material

Abstract

To provide a colored aggregate-containing coating material capable of forming a coating film excellent in beauty.SOLUTION: The coating material of the present invention contains a resin component (A), a colored aggregate (B) having an aggregate with a Mohs hardness of greater than 5 as a base particle, and a coloring pigment (C). The colored aggregate (B) is contained in an amount of 20-2,000 pts.wt. based on 100 pts.wt. of the solid content of the resin component (A). The weight ratio of the colored aggregate (B) to the coloring pigment (C) is 100:1-100:50.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a novel coating material containing colored aggregates.

Background Art

[0002] Conventionally, walls of buildings and the like have been coated with coating materials for purposes such as surface protection and improvement of aesthetic appearance. Among such coating materials, those containing colored aggregate as a main component are known to be capable of imparting decorative properties such as a stone-like texture. For example, Japanese Patent Laid-Open No. 2004-2576 (Patent Document 1) describes a coating material formed by combining colored silica sands with color tones such as red, black, and brown. A coating material containing such colored silica sand as a main component can form a coating film excellent in durability, aesthetic appearance and the like.

[0003] By the way, sprayers, rollers, brushes, trowels and the like are generally known as coating tools for applying coating materials. Among these, sprays are advantageous in terms of work efficiency and the like, but may require large-scale equipment or cause scattering of the material. In contrast, a method using a trowel as a coating tool has attracted attention. As a trowel, for example, those provided with a handle, a trowel plate, and the like are known as disclosed in Japanese Patent Laid-Open No. 6-220988 and the like.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0005] However, when a coating material as described in the above Patent Document 1 is applied by trowel, repeated application may cause abrasion or damage to the trowel plate. In particular, as the drying of the coating material progresses, abrasion and damage to the trowel plate become more likely to occur, which may impair the aesthetic appearance of the formed coating film.

[0006] This invention has been made in view of these points, and aims to provide a colored aggregate-containing coating material that can form a coating with excellent aesthetic appeal. [Means for solving the problem]

[0007] In order to solve these problems, the inventors diligently conducted research and came up with the idea of ​​a coating material containing colored aggregate, colored pigment, etc., in a specific ratio, and thus completed the present invention.

[0008] In other words, the present invention has the following features. 1. A covering material containing colored aggregate, Resin component (A), Average particle size 0.05~3mm, Colored aggregate (B) and colored pigment (C) using aggregate with a Mohs hardness of more than 5 as the base particle, and Average particle size less than 50 μm, Contains powders and granules (D) with a Mohs hardness of 5 or less. The above resin component (A) contains 20 to 2000 parts by weight of the above colored aggregate (B) per 100 parts by weight of solid content. The weight ratio of the above-mentioned colored aggregate (B) to the above-mentioned colored pigment (C) is 100:1 to 100:50. The weight ratio of the above colored aggregate (B) to the above granular material (D) is 100: 100 The ratio is approximately 100:1900. A covering material characterized by the following features. 2. The covering material according to 1, characterized in that it is applicable to trowel application. 3. The covering material according to 2., characterized in that the trowel is made of metal. [Effects of the Invention]

[0009] The coating material of the present invention can form a coating with excellent aesthetic appeal. The coating material of the present invention can exhibit particularly advantageous effects when applied to trowel application. [Modes for carrying out the invention]

[0010] The following describes embodiments for carrying out the present invention.

[0011] The coating material of the present invention comprises a resin component (A), a colored aggregate (B) with aggregate having a Mohs hardness of more than 5 as the base particle, and a colored pigment (C).

[0012] Resin component (A) (hereinafter also referred to as "component (A)") is a component that plays a role in immobilizing powders and granules such as colored aggregates and colored pigments. Examples of types of component (A) 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., or composite systems thereof. These can be used individually or in combination of two or more types. Examples of forms of component (A) include water-soluble resins, water-dispersible resins (resin emulsions), solvent-soluble resins, solvent-free resins, non-water-dispersible resins, powder resins, etc. Among these, water-soluble resins and / or water-dispersible resins are preferred, and embodiments containing water-dispersible resins are particularly preferred. By using water-soluble resins and / or water-dispersible resins, an aqueous coating material can be obtained. Furthermore, these resin components may be either crosslinking-reactive or non-crosslinking-reactive.

[0013] The glass transition temperature of component (A) is preferably 0 to 80°C, more preferably 5 to 60°C, and even more preferably 10 to 50°C, from the viewpoint of stain resistance, crack prevention, etc. This glass transition temperature can be determined by Fox's formula.

[0014] In this invention, a colored aggregate (B) (hereinafter also referred to as "component (B)") is used as the colored aggregate, with aggregate having a Mohs hardness of more than 5 as the base particle. Component (B) contributes to the color, pattern, texture, etc., of the coating.

[0015] Component (B) is obtained by treating base particles with a colorant, and an aggregate having a Mohs hardness of more than 5 is used as the base particles. Examples of aggregates with a Mohs hardness of more than 5 (preferably 6 to 9) include pulverized products of feldspar (Mohs hardness 6.0), alumina (Mohs hardness 9.0), silica stone (Mohs hardness 7.0), silica sand (Mohs hardness 7.0), etc., pulverized ceramics, pulverized ceramic products, and the like. The Mohs hardness in the present invention is a value measured using a Mohs hardness tester (provided that diamond is taken as 10).

[0016] The treatment of base particles with a colorant can be performed by a known method. Examples of the colorant include dyes, metal ions, pigments, glazes, and the like. Examples of the treatment method include a method of impregnating the base particles with the colorant, a method of coating the surface of the base particles with the colorant, and the like. In such a treatment, a binder or the like can be used as needed to immobilize the colorant on the base particles.

[0017] The average particle diameter of component (B) is preferably 0.05 to 3 mm, more preferably 0.06 to 1 mm, still more preferably 0.07 to 0.5 mm, and particularly preferably 0.075 to 0.2 mm. When component (B) has such an average particle diameter, it is suitable in terms of troweling workability, etc., and can form a coating film with high aesthetics with a relatively small application amount, which is also advantageous in terms of thinning and weight reduction of the coating film. The average particle diameter of component (B) is a value obtained by sieving using a metal mesh sieve specified in JIS Z8801-1:2000 and calculating the average value of the weight distribution.

[0018] The mixing ratio of component (B) is 20 to 2000 parts by weight, preferably 50 to 1600 parts by weight, more preferably 100 to 1400 parts by weight, and still more preferably 200 to 1200 parts by weight, relative to 100 parts by weight of the solid content of component (A). When the content ratio of component (B) is not less than the above lower limit, it is suitable in terms of imparting color, pattern, texture, and the like. When the content ratio of component (B) is not more than the above upper limit, it is suitable in terms of suppressing coating film cracking and the like.

[0019] In addition to the above components, the coating material of the present invention further comprises a color pigment (C) (hereinafter also referred to as "component (C)"). Component (C) is an essential component for forming a coating film with excellent aesthetics. For example, when troweling a coating material containing the above-mentioned colored aggregate (B), unnecessary streaks may occur due to fine detached components generated by wear or damage to the trowel plate, which may impair aesthetics. In the present invention, by including component (C) in a specific ratio, such problems can be suppressed while making full use of the color, pattern, texture and other properties of component (B).

[0020] Examples of the color pigment include titanium oxide, zinc oxide, carbon black, graphite, black iron oxide, iron-manganese composite oxides, iron-copper-manganese composite oxides, iron-chromium composite oxides, iron-chromium-cobalt composite oxides, copper-chromium composite oxides, copper-manganese-chromium composite oxides, copper-magnesium composite oxides, bismuth-manganese composite oxides, red iron oxide, molybdate orange, permanent red, permanent carmine, anthraquinone red, perylene red, quinacridone red, yellow iron oxide, titanium yellow, first yellow, benzimidazolone yellow, chrome green, cobalt green, phthalocyanine green, ultramarine blue, Prussian blue, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet, aluminum pigments, pearlescent pigments, etc. These can be used singly or in combination of two or more. The average particle diameter of the color pigment is preferably 2 μm or less, more preferably 0.01 to 1 μm. The average particle diameter of the color pigment is a value measured by a laser diffraction particle size distribution analyzer.

[0021] The weight ratio {(B):(C)} of colored aggregate (B) to colored pigment (C) is 100:1 to 100:50, preferably 100:2 to 100:40, more preferably 100:2.5 to 100:30, and even more preferably 100:3 to 100:25. In this invention, by including component (C) in such a ratio, it is possible to suppress defects caused by wear and damage to the trowel board while utilizing the color, pattern, texture, etc. of component (B), and to obtain a coating with excellent aesthetics. In this invention, the aesthetics can also be enhanced by the combined color development of component (B) and component (C). If there is too little component (C), defects caused by wear and damage to the trowel board cannot be suppressed, and the aesthetics may be impaired. If there is too much component (C), the properties of component (B) are diminished, and the coating tends to have a monotonous paint-like appearance.

[0022] In this invention, in addition to the above components, a powder or granular material (D) with a Mohs hardness of 5 or less (hereinafter also referred to as "component (D)") may be included. In this invention, by using a powder or granular material (D) with a Mohs hardness of 5 or less (preferably 1 to 4), wear and damage to the trowel board can be mitigated, and the aesthetic appearance of the coating can be improved.

[0023] (D) Examples of components include inorganic particles such as calcium carbonate (Mohs hardness 3.0), granite (Mohs hardness 3.0), granite (Mohs hardness 3.0), marble (Mohs hardness 3.0), mica (Mohs hardness 2.8), clay (Mohs hardness 1.5), talc (Mohs hardness 1.0), hydrated aluminum silicate (Mohs hardness 1.0), hydrated magnesium silicate (Mohs hardness 1.0), calcined aluminum silicate (Mohs hardness 2.5), and diatomaceous earth (Mohs hardness 1.0), or organic particles such as resin beads, crushed resin, rubbers, plastics, plant fibers, and plant fragments. These can be used individually or in combination of two or more.

[0024] Among these, suitable components (D) include, for example, one or more selected from calcium carbonate, granite, mica, clay, talc, hydrated aluminum silicate, hydrated magnesium silicate, calcined aluminum silicate, diatomaceous earth, etc. When such components (D) are used, it is possible to mitigate wear and damage to the trowel board while making use of the color development properties of components (B) and (C), and it is even more preferable in terms of improving the aesthetic appearance of the coating.

[0025] The average particle size of component (D) is preferably less than 50 μm, more preferably 0.5 to 45 μm, and even more preferably 1 to 40 μm. By using such component (D), it is possible to reduce the gloss of the coating while utilizing the texture and other properties based on component (B), and to improve the workability of trowel application. The average particle size of component (D) is a value measured by a laser diffraction particle size distribution analyzer.

[0026] The mixing ratio of component (D) is preferably 200 to 2000 parts by weight, more preferably 300 to 1800 parts by weight, even more preferably 400 to 1600 parts by weight, and particularly preferably 500 to 1500 parts by weight, per 100 parts by weight of the solid content of component (A). When the composition ratio of component (D) is above the lower limit, it is advantageous in terms of reducing gloss, improving texture, and improving paintability, and is also advantageous when forming a relatively thin and flat coating. When the composition ratio of (D) is below the upper limit, it is advantageous in terms of suppressing coating cracking. From this viewpoint, the weight ratio of component (B) to component (D) {(B):(D)} is preferably 100:25 to 100:1900, more preferably 100:70 to 100:900, and even more preferably 100:100 to 100:600.

[0027] The coating material of the present invention may also contain components other than those listed above, as long as they do not significantly impair the effects of the present invention. Examples of such components include thickeners, film-forming aids, leveling agents, wetting agents, plasticizers, antifreeze agents, pH adjusters, preservatives, antifungal agents, antialgal agents, antibacterial agents, dispersants, defoaming agents, adsorbents, fibers, water repellents, hydrophilic agents, crosslinking agents, coupling agents, ultraviolet absorbers, light stabilizers, antioxidants, catalysts, solvents, and water. The coating material of the present invention can be manufactured by uniformly mixing the above-mentioned resin component (A), colored aggregate (B), colored pigment (C), and, if necessary, each of the above components, by conventional methods.

[0028] The coating material of the present invention can be applied to, for example, the walls of buildings, civil engineering structures, etc. Examples of substrates that constitute such a surface to be coated include concrete, mortar, porcelain tiles, fiber-reinforced cement boards, cement calcium silicate boards, slag cement perlite boards, cement boards, ALC boards, siding boards, gypsum boards, plywood, extruded boards, steel plates, plastic boards, etc. The surface of these substrates may have undergone some kind of surface treatment (for example, treatment with putty, sealer, surfacer, filler, etc.), or it may already have a coating film formed on it, or wallpaper or the like may be attached to it. When using primers such as sealers, surfacers, or fillers, their color tone can be set to an approximate color (matching color) of the coating material.

[0029] In applying the coating material of the present invention, for example, sprays, rollers, brushes, trowels, etc., can be used, but in the present invention, it is desirable to use at least a trowel. Trowels are classified according to the material of the trowel plate. In the present invention, for example, metal trowels, wooden trowels, plastic trowels, etc., can be used. In the present invention, advantageous effects can be obtained when a metal trowel is used in particular. The metal trowel is not particularly limited, and any known shape can be used. The thickness of the trowel plate is preferably 0.1 to 1 mm. Examples of metal trowel plates include iron plates, steel plates, aluminum plates, stainless steel plates, etc.

[0030] Specifically, the coating of the present invention can be applied by first applying the coating to the surface to be coated, and then spreading the applied coating. In this invention, it is preferable to use a trowel at least when spreading the coating, and it is even more preferable to use a trowel when applying the coating to the surface to be coated and when spreading the coating. Using a trowel when spreading the coating makes it easier to obtain a flat film by leveling the coated surface. When spreading the coating, it is also possible to level the coated surface while supplying water or solvent to the coated surface with a spray bottle or the like.

[0031] In this invention, a coating can be formed using one or more coating materials. When two or more coating materials of different colors are used, a colorful coating with multiple colors can be formed.

[0032] The amount of coating material applied (in terms of solid content) is preferably 80 to 3000 g / m². 2 Comfortable 150-1000g / m 2 More preferably 200-750 g / m² 2 Particularly preferred is 300-700 g / m² 2 In this invention, a highly aesthetic coating can be formed with a relatively small amount of coating, and the coating can be made thinner and lighter.

[0033] Drying after coating can be carried out at room temperature (preferably 0-50°C, more preferably 5-45°C), and heating may be used if necessary. After coating, sanding, clear coating, etc., may be performed as needed. [Examples]

[0034] Examples are shown below to further clarify the features of the present invention, but the present invention is not limited to these examples.

[0035] Each coating material was manufactured by uniformly mixing the components using conventional methods at the mixing ratios shown in Table 1. The following raw materials were used in the manufacture of the coating materials. • Resin 1: Acrylic resin emulsion (50% solids by weight, glass transition temperature 30°C, average particle size 120 nm) • Colored aggregate 1: White silica sand (silica sand with a Mohs hardness of 7.0, surface-coated with a white coloring agent, average particle size 150 μm) • Coloring pigment 1: Black pigment dispersion (20% by weight dispersion of carbon black (average particle size 0.05 μm)) • Coloring pigment 2: Yellow pigment dispersion (50% by weight dispersion of yellow iron oxide (average particle size 0.5 μm)) • Coloring pigment 3: Red pigment dispersion (50% by weight dispersion of red iron oxide (average particle size 0.2 μm)) • Coloring pigment 4: White pigment dispersion (60% by weight dispersion of titanium dioxide (average particle size 0.3 μm)) • Powder / Granule 1: Heavy calcium carbonate (Mohs hardness 3.0, average particle size 15 μm) • Fiber: Inorganic fiber (average fiber length 0.1 mm) • Dispersant: Polycarboxylic acid-based dispersant • Film-forming aids: Ether-based film-forming aids • Thickener: 3% by weight aqueous solution of hydroxyethylcellulose • Antifoaming agent: Silicone-based antifoaming agent

[0036] [Table 1]

[0037] (Example 1) A slate board, pre-coated with a white sealer, was prepared as the surface to be coated. Coating material 1 was applied to this surface using a metal trowel, and then immediately spread and smoothed with the metal trowel to form the coated surface. The amount of coating material 1 applied (in terms of solid content) was 450 g / m². 2 After drying for 24 hours, the appearance of the coating was examined, and a white coating with a low gloss and flat, natural texture was obtained.

[0038] (Example 2) Painting was performed in the same manner as in Example 1, except that coating material 2 was used instead of coating material 1. Upon checking the appearance of the coating, a white coating with a low gloss and flat, natural texture was obtained.

[0039] (Example 3) Painting was performed in the same manner as in Example 1, except that coating material 3 was used instead of coating material 1. Upon checking the appearance of the coating, a white coating with a low gloss and flat, natural texture was obtained.

[0040] (Example 4) Painting was performed in the same manner as in Example 1, except that coating material 4 was used instead of coating material 1. Upon checking the appearance of the coating, a gray coating with a low gloss and flat, natural texture was obtained.

[0041] (Comparative Example 1) When painting was performed in the same manner as in Example 1, except that coating material 5 was used instead of coating material 1, dark streaks were observed scattered within the white coating.

[0042] (Comparative Example 2) When painting was performed in the same manner as in Example 1, except that coating material 6 was used instead of coating material 1, the texture as in Example 1 was not obtained, and a monotonous white coating was formed.

Claims

1. A covering material containing colored aggregate, It comprises a resin component (A), a colored aggregate (B) with an average particle size of 0.05 to 3 mm and a Mohs hardness greater than 5 as the base particle, a colored pigment (C), and a powder or granular material (D) with an average particle size of less than 50 μm and a Mohs hardness of 5 or less. The above resin component (A) contains 20 to 2000 parts by weight of the above colored aggregate (B) per 100 parts by weight of solid content. The weight ratio of the above-mentioned colored aggregate (B) to the above-mentioned colored pigment (C) is 100:1 to 100:

50. The weight ratio of the above-mentioned colored aggregate (B) to the above-mentioned powdered material (D) is 100:100 to 100:1900. A covering material characterized by the following features.

2. The covering material according to claim 1, characterized in that it is applicable to trowel application.

3. The covering material according to claim 2, characterized in that the trowel is a metal trowel.

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