Coating method

Abstract

To provide a coating method that can stably and easily form an excellent design such as a patchy pattern on an object to be coated, by soaking a coating tool with appropriate quantities of coating materials.SOLUTION: In a coating method, which coats an object with coating materials, coating materials are soaked in a coating material tray formed of absorbers, then the soaked coating materials are transferred onto a coating tool and the transferred coating materials are coated to an object to be coated, so that appropriate quantities of coating materials can be applied to the coating tool, which can easily form an excellent design such as a patchy pattern on the object to be coated.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present disclosure relates to a coating method capable of forming a coated surface excellent in design. [Background technology]

[0002] 2. Description of the Related Art Conventionally, painting of structures such as buildings has been carried out by spray painting using a spray gun or roller painting using a painting roller. Spray painting using a spray gun or similar device is a painting method that can apply paint in a relatively fast speed and form a uniform coating. It can also use multi-color paints, which apply multiple colors at once, to form decorative painted surfaces.

[0003] However, this is on the decline due to the many preparations required before painting, such as curing, and problems such as paint splashing onto nearby areas. On the other hand, roller painting using a paint roller is a little slower than spray painting, but it is a painting method that is often used for painting buildings and other structures because there is less splashing of paint during the painting process. However, it was difficult to achieve a colorful, multi-colored paint that had excellent design qualities.

[0004] However, among the coating methods using a coating roller, the coating formation method described in Patent Document 1 discloses that it is possible to easily form a pattern with excellent aesthetic appearance. This involves applying a first coating material, which contains a synthetic resin and a pigment and has a concealing rate of 90% or more when the coating is formed, to a substrate, forming a base layer, and then applying a second coating material, which contains a synthetic resin and a pigment, has a concealing rate of 90% or more when the coating is formed, and has a different color tone from the first coating material, using a roller brush on which at least two or more types of absorbent materials with different hardness and / or density are mixed on the outer circumferential surface of a cylinder.

[0005] Furthermore, Patent Document 2 describes a painting roller and a painting method using the same, which has high productivity and is capable of easily forming various spotted patterns. This is a painting roller having a roller body with a paint adhesion layer on its outer peripheral surface and a tubular member covering the roller body, the tubular member having a plurality of through holes in its peripheral wall, and the paint adhesion layer protruding from the through holes to form a brush portion.

[0006] This painting roller allows the formation of a mottled pattern simply by covering the roller body with a cylindrical member having multiple through holes, making it possible to produce painting with excellent design even with roller painting. Patent Document 3 describes a method for forming colorful patterns by painting on exposed concrete, etc., in which a mottled pattern is created using an uneven cubic synthetic sponge or a roller-type synthetic sponge.

[0007] This method involves applying a weather-resistant, waterproof paint with a light color that is closely matched to the color of the concrete surface as an undercoat to the entire surface of the existing concrete, and applying the paint with a viscosity that is normally used. While the undercoat is still wet, a pattern is created with a paint of the same viscosity but a darker color than the undercoat, and then, while still wet, a thin layer of the undercoat is applied over the undercoat to create a colorful pattern on exposed concrete. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2016-032807 A [Patent Document 2] JP 2017-056439 A [Patent Document 3] JP 2008-266911 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, in Patent Document 1, if too much paint gets on the roller brush, it may not be possible to obtain a natural pattern with random and subtle changes in color tone. In addition, in Patent Document 2, it is necessary to prepare a cylindrical part having a plurality of through holes and to cover the roller body with it, which is time-consuming. Also, there are cases where paint gets on the cylindrical member, making it impossible to form the desired pattern.

[0010] In Patent Document 3, it was difficult to impart an appropriate amount of paint to a cubic synthetic sponge or a roller-type synthetic sponge having uneven surfaces, and it was sometimes impossible to stably apply a mottled pattern. As described above, with the painting methods described in the patent documents, more paint than necessary ends up on the painting tools, which can make it difficult to form the desired pattern or can make painting more time-consuming.

[0011] The present disclosure provides a painting method that can stably and easily form an excellent design, such as a mottled pattern, on an object to be painted by impregnating a painting tool with an appropriate amount of paint. [Means for solving the problem]

[0012] To provide a painting method for painting an object with paint, in which paint is soaked in a paint tray formed by an absorbent, the soaked paint is transferred to a painting tool, and the transferred paint is applied to the object to be painted, thereby applying an appropriate amount of paint to the painting tool and easily forming an excellent design such as a mottled pattern on the object to be painted. The surface of the painting tool has an absorbent paint-retaining layer, which is composed of multiple types of absorbents with different absorption rates, allowing the painting tool to absorb an appropriate amount of paint, making it easy to form a relatively fine mottled pattern on the object to be painted.

[0013] By providing the paint-retaining layer with an uneven surface, it is possible to stably and easily form an excellent design such as a mottled pattern having a size approximately equal to the uneven surface, and thus to perform painting with a gradation pattern. Since the convex portions of the uneven paint retaining layer are made of an absorbent having a smaller paint absorption and retention capacity than the concave portions, a mottled pattern can be formed more stably and easily, and a gradation pattern can be painted. [Brief description of the drawings]

[0014] [Figure 1] 1 shows a urethane chip as an example of an absorbent body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] An embodiment of the present disclosure will be described. The painting method disclosed herein is a painting method for painting an object with paint, in which the paint is absorbed in a paint tray formed by an absorbent, the absorbed paint is transferred to a painting tool, and the transferred paint is applied to the object to be painted.

[0016] First, the paint used in the coating method of the present disclosure is a paint used in general coating work, and is mainly composed of a binder component such as an organic binder such as synthetic resin or an inorganic binder such as cement. There are also paints that are a mixture of an organic binder and an inorganic binder. Synthetic resins, which are organic binders, include acrylic resin, silicone resin, acrylic silicone resin, fluororesin, polyurethane resin, styrene resin, epoxy resin, melamine resin, alkyd resin, polyvinyl chloride resin, vinyl acetate resin, polyester resin, polyether resin, phenolic resin, and ketone resin.

[0017] In many cases, synthetic resin emulsions are used, in which these synthetic resins are dispersed in water. Paints using these synthetic resin emulsions are water-based paints that use water as a solvent, and are preferred in terms of ease of handling and workability. These synthetic resins may be used alone or in combination of two or more kinds. The monomers constituting these resins are generally used alone or in copolymer form.

[0018] Among the synthetic resin emulsions using these synthetic resins, acrylic synthetic resin emulsions, acrylic styrene synthetic resin emulsions, acrylic silicone synthetic resin emulsions, urethane synthetic resin emulsions, and the like, which have good water resistance, are preferably used. These synthetic resin emulsions are also suitable for use in terms of their suitability for coating materials, the physical properties of the coating film, and ease of availability, in addition to their water resistance.

[0019] Inorganic binders include Portland cement, blast furnace cement, alumina cement, jet cement, white cement, etc. Other inorganic binders include gypsum, hydrated lime, dolomite plaster, silicates, colloidal silica, and other silica-based binders. In addition to these binders, paints are made by blending pigment components such as coloring pigments and extender pigments, filler components such as bulking materials and matting agents, fibers, surfactants such as wetting agents, dispersants, and defoamers, high-boiling point solvents such as film-forming agents, antifreeze agents, and plasticizers, viscosity adjusters such as thickeners, pH adjusters, preservatives, anti-mold agents, anti-algae agents, antibacterial agents, adsorbents, UV absorbers, antioxidants, and additives such as light stabilizers.

[0020] The particle size of the filler component contained in the paint of the present disclosure is preferably 1000 μm or less. If the particle size of the filler component is larger than 1000 μm, the filler component cannot be contained in the absorbent body when the paint is placed on a paint tray formed by the absorbent body described later, and when the paint is transferred to a painting tool and painted on an object to be painted, too much paint or too much filler component may adhere, making it impossible to form the desired design. It is more preferably 500 μm or less, and even more preferably 100 μm or less. When the filler component is 100 μm or less, paint can be easily absorbed into the absorbent material and an appropriate amount of paint can be applied to the painting tool, making it possible to stably form patterns with excellent design.

[0021] The viscosity of the coating material is preferably in the range of 0.1 to 10.0 Pa·s. This viscosity is measured using a B-type viscometer under the measurement conditions of 23° C., 20 rpm, and 60 seconds. If the viscosity of the paint is lower than 0.1 Pa s, too much paint will be absorbed by the absorbent material, making it difficult to paint. In addition, when painting on a vertical surface, drips will occur easily and it may not be possible to form a decorative pattern.

[0022] If the viscosity of the paint is higher than 10.0 Pa s, it may be difficult to apply the appropriate amount of paint to the painting tool, resulting in too much paint getting on the surface or the need to apply paint to the painting tool multiple times, making it difficult to paint consistently. More preferably, the viscosity of the coating material is in the range of 0.3 to 7.0 Pa·s, and within this range, a design-oriented pattern can be stably formed.

[0023] In the coating method disclosed herein, an absorbent is used as a paint tray. This absorbent may be any material capable of containing paint, such as fiber, sponge, paper, cement products such as concrete and mortar, and wood. Among these, fiber and sponge are preferred, as the paint contained in the absorbent is released by applying pressure. This is because, in the painting method disclosed herein, it is used in place of a painting bucket used in normal painting, and if the absorbent body still contains paint, the paint cannot be transferred to the painting tool.

[0024] In addition, conventional painting buckets are made of plastic or metal, which cannot absorb paint, so too much paint gets on the painting tools, making it difficult to create aesthetically pleasing patterns such as mottled designs on the surface being painted. When used in place of a painting bucket in the painting method of the present disclosure, the absorbent is preferably a sponge. A sponge can absorb and release paint appropriately, and is elastic and does not deform significantly even when pressed against a painting tool, making painting work easier.

[0025] More preferably, it is made of the same material as the paint retaining layer of the painting tool described below, which allows paint to be absorbed evenly and makes it easy to form patterns. When used as a substitute for a painting bucket, the size of the absorbent body is preferably in the range of 5.0 to 30 cm. If it is smaller than 5.0 cm, the efficiency is poor because the amount of paint absorbed is small, and when a roller is used as a painting tool, the workability is poor because the length is smaller than the roller.

[0026] If it is longer than 30cm, it will be difficult to hold in your hand while painting, making it difficult to use. The painting tools of the present disclosure may be any tools commonly used in painting, such as rollers, brushes, trowels, and spatulas, or tools capable of applying paint to the object to be painted, such as a block or cloth.

[0027] The paint contained in the paint tray formed by the absorbent is transferred to the painting tool, and the paint is applied to the object to be painted. Since an appropriate amount of paint can be applied to the painting tool, it is easy to form a pattern with excellent design. It is also preferable to randomly tap or rub the coating tool, and by applying the coating to the object in this manner, a mottled pattern can be easily formed.

[0028] It is preferable that the surface of the painting tool has a paint retaining layer, and the paint retaining layer is composed of a plurality of absorbents having different absorption rates. The presence of the paint retaining layer allows paint contained in a paint tray formed by the absorbents to be absorbed into the painting tool when it is transferred. The material of this paint retaining layer may be any material capable of containing paint, similar to the absorbent, and may include fibers, sponges, paper, cement products such as concrete and mortar, and wood, among which it is preferable to use a combination of fibers and sponges, which allow the paint contained in the paint retaining layer to be released by applying pressure.

[0029] Also preferably used is a material called chip urethane, shown in FIG. 1, which is made by crushing urethane foam with different physical properties such as absorbency and hardness, blending it with an adhesive, and pressing it into a mold. By using multiple types of foamed polymer materials with different absorption rates, such as chip urethane, it is possible to create areas that absorb paint easily and areas that do not, resulting in a relatively fine mottled pattern when the paint is applied to the object to be painted, making it possible to express subtle shadows, etc.

[0030] The paint-retaining layer of this painting tool is preferably uneven, which allows a mottled pattern of approximately the size of the unevenness to be formed stably and easily, and enables painting of a gradation pattern. When the paint-retaining layer is made of a single material, the unevenness can be formed by cutting the material into small pieces.

[0031] When multiple materials are used in combination, a bumpy pattern can be formed by dotting one material with another material, and this is preferable because a pattern with excellent design, such as a mottled pattern, can be formed by dividing the material into convex and concave portions. Furthermore, it is preferable that the convex portions are made of an absorbent having a smaller paint absorption and retention capacity than the concave portions, so that more paint than necessary does not adhere to the convex portions, making it easy to form a design-oriented pattern such as a mottled pattern, and the paint absorbed in the concave portions is supplied to the convex portions, allowing for stable painting.

[0032] It is preferable that the absorbent material that forms the convex portions is one that is less likely to deform. If the absorbent material that forms the convex portions deforms and becomes concave, it will have the same height as the concave portions, and it may not be possible to form a mottled pattern when the material is applied to the surface to be coated. The hardness of the protrusions should preferably be such that when a weight weighing 1.0 kg and with a contact area of ​​7 x 7 cm is placed on the material of the protrusions, the material does not sink in. If the protrusions have this level of hardness, they will not sink into the recesses during painting, making it easy to form a mottled pattern.

[0033] The concave portions of the painting tool are preferably made of fiber, which allows paint to be easily absorbed and supplied to the convex portions, thereby enabling a stable formation of a design-oriented pattern. More preferably, a material having woven or woven fibers, such as those used in painting rollers, is more likely to contain the paint, allowing for continuous painting.

[0034] The shape of the painting tool may be any shape that allows the paint to be applied, but a block shape, roller shape, etc. is preferable. A block shape can be applied by rubbing or hitting the surface to be painted to form a pattern. Rollers are used in many painting applications and are stable and easy to apply. Also, by making the roller uneven, patterns can be easily formed.

[0035] The coating method of the present disclosure is often used when coating objects such as pillars, beams, floors, and walls that constitute buildings. Examples of substrates for painting include mortar, concrete, ALC panels, extruded boards, siding boards, calcium silicate boards, gypsum boards, fiber-reinforced cement boards, and lightweight cement boards, all of which contain inorganic components such as cement.

[0036] Other examples include metal products such as steel, iron sheets, metal siding, etc. Other examples include tiles, glass, stone, wood, and plastic products. Furthermore, some of these have a coating formed thereon.

[0037] These coating substrates are used as the surfaces to be coated, and coating is carried out using the coating material, coating tray, and coating tool described above. First, the coating material is placed on an absorbent material to soak it in the coating material, and the coating tool is pressed against the absorbent material to apply the coating material to the coating tool. By tapping the surface to be painted with this painting tool, or by rolling the painting tool if it is a roller, paint can be applied to the surface to be painted, forming a pattern with excellent design. In particular, it is easy to create a mottled pattern because the paint does not stick too much to the painting tool.

[0038] Before forming this pattern, a paint may be applied to a base to form a coating film, which may then be used as the surface to be painted. If you wish to make the most of the color and design of the base, a clear paint is preferred. This clear paint may contain a sealer to improve adhesion and prevent uneven absorption, and a water repellent to prevent wet skin when the surface to be painted is mortar or concrete.

[0039] When hiding the color or design of the painted base, enamel paint is preferred. This enamel paint is the paint used to form patterns as described above, and it is preferable that the hiding rate is 90% or more. If the concealment rate is less than 90%, the base may show through and the desired design may not be formed. A concealment rate of 95% or more is more preferable, allowing the desired design to be formed without the base showing through.

[0040] In this way, a paint may be applied to a base material to form a coating film, and the resulting surface may be used as a coating surface. It is preferable that the color of the paint used to form the pattern on the surface to be coated is different from that of the paint used to form the pattern. If the color of the paint used to form the pattern is the same as that of the surface to be coated, the pattern will not stand out and the design will not be good.

[0041] More preferably, the color difference ΔE between the paint used to form the pattern and the coated surface is 1 or more, and even more preferably, the color difference ΔE is 2 or more. If the color difference ΔE is smaller than 1, it is difficult to visually distinguish the difference in color tone. If ΔE is 2 or more, the difference in color tone can be expressed, and a texture and feel with excellent design properties are created. In addition, after forming a pattern on the surface to be coated, paint of a different color can be applied using the coating tool. By applying paint of different colors and forming coating films of different colors, a complex pattern can be formed, resulting in a more aesthetically pleasing pattern.

[0042] After forming a pattern on the surface to be painted in this way, a clear paint can be applied to the entire surface. By applying a clear paint, the pattern can be protected, improving weather resistance and stain resistance, and allowing the pattern to be maintained for a long period of time. The coating method of the present disclosure constituted by these will be described in more detail with reference to the embodiments.

[0043] Example 1 Concrete was used as the base for painting, and after the entire surface was painted with an alkoxysilane water repellent using a wool roller, paint A, which uses cement and synthetic resin emulsion as a binder, was applied. This paint A was made by mixing 20 parts by weight of Portland cement, 10 parts by weight of calcium carbonate, 2 parts by weight of coloring pigment, 0.5 parts by weight of viscosity modifier, 45 parts by weight of acrylic synthetic resin emulsion, and 22.5 parts by weight of water. The viscosity at that time was measured using a Brookfield viscometer and found to be 0.5 Pa·s at 23°C, 20 rpm, and 60 seconds.

[0044] The method of applying Paint A was to place Paint A on a 10 x 10 x 4 cm block of chip urethane as a paint tray, and then use a 10 x 10 x 4 cm block of chip urethane as a painting tool.The painting tool was placed on top of the block of chip urethane with Paint A on it, applying Paint A to it, and then tapping it onto the painted surface randomly. Furthermore, this chip urethane was hard enough that it did not sink when a weight weighing 1.0 kg with a contact area of ​​7 x 7 cm was placed on it.

[0045] The finished product of this painting process was that Paint A was applied in patches, and the coating film formed from Paint A was translucent, so it was possible to make use of the pattern of the underlying concrete while concealing defects such as dirty areas on the concrete surface, resulting in a beautiful exposed concrete finish.

[0046] Example 2 A slate board was used as the painting base, and Paint B, a matte acrylic resin emulsion paint with a Munsell value of 7.5R4 / 8, was painted over the entire surface with a wool roller, and then Paint C, a matte acrylic resin emulsion paint with a Munsell value of 7.5R3 / 3, was applied. When the viscosity of Paint B and Paint C was measured with a Brookfield viscometer at 23°C, 20 rpm, and 60 seconds, Paint B had a viscosity of 5.1 Pa s and Paint C had a viscosity of 4.8 Pa s. In addition, the hiding rate for a coating thickness of 150 μm was 98% for Paint B and 97% for Paint C.

[0047] The method of applying Paint C was to place Paint C on a 20 x 25 x 4 cm block of chipped urethane as a paint tray, and as a painting tool, a special roller was prepared, which was a 6-inch wide wool roller with 12 mm bristles, to which chipped urethane pieces roughly 1.5 cm square were randomly attached to create an uneven surface. This special roller was rolled over a block of chip urethane with Paint C on it to apply Paint C, and then the paint was applied randomly to the painted surface.

[0048] Furthermore, after paint C had dried, paint D, which was a matte acrylic resin emulsion paint with a Munsell value of 10R3 / 4, was applied in the same manner as paint C. The finished product, which was painted in this way, had a mottled pattern of paint C and paint D, giving it a superior finish with depth. In addition, painting with a special roller allowed for a stable and easy finish.

[0049] Comparative Example 1 The coating method was the same as in Example 1, except that the coating tool was changed to a wool roller with a width of 6 inches and a bristle length of 12 mm. By coating the paint A with the wool roller, the entire coated surface became a single pattern. Comparative Example 2 Unlike the painting method in Example 2, instead of placing the paint on chip urethane, the paint was placed in a painting bucket and painted using a special roller. Because the roller bucket was made of plastic, the paint was not absorbed by the roller bucket and ended up in large amounts on the special roller of the painting tool, resulting in too much paint on the painted surface and making it impossible to obtain the intended pattern.

Claims

1. In a coating method for coating an object with paint, The paint is contained in a paint tray formed by an absorbent body, The paint is transferred to a painting tool, This is a painting method in which the transferred paint is applied to the object to be painted.

2. 2. The coating method according to claim 1, wherein the surface of said coating tool has an absorbent paint-retaining layer, said paint-retaining layer being composed of a plurality of types of absorbents having different absorptivities.

3. 3. The coating method according to claim 1, wherein the paint retaining layer has an uneven surface.

4. 4. A coating method according to claim 3, wherein the convex portions of said uneven paint retaining layer are made of an absorbent material having a smaller paint absorbing and retaining ability than the concave portions.

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