JP2020131114A - Coating method for paint including granular coloring material - Google Patents

Abstract

To provide a coating method capable of easily coating a paint including a granular coloring material composed of granules of granular coloring material in paints such as a multicolor paint or rock-tone paint and capable of obtaining a favorable painted surface in a finished article.SOLUTION: There is provided a coating method comprising applying a primer using a coating roller, drying and then applying irregularly a granular coloring material-including paint composed of granular coloring material including plural colors using the coating roller. The color difference ΔE between a base color of the granular coloring material-including paint and a primer color is 10 or less. Thereby, the granular coloring material-including paint composed of granules of the granular coloring material in a multicolor paint, rock-tone paint or the like can be easily applied using the coating roller, and the favorable finish of a painted surface can be obtained.SELECTED DRAWING: None

Description

The present disclosure is a coating method for painting the inner and outer wall surfaces of a structure such as a building, and particularly relates to a coating method for a granular color material-containing paint for finishing a granular color material-containing paint.

Conventionally, the inner and outer wall surfaces of structures such as buildings are often painted with paint for the purpose of beautifying and protecting the surface.
For this beautification, various paints in which gelled colored particles are dispersed and stone-like paints containing colored aggregates may be used.

The finish of the wall surface or the like painted with the granular color material-containing paint such as the colorful paint or the stone-like paint is composed of the particles of the granular color material, and is beautifully dressed with a variety of feeling. ..
However, it is difficult to paint these granular color material-containing paints with a painting roller, and spray painting is often performed mainly using a spray gun or the like.

Therefore, when painting these paints, there are problems such as paint scattering and difficulty in painting.
When the granular color material-containing paint is coated with a coating roller, the granular color material may not be evenly scattered on the painted surface and may be lined up in a streak in the painting direction. In some cases, the desired granular color material does not adhere to the coated surface and remains on the coating roller.

In this way, the painted surface often does not have a uniform finish with a variety of feelings.
Based on these, a method of applying a water-based multicolored pattern finishing material (patented), in which a water-based multicolored paint is evenly distributed to the coating base with a coating roller, and then the distributed paint is pressed in a certain direction with a presser to finish. Document 1) has been proposed.

This is to apply a variety of water-based paint with gelled colored particles dispersed in water to the paint base evenly and easily with a roller, press and finish, and press the distributed paint in a certain direction. The uneven painted surface is crushed, and a smaller amount of material is used to create a uniform pattern with high concealment of the base.
By suppressing the uneven coating of the material when distributing the rollers and the uneven coating of the jointed portion, the finish can be made uniform and the paint scattering during painting can be reduced.

Japanese Unexamined Patent Publication No. 2006-326494

However, in the method of constructing the water-based multi-pattern finishing material of Patent Document 1, it is possible to finish uniformly by suppressing the uneven coating of the material at the time of distributing and coating the rollers and the uneven coating of the jointed portion. Depending on the situation, streaks may be formed and the finish may not be good.
By pressing the particles, the colored particles dispersed in the finishing material may be crushed and flow in the pulling direction.

Further, when the colored particles are crushed, the desired design feeling may not be obtained depending on the crushing method. Further, since the pressing is performed after the coating is distributed, unevenness due to the pressing may occur depending on the degree of drying of the finishing material, that is, depending on the process interval.
This presser foot requires skill and is difficult to perform easily, and the painting process is also complicated.

According to the present disclosure, a paint containing a granular color material composed of grains of a granular color material such as a multicolored paint or a stone-like paint can be easily painted by a coating roller, and a painted surface having a good finish can be obtained. Is to provide a painting method that can be used.

This is a coating method in which the undercoat paint is applied with a coating roller, dried, and then the granular color material-containing paint composed of multiple color granular color materials is applied unevenly with the coating roller, and is the base of the granular color material-containing paint. The color difference from the color of the undercoat paint is ΔE = 10 or less.
As a result, the granular color material-containing paint composed of grains of granular color material such as various paints and stone-like paints can be easily painted with a coating roller, and a painted surface with a good finish can be obtained. it can.

By including the aggregate having an average particle size in the range of 150 to 800 μm in the undercoat paint, the granular color material can be more easily fixed and a stable finish can be obtained.
Since the coating roller is sponge-like, it can contain a relatively large amount of paint, so that the area to be applied at one time becomes large, and efficient work can be performed.

The surface to be painted has a tile pattern, the tile portion and the joint portion are formed by unevenness, and the short side of the tile portion is shorter than the length of the coating roller.
As a result, the coating joint by the coating roller is inconspicuous and a good finish is obtained.

The embodiments of the present disclosure will be described in detail.
In the method of applying the granular color material-containing paint of the present disclosure, the undercoat paint is applied with a coating roller, dried, and then the granular color material-containing paint composed of a plurality of colors of granular color materials is applied unevenly with a coating roller. In the coating method, the base color of the granular color material-containing paint has a color difference of ΔE = 10 or less from the color of the undercoat paint.

First, the color difference (ΔE) is the difference between the base color of the granular color material-containing paint and the color of the undercoat paint, which is a numerical value of the color difference, and is measured by JIS K 5600-4-6. The method is described.
The base color of the reference granular color material-containing paint is measured, the color of the target undercoat paint is measured, and the color difference (ΔE) from that color is obtained.

This color difference (ΔE) is ΔL * = L * (reference) -L * (target), Δa * = a * (reference) -a * (target), Δb * = b * (reference) -Δb * (target). ), It is represented by ΔE = (ΔL * ² + Δa * ² + Δb * ² ) ^0.5 .
The granular color material-containing paint is a paint containing a granular color material and a synthetic resin as a main component, such as a colorful paint using gel-like colored particles and a stone-like paint using colored aggregate.

A good design can be obtained on the surface to be coated by applying the undercoat paint described later to the granular color material-containing paint and then coating the paint in an uneven shape with a coating roller.
That is, the color of the coating film obtained with the undercoat paint and the color of the coating film with the granular color material-containing paint are similar (color difference ΔE = 10 or less), and the coating film of the granular color material-containing paint painted unevenly Even if the recesses are transparent, the painted surface can be obtained without becoming spots.

In addition, by applying the granular color material-containing paint in an uneven shape, each convex part can be made independent, and unevenness such as that of the granular color material can be reduced, and the painted surface becomes uneven, resulting in a finish. It can bring a profound feeling.
Among the granular color material-containing paints, the multicolored paint using gel-like colored particles is a coating film formed by dispersing a plurality of gel-like colored particles in a synthetic resin such as a single-color paint or a clear paint. It is possible to easily obtain a colorful design in which the particles are present in a granular form in the coating film.

This multicolored paint is preferably used because it can be finished with a relatively thin film and a versatile feeling as compared with the stone-like paint described later.
The gel-like colored particles used in this colorful paint are gel-like particles made from a liquid coloring material such as paint or coloring liquid, and retain their shape in a soft state containing the solvent of the paint. is there.

The shape of the gel-like colored particles is not limited to a spherical shape, but includes an elliptical shape, a disk shape, a cylindrical shape, a shape similar to these, and an irregular substantially spherical shape close to a circle.
The size of the gel-like colored particles is preferably in the range of 45 to 1500 μm, and when a plurality of gel-like colored particles having different colors and sizes are mixed, the coating film has a shadowy feeling and has a three-dimensional design. , It will be an excellent one with a clear colorful pattern and a natural texture.

If the size is smaller than 45 μm, the base color of the coating film formed by the granular color material-containing paint may cover other gel-like colored particles, which may affect the colorfulness. If it is larger than 1500 μm, the coating roller may be clogged during coating, causing coating spots.
It is preferable that the gel-like colored particles having a size in the range of 45 to 1500 μm occupy 60% or more on the painted surface, whereby the colorful feeling of the various paints can be well expressed.

If it is less than 60%, the feeling of versatility may be slightly inferior, and spots due to painting may occur, and a good finish may not be obtained.
The amount of this colorful paint applied is preferably 150 to 800 g / m ^2, and if it is within this range, not only the one formed by the gel-like colored particles but also the three-dimensional effect and the shadow effect can be obtained. It has, and the base can be seen through, making it an excellent design with a complex depth.

Further, the thickness of the coating film is preferably in the range of 20 to 500 μm, and the object to be coated can be sufficiently coated, and a coated object having excellent weather resistance can be obtained.
Since the solid content of the gel-like colored particles is in the range of 10 to 40% by weight, the resin content is in the range of 5 to 25% by weight, and the size is in the range of 45 to 1500 μm, the gel-like particles in the paint It has better shape stability and can express clear particles even in a coating film made of various paints.

A stone-like paint using colored aggregate is a mixture of a plurality of colored aggregates dispersed in a synthetic resin such as a clear paint, and the formed coating film has particles in the coating film as in the case of various paints. It is possible to easily obtain a colorful design that existed in a granular form.
Colored aggregates are foams of natural sand such as silica sand, crushed natural stone including silica stone, cold water stone, marble, and granite, crushed ceramics, glass, beads made of plastic, black stone, pearlite, and glass powder. It is a colored aggregate such as lightweight aggregate, and these colored aggregates are often used by adjusting the particle size.

In addition, there is also a colored aggregate in which these colored aggregates are colored to stabilize the color. Further, glass beads in which glass is substantially spherical and those in which synthetic resin is substantially spherical are also included.
Of these, colored aggregate is preferably used because it stabilizes the particle size and color. This colored aggregate is for coloring an aggregate such as silica sand or cold water sand, and a coating layer is provided on the surface of the aggregate with a coloring material such as paint.

The particle size of the colored aggregate is preferably in the range of 45 to 1500 μm, and more preferably in the range of 45 to 1000 μm.
When the particle size is smaller than 45 μm, it is difficult to express the colorfulness of the granular color material, and when it is larger than 1500 μm, it may be difficult to paint with a coating roller.

Synthetic resins such as clear paints that mix gel-like particles and colored aggregates are binders for granular color material-containing paints, and bind the surface to be coated and the granular color material-containing paints.
Further, it is preferable that the color of the granular color material and its texture are utilized, and the material becomes transparent after being dried and formed into a film in order to enhance the design feeling.

This synthetic resin is a single or copolymerized resin such as acrylic resin, urethane resin, vinyl chloride resin, silicone resin, vinyl acetate resin, polyester resin, styrene resin, and fluororesin, and these resins are dissolved in an organic solvent. A plastic or an emulsion dispersed in water is used.
Synthetic resin emulsions are preferably used because of the ease of use, manufacture, and availability of paints.

The synthetic resin emulsion may be a general one that can be produced by a common polymerization technique such as emulsion polymerization, and is superior to acrylic resin and styrene resin in terms of paint suitability, coating material properties, and availability. The produced acrylic synthetic resin emulsion and acrylic styrene synthetic resin emulsion are preferable.
This granular colorant-containing paint is generally used for manufacturing paints such as low-boiling alcohol, high-boiling solvent, surfactant, thickener, coloring pigment, flame retardant, pH adjuster, preservative, etc. as other additives. Ingredients blended in can be used.

High boiling point solvents are used as film-forming aids and antifreeze agents, and surfactants are used as defoamers, dispersants, wetting agents and the like. Thickeners are used for viscosity and viscosity adjustment.
Examples of flame retardants include aluminum hydroxide, halogen-based compounds, phosphorus-based compounds, and antimony trioxide-based compounds. Further, if necessary, a white pigment such as titanium oxide and a filler such as calcium carbonate can be added.

The granular color material-containing paint is composed of such materials. The base color of the granular color material-containing paint is a color composed of relatively fine granular color materials, and is the ground color of the paint or the coating film.
This color and the color of the coating film obtained by the undercoat paint are adjusted to be close to each other (color difference ΔE = 10 or less).

The undercoat paint is applied to the surface to be coated before the coating of the granular color material-containing paint, and the color of the coating film obtained by the undercoat paint is close to the color of the coating film of the granular color material-containing paint (color difference ΔE = 10 or less). ) Must be.
As a result, the granular color material-containing paint composed of grains of granular color material such as various paints and stone-like paints can be easily painted by the coating roller, and the finish is also the coating film of the granular color material-containing paint. Even if the recess is thin, the finish will be the same color, and a good painted surface can be obtained.

The undercoat paint may be toned to a required color, has good adhesion to the surface to be coated, and has good adhesion to the granular color material-containing paint, and is preferable. Since it may be partially exposed, it is preferable to have excellent durability such as weather resistance.
The undercoat paint may be one that is generally commercially available, and is mainly composed of a synthetic resin and contains a white pigment, a coloring pigment, and a filler component.

In addition, other additives generally used in paint production such as low boiling alcohol, high boiling solvent, surfactant, thickener, flame retardant, pH adjuster, preservative, etc. are often used. ..
In addition, inorganic binders such as cement and colloidal silica may be added.

A synthetic resin emulsion is often used for this synthetic resin, and a water-based undercoat paint using this as a binder is often used. With this water-based undercoat paint, the adhesion to the granular color material-containing paint is more excellent, and the durability is excellent.
This synthetic resin emulsion is similar to the granular color material-containing paint, and may be a general one that can be produced by a common polymerization technique such as emulsion polymerization. Acrylic resin, silicone resin, styrene resin, urethane resin, fluorine. Examples thereof include synthetic resin emulsions produced from resins such as resins.

Further, by containing one or two of the white pigment and the filler component, a relatively thick undercoat layer can be formed, and the color of the base and some irregularities can be hidden. The finish will be better.
This white pigment includes titanium oxide, zinc oxide, etc., and is mainly for hiding the color of the base and improving the finish of the paint containing a granular color material.

Examples of the filler component include calcium carbonate, diatomaceous earth, kaolin, talc, clay, bentonite, white carbon, glass beads, plastic beads, aluminum hydroxide, silica sand, etc., and by giving volume to the coating film, the unevenness of the base is uneven. The degree can be reduced.
The average particle size of this filler component is often 150 μm or less, and calcium carbonate, diatomaceous earth, aluminum hydroxide, and silica sand can be easily obtained and are therefore preferably used.

In addition, a coloring pigment for coloring is added to adjust the base color of the paint containing a granular coloring material. The colored pigments include inorganic pigments such as iron oxide and organic pigments.
The content of these pigments such as white pigments and extender pigments is preferably in the range where the pigment volume concentration (PVC) of the undercoat paint is 10% to 80%, and more preferably in the range of 30 to 70%.

When the pigment volume concentration is less than 10%, the hiding property of the coating film formed by the undercoat paint is lowered, and when it exceeds 80%, the resin amount of the coating film is small, which affects the durability and finish. May be given.
Therefore, the pigment volume concentration is adjusted as necessary within this range, but by adjusting the pigment volume concentration within the range of 30 to 70%, the finish will be better.

If it is less than 30% by weight, it is difficult to finish the unevenness of the base inconspicuously, and if it exceeds 70% by weight, the finish of the granular color material-containing paint cannot obtain the desired luster. May be bad.
It is preferable that the undercoat paint contains an aggregate having an average particle size in the range of 150 to 800 μm. As a result, the granular color material is more easily fixed, and a stable finish can be obtained.

That is, this aggregate makes it easier for the granular color material to get caught in the coating film and easily adheres to the coating film with the undercoat paint. Further, the coating roller can be coated by stable rotation without slipping.
Cold water sand, silica sand, or the like is often used as this aggregate, and the content thereof is preferably in the range of 20 to 50% by weight with respect to the undercoat paint. Within this range, it becomes relatively easy to apply.

Next, the coating roller is for coating the surface to be coated with the undercoat paint or the granular color material-containing paint, and generally commercially available ones can be used.
This coating roller becomes a coating roller that can be coated by attaching the coating roller cover to the roller device.

The roller cover for coating is composed of a cylindrical member and a paint holding layer. This paint holding layer has a space inside which the paint can be contained, and when it is immersed in the paint and pressure is applied to deform it and the pressure is released, it absorbs the liquid in a form that replaces the air in the space and holds the paint. Can be done.
The paint held in this way comes into contact with the surface to be painted, is released by the pressure at the time of painting, and can be painted.

The paint holding layer can include an undercoat paint and a paint containing a granular color material, and a fibrous hair-like material or a sponge-like material is used.
In many cases, fibrous hair is used, and this coating roller is made by flocking fibrous hair on a cylindrical member, and there is something called a wool roller, and the fibrous hair is wool. There is one that uses the shape.

There are various types of wool rollers with different hair lengths, materials, sizes and shapes.
Wool rollers can be roughly classified into three types, and are classified according to the length from the surface of the cylindrical member to the tip of the hair (hereinafter referred to as the hair foot). This fluff becomes a paint holding layer.

There are short hair rollers with short hair feet of about 4 to 5 mm, medium hair rollers with medium hair feet of about 13 mm, and long hair rollers with hair feet of 20 mm or more.
This short-haired roller can obtain a smooth finish because the hair is short, and it is easy to keep the coating uniform, and it is often used when painting with the pattern on the outer wall as it is.

The medium-hair roller is the most widely used wool roller, and the long-hair roller can be easily painted even on an uneven painted surface because the hair has long hair.
The sponge-like coating roller is called a sponge roller or a sand bone roller, and the paint holding layer can be adjusted by changing the thickness and voids of the sponge.

In addition, a large amount of paint can be contained at one time, and a sufficient amount of paint can be uniformly applied.
As the coating roller, a sponge-like coating roller is preferably used when coating a paint containing a granular color material.

By utilizing the pattern formed by the voids of the sponge, the granular color material-containing paint can be applied to stable unevenness. In addition, since it can contain a relatively large amount, the area to be applied at one time becomes large, and the elastic voids of the paint holding layer are well adapted to the coating film formed by the undercoat paint, and the work can be performed efficiently. it can.
The length of the paint holding layer of the coating roller is preferably in the range of 50 to 300 mm. If it is smaller than 50 mm, the number of joints in the painting work increases, and painting spots may be conspicuous.

Further, if it is larger than 300 mm, it may be difficult to handle. If it is in the range of 100 to 200 mm, the work is easy and the number of recoating is relatively small, which is more preferable.
The outer diameter of the paint holding layer is preferably in the range of 20 to 75 mm in diameter, and this range is suitable for painting workability, the amount of paint that can be held is appropriate, and stable painting is possible. Is something that can be done.

As a result, the coating method of the present disclosure is applied to the surface to be coated. The surface to be painted is applied to various objects such as concrete, mortar, ALC panels, siding boards, extruded boards, gypsum boards, slate, ceramics, plastics, wood, stones, and tiles that make up the walls of buildings. It is possible to do.
When the surface to be painted has a tile pattern, the tile portion and the joint portion are formed by unevenness, and the short side of the tile portion is shorter than the length of the coating roller, the coating joint by the coating roller is inconspicuous and good. It will be a nice finish.
This is because the tile portion can be painted without being repainted, so that the spots in the painting are further reduced.
The coating method composed of these will be described in detail in the embodiment.

In the first embodiment, the wall surface of the building was painted. This building was constructed of reinforced concrete, and the object of its painting was a concrete surface, and a variety paint 1 and an undercoat paint A were prepared as granular color material-containing paints. These paints were gray paints.
Apart from this undercoat paint A, a black undercoat paint B was also prepared. This is for comparison of the finish, and it was decided to prepare a 1 m × 1 m slate plate separately from the surface to be painted and apply it to the slate plate.

The concrete surface to be painted was cured, and the defective part was repaired and primed.
Both the multicolor paint 1 and the undercoat paint A were grayish colors, and the color difference was ΔE = 3.2. Since the color tones of the multicolored paint 1 and the undercoat paint B were different from those of the gray type and the black type, the color difference was ΔE = 6.5.

In the measurement of this color difference, each paint is applied so as to be as flat as possible on the mount, a coating film is formed, and the color of the coating film is measured by a measurement method according to JIS K 5600-4-6. The measurement was performed using the product, and the difference was determined.
The measurement portion of the colorful paint 1 was measured for the color of the gray portion as the base color.

The multicolored paint 1 using the gel-like colored particles was obtained by dispersing a plurality of nearly amorphous, substantially spherical gel-like colored particles in a clear paint of an acrylic resin emulsion.
Most of the gel-like colored particles constituting the multicolored paint 1 are gray and have a particle size of 45 to 800 μm, and include white and black gel-like colored particles of about 1000 μm in the particles. It was.

The undercoat paint A and the undercoat paint B are paints that differ only in color, and these undercoat paints are generally commercially available and contain an acrylic synthetic resin emulsion as a main component.
Titanium oxide is used as a white pigment, calcium carbonate is used as a filler component, and inorganic carbon black is used as a coloring pigment to adjust the color to gray and black. The pigment volume concentration (PVC) of these undercoat paints was about 65%.

40% by weight of silica sand having an average particle size of 500 μm was mixed with each of the undercoat paints A and B as an aggregate.
As the coating roller cover used for coating the colorful paint 1, a sand bone roller having a sponge-like paint holding layer was used. This sand-bone roller had a fine sponge. A roller cover for painting was attached to a roller device to make a roller for painting.

The coating roller used to apply the undercoat paints A and B is a wool roller in which fibrous hair is planted on a cylindrical member to form a paint holding layer, and the hair has a medium length of about 13 mm. A medium-hair roller was used as a roller cover for painting, and the roller cover for painting was attached to a roller device and used.
The length of the paint holding layer of these coating rollers was 200 mm, and the outer diameter thereof was 50 mm in diameter.

These paints and coating rollers were prepared and applied and painted. The undercoat paints A and B were applied by a roller for painting medium hair. The surface became rough due to the mixed aggregate.
Various paint 1 was applied to this surface. Since the sponge of the sand-bone roller had fine meshes in this painting, a pattern due to the voids of the sponge was formed on the surface after painting, and it was possible to paint on small irregularities. The coating amount at this time was about 500 g / m ² .

In addition, a relatively large amount of the colorful paint 1 can be contained, the area to be coated is widened, and the elastic voids of the sponge are well adapted to the coating film formed by the undercoat paint, and the work is performed efficiently. Was made.
The colorful paint 1 is easily caught on the aggregate of the coating film formed by the undercoat paints A and B, and the coating roller can be coated by stable rotation without slipping.

After the paint was dried, the painted surface and the slate plate were confirmed. The film thickness of the multicolored paint 1 was about 100 μm on average.
In both cases, by applying the granular color material-containing paint in an uneven shape, each convex part can be made independent, and the amount of gel-like colored particles can be reduced, and the painted surface becomes uneven, resulting in a finished product. I was able to bring a profound feeling.

The finish painted on the concrete surface was good with no color spots. However, in the case where the slate plate was painted, the black color of the undercoat paint B was partially conspicuous and had color spots. This is because the recesses of the coating film formed by the multicolored paint 1 are present as spots, so that the portions are transparent and the color of the coating film of the undercoat paint B is conspicuous.
In this way, the colorful paint 1 can be easily painted with the coating roller, and even if the concave portions of the coating film of the colorful paint 1 painted unevenly are transparent, they are not spotted and are painted in the same color. The finish is as if it were, and a good painted surface can be obtained.

In the next embodiment 2, the wall surface of the building whose outer wall is formed by the tile-shaped siding board is painted. This building was a repainting of a detached house and was a painting on the surface of an existing paint film.
For this coating, a stone-like paint 1 and an undercoat paint C were prepared as granular color material-containing paints. These paints were cream-based paints.

In this case as well, as in the first embodiment, a red-based undercoat paint D is also prepared in addition to the undercoat paint C. This is for comparison of the finish, and it was decided to prepare a 1 m × 1 m slate plate separately from the surface to be painted and apply it to the slate plate.
Before painting, the surface to be painted was cleaned, the necessary parts were cured, and the defective parts were repaired and primer treatment was performed.

Both the stone-like paint 1 and the undercoat paint C were cream-based colors, and the color difference was ΔE = 1.3. Since the stone-like paint 1 and the undercoat paint D had different colors from the cream-based paint and the red-based paint, the color difference was ΔE = 7.2.
The measurement portion of the stone-like paint 1 was measured for the color of the cream portion as the base color.

The stone-like paint 1 using this colored aggregate was obtained by dispersing cold water sand and colored aggregate in an acrylic resin emulsion.
The particle size of the cold water sand and the colored aggregate constituting the stone-like paint 1 was 45 to 500 μm, and the black colored aggregate of about 1000 μm was contained therein.

The undercoat paint C and the undercoat paint D are paints that differ only in color, and these undercoat paints are generally commercially available and contain a synthetic resin emulsion of acrylic styrene as a main component.
Titanium oxide is used as the white pigment, calcium carbonate is used as a filler component, and an inorganic coloring pigment is used to adjust the color to a color different from cream and red. The pigment volume concentration (PVC) of these undercoat paints was about 55%.

50% by weight of silica sand having an average particle size of 800 μm was mixed with the undercoat paint as an aggregate.
As the coating roller cover used for coating the stone-like paint 1 and the undercoat paints C and D, a sand-bone roller having a sponge-like paint holding layer was used. For the stone-like paint, the sponge of the sand-bone roller was slightly fine-grained, and for the undercoat paints C and D, the sponge of the sand-bone roller was slightly coarse-grained. This coating roller cover was attached to a roller device to form a coating roller.

The length of the paint holding layer of these coating rollers was 200 mm, and the outer diameter thereof was 60 mm.
Such paints and coating rollers were prepared and painted. Since the undercoat paints C and D were applied with a sand bone roller, the surface of the undercoat paints C and D had large irregularities, and the mixed aggregates resulted in a rough state.

The stone-like paint 1 was applied to this surface. Since the sponge of the sand-bone roller was slightly fine in this painting, the painted surface on the surface after painting was formed by the pattern due to the voids of the sponge and the unevenness formed by the undercoat paints C and D. Was able to obtain a coating film in which unevenness was emphasized. The coating amount at this time was about 800 g / m ² .
In addition, this can also contain a relatively large amount of paint, the area to be applied is wide, and the elastic voids of the sponge are well adapted to the coating film formed by the undercoat paint, and work efficiently. Was made.

In both cases, the stone-like paint was easily caught on the aggregate of the coating film formed by the undercoat paints C and D, and the coating roller could be painted by stable rotation without slipping.
After the paint was dried, the siding surface and slate plate were confirmed. The film thickness of the stone-like paint 1 was about 1 mm on average.

In both cases, by applying the stone-like paint 1 in an uneven shape, it is possible to check the cold water sand and the particles of the colored aggregate evenly in an independent state for each convex part, and the painted surface becomes uneven, and the finish is obtained. It was possible to bring a profound feeling.

The finish painted on the concrete surface was good with no color spots. However, for those who painted on the slate board, the red color of the undercoat paint was partially confirmed, resulting in a mottled finish. This is because the recesses of the coating film formed by the stone-like paint 1 are mottled, so that the portions are transparent and the color of the coating film of the undercoat paint is conspicuous.
In this way, the stone-like paint 1 can be easily painted with a painting roller, and even if the concave portions of the uneven coating film are transparent, they do not become spots and the finish is as if they were painted in the same color. A good painted surface can be obtained.

Further, this siding board has a tile-like pattern, and the stone-like paint 1 is applied only to the tile-like pattern, and since each tile-like pattern is painted, it is possible to finish without repainting at the time of painting. It was.
As described above, according to this embodiment, the following effects are exhibited.

This is a painting method in which the undercoat paint is applied with a coating roller, dried, and then the various paints composed of gel-like coloring materials of multiple colors are applied unevenly with the coating rollers. The base color of the various paints is the undercoat paint. The color difference from the color is ΔE = 10 or less.
As a result, coating can be easily performed by the coating roller, and a relatively thin film with a good finish can be obtained with a versatile coating surface.

When the size of the gel-like colored particles is in the range of 45 to 1500 μm, a shaded feeling is generated in the coating film when a plurality of gel-like colored particles having different colors and sizes are mixed, and the design has a three-dimensional effect. It is an excellent product with a clear colorful pattern and a natural texture.

Since the gel-like colored particles having a size in the range of 45 to 1500 μm occupy 60% or more on the painted surface, the colorful feeling of the various paints can be well expressed.
By applying the various paints so that the coating amount is 150 to 800 g / m ² , not only those formed by gel-like colored particles but also three-dimensional and shaded feelings are obtained, and the base can be seen through. , It will be excellent in design with complex depth.

When the thickness of the coating film formed by the various paints is in the range of 20 to 500 μm, the object to be coated can be sufficiently coated, and a coated object having excellent weather resistance can be obtained.
When the pigment volume concentration (PVC) of the undercoat paint is in the range of 10% to 80%, the granular color material can be more easily fixed, the underlying color can be hidden, and the durability of the coating film is stable. Can be obtained.

Claims (4)

This is a coating method in which the undercoat paint is applied with a coating roller, dried, and then the granular color material-containing paint composed of multiple color granular color materials is applied unevenly with the coating roller.
A method for applying a granular color material-containing paint in which the base color of the granular color material-containing paint is the color of the undercoat paint and ΔE = 10 or less. The method for applying a granular color material-containing paint according to claim 1, wherein the undercoat paint contains an aggregate having an average particle size in the range of 25 to 800 μm. The method for coating a granular color material-containing paint according to claim 1, wherein the coating roller used for coating the granular color material-containing paint is sponge-like. The method according to any one of claims 1 to 3, wherein the surface to be painted has a tile pattern, the tile portion and the joint portion are formed by unevenness, and the short side of the tile portion is shorter than the length of the coating roller. How to apply granular color material-containing paint.