JPH10205098A - Building material and coating method for building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring a profile of a dotted coating film into an intelligible and to prevent unevenness in painting from being noticed by a method wherein two or more kinds of paint specifying the contrast ratio of the coating film is applied in a dotted state on the surface to be coated of a building material. SOLUTION: In coating of a building material, treatment is applied on the surface of the building material when occasion demands and a surface to be coated proper to coating is formed, and coating is applied on a surface to be coated for metallic coating having a metal-tome glossiness and a surface to be coated of a metal, such as aluminum and a stainless material. In a coating method, paint having the contract ratio of a coating film being 0.7 or less, a thixo factor being 1-2 in a ratio of viscosity 5rpm/50rpm measured by a B type rotary viscometer, and viscosity being a flow time of 18 second or less by a Ford cup No. 4 method is applied by using a spray gun. This method provides a novel color tone by overlapping a coating film having a low contrast ratio and the surface to be coated with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building material obtained by applying a pattern to a building material used for the exterior or interior of a building, and a method of coating the building material.

[0002]

2. Description of the Related Art Conventionally, a method of applying a paint to a building material is to apply a spray, a flow coater or a roll coater, and to apply a single color at most two colors. Japanese Patent Laid-Open No.
JP-A-157160 and JP-A-3-186381 disclose a method of applying a paint having a large thixotropy to such an extent that the paint is not atomized.

[0003]

However, when the coating is performed by this method, the outline of the spot-like pattern becomes clear, and the coating unevenness tends to be conspicuous. Also for this,
A monotonous spot pattern was formed, and it was difficult to obtain a natural stone-like appearance. Therefore, an object of the present invention is to provide a building material having a spot-like pattern in which uneven coating is less noticeable, and a method of coating the building material. Another object of the present invention is to provide a building material having a colorful spot-like pattern and a method of coating the building material.

[0004]

Means for Solving the Problems As a means for solving the above-mentioned problems, the present inventors have applied a paint having a performance of concealing the color of the surface to be coated in a spot-like manner to the surface to be coated. Then, it was found that by making the color of the surface to be coated transparent through the spotted coating film surface, it was possible to form a spotted pattern with less noticeable coating unevenness, and completed the present invention. That is, according to the first aspect of the present invention, the opacity of the coating film is 0.1%.
The building material is characterized in that a paint of 7 or less is applied to the surface to be coated of the building material in spots. According to this building material, since the concealment ratio of the coating film is 0.7 or less, the outline of the coating film of the paint applied in the form of spots becomes unclear and unevenness of the coating is not conspicuous. In addition, a new color tone is developed due to the overlap between the coating film having a low hiding ratio and the surface to be coated.

The invention according to claim 2 is characterized in that two or more kinds of coating materials having a coating film hiding ratio of 0.7 or less are applied in spots on the surface to be coated of the building material. It is. According to this building material, the outline of each of the two or more types of spot-like coating films becomes unclear, and the coating unevenness becomes even less noticeable. On this building material, in addition to the paint film portion of each paint, the paint film portion where two or more paints are mixed,
A coating film portion is formed in which two or more coating films having a small concealment ratio are overlapped. By virtue of these coating portions and the overlapping of these coating portions and the surface to be coated, a colorful appearance is exhibited.

A third aspect of the present invention is the building material according to the first or second aspect, wherein the surface to be coated has a metallic tone. According to this building material, the surface to be coated has a metallic tone, so the appearance may change due to the metallic color and luster of the surface to be coated, and the pattern may differ depending on the direction of light incident on the surface to be coated or the viewing direction. Is expressed.

According to a fourth aspect of the present invention, the coating film has an opacity of 0.7 or less, a thixotropic coefficient of 1 to 2 in a ratio of 5 rpm / 50 rpm measured by a B-type rotational viscometer, and a viscosity of Ford Cup No. . This is a coating method for a building material, characterized in that a paint having a flow time of 18 seconds or less in Method 4 is applied using a spray gun in a state in which the paint is not atomized or hardly atomized. According to this method, many spot-like coating films are formed on the surface to be coated of the building material.
In addition, the boundary with the spot-like coating film becomes unclear, and the uneven coating becomes inconspicuous. In addition, a new color tone is developed due to the overlap between the coating film having a low hiding ratio and the surface to be coated.

According to a fifth aspect of the present invention, there is provided the method for coating a building material according to the fourth aspect, wherein two or more kinds of the paints are used. According to this method, a spot-like coating film is formed by each paint. Further, on the surface to be coated, the respective paints are mixed or the coating films overlap, so that a colorful appearance is formed.

According to a sixth aspect of the present invention, there is provided a method according to the fifth aspect, wherein one paint and at least one other paint are applied so as to be mixed on the surface to be coated. It is. According to this method, two or more types of paints are mixed on the surface to be coated, and a coating portion having a new color tone different from the color tone of each of them is formed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
In the present invention, building materials refer to all building materials such as panel materials and square materials used for the exterior or interior of buildings. Examples of the panel material include a panel material having a cement base such as a PC panel, a GRC panel, an ALC panel, an extruded panel, and a ceramic siding panel, a steel plate, a panel material having a metal base such as stainless steel and aluminum, and ABS. And other panel materials having a plastic base. The surface of the building material is not necessarily limited to a flat surface, but may have irregularities.

The coating used in the present invention has an opacity of the coating film of 0.7 or less. The hiding ratio is the degree to which the coating film hides many differences in the color of the base. It is measured based on JIS K5400. In measuring the obscuration rate, the amount of application,
The clearance and drying conditions of the film applicator are specified respectively. The clearance of the film applicator is preferably 100 μm. When the concealment ratio of the coating film exceeds 0.7, the outline of the spot-like pattern becomes conspicuous. Preferably, the concealment ratio is 0.2 or more and 0.5 or more.
It is as follows. This is because in this range, a more varied appearance is obtained and uneven coating is less noticeable. The concealment ratio of the coating film is adjusted by adjusting the ratio of the pigment, the ratio of the clear paint, the film thickness, and the like.

Further, in the present invention, by using two or more kinds of paints, a variety of finishes can be achieved.
Further, in the present invention, by changing the kind of the color of the paint to be used, and further, by combining these colors with the color of the surface to be coated, a more colorful finish can be achieved.

As the paint used in the present invention, an acrylic resin paint, a urethane resin paint, a modified silicone resin paint, a silicone resin paint, a fluororesin paint, or the like can be selected as needed.

In order to paint a building material according to the present invention, the surface of the building material is subjected to a treatment, if necessary, to form a surface to be coated suitable for painting. In particular, in the present invention, since a paint having a small concealment ratio is used, it greatly affects the appearance of a building material in which the color tone, gloss, and texture of the coated surface can be obtained. That is, a new color tone is formed by combining the color tone of the surface to be coated with the color tone of the coating film to be formed. In addition, due to the gloss of the surface to be coated, a color tone or a pattern that changes depending on the direction of light or the viewing direction is formed, and the texture of the coating surface and the texture of the coating film are combined to form the texture of the building material. For example, the surface to be coated with a metallic coating having a metallic luster, or the surface to be coated with a metal such as aluminum or stainless steel, by coating, by the combination of the gloss and texture of the surface to be coated and the coating film, A building material with an unprecedented texture can be obtained. Therefore, the building material of the present invention is different from a normal painted building material in that the surface to be coated constitutes the appearance of the building material.

In coating the surface to be coated, a coating film is formed on the surface to be coated in a spot-like manner. Here, the speckled shape does not particularly limit the shape. The spots are circular,
It can be formed in any shape such as irregular shape, square shape, bent bar shape and the like. However, in order to perform the coating efficiently by spray coating in consideration of the coating process, it is preferable that the spots are formed in a substantially circular or irregular shape. In addition, when the shape is substantially circular or irregular, an appearance close to a natural stone can be obtained.

As a coating method, various known coating methods can be used. In the present invention, spray coating is preferable because a coating film is formed in a spot-like manner. At the time of spray coating, the viscosity was measured using Ford Cup No. It is preferable that the flow-down time in Method 4 is 18 seconds or less. If the flow time exceeds 18 seconds, the droplets of the coating material become less compatible with each other, and uneven coating becomes more conspicuous. Ford Cup No. The four methods are measured by the method described in JIS K5400. The viscosity of the paint is
The viscosity is adjusted to a predetermined value by using an organic solvent such as xylene, toluene, ethyl acetate, methyl ethyl ketone, or isopropyl alcohol or water as a diluent. The thixo coefficient was 5 rpm / 5 as measured by a B-type rotational viscometer.
0 rpm ratio (rotational speeds 5 rpm and 5
It refers to the ratio of the viscosities measured as 0 rpm (measured value at 5 rpm / measured value at 50 rpm). ) Is preferably 1 or more and 2 or less. If the ratio is less than 1, the paint will flow, and if it is greater than 2, the droplets will be too large and coating unevenness will easily occur. Furthermore, atomization air pressure of spray gun 0.5kgf
/ Cm ² or less, pattern pressure 0.5kgf / cm ² or less, discharge amount 1
It is preferable to perform the process under the conditions of 00 to 300 ml / min and the distance between the object to be coated and the spray gun is about 300 mm. By painting under these conditions, a variety of finishes can be obtained without uneven coating even when used on the inner and outer walls of a building.

When two or more types of paints are used, these paints can be applied simultaneously, or they can be applied after a while. By coating two or more paints simultaneously or with the next paint before the previously applied paint is completely solidified, the previous paint and the next paint are mixed, and the A coating having a color tone different from the color tone can be formed. As a result, the versatility on the surface to be coated is further improved. In addition, when the coating material previously applied is completely solidified to form a coating film, and then the next coating material is applied, the coating film has a new color tone and pattern due to the overlapping of the coating film and the coating film. A part is formed.

The appearance of the spot-painted building material is such that the unevenness of the coating is unclear because the boundary between the spot-shaped coating film and the surface to be coated and the overlapping spot-shaped coating film become unclear. It is no longer noticeable. In addition, since the surface to be coated and the previously formed coating film can be seen through, the respective color tones are variously combined to form new color tones and various color tones and patterns.

[0019]

According to the first aspect of the present invention, it is possible to provide a building material having a spot-like pattern in which uneven coating is less noticeable. According to the second aspect of the present invention, in addition to the effects of the first aspect of the present invention, it is possible to provide a building material having a colorful spot-like pattern. According to the third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the appearance in which the pattern looks different depending on the direction of light incident on the surface to be coated or depending on the viewing direction can be obtained. Can provide a building material. According to the fourth aspect of the present invention, it is possible to form a building material having a spot-like pattern in which the boundary with the spot-like coating film becomes unclear and coating unevenness is inconspicuous. According to the invention described in claim 5, in addition to the effect of the invention described in claim 4,
A building material having a colorful spot-like pattern can be formed.
According to the invention described in claim 6, in addition to the effects of the inventions described in claims 4 and 5, two or more paints are mixed, and a coating portion having a new color tone different from the color tone of each of the paints is mixed. Are formed, and a building material having a more colorful spot-like pattern can be formed.

[0020]

EXAMPLES Hereinafter, specific examples of the present invention will be described with reference to examples. (Test Example 1) In this test example, Example 1 was obtained based on the coating specifications shown in Table 1 and the paint and coating conditions shown in Table 2.
5 and Comparative Examples 1 and 2 were evaluated for finishability with respect to the speckled coating films. The coated surface in this test example is
Intermediate coating, that is, a coating film of a white enamel fluororesin paint (Luffton fusso white, manufactured by Suzuka Fine Co., Ltd.). The paints A and B for pattern application for each of Examples and Comparative Examples were two kinds of colored paints (for paint A, Ruffton fusso gray manufactured by Suzuka Fine Co., Ltd., and for paint B, Roughton fusso manufactured by Suzuka Fine Co., Ltd.). Black paint) was used to adjust the hiding ratio by adding a clear paint (Luffton fusso clear manufactured by Suzuka Fine Co., Ltd.). The viscosities of these paints were adjusted by adding Luffon fusso thinner manufactured by Suzuka Fine Co., Ltd. The viscosities shown in Table 2 are for Ford Cup No. The flow time (seconds) in Method 4 and the thixotropic coefficient are the ratio of the viscosities measured with a B-type rotational viscometer at 5 rpm and 50 rpm (measured value at 5 rpm / measured value at 50 rpm). Paint A and Paint B were applied simultaneously (the same applies to viscosity and thixotropy shown in Table 4). The object to be coated was an ALC panel, and the coating machine used was Volumer manufactured by Asahi Sunac Corporation.

[0021]

[Table 1]

[0022]

[Table 2]

As shown in Table 2, in each of the examples, a uniform spot-like pattern having a variety of colors and a colorful appearance was obtained. That is, the outlines of the gray and black spot-like coatings on the white coating surface become unclear, and the coating unevenness becomes inconspicuous, and the coating surface and the lower coating film are transparent with two types of coatings. The film was formed in a spot-like manner, giving a colorful spot-like pattern. In particular, in this embodiment, since the paints A and B are simultaneously coated, the two paints are mixed on the surface to be coated, and a new color tone (gray and black) different from the color tone of each paint is applied. Mixed color) was formed. These coatings (gray, mixed color, black) and the color tone (white) of the surface to be coated were combined to provide a more colorful appearance. On the other hand, in the comparative example, the outline of each coating film was conspicuous and monotonous, and coating unevenness was conspicuous. From these results, under such spray coating conditions, the opacity of the coating film was 0.7 or less and the coating viscosity was Ford Cup No. Flow time in 4 methods is 8-18
Obviously, it needs to be seconds.

(Test Example 2) In this test example, the spot-like patterns of Examples 6 to 13 and Comparative Examples 3 to 5 obtained based on the coating specifications shown in Table 3 and the coating materials and coating conditions shown in Table 4 The finish of the coating film was evaluated. The surface to be coated in this test example is an intermediate coating, that is, a coating film of a white enamel fluororesin paint (the same as that used in Test Example 1). The paints A and B for pattern application used in Examples 6 to 13 and Comparative Examples 3 to 5 were two types of colored paints (the same paints as in Test Example 1 were used), respectively, manufactured by Suzuka Fine Co., Ltd. Rafton Fusso Clear was added to adjust the concealment rate to 0.7, and the viscosity was calculated by adding Rafton Fusso Thinner manufactured by Suzuka Fine Co., Ltd. to Ford Cup No. The flow time was adjusted to 8 seconds by the four methods. The thixotropy coefficient of the paint A and the paint B thus prepared is 1
Met. Paint A and paint B were applied simultaneously. The object to be coated and the coating machine used were the same as in Test Example 1.

[0025]

[Table 3]

[0026]

[Table 4]

As shown in Table 4, in Examples 6 to 13,
In each case, as in the case of Examples 1 to 5, a variety of uniform spot-like patterns with a variety of feelings were obtained. On the other hand, in Comparative Example 3, since the atomizing air pressure was 0.6 (kgf / cm ² ), the speckled coating film formed by painting was too fine and a good speckled pattern was not formed. . Also in Comparative Example 4, similarly, since the pattern pressure was as high as 0.6 (kgf / cm ² ), no good spot-like pattern was formed. Further, in Comparative Example 5,
Since the discharge rate of the coating material B was set to 350 ml / min, the coating material flowed on the surface to be coated, so that a uniform spotted pattern could not be formed. From these results, the condition of the spray coating machine was
^{0.1 ~0.5 (kgf / cm 2)} , patterns pressure ^{0.3 ~0.5 (kgf / cm 2)} ,
It is clear that a discharge amount of 100 to 300 (ml / min) is required.

(Test Example 3) In this test example, the spot-like coating films of Examples 14 to 16 obtained based on the coating specifications shown in Tables 5 and 6 and the following coating materials and coating conditions were used. Finishability was evaluated. The surface to be coated in Example 14 is the same as the surface to be coated in Examples 1 to 13, whereas the surface to be coated in Example 15 is a metallic fluororesin paint (Luffton fusso metallic manufactured by Suzuka Fine Co., Ltd.). ), And in Example 16, a stainless steel plate. Example 14
The paints A and B for pattern application used in Nos. 1 to 16 were two kinds of colored paints (the same paints as in Test Example 1 were used).
Was adjusted to an opacity of 0.7 by adding Luffton Fluoro Clear manufactured by Suzuka Fine Co., Ltd., and the viscosity was adjusted by adding Luffton Fluoro Thinner manufactured by Suzuka Fine Co., Ltd. The flow time was adjusted to 8 seconds by the flow-down time of the four methods. The thixotropy coefficient of the paint A and the paint B thus prepared was 1. Paint A and paint B were applied simultaneously. As the conditions of the spray coating machine, the atomizing air pressure was 0.2 (kgf / cm ² ), the pattern pressure was 0.4 (kgf / cm ² ), and the discharge amount was 150 (ml / min) for paint A. B was coated at 300 (ml / min). The object to be coated and the coating machine used were the same as in Test Example 1.

[0029]

[Table 5]

[0030]

[Table 6]

As shown in Table 5, in Example 14, similarly to Examples 1 to 13, a variety of uniform and colorful spot-like patterns were obtained. On the other hand, in Example 15, in addition to obtaining a variety of uniform and colorful spot-like patterns, this pattern looks different depending on how light hits and the viewing direction. Met. in addition,
In Example 15, since the metallic coating film on the surface to be coated was seen through, a glossy characteristic appearance was exhibited. In Example 16 as well, a variegated, variegated and uniform spot-like pattern was obtained, and at the same time, this pattern looked different depending on the degree of light hit and the viewing direction. Further, due to the color tone and gloss of the stainless steel as the surface to be coated, the appearance was different from that of Examples 1 to 13 and had a characteristic appearance.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichiro Yokogi 4-1-31 Koganehara, Matsudo-shi, Chiba

Claims (6)

[Claims] 1. A building material characterized in that a coating material having an opacity of a coating film of 0.7 or less is applied in spots on the surface to be coated of the building material. 2. A building material characterized in that two or more kinds of paints having an opacity of a coating film of 0.7 or less are applied to the surface of the building material to be coated in spots. 3. The building material according to claim 1, wherein
A building material, wherein the surface to be coated has a metallic tone. 4. The coating film has an opacity of 0.7 or less and a thixotropy coefficient of 5 rpm / 50 rpm as measured by a B-type rotational viscometer.
And the viscosity was Ford Cup No. 1. A coating method for a building material, wherein a paint having a flow-down time of 18 seconds or less according to Method 4 is applied using a spray gun in a state where the paint is not atomized or almost not atomized. 5. The method for coating a building material according to claim 4, wherein two or more kinds of said paints are used. 6. The method for coating a building material according to claim 5, wherein one paint and at least one other paint are coated so as to be mixed on a surface to be coated.