JP2001259518A - Method for coating autoclaved lightweight concrete panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for coating an ALC(autoclaved lightweight concrete) panel which can efficiently form a coated surface without deteriorating the designability of an uneven pattern such as a split stone tone formed on the surface of the ALC panel, with the pattern left as it is. SOLUTION: In the method for coating an ALC panel in which the ALC panel with the uneven pattern formed on the surface is coated with a primer and a top coat while being allowed to stand vertically, a water base emulsion coating 10-100 dPa.s in viscosity is used as the primer and applied repeatedly while the amount of the applied primer at a time is adjusted to be 0.3-1.0 kg/m2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for efficiently painting a lightweight cellular concrete panel, and more particularly, to a method for painting a lightweight cellular concrete panel in a state where the panel is installed in a substantially vertical direction. The present invention relates to a method for coating a lightweight cellular concrete panel capable of efficiently forming a painted surface while keeping the design of the uneven pattern as it is, without impairing the design property of the uneven pattern formed on the panel.

[0002]

2. Description of the Related Art Since ALC panels are more porous than concrete, they are excellent in lightness and heat insulating properties. By utilizing these characteristics, construction materials such as building exterior walls, partition walls, floors and the like are utilized. Widely used as a material. Then, on the surface of the ALC panel, for example, a concavo-convex pattern such as a cracked stone pattern realizing a natural concavo-convex feeling is formed, and this is put to practical use. In addition, the ALC panel has a surface that is not smooth due to the cutting of the piano wire, that is, has an uneven surface, as compared to a metal panel or an extruded plate, and has a smooth surface due to pores of bubbles exposed on the surface. There are no irregularities and there are severe irregularities. Therefore, a large amount of aggregate is added to the undercoat for adjusting unevenness used in the ALC panel in order to prevent increase in the amount and drying after drying, and the ALC panel is built at a site or the like. In the case of applying afterwards, a large amount of such an undercoat is applied to fill the pores of the bubbles, thereby adjusting the unevenness. In the ALC panel coating method, if the ALC panel is painted in a state where it is installed almost vertically at the construction site, apply a large amount of undercoat paint to adjust the unevenness of the panel surface as described above. Therefore, the viscosity of the undercoat is set to 150 to 350 dPa. In general, it was used by adjusting the temperature to about s. In addition, in the case of an ALC panel having an uneven pattern on the surface, the unevenness and unevenness of the surface become more severe, so that the application amount of the undercoat paint for adjusting the undercoat is at least 2.0 to 3.0 kg.
/ M2. Note that A
At the time of painting the LC panel, a sealer for fabric coating is used in an amount of 0.1 to 0.2 kg / m 2 to prevent water absorption on the surface.
Although it may be applied with a coating amount of about, this sealer has no performance for adjusting the base, so even if a sealer is applied, it is not possible to reduce the application amount of the undercoat paint for post-coating Was. When applying the undercoating paint by hand with a roller, it is possible to uniformly apply the roller surface having a smooth surface while keeping the surface of the roller in contact with the pattern of the ALC panel having an uneven pattern formed on the surface. Not only, as a result, not only the thickness of the coating film becomes non-uniform, but also the design of the formed concavo-convex pattern is not impaired, and it is not possible to leave the pattern in its original state. When painting an ALC panel on a crowded site, it is usual to use a spray gun for painting. However, as described above, an ALC panel having a concavo-convex pattern on a surface in a state of being set up in a substantially vertical state has a height of 150 to 350 dPa. When the undercoat paint having a high viscosity and a high viscosity is spray-coated at a large coating amount of at least 2.0 to 3.0 kg / m2, a spray gun having a large nozzle diameter is used to increase the discharge amount of the paint. It is necessary to make it difficult to atomize the paint, and the finished surface is covered with large paint particles, resulting in a surface with a large uneven pattern with increased smoothness. However, there is a problem that the design of the ALC panel itself having the uneven pattern formed thereon is impaired. Here, in the case of using an undercoat paint in which the paint particles are as fine as possible, a spray gun having a small nozzle diameter must be used. There is a problem that the application area per contact becomes small, which results in deterioration of workability. In addition, as described above, when the undercoat paint is spray-applied at a large application amount of at least 2.0 to 3.0 Kg / m2, the coating film becomes extremely thick, so that it is formed on the surface of the ALC panel. The uneven pattern thus formed is covered with a thick coating film, so that it is impossible to form a painted surface with the uneven pattern left as it is, and there is a problem that the design of the ALC panel itself is impaired.

[0003]

SUMMARY OF THE INVENTION The present invention has been achieved as a result of studying to solve the problems in the prior art described above. Therefore, the object of the present invention is to
An ALC panel coating that can efficiently form a painted surface with this uneven pattern left as it is, without impairing the design of the uneven pattern formed on the surface of the ALC panel when painting while standing almost vertically It is to provide a method.

[0004]

In order to achieve the above object, a method of coating an ALC panel according to the present invention is a method for coating a lightweight cellular concrete panel having an uneven pattern on its surface in a substantially vertical direction. In the method of applying an undercoat paint and then applying an overcoat paint repeatedly, the undercoat paint has a viscosity of 10 to 100 dPa. s water-based emulsion paint, and the undercoat paint is applied in an amount of 0.
It is characterized by being applied a plurality of times so as to be 3 to 1.0 kg / m2. In the method for coating an ALC panel according to the present invention, the uneven pattern is a crushed stone pattern embodying a natural uneven feeling, and the solid content of the undercoat paint is 20 to 45% by weight. The total application amount of the undercoat paint is 0.8 to 2.0 kg / m 2, and the number of times of application of the undercoat paint is 2 to 3 times,
Applying the undercoat with a spray gun, and applying an amount of 0.05 to 0.6 kg /
m2 is a preferable condition, and by applying these conditions, a further excellent effect can be expected.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the method for coating an ALC panel according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side sectional view showing an example of an ALC panel having a concavo-convex pattern formed on a surface used in the present invention, and FIG.
3 is an enlarged side sectional view showing a state where an undercoat paint is applied to a portion of FIG. As shown in FIG. 1, an ALC panel 1 used in the present invention has an uneven pattern 2 such as a cracked stone pattern embodying a natural uneven feeling on the surface thereof. And
As shown in FIG. 2, a coating film 3 made of an undercoat is formed on the uneven pattern 2 with a uniform thickness. The undercoat paint used in the present invention is composed of an acrylic or urethane-based synthetic resin emulsion and has a viscosity of 10 to 10.
100 dPa. s, especially 20 to 70 dPa.s. and the viscosity is adjusted to be lower than that of the conventional ALC panel. In this way, the viscosity of the undercoat paint is 10
100 dPa. By setting the range of s, the undercoat paint tends to flow down, and it is difficult to form a coating film having a uniform film thickness, and the use of a spray gun having a large diameter makes it difficult for the paint to be atomized. It is possible to solve the problem that the undercoat paint is eliminated and to efficiently apply the undercoat paint. That is, the viscosity is 10 to 10
0 dPa. By using the water-based emulsion-type undercoating in the range of s, even when using a spray gun having a small nozzle diameter, it is possible to atomize the coating particles, and to follow the uneven pattern on the surface of the ALC panel. In addition, since the undercoat paint can be applied uniformly in a thin film state, it is possible to reduce the amount of application as compared with the prior art and to achieve a sufficient base adjustment that fills the pores of the bubbles. Furthermore, since the discharge amount of the undercoat paint from the spray gun can be increased, it is possible to paint efficiently on a wide area of the ALC panel used as a building material with excellent work efficiency. Therefore, it is possible to show the asperity pattern as it is without basically impairing the original design of the ALC panel having the asperity pattern formed on the surface. In addition, by making the undercoat paint a water-based emulsion, it is possible to increase the content of the aggregate for the purpose of increasing the amount and preventing fraying after drying, and to reduce the price of the undercoat paint itself, which requires a large amount of application. Not only can it be reduced, but it can also be effective against environmental problems such as VOCs (volatile organic compounds). The viscosity referred to here is a rotational type viscometer “VT-0” manufactured by Lyon Co., Ltd.
4 ". In the present invention, the undercoat paint is applied in an amount of 0.3 to 1.
0 kg / m 2 multiple times, preferably 2 to
It is characterized by being applied three times. That is, even if the viscosity of the undercoat paint is reduced as described above, the applied paint can be prevented from flowing down by applying the undercoat paint a plurality of times. However, when the amount of one application of the undercoat is less than 0.3 kg / m2, it is not possible to adjust unevenness or fill pores with the undercoat unless the number of times of application is increased. Economy is reduced, and conversely, the amount of one application is 1.0 kg
If it exceeds / m2, the undercoat paint tends to run off, and the design of the ALC panel to be coated is undesirably impaired. The solid content at the time of application of the undercoat paint is 20 to 45% by weight, especially 25 to 45% by weight in order to adjust unevenness by cutting the piano wire on the surface of the ALC panel and to maintain the filled state of bubbles exposed on the surface. Preferably, it is 40% by weight. That is, if the solid content at the time of application of the undercoat paint is less than 20% by weight, the coating loses its sharpness due to drying, resulting in poor air hole filling properties. Is good, but when applied with a spray gun, there is a tendency that the acute angle portion of the uneven pattern forming portion tends to be rounded, and it becomes a rounded pattern as it is, ALC
It is not preferable because the design of the panel is impaired.
In addition, the total application amount of the undercoat paint is 0.8 to 2.0 kg.
/ M2 is desirable, and if it is less than 0.8 kg / m2, irregularity adjustment and air hole filling of the ALC panel surface are insufficient, and if it exceeds 2.0 kg / m2, it is formed on the surface of the ALC panel. The design of the uneven pattern tends to be impaired. Thus, the viscosity of the undercoat paint is 10 to 10
0 dPa. s water-based emulsion paint, and applying the undercoat paint a plurality of times so that the amount of one coat is 0.3 to 1.0 kg / m 2, thereby forming an uneven pattern formed on the surface of the ALC panel. A coated surface with this uneven pattern left as it is can be efficiently and economically formed in a short time without impairing the properties. Then, after the undercoat is applied, an acrylic, urethane, silicone or fluorine-based overcoat is overlaid on the undercoat to obtain a target ALC panel coated product on site. By built-in painting, it can be finished efficiently. The coating amount of the top coat is sufficient to be about 0.05 to 0.6 kg / m 2. With such an application amount, the uneven pattern formed on the surface of the ALC panel can be formed without impairing the design. It is possible to form a painted surface while leaving as it is.

Further, the present invention may be applied to a case where a vertical standing paint is applied before a panel is erected or at a place other than a site such as a factory.

[0007]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples. [Example 1] Based on a water-based emulsion-type undercoat "Kikusui Funde" manufactured by Kikusui Chemicals Co., Ltd., its viscosity was 40 dPa. s was adjusted so as to prepare Undercoat A. On the other hand, an ALC panel having a split-stone pattern (uneven pattern) as shown in FIG. 1 formed on the surface is erected in a substantially vertical direction.
The undercoating A was applied a plurality of times in four coats using a pressure-feeding spray gun such that the amount of one coat was 0.6 kg / m2. However, in the second to fourth coatings, the coating did not flow down, and a good finished surface was obtained. The total application amount after the undercoating A was applied twice was 1.2 kg / m2. In this state, the adjustment of unevenness and the filling of air bubbles were sufficiently achieved. The product was the best in both finish and productivity. That is, the viscosity is 40 dPa. If an undercoat is used, it is applied to the ALC panel in 2
With only a single application, even with a smaller total application amount than before, it is possible to sufficiently achieve the base finish for the purpose of adjusting unevenness and filling the pores of the air bubbles, and to form the irregularities formed on the surface of the ALC panel. Thus, the painted surface with the concavo-convex pattern left as it was could be efficiently formed in a short time without deteriorating the design of the pattern. [Comparative Example 1] A water-based emulsion-type undercoat, "Kikusui Funde" manufactured by Kikusui Chemical Co., Ltd., having a viscosity of 5 dPa. Adjust to s
Undercoat B was prepared. Using this undercoat paint B, in the same manner as in Example 1, the undercoat paint B was applied a plurality of times in four coats so that the amount of one coat was 0.3 kg / m2. In any case, undercoating tends to run off in any case, and after the fourth coating,
A good finished surface was obtained for the first time. When the undercoat B is used, the total application amount after four coatings is 1.2K.
g / m2, and the target base finish could not be achieved unless the coating was performed four times with a single application amount of 0.3 kg / m2. Therefore, when the viscosity is 5 dPa. In Comparative Example 1 using the undercoat paint of Example s, the result was inferior in productivity to Example 1. [Comparative Example 2] A water-based emulsion-type undercoat, "Kikusui Funde" manufactured by Kikusui Chemical Co., Ltd., having a viscosity of 150 dPa. s was adjusted so that undercoat C was prepared. Using this undercoat paint C, as in Example 1, the undercoat paint C was applied a plurality of times in four coats so that the amount of one coat was 0.6 kg / m2. As a result, the first to fourth coats were obtained. In any case of coating, the finished surface is granulated due to poor fluidity of the coating, and not only the original design property of the ALC panel is hindered,
Poor filling of air bubbles and poor discharge from the spray gun required a long time for coating. Therefore,
The viscosity is 150 dPa. In Comparative Example 2 using the undercoat paint of Comparative Example 1, a coated surface in which the concavo-convex pattern formed on the surface of the ALC panel was left as it was could not be obtained, and the productivity was poor as compared with Example 1. Was.

[0008]

As described above, according to the method for coating an ALC panel of the present invention, the painted surface having the uneven pattern left as it is without impairing the design of the uneven pattern formed on the surface of the ALC panel. It can be formed efficiently and economically. That is, the viscosity of the undercoat paint is 10
100 dPa. s water-based emulsion paint, and this undercoat paint is applied in an amount of 0.3 to 1.0 kg / m 2.
By applying a plurality of times in such a manner, even if the total application amount is smaller than before, the painted surface which has left the uneven pattern as it is without impairing the design of the uneven pattern formed on the surface of the ALC panel Can be efficiently and economically formed in a short time in a state where the ALC panel is mounted almost vertically, that is, in a state where the ALC panel is built at the building site.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view showing an example of an ALC panel having a cracked pattern formed on a surface used in the present invention.

FIG. 2 is an enlarged side sectional view showing a state in which an undercoat paint is applied to a portion A in FIG. 1;

[Explanation of symbols]

 1 ALC panel 2 Uneven pattern 3 Coating (undercoat)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Kobayashi 2035 Shimoi-machi, Shioi-machi, Owariasahi-shi, Aichi Prefecture Onoda ALC Co., Ltd. F-term (reference) in ALC Corporation 4D075 AA01 AA59 AA86 AE03 CA47 CB21 DA07 DB12 EA13 EB22 EB38 EB42 EB52 EB56 4G028 FA01

Claims (7)

[Claims] 1. A method of applying an undercoat in a state where a lightweight cellular concrete panel having an uneven pattern formed on a surface thereof is erected in a substantially vertical direction, and then applying an overcoat, wherein the viscosity of the undercoat is reduced. 10-100
dPa. A method for coating a lightweight cellular concrete panel, comprising applying the undercoat paint a plurality of times using an aqueous emulsion paint of s such that the amount of one coat is 0.3 to 1.0 kg / m2. 2. The method for coating a lightweight cellular concrete panel according to claim 1, wherein the uneven pattern is a split stone pattern embodying a natural uneven feeling. 3. The method for coating a lightweight cellular concrete panel according to claim 1, wherein the solid content of the undercoat paint at the time of application is 20 to 45% by weight. 4. The total coating amount of the undercoat paint is from 0.8 to
4. A pressure of 2.0 kg / m <2>.
The method for coating a lightweight cellular concrete panel according to any one of the above. 5. The method for producing a lightweight cellular concrete composite corner panel according to claim 1, wherein the number of times of application of the undercoat paint is two to three times. 6. The method for producing a lightweight cellular concrete composite corner panel according to claim 1, wherein the undercoat paint is applied by a spray gun. 7. The coating amount of the top coating composition is 0.05 to
7. A pressure of 0.6 kg / m <2>.
The method for producing a lightweight cellular concrete composite corner panel according to any one of the above items. [0001]