JP4982109B2 - Decorative building material coating material and decorative building material using the decorative building material coating material - Google Patents

Description

The present invention relates to a decorative building material coating material and a decorative building material using the decorative building material coating material.

  Conventionally, as a coating material coated on a building base material, there is an aqueous coating material containing an acrylate ester / styrene copolymer, Portland cement, and silica sand as described in Patent Document 1. By coating this coating material on a base material such as a fragile polystyrene foam, a decorative building material having hardness, durability, and lightness is completed.

International Publication No. 05/019563 Pamphlet

However, since the coating material described in Patent Document 1 contains silica sand, drying of the coating material is extremely slow, workability is poor, and it takes time to produce building materials. In addition, the combined use of cement and silica sand inevitably increases the thickness of the coating, which not only increases the weight of the building material as a whole, but also when the coating is applied to a substrate that has been subjected to fine modeling, the modeling is not accurately reproduced. There was a problem.

  The present invention has been made in view of such conventional problems, and the object of the present invention is a decorative building material that is quick to dry, excellent in workability, and can accurately reproduce the modeling applied to the base material. It is providing the decorative coating material using the coating material for coatings, and the said coating material for decorative building materials.

The gist of the present invention is a decorative building material coating material to be coated on a building base material, wherein the coating material is the acrylic copolymer hollow fine powder, and an acrylic ester / styrene copolymer aqueous dispersion, Including an extender, a film-forming aid, a viscosity modifier, an additive comprising a plasticizer, and water, and the acrylic copolymer hollow fine powder and the extender pigment are 34.1% by weight; The aqueous dispersion of styrene copolymer and the film forming aid are 27.5 wt%, the viscosity modifier and the plasticizer are 6.0 wt%, and the water is 32.4 wt%. . Moreover, the decorative building material using the decorative building material coating material is a decorative building material in which a coating film of the decorative building material coating material is formed on the surface of the building base material, wherein the coating material is the acrylic copolymer hollow fine powder And an acrylic ester / styrene copolymer aqueous dispersion, an extender, an additive comprising a film forming aid, a viscosity modifier, a plasticizer, and water, and the acrylic copolymer hollow fine powder And 34.1% by weight of the extender pigment, 27.5% by weight of the acrylic ester / styrene copolymer aqueous dispersion and the film-forming aid, and 6.0% by weight of the viscosity modifier and the plasticizer. The water is 32.4% by weight.

  According to such a decorative building material coating material, since the decorative building material coating material contains acrylic copolymer hollow fine powder, the coating material can be reduced in weight and prevented from sagging. Drys quickly and improves the workability of painting. Moreover, since the coating film formed on the base material can be as thin as about 0.3 mm, the modeling applied to the base material can be accurately reproduced.

  In addition, by including acrylic copolymer hollow fine powder, it can reflect light and give a silky tone (smooth of plaster tone, translucent transparency due to light reflectivity). High-quality decorative building materials are completed.

  In addition, since it contains an acrylic ester / styrene copolymer aqueous dispersion, it has excellent adhesion and adhesiveness, so it is easy to mix acrylic copolymer hollow fine powder, and it can be applied to architectural substrates. Workability is improved.

  In addition, by including an aqueous dispersion of an acrylate / styrene copolymer, a decorative building material that is excellent in water resistance and stain resistance and can be easily removed even if dirt is attached thereto is obtained.

  Here, in the present specification, a building means a wide range including buildings such as houses and buildings, structures such as bridges, and the like. The decorative building material using the coating material for decorative building material of the present invention is used inside and outside these buildings, and the use of the decorative building material enhances the beauty of the building.

  By containing these additives and water, it contributes to the prevention of cracking of the coating film, further demonstration of water resistance and dirt resistance, and improvement of workability of coating.

  In addition, as a building base material, a polystyrene foam prepared in a predetermined shape, a polystyrene foam prepared in a predetermined shape, sprayed with a lacquer thinner and subjected to a roughening treatment, prepared in a predetermined shape It is possible to use a polystyrene foam coated with an aqueous coating material containing a sealer base mainly composed of an acrylate ester / styrene copolymer, Portland cement and silica sand.

  By forming the coating film of the coating material for decorative building material of the present invention on the surface of the polystyrene foam, the surface shape of the polystyrene foam is utilized as it is, and the decorative building material with a glossy and soft plaster-like expression is produced. .

  In addition, a lacquer-based thinner is sprayed on a polystyrene foam, and a crater-like surface roughening treatment is applied to form a coating film of the coating material for decorative building materials of the present invention. A unique texture is born, and a high-quality decorative building material like the Roman Palace is completed. Furthermore, according to the coating material for decorative building material of the present invention, it is possible to reproduce the fine modeling applied to the base material, so that it is possible to reproduce the rough surface as formed by spraying with thinner. It is.

In addition, the coating material for decorative building materials of the present invention is applied to the surface of a polystyrene foam coated with a water-based coating material containing a sealer base mainly composed of an acrylate ester / styrene copolymer, Portland cement and silica sand. By forming a film, it is possible to produce a decorative building material that is thin, lightweight, strong, and has a finely shaped cross-sectional shape with a reduced coating thickness.

  According to the decorative building material coating material of the present invention, since the decorative building material coating material includes the acrylic copolymer hollow fine powder, the coating material can be reduced in weight and prevented from sagging. Drys quickly and improves the workability of painting. Moreover, since the coating film formed on the base material can be as thin as about 0.3 mm, the modeling applied to the base material can be accurately reproduced.

In addition, by including acrylic copolymer hollow fine powder, it can reflect light and give a silky tone (smooth of plaster tone, translucent transparency due to light reflectivity). High-quality decorative building materials are completed. In addition, by including an aqueous dispersion of an acrylate / styrene copolymer, a decorative building material that is excellent in water resistance and stain resistance and can be easily removed even if dirt is attached thereto is obtained.

  The decorative building material coating material of the present invention is characterized by comprising an acrylic copolymer hollow fine powder and an acrylic ester / styrene copolymer aqueous dispersion. This decorative building material coating material is applied to the surface of the building base material by appropriately applying a method using a trowel, spatula, brush, or spraying method using a gun, etc., to form a coating film for the decorative building material coating material. Decorative building materials are used in buildings.

As the acrylic copolymer hollow fine powder to be used, those having an average particle diameter of 40 μm (optical measurement), a density of 0.3 g / cm ³ , and a spherical particle shape are preferably used. The particles of the hollow fine powder may be air bubbles.

  The acrylic copolymer hollow fine powder can be said to be the main component of the coating material for decorative building materials of the present invention, and is lightweight because it is hollow, thereby reducing the weight of the coating material and preventing sagging. Drying after painting on the material is quickened, improving the workability of painting. In addition, since the lightness of the coating material is most exhibited at a normal temperature of about 0 to 50 ° C., there is no problem if the coating is performed as usual, and the workability is also improved in this respect.

  In addition, by including a lightweight acrylic copolymer hollow fine powder, the coating film formed on the base material can be as thin as approximately 0.3 mm, so the fine modeling applied to the base material is accurately reproduced. can do.

  In addition, the acrylic copolymer hollow fine powder reflects light and gives a silky-like texture (smooth plaster-like, translucent transparency due to light reflectivity). An overflowing decorative building material is completed.

  Furthermore, since the acrylic copolymer hollow fine powder is hollow (air bubbles), it plays the physical role of the heat insulating function, and the coating film of the coating material for decorative building materials of the present invention is formed on the surface of the base material. The constructed building material also functions as a heat insulating material.

  Since the acrylic ester / styrene copolymer aqueous dispersion has the property of repelling water after drying, it is excellent in water resistance and stain resistance, and the coating material for decorative building materials of the present invention is applied to the base material. Similarly, the building material is excellent in water resistance and dirt resistance, and has a feature that it is easy to be removed even if dirt is attached. Further, in this embodiment, the adhesion of dirt can be further prevented by coating an antifouling material as a finishing material.

  In addition, since acrylic ester / styrene copolymer aqueous dispersions are excellent in adhesion and adhesiveness, it is easy to mix acrylic copolymer hollow fine powders, and it is easy to apply to architectural substrates. , Workability is improved.

  As described above, the coating material for decorative building materials of the present invention includes an acrylic copolymer hollow fine powder, an acrylic ester / styrene copolymer aqueous dispersion, and, if necessary, an extender pigment, An additive such as a film forming aid, a viscosity adjusting material, and a plasticizer may be mixed with water.

  The extender pigment contributes to prevention of cracks in the coating film, and also functions as an adhesion mediator between the resin-based material contained in the coating material and other materials.

  The film-forming aid has the function of forming a continuous film of acrylic copolymer water, and exhibits the water resistance and stain resistance of the acrylic ester / styrene copolymer aqueous dispersion more effectively. Is.

  The viscosity modifier is added for the purpose of adjusting the workability of coating according to the target substrate.

  The plasticizer is added for the purpose of imparting flexibility to the resin material contained in the decorative building material coating material and improving the adhesion to the base material and extender pigment.

  Water is added to improve the workability of painting and to stabilize the coating material for decorative building materials.

When an additive and water are mixed with the acrylic copolymer hollow fine powder and the acrylic ester / styrene copolymer aqueous dispersion, the amount of the acrylic copolymer hollow fine powder used is about 34.1 wt. %, The amount of acrylic ester / styrene copolymer aqueous dispersion used is about 27.5% by weight, the amount of additive used is about 6.0% by weight, and the amount of water used is about 32.4% by weight. % .

  Here, if the amount of the acrylic copolymer hollow fine powder is too large in the material composition of the coating material for decorative building materials, the adhesion of the coating film to the substrate becomes weak.

  On the other hand, if the amount of the acrylic copolymer hollow fine powder is too small, the amount of the adhering material increases, and the texture and light weight of the coating film, which are the characteristics of the present invention, are impaired.

  Moreover, when there is too much quantity of an acrylic ester / styrene copolymer aqueous dispersion, the viscosity of the mixed coating material for decorative building materials will become low. Moreover, the adhesive force of a coating material falls, and when it coats on the base material for construction, for example, a polystyrene foam, it flows down from a polystyrene foam and cannot coat required thickness. And it becomes soft overall, and it takes time to dry the coating material, and the curing is slowed down.

On the other hand, if the amount of the acrylic ester / styrene copolymer aqueous dispersion is too small, the viscosity of the entire coating material becomes high, and uniform coating on the building base material becomes impossible. In addition, the adhesive force between the components of the coating material is reduced, the coating material is not settled, the elasticity is lowered, and cracking and peeling are likely to occur.

  As a building base material on which the coating film of the coating material for decorative building materials of the present invention is formed, a polystyrene foam formed in a predetermined shape, a rough surface by spraying a lacquer thinner on a polystyrene foam formed in a predetermined shape What is formed by applying a water-based coating material containing a sealer base, Portland cement, and silica sand mainly composed of an acrylate ester / styrene copolymer to a polystyrene foam formed into a predetermined shape It is preferred to use.

  In particular, the coating material for decorative building materials of the present invention has excellent adhesion to polystyrene foam due to the adhesion performance of the acrylic ester / styrene copolymer aqueous dispersion, which makes the coating material easier to dry. It becomes a factor.

  By forming the coating film of the coating material for decorative building material of the present invention on the surface of the polystyrene foam, the surface shape of the polystyrene foam is utilized as it is, and the decorative building material with a glossy and soft plaster-like expression is produced. .

  In addition, by spraying a lacquer-based thinner on a polystyrene foam and subjecting it to a crater-like surface roughening treatment, the texture of the natural stone is formed by forming a coating film of the coating material for decorative building materials of the present invention on the surface. Was born, and a high-quality decorative building material like the Roman Palace was completed. Furthermore, according to the coating material for decorative building material of the present invention, it is possible to reproduce the fine modeling applied to the base material, so that it is possible to reproduce the rough surface as formed by spraying with thinner. It is.

  Water-based coating materials containing sealer base, Portland cement, and silica sand mainly composed of acrylic ester / styrene copolymer can be added with additives such as antifoaming agent, film-forming aid, viscosity modifier, etc. May be.

  As for each component of the water-based coating material, it is preferable that the amount of sealer base used is 18 to 40% by weight, the amount of Portland cement used is 2 to 10% by weight, and the amount of silica sand used is 80 to 50% by weight. Moreover, it is preferable that the usage-amount of an additive is 0.1 to 10 weight%.

  The water-based coating material has excellent adhesion to polystyrene foam due to the adhesion performance of the acrylic ester / styrene copolymer aqueous dispersion, and the surface of the brittle polystyrene foam can be strengthened. Furthermore, the practical value as a base material for construction increases.

  Accordingly, the coating material for decorative building materials of the present invention is applied to the surface of a polystyrene foam coated with a water-based coating material containing a sealer base mainly composed of an acrylate ester / styrene copolymer, Portland cement and silica sand. By forming a film, the thickness of the coating can be suppressed despite the repeated application of acrylic coating material, and it is thin, lightweight, strong, and shaped with a fine cross-sectional shape. You can create decorative building materials.

In addition, the building base material on which the coating film of the decorative building material coating material of the present invention is formed does not necessarily need to be made of polystyrene foam like the above-described three kinds of building base materials.

  Hereinafter, an example in the case of producing a decorative building material in which a coating film of the decorative building material coating material is formed by coating the coating material for decorative building material of the present invention on the surface of a building base material will be described.

  In this embodiment, three types of building base materials are prepared. In either case, first, the polystyrene foam is cut to form a predetermined shape. In order to form the polystyrene foam into a predetermined shape, it is convenient to use heat rays. The hot wire is obtained by energizing a wire having a high resistance such as a nichrome wire or a stainless steel / tungsten wire.

  The polystyrene foam can be easily cut by this heat ray and can be shaped. In finishing the shape, a cutter or a file may be used.

  The first building base material becomes the building base material with the polystyrene foam formed in a predetermined shape as it is.

The second building base material is obtained by spraying a lacquer thinner on the surface of a polystyrene foam formed in a predetermined shape and subjecting it to a roughening treatment. That is, the polystyrene foam in the portion sprayed with the thinner is dissolved and finished in a random worm-eaten crater-like surface. The thinner used in this example was HT-2500 lacquer thinner manufactured by Daishin Chemical Co., Ltd., and sprayed 6.0 to 7.0 cc per 1 m ² .

  The third building base material is a polystyrene foam formed in a predetermined shape, coated with a water-based coating material containing sealer base, Portland cement, and silica sand, the main component of which is an acrylate ester / styrene copolymer, A coating film of the aqueous coating material is formed on the surface.

  The aqueous coating material of this example was first prepared by 95% by weight of an aqueous emulsion of an acrylate / styrene copolymer, 0.95% by weight of a silicone-based antifoaming agent, and 0.25% by weight of a cellulose-based viscosity modifier. A sealer base mixed with 3.8% by weight of a film-forming auxiliary of texanol is prepared.

  Further, 27.4% by weight of this sealer base, 4.1% by weight of Portland cement and 68.5% by weight of silica sand are mixed to obtain the aqueous coating material of this example. At this time, water was added to adjust to a desired viscosity.

  The water-based coating material thus prepared was put into a lysing gun, and was coated on the surface of the previous polystyrene foam until the coating film became about 0.7 to 1.0 mm.

  When spray coating is performed using a lysing gun, it is preferable to spray at a substantially right angle with a distance of about 50 to 60 cm from the surface to be coated. Use a trowel, spatula, or brush if it is difficult to paint with a lysing gun or if it is easier to paint with a trowel, spatula, or brush. Thereafter, a top coat is applied and a finishing process is performed.

  The amount of water to be added varies depending on the coating method of this water-based coating material. That is, when the water-based coating material is applied using a ricin gun as in this embodiment, it is desirable that the viscosity be low, so that the amount of water to be added increases. On the other hand, when painting using a trowel, spatula, or brush, the viscosity may be somewhat high, so the amount of water added may be small. A viscosity modifier such as a thickener for adjusting the viscosity may be used as appropriate.

  The mixing ratio of these materials takes into consideration the temperature and humidity, the shape and size of the polystyrene foam, the installation location of the decorative building materials, etc., in addition to the difference in whether the painting method is lysing gun, iron, spatula, or brush. Fine adjustment is recommended.

  The component blending amount of the coating material is as described above, but if the amount of the sealer base is too large, the viscosity of the mixed coating material as a whole becomes low and watery. In addition, the adhesive force of the coating material becomes low, and when coated on a polystyrene foam, it flows down from the polystyrene foam, and the necessary thickness (0.7 to 1.0 mm) cannot be coated on the polystyrene foam. . And it becomes soft overall, and it takes time to dry the coating material, and the curing is slowed down.

  On the other hand, if the amount of the sealer base is too small, the viscosity of the mixed coating material as a whole becomes high and uniform coating on the polystyrene foam cannot be performed. In addition, the adhesive force between the components of the coating material is reduced, the coating material is not collected, the elastic force is weakened, and cracking and peeling are likely to occur.

  Moreover, when there is too much quantity of cement, drying of a coating material will accelerate | stimulate, hardening will begin during coating, and uniform coating will become impossible. In addition, it causes cracks after drying.

  On the other hand, if the amount of cement is too small, the curing power is weak, it takes time to dry the coating material, and sufficient hardness cannot be obtained.

  Moreover, when there is much quantity of silica sand, the whole coating material will be soft and it will become impossible to apply | coat uniformly to a polystyrene foam. Furthermore, the surface can be uneven and the surface cannot be evenly finished.

  On the other hand, if the amount of silica sand is small, sufficient hardness cannot be obtained and durability is lowered.

As described above, the surface of the fragile polystyrene foam is made stronger by coating the polystyrene foam with a water-based coating material containing a sealer base, Portland cement and silica sand mainly composed of acrylic ester / styrene copolymer. As a result, the practical value as an architectural base material is further increased.

  Thus, when the three types of building base materials are prepared, the decorative building material coating material is coated on the surface of each building base material.

The coating material for decorative building materials of this example is an acrylic copolymer hollow fine powder having an average particle (bubble) diameter of 40 μm, a density of 0.3 g / cm ³ , and a particle shape of a sphere (air bubble), Tancal Talclay (Nitto Flour Chemical Co., Ltd.) as extender pigment, A sealer (Kurioka Corporation) as viscosity dispersion of acrylic ester / styrene copolymer, viscosity modifier (thickener) KOTEGRADE (Asahi Denka Kogyo Co., Ltd.) was used as a plasticizer, and those manufactured by BASF Japan Ltd. were used as plasticizers.

These materials are 34.1% by weight of acrylic copolymer hollow fine powder and extender pigment, 27.5 % by weight of acrylic ester / styrene copolymer aqueous dispersion and film forming aid, A plasticizer is mixed at 6.0% by weight, and water is mixed at 32.4% by weight to obtain a coating material for decorative building materials.

  The produced decorative building material coating material is put into a lysing gun and sprayed onto the surface (excluding the mounting surface) of the above three types of building base materials. The lysing gun is preferably sprayed at a substantially right angle at a distance of about 50 to 60 cm from the surface to be coated.

  And spraying is performed twice on the surface to be coated until the coating film becomes about 0.3 mm. In addition, the thickness of the coating film of the building base material in which a water-based coating material containing a sealer base mainly composed of an acrylate ester / styrene copolymer on a polystyrene foam, Portland cement and silica sand is coated is 1 in total. 0.0 to 1.3 mm.

  If it is difficult to spray with a ricin gun, or if it is easier to apply with a trowel, spatula or brush, use a trowel, spatula or brush.

  Thereafter, when the surface is dried, a coating film of the decorative building material coating material is formed on the surface of the building base material. Further, an antifouling material (Yuton manufactured by Gengen Kagaku Kogyo Co., Ltd.) is coated on the coating film for finishing treatment. By coating the antifouling material, it becomes more difficult for dirt to adhere to the surface, and even if dirt adheres, it becomes easy to remove.

A coating material for decorative building materials of this example, a conventional cement, silica sand, and an aqueous coating material containing an acrylate ester / styrene copolymer, a base material having a surface area of 0.5 m ² (here, polystyrene foam) Use) to form a coating film of 1.0 to 1.3 mm for the decorative building material coating material of this example, and a coating film of 1.5 to 2.0 mm for the conventional aqueous coating material. It was formed by coating twice, and when the time until the coating material was dried and the coating film was formed was measured, the coating material for decorative building material of this example was 5.0 hours, and the conventional aqueous coating The material was 10.0 hours. This also shows that the workability of painting is improved by the decorative building material coating material of this example.

  A perspective view and a side view of the decorative building materials 1a to 1c thus manufactured are shown in FIGS. FIG. 1 shows a case in which a polystyrene foam 2a is used as a building base material, and a coating film is formed by coating the coating material 3a for decorative building material on the polystyrene foam 2a. When the surface is sprayed with a lacquer thinner and the surface is roughened, and a coating film is formed by coating the coating material 3b for decorative building material on the surface, FIG. An aqueous coating material 5 containing a sealer base, Portland cement, and silica sand mainly composed of an acrylate ester / styrene copolymer is coated on the polystyrene foam 2c, and a coating film of the aqueous coating material 5 is formed. In this case, the coating material 3c for decorative building material is further applied onto the coating film to form a coating film.

  The decorative building material 1a shown in FIG. 1A has the surface shape of the polystyrene foam 2a as it is, has no gloss, and has a soft expression of plaster.

  In addition, the decorative building material 1b in FIG. 1 (b) uses the crater-like rough surface formed by spraying lacquer thinner to create a natural stone texture, giving it a luxurious feel like a Roman palace. It will have.

  Moreover, although the decorative building material 1c of FIG.1 (c) has overcoated with the different kind of acrylic coating material, according to the coating material 3c for decorative building materials of a present Example, it is about 0.3 mm. Therefore, even if overcoating is performed on the aqueous coating material 5, the total thickness of the coating film is suppressed to 1.0 to 1.3 mm. Therefore, the decorative building material 1c is thin, lightweight, strong and practical, and has a fine cross-sectional shape. Moreover, by coating the coating material 3c for decorative building materials on the coating film of the water-based coating material 5, the coating material 3c for decorative building materials plays the role of a finishing agent, and becomes a decorative building material with a high-class feeling.

  In addition, these decorative building materials 1a to 1c are not only building materials that have a silky tone (smooth of stucco tone, translucent transparency due to light reflectivity), but also a lightweight, water-resistant It is excellent in dirt resistance and is a building material that is easy to remove even if dirt is attached.

  These decorative building materials 1a to 1c can be easily attached to a building by an adhesive. That is, since the decorative building materials 1a to 1c are made of polystyrene foam as a base material, the decorative building materials 1a to 1c can be easily attached to a building while maintaining sufficient strength with an adhesive. Various adhesives can be used as the adhesive, and in particular, a silicon-based adhesive, a polyvinyl acetate-based adhesive, and an epoxy-based resin adhesive can be preferably used.

  In this example, product number 9670 of trade name “Grip” (House Japan Co., Ltd.) was used as the adhesive.

  The manufactured decorative building materials can be used regardless of the inside or outside of the building, such as building arches, wife wall decorations, window frames, corner panels, moldings, dentiles, decorative columns, window sills, wooden boards, brackets, etc. . As the interior, it is used for decorations such as around the ceiling, molding for indirect lighting, decorative columns, windows and door frames. The exterior is used for molding of the outer wall, decoration around windows and doors, corner decoration, and the like, and the exterior is used for earthwork, gates, and other decorations.

  These are not the main structural materials of the building, but are just decorative materials, but they give the building an accent by adding beautiful accents to the building, giving it a glamorous, high-class feel and shadow, giving the building a sharpness. Therefore, it is suitable for various commercial facilities such as department stores, hotels, stores, wedding halls, amusement park / theme park attractions, etc.

In addition, since a lightweight polystyrene foam is used as the building material, it is safe even if the decorative building material falls from the building, and it is only necessary to attach it again with an adhesive, so that repair is easy.

It is the perspective view and side view which show one Example of the decorative building material using the coating material for decorative building materials of this invention. It is the perspective view and side view which show one Example of the decorative building material using the coating material for decorative building materials of this invention. It is the perspective view and side view which show one Example of the decorative building material using the coating material for decorative building materials of this invention.

Explanation of symbols

1: decorative building material 2: polystyrene foam 3: coating material for decorative building material 5: water-based coating material

Claims (5)

In decorative building material coating materials to be painted on building base materials,
The coating material comprises an additive comprising the acrylic copolymer hollow fine powder, an acrylic ester / styrene copolymer aqueous dispersion, an extender pigment, a film forming aid, a viscosity modifier, a plasticizer, and water. Including
The acrylic copolymer hollow fine powder and the extender pigment are 34.1% by weight, the acrylic ester / styrene copolymer aqueous dispersion and the film-forming aid are 27.5% by weight, the viscosity modifier, A coating material for decorative building materials, wherein the plasticizer is 6.0% by weight and the water is 32.4% by weight . In decorative building materials in which a coating film for decorative building materials is formed on the surface of a building base material,
The coating material comprises an additive comprising the acrylic copolymer hollow fine powder, an acrylic ester / styrene copolymer aqueous dispersion, an extender pigment, a film forming aid, a viscosity modifier, a plasticizer, and water. Including
The acrylic copolymer hollow fine powder and the extender pigment are 34.1% by weight, the acrylic ester / styrene copolymer aqueous dispersion and the film-forming aid are 27.5% by weight, the viscosity modifier, A decorative building material, wherein the plasticizer is 6.0% by weight and the water is 32.4% by weight . The decorative building material according to claim 2, wherein the building base material is a polystyrene foam formed in a predetermined shape. The decorative building material according to claim 2, wherein the architectural base material is formed by spraying a lacquer thinner to a polystyrene foam formed in a predetermined shape and subjecting it to a roughening treatment. The building base material is formed by coating a polystyrene foam prepared in a predetermined shape with a water-based coating material including a sealer base mainly composed of an acrylate ester / styrene copolymer, Portland cement, and silica sand. The decorative building material according to claim 2.

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