JP3888640B2 - Decorative coating materials and decorative building materials - Google Patents

Description

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

Conventionally, various decorative coating materials in which a colored aggregate or the like is blended into a binder have been proposed as surface decorative materials for buildings, civil engineering structures, and the like. As an example, Japanese Patent Laid-Open No. 11-130980 (Patent Document 1) discloses that a synthetic resin emulsion is 5 to 20 parts by weight in terms of solid content with respect to 100 parts by weight of an aggregate having a particle size of 0.05 to 5 mm. The containing composition is described. With the coating material of Patent Document 1, a finished appearance such as natural stone tone can be obtained.
On the other hand, recently, a coating material containing a colored aggregate having a relatively small particle diameter has been proposed. For example, JP 2001-3002 A (Patent Document 2) describes a coating material using a colored aggregate having an average particle size of 10 to 150 μm. Patent Document 2 describes that by adopting a colored aggregate having a relatively small particle size, various finished appearances of an old sand wall tone, in which fine particles are scattered, are described.

JP-A-11-130980 JP 2001-3002 A

  However, as described in Patent Document 2, simply reducing the particle size of the colored aggregate causes a problem that the coating film is likely to be cracked during the coating film formation stage or after the coating film formation. Further, according to the coating material of Patent Document 2, although it is possible to express a variety of feelings that are difficult to obtain with colored aggregates having a large particle size, the design tends to be artificial.

  This invention is made | formed in view of the above problems, and the 1st subject in this invention is obtaining the decorative coating material which can suppress generation | occurrence | production of the crack of a formed coating film. The second problem is to obtain a decorative coating material capable of expressing a natural variety with a subtle change in hue. Furthermore, such a decorative coating material is formed into a sheet shape to obtain a decorative building material having the same effect.

  As a result of intensive studies to achieve the above object, the present inventor has found that a plurality of kinds of scaly aggregates having different thicknesses in a decorative coating material containing a binder and a granular aggregate having an average particle diameter of 10 to 1000 μm. It was conceived to be blended under specific conditions, and further, the scaly aggregate used was one having transparency and / or light interference, and the present invention was completed.

That is, the present invention has the following characteristics.
1. Binder (A), granular aggregate (B) having an average particle diameter of 10 μm to 1000 μm, thin scaly aggregate (C) having an average particle diameter of 0.05 mm to 5 mm, an average thickness of 1 μm to less than 200 μm, and an average particle A thick scaly aggregate (D) having a diameter of 0.5 mm to 20 mm and an average thickness of 0.2 mm to 5 mm is an essential component.
The granular aggregate (B) is 100 to 2000 parts by weight, the thin scaly aggregate (C) is 1 to 500 parts by weight, and the thick scaly form is 100 parts by weight of the solid content of the binder (A). A decorative coating material comprising 1 to 500 parts by weight of an aggregate (D).
2. The thin scale-like aggregate (C) and / or the thick-type scale-like aggregate (D) includes a scale-like aggregate having transparency and / or optical interference. Decorative coating materials as described in 1.
3. The granular aggregate (B) includes a granular aggregate having transparency. Or 2. Decorative coating materials as described in 1.
4). 1 above. ~ 3. A decorative building material obtained by molding the decorative coating material according to any of the above into a sheet.

Above 1. According to the invention which concerns on this, the decorative coating material which can suppress the crack generation | occurrence | production of a coating film in a coating-film formation stage thru | or after coating-film formation is obtained.
2. According to the invention which concerns on this, the decorative coating material which can express the natural colorful feeling to which a hue changes delicately can be obtained. Moreover, a brightness | luminance feeling can also be provided to a formation coating film. Further, in the above 3. In the decorative coating material described in 1), an excellent textured coating film with appropriate transparency can be obtained. In particular, when a granular aggregate having transparency is included at a relatively high ratio, it is possible to express a design with a sense of transparency mainly based on white.
4. above. According to the invention according to 1. above. ~ 3. It is possible to obtain a decorative building material having the same effect as the above, and with this decorative building material, it is possible to exhibit more stable coating film performance.

  Hereinafter, the best mode for carrying out the present invention will be described.

  As the binder (A) in the coating material of the present invention (hereinafter also referred to as “component (A)”), a water-soluble resin, a water-dispersible resin, a solvent-soluble resin, a solvent-free resin, a non-water-dispersed resin, Various binders such as a powder resin, or a binder obtained by combining these can be used. These may have crosslinking reactivity. Moreover, the form of (A) component is not specifically limited, Either 1 liquid type and 2 liquid type may be sufficient. In the present invention, a water-soluble resin and / or a water-dispersible resin is particularly preferably used. Examples of usable resins include cellulose, polyvinyl alcohol, ethylene resin, vinyl acetate resin, polyester resin, alkyd resin, vinyl chloride resin, epoxy resin, silicone resin, acrylic resin, urethane resin, acrylic silicon resin, fluorine Examples thereof include resins and the like, and composites thereof.

  The glass transition temperature of (A) component can be set suitably, and is about -50-50 degreeC normally. When using a water-dispersible resin as the component (A), if the glass transition temperature is set to −50 to 30 ° C. (more preferably −40 to 10 ° C.), the amount of the film-forming aid and the like can be reduced. In addition, a low VOC (low volatile organic compound) coating material suitable for interior finishing can be obtained.

  The component (B) in the coating material of the present invention is a granular aggregate (hereinafter referred to as “component (B)”) having an average particle diameter of 10 μm or more and 1000 μm or less. As the component (B), at least one selected from natural aggregates such as natural stone and natural stone pulverized products, and artificial aggregates such as colored aggregates can be suitably used. Specifically, for example, marble, granite, serpentine, granite, fluorite, cryolite, feldspar, quartzite, quartz sand, and pulverized products thereof, ceramic pulverized product, ceramic pulverized product, glass pulverized product, glass beads, resin Examples thereof include pulverized products, resin beads, and metal particles. Furthermore, those with a color coating on these surfaces can also be used. Various colors can be expressed by using two or more of such components (B) in appropriate combination. In addition, (B) component in this invention has a shape different from the below-mentioned (C) component and (D) component.

  The average particle size of the component (B) is usually from 10 μm to 1000 μm, preferably from 20 μm to 500 μm, more preferably from 30 μm to 300 μm, and even more preferably from 30 μm to 200 μm. Even if this invention is a case where the aggregate of such a small particle diameter is used as (B) component, the crack of a coating film can fully be suppressed. In addition, the average particle diameter of (B) component is a value obtained by sieving using the metal net sieve prescribed | regulated to JISZ8801-1: 2000, and calculating the average value of the weight distribution.

  The component (B) is usually mixed at a ratio of 100 to 2000 parts by weight, preferably 200 to 1500 parts by weight, more preferably 300 to 1000 parts by weight with respect to 100 parts by weight of the solid content of the component (A). When the mixing ratio of the component (B) is within such a range, it is preferable in terms of design properties and crack prevention properties of the coating film.

  In this invention, the granular aggregate (henceforth "(B-1) component") which has transparency can be included as (B) component. By using such a component (B-1), it becomes easy to obtain a texture having an appropriate transparency in the formed coating film. As the component (B-1), those having a light transmittance of 3% or more (preferably 3 to 50%, more preferably 10 to 30%) are suitable. In addition, the light transmittance said here is the value of the total light transmittance by a turbidimeter. In this measurement, a sample of the component (B-1) is filled in a transparent glass cell having an inner thickness of 5 mm, and then gradually filled with water, after which bubbles in the cell are removed by vibration. However, a sample having a particle diameter of 0.5 to 1.0 mm is selected and used.

Specific examples of such a component (B-1) include feldspar, silica sand, silica stone, cryolite, and glass beads. Among these, cryogenic stone is particularly suitable in the present invention.
The mixing ratio of the component (B-1) is desirably 20% by weight or more (preferably 50% by weight or more, more preferably 80% by weight or more) with respect to the entire component (B). When the component (B-1) is contained at such a high ratio, it is possible to express a design with a sense of transparency mainly based on white.

  In addition to the above-described components, the present coating material further comprises a thin scaly aggregate (C) (hereinafter referred to as “component (C)”) having an average particle diameter of 0.05 mm to 5 mm and an average thickness of 1 μm to less than 200 μm, It is obtained by mixing thick scaly aggregates (D) (hereinafter referred to as “component (D)”) having an average particle diameter of 0.5 mm to 20 mm and an average thickness of 0.2 mm to 5 mm. In the present invention, by using such a component (C) and component (D) in combination, it is possible to sufficiently suppress the occurrence of cracks in the coating film during the coating film formation stage or after the coating film formation. Furthermore, the workability | operativity at the time of coating, the designability of a formed coating film, smoothness, etc. can also be improved.

The average particle size of the component (C) is from 0.05 mm to 5 mm, preferably from 0.1 mm to 3 mm, more preferably from 0.2 mm to 2 mm. The average thickness may be in the range of 1 μm or more and less than 200 μm, preferably 5 μm or more and 150 μm or less, more preferably 10 μm or more and 100 μm or less. The ratio of the average minor axis to the average major axis of the component (C) is usually about 1: 1 to 1: 5.
The ratio of the average particle diameter to the average thickness (average particle diameter / average thickness) in the component (C) is usually 2/1 to 200/1, preferably 5/1 to 150/1, more preferably 10/1 to 100. / 1.

(D) Although the average particle diameter of a component is 0.5 mm or more and 20 mm or less, Preferably it is 0.8 mm or more and 10 mm or less, More preferably, it is 1 mm or more and 5 mm or less. The average thickness may be in the range of 0.2 mm to 5 mm, preferably 0.3 mm to 3 mm, more preferably 0.4 mm to 2 mm. The ratio of the average minor axis to the average major axis of the component (D) is usually about 1: 1 to 1: 5.
The ratio of the average particle size and the average thickness (average particle size / average thickness) in component (D) is usually 2/1 to 200/1, preferably 3/1 to 100/1, more preferably 4/1 to 50. / 1.

  In addition, the average particle diameter of (C) component and (D) component is obtained by sieving using the metal net sieve prescribed | regulated to JISZ8801-1: 2000, and calculating the average value of the weight distribution. Value. The average thickness is an average value measured by a micrometer.

  In the present invention, it is desirable that the average thickness of the component (D) is larger than the average particle diameter of the component (B). By having such a relative relationship between the component (B) and the component (D), it is possible to suppress the occurrence of worm-eaten streaks and the like when applying a trowel and form a flat and uniform coating film. it can. That is, a coating material suitable for iron coating can be obtained. In particular, when the average thickness of the component (D) is larger than the particle diameter of the maximum particle of the component (B), such an effect is easily obtained stably.

  The material of the component (C) and the component (D) is not particularly limited. For example, mica, talc, plate-like kaolin, barium sulfate flake, alumina flake, glass flake, shell piece, metal piece or other inorganic piece, or rubber piece, Plastic pieces, wood pieces, etc. can be used. These may be provided with a colored coating or the like.

  In the present invention, by adopting a transparent component as the component (C) and / or the component (D), it is possible to express a natural variety that slightly changes the hue. Moreover, a brightness | luminance feeling can also be provided to a formation coating film. Such (C) component and (D) component should just have transparency in a scale-like thickness direction. Examples of the scale-like aggregate having transparency include natural mica, transparent glass flakes and transparent plastic pieces, and natural mica is particularly preferable. These may be colored as long as the transparency is not impaired.

  Further, by adopting a component having optical coherence as the component (C) and / or the component (D), it is possible to impart a colorful feeling and a brightness feeling to the formed coating film. As such components, various materials can be used as long as they have optical coherence. For example, fine unevenness is formed by a film piece in which two or more layers of resins having different refractive indexes are laminated, embossing, or the like. A film piece, a film piece to which a transparent sphere such as a glass sphere is fixed, or a film piece on which metal vapor deposition is applied can be used. Such a component may have both light interference and transparency.

  In the present invention, a high-quality design can be obtained particularly by using an aggregate having transparency and / or light interference as the component (C). In particular, when the component (B-1) is used as the granular aggregate, such an aggregate greatly contributes to the improvement of the design properties of the formed coating film.

  The component (C) is usually mixed at a ratio of 1 to 500 parts by weight, preferably 2 to 200 parts by weight, more preferably 5 to 100 parts by weight with respect to 100 parts by weight of the solid content of the component (A). Moreover, (D) component is mixed with the ratio of 1-500 weight part normally with respect to 100 weight part of solid content of (A) component, Preferably it is 2-200 weight part, More preferably, it is 5-100 weight part. If the mixing ratio of the component (C) and the component (D) is within such a range, the occurrence of cracks in the formed coating film can be sufficiently suppressed, and the workability at the time of coating and the design properties of the formed coating film, It is also suitable in terms of smoothness.

In the present invention, a sufficient crack preventing effect can be obtained by using the component (C) and the component (D) in combination. The reason for this is not clear, but is thought to be due to the following actions.
In the present invention, the component (C) is dispersed almost uniformly in the coating film and plays a role of increasing the strength of the formed coating film. On the other hand, the component (D) has a thickness of about 5 to 100% (preferably 10 to 90%) of the thickness of the coating film, and this is scattered in the coating film, so that at the time of coating film formation or after coating film formation. The effect of dispersing the stress in the resulting coating film works, and local stress concentration is prevented. Furthermore, the strength of the formed coating film is also increased by the component (D). By the synergistic action of the component (C) and the component (D) as described above, it is presumed that the occurrence of cracks in the coating film can be sufficiently suppressed in the present invention.

  The coating material of the present invention may contain a pearlescent pigment (E) (hereinafter referred to as “component (E)”). By blending such component (E), it is possible to enhance the brightness of the formed coating film. In particular, when the component (B-1) is included as the component (B), the effect becomes remarkable. Such a component (E) has a very thin scaly shape with a high refractive index (average thickness is usually 0.05 μm or more and less than 1 μm), and multi-reflects incident light to exhibit pearly luster. Specifically, as the component (E), a substrate such as muscovite, synthetic mica, silica flake, or glass flake coated with a metal or metal oxide can be used. Among these, as a metal contained in a metal or a metal oxide, titanium, iron, aluminum, zinc, tin, zirconium, cobalt, nickel, gold | metal | money, silver, etc. are mentioned.

  The average particle size of the component (E) is usually 1 μm to 600 μm (preferably 1 μm to 200 μm, more preferably 5 μm to 50 μm). In addition, the average particle diameter of (E) component is a value of the 50% particle diameter measured by the centrifugal sedimentation type particle size distribution measuring apparatus.

  (E) The mixing ratio of a component is 0.1-200 weight part normally with respect to 100 weight part of solid content of (A) component, Preferably it is 1-50 weight part.

  Although this invention coating material can be manufactured by mixing the said component uniformly by a well-known method, the other component which can be normally used for a coating material can also be mixed as needed. Examples of such components include coloring pigments, extender pigments, thickeners, film-forming aids, leveling agents, plasticizers, antifreezing agents, pH adjusters, diluents, antiseptics, antifungal agents, and algae. Agents, antibacterial agents, dispersants, antifoaming agents, ultraviolet absorbers, antioxidants, light stabilizers, fibers, catalysts, crosslinking agents and the like. Moreover, if it is in the range which does not impair the effect of this invention, the granular aggregate etc. whose average particle diameter exceeds 1 mm can also be mixed.

  The decorative coating material of the present invention can be used mainly as a surface decorative material for buildings, civil engineering structures and the like. Applicable base materials include, for example, gypsum board, plywood, concrete, mortar, porcelain tile, fiber-mixed cement board, cement calcium silicate board, slag cement pearlite board, asbestos cement board, ALC board, siding board, extrusion board , Steel plate, plastic plate and the like. The surface of these base materials may have been subjected to some surface treatment (for example, a sealer, a surfacer, a filler, a putty, etc.). There may be. When performing surface treatment with a sealer or the like, it is desirable to set the hue of the sealer to the same color as the decorative coating material.

As a coating method of the coating material of the present invention, a known method can be adopted. For example, trowel coating, spray coating, roller coating, brush coating, and the like are possible. In any method, the present invention can ensure good coating workability, and can prevent the scattering of aggregates during coating.
The thickness of the dried coating film is not particularly limited and can be set as appropriate, but is usually about 0.2 to 5 mm (preferably 0.5 to 4 mm, more preferably 0.8 to 4 mm). Even if this invention composition is a case where such thick coating is performed, the crack of a coating film can fully be suppressed.
At the time of coating, the viscosity of the coating material can be appropriately adjusted by diluting with water or the like. The dilution ratio is usually about 0 to 10% by weight. The solid content during coating is usually about 60 to 90% by weight (preferably 70 to 85% by weight).
The coating and drying of the coating material of the present invention may be usually performed at room temperature (about 5 to 40 ° C.). After coating, various uneven patterns can be formed by treating the coated surface with a roller, a trowel, a brush, a comb, a spatula or the like. When drying at room temperature, a cured coating film can usually be formed by providing a drying time of 24 hours or longer after application. In addition, drying of a coating material can also be performed under high temperature as needed.

After forming a coating film by the coating material of the present invention, a clear paint, a water repellent or the like can be applied as necessary. Among these, examples of the clear paint include acrylic resin-based paints, urethane resin-based paints, epoxy resin-based paints, acrylic silicon resin-based paints, and fluororesin-based paints. Such a clear paint can also adjust the degree of gloss by blending a matting agent or the like. Moreover, as long as the effect of this invention is not inhibited, coloring can also be given. As the water repellent, those having an alkoxysilane compound, a silicone resin or the like as a main component can be used.
As a method of applying such a clear paint or water repellent, a known method can be employed, and for example, spray coating, roller coating, brush coating, or the like can be employed.

  In the present invention, the decorative coating material can be formed into a sheet shape in advance. As a method for forming the decorative coating material of the present invention into a sheet shape, a known method may be adopted. For example, (i) a method of applying a decorative coating material to a support, or (ii) a decorative property A method of pouring a coating material into a mold and demolding after curing can be used. If necessary, a clear paint, a water repellent, or the like can be applied to the surface of the building material after molding.

  Examples of the support in the method (i) include woven fabric, non-woven fabric, ceramic paper, synthetic paper, glass cloth, mesh, gypsum board, plywood, slate plate, metal plate and the like. By using such a support, the strength and the like of the building material can be sufficiently ensured. When applying a decorative coating material to such a support, for example, a spray, a flow coater, a roll coater or the like can be used.

As the mold in (ii) above, for example, a mold made of silicon resin, urethane resin, or the like, or a mold provided with release paper can be used. When making the formwork side the building material surface, a desired uneven pattern can be given to the building material surface by adjusting the shape inside the formwork. In the case where the mold frame side is used as the building material back surface, the adhesiveness of the building material can be improved by forming irregularities on the back surface.
In the above (ii), a method using means such as a spray, a trowel, a reciprocator, or a coater can be employed instead of pouring. In addition, a support as described in (i) can be laminated. At the time of curing, heat treatment may be performed.

  The decorative building material as described above may be handled as a sheet-like molded body at the time of distribution, and may be applied to various base materials after being carried into a construction site such as a building or a civil engineering structure. What is necessary is just to stick to a base material using an adhesive agent, an adhesive, an adhesive tape, a nail, a collar, etc. when constructing a decorative building material. In addition, it can also be fixed using pins, fasteners, rails or the like. In the construction of decorative building materials, there are no problems such as scattering of materials by spray coating, etc., and it is excellent in terms of workability, and the coating film management is easy because it uses a pre-coated film at the factory. , Stable coating performance can be exhibited. The thickness of the decorative building material is not particularly limited, but is usually about 0.5 to 8 mm.

  Examples are given below to clarify the features of the present invention.

Example 1
Manufacture of coating material: 200 parts by weight of granular aggregate 1, 200 parts by weight of granular aggregate 2, 120 parts by weight of granular aggregate 2 and 80 parts by weight of granular aggregate 3 with respect to 200 parts by weight of water-dispersible resin (100 parts by weight of solid content) 15 parts by weight of aggregate-like aggregate 1, 20 parts by weight of thick scaly aggregate, 30 parts by weight of water, 8 parts by weight of film-forming aid, 1 part by weight of thickener, and 2 parts by weight of defoaming agent The mixture was mixed and stirred uniformly by a conventional method to produce a coating material. In addition, the raw material used for manufacture of a coating material is as follows.

Water-dispersible resin: acrylic resin emulsion (solid content 50%, glass transition temperature 20 ° C.)
・ Granular aggregate 1: colored quartz sand (brown, average particle size 70 μm)
・ Granular aggregate 2: colored silica sand (red, average particle diameter 100 μm)
・ Granular aggregate 3: colored silica sand (light yellow, average particle diameter 150 μm)
・ Granular aggregate 4: Cold water stone (white translucent, average particle diameter 180 μm, light transmittance 16%)
-Thin scaly aggregate 1: colored mica (black, average particle diameter 1.2 mm, average thickness 50 μm)
-Thin scaly aggregate 2: natural mica (colorless and transparent, average particle diameter 1.0 mm, average thickness 40 μm)
・ Thin scale-like aggregate 3: Optical interference film piece (average particle diameter 0.5 mm, average thickness 50 μm)
・ Thick scaly aggregate: shell pieces (white, average particle diameter 3 mm, average thickness 0.6 mm)
-Pearlescent pigment: Titanium oxide-coated mica (average particle size 30 μm)
-Film-forming aid: 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate-Thickener: Hydroxyethyl cellulose powder-Antifoaming agent: Silicone antifoaming agent (solid content 50% by weight)

Test Method The following test was performed on the coating material obtained by the above method.
(1) Crack resistance test by initial drying A test body obtained by spray-coating a coating material on a 300 × 150 × 6 mm slate plate with a dry coating thickness of 2 mm was immediately subjected to a wind speed of 3 m / s ± 10%. The test specimen was placed in parallel with the airflow, the specimen was taken out after 6 hours, and the presence or absence of cracks on the coating film surface was visually confirmed. In the evaluation, “◯” indicates that no crack was generated, “Δ” indicates that the crack was slightly generated, and “X” indicates that the crack was clearly generated. The coating and testing of the test specimens were all performed under standard conditions (temperature 23 ° C., relative humidity 50%).

(2) Warm / Cool Repeated Resistance Test After coating the coating material on a 300 × 150 × 6 mm slate plate so that the thickness of the dry coating film was 2 mm, a specimen was cured for 14 days in a standard state.
The prepared specimen was subjected to a total of 10 cycles of water-cooling (23 ° C.) 18 hours → −20 ° C. 3 hours → 80 ° C. 3 hours for 1 cycle, and whether or not cracks occurred on the coating surface. Was confirmed visually. In the evaluation, “◯” indicates that no crack was generated, “Δ” indicates that the crack was slightly generated, and “X” indicates that the crack was clearly generated.

Test results The test results are shown in Table 2. In Example 1, good results could be obtained.

(Example 2)
The test was performed in the same manner as in Example 1 except that the coating material shown in Table 1 was used. The test results are shown in Table 2. In Example 2, good results could be obtained.

(Example 3)
When a test specimen was prepared in the same manner as in Example 1 except that the composition shown in Table 1 was used as the coating material, a coating film having a natural and colorful feeling was formed. When the obtained test body was tested in the same manner as in Example 1, good results were obtained as shown in Table 2.

Example 4
A test specimen was prepared in the same manner as in Example 1 except that the composition shown in Table 1 was used as the coating material. The coating film had a slightly reddish white color tone and a sense of transparency and brightness. Formed. When the obtained test body was tested in the same manner as in Example 1, good results were obtained as shown in Table 2.

(Example 5)
A test specimen was prepared in the same manner as in Example 1 except that the composition shown in Table 1 was used as the coating material. The coating film had a slightly reddish white color tone and a sense of transparency and brightness. Formed. When the obtained test body was tested in the same manner as in Example 1, good results were obtained as shown in Table 2.

(Example 6)
A test specimen was prepared in the same manner as in Example 1 except that the composition shown in Table 1 was used as the coating material. The coating film had a slightly reddish white color tone and a sense of transparency and brightness. Formed. When the obtained test body was tested in the same manner as in Example 1, good results were obtained as shown in Table 2.

(Comparative Examples 1-3)
The test was performed in the same manner as in Example 1 except that the coating material shown in Table 1 was used. The test results are shown in Table 2. In Comparative Examples 1 to 3, the results were insufficient compared to the Examples.

(Example 7)
The coating material of Example 1 was poured into a mold (300 mm long × 300 mm wide × 2 mm deep) coated with a release agent, and smoothed using a trowel. Sheet-shaped molded body 1 was obtained by demolding after curing at 23 ° C. for 48 hours. Subsequently, when this sheet-like molded body 1 was attached to a 300 × 300 × 6 mm slate plate using an acrylic resin adhesive and subjected to the same heating and cooling resistance test as in Example 1, abnormalities such as cracks were found. I was not able to admit. Further, when a plurality of sheet-like molded bodies 1 were attached to the wall surface of the gypsum board base using an acrylic resin adhesive, a stable decorative wall surface was obtained.

Claims (4)

Binder (A), granular aggregate (B) having an average particle diameter of 10 μm to 1000 μm, thin scaly aggregate (C) having an average particle diameter of 0.05 mm to 5 mm, an average thickness of 1 μm to less than 200 μm, and an average particle A thick scaly aggregate (D) having a diameter of 0.5 mm to 20 mm and an average thickness of 0.2 mm to 5 mm is an essential component.
The granular aggregate (B) is 100 to 2000 parts by weight, the thin scaly aggregate (C) is 1 to 500 parts by weight, and the thick scaly form is 100 parts by weight of the solid content of the binder (A). A decorative coating material comprising 1 to 500 parts by weight of an aggregate (D).   2. The scaly aggregate having transparency and / or light interference is included as the thin scaly aggregate (C) and / or the thick scaly aggregate (D). Decorative paint.   The decorative coating material according to claim 1 or 2, wherein the granular aggregate (B) includes a granular aggregate having transparency.   The decorative building material obtained by shape | molding the decorative coating material in any one of Claims 1-3 in a sheet form.