JPH06321657A - Satin decoration method for surface of ceramic building material - Google Patents

Abstract

PURPOSE:To easily and uniformly attain coating giving a satin surface. CONSTITUTION:The surface of an undercoated ceramic building material is coated with a clear coating material prepd. by adding 0.05-5% spherical beads having 0.2-1.0mm diameter. Since the spherical beads are added, a satin pattern is easily formed by the single coating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for applying a satin finish to a surface of a ceramic building material.

[0002]

2. Description of the Related Art Conventionally, an inorganic plate material formed of fiber reinforced cement or the like has been widely used as a wall plate. If this outer wall plate material is left as it is, the ground color is white gray ~
It has a problem that it is not suitable as a building material such as a roofing material or an exterior wall panel as it is because it has a black-gray achromatic color, poor design, and absorbs water. Therefore, conventionally, water-proof various colors have been used for surface decoration.

By the way, as the surface coating of the above-mentioned ceramic building materials, there are cases in which a decorative coating having a finely textured satin finish is applied to the coating surface. It has been practiced to spray colored silica sand before the paint is dried, remove excess colored silica sand with an air knife or the like, and then further apply clear coating to the surface. In addition, there are cases where a tile pattern or brickwork-like joint groove is provided as the surface pattern of the plate material, the colors of the joint groove and the convex surface between them are different, and the convex surface is a satin decorative surface. After coating the entire surface of the plate material including the joint groove with a single color, only the surface of the convex portion was coated with a roll coater or the like, and the above-mentioned makeup means was applied to the surface of the convex portion.

[0004]

[Problems of the prior art] However, in the above-mentioned coating means, the colored silica sand used for making the matte surface has many sharp sandy individual grains, which is uncomfortable to touch and rubs or nails the product surface There was a problem that the sand grains would easily fall off due to the impact of the. In addition, when painting the uneven pattern of tiles and brick joints, first coat the entire surface, then only the surface of the convex part and spray the sand particles while the paint is not drying to remove the sand particles that fell on the joint part. Further, in some cases, a complicated coating process such as clear coating only on the surface of the convex portion is required and there is a problem that productivity is extremely low.

However, in order to eliminate the troublesomeness caused by the above-mentioned sand particle spraying, it may be possible to apply a surface coating with a clear paint in which the sand particles are premixed. Since there is a large amount and the specific gravity is considerably larger than that of the paint, it is difficult to mix uniformly, and even if they are mixed, precipitation condensation occurs within an early stage, and it is difficult to form a uniform matte surface.

[0006]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a method for making a satin finish on a surface of a ceramic building material, which is capable of easily and uniformly achieving a coating on a satin finish. It was made for the purpose of doing.

[0007]

[Means for Solving the Problems] That is, according to the method for surface-finishing the surface of satin-finished building materials according to the present invention, a clear coating prepared by adding 0.05 to 5% of spherical beads having a particle size of 0.2 to 1.0 mm is applied as a base coating. It is characterized in that the surface of the ceramic-based building material is painted.

[0008]

As the clear paint used in the present invention, those which have been conventionally used are used, for example, acrylic urethane paint, acrylic silicone paint, fluororesin paint and the like. Particle size 0.2 to 1.0 mm in these clear paints
The reason for adding 0.05 to 5% of spherical beads is to create a satin pattern with these spherical beads. A particle size of 0.2 to 1.0 mm is sufficient if the particle size is smaller than 0.2 mm. This is because the surface becomes a smooth surface, and if it is larger than 1.0 mm, the diameter of the beads becomes too large with respect to the thickness of the coating film, and the beads easily fall off.

The reason why the beads have a spherical shape is to reduce friction between the particles when they are added to and mixed in the clear paint, to make the mixing uniform, and to prevent the beads from dropping due to rubbing with other objects after coating. Synthetic resin beads or glass beads are used as the material of the spherical beads, and a material having a small difference in specific gravity from these is used in order to improve uniform mixing with the clear paint. Then, the clear coating containing the spherical beads is applied to the surface of the target plate material and dried and cured, so that the satin pattern surface makeup is performed as it is.

[0010]

Embodiments of the present invention will be described below.

[Example 1] A fiber-reinforced cement plate measuring 25 cm in length and width was formed as a test plate and cured by curing. An acrylic resin paint was applied as a primer on the surface of the test plate at 100 g / m ² and dried and cured. Then the average particle size 0.5m on the surface
Acrylic urethane paint made by adding 0.05%, 2.0% and 5.0% of m acrylic resin beads as clear paint 1
It was applied at 40 g / m ² and dried and cured.

Example 2 Color coating was carried out in the same manner as in Example 1 except that glass beads were used as the spherical beads in Example 1.

Example 3 A wall board having a brick-like joint groove having a length of 45 cm, a width of 300 cm, a depth of 4 mm, and a width of 10 mm was molded and cured by curing. The surface was uniformly coated with a grayish white undercoat by a flow coater, and the paint was dried, and then the same clear paint as in Example 1 was applied by a roll coater only on the convex surface.

[Comparative Example 1] In Example 1, the diameter of beads added to the clear coating was 0.05 mm or less and 5.0 mm.
Decorative coating was carried out in the same manner as in Example 1 except that only the above were used. [Comparative Example 2] The same undercoating as in Example 3 was applied to the surface of the wallboard used in Example 3, and then the convex surface was coated only with the same clear paint as in Example 1 while the paint did not dry and harden. The silica sand was sprinkled on the surface, the silica sand that had fallen on the joints was removed and then cured, and finally clear coating was applied to the surface to obtain a satin-finished surface.

For the above-mentioned Examples 1 to 3 and Comparative Examples 1 and 2, the surface condition was observed and a sand particle drop-off test was conducted by rubbing the rubber block while pressing it at a contact pressure of 1.0 kg / cm ^2.
The results are shown in Table 2.

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

As described above, according to the present invention, when the surface satin finish is applied, the coating work can be completed by performing only one clear coating. Therefore, compared with the case where the conventional colored silica sand is used, the surface coating, The steps such as sand particle spraying, removal of excess sand particles, and clear coating can be completely omitted, resulting in significant omission. In addition, there is almost no drop of particles from the obtained satin-finished surface, and it is possible to obtain a durable matte-finished surface.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C04B 41/65

Claims (1)

[Claims] 1. A spherical bead having a particle size of 0.2 to 1.0 mm is used in an amount of 0.05.
A surface-finished surface-finishing method for ceramic-based building materials, characterized in that the surface of the ceramic-based building materials is coated with a clear paint containing 5% by weight of the coating.