JP2893044B2 - Multiple coating materials and coatings obtained using them - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel coating material used for forming a natural stone pattern having a deep and transparent feeling such as marble or granite on the ground of buildings, furniture, and ornaments, and uses the same. The present invention relates to a coating method and a film obtained by coating.

[0002]

2. Description of the Related Art Various types of pseudo-natural stone materials having a unique texture and depth of natural stone have been proposed for buildings, furniture, ornaments, and materials constituting them. For example,
In Japanese Patent Publication No. 2-40702, a natural stone pattern is formed by mixing an aggregate having a specific value of light transmittance at a specific ratio. Further, Japanese Patent Publication No. Hei 5-9587 is characterized in that finishing materials having different aggregate colors are applied in a non-mixed and multicolored form by a multi-head spray gun.

[0003]

However, in the former invention, a large feeling of the depth of the obtained film cannot be obtained, and in the latter invention, the mixing and non-mixing of colors by the finishing materials of a plurality of colors are not possible. Although there was some ingenuity, the depth was not considered at all.

[0004]

According to the present invention, when the coating composition has a thickness as a coating film, the coating composition having high transparency as a whole and a low transparency as a whole in terms of transparency, coloring and hiding properties, and color development. Are applied in a spot-like manner to obtain a deeper transparency and texture than ever before.

Next, the composition used in the present invention will be described. In the present invention, a composition called a finish coating material is used in at least two colors. Further, a combination of three or more colors is technically possible, but if four or more colors are used, the work becomes complicated, and two or three colors can be implemented without any practical problem.

[0006] The composition A of one color to be used
Has the following three components as main components. The component a is a coloring material having a particle size of 0.05 to 5.0 mm, the component b is a binder that forms a substantially colorless and transparent film when dried, and the component c is a binder. It has a particle size of 0.1-5.0 mm and has a total light transmittance of 1. cm at a sample thickness of 1 cm filled with water.
It is a relatively transparent aggregate that is more than 5%.

In composition A, the three components are less than 15 parts by weight, b is 5 to 20 parts by weight, and c is 55 parts by weight or more in a dry weight ratio. Another composition B
In the above, a is 55 parts by weight or more, b is 5 to 20 parts by weight, and c is less than 20 parts by weight. Therefore, in the present invention, an optimal combination is to combine one of the components corresponding to the composition A and one of the components of the composition B, or to combine one of them using two and one of the other. .

As the coloring material to be used as the component a, there are usually used coloring materials such as crushed granules of natural stones such as Hanaoka rock, serpentine, marble, obsidian and fluorite, and artificially colored sands such as crushed ceramics and colored silica sand. Good. In addition to these, natural stones and artificial aggregates having a light transmittance defined as the component c of less than 1.5% correspond to the coloring material. However, pigments have extremely high hiding power because they are extremely fine particles compared to natural rock-forming materials.
Therefore, the irradiation light hardly enters the inside of the coating layer, and most of the light is reflected on the surface. The particle size of the coloring material is selected according to the natural stone pattern to be formed.
What is necessary is just to be in the range of 5 to 5.0 mm. If it is too fine, problems similar to those of the pigment occur, and if it is too large, the application becomes difficult and the formed coating layer becomes unnatural. In addition, it is more preferable that not only one kind of coloring material but also a combination of a plurality of coloring materials be used, because the coloring material is not flat.

As the binder as the component (b), any binder used in this field may be used as long as it forms a substantially colorless and transparent film upon drying. However, when it is used outdoors, it must be excellent in water resistance and weather resistance. Specific examples thereof include, for example, acrylate-styrene copolymer, acrylate copolymer,
Synthetic resin solution or emulsion such as ethylene-vinyl acetate copolymer, vinyl acetate-veova copolymer and terpolymer thereof, for example, reaction-curable synthetic resin solution or emulsion such as epoxy resin, urethane resin and acrylic resin Examples thereof include a solution of an inorganic polymer compound such as water glass, colloidal silica, and lithium silicate.

[0010] The compounding amount of the binder is about 5 to 20% by weight of the solid content of the total dry weight of the composition A or B. If it is less than 5%, cracks tend to occur in the formed coating layer, and if it exceeds 20%, drying takes a long time and the cost is high.

It is necessary that the aggregate which gives a sense of transparency to be the component c has physical properties such as a particle size of 0.1 to 5.0 mm and a light transmittance of 1.5% or more. However, the values shown here are measured values obtained by the following measurement methods, and a slightly different value will be obtained when measuring based on other measurement methods or measuring instruments.

The light transmittance is measured using an integrating sphere light transmittance measuring device, and the measured sample has a particle size of 0.5 to 1.
Those having a diameter of 0 mm are selected, and the total light transmittance is measured in a state where the bread on the surface of the aggregate particles is removed by washing with water and the glass cells are filled together with water in a glass cell having an inner thickness of 10 mm. When there is no 0.5 to 1.0 mm particle in the composition, which is the object to be measured, measure a particle having the same composition or particle size within the specified range of the same locality, or pulverize and coarsen fine particles. In the case of particles, it is estimated from a graph of a change in light transmittance due to a change in particle diameter.

A composition having a light transmittance of less than 1.5% has a small transparency, can be regarded as a coloring material, and the color of the aggregate appears directly on the surface. Is the element of the color given as visual perception. Further, the upper limit of the light transmittance is estimated to be around 30% since even glass beads considered to be transparent in the state of a plate are 24% for particles having a particle size of 0.71 to 0.99 mm.

When the particle size is less than 0.1 mm, the transparency of the aggregate is lost, and when the particle size exceeds 5.0 mm, it becomes difficult to apply a composition containing the same, and it causes unevenness in design, Both should be avoided. Particularly preferred aggregates have a light transmittance of 4 to 25%. Examples of such aggregates include feldspar, silica sand, silica stone, cold water stone, and glass beads. However, these aggregates having a particle size of less than 0.1 mm that give a sense of transparency are also used as white fillers in the range of not more than 20 parts by weight in the composition A and not more than 10 parts by weight in the composition B. You.

The composition A is required to contain less than 15 parts by weight, 5 to 20 parts by weight, and 55 parts by weight or more of the above detailed components a, b, and c. The aggregate that gives the feeling and the binder that forms a substantially colorless and transparent film when dried will cause the composition A to form a transparent and deep part. Further, the composition B comprises
The components of a, b and c are not less than 55 parts by weight, 5 to 20 parts by weight,
By containing less than 20 parts by weight, the color of the coloring material is visually appealed, though there is almost no transparency.

Other additives include, for example, thickeners, low-temperature stabilizers, film-forming auxiliaries, anti-sagging agents, defoamers, and the like. Used within range. Further, the coating material composition of the present invention necessarily contains water, a solvent, and the like for imparting appropriate fluidity during construction in a state having fluidity before construction. In addition, the filler described above which did not give a feeling of transparency of less than 0.1 mm, or the coloring material of less than 0.05 mm contained as bread in the total amount is the numerical value described in the section of the c component. , 20 parts by weight (composition A), or 10 parts by weight (composition B).

In the composition A or the composition B of the present invention, the type of the component a and the component c, the particle size range, the combination of the colors, the amount and the like are appropriately selected according to the intended pattern of the natural stone. Examples of natural stones include granite and marble, but combinations of colors that do not naturally occur and combinations of paints are also possible. The composition A and the composition B are usually used in one color and one color or one color in two colors. Combinations beyond that are possible, but construction is complicated and not practical.

The application of the coating material of the present invention is mainly performed by spraying, and rarely by ironing. In the case of spraying, the simplest method is a single coating with a multi-head spray gun disclosed in Japanese Patent Publication No. 9587/95.
In this method, a coating is obtained by putting the composition A and the composition B into separate tanks of a spray gun and applying the same to the base material in spots from separate nozzles. When a multi-head spray gun is not used, a spray gun having only one tank and nozzle is used, and composition A or composition B,
Usually, the composition B is entirely coated on the substrate, and the composition A,
The above B or the compositions B and A are sparsely applied. As a method of ironing construction, there is a method in which the composition B is entirely applied and the composition A is partially applied. After the application of these compositions and the application of the compositions A and B, the tops of the convex portions of the pattern are wet-pressed with a roller or iron, or polished with a sander after drying, and / or a transparent film is formed. In some cases, clear paint is applied to impart gloss and improve weather resistance.

[0019]

EXAMPLES Next, the practice of the present invention will be described with reference to formulation examples and coating examples of the compositions A and B, but the present invention is not limited to these examples.

Embodiment 1

The colored aggregates a1 are light gray, a2 is yellow, a3 is black, a4 is black silica sand, and the particle size ranges of a1 and a2 are 0.1 to 0.1.
1.0 mm, a3 is 0.05 to 0.5 mm, a4 is 0.
02 to 0.3 mm (provided that the weight ratio of 0.05 to 0.3 mm is 80%). The coloring material a5 is black coal particles, and the particle size range is 0.2 to 2.0 m.
m.

The cold water sand had a particle size range of 0.1 to 0.3 mm, and the light transmittance of the aggregate was 6.5% when measured by the method described above. Further, in the compositions A1, A2 and B1 having the above-mentioned composition, the water and the solvent in the slurry state before the application include 16 parts by weight with respect to 100 parts by weight of the dry film when including the water in the synthetic resin emulsion. Met.

The construction test of Example 1 was performed on several asbestos cement board bases. A primer of vinylidene chloride-based resin is first applied to the base, and then the whole surface of the primer is applied with a spray gun for spraying the composition B1,
Subsequently, the compositions A1 and A2 were applied again to the composition B1 in a spotted pattern. Immediately after coating, a thinner for coating was applied to a plastic roller on one of the coated plates, and only the top of the pattern was pressed so that the entire surface was not flat.
After the coating was dried, a urethane resin clear paint was spray applied.

The coating on which the clear paint layer was formed was approximately white and black spots as a whole, and the natural stone had the same finished feeling as that obtained by knocking and finishing white granite. In particular, in the portion where the compositions A1 and A2 are present in a spot-like manner, the color of the composition B1 is seen through,
The finish is closer to natural stone.

In Example 2, contrary to Example 1, a pattern having a portion with high transparency was formed as a whole. First, examples of the compositions A3, B2, and B3 are shown below.

Embodiment 2

The colored aggregates a6 and a7 are light brown, a8, a9 and a10 are brown, a11 and a1
2 is silica sand colored in black, and the particle size range of each is a8: 0.1 to 1.0 mm, a6, a9 and a1.
1 is 0.05 to 0.5 mm, a7, a10 and a12
0.02 to 0.3 mm (however, 0.05 to 0.3 m
m is 80% by weight). The cold water sand was in the particle size range of 0.1 to 0.3 mm, and the light transmittance of this aggregate was 4.8%. The water and the solvent in the compositions A3, B2 and B3 having the above-mentioned composition, when including the water in the synthetic resin emulsion, contained 14 parts by weight with respect to 100 parts by weight of the dry film.

In the construction test of Example 2, as in Example 1, a primer was applied to an asbestos cement board, and then three compositions, A3, B2 and B3, were simultaneously coated using a three-head gun. One of the painted plates was subjected to a pressing process until the entire surface became almost flat while applying a paint thinner to a plastic roller. Further, after drying, the surface was polished with a sander so as to obtain a polished surface, and a clear paint of an acrylic silicone resin was spray-coated thereon.

The coating on which the clear paint layer was formed was approximately brown as a whole, and the natural stone had a finish similar to that obtained by polishing and finishing reddish granite.

Comparative Example 1

The same colored aggregates a6 to a10 as those used in Example 2 were used. The same cold water sand as that used in Example 2 was used, and the particle size range was 0.1 to 0.3 mm. The light transmittance of this aggregate was measured by the method described above. 4.8%. Further, in the compositions D1 and S2 of the above composition, the water and the solvent in the slurry state before the execution were:
When the water in the synthetic resin emulsion is included, the dry film 10
It contained 16 parts by weight with respect to 0 parts by weight.

In the construction test of Comparative Example 1, the same base as that of Example 2 was used, and the same primer coating was performed. Composition D
1 and D2 were simultaneously applied in a spotted pattern by a double-headed gun. After the coating, a pressing treatment and a top coat with a clear coating were applied in the same manner as in Example 2.

The coating on which the clear paint layer was formed had light green and light brown spots as a whole, but the contrast between the two colors was unclear, and there was no portion with high transparency. I couldn't get something deep.

[0034]

According to the present invention, it is possible to obtain natural stone having a highly transparent portion, such as granite, granite porphyry, marble, etc., in a finish similar in appearance and texture.

Claims (3)

(57) [Claims] 1. A dry weight of 0.05 to 5.0 m
Coloring material having a particle size of m: less than 15 parts by weight of a, binder which forms a substantially colorless and transparent film when dried: b of 5 to 20
A transparent aggregate having a particle weight of 0.1 to 5.0 mm, a total light transmittance of 1.5% or more at a sample thickness of 1 cm filled with water and a sample thickness of 1 cm: c. 5
A composition A consisting of 5 parts by weight or more, a in a dry weight of 55 parts by weight or more, b 5 to 20 parts by weight and c
A plurality of coating materials, wherein the composition B comprises less than 20 parts by weight. 2. A coating method, characterized by spray-coating the composition A and the composition B according to claim 1 or simultaneously coating them in spots. 3. A coating obtained by the method according to claim 2.