JP2893045B2 - 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 film, two or more colors of a coating material having high transparency as a whole in terms of transparency, coloring, and hiding are combined. The paint is applied in a spotted manner so that a deeper transparency and texture can be obtained.

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.

The compositions A to C used have 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 this example, the color is different from the color of the composition A in the same weight range as the composition A. Therefore, in the present invention, the combination of one of the components corresponding to the composition A and one of the components of the composition B, or the combination of the three components A, B, and C as the optimum combination is used. I have.

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.

The compounding amount of the binder is about 5 to 20% of the total dry weight of the composition A or B based on the weight of the solid content. 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 that 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 and 15% or less. However,
The values given 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 material having a light transmittance of less than 1.5% has a low transparency, and 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. The upper limit of the light transmittance of the component c is set to 15% or less in order to obtain a hiding power in the entire composition. If the upper limit is larger than this, the color of the undercoat becomes transparent unless the use amount of the coating material is increased. Become.

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%. Such aggregates include, for example, feldspar, silica sand, silica stone, and cold water stone. However, the particle size of the aggregate which gives these transparent feelings is 0.1 m.
Those having a particle size of less than m are also used as white fillers in a range of 10 parts by weight or less.

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.

Other additives include, for example, a thickener, a low-temperature stabilizer, a film-forming aid, an anti-sagging agent, and a defoaming agent, and are used in an amount of up to 5%. 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 above-mentioned filler which did not give a transparent feeling of less than 0.1 mm, or a coloring material of less than 0.05 mm contained as bread may be contained in an amount of 10 parts by weight or less.

In the compositions A to C 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 are granite, marble and sandstone,
Combinations of colors and paints that do not naturally occur are also possible. The composition A and the composition B or the compositions A and B and C are usually used in different colors. At this time, a different color is referred to as a different color if it has the same hue but different lightness or saturation. 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.
Is applied to the entire surface of the substrate, and the compositions B and A or the compositions A and B are sparsely applied. As a method of ironing construction, there is a method of applying the composition A or the composition B over the entire surface and partially applying the composition B or the composition A. After these constructions and painting of composition A and B,
Rolling the top of the convex part of the pattern in a wet state with a roller or iron, or polishing it with a sander after drying, and / or applying a clear paint that forms a transparent film to impart gloss and weather resistance It is also possible to measure the improvement.

[0019]

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

Embodiment 1

The colored aggregates a1 are ocher, a2 is ocher, a3 is light gray, and a4 is light gray colored silica sand. 0
5 to 0.3 mm, a2 and a4 are 0.02 to 0.3 m
m (provided that the weight ratio of 0.05 to 0.3 mm is at 80%).

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. In the compositions A1, B1 and C1 having the above 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 resin is first applied to the base, and then the whole composition is applied with a spray gun for spraying the composition A1.
Subsequently, the compositions B1 and C1 were applied again to the composition A1 in a spotted pattern. Immediately after the coating, kerosene 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 almost yellowish gray as a whole, and the natural stone had the same finished feeling as that obtained by knocking and finishing rust-based granite. In particular, in the portion where the composition A1 is present in a spot-like manner, the color of the composition B1 or the composition C1 is seen through, and the composition B1 or the composition C1 is combined with the form that the other composition is seen through. The finish is close to natural stone.

Comparative Example 1

The same colored aggregates a1 to a4 as those used in Example 1 were used. The same cold water sand as that used in Example 1 was used, and the particle size range was 0.1 to 0.3 mm. The light transmittance of this aggregate was
When measured by the method described above, it was 6.5%.
Further, in the compositions D1 and D2 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. Was.

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

The coating film on which the clear paint layer was formed showed light yellow and light gray spots as a whole, but had a small transparency and only a light depth was obtained.

In the second embodiment, a pattern having a color tone different from that of the first embodiment was created. First, compositions A2, B2, C2 (=
C1) Formulation examples are shown below.

The colored aggregate a5 is a black coal particle,
The particle size range is 0.2 to 2.0 mm, and a6 is a3, a4
A7 is yellow sand, a8 and a9 are light brown colored silica sand, and the particle size ranges of a6 and a7 are 0.1-1.0 mm, and a8 is 0.05-0.
3 mm, a9 is 0.02 to 0.3 mm (however, 0.05
０．３0.3 mm weight percentage at 80%). 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 A2, B2 and C2 (= C1) having the above-mentioned composition contained 14 parts by weight with respect to 100 parts by weight of the dry film when including the water in the synthetic resin emulsion. .

In the construction test of Example 2, as in Example 1, a primer was applied to an asbestos cement board, and then three compositions, A2, B2 and C2, 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, it was polished with a sander so as to obtain a polished surface, and a clear paint of acrylic silicone resin was spray-coated thereon.

The coating on which the clear paint layer was formed was almost pinkish-gray as a whole, and the natural stone had a finish similar to that of a polished pink granite.

[0033]

According to the present invention, it is possible to obtain a natural stone having a highly transparent portion, for example, a finish similar to the appearance and texture of granite, marble and the like.

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
Aggregate having parts by weight and a particle size of 0.1 to 5.0 mm, and having a total light transmittance of 1.5% or more and 15% or less at a sample thickness of 1 cm filled with water and giving transparency. : A composition A comprising 55 parts by weight or more of c, and a composition B to a composition A having a different color from the composition A in the same weight range, and a composition C having a different color from the composition B. A plurality of coating materials , characterized in that: 2. A coating method characterized by spray-coating the composition A and the composition B or the composition C according to claim 1 or simultaneously coating them in spots. 3. A coating obtained by the method according to claim 2.