JP2793863B2 - How to paint uneven patterns - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a method for coating a concavo-convex pattern, and more specifically, to apply a pattern having three-dimensional concavities and convexities when painting the interior and exterior surfaces of a building. It is about the method.

[Conventional technology]

As a method of forming a concavo-convex pattern on a painted surface, there is a method of using an emulsion paint containing a filler or an aggregate.
Further, as a method of forming a multicolor pattern on a painted surface, there is a method of successively applying paints of a plurality of colors by brush coating, spray coating or the like. Therefore, in order to form a multicolor and uneven pattern, a plurality of paints and a paint for forming unevenness are sequentially applied.

However, in the above method, there is trouble to repeat the coating process by the number of colors of the paint, and it is necessary to apply the upper layer after the lower coated surface is dried, so that the work efficiency is extremely poor and the construction cost is high. Was.

Therefore, a method of forming a multicolored and uneven pattern in a single coating step has been proposed.
There is a method disclosed in JP-A-633.

This method uses a multi-color paint that has been blended with a convex spray material and is adjusted to a high viscosity so that it does not mix easily, and the interior of the paint gun is partitioned by a partition plate, and the paints are mixed with each other. By spraying simultaneously from the coating gun while avoiding this, the paints of a plurality of colors are separately applied without being mixed with each other, and an uneven pattern is formed since the paint includes a sprayed material having a convex pattern.

[Problems to be solved by the invention]

In the above prior art, it is necessary to adjust the paint to a high viscosity in order to prevent the paints of a plurality of colors from being mixed with each other. However, when coating is performed using a high-viscosity paint, there is a problem that it is extremely difficult to form a fine pattern. In addition, in the case of high-viscosity paint, coating unevenness is likely to occur, and it is difficult to form a uniform pattern over the entire coated surface. To form a uniform pattern, it is necessary to accurately maintain the operating speed of the coating gun. There was a drawback that painting work was difficult and required skill. Further, in the case of forming a color portion that becomes a pattern partially in the color to be painted over the entire painted surface, that is, the base coat color, the above-mentioned prior art painting method uses a large area base coat color with a high viscosity. Since it is extremely difficult to apply a uniform paint, it is necessary to apply a base coat color in advance using a normal coating method, and then apply only the color portion serving as a pattern using the above-described prior art coating method. Painting process is required, which is extremely troublesome.

Further, in the above-mentioned prior art coating method, a convex pattern spraying material is blended with the paint to form the uneven pattern,
It is difficult to apply a paint containing a large amount of such a filler. The uneven pattern that can be formed by this method is a relatively simple uneven pattern called “yuzuhada finish”, “moon surface finish”, etc., and the distribution of a plurality of colors is such that fine point-like color portions are distributed all over the surface. However, the design was unsatisfactory in terms of design.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to use a general-purpose paint without using a special paint such as a high-viscosity paint or a special filler-containing paint. It is another object of the present invention to provide a method for coating a concave and convex pattern, which can be freely selected and combined in a color, can form a complicated and highly decorative concave and convex pattern, and can easily perform a coating operation.

[Means for solving the problem]

According to the coating method of the present invention, which solves the above-mentioned problems, colored paints having one or more different solubility parameters are simultaneously sprayed from separate spray ports, and a part of the paints is mixed in a spray state to perform coating.

As the paint used in the present invention, an ordinary paint in which a color pigment of a necessary color is dispersed in an appropriate dispersion medium can be used.

Specific coloring pigments include inorganic pigments such as titanium oxide, carbon black, cadmium red, red iron oxide, molybdenum red, iron oxide, cadmium yellow, graphite, ultramarine, navy blue, and the like.
Alternatively, organic pigments such as azo pigments, nitro pigments, lake pigments and phthalocyanine pigments can be used. By dispersing these pigments in various dispersion media, ordinary paints such as oil-based, lacquer-based, phthalic-acid-based, acrylic-based, PVC-based, emulsion-based, and urethane-based paints can be prepared.
In addition, along with the coloring pigment described above, as an extender pigment,
In some cases, calcium carbonate, clay, talc, sedimentable barita, and the like may be added. Further, in addition to the coloring pigment,
Colored aggregates, colored plastics, synthetic mica, metal powder, and the like having a diameter of 1 mm or less may be blended as a solid colorant that does not dissolve in the paint.

Among the above paints, those having different colors can be used in combination with a plurality of colors. As for the method of combining the paints, a pattern having more aesthetic design can be formed by combining one of various attributes of the color such as color difference, hue, and brightness, or a plurality of different attributes.

In the present invention, at least one of the various paints described above is used in combination with another paint having a solubility parameter different from the paint by one or more.

The solubility parameter (SP value) of the paint is determined by the dispersing medium, the pigment, and other components to be incorporated.

The following equation is used to calculate the paint solubility parameter δ _sp:

δ _sp = (V _ml · δ _ml + V _mh · δ _mh ) / (V _ml + V _mh ) (1) where δ is a solubility parameter, V is a molecular volume at a cloud point, and a subscript ml is a low SP. The value solvent, mh, indicates a high SP value solvent.

The preferable range of the solubility parameter difference ΔSP is, for example, about 1.0 to 2.8 when the solvent type paints are combined. If the dissolution parameter difference ΔSP is less than 1.0, the desired concavo-convex pattern cannot be formed, and if it exceeds 2.8, paint design is difficult. When a paint and a solvent are combined, the dissolution parameter difference ΔSP = 2.5
About 3.8 is preferable.

When the paints are emulsion paints, an anionic emulsion and a cationic emulsion can be combined, or an emulsion paint and an electrolyte solution containing NaCl or the like can be combined.

The paints described above are separately housed in a coating gun, sprayed simultaneously from separate spray nozzles, and the spraying is performed such that both paints are partially mixed.

Among the coating conditions, the coating viscosity affects the design of the pattern to be coated. Specifically, the coating is performed at 8 to 60 seconds / NK # 2cup, preferably at 18 to 35 seconds / NK # 2cup. In general, the higher the coating viscosity, the sharper and larger the uneven shape of the pattern. However, if the coating viscosity is too high, it becomes difficult to handle and paint the paint. If the coating viscosity is too low, when trying to form a multicolor pattern with a plurality of paints, the paints are mixed too much, making it difficult to form a multicolor pattern.

The shape and size of the concavo-convex pattern also change depending on the atomizing air pressure for spraying. Generally, when the air pressure is low, the concavo-convex pattern tends to be large, and when the air pressure is high, the concavo-convex pattern tends to be small. Specifically, the air pressure range is 0.3-6.0kg
/ cm ² is preferred.

The state of the multicolor uneven pattern also changes by adjusting the discharge amount of the paint or the liquid agent. For example, the color contrast and the size and shape of the pattern can be changed by changing the ratio of the discharge amount from the different spray nozzles. As a specific discharge amount, the discharge amount from each spray nozzle is set at about 10 to 600 g / min. If the discharge amount is too large, the finished appearance will be poor, and if the discharge amount is too low, the coating efficiency will be poor and the productivity will be low. An arbitrary ratio is selected as a mutual ratio in a combination of a plurality of paints within a range of 1:99 to 99: 1.

The application of the coating method according to the present invention can be applied not only to the finish coating of the interior and exterior surfaces of buildings, but also to the surface finish coating of various structures or products. Applicable materials include concrete, mortar, PC, hollow molded plate, CFR
It can be applied to C, GRC, ALC, slate, veneer, gypsum board, calcium carbonate plate, magnesium carbonate plate, rock wool plate, other new building materials, or metals such as aluminum plate, zinc plate, iron plate and the like.

[Action]

When a plurality of colored paints having one or more differences in solubility parameter are sprayed simultaneously from different spray ports, the sprayed paints adhere to the painted surface in a partially mixed state. At this time, of the mixed two, the viscosity on the side having a higher solubility parameter increases, the fluidity is lost, and the mixture is solidified into a fibrous pattern or the like. On the other hand, the lower side of the solubility parameter becomes a medium without loss of fluidity and is distributed throughout the painted surface. As a result, in the finish of the painted surface, an uneven pattern is formed in a form in which the high solubility parameter material is aggregated into a fibrous shape or the like in the low solubility parameter material.

In addition, the paints are mixed in advance as described above,
When spraying and painting from the same spray nozzle, an uneven pattern cannot be formed and a multicolored pattern cannot be formed. Therefore, as described above, it is necessary to simultaneously spray from different spray ports and mix in a spray state.

When paints of different colors are combined, one of the colors becomes a base color, and an uneven pattern composed of the remaining colors is formed in the base color.

〔Example〕

Next, an embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 3 show an example of a coating gun used in the present invention.

The basic structure of the coating gun 1 is the same as that of an ordinary air spray gun or the like, but a plurality of paints and liquids can be sprayed at the same time. That is, a plurality of paint spray nozzles 21 and 22 are concentrically adjacent to each other (in the figure,
) Are provided. Each of the spray nozzles 21 and 22 is connected to a paint supply device (not shown) such as a paint tank via separate paint supply paths 31 and 32 which are separated from each other. In the paint supply path from the paint supply device to the spray nozzles 21 and 22 via the paint supply paths 31 and 32, a discharge amount measuring device (not shown) capable of measuring a supply amount, that is, a discharge amount of each paint is attached. I have.

A concentric spray air supply nozzle 40 is provided outside the spray nozzles 21 and 22, and a pair of auxiliary air supply nozzles 41 is provided at a position slightly away from the spray air supply nozzle 40. The auxiliary air supply nozzle 41 is
The spraying of air in the direction intersecting with the spraying direction of the spraying air supply nozzle 40 has the effect of making the spray pattern of paint that is circular only with the spraying air supply nozzle 40 into an elongated elliptical shape. The auxiliary air supply nozzle 41 and the spray air supply nozzle 40 are connected via an air supply path 42 to a pressure air supply source (not shown) such as an air compressor.

In the above-mentioned coating gun 1, a plurality of spray nozzles
By arranging 21, 22 concentrically, it is possible to spray a plurality of paints simultaneously and evenly, and to achieve a good and reliable mixture of parts in the spray state. , Coating gun 1 of such a structure
Is preferable for obtaining a uniform multicolor uneven pattern on the entire painted surface. However, a plurality of spray nozzles can be arranged vertically or horizontally, or a plurality of spray nozzles can be arranged in a form in which a circle is radially divided.

Of the structures of the coating equipment, other than the above,
Since it has the same structure as the coating apparatus used in the normal coating method, a detailed description is omitted. Further, the present invention can be implemented by changing to various coating apparatuses having structures other than those described above.

Next, a coating method using the coating apparatus will be described.

For example, as shown in FIG. 3, of the spraying nozzles 21 and 22 of the coating gun, the paint A is sprayed from the spraying nozzle 21 on the center side, and the solubility parameter for the paint A is 1 from the spraying nozzle 22 on the outer side. The different paint B is sprayed. In this case, in the finish of the coating, for example, as shown in FIG. 4, a complex fibrous uneven pattern a of the paint A is formed in the base color portion b of the paint B. At this time, if the paint B is transparent, the surface color of the workpiece S appears as the base color portion b. When a solvent is used instead of the coating B, there is no portion corresponding to the coating B, so that the surface color of the material S to be coated also appears as the base color portion b. The shape of the uneven pattern a is preferably the fibrous one shown in the figure because it is rich in design and is preferable. However, a spot-like or spot-like uneven pattern a may be formed. In addition, in addition to the base color portion b and the uneven pattern a, an intermediate color portion in which the paint A and the paint B are mixed may be formed.

Next, specific examples in which coating is actually performed by the coating method according to the present invention will be described.

Using the coating apparatus described with reference to FIGS. 1 and 2, coating was performed under the coating conditions shown in Table 1 below, and the obtained coated surface was observed and evaluated. Along with the examples according to the present invention, a comparative example combining two types of paints having a difference in solubility parameter of less than 1 was similarly coated and compared with the examples. The results are shown in Table 1.

 In the table, the names of the paints indicate the following trade names.

HiCR Deluxe (Nippon Paint Co., Ltd., synthetic resin blend paint) Terra Vere (Nippon Paint Co., Ltd., acrylic resin paint) Ken Ace (Nippon Paint Co., Ltd., acrylic resin paint) Lavalak 3000 (Nippon Paint Co., Ltd.) , Vinyl chloride resin paint) DAN tile SN top coat (Nippon Paint Co., Ltd., acrylic resin paint) Odecoat (Nippon Paint Co., Ltd., synthetic resin emulsion paint) Hi-Tex (Nippon Paint Co., Ltd., synthetic resin formulation) Paint) Acrylic resin paints A, B, and C are each obtained by preparing a plurality of paints. Mineral spirit and xylene are solvents.

From the above results, it was demonstrated that the coating method of the present invention can form an extremely complicated and highly-designed concavo-convex pattern which cannot be realized by the conventional coating method. In addition,
Examples 1 to 5 are cases where a solvent type paint is combined,
Examples 8 and 9 are cases where a solvent type paint and an emulsion type paint are combined, and Examples 6 and 7 are cases where a solvent type paint and a solvent are combined. Therefore, Examples 6 and 7 are reference technologies that are not included in the technical scope of the present invention.

〔The invention's effect〕

According to the method for coating a concavo-convex pattern according to the present invention described above, it is only necessary to simultaneously spray colored paints having different solubility parameters by one or more from different spray ports.
A simple fibrous pattern or the like can be formed by a simple operation of the process. As the paint, an ordinary paint can be used as it is, and therefore, a highly flexible paint can be used in which any kind and color of paint can be used in combination according to the application and color design. In addition, since a special paint for forming a concave and convex pattern containing a convex pattern forming agent is not used, the painting operation is simple and can be performed at low cost. The obtained concavo-convex pattern is an extremely highly-designed concavo-convex pattern, which is difficult to realize by means of forming a pattern by a conventional coating method, and enhances the appearance or the design of various painted surfaces of a building or other painted surfaces. it can.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a coating gun used in the coating method according to the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 shows the flow of paint and air in the coating gun. FIG. 4A is a schematic cross-sectional view, FIG. 4A is a front view of a painted surface, and FIG. 4B is a schematic cross-sectional view. 1 ... Coating gun, 21,22 ... Spray nozzle, A, B ... Paint, a ... Uneven pattern part, b ... Base color part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B05D 5/06 E04F 13/02 B05D 1/00-1/02

Claims (1)

(57) [Claims] 1. A method of coating a concavo-convex pattern, in which colored paints having at least one solubility parameter different from each other are sprayed simultaneously from different spray ports, and a part of the sprayed paint is mixed.