JP2002273328A - Method for forming multicolor pattern coating film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of easily forming a multicolor pattern coating film having extremely high-degree design effect by a simple coating method. SOLUTION: In the method for forming the multicolor pattern coating film by applying more than two kinds of coating material having different hues in an overlapped or separated state, more than two kinds of the coating material 1a-1c having different hues are successively sent into a coating material supply passage connected to an applicator 6 without interrupting a color changeover and the coating of next color coating material succeeding to the coating of previous color coating material is continuously performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a multicolored coating film, and more particularly, to a method for supplying two or more types of coating materials having different color to a coating tool while changing colors, without interrupting the coating. The present invention relates to a method for forming a multicolor pattern coating film which is performed continuously.

[0002]

2. Description of the Related Art As a general method for forming a multicolor pattern coating film, a method of applying a multicolor pattern paint as specified in JIS K 5667 is known. The multi-color paint is a liquid or gel-like color paint particles of two or more colors suspended in a dispersion medium, and the color paint particles contained in the paint are overlapped or arranged in one coating, A multi-colored pattern called a so-called color scattering pattern is formed, and the appearance of the coating film is more excellent in design compared to a coating film with a single color finish. In particular, it is widely used for finish coating of objects to be coated such as inner and outer walls of buildings.

[0003] However, in the multicolored pattern obtained by the multicolored paint, as long as the same paint is used, the formed pattern is the same over the entire surface of the object to be coated, and in that respect, a uniform pattern with little change is provided. There is a problem that can only be obtained. In particular, in recent years, the design required for objects to be coated such as the inner and outer walls of the building is becoming more sophisticated, and thus there is a problem that the above-mentioned conventional multi-color paints cannot sufficiently meet such requirements.

[0004] As another method of forming a multi-color paint film, a plurality of paints having different color tones are applied in a scattered manner with a spray gun, and the same color dispersion paint film as that of the multi-color paint film is applied. Is known (for example, JP-A-10-329500). According to this method, it is possible to form a varied multicolored pattern by changing the application amount of each colored paint or changing the coating conditions such as the paint pressure and the air pressure at the time of painting. Need to be applied by separate spray guns, the number of spray guns increases in accordance with the number of colors of the paint, and the coating operation itself becomes complicated and the coating apparatus becomes large.

In order to apply a plurality of paints having different color tones as described above, a method or apparatus using a single spray gun has been put to practical use in many painting fields. In order to prevent mixing of the previous color paint and the next color paint, a process of cleaning the paint supply path between the previous color paint and the next color paint is required, and as a result, the painting work efficiency due to the interruption of the paint is reduced. There are problems such as lowering, loss of paint, treatment of washing and distribution wastewater, and the like.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a conventional multi-pattern paint which does not sufficiently cope with the finish coating of an object to be coated which requires a high design property, and that a plurality of paints having different colors are used. In the method of forming a multi-colored paint film by re-coating, the purpose is to solve the problem of complicated painting work and the enlargement of the coating equipment, a multi-colored paint film with extremely high designability, It is an object of the present invention to provide a method for forming a multicolor pattern coating film which can be easily formed by a simple coating apparatus without causing paint loss.

[0007]

According to the present invention, there is provided a method for forming a multi-colored pattern coating film, which comprises applying two or more kinds of paints having different color tones or applying different coatings to form a multi-colored pattern coating film. In the method, the two or more kinds of paints having different color tones are composed of paints colored with colored particles having a particle diameter of 0.05 mm or more, and the paints are changed in a paint supply path connected to a paint tool. Are successively fed without interruption, and the coating of the next color paint subsequent to the coating of the previous color paint is performed continuously.

[0008] The paint used in the method of forming a multicolored coating film is preferably one that is colored with colored particles having a particle size of 0.05 to 30 mm. It is preferable that the coating composition is a coating composition obtained by dispersing a color coating particle which is a droplet of a color coating material containing at least a color coating particle obtained by encapsulating the surface with a gelling layer, and dispersing this in an aqueous dispersion medium. In particular, in such a coating material, it is preferable that a coating film forming component is also contained in an aqueous dispersion medium for dispersing colored coating particles.

The above-mentioned paint is an inorganic and / or organic colored aggregate particle containing a coating film forming component and a coloring material, and having a particle diameter of 0.05 to 1 mm. Is preferred. Further, in the present invention, the applicator for applying the paint is preferably an air spray gun or a roller.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The method for forming a multicolor pattern coating film of the present invention will be described below with reference to the drawings. FIG. 1 is a main part configuration diagram of an example of a coating apparatus that can be used for forming a multicolor pattern coating film of the present invention.
Are paints 2a, 2b, and 2c, each of which has a different color tone; 2a, 2b, and 2c, paint containers for storing the paint; 3a, 3b, and 3c, paint pipes for supplying each paint to the color change valve 4; A paint supply hose 5 for supplying a paint whose color has been changed by a color change valve is connected to a paint gun. Note that the coating apparatus described here is an example for forming a multicolor pattern coating film according to the present invention, and the present invention is not limited to this.

In order to form the multicolor pattern coating film of the present invention using the above coating apparatus, paints having different color tones required to obtain a target multicolor pattern are arbitrarily selected (in FIG. 1, three types of paints are used). But is not limited to this) and stored in each paint container. The paint in the paint container is supplied to a color change valve (hereinafter, referred to as CCV) in a paint pipe by a pressure feed pump, a gear pump, etc. (not shown), and the paint supply hose is changed in color by the CCV. And a multi-color pattern coating film is formed by performing coating such as multi-coating or separate coating.

In particular, in the present invention, the supply of the next color paint subsequent to the supply of the previous color paint is continuously performed without interruption during the color change in the CCV, and the previous color paint in the paint supply hose is replaced with the next color paint. It is a major feature of the present invention that the material is extruded. Therefore, since the preceding color paint and the next color paint are supplied to the paint tool without interruption, continuous painting becomes possible. The paint supply state at that time will be described with reference to FIG. FIG. 2 shows the paint supply hose 5 in FIG.
In the cross-sectional view taken along the line AA of FIG.
a, the next-color paint 1b and the next-color paint 1c are supplied without interruption in the direction of the arrow.

At the time of the above coating, the order of CCV color change and its supply amount are determined so that a desired multicolor pattern can be formed. If a control device (not shown) is connected to the CCV and the coating tool so that the setting of a part and the like and the coating pattern can be controlled in conjunction with each other, the same multi-color pattern coating film can be formed. Can be repeated, and mass production is also possible.

FIG. 3 is a cross-sectional view of an object on which a multicolored coating film is formed by applying the above-mentioned coating materials having different color tones. Is formed, a coating film of the next color paint 1b is formed in a portion adjacent to the coating film, and the next color paint 1c is spotted on the coating film formed by the previous color paint and the next color paint. This shows a state in which a multicolor pattern coating film is formed by being applied.

The coating which can be used in the method for forming a multicolored coating film of the present invention includes a particle size of 0.05.
It is particularly important that the paint is colored with colored particles of not less than mm, and when such a paint is used, the paint of the previous color and the paint of the next color can be supplied without mixing in the paint supply hose. And has the characteristic that a clear multicolored pattern coating film can be formed. In particular, the feature of being able to supply paint without causing color mixture is exhibited regardless of the length of the paint supply hose, so it can be used for line painting. It can also be suitably used for painting. In particular, as the coloring particles of the paint that can be used in the present invention,
It is preferable that the particle size is 0.05 to 30 mm.
When the particle diameter is smaller than 0.05 mm, the composition approaches a paint composition which does not change at all from a colored paint colored with a usual paint pigment, and it becomes difficult to prevent color mixing.
If it is larger than 0 mm, the coating workability may decrease, and the smoothness of the formed coating film may decrease.

The coating material which can be preferably used in the present invention is a coating material droplet which contains at least a coating film forming component and a coloring material and whose surface is encapsulated by a gelling layer. As colored particles,
A coating obtained by dispersing the colored particles in an aqueous dispersion medium (hereinafter referred to as an encapsulated particle-containing coating) may be mentioned. Since this paint is obtained by granulating the liquid colored paint itself to an arbitrary size, even when the paint itself is colored using a coloring material such as a pigment or dye of fine particles, the paint at the time of painting is used. This is preferable because color mixing in the paint supply hose during color change is less likely to occur. In addition, the colored paint particles contained in this paint are liquid and easily deformed, for example,
Even in a paint passage whose diameter is smaller than the diameter of a colored paint particle, such as a paint nozzle of an air spray gun, the colored paint particles can be easily deformed and pass through, and various paint tools are used for painting. It is also preferable in that the coating material itself can be easily applied, and the colored coating particles themselves spread flat to the coated surface, so that a smooth coating film can be formed even when the particle size is large.

The colored paint particles in the paint contain a film-forming component, and the colored paint particles themselves have the ability to form a coating film. It is possible to form a coating film having excellent properties. However, if a coating film forming component (for example, a synthetic resin emulsion, etc.) is also contained in the aqueous dispersion medium, the coating film forming ability of the colored coating particles may be reduced. In the present invention, such a coating film has an advantage that a coating film forming component has an advantage of forming a coating film with excellent film forming ability, and has excellent light resistance, water resistance, glossiness, and stain resistance. It is particularly preferable to use a paint obtained by dispersing the above-mentioned colored paint particles encapsulated in a gelling layer in an aqueous dispersion medium containing the formed components.

Since the above-mentioned paint containing encapsulated particles belongs to the same type of paint as the conventional colorful pattern paint, it can be manufactured by the same method as the colorful pattern paint. As an example, for example, Japanese Patent Publication No. 50-5732, Japanese Patent Publication No. 51-61
No. 75, specifically, a hydrophilic colloid-forming substance (polyvinyl alcohol, cellulose derivative, polyethylene oxide, casein, starch, guar gum derivative, etc.) and an insolubilizing agent capable of insolubilizing the colloid-forming substance Agents (for example, borate, tannate, magnesium-montmorillonite clay, etc.) act on each other to make use of a gelling reaction in which a kind of three-dimensional network is formed. By generating the particles on the surface of the colored paint particles, the colored particles encapsulated in the gelling layer are formed, and the paint containing the encapsulated particles can be obtained.

More specifically, a film-forming component, one of the constituents of the liquid colored paint particles, is a synthetic resin emulsion, and an appropriate paint pigment is added to form a colored emulsion paint. After adding a colloid-forming substance to form a liquid colored paint, the liquid colored paint is added to an aqueous dispersion medium containing the above-described insolubilizing agent, and dispersed by an appropriate dispersing machine (for example, a high-speed dissolver or the like). A coating containing colored paint particles encapsulated in a gelling layer in an aqueous dispersion medium in the surface layer while undergoing a gelling reaction with the insolubilizing agent in the dispersion medium while becoming a liquid (droplet form). It can be.

The particle diameter of the colored paint particles in the above paint is not particularly limited as long as it is 0.05 mm or more, and may be arbitrary, but is preferably in the range of 0.5 to 30 mm. More preferably, it is in the range of 5 to 10 mm. In the encapsulated particle-containing paint, the encapsulated colored paint particles may be composed of only a single color, or may be a multicolored paint by mixing a plurality of colored paint particles of different colors. good.

In the present invention, in addition to the above-mentioned encapsulated particle-containing paint, a paint containing at least inorganic and / or organic colored aggregate particles as a film-forming component and a colorant (hereinafter referred to as a colored aggregate-containing paint) Is also preferably used. As the coating film forming component which is a component of the colored aggregate-containing paint, various synthetic resins for paint commonly used in the paint industry (for example, vinyl acetate resin, vinyl chloride resin, acrylic resin, epoxy resin, polyurethane resin) , A fluororesin, a vinyl versatate resin, a silicone resin, an acrylic / silicone resin, etc.), and an emulsion of these synthetic resins is particularly preferable.

Examples of the coloring material include inorganic and / or organic coloring aggregate particles, specifically, fluorite, silica sand, perlite, ceramic powder, crushed natural stone powder, glass powder, wood powder, and various synthetic resin powders. These colored aggregate particles may be used alone or as a mixture of two or more particles having different color tones. Further, the particle diameter of these colored aggregate particles is preferably 0.05 to 1 mm,
It is particularly preferred that it is 0.1 to 0.5 mm. further,
When these aggregate particles are not colored particles, if necessary, they can be made into colored aggregate particles by a method such as surface coating or dyeing.

The method of forming a multicolored pattern coating film of the present invention comprises supplying two or more kinds of paints having different color to the coating tool while changing the color, and performing continuous coating. The paint is not particularly limited, and may be different in any state. As an example, (1) Two or more kinds of paints having different colors are used. (2) Even if the color tone is similar, the color tone is made different by giving a difference in shading, opacity, gloss, and the like. (3) Among two or more kinds of paints having different color tones, at least
One type is multicolor paint. (4) When a multi-color pattern paint is used, the color tone is changed by changing the size or shape of the contained colored particles. And the like, all of which are included in the scope of the present invention.

When coating, the paint of the preceding color and the paint of the next color (and, if necessary, the third, fourth,... Paints)
The method of forming a multicolor pattern by partially coating the surface of the object to be coated, forming a pattern by partially coating a plurality of paints, and then applying another paint from above on a spotted or undercoat layer. A method of forming a multicolor pattern by partially applying a layer so that the color tone is not concealed, or applying a front color paint over the entire surface of the object to be coated,
A coating film formed as described above, which can be changed in a wide range so as to obtain a target multicolor pattern, such as a method of partially applying a next color paint from above to a multicolor pattern. Since the color tone of the colored coating film of the preceding color paint and the color coating of the next color paint are combined, and the resulting multicolor pattern coating film is rich in design, any of these cases is within the scope of the present invention. Included.

The applicator which can be used in the method for forming a multicolored coating film of the present invention is not particularly limited, and an applicator commonly used in the coating industry can be used. Suitable applicators include an air spray gun, an airless spray gun, a roller, a brush, a curtain flow coater, and the like. More preferably, a roller is used. In particular, when applying a paint containing colored particles having a relatively large particle diameter, such as a multi-color paint, it is preferable to use an air spray gun having a die diameter of 2 to 4 mm. It is preferable to use a sand roller.

The substrate on which the multicolor pattern coating film can be formed by the method of the present invention can be a wide variety such as wood, concrete, stone, glass, porcelain, plastic, and metal. Various members constituting the inner and outer wall surfaces of the object, for example, ALC panel, concrete block, slate plate, cement-based molded product, wood wool cement plate, tile, brick and the like can be mentioned.

[0027]

The present invention will be described in detail with reference to the following examples, but these examples are only examples and do not limit the present invention. In the following examples, unless otherwise specified,%
Represents weight%, and the blending amount of each component is represented by part by weight.

Example 1 (1) Preparation of aqueous dispersion medium A mixture of 25 parts of a 4% aqueous magnesium silicate aqueous dispersion, 5 parts of a 5% aqueous solution of ammonium biborate, and 25 parts of a 1% aqueous solution of sodium carboxymethyl cellulose was stirred. After mixing, 45 parts of water was added to dilute to obtain an aqueous dispersion medium.

(2) Preparation of white paint 38 parts of an acrylic resin emulsion (Polytron E800, manufactured by Asahi Kasei Kogyo Co., Ltd.) and 28.5 parts of a 1.5% aqueous solution of a nonionic guar rubber derivative were thoroughly mixed with stirring to obtain a composition (a). And Next, 20 parts of titanium oxide, 1 part of an anionic polymer dispersant (manufactured by San Nopco Co., Nopcospar 44C) and 12.5 parts of water were sufficiently mixed and stirred with this composition (a) to obtain a pigment dispersion ( b) was added and stirring and mixing were continued to obtain a white paint base. 60 parts of this white paint base was added to 40 parts of the aqueous dispersion medium obtained in the above (1), and the white paint base was stirred with a dissolver so that the particle diameter became about 1 to 3 mm to obtain a white paint. The paint thus obtained was a white paint in which liquid white paint particles encapsulated by a gelling layer derived from a nonionic guar rubber derivative were dispersed.

(3) Preparation of black paint A black paint base was obtained by treating the pigment dispersion (b) in the white paint of the above (2) in exactly the same manner except that the titanium oxide was replaced with black iron oxide. Similarly, a black paint was obtained.

(4) Preparation of Multicolored Paint A reddish-brown paint base was prepared in exactly the same manner except that the titanium oxide of the pigment dispersion (b) in the white paint of the above (2) was replaced with red iron oxide. A reddish brown paint was prepared in the same manner using the base. Similarly, a green paint was prepared by replacing the titanium oxide in the pigment dispersion (b) of the above (2) with phthalocyanine green. The obtained reddish brown paint 5
0 parts and 50 parts of the green paint were stirred and mixed to obtain a multicolored paint in which red-brown paint particles and blue paint particles encapsulated in the gelling layer were mixed and dispersed.

(5) Formation of multicolored paint film The white paint, black paint and multicolored paint obtained above were
Each paint has a different color tone, and is set in a paint container of an automatic coating device equipped with a CCV (color change valve).
The color is changed in the following order and continuously sent to the air spray gun (paint nozzle diameter 3.5mm), air pressure 0.4MP
In a, the surface was coated on the surface of the ALC plate whose undercoat was treated.

[0033] The coating is performed by changing the white paint first sent to A
A part of the surface of the LC plate is applied, a black paint as a next color paint is applied to an area adjacent to a white paint application part of a previous color, and a multicolored paint as a next color paint successively sent is applied. And applied to the entire area between the white paint application area and the black paint application area to such an extent that the color tone of the white paint and the color tone of the black paint are not completely concealed (applied amount: about 100 g / m ² ), and then dried to obtain a multicolor A patterned coating was formed.

In the above-mentioned coating, there was almost no color mixing at the time of color change between the respective coatings, and the coating could be performed continuously without interruption. In addition, the obtained coating film was a multicolor pattern coating film having a deep, extremely varied color, in which the color tone of the lower white coating film and the black coating film was added to the multicolor pattern coating film.

Example 2 (1) Preparation of an aqueous dispersion medium containing a film-forming component: 25 parts of a 4% aqueous magnesium silicate dispersion, 5 parts of a saturated aqueous solution of sodium tetraborate, and 25 parts of a 1% aqueous solution of sodium carboxymethyl cellulose. After the mixture was stirred and mixed, 45 parts of an acrylic resin emulsion (manufactured by Asahi Kasei Corporation, Polytron E800) was added and mixed to obtain an aqueous dispersion medium containing a film-forming component.

(2) Preparation of white paint, black paint, and multicolored paint The composition of the aqueous dispersion medium in Example 1 was changed to the aqueous dispersion medium (1) containing the film-forming component of this example. A white paint, a black paint, and a multicolored paint were prepared in exactly the same manner.

(3) Formation of multicolored paint film The white paint, the black paint and the multicolored paint obtained above were applied in the same manner as in Example 1, and color mixing between the respective paints at the time of color change. No coating occurred, and the coating operation could be continuously and easily performed without interruption. In addition, the obtained coating film is a multicolor pattern coating film in which the color tone of the lower-layer coating film is added, which is extremely varied and deep, and in addition, the film forming property of the coating film forming component in the dispersion medium is added. This formed a tough coating.

Example 3 (1) Preparation of Paint Containing Colored Aggregate 44 Parts of Acrylic Resin Emulsion (Polytron E800, manufactured by Asahi Kasei Kogyo Co., Ltd.), Film-forming Aid (Texanol CS-12, manufactured by Eastman Chemical Japan) 4. 5
Part, defoamer (San Nopco, SD Deformer 50
16) 0.05 part, 1.4 parts of a surfactant (manufactured by Kao Corporation, Emulgen 120) and colored aggregate particles (manufactured by Shinto Toyama Co., Ltd.)
50 parts of yellow silica sand having a particle diameter of about 0.07 to 0.3 mm) were stirred and mixed to prepare a yellow paint. In the same manner, a green paint was prepared using green quartz sand, and a brown paint was prepared using brown quartz sand.

(2) Formation of multicolored paint film Each of the color paints obtained above was set in the same coating apparatus as in Example 1, and “yellow paint → green paint → brown paint”
The color was changed in the following order, and the entire surface of the ALC plate whose surface was undercoated was successively overcoated so that the coating amount of each paint was about 300 g / m ² . In this coating, there is almost no color mixing between the respective paints at the time of color change, the coating can be performed continuously without interruption, and the obtained coating film has yellow particles, green particles and brown particles. The mixed multi-colored pattern coating film was extremely varied.

Example 4 (1) Formation of multicolored paint film The yellow paint, green paint, and brown paint of Example 3 were supplied to a sand-bone roller while changing the color in the same manner as in Example 1, and Using a bone roller, the surface of the ALC plate, whose surface was primed, was partially applied separately and painted. Coating could be performed without any trouble, and the formed coating film showed a slight color mixture between each coating material, but overall a high-design multicolor pattern coating film was formed by applying yellow, green, and brown separately .

[0041]

As described above, according to the method of forming a multicolor pattern coating film of the present invention, a plurality of paints having different color tones can be successively applied while changing colors arbitrarily. There is an advantage that an efficient painting operation can be performed, such as no interruption of paint, no need to wash the paint path to prevent color mixing, and no paint loss. Further, there is an advantage that a coating film having a very high design property can be easily formed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of a coating apparatus which is an embodiment of a method for forming a multicolor pattern coating film of the present invention.

FIG. 2 is a cross-sectional view showing a state of supplying a paint in a paint supply hose in a method of forming a multicolor pattern coating film of the present invention.

FIG. 3 is a cross-sectional view of an object on which a multicolor pattern coating film is formed according to the present invention.

[Explanation of symbols]

 1a, 1b, 1c paint 2a, 2b, 2c paint container 3a, 3b, 3c paint piping 4 color change valve 5 paint supply hose 6 paint tool 7 object to be painted

Continued on the front page F term (reference) 4D075 AA02 AA71 AA74 AC21 AC84 AE02 CA47 CB37 EB57 4J038 BA021 BA121 BA191 CD021 CD091 CE021 CF021 CG001 DB001 DF011 DL031 HA456 HA486 HA526 KA08 KA15 KA20 PC08 PC08 PC10

Claims (6)

[Claims] 1. A method of forming a multicolored coating film by applying two or more kinds of paints having different color tones or applying different colors, wherein the two or more kinds of paints having different color tones have a particle diameter of 0.05 mm. The paint is colored with the above colored particles, and the paint is sequentially fed into the paint supply path connected to the paint tool without interrupting the color change, so that the paint of the next color following the paint of the previous color is continuously applied. A method for forming a multicolored pattern coating film characterized by performing the following steps. 2. The paint according to claim 1, wherein the particle size is 0.05 to 30 mm.
The method for forming a multicolor pattern coating film according to claim 1, wherein the multicolor pattern coating film is colored with the colored particles of 3. The method according to claim 1, wherein the paint is a droplet of a color paint containing at least a coating film forming component and a colorant, and the color paint particles whose surface is encapsulated by a gelling layer are dispersed in an aqueous dispersion medium. The method for forming a multicolor pattern coating film according to claim 1 or 2, wherein the multicolor pattern coating film is dispersed. 4. The method for forming a multicolor pattern coating film according to claim 2, wherein the aqueous dispersion medium contains a coating film forming component. 5. The coating composition comprises a coating film forming component and a colorant, and the colorant has a particle size of 0.05 to 1 mm.
2. The method for forming a multicolored coating film according to claim 1, wherein said particles are inorganic and / or organic colored aggregate particles. 6. The method according to claim 1, wherein the coating tool is an air spray gun or a roller.