JPH0625318B2 - Multicolor pattern forming paint and multicolor pattern forming method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention has a soft feeling, and can form a uniform multicolored coating film by a coating means such as roller coating or brush coating that applies a shearing force. The present invention relates to a multicolor pattern forming paint and a multicolor pattern forming method using the paint.

<Prior art and its problems to be solved> As a conventional method for forming a multicolored paint film, particles of the paint obtained by suspending and dispersing in water a colored organic solvent-based paint that is incompatible with water are used. A typical method is to form a multicolor pattern coating film by spray-coating a multicolor pattern forming coating material which is dispersed and contained in an aqueous coating material such as an emulsion coating material as colorant particles.

However, with this method, although the obtained multicolored coating film is a uniform multicolored coating film, the unevenness of the colorant particles on the surface of the coating film makes it rough and soft when touched. There was a problem that the touch feeling was poor and the contrast of the pattern was sharp due to the coloring agent particles, resulting in a hard feeling.

Also, since the paint is sprayed, the paint is often scattered, which not only results in a bad working environment but also wastes due to paint loss.

Therefore, a method of forming a multicolored pattern by roller painting or brush painting, which requires less paint loss and requires less skill in painting, can be considered.

However, roller coating and brush coating are subjected to a high shearing force at the time of coating, so that the colorant particles may be offset due to movement, and the colorant particles are in a liquid or gel state, so the physical strength is weak, and therefore the shearing force is high. Therefore, there is a problem in that the multicolored coating film obtained as a result is likely to be non-uniform because it is easily broken. Therefore, the roller coating and the brush coating by one-time application are hardly adopted at present. As a method for forming a two-color multicolored coating film by roller coating, a certain colored paint is applied to the entire surface of the uneven base material or the uneven coating film, and then a paint of a different color from the colored paint is applied only to the convex portions. Although a method is known, this method has problems that the obtained multicolored pattern has a clear contour, does not have a soft appearance, and requires double coating.

In view of such a current situation, the present invention has been earnestly studied in order to solve the above-mentioned problems, and as a result, there is a soft feeling on the appearance and even when it is touched with a hand, and roller coating and brush coating are applied once. The present invention has been accomplished by finding a coating material capable of forming a uniform multicolored coating film.

<Means for Solving the Problems> That is, the present invention is to form a multicolored pattern in which a colorant particle having no compatibility with a dispersion medium of the coating material and a hollow particle having no liquid impregnating ability are dispersedly contained in an aqueous coating material. It is related to paints.

The water-based paint used in the present invention is a dispersion medium of water or water and a small amount of an organic solvent (the dispersion medium in the present invention means a liquid in which constituent components such as a resin of the water-based paint are dispersed or dissolved). Ordinary emulsion paints, water-soluble paints and the like. That is, acrylic resin type,
Vinyl acetate resin type, urethane resin type, epoxy resin type,
Binder resin such as alkyd resin-based or polybutadiene-based resin; dispersion medium consisting of water or water and a small amount of organic solvent; and if necessary, coloring amount of pigment, dye, extender pigment, etc., thickener, dispersant, It is composed of various additives such as a defoaming agent, a film forming aid, and an antiseptic.

The multicolor pattern-forming coating material of the present invention comprises, in the water-based coating material, colorant particles that are incompatible with the dispersion medium of the water-based coating material, that is, that are insoluble in the dispersion medium and liquid-impregnating hollow particles. It is a paint.

Examples of the colorant particles include colored powder particles such as ordinary powder coating materials, but in the case of coating by a coating means that applies shearing force at the time of coating such as roller coating and brush coating, the colorant particles particularly described below. Is preferable because a uniform multicolored coating film can be formed.

That is, a sparingly water-soluble binder such as an alkyd resin-based, acrylic resin-based, urethane resin-based, vinyl chloride resin-based, chlorinated rubber, and vegetable oil; an organic solvent that dissolves the binder; a color pigment,
Ordinary colored organic solvent-based paint (provided that it is incompatible with the dispersion medium of the water-based paint) consisting of extenders, aggregates, various additives, etc. Flexible colored particles or microencapsulated products obtained by dispersing in water in the presence of a water-soluble thickener, a dispersant, a chelating agent and the like are preferable as the colorant particles of the present invention. That is, since the colorant particles obtained in this manner are flexible, even if a shearing force is applied during coating in the presence of hollow particles, which will be described later, the colorant particles will be deformed at that time, and they will be accompanied by the traveling movement of the coating machine. It is difficult for them to move together, and therefore they are uniformly distributed in the coating film, and a uniform multicolored pattern is obtained.

The particle size of the colorant particles is about 20 to 500 μ, preferably 3 in view of stability in paint, recognizability of patterns, and the like.
About 0 to 200 μ is suitable.

The hollow particles have a function as a cushioning material, suppress the movement of the colorant particles accompanying the progress of the coating machine, and cover the poor mechanical stability of the colorant particles, and roller coating and brush coating. It is also used in order to enable the formation of a uniform multicolored coating film by a coating means such as.

The hollow particles have a low specific gravity because they are hollow (for example, the true specific gravity is 0.5 or less, preferably 0.1 or less.) Therefore, after coating, the coating film floats on the coating surface while it is in a wet state The resulting coating film has a rough texture and a soft touch feeling when touched by hand.

Furthermore, when the hollow particles are transparent, due to the difference in the refractive index between the inner gas and the outer wall of the hollow particles, and because the hiding power is small even when colored, the hollow particles mainly distributed on the coating surface are passed through. The color of the visible colorant particles has a reduced sharpness, so that the resulting multicolored pattern has a soft color tone and has a soft appearance.

As described above, the hollow particles need to be liquid-impregnated so that they can float on the surface of the coating film.For example, a porous material such as Shirasu balloon absorbs the liquid and has a specific gravity similar to that of the coating material. It is not suitable because it becomes difficult to float.

Representative examples of such hollow particles include hollow resin particles such as vinylidene chloride-acrylonitrile copolymer, acrylic ester-styrene copolymer, and hollow glass beads. The shape of the hollow particles is
A spherical shape is desirable, and a particle size of 200 μm or less, preferably about 20 to 100 μm, is suitable from the viewpoint of the function as a cushioning material, the stability of the coating material, and the workability of coating.

The content of the colorant particles in the multicolor pattern-forming coating material of the present invention is 0.5 to 50% by weight (solid content conversion), preferably 10%.
-40% by weight is suitable, and in this range, an appropriate multicolored coating film can be obtained, and the stability of the paint is good.

The content of the hollow particles is 0.01 to 15% by weight (solid content), preferably 0.1 to 5% by weight. Within this range, a uniform multicolored coating film having a soft feeling can be obtained.

As a method for coating the multicolor pattern-forming coating material of the present invention, conventional spray coating or the like can of course be used, but it is a coating method that requires a shearing force such as roller coating or brush coating, which has been difficult to form a uniform multicolored pattern. However, it is possible to form a uniform multicolored pattern with one application.

Although the film thickness is not particularly limited, it is suitable to apply it so as to be 50 to 500 μ (dry film thickness). It is naturally dried or forcedly dried at a temperature at which the hollow resin particles are not melted, and various colors are obtained. Form a patterned coating film.

<Effects of the Invention> Since the multicolor pattern forming coating material of the present invention contains hollow particles, the hollow particles exhibit the function as a cushioning material even in a coating means such as roller coating or brush coating to which a shearing force is applied. Therefore, even when the flexible colorant particles are used, a multicolored coating film in which the colorant particles are evenly distributed can be obtained without being destroyed, and the specific gravity is reduced, so that the coating workability is also good.

In addition, since the hollow particles having a low specific gravity float up on the surface of the coating film after coating until the coating film dries, the resulting coating film has a soft appearance and feel, and also has heat retention and heat insulation properties. , Which has excellent soundproofing.

The multicolored pattern of the present invention has various colors depending on the color of the water-based paint and the color of the colorant particles (the colorant particles may be a combination of two or more colors) or the color of the hollow particles. A multicolored coating film can be obtained by the combination of.

Hereinafter, the present invention will be described in more detail with reference to Examples. In the examples, "part" and "%" are based on weight.

[Preparation of White Colorant Particle Dispersion (A)]

Acrylic resin solution Note 1) 60 parts Titanium oxide 20 parts Calcium carbonate 10 parts Toluene 10 parts Note 1) "Acrylic 801" (trade name of Dainippon Ink and Chemicals, Inc.) 40 parts of a white organic solvent type paint composed of the above composition, Water 50
After gradually adding to a part with stirring, 0.3 part of a dispersant [“Demoll P” (trade name, manufactured by Kao)] and a thickener [“Natrasol 250 MR” (trade name, manufactured by Hercules)] 0.
3 parts were added to prepare a dispersion liquid (A) of white colorant particles having an average particle size of about 80 μm.

[Preparation of yellow colorant particle dispersion (B)]

Acrylic resin solution Note 1) 60 parts Lead chromate 20 parts Calcium carbonate 10 parts Toluene 10 parts Dispersion liquid of yellow colorant particles in the same manner as the dispersion liquid (A) in the yellow organic solvent type paint having the above composition. (B)
Was prepared.

[Preparation of red colorant particle dispersion liquid (C)] Acrylic resin solution Note 1) 60 parts Permanent carmine 5 parts Calcium carbonate 25 parts Toluene 10 parts A) Dispersion of red colorant particles (C)
Was prepared.

[Preparation of orange colorant particle dispersion (D)]

An orange organic solvent type paint obtained by mixing 50 parts of the white organic solvent type paint, 30 parts of the yellow organic solvent type paint, and 20 parts of the red organic solvent type paint in water with the dispersion liquid (A). Similarly, a dispersion liquid (D) of orange colorant particles was prepared.

[Preparation of Red, Yellow and White Mixed Colorant Particle Dispersion (E)]

Equal amounts of the dispersion liquid (A), the dispersion liquid (B), and the dispersion liquid (C) were mixed to prepare a red, yellow, and white mixed colorant particle dispersion liquid (E).

[Preparation of red colorant particle dispersion (F)]

Alkyd resin solution * 2) 50 parts Permanent carmine 5 parts Calcium carbonate 30 parts Mineral spirits 15 parts * 2) "Beccosol P470" (trade name, manufactured by Dainippon Ink and Chemicals, Inc.) A dispersion liquid (F) of red colorant particles in the same manner as the dispersion liquid (A).
Was prepared.

Examples 1 to 5 and Comparative Examples 1 to 2 The compounding ingredients shown in Table 1 were mixed to prepare multicolor pattern forming coating materials.

The numerical values in the table are "parts".

A paint for forming a multicolored pattern was applied on the slate plate which had been subjected to the base treatment by a medium-brush roller and a flat brush, respectively, so that the dry film thickness was about 100 μm, and dried at room temperature for 2 hours.

The pattern morphology, pattern uniformity, and softness of the obtained coating film were as shown in the lower column of Table 1.

As is apparent from Table 1, the coating films obtained by using the multicolor pattern forming coating materials of Examples 1 to 5 of the present invention have spotted multicolor patterns in which colorant particles are uniformly distributed, and The color of the colorant particles was alleviated and the color tone was soft and had a soft feeling.

On the other hand, a coating obtained using the multicolor pattern forming coating composition of Comparative Example 1 in which liquid-impregnating shirasu balloons were used instead of liquid-impregnating hollow particles and Comparative Example 2 in which hollow particles were not used The film had a multicolored pattern in which the distribution of the colorant particles was uneven and uneven, and the colorant particles were exposed on the surface of the coating film, and there was no soft feeling.

Claims (3)

[Claims] 1. A paint for forming a multicolored pattern, wherein a colorant particle which is incompatible with a dispersion medium of the paint and a hollow particle which has no liquid impregnation property are dispersedly contained in an aqueous paint. 2. The multicolor pattern formation according to claim 1, wherein the colorant particles are particles obtained by suspending and dispersing in water a color paint which is incompatible with water. paint. 3. A method for forming a multicolored pattern, characterized in that the coating material according to claim 1 or 2 is applied onto an object to be coated by a roller coating method or a brush coating method.