JPH0373345B2 - - Google Patents

Description

[Detailed description of the invention] (Subject of invention: Field of industrial application) The present invention relates to a coating method.

(Prior art) Painting involves spreading paint on the surface of the object to be painted, drying and curing it to form a continuous film that protects the object from corrosion, decay, aging, etc., and also beautifies the object with gloss and color. It is something that is given.

In particular, there are various painting methods for beautifying the latter, such as mixing aggregate (crushed stone),
A model with a stone surface finish has already been proposed.

(Objective of the present invention) The present invention provides a novel multi-colored pattern coating method, particularly a novel coating method capable of producing the texture of granite without using aggregate or the like.

(Structure of the present invention) The present invention comprises: (a) a step of simultaneously spraying two or more paints with widely different tactile properties (thixotropy) onto a surface to be coated to form a coating film; (b) a coating film. (c) After drying and curing, the paint film is ground until a desired color pattern appears on the surface; (c) After the paint film surface is ground, the paint film surface is coated with a transparent paint.

In the present invention, tactile (thixotropic)
thixotropy). In other words, paints have tactile properties (thixotropy) to a greater or lesser degree, but in the present invention, paints with high tactile properties (thixotropy) are fluid when sprayed, and fluid when sprayed onto a wall surface. This is a concept that refers to paint that has the property of stopping (does not drip). Furthermore, the paint referred to in the present invention is a broad concept that includes resin mortar and the like.

In the present invention, two or more colors of dyes are simultaneously sprayed onto the surface to be painted. In other words, by simultaneously spraying paints with high tactile properties, different colors are created, as shown in FIG. The paint 12 is sprayed to form a coating film.

Double-headed guns, multiple ricing guns, mortar guns, etc. are used for spraying paint.

In the present invention, the surface is ground after drying and curing the coating film. Sandpaper, sander, sandblasting, etc. are used to grind the surface.

The paint 12 that overlaps with the mixture during spraying and also due to grinding of the surface of the paint film as shown in FIG.
The coating film is thinned or partially removed, and a color pattern that creates a design effect is brought out between it and the underlying paint 10.

For example, if the lower paint 10 is black and the upper paint 12 is white, the overlapping parts will be white when viewed from above, but the paint 12 will become thinner due to grinding, and the overlap between the lower paint 10 will be white. It appears gray in color. This gray can be any color, such as white or a gray close to black, depending on the degree of grinding of the paint 12. This also applies to other colors.

Then, in addition to clarifying the differences between the colors of the color pattern, a transparent paint is applied for polishing, water resistance, stain prevention, and, if the paint is cement-based, to protect the base, such as weather resistance and chemical resistance. .

The implementation of the coating method according to the present invention will be explained in more detail by dividing it into steps.

1. Surface treatment process Before applying the paint, apply a surface treatment to the surface to be painted. If the surface to be painted is weak due to dryout or weathering of the mortar surface, reinforce it with a penetrating primer. Also, if the adhesion between the painted surface and the paint is insufficient, apply a primer in advance.

If the surface to be painted is not smooth, such as exposed concrete, correct it with a surface conditioning filler such as putty or cement-based filler.

2. Spraying process Two or more colors of paint are simultaneously sprayed using multiple ricing guns, mortar guns, etc. according to the number of color sets to create a multicolored coating.

In spraying, each nozzle, air volume, and air pressure are adjusted according to the desired pattern and hue, and a number of arbitrary patterns are created by adjusting color combinations, number of colors, paint viscosity, etc.

The spray amount should be approximately 0.5 to 3.0 mm to completely cover the base and form a continuous coating. In addition,
In the case of sandblasting grinding, it is desirable to have a diameter of about 1.0 to 3.0 mm.

3 Grinding process After drying and hardening the coating, use sandpaper, sander,
Small paint particles 14 adhering to the surface of the paint film during spraying are ground by sandblasting or the like, and the paints 10 and 12 are ground so that an arbitrary color pattern appears. The type of grinding tool to be used depends on the desired surface finish. For example, in the case of a smooth surface, it is ground with sandpaper (finishing sander), a sander, etc., and in the case of a crushed stone surface that gives a three-dimensional effect, it is ground with sandblasting.

4 Clear paint coating process A predetermined color pattern can be obtained by grinding. When a transparent paint such as varnish or clear paint is applied to the surface of the paint film that has a color pattern created by this grinding, the paint film becomes wet and colored, which makes the color difference between the paints clearer and creates a color pattern. stands out clearly. Furthermore, stain prevention, water repellency, water resistance, gloss, and base protection can be achieved by applying a transparent paint.

Examples of the transparent paint include acrylic resin paint, polyurethane resin paint, polyester resin paint, and epoxy resin paint.

Application methods include spray, roller,
You can raise the sink, brush, etc.

(Example) Example 1 Use flexible board for the surface to be painted.

and, Portland cement (white) 30.0% by weight Calcium carbonate 54.0% by weight Methyl cellulose 0.4% by weight Tactile agent (thixotropic agent) 1.6% by weight Titanium oxide 5.0% by weight Powder emulsion 9.0% by weight A paint consisting of the composition is obtained.

This paint is white without the addition of pigments, and black with the addition of iron black pigment to approximately the color of Japan Paint Manufacturers Association color sample book H _1-1007 to obtain two-color paints: white and black.

To adjust the viscosity of the paint, water was added during spraying, mixed using a stirrer, adjusted to a flow value of 200±50 mm, and sprayed with a double-headed gun.

After drying and curing of the coating film, the surface of the coating film was ground with a sander to the extent that a color pattern with the texture of natural stone appeared.

Thereafter, a transparent paint made by diluting a solvent-based acrylic resin (45%) with toluene to a resin concentration of 22.5% was applied twice with a roller brush.

In addition, in the case of spray application, the resin concentration is 15%.
Just apply it once.

In this way, the paint film was wet-colored, thereby making the color difference of the paint clear, and it was possible to obtain a painted surface in which a color pattern similar to that of granite clearly stood out.

Example 2 A material made of lightweight aerated concrete is used for the surface to be painted. Emulsion resin (50%) 51.0% by weight Calcium carbonate 27.0% by weight Talc 4.6% by weight Clay 6.7% by weight Catalytic agent (thixotropic agent) 2.2% by weight Titanium oxide 4.5% by weight Sodium hexametaphosphate 1.8% by weight Aqueous ammonia 0.4% by weight A paint having a composition of 0.9% by weight of foaming agent and antifungal agent and 0.9% by weight of ethylene glycol is obtained.

This paint has a solid content concentration of 71±2% and a viscosity of 150000±.
30000cps (BH type viscometer 4r.pm) pvc is about 40%. This paint is colored with white without any pigments and with iron black pigment to the color of Japan Paint Manufacturers Association color sample book H _1-1033 . Adjust the viscosity with water when spraying.
Dilute and adjust to about 50,000 to 80,000 cps (BH type viscometer 4 r.pm). The painting tool used was Suzuka Paint Co., Ltd. Laughton No. 5 gun (double head), and the air pressure was approximately 5.
Spraying was carried out at Kg/cm ² . After leaving it indoors for 24 hours, it was ground with a finishing sander (sandpaper CC100).

Thereafter, a transparent paint made by diluting a solvent-based acrylic resin (45%) with toluene to a resin concentration of 22.5% was applied twice with a roller brush.

In addition, in the case of spray application, the resin concentration is 15%.
Just apply it once.

As a result, the color difference between the paints became clearer, and a painted surface with a color pattern similar to that of granite could be obtained.

(Effects of the Invention) The present invention has the above configuration and can provide a novel multi-colored pattern coating method, particularly a novel coating method capable of producing the texture of granite without using aggregate or the like.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view after painting, and FIG. 2 is a partial sectional view after grinding. 10, 12: Paint.

Claims (1)

[Scope of Claims] 1 (a) A process of simultaneously spraying two or more paints with widely different tactile properties (thixotropy) onto a surface to be coated to form a coating film, (b) Drying and curing of the coating film. (c) After grinding the surface of the paint film, the surface of the paint film is coated with a transparent paint.