JPH0211324A - Composite coating film - Google Patents

Abstract

PURPOSE:To improve durability remarkably by laminating a top coating film wherein islandlike bodies being colored and transparent or colored and semi- transparent are continuously or intermittently laminated on a colored base coating film. CONSTITUTION:On the parts where a base coating film layer 3 and islandlike bodies 5 are overlapped with each other, both colors are overlapped and shades of color are produced in accordance with the thickness of the islandlike bodies and as the result, a unique texture appears. In addition, durability and stain resistance become remarkably high by providing a primer layer 2 and a clear resin layer 6. A highly stain-resistant and highly durable resin insulating ultraviolet ray is used in the clear resin layer 6 and well protects ultraviolet deterioration of a resin and pigments in the base film layer 3 and the top coating layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to coating films suitably used in various fields such as architecture, building material manufacturing, woodworking, and metal processing, particularly for the exterior of buildings. Specifically, the present invention relates to a composite coating that is composed of multiple coating layers and has excellent texture and durability.

[Prior art and problems to be solved by the invention] Paints generally use organic or inorganic polymeric substances as a binder,
It is manufactured by dispersing colored pigments, various additives, solvents, etc. into this material, and depending on the type of these raw materials, it is given various functions, textures, colors, etc., and is used in architectural,
Used in all industrial fields such as building material manufacturing, woodworking, metal processing, etc. In this case, the purpose of painting with paint is usually to hide and protect the base, and also to improve the aesthetic appearance by coloring, so monochromatic and opaque paints are often used, but they can take advantage of the appearance of the base. Colored and transparent or colorless and transparent paints are also used to add gloss or shine.

When applying the above-mentioned paints, it is common to form a flat film with a uniform thickness, but for the exterior of buildings, etc., spraying creates a film with an uneven surface like tiles. It is being used to form and give unique textures. In addition, paints that give special textures include composite paints in which sub-paints of different colors are dispersed in the base paint so that multi-colored coatings can be obtained by multiple coatings, and transparent binders with various colors in them. Knead fibers and aggregates,
- Fiber walls, skin materials, etc., which can be coated with multicolored coatings to obtain multicolored coatings, are known.

However, in all conventional coating films, the parts that produce individual colors are made of monochromatic and opaque materials, and as a result, there are limits to the improvement of their textures.

On the other hand, paint films generally have a short maintenance cycle and must be repainted periodically. This prevents the paint film from deteriorating, staining, discoloring, etc. over time.
Improving its durability is a major challenge. However, although attempts have been made to improve the durability of current paints, the effects are not satisfactory in various respects. For example, in recent years room-temperature-curing fluororesins have been used as binders for paints, and although these paints have improved durability compared to conventional paints that use acrylic resins or urethane resins as binders, Because fluororesins are used in paint formulations, the properties of fluororesins themselves cannot be fully utilized.

Moreover, the deterioration of a coating film does not depend only on the durability of the coating film itself. For example, in the case of an exterior paint for a building, cracks in the underlying concrete cause damage to the paint film, which causes trouble in a sense other than the durability of the paint film itself. In response, elastic paints that follow cracks have been proposed, but these elastic paints have drawbacks such as surface tackiness and poor durability of the paint itself.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a composite coating film having a unique new texture and excellent durability.

[Means and effects for solving the problems] In order to achieve the above object, the composite coating film of the present invention is an upper coating film in which colored transparent or colored semi-transparent islands are continuously or intermittently linked. One or more layers are laminated on a colored base coat layer.

In this case, there is no limit to the shape of the islands in the composite coating film of the present invention, and they may be formed into any appropriate shape such as a mountain, hemisphere, or flat plate, and there are no limitations to the size or thickness of the islands. do not have. Furthermore, all of the island-like bodies may be continuous, all of them may be discontinuous, or continuous and discontinuous ones may be mixed.

Note that the means for producing the island-like bodies is not limited, but a method of forming them by spray painting, etc. is suitably adopted.

The composite coating film of the present invention has a colored transparent or translucent upper coating layer laminated on a colored base coating m, so that in the areas where the underlying coating layer and the island-like bodies of the upper coating layer overlap, When viewed from the upper coating side, the two colors are combined, and a gradation of color occurs depending on the thickness of the islands, resulting in a unique texture as a whole. In addition, in the composite coating film of the present invention, a transparent to semitransparent paint is used for the upper coating layer, but
Transparent to translucent paints inevitably have a high binder component ratio, which makes it difficult to cause chalking, which is a cause of paint film deterioration, and increases the elongation of the paint film, which is required for architectural paints. This improves the ability to follow cracks in the substrate. Therefore, the coating film of the present invention, which is a composite of the base coating layer and the upper coating layer made of the above-mentioned transparent or translucent paint,
The durability is significantly improved due to the combination of the chalking resistance and crack followability of the upper coating layer and the durability improvement effect of the composite.

Next, the present invention will be specifically explained with reference to the drawings.
The present invention is not limited to the following examples.

FIG. 1 shows an example of a preferred embodiment of the present invention.

In FIG. 1, 1 is a substrate (object to be coated), 2 is a primer layer applied to the surface of the substrate 1, and this primer layer 2 may be omitted depending on the material of the substrate 1, etc.

3 is a colored base coating layer made of a colored opaque to colored transparent paint layered on the primer layer 2;

Reference numeral 4 denotes an upper coating layer which is laminated on the base coating layer 3 and is formed by continuously or intermittently chaining approximately hemispherical islands 5 made of colored transparent to colored semi-transparent paint.

The base coating layer 3 and the upper coating layer 4 constitute the composite coating of the present invention. In this case, the base coating layer 3 and the upper coating layer 4 are formed of paints of mutually different colors. Note that 6 is a clear resin layer laminated on the upper coating layer 4 and made of a highly stain-resistant and highly durable resin that blocks ultraviolet rays, and the rear resin layer 6 is provided as necessary.

Further, FIG. 2 shows another example of the preferred embodiment of the present invention. In Figure 2, 1 is the base (object to be coated), 2
3 is a primer layer, 3 is a base coat layer, and 6 is a clear resin layer. These are the same as above, so their explanation will be omitted, but in this example, an island similar to the above is provided on base coat layer 3. A first upper coating layer 4a having a shaped body 5a and an island shaped body 5
The second upper coating film J154b having a coating film J154b having
The composite coating film of the present invention is formed by the upper coating film WJ4b. Here, the base coating layer 3 and the rain upper coating layer 4a,
One of 4b is formed by blue-based paint, the other one is formed by red-based paint, and the remaining one is formed by yellow-based paint,
It is a state in which the so-called three primary colors overlap.

In the embodiment shown in FIG. 1 above, in the area where the base coating layer 3 and the island-shaped body 5 overlap, the colors of both are matched, and the color shading (gradation) is created according to the thickness of the island-shaped body. This results in a unique texture. Further, by providing the primer layer 2 and the clear resin layer 6, durability and stain resistance are significantly increased. In this case, since the clear resin layer 6 uses a highly stain-resistant and highly durable resin that blocks ultraviolet rays, UV deterioration of the resin and pigment in the base coating layer 3 and upper coating layer 4 is effectively prevented. This will ensure that the coating film of the present invention is protected.

In addition, in the embodiment shown in Fig. 2, in addition to the same effect as the embodiment shown in Fig. 1 described above, by providing two upper coating layers, the color changes and shadings are extremely versatile. In particular, by overlapping the three primary colors, the colors change over a very wide range and an excellent texture can be obtained.

〔Effect of the invention〕

As explained above, in the composite coating film of the present invention, an upper coating layer consisting of colored transparent or colored semi-transparent islands are continuously or intermittently linked, and one layer is formed on a colored base coating layer. By laminating the layers above, the colors of the base coating layer and the island-like body overlap in the areas where they overlap, and the color shading is created according to the thickness of the island-like body, creating a unique and excellent texture. Obtainable. In this case, the presence of a transparent to translucent upper coating layer results in a very deep shade. In addition, by laminating a transparent or translucent upper coating layer with a high binder component ratio on the base coating layer, chalking resistance and crack followability are improved, resulting in excellent durability. Furthermore, in general, the greater the difference in unevenness on the surface of a coating film, the greater the degree of contamination of the coating film, but in the composite coating film of the present invention, color shading can be improved even without increasing the thickness of the islands. Therefore, excellent texture can be obtained without increasing the difference in unevenness on the surface of the paint film, so it is possible to reduce the difference in unevenness on the surface of the paint film to prevent contamination of the paint film as much as possible. Is possible.

EXAMPLES Hereinafter, the effects of the present invention will be specifically illustrated by examples.

〔Example〕

Using the paints with the formulations ■ to ■ described below, apply N by the following method.
Composite coating films of No. 1 and No. 2 were formed, and their texture and durability were examined.

- Apply 0.15 kg/rrr of acrylic primer paint (formulation ■) on a mortar board with a thickness of 15 nn, and after drying indoors for 2 hours, apply base coating paint of combination ■. 1.0kg/
M spray painting, and then apply 0.0% of the paint for the upper coating layer of formulation (■).
2kg/rrr Spray painting in a small bead pattern. After the above-mentioned painted piece was air-dried indoors for 12 hours, it was spray-coated with ultraviolet cut type fluororesin clear of formulation (1) at 0.2 kg/rrr to obtain the coating film shown in FIG. 1 above.

The appearance of this coating film is elastic enough to follow cracks in the underlying mortar, but the surface is smooth and has no tack at all, and the color is deep with shades of blue, green, and yellow. It has a certain color. The same sample completely followed the hair cracks that occurred on the mortar surface and had perfect waterproofness, with a rating of 4000 by the Sunshine Weather Meter.
Even in the accelerated weathering test, no coating abnormalities such as gloss, discoloration, fading, or peeling were observed. In addition, no abnormality was observed in the outdoor natural exposure test for one year, and there was no contamination of the paint film.

Apply 0% of the paint for the upper coating layer of compounding ■ on the upper coating layer of compounding ■.
．． 2kg/rr? Above N except for spray painting in a small bead pattern.
o, The coating film shown in FIG. 2 above was obtained in the same manner as in 1. The colors of the paints with formulations (1), (2), and (2) were selected so that the three primary colors of blue, red, and yellow overlapped with each other.

This coating exhibited a variety of complex colors with shades of yellow, green, blue, purple, and black, and no abnormality was observed in the same test as above.

Formula ■Nibrimer layer paint Vinylol (Showa Kobunshi) 100 parts by weight Toluene 100 Formula ■: Base coating paint Acronal 295DN (Mitsubishi Yuka) 100 parts by weight Titanium oxide 70/1 Phthalocyanine Blue (Toyo Ink) Dispersant Thickener ethylene glycol texanol Anti-mold agent water combination ■: Paint for upper coating layer Acronal 295DN (Mitsubishi Yuka) Chrome Niro 1500 (Toho Pigment) Dispersant anti-mold agent Thickener Texanol combination ■: Upper coating layer Layer paint Acronal 295DN (Mitsubishi Yuka) Oriental Red (Toyo Ink) Dispersant Antifungal agent Thickener 100 parts by weight 3 〃 rr n n 100 parts by weight 3 〃 n 3 〃 n Texanol 3 n formulation ■: Clear resin layer Triflon paint (Mitsui Petrochemical) 100 parts by weight Toluene 20 Curing agent 2o

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, Fig. 2 is a partially enlarged sectional view of the same example, Fig. 3 is a plan view showing another embodiment of the invention, and Fig. 4 is the same example. FIG. 2 is a partially enlarged cross-sectional view. 3... Base coating layer 4.4a, 4b... Upper coating layer 5.5a, 5b... Island-shaped body Applicant Nikka Co., Ltd. Company agent Patent attorney Takashi Kojima

Claims (1)

[Claims] 1. An upper coating layer consisting of colored transparent to colored semi-transparent island-like bodies connected continuously or intermittently on a colored base coating layer 1.
A composite coating film characterized by laminating more than one layer.