JPH10183854A - Painted panel for building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide excellent weather resistance by laminating a prime painting film layer coated on the surface of metal base material and a design layer having a design, and providing a top coat layer top-coated on the design layer. SOLUTION: A backing painting film layer 2 painted and baked by means of fluorine-based solid organic paint as prime painting is laminated on a metal base material 1 composed of a normal steel plate and a stainless steel plate. A design layer 3 is given on the prime painting film 2 by sticking of a transfer sheet by epoxy resin, and a top coat layer 4 top-coated by fluorine clear paint on the design layer 3 is laminated to form a painting panel. Thus, a facing and interior painting panel combining weather resistance, corrosion resistance and design can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an undercoat coating on a metal base material used for building materials such as houses, buildings, factories, etc., followed by applying a pattern layer, and further coating a top coat thereon. The present invention relates to a painted panel having three layers of a base coat layer, a picture layer, and a top coat layer, which is excellent in weather resistance, corrosion resistance and design.

[0002]

[Prior Art] Building materials for houses, buildings, factories, etc.
Road facilities, outdoor structures such as bridges, vehicles such as cars, trains, and airplanes, as well as indoor dwelling equipment such as home appliances and furniture, are generally painted for the purpose of imparting beauty and improving durability. It is. In particular, in recent years, as the demand for building materials for interior and exterior has increased, the demand for a coated panel using a metal as a base material, which is excellent in design and workability, in addition to the beauty and durability conventionally required has been increasing.

[0003] Paints applied to metal substrates for building materials are:
In general, coatings mainly composed of an organic system in which a polymer chain has a CC bond have been widely used. In recent years, water glass, colloidal silica, or the like is dispersed and dissolved in water, a solvent, or the like, or ethyl silicate or the like is used. Inorganic paints dispersed in solvents, and furthermore, Yoshio Ichikawa and Makoto Emi "painting on building materials" painting technology 94 'October P.65, Yoshiyuki Nishigata "painting of curtain walls" painting Technology 94 'March A ceramic paint containing an organic or inorganic paint and being compounded is being developed as disclosed in P.100.

For example, as disclosed in JP-B-63-22977, an organic resin such as an acrylic resin, an epoxy resin, a melamine resin, a polyester resin, or polyvinyl butyral is used as an undercoat on the surface of an embossed steel sheet having an uneven surface. A technique has been disclosed in which a paint is applied undercoating, and subsequently, an inorganic paint such as a transparent paint, a metallic paint or an enamel paint is applied as an overcoat paint.

Japanese Patent Application Laid-Open No. H5-50796 discloses a transfer sheet as a technique for imparting a design property such as a picture pattern, and describes that three layers of a release layer, an ink layer and a top coat are required as the transfer sheet. Have been. The main purpose of coating a metal substrate with a building material coating panel is to impart weather resistance, corrosion resistance, beauty, and design, but the prior art is disclosed in JP-B-63-22977. As described in Japanese Patent Application Laid-Open No. 5-50796, a technique using a resin as a paint is disclosed as a technique for imparting a design property to a transfer sheet. No technology has been disclosed at the same time.

The present invention has been made to provide a coating panel for interior / exterior building materials, which has both weather resistance, corrosion resistance, and design properties which were not found in the conventional coating panels as described above. .

[0007]

The main purpose of coating on building materials and the like is to impart beauty, corrosion resistance, corrosion resistance, etc., but as the demand for building materials has increased in recent years, these materials have also been designed. Painted panels have been required. However, at present, a coated panel satisfying these properties such as weather resistance, corrosion resistance and designability has not been obtained.

An object of the present invention is to provide a coating panel for building materials which has both weather resistance, corrosion resistance and design properties which were not found in conventional coated panels.

[0009]

According to the present invention, there are provided three layers: a base coat layer formed by undercoating on a surface of a metal substrate, a picture layer provided with a picture on the upper surface thereof, and a top coat layer provided by top coating thereon. A coating panel for building materials having excellent weather resistance, corrosion resistance and design properties, and has three layers of a base coat layer, a picture layer and a top coat layer on both sides of a metal base in order from the metal base. This is a painted panel for building materials having excellent weather resistance, corrosion resistance and design.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below. FIG. 1 is a cross-sectional view of the coating layer of the present invention when applied to a metal substrate. Undercoating, application of a pattern, and topcoating are performed in order from the metal substrate 1 side to obtain a coated panel including three layers of a base coat layer 2, a pattern layer 3, and a topcoat layer 4.

As the metal substrate 1 to be subjected to the base coating, a common steel plate (Fe plate), a stainless steel plate, an Al plate, and a common steel plate, for example, Al plating, Zn plating, Al-Zn alloy plating, Sn
Applied to plated steel sheets that have been plated. As the base coating material to be coated on such a metal base material, an organic, inorganic, or ceramic composite coating of both, which is extremely effective in improving weather resistance and corrosion resistance, is suitable. Organic coatings include fluorine coatings, and inorganic coatings include alkali silicates (Na, K, Li salts as silicates)
Paints, and metal alkoxides (alkoxysilane compounds) and the like are typical paints.
Further, as the ceramic paint, a composite of a polymer component of a fluorine paint and an inorganic alkali silicate component is suitable.

[0012] As an undercoat of an organic, inorganic or a composite of both ceramics, it is necessary to apply one of them alone. In other words, the compatibility between organic and inorganic coatings, between organic and ceramic coatings, and between inorganic and ceramic coatings is poor. This is because boiling occurs and the product value is impaired. For example, it is preferable to use inorganic and ceramic paints to obtain a paint panel excellent in durability mainly, and to use an organic paint alone as a base paint alone to obtain a paint panel excellent in corrosion resistance. . However, when two coats and two bake base coats are used, organic and inorganic coatings, organic and ceramics coatings, and inorganic and ceramics coatings are possible.

Subsequently, a picture layer is applied. Appropriate patterns are provided by pasting a transfer sheet, drawing a picture by a drawing machine, transferring a picture by a printing method, drawing a picture by a recoating method (masking), and the like. . The same type of transfer paper and pattern depiction as the base paint of the present invention is desirable as the transfer paper and the pattern depiction to which the pattern layer is applied. In addition, a pattern layer mainly composed of an epoxy resin, an acrylic resin, or a urethane resin is suitable.

Further, after the pattern layer is applied, a top coat is continuously applied to maintain the beautifulness of the pattern layer and to improve weather resistance and corrosion resistance. As the top coat, a transparent paint (clear) of the same type as the base paint for maintaining the beauty of the picture layer is desirable in order to maintain the beauty of the picture layer. The conditions for baking at the time of painting in the above method are as follows: baking after undercoating → pattern layer application → top coat painting → 3 coats 2 bake to bake, undercoating → pattern layer application → top coat → 3 coats to bake 1 Bake,
Undercoating → baking → pattern layer application → baking → top coat → baking.

As described above, a pattern layer is applied to a metal substrate that has been coated with an inorganic, organic, or ceramic material, and a top coat is further formed thereon.
By providing a paint film layer consisting of a picture layer and a top coat layer, it is possible to obtain interior / exterior painted panels that have both weather resistance, corrosion resistance, and design that were not found in conventional painted panels. It is.

[0016]

【Example】

(Example 1) An example of the present invention will be described below in more detail. Stainless steel plate (SUS) as metal substrate
304), and then using a fluorine-based solid organic paint as a base coat, followed by baking, followed by applying a pattern layer by pasting a transfer sheet with an epoxy resin,
Finally, a top panel was coated with a fluorine-based clear paint and baked to form a three-layer, two-baked coated panel consisting of three layers.

The weather resistance was evaluated by a sunshine test (evaluated by the gloss retention of the coating film after 5000 hours), and the corrosion resistance was evaluated by an accelerated test of SST (evaluated by the blistering state of the cross-cut portion after 3000 hours). Table 1 shows the results. A stainless steel plate (SUS304) was used as a metal substrate, and an acrylic resin-based paint was applied as a base coat thereon, and then baked, without a pattern layer, top-coated with an acrylic resin-based paint as a top coat, and baked. When compared with the coated steel sheet of the conventional example 1, in the example of the present invention, the sunshine 5000h
The subsequent gloss retention of the coating film was about 95%, whereas the conventional example 1 was remarkably inferior to about 50%.

Further, the SST 30 of the painted panel of the first embodiment
The coating film swelling after 00 h did not change at all, whereas the coating panel of Conventional Example 1 generated many coating film swelling. Table 1 shows the weather resistance, corrosion resistance, etc. of various coated panels of the example according to the present invention and the conventional example. However, the coated panels according to the present invention all have weather resistance, corrosion resistance,
It is clear that all of the design properties are excellent.

[0019]

[Table 1]

[0020]

According to the present invention, it is possible to obtain a painted panel for building materials having both weather resistance, corrosion resistance and design properties which were not found in conventional painted panels for building materials.

[Brief description of the drawings]

FIG. 1 is a sectional view of a building material coating panel according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 metal base material 2 base coat layer 3 picture layer 4 top coat layer

Claims (2)

[Claims] 1. A weather resistance and corrosion resistance having three layers of a base coat layer coated with an undercoat, a pattern layer provided with a pattern on the upper surface thereof, and a top coat layer formed thereon with a top coat thereon. Painted panels for building materials with excellent design. 2. A building material having three layers of a base coat layer, a picture layer and a top coat layer on both front and back surfaces of a metal substrate in order from the metal substrate side, and having excellent weather resistance, corrosion resistance and design properties. Painted panels.