JPH03224950A - High weather-proof metal ricin plate - Google Patents

Abstract

PURPOSE:To promote weather-proofness and design efficiency by coating the face including aggregate together as a unit with an overcoat making fluororesin as one ingredient after sticking the aggregate on the face of a metal plate with a base-coat as adhesives making fluororesin as one composition. CONSTITUTION:A base-coat 3 making fluororesin as one composition is stuck on the surface of a base material such as a metal plate, etc., and aggregate 4 is stuck on the surface thereof with the base-coat 3 as adhesives. The face 5 including the aggregate 4 is coated together as a unit with an overcoat 6 making fluororesin as one ingredient. According to the constitution, weather- proofness, corrosion resistance and pollution resistance are greatly improved and, at the same time, design efficiency can be promoted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a highly weather-resistant metallic lysine material useful for building materials such as roofing materials and exterior wall materials in which a lysine coating film is formed on at least the decorative surface of a thin metal sheet. be.

[Conventional technology]

Generally, a method for forming ricin on a metal plate or its plate material is disclosed in JP-A-50-17488 and JP-A-52-
Publication No. 141846, and JP-A-54-127934
No. 2, etc. are known.

[Problem to be solved by the invention]

However, in this type of ricin steel sheet, the weather resistance is about 3.
~5 years is not that long.

■Vehicles such as polyurethane resin and polyester resin deteriorate quickly in color. ■The base coat and overcoat are compatible, making it easy to select the resin, but it lacks weather resistance. ■In ricin coating, the aggregate contributes to pinholes, so it is necessary to lower the viscosity of the coating film and improve wetting, so the coating thickness is thinner and the color of the base and aggregate has hiding power. The color of the makeup surface changes depending on the relationship. There were disadvantages such as

[Means to solve the problem]

In order to eliminate these drawbacks, the present invention forms a fluorine coating film on the base coat, adheres the aggregate, and then coats the entire decorative surface with almost the same paint as the base coat as an overcoat. This paper proposes a highly weather-resistant metal lysine plate with significantly improved color fastness, weather resistance, stain resistance, and design.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the highly weather-resistant metal ricin plate (hereinafter simply referred to as ricin plate) according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory diagram showing a part of the cross section of the above-mentioned lysine board, in which a base coat 3 is fixed to the surface of a base material 2 with a lysine board, and aggregates 4 are scattered thereon, such as coarse, high-density, etc. An overcoat 6 is applied to the decorative surface 5 including the aggregate 4 to cover the entire decorative surface 5 or on a thin board. To explain further, the base material 2 is a stainless steel plate,
It is made of one type of plate, such as an aluminum plate, a galvanized iron plate, a colored steel plate, a titanium plate, etc., or an embossed plate. Preferably, a colored copper plate is the most desirable in terms of cost and weather resistance. The configuration is shown in Figure 2. That is, the base material 2 has iron (a) as a core material, zinc metal (a), a chemical conversion coating (c), an undercoat layer (ii), and a topcoat layer (e). At this time, the top coat layer E is a coating film having good compatibility and adhesion with the base coat 3. Of course, at this time, if the baking is incomplete (baking remains), the base coat 3 and overcoat 6 may be integrated at the same time as baking to further improve the degree of adhesion. Note that the above-mentioned coating film does not exist on stainless steel and aluminum plates.

In addition, base coat 3 is composed of 5 to 50% fluorine resin.
It is a paint layer that contains about 30% (weight ratio) and functions as an adhesive, and its thickness is about 10 to 50 microns (
wet). Aggregate 4 is silica sand, rock, zeolite, vermiculite, mica, alumina, shirasu balloon, pearlite grains, glass grains, ceramic grains, metal powder.
It consists of more than one species, the size of which is approximately 1 to 250 meshes, or a mixture of species. Of course, the aggregate 4 is composed of one or more types of grains, adjacent pieces, etc., and its distribution can be sparse, dense, striped, linear, patterned, etc. depending on its purpose. . Furthermore, the overcoat 6 contributes to covering the exposed surface of the aggregate 4 and improving weather resistance, and uses fluorine paint as its main component. Of course, the fluorinated paint has good compatibility with the base coat 3, and has fluorinated resin as its main component, to which acrylic resin and pigment are added.

Examples of fluorocarbon resins (abbreviations) are PTFE, FEP,
PFA, HPE.

It contains about 10 to 50% of the vehicle, such as PCTFE, PVDF, HTFE, PVF, etc. To give a specific example, (1) 80 to 40 parts by weight of a fluoroolefin-vinyl monomer copolymer and 85% or more of an alkyl (meth)acrylate having a carbon number of 2 to 5 and a molecular weight of 15,000 to 40,000. Acrylic resin containing 20 to 6
Paints containing 0 parts by weight, pigments, and curing agents, paints containing acrylic-modified vinylidene fluoride resin as the main component and adding ultraviolet absorbers to this, and having a viscosity of about 30 to 500 CPS when applied. It is.

Here, a base coat 3 containing polyester resin as the main component and to which 10 parts by weight of fluorocarbon resin is added is formed on a colored steel plate, and aggregate 4 (28 to
32 mesh) on an average, and then apply the above-mentioned paint (2) as overcoat 6, and apply approximately 200 to 250 mesh.
A test piece fired to 'C (example) and a test piece (comparative example) coated with base coat 3 and overcoat 6 using the same paint as the color steel plate were prepared, and the performance was compared as shown in the table below.

However, ■ is 60° specular reflectance, ■ Magic ink removability, ■ Pencil hardness after baking, ■ Goban eye Cellotape peeling test (however, aggregate is sold separately), ■ 1ooo time,
■Sunshine Weather) - Tar irradiation 3000 h 0 What has been described above is only one embodiment of the present invention. It can also be used as a surface material. Of course, it is also possible to fill the aggregate 4 on the embossed base material 2 or only in the recesses to form the appearance shown in FIGS. 5(a) and 5(b).

〔Effect of the invention〕

As described above, according to the ricin board according to the present invention, aggregate can be fixed while forming a fluorine coating film. ■You can take advantage of the benefits of fluorocarbon paint. ■A ricin-like appearance can be created while forming a fluorine coating. ■Excellent weather resistance, corrosion resistance, and stain resistance. ■Even the ricin board has excellent stain resistance, so the appearance is less likely to get dirty due to dust, etc., and can be guaranteed for more than 10 years. ■Since the gloss does not deteriorate, the outer surface of the aggregate can be emphasized over a long period of time to make it appear more prominent, and the three-dimensional effect can be enhanced. ■There is no mold growth due to good water contact. It has the following characteristics and effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an enlarged part of the highly weather-resistant metal ricin plate according to the present invention, FIG. 2 is an explanatory diagram showing a further enlarged extraction of the plate, and FIGS. U) and FIGS. 4(a) to (e) are cross-sectional views showing examples of building materials using the above-mentioned ricin board, and FIGS. 5(a) and (g)) are embossed boards filled with aggregate 4. FIG. 2 is an explanatory diagram showing an enlarged part of the decorative surface 5. Top: ・Highly weather resistant metal ricin plate, ・Base material, ・Base coat, ・Aggregate, Overcoat.

Claims (1)

[Claims] (1) A base coat containing fluorocarbon resin as one component is provided on the decorative surface of a metal plate, aggregate is fixed together using the base coat as an adhesive, and the decorative surface containing the aggregate is coated with an overcoat containing fluorocarbon resin as one component. Highly weather resistant metal ricin plate characterized by being integrally coated with a coat.