JPH038836B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Fields Recently, with the diversification of architectural styles, the demand for green-blue roofing materials has increased. This is what we intend to supply.

(b) Prior Art There is a conventional patent publication No. 57-52425 titled ``Method for manufacturing green bronze plate for roofing'', but this has the following drawbacks.

(1) When forming the protective film with water-resistant clear that is sprayed at the end, if the film thickness is 5 microns or more, the patina will wash away, so the protective film will be thin.

(2) Due to the reasons mentioned in (1) above, it has very poor weather resistance, and it has been proven that it is particularly sensitive to snow, such as peeling off due to snowfall in winter. Therefore, the material is limited to copper plate, and other materials are dangerous. Not used in

(3) Workability is limited, such as under direct sunlight or at 5°C.
Under the following conditions of insufficient drying, it is impossible to develop a greenish-blue color, and because the working conditions are difficult, on-site construction is almost impossible.

(4) Since the pattern changes depending on the climate, temperature, overlapping brushwork, etc., it is impossible to standardize the pattern for roofing materials that require multiple boards.

(5) Fast fading and whitening, and poor adhesion to materials.

In addition, there are green-blue roofing materials made by copper sheet manufacturers, but the material is limited to copper sheets,
Since the first layer is tar paint, there is a drawback that even if the upper layer paint peels off, the copper plate will not be exposed and only a jet black tar color will appear, which will seriously spoil the image.

Since this uses an inorganic upper layer paint mixed with light sand, it does not develop a natural patina, has poor workability, and cannot be applied against gravity, so it is not possible to apply it on site. It is possible.

(c) Problems to be solved by the invention The shortcomings of the prior art mentioned above are the problems, and they can be summarized as follows: (1) The weather resistance is extremely poor, so it is necessary to strengthen it and completely improve it. Responsible construction will not be possible unless efforts are made to

(2) It must be freed from poor workability that makes it impossible to manufacture only under limited environments.

(3) While creating a natural patina and pattern, it is necessary to further unify the pattern.

(4) Patina roofing sheets should be manufactured from all materials other than copper sheets to reduce costs.

(5) I do not want to use black tar in the first layer.

(d) Measures to solve the problem (1) In the conventional technology, copper powder is mixed into a water-soluble paint and applied to the copper plate, and the second step also uses a water-soluble coloring liquid, which causes strong whitening. When an organic water-resistant clear is sprayed as a protective film, all of the colored patina washes away, making it impossible to form a protective film of 5 microns or more, which is a drawback because the main ingredient is water-soluble. The present invention uses a two-component urethane resin paint as the base for all of the corresponding steps, so the protective film can be thickened and the problem of poor weather resistance is solved.

(2) However, with organic urethane resin paints, there was a problem in that it was not possible to create a patina pattern or texture, which could not be obtained compared to a flat painted surface. Therefore, the present invention
Although a high-pressure gun is used in the process, the amount of urethane resin paint containing patina powder is controlled by fine adjustment of the air, and the patina pattern is sprayed onto the material in the form of granules to create the pattern. Solved the problem.

(3) However, if only the third step is used, even if a "pattern" is obtained, the texture of the patina is insufficient, so in order to solve this problem, the present invention conventionally used spraying to form a protective film. Focusing on a transparent urethane resin clear, the conventional technology involves mixing the urethane resin clear main agent and curing agent at a weight ratio of 4:1 and adding patina powder at a weight ratio of 10% to 30% to the total amount to make it translucent. Then, we adopted an unprecedented and highly innovative construction method as the fourth step, and here we succeeded in producing a smooth appearance of patina, breaking through the limits of organic paints and establishing a manufacturing method for producing patina plates using organic paints. It is something.

(E) Function Since it is based on organic urethane resin paint, it has excellent workability as a roofing material such as cutting and bending, and there is no peeling or cracking caused by these operations, and it can be used in any way other than rain or snow. Workability has greatly improved as construction can be carried out on site regardless of the weather or temperature.

(f) Examples Example 1 Embodiments of the present invention will be described based on the accompanying drawings.

The board 1 can be made of any metal such as copper or iron, cement board, ceramic board, synthetic resin board, or wooden board. In the first step, a surface treatment suitable for each base plate is applied to the surface of the board 1 described above. That is, if it is a metal plate, dust and oil are wiped off with thinner, and if it is a cement board or the like, it is treated with a sealer to form the base-treated surface 2. Next, a second coat of two-component urethane resin paint A with a color that matches greenish-blue is applied to the base-treated surface 2.
By carrying out the process, the undercoated surface 3 is formed. After drying this surface, mix the urethane resin paint base and curing agent at a weight ratio of 4:1, and add a two-component urethane resin paint B containing a patina powder of 10% to 30% by weight based on the total amount. The patina pattern forming surface 4 is formed by molding the spray shape of the paint by finely adjusting the air while using a high pressure gun, and performing the third step of making the "pattern" appear in the form of granules.
However, at this stage, no patina has appeared at all, so we devised a manufacturing method that is innovative and full of surprises that had not yet been developed using conventional technology. That is, the urethane resin clear that was not used as it was transparent for the purpose of forming a protective film was not used as it was, but the urethane resin clear main ingredient and curing agent were mixed at a weight ratio of 4:1, and the weight ratio was 10% to 10% of the total amount. 30% of patina powder is added to produce a pale greenish-blue translucent two-component urethane resin paint C, and in the fourth step of spraying this, a pale greenish-blue filter is formed on the verdigris pattern forming surface 4. Forms a film-like protective film,
Here, a patina surface 5 was produced that exhibited a perfect patina pattern.

Example 2 After the first, second, third, and fourth steps shown in Illustrative Example 1, a fluororesin clear can be sprayed as a fifth step to enhance long-term weather resistance.

(g) Effects of the invention (1) This invention is not limited to copper plates as in the past, but can also be made of any other material such as other metal plates, inorganic plates such as cement, synthetic resin plates, wooden plates, etc. It is now possible to manufacture boards.

(2) Because it does not use a water-soluble base agent, it has excellent weather resistance and adhesion, and the benefits of being able to carry out responsible construction are hard to overstate.

(3) It is possible to unify the pattern while fully bringing out the natural patina pattern and texture.

(4) It has excellent workability and can be manufactured in any environment, making it possible to perform on-site construction, which is the most desirable method for roof construction.

(5) There is no need to create a rough surface by sanding, so the thickness of the material is not reduced.

(6) Since it is no longer necessary to apply tar or use light sand for the first layer, it has become possible to manufacture the product by applying it against gravity.

(7) Since it is organic, it will not whiten or fade, and there is no danger of discoloration or peeling, especially in cold regions with heavy snowfall.

[Brief explanation of the drawing]

The drawings show examples of the present invention, and FIG. 1 is a partially cutaway surface view of an example of a patina plate obtained by the present manufacturing method. FIG. 2 is an enlarged sectional view of the same as above. 1... board, 2... surface with surface treatment completed, 3... surface with completed undercoating, 4... surface with patina pattern formation, 5... surface with patina pattern.

Claims (1)

[Claims] 1. The first step is to perform a surface treatment on the board, the second step is to form a film with two-component urethane resin paint A, and the third step is to spray the two-component urethane resin paint B containing verdigris powder in a pattern shape. and 10% by weight based on the total amount of urethane resin clear base agent and curing agent.
A fourth step of spraying a two-component urethane resin paint C containing 30% patina powder.